| /* |
| * $Id: pmc551.c,v 1.32 2005/11/07 11:14:25 gleixner Exp $ |
| * |
| * PMC551 PCI Mezzanine Ram Device |
| * |
| * Author: |
| * Mark Ferrell <mferrell@mvista.com> |
| * Copyright 1999,2000 Nortel Networks |
| * |
| * License: |
| * As part of this driver was derived from the slram.c driver it |
| * falls under the same license, which is GNU General Public |
| * License v2 |
| * |
| * Description: |
| * This driver is intended to support the PMC551 PCI Ram device |
| * from Ramix Inc. The PMC551 is a PMC Mezzanine module for |
| * cPCI embedded systems. The device contains a single SROM |
| * that initially programs the V370PDC chipset onboard the |
| * device, and various banks of DRAM/SDRAM onboard. This driver |
| * implements this PCI Ram device as an MTD (Memory Technology |
| * Device) so that it can be used to hold a file system, or for |
| * added swap space in embedded systems. Since the memory on |
| * this board isn't as fast as main memory we do not try to hook |
| * it into main memory as that would simply reduce performance |
| * on the system. Using it as a block device allows us to use |
| * it as high speed swap or for a high speed disk device of some |
| * sort. Which becomes very useful on diskless systems in the |
| * embedded market I might add. |
| * |
| * Notes: |
| * Due to what I assume is more buggy SROM, the 64M PMC551 I |
| * have available claims that all 4 of it's DRAM banks have 64M |
| * of ram configured (making a grand total of 256M onboard). |
| * This is slightly annoying since the BAR0 size reflects the |
| * aperture size, not the dram size, and the V370PDC supplies no |
| * other method for memory size discovery. This problem is |
| * mostly only relevant when compiled as a module, as the |
| * unloading of the module with an aperture size smaller then |
| * the ram will cause the driver to detect the onboard memory |
| * size to be equal to the aperture size when the module is |
| * reloaded. Soooo, to help, the module supports an msize |
| * option to allow the specification of the onboard memory, and |
| * an asize option, to allow the specification of the aperture |
| * size. The aperture must be equal to or less then the memory |
| * size, the driver will correct this if you screw it up. This |
| * problem is not relevant for compiled in drivers as compiled |
| * in drivers only init once. |
| * |
| * Credits: |
| * Saeed Karamooz <saeed@ramix.com> of Ramix INC. for the |
| * initial example code of how to initialize this device and for |
| * help with questions I had concerning operation of the device. |
| * |
| * Most of the MTD code for this driver was originally written |
| * for the slram.o module in the MTD drivers package which |
| * allows the mapping of system memory into an MTD device. |
| * Since the PMC551 memory module is accessed in the same |
| * fashion as system memory, the slram.c code became a very nice |
| * fit to the needs of this driver. All we added was PCI |
| * detection/initialization to the driver and automatically figure |
| * out the size via the PCI detection.o, later changes by Corey |
| * Minyard set up the card to utilize a 1M sliding apature. |
| * |
| * Corey Minyard <minyard@nortelnetworks.com> |
| * * Modified driver to utilize a sliding aperture instead of |
| * mapping all memory into kernel space which turned out to |
| * be very wasteful. |
| * * Located a bug in the SROM's initialization sequence that |
