-diff -urN linux-2.4.30/drivers/mtd/chips/Config.in linux-2.4.30.dev/drivers/mtd/chips/Config.in
---- linux-2.4.30/drivers/mtd/chips/Config.in 2003-06-13 16:51:34.000000000 +0200
-+++ linux-2.4.30.dev/drivers/mtd/chips/Config.in 2005-08-22 01:34:46.435134440 +0200
-@@ -45,6 +45,7 @@
- dep_tristate ' Support for Intel/Sharp flash chips' CONFIG_MTD_CFI_INTELEXT $CONFIG_MTD_GEN_PROBE
- dep_tristate ' Support for AMD/Fujitsu flash chips' CONFIG_MTD_CFI_AMDSTD $CONFIG_MTD_GEN_PROBE
- dep_tristate ' Support for ST (Advanced Architecture) flash chips' CONFIG_MTD_CFI_STAA $CONFIG_MTD_GEN_PROBE
-+dep_tristate ' Support for SST flash chips' CONFIG_MTD_CFI_SSTSTD $CONFIG_MTD_GEN_PROBE
-
- dep_tristate ' Support for RAM chips in bus mapping' CONFIG_MTD_RAM $CONFIG_MTD
- dep_tristate ' Support for ROM chips in bus mapping' CONFIG_MTD_ROM $CONFIG_MTD
-diff -urN linux-2.4.30/drivers/mtd/chips/Makefile linux-2.4.30.dev/drivers/mtd/chips/Makefile
---- linux-2.4.30/drivers/mtd/chips/Makefile 2003-06-13 16:51:34.000000000 +0200
-+++ linux-2.4.30.dev/drivers/mtd/chips/Makefile 2005-08-22 01:34:46.458130944 +0200
-@@ -18,6 +18,7 @@
- obj-$(CONFIG_MTD_AMDSTD) += amd_flash.o
- obj-$(CONFIG_MTD_CFI) += cfi_probe.o
- obj-$(CONFIG_MTD_CFI_STAA) += cfi_cmdset_0020.o
-+obj-$(CONFIG_MTD_CFI_SSTSTD) += cfi_cmdset_0701.o
- obj-$(CONFIG_MTD_CFI_AMDSTD) += cfi_cmdset_0002.o
- obj-$(CONFIG_MTD_CFI_INTELEXT) += cfi_cmdset_0001.o
- obj-$(CONFIG_MTD_GEN_PROBE) += gen_probe.o
-diff -urN linux-2.4.30/drivers/mtd/chips/cfi_cmdset_0701.c linux-2.4.30.dev/drivers/mtd/chips/cfi_cmdset_0701.c
---- linux-2.4.30/drivers/mtd/chips/cfi_cmdset_0701.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.4.30.dev/drivers/mtd/chips/cfi_cmdset_0701.c 2005-08-22 01:34:46.433134744 +0200
-@@ -0,0 +1,855 @@
-+/*
-+ * Common Flash Interface support:
-+ * SST Standard Vendor Command Set (ID 0x0701)
-+ *
-+ * Copyright (C) 2000 Crossnet Co. <info@crossnet.co.jp>
-+ *
-+ * 2_by_8 routines added by Simon Munton
-+ *
-+ * This code is GPL
-+ *
-+ * $Id: cfi_cmdset_0701.c,v 1.1 2005/03/16 13:50:00 wbx Exp $
-+ *
-+ */
-+
-+#include <linux/module.h>
-+#include <linux/types.h>
-+#include <linux/kernel.h>
-+#include <linux/sched.h>
-+#include <asm/io.h>
-+#include <asm/byteorder.h>
-+
-+#include <linux/errno.h>
-+#include <linux/slab.h>
-+#include <linux/delay.h>
-+#include <linux/interrupt.h>
-+#include <linux/mtd/map.h>
-+#include <linux/mtd/cfi.h>
-+
-+static int cfi_sststd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
-+static int cfi_sststd_write(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
-+static int cfi_sststd_erase_onesize(struct mtd_info *, struct erase_info *);
-+static int cfi_sststd_erase_varsize(struct mtd_info *, struct erase_info *);
-+static void cfi_sststd_sync (struct mtd_info *);
-+static int cfi_sststd_suspend (struct mtd_info *);
-+static void cfi_sststd_resume (struct mtd_info *);
-+
