diff options
Diffstat (limited to 'package/etrax-tools/src/e100boot/cbl/src/flash.c')
| -rw-r--r-- | package/etrax-tools/src/e100boot/cbl/src/flash.c | 1125 |
1 files changed, 1125 insertions, 0 deletions
diff --git a/package/etrax-tools/src/e100boot/cbl/src/flash.c b/package/etrax-tools/src/e100boot/cbl/src/flash.c new file mode 100644 index 000000000..892e98ad7 --- /dev/null +++ b/package/etrax-tools/src/e100boot/cbl/src/flash.c @@ -0,0 +1,1125 @@ +/* $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; +} |