diff options
Diffstat (limited to 'drivers/mtd/nand/pxa3xx_nand.c')
| -rw-r--r-- | drivers/mtd/nand/pxa3xx_nand.c | 471 |
1 files changed, 291 insertions, 180 deletions
diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c index 1fb3b3a80581..9eb7f879969e 100644 --- a/drivers/mtd/nand/pxa3xx_nand.c +++ b/drivers/mtd/nand/pxa3xx_nand.c @@ -110,6 +110,7 @@ enum { enum { STATE_IDLE = 0, + STATE_PREPARED, STATE_CMD_HANDLE, STATE_DMA_READING, STATE_DMA_WRITING, @@ -120,21 +121,40 @@ enum { STATE_READY, }; -struct pxa3xx_nand_info { - struct nand_chip nand_chip; +struct pxa3xx_nand_host { + struct nand_chip chip; + struct pxa3xx_nand_cmdset *cmdset; + struct mtd_info *mtd; + void *info_data; + + /* page size of attached chip */ + unsigned int page_size; + int use_ecc; + int cs; + /* calculated from pxa3xx_nand_flash data */ + unsigned int col_addr_cycles; + unsigned int row_addr_cycles; + size_t read_id_bytes; + + /* cached register value */ + uint32_t reg_ndcr; + uint32_t ndtr0cs0; + uint32_t ndtr1cs0; +}; + +struct pxa3xx_nand_info { struct nand_hw_control controller; struct platform_device *pdev; - struct pxa3xx_nand_cmdset *cmdset; struct clk *clk; void __iomem *mmio_base; unsigned long mmio_phys; + struct completion cmd_complete; unsigned int buf_start; unsigned int buf_count; - struct mtd_info *mtd; /* DMA information */ int drcmr_dat; int drcmr_cmd; @@ -142,44 +162,27 @@ struct pxa3xx_nand_info { unsigned char *data_buff; unsigned char *oob_buff; dma_addr_t data_buff_phys; - size_t data_buff_size; int data_dma_ch; struct pxa_dma_desc *data_desc; dma_addr_t data_desc_addr; - uint32_t reg_ndcr; - - /* saved column/page_addr during CMD_SEQIN */ - int seqin_column; - int seqin_page_addr; - - /* relate to the command */ + struct pxa3xx_nand_host *host[NUM_CHIP_SELECT]; unsigned int state; + int cs; int use_ecc; /* use HW ECC ? */ int use_dma; /* use DMA ? */ int is_ready; unsigned int page_size; /* page size of attached chip */ unsigned int data_size; /* data size in FIFO */ + unsigned int oob_size; int retcode; - struct completion cmd_complete; /* generated NDCBx register values */ uint32_t ndcb0; uint32_t ndcb1; uint32_t ndcb2; - - /* timing calcuted from setting */ - uint32_t ndtr0cs0; - uint32_t ndtr1cs0; - - /* calculated from pxa3xx_nand_flash data */ - size_t oob_size; - size_t read_id_bytes; - - unsigned int col_addr_cycles; - unsigned int row_addr_cycles; }; static int use_dma = 1; @@ -225,7 +228,7 @@ static struct pxa3xx_nand_flash builtin_flash_types[] = { /* Define a default flash type setting serve as flash detecting only */ #define DEFAULT_FLASH_TYPE (&builtin_flash_types[0]) -const char *mtd_names[] = {"pxa3xx_nand-0", NULL}; +const char *mtd_names[] = {"pxa3xx_nand-0", "pxa3xx_nand-1", NULL}; #define NDTR0_tCH(c) (min((c), 7) << 19) #define NDTR0_tCS(c) (min((c), 7) << 16) @@ -241,9 +244,10 @@ const char *mtd_names[] = {"pxa3xx_nand-0", NULL}; /* convert nano-seconds to nand flash controller clock cycles */ #define ns2cycle(ns, clk) (int)((ns) * (clk / 1000000) / 1000) -static void pxa3xx_nand_set_timing(struct pxa3xx_nand_info *info, +static void pxa3xx_nand_set_timing(struct pxa3xx_nand_host *host, const struct pxa3xx_nand_timing *t) { + struct pxa3xx_nand_info *info = host->info_data; unsigned long nand_clk = clk_get_rate(info->clk); uint32_t ndtr0, ndtr1; @@ -258,23 +262,24 @@ static void pxa3xx_nand_set_timing(struct pxa3xx_nand_info *info, NDTR1_tWHR(ns2cycle(t->tWHR, nand_clk)) | NDTR1_tAR(ns2cycle(t->tAR, nand_clk)); - info->ndtr0cs0 = ndtr0; - info->ndtr1cs0 = ndtr1; + host->ndtr0cs0 = ndtr0; + host->ndtr1cs0 = ndtr1; nand_writel(info, NDTR0CS0, ndtr0); nand_writel(info, NDTR1CS0, ndtr1); } static void pxa3xx_set_datasize(struct pxa3xx_nand_info *info) { - int oob_enable = info->reg_ndcr & NDCR_SPARE_EN; + struct pxa3xx_nand_host *host = info->host[info->cs]; + int oob_enable = host->reg_ndcr & NDCR_SPARE_EN; - info->data_size = info->page_size; + info->data_size = host->page_size; if (!oob_enable) { info->oob_size = 0; return; } - switch (info->page_size) { + switch (host->page_size) { case 2048: info->oob_size = (info->use_ecc) ? 