| /* |
| * $Id: synclinkmp.c,v 4.38 2005/07/15 13:29:44 paulkf Exp $ |
| * |
| * Device driver for Microgate SyncLink Multiport |
| * high speed multiprotocol serial adapter. |
| * |
| * written by Paul Fulghum for Microgate Corporation |
| * paulkf@microgate.com |
| * |
| * Microgate and SyncLink are trademarks of Microgate Corporation |
| * |
| * Derived from serial.c written by Theodore Ts'o and Linus Torvalds |
| * This code is released under the GNU General Public License (GPL) |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
| * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| * OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq)) |
| #if defined(__i386__) |
| # define BREAKPOINT() asm(" int $3"); |
| #else |
| # define BREAKPOINT() { } |
| #endif |
| |
| #define MAX_DEVICES 12 |
| |
| #include <linux/module.h> |
| #include <linux/errno.h> |
| #include <linux/signal.h> |
| #include <linux/sched.h> |
| #include <linux/timer.h> |
| #include <linux/interrupt.h> |
| #include <linux/pci.h> |
| #include <linux/tty.h> |
| #include <linux/tty_flip.h> |
| #include <linux/serial.h> |
| #include <linux/major.h> |
| #include <linux/string.h> |
| #include <linux/fcntl.h> |
| #include <linux/ptrace.h> |
| #include <linux/ioport.h> |
| #include <linux/mm.h> |
| #include <linux/seq_file.h> |
| #include <linux/slab.h> |
| #include <linux/netdevice.h> |
| #include <linux/vmalloc.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/ioctl.h> |
| |
| #include <asm/io.h> |
| #include <asm/irq.h> |
| #include <asm/dma.h> |
| #include <linux/bitops.h> |
| #include <asm/types.h> |
| #include <linux/termios.h> |
| #include <linux/workqueue.h> |
| #include <linux/hdlc.h> |
| #include <linux/synclink.h> |
| |
| #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINKMP_MODULE)) |
| #define SYNCLINK_GENERIC_HDLC 1 |
| #else |
| #define SYNCLINK_GENERIC_HDLC 0 |
| #endif |
| |
| #define GET_USER(error,value,addr) error = get_user(value,addr) |
| #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0 |
| #define PUT_USER(error,value,addr) error = put_user(value,addr) |
| #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0 |
| |
| #include <asm/uaccess.h> |
| |
| static MGSL_PARAMS default_params = { |
| MGSL_MODE_HDLC, /* unsigned long mode */ |
| 0, /* unsigned char loopback; */ |
| HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */ |
| HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */ |
| 0, /* unsigned long clock_speed; */ |
| 0xff, /* unsigned char addr_filter; */ |
| HDLC_CRC_16_CCITT, /* unsigned short crc_type; */ |
| HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */ |
| HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */ |
| 9600, /* unsigned long data_rate; */ |
| 8, /* unsigned char data_bits; */ |
| 1, /* unsigned char stop_bits; */ |
| ASYNC_PARITY_NONE /* unsigned char parity; */ |
| }; |
| |
| /* size in bytes of DMA data buffers */ |
| #define SCABUFSIZE 1024 |
| #define SCA_MEM_SIZE 0x40000 |
| #define SCA_BASE_SIZE 512 |
| #define SCA_REG_SIZE 16 |
| #define SCA_MAX_PORTS 4 |
| #define SCAMAXDESC 128 |
| |
| #define BUFFERLISTSIZE 4096 |
| |
| /* SCA-I style DMA buffer descriptor */ |
| typedef struct _SCADESC |
| { |
| u16 next; /* lower l6 bits of next descriptor addr */ |
| u16 buf_ptr; /* lower 16 bits of buffer addr */ |
| u8 buf_base; /* upper 8 bits of buffer addr */ |
| u8 pad1; |
| u16 length; /* length of buffer */ |
| u8 status; /* status of buffer */ |
| u8 pad2; |
| } SCADESC, *PSCADESC; |
| |
| typedef struct _SCADESC_EX |
| { |
| /* device driver bookkeeping section */ |
| char *virt_addr; /* virtual address of data buffer */ |
| u16 phys_entry; /* lower 16-bits of physical address of this descriptor */ |
| } SCADESC_EX, *PSCADESC_EX; |
| |
| /* The queue of BH actions to be performed */ |
| |
| #define BH_RECEIVE 1 |
| #define BH_TRANSMIT 2 |
| #define BH_STATUS 4 |
| |
| #define IO_PIN_SHUTDOWN_LIMIT 100 |
| |
| struct _input_signal_events { |
| int ri_up; |
| int ri_down; |
| int dsr_up; |
| int dsr_down; |
| int dcd_up; |
| int dcd_down; |
| int cts_up; |
| int cts_down; |
| }; |
| |
| /* |
| * Device instance data structure |
| */ |
| typedef struct _synclinkmp_info { |
| void *if_ptr; /* General purpose pointer (used by SPPP) */ |
| int magic; |
| struct tty_port port; |
| int line; |
| unsigned short close_delay; |
| unsigned short closing_wait; /* time to wait before closing */ |
| |
| struct mgsl_icount icount; |
| |
| int timeout; |
| int x_char; /* xon/xoff character */ |
| u16 read_status_mask1; /* break detection (SR1 indications) */ |
| u16 read_status_mask2; /* parity/framing/overun (SR2 indications) */ |
| unsigned char ignore_status_mask1; /* break detection (SR1 indications) */ |
| unsigned char ignore_status_mask2; /* parity/framing/overun (SR2 indications) */ |
| unsigned char *tx_buf; |
| int tx_put; |
| int tx_get; |
| int tx_count; |
| |
| wait_queue_head_t status_event_wait_q; |
| wait_queue_head_t event_wait_q; |
| struct timer_list tx_timer; /* HDLC transmit timeout timer */ |
| struct _synclinkmp_info *next_device; /* device list link */ |
| struct timer_list status_timer; /* input signal status check timer */ |
| |
| spinlock_t lock; /* spinlock for synchronizing with ISR */ |
| struct work_struct task; /* task structure for scheduling bh */ |
| |
| u32 max_frame_size; /* as set by device config */ |
| |
| u32 pending_bh; |
| |
| bool bh_running; /* Protection from multiple */ |
| int isr_overflow; |
| bool bh_requested; |
| |
| int dcd_chkcount; /* check counts to prevent */ |
| int cts_chkcount; /* too many IRQs if a signal */ |
| int dsr_chkcount; /* is floating */ |
| int ri_chkcount; |
| |
| char *buffer_list; /* virtual address of Rx & Tx buffer lists */ |
| unsigned long buffer_list_phys; |
| |
| unsigned int rx_buf_count; /* count of total allocated Rx buffers */ |
| SCADESC *rx_buf_list; /* list of receive buffer entries */ |
| SCADESC_EX rx_buf_list_ex[SCAMAXDESC]; /* list of receive buffer entries */ |
| unsigned int current_rx_buf; |
| |
| unsigned int tx_buf_count; /* count of total allocated Tx buffers */ |
| SCADESC *tx_buf_list; /* list of transmit buffer entries */ |
| SCADESC_EX tx_buf_list_ex[SCAMAXDESC]; /* list of transmit buffer entries */ |
| unsigned int last_tx_buf; |
| |
| unsigned char *tmp_rx_buf; |
| unsigned int tmp_rx_buf_count; |
| |
| bool rx_enabled; |
| bool rx_overflow; |
| |
| bool tx_enabled; |
| bool tx_active; |
| u32 idle_mode; |
| |
| unsigned char ie0_value; |
| unsigned char ie1_value; |
| unsigned char ie2_value; |
| unsigned char ctrlreg_value; |
| unsigned char old_signals; |
| |
| char device_name[25]; /* device instance name */ |
| |
| int port_count; |
| int adapter_num; |
| int port_num; |
| |
| struct _synclinkmp_info *port_array[SCA_MAX_PORTS]; |
| |
| unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */ |
| |
| unsigned int irq_level; /* interrupt level */ |
| unsigned long irq_flags; |
| bool irq_requested; /* true if IRQ requested */ |
| |
| MGSL_PARAMS params; /* communications parameters */ |
| |
| unsigned char serial_signals; /* current serial signal states */ |
| |
| bool irq_occurred; /* for diagnostics use */ |
| unsigned int init_error; /* Initialization startup error */ |
| |
| u32 last_mem_alloc; |
| unsigned char* memory_base; /* shared memory address (PCI only) */ |
| u32 phys_memory_base; |
| int shared_mem_requested; |
| |
| unsigned char* sca_base; /* HD64570 SCA Memory address */ |
| u32 phys_sca_base; |
| u32 sca_offset; |
| bool sca_base_requested; |
| |
| unsigned char* lcr_base; /* local config registers (PCI only) */ |
| u32 phys_lcr_base; |
| u32 lcr_offset; |
| int lcr_mem_requested; |
| |
| unsigned char* statctrl_base; /* status/control register memory */ |
| u32 phys_statctrl_base; |
| u32 statctrl_offset; |
| bool sca_statctrl_requested; |
| |
| u32 misc_ctrl_value; |
| char flag_buf[MAX_ASYNC_BUFFER_SIZE]; |
| char char_buf[MAX_ASYNC_BUFFER_SIZE]; |
| bool drop_rts_on_tx_done; |
| |
| struct _input_signal_events input_signal_events; |
| |
| /* SPPP/Cisco HDLC device parts */ |
| int netcount; |
| spinlock_t netlock; |
| |
| #if SYNCLINK_GENERIC_HDLC |
| struct net_device *netdev; |
| #endif |
| |
| } SLMP_INFO; |
| |
| #define MGSL_MAGIC 0x5401 |
| |
| /* |
| * define serial signal status change macros |
| */ |
| #define MISCSTATUS_DCD_LATCHED (SerialSignal_DCD<<8) /* indicates change in DCD */ |
| #define MISCSTATUS_RI_LATCHED (SerialSignal_RI<<8) /* indicates change in RI */ |
| #define MISCSTATUS_CTS_LATCHED (SerialSignal_CTS<<8) /* indicates change in CTS */ |
| #define MISCSTATUS_DSR_LATCHED (SerialSignal_DSR<<8) /* change in DSR */ |
| |
| /* Common Register macros */ |
| #define LPR 0x00 |
| #define PABR0 0x02 |
| #define PABR1 0x03 |
| #define WCRL 0x04 |
| #define WCRM 0x05 |
| #define WCRH 0x06 |
| #define DPCR 0x08 |
| #define DMER 0x09 |
| #define ISR0 0x10 |
| #define ISR1 0x11 |
| #define ISR2 0x12 |
| #define IER0 0x14 |
| #define IER1 0x15 |
| #define IER2 0x16 |
| #define ITCR 0x18 |
| #define INTVR 0x1a |
| #define IMVR 0x1c |
| |
| /* MSCI Register macros */ |
| #define TRB 0x20 |
| #define TRBL 0x20 |
| #define TRBH 0x21 |
| #define SR0 0x22 |
| #define SR1 0x23 |
| #define SR2 0x24 |
| #define SR3 0x25 |
| #define FST 0x26 |
| #define IE0 0x28 |
| #define IE1 0x29 |
| #define IE2 0x2a |
| #define FIE 0x2b |
| #define CMD 0x2c |
| #define MD0 0x2e |
| #define MD1 0x2f |
| #define MD2 0x30 |
| #define CTL 0x31 |
| #define SA0 0x32 |
| #define SA1 0x33 |
| #define IDL 0x34 |
| #define TMC 0x35 |
| #define RXS 0x36 |
| #define TXS 0x37 |
| #define TRC0 0x38 |
| #define TRC1 0x39 |
| #define RRC 0x3a |
| #define CST0 0x3c |
| #define CST1 0x3d |
| |
| /* Timer Register Macros */ |
| #define TCNT 0x60 |
| #define TCNTL 0x60 |
| #define TCNTH 0x61 |
| #define TCONR 0x62 |
| #define TCONRL 0x62 |
| #define TCONRH 0x63 |
| #define TMCS 0x64 |
| #define TEPR 0x65 |
| |
| /* DMA Controller Register macros */ |
| #define DARL 0x80 |
| #define DARH 0x81 |
| #define DARB 0x82 |
| #define BAR 0x80 |
| #define BARL 0x80 |
| #define BARH 0x81 |
| #define BARB 0x82 |
| #define SAR 0x84 |
| #define SARL 0x84 |
| #define SARH 0x85 |
| #define SARB 0x86 |
| #define CPB 0x86 |
| #define CDA 0x88 |
| #define CDAL 0x88 |
| #define CDAH 0x89 |
| #define EDA 0x8a |
| #define EDAL 0x8a |
| #define EDAH 0x8b |
| #define BFL 0x8c |
| #define BFLL 0x8c |
| #define BFLH 0x8d |
| #define BCR 0x8e |
| #define BCRL 0x8e |
| #define BCRH 0x8f |
| #define DSR 0x90 |
| #define DMR 0x91 |
| #define FCT 0x93 |
| #define DIR 0x94 |
| #define DCMD 0x95 |
| |
| /* combine with timer or DMA register address */ |
| #define TIMER0 0x00 |
| #define TIMER1 0x08 |
| #define TIMER2 0x10 |
| #define TIMER3 0x18 |
| #define RXDMA 0x00 |
| #define TXDMA 0x20 |
| |
| /* SCA Command Codes */ |
| #define NOOP 0x00 |
| #define TXRESET 0x01 |
| #define TXENABLE 0x02 |
| #define TXDISABLE 0x03 |
| #define TXCRCINIT 0x04 |
| #define TXCRCEXCL 0x05 |
| #define TXEOM 0x06 |
| #define TXABORT 0x07 |
| #define MPON 0x08 |
| #define TXBUFCLR 0x09 |
| #define RXRESET 0x11 |
| #define RXENABLE 0x12 |
| #define RXDISABLE 0x13 |
| #define RXCRCINIT 0x14 |
| #define RXREJECT 0x15 |
| #define SEARCHMP 0x16 |
| #define RXCRCEXCL 0x17 |
| #define RXCRCCALC 0x18 |
| #define CHRESET 0x21 |
| #define HUNT 0x31 |
| |
| /* DMA command codes */ |
| #define SWABORT 0x01 |
| #define FEICLEAR 0x02 |
| |
| /* IE0 */ |
| #define TXINTE BIT7 |
| #define RXINTE BIT6 |
| #define TXRDYE BIT1 |
| #define RXRDYE BIT0 |
| |
| /* IE1 & SR1 */ |
| #define UDRN BIT7 |
| #define IDLE BIT6 |
| #define SYNCD BIT4 |
| #define FLGD BIT4 |
| #define CCTS BIT3 |
| #define CDCD BIT2 |
| #define BRKD BIT1 |
| #define ABTD BIT1 |
| #define GAPD BIT1 |
| #define BRKE BIT0 |
| #define IDLD BIT0 |
| |
| /* IE2 & SR2 */ |
| #define EOM BIT7 |
| #define PMP BIT6 |
| #define SHRT BIT6 |
| #define PE BIT5 |
| #define ABT BIT5 |
| #define FRME BIT4 |
| #define RBIT BIT4 |
| #define OVRN BIT3 |
| #define CRCE BIT2 |
| |
| |
| /* |
| * Global linked list of SyncLink devices |
| */ |
| static SLMP_INFO *synclinkmp_device_list = NULL; |
| static int synclinkmp_adapter_count = -1; |
| static int synclinkmp_device_count = 0; |
| |
| /* |
| * Set this param to non-zero to load eax with the |
| * .text section address and breakpoint on module load. |
| * This is useful for use with gdb and add-symbol-file command. |
| */ |
| static bool break_on_load = 0; |
| |
| /* |
| * Driver major number, defaults to zero to get auto |
| * assigned major number. May be forced as module parameter. |
| */ |
| static int ttymajor = 0; |
| |
| /* |
| * Array of user specified options for ISA adapters. |
| */ |
| static int debug_level = 0; |
| static int maxframe[MAX_DEVICES] = {0,}; |
| |
| module_param(break_on_load, bool, 0); |
| module_param(ttymajor, int, 0); |
| module_param(debug_level, int, 0); |
| module_param_array(maxframe, int, NULL, 0); |
| |
| static char *driver_name = "SyncLink MultiPort driver"; |
| static char *driver_version = "$Revision: 4.38 $"; |
| |
| static int synclinkmp_init_one(struct pci_dev *dev,const struct pci_device_id *ent); |
| static void synclinkmp_remove_one(struct pci_dev *dev); |
| |
| static struct pci_device_id synclinkmp_pci_tbl[] = { |
| { PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_SCA, PCI_ANY_ID, PCI_ANY_ID, }, |
| { 0, }, /* terminate list */ |
| }; |
| MODULE_DEVICE_TABLE(pci, synclinkmp_pci_tbl); |
| |
| MODULE_LICENSE("GPL"); |
| |
| static struct pci_driver synclinkmp_pci_driver = { |
| .name = "synclinkmp", |
| .id_table = synclinkmp_pci_tbl, |
| .probe = synclinkmp_init_one, |
| .remove = __devexit_p(synclinkmp_remove_one), |
| }; |
| |
| |
| static struct tty_driver *serial_driver; |
| |
| /* number of characters left in xmit buffer before we ask for more */ |
| #define WAKEUP_CHARS 256 |
| |
| |
| /* tty callbacks */ |
| |
| static int open(struct tty_struct *tty, struct file * filp); |
| static void close(struct tty_struct *tty, struct file * filp); |
| static void hangup(struct tty_struct *tty); |
| static void set_termios(struct tty_struct *tty, struct ktermios *old_termios); |
| |
| static int write(struct tty_struct *tty, const unsigned char *buf, int count); |
| static int put_char(struct tty_struct *tty, unsigned char ch); |
| static void send_xchar(struct tty_struct *tty, char ch); |
| static void wait_until_sent(struct tty_struct *tty, int timeout); |
| static int write_room(struct tty_struct *tty); |
| static void flush_chars(struct tty_struct *tty); |
| static void flush_buffer(struct tty_struct *tty); |
| static void tx_hold(struct tty_struct *tty); |
| static void tx_release(struct tty_struct *tty); |
| |
| static int ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg); |
| static int chars_in_buffer(struct tty_struct *tty); |
| static void throttle(struct tty_struct * tty); |
| static void unthrottle(struct tty_struct * tty); |
| static int set_break(struct tty_struct *tty, int break_state); |
| |
| #if SYNCLINK_GENERIC_HDLC |
| #define dev_to_port(D) (dev_to_hdlc(D)->priv) |
| static void hdlcdev_tx_done(SLMP_INFO *info); |
| static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size); |
| static int hdlcdev_init(SLMP_INFO *info); |
| static void hdlcdev_exit(SLMP_INFO *info); |
| #endif |
| |
| /* ioctl handlers */ |
| |
| static int get_stats(SLMP_INFO *info, struct mgsl_icount __user *user_icount); |
| static int get_params(SLMP_INFO *info, MGSL_PARAMS __user *params); |
| static int set_params(SLMP_INFO *info, MGSL_PARAMS __user *params); |
| static int get_txidle(SLMP_INFO *info, int __user *idle_mode); |
| static int set_txidle(SLMP_INFO *info, int idle_mode); |
| static int tx_enable(SLMP_INFO *info, int enable); |
| static int tx_abort(SLMP_INFO *info); |
| static int rx_enable(SLMP_INFO *info, int enable); |
| static int modem_input_wait(SLMP_INFO *info,int arg); |
| static int wait_mgsl_event(SLMP_INFO *info, int __user *mask_ptr); |
| static int tiocmget(struct tty_struct *tty); |
| static int tiocmset(struct tty_struct *tty, |
| unsigned int set, unsigned int clear); |
| static int set_break(struct tty_struct *tty, int break_state); |
| |
| static void add_device(SLMP_INFO *info); |
| static void device_init(int adapter_num, struct pci_dev *pdev); |
| static int claim_resources(SLMP_INFO *info); |
| static void release_resources(SLMP_INFO *info); |
| |
| static int startup(SLMP_INFO *info); |
| static int block_til_ready(struct tty_struct *tty, struct file * filp,SLMP_INFO *info); |
| static int carrier_raised(struct tty_port *port); |
| static void shutdown(SLMP_INFO *info); |
| static void program_hw(SLMP_INFO *info); |
| static void change_params(SLMP_INFO *info); |
| |
| static bool init_adapter(SLMP_INFO *info); |
| static bool register_test(SLMP_INFO *info); |
| static bool irq_test(SLMP_INFO *info); |
| static bool loopback_test(SLMP_INFO *info); |
| static int adapter_test(SLMP_INFO *info); |
| static bool memory_test(SLMP_INFO *info); |
| |
| static void reset_adapter(SLMP_INFO *info); |
| static void reset_port(SLMP_INFO *info); |
| static void async_mode(SLMP_INFO *info); |
| static void hdlc_mode(SLMP_INFO *info); |
| |
| static void rx_stop(SLMP_INFO *info); |
| static void rx_start(SLMP_INFO *info); |
| static void rx_reset_buffers(SLMP_INFO *info); |
| static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last); |
| static bool rx_get_frame(SLMP_INFO *info); |
| |
| static void tx_start(SLMP_INFO *info); |
| static void tx_stop(SLMP_INFO *info); |
| static void tx_load_fifo(SLMP_INFO *info); |
| static void tx_set_idle(SLMP_INFO *info); |
| static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count); |
| |
| static void get_signals(SLMP_INFO *info); |
| static void set_signals(SLMP_INFO *info); |
| static void enable_loopback(SLMP_INFO *info, int enable); |
| static void set_rate(SLMP_INFO *info, u32 data_rate); |
| |
| static int bh_action(SLMP_INFO *info); |
| static void bh_handler(struct work_struct *work); |
| static void bh_receive(SLMP_INFO *info); |
| static void bh_transmit(SLMP_INFO *info); |
| static void bh_status(SLMP_INFO *info); |
| static void isr_timer(SLMP_INFO *info); |
| static void isr_rxint(SLMP_INFO *info); |
| static void isr_rxrdy(SLMP_INFO *info); |
| static void isr_txint(SLMP_INFO *info); |
| static void isr_txrdy(SLMP_INFO *info); |
| static void isr_rxdmaok(SLMP_INFO *info); |
| static void isr_rxdmaerror(SLMP_INFO *info); |
| static void isr_txdmaok(SLMP_INFO *info); |
| static void isr_txdmaerror(SLMP_INFO *info); |
| static void isr_io_pin(SLMP_INFO *info, u16 status); |
| |
| static int alloc_dma_bufs(SLMP_INFO *info); |
| static void free_dma_bufs(SLMP_INFO *info); |
| static int alloc_buf_list(SLMP_INFO *info); |
| static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *list, SCADESC_EX *list_ex,int count); |
| static int alloc_tmp_rx_buf(SLMP_INFO *info); |
| static void free_tmp_rx_buf(SLMP_INFO *info); |
| |
| static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count); |
| static void trace_block(SLMP_INFO *info, const char* data, int count, int xmit); |
| static void tx_timeout(unsigned long context); |
| static void status_timeout(unsigned long context); |
| |
| static unsigned char read_reg(SLMP_INFO *info, unsigned char addr); |
| static void write_reg(SLMP_INFO *info, unsigned char addr, unsigned char val); |
| static u16 read_reg16(SLMP_INFO *info, unsigned char addr); |
| static void write_reg16(SLMP_INFO *info, unsigned char addr, u16 val); |
| static unsigned char read_status_reg(SLMP_INFO * info); |
| static void write_control_reg(SLMP_INFO * info); |
| |
| |
| static unsigned char rx_active_fifo_level = 16; // rx request FIFO activation level in bytes |
| static unsigned char tx_active_fifo_level = 16; // tx request FIFO activation level in bytes |
| static unsigned char tx_negate_fifo_level = 32; // tx request FIFO negation level in bytes |
