patch-2.4.6 linux/drivers/mtd/cfi_probe.c
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- Lines: 518
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.4.5/linux/drivers/mtd/cfi_probe.c
- Orig date:
Fri Feb 9 11:30:23 2001
diff -u --recursive --new-file v2.4.5/linux/drivers/mtd/cfi_probe.c linux/drivers/mtd/cfi_probe.c
@@ -1,517 +0,0 @@
-/*
- Common Flash Interface probe code.
- (C) 2000 Red Hat. GPL'd.
- $Id: cfi_probe.c,v 1.12 2000/07/03 13:29:16 dwmw2 Exp $
-*/
-
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <asm/io.h>
-#include <asm/byteorder.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-
-#include <linux/mtd/map.h>
-#include <linux/mtd/cfi.h>
-
-
-struct mtd_info *cfi_probe(struct map_info *);
-
-static void print_cfi_ident(struct cfi_ident *);
-static void check_cmd_set(struct map_info *, int, unsigned long);
-static struct cfi_private *cfi_cfi_probe(struct map_info *);
-
-static const char im_name[] = "cfi_probe";
-
-/* This routine is made available to other mtd code via
- * inter_module_register. It must only be accessed through
- * inter_module_get which will bump the use count of this module. The
- * addresses passed back in mtd are valid as long as the use count of
- * this module is non-zero, i.e. between inter_module_get and
- * inter_module_put. Keith Owens <kaos@ocs.com.au> 29 Oct 2000.
- */
-struct mtd_info *cfi_probe(struct map_info *map)
-{
- struct mtd_info *mtd = NULL;
- struct cfi_private *cfi;
- /* First probe the map to see if we have CFI stuff there. */
- cfi = cfi_cfi_probe(map);
-
- if (!cfi)
- return NULL;
-
- map->fldrv_priv = cfi;
- map->im_name = im_name;
-
- /* OK we liked it. Now find a driver for the command set it talks */
-
- check_cmd_set(map, 1, cfi->chips[0].start); /* First the primary cmdset */
- check_cmd_set(map, 0, cfi->chips[0].start); /* Then the secondary */
-
- /* check_cmd_set() will have used inter_module_get to increase
- the use count of the module which provides the command set
- driver. If we're quitting, we have to decrease it again.
- */
-
- if(cfi->cmdset_setup) {
- mtd = cfi->cmdset_setup(map);
-
- if (mtd)
- return mtd;
- inter_module_put(cfi->im_name);
- }
- printk("No supported Vendor Command Set found\n");
-
- kfree(cfi);
- map->fldrv_priv = NULL;
- return NULL;
-
-}
-
-static int cfi_probe_new_chip(struct map_info *map, unsigned long base,
- struct flchip *chips, struct cfi_private *cfi)
-{
- switch (map->buswidth) {
-
- case 1: {
- unsigned char tmp = map->read8(map, base + 0x55);
-
- /* If there's a device there, put it in Query Mode */
- map->write8(map, 0x98, base+0x55);
-
- if (map->read8(map,base+0x10) == 'Q' &&
- map->read8(map,base+0x11) == 'R' &&
- map->read8(map,base+0x12) == 'Y') {
- printk("%s: Found a CFI device at 0x%lx in 8 bit mode\n", map->name, base);
- if (chips) {
- /* Check previous chips for aliases */
- printk("FIXME: Do alias check at line %d of cfi_probe.c\n", __LINE__);
- /* Put it back into Read Mode */
- map->write8(map, 0x98, base+0x55);
- }
- return 1;
- } else {
- if (map->read8(map, base + 0x55) == 0x98) {
- /* It looks like RAM. Put back the stuff we overwrote */
- map->write8(map, tmp, base+0x55);
- }
- return 0;
- }
- }
-
- case 2: {
- __u16 tmp = map->read16(map, base + 0xaa);
-
- /* If there's a device there, put it into Query Mode */
- map->write16(map, 0x9898, base+0xAA);
-
- if (map->read16(map, base+0x20) == cpu_to_le16(0x0051) &&
- map->read16(map, base+0x22) == cpu_to_le16(0x0052) &&
- map->read16(map, base+0x24) == cpu_to_le16(0x0059)) {
- printk("%s: Found a CFI device at 0x%lx in 16 bit mode\n", map->name, base);
- if (chips) {
- /* Check previous chips for aliases */
- int i;
-
- for (i=0; i < cfi->numchips; i++) {
- /* This chip should be in read mode if it's one
- we've already touched. */
- if (map->read16(map, chips[i].start+0x20) == cpu_to_le16(0x0051) &&
- map->read16(map, chips[i].start+0x22) == cpu_to_le16(0x0052) &&
- map->read16(map, chips[i].start+0x24) == cpu_to_le16(0x0059)){
- /* Either the old chip has got 'Q''R''Y' in a most
- unfortunate place, or it's an alias of the new
- chip. Double-check that it's in read mode, and check. */
- map->write16(map, 0xffff, chips[i].start+0x20);
- if (map->read16(map, chips[i].start+0x20) == cpu_to_le16(0x0051) &&
- map->read16(map, chips[i].start+0x22) == cpu_to_le16(0x0052) &&
- map->read16(map, chips[i].start+0x24) == cpu_to_le16(0x0059)) {
- /* Yes it's got QRY for data. Most unfortunate.