-+static void cfi_sststd_destroy(struct mtd_info *);
-+
-+struct mtd_info *cfi_cmdset_0701(struct map_info *, int);
-+static struct mtd_info *cfi_sststd_setup (struct map_info *);
-+
-+
-+static struct mtd_chip_driver cfi_sststd_chipdrv = {
-+ probe: NULL, /* Not usable directly */
-+ destroy: cfi_sststd_destroy,
-+ name: "cfi_cmdset_0701",
-+ module: THIS_MODULE
-+};
-+
-+struct mtd_info *cfi_cmdset_0701(struct map_info *map, int primary)
-+{
-+ struct cfi_private *cfi = map->fldrv_priv;
-+ int ofs_factor = cfi->interleave * cfi->device_type;
-+ int i;
-+ __u8 major, minor;
-+ __u32 base = cfi->chips[0].start;
-+
-+ if (cfi->cfi_mode==1){
-+ __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR;
-+
-+ cfi_send_gen_cmd(0xAA, 0x5555, base, map, cfi, cfi->device_type, NULL);
-+ cfi_send_gen_cmd(0x55, 0x2AAA, base, map, cfi, cfi->device_type, NULL);
-+ cfi_send_gen_cmd(0x98, 0x5555, base, map, cfi, cfi->device_type, NULL);
-+
-+ major = cfi_read_query(map, base + (adr+3)*ofs_factor);
-+ minor = cfi_read_query(map, base + (adr+4)*ofs_factor);
-+
-+ printk(" SST Query Table v%c.%c at 0x%4.4X\n",
-+ major, minor, adr);
-+ cfi_send_gen_cmd(0xf0, 0x5555, base, map, cfi, cfi->device_type, NULL);
-+
-+ cfi_send_gen_cmd(0xAA, 0x5555, base, map, cfi, cfi->device_type, NULL);
-+ cfi_send_gen_cmd(0x55, 0x2AAA, base, map, cfi, cfi->device_type, NULL);
-+ cfi_send_gen_cmd(0x90, 0x5555, base, map, cfi, cfi->device_type, NULL);
-+ cfi->mfr = cfi_read_query(map, base);
-+ cfi->id = cfi_read_query(map, base + ofs_factor);
-+
-+ cfi_send_gen_cmd(0xAA, 0x5555, base, map, cfi, cfi->device_type, NULL);
-+ cfi_send_gen_cmd(0x55, 0x2AAA, base, map, cfi, cfi->device_type, NULL);
-+ cfi_send_gen_cmd(0x98, 0x5555, base, map, cfi, cfi->device_type, NULL);
-+
-+ switch (cfi->device_type) {
-+ case CFI_DEVICETYPE_X16:
-+ cfi->addr_unlock1 = 0x5555;
-+ cfi->addr_unlock2 = 0x2AAA;
-+ break;
-+ default:
-+ printk(KERN_NOTICE "Eep. Unknown cfi_cmdset_0701 device type %d\n", cfi->device_type);
-+ return NULL;
-+ }
-+ } /* CFI mode */
-+
-+ for (i=0; i< cfi->numchips; i++) {
-+ 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_sststd_chipdrv;
-+ MOD_INC_USE_COUNT;
-+
-+ cfi_send_gen_cmd(0xf0, 0x5555, base, map, cfi, cfi->device_type, NULL);
-+ return cfi_sststd_setup(map);
-+}
-+
-+static struct mtd_info *cfi_sststd_setup(struct map_info *map)
-+{
-+ struct cfi_private *cfi = map->fldrv_priv;
-+ struct mtd_info *mtd;
-+ unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave;
-+
-+ mtd = kmalloc(sizeof(*mtd), GFP_KERNEL);
-+ printk("number of %s chips: %d\n", (cfi->cfi_mode)?"JEDEC":"CFI",cfi->numchips);
-+
-+ if (!mtd) {
-+ printk("Failed to allocate memory for MTD device\n");
-+ kfree(cfi->cmdset_priv);
-+ return NULL;
-+ }
-+
-+ memset(mtd, 0, sizeof(*mtd));
-+ mtd->priv = map;
-+ mtd->type = MTD_NORFLASH;
-+ /* Also select the correct geometry setup too */
-+ mtd->size = devsize * cfi->numchips;
-+
-+ if (cfi->cfiq->NumEraseRegions == 1) {
