*
* Copyright (C) 2000 Crossnet Co. <info@crossnet.co.jp>
* Copyright (C) 2004 Arcom Control Systems Ltd <linux@arcom.com>
+ * Copyright (C) 2005 MontaVista Software Inc. <source@mvista.com>
*
* 2_by_8 routines added by Simon Munton
*
* 4_by_16 work by Carolyn J. Smith
*
+ * XIP support hooks by Vitaly Wool (based on code for Intel flash
+ * by Nicolas Pitre)
+ *
* Occasionally maintained by Thayne Harbaugh tharbaugh at lnxi dot com
*
* This code is GPL
*
- * $Id: cfi_cmdset_0002.c,v 1.114 2004/12/11 15:43:53 dedekind Exp $
+ * $Id: cfi_cmdset_0002.c,v 1.122 2005/11/07 11:14:22 gleixner Exp $
*
*/
#include <linux/mtd/map.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/cfi.h>
+#include <linux/mtd/xip.h>
#define AMD_BOOTLOC_BUG
#define FORCE_WORD_WRITE 0
#define MANUFACTURER_AMD 0x0001
#define MANUFACTURER_SST 0x00BF
#define SST49LF004B 0x0060
+#define SST49LF008A 0x005a
static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
};
printk(" Silicon revision: %d\n", extp->SiliconRevision >> 1);
- printk(" Address sensitive unlock: %s\n",
+ printk(" Address sensitive unlock: %s\n",
(extp->SiliconRevision & 1) ? "Not required" : "Required");
if (extp->EraseSuspend < ARRAY_SIZE(erase_suspend))
else
printk(" Page mode: %d word page\n", extp->PageMode << 2);
- printk(" Vpp Supply Minimum Program/Erase Voltage: %d.%d V\n",
+ printk(" Vpp Supply Minimum Program/Erase Voltage: %d.%d V\n",
extp->VppMin >> 4, extp->VppMin & 0xf);
- printk(" Vpp Supply Maximum Program/Erase Voltage: %d.%d V\n",
+ printk(" Vpp Supply Maximum Program/Erase Voltage: %d.%d V\n",
extp->VppMax >> 4, extp->VppMax & 0xf);
if (extp->TopBottom < ARRAY_SIZE(top_bottom))
((cfi->cfiq->EraseRegionInfo[0] & 0xffff) == 0)) {
mtd->erase = cfi_amdstd_erase_chip;
}
-
+
}
static struct cfi_fixup cfi_fixup_table[] = {
};
static struct cfi_fixup jedec_fixup_table[] = {
{ MANUFACTURER_SST, SST49LF004B, fixup_use_fwh_lock, NULL, },
+ { MANUFACTURER_SST, SST49LF008A, fixup_use_fwh_lock, NULL, },
{ 0, 0, NULL, NULL }
};
if (cfi->cfi_mode==CFI_MODE_CFI){
unsigned char bootloc;
- /*
+ /*
* It's a real CFI chip, not one for which the probe
* routine faked a CFI structure. So we read the feature
* table from it.
return NULL;
}
+ if (extp->MajorVersion != '1' ||
+ (extp->MinorVersion < '0' || extp->MinorVersion > '4')) {
+ printk(KERN_ERR " Unknown Amd/Fujitsu Extended Query "
+ "version %c.%c.\n", extp->MajorVersion,
+ extp->MinorVersion);
+ kfree(extp);
+ kfree(mtd);
+ return NULL;
+ }
+
/* Install our own private info structure */
- cfi->cmdset_priv = extp;
+ cfi->cmdset_priv = extp;
/* Apply cfi device specific fixups */
cfi_fixup(mtd, cfi_fixup_table);
#ifdef DEBUG_CFI_FEATURES
/* Tell the user about it in lots of lovely detail */
cfi_tell_features(extp);
-#endif
+#endif
bootloc = extp->TopBottom;
if ((bootloc != 2) && (bootloc != 3)) {
if (bootloc == 3 && cfi->cfiq->NumEraseRegions > 1) {
printk(KERN_WARNING "%s: Swapping erase regions for broken CFI table.\n", map->name);
-
+
for (i=0; i<cfi->cfiq->NumEraseRegions / 2; i++) {
int j = (cfi->cfiq->NumEraseRegions-1)-i;
__u32 swap;
-
+
swap = cfi->cfiq->EraseRegionInfo[i];
cfi->cfiq->EraseRegionInfo[i] = cfi->cfiq->EraseRegionInfo[j];
cfi->cfiq->EraseRegionInfo[j] = swap;
cfi->addr_unlock2 = 0x2aa;
/* Modify the unlock address if we are in compatibility mode */
if ( /* x16 in x8 mode */
- ((cfi->device_type == CFI_DEVICETYPE_X8) &&
+ ((cfi->device_type == CFI_DEVICETYPE_X8) &&
(cfi->cfiq->InterfaceDesc == 2)) ||
/* x32 in x16 mode */