- Stick the old one in read mode too. */
- map->write16(map, 0xffff, base);
- if (map->read16(map, base+0x20) == cpu_to_le16(0x0051) &&
- map->read16(map, base+0x22) == cpu_to_le16(0x0052) &&
- map->read16(map, base+0x24) == cpu_to_le16(0x0059)) {
- /* OK, so has the new one. Assume it's an alias */
- printk("T'was probably an alias for the chip at 0x%lx\n", chips[i].start);
- return 1;
- } /* else no, they're different, fall through. */
- } else {
- /* No the old one hasn't got QRY for data. Therefore,
- it's an alias of the new one. */
- map->write16(map, 0xffff, base+0xaa);
- /* Just to be paranoid. */
- map->write16(map, 0xffff, chips[i].start+0xaa);
- printk("T'was an alias for the chip at 0x%lx\n", chips[i].start);
- return 1;
- }
- }
- /* No, the old one didn't look like it's in query mode. Next. */
- }
-
- /* OK, if we got to here, then none of the previous chips appear to
- be aliases for the current one. */
- if (cfi->numchips == MAX_CFI_CHIPS) {
- printk("%s: Too many flash chips detected. Increase MAX_CFI_CHIPS from %d.\n", map->name, MAX_CFI_CHIPS);
- /* Doesn't matter about resetting it to Read Mode - we're not going to talk to it anyway */
- return 1;
- }
- printk("Not an alias. Adding\n");
- chips[cfi->numchips].start = base;
- chips[cfi->numchips].state = FL_READY;
- chips[cfi->numchips].mutex = &chips[cfi->numchips]._spinlock;
- cfi->numchips++;
-
- /* Put it back into Read Mode */
- map->write16(map, 0xffff, base+0xaa);
- }
-
- return 1;
- }
- else if (map->read16(map, base+0x20) == 0x5151 &&
- map->read16(map, base+0x22) == 0x5252 &&
- map->read16(map, base+0x24) == 0x5959) {
- printk("%s: Found a coupled pair of CFI devices at %lx in 8 bit mode\n",
- map->name, base);
- if (chips) {
- /* Check previous chips for aliases */
- printk("FIXME: Do alias check at line %d of cfi_probe.c\n", __LINE__);
-
- /* Put it back into Read Mode */
- map->write16(map, 0xffff, base+0xaa);
- }
-
- return 2;
- } else {
- if (map->read16(map, base+0xaa) == 0x9898) {
- /* It looks like RAM. Put back the stuff we overwrote */
- map->write16(map, tmp, base+0xaa);
- }
- return 0;
- }
- }
-
-
- case 4: {
- __u32 tmp = map->read32(map, base+0x154);
-
- /* If there's a device there, put it into Query Mode */
- map->write32(map, 0x98989898, base+0x154);
-
- if (map->read32(map, base+0x40) == cpu_to_le32(0x00000051) &&
- map->read32(map, base+0x44) == cpu_to_le32(0x00000052) &&
- map->read32(map, base+0x48) == cpu_to_le32(0x00000059)) {
- /* This isn't actually in the CFI spec - only x8 and x16 are. */
- printk("%s: Found a CFI device at %lx in 32 bit mode\n", map->name, base);
- if (chips) {
- /* Check previous chips for aliases */
- printk("FIXME: Do alias check at line %d of cfi_probe.c\n", __LINE__);
-
- /* Put it back into read mode */
- map->write32(map, 0xffffffff, base+0x154);
- }
- return 1;
- }
- else if (map->read32(map, base+0x40) == cpu_to_le32(0x00510051) &&
- map->read32(map, base+0x44) == cpu_to_le32(0x00520052) &&
- map->read32(map, base+0x48) == cpu_to_le32(0x00590059)) {
