diff options
Diffstat (limited to 'common/cmd_doc.c')
| -rw-r--r-- | common/cmd_doc.c | 1644 |
1 files changed, 0 insertions, 1644 deletions
diff --git a/common/cmd_doc.c b/common/cmd_doc.c deleted file mode 100644 index 5cc90f064d..0000000000 --- a/common/cmd_doc.c +++ /dev/null @@ -1,1644 +0,0 @@ -/* - * Driver for Disk-On-Chip 2000 and Millennium - * (c) 1999 Machine Vision Holdings, Inc. - * (c) 1999, 2000 David Woodhouse <dwmw2@infradead.org> - * - * $Id: doc2000.c,v 1.46 2001/10/02 15:05:13 dwmw2 Exp $ - */ - -#include <common.h> -#include <config.h> -#include <command.h> -#include <malloc.h> -#include <asm/io.h> -#include <linux/mtd/nftl.h> -#include <linux/mtd/doc2000.h> - -#error This code is broken and will be removed outright in the next release. -#error If you need diskonchip support, please update the Linux driver in -#error drivers/mtd/nand/diskonchip.c to work with u-boot. - -/* - * ! BROKEN ! - * - * TODO: must be implemented and tested by someone with HW - */ -#if 0 -#ifdef CONFIG_SYS_DOC_SUPPORT_2000 -#define DoC_is_2000(doc) (doc->ChipID == DOC_ChipID_Doc2k) -#else -#define DoC_is_2000(doc) (0) -#endif - -#ifdef CONFIG_SYS_DOC_SUPPORT_MILLENNIUM -#define DoC_is_Millennium(doc) (doc->ChipID == DOC_ChipID_DocMil) -#else -#define DoC_is_Millennium(doc) (0) -#endif - -/* CONFIG_SYS_DOC_PASSIVE_PROBE: - In order to ensure that the BIOS checksum is correct at boot time, and - hence that the onboard BIOS extension gets executed, the DiskOnChip - goes into reset mode when it is read sequentially: all registers - return 0xff until the chip is woken up again by writing to the - DOCControl register. - - Unfortunately, this means that the probe for the DiskOnChip is unsafe, - because one of the first things it does is write to where it thinks - the DOCControl register should be - which may well be shared memory - for another device. I've had machines which lock up when this is - attempted. Hence the possibility to do a passive probe, which will fail - to detect a chip in reset mode, but is at least guaranteed not to lock - the machine. - - If you have this problem, uncomment the following line: -#define CONFIG_SYS_DOC_PASSIVE_PROBE -*/ - -#undef DOC_DEBUG -#undef ECC_DEBUG -#undef PSYCHO_DEBUG -#undef NFTL_DEBUG - -static struct DiskOnChip doc_dev_desc[CONFIG_SYS_MAX_DOC_DEVICE]; - -/* Current DOC Device */ -static int curr_device = -1; - -/* Supported NAND flash devices */ -static struct nand_flash_dev nand_flash_ids[] = { - {"Toshiba TC5816BDC", NAND_MFR_TOSHIBA, 0x64, 21, 1, 2, 0x1000, 0}, - {"Toshiba TC5832DC", NAND_MFR_TOSHIBA, 0x6b, 22, 0, 2, 0x2000, 0}, - {"Toshiba TH58V128DC", NAND_MFR_TOSHIBA, 0x73, 24, 0, 2, 0x4000, 0}, - {"Toshiba TC58256FT/DC", NAND_MFR_TOSHIBA, 0x75, 25, 0, 2, 0x4000, 0}, - {"Toshiba TH58512FT", NAND_MFR_TOSHIBA, 0x76, 26, 0, 3, 0x4000, 0}, - {"Toshiba TC58V32DC", NAND_MFR_TOSHIBA, 0xe5, 22, 0, 2, 0x2000, 0}, - {"Toshiba TC58V64AFT/DC", NAND_MFR_TOSHIBA, 0xe6, 23, 0, 2, 0x2000, 0}, - {"Toshiba TC58V16BDC", NAND_MFR_TOSHIBA, 0xea, 21, 1, 2, 0x1000, 0}, - {"Toshiba TH58100FT", NAND_MFR_TOSHIBA, 0x79, 27, 0, 3, 0x4000, 0}, - {"Samsung KM29N16000", NAND_MFR_SAMSUNG, 0x64, 21, 1, 2, 0x1000, 0}, - {"Samsung unknown 4Mb", NAND_MFR_SAMSUNG, 0x6b, 22, 0, 2, 0x2000, 0}, - {"Samsung KM29U128T", NAND_MFR_SAMSUNG, 0x73, 24, 0, 2, 0x4000, 0}, - {"Samsung KM29U256T", NAND_MFR_SAMSUNG, 0x75, 25, 0, 2, 0x4000, 0}, - {"Samsung unknown 64Mb", NAND_MFR_SAMSUNG, 0x76, 26, 0, 3, 0x4000, 0}, - {"Samsung KM29W32000", NAND_MFR_SAMSUNG, 0xe3, 22, 0, 2, 0x2000, 0}, - {"Samsung unknown 4Mb", NAND_MFR_SAMSUNG, 0xe5, 22, 0, 2, 0x2000, 0}, - {"Samsung KM29U64000", NAND_MFR_SAMSUNG, 0xe6, 23, 0, 2, 0x2000, 0}, - {"Samsung KM29W16000", NAND_MFR_SAMSUNG, 0xea, 21, 1, 2, 0x1000, 0}, - {"Samsung K9F5616Q0C", NAND_MFR_SAMSUNG, 0x45, 25, 0, 2, 0x4000, 1}, - {"Samsung K9K1216Q0C", NAND_MFR_SAMSUNG, 0x46, 26, 0, 3, 0x4000, 1}, - {"Samsung K9F1G08U0M", NAND_MFR_SAMSUNG, 0xf1, 27, 0, 2, 0, 0}, - {NULL,} -}; - -/* ------------------------------------------------------------------------- */ - -int do_doc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) -{ - int rcode = 0; - - switch (argc) { - case 0: - case 1: - cmd_usage(cmdtp); - return 1; - case 2: - if (strcmp(argv[1],"info") == 0) { - int i; - - putc ('\n'); - - for (i=0; i<CONFIG_SYS_MAX_DOC_DEVICE; ++i) { - if(doc_dev_desc[i].ChipID == DOC_ChipID_UNKNOWN) - continue; /* list only known devices */ - printf ("Device %d: ", i); - doc_print(&doc_dev_desc[i]); - } - return 0; - - } else if (strcmp(argv[1],"device") == 0) { - if ((curr_device < 0) || (curr_device >= CONFIG_SYS_MAX_DOC_DEVICE)) { - puts ("\nno devices available\n"); - return 1; - } - printf ("\nDevice %d: ", curr_device); - doc_print(&doc_dev_desc[curr_device]); - return 0; - } - cmd_usage(cmdtp); - return 1; - case 3: - if (strcmp(argv[1],"device") == 0) { - int dev = (int)simple_strtoul(argv[2], NULL, 10); - - printf ("\nDevice %d: ", dev); - if (dev >= CONFIG_SYS_MAX_DOC_DEVICE) { - puts ("unknown device\n"); - return 1; - } - doc_print(&doc_dev_desc[dev]); - /*doc_print (dev);*/ - - if (doc_dev_desc[dev].ChipID == DOC_ChipID_UNKNOWN) { - return 1; - } - - curr_device = dev; - - puts ("... is now current device\n"); - - return 0; - } - - cmd_usage(cmdtp); - return 1; - default: - /* at least 4 args */ - - if (strcmp(argv[1],"read") == 0 || strcmp(argv[1],"write") == 0) { - ulong addr = simple_strtoul(argv[2], NULL, 16); - ulong off = simple_strtoul(argv[3], NULL, 16); - ulong size = simple_strtoul(argv[4], NULL, 16); - int cmd = (strcmp(argv[1],"read") == 0); - int ret, total; - - printf ("\nDOC %s: device %d offset %ld, size %ld ... ", - cmd ? "read" : "write", curr_device, off, size); - - ret = doc_rw(doc_dev_desc + curr_device, cmd, off, size, - (size_t *)&total, (u_char*)addr); - - printf ("%d bytes %s: %s\n", total, cmd ? "read" : "write", - ret ? "ERROR" : "OK"); - - return ret; - } else if (strcmp(argv[1],"erase") == 0) { - ulong off = simple_strtoul(argv[2], NULL, 16); - ulong size = simple_strtoul(argv[3], NULL, 16); - int ret; - - printf ("\nDOC erase: device %d offset %ld, size %ld ... ", - curr_device, off, size); - - ret = doc_erase (doc_dev_desc + curr_device, off, size); - - printf("%s\n", ret ? "ERROR" : "OK"); - - return ret; - } else { - cmd_usage(cmdtp); - rcode = 1; - } - - return rcode; - } -} -U_BOOT_CMD( - doc, 5, 1, do_doc, - "Disk-On-Chip sub-system", - "info - show available DOC devices\n" - "doc device [dev] - show or set current device\n" - "doc read addr off size\n" - "doc write addr off size - read/write `size'" - " bytes starting at offset `off'\n" - " to/from memory address `addr'\n" - "doc erase off size - erase `size' bytes of DOC from offset `off'" -); - -int do_docboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) -{ - char *boot_device = NULL; - char *ep; - int dev; - ulong cnt; - ulong addr; - ulong offset = 0; - image_header_t *hdr; - int rcode = 0; -#if defined(CONFIG_FIT) - const void *fit_hdr = NULL; -#endif - - show_boot_progress (34); - switch (argc) { - case 1: - addr = CONFIG_SYS_LOAD_ADDR; - boot_device = getenv ("bootdevice"); - break; - case 2: - addr = simple_strtoul(argv[1], NULL, 16); - boot_device = getenv ("bootdevice"); - break; - case 3: - addr = simple_strtoul(argv[1], NULL, 16); - boot_device = argv[2]; - break; - case 4: - addr = simple_strtoul(argv[1], NULL, 16); - boot_device = argv[2]; - offset = simple_strtoul(argv[3], NULL, 16); - break; - default: - cmd_usage(cmdtp); - show_boot_progress (-35); - return 1; - } - - show_boot_progress (35); - if (!boot_device) { - puts ("\n** No boot device **\n"); - show_boot_progress (-36); - return 1; - } - show_boot_progress (36); - - dev = simple_strtoul(boot_device, &ep, 16); - - if ((dev >= CONFIG_SYS_MAX_DOC_DEVICE) || - (doc_dev_desc[dev].ChipID == DOC_ChipID_UNKNOWN)) { - printf ("\n** Device %d not available\n", dev); - show_boot_progress (-37); - return 1; - } - show_boot_progress (37); - - printf ("\nLoading from device %d: %s at 0x%lX (offset 0x%lX)\n", - dev, doc_dev_desc[dev].name, doc_dev_desc[dev].physadr, - offset); - - if (doc_rw (doc_dev_desc + dev, 1, offset, - SECTORSIZE, NULL, (u_char *)addr)) { - printf ("** Read error on %d\n", dev); - show_boot_progress (-38); - return 1; - } - show_boot_progress (38); - - switch (genimg_get_format ((void *)addr)) { - case IMAGE_FORMAT_LEGACY: - hdr = (image_header_t *)addr; - - image_print_contents (hdr); - - cnt = image_get_image_size (hdr); - break; -#if defined(CONFIG_FIT) - case IMAGE_FORMAT_FIT: - fit_hdr = (const void *)addr; - puts ("Fit image detected...\n"); - - cnt = fit_get_size (fit_hdr); - break; -#endif - default: - show_boot_progress (-39); - puts ("** Unknown image type\n"); - return 1; - } - show_boot_progress (39); - - cnt -= SECTORSIZE; - if (doc_rw (doc_dev_desc + dev, 1, offset + SECTORSIZE, cnt, - NULL, (u_char *)(addr+SECTORSIZE))) { - printf ("** Read error on %d\n", dev); - show_boot_progress (-40); - return 1; - } - show_boot_progress (40); - -#if defined(CONFIG_FIT) - /* This cannot be done earlier, we need complete FIT image in RAM first */ - if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) { - if (!fit_check_format (fit_hdr)) { - show_boot_progress (-130); - puts ("** Bad FIT image format\n"); - return 1; - } - show_boot_progress (131); - fit_print_contents (fit_hdr); - } -#endif - - /* Loading ok, update default load address */ - - load_addr = addr; - - /* Check if we should attempt an auto-start */ - if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) { - char *local_args[2]; - extern int do_bootm (cmd_tbl_t *, int, int, char *[]); - - local_args[0] = argv[0]; - local_args[1] = NULL; - - printf ("Automatic boot of image at addr 0x%08lX ...\n", addr); - - do_bootm (cmdtp, 0, 1, local_args); - rcode = 1; - } - return rcode; -} - -U_BOOT_CMD( - docboot, 4, 1, do_docboot, - "boot from DOC device", - "loadAddr dev" -); - -int doc_rw (struct DiskOnChip* this, int cmd, - loff_t from, size_t len, - size_t * retlen, u_char * buf) -{ - int noecc, ret = 0, n, total = 0; - char eccbuf[6]; - - while(len) { - /* The ECC will not be calculated correctly if - less than 512 is written or read */ - noecc = (from != (from | 0x1ff) + 1) || (len < 0x200); - - if (cmd) - ret = doc_read_ecc(this, from, len, - (size_t *)&n, (u_char*)buf, - noecc ? (uchar *)NULL : (uchar *)eccbuf); - else - ret = doc_write_ecc(this, from, len, - (size_t *)&n, (u_char*)buf, - noecc ? (uchar *)NULL : (uchar *)eccbuf); - - if (ret) - break; - - from += n; - buf += n; - total += n; - len -= n; - } - - if (retlen) - *retlen = total; - - return ret; -} - -void doc_print(struct DiskOnChip *this) { - printf("%s at 0x%lX,\n" - "\t %d chip%s %s, size %d MB, \n" - "\t total size %ld MB, sector size %ld kB\n", - this->name, this->physadr, this->numchips, - this->numchips>1 ? "s" : "", this->chips_name, - 1 << (this->chipshift - 20), - this->totlen >> 20, this->erasesize >> 10); - - if (this->nftl_found) { - struct NFTLrecord *nftl = &this->nftl; - unsigned long bin_size, flash_size; - - bin_size = nftl->nb_boot_blocks * this->erasesize; - flash_size = (nftl->nb_blocks - nftl->nb_boot_blocks) * this->erasesize; - - printf("\t NFTL boot record:\n" - "\t Binary partition: size %ld%s\n" - "\t Flash disk partition: size %ld%s, offset 0x%lx\n", - bin_size > (1 << 20) ? bin_size >> 20 : bin_size >> 10, - bin_size > (1 << 20) ? "MB" : "kB", - flash_size > (1 << 20) ? flash_size >> 20 : flash_size >> 10, - flash_size > (1 << 20) ? "MB" : "kB", bin_size); - } else { - puts ("\t No NFTL boot record found.