+++ /dev/null
-/* $Id: flash.c,v 1.39 2004/04/20 07:57:57 jonashg Exp $
- *
- * Stolen from the eLinux kernel and stripped down.
- *
- * HISTORY:
- *
- * $Log: flash.c,v $
- * Revision 1.39 2004/04/20 07:57:57 jonashg
- * Clear flash_status fields to make it possible to flash several images
- * sequentially.
- *
- * Revision 1.38 2003/12/16 09:04:07 magnusmn
- * Removed FLASHFILL command
- *
- * Revision 1.37 2003/12/16 08:49:01 magnusmn
- * Merging change_branch--fast_flash
- *
- * Revision 1.36.2.6 2003/12/15 17:21:27 magnusmn
- * Reset counter when continuing with operations the next sector.
- *
- * Revision 1.36.2.5 2003/12/15 11:35:57 magnusmn
- * Bail out if we try to erase the same sector more that 10 times
- *
- * Revision 1.36.2.4 2003/12/12 12:07:10 magnusmn
- * FIX for ST M29W320DT
- * Some chip need a reset to bring them back to read mode again.
- *
- * Revision 1.36.2.3 2003/11/10 16:38:04 orjanf
- * Unified Erasing/Writing messages
- *
- * Revision 1.36.2.2 2003/11/10 15:52:34 magnusmn
- * More info on a sector basis
- *
- * Revision 1.36.2.1 2003/11/07 16:23:20 magnusmn
- * o Only erase a flash sector if we need to, that is if the source content isn't already is in place.
- * o Don't erase a flash sector that already contain ones.
- * o Don't write ones to a (d)word that already contain ones.
- * o If there are two flashes, switch flash after an erase operation is started on one of them.
- * o Flash fill doesn't work yet.
- * o No timeout implemented, we will continue to erase/program until we succeed.
- * o Interleave not tested.
- *
- * Revision 1.36 2003/10/16 17:08:51 jonashg
- * Bugfix: reversed CFI-tables wasn't handled correctly since regions support was
- * merged.
- *
- * Revision 1.35 2003/10/14 13:43:41 pkj
- * Fixed compiler warnings.
- *
- * Revision 1.34 2003/10/14 10:48:13 magnusmn
- * No need to write ones to a (d)word where there already are ones. This will save time during flash programming.
- *
- * Revision 1.33 2003/10/10 11:46:25 jonashg
- * Merged change_branch--regions_support.
- *
- * Revision 1.32.2.3 2003/10/10 09:38:13 jonashg
- * Corrected calculation of current region and sector before erase.
- *
- * Revision 1.32.2.2 2003/10/09 16:31:26 jonashg
- * Regions support in JEDEC probe.
- *
- * Revision 1.32.2.1 2003/09/19 15:28:22 jonashg
- * Support for unusual region layouts. It only works for CFI compliant chips (yet).
- *
- * Revision 1.32 2002/12/13 15:55:54 jonashg
- * Fix for ST M29W160ET. It seems to need a reset before erase (even though the
- * probe functions did reset it).
- *
- * Revision 1.31 2002/07/01 14:37:25 pkj
- * Merged with the ASIC version of e100boot. Main difference is that
- * information about the executed commands are sent back to e100boot
- * instead of being sent to the debug port. This means there is no
- * longer any need to use different boot loaders for different
- * debug ports.
- *
- * Revision 1.30 2002/06/26 13:28:29 pkj
- * flash_write() can now be used to erase an area (by specifying
- * source as NULL), and to fill an area with the first udword of
- * source by setting do_fill to TRUE).
- *
- * Revision 1.29 2002/06/26 13:19:37 pkj
- * * flash_write() now returns a status code.
- * * timeout is now decremented correctly in flash_write_part() to
- * actually be able to trigger the timeout message.
- * * Fixed all compiler warnings.
- *
- * Revision 1.28 2002/06/20 12:58:18 pkj
- * Changed svinto_boot.h to e100boot.h
- *
- * Revision 1.27 2002/06/19 14:00:29 pkj
- * * Broke out the probing of the flash chips from flash_write()
- * into flash_probe_chips().
- * * flash_probe_chips() is not limited to two chips or that the
- * first chip exists.
- *
- * Revision 1.26 2002/02/21 14:37:52 jonashg
- * Optimized away my sanity. It's back now I think.
- *
- * Revision 1.25 2002/02/21 14:28:24 jonashg
- * Added support for Atmel AT49?V16?T (had to optimize a bit to make room).
- *
- * Revision 1.24 2002/01/31 14:36:14 jonashg
- * * Added support for Atmel AT49[BL]V16[01] (the chip used in the ETRAX MCM).
- * * Replaced concurrent sector erase with sequential (we have found three
- * different chips that cannot erase multiple sectors at the same time,
- * one of the is the chip in the MCM). I haven't noticed any performance
- * loss on chips (CFI and non-CFI) that can erase all sectors at the same
- * time either (maybe they don't really erase them at the same time in
- * hardware).