- printk("%s: Found a coupled pair of CFI devices at location %lx in 16 bit mode\n", map->name, base);
- if (chips) {
- /* Check previous chips for aliases */
- printk("FIXME: Do alias check at line %d of cfi_probe.c\n", __LINE__);
-
- /* Put it back into read mode */
- map->write32(map, 0xffffffff, base+0x154);
- }
- return 2;
- }
- else if (map->read32(map, base+0x40) == 0x51515151 &&
- map->read32(map, base+0x44) == 0x52525252 &&
- map->read32(map, base+0x48) == 0x59595959) {
- printk("%s: Found four side-by-side CFI devices at location %lx in 8 bit mode\n", map->name, base);
- if (chips) {
- /* Check previous chips for aliases */
- printk("FIXME: Do alias check at line %d of cfi_probe.c\n", __LINE__);
-
- /* Put it back into read mode */
- map->write32(map, 0xffffffff, base+0x154);
- }
- return 4;
- } else {
- if (map->read32(map, base+0x154) == 0x98989898) {
- /* It looks like RAM. Put back the stuff we overwrote */
- map->write32(map, tmp, base+0x154);
- }
- return 0;
- }
- }
- default:
- printk(KERN_WARNING "cfi_probe called with strange buswidth %d\n", map->buswidth);
- return 0;
- }
-}
-
-static struct cfi_private *cfi_cfi_probe(struct map_info *map)
-{
- unsigned long base=0;
- struct cfi_private cfi;
- struct cfi_private *retcfi;
- struct flchip chip[MAX_CFI_CHIPS];
- int i;
-
- memset(&cfi, 0, sizeof(cfi));
-
- /* The first invocation (with chips == NULL) leaves the device in Query Mode */
- cfi.interleave = cfi_probe_new_chip(map, 0, NULL, NULL);
-
- if (!cfi.interleave) {
- printk("%s: Found no CFI device at location zero\n", map->name);
- /* Doesn't appear to be CFI-compliant at all */
- return NULL;
- }
-
- /* Read the Basic Query Structure from the device */
-
- for (i=0; i<sizeof(struct cfi_ident); i++) {
- ((unsigned char *)&cfi.cfiq)[i] = map->read8(map,base + ((0x10 + i)*map->buswidth));
- }
-
- /* Do any necessary byteswapping */
- cfi.cfiq.P_ID = le16_to_cpu(cfi.cfiq.P_ID);
- cfi.cfiq.P_ADR = le16_to_cpu(cfi.cfiq.P_ADR);
- cfi.cfiq.A_ID = le16_to_cpu(cfi.cfiq.A_ID);
- cfi.cfiq.A_ADR = le16_to_cpu(cfi.cfiq.A_ADR);
- cfi.cfiq.InterfaceDesc = le16_to_cpu(cfi.cfiq.InterfaceDesc);
- cfi.cfiq.MaxBufWriteSize = le16_to_cpu(cfi.cfiq.MaxBufWriteSize);
-
-#if 1
- /* Dump the information therein */
- print_cfi_ident(&cfi.cfiq);
-
- for (i=0; i<cfi.cfiq.NumEraseRegions; i++) {
- __u16 EraseRegionInfoNum = (map->read8(map,base + ((0x2d + (4*i))*map->buswidth))) +
- (((map->read8(map,(0x2e + (4*i))*map->buswidth)) << 8));
- __u16 EraseRegionInfoSize = (map->read8(map, base + ((0x2f + (4*i))*map->buswidth))) +
- (map->read8(map, base + ((0x30 + (4*i))*map->buswidth)) << 8);
-
- printk(" Erase Region #%d: BlockSize 0x%4.4X bytes, %d blocks\n",
- i, EraseRegionInfoSize * 256, EraseRegionInfoNum+1);
- }
-
- printk("\n");
-#endif
-
- /* Switch the chip back into Read Mode, to make the alias detection work */
- switch(map->buswidth) {
- case 1:
- map->write8(map, 0xff, 0x55);
- break;
- case 2:
- map->write16(map, 0xffff, 0xaa);
- break;