((cfi->device_type == CFI_DEVICETYPE_X16) &&
- (cfi->cfiq->InterfaceDesc == 4)))
+ (cfi->cfiq->InterfaceDesc == 4)))
{
cfi->addr_unlock1 = 0xaaa;
cfi->addr_unlock2 = 0x555;
cfi->chips[i].word_write_time = 1<<cfi->cfiq->WordWriteTimeoutTyp;
cfi->chips[i].buffer_write_time = 1<<cfi->cfiq->BufWriteTimeoutTyp;
cfi->chips[i].erase_time = 1<<cfi->cfiq->BlockEraseTimeoutTyp;
- }
-
+ }
+
map->fldrv = &cfi_amdstd_chipdrv;
-
+
return cfi_amdstd_setup(mtd);
}
unsigned long offset = 0;
int i,j;
- printk(KERN_NOTICE "number of %s chips: %d\n",
+ printk(KERN_NOTICE "number of %s chips: %d\n",
(cfi->cfi_mode == CFI_MODE_CFI)?"CFI":"JEDEC",cfi->numchips);
- /* Select the correct geometry setup */
+ /* Select the correct geometry setup */
mtd->size = devsize * cfi->numchips;
mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips;
mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info)
* mtd->numeraseregions, GFP_KERNEL);
- if (!mtd->eraseregions) {
+ if (!mtd->eraseregions) {
printk(KERN_WARNING "Failed to allocate memory for MTD erase region info\n");
goto setup_err;
}
-
+
for (i=0; i<cfi->cfiq->NumEraseRegions; i++) {
unsigned long ernum, ersize;
ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave;
ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1;
-
+
if (mtd->erasesize < ersize) {
mtd->erasesize = ersize;
}
setup_err:
if(mtd) {
- if(mtd->eraseregions)
- kfree(mtd->eraseregions);
+ kfree(mtd->eraseregions);
kfree(mtd);
}
kfree(cfi->cmdset_priv);
* correctly and is therefore not done (particulary with interleaved chips
* as each chip must be checked independantly of the others).
*/
-static int chip_ready(struct map_info *map, unsigned long addr)
+static int __xipram chip_ready(struct map_info *map, unsigned long addr)
{
map_word d, t;
return map_word_equal(map, d, t);
}
+/*
+ * Return true if the chip is ready and has the correct value.
+ *
+ * Ready is one of: read mode, query mode, erase-suspend-read mode (in any
+ * non-suspended sector) and it is indicated by no bits toggling.
+ *
+ * Error are indicated by toggling bits or bits held with the wrong value,
+ * or with bits toggling.
+ *
+ * Note that anything more complicated than checking if no bits are toggling
+ * (including checking DQ5 for an error status) is tricky to get working
+ * correctly and is therefore not done (particulary with interleaved chips
+ * as each chip must be checked independantly of the others).
+ *
+ */
+static int __xipram chip_good(struct map_info *map, unsigned long addr, map_word expected)
+{
+ map_word oldd, curd;
+
+ oldd = map_read(map, addr);
+ curd = map_read(map, addr);
+
+ return map_word_equal(map, oldd, curd) &&
+ map_word_equal(map, curd, expected);
+}
+
static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode)
{
DECLARE_WAITQUEUE(wait, current);
if (time_after(jiffies, timeo)) {
printk(KERN_ERR "Waiting for chip to be ready timed out.\n");
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
return -EIO;
}
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
cfi_udelay(1);
- cfi_spin_lock(chip->mutex);
+ spin_lock(chip->mutex);
/* Someone else might have been playing with it. */
goto retry;
}
-
+
case FL_READY:
case FL_CFI_QUERY:
case FL_JEDEC_QUERY:
printk(KERN_ERR "MTD %s(): chip not ready after erase suspend\n", __func__);
return -EIO;
}
-
- cfi_spin_unlock(chip->mutex);
+
+ spin_unlock(chip->mutex);
cfi_udelay(1);
- cfi_spin_lock(chip->mutex);
+ spin_lock(chip->mutex);
/* Nobody will touch it while it's in state FL_ERASE_SUSPENDING.
