| /* |
| * 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 its DRAM banks have 64MiB |
| * of ram configured (making a grand total of 256MiB 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 than |
| * 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/FIXMEs: |
| * * 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/kernel.h> |
| #include <linux/module.h> |
| #include <asm/uaccess.h> |
| #include <linux/types.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> |
| |
| #include <linux/mtd/mtd.h> |
| #include <linux/mtd/pmc551.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, |
| (void **)&ptr, NULL); |
| |
| 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, |
| (void **)&ptr, NULL); |
| } |
| 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, void **virt, resource_size_t *phys) |
| { |
| 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; |
| } |
| |
| /* can we return a physical address with this driver? */ |
| if (phys) |
| 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; |
| } |
| |
| *virt = priv->start + soff_lo; |
| *retlen = len; |
| return 0; |
| } |
| |
| static void pmc551_unpoint(struct mtd_info *mtd, 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, (void **)&ptr, NULL); |
| |
| 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, |
| (void **)&ptr, NULL); |
| } |
| 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, (void **)&ptr, NULL); |
| |
| 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, |
| (void **)&ptr, NULL); |
| } |
| 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 basically 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 int 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 tendency 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%sB (0x%x) of %sprefetchable memory at " |
| "0x%llx\n", (size < 1024) ? size : (size < 1048576) ? |
| size >> 10 : size >> 20, |
| (size < 1024) ? "" : (size < 1048576) ? "Ki" : "Mi", size, |
| ((dcmd & (0x1 << 3)) == 0) ? "non-" : "", |
| (unsigned long long)pci_resource_start(dev, 0)); |
| |
| /* |
| * 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; |
| static int asize = 0; |
| |
| module_param(msize, int, 0); |
| MODULE_PARM_DESC(msize, "memory size in MiB [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 found = 0; |
| struct mtd_info *mtd; |
| int 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 (;;) { |
| |
| if ((PCI_Device = pci_get_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%llx\n", |
| (unsigned long long)pci_resource_start(PCI_Device, 0)); |
| |
| /* |
| * 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 = kzalloc(sizeof(struct mtd_info), GFP_KERNEL); |
| if (!mtd) { |
| printk(KERN_NOTICE "pmc551: Cannot allocate new MTD " |
| "device.\n"); |
| break; |
| } |
| |
| priv = kzalloc(sizeof(struct mypriv), GFP_KERNEL); |
| if (!priv) { |
| printk(KERN_NOTICE "pmc551: Cannot allocate new MTD " |
| "device.\n"); |
| kfree(mtd); |
| break; |
| } |
| 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 = pci_iomap(PCI_Device, 0, 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->writesize = 1; |
| mtd->owner = THIS_MODULE; |
| |
| if (mtd_device_register(mtd, NULL, 0)) { |
| printk(KERN_NOTICE "pmc551: Failed to register new device\n"); |
| pci_iounmap(PCI_Device, priv->start); |
| kfree(mtd->priv); |
| kfree(mtd); |
| break; |
| } |
| |
| /* Keep a reference as the mtd_device_register worked */ |
| pci_dev_get(PCI_Device); |
| |
| printk(KERN_NOTICE "Registered pmc551 memory device.\n"); |
| printk(KERN_NOTICE "Mapped %dMiB 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%sB\n", |
| (length < 1024) ? length : |
| (length < 1048576) ? length >> 10 : length >> 20, |
| (length < 1024) ? "" : (length < 1048576) ? "Ki" : "Mi"); |
| priv->nextpmc551 = pmc551list; |
| pmc551list = mtd; |
| found++; |
| } |
| |
| /* Exited early, reference left over */ |
| if (PCI_Device) |
| pci_dev_put(PCI_Device); |
| |
| 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 %dMiB starting at " |
| "0x%p\n", priv->asize >> 20, priv->start); |
| pci_iounmap(priv->dev, priv->start); |
| } |
| pci_dev_put(priv->dev); |
| |
| kfree(mtd->priv); |
| mtd_device_unregister(mtd); |
| kfree(mtd); |
| found++; |
| } |
| |
| printk(KERN_NOTICE "pmc551: %d pmc551 devices unloaded\n", found); |
| } |
| |
| module_init(init_pmc551); |
| module_exit(cleanup_pmc551); |