| |
| static u32 misc_ctrl_value = 0x007e4040; |
| static u32 lcr1_brdr_value = 0x00800028; |
| |
| static u32 read_ahead_count = 8; |
| |
| /* DPCR, DMA Priority Control |
| * |
| * 07..05 Not used, must be 0 |
| * 04 BRC, bus release condition: 0=all transfers complete |
| * 1=release after 1 xfer on all channels |
| * 03 CCC, channel change condition: 0=every cycle |
| * 1=after each channel completes all xfers |
| * 02..00 PR<2..0>, priority 100=round robin |
| * |
| * 00000100 = 0x00 |
| */ |
| static unsigned char dma_priority = 0x04; |
| |
| // Number of bytes that can be written to shared RAM |
| // in a single write operation |
| static u32 sca_pci_load_interval = 64; |
| |
| /* |
| * 1st function defined in .text section. Calling this function in |
| * init_module() followed by a breakpoint allows a remote debugger |
| * (gdb) to get the .text address for the add-symbol-file command. |
| * This allows remote debugging of dynamically loadable modules. |
| */ |
| static void* synclinkmp_get_text_ptr(void); |
| static void* synclinkmp_get_text_ptr(void) {return synclinkmp_get_text_ptr;} |
| |
| static inline int sanity_check(SLMP_INFO *info, |
| char *name, const char *routine) |
| { |
| #ifdef SANITY_CHECK |
| static const char *badmagic = |
| "Warning: bad magic number for synclinkmp_struct (%s) in %s\n"; |
| static const char *badinfo = |
| "Warning: null synclinkmp_struct for (%s) in %s\n"; |
| |
| if (!info) { |
| printk(badinfo, name, routine); |
| return 1; |
| } |
| if (info->magic != MGSL_MAGIC) { |
| printk(badmagic, name, routine); |
| return 1; |
| } |
| #else |
| if (!info) |
| return 1; |
| #endif |
| return 0; |
| } |
| |
| /** |
| * line discipline callback wrappers |
| * |
| * The wrappers maintain line discipline references |
| * while calling into the line discipline. |
| * |
| * ldisc_receive_buf - pass receive data to line discipline |
| */ |
| |
| static void ldisc_receive_buf(struct tty_struct *tty, |
| const __u8 *data, char *flags, int count) |
| { |
| struct tty_ldisc *ld; |
| if (!tty) |
| return; |
| ld = tty_ldisc_ref(tty); |
| if (ld) { |
| if (ld->ops->receive_buf) |
| ld->ops->receive_buf(tty, data, flags, count); |
| tty_ldisc_deref(ld); |
| } |
| } |
| |
| /* tty callbacks */ |
| |
| /* Called when a port is opened. Init and enable port. |
| */ |
| static int open(struct tty_struct *tty, struct file *filp) |
| { |
| SLMP_INFO *info; |
| int retval, line; |
| unsigned long flags; |
| |
| line = tty->index; |
| if (line >= synclinkmp_device_count) { |
| printk("%s(%d): open with invalid line #%d.\n", |
| __FILE__,__LINE__,line); |
| return -ENODEV; |
| } |
| |
| info = synclinkmp_device_list; |
| while(info && info->line != line) |
| info = info->next_device; |
| if (sanity_check(info, tty->name, "open")) |
| return -ENODEV; |
| if ( info->init_error ) { |
| printk("%s(%d):%s device is not allocated, init error=%d\n", |
| __FILE__,__LINE__,info->device_name,info->init_error); |
| return -ENODEV; |
| } |
| |
| tty->driver_data = info; |
| info->port.tty = tty; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s open(), old ref count = %d\n", |
| __FILE__,__LINE__,tty->driver->name, info->port.count); |
| |
| /* If port is closing, signal caller to try again */ |
| if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){ |
| if (info->port.flags & ASYNC_CLOSING) |
| interruptible_sleep_on(&info->port.close_wait); |
| retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ? |
| -EAGAIN : -ERESTARTSYS); |
| goto cleanup; |
| } |
| |
| info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0; |
| |
| spin_lock_irqsave(&info->netlock, flags); |
| if (info->netcount) { |
| retval = -EBUSY; |
| spin_unlock_irqrestore(&info->netlock, flags); |
| goto cleanup; |
| } |
| info->port.count++; |
| spin_unlock_irqrestore(&info->netlock, flags); |
| |
| if (info->port.count == 1) { |
| /* 1st open on this device, init hardware */ |
| retval = startup(info); |
| if (retval < 0) |
| goto cleanup; |
| } |
| |
| retval = block_til_ready(tty, filp, info); |
| if (retval) { |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s block_til_ready() returned %d\n", |
| __FILE__,__LINE__, info->device_name, retval); |
| goto cleanup; |
| } |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s open() success\n", |
| __FILE__,__LINE__, info->device_name); |
| retval = 0; |
| |
| cleanup: |
| if (retval) { |
| if (tty->count == 1) |
| info->port.tty = NULL; /* tty layer will release tty struct */ |
| if(info->port.count) |
| info->port.count--; |
| } |
| |
| return retval; |
| } |
| |
| /* Called when port is closed. Wait for remaining data to be |
| * sent. Disable port and free resources. |
| */ |
| static void close(struct tty_struct *tty, struct file *filp) |
| { |
| SLMP_INFO * info = tty->driver_data; |
| |
| if (sanity_check(info, tty->name, "close")) |
| return; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s close() entry, count=%d\n", |
| __FILE__,__LINE__, info->device_name, info->port.count); |
| |
| if (tty_port_close_start(&info->port, tty, filp) == 0) |
| goto cleanup; |
| |
| mutex_lock(&info->port.mutex); |
| if (info->port.flags & ASYNC_INITIALIZED) |
| wait_until_sent(tty, info->timeout); |
| |
| flush_buffer(tty); |
| tty_ldisc_flush(tty); |
| shutdown(info); |
| mutex_unlock(&info->port.mutex); |
| |
| tty_port_close_end(&info->port, tty); |
| info->port.tty = NULL; |
| cleanup: |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s close() exit, count=%d\n", __FILE__,__LINE__, |
| tty->driver->name, info->port.count); |
| } |
| |
| /* Called by tty_hangup() when a hangup is signaled. |
| * This is the same as closing all open descriptors for the port. |
| */ |
| static void hangup(struct tty_struct *tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s hangup()\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| if (sanity_check(info, tty->name, "hangup")) |
| return; |
| |
| mutex_lock(&info->port.mutex); |
| flush_buffer(tty); |
| shutdown(info); |
| |
| spin_lock_irqsave(&info->port.lock, flags); |
| info->port.count = 0; |
| info->port.flags &= ~ASYNC_NORMAL_ACTIVE; |
| info->port.tty = NULL; |
| spin_unlock_irqrestore(&info->port.lock, flags); |
| mutex_unlock(&info->port.mutex); |
| |
| wake_up_interruptible(&info->port.open_wait); |
| } |
| |
| /* Set new termios settings |
| */ |
| static void set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s set_termios()\n", __FILE__,__LINE__, |
| tty->driver->name ); |
| |
| change_params(info); |
| |
| /* Handle transition to B0 status */ |
| if (old_termios->c_cflag & CBAUD && |
| !(tty->termios->c_cflag & CBAUD)) { |
| info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); |
| spin_lock_irqsave(&info->lock,flags); |
| set_signals(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| |
| /* Handle transition away from B0 status */ |
| if (!(old_termios->c_cflag & CBAUD) && |
| tty->termios->c_cflag & CBAUD) { |
| info->serial_signals |= SerialSignal_DTR; |
| if (!(tty->termios->c_cflag & CRTSCTS) || |
| !test_bit(TTY_THROTTLED, &tty->flags)) { |
| info->serial_signals |= SerialSignal_RTS; |
| } |
| spin_lock_irqsave(&info->lock,flags); |
| set_signals(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| |
| /* Handle turning off CRTSCTS */ |
| if (old_termios->c_cflag & CRTSCTS && |
| !(tty->termios->c_cflag & CRTSCTS)) { |
| tty->hw_stopped = 0; |
| tx_release(tty); |
| } |
| } |
| |
| /* Send a block of data |
| * |
| * Arguments: |
| * |
| * tty pointer to tty information structure |
| * buf pointer to buffer containing send data |
| * count size of send data in bytes |
| * |
| * Return Value: number of characters written |
| */ |
| static int write(struct tty_struct *tty, |
| const unsigned char *buf, int count) |
| { |
| int c, ret = 0; |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s write() count=%d\n", |
| __FILE__,__LINE__,info->device_name,count); |
| |
| if (sanity_check(info, tty->name, "write")) |
| goto cleanup; |
| |
| if (!info->tx_buf) |
| goto cleanup; |
| |
| if (info->params.mode == MGSL_MODE_HDLC) { |
| if (count > info->max_frame_size) { |
| ret = -EIO; |
| goto cleanup; |
| } |
| if (info->tx_active) |
| goto cleanup; |
| if (info->tx_count) { |
| /* send accumulated data from send_char() calls */ |
| /* as frame and wait before accepting more data. */ |
| tx_load_dma_buffer(info, info->tx_buf, info->tx_count); |
| goto start; |
| } |
| ret = info->tx_count = count; |
| tx_load_dma_buffer(info, buf, count); |
| goto start; |
| } |
| |
| for (;;) { |
| c = min_t(int, count, |
| min(info->max_frame_size - info->tx_count - 1, |
| info->max_frame_size - info->tx_put)); |
| if (c <= 0) |
| break; |
| |
| memcpy(info->tx_buf + info->tx_put, buf, c); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| info->tx_put += c; |
| if (info->tx_put >= info->max_frame_size) |
| info->tx_put -= info->max_frame_size; |
| info->tx_count += c; |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| buf += c; |
| count -= c; |
| ret += c; |
| } |
| |
| if (info->params.mode == MGSL_MODE_HDLC) { |
| if (count) { |
| ret = info->tx_count = 0; |
| goto cleanup; |
| } |
| tx_load_dma_buffer(info, info->tx_buf, info->tx_count); |
| } |
| start: |
| if (info->tx_count && !tty->stopped && !tty->hw_stopped) { |
| spin_lock_irqsave(&info->lock,flags); |
| if (!info->tx_active) |
| tx_start(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| |
| cleanup: |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk( "%s(%d):%s write() returning=%d\n", |
| __FILE__,__LINE__,info->device_name,ret); |
| return ret; |
| } |
| |
| /* Add a character to the transmit buffer. |
| */ |
| static int put_char(struct tty_struct *tty, unsigned char ch) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| int ret = 0; |
| |
| if ( debug_level >= DEBUG_LEVEL_INFO ) { |
| printk( "%s(%d):%s put_char(%d)\n", |
| __FILE__,__LINE__,info->device_name,ch); |
| } |
| |
| if (sanity_check(info, tty->name, "put_char")) |
| return 0; |
| |
| if (!info->tx_buf) |
| return 0; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| |
| if ( (info->params.mode != MGSL_MODE_HDLC) || |
| !info->tx_active ) { |
| |
| if (info->tx_count < info->max_frame_size - 1) { |
| info->tx_buf[info->tx_put++] = ch; |
| if (info->tx_put >= info->max_frame_size) |
| info->tx_put -= info->max_frame_size; |
| info->tx_count++; |
| ret = 1; |
| } |
| } |
| |
| spin_unlock_irqrestore(&info->lock,flags); |
| return ret; |
| } |
| |
| /* Send a high-priority XON/XOFF character |
| */ |
| static void send_xchar(struct tty_struct *tty, char ch) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s send_xchar(%d)\n", |
| __FILE__,__LINE__, info->device_name, ch ); |
| |
| if (sanity_check(info, tty->name, "send_xchar")) |
| return; |
| |
| info->x_char = ch; |
| if (ch) { |
| /* Make sure transmit interrupts are on */ |
| spin_lock_irqsave(&info->lock,flags); |
| if (!info->tx_enabled) |
| tx_start(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| } |
| |
| /* Wait until the transmitter is empty. |
| */ |
| static void wait_until_sent(struct tty_struct *tty, int timeout) |
| { |
| SLMP_INFO * info = tty->driver_data; |
| unsigned long orig_jiffies, char_time; |
| |
| if (!info ) |
| return; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s wait_until_sent() entry\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| if (sanity_check(info, tty->name, "wait_until_sent")) |
| return; |
| |
| if (!test_bit(ASYNCB_INITIALIZED, &info->port.flags)) |
| goto exit; |
| |
| orig_jiffies = jiffies; |
| |
| /* Set check interval to 1/5 of estimated time to |
| * send a character, and make it at least 1. The check |
| * interval should also be less than the timeout. |
| * Note: use tight timings here to satisfy the NIST-PCTS. |
| */ |
| |
| if ( info->params.data_rate ) { |
| char_time = info->timeout/(32 * 5); |
| if (!char_time) |
| char_time++; |
| } else |
| char_time = 1; |
| |
| if (timeout) |
| char_time = min_t(unsigned long, char_time, timeout); |
| |
| if ( info->params.mode == MGSL_MODE_HDLC ) { |
| while (info->tx_active) { |
| msleep_interruptible(jiffies_to_msecs(char_time)); |
| if (signal_pending(current)) |
| break; |
| if (timeout && time_after(jiffies, orig_jiffies + timeout)) |
| break; |
| } |
| } else { |
| /* |
| * TODO: determine if there is something similar to USC16C32 |
| * TXSTATUS_ALL_SENT status |
| */ |
| while ( info->tx_active && info->tx_enabled) { |
| msleep_interruptible(jiffies_to_msecs(char_time)); |
| if (signal_pending(current)) |
| break; |
| if (timeout && time_after(jiffies, orig_jiffies + timeout)) |
| break; |
| } |
| } |
| |
| exit: |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s wait_until_sent() exit\n", |
| __FILE__,__LINE__, info->device_name ); |
| } |
| |
| /* Return the count of free bytes in transmit buffer |
| */ |
| static int write_room(struct tty_struct *tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| int ret; |
| |
| if (sanity_check(info, tty->name, "write_room")) |
| return 0; |
| |
| if (info->params.mode == MGSL_MODE_HDLC) { |
| ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE; |
| } else { |
| ret = info->max_frame_size - info->tx_count - 1; |
| if (ret < 0) |
| ret = 0; |
| } |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s write_room()=%d\n", |
| __FILE__, __LINE__, info->device_name, ret); |
| |
| return ret; |
| } |
| |
| /* enable transmitter and send remaining buffered characters |
| */ |
| static void flush_chars(struct tty_struct *tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk( "%s(%d):%s flush_chars() entry tx_count=%d\n", |
| __FILE__,__LINE__,info->device_name,info->tx_count); |
| |
| if (sanity_check(info, tty->name, "flush_chars")) |
| return; |
| |
| if (info->tx_count <= 0 || tty->stopped || tty->hw_stopped || |
| !info->tx_buf) |
| return; |
| |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk( "%s(%d):%s flush_chars() entry, starting transmitter\n", |
| __FILE__,__LINE__,info->device_name ); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| |
| if (!info->tx_active) { |
| if ( (info->params.mode == MGSL_MODE_HDLC) && |
| info->tx_count ) { |
| /* operating in synchronous (frame oriented) mode */ |
| /* copy data from circular tx_buf to */ |
| /* transmit DMA buffer. */ |
| tx_load_dma_buffer(info, |
| info->tx_buf,info->tx_count); |
| } |
| tx_start(info); |
| } |
| |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| |
| /* Discard all data in the send buffer |
| */ |
| static void flush_buffer(struct tty_struct *tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s flush_buffer() entry\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| if (sanity_check(info, tty->name, "flush_buffer")) |
| return; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| info->tx_count = info->tx_put = info->tx_get = 0; |
| del_timer(&info->tx_timer); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| tty_wakeup(tty); |
| } |
| |
| /* throttle (stop) transmitter |
| */ |
| static void tx_hold(struct tty_struct *tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (sanity_check(info, tty->name, "tx_hold")) |
| return; |
| |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk("%s(%d):%s tx_hold()\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| if (info->tx_enabled) |
| tx_stop(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| |
| /* release (start) transmitter |
| */ |
| static void tx_release(struct tty_struct *tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (sanity_check(info, tty->name, "tx_release")) |
| return; |
| |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk("%s(%d):%s tx_release()\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| if (!info->tx_enabled) |
| tx_start(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| |
| /* Service an IOCTL request |
| * |
| * Arguments: |
| * |
| * tty pointer to tty instance data |
| * cmd IOCTL command code |
| * arg command argument/context |
| * |
| * Return Value: 0 if success, otherwise error code |
| */ |
| static int ioctl(struct tty_struct *tty, |
| unsigned int cmd, unsigned long arg) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| void __user *argp = (void __user *)arg; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s ioctl() cmd=%08X\n", __FILE__,__LINE__, |
| info->device_name, cmd ); |
| |
| if (sanity_check(info, tty->name, "ioctl")) |
| return -ENODEV; |
| |
| if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && |
| (cmd != TIOCMIWAIT)) { |
| if (tty->flags & (1 << TTY_IO_ERROR)) |
| return -EIO; |
| } |
| |
| switch (cmd) { |
| case MGSL_IOCGPARAMS: |
| return get_params(info, argp); |
| case MGSL_IOCSPARAMS: |
| return set_params(info, argp); |
| case MGSL_IOCGTXIDLE: |
| return get_txidle(info, argp); |
| case MGSL_IOCSTXIDLE: |
| return set_txidle(info, (int)arg); |
| case MGSL_IOCTXENABLE: |
| return tx_enable(info, (int)arg); |
| case MGSL_IOCRXENABLE: |
| return rx_enable(info, (int)arg); |
| case MGSL_IOCTXABORT: |
| return tx_abort(info); |
| case MGSL_IOCGSTATS: |
| return get_stats(info, argp); |
| case MGSL_IOCWAITEVENT: |
| return wait_mgsl_event(info, argp); |
| case MGSL_IOCLOOPTXDONE: |
| return 0; // TODO: Not supported, need to document |
| /* Wait for modem input (DCD,RI,DSR,CTS) change |
| * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS) |
| */ |
| case TIOCMIWAIT: |
| return modem_input_wait(info,(int)arg); |
| |
| /* |
| * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) |
| * Return: write counters to the user passed counter struct |
| * NB: both 1->0 and 0->1 transitions are counted except for |
| * RI where only 0->1 is counted. |
| */ |
| default: |
| return -ENOIOCTLCMD; |
| } |
| return 0; |
| } |
| |
| static int get_icount(struct tty_struct *tty, |
| struct serial_icounter_struct *icount) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| struct mgsl_icount cnow; /* kernel counter temps */ |
| unsigned long flags; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| cnow = info->icount; |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| icount->cts = cnow.cts; |
| icount->dsr = cnow.dsr; |
| icount->rng = cnow.rng; |
| icount->dcd = cnow.dcd; |
| icount->rx = cnow.rx; |
| icount->tx = cnow.tx; |
| icount->frame = cnow.frame; |
| icount->overrun = cnow.overrun; |
| icount->parity = cnow.parity; |
| icount->brk = cnow.brk; |
| icount->buf_overrun = cnow.buf_overrun; |
| |
| return 0; |
| } |
| |
| /* |
| * /proc fs routines.... |
| */ |
| |
| static inline void line_info(struct seq_file *m, SLMP_INFO *info) |
| { |
| char stat_buf[30]; |
| unsigned long flags; |
| |
| seq_printf(m, "%s: SCABase=%08x Mem=%08X StatusControl=%08x LCR=%08X\n" |
| "\tIRQ=%d MaxFrameSize=%u\n", |
| info->device_name, |
| info->phys_sca_base, |
| info->phys_memory_base, |
| info->phys_statctrl_base, |
| info->phys_lcr_base, |
| info->irq_level, |
| info->max_frame_size ); |
| |
| /* output current serial signal states */ |
| spin_lock_irqsave(&info->lock,flags); |
| get_signals(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| stat_buf[0] = 0; |
| stat_buf[1] = 0; |
| if (info->serial_signals & SerialSignal_RTS) |
| strcat(stat_buf, "|RTS"); |
| if (info->serial_signals & SerialSignal_CTS) |
| strcat(stat_buf, "|CTS"); |
| if (info->serial_signals & SerialSignal_DTR) |
| strcat(stat_buf, "|DTR"); |
| if (info->serial_signals & SerialSignal_DSR) |
| strcat(stat_buf, "|DSR"); |
| if (info->serial_signals & SerialSignal_DCD) |
| strcat(stat_buf, "|CD"); |
| if (info->serial_signals & SerialSignal_RI) |
| strcat(stat_buf, "|RI"); |
| |
| if (info->params.mode == MGSL_MODE_HDLC) { |
| seq_printf(m, "\tHDLC txok:%d rxok:%d", |
| info->icount.txok, info->icount.rxok); |
| if (info->icount.txunder) |
| seq_printf(m, " txunder:%d", info->icount.txunder); |
| if (info->icount.txabort) |
| seq_printf(m, " txabort:%d", info->icount.txabort); |