So we can just loop here. */
}
chip->state = FL_READY;
return 0;
+ case FL_XIP_WHILE_ERASING:
+ if (mode != FL_READY && mode != FL_POINT &&
+ (!cfip || !(cfip->EraseSuspend&2)))
+ goto sleep;
+ chip->oldstate = chip->state;
+ chip->state = FL_READY;
+ return 0;
+
case FL_POINT:
/* Only if there's no operation suspended... */
if (mode == FL_READY && chip->oldstate == FL_READY)
sleep:
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&chip->wq, &wait);
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
schedule();
remove_wait_queue(&chip->wq, &wait);
- cfi_spin_lock(chip->mutex);
+ spin_lock(chip->mutex);
goto resettime;
}
}
chip->state = FL_ERASING;
break;
+ case FL_XIP_WHILE_ERASING:
+ chip->state = chip->oldstate;
+ chip->oldstate = FL_READY;
+ break;
+
case FL_READY:
case FL_STATUS:
/* We should really make set_vpp() count, rather than doing this */
wake_up(&chip->wq);
}
+#ifdef CONFIG_MTD_XIP
+
+/*
+ * No interrupt what so ever can be serviced while the flash isn't in array
+ * mode. This is ensured by the xip_disable() and xip_enable() functions
+ * enclosing any code path where the flash is known not to be in array mode.
+ * And within a XIP disabled code path, only functions marked with __xipram
+ * may be called and nothing else (it's a good thing to inspect generated
+ * assembly to make sure inline functions were actually inlined and that gcc
+ * didn't emit calls to its own support functions). Also configuring MTD CFI
+ * support to a single buswidth and a single interleave is also recommended.
+ */
+
+static void xip_disable(struct map_info *map, struct flchip *chip,
+ unsigned long adr)
+{
+ /* TODO: chips with no XIP use should ignore and return */
+ (void) map_read(map, adr); /* ensure mmu mapping is up to date */
+ local_irq_disable();
+}
+
+static void __xipram xip_enable(struct map_info *map, struct flchip *chip,
+ unsigned long adr)
+{
+ struct cfi_private *cfi = map->fldrv_priv;
+
+ if (chip->state != FL_POINT && chip->state != FL_READY) {
+ map_write(map, CMD(0xf0), adr);
+ chip->state = FL_READY;
+ }
+ (void) map_read(map, adr);
+ xip_iprefetch();
+ local_irq_enable();
+}
+
+/*
+ * When a delay is required for the flash operation to complete, the
+ * xip_udelay() function is polling for both the given timeout and pending
+ * (but still masked) hardware interrupts. Whenever there is an interrupt
+ * pending then the flash erase operation is suspended, array mode restored
+ * and interrupts unmasked. Task scheduling might also happen at that
+ * point. The CPU eventually returns from the interrupt or the call to
+ * schedule() and the suspended flash operation is resumed for the remaining
+ * of the delay period.
+ *
+ * Warning: this function _will_ fool interrupt latency tracing tools.
+ */
+
+static void __xipram xip_udelay(struct map_info *map, struct flchip *chip,
+ unsigned long adr, int usec)
+{
+ struct cfi_private *cfi = map->fldrv_priv;
+ struct cfi_pri_amdstd *extp = cfi->cmdset_priv;
+ map_word status, OK = CMD(0x80);
+ unsigned long suspended, start = xip_currtime();
+ flstate_t oldstate;
+
+ do {
+ cpu_relax();
+ if (xip_irqpending() && extp &&
+ ((chip->state == FL_ERASING && (extp->EraseSuspend & 2))) &&
+ (cfi_interleave_is_1(cfi) || chip->oldstate == FL_READY)) {
+ /*
+ * Let's suspend the erase operation when supported.
+ * Note that we currently don't try to suspend
+ * interleaved chips if there is already another
+ * operation suspended (imagine what happens
+ * when one chip was already done with the current
+ * operation while another chip suspended it, then
+ * we resume the whole thing at once). Yes, it
+ * can happen!
+ */
+ map_write(map, CMD(0xb0), adr);
+ usec -= xip_elapsed_since(start);
+ suspended = xip_currtime();
+ do {
+ if (xip_elapsed_since(suspended) > 100000) {
+ /*
+ * The chip doesn't want to suspend
+ * after waiting for 100 msecs.
+ * This is a critical error but there
+ * is not much we can do here.