-+ /* No need to muck about with multiple erase sizes */
-+ mtd->erasesize = ((cfi->cfiq->EraseRegionInfo[0] >> 8) & ~0xff) * cfi->interleave;
-+ } else {
-+ unsigned long offset = 0;
-+ int i,j;
-+
-+ mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips;
-+ mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) * mtd->numeraseregions, GFP_KERNEL);
-+ if (!mtd->eraseregions) {
-+ printk("Failed to allocate memory for MTD erase region info\n");
-+ kfree(cfi->cmdset_priv);
-+ return NULL;
-+ }
-+
-+ 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;
-+ }
-+ for (j=0; j<cfi->numchips; j++) {
-+ mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset;
-+ mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize;
-+ mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum;
-+ }
-+ offset += (ersize * ernum);
-+ }
-+
-+ // debug
-+ for (i=0; i<mtd->numeraseregions;i++){
-+ printk("%d: offset=0x%x,size=0x%x,blocks=%d\n",
-+ i,mtd->eraseregions[i].offset,
-+ mtd->eraseregions[i].erasesize,
-+ mtd->eraseregions[i].numblocks);
-+ }
-+ }
-+
-+ switch (CFIDEV_BUSWIDTH)
-+ {
-+ case 1:
-+ case 2:
-+ case 4:
-+ if (mtd->numeraseregions > 1)
-+ mtd->erase = cfi_sststd_erase_varsize;
-+ else
-+ mtd->erase = cfi_sststd_erase_onesize;
-+ mtd->read = cfi_sststd_read;
-+ mtd->write = cfi_sststd_write;
-+ break;
-+
-+ default:
-+ printk("Unsupported buswidth\n");
-+ kfree(mtd);
-+ kfree(cfi->cmdset_priv);
-+ return NULL;
-+ break;
-+ }
-+ mtd->sync = cfi_sststd_sync;
-+ mtd->suspend = cfi_sststd_suspend;
-+ mtd->resume = cfi_sststd_resume;
-+ mtd->flags = MTD_CAP_NORFLASH;
-+ map->fldrv = &cfi_sststd_chipdrv;
-+ mtd->name = map->name;
-+ MOD_INC_USE_COUNT;
-+ return mtd;
-+}
-+
-+static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf)
-+{
-+ DECLARE_WAITQUEUE(wait, current);
-+ unsigned long timeo = jiffies + HZ;
-+
-+ retry:
-+ cfi_spin_lock(chip->mutex);
-+
-+ if (chip->state != FL_READY){
-+ printk("Waiting for chip to read, status = %d\n", chip->state);
-+ set_current_state(TASK_UNINTERRUPTIBLE);
-+ add_wait_queue(&chip->wq, &wait);
-+
-+ cfi_spin_unlock(chip->mutex);
-+
-+ schedule();
-+ remove_wait_queue(&chip->wq, &wait);
-+ timeo = jiffies + HZ;
-+
-+ goto retry;
-+ }
-+
-+ adr += chip->start;
-+
-+ chip->state = FL_READY;
-+
-+ map->copy_from(map, buf, adr, len);
-+
-+ wake_up(&chip->wq);
-+ cfi_spin_unlock(chip->mutex);
-+
-+ return 0;
-+}
-+
-+static int cfi_sststd_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
-+{
-+ struct map_info *map = mtd->priv;
-+ struct cfi_private *cfi = map->fldrv_priv;
-+ unsigned long ofs;
-+ int chipnum;
-+ int ret = 0;
-+
-+ /* ofs: offset within the first chip that the first read should start */
-+
-+ chipnum = (from >> cfi->chipshift);
-+ ofs = from - (chipnum << cfi->chipshift);
-+
-+
-+ *retlen = 0;
-+
-+ while (len) {
-+ unsigned long thislen;
-+
-+ if (chipnum >= cfi->numchips)
-+ break;
-+