| if (info->icount.rxshort) |
| seq_printf(m, " rxshort:%d", info->icount.rxshort); |
| if (info->icount.rxlong) |
| seq_printf(m, " rxlong:%d", info->icount.rxlong); |
| if (info->icount.rxover) |
| seq_printf(m, " rxover:%d", info->icount.rxover); |
| if (info->icount.rxcrc) |
| seq_printf(m, " rxlong:%d", info->icount.rxcrc); |
| } else { |
| seq_printf(m, "\tASYNC tx:%d rx:%d", |
| info->icount.tx, info->icount.rx); |
| if (info->icount.frame) |
| seq_printf(m, " fe:%d", info->icount.frame); |
| if (info->icount.parity) |
| seq_printf(m, " pe:%d", info->icount.parity); |
| if (info->icount.brk) |
| seq_printf(m, " brk:%d", info->icount.brk); |
| if (info->icount.overrun) |
| seq_printf(m, " oe:%d", info->icount.overrun); |
| } |
| |
| /* Append serial signal status to end */ |
| seq_printf(m, " %s\n", stat_buf+1); |
| |
| seq_printf(m, "\ttxactive=%d bh_req=%d bh_run=%d pending_bh=%x\n", |
| info->tx_active,info->bh_requested,info->bh_running, |
| info->pending_bh); |
| } |
| |
| /* Called to print information about devices |
| */ |
| static int synclinkmp_proc_show(struct seq_file *m, void *v) |
| { |
| SLMP_INFO *info; |
| |
| seq_printf(m, "synclinkmp driver:%s\n", driver_version); |
| |
| info = synclinkmp_device_list; |
| while( info ) { |
| line_info(m, info); |
| info = info->next_device; |
| } |
| return 0; |
| } |
| |
| static int synclinkmp_proc_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, synclinkmp_proc_show, NULL); |
| } |
| |
| static const struct file_operations synclinkmp_proc_fops = { |
| .owner = THIS_MODULE, |
| .open = synclinkmp_proc_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| /* Return the count of bytes in transmit buffer |
| */ |
| static int chars_in_buffer(struct tty_struct *tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| |
| if (sanity_check(info, tty->name, "chars_in_buffer")) |
| return 0; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s chars_in_buffer()=%d\n", |
| __FILE__, __LINE__, info->device_name, info->tx_count); |
| |
| return info->tx_count; |
| } |
| |
| /* Signal remote device to throttle send data (our receive data) |
| */ |
| static void throttle(struct tty_struct * tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s throttle() entry\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| if (sanity_check(info, tty->name, "throttle")) |
| return; |
| |
| if (I_IXOFF(tty)) |
| send_xchar(tty, STOP_CHAR(tty)); |
| |
| if (tty->termios->c_cflag & CRTSCTS) { |
| spin_lock_irqsave(&info->lock,flags); |
| info->serial_signals &= ~SerialSignal_RTS; |
| set_signals(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| } |
| |
| /* Signal remote device to stop throttling send data (our receive data) |
| */ |
| static void unthrottle(struct tty_struct * tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s unthrottle() entry\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| if (sanity_check(info, tty->name, "unthrottle")) |
| return; |
| |
| if (I_IXOFF(tty)) { |
| if (info->x_char) |
| info->x_char = 0; |
| else |
| send_xchar(tty, START_CHAR(tty)); |
| } |
| |
| if (tty->termios->c_cflag & CRTSCTS) { |
| spin_lock_irqsave(&info->lock,flags); |
| info->serial_signals |= SerialSignal_RTS; |
| set_signals(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| } |
| |
| /* set or clear transmit break condition |
| * break_state -1=set break condition, 0=clear |
| */ |
| static int set_break(struct tty_struct *tty, int break_state) |
| { |
| unsigned char RegValue; |
| SLMP_INFO * info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s set_break(%d)\n", |
| __FILE__,__LINE__, info->device_name, break_state); |
| |
| if (sanity_check(info, tty->name, "set_break")) |
| return -EINVAL; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| RegValue = read_reg(info, CTL); |
| if (break_state == -1) |
| RegValue |= BIT3; |
| else |
| RegValue &= ~BIT3; |
| write_reg(info, CTL, RegValue); |
| spin_unlock_irqrestore(&info->lock,flags); |
| return 0; |
| } |
| |
| #if SYNCLINK_GENERIC_HDLC |
| |
| /** |
| * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.) |
| * set encoding and frame check sequence (FCS) options |
| * |
| * dev pointer to network device structure |
| * encoding serial encoding setting |
| * parity FCS setting |
| * |
| * returns 0 if success, otherwise error code |
| */ |
| static int hdlcdev_attach(struct net_device *dev, unsigned short encoding, |
| unsigned short parity) |
| { |
| SLMP_INFO *info = dev_to_port(dev); |
| unsigned char new_encoding; |
| unsigned short new_crctype; |
| |
| /* return error if TTY interface open */ |
| if (info->port.count) |
| return -EBUSY; |
| |
| switch (encoding) |
| { |
| case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break; |
| case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break; |
| case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break; |
| case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break; |
| case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break; |
| default: return -EINVAL; |
| } |
| |
| switch (parity) |
| { |
| case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break; |
| case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break; |
| case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break; |
| default: return -EINVAL; |
| } |
| |
| info->params.encoding = new_encoding; |
| info->params.crc_type = new_crctype; |
| |
| /* if network interface up, reprogram hardware */ |
| if (info->netcount) |
| program_hw(info); |
| |
| return 0; |
| } |
| |
| /** |
| * called by generic HDLC layer to send frame |
| * |
| * skb socket buffer containing HDLC frame |
| * dev pointer to network device structure |
| */ |
| static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb, |
| struct net_device *dev) |
| { |
| SLMP_INFO *info = dev_to_port(dev); |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name); |
| |
| /* stop sending until this frame completes */ |
| netif_stop_queue(dev); |
| |
| /* copy data to device buffers */ |
| info->tx_count = skb->len; |
| tx_load_dma_buffer(info, skb->data, skb->len); |
| |
| /* update network statistics */ |
| dev->stats.tx_packets++; |
| dev->stats.tx_bytes += skb->len; |
| |
| /* done with socket buffer, so free it */ |
| dev_kfree_skb(skb); |
| |
| /* save start time for transmit timeout detection */ |
| dev->trans_start = jiffies; |
| |
| /* start hardware transmitter if necessary */ |
| spin_lock_irqsave(&info->lock,flags); |
| if (!info->tx_active) |
| tx_start(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| return NETDEV_TX_OK; |
| } |
| |
| /** |
| * called by network layer when interface enabled |
| * claim resources and initialize hardware |
| * |
| * dev pointer to network device structure |
| * |
| * returns 0 if success, otherwise error code |
| */ |
| static int hdlcdev_open(struct net_device *dev) |
| { |
| SLMP_INFO *info = dev_to_port(dev); |
| int rc; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name); |
| |
| /* generic HDLC layer open processing */ |
| if ((rc = hdlc_open(dev))) |
| return rc; |
| |
| /* arbitrate between network and tty opens */ |
| spin_lock_irqsave(&info->netlock, flags); |
| if (info->port.count != 0 || info->netcount != 0) { |
| printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name); |
| spin_unlock_irqrestore(&info->netlock, flags); |
| return -EBUSY; |
| } |
| info->netcount=1; |
| spin_unlock_irqrestore(&info->netlock, flags); |
| |
| /* claim resources and init adapter */ |
| if ((rc = startup(info)) != 0) { |
| spin_lock_irqsave(&info->netlock, flags); |
| info->netcount=0; |
| spin_unlock_irqrestore(&info->netlock, flags); |
| return rc; |
| } |
| |
| /* assert DTR and RTS, apply hardware settings */ |
| info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; |
| program_hw(info); |
| |
| /* enable network layer transmit */ |
| dev->trans_start = jiffies; |
| netif_start_queue(dev); |
| |
| /* inform generic HDLC layer of current DCD status */ |
| spin_lock_irqsave(&info->lock, flags); |
| get_signals(info); |
| spin_unlock_irqrestore(&info->lock, flags); |
| if (info->serial_signals & SerialSignal_DCD) |
| netif_carrier_on(dev); |
| else |
| netif_carrier_off(dev); |
| return 0; |
| } |
| |
| /** |
| * called by network layer when interface is disabled |
| * shutdown hardware and release resources |
| * |
| * dev pointer to network device structure |
| * |
| * returns 0 if success, otherwise error code |
| */ |
| static int hdlcdev_close(struct net_device *dev) |
| { |
| SLMP_INFO *info = dev_to_port(dev); |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name); |
| |
| netif_stop_queue(dev); |
| |
| /* shutdown adapter and release resources */ |
| shutdown(info); |
| |
| hdlc_close(dev); |
| |
| spin_lock_irqsave(&info->netlock, flags); |
| info->netcount=0; |
| spin_unlock_irqrestore(&info->netlock, flags); |
| |
| return 0; |
| } |
| |
| /** |
| * called by network layer to process IOCTL call to network device |
| * |
| * dev pointer to network device structure |
| * ifr pointer to network interface request structure |
| * cmd IOCTL command code |
| * |
| * returns 0 if success, otherwise error code |
| */ |
| static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| { |
| const size_t size = sizeof(sync_serial_settings); |
| sync_serial_settings new_line; |
| sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync; |
| SLMP_INFO *info = dev_to_port(dev); |
| unsigned int flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name); |
| |
| /* return error if TTY interface open */ |
| if (info->port.count) |
| return -EBUSY; |
| |
| if (cmd != SIOCWANDEV) |
| return hdlc_ioctl(dev, ifr, cmd); |
| |
| switch(ifr->ifr_settings.type) { |
| case IF_GET_IFACE: /* return current sync_serial_settings */ |
| |
| ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL; |
| if (ifr->ifr_settings.size < size) { |
| ifr->ifr_settings.size = size; /* data size wanted */ |
| return -ENOBUFS; |
| } |
| |
| flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); |
| |
| switch (flags){ |
| case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break; |
| case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break; |
| case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break; |
| case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break; |
| default: new_line.clock_type = CLOCK_DEFAULT; |
| } |
| |
| new_line.clock_rate = info->params.clock_speed; |
| new_line.loopback = info->params.loopback ? 1:0; |
| |
| if (copy_to_user(line, &new_line, size)) |
| return -EFAULT; |
| return 0; |
| |
| case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */ |
| |
| if(!capable(CAP_NET_ADMIN)) |
| return -EPERM; |
| if (copy_from_user(&new_line, line, size)) |
| return -EFAULT; |
| |
| switch (new_line.clock_type) |
| { |
| case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break; |
| case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break; |
| case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break; |
| case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break; |
| case CLOCK_DEFAULT: flags = info->params.flags & |
| (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break; |
| default: return -EINVAL; |
| } |
| |
| if (new_line.loopback != 0 && new_line.loopback != 1) |
| return -EINVAL; |
| |
| info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | |
| HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | |
| HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | |
| HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); |
| info->params.flags |= flags; |
| |
| info->params.loopback = new_line.loopback; |
| |
| if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG)) |
| info->params.clock_speed = new_line.clock_rate; |
| else |
| info->params.clock_speed = 0; |
| |
| /* if network interface up, reprogram hardware */ |
| if (info->netcount) |
| program_hw(info); |
| return 0; |
| |
| default: |
| return hdlc_ioctl(dev, ifr, cmd); |
| } |
| } |
| |
| /** |
| * called by network layer when transmit timeout is detected |
| * |
| * dev pointer to network device structure |
| */ |
| static void hdlcdev_tx_timeout(struct net_device *dev) |
| { |
| SLMP_INFO *info = dev_to_port(dev); |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("hdlcdev_tx_timeout(%s)\n",dev->name); |
| |
| dev->stats.tx_errors++; |
| dev->stats.tx_aborted_errors++; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| tx_stop(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| netif_wake_queue(dev); |
| } |
| |
| /** |
| * called by device driver when transmit completes |
| * reenable network layer transmit if stopped |
| * |
| * info pointer to device instance information |
| */ |
| static void hdlcdev_tx_done(SLMP_INFO *info) |
| { |
| if (netif_queue_stopped(info->netdev)) |
| netif_wake_queue(info->netdev); |
| } |
| |
| /** |
| * called by device driver when frame received |
| * pass frame to network layer |
| * |
| * info pointer to device instance information |
| * buf pointer to buffer contianing frame data |
| * size count of data bytes in buf |
| */ |
| static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size) |
| { |
| struct sk_buff *skb = dev_alloc_skb(size); |
| struct net_device *dev = info->netdev; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("hdlcdev_rx(%s)\n",dev->name); |
| |
| if (skb == NULL) { |
| printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", |
| dev->name); |
| dev->stats.rx_dropped++; |
| return; |
| } |
| |
| memcpy(skb_put(skb, size), buf, size); |
| |
| skb->protocol = hdlc_type_trans(skb, dev); |
| |
| dev->stats.rx_packets++; |
| dev->stats.rx_bytes += size; |
| |
| netif_rx(skb); |
| } |
| |
| static const struct net_device_ops hdlcdev_ops = { |
| .ndo_open = hdlcdev_open, |
| .ndo_stop = hdlcdev_close, |
| .ndo_change_mtu = hdlc_change_mtu, |
| .ndo_start_xmit = hdlc_start_xmit, |
| .ndo_do_ioctl = hdlcdev_ioctl, |
| .ndo_tx_timeout = hdlcdev_tx_timeout, |
| }; |
| |
| /** |
| * called by device driver when adding device instance |
| * do generic HDLC initialization |
| * |
| * info pointer to device instance information |
| * |
| * returns 0 if success, otherwise error code |
| */ |
| static int hdlcdev_init(SLMP_INFO *info) |
| { |
| int rc; |
| struct net_device *dev; |
| hdlc_device *hdlc; |
| |
| /* allocate and initialize network and HDLC layer objects */ |
| |
| if (!(dev = alloc_hdlcdev(info))) { |
| printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__); |
| return -ENOMEM; |
| } |
| |
| /* for network layer reporting purposes only */ |
| dev->mem_start = info->phys_sca_base; |
| dev->mem_end = info->phys_sca_base + SCA_BASE_SIZE - 1; |
| dev->irq = info->irq_level; |
| |
| /* network layer callbacks and settings */ |
| dev->netdev_ops = &hdlcdev_ops; |
| dev->watchdog_timeo = 10 * HZ; |
| dev->tx_queue_len = 50; |
| |
| /* generic HDLC layer callbacks and settings */ |
| hdlc = dev_to_hdlc(dev); |
| hdlc->attach = hdlcdev_attach; |
| hdlc->xmit = hdlcdev_xmit; |
| |
| /* register objects with HDLC layer */ |
| if ((rc = register_hdlc_device(dev))) { |
| printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__); |
| free_netdev(dev); |
| return rc; |
| } |
| |
| info->netdev = dev; |
| return 0; |
| } |
| |
| /** |
| * called by device driver when removing device instance |
| * do generic HDLC cleanup |
| * |
| * info pointer to device instance information |
| */ |
| static void hdlcdev_exit(SLMP_INFO *info) |
| { |
| unregister_hdlc_device(info->netdev); |
| free_netdev(info->netdev); |
| info->netdev = NULL; |
| } |
| |
| #endif /* CONFIG_HDLC */ |
| |
| |
| /* Return next bottom half action to perform. |
| * Return Value: BH action code or 0 if nothing to do. |
| */ |
| static int bh_action(SLMP_INFO *info) |
| { |
| unsigned long flags; |
| int rc = 0; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| |
| if (info->pending_bh & BH_RECEIVE) { |
| info->pending_bh &= ~BH_RECEIVE; |
| rc = BH_RECEIVE; |
| } else if (info->pending_bh & BH_TRANSMIT) { |
| info->pending_bh &= ~BH_TRANSMIT; |
| rc = BH_TRANSMIT; |
| } else if (info->pending_bh & BH_STATUS) { |
| info->pending_bh &= ~BH_STATUS; |
| rc = BH_STATUS; |
| } |
| |
| if (!rc) { |
| /* Mark BH routine as complete */ |
| info->bh_running = false; |
| info->bh_requested = false; |
| } |
| |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| return rc; |
| } |
| |
| /* Perform bottom half processing of work items queued by ISR. |
| */ |
| static void bh_handler(struct work_struct *work) |
| { |
| SLMP_INFO *info = container_of(work, SLMP_INFO, task); |
| int action; |
| |
| if (!info) |
| return; |
| |
| if ( debug_level >= DEBUG_LEVEL_BH ) |
| printk( "%s(%d):%s bh_handler() entry\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| info->bh_running = true; |
| |
| while((action = bh_action(info)) != 0) { |
| |
| /* Process work item */ |
| if ( debug_level >= DEBUG_LEVEL_BH ) |
| printk( "%s(%d):%s bh_handler() work item action=%d\n", |
| __FILE__,__LINE__,info->device_name, action); |
| |
| switch (action) { |
| |
| case BH_RECEIVE: |
| bh_receive(info); |
| break; |
| case BH_TRANSMIT: |
| bh_transmit(info); |
| break; |
| case BH_STATUS: |
| bh_status(info); |
| break; |
| default: |
| /* unknown work item ID */ |
| printk("%s(%d):%s Unknown work item ID=%08X!\n", |
| __FILE__,__LINE__,info->device_name,action); |
| break; |
| } |
| } |
| |
| if ( debug_level >= DEBUG_LEVEL_BH ) |
| printk( "%s(%d):%s bh_handler() exit\n", |
| __FILE__,__LINE__,info->device_name); |
| } |
| |
| static void bh_receive(SLMP_INFO *info) |
| { |
| if ( debug_level >= DEBUG_LEVEL_BH ) |
| printk( "%s(%d):%s bh_receive()\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| while( rx_get_frame(info) ); |
| } |
| |
| static void bh_transmit(SLMP_INFO *info) |
| { |
| struct tty_struct *tty = info->port.tty; |
| |
| if ( debug_level >= DEBUG_LEVEL_BH ) |
| printk( "%s(%d):%s bh_transmit() entry\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| if (tty) |
| tty_wakeup(tty); |
| } |
| |
| static void bh_status(SLMP_INFO *info) |
| { |
| if ( debug_level >= DEBUG_LEVEL_BH ) |
| printk( "%s(%d):%s bh_status() entry\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| info->ri_chkcount = 0; |
| info->dsr_chkcount = 0; |
| info->dcd_chkcount = 0; |
| info->cts_chkcount = 0; |
| } |
| |
| static void isr_timer(SLMP_INFO * info) |
| { |
| unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0; |
| |
| /* IER2<7..4> = timer<3..0> interrupt enables (0=disabled) */ |
| write_reg(info, IER2, 0); |
| |
| /* TMCS, Timer Control/Status Register |
| * |
| * 07 CMF, Compare match flag (read only) 1=match |
| * 06 ECMI, CMF Interrupt Enable: 0=disabled |
| * 05 Reserved, must be 0 |
| * 04 TME, Timer Enable |
| * 03..00 Reserved, must be 0 |
| * |
| * 0000 0000 |
| */ |
| write_reg(info, (unsigned char)(timer + TMCS), 0); |
| |
| info->irq_occurred = true; |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_timer()\n", |
| __FILE__,__LINE__,info->device_name); |
| } |
| |
| static void isr_rxint(SLMP_INFO * info) |
| { |
| struct tty_struct *tty = info->port.tty; |
| struct mgsl_icount *icount = &info->icount; |
| unsigned char status = read_reg(info, SR1) & info->ie1_value & (FLGD + IDLD + CDCD + BRKD); |
| unsigned char status2 = read_reg(info, SR2) & info->ie2_value & OVRN; |
| |
| /* clear status bits */ |
| if (status) |
| write_reg(info, SR1, status); |
| |
| if (status2) |
| write_reg(info, SR2, status2); |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_rxint status=%02X %02x\n", |
| __FILE__,__LINE__,info->device_name,status,status2); |
| |
| if (info->params.mode == MGSL_MODE_ASYNC) { |
| if (status & BRKD) { |
| icount->brk++; |
| |
| /* process break detection if tty control |
| * is not set to ignore it |
| */ |
| if ( tty ) { |
| if (!(status & info->ignore_status_mask1)) { |
