kernel-ark/drivers/mtd/devices/pmc551.c
Tim Schmielau cd354f1ae7 [PATCH] remove many unneeded #includes of sched.h
After Al Viro (finally) succeeded in removing the sched.h #include in module.h
recently, it makes sense again to remove other superfluous sched.h includes.
There are quite a lot of files which include it but don't actually need
anything defined in there.  Presumably these includes were once needed for
macros that used to live in sched.h, but moved to other header files in the
course of cleaning it up.

To ease the pain, this time I did not fiddle with any header files and only
removed #includes from .c-files, which tend to cause less trouble.

Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
configs in arch/arm/configs on arm.  I also checked that no new warnings were
introduced by the patch (actually, some warnings are removed that were emitted
by unnecessarily included header files).

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-14 08:09:54 -08:00

870 lines
25 KiB
C

/*
* $Id: pmc551.c,v 1.32 2005/11/07 11:14:25 gleixner Exp $
*
* PMC551 PCI Mezzanine Ram Device
*
* Author:
* Mark Ferrell <mferrell@mvista.com>
* Copyright 1999,2000 Nortel Networks
*
* License:
* As part of this driver was derived from the slram.c driver it
* falls under the same license, which is GNU General Public
* License v2
*
* Description:
* This driver is intended to support the PMC551 PCI Ram device
* from Ramix Inc. The PMC551 is a PMC Mezzanine module for
* cPCI embedded systems. The device contains a single SROM
* that initially programs the V370PDC chipset onboard the
* device, and various banks of DRAM/SDRAM onboard. This driver
* implements this PCI Ram device as an MTD (Memory Technology
* Device) so that it can be used to hold a file system, or for
* added swap space in embedded systems. Since the memory on
* this board isn't as fast as main memory we do not try to hook
* it into main memory as that would simply reduce performance
* on the system. Using it as a block device allows us to use
* it as high speed swap or for a high speed disk device of some
* sort. Which becomes very useful on diskless systems in the
* embedded market I might add.
*
* Notes:
* Due to what I assume is more buggy SROM, the 64M PMC551 I
* have available claims that all 4 of it's DRAM banks have 64M
* of ram configured (making a grand total of 256M onboard).
* This is slightly annoying since the BAR0 size reflects the
* aperture size, not the dram size, and the V370PDC supplies no
* other method for memory size discovery. This problem is
* mostly only relevant when compiled as a module, as the
* unloading of the module with an aperture size smaller then
* the ram will cause the driver to detect the onboard memory
* size to be equal to the aperture size when the module is
* reloaded. Soooo, to help, the module supports an msize
* option to allow the specification of the onboard memory, and
* an asize option, to allow the specification of the aperture
* size. The aperture must be equal to or less then the memory
* size, the driver will correct this if you screw it up. This
* problem is not relevant for compiled in drivers as compiled
* in drivers only init once.
*
* Credits:
* Saeed Karamooz <saeed@ramix.com> of Ramix INC. for the
* initial example code of how to initialize this device and for
* help with questions I had concerning operation of the device.
*
* Most of the MTD code for this driver was originally written
* for the slram.o module in the MTD drivers package which
* allows the mapping of system memory into an MTD device.
* Since the PMC551 memory module is accessed in the same
* fashion as system memory, the slram.c code became a very nice
* fit to the needs of this driver. All we added was PCI
* detection/initialization to the driver and automatically figure
* out the size via the PCI detection.o, later changes by Corey
* Minyard set up the card to utilize a 1M sliding apature.
*
* Corey Minyard <minyard@nortelnetworks.com>
* * Modified driver to utilize a sliding aperture instead of
* mapping all memory into kernel space which turned out to
* be very wasteful.
* * Located a bug in the SROM's initialization sequence that
* made the memory unusable, added a fix to code to touch up
* the DRAM some.
*
* Bugs/FIXME's:
* * MUST fix the init function to not spin on a register
* waiting for it to set .. this does not safely handle busted
* devices that never reset the register correctly which will
* cause the system to hang w/ a reboot being the only chance at
* recover. [sort of fixed, could be better]
* * Add I2C handling of the SROM so we can read the SROM's information
* about the aperture size. This should always accurately reflect the
* onboard memory size.
* * Comb the init routine. It's still a bit cludgy on a few things.
*/
#include <linux/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>
#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)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;
#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_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 (add_mtd_device(mtd)) {
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 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);
pci_iounmap(priv->dev, 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);