| /* |
| * serial.h: Arch-dep definitions for the Etrax100 serial driver. |
| * |
| * Copyright (C) 1998-2007 Axis Communications AB |
| */ |
| |
| #ifndef _ETRAX_SERIAL_H |
| #define _ETRAX_SERIAL_H |
| |
| #include <linux/circ_buf.h> |
| #include <asm/termios.h> |
| #include <asm/dma.h> |
| #include <arch/io_interface_mux.h> |
| |
| /* Software state per channel */ |
| |
| #ifdef __KERNEL__ |
| /* |
| * This is our internal structure for each serial port's state. |
| * |
| * Many fields are paralleled by the structure used by the serial_struct |
| * structure. |
| * |
| * For definitions of the flags field, see tty.h |
| */ |
| |
| #define SERIAL_RECV_DESCRIPTORS 8 |
| |
| struct etrax_recv_buffer { |
| struct etrax_recv_buffer *next; |
| unsigned short length; |
| unsigned char error; |
| unsigned char pad; |
| |
| unsigned char buffer[0]; |
| }; |
| |
| struct e100_serial { |
| struct tty_port port; |
| int baud; |
| volatile u8 *ioport; /* R_SERIALx_CTRL */ |
| u32 irq; /* bitnr in R_IRQ_MASK2 for dmaX_descr */ |
| |
| /* Output registers */ |
| volatile u8 *oclrintradr; /* adr to R_DMA_CHx_CLR_INTR */ |
| volatile u32 *ofirstadr; /* adr to R_DMA_CHx_FIRST */ |
| volatile u8 *ocmdadr; /* adr to R_DMA_CHx_CMD */ |
| const volatile u8 *ostatusadr; /* adr to R_DMA_CHx_STATUS */ |
| |
| /* Input registers */ |
| volatile u8 *iclrintradr; /* adr to R_DMA_CHx_CLR_INTR */ |
| volatile u32 *ifirstadr; /* adr to R_DMA_CHx_FIRST */ |
| volatile u8 *icmdadr; /* adr to R_DMA_CHx_CMD */ |
| volatile u32 *idescradr; /* adr to R_DMA_CHx_DESCR */ |
| |
| int flags; /* defined in tty.h */ |
| |
| u8 rx_ctrl; /* shadow for R_SERIALx_REC_CTRL */ |
| u8 tx_ctrl; /* shadow for R_SERIALx_TR_CTRL */ |
| u8 iseteop; /* bit number for R_SET_EOP for the input dma */ |
| int enabled; /* Set to 1 if the port is enabled in HW config */ |
| |
| u8 dma_out_enabled; /* Set to 1 if DMA should be used */ |
| u8 dma_in_enabled; /* Set to 1 if DMA should be used */ |
| |
| /* end of fields defined in rs_table[] in .c-file */ |
| int dma_owner; |
| unsigned int dma_in_nbr; |
| unsigned int dma_out_nbr; |
| unsigned int dma_in_irq_nbr; |
| unsigned int dma_out_irq_nbr; |
| unsigned long dma_in_irq_flags; |
| unsigned long dma_out_irq_flags; |
| char *dma_in_irq_description; |
| char *dma_out_irq_description; |
| |
| enum cris_io_interface io_if; |
| char *io_if_description; |
| |
| u8 uses_dma_in; /* Set to 1 if DMA is used */ |
| u8 uses_dma_out; /* Set to 1 if DMA is used */ |
| u8 forced_eop; /* a fifo eop has been forced */ |
| int baud_base; /* For special baudrates */ |
| int custom_divisor; /* For special baudrates */ |
| struct etrax_dma_descr tr_descr; |
| struct etrax_dma_descr rec_descr[SERIAL_RECV_DESCRIPTORS]; |
| int cur_rec_descr; |
| |
| volatile int tr_running; /* 1 if output is running */ |
| |
| struct tty_struct *tty; |
| int read_status_mask; |
| int ignore_status_mask; |
| int x_char; /* xon/xoff character */ |
| int close_delay; |
| unsigned short closing_wait; |
| unsigned short closing_wait2; |
| unsigned long event; |
| unsigned long last_active; |
| int line; |
| int type; /* PORT_ETRAX */ |
| int count; /* # of fd on device */ |
| int blocked_open; /* # of blocked opens */ |
| struct circ_buf xmit; |
| struct etrax_recv_buffer *first_recv_buffer; |
| struct etrax_recv_buffer *last_recv_buffer; |
| unsigned int recv_cnt; |
| unsigned int max_recv_cnt; |
| |
| struct work_struct work; |
| struct async_icount icount; /* error-statistics etc.*/ |
| struct ktermios normal_termios; |
| struct ktermios callout_termios; |
| wait_queue_head_t open_wait; |
| wait_queue_head_t close_wait; |
| |
| unsigned long char_time_usec; /* The time for 1 char, in usecs */ |
| unsigned long flush_time_usec; /* How often we should flush */ |
| unsigned long last_tx_active_usec; /* Last tx usec in the jiffies */ |
| unsigned long last_tx_active; /* Last tx time in jiffies */ |
| unsigned long last_rx_active_usec; /* Last rx usec in the jiffies */ |
| unsigned long last_rx_active; /* Last rx time in jiffies */ |
| |
| int break_detected_cnt; |
| int errorcode; |
| |
| #ifdef CONFIG_ETRAX_RS485 |
| struct serial_rs485 rs485; /* RS-485 support */ |
| #endif |
| }; |
| |
| /* this PORT is not in the standard serial.h. it's not actually used for |
| * anything since we only have one type of async serial-port anyway in this |
| * system. |
| */ |
| |
| #define PORT_ETRAX 1 |
| |
| /* |
| * Events are used to schedule things to happen at timer-interrupt |
| * time, instead of at rs interrupt time. |
| */ |
| #define RS_EVENT_WRITE_WAKEUP 0 |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* !_ETRAX_SERIAL_H */ |