- * * Added check for manufacturer id as well as device id (should have been
- * done a long time ago).
- *
- * Revision 1.23 2001/11/21 15:52:44 jonashg
- * Almost readable.
- *
- * Revision 1.22 2001/11/21 15:24:38 jonashg
- * Increased readability and decreased size some 40bytes.
- *
- * Revision 1.21 2001/11/20 13:40:12 starvik
- * Corrected handling for CFI capable bottom boot flashes
- * Shorted some strings to make more space available
- *
- * Revision 1.20 2001/08/08 17:51:28 pkj
- * Made it possible to flash at a start offset other than zero when
- * there are more than one physical flash chip available. Previously
- * it always started flashing from the start of the first flash if
- * there were more than one, even though the start offset was set to
- * something else...
- *
- * Revision 1.19 2001/06/19 14:51:17 jonashg
- * Added support for non-CFI flash Toshiba TC58FVT800.
- *
- * Revision 1.18 2001/04/05 06:32:39 starvik
- * Works with flashes with multiple banks
- *
- * Revision 1.17 2001/03/06 15:21:16 jonashg
- * More output to user.
- *
- * Revision 1.16 2001/03/06 14:11:16 jonashg
- * * Switch to second device correctly when flashing images that extend past the
- * first device.
- * * Only enter autoselect mode once saves a few bytes (not needed before reading
- * device id, since it was done before reading manufacturer id).
- * * A few unnecessary resets removed to save another few bytes.
- *
- * Revision 1.15 2001/02/28 14:52:43 jonashg
- * * Reverted to old sector erase sequence (that was correct).
- * * A bit of executable size optimization (a few hundred bytes).
- * * Cleanup.
- *
- * Revision 1.14 2001/02/27 14:18:59 jonashg
- * * Write full erase command sequence to all sectors that should be erased.
- * * Write 16bit erase command to non-interleaved chips.
- *
- * Revision 1.13 2001/02/23 11:03:41 jonashg
- * Added support for 2 x 16Mb flashes (32-bits buswidth).
- * The CFI probe does not detect two parallel flash devices, but the normal
- * probe does (it should be easy to add that in the CFI-probe, but I didn't
- * have any hardware to try it on and the size of the executable is getting
- * pretty close to the size of the ETRAX cache).
- *
- * Revision 1.12 2001/02/12 13:59:00 jonashg
- * Bugfix: pointer arithmetics made bootsector calculation go wrong.
- *
- * Revision 1.11 2000/11/10 08:02:23 starvik
- * Added CFI support
- *
- * Revision 1.10 2000/10/26 13:47:32 johana
- * Added support for Fujitsu flash 16MBit (2MByte) MBM29LV160BE and MBM29LV160TE.
- * NOT VERIFIED YET!
- *
- * Revision 1.9 2000/06/28 13:02:50 bjornw
- * * Added support for SST39LF800 and SST39LF160 flashes
- * * Fixed some indentation issues
- *
- * Revision 1.8 2000/06/13 11:51:11 starvik
- * Support for two flashes. Second flash is erased and programmed if program
- * is larger than first flash.
- *
- * Revision 1.7 2000/04/13 16:06:15 macce
- * See if flash is empty before erasing it. Might save some production time.
- *
- * Revision 1.6 2000/01/27 17:52:07 bjornw
- * * Added Toshiba flashes
- * * Added proper bootblock erase for the different flashes
- * (this caused the verify errors when trying to do ./flashitall before)
- *
- * Revision 1.5 2000/01/20 11:41:28 finn
- * Improved the verify error printouts in flash_write.
- *
- * Revision 1.4 1999/12/21 19:32:53 bjornw
- * Dont choke on full chip erases even though we dont implement it efficiently.
- *
- * Revision 1.3 1999/11/12 01:30:04 bjornw
- * Added wait for busy to be ready. Removed some warnings.
- *
- * Revision 1.2 1999/10/27 07:42:42 johana
- * Added support for ST M29W800T flash used in 5600
- *
- * Revision 1.1 1999/10/27 01:37:12 bjornw
- * Wrote routines to erase and flash data into a flash ROM.