| * made the memory unusable, added a fix to code to touch up |
| * the DRAM some. |
| * |
| * Bugs/FIXME's: |
| * * MUST fix the init function to not spin on a register |
| * waiting for it to set .. this does not safely handle busted |
| * devices that never reset the register correctly which will |
| * cause the system to hang w/ a reboot being the only chance at |
| * recover. [sort of fixed, could be better] |
| * * Add I2C handling of the SROM so we can read the SROM's information |
| * about the aperture size. This should always accurately reflect the |
| * onboard memory size. |
| * * Comb the init routine. It's still a bit cludgy on a few things. |
| */ |
| |
| #include <linux/version.h> |
| #include <linux/config.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <asm/uaccess.h> |
| #include <linux/types.h> |
| #include <linux/sched.h> |
| #include <linux/init.h> |
| #include <linux/ptrace.h> |
| #include <linux/slab.h> |
| #include <linux/string.h> |
| #include <linux/timer.h> |
| #include <linux/major.h> |
| #include <linux/fs.h> |
| #include <linux/ioctl.h> |
| #include <asm/io.h> |
| #include <asm/system.h> |
| #include <linux/pci.h> |
| |
| #ifndef CONFIG_PCI |
| #error Enable PCI in your kernel config |
| #endif |
| |
| #include <linux/mtd/mtd.h> |
| #include <linux/mtd/pmc551.h> |
| #include <linux/mtd/compatmac.h> |
| |
| static struct mtd_info *pmc551list; |
| |
| static int pmc551_erase (struct mtd_info *mtd, struct erase_info *instr) |
| { |
| struct mypriv *priv = mtd->priv; |
| u32 soff_hi, soff_lo; /* start address offset hi/lo */ |
| u32 eoff_hi, eoff_lo; /* end address offset hi/lo */ |
| unsigned long end; |
| u_char *ptr; |
| size_t retlen; |
| |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk(KERN_DEBUG "pmc551_erase(pos:%ld, len:%ld)\n", (long)instr->addr, (long)instr->len); |
| #endif |
| |
| end = instr->addr + instr->len - 1; |
| |
| /* Is it past the end? */ |
| if ( end > mtd->size ) { |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk(KERN_DEBUG "pmc551_erase() out of bounds (%ld > %ld)\n", (long)end, (long)mtd->size); |
| #endif |
| return -EINVAL; |
| } |
| |
| eoff_hi = end & ~(priv->asize - 1); |
| soff_hi = instr->addr & ~(priv->asize - 1); |
| eoff_lo = end & (priv->asize - 1); |
| soff_lo = instr->addr & (priv->asize - 1); |
| |
| pmc551_point (mtd, instr->addr, instr->len, &retlen, &ptr); |
| |
| if ( soff_hi == eoff_hi || mtd->size == priv->asize) { |
| /* The whole thing fits within one access, so just one shot |
| will do it. */ |
| memset(ptr, 0xff, instr->len); |
| } else { |
| /* We have to do multiple writes to get all the data |
| written. */ |
| while (soff_hi != eoff_hi) { |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk( KERN_DEBUG "pmc551_erase() soff_hi: %ld, eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi); |
| #endif |
| memset(ptr, 0xff, priv->asize); |
| if (soff_hi + priv->asize >= mtd->size) { |
| goto out; |
| } |
| soff_hi += priv->asize; |
| pmc551_point (mtd,(priv->base_map0|soff_hi), |
| priv->asize, &retlen, &ptr); |
| } |
| memset (ptr, 0xff, eoff_lo); |
| } |
| |
| out: |
| instr->state = MTD_ERASE_DONE; |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk(KERN_DEBUG "pmc551_erase() done\n"); |
| #endif |
| |
| mtd_erase_callback(instr); |
| return 0; |
| } |
| |
| |
| static int pmc551_point (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf) |
| { |
| struct mypriv *priv = mtd->priv; |
| u32 soff_hi; |
| u32 soff_lo; |