| if (info->read_status_mask1 & BRKD) { |
| tty_insert_flip_char(tty, 0, TTY_BREAK); |
| if (info->port.flags & ASYNC_SAK) |
| do_SAK(tty); |
| } |
| } |
| } |
| } |
| } |
| else { |
| if (status & (FLGD|IDLD)) { |
| if (status & FLGD) |
| info->icount.exithunt++; |
| else if (status & IDLD) |
| info->icount.rxidle++; |
| wake_up_interruptible(&info->event_wait_q); |
| } |
| } |
| |
| if (status & CDCD) { |
| /* simulate a common modem status change interrupt |
| * for our handler |
| */ |
| get_signals( info ); |
| isr_io_pin(info, |
| MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD)); |
| } |
| } |
| |
| /* |
| * handle async rx data interrupts |
| */ |
| static void isr_rxrdy(SLMP_INFO * info) |
| { |
| u16 status; |
| unsigned char DataByte; |
| struct tty_struct *tty = info->port.tty; |
| struct mgsl_icount *icount = &info->icount; |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_rxrdy\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| while((status = read_reg(info,CST0)) & BIT0) |
| { |
| int flag = 0; |
| bool over = false; |
| DataByte = read_reg(info,TRB); |
| |
| icount->rx++; |
| |
| if ( status & (PE + FRME + OVRN) ) { |
| printk("%s(%d):%s rxerr=%04X\n", |
| __FILE__,__LINE__,info->device_name,status); |
| |
| /* update error statistics */ |
| if (status & PE) |
| icount->parity++; |
| else if (status & FRME) |
| icount->frame++; |
| else if (status & OVRN) |
| icount->overrun++; |
| |
| /* discard char if tty control flags say so */ |
| if (status & info->ignore_status_mask2) |
| continue; |
| |
| status &= info->read_status_mask2; |
| |
| if ( tty ) { |
| if (status & PE) |
| flag = TTY_PARITY; |
| else if (status & FRME) |
| flag = TTY_FRAME; |
| if (status & OVRN) { |
| /* Overrun is special, since it's |
| * reported immediately, and doesn't |
| * affect the current character |
| */ |
| over = true; |
| } |
| } |
| } /* end of if (error) */ |
| |
| if ( tty ) { |
| tty_insert_flip_char(tty, DataByte, flag); |
| if (over) |
| tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
| } |
| } |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) { |
| printk("%s(%d):%s rx=%d brk=%d parity=%d frame=%d overrun=%d\n", |
| __FILE__,__LINE__,info->device_name, |
| icount->rx,icount->brk,icount->parity, |
| icount->frame,icount->overrun); |
| } |
| |
| if ( tty ) |
| tty_flip_buffer_push(tty); |
| } |
| |
| static void isr_txeom(SLMP_INFO * info, unsigned char status) |
| { |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_txeom status=%02x\n", |
| __FILE__,__LINE__,info->device_name,status); |
| |
| write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */ |
| write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */ |
| write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ |
| |
| if (status & UDRN) { |
| write_reg(info, CMD, TXRESET); |
| write_reg(info, CMD, TXENABLE); |
| } else |
| write_reg(info, CMD, TXBUFCLR); |
| |
| /* disable and clear tx interrupts */ |
| info->ie0_value &= ~TXRDYE; |
| info->ie1_value &= ~(IDLE + UDRN); |
| write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value)); |
| write_reg(info, SR1, (unsigned char)(UDRN + IDLE)); |
| |
| if ( info->tx_active ) { |
| if (info->params.mode != MGSL_MODE_ASYNC) { |
| if (status & UDRN) |
| info->icount.txunder++; |
| else if (status & IDLE) |
| info->icount.txok++; |
| } |
| |
| info->tx_active = false; |
| info->tx_count = info->tx_put = info->tx_get = 0; |
| |
| del_timer(&info->tx_timer); |
| |
| if (info->params.mode != MGSL_MODE_ASYNC && info->drop_rts_on_tx_done ) { |
| info->serial_signals &= ~SerialSignal_RTS; |
| info->drop_rts_on_tx_done = false; |
| set_signals(info); |
| } |
| |
| #if SYNCLINK_GENERIC_HDLC |
| if (info->netcount) |
| hdlcdev_tx_done(info); |
| else |
| #endif |
| { |
| if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) { |
| tx_stop(info); |
| return; |
| } |
| info->pending_bh |= BH_TRANSMIT; |
| } |
| } |
| } |
| |
| |
| /* |
| * handle tx status interrupts |
| */ |
| static void isr_txint(SLMP_INFO * info) |
| { |
| unsigned char status = read_reg(info, SR1) & info->ie1_value & (UDRN + IDLE + CCTS); |
| |
| /* clear status bits */ |
| write_reg(info, SR1, status); |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_txint status=%02x\n", |
| __FILE__,__LINE__,info->device_name,status); |
| |
| if (status & (UDRN + IDLE)) |
| isr_txeom(info, status); |
| |
| if (status & CCTS) { |
| /* simulate a common modem status change interrupt |
| * for our handler |
| */ |
| get_signals( info ); |
| isr_io_pin(info, |
| MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS)); |
| |
| } |
| } |
| |
| /* |
| * handle async tx data interrupts |
| */ |
| static void isr_txrdy(SLMP_INFO * info) |
| { |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_txrdy() tx_count=%d\n", |
| __FILE__,__LINE__,info->device_name,info->tx_count); |
| |
| if (info->params.mode != MGSL_MODE_ASYNC) { |
| /* disable TXRDY IRQ, enable IDLE IRQ */ |
| info->ie0_value &= ~TXRDYE; |
| info->ie1_value |= IDLE; |
| write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value)); |
| return; |
| } |
| |
| if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) { |
| tx_stop(info); |
| return; |
| } |
| |
| if ( info->tx_count ) |
| tx_load_fifo( info ); |
| else { |
| info->tx_active = false; |
| info->ie0_value &= ~TXRDYE; |
| write_reg(info, IE0, info->ie0_value); |
| } |
| |
| if (info->tx_count < WAKEUP_CHARS) |
| info->pending_bh |= BH_TRANSMIT; |
| } |
| |
| static void isr_rxdmaok(SLMP_INFO * info) |
| { |
| /* BIT7 = EOT (end of transfer) |
| * BIT6 = EOM (end of message/frame) |
| */ |
| unsigned char status = read_reg(info,RXDMA + DSR) & 0xc0; |
| |
| /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */ |
| write_reg(info, RXDMA + DSR, (unsigned char)(status | 1)); |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_rxdmaok(), status=%02x\n", |
| __FILE__,__LINE__,info->device_name,status); |
| |
| info->pending_bh |= BH_RECEIVE; |
| } |
| |
| static void isr_rxdmaerror(SLMP_INFO * info) |
| { |
| /* BIT5 = BOF (buffer overflow) |
| * BIT4 = COF (counter overflow) |
| */ |
| unsigned char status = read_reg(info,RXDMA + DSR) & 0x30; |
| |
| /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */ |
| write_reg(info, RXDMA + DSR, (unsigned char)(status | 1)); |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_rxdmaerror(), status=%02x\n", |
| __FILE__,__LINE__,info->device_name,status); |
| |
| info->rx_overflow = true; |
| info->pending_bh |= BH_RECEIVE; |
| } |
| |
| static void isr_txdmaok(SLMP_INFO * info) |
| { |
| unsigned char status_reg1 = read_reg(info, SR1); |
| |
| write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */ |
| write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */ |
| write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_txdmaok(), status=%02x\n", |
| __FILE__,__LINE__,info->device_name,status_reg1); |
| |
| /* program TXRDY as FIFO empty flag, enable TXRDY IRQ */ |
| write_reg16(info, TRC0, 0); |
| info->ie0_value |= TXRDYE; |
| write_reg(info, IE0, info->ie0_value); |
| } |
| |
| static void isr_txdmaerror(SLMP_INFO * info) |
| { |
| /* BIT5 = BOF (buffer overflow) |
| * BIT4 = COF (counter overflow) |
| */ |
| unsigned char status = read_reg(info,TXDMA + DSR) & 0x30; |
| |
| /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */ |
| write_reg(info, TXDMA + DSR, (unsigned char)(status | 1)); |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s isr_txdmaerror(), status=%02x\n", |
| __FILE__,__LINE__,info->device_name,status); |
| } |
| |
| /* handle input serial signal changes |
| */ |
| static void isr_io_pin( SLMP_INFO *info, u16 status ) |
| { |
| struct mgsl_icount *icount; |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):isr_io_pin status=%04X\n", |
| __FILE__,__LINE__,status); |
| |
| if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED | |
| MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) { |
| icount = &info->icount; |
| /* update input line counters */ |
| if (status & MISCSTATUS_RI_LATCHED) { |
| icount->rng++; |
| if ( status & SerialSignal_RI ) |
| info->input_signal_events.ri_up++; |
| else |
| info->input_signal_events.ri_down++; |
| } |
| if (status & MISCSTATUS_DSR_LATCHED) { |
| icount->dsr++; |
| if ( status & SerialSignal_DSR ) |
| info->input_signal_events.dsr_up++; |
| else |
| info->input_signal_events.dsr_down++; |
| } |
| if (status & MISCSTATUS_DCD_LATCHED) { |
| if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) { |
| info->ie1_value &= ~CDCD; |
| write_reg(info, IE1, info->ie1_value); |
| } |
| icount->dcd++; |
| if (status & SerialSignal_DCD) { |
| info->input_signal_events.dcd_up++; |
| } else |
| info->input_signal_events.dcd_down++; |
| #if SYNCLINK_GENERIC_HDLC |
| if (info->netcount) { |
| if (status & SerialSignal_DCD) |
| netif_carrier_on(info->netdev); |
| else |
| netif_carrier_off(info->netdev); |
| } |
| #endif |
| } |
| if (status & MISCSTATUS_CTS_LATCHED) |
| { |
| if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) { |
| info->ie1_value &= ~CCTS; |
| write_reg(info, IE1, info->ie1_value); |
| } |
| icount->cts++; |
| if ( status & SerialSignal_CTS ) |
| info->input_signal_events.cts_up++; |
| else |
| info->input_signal_events.cts_down++; |
| } |
| wake_up_interruptible(&info->status_event_wait_q); |
| wake_up_interruptible(&info->event_wait_q); |
| |
| if ( (info->port.flags & ASYNC_CHECK_CD) && |
| (status & MISCSTATUS_DCD_LATCHED) ) { |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s CD now %s...", info->device_name, |
| (status & SerialSignal_DCD) ? "on" : "off"); |
| if (status & SerialSignal_DCD) |
| wake_up_interruptible(&info->port.open_wait); |
| else { |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("doing serial hangup..."); |
| if (info->port.tty) |
| tty_hangup(info->port.tty); |
| } |
| } |
| |
| if ( (info->port.flags & ASYNC_CTS_FLOW) && |
| (status & MISCSTATUS_CTS_LATCHED) ) { |
| if ( info->port.tty ) { |
| if (info->port.tty->hw_stopped) { |
| if (status & SerialSignal_CTS) { |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("CTS tx start..."); |
| info->port.tty->hw_stopped = 0; |
| tx_start(info); |
| info->pending_bh |= BH_TRANSMIT; |
| return; |
| } |
| } else { |
| if (!(status & SerialSignal_CTS)) { |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("CTS tx stop..."); |
| info->port.tty->hw_stopped = 1; |
| tx_stop(info); |
| } |
| } |
| } |
| } |
| } |
| |
| info->pending_bh |= BH_STATUS; |
| } |
| |
| /* Interrupt service routine entry point. |
| * |
| * Arguments: |
| * irq interrupt number that caused interrupt |
| * dev_id device ID supplied during interrupt registration |
| * regs interrupted processor context |
| */ |
| static irqreturn_t synclinkmp_interrupt(int dummy, void *dev_id) |
| { |
| SLMP_INFO *info = dev_id; |
| unsigned char status, status0, status1=0; |
| unsigned char dmastatus, dmastatus0, dmastatus1=0; |
| unsigned char timerstatus0, timerstatus1=0; |
| unsigned char shift; |
| unsigned int i; |
| unsigned short tmp; |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk(KERN_DEBUG "%s(%d): synclinkmp_interrupt(%d)entry.\n", |
| __FILE__, __LINE__, info->irq_level); |
| |
| spin_lock(&info->lock); |
| |
| for(;;) { |
| |
| /* get status for SCA0 (ports 0-1) */ |
| tmp = read_reg16(info, ISR0); /* get ISR0 and ISR1 in one read */ |
| status0 = (unsigned char)tmp; |
| dmastatus0 = (unsigned char)(tmp>>8); |
| timerstatus0 = read_reg(info, ISR2); |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk(KERN_DEBUG "%s(%d):%s status0=%02x, dmastatus0=%02x, timerstatus0=%02x\n", |
| __FILE__, __LINE__, info->device_name, |
| status0, dmastatus0, timerstatus0); |
| |
| if (info->port_count == 4) { |
| /* get status for SCA1 (ports 2-3) */ |
| tmp = read_reg16(info->port_array[2], ISR0); |
| status1 = (unsigned char)tmp; |
| dmastatus1 = (unsigned char)(tmp>>8); |
| timerstatus1 = read_reg(info->port_array[2], ISR2); |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s status1=%02x, dmastatus1=%02x, timerstatus1=%02x\n", |
| __FILE__,__LINE__,info->device_name, |
| status1,dmastatus1,timerstatus1); |
| } |
| |
| if (!status0 && !dmastatus0 && !timerstatus0 && |
| !status1 && !dmastatus1 && !timerstatus1) |
| break; |
| |
| for(i=0; i < info->port_count ; i++) { |
| if (info->port_array[i] == NULL) |
| continue; |
| if (i < 2) { |
| status = status0; |
| dmastatus = dmastatus0; |
| } else { |
| status = status1; |
| dmastatus = dmastatus1; |
| } |
| |
| shift = i & 1 ? 4 :0; |
| |
| if (status & BIT0 << shift) |
| isr_rxrdy(info->port_array[i]); |
| if (status & BIT1 << shift) |
| isr_txrdy(info->port_array[i]); |
| if (status & BIT2 << shift) |
| isr_rxint(info->port_array[i]); |
| if (status & BIT3 << shift) |
| isr_txint(info->port_array[i]); |
| |
| if (dmastatus & BIT0 << shift) |
| isr_rxdmaerror(info->port_array[i]); |
| if (dmastatus & BIT1 << shift) |
| isr_rxdmaok(info->port_array[i]); |
| if (dmastatus & BIT2 << shift) |
| isr_txdmaerror(info->port_array[i]); |
| if (dmastatus & BIT3 << shift) |
| isr_txdmaok(info->port_array[i]); |
| } |
| |
| if (timerstatus0 & (BIT5 | BIT4)) |
| isr_timer(info->port_array[0]); |
| if (timerstatus0 & (BIT7 | BIT6)) |
| isr_timer(info->port_array[1]); |
| if (timerstatus1 & (BIT5 | BIT4)) |
| isr_timer(info->port_array[2]); |
| if (timerstatus1 & (BIT7 | BIT6)) |
| isr_timer(info->port_array[3]); |
| } |
| |
| for(i=0; i < info->port_count ; i++) { |
| SLMP_INFO * port = info->port_array[i]; |
| |
| /* Request bottom half processing if there's something |
| * for it to do and the bh is not already running. |
| * |
| * Note: startup adapter diags require interrupts. |
| * do not request bottom half processing if the |
| * device is not open in a normal mode. |
| */ |
| if ( port && (port->port.count || port->netcount) && |
| port->pending_bh && !port->bh_running && |
| !port->bh_requested ) { |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk("%s(%d):%s queueing bh task.\n", |
| __FILE__,__LINE__,port->device_name); |
| schedule_work(&port->task); |
| port->bh_requested = true; |
| } |
| } |
| |
| spin_unlock(&info->lock); |
| |
| if ( debug_level >= DEBUG_LEVEL_ISR ) |
| printk(KERN_DEBUG "%s(%d):synclinkmp_interrupt(%d)exit.\n", |
| __FILE__, __LINE__, info->irq_level); |
| return IRQ_HANDLED; |
| } |
| |
| /* Initialize and start device. |
| */ |
| static int startup(SLMP_INFO * info) |
| { |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk("%s(%d):%s tx_releaseup()\n",__FILE__,__LINE__,info->device_name); |
| |
| if (info->port.flags & ASYNC_INITIALIZED) |
| return 0; |
| |
| if (!info->tx_buf) { |
| info->tx_buf = kmalloc(info->max_frame_size, GFP_KERNEL); |
| if (!info->tx_buf) { |
| printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n", |
| __FILE__,__LINE__,info->device_name); |
| return -ENOMEM; |
| } |
| } |
| |
| info->pending_bh = 0; |
| |
| memset(&info->icount, 0, sizeof(info->icount)); |
| |
| /* program hardware for current parameters */ |
| reset_port(info); |
| |
| change_params(info); |
| |
| mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10)); |
| |
| if (info->port.tty) |
| clear_bit(TTY_IO_ERROR, &info->port.tty->flags); |
| |
| info->port.flags |= ASYNC_INITIALIZED; |
| |
| return 0; |
| } |
| |
| /* Called by close() and hangup() to shutdown hardware |
| */ |
| static void shutdown(SLMP_INFO * info) |
| { |
| unsigned long flags; |
| |
| if (!(info->port.flags & ASYNC_INITIALIZED)) |
| return; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s synclinkmp_shutdown()\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| /* clear status wait queue because status changes */ |
| /* can't happen after shutting down the hardware */ |
| wake_up_interruptible(&info->status_event_wait_q); |
| wake_up_interruptible(&info->event_wait_q); |
| |
| del_timer(&info->tx_timer); |
| del_timer(&info->status_timer); |
| |
| kfree(info->tx_buf); |
| info->tx_buf = NULL; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| |
| reset_port(info); |
| |
| if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) { |
| info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); |
| set_signals(info); |
| } |
| |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| if (info->port.tty) |
| set_bit(TTY_IO_ERROR, &info->port.tty->flags); |
| |
| info->port.flags &= ~ASYNC_INITIALIZED; |
| } |
| |
| static void program_hw(SLMP_INFO *info) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| |
| rx_stop(info); |
| tx_stop(info); |
| |
| info->tx_count = info->tx_put = info->tx_get = 0; |
| |
| if (info->params.mode == MGSL_MODE_HDLC || info->netcount) |
| hdlc_mode(info); |
| else |
| async_mode(info); |
| |
| set_signals(info); |
| |
| info->dcd_chkcount = 0; |
| info->cts_chkcount = 0; |
| info->ri_chkcount = 0; |
| info->dsr_chkcount = 0; |
| |
| info->ie1_value |= (CDCD|CCTS); |
| write_reg(info, IE1, info->ie1_value); |
| |
| get_signals(info); |
| |
| if (info->netcount || (info->port.tty && info->port.tty->termios->c_cflag & CREAD) ) |
| rx_start(info); |
| |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| |
| /* Reconfigure adapter based on new parameters |
| */ |
| static void change_params(SLMP_INFO *info) |
| { |
| unsigned cflag; |
| int bits_per_char; |
| |
| if (!info->port.tty || !info->port.tty->termios) |
| return; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s change_params()\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| cflag = info->port.tty->termios->c_cflag; |
| |
| /* if B0 rate (hangup) specified then negate DTR and RTS */ |
| /* otherwise assert DTR and RTS */ |
| if (cflag & CBAUD) |
| info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; |
| else |
| info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); |
| |
| /* byte size and parity */ |
| |
| switch (cflag & CSIZE) { |
| case CS5: info->params.data_bits = 5; break; |
| case CS6: info->params.data_bits = 6; break; |
| case CS7: info->params.data_bits = 7; break; |
| case CS8: info->params.data_bits = 8; break; |
| /* Never happens, but GCC is too dumb to figure it out */ |
| default: info->params.data_bits = 7; break; |
| } |
| |
| if (cflag & CSTOPB) |
| info->params.stop_bits = 2; |
| else |
| info->params.stop_bits = 1; |
| |
| info->params.parity = ASYNC_PARITY_NONE; |
| if (cflag & PARENB) { |
| if (cflag & PARODD) |
| info->params.parity = ASYNC_PARITY_ODD; |
| else |
| info->params.parity = ASYNC_PARITY_EVEN; |
| #ifdef CMSPAR |
| if (cflag & CMSPAR) |
| info->params.parity = ASYNC_PARITY_SPACE; |
| #endif |
| } |
| |
| /* calculate number of jiffies to transmit a full |
| * FIFO (32 bytes) at specified data rate |
| */ |
| bits_per_char = info->params.data_bits + |
| info->params.stop_bits + 1; |
| |
| /* if port data rate is set to 460800 or less then |
| * allow tty settings to override, otherwise keep the |
| * current data rate. |
| */ |
| if (info->params.data_rate <= 460800) { |
| info->params.data_rate = tty_get_baud_rate(info->port.tty); |
| } |
| |
| if ( info->params.data_rate ) { |
| info->timeout = (32*HZ*bits_per_char) / |
| info->params.data_rate; |
| } |
| info->timeout += HZ/50; /* Add .02 seconds of slop */ |
| |
| if (cflag & CRTSCTS) |
| info->port.flags |= ASYNC_CTS_FLOW; |
| else |
| info->port.flags &= ~ASYNC_CTS_FLOW; |
| |
| if (cflag & CLOCAL) |
| info->port.flags &= ~ASYNC_CHECK_CD; |
| else |
| info->port.flags |= ASYNC_CHECK_CD; |
| |
| /* process tty input control flags */ |
| |
| info->read_status_mask2 = OVRN; |
| if (I_INPCK(info->port.tty)) |
| info->read_status_mask2 |= PE | FRME; |
| if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty)) |
| info->read_status_mask1 |= BRKD; |
| if (I_IGNPAR(info->port.tty)) |
| info->ignore_status_mask2 |= PE | FRME; |
| if (I_IGNBRK(info->port.tty)) { |
| info->ignore_status_mask1 |= BRKD; |
| /* If ignoring parity and break indicators, ignore |
| * overruns too. (For real raw support). |