- *
- */
-
-#include "e100boot.h"
-
-//#define DEBUG
-
-#ifdef DEBUG
-#define FDEBUG(x) x
-#else
-#define FDEBUG(x)
-#endif
-
-/* Try turning of some of these if you run into space problems. */
-#define CFI_PROBE
-#define JEDEC_PROBE
-#define INTERLEAVE
-
-#define TYPE_X16 (16 / 8)
-
-#define nop() __asm__("nop")
-
-#define safe_printk send_string
-
-static char *message_bottom_boot_8 = "8Mb BB";
-static char *message_top_boot_8 = "8Mb TB";
-static char *message_bottom_boot_16 = "16Mb BB";
-static char *message_top_boot_16 = "16Mb TB";
-static char *message_top_boot_32 = "32Mb TB";
-
-enum {
- /* Addresses */
- ADDR_UNLOCK_1 = 0x0555,
- ADDR_UNLOCK_2 = 0x02AA,
- ADDR_MANUFACTURER = 0x0000,
- ADDR_DEVICE_ID = 0x0001,
- ADDR_CFI_QUERY = 0x0055,
-
- /* Commands */
- CMD_UNLOCK_DATA_1 = 0x00AA,
- CMD_UNLOCK_DATA_2 = 0x0055,
- CMD_MANUFACTURER_UNLOCK_DATA = 0x0090,
- CMD_PROGRAM_UNLOCK_DATA = 0x00A0,
- CMD_RESET_DATA = 0x00F0,
- CMD_SECTOR_ERASE_UNLOCK_DATA_1 = 0x0080,
- CMD_SECTOR_ERASE_UNLOCK_DATA_2 = 0x0030,
- CMD_CFI_QUERY_DATA = 0x0098,
-
- /* Offsets */
- OFFSET_CFI_ID = 0x10,
- OFFSET_CFI_SIZE = 0x27,
- OFFSET_CFI_BLOCK_COUNT = 0x2C,
- OFFSET_CFI_BLOCK = 0x2D,
-
- /* Manufacturers */
- MANUFACTURER_AMD = 0x01,
- MANUFACTURER_ATMEL = 0x1F,
- MANUFACTURER_FUJITSU = 0x04,
- MANUFACTURER_SST = 0xBF,
- MANUFACTURER_ST = 0x20,
- MANUFACTURER_TOSHIBA = 0x98,
-
-
- /* To save precious space we store mfr and dev id together */
-
- /* AMD devices */
- AM29F800BB = 0x00012258,
- AM29F800BT = 0x000122D6,
- AM29LV800BB = 0x0001225B,
- AM29LV800BT = 0x000122DA,
- AM29LV160BT = 0x000122C4,
-
- /* Atmel devices */
- AT49xV16x = 0x001F00C0,
- AT49xV16xT = 0x001F00C2,
- AT49BV32xAT = 0x001F00C9,
-
- /* Fujitsu devices */
- MBM29LV160TE = 0x000422C4,
- MBM29LV160BE = 0x00042249,
-
- /* SST devices */
- SST39LF800 = 0x00BF2781,
- SST39LF160 = 0x00BF2782,
-
- /* ST devices */
- M29W800T = 0x002000D7, /* Used in 5600, similar
- * to AM29LV800, but no
- * unlock bypass
- */
- /* Toshiba devices */
- TC58FVT160 = 0x009800C2,
- TC58FVB160 = 0x00980043,
- TC58FVT800 = 0x0098004F,
-
- /* Toggle bit mask */
- D6_MASK = 0x40
-};
-
-struct region {
- unsigned long offset;
- unsigned int sector_size;
- unsigned int numsectors;
-};
-
-#define MAXREGIONS 8
-
-struct chip {
- volatile unsigned char *base;
-#ifdef INTERLEAVE
- byte interleave;
- byte buswidth;
-#endif
- unsigned int size;
- unsigned short numregions;
- struct region regions[MAXREGIONS];
-};
-
-/* Allocate flash structures and initialize base. */
-static struct chip chips[2] = {
- { (unsigned char *)0x80000000,
-#ifdef INTERLEAVE
- 0, 0,
-#endif
- 0, 0, { } },
- { (unsigned char *)0x84000000,
-#ifdef INTERLEAVE
- 0, 0,
-#endif
- 0, 0, { } }
-};
-
-
-
-static unsigned int
-wide_read(struct chip *flash, unsigned long offset)
-{
-#ifdef INTERLEAVE
- switch (flash->buswidth) {
- case 2:
-#endif
- return *((uword *)(flash->base + offset));
-
-#ifdef INTERLEAVE
- case 4:
- return *((udword *)(flash->base + offset));
- }
-
- return 0;
-#endif
-}
-
-static int
-wide_write_chunk(struct chip *flash, unsigned long offset, const void *chunk)
-{
-#ifdef INTERLEAVE
- switch (flash->buswidth) {
- case 2:
-#endif
- *((uword *)(flash->base + offset)) = *((uword *)chunk);
- return 2;
-
-#ifdef INTERLEAVE
- case 4:
- *((udword *)(flash->base + offset)) = *((udword *)chunk);
- return 4;
- }
-
- return 0;
-#endif
-}
-
-static void
-wide_cmd(struct chip *flash, udword cmd, unsigned long offset)
-{
-#ifdef INTERLEAVE
- if (flash->interleave == 1) {
-#endif
- offset <<= 1;
-#ifdef INTERLEAVE
- } else if (flash->interleave == 2) {
- cmd |= (cmd << 16);
- offset <<= 2;
- } else {
- safe_printk("Unsupported interleave!\n");
- return;
- }
-#endif
-
- wide_write_chunk(flash, offset, &cmd);
-}
-
-static void
-flash_unlock(struct chip *flash)
-{
- wide_cmd(flash, CMD_UNLOCK_DATA_1, ADDR_UNLOCK_1);
- wide_cmd(flash, CMD_UNLOCK_DATA_2, ADDR_UNLOCK_2);
-}
-
-static int
-flash_is_busy(struct chip *flash, unsigned long offset)
-{
-#ifdef INTERLEAVE
- if (flash->interleave == 2) {
- udword read1, read2;
-
- read1 = wide_read(flash, offset);
- read2 = wide_read(flash, offset);
- return (((read1 >> 16) & D6_MASK) !=
- ((read2 >> 16) & D6_MASK)) ||
- (((read1 & 0xffff) & D6_MASK) !=
- ((read2 & 0xffff) & D6_MASK));
- }
-#endif
-
- return ((wide_read(flash, offset) & D6_MASK) !=
- (wide_read(flash, offset) & D6_MASK));
-}
-
-
-
-#ifdef CFI_PROBE
-static int
-try_cfi(struct chip *flash)
-{
- int offset_shift = 1;
-
-#ifdef INTERLEAVE
- if (flash->interleave == 2) {
- offset_shift = 2;
- }
-#endif
-
- /* Enter CFI mode */
- wide_cmd(flash, CMD_CFI_QUERY_DATA, ADDR_CFI_QUERY);
-
- /* Check if flash responds correctly */
- if ((byte)wide_read(flash, (OFFSET_CFI_ID+0) << offset_shift) == 'Q' &&
- (byte)wide_read(flash, (OFFSET_CFI_ID+1) << offset_shift) == 'R' &&
- (byte)wide_read(flash, (OFFSET_CFI_ID+2) << offset_shift) == 'Y') {
- int block; /* Current block */
- int block_count; /* Number of blocks */
- unsigned int offset = 0; /* Offset into flash */
- int reverse = 0; /* Reverse block table */
- int primary; /* Offset to vendor specific table */
-
- safe_printk("Found 1 x CFI at ");
- send_hex((udword)flash->base, NL);
-
- flash->size =
- 1 << wide_read(flash, OFFSET_CFI_SIZE << offset_shift);
-
- /* CFI stores flash organization in blocks. Each block contains
- * a number of sectors with the same size
- */
- block_count = wide_read(flash, OFFSET_CFI_BLOCK_COUNT <<
- offset_shift);
-
- /* Check if table is reversed */
- primary = wide_read(flash, (OFFSET_CFI_ID+5) << offset_shift);
- /* For CFI version 1.0 we don't know. Assume that id & 0x80 */
- /* indicates top boot */
- if ((byte)wide_read(flash, (primary+4) << offset_shift) == 0x30)
- {
- /* read device id */
- wide_cmd(flash, CMD_RESET_DATA, ADDR_UNLOCK_1);
- flash_unlock(flash);
- wide_cmd(flash, CMD_MANUFACTURER_UNLOCK_DATA,
- ADDR_UNLOCK_1);
- reverse = wide_read(flash, ADDR_DEVICE_ID * TYPE_X16
-#ifdef INTERLEAVE
- * flash->interleave
-#endif
- ) & 0x80;
- wide_cmd(flash, CMD_CFI_QUERY_DATA, ADDR_CFI_QUERY);
- } else {
- reverse = ((byte)wide_read(flash,
- (primary+15) << offset_shift) == 3);
- }
-
- flash->numregions = block_count;
- if (block_count > MAXREGIONS) {
- safe_printk("Too many regions on chip!\n");
- return 0;
- }
-
- /* Blocks are stored backwards compared to flash organization */
- for (block = reverse ? block_count - 1 : 0;
- reverse ? block >= 0 : block < block_count;
- reverse ? block-- : block++) {
- int region;
-
- /* Size of each sector in block. Size is stored as
- * sector_size / 256.