\n"); - } -} - -/* ------------------------------------------------------------------------- */ - -/* This function is needed to avoid calls of the __ashrdi3 function. */ -static int shr(int val, int shift) { - return val >> shift; -} - -/* Perform the required delay cycles by reading from the appropriate register */ -static void DoC_Delay(struct DiskOnChip *doc, unsigned short cycles) -{ - volatile char dummy; - int i; - - for (i = 0; i < cycles; i++) { - if (DoC_is_Millennium(doc)) - dummy = ReadDOC(doc->virtadr, NOP); - else - dummy = ReadDOC(doc->virtadr, DOCStatus); - } - -} - -/* DOC_WaitReady: Wait for RDY line to be asserted by the flash chip */ -static int _DoC_WaitReady(struct DiskOnChip *doc) -{ - unsigned long docptr = doc->virtadr; - unsigned long start = get_timer(0); - -#ifdef PSYCHO_DEBUG - puts ("_DoC_WaitReady called for out-of-line wait\n"); -#endif - - /* Out-of-line routine to wait for chip response */ - while (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) { -#ifdef CONFIG_SYS_DOC_SHORT_TIMEOUT - /* it seems that after a certain time the DoC deasserts - * the CDSN_CTRL_FR_B although it is not ready... - * using a short timout solve this (timer increments every ms) */ - if (get_timer(start) > 10) { - return DOC_ETIMEOUT; - } -#else - if (get_timer(start) > 10 * 1000) { - puts ("_DoC_WaitReady timed out.\n"); - return DOC_ETIMEOUT; - } -#endif - udelay(1); - } - - return 0; -} - -static int DoC_WaitReady(struct DiskOnChip *doc) -{ - unsigned long docptr = doc->virtadr; - /* This is inline, to optimise the common case, where it's ready instantly */ - int ret = 0; - - /* 4 read form NOP register should be issued in prior to the read from CDSNControl - see Software Requirement 11.4 item 2. */ - DoC_Delay(doc, 4); - - if (!(ReadDOC(docptr, CDSNControl) & CDSN_CTRL_FR_B)) - /* Call the out-of-line routine to wait */ - ret = _DoC_WaitReady(doc); - - /* issue 2 read from NOP register after reading from CDSNControl register - see Software Requirement 11.4 item 2. */ - DoC_Delay(doc, 2); - - return ret; -} - -/* DoC_Command: Send a flash command to the flash chip through the CDSN Slow IO register to - bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is - required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ - -static inline int DoC_Command(struct DiskOnChip *doc, unsigned char command, - unsigned char xtraflags) -{ - unsigned long docptr = doc->virtadr; - - if (DoC_is_2000(doc)) - xtraflags |= CDSN_CTRL_FLASH_IO; - - /* Assert the CLE (Command Latch Enable) line to the flash chip */ - WriteDOC(xtraflags | CDSN_CTRL_CLE | CDSN_CTRL_CE, docptr, CDSNControl); - DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ - - if (DoC_is_Millennium(doc)) - WriteDOC(command, docptr, CDSNSlowIO); - - /* Send the command */ - WriteDOC_(command, docptr, doc->ioreg); - - /* Lower the CLE line */ - WriteDOC(xtraflags | CDSN_CTRL_CE, docptr, CDSNControl); - DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ - - /* Wait for the chip to respond - Software requirement 11.4.1 (extended for any command) */ - return DoC_WaitReady(doc); -} - -/* DoC_Address: Set the current address for the flash chip through the CDSN Slow IO register to - bypass the internal pipeline. Each of 4 delay cycles (read from the NOP register) is - required after writing to CDSN Control register, see Software Requirement 11.4 item 3. */ - -static int DoC_Address(struct DiskOnChip *doc, int numbytes, unsigned long ofs, - unsigned char xtraflags1, unsigned char xtraflags2) -{ - unsigned long docptr; - int i; - - docptr = doc->virtadr; - - if (DoC_is_2000(doc)) - xtraflags1 |= CDSN_CTRL_FLASH_IO; - - /* Assert the ALE (Address Latch Enable) line to the flash chip */ - WriteDOC(xtraflags1 | CDSN_CTRL_ALE | CDSN_CTRL_CE, docptr, CDSNControl); - - DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ - - /* Send the address */ - /* Devices with 256-byte page are addressed as: - Column (bits 0-7), Page (bits 8-15, 16-23, 24-31) - * there is no device on the market with page256 - and more than 24 bits. - Devices with 512-byte page are addressed as: - Column (bits 0-7), Page (bits 9-16, 17-24, 25-31) - * 25-31 is sent only if the chip support it. - * bit 8 changes the read command to be sent - (NAND_CMD_READ0 or NAND_CMD_READ1). - */ - - if (numbytes == ADDR_COLUMN || numbytes == ADDR_COLUMN_PAGE) { - if (DoC_is_Millennium(doc)) - WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); - WriteDOC_(ofs & 0xff, docptr, doc->ioreg); - } - - if (doc->page256) { - ofs = ofs >> 8; - } else { - ofs = ofs >> 9; - } - - if (numbytes == ADDR_PAGE || numbytes == ADDR_COLUMN_PAGE) { - for (i = 0; i < doc->pageadrlen; i++, ofs = ofs >> 8) { - if (DoC_is_Millennium(doc)) - WriteDOC(ofs & 0xff, docptr, CDSNSlowIO); - WriteDOC_(ofs & 0xff, docptr, doc->ioreg); - } - } - - DoC_Delay(doc, 2); /* Needed for some slow flash chips. mf. */ - - /* FIXME: The SlowIO's for millennium could be replaced by - a single WritePipeTerm here. mf. */ - - /* Lower the ALE line */ - WriteDOC(xtraflags1 | xtraflags2 | CDSN_CTRL_CE, docptr, - CDSNControl); - - DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ - - /* Wait for the chip to respond - Software requirement 11.4.1 */ - return DoC_WaitReady(doc); -} - -/* Read a buffer from DoC, taking care of Millennium oddities */ -static void DoC_ReadBuf(struct DiskOnChip *doc, u_char * buf, int len) -{ - volatile int dummy; - int modulus = 0xffff; - unsigned long docptr; - int i; - - docptr = doc->virtadr; - - if (len <= 0) - return; - - if (DoC_is_Millennium(doc)) { - /* Read the data via the internal