| */ |
| if (I_IGNPAR(info->port.tty)) |
| info->ignore_status_mask2 |= OVRN; |
| } |
| |
| program_hw(info); |
| } |
| |
| static int get_stats(SLMP_INFO * info, struct mgsl_icount __user *user_icount) |
| { |
| int err; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s get_params()\n", |
| __FILE__,__LINE__, info->device_name); |
| |
| if (!user_icount) { |
| memset(&info->icount, 0, sizeof(info->icount)); |
| } else { |
| mutex_lock(&info->port.mutex); |
| COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount)); |
| mutex_unlock(&info->port.mutex); |
| if (err) |
| return -EFAULT; |
| } |
| |
| return 0; |
| } |
| |
| static int get_params(SLMP_INFO * info, MGSL_PARAMS __user *user_params) |
| { |
| int err; |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s get_params()\n", |
| __FILE__,__LINE__, info->device_name); |
| |
| mutex_lock(&info->port.mutex); |
| COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS)); |
| mutex_unlock(&info->port.mutex); |
| if (err) { |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk( "%s(%d):%s get_params() user buffer copy failed\n", |
| __FILE__,__LINE__,info->device_name); |
| return -EFAULT; |
| } |
| |
| return 0; |
| } |
| |
| static int set_params(SLMP_INFO * info, MGSL_PARAMS __user *new_params) |
| { |
| unsigned long flags; |
| MGSL_PARAMS tmp_params; |
| int err; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s set_params\n", |
| __FILE__,__LINE__,info->device_name ); |
| COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS)); |
| if (err) { |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk( "%s(%d):%s set_params() user buffer copy failed\n", |
| __FILE__,__LINE__,info->device_name); |
| return -EFAULT; |
| } |
| |
| mutex_lock(&info->port.mutex); |
| spin_lock_irqsave(&info->lock,flags); |
| memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| change_params(info); |
| mutex_unlock(&info->port.mutex); |
| |
| return 0; |
| } |
| |
| static int get_txidle(SLMP_INFO * info, int __user *idle_mode) |
| { |
| int err; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s get_txidle()=%d\n", |
| __FILE__,__LINE__, info->device_name, info->idle_mode); |
| |
| COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int)); |
| if (err) { |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk( "%s(%d):%s get_txidle() user buffer copy failed\n", |
| __FILE__,__LINE__,info->device_name); |
| return -EFAULT; |
| } |
| |
| return 0; |
| } |
| |
| static int set_txidle(SLMP_INFO * info, int idle_mode) |
| { |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s set_txidle(%d)\n", |
| __FILE__,__LINE__,info->device_name, idle_mode ); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| info->idle_mode = idle_mode; |
| tx_set_idle( info ); |
| spin_unlock_irqrestore(&info->lock,flags); |
| return 0; |
| } |
| |
| static int tx_enable(SLMP_INFO * info, int enable) |
| { |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s tx_enable(%d)\n", |
| __FILE__,__LINE__,info->device_name, enable); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| if ( enable ) { |
| if ( !info->tx_enabled ) { |
| tx_start(info); |
| } |
| } else { |
| if ( info->tx_enabled ) |
| tx_stop(info); |
| } |
| spin_unlock_irqrestore(&info->lock,flags); |
| return 0; |
| } |
| |
| /* abort send HDLC frame |
| */ |
| static int tx_abort(SLMP_INFO * info) |
| { |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s tx_abort()\n", |
| __FILE__,__LINE__,info->device_name); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC ) { |
| info->ie1_value &= ~UDRN; |
| info->ie1_value |= IDLE; |
| write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */ |
| write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */ |
| |
| write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */ |
| write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ |
| |
| write_reg(info, CMD, TXABORT); |
| } |
| spin_unlock_irqrestore(&info->lock,flags); |
| return 0; |
| } |
| |
| static int rx_enable(SLMP_INFO * info, int enable) |
| { |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s rx_enable(%d)\n", |
| __FILE__,__LINE__,info->device_name,enable); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| if ( enable ) { |
| if ( !info->rx_enabled ) |
| rx_start(info); |
| } else { |
| if ( info->rx_enabled ) |
| rx_stop(info); |
| } |
| spin_unlock_irqrestore(&info->lock,flags); |
| return 0; |
| } |
| |
| /* wait for specified event to occur |
| */ |
| static int wait_mgsl_event(SLMP_INFO * info, int __user *mask_ptr) |
| { |
| unsigned long flags; |
| int s; |
| int rc=0; |
| struct mgsl_icount cprev, cnow; |
| int events; |
| int mask; |
| struct _input_signal_events oldsigs, newsigs; |
| DECLARE_WAITQUEUE(wait, current); |
| |
| COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int)); |
| if (rc) { |
| return -EFAULT; |
| } |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s wait_mgsl_event(%d)\n", |
| __FILE__,__LINE__,info->device_name,mask); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| |
| /* return immediately if state matches requested events */ |
| get_signals(info); |
| s = info->serial_signals; |
| |
| events = mask & |
| ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) + |
| ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) + |
| ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) + |
| ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) ); |
| if (events) { |
| spin_unlock_irqrestore(&info->lock,flags); |
| goto exit; |
| } |
| |
| /* save current irq counts */ |
| cprev = info->icount; |
| oldsigs = info->input_signal_events; |
| |
| /* enable hunt and idle irqs if needed */ |
| if (mask & (MgslEvent_ExitHuntMode+MgslEvent_IdleReceived)) { |
| unsigned char oldval = info->ie1_value; |
| unsigned char newval = oldval + |
| (mask & MgslEvent_ExitHuntMode ? FLGD:0) + |
| (mask & MgslEvent_IdleReceived ? IDLD:0); |
| if ( oldval != newval ) { |
| info->ie1_value = newval; |
| write_reg(info, IE1, info->ie1_value); |
| } |
| } |
| |
| set_current_state(TASK_INTERRUPTIBLE); |
| add_wait_queue(&info->event_wait_q, &wait); |
| |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| for(;;) { |
| schedule(); |
| if (signal_pending(current)) { |
| rc = -ERESTARTSYS; |
| break; |
| } |
| |
| /* get current irq counts */ |
| spin_lock_irqsave(&info->lock,flags); |
| cnow = info->icount; |
| newsigs = info->input_signal_events; |
| set_current_state(TASK_INTERRUPTIBLE); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| /* if no change, wait aborted for some reason */ |
| if (newsigs.dsr_up == oldsigs.dsr_up && |
| newsigs.dsr_down == oldsigs.dsr_down && |
| newsigs.dcd_up == oldsigs.dcd_up && |
| newsigs.dcd_down == oldsigs.dcd_down && |
| newsigs.cts_up == oldsigs.cts_up && |
| newsigs.cts_down == oldsigs.cts_down && |
| newsigs.ri_up == oldsigs.ri_up && |
| newsigs.ri_down == oldsigs.ri_down && |
| cnow.exithunt == cprev.exithunt && |
| cnow.rxidle == cprev.rxidle) { |
| rc = -EIO; |
| break; |
| } |
| |
| events = mask & |
| ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) + |
| (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) + |
| (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) + |
| (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) + |
| (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) + |
| (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) + |
| (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) + |
| (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) + |
| (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) + |
| (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) ); |
| if (events) |
| break; |
| |
| cprev = cnow; |
| oldsigs = newsigs; |
| } |
| |
| remove_wait_queue(&info->event_wait_q, &wait); |
| set_current_state(TASK_RUNNING); |
| |
| |
| if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) { |
| spin_lock_irqsave(&info->lock,flags); |
| if (!waitqueue_active(&info->event_wait_q)) { |
| /* disable enable exit hunt mode/idle rcvd IRQs */ |
| info->ie1_value &= ~(FLGD|IDLD); |
| write_reg(info, IE1, info->ie1_value); |
| } |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| exit: |
| if ( rc == 0 ) |
| PUT_USER(rc, events, mask_ptr); |
| |
| return rc; |
| } |
| |
| static int modem_input_wait(SLMP_INFO *info,int arg) |
| { |
| unsigned long flags; |
| int rc; |
| struct mgsl_icount cprev, cnow; |
| DECLARE_WAITQUEUE(wait, current); |
| |
| /* save current irq counts */ |
| spin_lock_irqsave(&info->lock,flags); |
| cprev = info->icount; |
| add_wait_queue(&info->status_event_wait_q, &wait); |
| set_current_state(TASK_INTERRUPTIBLE); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| for(;;) { |
| schedule(); |
| if (signal_pending(current)) { |
| rc = -ERESTARTSYS; |
| break; |
| } |
| |
| /* get new irq counts */ |
| spin_lock_irqsave(&info->lock,flags); |
| cnow = info->icount; |
| set_current_state(TASK_INTERRUPTIBLE); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| /* if no change, wait aborted for some reason */ |
| if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && |
| cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) { |
| rc = -EIO; |
| break; |
| } |
| |
| /* check for change in caller specified modem input */ |
| if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) || |
| (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) || |
| (arg & TIOCM_CD && cnow.dcd != cprev.dcd) || |
| (arg & TIOCM_CTS && cnow.cts != cprev.cts)) { |
| rc = 0; |
| break; |
| } |
| |
| cprev = cnow; |
| } |
| remove_wait_queue(&info->status_event_wait_q, &wait); |
| set_current_state(TASK_RUNNING); |
| return rc; |
| } |
| |
| /* return the state of the serial control and status signals |
| */ |
| static int tiocmget(struct tty_struct *tty) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned int result; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| get_signals(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) + |
| ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) + |
| ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) + |
| ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) + |
| ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) + |
| ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0); |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s tiocmget() value=%08X\n", |
| __FILE__,__LINE__, info->device_name, result ); |
| return result; |
| } |
| |
| /* set modem control signals (DTR/RTS) |
| */ |
| static int tiocmset(struct tty_struct *tty, |
| unsigned int set, unsigned int clear) |
| { |
| SLMP_INFO *info = tty->driver_data; |
| unsigned long flags; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s tiocmset(%x,%x)\n", |
| __FILE__,__LINE__,info->device_name, set, clear); |
| |
| if (set & TIOCM_RTS) |
| info->serial_signals |= SerialSignal_RTS; |
| if (set & TIOCM_DTR) |
| info->serial_signals |= SerialSignal_DTR; |
| if (clear & TIOCM_RTS) |
| info->serial_signals &= ~SerialSignal_RTS; |
| if (clear & TIOCM_DTR) |
| info->serial_signals &= ~SerialSignal_DTR; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| set_signals(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| return 0; |
| } |
| |
| static int carrier_raised(struct tty_port *port) |
| { |
| SLMP_INFO *info = container_of(port, SLMP_INFO, port); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| get_signals(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| return (info->serial_signals & SerialSignal_DCD) ? 1 : 0; |
| } |
| |
| static void dtr_rts(struct tty_port *port, int on) |
| { |
| SLMP_INFO *info = container_of(port, SLMP_INFO, port); |
| unsigned long flags; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| if (on) |
| info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; |
| else |
| info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); |
| set_signals(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| |
| /* Block the current process until the specified port is ready to open. |
| */ |
| static int block_til_ready(struct tty_struct *tty, struct file *filp, |
| SLMP_INFO *info) |
| { |
| DECLARE_WAITQUEUE(wait, current); |
| int retval; |
| bool do_clocal = false; |
| bool extra_count = false; |
| unsigned long flags; |
| int cd; |
| struct tty_port *port = &info->port; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s block_til_ready()\n", |
| __FILE__,__LINE__, tty->driver->name ); |
| |
| if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){ |
| /* nonblock mode is set or port is not enabled */ |
| /* just verify that callout device is not active */ |
| port->flags |= ASYNC_NORMAL_ACTIVE; |
| return 0; |
| } |
| |
| if (tty->termios->c_cflag & CLOCAL) |
| do_clocal = true; |
| |
| /* Wait for carrier detect and the line to become |
| * free (i.e., not in use by the callout). While we are in |
| * this loop, port->count is dropped by one, so that |
| * close() knows when to free things. We restore it upon |
| * exit, either normal or abnormal. |
| */ |
| |
| retval = 0; |
| add_wait_queue(&port->open_wait, &wait); |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s block_til_ready() before block, count=%d\n", |
| __FILE__,__LINE__, tty->driver->name, port->count ); |
| |
| spin_lock_irqsave(&info->lock, flags); |
| if (!tty_hung_up_p(filp)) { |
| extra_count = true; |
| port->count--; |
| } |
| spin_unlock_irqrestore(&info->lock, flags); |
| port->blocked_open++; |
| |
| while (1) { |
| if (tty->termios->c_cflag & CBAUD) |
| tty_port_raise_dtr_rts(port); |
| |
| set_current_state(TASK_INTERRUPTIBLE); |
| |
| if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){ |
| retval = (port->flags & ASYNC_HUP_NOTIFY) ? |
| -EAGAIN : -ERESTARTSYS; |
| break; |
| } |
| |
| cd = tty_port_carrier_raised(port); |
| |
| if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd)) |
| break; |
| |
| if (signal_pending(current)) { |
| retval = -ERESTARTSYS; |
| break; |
| } |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s block_til_ready() count=%d\n", |
| __FILE__,__LINE__, tty->driver->name, port->count ); |
| |
| tty_unlock(); |
| schedule(); |
| tty_lock(); |
| } |
| |
| set_current_state(TASK_RUNNING); |
| remove_wait_queue(&port->open_wait, &wait); |
| |
| if (extra_count) |
| port->count++; |
| port->blocked_open--; |
| |
| if (debug_level >= DEBUG_LEVEL_INFO) |
| printk("%s(%d):%s block_til_ready() after, count=%d\n", |
| __FILE__,__LINE__, tty->driver->name, port->count ); |
| |
| if (!retval) |
| port->flags |= ASYNC_NORMAL_ACTIVE; |
| |
| return retval; |
| } |
| |
| static int alloc_dma_bufs(SLMP_INFO *info) |
| { |
| unsigned short BuffersPerFrame; |
| unsigned short BufferCount; |
| |
| // Force allocation to start at 64K boundary for each port. |
| // This is necessary because *all* buffer descriptors for a port |
| // *must* be in the same 64K block. All descriptors on a port |
| // share a common 'base' address (upper 8 bits of 24 bits) programmed |
| // into the CBP register. |
| info->port_array[0]->last_mem_alloc = (SCA_MEM_SIZE/4) * info->port_num; |
| |
| /* Calculate the number of DMA buffers necessary to hold the */ |
| /* largest allowable frame size. Note: If the max frame size is */ |
| /* not an even multiple of the DMA buffer size then we need to */ |
| /* round the buffer count per frame up one. */ |
| |
| BuffersPerFrame = (unsigned short)(info->max_frame_size/SCABUFSIZE); |
| if ( info->max_frame_size % SCABUFSIZE ) |
| BuffersPerFrame++; |
| |
| /* calculate total number of data buffers (SCABUFSIZE) possible |
| * in one ports memory (SCA_MEM_SIZE/4) after allocating memory |
| * for the descriptor list (BUFFERLISTSIZE). |
| */ |
| BufferCount = (SCA_MEM_SIZE/4 - BUFFERLISTSIZE)/SCABUFSIZE; |
| |
| /* limit number of buffers to maximum amount of descriptors */ |
| if (BufferCount > BUFFERLISTSIZE/sizeof(SCADESC)) |
| BufferCount = BUFFERLISTSIZE/sizeof(SCADESC); |
| |
| /* use enough buffers to transmit one max size frame */ |
| info->tx_buf_count = BuffersPerFrame + 1; |
| |
| /* never use more than half the available buffers for transmit */ |
| if (info->tx_buf_count > (BufferCount/2)) |
| info->tx_buf_count = BufferCount/2; |
| |
| if (info->tx_buf_count > SCAMAXDESC) |
| info->tx_buf_count = SCAMAXDESC; |
| |
| /* use remaining buffers for receive */ |
| info->rx_buf_count = BufferCount - info->tx_buf_count; |
| |
| if (info->rx_buf_count > SCAMAXDESC) |
| info->rx_buf_count = SCAMAXDESC; |
| |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk("%s(%d):%s Allocating %d TX and %d RX DMA buffers.\n", |
| __FILE__,__LINE__, info->device_name, |
| info->tx_buf_count,info->rx_buf_count); |
| |
| if ( alloc_buf_list( info ) < 0 || |
| alloc_frame_bufs(info, |
| info->rx_buf_list, |
| info->rx_buf_list_ex, |
| info->rx_buf_count) < 0 || |
| alloc_frame_bufs(info, |
| info->tx_buf_list, |
| info->tx_buf_list_ex, |
| info->tx_buf_count) < 0 || |
| alloc_tmp_rx_buf(info) < 0 ) { |
| printk("%s(%d):%s Can't allocate DMA buffer memory\n", |
| __FILE__,__LINE__, info->device_name); |
| return -ENOMEM; |
| } |
| |
| rx_reset_buffers( info ); |
| |
| return 0; |
| } |
| |
| /* Allocate DMA buffers for the transmit and receive descriptor lists. |
| */ |
| static int alloc_buf_list(SLMP_INFO *info) |
| { |
| unsigned int i; |
| |
| /* build list in adapter shared memory */ |
| info->buffer_list = info->memory_base + info->port_array[0]->last_mem_alloc; |
| info->buffer_list_phys = info->port_array[0]->last_mem_alloc; |
| info->port_array[0]->last_mem_alloc += BUFFERLISTSIZE; |
| |
| memset(info->buffer_list, 0, BUFFERLISTSIZE); |
| |
| /* Save virtual address pointers to the receive and */ |
| /* transmit buffer lists. (Receive 1st). These pointers will */ |
| /* be used by the processor to access the lists. */ |
| info->rx_buf_list = (SCADESC *)info->buffer_list; |
| |
| info->tx_buf_list = (SCADESC *)info->buffer_list; |
| info->tx_buf_list += info->rx_buf_count; |
| |
| /* Build links for circular buffer entry lists (tx and rx) |
| * |
| * Note: links are physical addresses read by the SCA device |
| * to determine the next buffer entry to use. |
| */ |
| |
| for ( i = 0; i < info->rx_buf_count; i++ ) { |
| /* calculate and store physical address of this buffer entry */ |
| info->rx_buf_list_ex[i].phys_entry = |
| info->buffer_list_phys + (i * sizeof(SCABUFSIZE)); |
| |
| /* calculate and store physical address of */ |
| /* next entry in cirular list of entries */ |
| info->rx_buf_list[i].next = info->buffer_list_phys; |
| if ( i < info->rx_buf_count - 1 ) |
| info->rx_buf_list[i].next += (i + 1) * sizeof(SCADESC); |
| |
| info->rx_buf_list[i].length = SCABUFSIZE; |
| } |
| |
| for ( i = 0; i < info->tx_buf_count; i++ ) { |
| /* calculate and store physical address of this buffer entry */ |
| info->tx_buf_list_ex[i].phys_entry = info->buffer_list_phys + |
| ((info->rx_buf_count + i) * sizeof(SCADESC)); |
| |
| /* calculate and store physical address of */ |
| /* next entry in cirular list of entries */ |
| |
| info->tx_buf_list[i].next = info->buffer_list_phys + |
| info->rx_buf_count * sizeof(SCADESC); |
| |
| if ( i < info->tx_buf_count - 1 ) |
| info->tx_buf_list[i].next += (i + 1) * sizeof(SCADESC); |
| } |
| |
| return 0; |
| } |
| |
| /* Allocate the frame DMA buffers used by the specified buffer list. |
| */ |
| static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *buf_list,SCADESC_EX *buf_list_ex,int count) |
| { |
| int i; |
| unsigned long phys_addr; |
| |
| for ( i = 0; i < count; i++ ) { |
| buf_list_ex[i].virt_addr = info->memory_base + info->port_array[0]->last_mem_alloc; |
| phys_addr = info->port_array[0]->last_mem_alloc; |
| info->port_array[0]->last_mem_alloc += SCABUFSIZE; |
| |
| buf_list[i].buf_ptr = (unsigned short)phys_addr; |
| buf_list[i].buf_base = (unsigned char)(phys_addr >> 16); |
| } |
| |
| return 0; |
| } |
| |
| static void free_dma_bufs(SLMP_INFO *info) |
| { |