- */
- int sector_size =
- (wide_read(flash, (OFFSET_CFI_BLOCK+block * 4+2) <<
- offset_shift)
- |
- (wide_read(flash, (OFFSET_CFI_BLOCK+block * 4+3) <<
- offset_shift) << 8)
- ) << 8;
-
- /* Number of sectors */
- int sector_count =
- (wide_read(flash, (OFFSET_CFI_BLOCK+block * 4+0) <<
- offset_shift)
- |
- (wide_read(flash, (OFFSET_CFI_BLOCK+block * 4+1) <<
- offset_shift) << 8)
- ) + 1;
-
- region = reverse? block_count - 1 - block : block;
- flash->regions[region].offset = offset;
- flash->regions[region].sector_size = sector_size;
- flash->regions[region].numsectors = sector_count;
-
- /* Can't use multiplication (we have no lib). */
- {
- int temp;
- for (temp = 0 ; temp < sector_count ; temp++) {
- offset += sector_size;
- }
- }
-
-FDEBUG(
- if (reverse) {
- safe_printk("NOTE! reversed table:\n");
- }
- safe_printk("region: ");
- send_hex((udword)region, NL);
- safe_printk(" offset: ");
- send_hex((udword)flash->regions[region].offset, NL);
- safe_printk(" sector_size: ");
- send_hex((udword)flash->regions[region].sector_size, NL);
- safe_printk(" numsectors: ");
- send_hex((udword)flash->regions[region].numsectors, NL);
-)
-
- /* Some flashes (SST) store information about alternate
- * block sizes. Ignore those by breaking when the sum
- * of the sector sizes == flash size.
- */
- if (offset == flash->size) {
- break;
- }
- }
-
- /* reset */
- wide_cmd(flash, CMD_RESET_DATA, ADDR_UNLOCK_1);
-
- return 1;
- }
-
- /* reset */
- wide_cmd(flash, CMD_RESET_DATA, ADDR_UNLOCK_1);
-
- return 0;
-}
-#endif
-
-
-
-static int
-flash_probe(struct chip *flash)
-{
- char *message;
- udword dev_id;
- udword mfr_id;
- udword id;
-
- if (flash->size
-#ifdef CFI_PROBE
- || try_cfi(flash)
-#endif
- ) {
- return 1;
- }
-
-#ifdef JEDEC_PROBE
- /* Read manufacturer ID. */
- flash_unlock(flash);
- wide_cmd(flash, CMD_MANUFACTURER_UNLOCK_DATA, ADDR_UNLOCK_1);
- mfr_id = wide_read(flash, ADDR_MANUFACTURER * TYPE_X16
-#ifdef INTERLEAVE
- * flash->interleave
-#endif
- );
- /* Read device ID. */
- dev_id = wide_read(flash, ADDR_DEVICE_ID * TYPE_X16
-#ifdef INTERLEAVE
- * flash->interleave
-#endif
- );
-FDEBUG(
- safe_printk("mfr_id: ");
- send_hex(mfr_id, NL);
- safe_printk("dev_id: ");
- send_hex(dev_id, NL);
-)
-
-#ifdef INTERLEAVE
- if ((flash->interleave == 2) &&
- ((mfr_id >> 16) == (mfr_id & 0xffff)) &&
- ((dev_id >> 16) == (dev_id & 0xffff))) {
- mfr_id &= 0xffff;
- dev_id &= 0xffff;
- }
-#endif
-
- id = (mfr_id << 16) | dev_id;
-
- /* reset */
- wide_cmd(flash, CMD_RESET_DATA, ADDR_UNLOCK_1);
-
- /* Check device type and fill in correct sizes. */
- switch (id) {
- case AM29LV160BT:
- case TC58FVT160:
- // case MBM29LV160TE: /* This is same id as AM29LV160BT */
- message = message_top_boot_16;
-
- flash->size = 0x00200000;
-
- flash->regions[0].offset = 0x00000000;
- flash->regions[0].sector_size = 0x10000;
- flash->regions[0].numsectors = 31;
-
- flash->regions[1].offset = 0x001F0000;
- flash->regions[1].sector_size = 0x08000;
- flash->regions[1].numsectors = 1;
-
- flash->regions[2].offset = 0x001F8000;
- flash->regions[2].sector_size = 0x02000;
- flash->regions[2].numsectors = 2;
-
- flash->regions[3].offset = 0x001FC000;
- flash->regions[3].sector_size = 0x04000;
- flash->regions[3].numsectors = 1;
- break;
-
- // case AM29LV160BB:
- case TC58FVB160:
- case MBM29LV160BE:
- message = message_bottom_boot_16;
-
- flash->size = 0x00200000;
-
- flash->regions[0].offset = 0x00000000;
- flash->regions[0].sector_size = 0x04000;
- flash->regions[0].numsectors = 1;
-
- flash->regions[1].offset = 0x00004000;
- flash->regions[1].sector_size = 0x02000;
- flash->regions[1].numsectors = 2;
-
- flash->regions[2].offset = 0x00008000;
- flash->regions[2].sector_size = 0x08000;
- flash->regions[2].numsectors = 1;
-
- flash->regions[3].offset = 0x00010000;
- flash->regions[3].sector_size = 0x10000;
- flash->regions[3].numsectors = 31;
- break;
-
- case AM29LV800BB:
- case AM29F800BB:
- message = message_bottom_boot_8;
-
- flash->size = 0x00100000;
-
- flash->regions[0].offset = 0x00000000;
- flash->regions[0].sector_size = 0x04000;