| |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk(KERN_DEBUG "pmc551_point(%ld, %ld)\n", (long)from, (long)len); |
| #endif |
| |
| if (from + len > mtd->size) { |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk(KERN_DEBUG "pmc551_point() out of bounds (%ld > %ld)\n", (long)from+len, (long)mtd->size); |
| #endif |
| return -EINVAL; |
| } |
| |
| soff_hi = from & ~(priv->asize - 1); |
| soff_lo = from & (priv->asize - 1); |
| |
| /* Cheap hack optimization */ |
| if( priv->curr_map0 != from ) { |
| pci_write_config_dword ( priv->dev, PMC551_PCI_MEM_MAP0, |
| (priv->base_map0 | soff_hi) ); |
| priv->curr_map0 = soff_hi; |
| } |
| |
| *mtdbuf = priv->start + soff_lo; |
| *retlen = len; |
| return 0; |
| } |
| |
| |
| static void pmc551_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, size_t len) |
| { |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk(KERN_DEBUG "pmc551_unpoint()\n"); |
| #endif |
| } |
| |
| |
| static int pmc551_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf) |
| { |
| struct mypriv *priv = mtd->priv; |
| u32 soff_hi, soff_lo; /* start address offset hi/lo */ |
| u32 eoff_hi, eoff_lo; /* end address offset hi/lo */ |
| unsigned long end; |
| u_char *ptr; |
| u_char *copyto = buf; |
| |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk(KERN_DEBUG "pmc551_read(pos:%ld, len:%ld) asize: %ld\n", (long)from, (long)len, (long)priv->asize); |
| #endif |
| |
| end = from + len - 1; |
| |
| /* Is it past the end? */ |
| if (end > mtd->size) { |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk(KERN_DEBUG "pmc551_read() out of bounds (%ld > %ld)\n", (long) end, (long)mtd->size); |
| #endif |
| return -EINVAL; |
| } |
| |
| soff_hi = from & ~(priv->asize - 1); |
| eoff_hi = end & ~(priv->asize - 1); |
| soff_lo = from & (priv->asize - 1); |
| eoff_lo = end & (priv->asize - 1); |
| |
| pmc551_point (mtd, from, len, retlen, &ptr); |
| |
| if (soff_hi == eoff_hi) { |
| /* The whole thing fits within one access, so just one shot |
| will do it. */ |
| memcpy(copyto, ptr, len); |
| copyto += len; |
| } else { |
| /* We have to do multiple writes to get all the data |
| written. */ |
| while (soff_hi != eoff_hi) { |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk( KERN_DEBUG "pmc551_read() soff_hi: %ld, eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi); |
| #endif |
| memcpy(copyto, ptr, priv->asize); |
| copyto += priv->asize; |
| if (soff_hi + priv->asize >= mtd->size) { |
| goto out; |
| } |
| soff_hi += priv->asize; |
| pmc551_point (mtd, soff_hi, priv->asize, retlen, &ptr); |
| } |
| memcpy(copyto, ptr, eoff_lo); |
| copyto += eoff_lo; |
| } |
| |
| out: |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk(KERN_DEBUG "pmc551_read() done\n"); |
| #endif |
| *retlen = copyto - buf; |
| return 0; |
| } |
| |
| static int pmc551_write (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf) |
| { |
| struct mypriv *priv = mtd->priv; |
| u32 soff_hi, soff_lo; /* start address offset hi/lo */ |
| u32 eoff_hi, eoff_lo; /* end address offset hi/lo */ |
| unsigned long end; |
| u_char *ptr; |
| const u_char *copyfrom = buf; |
| |
| |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk(KERN_DEBUG "pmc551_write(pos:%ld, len:%ld) asize:%ld\n", (long)to, (long)len, (long)priv->asize); |
| #endif |
| |
| end = to + len - 1; |
| /* Is it past the end? or did the u32 wrap? */ |