pipeline through CDSN IO register, - see Pipelined Read Operations 11.3 */ - dummy = ReadDOC(docptr, ReadPipeInit); - - /* Millennium should use the LastDataRead register - Pipeline Reads */ - len--; - - /* This is needed for correctly ECC calculation */ - modulus = 0xff; - } - - for (i = 0; i < len; i++) - buf[i] = ReadDOC_(docptr, doc->ioreg + (i & modulus)); - - if (DoC_is_Millennium(doc)) { - buf[i] = ReadDOC(docptr, LastDataRead); - } -} - -/* Write a buffer to DoC, taking care of Millennium oddities */ -static void DoC_WriteBuf(struct DiskOnChip *doc, const u_char * buf, int len) -{ - unsigned long docptr; - int i; - - docptr = doc->virtadr; - - if (len <= 0) - return; - - for (i = 0; i < len; i++) - WriteDOC_(buf[i], docptr, doc->ioreg + i); - - if (DoC_is_Millennium(doc)) { - WriteDOC(0x00, docptr, WritePipeTerm); - } -} - - -/* DoC_SelectChip: Select a given flash chip within the current floor */ - -static inline int DoC_SelectChip(struct DiskOnChip *doc, int chip) -{ - unsigned long docptr = doc->virtadr; - - /* Software requirement 11.4.4 before writing DeviceSelect */ - /* Deassert the CE line to eliminate glitches on the FCE# outputs */ - WriteDOC(CDSN_CTRL_WP, docptr, CDSNControl); - DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ - - /* Select the individual flash chip requested */ - WriteDOC(chip, docptr, CDSNDeviceSelect); - DoC_Delay(doc, 4); - - /* Reassert the CE line */ - WriteDOC(CDSN_CTRL_CE | CDSN_CTRL_FLASH_IO | CDSN_CTRL_WP, docptr, - CDSNControl); - DoC_Delay(doc, 4); /* Software requirement 11.4.3 for Millennium */ - - /* Wait for it to be ready */ - return DoC_WaitReady(doc); -} - -/* DoC_SelectFloor: Select a given floor (bank of flash chips) */ - -static inline int DoC_SelectFloor(struct DiskOnChip *doc, int floor) -{ - unsigned long docptr = doc->virtadr; - - /* Select the floor (bank) of chips required */ - WriteDOC(floor, docptr, FloorSelect); - - /* Wait for the chip to be ready */ - return DoC_WaitReady(doc); -} - -/* DoC_IdentChip: Identify a given NAND chip given {floor,chip} */ - -static int DoC_IdentChip(struct DiskOnChip *doc, int floor, int chip) -{ - int mfr, id, i; - volatile char dummy; - - /* Page in the required floor/chip */ - DoC_SelectFloor(doc, floor); - DoC_SelectChip(doc, chip); - - /* Reset the chip */ - if (DoC_Command(doc, NAND_CMD_RESET, CDSN_CTRL_WP)) { -#ifdef DOC_DEBUG - printf("DoC_Command (reset) for %d,%d returned true\n", - floor, chip); -#endif - return 0; - } - - - /* Read the NAND chip ID: 1. Send ReadID command */ - if (DoC_Command(doc, NAND_CMD_READID, CDSN_CTRL_WP)) { -#ifdef DOC_DEBUG - printf("DoC_Command (ReadID) for %d,%d returned true\n", - floor, chip); -#endif - return 0; - } - - /* Read the NAND chip ID: 2. Send address byte zero */ - DoC_Address(doc, ADDR_COLUMN, 0, CDSN_CTRL_WP, 0); - - /* Read the manufacturer and device id codes from the device */ - - /* CDSN Slow IO register see Software Requirement 11.4 item 5. */ - dummy = ReadDOC(doc->virtadr, CDSNSlowIO); - DoC_Delay(doc, 2); - mfr = ReadDOC_(doc->virtadr, doc->ioreg); - - /* CDSN Slow IO register see Software Requirement 11.4 item 5. */ - dummy = ReadDOC(doc->virtadr, CDSNSlowIO); - DoC_Delay(doc, 2); - id = ReadDOC_(doc->virtadr, doc->ioreg); - - /* No response - return failure */ - if (mfr == 0xff || mfr == 0) - return 0; - - /* Check it's the same as the first chip we identified. - * M-Systems say that any given DiskOnChip device should only - * contain _one_ type of flash part, although that's not a - * hardware restriction. */ - if (doc->mfr) { - if (doc->mfr == mfr && doc->id == id) - return 1; /* This is another the same the first */ - else - printf("Flash chip at floor %d, chip %d is different:\n", - floor, chip); - } - - /* Print and store the manufacturer and ID codes. */ - for (i = 0; nand_flash_ids[i].name != NULL; i++) { - if (mfr == nand_flash_ids[i].manufacture_id && - id == nand_flash_ids[i].model_id) { -#ifdef DOC_DEBUG - printf("Flash chip found: Manufacturer ID: %2.2X, " - "Chip ID: %2.2X (%s)\n", mfr, id, - nand_flash_ids[i].name); -#endif - if (!doc->mfr) { - doc->mfr = mfr; - doc->id = id; - doc->chipshift = - nand_flash_ids[i].chipshift; - doc->page256 = nand_flash_ids[i].page256; - doc->pageadrlen = - nand_flash_ids[i].pageadrlen; - doc->erasesize = - nand_flash_ids[i].erasesize; - doc->chips_name = - nand_flash_ids[i].name; - return 1; - } - return 0; - } - } - - -#ifdef DOC_DEBUG - /* We haven't fully identified the chip. Print as much as we know. */ - printf("Unknown flash chip found: %2.2X %2.2X\n", - id, mfr); -#endif - - return 0; -} - -/* DoC_ScanChips: Find all NAND chips present in a DiskOnChip, and identify them */ - -static void DoC_ScanChips(struct DiskOnChip *this) -{ - int floor, chip; - int numchips[MAX_FLOORS]; - int maxchips = MAX_CHIPS; - int ret = 1; - - this->numchips = 0; - this->mfr = 0; - this->id = 0; - - if (DoC_is_Millennium(this)) - maxchips = MAX_CHIPS_MIL; - - /* For each floor, find the number of valid chips it contains */ - for (floor = 0; floor < MAX_FLOORS; floor++) { - ret = 1; - numchips[floor] = 0; - for (chip = 0; chip < maxchips && ret != 0; chip++) { - - ret = DoC_IdentChip(this, floor, chip); - if (ret) { - numchips[floor]++; - this->numchips++; - } - } - } - - /* If there are none at all that we recognise, bail */ - if (!this->numchips) { - puts ("No flash chips recognised.