- flash->regions[0].numsectors = 1;
-
- flash->regions[1].offset = 0x00004000;
- flash->regions[1].sector_size = 0x02000;
- flash->regions[1].numsectors = 2;
-
- flash->regions[2].offset = 0x00008000;
- flash->regions[2].sector_size = 0x08000;
- flash->regions[2].numsectors = 1;
-
- flash->regions[3].offset = 0x00010000;
- flash->regions[3].sector_size = 0x10000;
- flash->regions[3].numsectors = 15;
- break;
-
- case M29W800T:
- case AM29LV800BT:
- case AM29F800BT:
- case TC58FVT800:
- message = message_top_boot_8;
-
- flash->size = 0x00100000;
-
- flash->regions[0].offset = 0x00000000;
- flash->regions[0].sector_size = 0x10000;
- flash->regions[0].numsectors = 15;
-
- flash->regions[1].offset = 0x000F0000;
- flash->regions[1].sector_size = 0x08000;
- flash->regions[1].numsectors = 1;
-
- flash->regions[2].offset = 0x000F8000;
- flash->regions[2].sector_size = 0x02000;
- flash->regions[2].numsectors = 2;
-
- flash->regions[3].offset = 0x000FC000;
- flash->regions[3].sector_size = 0x04000;
- flash->regions[3].numsectors = 1;
-
- break;
-
- case AT49xV16x:
- message = message_bottom_boot_16;
-
- flash->size = 0x00200000;
-
- flash->regions[0].offset = 0x00000000;
- flash->regions[0].sector_size = 0x02000;
- flash->regions[0].numsectors = 8;
-
- flash->regions[1].offset = 0x00010000;
- flash->regions[1].sector_size = 0x10000;
- flash->regions[1].numsectors = 31;
-
- break;
-
- case AT49xV16xT:
- message = message_top_boot_16;
-
- flash->size = 0x00200000;
-
- flash->regions[0].offset = 0x00000000;
- flash->regions[0].sector_size = 0x10000;
- flash->regions[0].numsectors = 31;
-
- flash->regions[1].offset = 0x001F0000;
- flash->regions[1].sector_size = 0x02000;
- flash->regions[1].numsectors = 8;
-
- break;
-
- case AT49BV32xAT:
- message = message_top_boot_32;
-
- flash->size = 0x00400000;
-
- flash->regions[0].offset = 0x00000000;
- flash->regions[0].sector_size = 0x10000;
- flash->regions[0].numsectors = 63;
-
- flash->regions[1].offset = 0x001F0000;
- flash->regions[1].sector_size = 0x02000;
- flash->regions[1].numsectors = 8;
-
- break;
-
- default:
-#endif
-#ifdef INTERLEAVE
- if (flash->interleave == 1) {
-#endif
- safe_printk("No single x16 at ");
-#ifdef INTERLEAVE
- } else {
- safe_printk("No interleaved x16 at ");
- }
-#endif
- send_hex((udword)flash->base, NL);
-
- return 0;
-#ifdef JEDEC_PROBE
- }
-
- safe_printk("Found ");
-#ifdef INTERLEAVE
- if (flash->interleave == 1) {
-#endif
- safe_printk("1");
-#ifdef INTERLEAVE
- }
- if (flash->interleave == 2) {
- int count = 0;
-
- flash->size <<= 1;
- while (count < MAXREGIONS) {
- flash->regions[count].offset <<= 1;
- flash->regions[count].sector_size <<= 1;
- count++;
- }
- safe_printk("2");
- }
-#endif
- safe_printk(" x ");
- safe_printk(message);
- safe_printk(" at ");
- send_hex((udword)flash->base, NL);
-
- return 1;
-#endif
-}
-
-/* Start erase of a sector but do no wait for completion */
-static void
-start_sector_erase(struct chip *flash, unsigned long offset)
-{
- flash_unlock(flash);
- wide_cmd(flash, CMD_SECTOR_ERASE_UNLOCK_DATA_1, ADDR_UNLOCK_1);
- flash_unlock(flash);
-
-#ifdef INTERLEAVE
- if (flash->interleave == 2) {
- *(udword *)(flash->base+offset) = (CMD_SECTOR_ERASE_UNLOCK_DATA_2 << 16) |
- CMD_SECTOR_ERASE_UNLOCK_DATA_2;
- } else {
-#endif
- *(uword *)(flash->base+offset) = CMD_SECTOR_ERASE_UNLOCK_DATA_2;
-#ifdef INTERLEAVE
- }
-#endif
-}
-
-/* Return the size of the sector at the given offset */
-static int
-find_sector_size(struct chip *flash, unsigned long offset)
-{
- unsigned int i, j;
- int region_size;
- /* Sanity check */
- if (offset >= flash->size)
- return 0;
-
- for(i=0; i < MAXREGIONS; i++)
- if (offset >= flash->regions[i].offset) {
- region_size=0;
- for (j=0; j < flash->regions[i].numsectors; j++)
- region_size += flash->regions[i].sector_size;
- if (offset < flash->regions[i].offset + region_size)
- return flash->regions[i].sector_size;
- }
-
- /* Should not happen */
- return 0;
-}
-
-/* Check and see if we need to erase the sector */
-/* The return values mean */
-/* 0: The source and destination are the same. */