| if (end > mtd->size ) { |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk(KERN_DEBUG "pmc551_write() out of bounds (end: %ld, size: %ld, to: %ld)\n", (long) end, (long)mtd->size, (long)to); |
| #endif |
| return -EINVAL; |
| } |
| |
| soff_hi = to & ~(priv->asize - 1); |
| eoff_hi = end & ~(priv->asize - 1); |
| soff_lo = to & (priv->asize - 1); |
| eoff_lo = end & (priv->asize - 1); |
| |
| pmc551_point (mtd, to, len, retlen, &ptr); |
| |
| if (soff_hi == eoff_hi) { |
| /* The whole thing fits within one access, so just one shot |
| will do it. */ |
| memcpy(ptr, copyfrom, len); |
| copyfrom += len; |
| } else { |
| /* We have to do multiple writes to get all the data |
| written. */ |
| while (soff_hi != eoff_hi) { |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk( KERN_DEBUG "pmc551_write() soff_hi: %ld, eoff_hi: %ld\n", (long)soff_hi, (long)eoff_hi); |
| #endif |
| memcpy(ptr, copyfrom, priv->asize); |
| copyfrom += priv->asize; |
| if (soff_hi >= mtd->size) { |
| goto out; |
| } |
| soff_hi += priv->asize; |
| pmc551_point (mtd, soff_hi, priv->asize, retlen, &ptr); |
| } |
| memcpy(ptr, copyfrom, eoff_lo); |
| copyfrom += eoff_lo; |
| } |
| |
| out: |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk(KERN_DEBUG "pmc551_write() done\n"); |
| #endif |
| *retlen = copyfrom - buf; |
| return 0; |
| } |
| |
| /* |
| * Fixup routines for the V370PDC |
| * PCI device ID 0x020011b0 |
| * |
| * This function basicly kick starts the DRAM oboard the card and gets it |
| * ready to be used. Before this is done the device reads VERY erratic, so |
| * much that it can crash the Linux 2.2.x series kernels when a user cat's |
| * /proc/pci .. though that is mainly a kernel bug in handling the PCI DEVSEL |
| * register. FIXME: stop spinning on registers .. must implement a timeout |
| * mechanism |
| * returns the size of the memory region found. |
| */ |
| static u32 fixup_pmc551 (struct pci_dev *dev) |
| { |
| #ifdef CONFIG_MTD_PMC551_BUGFIX |
| u32 dram_data; |
| #endif |
| u32 size, dcmd, cfg, dtmp; |
| u16 cmd, tmp, i; |
| u8 bcmd, counter; |
| |
| /* Sanity Check */ |
| if(!dev) { |
| return -ENODEV; |
| } |
| |
| /* |
| * Attempt to reset the card |
| * FIXME: Stop Spinning registers |
| */ |
| counter=0; |
| /* unlock registers */ |
| pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, 0xA5 ); |
| /* read in old data */ |
| pci_read_config_byte(dev, PMC551_SYS_CTRL_REG, &bcmd ); |
| /* bang the reset line up and down for a few */ |
| for(i=0;i<10;i++) { |
| counter=0; |
| bcmd &= ~0x80; |
| while(counter++ < 100) { |
| pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd); |
| } |
| counter=0; |
| bcmd |= 0x80; |
| while(counter++ < 100) { |
| pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd); |
| } |
| } |
| bcmd |= (0x40|0x20); |
| pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd); |
| |
| /* |
| * Take care and turn off the memory on the device while we |
| * tweak the configurations |
| */ |
| pci_read_config_word(dev, PCI_COMMAND, &cmd); |
| tmp = cmd & ~(PCI_COMMAND_IO|PCI_COMMAND_MEMORY); |
| pci_write_config_word(dev, PCI_COMMAND, tmp); |
| |
| /* |
| * Disable existing aperture before probing memory size |
| */ |
| pci_read_config_dword(dev, PMC551_PCI_MEM_MAP0, &dcmd); |
| dtmp=(dcmd|PMC551_PCI_MEM_MAP_ENABLE|PMC551_PCI_MEM_MAP_REG_EN); |
| pci_write_config_dword(dev, PMC551_PCI_MEM_MAP0, dtmp); |
| /* |
| * Grab old BAR0 config so that we can figure out memory size |
| * This is another bit of kludge going on. The reason for the |
