diff options
Diffstat (limited to 'drivers/mtd/nand/nandsim.c')
-rw-r--r-- | drivers/mtd/nand/nandsim.c | 164 |
1 files changed, 82 insertions, 82 deletions
diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c index 754b6ed7ce1..a0af92cc7ef 100644 --- a/drivers/mtd/nand/nandsim.c +++ b/drivers/mtd/nand/nandsim.c @@ -3,7 +3,7 @@ * * Author: Artem B. Bityuckiy <dedekind@oktetlabs.ru>, <dedekind@infradead.org> * - * Copyright (C) 2004 Nokia Corporation + * Copyright (C) 2004 Nokia Corporation * * Note: NS means "NAND Simulator". * Note: Input means input TO flash chip, output means output FROM chip. @@ -126,7 +126,7 @@ MODULE_PARM_DESC(dbg, "Output debug information if not zero"); /* The largest possible page size */ #define NS_LARGEST_PAGE_SIZE 2048 - + /* The prefix for simulator output */ #define NS_OUTPUT_PREFIX "[nandsim]" @@ -145,7 +145,7 @@ MODULE_PARM_DESC(dbg, "Output debug information if not zero"); do { if (do_delays) udelay(us); } while(0) #define NS_MDELAY(us) \ do { if (do_delays) mdelay(us); } while(0) - + /* Is the nandsim structure initialized ? */ #define NS_IS_INITIALIZED(ns) ((ns)->geom.totsz != 0) @@ -153,12 +153,12 @@ MODULE_PARM_DESC(dbg, "Output debug information if not zero"); #define NS_STATUS_OK(ns) (NAND_STATUS_READY | (NAND_STATUS_WP * ((ns)->lines.wp == 0))) /* Operation failed completion status */ -#define NS_STATUS_FAILED(ns) (NAND_STATUS_FAIL | NS_STATUS_OK(ns)) +#define NS_STATUS_FAILED(ns) (NAND_STATUS_FAIL | NS_STATUS_OK(ns)) /* Calculate the page offset in flash RAM image by (row, column) address */ #define NS_RAW_OFFSET(ns) \ (((ns)->regs.row << (ns)->geom.pgshift) + ((ns)->regs.row * (ns)->geom.oobsz) + (ns)->regs.column) - + /* Calculate the OOB offset in flash RAM image by (row, column) address */ #define NS_RAW_OFFSET_OOB(ns) (NS_RAW_OFFSET(ns) + ns->geom.pgsz) @@ -223,15 +223,15 @@ MODULE_PARM_DESC(dbg, "Output debug information if not zero"); /* Remove action bits ftom state */ #define NS_STATE(x) ((x) & ~ACTION_MASK) - -/* + +/* * Maximum previous states which need to be saved. Currently saving is * only needed for page programm operation with preceeded read command * (which is only valid for 512-byte pages). */ #define NS_MAX_PREVSTATES 1 -/* +/* * The structure which describes all the internal simulator data. */ struct nandsim { @@ -242,7 +242,7 @@ struct nandsim { uint32_t options; /* chip's characteristic bits */ uint32_t state; /* current chip state */ uint32_t nxstate; /* next expected state */ - + uint32_t *op; /* current operation, NULL operations isn't known yet */ uint32_t pstates[NS_MAX_PREVSTATES]; /* previous states */ uint16_t npstates; /* number of previous states saved */ @@ -413,7 +413,7 @@ init_nandsim(struct mtd_info *mtd) ns->geom.secaddrbytes = 3; } } - + /* Detect how many ID bytes the NAND chip outputs */ for (i = 0; nand_flash_ids[i].name != NULL; i++) { if (second_id_byte != nand_flash_ids[i].id) @@ -444,7 +444,7 @@ init_nandsim(struct mtd_info *mtd) #ifdef CONFIG_NS_ABS_POS ns->mem.byte = ioremap(CONFIG_NS_ABS_POS, ns->geom.totszoob); if (!ns->mem.byte) { - NS_ERR("init_nandsim: failed to map the NAND flash image at address %p\n", + NS_ERR("init_nandsim: failed to map the NAND flash image at address %p\n", (void *)CONFIG_NS_ABS_POS); return -ENOMEM; } @@ -567,7 +567,7 @@ static int check_command(int cmd) { switch (cmd) { - + case NAND_CMD_READ0: case NAND_CMD_READSTART: case NAND_CMD_PAGEPROG: @@ -580,7 +580,7 @@ check_command(int cmd) case NAND_CMD_RESET: case NAND_CMD_READ1: return 0; - + case NAND_CMD_STATUS_MULTI: default: return 1; @@ -631,7 +631,7 @@ static inline void accept_addr_byte(struct nandsim *ns, u_char bt) { uint byte = (uint)bt; - + if (ns->regs.count < (ns->geom.pgaddrbytes - ns->geom.secaddrbytes)) ns->regs.column |= (byte << 8 * ns->regs.count); else { @@ -642,11 +642,11 @@ accept_addr_byte(struct nandsim *ns, u_char bt) return; } - + /* * Switch to STATE_READY state. */ -static inline void +static inline void switch_to_ready_state(struct nandsim *ns, u_char status) { NS_DBG("switch_to_ready_state: switch to %s state\n", get_state_name(STATE_READY)); @@ -675,7 +675,7 @@ switch_to_ready_state(struct nandsim *ns, u_char status) * (for example program from the second half and read from the * second half operations both begin with the READ1 command). In this * case the ns->pstates[] array contains previous states. - * + * * Thus, the function tries to find operation containing the following * states (if the 'flag' parameter is 0): * ns->pstates[0], ... ns->pstates[ns->npstates], ns->state @@ -683,7 +683,7 @@ switch_to_ready_state(struct nandsim *ns, u_char status) * If (one and only one) matching operation is found, it is accepted ( * ns->ops, ns->state, ns->nxstate are initialized, ns->npstate is * zeroed). - * + * * If there are several maches, the current state is pushed to the * ns->pstates. * @@ -692,7 +692,7 @@ switch_to_ready_state(struct nandsim *ns, u_char status) * In such situation the function is called with 'flag' != 0, and the * operation is searched using the following pattern: * ns->pstates[0], ... ns->pstates[ns->npstates], <address input> - * + * * It is supposed that this pattern must either match one operation on * none. There can't be ambiguity in that case. * @@ -711,15 +711,15 @@ find_operation(struct nandsim *ns, uint32_t flag) { int opsfound = 0; int i, j, idx = 0; - + for (i = 0; i < NS_OPER_NUM; i++) { int found = 1; - + if (!(ns->options & ops[i].reqopts)) /* Ignore operations we can't perform */ continue; - + if (flag) { if (!(ops[i].states[ns->npstates] & STATE_ADDR_MASK)) continue; @@ -728,7 +728,7 @@ find_operation(struct nandsim *ns, uint32_t flag) continue; } - for (j = 0; j < ns->npstates; j++) + for (j = 0; j < ns->npstates; j++) if (NS_STATE(ops[i].states[j]) != NS_STATE(ns->pstates[j]) && (ns->options & ops[idx].reqopts)) { found = 0; @@ -745,7 +745,7 @@ find_operation(struct nandsim *ns, uint32_t flag) /* Exact match */ ns->op = &ops[idx].states[0]; if (flag) { - /* + /* * In this case the find_operation function was * called when address has just began input. But it isn't * yet fully input and the current state must @@ -763,7 +763,7 @@ find_operation(struct nandsim *ns, uint32_t flag) idx, get_state_name(ns->state), get_state_name(ns->nxstate)); return 0; } - + if (opsfound == 0) { /* Nothing was found. Try to ignore previous commands (if any) and search again */ if (ns->npstates != 0) { @@ -777,13 +777,13 @@ find_operation(struct nandsim *ns, uint32_t flag) switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); return -2; } - + if (flag) { /* This shouldn't happen */ NS_DBG("find_operation: BUG, operation must be known if address is input\n"); return -2; } - + NS_DBG("find_operation: there is still ambiguity\n"); ns->pstates[ns->npstates++] = ns->state; @@ -803,7 +803,7 @@ do_state_action(struct nandsim *ns, uint32_t action) int busdiv = ns->busw == 8 ? 