-/* 1: The source and destination are not the same, but flash sector already contains only ones. */
-/* 2: The source and destination are not the same and the flash sector is tainted by some zeroes. */
-static char
-need_to_erase(struct chip *flash, unsigned long offset, const unsigned char *source, int size)
-{
- int i;
- unsigned long j;
-
- for (i = 0; i < size; i+=2)
- if (*(uword*)(flash->base + i + offset) != *(uword*)(source + i)) {
- /* Check if the sector only contain zeroes */
- for (j = offset; j < (size + offset); j+=2) {
- if (*(uword*)(flash->base + j) != 0xffff)
- return 2;
- }
- return 1;
- }
-
- /* The source is equal to the destination */
- return 0;
-}
-
-static unsigned int
-flash_probe_chips(void)
-{
- unsigned int tot_size = 0;
- unsigned int i = 0;
-
- for (; i < sizeof chips/sizeof *chips; i++) {
-#ifdef INTERLEAVE
- byte interleave;
-
- for (interleave = 1; interleave < 4; interleave *= 2) {
- chips[i].interleave = interleave;
- if (interleave == 1) {
- chips[i].buswidth = sizeof(uword);
- } else {
- chips[i].buswidth = sizeof(udword);
- }
-
- if (flash_probe(&chips[i])) {
- break;
- }
- }
-#else
- flash_probe(&chips[i]);
-#endif
-
- tot_size += chips[i].size;
- }
-
- return tot_size;
-}
-
-/* Program a sector (given by size) at the given offset. Do not write only ones. */
-static void
-program_sector(struct chip *flash, unsigned long offset, const unsigned char *source, int size)
-{
- int chunk_size = 0;
- int bytes_written = 0;
-
-
- while (bytes_written < size) {
- if (
-#ifdef INTERLEAVE
- (flash->buswidth == 2) &&
-#endif
- *(uword*)(source + bytes_written) == 0xffff) {
- chunk_size=2;
- }
-#ifdef INTERLEAVE
- else if ((flash->buswidth == 4) && *(udword*)(source + bytes_written) == 0xffffffff) {
- chunk_size=4;
- }
-#endif
- else {
- flash_unlock(flash);
- wide_cmd(flash, CMD_PROGRAM_UNLOCK_DATA, ADDR_UNLOCK_1);
- chunk_size = wide_write_chunk(flash, offset + bytes_written, source + bytes_written);
- while(flash_is_busy(flash, offset + bytes_written))
- /* Nothing */
- ;
- }
-
- bytes_written += chunk_size;
- }
-}
-
-int
-flash_write(const unsigned char *source, unsigned int offset, unsigned int size)
-{
- struct flash_status {
- unsigned char busy; /* Indicates if the flash is busy */
- const unsigned char *src; /* From where to get the source info */
- unsigned long offset; /* Start operations in flash at this offset */
- unsigned int size; /* Size to erase/program (if needed) */
- unsigned int bytes_done; /* Bytes written (if needed) */
- unsigned int erase_attempts; /* Keep track how many times we try to erase the same sector */
- };
-
- unsigned int tot_size = flash_probe_chips();
- unsigned int i, j;
- unsigned int current_sector_size;
- unsigned long current_offset;
- const unsigned char *current_src;
- char need_erase;
- struct flash_status *current_flash = NULL;
-
- static struct flash_status flash_status[2] = {
- { 0, NULL, 0, 0, 0, 0 },
- { 0, NULL, 0, 0, 0, 0 }
- };
-
- if (!tot_size) {
- /* No chips found, bail out. */
- return ERR_FLASH_NONE;
- }
-
- if (offset + size > tot_size) {
- safe_printk("Fatal: flash is too small.\n");
- return ERR_FLASH_TOO_SMALL;
- }
-
- /* Initiate the flash_status structs so that we can keep track of what needs to be done
- on the different flash chips */
-
- /* Operations only on flash chip 1 */
- if (offset >= (&chips[0])->size) {
- flash_status[0].size = 0;
- flash_status[1].src = source;
- flash_status[1].offset = offset - (&chips[0])->size;
- flash_status[1].size = size;
- }
- /* Operations on both flash chips */
- else if ((offset < (&chips[0])->size) && ((offset+size) > (&chips[0])->size)) {
- flash_status[0].src = source;
- flash_status[0].offset = offset;
- flash_status[0].size = (&chips[0])->size - offset;
- flash_status[1].src = source + flash_status[0].size;
- flash_status[1].offset = 0;
- flash_status[1].size = size - flash_status[0].size;
- }
- /* Operations only on flash chip 0 */
- else {
- flash_status[0].src = source;
- flash_status[0].offset = offset;
- flash_status[0].size = size;
- flash_status[1].size = 0;
- }