| * redundancy is I am hoping to retain the original configuration |
| * previously assigned to the card by the BIOS or some previous |
| * fixup routine in the kernel. So we read the old config into cfg, |
| * then write all 1's to the memory space, read back the result into |
| * "size", and then write back all the old config. |
| */ |
| pci_read_config_dword( dev, PCI_BASE_ADDRESS_0, &cfg ); |
| #ifndef CONFIG_MTD_PMC551_BUGFIX |
| pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, ~0 ); |
| pci_read_config_dword( dev, PCI_BASE_ADDRESS_0, &size ); |
| size = (size&PCI_BASE_ADDRESS_MEM_MASK); |
| size &= ~(size-1); |
| pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, cfg ); |
| #else |
| /* |
| * Get the size of the memory by reading all the DRAM size values |
| * and adding them up. |
| * |
| * KLUDGE ALERT: the boards we are using have invalid column and |
| * row mux values. We fix them here, but this will break other |
| * memory configurations. |
| */ |
| pci_read_config_dword(dev, PMC551_DRAM_BLK0, &dram_data); |
| size = PMC551_DRAM_BLK_GET_SIZE(dram_data); |
| dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5); |
| dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9); |
| pci_write_config_dword(dev, PMC551_DRAM_BLK0, dram_data); |
| |
| pci_read_config_dword(dev, PMC551_DRAM_BLK1, &dram_data); |
| size += PMC551_DRAM_BLK_GET_SIZE(dram_data); |
| dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5); |
| dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9); |
| pci_write_config_dword(dev, PMC551_DRAM_BLK1, dram_data); |
| |
| pci_read_config_dword(dev, PMC551_DRAM_BLK2, &dram_data); |
| size += PMC551_DRAM_BLK_GET_SIZE(dram_data); |
| dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5); |
| dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9); |
| pci_write_config_dword(dev, PMC551_DRAM_BLK2, dram_data); |
| |
| pci_read_config_dword(dev, PMC551_DRAM_BLK3, &dram_data); |
| size += PMC551_DRAM_BLK_GET_SIZE(dram_data); |
| dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5); |
| dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9); |
| pci_write_config_dword(dev, PMC551_DRAM_BLK3, dram_data); |
| |
| /* |
| * Oops .. something went wrong |
| */ |
| if( (size &= PCI_BASE_ADDRESS_MEM_MASK) == 0) { |
| return -ENODEV; |
| } |
| #endif /* CONFIG_MTD_PMC551_BUGFIX */ |
| |
| if ((cfg&PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_MEMORY) { |
| return -ENODEV; |
| } |
| |
| /* |
| * Precharge Dram |
| */ |
| pci_write_config_word( dev, PMC551_SDRAM_MA, 0x0400 ); |
| pci_write_config_word( dev, PMC551_SDRAM_CMD, 0x00bf ); |
| |
| /* |
| * Wait until command has gone through |
| * FIXME: register spinning issue |
| */ |
| do { pci_read_config_word( dev, PMC551_SDRAM_CMD, &cmd ); |
| if(counter++ > 100)break; |
| } while ( (PCI_COMMAND_IO) & cmd ); |
| |
| /* |
| * Turn on auto refresh |
| * The loop is taken directly from Ramix's example code. I assume that |
| * this must be held high for some duration of time, but I can find no |
| * documentation refrencing the reasons why. |
| */ |
| for ( i = 1; i<=8 ; i++) { |
| pci_write_config_word (dev, PMC551_SDRAM_CMD, 0x0df); |
| |
| /* |
| * Make certain command has gone through |
| * FIXME: register spinning issue |
| */ |
| counter=0; |
| do { pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd); |
| if(counter++ > 100)break; |
| } while ( (PCI_COMMAND_IO) & cmd ); |
| } |
| |
| pci_write_config_word ( dev, PMC551_SDRAM_MA, 0x0020); |