+ */
+ return;
+ }
+ status = map_read(map, adr);
+ } while (!map_word_andequal(map, status, OK, OK));
+
+ /* Suspend succeeded */
+ oldstate = chip->state;
+ if (!map_word_bitsset(map, status, CMD(0x40)))
+ break;
+ chip->state = FL_XIP_WHILE_ERASING;
+ chip->erase_suspended = 1;
+ map_write(map, CMD(0xf0), adr);
+ (void) map_read(map, adr);
+ asm volatile (".rep 8; nop; .endr");
+ local_irq_enable();
+ spin_unlock(chip->mutex);
+ asm volatile (".rep 8; nop; .endr");
+ cond_resched();
+
+ /*
+ * We're back. However someone else might have
+ * decided to go write to the chip if we are in
+ * a suspended erase state. If so let's wait
+ * until it's done.
+ */
+ spin_lock(chip->mutex);
+ while (chip->state != FL_XIP_WHILE_ERASING) {
+ DECLARE_WAITQUEUE(wait, current);
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ add_wait_queue(&chip->wq, &wait);
+ spin_unlock(chip->mutex);
+ schedule();
+ remove_wait_queue(&chip->wq, &wait);
+ spin_lock(chip->mutex);
+ }
+ /* Disallow XIP again */
+ local_irq_disable();
+
+ /* Resume the write or erase operation */
+ map_write(map, CMD(0x30), adr);
+ chip->state = oldstate;
+ start = xip_currtime();
+ } else if (usec >= 1000000/HZ) {
+ /*
+ * Try to save on CPU power when waiting delay
+ * is at least a system timer tick period.
+ * No need to be extremely accurate here.
+ */
+ xip_cpu_idle();
+ }
+ status = map_read(map, adr);
+ } while (!map_word_andequal(map, status, OK, OK)
+ && xip_elapsed_since(start) < usec);
+}
+
+#define UDELAY(map, chip, adr, usec) xip_udelay(map, chip, adr, usec)
+
+/*
+ * The INVALIDATE_CACHED_RANGE() macro is normally used in parallel while
+ * the flash is actively programming or erasing since we have to poll for
+ * the operation to complete anyway. We can't do that in a generic way with
+ * a XIP setup so do it before the actual flash operation in this case
+ * and stub it out from INVALIDATE_CACHE_UDELAY.
+ */
+#define XIP_INVAL_CACHED_RANGE(map, from, size) \
+ INVALIDATE_CACHED_RANGE(map, from, size)
+
+#define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \
+ UDELAY(map, chip, adr, usec)
+
+/*
+ * Extra notes:
+ *
+ * Activating this XIP support changes the way the code works a bit. For
+ * example the code to suspend the current process when concurrent access
+ * happens is never executed because xip_udelay() will always return with the
+ * same chip state as it was entered with. This is why there is no care for
+ * the presence of add_wait_queue() or schedule() calls from within a couple
+ * xip_disable()'d areas of code, like in do_erase_oneblock for example.
+ * The queueing and scheduling are always happening within xip_udelay().
+ *
+ * Similarly, get_chip() and put_chip() just happen to always be executed
+ * with chip->state set to FL_READY (or FL_XIP_WHILE_*) where flash state
+ * is in array mode, therefore never executing many cases therein and not
+ * causing any problem with XIP.
+ */
+
+#else
+
+#define xip_disable(map, chip, adr)
+#define xip_enable(map, chip, adr)
+#define XIP_INVAL_CACHED_RANGE(x...)