1 : 2; action &= ACTION_MASK; - + /* Check that page address input is correct */ if (action != ACTION_SECERASE && ns->regs.row >= ns->geom.pgnum) { NS_WARN("do_state_action: wrong page number (%#x)\n", ns->regs.row); @@ -827,14 +827,14 @@ do_state_action(struct nandsim *ns, uint32_t action) NS_DBG("do_state_action: (ACTION_CPY:) copy %d bytes to int buf, raw offset %d\n", num, NS_RAW_OFFSET(ns) + ns->regs.off); - + if (ns->regs.off == 0) NS_LOG("read page %d\n", ns->regs.row); else if (ns->regs.off < ns->geom.pgsz) NS_LOG("read page %d (second half)\n", ns->regs.row); else NS_LOG("read OOB of page %d\n", ns->regs.row); - + NS_UDELAY(access_delay); NS_UDELAY(input_cycle * ns->geom.pgsz / 1000 / busdiv); @@ -844,30 +844,30 @@ do_state_action(struct nandsim *ns, uint32_t action) /* * Erase sector. */ - + if (ns->lines.wp) { NS_ERR("do_state_action: device is write-protected, ignore sector erase\n"); return -1; } - + if (ns->regs.row >= ns->geom.pgnum - ns->geom.pgsec || (ns->regs.row & ~(ns->geom.secsz - 1))) { NS_ERR("do_state_action: wrong sector address (%#x)\n", ns->regs.row); return -1; } - + ns->regs.row = (ns->regs.row << 8 * (ns->geom.pgaddrbytes - ns->geom.secaddrbytes)) | ns->regs.column; ns->regs.column = 0; - + NS_DBG("do_state_action: erase sector at address %#x, off = %d\n", ns->regs.row, NS_RAW_OFFSET(ns)); NS_LOG("erase sector %d\n", ns->regs.row >> (ns->geom.secshift - ns->geom.pgshift)); memset(ns->mem.byte + NS_RAW_OFFSET(ns), 0xFF, ns->geom.secszoob); - + NS_MDELAY(erase_delay); - + break; case ACTION_PRGPAGE: @@ -893,12 +893,12 @@ do_state_action(struct nandsim *ns, uint32_t action) NS_DBG("do_state_action: copy %d bytes from int buf to (%#x, %#x), raw off = %d\n", num, ns->regs.row, ns->regs.column, NS_RAW_OFFSET(ns) + ns->regs.off); NS_LOG("programm page %d\n", ns->regs.row); - + NS_UDELAY(programm_delay); NS_UDELAY(output_cycle * ns->geom.pgsz / 1000 / busdiv); - + break; - + case ACTION_ZEROOFF: NS_DBG("do_state_action: set internal offset to 0\n"); ns->regs.off = 0; @@ -918,7 +918,7 @@ do_state_action(struct nandsim *ns, uint32_t action) NS_DBG("do_state_action: set internal offset to %d\n", ns->geom.pgsz); ns->regs.off = ns->geom.pgsz; break; - + default: NS_DBG("do_state_action: BUG! unknown action\n"); } @@ -937,7 +937,7 @@ switch_state(struct nandsim *ns) * The current operation have already been identified. * Just follow the states chain. */ - + ns->stateidx += 1; ns->state = ns->nxstate; ns->nxstate = ns->op[ns->stateidx + 1]; @@ -951,14 +951,14 @@ switch_state(struct nandsim *ns) switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); return; } - + } else { /* * We don't yet know which operation we perform. * Try to identify it. */ - /* + /* * The only event causing the switch_state function to * be called with yet unknown operation is new command. */ @@ -987,7 +987,7 @@ switch_state(struct nandsim *ns) */ u_char status = NS_STATUS_OK(ns); - + /* In case of data states, see if all bytes were input/output */ if ((ns->state & (STATE_DATAIN_MASK | STATE_DATAOUT_MASK)) && ns->regs.count != ns->regs.num) { @@ -995,17 +995,17 @@ switch_state(struct nandsim *ns) ns->regs.num - ns->regs.count); status = NS_STATUS_FAILED(ns); } - + NS_DBG("switch_state: operation complete, switch