-+ if ((len + ofs -1) >> cfi->chipshift)
-+ thislen = (1<<cfi->chipshift) - ofs;
-+ else
-+ thislen = len;
-+
-+ ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf);
-+ if (ret)
-+ break;
-+
-+ *retlen += thislen;
-+ len -= thislen;
-+ buf += thislen;
-+
-+ ofs = 0;
-+ chipnum++;
-+ }
-+ return ret;
-+}
-+
-+static int do_write_oneword(struct map_info *map, struct flchip *chip, unsigned long adr, __u32 datum, int fast)
-+{
-+ unsigned long timeo = jiffies + HZ;
-+ unsigned int Last[4];
-+ unsigned long Count = 0;
-+ struct cfi_private *cfi = map->fldrv_priv;
-+ DECLARE_WAITQUEUE(wait, current);
-+ int ret = 0;
-+
-+ retry:
-+ cfi_spin_lock(chip->mutex);
-+
-+ if (chip->state != FL_READY){
-+ printk("Waiting for chip to write, status = %d\n", chip->state);
-+ set_current_state(TASK_UNINTERRUPTIBLE);
-+ add_wait_queue(&chip->wq, &wait);
-+
-+ cfi_spin_unlock(chip->mutex);
-+
-+ schedule();
-+ remove_wait_queue(&chip->wq, &wait);
-+ printk("Wake up to write:\n");
-+ timeo = jiffies + HZ;
-+
-+ goto retry;
-+ }
-+
-+ chip->state = FL_WRITING;
-+
-+ adr += chip->start;
-+ ENABLE_VPP(map);
-+ cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, CFI_DEVICETYPE_X16, NULL);
-+ cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, CFI_DEVICETYPE_X16, NULL);
-+ cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, CFI_DEVICETYPE_X16, NULL);
-+
-+ cfi_write(map, datum, adr);
-+
-+ cfi_spin_unlock(chip->mutex);
-+ cfi_udelay(chip->word_write_time);
-+ cfi_spin_lock(chip->mutex);
-+
-+ Last[0] = cfi_read(map, adr);
-+ // printk("Last[0] is %x\n", Last[0]);
-+ Last[1] = cfi_read(map, adr);
-+ // printk("Last[1] is %x\n", Last[1]);
-+ Last[2] = cfi_read(map, adr);
-+ // printk("Last[2] is %x\n", Last[2]);
-+
-+ for (Count = 3; Last[(Count - 1) % 4] != Last[(Count - 2) % 4] && Count < 10000; Count++){
-+ cfi_spin_unlock(chip->mutex);
-+ cfi_udelay(10);
-+ cfi_spin_lock(chip->mutex);
-+
-+ Last[Count % 4] = cfi_read(map, adr);
-+ // printk("Last[%d%%4] is %x\n", Count, Last[Count%4]);
-+ }
-+
-+ if (Last[(Count - 1) % 4] != datum){
-+ printk("Last[%ld] is %x, datum is %x\n",(Count - 1) % 4,Last[(Count - 1) % 4],datum);
-+ cfi_send_gen_cmd(0xF0, 0, chip->start, map, cfi, cfi->device_type, NULL);
-+ DISABLE_VPP(map);
-+ ret = -EIO;
-+ }
-+ DISABLE_VPP(map);
-+ chip->state = FL_READY;
-+ wake_up(&chip->wq);
-+ cfi_spin_unlock(chip->mutex);
-+
-+ return ret;
-+}
-+
-+static int cfi_sststd_write (struct mtd_info *mtd, loff_t to , size_t len, size_t *retlen, const u_char *buf)
-+{
-+ struct map_info *map = mtd->priv;
-+ struct cfi_private *cfi = map->fldrv_priv;
-+ int ret = 0;
-+ int chipnum;
-+ unsigned long ofs, chipstart;
-+
-+ *retlen = 0;
-+ if (!len)
-+ return 0;
-+
-+ chipnum = to >> cfi->chipshift;
-+ ofs = to - (chipnum << cfi->chipshift);
-+ chipstart = cfi->chips[chipnum].start;
-+
-+ /* If it's not bus-aligned, do the first byte write */
-+ if (ofs & (CFIDEV_BUSWIDTH-1)) {