+
+#define UDELAY(map, chip, adr, usec) \
+do { \
+ spin_unlock(chip->mutex); \
+ cfi_udelay(usec); \
+ spin_lock(chip->mutex); \
+} while (0)
+
+#define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \
+do { \
+ spin_unlock(chip->mutex); \
+ INVALIDATE_CACHED_RANGE(map, adr, len); \
+ cfi_udelay(usec); \
+ spin_lock(chip->mutex); \
+} while (0)
+
+#endif
static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf)
{
adr += chip->start;
- /* Ensure cmd read/writes are aligned. */
- cmd_addr = adr & ~(map_bankwidth(map)-1);
+ /* Ensure cmd read/writes are aligned. */
+ cmd_addr = adr & ~(map_bankwidth(map)-1);
- cfi_spin_lock(chip->mutex);
+ spin_lock(chip->mutex);
ret = get_chip(map, chip, cmd_addr, FL_READY);
if (ret) {
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
return ret;
}
put_chip(map, chip, cmd_addr);
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
return 0;
}
struct cfi_private *cfi = map->fldrv_priv;
retry:
- cfi_spin_lock(chip->mutex);
+ spin_lock(chip->mutex);
if (chip->state != FL_READY){
#if 0
#endif
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&chip->wq, &wait);
-
- cfi_spin_unlock(chip->mutex);
+
+ spin_unlock(chip->mutex);
schedule();
remove_wait_queue(&chip->wq, &wait);
timeo = jiffies + HZ;
goto retry;
- }
+ }
adr += chip->start;
cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
cfi_send_gen_cmd(0x88, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
-
+
map_copy_from(map, buf, adr, len);
cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
cfi_send_gen_cmd(0x90, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
cfi_send_gen_cmd(0x00, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
-
+
wake_up(&chip->wq);
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
return 0;
}
}
-static int do_write_oneword(struct map_info *map, struct flchip *chip, unsigned long adr, map_word datum)
+static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, unsigned long adr, map_word datum)
{
struct cfi_private *cfi = map->fldrv_priv;
unsigned long timeo = jiffies + HZ;
adr += chip->start;
- cfi_spin_lock(chip->mutex);
+ spin_lock(chip->mutex);
ret = get_chip(map, chip, adr, FL_WRITING);
if (ret) {
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
return ret;
}
goto op_done;
}
+ XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map));
ENABLE_VPP(map);
+ xip_disable(map, chip, adr);
retry:
cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
map_write(map, datum, adr);
chip->state = FL_WRITING;
- cfi_spin_unlock(chip->mutex);
- cfi_udelay(chip->word_write_time);
- cfi_spin_lock(chip->mutex);
+ INVALIDATE_CACHE_UDELAY(map, chip,
+ adr, map_bankwidth(map),
+ chip->word_write_time);
/* See comment above for timeout value. */
- timeo = jiffies + uWriteTimeout;
+ timeo = jiffies + uWriteTimeout;
for (;;) {
if (chip->state != FL_WRITING) {
/* Someone's suspended the write. Sleep */
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&chip->wq, &wait);
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
schedule();
remove_wait_queue(&chip->wq, &wait);
timeo = jiffies + (HZ / 2); /* FIXME */
- cfi_spin_lock(chip->mutex);
+ spin_lock(chip->mutex);
continue;
}
- if (chip_ready(map, adr))
- goto op_done;
+ if (time_after(jiffies, timeo) && !chip_ready(map, adr)){
+ xip_enable(map, chip, adr);
+ printk(KERN_WARNING "MTD %s(): software timeout\n", __func__);
+ xip_disable(map, chip, adr);
+ break;
+ }
- if (time_after(jiffies, timeo))
- break;
+ if (chip_ready(map, adr))
+ break;
/* Latency issues. Drop the lock, wait a while and retry */
- cfi_spin_unlock(chip->mutex);
- cfi_udelay(1);
- cfi_spin_lock(chip->mutex);
+ UDELAY(map, chip, adr, 1);
}
+ /* Did we succeed? */
+ if (!chip_good(map, adr, datum)) {
+ /* reset on all failures. */
+ map_write( map, CMD(0xF0), chip->start );
+ /* FIXME - should have reset delay before continuing */
- printk(KERN_WARNING "MTD %s(): software timeout\n", __func__);
-
- /* reset on all failures. */
- map_write( map, CMD(0xF0), chip->start );
- /* FIXME - should have reset delay before continuing */
- if (++retry_cnt <= MAX_WORD_RETRIES)
- goto retry;
+ if (++retry_cnt <= MAX_WORD_RETRIES)
+ goto retry;
- ret = -EIO;
+ ret = -EIO;
+ }
+ xip_enable(map, chip, adr);
op_done:
chip->state = FL_READY;
put_chip(map, chip, adr);
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
return ret;
}
map_word tmp_buf;
retry:
- cfi_spin_lock(cfi->chips[chipnum].mutex);
+ spin_lock(cfi->chips[chipnum].mutex);
if (cfi->chips[chipnum].state != FL_READY) {
#if 0
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&cfi->chips[chipnum].wq, &wait);
- cfi_spin_unlock(cfi->chips[chipnum].mutex);