| info->buffer_list = NULL; |
| info->rx_buf_list = NULL; |
| info->tx_buf_list = NULL; |
| } |
| |
| /* allocate buffer large enough to hold max_frame_size. |
| * This buffer is used to pass an assembled frame to the line discipline. |
| */ |
| static int alloc_tmp_rx_buf(SLMP_INFO *info) |
| { |
| info->tmp_rx_buf = kmalloc(info->max_frame_size, GFP_KERNEL); |
| if (info->tmp_rx_buf == NULL) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| static void free_tmp_rx_buf(SLMP_INFO *info) |
| { |
| kfree(info->tmp_rx_buf); |
| info->tmp_rx_buf = NULL; |
| } |
| |
| static int claim_resources(SLMP_INFO *info) |
| { |
| if (request_mem_region(info->phys_memory_base,SCA_MEM_SIZE,"synclinkmp") == NULL) { |
| printk( "%s(%d):%s mem addr conflict, Addr=%08X\n", |
| __FILE__,__LINE__,info->device_name, info->phys_memory_base); |
| info->init_error = DiagStatus_AddressConflict; |
| goto errout; |
| } |
| else |
| info->shared_mem_requested = true; |
| |
| if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclinkmp") == NULL) { |
| printk( "%s(%d):%s lcr mem addr conflict, Addr=%08X\n", |
| __FILE__,__LINE__,info->device_name, info->phys_lcr_base); |
| info->init_error = DiagStatus_AddressConflict; |
| goto errout; |
| } |
| else |
| info->lcr_mem_requested = true; |
| |
| if (request_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE,"synclinkmp") == NULL) { |
| printk( "%s(%d):%s sca mem addr conflict, Addr=%08X\n", |
| __FILE__,__LINE__,info->device_name, info->phys_sca_base); |
| info->init_error = DiagStatus_AddressConflict; |
| goto errout; |
| } |
| else |
| info->sca_base_requested = true; |
| |
| if (request_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE,"synclinkmp") == NULL) { |
| printk( "%s(%d):%s stat/ctrl mem addr conflict, Addr=%08X\n", |
| __FILE__,__LINE__,info->device_name, info->phys_statctrl_base); |
| info->init_error = DiagStatus_AddressConflict; |
| goto errout; |
| } |
| else |
| info->sca_statctrl_requested = true; |
| |
| info->memory_base = ioremap_nocache(info->phys_memory_base, |
| SCA_MEM_SIZE); |
| if (!info->memory_base) { |
| printk( "%s(%d):%s Can't map shared memory, MemAddr=%08X\n", |
| __FILE__,__LINE__,info->device_name, info->phys_memory_base ); |
| info->init_error = DiagStatus_CantAssignPciResources; |
| goto errout; |
| } |
| |
| info->lcr_base = ioremap_nocache(info->phys_lcr_base, PAGE_SIZE); |
| if (!info->lcr_base) { |
| printk( "%s(%d):%s Can't map LCR memory, MemAddr=%08X\n", |
| __FILE__,__LINE__,info->device_name, info->phys_lcr_base ); |
| info->init_error = DiagStatus_CantAssignPciResources; |
| goto errout; |
| } |
| info->lcr_base += info->lcr_offset; |
| |
| info->sca_base = ioremap_nocache(info->phys_sca_base, PAGE_SIZE); |
| if (!info->sca_base) { |
| printk( "%s(%d):%s Can't map SCA memory, MemAddr=%08X\n", |
| __FILE__,__LINE__,info->device_name, info->phys_sca_base ); |
| info->init_error = DiagStatus_CantAssignPciResources; |
| goto errout; |
| } |
| info->sca_base += info->sca_offset; |
| |
| info->statctrl_base = ioremap_nocache(info->phys_statctrl_base, |
| PAGE_SIZE); |
| if (!info->statctrl_base) { |
| printk( "%s(%d):%s Can't map SCA Status/Control memory, MemAddr=%08X\n", |
| __FILE__,__LINE__,info->device_name, info->phys_statctrl_base ); |
| info->init_error = DiagStatus_CantAssignPciResources; |
| goto errout; |
| } |
| info->statctrl_base += info->statctrl_offset; |
| |
| if ( !memory_test(info) ) { |
| printk( "%s(%d):Shared Memory Test failed for device %s MemAddr=%08X\n", |
| __FILE__,__LINE__,info->device_name, info->phys_memory_base ); |
| info->init_error = DiagStatus_MemoryError; |
| goto errout; |
| } |
| |
| return 0; |
| |
| errout: |
| release_resources( info ); |
| return -ENODEV; |
| } |
| |
| static void release_resources(SLMP_INFO *info) |
| { |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk( "%s(%d):%s release_resources() entry\n", |
| __FILE__,__LINE__,info->device_name ); |
| |
| if ( info->irq_requested ) { |
| free_irq(info->irq_level, info); |
| info->irq_requested = false; |
| } |
| |
| if ( info->shared_mem_requested ) { |
| release_mem_region(info->phys_memory_base,SCA_MEM_SIZE); |
| info->shared_mem_requested = false; |
| } |
| if ( info->lcr_mem_requested ) { |
| release_mem_region(info->phys_lcr_base + info->lcr_offset,128); |
| info->lcr_mem_requested = false; |
| } |
| if ( info->sca_base_requested ) { |
| release_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE); |
| info->sca_base_requested = false; |
| } |
| if ( info->sca_statctrl_requested ) { |
| release_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE); |
| info->sca_statctrl_requested = false; |
| } |
| |
| if (info->memory_base){ |
| iounmap(info->memory_base); |
| info->memory_base = NULL; |
| } |
| |
| if (info->sca_base) { |
| iounmap(info->sca_base - info->sca_offset); |
| info->sca_base=NULL; |
| } |
| |
| if (info->statctrl_base) { |
| iounmap(info->statctrl_base - info->statctrl_offset); |
| info->statctrl_base=NULL; |
| } |
| |
| if (info->lcr_base){ |
| iounmap(info->lcr_base - info->lcr_offset); |
| info->lcr_base = NULL; |
| } |
| |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk( "%s(%d):%s release_resources() exit\n", |
| __FILE__,__LINE__,info->device_name ); |
| } |
| |
| /* Add the specified device instance data structure to the |
| * global linked list of devices and increment the device count. |
| */ |
| static void add_device(SLMP_INFO *info) |
| { |
| info->next_device = NULL; |
| info->line = synclinkmp_device_count; |
| sprintf(info->device_name,"ttySLM%dp%d",info->adapter_num,info->port_num); |
| |
| if (info->line < MAX_DEVICES) { |
| if (maxframe[info->line]) |
| info->max_frame_size = maxframe[info->line]; |
| } |
| |
| synclinkmp_device_count++; |
| |
| if ( !synclinkmp_device_list ) |
| synclinkmp_device_list = info; |
| else { |
| SLMP_INFO *current_dev = synclinkmp_device_list; |
| while( current_dev->next_device ) |
| current_dev = current_dev->next_device; |
| current_dev->next_device = info; |
| } |
| |
| if ( info->max_frame_size < 4096 ) |
| info->max_frame_size = 4096; |
| else if ( info->max_frame_size > 65535 ) |
| info->max_frame_size = 65535; |
| |
| printk( "SyncLink MultiPort %s: " |
| "Mem=(%08x %08X %08x %08X) IRQ=%d MaxFrameSize=%u\n", |
| info->device_name, |
| info->phys_sca_base, |
| info->phys_memory_base, |
| info->phys_statctrl_base, |
| info->phys_lcr_base, |
| info->irq_level, |
| info->max_frame_size ); |
| |
| #if SYNCLINK_GENERIC_HDLC |
| hdlcdev_init(info); |
| #endif |
| } |
| |
| static const struct tty_port_operations port_ops = { |
| .carrier_raised = carrier_raised, |
| .dtr_rts = dtr_rts, |
| }; |
| |
| /* Allocate and initialize a device instance structure |
| * |
| * Return Value: pointer to SLMP_INFO if success, otherwise NULL |
| */ |
| static SLMP_INFO *alloc_dev(int adapter_num, int port_num, struct pci_dev *pdev) |
| { |
| SLMP_INFO *info; |
| |
| info = kzalloc(sizeof(SLMP_INFO), |
| GFP_KERNEL); |
| |
| if (!info) { |
| printk("%s(%d) Error can't allocate device instance data for adapter %d, port %d\n", |
| __FILE__,__LINE__, adapter_num, port_num); |
| } else { |
| tty_port_init(&info->port); |
| info->port.ops = &port_ops; |
| info->magic = MGSL_MAGIC; |
| INIT_WORK(&info->task, bh_handler); |
| info->max_frame_size = 4096; |
| info->port.close_delay = 5*HZ/10; |
| info->port.closing_wait = 30*HZ; |
| init_waitqueue_head(&info->status_event_wait_q); |
| init_waitqueue_head(&info->event_wait_q); |
| spin_lock_init(&info->netlock); |
| memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS)); |
| info->idle_mode = HDLC_TXIDLE_FLAGS; |
| info->adapter_num = adapter_num; |
| info->port_num = port_num; |
| |
| /* Copy configuration info to device instance data */ |
| info->irq_level = pdev->irq; |
| info->phys_lcr_base = pci_resource_start(pdev,0); |
| info->phys_sca_base = pci_resource_start(pdev,2); |
| info->phys_memory_base = pci_resource_start(pdev,3); |
| info->phys_statctrl_base = pci_resource_start(pdev,4); |
| |
| /* Because veremap only works on page boundaries we must map |
| * a larger area than is actually implemented for the LCR |
| * memory range. We map a full page starting at the page boundary. |
| */ |
| info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1); |
| info->phys_lcr_base &= ~(PAGE_SIZE-1); |
| |
| info->sca_offset = info->phys_sca_base & (PAGE_SIZE-1); |
| info->phys_sca_base &= ~(PAGE_SIZE-1); |
| |
| info->statctrl_offset = info->phys_statctrl_base & (PAGE_SIZE-1); |
| info->phys_statctrl_base &= ~(PAGE_SIZE-1); |
| |
| info->bus_type = MGSL_BUS_TYPE_PCI; |
| info->irq_flags = IRQF_SHARED; |
| |
| setup_timer(&info->tx_timer, tx_timeout, (unsigned long)info); |
| setup_timer(&info->status_timer, status_timeout, |
| (unsigned long)info); |
| |
| /* Store the PCI9050 misc control register value because a flaw |
| * in the PCI9050 prevents LCR registers from being read if |
| * BIOS assigns an LCR base address with bit 7 set. |
| * |
| * Only the misc control register is accessed for which only |
| * write access is needed, so set an initial value and change |
| * bits to the device instance data as we write the value |
| * to the actual misc control register. |
| */ |
| info->misc_ctrl_value = 0x087e4546; |
| |
| /* initial port state is unknown - if startup errors |
| * occur, init_error will be set to indicate the |
| * problem. Once the port is fully initialized, |
| * this value will be set to 0 to indicate the |
| * port is available. |
| */ |
| info->init_error = -1; |
| } |
| |
| return info; |
| } |
| |
| static void device_init(int adapter_num, struct pci_dev *pdev) |
| { |
| SLMP_INFO *port_array[SCA_MAX_PORTS]; |
| int port; |
| |
| /* allocate device instances for up to SCA_MAX_PORTS devices */ |
| for ( port = 0; port < SCA_MAX_PORTS; ++port ) { |
| port_array[port] = alloc_dev(adapter_num,port,pdev); |
| if( port_array[port] == NULL ) { |
| for ( --port; port >= 0; --port ) |
| kfree(port_array[port]); |
| return; |
| } |
| } |
| |
| /* give copy of port_array to all ports and add to device list */ |
| for ( port = 0; port < SCA_MAX_PORTS; ++port ) { |
| memcpy(port_array[port]->port_array,port_array,sizeof(port_array)); |
| add_device( port_array[port] ); |
| spin_lock_init(&port_array[port]->lock); |
| } |
| |
| /* Allocate and claim adapter resources */ |
| if ( !claim_resources(port_array[0]) ) { |
| |
| alloc_dma_bufs(port_array[0]); |
| |
| /* copy resource information from first port to others */ |
| for ( port = 1; port < SCA_MAX_PORTS; ++port ) { |
| port_array[port]->lock = port_array[0]->lock; |
| port_array[port]->irq_level = port_array[0]->irq_level; |
| port_array[port]->memory_base = port_array[0]->memory_base; |
| port_array[port]->sca_base = port_array[0]->sca_base; |
| port_array[port]->statctrl_base = port_array[0]->statctrl_base; |
| port_array[port]->lcr_base = port_array[0]->lcr_base; |
| alloc_dma_bufs(port_array[port]); |
| } |
| |
| if ( request_irq(port_array[0]->irq_level, |
| synclinkmp_interrupt, |
| port_array[0]->irq_flags, |
| port_array[0]->device_name, |
| port_array[0]) < 0 ) { |
| printk( "%s(%d):%s Can't request interrupt, IRQ=%d\n", |
| __FILE__,__LINE__, |
| port_array[0]->device_name, |
| port_array[0]->irq_level ); |
| } |
| else { |
| port_array[0]->irq_requested = true; |
| adapter_test(port_array[0]); |
| } |
| } |
| } |
| |
| static const struct tty_operations ops = { |
| .open = open, |
| .close = close, |
| .write = write, |
| .put_char = put_char, |
| .flush_chars = flush_chars, |
| .write_room = write_room, |
| .chars_in_buffer = chars_in_buffer, |
| .flush_buffer = flush_buffer, |
| .ioctl = ioctl, |
| .throttle = throttle, |
| .unthrottle = unthrottle, |
| .send_xchar = send_xchar, |
| .break_ctl = set_break, |
| .wait_until_sent = wait_until_sent, |
| .set_termios = set_termios, |
| .stop = tx_hold, |
| .start = tx_release, |
| .hangup = hangup, |
| .tiocmget = tiocmget, |
| .tiocmset = tiocmset, |
| .get_icount = get_icount, |
| .proc_fops = &synclinkmp_proc_fops, |
| }; |
| |
| |
| static void synclinkmp_cleanup(void) |
| { |
| int rc; |
| SLMP_INFO *info; |
| SLMP_INFO *tmp; |
| |
| printk("Unloading %s %s\n", driver_name, driver_version); |
| |
| if (serial_driver) { |
| if ((rc = tty_unregister_driver(serial_driver))) |
| printk("%s(%d) failed to unregister tty driver err=%d\n", |
| __FILE__,__LINE__,rc); |
| put_tty_driver(serial_driver); |
| } |
| |
| /* reset devices */ |
| info = synclinkmp_device_list; |
| while(info) { |
| reset_port(info); |
| info = info->next_device; |
| } |
| |
| /* release devices */ |
| info = synclinkmp_device_list; |
| while(info) { |
| #if SYNCLINK_GENERIC_HDLC |
| hdlcdev_exit(info); |
| #endif |
| free_dma_bufs(info); |
| free_tmp_rx_buf(info); |
| if ( info->port_num == 0 ) { |
| if (info->sca_base) |
| write_reg(info, LPR, 1); /* set low power mode */ |
| release_resources(info); |
| } |
| tmp = info; |
| info = info->next_device; |
| kfree(tmp); |
| } |
| |
| pci_unregister_driver(&synclinkmp_pci_driver); |
| } |
| |
| /* Driver initialization entry point. |
| */ |
| |
| static int __init synclinkmp_init(void) |
| { |
| int rc; |
| |
| if (break_on_load) { |
| synclinkmp_get_text_ptr(); |
| BREAKPOINT(); |
| } |
| |
| printk("%s %s\n", driver_name, driver_version); |
| |
| if ((rc = pci_register_driver(&synclinkmp_pci_driver)) < 0) { |
| printk("%s:failed to register PCI driver, error=%d\n",__FILE__,rc); |
| return rc; |
| } |
| |
| serial_driver = alloc_tty_driver(128); |
| if (!serial_driver) { |
| rc = -ENOMEM; |
| goto error; |
| } |
| |
| /* Initialize the tty_driver structure */ |
| |
| serial_driver->driver_name = "synclinkmp"; |
| serial_driver->name = "ttySLM"; |
| serial_driver->major = ttymajor; |
| serial_driver->minor_start = 64; |
| serial_driver->type = TTY_DRIVER_TYPE_SERIAL; |
| serial_driver->subtype = SERIAL_TYPE_NORMAL; |
| serial_driver->init_termios = tty_std_termios; |
| serial_driver->init_termios.c_cflag = |
| B9600 | CS8 | CREAD | HUPCL | CLOCAL; |
| serial_driver->init_termios.c_ispeed = 9600; |
| serial_driver->init_termios.c_ospeed = 9600; |
| serial_driver->flags = TTY_DRIVER_REAL_RAW; |
| tty_set_operations(serial_driver, &ops); |
| if ((rc = tty_register_driver(serial_driver)) < 0) { |
| printk("%s(%d):Couldn't register serial driver\n", |
| __FILE__,__LINE__); |
| put_tty_driver(serial_driver); |
| serial_driver = NULL; |
| goto error; |
| } |
| |
| printk("%s %s, tty major#%d\n", |
| driver_name, driver_version, |
| serial_driver->major); |
| |
| return 0; |
| |
| error: |
| synclinkmp_cleanup(); |
| return rc; |
| } |
| |
| static void __exit synclinkmp_exit(void) |
| { |
| synclinkmp_cleanup(); |
| } |
| |
| module_init(synclinkmp_init); |
| module_exit(synclinkmp_exit); |
| |
| /* Set the port for internal loopback mode. |
| * The TxCLK and RxCLK signals are generated from the BRG and |
| * the TxD is looped back to the RxD internally. |
| */ |
| static void enable_loopback(SLMP_INFO *info, int enable) |
| { |
| if (enable) { |
| /* MD2 (Mode Register 2) |
| * 01..00 CNCT<1..0> Channel Connection 11=Local Loopback |
| */ |
| write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) | (BIT1 + BIT0))); |
| |
| /* degate external TxC clock source */ |
| info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2)); |
| write_control_reg(info); |
| |
| /* RXS/TXS (Rx/Tx clock source) |
| * 07 Reserved, must be 0 |
| * 06..04 Clock Source, 100=BRG |
| * 03..00 Clock Divisor, 0000=1 |
| */ |
| write_reg(info, RXS, 0x40); |
| write_reg(info, TXS, 0x40); |
| |
| } else { |
| /* MD2 (Mode Register 2) |
| * 01..00 CNCT<1..0> Channel connection, 0=normal |
| */ |
| write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) & ~(BIT1 + BIT0))); |
| |
| /* RXS/TXS (Rx/Tx clock source) |
| * 07 Reserved, must be 0 |
| * 06..04 Clock Source, 000=RxC/TxC Pin |
| * 03..00 Clock Divisor, 0000=1 |
| */ |
| write_reg(info, RXS, 0x00); |
| write_reg(info, TXS, 0x00); |
| } |
| |
| /* set LinkSpeed if available, otherwise default to 2Mbps */ |
| if (info->params.clock_speed) |
| set_rate(info, info->params.clock_speed); |
| else |
| set_rate(info, 3686400); |
| } |
| |
| /* Set the baud rate register to the desired speed |
| * |
| * data_rate data rate of clock in bits per second |
| * A data rate of 0 disables the AUX clock. |
| */ |
| static void set_rate( SLMP_INFO *info, u32 data_rate ) |
| { |
| u32 TMCValue; |
| unsigned char BRValue; |
| u32 Divisor=0; |
| |
| /* fBRG = fCLK/(TMC * 2^BR) |
| */ |
| if (data_rate != 0) { |
| Divisor = 14745600/data_rate; |
| if (!Divisor) |
| Divisor = 1; |
| |
| TMCValue = Divisor; |
| |
| BRValue = 0; |
| if (TMCValue != 1 && TMCValue != 2) { |
| /* BRValue of 0 provides 50/50 duty cycle *only* when |
| * TMCValue is 1 or 2. BRValue of 1 to 9 always provides |
| * 50/50 duty cycle. |
| */ |
| BRValue = 1; |
| TMCValue >>= 1; |
| } |
| |
| /* while TMCValue is too big for TMC register, divide |
| * by 2 and increment BR exponent. |
| */ |
| for(; TMCValue > 256 && BRValue < 10; BRValue++) |
| TMCValue >>= 1; |
| |
| write_reg(info, TXS, |
| (unsigned char)((read_reg(info, TXS) & 0xf0) | BRValue)); |
| write_reg(info, RXS, |
| (unsigned char)((read_reg(info, RXS) & 0xf0) | BRValue)); |
| write_reg(info, TMC, (unsigned char)TMCValue); |
| } |
| else { |
| write_reg(info, TXS,0); |
| write_reg(info, RXS,0); |
| write_reg(info, TMC, 0); |
| } |
| } |
| |
| /* Disable receiver |
| */ |
| static void rx_stop(SLMP_INFO *info) |
| { |
| if (debug_level >= DEBUG_LEVEL_ISR) |
| printk("%s(%d):%s rx_stop()\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| write_reg(info, CMD, RXRESET); |
| |
| info->ie0_value &= ~RXRDYE; |
| write_reg(info, IE0, info->ie0_value); /* disable Rx data interrupts */ |
| |
| write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */ |
| write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */ |
| write_reg(info, RXDMA + DIR, 0); /* disable Rx DMA interrupts */ |
| |
| info->rx_enabled = false; |
| info->rx_overflow = false; |
| } |
| |
| /* enable the receiver |
| */ |
| static void rx_start(SLMP_INFO *info) |
| { |
| int i; |
| |
| if (debug_level >= DEBUG_LEVEL_ISR) |
| printk("%s(%d):%s rx_start()\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| write_reg(info, CMD, RXRESET); |
| |
| if ( info->params.mode == MGSL_MODE_HDLC ) { |
| /* HDLC, disabe IRQ on rxdata */ |
| info->ie0_value &= ~RXRDYE; |
| write_reg(info, IE0, info->ie0_value); |
| |
| /* Reset all Rx DMA buffers and program rx dma */ |
| write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */ |
| write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */ |
| |
| for (i = 0; i < info->rx_buf_count; i++) { |
| info->rx_buf_list[i].status = 0xff; |
| |
| // throttle to 4 shared memory writes at a time to prevent |
| // hogging local bus (keep latency time for DMA requests low). |
| if (!(i % 4)) |
| read_status_reg(info); |
| } |
| info->current_rx_buf = 0; |
| |
| /* set current/1st descriptor address */ |
| write_reg16(info, RXDMA + CDA, |
| info->rx_buf_list_ex[0].phys_entry); |
| |
| /* set new last rx descriptor address */ |
| write_reg16(info, RXDMA + EDA, |
| info->rx_buf_list_ex[info->rx_buf_count - 1].phys_entry); |
| |
| /* set buffer length (shared by all rx dma data buffers) */ |
| write_reg16(info, RXDMA + BFL, SCABUFSIZE); |
| |
| write_reg(info, RXDMA + DIR, 0x60); /* enable Rx DMA interrupts (EOM/BOF) */ |
| write_reg(info, RXDMA + DSR, 0xf2); /* clear Rx DMA IRQs, enable Rx DMA */ |
| } else { |
| /* async, enable IRQ on rxdata */ |
| info->ie0_value |= RXRDYE; |
| write_reg(info, IE0, info->ie0_value); |
| } |
| |
| write_reg(info, CMD, RXENABLE); |
| |
| info->rx_overflow = false; |
| info->rx_enabled = true; |
| } |
| |
| /* Enable the transmitter and send a transmit frame if |
| * one is loaded in the DMA buffers. |
| */ |
| static void tx_start(SLMP_INFO *info) |
| { |
