pmc551.c
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- /*
- * $Id: pmc551.c,v 1.20 2002/03/05 13:47:08 dwmw2 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/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 <asm/segment.h>
- #include <stdarg.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>
- #if LINUX_VERSION_CODE > 0x20300
- #define PCI_BASE_ADDRESS(dev) (dev->resource[0].start)
- #else
- #define PCI_BASE_ADDRESS(dev) (dev->base_address[0])
- #endif
- static struct mtd_info *pmc551list;
- static int pmc551_erase (struct mtd_info *mtd, struct erase_info *instr)
- {
- struct mypriv *priv = (struct mypriv *)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: %ldn", (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() donen");
- #endif
- if (instr->callback) {
- (*(instr->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 = (struct mypriv *)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)
- {
- #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 = (struct mypriv *)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: %ldn", (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: %ldn", (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() donen");
- #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 = (struct mypriv *)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:%ldn", (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: %ldn", (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() donen");
- #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%lxn",
- (size<1024)?size:(size<1048576)?size>>10:size>>20,
- (size<1024)?'B':(size<1048576)?'K':'M',
- size, ((dcmd&(0x1<<3)) == 0)?"non-":"",
- PCI_BASE_ADDRESS(dev)&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,%sn"
- "pmc551: DRAM_BLK0 Size: %d at %dn"
- "pmc551: DRAM_BLK0 Row MUX: %d, Col MUX: %dn",
- (((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,%sn"
- "pmc551: DRAM_BLK1 Size: %d at %dn"
- "pmc551: DRAM_BLK1 Row MUX: %d, Col MUX: %dn",
- (((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,%sn"
- "pmc551: DRAM_BLK2 Size: %d at %dn"
- "pmc551: DRAM_BLK2 Row MUX: %d, Col MUX: %dn",
- (((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,%sn"
- "pmc551: DRAM_BLK3 Size: %d at %dn"
- "pmc551: DRAM_BLK3 Row MUX: %d, Col MUX: %dn",
- (((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 %sn",
- (((0x1<<1)&cmd) == 0)?"off":"on" );
- printk( KERN_DEBUG "pmc551: I/O Access %sn",
- (((0x1<<0)&cmd) == 0)?"off":"on" );
- pci_read_config_word( dev, PCI_STATUS, &cmd );
- printk( KERN_DEBUG "pmc551: Devsel %sn",
- ((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-Backn",
- ((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 controln"
- "pmc551: System Control Register is %slocked to PCI accessn"
- "pmc551: System Control Register is %slocked to EEPROM accessn",
- (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);
- MODULE_PARM(msize, "i");
- MODULE_PARM_DESC(msize, "memory size in Megabytes [1 - 1024]");
- MODULE_PARM(asize, "i");
- MODULE_PARM_DESC(asize, "aperture size, must be <= memsize [1-1024]");
- /*
- * 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
- /*
- * PMC551 Card Initialization
- */
- 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);
- if(!pci_present()) {
- printk(KERN_NOTICE "pmc551: PCI not enabled.n");
- return -ENODEV;
- }
- /*
- * 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%lXn",
- PCI_BASE_ADDRESS(PCI_Device));
- /*
- * 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 SDRAMn");
- 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%xn", 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 %dMn",length>>20);
- priv->asize = asize = length;
- } else if (asize == 0 || asize == length) {
- printk(KERN_NOTICE "pmc551: Using existing aperture size %dMn", length>>20);
- priv->asize = asize = length;
- } else {
- printk(KERN_NOTICE "pmc551: Using specified aperture size %dMn", asize>>20);
- priv->asize = asize;
- }
- priv->start = ioremap((PCI_BASE_ADDRESS(PCI_Device)
- & PCI_BASE_ADDRESS_MEM_MASK),
- priv->asize);
-
- if (!priv->start) {
- printk(KERN_NOTICE "pmc551: Unable to map IO spacen");
- kfree(mtd->priv);
- kfree(mtd);
- break;
- }
- #ifdef CONFIG_MTD_PMC551_DEBUG
- printk( KERN_DEBUG "pmc551: setting aperture to %dn",
- 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 %dn",
- (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->module = THIS_MODULE;
- mtd->type = MTD_RAM;
- mtd->name = "PMC551 RAM board";
- mtd->erasesize = 0x10000;
- if (add_mtd_device(mtd)) {
- printk(KERN_NOTICE "pmc551: Failed to register new devicen");
- 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%pn",
- priv->asize>>20,
- priv->start,
- priv->start + priv->asize);
- printk(KERN_NOTICE "Total memory is %d%cn",
- (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 detectedn");
- return -ENODEV;
- } else {
- printk(KERN_NOTICE "pmc551: %d pmc551 devices loadedn", 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 = (struct mypriv *)mtd->priv;
- pmc551list = priv->nextpmc551;
-
- if(priv->start) {
- printk (KERN_DEBUG "pmc551: unmapping %dM starting at 0x%pn",
- 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 unloadedn", found);
- }
- module_init(init_pmc551);
- module_exit(cleanup_pmc551);