\n"); - return; - } - - /* Allocate an array to hold the information for each chip */ - this->chips = malloc(sizeof(struct Nand) * this->numchips); - if (!this->chips) { - puts ("No memory for allocating chip info structures\n"); - return; - } - - ret = 0; - - /* Fill out the chip array with {floor, chipno} for each - * detected chip in the device. */ - for (floor = 0; floor < MAX_FLOORS; floor++) { - for (chip = 0; chip < numchips[floor]; chip++) { - this->chips[ret].floor = floor; - this->chips[ret].chip = chip; - this->chips[ret].curadr = 0; - this->chips[ret].curmode = 0x50; - ret++; - } - } - - /* Calculate and print the total size of the device */ - this->totlen = this->numchips * (1 << this->chipshift); - -#ifdef DOC_DEBUG - printf("%d flash chips found. Total DiskOnChip size: %ld MB\n", - this->numchips, this->totlen >> 20); -#endif -} - -/* find_boot_record: Find the NFTL Media Header and its Spare copy which contains the - * various device information of the NFTL partition and Bad Unit Table. Update - * the ReplUnitTable[] table accroding to the Bad Unit Table. ReplUnitTable[] - * is used for management of Erase Unit in other routines in nftl.c and nftlmount.c - */ -static int find_boot_record(struct NFTLrecord *nftl) -{ - struct nftl_uci1 h1; - struct nftl_oob oob; - unsigned int block, boot_record_count = 0; - int retlen; - u8 buf[SECTORSIZE]; - struct NFTLMediaHeader *mh = &nftl->MediaHdr; - unsigned int i; - - nftl->MediaUnit = BLOCK_NIL; - nftl->SpareMediaUnit = BLOCK_NIL; - - /* search for a valid boot record */ - for (block = 0; block < nftl->nb_blocks; block++) { - int ret; - - /* Check for ANAND header first. Then can whinge if it's found but later - checks fail */ - if ((ret = doc_read_ecc(nftl->mtd, block * nftl->EraseSize, SECTORSIZE, - (size_t *)&retlen, buf, NULL))) { - static int warncount = 5; - - if (warncount) { - printf("Block read at 0x%x failed\n", block * nftl->EraseSize); - if (!--warncount) - puts ("Further failures for this block will not be printed\n"); - } - continue; - } - - if (retlen < 6 || memcmp(buf, "ANAND", 6)) { - /* ANAND\0 not found. Continue */ -#ifdef PSYCHO_DEBUG - printf("ANAND header not found at 0x%x\n", block * nftl->EraseSize); -#endif - continue; - } - -#ifdef NFTL_DEBUG - printf("ANAND header found at 0x%x\n", block * nftl->EraseSize); -#endif - - /* To be safer with BIOS, also use erase mark as discriminant */ - if ((ret = doc_read_oob(nftl->mtd, block * nftl->EraseSize + SECTORSIZE + 8, - 8, (size_t *)&retlen, (uchar *)&h1) < 0)) { -#ifdef NFTL_DEBUG - printf("ANAND header found at 0x%x, but OOB data read failed\n", - block * nftl->EraseSize); -#endif - continue; - } - - /* OK, we like it. */ - - if (boot_record_count) { - /* We've already processed one. So we just check if - this one is the same as the first one we found */ - if (memcmp(mh, buf, sizeof(struct NFTLMediaHeader))) { -#ifdef NFTL_DEBUG - printf("NFTL Media Headers at 0x%x and 0x%x disagree.\n", - nftl->MediaUnit * nftl->EraseSize, block * nftl->EraseSize); -#endif - /* if (debug) Print both side by side */ - return -1; - } - if (boot_record_count == 1) - nftl->SpareMediaUnit = block; - - boot_record_count++; - continue; - } - - /* This is the first we've seen. Copy the media header structure into place */ - memcpy(mh, buf, sizeof(struct NFTLMediaHeader)); - - /* Do some sanity checks on it */ - if (mh->UnitSizeFactor == 0) { -#ifdef NFTL_DEBUG - puts ("UnitSizeFactor 0x00 detected.\n" - "This violates the spec but we think we know what it means...\n"); -#endif - } else if (mh->UnitSizeFactor != 0xff) { - printf ("Sorry, we don't support UnitSizeFactor " - "of != 1 yet.\n"); - return -1; - } - - nftl->nb_boot_blocks = le16_to_cpu(mh->FirstPhysicalEUN); - if ((nftl->nb_boot_blocks + 2) >= nftl->nb_blocks) { - printf ("NFTL Media Header sanity check failed:\n" - "nb_boot_blocks (%d) + 2 > nb_blocks (%d)\n", - nftl->nb_boot_blocks, nftl->nb_blocks); - return -1; - } - - nftl->numvunits = le32_to_cpu(mh->FormattedSize) / nftl->EraseSize; - if (nftl->numvunits > (nftl->nb_blocks - nftl->nb_boot_blocks - 2)) { - printf ("NFTL Media Header sanity check failed:\n" - "numvunits (%d) > nb_blocks (%d) - nb_boot_blocks(%d) - 2\n", - nftl->numvunits, - nftl->nb_blocks, - nftl->nb_boot_blocks); - return -1; - } - - nftl->nr_sects = nftl->numvunits * (nftl->EraseSize / SECTORSIZE); - - /* If we're not using the last sectors in the device for some reason, - reduce nb_blocks accordingly so we forget they're there */ - nftl->nb_blocks = le16_to_cpu(mh->NumEraseUnits) + le16_to_cpu(mh->FirstPhysicalEUN); - - /* read the Bad Erase Unit Table and modify ReplUnitTable[] accordingly */ - for (i = 0; i < nftl->nb_blocks; i++) { - if ((i & (SECTORSIZE - 1)) == 0) { - /* read one sector for every SECTORSIZE of blocks */ - if ((ret = doc_read_ecc(nftl->mtd, block * nftl->EraseSize + - i + SECTORSIZE, SECTORSIZE, - (size_t *)&retlen, buf, (uchar *)&oob)) < 0) { - puts ("Read of bad sector table failed\n"); - return -1; - } - } - /* mark the Bad Erase Unit as RESERVED in ReplUnitTable */ - if (buf[i & (SECTORSIZE - 1)] != 0xff) - nftl->ReplUnitTable[i] = BLOCK_RESERVED; - } - - nftl->MediaUnit = block; - boot_record_count++; - - } /* foreach (block) */ - - return boot_record_count?0:-1; -} - -/* 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. - */ -static void DoC2k_init(struct DiskOnChip* this) -{ - struct NFTLrecord *nftl; - - switch (this->ChipID) { - case DOC_ChipID_Doc2k: - this->name = "DiskOnChip 2000"; - this->ioreg = DoC_2k_CDSN_IO; - break; - case DOC_ChipID_DocMil: - this->name = "DiskOnChip Millennium"; - this->ioreg = DoC_Mil_CDSN_IO; - break; - } - -#ifdef DOC_DEBUG - printf("%s found at address 0x%lX\n", this->name, - this->physadr); -#endif - - this->totlen = 0; - this->numchips = 0; - - this->curfloor = -1; - this->curchip = -1; - - /* Ident all the chips present. */ - DoC_ScanChips(this); - if ((!this->numchips) || (!this->chips)) - return; - - nftl = &this->nftl; - - /* Get physical parameters */ - nftl->EraseSize = this->erasesize; - nftl->nb_blocks = this->totlen / this->erasesize; - nftl->mtd = this; - - if (find_boot_record(nftl) != 0) - this->nftl_found = 0; - else - this->nftl_found = 1; - - printf("%s @ 0x%lX, %ld MB\n", this->name, this->physadr, this->totlen >> 20); -} - -int doc_read_ecc(struct DiskOnChip* this, loff_t from, size_t len, - size_t * retlen, u_char * buf, u_char * eccbuf) -{ - unsigned long docptr; - struct Nand *mychip; - unsigned char syndrome[6]; - volatile char dummy; - int i, len256 = 0, ret=0; - - docptr = this->virtadr; - - /* Don't allow read past end of device */ - if (from >= this->totlen) { - puts ("Out of flash\n"); - return DOC_EINVAL; - } - - /* Don't allow a single read to cross a 512-byte block boundary */ - if (from + len > ((from | 0x1ff) + 1)) - len = ((from | 0x1ff) + 1) - from; - - /* The ECC will not be calculated correctly if less than 512 is read */ - if (len != 0x200 && eccbuf) - printf("ECC needs a full sector read (adr: %lx size %lx)\n", - (long) from, (long) len); - -#ifdef PSYCHO_DEBUG - printf("DoC_Read (adr: %lx size %lx)\n", (long) from, (long) len); -#endif - - /* Find the chip which is to be used and select it */ - mychip = &this->chips[shr(from, this->chipshift)]; - - if (this->curfloor != mychip->floor) { - DoC_SelectFloor(this, mychip->floor); - DoC_SelectChip(this, mychip->chip); - } else if (this->curchip != mychip->chip) { - DoC_SelectChip(this, mychip->chip); - } - - this->curfloor = mychip->floor; - this->curchip = mychip->chip; - - DoC_Command(this, - (!this->page256 - && (from & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, - CDSN_CTRL_WP); - DoC_Address(this, ADDR_COLUMN_PAGE, from, CDSN_CTRL_WP, - CDSN_CTRL_ECC_IO); - - if (eccbuf) { - /* Prime the ECC engine */ - WriteDOC(DOC_ECC_RESET, docptr, ECCConf); - WriteDOC(DOC_ECC_EN, docptr, ECCConf); - } else { - /* disable the ECC engine */ - WriteDOC(DOC_ECC_RESET, docptr, ECCConf); - WriteDOC(DOC_ECC_DIS, docptr, ECCConf); - } - - /* treat crossing 256-byte sector for 2M x 8bits devices */ - if (this->page256 && from + len > (from | 0xff) + 1) { - len256 = (from | 0xff) + 1 - from; - DoC_ReadBuf(this, buf, len256); - - DoC_Command(this, NAND_CMD_READ0, CDSN_CTRL_WP); - DoC_Address(this, ADDR_COLUMN_PAGE, from + len256, - CDSN_CTRL_WP, CDSN_CTRL_ECC_IO); - } - - DoC_ReadBuf(this, &buf[len256], len - len256); - - /* Let the caller know we completed it */ - *retlen = len; - - if (eccbuf) { - /* Read the ECC data through the DiskOnChip ECC logic */ - /* Note: this will work even with 2M x 8bit devices as */ - /* they have 8 bytes of OOB per 256 page. mf. */ - DoC_ReadBuf(this, eccbuf, 6); - - /* Flush the pipeline */ - if (DoC_is_Millennium(this)) { - dummy = ReadDOC(docptr, ECCConf); - dummy = ReadDOC(docptr, ECCConf); - i = ReadDOC(docptr, ECCConf); - } else { - dummy = ReadDOC(docptr, 2k_ECCStatus); - dummy = ReadDOC(docptr, 2k_ECCStatus); - i = ReadDOC(docptr, 2k_ECCStatus); - } - - /* Check the ECC Status */ - if (i & 0x80) { - int nb_errors; - /* There was an ECC error */ -#ifdef ECC_DEBUG - printf("DiskOnChip ECC Error: Read at %lx\n", (long)from); -#endif - /* Read the ECC syndrom through the DiskOnChip ECC logic. - These syndrome will be all ZERO when there is no error */ - for (i = 0; i < 6; i++) { - syndrome[i] = - ReadDOC(docptr, ECCSyndrome0 + i); - } - nb_errors = doc_decode_ecc(buf, syndrome); - -#ifdef ECC_DEBUG - printf("Errors corrected: %x\n", nb_errors); -#endif - if (nb_errors < 0) { - /* We return error, but have actually done the read. Not that - this can be told to user-space, via sys_read(), but at least - MTD-aware stuff can know about it by checking *retlen */ - printf("ECC Errors at %lx\n", (long)from); - ret = DOC_EECC; - } - } - -#ifdef PSYCHO_DEBUG - printf("ECC DATA at %lxB: %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", - (long)from, eccbuf[0], eccbuf[1], eccbuf[2], - eccbuf[3], eccbuf[4], eccbuf[5]); -#endif - - /* disable the ECC engine */ - WriteDOC(DOC_ECC_DIS, docptr , ECCConf); - } - - /* according to 11.4.1, we need to wait for the busy line - * drop if we read to the end of the page. */ - if(0 == ((from + *retlen) & 0x1ff)) - { - DoC_WaitReady(this); - } - - return ret; -} - -int doc_write_ecc(struct DiskOnChip* this, loff_t to, size_t len, - size_t * retlen, const u_char * buf, - u_char * eccbuf) -{ - int di; /* Yes, DI is a hangover from when I was disassembling the binary driver */ - unsigned long docptr; - volatile char dummy; - int len256 = 0; - struct Nand *mychip; - - docptr = this->virtadr; - - /* Don't allow write past end of device */ - if (to >= this->totlen) { - puts ("Out of flash\n"); - return DOC_EINVAL; - } - - /* Don't allow a single write to cross a 512-byte block boundary */ - if (to + len > ((to | 0x1ff) + 1)) - len = ((to | 0x1ff) + 1) - to; - - /* The ECC will not be calculated correctly if less than 512 is written */ - if (len != 0x200 && eccbuf) - printf("ECC needs a full sector write (adr: %lx size %lx)\n", - (long) to, (long) len); - - /* printf("DoC_Write (adr: %lx size %lx)\n", (long) to, (long) len); */ - - /* Find the chip which is to be used and select it */ - mychip = &this->chips[shr(to, this->chipshift)]; - - if (this->curfloor != mychip->floor) { - DoC_SelectFloor(this, mychip->floor); - DoC_SelectChip(this, mychip->chip); - } else if (this->curchip != mychip->chip) { - DoC_SelectChip(this, mychip->chip); - } - - this->curfloor = mychip->floor; - this->curchip = mychip->chip; - - /* Set device to main plane of flash */ - DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); - DoC_Command(this, - (!this->page256 - && (to & 0x100)) ? NAND_CMD_READ1 : NAND_CMD_READ0, - CDSN_CTRL_WP); - - DoC_Command(this, NAND_CMD_SEQIN, 0); - DoC_Address(this, ADDR_COLUMN_PAGE, to, 