-+ unsigned long bus_ofs = ofs & ~(CFIDEV_BUSWIDTH-1);
-+ int i = ofs - bus_ofs;
-+ int n = 0;
-+ u_char tmp_buf[4];
-+ __u32 datum;
-+
-+ map->copy_from(map, tmp_buf, bus_ofs + cfi->chips[chipnum].start, CFIDEV_BUSWIDTH);
-+ while (len && i < CFIDEV_BUSWIDTH)
-+ tmp_buf[i++] = buf[n++], len--;
-+
-+ if (cfi_buswidth_is_2()) {
-+ datum = *(__u16*)tmp_buf;
-+ } else if (cfi_buswidth_is_4()) {
-+ datum = *(__u32*)tmp_buf;
-+ } else {
-+ return -EINVAL; /* should never happen, but be safe */
-+ }
-+
-+ ret = do_write_oneword(map, &cfi->chips[chipnum],
-+ bus_ofs, datum, 0);
-+ if (ret)
-+ return ret;
-+
-+ ofs += n;
-+ buf += n;
-+ (*retlen) += n;
-+
-+ if (ofs >> cfi->chipshift) {
-+ chipnum ++;
-+ ofs = 0;
-+ if (chipnum == cfi->numchips)
-+ return 0;
-+ }
-+ }
-+
-+ /* We are now aligned, write as much as possible */
-+ while(len >= CFIDEV_BUSWIDTH) {
-+ __u32 datum;
-+
-+ if (cfi_buswidth_is_1()) {
-+ datum = *(__u8*)buf;
-+ } else if (cfi_buswidth_is_2()) {
-+ datum = *(__u16*)buf;
-+ } else if (cfi_buswidth_is_4()) {
-+ datum = *(__u32*)buf;
-+ } else {
-+ return -EINVAL;
-+ }
-+ ret = do_write_oneword(map, &cfi->chips[chipnum],
-+ ofs, datum, cfi->fast_prog);
-+ if (ret) {
-+ return ret;
-+ }
-+
-+ ofs += CFIDEV_BUSWIDTH;
-+ buf += CFIDEV_BUSWIDTH;
-+ (*retlen) += CFIDEV_BUSWIDTH;
-+ len -= CFIDEV_BUSWIDTH;
-+
-+ if (ofs >> cfi->chipshift) {
-+ chipnum ++;
-+ ofs = 0;
-+ if (chipnum == cfi->numchips)
-+ return 0;
-+ chipstart = cfi->chips[chipnum].start;
-+ }
-+ }
-+
-+ if (len & (CFIDEV_BUSWIDTH-1)) {
-+ int i = 0, n = 0;
-+ u_char tmp_buf[4];
-+ __u32 datum;
-+
-+ map->copy_from(map, tmp_buf, ofs + cfi->chips[chipnum].start, CFIDEV_BUSWIDTH);
-+ while (len--)
-+ tmp_buf[i++] = buf[n++];
-+
-+ if (cfi_buswidth_is_2()) {
-+ datum = *(__u16*)tmp_buf;
-+ } else if (cfi_buswidth_is_4()) {
-+ datum = *(__u32*)tmp_buf;
-+ } else {
-+ return -EINVAL; /* should never happen, but be safe */
-+ }
-+
-+ ret = do_write_oneword(map, &cfi->chips[chipnum],
-+ ofs, datum, 0);
-+ if (ret)
-+ return ret;
-+
-+ (*retlen) += n;
-+ }
-+
-+ return 0;
-+}
-+
-+static inline int do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr)
-+{
-+ unsigned int status;
-+ unsigned long timeo = jiffies + HZ;
-+ struct cfi_private *cfi = map->fldrv_priv;
-+ unsigned int rdy_mask;
-+ DECLARE_WAITQUEUE(wait, current);
-+
-+ retry:
-+ cfi_spin_lock(chip->mutex);
-+
-+ if (chip->state != FL_READY){
-+ set_current_state(TASK_UNINTERRUPTIBLE);
-+ add_wait_queue(&chip->wq, &wait);
-+
-+ cfi_spin_unlock(chip->mutex);
-+
-+ schedule();
-+ remove_wait_queue(&chip->wq, &wait);
-+ timeo = jiffies + HZ;
-+
-+ goto retry;
-+ }
-+
-+ chip->state = FL_ERASING;
-+
-+ adr += chip->start;
-+ ENABLE_VPP(map);
-+ cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, CFI_DEVICETYPE_X16, NULL);
-+ cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, CFI_DEVICETYPE_X16, NULL);
-+ cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, CFI_DEVICETYPE_X16, NULL);