| if (debug_level >= DEBUG_LEVEL_ISR) |
| printk("%s(%d):%s tx_start() tx_count=%d\n", |
| __FILE__,__LINE__, info->device_name,info->tx_count ); |
| |
| if (!info->tx_enabled ) { |
| write_reg(info, CMD, TXRESET); |
| write_reg(info, CMD, TXENABLE); |
| info->tx_enabled = true; |
| } |
| |
| if ( info->tx_count ) { |
| |
| /* If auto RTS enabled and RTS is inactive, then assert */ |
| /* RTS and set a flag indicating that the driver should */ |
| /* negate RTS when the transmission completes. */ |
| |
| info->drop_rts_on_tx_done = false; |
| |
| if (info->params.mode != MGSL_MODE_ASYNC) { |
| |
| if ( info->params.flags & HDLC_FLAG_AUTO_RTS ) { |
| get_signals( info ); |
| if ( !(info->serial_signals & SerialSignal_RTS) ) { |
| info->serial_signals |= SerialSignal_RTS; |
| set_signals( info ); |
| info->drop_rts_on_tx_done = true; |
| } |
| } |
| |
| write_reg16(info, TRC0, |
| (unsigned short)(((tx_negate_fifo_level-1)<<8) + tx_active_fifo_level)); |
| |
| write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */ |
| write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ |
| |
| /* set TX CDA (current descriptor address) */ |
| write_reg16(info, TXDMA + CDA, |
| info->tx_buf_list_ex[0].phys_entry); |
| |
| /* set TX EDA (last descriptor address) */ |
| write_reg16(info, TXDMA + EDA, |
| info->tx_buf_list_ex[info->last_tx_buf].phys_entry); |
| |
| /* enable underrun IRQ */ |
| info->ie1_value &= ~IDLE; |
| info->ie1_value |= UDRN; |
| write_reg(info, IE1, info->ie1_value); |
| write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); |
| |
| write_reg(info, TXDMA + DIR, 0x40); /* enable Tx DMA interrupts (EOM) */ |
| write_reg(info, TXDMA + DSR, 0xf2); /* clear Tx DMA IRQs, enable Tx DMA */ |
| |
| mod_timer(&info->tx_timer, jiffies + |
| msecs_to_jiffies(5000)); |
| } |
| else { |
| tx_load_fifo(info); |
| /* async, enable IRQ on txdata */ |
| info->ie0_value |= TXRDYE; |
| write_reg(info, IE0, info->ie0_value); |
| } |
| |
| info->tx_active = true; |
| } |
| } |
| |
| /* stop the transmitter and DMA |
| */ |
| static void tx_stop( SLMP_INFO *info ) |
| { |
| if (debug_level >= DEBUG_LEVEL_ISR) |
| printk("%s(%d):%s tx_stop()\n", |
| __FILE__,__LINE__, info->device_name ); |
| |
| del_timer(&info->tx_timer); |
| |
| write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */ |
| write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ |
| |
| write_reg(info, CMD, TXRESET); |
| |
| info->ie1_value &= ~(UDRN + IDLE); |
| write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */ |
| write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */ |
| |
| info->ie0_value &= ~TXRDYE; |
| write_reg(info, IE0, info->ie0_value); /* disable tx data interrupts */ |
| |
| info->tx_enabled = false; |
| info->tx_active = false; |
| } |
| |
| /* Fill the transmit FIFO until the FIFO is full or |
| * there is no more data to load. |
| */ |
| static void tx_load_fifo(SLMP_INFO *info) |
| { |
| u8 TwoBytes[2]; |
| |
| /* do nothing is now tx data available and no XON/XOFF pending */ |
| |
| if ( !info->tx_count && !info->x_char ) |
| return; |
| |
| /* load the Transmit FIFO until FIFOs full or all data sent */ |
| |
| while( info->tx_count && (read_reg(info,SR0) & BIT1) ) { |
| |
| /* there is more space in the transmit FIFO and */ |
| /* there is more data in transmit buffer */ |
| |
| if ( (info->tx_count > 1) && !info->x_char ) { |
| /* write 16-bits */ |
| TwoBytes[0] = info->tx_buf[info->tx_get++]; |
| if (info->tx_get >= info->max_frame_size) |
| info->tx_get -= info->max_frame_size; |
| TwoBytes[1] = info->tx_buf[info->tx_get++]; |
| if (info->tx_get >= info->max_frame_size) |
| info->tx_get -= info->max_frame_size; |
| |
| write_reg16(info, TRB, *((u16 *)TwoBytes)); |
| |
| info->tx_count -= 2; |
| info->icount.tx += 2; |
| } else { |
| /* only 1 byte left to transmit or 1 FIFO slot left */ |
| |
| if (info->x_char) { |
| /* transmit pending high priority char */ |
| write_reg(info, TRB, info->x_char); |
| info->x_char = 0; |
| } else { |
| write_reg(info, TRB, info->tx_buf[info->tx_get++]); |
| if (info->tx_get >= info->max_frame_size) |
| info->tx_get -= info->max_frame_size; |
| info->tx_count--; |
| } |
| info->icount.tx++; |
| } |
| } |
| } |
| |
| /* Reset a port to a known state |
| */ |
| static void reset_port(SLMP_INFO *info) |
| { |
| if (info->sca_base) { |
| |
| tx_stop(info); |
| rx_stop(info); |
| |
| info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); |
| set_signals(info); |
| |
| /* disable all port interrupts */ |
| info->ie0_value = 0; |
| info->ie1_value = 0; |
| info->ie2_value = 0; |
| write_reg(info, IE0, info->ie0_value); |
| write_reg(info, IE1, info->ie1_value); |
| write_reg(info, IE2, info->ie2_value); |
| |
| write_reg(info, CMD, CHRESET); |
| } |
| } |
| |
| /* Reset all the ports to a known state. |
| */ |
| static void reset_adapter(SLMP_INFO *info) |
| { |
| int i; |
| |
| for ( i=0; i < SCA_MAX_PORTS; ++i) { |
| if (info->port_array[i]) |
| reset_port(info->port_array[i]); |
| } |
| } |
| |
| /* Program port for asynchronous communications. |
| */ |
| static void async_mode(SLMP_INFO *info) |
| { |
| |
| unsigned char RegValue; |
| |
| tx_stop(info); |
| rx_stop(info); |
| |
| /* MD0, Mode Register 0 |
| * |
| * 07..05 PRCTL<2..0>, Protocol Mode, 000=async |
| * 04 AUTO, Auto-enable (RTS/CTS/DCD) |
| * 03 Reserved, must be 0 |
| * 02 CRCCC, CRC Calculation, 0=disabled |
| * 01..00 STOP<1..0> Stop bits (00=1,10=2) |
| * |
| * 0000 0000 |
| */ |
| RegValue = 0x00; |
| if (info->params.stop_bits != 1) |
| RegValue |= BIT1; |
| write_reg(info, MD0, RegValue); |
| |
| /* MD1, Mode Register 1 |
| * |
| * 07..06 BRATE<1..0>, bit rate, 00=1/1 01=1/16 10=1/32 11=1/64 |
| * 05..04 TXCHR<1..0>, tx char size, 00=8 bits,01=7,10=6,11=5 |
| * 03..02 RXCHR<1..0>, rx char size |
| * 01..00 PMPM<1..0>, Parity mode, 00=none 10=even 11=odd |
| * |
| * 0100 0000 |
| */ |
| RegValue = 0x40; |
| switch (info->params.data_bits) { |
| case 7: RegValue |= BIT4 + BIT2; break; |
| case 6: RegValue |= BIT5 + BIT3; break; |
| case 5: RegValue |= BIT5 + BIT4 + BIT3 + BIT2; break; |
| } |
| if (info->params.parity != ASYNC_PARITY_NONE) { |
| RegValue |= BIT1; |
| if (info->params.parity == ASYNC_PARITY_ODD) |
| RegValue |= BIT0; |
| } |
| write_reg(info, MD1, RegValue); |
| |
| /* MD2, Mode Register 2 |
| * |
| * 07..02 Reserved, must be 0 |
| * 01..00 CNCT<1..0> Channel connection, 00=normal 11=local loopback |
| * |
| * 0000 0000 |
| */ |
| RegValue = 0x00; |
| if (info->params.loopback) |
| RegValue |= (BIT1 + BIT0); |
| write_reg(info, MD2, RegValue); |
| |
| /* RXS, Receive clock source |
| * |
| * 07 Reserved, must be 0 |
| * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL |
| * 03..00 RXBR<3..0>, rate divisor, 0000=1 |
| */ |
| RegValue=BIT6; |
| write_reg(info, RXS, RegValue); |
| |
| /* TXS, Transmit clock source |
| * |
| * 07 Reserved, must be 0 |
| * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock |
| * 03..00 RXBR<3..0>, rate divisor, 0000=1 |
| */ |
| RegValue=BIT6; |
| write_reg(info, TXS, RegValue); |
| |
| /* Control Register |
| * |
| * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out |
| */ |
| info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2)); |
| write_control_reg(info); |
| |
| tx_set_idle(info); |
| |
| /* RRC Receive Ready Control 0 |
| * |
| * 07..05 Reserved, must be 0 |
| * 04..00 RRC<4..0> Rx FIFO trigger active 0x00 = 1 byte |
| */ |
| write_reg(info, RRC, 0x00); |
| |
| /* TRC0 Transmit Ready Control 0 |
| * |
| * 07..05 Reserved, must be 0 |
| * 04..00 TRC<4..0> Tx FIFO trigger active 0x10 = 16 bytes |
| */ |
| write_reg(info, TRC0, 0x10); |
| |
| /* TRC1 Transmit Ready Control 1 |
| * |
| * 07..05 Reserved, must be 0 |
| * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1e = 31 bytes (full-1) |
| */ |
| write_reg(info, TRC1, 0x1e); |
| |
| /* CTL, MSCI control register |
| * |
| * 07..06 Reserved, set to 0 |
| * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC) |
| * 04 IDLC, idle control, 0=mark 1=idle register |
| * 03 BRK, break, 0=off 1 =on (async) |
| * 02 SYNCLD, sync char load enable (BSC) 1=enabled |
| * 01 GOP, go active on poll (LOOP mode) 1=enabled |
| * 00 RTS, RTS output control, 0=active 1=inactive |
| * |
| * 0001 0001 |
| */ |
| RegValue = 0x10; |
| if (!(info->serial_signals & SerialSignal_RTS)) |
| RegValue |= 0x01; |
| write_reg(info, CTL, RegValue); |
| |
| /* enable status interrupts */ |
| info->ie0_value |= TXINTE + RXINTE; |
| write_reg(info, IE0, info->ie0_value); |
| |
| /* enable break detect interrupt */ |
| info->ie1_value = BRKD; |
| write_reg(info, IE1, info->ie1_value); |
| |
| /* enable rx overrun interrupt */ |
| info->ie2_value = OVRN; |
| write_reg(info, IE2, info->ie2_value); |
| |
| set_rate( info, info->params.data_rate * 16 ); |
| } |
| |
| /* Program the SCA for HDLC communications. |
| */ |
| static void hdlc_mode(SLMP_INFO *info) |
| { |
| unsigned char RegValue; |
| u32 DpllDivisor; |
| |
| // Can't use DPLL because SCA outputs recovered clock on RxC when |
| // DPLL mode selected. This causes output contention with RxC receiver. |
| // Use of DPLL would require external hardware to disable RxC receiver |
| // when DPLL mode selected. |
| info->params.flags &= ~(HDLC_FLAG_TXC_DPLL + HDLC_FLAG_RXC_DPLL); |
| |
| /* disable DMA interrupts */ |
| write_reg(info, TXDMA + DIR, 0); |
| write_reg(info, RXDMA + DIR, 0); |
| |
| /* MD0, Mode Register 0 |
| * |
| * 07..05 PRCTL<2..0>, Protocol Mode, 100=HDLC |
| * 04 AUTO, Auto-enable (RTS/CTS/DCD) |
| * 03 Reserved, must be 0 |
| * 02 CRCCC, CRC Calculation, 1=enabled |
| * 01 CRC1, CRC selection, 0=CRC-16,1=CRC-CCITT-16 |
| * 00 CRC0, CRC initial value, 1 = all 1s |
| * |
| * 1000 0001 |
| */ |
| RegValue = 0x81; |
| if (info->params.flags & HDLC_FLAG_AUTO_CTS) |
| RegValue |= BIT4; |
| if (info->params.flags & HDLC_FLAG_AUTO_DCD) |
| RegValue |= BIT4; |
| if (info->params.crc_type == HDLC_CRC_16_CCITT) |
| RegValue |= BIT2 + BIT1; |
| write_reg(info, MD0, RegValue); |
| |
| /* MD1, Mode Register 1 |
| * |
| * 07..06 ADDRS<1..0>, Address detect, 00=no addr check |
| * 05..04 TXCHR<1..0>, tx char size, 00=8 bits |
| * 03..02 RXCHR<1..0>, rx char size, 00=8 bits |
| * 01..00 PMPM<1..0>, Parity mode, 00=no parity |
| * |
| * 0000 0000 |
| */ |
| RegValue = 0x00; |
| write_reg(info, MD1, RegValue); |
| |
| /* MD2, Mode Register 2 |
| * |
| * 07 NRZFM, 0=NRZ, 1=FM |
| * 06..05 CODE<1..0> Encoding, 00=NRZ |
| * 04..03 DRATE<1..0> DPLL Divisor, 00=8 |
| * 02 Reserved, must be 0 |
| * 01..00 CNCT<1..0> Channel connection, 0=normal |
| * |
| * 0000 0000 |
| */ |
| RegValue = 0x00; |
| switch(info->params.encoding) { |
| case HDLC_ENCODING_NRZI: RegValue |= BIT5; break; |
| case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT7 + BIT5; break; /* aka FM1 */ |
| case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT7 + BIT6; break; /* aka FM0 */ |
| case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT7; break; /* aka Manchester */ |
| #if 0 |
| case HDLC_ENCODING_NRZB: /* not supported */ |
| case HDLC_ENCODING_NRZI_MARK: /* not supported */ |
| case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: /* not supported */ |
| #endif |
| } |
| if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) { |
| DpllDivisor = 16; |
| RegValue |= BIT3; |
| } else if ( info->params.flags & HDLC_FLAG_DPLL_DIV8 ) { |
| DpllDivisor = 8; |
| } else { |
| DpllDivisor = 32; |
| RegValue |= BIT4; |
| } |
| write_reg(info, MD2, RegValue); |
| |
| |
| /* RXS, Receive clock source |
| * |
| * 07 Reserved, must be 0 |
| * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL |
| * 03..00 RXBR<3..0>, rate divisor, 0000=1 |
| */ |
| RegValue=0; |
| if (info->params.flags & HDLC_FLAG_RXC_BRG) |
| RegValue |= BIT6; |
| if (info->params.flags & HDLC_FLAG_RXC_DPLL) |
| RegValue |= BIT6 + BIT5; |
| write_reg(info, RXS, RegValue); |
| |
| /* TXS, Transmit clock source |
| * |
| * 07 Reserved, must be 0 |
| * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock |
| * 03..00 RXBR<3..0>, rate divisor, 0000=1 |
| */ |
| RegValue=0; |
| if (info->params.flags & HDLC_FLAG_TXC_BRG) |
| RegValue |= BIT6; |
| if (info->params.flags & HDLC_FLAG_TXC_DPLL) |
| RegValue |= BIT6 + BIT5; |
| write_reg(info, TXS, RegValue); |
| |
| if (info->params.flags & HDLC_FLAG_RXC_DPLL) |
| set_rate(info, info->params.clock_speed * DpllDivisor); |
| else |
| set_rate(info, info->params.clock_speed); |
| |
| /* GPDATA (General Purpose I/O Data Register) |
| * |
| * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out |
| */ |
| if (info->params.flags & HDLC_FLAG_TXC_BRG) |
| info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2)); |
| else |
| info->port_array[0]->ctrlreg_value &= ~(BIT0 << (info->port_num * 2)); |
| write_control_reg(info); |
| |
| /* RRC Receive Ready Control 0 |
| * |
| * 07..05 Reserved, must be 0 |
| * 04..00 RRC<4..0> Rx FIFO trigger active |
| */ |
| write_reg(info, RRC, rx_active_fifo_level); |
| |
| /* TRC0 Transmit Ready Control 0 |
| * |
| * 07..05 Reserved, must be 0 |
| * 04..00 TRC<4..0> Tx FIFO trigger active |
| */ |
| write_reg(info, TRC0, tx_active_fifo_level); |
| |
| /* TRC1 Transmit Ready Control 1 |
| * |
| * 07..05 Reserved, must be 0 |
| * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1f = 32 bytes (full) |
| */ |
| write_reg(info, TRC1, (unsigned char)(tx_negate_fifo_level - 1)); |
| |
| /* DMR, DMA Mode Register |
| * |
| * 07..05 Reserved, must be 0 |
| * 04 TMOD, Transfer Mode: 1=chained-block |
| * 03 Reserved, must be 0 |
| * 02 NF, Number of Frames: 1=multi-frame |
| * 01 CNTE, Frame End IRQ Counter enable: 0=disabled |
| * 00 Reserved, must be 0 |
| * |
| * 0001 0100 |
| */ |
| write_reg(info, TXDMA + DMR, 0x14); |
| write_reg(info, RXDMA + DMR, 0x14); |
| |
| /* Set chain pointer base (upper 8 bits of 24 bit addr) */ |
| write_reg(info, RXDMA + CPB, |
| (unsigned char)(info->buffer_list_phys >> 16)); |
| |
| /* Set chain pointer base (upper 8 bits of 24 bit addr) */ |
| write_reg(info, TXDMA + CPB, |
| (unsigned char)(info->buffer_list_phys >> 16)); |
| |
| /* enable status interrupts. other code enables/disables |
| * the individual sources for these two interrupt classes. |
| */ |
| info->ie0_value |= TXINTE + RXINTE; |
| write_reg(info, IE0, info->ie0_value); |
| |
| /* CTL, MSCI control register |
| * |
| * 07..06 Reserved, set to 0 |
| * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC) |
| * 04 IDLC, idle control, 0=mark 1=idle register |
| * 03 BRK, break, 0=off 1 =on (async) |
| * 02 SYNCLD, sync char load enable (BSC) 1=enabled |
| * 01 GOP, go active on poll (LOOP mode) 1=enabled |
| * 00 RTS, RTS output control, 0=active 1=inactive |
| * |
| * 0001 0001 |
| */ |
| RegValue = 0x10; |
| if (!(info->serial_signals & SerialSignal_RTS)) |
| RegValue |= 0x01; |
| write_reg(info, CTL, RegValue); |
| |
| /* preamble not supported ! */ |
| |
| tx_set_idle(info); |
| tx_stop(info); |
| rx_stop(info); |
| |
| set_rate(info, info->params.clock_speed); |
| |
| if (info->params.loopback) |
| enable_loopback(info,1); |
| } |
| |
| /* Set the transmit HDLC idle mode |
| */ |
| static void tx_set_idle(SLMP_INFO *info) |
| { |
| unsigned char RegValue = 0xff; |
| |
| /* Map API idle mode to SCA register bits */ |
| switch(info->idle_mode) { |
| case HDLC_TXIDLE_FLAGS: RegValue = 0x7e; break; |
| case HDLC_TXIDLE_ALT_ZEROS_ONES: RegValue = 0xaa; break; |
| case HDLC_TXIDLE_ZEROS: RegValue = 0x00; break; |
| case HDLC_TXIDLE_ONES: RegValue = 0xff; break; |
| case HDLC_TXIDLE_ALT_MARK_SPACE: RegValue = 0xaa; break; |
| case HDLC_TXIDLE_SPACE: RegValue = 0x00; break; |
| case HDLC_TXIDLE_MARK: RegValue = 0xff; break; |
| } |
| |
| write_reg(info, IDL, RegValue); |
| } |
| |
| /* Query the adapter for the state of the V24 status (input) signals. |
| */ |
| static void get_signals(SLMP_INFO *info) |
| { |
| u16 status = read_reg(info, SR3); |
| u16 gpstatus = read_status_reg(info); |
| u16 testbit; |
| |
| /* clear all serial signals except DTR and RTS */ |
| info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS; |
| |
| /* set serial signal bits to reflect MISR */ |
| |
| if (!(status & BIT3)) |
| info->serial_signals |= SerialSignal_CTS; |
| |
| if ( !(status & BIT2)) |
| info->serial_signals |= SerialSignal_DCD; |
| |
| testbit = BIT1 << (info->port_num * 2); // Port 0..3 RI is GPDATA<1,3,5,7> |
| if (!(gpstatus & testbit)) |
| info->serial_signals |= SerialSignal_RI; |
| |
| testbit = BIT0 << (info->port_num * 2); // Port 0..3 DSR is GPDATA<0,2,4,6> |
| if (!(gpstatus & testbit)) |
| info->serial_signals |= SerialSignal_DSR; |
| } |
| |
| /* Set the state of DTR and RTS based on contents of |
| * serial_signals member of device context. |
| */ |
| static void set_signals(SLMP_INFO *info) |
| { |
| unsigned char RegValue; |
| u16 EnableBit; |
| |
| RegValue = read_reg(info, CTL); |
| if (info->serial_signals & SerialSignal_RTS) |
| RegValue &= ~BIT0; |
| else |
| RegValue |= BIT0; |
| write_reg(info, CTL, RegValue); |
| |
| // Port 0..3 DTR is ctrl reg <1,3,5,7> |
| EnableBit = BIT1 << (info->port_num*2); |
| if (info->serial_signals & SerialSignal_DTR) |
| info->port_array[0]->ctrlreg_value &= ~EnableBit; |
| else |
| info->port_array[0]->ctrlreg_value |= EnableBit; |
| write_control_reg(info); |
| } |
| |
| /*******************/ |
| /* DMA Buffer Code */ |
| /*******************/ |
| |
| /* Set the count for all receive buffers to SCABUFSIZE |
| * and set the current buffer to the first buffer. This effectively |
| * makes all buffers free and discards any data in buffers. |
| */ |
| static void rx_reset_buffers(SLMP_INFO *info) |
| { |
| rx_free_frame_buffers(info, 0, info->rx_buf_count - 1); |
| } |
| |
| /* Free the buffers used by a received frame |
| * |
| * info pointer to device instance data |
| * first index of 1st receive buffer of frame |
| * last index of last receive buffer of frame |
| */ |
| static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last) |
| { |
| bool done = false; |
| |
| while(!done) { |
| /* reset current buffer for reuse */ |
| info->rx_buf_list[first].status = 0xff; |
| |
| if (first == last) { |
| done = true; |
| /* set new last rx descriptor address */ |
| write_reg16(info, RXDMA + EDA, info->rx_buf_list_ex[first].phys_entry); |
| } |
| |
| first++; |
| if (first == info->rx_buf_count) |
| first = 0; |
| } |
| |
| /* set current buffer to next buffer after last buffer of frame */ |
| info->current_rx_buf = first; |
| } |
| |
| /* Return a received frame from the receive DMA buffers. |
| * Only frames received without errors are returned. |
| * |
| * Return Value: true if frame returned, otherwise false |
| */ |
| static bool rx_get_frame(SLMP_INFO *info) |
| { |
| unsigned int StartIndex, EndIndex; /* index of 1st and last buffers of Rx frame */ |
| unsigned short status; |
| unsigned int framesize = 0; |
| bool ReturnCode = false; |
| unsigned long flags; |
| struct tty_struct *tty = info->port.tty; |
| unsigned char addr_field = 0xff; |
| SCADESC *desc; |
| SCADESC_EX *desc_ex; |
| |
| CheckAgain: |
| /* assume no frame returned, set zero length */ |
| framesize = 0; |
| addr_field = 0xff; |
| |
| /* |
| * current_rx_buf points to the 1st buffer of the next available |
| * receive frame. To find the last buffer of the frame look for |
| * a non-zero status field in the buffer entries. (The status |
| * field is set by the 16C32 after completing a receive frame. |
| */ |
| StartIndex = EndIndex = info->current_rx_buf; |
| |
| for ( ;; ) { |
| desc = &info->rx_buf_list[EndIndex]; |
| desc_ex = &info->rx_buf_list_ex[EndIndex]; |
| |
| if (desc->status == 0xff) |
| goto Cleanup; /* current desc still in use, no frames available */ |
| |
| if (framesize == 0 && info->params.addr_filter != 0xff) |
| addr_field = desc_ex->virt_addr[0]; |
| |
| framesize += desc->length; |
| |
| /* Status != 0 means last buffer of frame */ |
| if (desc->status) |