| pci_write_config_word ( dev, PMC551_SDRAM_CMD, 0x0ff); |
| |
| /* |
| * Wait until command completes |
| * FIXME: register spinning issue |
| */ |
| counter=0; |
| do { pci_read_config_word ( dev, PMC551_SDRAM_CMD, &cmd); |
| if(counter++ > 100)break; |
| } while ( (PCI_COMMAND_IO) & cmd ); |
| |
| pci_read_config_dword ( dev, PMC551_DRAM_CFG, &dcmd); |
| dcmd |= 0x02000000; |
| pci_write_config_dword ( dev, PMC551_DRAM_CFG, dcmd); |
| |
| /* |
| * Check to make certain fast back-to-back, if not |
| * then set it so |
| */ |
| pci_read_config_word( dev, PCI_STATUS, &cmd); |
| if((cmd&PCI_COMMAND_FAST_BACK) == 0) { |
| cmd |= PCI_COMMAND_FAST_BACK; |
| pci_write_config_word( dev, PCI_STATUS, cmd); |
| } |
| |
| /* |
| * Check to make certain the DEVSEL is set correctly, this device |
| * has a tendancy to assert DEVSEL and TRDY when a write is performed |
| * to the memory when memory is read-only |
| */ |
| if((cmd&PCI_STATUS_DEVSEL_MASK) != 0x0) { |
| cmd &= ~PCI_STATUS_DEVSEL_MASK; |
| pci_write_config_word( dev, PCI_STATUS, cmd ); |
| } |
| /* |
| * Set to be prefetchable and put everything back based on old cfg. |
| * it's possible that the reset of the V370PDC nuked the original |
| * setup |
| */ |
| /* |
| cfg |= PCI_BASE_ADDRESS_MEM_PREFETCH; |
| pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, cfg ); |
| */ |
| |
| /* |
| * Turn PCI memory and I/O bus access back on |
| */ |
| pci_write_config_word( dev, PCI_COMMAND, |
| PCI_COMMAND_MEMORY | PCI_COMMAND_IO ); |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| /* |
| * Some screen fun |
| */ |
| printk(KERN_DEBUG "pmc551: %d%c (0x%x) of %sprefetchable memory at 0x%lx\n", |
| (size<1024)?size:(size<1048576)?size>>10:size>>20, |
| (size<1024)?'B':(size<1048576)?'K':'M', |
| size, ((dcmd&(0x1<<3)) == 0)?"non-":"", |
| (dev->resource[0].start)&PCI_BASE_ADDRESS_MEM_MASK ); |
| |
| /* |
| * Check to see the state of the memory |
| */ |
| pci_read_config_dword( dev, PMC551_DRAM_BLK0, &dcmd ); |
| printk(KERN_DEBUG "pmc551: DRAM_BLK0 Flags: %s,%s\n" |
| "pmc551: DRAM_BLK0 Size: %d at %d\n" |
| "pmc551: DRAM_BLK0 Row MUX: %d, Col MUX: %d\n", |
| (((0x1<<1)&dcmd) == 0)?"RW":"RO", |
| (((0x1<<0)&dcmd) == 0)?"Off":"On", |
| PMC551_DRAM_BLK_GET_SIZE(dcmd), |
| ((dcmd>>20)&0x7FF), ((dcmd>>13)&0x7), ((dcmd>>9)&0xF) ); |
| |
| pci_read_config_dword( dev, PMC551_DRAM_BLK1, &dcmd ); |
| printk(KERN_DEBUG "pmc551: DRAM_BLK1 Flags: %s,%s\n" |
| "pmc551: DRAM_BLK1 Size: %d at %d\n" |
| "pmc551: DRAM_BLK1 Row MUX: %d, Col MUX: %d\n", |
| (((0x1<<1)&dcmd) == 0)?"RW":"RO", |
| (((0x1<<0)&dcmd) == 0)?"Off":"On", |
| PMC551_DRAM_BLK_GET_SIZE(dcmd), |
| ((dcmd>>20)&0x7FF), ((dcmd>>13)&0x7), ((dcmd>>9)&0xF) ); |
| |
| pci_read_config_dword( dev, PMC551_DRAM_BLK2, &dcmd ); |
| printk(KERN_DEBUG "pmc551: DRAM_BLK2 Flags: %s,%s\n" |
| "pmc551: DRAM_BLK2 Size: %d at %d\n" |
| "pmc551: DRAM_BLK2 Row MUX: %d, Col MUX: %d\n", |
| (((0x1<<1)&dcmd) == 0)?"RW":"RO", |
| (((0x1<<0)&dcmd) == 0)?"Off":"On", |
| PMC551_DRAM_BLK_GET_SIZE(dcmd), |
| ((dcmd>>20)&0x7FF), ((dcmd>>13)&0x7), ((dcmd>>9)&0xF) ); |
| |
| pci_read_config_dword( dev, PMC551_DRAM_BLK3, &dcmd ); |
| printk(KERN_DEBUG "pmc551: DRAM_BLK3 Flags: %s,%s\n" |
| "pmc551: DRAM_BLK3 Size: %d at %d\n" |
| "pmc551: DRAM_BLK3 Row MUX: %d, Col MUX: %d\n", |
| (((0x1<<1)&dcmd) == 0)?"RW":"RO", |
| (((0x1<<0)&dcmd) == 0)?"Off":"On", |
| PMC551_DRAM_BLK_GET_SIZE(dcmd), |
| ((dcmd>>20)&0x7FF), ((dcmd>>13)&0x7), ((dcmd>>9)&0xF) ); |