- case 4:
- map->write32(map, 0xffffffff, 0x154);
- break;
- }
-
- /* OK. We've worked out what it is and we're happy with it. Now see if there are others */
-
- chip[0].start = 0;
- chip[0].state = FL_READY;
- chip[0].mutex = &chip[0]._spinlock;
-
- cfi.chipshift = cfi.cfiq.DevSize;
- cfi.numchips = 1;
-
- if (!cfi.chipshift) {
- printk("cfi.chipsize is zero. This is bad. cfi.cfiq.DevSize is %d\n", cfi.cfiq.DevSize);
- return NULL;
- }
-
- for (base = (1<<cfi.chipshift); base < map->size; base += (1<<cfi.chipshift))
- cfi_probe_new_chip(map, base, &chip[0], &cfi);
-
- retcfi = kmalloc(sizeof(struct cfi_private) + cfi.numchips * sizeof(struct flchip), GFP_KERNEL);
-
- if (!retcfi)
- return NULL;
-
- memcpy(retcfi, &cfi, sizeof(cfi));
- memcpy(&retcfi->chips[0], chip, sizeof(struct flchip) * cfi.numchips);
- for (i=0; i< retcfi->numchips; i++) {
- init_waitqueue_head(&retcfi->chips[i].wq);
- spin_lock_init(&retcfi->chips[i]._spinlock);
- }
- return retcfi;
-}
-
-static char *vendorname(__u16 vendor)
-{
- switch (vendor) {
- case P_ID_NONE:
- return "None";
-
- case P_ID_INTEL_EXT:
- return "Intel/Sharp Extended";
-
- case P_ID_AMD_STD:
- return "AMD/Fujitsu Standard";
-
- case P_ID_INTEL_STD:
- return "Intel/Sharp Standard";
-
- case P_ID_AMD_EXT:
- return "AMD/Fujitsu Extended";
-
- case P_ID_MITSUBISHI_STD:
- return "Mitsubishi Standard";
-
- case P_ID_MITSUBISHI_EXT:
- return "Mitsubishi Extended";
-
- case P_ID_RESERVED:
- return "Not Allowed / Reserved for Future Use";
-
- default:
- return "Unknown";
- }
-}
-
-
-static void print_cfi_ident(struct cfi_ident *cfip)
-{
- if (cfip->qry[0] != 'Q' || cfip->qry[1] != 'R' || cfip->qry[2] != 'Y') {
- printk("Invalid CFI ident structure.\n");
- return;
- }
-
- printk("Primary Vendor Command Set: %4.4X (%s)\n", cfip->P_ID, vendorname(cfip->P_ID));
- if (cfip->P_ADR)
- printk("Primary Algorithm Table at %4.4X\n", cfip->P_ADR);
- else
- printk("No Primary Algorithm Table\n");
-
- printk("Alternative Vendor Command Set: %4.4X (%s)\n", cfip->A_ID, vendorname(cfip->A_ID));
- if (cfip->A_ADR)
- printk("Alternate Algorithm Table at %4.4X\n", cfip->A_ADR);
- else
- printk("No Alternate Algorithm Table\n");
-
-
- printk("Vcc Minimum: %x.%x V\n", cfip->VccMin >> 4, cfip->VccMin & 0xf);
- printk("Vcc Maximum: %x.%x V\n", cfip->VccMax >> 4, cfip->VccMax & 0xf);
- if (cfip->VppMin) {
- printk("Vpp Minimum: %x.%x V\n", cfip->VppMin >> 4, cfip->VppMin & 0xf);
- printk("Vpp Maximum: %x.%x V\n", cfip->VppMax >> 4, cfip->VppMax & 0xf);
- }
- else
- printk("No Vpp line\n");
-
- printk("Typical byte/word write timeout: %d µs\n", 1<<cfip->WordWriteTimeoutTyp);
- printk("Maximum byte/word write timeout: %d µs\n", (1<<cfip->WordWriteTimeoutMax) * (1<<cfip->WordWriteTimeoutTyp));
-
- if (cfip->BufWriteTimeoutTyp || cfip->BufWriteTimeoutMax) {
- printk("Typical full buffer write timeout: %d µs\n", 1<<cfip->BufWriteTimeoutTyp);
- printk("Maximum full buffer write timeout: %d µs\n", (1<<cfip->BufWriteTimeoutMax) * (1<<cfip->BufWriteTimeoutTyp));