-+ cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, CFI_DEVICETYPE_X16, NULL);
-+ cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, CFI_DEVICETYPE_X16, NULL);
-+ cfi_write(map, CMD(0x30), adr);
-+
-+ timeo = jiffies + (HZ*20);
-+
-+ cfi_spin_unlock(chip->mutex);
-+ schedule_timeout(HZ);
-+ cfi_spin_lock(chip->mutex);
-+
-+ rdy_mask = CMD(0x80);
-+
-+ /* Once the state machine's known to be working I'll do that */
-+
-+ while ( ( (status = cfi_read(map,adr)) & rdy_mask ) != rdy_mask ) {
-+ static int z=0;
-+
-+ if (chip->state != FL_ERASING) {
-+ /* Someone's suspended the erase. Sleep */
-+ set_current_state(TASK_UNINTERRUPTIBLE);
-+ add_wait_queue(&chip->wq, &wait);
-+
-+ cfi_spin_unlock(chip->mutex);
-+ printk("erase suspended. Sleeping\n");
-+
-+ schedule();
-+ remove_wait_queue(&chip->wq, &wait);
-+ timeo = jiffies + (HZ*2);
-+ cfi_spin_lock(chip->mutex);
-+ continue;
-+ }
-+
-+ /* OK Still waiting */
-+ if (time_after(jiffies, timeo)) {
-+ chip->state = FL_READY;
-+ cfi_spin_unlock(chip->mutex);
-+ printk("waiting for erase to complete timed out.");
-+ DISABLE_VPP(map);
-+ return -EIO;
-+ }
-+
-+ /* Latency issues. Drop the lock, wait a while and retry */
-+ cfi_spin_unlock(chip->mutex);
-+
-+ z++;
-+ if ( 0 && !(z % 100 ))
-+ printk("chip not ready yet after erase. looping\n");
-+
-+ cfi_udelay(1);
-+
-+ cfi_spin_lock(chip->mutex);
-+ continue;
-+ }
-+
-+ /* Done and happy. */
-+ DISABLE_VPP(map);
-+ chip->state = FL_READY;
-+ wake_up(&chip->wq);
-+ cfi_spin_unlock(chip->mutex);
-+ return 0;
-+}
-+
-+static int cfi_sststd_erase_varsize(struct mtd_info *mtd, struct erase_info *instr)
-+{
-+ struct map_info *map = mtd->priv;
-+ struct cfi_private *cfi = map->fldrv_priv;
-+ unsigned long adr, len;
-+ int chipnum, ret = 0;
-+ int i, first;
-+ struct mtd_erase_region_info *regions = mtd->eraseregions;
-+
-+ if (instr->addr > mtd->size)
-+ return -EINVAL;
-+
-+ if ((instr->len + instr->addr) > mtd->size)
-+ return -EINVAL;
-+
-+ /* Check that both start and end of the requested erase are
-+ * aligned with the erasesize at the appropriate addresses.
-+ */
-+
-+ i = 0;
-+
-+ /* Skip all erase regions which are ended before the start of
-+ the requested erase. Actually, to save on the calculations,
-+ we skip to the first erase region which starts after the
-+ start of the requested erase, and then go back one.
-+ */
-+
-+ while (i < mtd->numeraseregions && instr->addr >= regions[i].offset)
-+ i++;
-+ i--;
-+
-+ /* OK, now i is pointing at the erase region in which this
-+ erase request starts. Check the start of the requested
-+ erase range is aligned with the erase size which is in
-+ effect here.
-+ */
-+
-+ if (instr->addr & (regions[i].erasesize-1))
-+ return -EINVAL;
-+
-+ /* Remember the erase region we start on */
-+ first = i;
-+
-+ /* Next, check that the end of the requested erase is aligned
-+ * with the erase region at that address.