| |
| pci_read_config_word( dev, PCI_COMMAND, &cmd ); |
| printk( KERN_DEBUG "pmc551: Memory Access %s\n", |
| (((0x1<<1)&cmd) == 0)?"off":"on" ); |
| printk( KERN_DEBUG "pmc551: I/O Access %s\n", |
| (((0x1<<0)&cmd) == 0)?"off":"on" ); |
| |
| pci_read_config_word( dev, PCI_STATUS, &cmd ); |
| printk( KERN_DEBUG "pmc551: Devsel %s\n", |
| ((PCI_STATUS_DEVSEL_MASK&cmd)==0x000)?"Fast": |
| ((PCI_STATUS_DEVSEL_MASK&cmd)==0x200)?"Medium": |
| ((PCI_STATUS_DEVSEL_MASK&cmd)==0x400)?"Slow":"Invalid" ); |
| |
| printk( KERN_DEBUG "pmc551: %sFast Back-to-Back\n", |
| ((PCI_COMMAND_FAST_BACK&cmd) == 0)?"Not ":"" ); |
| |
| pci_read_config_byte(dev, PMC551_SYS_CTRL_REG, &bcmd ); |
| printk( KERN_DEBUG "pmc551: EEPROM is under %s control\n" |
| "pmc551: System Control Register is %slocked to PCI access\n" |
| "pmc551: System Control Register is %slocked to EEPROM access\n", |
| (bcmd&0x1)?"software":"hardware", |
| (bcmd&0x20)?"":"un", (bcmd&0x40)?"":"un"); |
| #endif |
| return size; |
| } |
| |
| /* |
| * Kernel version specific module stuffages |
| */ |
| |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Mark Ferrell <mferrell@mvista.com>"); |
| MODULE_DESCRIPTION(PMC551_VERSION); |
| |
| /* |
| * Stuff these outside the ifdef so as to not bust compiled in driver support |
| */ |
| static int msize=0; |
| #if defined(CONFIG_MTD_PMC551_APERTURE_SIZE) |
| static int asize=CONFIG_MTD_PMC551_APERTURE_SIZE |
| #else |
| static int asize=0; |
| #endif |
| |
| module_param(msize, int, 0); |
| MODULE_PARM_DESC(msize, "memory size in Megabytes [1 - 1024]"); |
| module_param(asize, int, 0); |
| MODULE_PARM_DESC(asize, "aperture size, must be <= memsize [1-1024]"); |
| |
| /* |
| * PMC551 Card Initialization |
| */ |
| static int __init init_pmc551(void) |
| { |
| struct pci_dev *PCI_Device = NULL; |
| struct mypriv *priv; |
| int count, found=0; |
| struct mtd_info *mtd; |
| u32 length = 0; |
| |
| if(msize) { |
| msize = (1 << (ffs(msize) - 1))<<20; |
| if (msize > (1<<30)) { |
| printk(KERN_NOTICE "pmc551: Invalid memory size [%d]\n", msize); |
| return -EINVAL; |
| } |
| } |
| |
| if(asize) { |
| asize = (1 << (ffs(asize) - 1))<<20; |
| if (asize > (1<<30) ) { |
| printk(KERN_NOTICE "pmc551: Invalid aperture size [%d]\n", asize); |
| return -EINVAL; |
| } |
| } |
| |
| printk(KERN_INFO PMC551_VERSION); |
| |
| /* |
| * PCU-bus chipset probe. |
| */ |
| for( count = 0; count < MAX_MTD_DEVICES; count++ ) { |
| |
| if ((PCI_Device = pci_find_device(PCI_VENDOR_ID_V3_SEMI, |
| PCI_DEVICE_ID_V3_SEMI_V370PDC, |
| PCI_Device ) ) == NULL) { |
| break; |
| } |
| |
| printk(KERN_NOTICE "pmc551: Found PCI V370PDC at 0x%lX\n", |
| PCI_Device->resource[0].start); |
| |
| /* |
| * The PMC551 device acts VERY weird if you don't init it |
| * first. i.e. it will not correctly report devsel. If for |
| * some reason the sdram is in a wrote-protected state the |
| * device will DEVSEL when it is written to causing problems |
| * with the oldproc.c driver in |
| * some kernels (2.2.*) |
| */ |
| if((length = fixup_pmc551(PCI_Device)) <= 0) { |
| printk(KERN_NOTICE "pmc551: Cannot init SDRAM\n"); |
| break; |
| } |
| |
| /* |
| * This is needed until the driver is capable of reading the |
| * onboard I2C SROM to discover the "real" memory size. |
| */ |
| if(msize) { |
| length = msize; |
| printk(KERN_NOTICE "pmc551: Using specified memory size 0x%x\n", length); |
| } else { |
| msize = length; |
| } |
| |
| mtd = kmalloc(sizeof(struct mtd_info), GFP_KERNEL); |