- }
- else
- printk("Full buffer write not supported\n");
-
- printk("Typical block erase timeout: %d µs\n", 1<<cfip->BlockEraseTimeoutTyp);
- printk("Maximum block erase timeout: %d µs\n", (1<<cfip->BlockEraseTimeoutMax) * (1<<cfip->BlockEraseTimeoutTyp));
- if (cfip->ChipEraseTimeoutTyp || cfip->ChipEraseTimeoutMax) {
- printk("Typical chip erase timeout: %d µs\n", 1<<cfip->ChipEraseTimeoutTyp);
- printk("Maximum chip erase timeout: %d µs\n", (1<<cfip->ChipEraseTimeoutMax) * (1<<cfip->ChipEraseTimeoutTyp));
- }
- else
- printk("Chip erase not supported\n");
-
- printk("Device size: 0x%X bytes (%d Mb)\n", 1 << cfip->DevSize, 1<< (cfip->DevSize - 20));
- printk("Flash Device Interface description: 0x%4.4X\n", cfip->InterfaceDesc);
- switch(cfip->InterfaceDesc) {
- case 0:
- printk(" - x8-only asynchronous interface\n");
- break;
-
- case 1:
- printk(" - x16-only asynchronous interface\n");
- break;
-
- case 2:
- printk(" - supports x8 and x16 via BYTE# with asynchronous interface\n");
- break;
-
- case 3:
- printk(" - x32-only asynchronous interface\n");
- break;
-
- case 65535:
- printk(" - Not Allowed / Reserved\n");
- break;
-
- default:
- printk(" - Unknown\n");
- break;
- }
-
- printk("Max. bytes in buffer write: 0x%x\n", 1<< cfip->MaxBufWriteSize);
- printk("Number of Erase Block Regions: %d\n", cfip->NumEraseRegions);
-
-}
-
-static void check_cmd_set(struct map_info *map, int primary, unsigned long base)
-{
- __u16 adr;
- struct cfi_private *cfi = map->fldrv_priv;
- __u16 type = primary?cfi->cfiq.P_ID:cfi->cfiq.A_ID;
- char probename[32];
- void (*probe_function)(struct map_info *, int, unsigned long);
-
- if (type == P_ID_NONE || type == P_ID_RESERVED)
- return;
-
- sprintf(probename, "cfi_cmdset_%4.4X", type);
-
- probe_function = inter_module_get_request(probename, probename);
- if (probe_function) {
- (*probe_function)(map, primary, base);
- return;
- }
-
- /* This was a command set we don't know about. Print only the basic info */
- adr = primary?cfi->cfiq.P_ADR:cfi->cfiq.A_ADR;
-
- if (!adr) {
- printk(" No Extended Query Table\n");
- }
- else if (map->read8(map,base+(adr*map->buswidth)) != (primary?'P':'A') ||
- map->read8(map,base+((adr+1)*map->buswidth)) != (primary?'R':'L') ||
- map->read8(map,base+((adr+2)*map->buswidth)) != (primary?'I':'T')) {
- printk ("Invalid Extended Query Table at %4.4X: %2.2X %2.2X %2.2X\n",
- adr,
- map->read8(map,base+(adr*map->buswidth)),
- map->read8(map,base+((adr+1)*map->buswidth)),
- map->read8(map,base+((adr+2)*map->buswidth)));
- }
- else {
- printk(" Extended Query Table version %c.%c\n",
- map->read8(map,base+((adr+3)*map->buswidth)),
- map->read8(map,base+((adr+4)*map->buswidth)));
- }
-}
-
-static int __init cfi_probe_init(void)
-{
- inter_module_register(im_name, THIS_MODULE, &cfi_probe);
- return 0;
-}
-
-static void __exit cfi_probe_exit(void)
-{
- inter_module_unregister(im_name);
-}
-
-module_init(cfi_probe_init);
-module_exit(cfi_probe_exit);
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