[MTD] pmc551 whitespace cleanup
Linux-MTD Mailing List
linux-mtd at lists.infradead.org
Fri Sep 22 05:59:03 EDT 2006
Commit: cdf0a7d16980858e72f5d26bfe48abf01112fab5
Parent: e417fcfb857b809e5dabc9b252ad70f090d553d1
commit cdf0a7d16980858e72f5d26bfe48abf01112fab5
Author: Jiri Slaby <jirislaby at gmail.com>
AuthorDate: Tue Sep 19 21:55:06 2006 +0200
Commit: David Woodhouse <dwmw2 at infradead.org>
CommitDate: Fri Sep 22 10:33:31 2006 +0100
[MTD] pmc551 whitespace cleanup
Spaces were used for indent, there was more than 80 columns per line. Get
rid of that stuff.
Signed-off-by: Jiri Slaby <jirislaby at gmail.com>
Signed-off-by: David Woodhouse <dwmw2 at infradead.org>
---
drivers/mtd/devices/pmc551.c | 1723 +++++++++++++++++++++---------------------
1 files changed, 876 insertions(+), 847 deletions(-)
diff --git a/drivers/mtd/devices/pmc551.c b/drivers/mtd/devices/pmc551.c
dissimilarity index 80%
index a03a8a7..4d40236 100644
--- drivers/mtd/devices/pmc551.c
+++ drivers/mtd/devices/pmc551.c
@@ -1,847 +1,876 @@
-/*
- * $Id: pmc551.c,v 1.32 2005/11/07 11:14:25 gleixner Exp $
- *
- * PMC551 PCI Mezzanine Ram Device
- *
- * Author:
- * Mark Ferrell <mferrell at 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 at 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 at 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/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>
-
-#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%llx\n",
- (size<1024)?size:(size<1048576)?size>>10:size>>20,
- (size<1024)?'B':(size<1048576)?'K':'M',
- size, ((dcmd&(0x1<<3)) == 0)?"non-":"",
- (unsigned long long)((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 at 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_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_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->writesize = 1;
- 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;
- }
-
- /* Keep a reference as the add_mtd_device worked */
- pci_dev_get(PCI_Device);
-
- 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++;
- }
-
- /* 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 %dM starting at 0x%p\n",
- priv->asize>>20, priv->start);
- iounmap (priv->start);
- }
- pci_dev_put(priv->dev);
-
- 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);
+/*
+ * $Id: pmc551.c,v 1.32 2005/11/07 11:14:25 gleixner Exp $
+ *
+ * PMC551 PCI Mezzanine Ram Device
+ *
+ * Author:
+ * Mark Ferrell <mferrell at 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 at 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 at 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/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>
+
+#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%llx\n", (size < 1024) ? size : (size < 1048576) ?
+ size >> 10 : size >> 20,
+ (size < 1024) ? 'B' : (size < 1048576) ? 'K' : 'M', size,
+ ((dcmd & (0x1 << 3)) == 0) ? "non-" : "",
+ (unsigned long long)((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 at 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_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_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->writesize = 1;
+ 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;
+ }
+
+ /* Keep a reference as the add_mtd_device worked */
+ pci_dev_get(PCI_Device);
+
+ 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++;
+ }
+
+ /* 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 %dM starting at "
+ "0x%p\n", priv->asize >> 20, priv->start);
+ iounmap(priv->start);
+ }
+ pci_dev_put(priv->dev);
+
+ 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);
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