to STATE_READY state\n"); switch_to_ready_state(ns, status); return; } else if (ns->nxstate & (STATE_DATAIN_MASK | STATE_DATAOUT_MASK)) { - /* + /* * If the next state is data input/output, switch to it now */ - + ns->state = ns->nxstate; ns->nxstate = ns->op[++ns->stateidx + 1]; ns->regs.num = ns->regs.count = 0; @@ -1023,16 +1023,16 @@ switch_state(struct nandsim *ns) case STATE_DATAOUT: ns->regs.num = ns->geom.pgszoob - ns->regs.off - ns->regs.column; break; - + case STATE_DATAOUT_ID: ns->regs.num = ns->geom.idbytes; break; - + case STATE_DATAOUT_STATUS: case STATE_DATAOUT_STATUS_M: ns->regs.count = ns->regs.num = 0; break; - + default: NS_ERR("switch_state: BUG! unknown data state\n"); } @@ -1044,16 +1044,16 @@ switch_state(struct nandsim *ns) */ ns->regs.count = 0; - + switch (NS_STATE(ns->nxstate)) { case STATE_ADDR_PAGE: ns->regs.num = ns->geom.pgaddrbytes; - + break; case STATE_ADDR_SEC: ns->regs.num = ns->geom.secaddrbytes; break; - + case STATE_ADDR_ZERO: ns->regs.num = 1; break; @@ -1062,7 +1062,7 @@ switch_state(struct nandsim *ns) NS_ERR("switch_state: BUG! unknown address state\n"); } } else { - /* + /* * Just reset internal counters. */ @@ -1184,7 +1184,7 @@ ns_nand_read_byte(struct mtd_info *mtd) default: BUG(); } - + if (ns->regs.count == ns->regs.num) { NS_DBG("read_byte: all bytes were read\n"); @@ -1201,9 +1201,9 @@ ns_nand_read_byte(struct mtd_info *mtd) } else if (NS_STATE(ns->nxstate) == STATE_READY) switch_state(ns); - + } - + return outb; } @@ -1211,7 +1211,7 @@ static void ns_nand_write_byte(struct mtd_info *mtd, u_char byte) { struct nandsim *ns = (struct nandsim *)((struct nand_chip *)mtd->priv)->priv; - + /* Sanity and correctness checks */ if (!ns->lines.ce) { NS_ERR("write_byte: chip is disabled, ignore write\n"); @@ -1221,7 +1221,7 @@ ns_nand_write_byte(struct mtd_info *mtd, u_char byte) NS_ERR("write_byte: ALE and CLE pins are high simultaneously, ignore write\n"); return; } - + if (ns->lines.cle == 1) { /* * The byte written is a command. @@ -1233,7 +1233,7 @@ ns_nand_write_byte(struct mtd_info *mtd, u_char byte) return; } - /* + /* * Chip might still be in STATE_DATAOUT * (if OPT_AUTOINCR feature is supported), STATE_DATAOUT_STATUS or * STATE_DATAOUT_STATUS_M state. If so, switch state. @@ -1254,13 +1254,13 @@ ns_nand_write_byte(struct mtd_info *mtd, u_char byte) "ignore previous states\n", (uint)byte, get_state_name(ns->nxstate)); switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); } - + /* Check that the command byte is correct */ if (check_command(byte)) { NS_ERR("write_byte: unknown command %#x\n", (uint)byte); return; } - + NS_DBG("command byte corresponding to %s state accepted\n", get_state_name(get_state_by_command(byte))); ns->regs.command = byte; @@ -1277,12 +1277,12 @@ ns_nand_write_byte(struct mtd_info *mtd, u_char byte) if (find_operation(ns, 1) < 0) return; - + if ((ns->state & ACTION_MASK) && do_state_action(ns, ns->state) < 0) { switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); return; } - + ns->regs.count = 0; switch (NS_STATE(ns->nxstate)) { case STATE_ADDR_PAGE: @@ -1306,7 +1306,7 @@ ns_nand_write_byte(struct mtd_info *mtd, u_char byte) switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); return; } - + /* Check if this is expected byte */ if (ns->regs.count == ns->regs.num) { NS_ERR("write_byte: no more address bytes expected\n"); @@ -1325,12 +1325,12 @@ ns_nand_write_byte(struct mtd_info *mtd, u_char byte) NS_DBG("address (%#x, %#x) is accepted\n", ns->regs.row, ns->regs.column); switch_state(ns); } - + } else { /* * The byte written is an input data. */ - + /* Check that chip is expecting data input */ if (!