- flash_status[0].busy = 0;
- flash_status[0].bytes_done = 0;
- flash_status[0].erase_attempts = 0;
- flash_status[1].busy = 0;
- flash_status[1].bytes_done = 0;
- flash_status[1].erase_attempts = 0;
-#if 0
- for (i = 0; i < 2; i++) {
- safe_printk("\nFlash ");
- send_hex(i, NL);
- safe_printk("src:\t");
- send_hex((int)flash_status[i].src, NL);
- safe_printk("offset:\t");
- send_hex(flash_status[i].offset, NL);
- safe_printk("size:\t");
- send_hex(flash_status[i].size, NL);
- safe_printk("\n");
- }
-#endif
-
- /* Erase and write */
-
- i = 0; /* Start operations on flash 0 */
-
-#define CHANGE_FLASH
-
- while (((&flash_status[0])->bytes_done + (&flash_status[1])->bytes_done) < size) {
-
- struct flash_status *previous_flash = &flash_status[i ? 0 : 1];
- current_flash = &flash_status[i];
-
-#ifdef CHANGE_FLASH
- /* Change flash only if:
- - There is a flash to change to and operations should be made on that flash *AND*
- - There is more to write to the previous flash *AND*
- - Operations should be made on the current flash *OR*
- - The current flash is busy *OR*
- - All has been written to the current flash */
-
- if (previous_flash->size && (previous_flash->bytes_done < previous_flash->size) &&
- (!current_flash->size || current_flash->busy ||
- current_flash->bytes_done == current_flash->size))
- i = i ? 0 : 1; /* Change flash chip */
-#else
- /* Finish one flash chip before continuing on the next one */
-
- if ((&flash_status[i])->bytes_done == (&flash_status[i])->size)
- i = i ? 0 : 1; /* Change flash chip */
-#endif
- /* Bail out if we have tried to erase the same sector more that 10 times. */
- if(current_flash->erase_attempts > 10) {
- safe_printk("Sector erase error\n");
- return ERR_FLASH_ERASE;
- }
-
- /* Get the current status from the chip we are about to access */
- current_flash = &flash_status[i];
- current_offset = current_flash->offset + current_flash->bytes_done;
- current_src = current_flash->src + current_flash->bytes_done;
- current_sector_size = find_sector_size(&chips[i], current_offset);
-
- /* Make sure that the chip we are about to access has finished erasing */
- if (current_flash->busy) {
- while (flash_is_busy(&chips[i], current_offset))
- /* nothing */
- ;
- current_flash->busy = 0;
- }
-
- /* Some flash chip need a reset to bring them back to read mode again. */
- wide_cmd(&chips[i], CMD_RESET_DATA, ADDR_UNLOCK_1);
-
- /* Find out if we need to erase the sector or not */
- need_erase = need_to_erase(&chips[i], current_offset, current_src, current_sector_size);
-
- if (need_erase == 0) {
- current_flash->bytes_done += current_sector_size;
- current_flash->erase_attempts = 0;
- send_hex((int)(&chips[i])->base + current_offset, 0);
- safe_printk(": No need to write\n");
- continue;
- } else if (need_erase == 1) {
- /* Erased, not worth printing. */
- }
- else if (need_erase == 2) {
- send_hex((int)(&chips[i])->base + current_offset, 0);
- safe_printk(": Erasing ");
- send_hex(current_sector_size, 0);
- safe_printk(" bytes\n");
- start_sector_erase(&chips[i], current_offset);
- current_flash->busy=1;
- current_flash->erase_attempts++;
- continue;
- }
-
- /* The sector is ready to be programmed */
- send_hex((int)(&chips[i])->base + current_offset, 0);
- safe_printk(": Writing ");
- send_hex(current_sector_size, 0);
- safe_printk(" bytes\n");
- program_sector(&chips[i], current_offset, current_src, current_sector_size);
- current_flash->bytes_done += current_sector_size;
- current_flash->erase_attempts = 0;
- }
-
- /* Verify that the flash chip(s) have the correct content */
- for (i = 0; i < 2; i++) {
- current_flash = &flash_status[i];
- if (!current_flash->size)
- continue;
- send_hex((int)(&chips[i])->base, 0);
- safe_printk(": Verifying...");
- for (j = 0; j < current_flash->size; j+=2) {
- if (*(uword*)(current_flash->offset + j + (&chips[i])->base) !=
- *(uword*)(current_flash->src + j)) {
- safe_printk("Error at ");
- send_hex(j, NL);
- return ERR_FLASH_VERIFY;
- }
- }
- safe_printk("OK\n");
- }
-
- return ERR_FLASH_OK;
-}
projects / openwrt / svn-archive / archive.git / blobdiff