+ spin_unlock(cfi->chips[chipnum].mutex);
schedule();
remove_wait_queue(&cfi->chips[chipnum].wq, &wait);
/* Load 'tmp_buf' with old contents of flash */
tmp_buf = map_read(map, bus_ofs+chipstart);
- cfi_spin_unlock(cfi->chips[chipnum].mutex);
+ spin_unlock(cfi->chips[chipnum].mutex);
/* Number of bytes to copy from buffer */
n = min_t(int, len, map_bankwidth(map)-i);
-
+
tmp_buf = map_word_load_partial(map, tmp_buf, buf, i, n);
- ret = do_write_oneword(map, &cfi->chips[chipnum],
+ ret = do_write_oneword(map, &cfi->chips[chipnum],
bus_ofs, tmp_buf);
- if (ret)
+ if (ret)
return ret;
-
+
ofs += n;
buf += n;
(*retlen) += n;
len -= n;
if (ofs >> cfi->chipshift) {
- chipnum ++;
+ chipnum ++;
ofs = 0;
if (chipnum == cfi->numchips)
return 0;
}
}
-
+
/* We are now aligned, write as much as possible */
while(len >= map_bankwidth(map)) {
map_word datum;
len -= map_bankwidth(map);
if (ofs >> cfi->chipshift) {
- chipnum ++;
+ chipnum ++;
ofs = 0;
if (chipnum == cfi->numchips)
return 0;
map_word tmp_buf;
retry1:
- cfi_spin_lock(cfi->chips[chipnum].mutex);
+ spin_lock(cfi->chips[chipnum].mutex);
if (cfi->chips[chipnum].state != FL_READY) {
#if 0
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&cfi->chips[chipnum].wq, &wait);
- cfi_spin_unlock(cfi->chips[chipnum].mutex);
+ spin_unlock(cfi->chips[chipnum].mutex);
schedule();
remove_wait_queue(&cfi->chips[chipnum].wq, &wait);
tmp_buf = map_read(map, ofs + chipstart);
- cfi_spin_unlock(cfi->chips[chipnum].mutex);
+ spin_unlock(cfi->chips[chipnum].mutex);
tmp_buf = map_word_load_partial(map, tmp_buf, buf, 0, len);
-
- ret = do_write_oneword(map, &cfi->chips[chipnum],
+
+ ret = do_write_oneword(map, &cfi->chips[chipnum],
ofs, tmp_buf);
- if (ret)
+ if (ret)
return ret;
-
+
(*retlen) += len;
}
/*
* FIXME: interleaved mode not tested, and probably not supported!
*/
-static inline int do_write_buffer(struct map_info *map, struct flchip *chip,
- unsigned long adr, const u_char *buf, int len)
+static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
+ unsigned long adr, const u_char *buf,
+ int len)
{
struct cfi_private *cfi = map->fldrv_priv;
unsigned long timeo = jiffies + HZ;
adr += chip->start;
cmd_adr = adr;
- cfi_spin_lock(chip->mutex);
+ spin_lock(chip->mutex);
ret = get_chip(map, chip, adr, FL_WRITING);
if (ret) {
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
return ret;
}
DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n",
__func__, adr, datum.x[0] );
+ XIP_INVAL_CACHED_RANGE(map, adr, len);
ENABLE_VPP(map);
+ xip_disable(map, chip, cmd_adr);
+
cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
//cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
map_write(map, CMD(0x29), cmd_adr);
chip->state = FL_WRITING;
- cfi_spin_unlock(chip->mutex);
- cfi_udelay(chip->buffer_write_time);
- cfi_spin_lock(chip->mutex);
+ INVALIDATE_CACHE_UDELAY(map, chip,
+ adr, map_bankwidth(map),
+ chip->word_write_time);
+
+ timeo = jiffies + uWriteTimeout;
- timeo = jiffies + uWriteTimeout;
-
for (;;) {
if (chip->state != FL_WRITING) {
/* Someone's suspended the write. Sleep */
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&chip->wq, &wait);
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
schedule();
remove_wait_queue(&chip->wq, &wait);
timeo = jiffies + (HZ / 2); /* FIXME */
- cfi_spin_lock(chip->mutex);
+ spin_lock(chip->mutex);
continue;
}
- if (chip_ready(map, adr))
- goto op_done;
-
- if( time_after(jiffies, timeo))
+ if (time_after(jiffies, timeo) && !chip_ready(map, adr))
break;
+ if (chip_ready(map, adr)) {
+ xip_enable(map, chip, adr);
+ goto op_done;
+ }
+
/* Latency issues. Drop the lock, wait a while and retry */
- cfi_spin_unlock(chip->mutex);
- cfi_udelay(1);
- cfi_spin_lock(chip->mutex);
+ UDELAY(map, chip, adr, 1);
}
- printk(KERN_WARNING "MTD %s(): software timeout\n",
- __func__ );
-
/* reset on all failures. */
map_write( map, CMD(0xF0), chip->start );
+ xip_enable(map, chip, adr);
/* FIXME - should have reset delay before continuing */
+ printk(KERN_WARNING "MTD %s(): software timeout\n",
+ __func__ );
+
ret = -EIO;
op_done:
chip->state = FL_READY;
put_chip(map, chip, adr);
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
return ret;
}
if (size % map_bankwidth(map))
size -= size % map_bankwidth(map);
- ret = do_write_buffer(map, &cfi->chips[chipnum],
+ ret = do_write_buffer(map, &cfi->chips[chipnum],
ofs, buf, size);
if (ret)
return ret;
len -= size;
if (ofs >> cfi->chipshift) {
- chipnum ++;
+ chipnum ++;
ofs = 0;
if (chipnum == cfi->numchips)
return 0;
* Handle devices with one erase region, that only implement
* the chip erase command.