(ns->state & STATE_DATAIN_MASK)) { NS_ERR("write_byte: data input (%#x) isn't expected, state is %s, " @@ -1372,7 +1372,7 @@ ns_nand_read_word(struct mtd_info *mtd) struct nand_chip *chip = (struct nand_chip *)mtd->priv; NS_DBG("read_word\n"); - + return chip->read_byte(mtd) | (chip->read_byte(mtd) << 8); } @@ -1380,14 +1380,14 @@ static void ns_nand_write_word(struct mtd_info *mtd, uint16_t word) { struct nand_chip *chip = (struct nand_chip *)mtd->priv; - + NS_DBG("write_word\n"); - + chip->write_byte(mtd, word & 0xFF); chip->write_byte(mtd, word >> 8); } -static void +static void ns_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len) { struct nandsim *ns = (struct nandsim *)((struct nand_chip *)mtd->priv)->priv; @@ -1409,13 +1409,13 @@ ns_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len) memcpy(ns->buf.byte + ns->regs.count, buf, len); ns->regs.count += len; - + if (ns->regs.count == ns->regs.num) { NS_DBG("write_buf: %d bytes were written\n", ns->regs.count); } } -static void +static void ns_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) { struct nandsim *ns = (struct nandsim *)((struct nand_chip *)mtd->priv)->priv; @@ -1453,7 +1453,7 @@ ns_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) memcpy(buf, ns->buf.byte + ns->regs.count, len); ns->regs.count += len; - + if (ns->regs.count == ns->regs.num) { if ((ns->options & OPT_AUTOINCR) && NS_STATE(ns->state) == STATE_DATAOUT) { ns->regs.count = 0; @@ -1465,11 +1465,11 @@ ns_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) else if (NS_STATE(ns->nxstate) == STATE_READY) switch_state(ns); } - + return; } -static int +static int ns_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len) { ns_nand_read_buf(mtd, (u_char *)&ns_verify_buf[0], len); @@ -1486,7 +1486,7 @@ ns_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len) /* * Module initialization function */ -int __init ns_init_module(void) +static int __init ns_init_module(void) { struct nand_chip *chip; struct nandsim *nand; @@ -1496,7 +1496,7 @@ int __init ns_init_module(void) NS_ERR("wrong bus width (%d), use only 8 or 16\n", bus_width); return -EINVAL; } - + /* Allocate and initialize mtd_info, nand_chip and nandsim structures */ nsmtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip) + sizeof(struct nandsim), GFP_KERNEL); @@ -1509,7 +1509,7 @@ int __init ns_init_module(void) chip = (struct nand_chip *)(nsmtd + 1); nsmtd->priv = (void *)chip; nand = (struct nandsim *)(chip + 1); - chip->priv = (void *)nand; + chip->priv = (void *)nand; /* * Register simulator's callbacks. @@ -1526,9 +1526,9 @@ int __init ns_init_module(void) chip->eccmode = NAND_ECC_SOFT; chip->options |= NAND_SKIP_BBTSCAN; - /* + /* * Perform minimum nandsim structure initialization to handle - * the initial ID read command correctly + * the initial ID read command correctly */ if (third_id_byte != 0xFF || fourth_id_byte != 0xFF) nand->geom.idbytes = 4; @@ -1557,7 +1557,7 @@ int __init ns_init_module(void) NS_ERR("scan_bbt: can't initialize the nandsim structure\n"); goto error; } - + if ((retval = nand_default_bbt(nsmtd)) != 0) { free_nandsim(nand); goto error; |