| break; |
| |
| EndIndex++; |
| if (EndIndex == info->rx_buf_count) |
| EndIndex = 0; |
| |
| if (EndIndex == info->current_rx_buf) { |
| /* all buffers have been 'used' but none mark */ |
| /* the end of a frame. Reset buffers and receiver. */ |
| if ( info->rx_enabled ){ |
| spin_lock_irqsave(&info->lock,flags); |
| rx_start(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| goto Cleanup; |
| } |
| |
| } |
| |
| /* check status of receive frame */ |
| |
| /* frame status is byte stored after frame data |
| * |
| * 7 EOM (end of msg), 1 = last buffer of frame |
| * 6 Short Frame, 1 = short frame |
| * 5 Abort, 1 = frame aborted |
| * 4 Residue, 1 = last byte is partial |
| * 3 Overrun, 1 = overrun occurred during frame reception |
| * 2 CRC, 1 = CRC error detected |
| * |
| */ |
| status = desc->status; |
| |
| /* ignore CRC bit if not using CRC (bit is undefined) */ |
| /* Note:CRC is not save to data buffer */ |
| if (info->params.crc_type == HDLC_CRC_NONE) |
| status &= ~BIT2; |
| |
| if (framesize == 0 || |
| (addr_field != 0xff && addr_field != info->params.addr_filter)) { |
| /* discard 0 byte frames, this seems to occur sometime |
| * when remote is idling flags. |
| */ |
| rx_free_frame_buffers(info, StartIndex, EndIndex); |
| goto CheckAgain; |
| } |
| |
| if (framesize < 2) |
| status |= BIT6; |
| |
| if (status & (BIT6+BIT5+BIT3+BIT2)) { |
| /* received frame has errors, |
| * update counts and mark frame size as 0 |
| */ |
| if (status & BIT6) |
| info->icount.rxshort++; |
| else if (status & BIT5) |
| info->icount.rxabort++; |
| else if (status & BIT3) |
| info->icount.rxover++; |
| else |
| info->icount.rxcrc++; |
| |
| framesize = 0; |
| #if SYNCLINK_GENERIC_HDLC |
| { |
| info->netdev->stats.rx_errors++; |
| info->netdev->stats.rx_frame_errors++; |
| } |
| #endif |
| } |
| |
| if ( debug_level >= DEBUG_LEVEL_BH ) |
| printk("%s(%d):%s rx_get_frame() status=%04X size=%d\n", |
| __FILE__,__LINE__,info->device_name,status,framesize); |
| |
| if ( debug_level >= DEBUG_LEVEL_DATA ) |
| trace_block(info,info->rx_buf_list_ex[StartIndex].virt_addr, |
| min_t(unsigned int, framesize, SCABUFSIZE), 0); |
| |
| if (framesize) { |
| if (framesize > info->max_frame_size) |
| info->icount.rxlong++; |
| else { |
| /* copy dma buffer(s) to contiguous intermediate buffer */ |
| int copy_count = framesize; |
| int index = StartIndex; |
| unsigned char *ptmp = info->tmp_rx_buf; |
| info->tmp_rx_buf_count = framesize; |
| |
| info->icount.rxok++; |
| |
| while(copy_count) { |
| int partial_count = min(copy_count,SCABUFSIZE); |
| memcpy( ptmp, |
| info->rx_buf_list_ex[index].virt_addr, |
| partial_count ); |
| ptmp += partial_count; |
| copy_count -= partial_count; |
| |
| if ( ++index == info->rx_buf_count ) |
| index = 0; |
| } |
| |
| #if SYNCLINK_GENERIC_HDLC |
| if (info->netcount) |
| hdlcdev_rx(info,info->tmp_rx_buf,framesize); |
| else |
| #endif |
| ldisc_receive_buf(tty,info->tmp_rx_buf, |
| info->flag_buf, framesize); |
| } |
| } |
| /* Free the buffers used by this frame. */ |
| rx_free_frame_buffers( info, StartIndex, EndIndex ); |
| |
| ReturnCode = true; |
| |
| Cleanup: |
| if ( info->rx_enabled && info->rx_overflow ) { |
| /* Receiver is enabled, but needs to restarted due to |
| * rx buffer overflow. If buffers are empty, restart receiver. |
| */ |
| if (info->rx_buf_list[EndIndex].status == 0xff) { |
| spin_lock_irqsave(&info->lock,flags); |
| rx_start(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| } |
| } |
| |
| return ReturnCode; |
| } |
| |
| /* load the transmit DMA buffer with data |
| */ |
| static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count) |
| { |
| unsigned short copy_count; |
| unsigned int i = 0; |
| SCADESC *desc; |
| SCADESC_EX *desc_ex; |
| |
| if ( debug_level >= DEBUG_LEVEL_DATA ) |
| trace_block(info, buf, min_t(unsigned int, count, SCABUFSIZE), 1); |
| |
| /* Copy source buffer to one or more DMA buffers, starting with |
| * the first transmit dma buffer. |
| */ |
| for(i=0;;) |
| { |
| copy_count = min_t(unsigned int, count, SCABUFSIZE); |
| |
| desc = &info->tx_buf_list[i]; |
| desc_ex = &info->tx_buf_list_ex[i]; |
| |
| load_pci_memory(info, desc_ex->virt_addr,buf,copy_count); |
| |
| desc->length = copy_count; |
| desc->status = 0; |
| |
| buf += copy_count; |
| count -= copy_count; |
| |
| if (!count) |
| break; |
| |
| i++; |
| if (i >= info->tx_buf_count) |
| i = 0; |
| } |
| |
| info->tx_buf_list[i].status = 0x81; /* set EOM and EOT status */ |
| info->last_tx_buf = ++i; |
| } |
| |
| static bool register_test(SLMP_INFO *info) |
| { |
| static unsigned char testval[] = {0x00, 0xff, 0xaa, 0x55, 0x69, 0x96}; |
| static unsigned int count = ARRAY_SIZE(testval); |
| unsigned int i; |
| bool rc = true; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| reset_port(info); |
| |
| /* assume failure */ |
| info->init_error = DiagStatus_AddressFailure; |
| |
| /* Write bit patterns to various registers but do it out of */ |
| /* sync, then read back and verify values. */ |
| |
| for (i = 0 ; i < count ; i++) { |
| write_reg(info, TMC, testval[i]); |
| write_reg(info, IDL, testval[(i+1)%count]); |
| write_reg(info, SA0, testval[(i+2)%count]); |
| write_reg(info, SA1, testval[(i+3)%count]); |
| |
| if ( (read_reg(info, TMC) != testval[i]) || |
| (read_reg(info, IDL) != testval[(i+1)%count]) || |
| (read_reg(info, SA0) != testval[(i+2)%count]) || |
| (read_reg(info, SA1) != testval[(i+3)%count]) ) |
| { |
| rc = false; |
| break; |
| } |
| } |
| |
| reset_port(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| return rc; |
| } |
| |
| static bool irq_test(SLMP_INFO *info) |
| { |
| unsigned long timeout; |
| unsigned long flags; |
| |
| unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0; |
| |
| spin_lock_irqsave(&info->lock,flags); |
| reset_port(info); |
| |
| /* assume failure */ |
| info->init_error = DiagStatus_IrqFailure; |
| info->irq_occurred = false; |
| |
| /* setup timer0 on SCA0 to interrupt */ |
| |
| /* IER2<7..4> = timer<3..0> interrupt enables (1=enabled) */ |
| write_reg(info, IER2, (unsigned char)((info->port_num & 1) ? BIT6 : BIT4)); |
| |
| write_reg(info, (unsigned char)(timer + TEPR), 0); /* timer expand prescale */ |
| write_reg16(info, (unsigned char)(timer + TCONR), 1); /* timer constant */ |
| |
| |
| /* TMCS, Timer Control/Status Register |
| * |
| * 07 CMF, Compare match flag (read only) 1=match |
| * 06 ECMI, CMF Interrupt Enable: 1=enabled |
| * 05 Reserved, must be 0 |
| * 04 TME, Timer Enable |
| * 03..00 Reserved, must be 0 |
| * |
| * 0101 0000 |
| */ |
| write_reg(info, (unsigned char)(timer + TMCS), 0x50); |
| |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| timeout=100; |
| while( timeout-- && !info->irq_occurred ) { |
| msleep_interruptible(10); |
| } |
| |
| spin_lock_irqsave(&info->lock,flags); |
| reset_port(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| return info->irq_occurred; |
| } |
| |
| /* initialize individual SCA device (2 ports) |
| */ |
| static bool sca_init(SLMP_INFO *info) |
| { |
| /* set wait controller to single mem partition (low), no wait states */ |
| write_reg(info, PABR0, 0); /* wait controller addr boundary 0 */ |
| write_reg(info, PABR1, 0); /* wait controller addr boundary 1 */ |
| write_reg(info, WCRL, 0); /* wait controller low range */ |
| write_reg(info, WCRM, 0); /* wait controller mid range */ |
| write_reg(info, WCRH, 0); /* wait controller high range */ |
| |
| /* DPCR, DMA Priority Control |
| * |
| * 07..05 Not used, must be 0 |
| * 04 BRC, bus release condition: 0=all transfers complete |
| * 03 CCC, channel change condition: 0=every cycle |
| * 02..00 PR<2..0>, priority 100=round robin |
| * |
| * 00000100 = 0x04 |
| */ |
| write_reg(info, DPCR, dma_priority); |
| |
| /* DMA Master Enable, BIT7: 1=enable all channels */ |
| write_reg(info, DMER, 0x80); |
| |
| /* enable all interrupt classes */ |
| write_reg(info, IER0, 0xff); /* TxRDY,RxRDY,TxINT,RxINT (ports 0-1) */ |
| write_reg(info, IER1, 0xff); /* DMIB,DMIA (channels 0-3) */ |
| write_reg(info, IER2, 0xf0); /* TIRQ (timers 0-3) */ |
| |
| /* ITCR, interrupt control register |
| * 07 IPC, interrupt priority, 0=MSCI->DMA |
| * 06..05 IAK<1..0>, Acknowledge cycle, 00=non-ack cycle |
| * 04 VOS, Vector Output, 0=unmodified vector |
| * 03..00 Reserved, must be 0 |
| */ |
| write_reg(info, ITCR, 0); |
| |
| return true; |
| } |
| |
| /* initialize adapter hardware |
| */ |
| static bool init_adapter(SLMP_INFO *info) |
| { |
| int i; |
| |
| /* Set BIT30 of Local Control Reg 0x50 to reset SCA */ |
| volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50); |
| u32 readval; |
| |
| info->misc_ctrl_value |= BIT30; |
| *MiscCtrl = info->misc_ctrl_value; |
| |
| /* |
| * Force at least 170ns delay before clearing |
| * reset bit. Each read from LCR takes at least |
| * 30ns so 10 times for 300ns to be safe. |
| */ |
| for(i=0;i<10;i++) |
| readval = *MiscCtrl; |
| |
| info->misc_ctrl_value &= ~BIT30; |
| *MiscCtrl = info->misc_ctrl_value; |
| |
| /* init control reg (all DTRs off, all clksel=input) */ |
| info->ctrlreg_value = 0xaa; |
| write_control_reg(info); |
| |
| { |
| volatile u32 *LCR1BRDR = (u32 *)(info->lcr_base + 0x2c); |
| lcr1_brdr_value &= ~(BIT5 + BIT4 + BIT3); |
| |
| switch(read_ahead_count) |
| { |
| case 16: |
| lcr1_brdr_value |= BIT5 + BIT4 + BIT3; |
| break; |
| case 8: |
| lcr1_brdr_value |= BIT5 + BIT4; |
| break; |
| case 4: |
| lcr1_brdr_value |= BIT5 + BIT3; |
| break; |
| case 0: |
| lcr1_brdr_value |= BIT5; |
| break; |
| } |
| |
| *LCR1BRDR = lcr1_brdr_value; |
| *MiscCtrl = misc_ctrl_value; |
| } |
| |
| sca_init(info->port_array[0]); |
| sca_init(info->port_array[2]); |
| |
| return true; |
| } |
| |
| /* Loopback an HDLC frame to test the hardware |
| * interrupt and DMA functions. |
| */ |
| static bool loopback_test(SLMP_INFO *info) |
| { |
| #define TESTFRAMESIZE 20 |
| |
| unsigned long timeout; |
| u16 count = TESTFRAMESIZE; |
| unsigned char buf[TESTFRAMESIZE]; |
| bool rc = false; |
| unsigned long flags; |
| |
| struct tty_struct *oldtty = info->port.tty; |
| u32 speed = info->params.clock_speed; |
| |
| info->params.clock_speed = 3686400; |
| info->port.tty = NULL; |
| |
| /* assume failure */ |
| info->init_error = DiagStatus_DmaFailure; |
| |
| /* build and send transmit frame */ |
| for (count = 0; count < TESTFRAMESIZE;++count) |
| buf[count] = (unsigned char)count; |
| |
| memset(info->tmp_rx_buf,0,TESTFRAMESIZE); |
| |
| /* program hardware for HDLC and enabled receiver */ |
| spin_lock_irqsave(&info->lock,flags); |
| hdlc_mode(info); |
| enable_loopback(info,1); |
| rx_start(info); |
| info->tx_count = count; |
| tx_load_dma_buffer(info,buf,count); |
| tx_start(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| /* wait for receive complete */ |
| /* Set a timeout for waiting for interrupt. */ |
| for ( timeout = 100; timeout; --timeout ) { |
| msleep_interruptible(10); |
| |
| if (rx_get_frame(info)) { |
| rc = true; |
| break; |
| } |
| } |
| |
| /* verify received frame length and contents */ |
| if (rc && |
| ( info->tmp_rx_buf_count != count || |
| memcmp(buf, info->tmp_rx_buf,count))) { |
| rc = false; |
| } |
| |
| spin_lock_irqsave(&info->lock,flags); |
| reset_adapter(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| info->params.clock_speed = speed; |
| info->port.tty = oldtty; |
| |
| return rc; |
| } |
| |
| /* Perform diagnostics on hardware |
| */ |
| static int adapter_test( SLMP_INFO *info ) |
| { |
| unsigned long flags; |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk( "%s(%d):Testing device %s\n", |
| __FILE__,__LINE__,info->device_name ); |
| |
| spin_lock_irqsave(&info->lock,flags); |
| init_adapter(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| info->port_array[0]->port_count = 0; |
| |
| if ( register_test(info->port_array[0]) && |
| register_test(info->port_array[1])) { |
| |
| info->port_array[0]->port_count = 2; |
| |
| if ( register_test(info->port_array[2]) && |
| register_test(info->port_array[3]) ) |
| info->port_array[0]->port_count += 2; |
| } |
| else { |
| printk( "%s(%d):Register test failure for device %s Addr=%08lX\n", |
| __FILE__,__LINE__,info->device_name, (unsigned long)(info->phys_sca_base)); |
| return -ENODEV; |
| } |
| |
| if ( !irq_test(info->port_array[0]) || |
| !irq_test(info->port_array[1]) || |
| (info->port_count == 4 && !irq_test(info->port_array[2])) || |
| (info->port_count == 4 && !irq_test(info->port_array[3]))) { |
| printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n", |
| __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) ); |
| return -ENODEV; |
| } |
| |
| if (!loopback_test(info->port_array[0]) || |
| !loopback_test(info->port_array[1]) || |
| (info->port_count == 4 && !loopback_test(info->port_array[2])) || |
| (info->port_count == 4 && !loopback_test(info->port_array[3]))) { |
| printk( "%s(%d):DMA test failure for device %s\n", |
| __FILE__,__LINE__,info->device_name); |
| return -ENODEV; |
| } |
| |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk( "%s(%d):device %s passed diagnostics\n", |
| __FILE__,__LINE__,info->device_name ); |
| |
| info->port_array[0]->init_error = 0; |
| info->port_array[1]->init_error = 0; |
| if ( info->port_count > 2 ) { |
| info->port_array[2]->init_error = 0; |
| info->port_array[3]->init_error = 0; |
| } |
| |
| return 0; |
| } |
| |
| /* Test the shared memory on a PCI adapter. |
| */ |
| static bool memory_test(SLMP_INFO *info) |
| { |
| static unsigned long testval[] = { 0x0, 0x55555555, 0xaaaaaaaa, |
| 0x66666666, 0x99999999, 0xffffffff, 0x12345678 }; |
| unsigned long count = ARRAY_SIZE(testval); |
| unsigned long i; |
| unsigned long limit = SCA_MEM_SIZE/sizeof(unsigned long); |
| unsigned long * addr = (unsigned long *)info->memory_base; |
| |
| /* Test data lines with test pattern at one location. */ |
| |
| for ( i = 0 ; i < count ; i++ ) { |
| *addr = testval[i]; |
| if ( *addr != testval[i] ) |
| return false; |
| } |
| |
| /* Test address lines with incrementing pattern over */ |
| /* entire address range. */ |
| |
| for ( i = 0 ; i < limit ; i++ ) { |
| *addr = i * 4; |
| addr++; |
| } |
| |
| addr = (unsigned long *)info->memory_base; |
| |
| for ( i = 0 ; i < limit ; i++ ) { |
| if ( *addr != i * 4 ) |
| return false; |
| addr++; |
| } |
| |
| memset( info->memory_base, 0, SCA_MEM_SIZE ); |
| return true; |
| } |
| |
| /* Load data into PCI adapter shared memory. |
| * |
| * The PCI9050 releases control of the local bus |
| * after completing the current read or write operation. |
| * |
| * While the PCI9050 write FIFO not empty, the |
| * PCI9050 treats all of the writes as a single transaction |
| * and does not release the bus. This causes DMA latency problems |
| * at high speeds when copying large data blocks to the shared memory. |
| * |
| * This function breaks a write into multiple transations by |
| * interleaving a read which flushes the write FIFO and 'completes' |
| * the write transation. This allows any pending DMA request to gain control |
| * of the local bus in a timely fasion. |
| */ |
| static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count) |
| { |
| /* A load interval of 16 allows for 4 32-bit writes at */ |
| /* 136ns each for a maximum latency of 542ns on the local bus.*/ |
| |
| unsigned short interval = count / sca_pci_load_interval; |
| unsigned short i; |
| |
| for ( i = 0 ; i < interval ; i++ ) |
| { |
| memcpy(dest, src, sca_pci_load_interval); |
| read_status_reg(info); |
| dest += sca_pci_load_interval; |
| src += sca_pci_load_interval; |
| } |
| |
| memcpy(dest, src, count % sca_pci_load_interval); |
| } |
| |
| static void trace_block(SLMP_INFO *info,const char* data, int count, int xmit) |
| { |
| int i; |
| int linecount; |
| if (xmit) |
| printk("%s tx data:\n",info->device_name); |
| else |
| printk("%s rx data:\n",info->device_name); |
| |
| while(count) { |
| if (count > 16) |
| linecount = 16; |
| else |
| linecount = count; |
| |
| for(i=0;i<linecount;i++) |
| printk("%02X ",(unsigned char)data[i]); |
| for(;i<17;i++) |
| printk(" "); |
| for(i=0;i<linecount;i++) { |
| if (data[i]>=040 && data[i]<=0176) |
| printk("%c",data[i]); |
| else |
| printk("."); |
| } |
| printk("\n"); |
| |
| data += linecount; |
| count -= linecount; |
| } |
| } /* end of trace_block() */ |
| |
| /* called when HDLC frame times out |
| * update stats and do tx completion processing |
| */ |
| static void tx_timeout(unsigned long context) |
| { |
| SLMP_INFO *info = (SLMP_INFO*)context; |
| unsigned long flags; |
| |
| if ( debug_level >= DEBUG_LEVEL_INFO ) |
| printk( "%s(%d):%s tx_timeout()\n", |
| __FILE__,__LINE__,info->device_name); |
| if(info->tx_active && info->params.mode == MGSL_MODE_HDLC) { |
| info->icount.txtimeout++; |
| } |
| spin_lock_irqsave(&info->lock,flags); |
| info->tx_active = false; |
| info->tx_count = info->tx_put = info->tx_get = 0; |
| |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| #if SYNCLINK_GENERIC_HDLC |
| if (info->netcount) |
| hdlcdev_tx_done(info); |
| else |
| #endif |
| bh_transmit(info); |
| } |
| |
| /* called to periodically check the DSR/RI modem signal input status |
| */ |
| static void status_timeout(unsigned long context) |
| { |
| u16 status = 0; |
| SLMP_INFO *info = (SLMP_INFO*)context; |
| unsigned long flags; |
| unsigned char delta; |
| |
| |
| spin_lock_irqsave(&info->lock,flags); |
| get_signals(info); |
| spin_unlock_irqrestore(&info->lock,flags); |
| |
| /* check for DSR/RI state change */ |
| |
| delta = info->old_signals ^ info->serial_signals; |
| info->old_signals = info->serial_signals; |
| |
| if (delta & SerialSignal_DSR) |
| status |= MISCSTATUS_DSR_LATCHED|(info->serial_signals&SerialSignal_DSR); |
| |
| if (delta & SerialSignal_RI) |
| status |= MISCSTATUS_RI_LATCHED|(info->serial_signals&SerialSignal_RI); |
| |
| if (delta & SerialSignal_DCD) |
| status |= MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD); |
| |
| if (delta & SerialSignal_CTS) |
| status |= MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS); |
| |
| if (status) |
| isr_io_pin(info,status); |
| |
| mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10)); |
| } |
| |
| |
| /* Register Access Routines - |
| * All registers are memory mapped |
| */ |
| #define CALC_REGADDR() \ |
| unsigned char * RegAddr = (unsigned char*)(info->sca_base + Addr); \ |
| if (info->port_num > 1) \ |
| RegAddr += 256; /* port 0-1 SCA0, 2-3 SCA1 */ \ |
| if ( info->port_num & 1) { \ |
| if (Addr > 0x7f) \ |
| RegAddr += 0x40; /* DMA access */ \ |
| else if (Addr > 0x1f && Addr < 0x60) \ |
| RegAddr += 0x20; /* MSCI access */ \ |
| } |
| |
| |
| static unsigned char read_reg(SLMP_INFO * info, unsigned char Addr) |
| { |
| CALC_REGADDR(); |
| return *RegAddr; |
| } |
| static void write_reg(SLMP_INFO * info, unsigned char Addr, unsigned char Value) |
| { |
| CALC_REGADDR(); |
| *RegAddr = Value; |
| } |
| |
| static u16 read_reg16(SLMP_INFO * info, unsigned char Addr) |
| { |
| CALC_REGADDR(); |
| return *((u16 *)RegAddr); |
| } |
| |
| static void write_reg16(SLMP_INFO * info, unsigned char Addr, u16 Value) |
| { |
| CALC_REGADDR(); |
| *((u16 *)RegAddr) = Value; |
| } |
| |
| static unsigned char read_status_reg(SLMP_INFO * info) |
| { |
| unsigned char *RegAddr = (unsigned char *)info->statctrl_base; |
| return *RegAddr; |
| } |
| |
| static void write_control_reg(SLMP_INFO * info) |
| { |
| unsigned char *RegAddr = (unsigned char *)info->statctrl_base; |
| *RegAddr = info->port_array[0]->ctrlreg_value; |
| } |
| |
| |
| static int __devinit synclinkmp_init_one (struct pci_dev *dev, |
| const struct pci_device_id *ent) |
| { |
| if (pci_enable_device(dev)) { |
| printk("error enabling pci device %p\n", dev); |
| return -EIO; |
| } |
| device_init( ++synclinkmp_adapter_count, dev ); |
| return 0; |
| } |
| |
| static void __devexit synclinkmp_remove_one (struct pci_dev *dev) |
| { |
| } |