-+ */
-+
-+ while (i<mtd->numeraseregions && (instr->addr + instr->len) >= regions[i].offset)
-+ i++;
-+
-+ /* As before, drop back one to point at the region in which
-+ the address actually falls
-+ */
-+ i--;
-+
-+ if ((instr->addr + instr->len) & (regions[i].erasesize-1))
-+ return -EINVAL;
-+
-+ chipnum = instr->addr >> cfi->chipshift;
-+ adr = instr->addr - (chipnum << cfi->chipshift);
-+ len = instr->len;
-+
-+ i=first;
-+
-+ while(len) {
-+ ret = do_erase_oneblock(map, &cfi->chips[chipnum], adr);
-+
-+ if (ret)
-+ return ret;
-+
-+ adr += regions[i].erasesize;
-+ len -= regions[i].erasesize;
-+
-+ if (adr % (1<< cfi->chipshift) == ((regions[i].offset + (regions[i].erasesize * regions[i].numblocks)) %( 1<< cfi->chipshift)))
-+ i++;
-+
-+ if (adr >> cfi->chipshift) {
-+ adr = 0;
-+ chipnum++;
-+
-+ if (chipnum >= cfi->numchips)
-+ break;
-+ }
-+ }
-+
-+ instr->state = MTD_ERASE_DONE;
-+ if (instr->callback)
-+ instr->callback(instr);
-+
-+ return 0;
-+}
-+
-+static int cfi_sststd_erase_onesize(struct mtd_info *mtd, struct erase_info *instr)
-+{
-+ struct map_info *map = mtd->priv;
-+ struct cfi_private *cfi = map->fldrv_priv;
-+ unsigned long adr, len;
-+ int chipnum, ret = 0;
-+
-+ if (instr->addr & (mtd->erasesize - 1))
-+ return -EINVAL;
-+
-+ if (instr->len & (mtd->erasesize -1))
-+ return -EINVAL;
-+
-+ if ((instr->len + instr->addr) > mtd->size)
-+ return -EINVAL;
-+
-+ chipnum = instr->addr >> cfi->chipshift;
-+ adr = instr->addr - (chipnum << cfi->chipshift);
-+ len = instr->len;
-+
-+ while(len) {
-+ ret = do_erase_oneblock(map, &cfi->chips[chipnum], adr);
-+
-+ if (ret)
-+ return ret;
-+
-+ adr += mtd->erasesize;
-+ len -= mtd->erasesize;
-+
-+ if (adr >> cfi->chipshift) {
-+ adr = 0;
-+ chipnum++;
-+
-+ if (chipnum >= cfi->numchips)
-+ break;
-+ }
-+ }
-+
-+ instr->state = MTD_ERASE_DONE;
-+ if (instr->callback)
-+ instr->callback(instr);
-+
-+ return 0;
-+}
-+
-+static void cfi_sststd_sync (struct mtd_info *mtd)
-+{
-+ struct map_info *map = mtd->priv;
-+ struct cfi_private *cfi = map->fldrv_priv;
-+ int i;
-+ struct flchip *chip;
-+ int ret = 0;
-+ DECLARE_WAITQUEUE(wait, current);
-+
-+ for (i=0; !ret && i<cfi->numchips; i++) {
-+ chip = &cfi->chips[i];
-+
-+ retry:
-+ cfi_spin_lock(chip->mutex);
-+
-+ switch(chip->state) {
-+ case FL_READY:
-+ case FL_STATUS:
-+ case FL_CFI_QUERY:
-+ case FL_JEDEC_QUERY:
-+ chip->oldstate = chip->state;
-+ chip->state = FL_SYNCING;
-+ /* 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);
-+ break;
-+
-+ default:
-+ /* Not an idle state */
-+ add_wait_queue(&chip->wq, &wait);
-+
-+ cfi_spin_unlock(chip->mutex);
-+
-+ schedule();
-+
-+ remove_wait_queue(&chip->wq, &wait);
-+
-+ goto retry;
-+ }
-+ }
-+
-+ /* Unlock the chips again */
-+
-+ for (i--; i >=0; i--) {
-+ chip = &cfi->chips[i];
-+
-+ cfi_spin_lock(chip->mutex);
-+
-+ if (chip->state == FL_SYNCING) {
-+ chip->state = chip->oldstate;
-+ wake_up(&chip->wq);
-+ }
-+ cfi_spin_unlock(chip->mutex);
-+ }
-+}
-+
-+
-+static int cfi_sststd_suspend(struct mtd_info *mtd)
-+{
-+ struct map_info *map = mtd->priv;
-+ struct cfi_private *cfi = map->fldrv_priv;
-+ int i;
-+ struct flchip *chip;
-+ int ret = 0;
-+//printk("suspend\n");
-+
-+ for (i=0; !ret && i<cfi->numchips; i++) {
-+ chip = &cfi->chips[i];
-+
-+ cfi_spin_lock(chip->mutex);
-+
-+ switch(chip->state) {
-+ case FL_READY:
-+ case FL_STATUS:
-+ case FL_CFI_QUERY:
-+ case FL_JEDEC_QUERY:
-+ chip->oldstate = chip->state;
-+ chip->state = FL_PM_SUSPENDED;
-+ /* 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_PM_SUSPENDED:
-+ break;
-+
-+ default:
-+ ret = -EAGAIN;
-+ break;
-+ }
-+ cfi_spin_unlock(chip->mutex);
-+ }
-+
-+ /* Unlock the chips again */
-+
-+ if (ret) {
-+ for (i--; i >=0; i--) {
-+ chip = &cfi->chips[i];
-+
-+ cfi_spin_lock(chip->mutex);
-+
-+ if (chip->state == FL_PM_SUSPENDED) {
-+ chip->state = chip->oldstate;
-+ wake_up(&chip->wq);
-+ }
-+ cfi_spin_unlock(chip->mutex);
-+ }
-+ }
-+
-+ return ret;
-+}
-+
-+static void cfi_sststd_resume(struct mtd_info *mtd)
-+{
-+ struct map_info *map = mtd->priv;
-+ struct cfi_private *cfi = map->fldrv_priv;
-+ int i;
-+ struct flchip *chip;
-+//printk("resume\n");
-+
-+ for (i=0; i<cfi->numchips; i++) {
-+
-+ chip = &cfi->chips[i];
-+
-+ cfi_spin_lock(chip->mutex);
-+
-+ if (chip->state == FL_PM_SUSPENDED) {
-+ chip->state = FL_READY;
-+ cfi_write(map, CMD(0xF0), chip->start);
-+ wake_up(&chip->wq);
-+ }
-+ else
-+ printk("Argh. Chip not in PM_SUSPENDED state upon resume()\n");
-+
-+ cfi_spin_unlock(chip->mutex);
-+ }
-+}
-+
-+static void cfi_sststd_destroy(struct mtd_info *mtd)
-+{
-+ struct map_info *map = mtd->priv;
-+ struct cfi_private *cfi = map->fldrv_priv;
-+ kfree(cfi->cmdset_priv);
-+ kfree(cfi);
-+}
-+
-+#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
-+#define cfi_sststd_init init_module
-+#define cfi_sststd_exit cleanup_module
-+#endif
-+
-+static char im_name[]="cfi_cmdset_0701";
-+
-+mod_init_t cfi_sststd_init(void)
-+{
-+ inter_module_register(im_name, THIS_MODULE, &cfi_cmdset_0701);
-+ return 0;
-+}
-+
-+mod_exit_t cfi_sststd_exit(void)
-+{
-+ inter_module_unregister(im_name);
-+}
-+
-+module_init(cfi_sststd_init);
-+module_exit(cfi_sststd_exit);
-+
-diff -urN linux-2.4.30/drivers/mtd/chips/cfi_probe.c linux-2.4.30.dev/drivers/mtd/chips/cfi_probe.c
---- linux-2.4.30/drivers/mtd/chips/cfi_probe.c 2003-06-13 16:51:34.000000000 +0200
-+++ linux-2.4.30.dev/drivers/mtd/chips/cfi_probe.c 2005-08-22 01:34:46.434134592 +0200
-@@ -67,8 +67,15 @@
- cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL);
- cfi_send_gen_cmd(0x98, 0x55, base, map, cfi, cfi->device_type, NULL);
-
-- if (!qry_present(map,base,cfi))
-- return 0;
-+ if (!qry_present(map,base,cfi)) {
-+ /* rather broken SST cfi probe (requires SST unlock) */
-+ cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL);
-+ cfi_send_gen_cmd(0xAA, 0x5555, base, map, cfi, cfi->device_type, NULL);
-+ cfi_send_gen_cmd(0x55, 0x2AAA, base, map, cfi, cfi->device_type, NULL);
-+ cfi_send_gen_cmd(0x98, 0x5555, base, map, cfi, cfi->device_type, NULL);
-+ if (!qry_present(map,base,cfi))
-+ return 0;
-+ }
-
- if (!cfi->numchips) {
- /* This is the first time we're called. Set up the CFI
-diff -urN linux-2.4.30/drivers/mtd/chips/gen_probe.c linux-2.4.30.dev/drivers/mtd/chips/gen_probe.c
---- linux-2.4.30/drivers/mtd/chips/gen_probe.c 2003-08-25 13:44:42.000000000 +0200
-+++ linux-2.4.30.dev/drivers/mtd/chips/gen_probe.c 2005-08-22 01:34:46.436134288 +0200
-@@ -332,9 +332,13 @@
- return cfi_cmdset_0002(map, primary);
- #endif
- #ifdef CONFIG_MTD_CFI_STAA
-- case 0x0020:
-+ case 0x0020:
- return cfi_cmdset_0020(map, primary);
- #endif
-+#ifdef CONFIG_MTD_CFI_SSTSTD
-+ case 0x0701:
-+ return cfi_cmdset_0701(map, primary);
-+#endif
- }
-
- return cfi_cmdset_unknown(map, primary);
projects / openwrt.git / commitdiff