0, CDSN_CTRL_ECC_IO); - - if (eccbuf) { - /* Prime the ECC engine */ - WriteDOC(DOC_ECC_RESET, docptr, ECCConf); - WriteDOC(DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf); - } else { - /* disable the ECC engine */ - WriteDOC(DOC_ECC_RESET, docptr, ECCConf); - WriteDOC(DOC_ECC_DIS, docptr, ECCConf); - } - - /* treat crossing 256-byte sector for 2M x 8bits devices */ - if (this->page256 && to + len > (to | 0xff) + 1) { - len256 = (to | 0xff) + 1 - to; - DoC_WriteBuf(this, buf, len256); - - DoC_Command(this, NAND_CMD_PAGEPROG, 0); - - DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); - /* There's an implicit DoC_WaitReady() in DoC_Command */ - - dummy = ReadDOC(docptr, CDSNSlowIO); - DoC_Delay(this, 2); - - if (ReadDOC_(docptr, this->ioreg) & 1) { - puts ("Error programming flash\n"); - /* Error in programming */ - *retlen = 0; - return DOC_EIO; - } - - DoC_Command(this, NAND_CMD_SEQIN, 0); - DoC_Address(this, ADDR_COLUMN_PAGE, to + len256, 0, - CDSN_CTRL_ECC_IO); - } - - DoC_WriteBuf(this, &buf[len256], len - len256); - - if (eccbuf) { - WriteDOC(CDSN_CTRL_ECC_IO | CDSN_CTRL_CE, docptr, - CDSNControl); - - if (DoC_is_Millennium(this)) { - WriteDOC(0, docptr, NOP); - WriteDOC(0, docptr, NOP); - WriteDOC(0, docptr, NOP); - } else { - WriteDOC_(0, docptr, this->ioreg); - WriteDOC_(0, docptr, this->ioreg); - WriteDOC_(0, docptr, this->ioreg); - } - - /* Read the ECC data through the DiskOnChip ECC logic */ - for (di = 0; di < 6; di++) { - eccbuf[di] = ReadDOC(docptr, ECCSyndrome0 + di); - } - - /* Reset the ECC engine */ - WriteDOC(DOC_ECC_DIS, docptr, ECCConf); - -#ifdef PSYCHO_DEBUG - printf - ("OOB data at %lx is %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n", - (long) to, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3], - eccbuf[4], eccbuf[5]); -#endif - } - - DoC_Command(this, NAND_CMD_PAGEPROG, 0); - - DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); - /* There's an implicit DoC_WaitReady() in DoC_Command */ - - dummy = ReadDOC(docptr, CDSNSlowIO); - DoC_Delay(this, 2); - - if (ReadDOC_(docptr, this->ioreg) & 1) { - puts ("Error programming flash\n"); - /* Error in programming */ - *retlen = 0; - return DOC_EIO; - } - - /* Let the caller know we completed it */ - *retlen = len; - - if (eccbuf) { - unsigned char x[8]; - size_t dummy; - int ret; - - /* Write the ECC data to flash */ - for (di=0; di<6; di++) - x[di] = eccbuf[di]; - - x[6]=0x55; - x[7]=0x55; - - ret = doc_write_oob(this, to, 8, &dummy, x); - return ret; - } - return 0; -} - -int doc_read_oob(struct DiskOnChip* this, loff_t ofs, size_t len, - size_t * retlen, u_char * buf) -{ - int len256 = 0, ret; - unsigned long docptr; - struct Nand *mychip; - - docptr = this->virtadr; - - mychip = &this->chips[shr(ofs, this->chipshift)]; - - if (this->curfloor != mychip->floor) { - DoC_SelectFloor(this, mychip->floor); - DoC_SelectChip(this, mychip->chip); - } else if (this->curchip != mychip->chip) { - DoC_SelectChip(this, mychip->chip); - } - this->curfloor = mychip->floor; - this->curchip = mychip->chip; - - /* update address for 2M x 8bit devices. OOB starts on the second */ - /* page to maintain compatibility with doc_read_ecc. */ - if (this->page256) { - if (!(ofs & 0x8)) - ofs += 0x100; - else - ofs -= 0x8; - } - - DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); - DoC_Address(this, ADDR_COLUMN_PAGE, ofs, CDSN_CTRL_WP, 0); - - /* treat crossing 8-byte OOB data for 2M x 8bit devices */ - /* Note: datasheet says it should automaticaly wrap to the */ - /* next OOB block, but it didn't work here. mf. */ - if (this->page256 && ofs + len > (ofs | 0x7) + 1) { - len256 = (ofs | 0x7) + 1 - ofs; - DoC_ReadBuf(this, buf, len256); - - DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); - DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), - CDSN_CTRL_WP, 0); - } - - DoC_ReadBuf(this, &buf[len256], len - len256); - - *retlen = len; - /* Reading the full OOB data drops us off of the end of the page, - * causing the flash device to go into busy mode, so we need - * to wait until ready 11.4.1 and Toshiba TC58256FT docs */ - - ret = DoC_WaitReady(this); - - return ret; - -} - -int doc_write_oob(struct DiskOnChip* this, loff_t ofs, size_t len, - size_t * retlen, const u_char * buf) -{ - int len256 = 0; - unsigned long docptr = this->virtadr; - struct Nand *mychip = &this->chips[shr(ofs, this->chipshift)]; - volatile int dummy; - -#ifdef PSYCHO_DEBUG - printf("doc_write_oob(%lx, %d): %2.2X %2.2X %2.2X %2.2X ... %2.2X %2.2X .. %2.2X %2.2X\n", - (long)ofs, len, buf[0], buf[1], buf[2], buf[3], - buf[8], buf[9], buf[14],buf[15]); -#endif - - /* Find the chip which is to be used and select it */ - if (this->curfloor != mychip->floor) { - DoC_SelectFloor(this, mychip->floor); - DoC_SelectChip(this, mychip->chip); - } else if (this->curchip != mychip->chip) { - DoC_SelectChip(this, mychip->chip); - } - this->curfloor = mychip->floor; - this->curchip = mychip->chip; - - /* disable the ECC engine */ - WriteDOC (DOC_ECC_RESET, docptr, ECCConf); - WriteDOC (DOC_ECC_DIS, docptr, ECCConf); - - /* Reset the chip, see Software Requirement 11.4 item 1. */ - DoC_Command(this, NAND_CMD_RESET, CDSN_CTRL_WP); - - /* issue the Read2 command to set the pointer to the Spare Data Area. */ - DoC_Command(this, NAND_CMD_READOOB, CDSN_CTRL_WP); - - /* update address for 2M x 8bit devices. OOB starts on the second */ - /* page to maintain compatibility with doc_read_ecc. */ - if (this->page256) { - if (!