| if (!mtd) { |
| printk(KERN_NOTICE "pmc551: Cannot allocate new MTD device.\n"); |
| break; |
| } |
| |
| memset(mtd, 0, sizeof(struct mtd_info)); |
| |
| priv = kmalloc (sizeof(struct mypriv), GFP_KERNEL); |
| if (!priv) { |
| printk(KERN_NOTICE "pmc551: Cannot allocate new MTD device.\n"); |
| kfree(mtd); |
| break; |
| } |
| memset(priv, 0, sizeof(*priv)); |
| mtd->priv = priv; |
| priv->dev = PCI_Device; |
| |
| if(asize > length) { |
| printk(KERN_NOTICE "pmc551: reducing aperture size to fit %dM\n",length>>20); |
| priv->asize = asize = length; |
| } else if (asize == 0 || asize == length) { |
| printk(KERN_NOTICE "pmc551: Using existing aperture size %dM\n", length>>20); |
| priv->asize = asize = length; |
| } else { |
| printk(KERN_NOTICE "pmc551: Using specified aperture size %dM\n", asize>>20); |
| priv->asize = asize; |
| } |
| priv->start = ioremap(((PCI_Device->resource[0].start) |
| & PCI_BASE_ADDRESS_MEM_MASK), |
| priv->asize); |
| |
| if (!priv->start) { |
| printk(KERN_NOTICE "pmc551: Unable to map IO space\n"); |
| kfree(mtd->priv); |
| kfree(mtd); |
| break; |
| } |
| |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk( KERN_DEBUG "pmc551: setting aperture to %d\n", |
| ffs(priv->asize>>20)-1); |
| #endif |
| |
| priv->base_map0 = ( PMC551_PCI_MEM_MAP_REG_EN |
| | PMC551_PCI_MEM_MAP_ENABLE |
| | (ffs(priv->asize>>20)-1)<<4 ); |
| priv->curr_map0 = priv->base_map0; |
| pci_write_config_dword ( priv->dev, PMC551_PCI_MEM_MAP0, |
| priv->curr_map0 ); |
| |
| #ifdef CONFIG_MTD_PMC551_DEBUG |
| printk( KERN_DEBUG "pmc551: aperture set to %d\n", |
| (priv->base_map0 & 0xF0)>>4 ); |
| #endif |
| |
| mtd->size = msize; |
| mtd->flags = MTD_CAP_RAM; |
| mtd->erase = pmc551_erase; |
| mtd->read = pmc551_read; |
| mtd->write = pmc551_write; |
| mtd->point = pmc551_point; |
| mtd->unpoint = pmc551_unpoint; |
| mtd->type = MTD_RAM; |
| mtd->name = "PMC551 RAM board"; |
| mtd->erasesize = 0x10000; |
| mtd->owner = THIS_MODULE; |
| |
| if (add_mtd_device(mtd)) { |
| printk(KERN_NOTICE "pmc551: Failed to register new device\n"); |
| iounmap(priv->start); |
| kfree(mtd->priv); |
| kfree(mtd); |
| break; |
| } |
| printk(KERN_NOTICE "Registered pmc551 memory device.\n"); |
| printk(KERN_NOTICE "Mapped %dM of memory from 0x%p to 0x%p\n", |
| priv->asize>>20, |
| priv->start, |
| priv->start + priv->asize); |
| printk(KERN_NOTICE "Total memory is %d%c\n", |
| (length<1024)?length: |
| (length<1048576)?length>>10:length>>20, |
| (length<1024)?'B':(length<1048576)?'K':'M'); |
| priv->nextpmc551 = pmc551list; |
| pmc551list = mtd; |
| found++; |
| } |
| |
| if( !pmc551list ) { |
| printk(KERN_NOTICE "pmc551: not detected\n"); |
| return -ENODEV; |
| } else { |
| printk(KERN_NOTICE "pmc551: %d pmc551 devices loaded\n", found); |
| return 0; |
| } |
| } |
| |
| /* |
| * PMC551 Card Cleanup |
| */ |
| static void __exit cleanup_pmc551(void) |
| { |
| int found=0; |
| struct mtd_info *mtd; |
| struct mypriv *priv; |
| |
| while((mtd=pmc551list)) { |
| priv = mtd->priv; |
| pmc551list = priv->nextpmc551; |
| |
| if(priv->start) { |
| printk (KERN_DEBUG "pmc551: unmapping %dM starting at 0x%p\n", |
| priv->asize>>20, priv->start); |
| iounmap (priv->start); |
| } |
| |
| kfree (mtd->priv); |
| del_mtd_device (mtd); |
| kfree (mtd); |
| found++; |
| } |
| |
| printk(KERN_NOTICE "pmc551: %d pmc551 devices unloaded\n", found); |
| } |
| |
| module_init(init_pmc551); |
| module_exit(cleanup_pmc551); |