*/
-static inline int do_erase_chip(struct map_info *map, struct flchip *chip)
+static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip)
{
struct cfi_private *cfi = map->fldrv_priv;
unsigned long timeo = jiffies + HZ;
adr = cfi->addr_unlock1;
- cfi_spin_lock(chip->mutex);
+ spin_lock(chip->mutex);
ret = get_chip(map, chip, adr, FL_WRITING);
if (ret) {
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
return ret;
}
DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): ERASE 0x%.8lx\n",
__func__, chip->start );
+ XIP_INVAL_CACHED_RANGE(map, adr, map->size);
ENABLE_VPP(map);
+ xip_disable(map, chip, adr);
+
cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
chip->erase_suspended = 0;
chip->in_progress_block_addr = adr;
- cfi_spin_unlock(chip->mutex);
- msleep(chip->erase_time/2);
- cfi_spin_lock(chip->mutex);
+ INVALIDATE_CACHE_UDELAY(map, chip,
+ adr, map->size,
+ chip->erase_time*500);
timeo = jiffies + (HZ*20);
/* Someone's suspended the erase. Sleep */
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&chip->wq, &wait);
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
schedule();
remove_wait_queue(&chip->wq, &wait);
- cfi_spin_lock(chip->mutex);
+ spin_lock(chip->mutex);
continue;
}
if (chip->erase_suspended) {
}
if (chip_ready(map, adr))
- goto op_done;
+ break;
- if (time_after(jiffies, timeo))
+ if (time_after(jiffies, timeo)) {
+ printk(KERN_WARNING "MTD %s(): software timeout\n",
+ __func__ );
break;
+ }
/* Latency issues. Drop the lock, wait a while and retry */
- cfi_spin_unlock(chip->mutex);
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(1);
- cfi_spin_lock(chip->mutex);
+ UDELAY(map, chip, adr, 1000000/HZ);
}
+ /* Did we succeed? */
+ if (!chip_good(map, adr, map_word_ff(map))) {
+ /* reset on all failures. */
+ map_write( map, CMD(0xF0), chip->start );
+ /* FIXME - should have reset delay before continuing */
- printk(KERN_WARNING "MTD %s(): software timeout\n",
- __func__ );
-
- /* reset on all failures. */
- map_write( map, CMD(0xF0), chip->start );
- /* FIXME - should have reset delay before continuing */
+ ret = -EIO;
+ }
- ret = -EIO;
- op_done:
chip->state = FL_READY;
+ xip_enable(map, chip, adr);
put_chip(map, chip, adr);
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
return ret;
}
-static inline int do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr, int len, void *thunk)
+static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr, int len, void *thunk)
{
struct cfi_private *cfi = map->fldrv_priv;
unsigned long timeo = jiffies + HZ;
adr += chip->start;
- cfi_spin_lock(chip->mutex);
+ spin_lock(chip->mutex);
ret = get_chip(map, chip, adr, FL_ERASING);
if (ret) {
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
return ret;
}
DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): ERASE 0x%.8lx\n",
__func__, adr );
+ XIP_INVAL_CACHED_RANGE(map, adr, len);
ENABLE_VPP(map);
+ xip_disable(map, chip, adr);
+
cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
chip->state = FL_ERASING;
chip->erase_suspended = 0;
chip->in_progress_block_addr = adr;
-
- cfi_spin_unlock(chip->mutex);
- msleep(chip->erase_time/2);
- cfi_spin_lock(chip->mutex);
+
+ INVALIDATE_CACHE_UDELAY(map, chip,
+ adr, len,
+ chip->erase_time*500);
timeo = jiffies + (HZ*20);
/* Someone's suspended the erase. Sleep */
set_current_state(TASK_UNINTERRUPTIBLE);
add_wait_queue(&chip->wq, &wait);
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
schedule();
remove_wait_queue(&chip->wq, &wait);
- cfi_spin_lock(chip->mutex);
+ spin_lock(chip->mutex);
continue;