(ofs & 0x8)) - ofs += 0x100; - else - ofs -= 0x8; - } - - /* issue the Serial Data In command to initial the Page Program process */ - DoC_Command(this, NAND_CMD_SEQIN, 0); - DoC_Address(this, ADDR_COLUMN_PAGE, ofs, 0, 0); - - /* treat crossing 8-byte OOB data for 2M x 8bit devices */ - /* Note: datasheet says it should automaticaly wrap to the */ - /* next OOB block, but it didn't work here. mf. */ - if (this->page256 && ofs + len > (ofs | 0x7) + 1) { - len256 = (ofs | 0x7) + 1 - ofs; - DoC_WriteBuf(this, buf, len256); - - DoC_Command(this, NAND_CMD_PAGEPROG, 0); - DoC_Command(this, NAND_CMD_STATUS, 0); - /* DoC_WaitReady() is implicit in DoC_Command */ - - dummy = ReadDOC(docptr, CDSNSlowIO); - DoC_Delay(this, 2); - - if (ReadDOC_(docptr, this->ioreg) & 1) { - puts ("Error programming oob data\n"); - /* There was an error */ - *retlen = 0; - return DOC_EIO; - } - DoC_Command(this, NAND_CMD_SEQIN, 0); - DoC_Address(this, ADDR_COLUMN_PAGE, ofs & (~0x1ff), 0, 0); - } - - DoC_WriteBuf(this, &buf[len256], len - len256); - - DoC_Command(this, NAND_CMD_PAGEPROG, 0); - DoC_Command(this, NAND_CMD_STATUS, 0); - /* DoC_WaitReady() is implicit in DoC_Command */ - - dummy = ReadDOC(docptr, CDSNSlowIO); - DoC_Delay(this, 2); - - if (ReadDOC_(docptr, this->ioreg) & 1) { - puts ("Error programming oob data\n"); - /* There was an error */ - *retlen = 0; - return DOC_EIO; - } - - *retlen = len; - return 0; - -} - -int doc_erase(struct DiskOnChip* this, loff_t ofs, size_t len) -{ - volatile int dummy; - unsigned long docptr; - struct Nand *mychip; - - if (ofs & (this->erasesize-1) || len & (this->erasesize-1)) { - puts ("Offset and size must be sector aligned\n"); - return DOC_EINVAL; - } - - docptr = this->virtadr; - - /* FIXME: Do this in the background. Use timers or schedule_task() */ - while(len) { - mychip = &this->chips[shr(ofs, this->chipshift)]; - - if (this->curfloor != mychip->floor) { - DoC_SelectFloor(this, mychip->floor); - DoC_SelectChip(this, mychip->chip); - } else if (this->curchip != mychip->chip) { - DoC_SelectChip(this, mychip->chip); - } - this->curfloor = mychip->floor; - this->curchip = mychip->chip; - - DoC_Command(this, NAND_CMD_ERASE1, 0); - DoC_Address(this, ADDR_PAGE, ofs, 0, 0); - DoC_Command(this, NAND_CMD_ERASE2, 0); - - DoC_Command(this, NAND_CMD_STATUS, CDSN_CTRL_WP); - - dummy = ReadDOC(docptr, CDSNSlowIO); - DoC_Delay(this, 2); - - if (ReadDOC_(docptr, this->ioreg) & 1) { - printf("Error erasing at 0x%lx\n", (long)ofs); - /* There was an error */ - goto callback; - } - ofs += this->erasesize; - len -= this->erasesize; - } - - callback: - return 0; -} - -static inline int doccheck(unsigned long potential, unsigned long physadr) -{ - unsigned long window=potential; - unsigned char tmp, ChipID; -#ifndef DOC_PASSIVE_PROBE - unsigned char tmp2; -#endif - - /* Routine copied from the Linux DOC driver */ - -#ifdef CONFIG_SYS_DOCPROBE_55AA - /* Check for 0x55 0xAA signature at beginning of window, - this is no longer true once we remove the IPL (for Millennium */ - if (ReadDOC(window, Sig1) != 0x55 || ReadDOC(window, Sig2) != 0xaa) - return 0; -#endif /* CONFIG_SYS_DOCPROBE_55AA */ - -#ifndef DOC_PASSIVE_PROBE - /* It's not possible to cleanly detect the DiskOnChip - the - * bootup procedure will put the device into reset mode, and - * it's not possible to talk to it without actually writing - * to the DOCControl register. So we store the current contents - * of the DOCControl register's location, in case we later decide - * that it's not a DiskOnChip, and want to put it back how we - * found it. - */ - tmp2 = ReadDOC(window, DOCControl); - - /* Reset the DiskOnChip ASIC */ - WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, - window, DOCControl); - WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, - window, DOCControl); - - /* Enable the DiskOnChip ASIC */ - WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, - window, DOCControl); - WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, - window, DOCControl); -#endif /* !DOC_PASSIVE_PROBE */ - - ChipID = ReadDOC(window, ChipID); - - switch (ChipID) { - case DOC_ChipID_Doc2k: - /* Check the TOGGLE bit in the ECC register */ - tmp = ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT; - if ((ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT) != tmp) - return ChipID; - break; - - case DOC_ChipID_DocMil: - /* Check the TOGGLE bit in the ECC register */ - tmp = ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT; - if ((ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT) != tmp) - return ChipID; - break; - - default: -#ifndef CONFIG_SYS_DOCPROBE_55AA -/* - * if the ID isn't the DoC2000 or DoCMillenium ID, so we can assume - * the DOC is missing - */ -# if 0 - printf("Possible DiskOnChip with unknown ChipID %2.2X found at 0x%lx\n", - ChipID, physadr); -# endif -#endif -#ifndef DOC_PASSIVE_PROBE - /* Put back the contents of the DOCControl register, in case it's not - * actually a DiskOnChip. - */ - WriteDOC(tmp2, window, DOCControl); -#endif - return 0; - } - - puts ("DiskOnChip failed TOGGLE test, dropping.\n"); - -#ifndef DOC_PASSIVE_PROBE - /* Put back the contents of the DOCControl register: it's not a DiskOnChip */ - WriteDOC(tmp2, window, DOCControl); -#endif - return 0; -} - -void doc_probe(unsigned long physadr) -{ - struct DiskOnChip *this = NULL; - int i=0, ChipID; - - if ((ChipID = doccheck(physadr, physadr))) { - - for (i=0; i<CONFIG_SYS_MAX_DOC_DEVICE; i++) { - if (doc_dev_desc[i].ChipID == DOC_ChipID_UNKNOWN) { - this = doc_dev_desc + i; - break; - } - } - - if (!this) { - puts ("Cannot allocate memory for data structures.\n"); - return; - } - - if (curr_device == -1) - curr_device = i; - - memset((char *)this, 0, sizeof(struct DiskOnChip)); - - this->virtadr = physadr; - this->physadr = physadr; - this->ChipID = ChipID; - - DoC2k_init(this); - } else { - puts ("No DiskOnChip found\n"); - } -} -#else -void doc_probe(unsigned long physadr) {} -#endif |