}
if (chip->erase_suspended) {
chip->erase_suspended = 0;
}
- if (chip_ready(map, adr))
- goto op_done;
+ if (chip_ready(map, adr)) {
+ xip_enable(map, chip, adr);
+ break;
+ }
- if (time_after(jiffies, timeo))
+ if (time_after(jiffies, timeo)) {
+ xip_enable(map, chip, adr);
+ printk(KERN_WARNING "MTD %s(): software timeout\n",
+ __func__ );
break;
+ }
/* Latency issues. Drop the lock, wait a while and retry */
- cfi_spin_unlock(chip->mutex);
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(1);
- cfi_spin_lock(chip->mutex);
+ UDELAY(map, chip, adr, 1000000/HZ);
+ }
+ /* Did we succeed? */
+ if (!chip_good(map, adr, map_word_ff(map))) {
+ /* reset on all failures. */
+ map_write( map, CMD(0xF0), chip->start );
+ /* FIXME - should have reset delay before continuing */
+
+ ret = -EIO;
}
-
- printk(KERN_WARNING "MTD %s(): software timeout\n",
- __func__ );
-
- /* reset on all failures. */
- map_write( map, CMD(0xF0), chip->start );
- /* FIXME - should have reset delay before continuing */
- ret = -EIO;
- op_done:
chip->state = FL_READY;
put_chip(map, chip, adr);
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
return ret;
}
instr->state = MTD_ERASE_DONE;
mtd_erase_callback(instr);
-
+
return 0;
}
instr->state = MTD_ERASE_DONE;
mtd_erase_callback(instr);
-
+
return 0;
}
chip = &cfi->chips[i];
retry:
- cfi_spin_lock(chip->mutex);
+ spin_lock(chip->mutex);
switch(chip->state) {
case FL_READY:
case FL_JEDEC_QUERY:
chip->oldstate = chip->state;
chip->state = FL_SYNCING;
- /* No need to wake_up() on this state change -
+ /* No need to wake_up() on this state change -
* as the whole point is that nobody can do anything
* with the chip now anyway.
*/
case FL_SYNCING:
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
break;
default:
/* Not an idle state */
add_wait_queue(&chip->wq, &wait);
-
- cfi_spin_unlock(chip->mutex);
+
+ spin_unlock(chip->mutex);
schedule();
remove_wait_queue(&chip->wq, &wait);
-
+
goto retry;
}
}
for (i--; i >=0; i--) {
chip = &cfi->chips[i];
- cfi_spin_lock(chip->mutex);
-
+ spin_lock(chip->mutex);
+
if (chip->state == FL_SYNCING) {
chip->state = chip->oldstate;
wake_up(&chip->wq);
}
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
}
}
for (i=0; !ret && i<cfi->numchips; i++) {
chip = &cfi->chips[i];
- cfi_spin_lock(chip->mutex);
+ spin_lock(chip->mutex);
switch(chip->state) {
case FL_READY:
case FL_JEDEC_QUERY:
chip->oldstate = chip->state;
chip->state = FL_PM_SUSPENDED;
- /* No need to wake_up() on this state change -
+ /* No need to wake_up() on this state change -
* as the whole point is that nobody can do anything
* with the chip now anyway.
*/
ret = -EAGAIN;
break;
}
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
}
/* Unlock the chips again */
for (i--; i >=0; i--) {
chip = &cfi->chips[i];
- cfi_spin_lock(chip->mutex);
-
+ spin_lock(chip->mutex);
+
if (chip->state == FL_PM_SUSPENDED) {
chip->state = chip->oldstate;
wake_up(&chip->wq);
}
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
}
}
-
+
return ret;
}
struct flchip *chip;
for (i=0; i<cfi->numchips; i++) {
-
+
chip = &cfi->chips[i];
- cfi_spin_lock(chip->mutex);
-
+ spin_lock(chip->mutex);
+
if (chip->state == FL_PM_SUSPENDED) {
chip->state = FL_READY;
map_write(map, CMD(0xF0), chip->start);
else
printk(KERN_ERR "Argh. Chip not in PM_SUSPENDED state upon resume()\n");
- cfi_spin_unlock(chip->mutex);
+ spin_unlock(chip->mutex);
}
}
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
+
kfree(cfi->cmdset_priv);
kfree(cfi->cfiq);
kfree(cfi);
git://git.onelab.eu / linux-2.6.git / blobdiff