40 : 64; break; @@ -292,9 +297,10 @@ static void pxa3xx_set_datasize(struct pxa3xx_nand_info *info) */ static void pxa3xx_nand_start(struct pxa3xx_nand_info *info) { + struct pxa3xx_nand_host *host = info->host[info->cs]; uint32_t ndcr; - ndcr = info->reg_ndcr; + ndcr = host->reg_ndcr; ndcr |= info->use_ecc ? NDCR_ECC_EN : 0; ndcr |= info->use_dma ? NDCR_DMA_EN : 0; ndcr |= NDCR_ND_RUN; @@ -359,7 +365,7 @@ static void handle_data_pio(struct pxa3xx_nand_info *info) DIV_ROUND_UP(info->oob_size, 4)); break; default: - printk(KERN_ERR "%s: invalid state %d\n", __func__, + dev_err(&info->pdev->dev, "%s: invalid state %d\n", __func__, info->state); BUG(); } @@ -385,7 +391,7 @@ static void start_data_dma(struct pxa3xx_nand_info *info) desc->dcmd |= DCMD_INCTRGADDR | DCMD_FLOWSRC; break; default: - printk(KERN_ERR "%s: invalid state %d\n", __func__, + dev_err(&info->pdev->dev, "%s: invalid state %d\n", __func__, info->state); BUG(); } @@ -416,6 +422,15 @@ static irqreturn_t pxa3xx_nand_irq(int irq, void *devid) { struct pxa3xx_nand_info *info = devid; unsigned int status, is_completed = 0; + unsigned int ready, cmd_done; + + if (info->cs == 0) { + ready = NDSR_FLASH_RDY; + cmd_done = NDSR_CS0_CMDD; + } else { + ready = NDSR_RDY; + cmd_done = NDSR_CS1_CMDD; + } status = nand_readl(info, NDSR); @@ -437,11 +452,11 @@ static irqreturn_t pxa3xx_nand_irq(int irq, void *devid) handle_data_pio(info); } } - if (status & NDSR_CS0_CMDD) { + if (status & cmd_done) { info->state = STATE_CMD_DONE; is_completed = 1; } - if (status & NDSR_FLASH_RDY) { + if (status & ready) { info->is_ready = 1; info->state = STATE_READY; } @@ -463,12 +478,6 @@ NORMAL_IRQ_EXIT: return IRQ_HANDLED; } -static int pxa3xx_nand_dev_ready(struct mtd_info *mtd) -{ - struct pxa3xx_nand_info *info = mtd->priv; - return (nand_readl(info, NDSR) & NDSR_RDY) ? 1 : 0; -} - static inline int is_buf_blank(uint8_t *buf, size_t len) { for (; len > 0; len--) @@ -481,10 +490,12 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command, uint16_t column, int page_addr) { uint16_t cmd; - int addr_cycle, exec_cmd, ndcb0; - struct mtd_info *mtd = info->mtd; + int addr_cycle, exec_cmd; + struct pxa3xx_nand_host *host; + struct mtd_info *mtd; - ndcb0 = 0; + host = info->host[info->cs]; + mtd = host->mtd; addr_cycle = 0; exec_cmd = 1; @@ -495,6 +506,10 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command, info->use_ecc = 0; info->is_ready = 0; info->retcode = ERR_NONE; + if (info->cs != 0) + info->ndcb0 = NDCB0_CSEL; + else + info->ndcb0 = 0; switch (command) { case NAND_CMD_READ0: @@ -512,20 +527,19 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command, break; } - info->ndcb0 = ndcb0; - addr_cycle = NDCB0_ADDR_CYC(info->row_addr_cycles - + info->col_addr_cycles); + addr_cycle = NDCB0_ADDR_CYC(host->row_addr_cycles + + host->col_addr_cycles); switch (command) { case NAND_CMD_READOOB: case NAND_CMD_READ0: - cmd = info->cmdset->read1; + cmd = host->cmdset->read1; if (command == NAND_CMD_READOOB) info->buf_start = mtd->writesize + column; else info->buf_start = column; - if (unlikely(info->page_size < PAGE_CHUNK_SIZE)) + if (unlikely(host->page_size < PAGE_CHUNK_SIZE)) info->ndcb0 |= NDCB0_CMD_TYPE(0) | addr_cycle | (cmd & NDCB0_CMD1_MASK); @@ -537,7 +551,7 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command, case NAND_CMD_SEQIN: /* small page addr setting */ - if (unlikely(info->page_size < PAGE_CHUNK_SIZE)) { + if (unlikely(host->page_size < PAGE_CHUNK_SIZE)) { info->ndcb1 = ((page_addr & 0xFFFFFF) << 8) | (column & 0xFF); @@ -564,7 +578,7 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command, break; } - cmd = info->cmdset->program; + cmd = host->cmdset->program; info->ndcb0 |= NDCB0_CMD_TYPE(0x1) | NDCB0_AUTO_RS | NDCB0_ST_ROW_EN @@ -574,8 +588,8 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command, break; case NAND_CMD_READID: - cmd = info->cmdset->read_id; - info->buf_count = info->read_id_bytes; + cmd = host->cmdset->read_id; + info->buf_count = host->read_id_bytes; info->ndcb0 |= NDCB0_CMD_TYPE(3) | NDCB0_ADDR_CYC(1) | cmd; @@ -583,7 +597,7 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command, info->data_size = 8; break; case NAND_CMD_STATUS: - cmd = info->cmdset->read_status; + cmd = host->cmdset->read_status; info->buf_count = 1; info->ndcb0 |= NDCB0_CMD_TYPE(4) | NDCB0_ADDR_CYC(1) @@ -593,7 +607,7 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command, break; case NAND_CMD_ERASE1: - cmd = info->cmdset->erase; + cmd = host->cmdset->erase; info->ndcb0 |= NDCB0_CMD_TYPE(2) | NDCB0_AUTO_RS | NDCB0_ADDR_CYC(3) @@ -604,7 +618,7 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command, break; case NAND_CMD_RESET: - cmd = info->cmdset->reset; + cmd = host->cmdset->reset; info->ndcb0 |= NDCB0_CMD_TYPE(5) | cmd; @@ -616,8 +630,8 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command, default: exec_cmd = 0; - printk(KERN_ERR "pxa3xx-nand: non-supported" - " command %x\n", command); + dev_err(&info->pdev->dev, "non-supported command %x\n", + command); break; } @@ -627,7 +641,8 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command, static void pxa3xx_nand_cmdfunc(struct mtd_info *mtd, unsigned command, int column, int page_addr) { - struct pxa3xx_nand_info *info = mtd->priv; + struct pxa3xx_nand_host *host = mtd->priv; + struct pxa3xx_nand_info *info = host->info_data; int ret, exec_cmd; /* @@ -635,9 +650,21 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info *mtd, unsigned command, * "byte" address into a "word" address appropriate * for indexing a word-oriented device */ - if (info->reg_ndcr & NDCR_DWIDTH_M) + if (host->reg_ndcr & NDCR_DWIDTH_M) column /= 2; + /* + * There may be different NAND chip hooked to + * different chip select, so check whether + * chip select has been changed, if yes, reset the timing + */ + if (info->cs != host->cs) { + info->cs = host->cs; + nand_writel(info, NDTR0CS0, host->ndtr0cs0); + nand_writel(info, NDTR1CS0, host->ndtr1cs0); + } + + info->state = STATE_PREPARED; exec_cmd = prepare_command_pool(info, command, column, page_addr); if (exec_cmd) { init_completion(&info->cmd_complete); @@ -646,12 +673,12 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info *mtd, unsigned command, ret = wait_for_completion_timeout(&info->cmd_complete, CHIP_DELAY_TIMEOUT); if (!ret) { - printk(KERN_ERR "Wait time out!!!\n"); + dev_err(&info->pdev->dev, "Wait time out!!!\n"); /* Stop State Machine for next command cycle */ pxa3xx_nand_stop(info); } - info->state = STATE_IDLE; } + info->state = STATE_IDLE; } static void pxa3xx_nand_write_page_hwecc(struct mtd_info *mtd, @@ -664,7 +691,8 @@ static void pxa3xx_nand_write_page_hwecc(struct mtd_info *mtd, static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip, uint8_t *buf, int page) { - struct pxa3xx_nand_info *info = mtd->priv; + struct pxa3xx_nand_host *host = mtd->priv; + struct pxa3xx_nand_info *info = host->info_data; chip->read_buf(mtd, buf, mtd->writesize); chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); @@ -685,6 +713,8 @@ static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd, * OOB, ignore such double bit errors */ if (is_buf_blank(buf, mtd->writesize)) + info->retcode = ERR_NONE; + else mtd->ecc_stats.failed++; } @@ -693,7 +723,8 @@ static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd, static uint8_t pxa3xx_nand_read_byte(struct mtd_info *mtd) { - struct pxa3xx_nand_info *info = mtd->priv; + struct pxa3xx_nand_host *host = mtd->priv; + struct pxa3xx_nand_info *info = host->info_data; char retval = 0xFF; if (info->buf_start < info->buf_count) @@ -705,7 +736,8 @@ static uint8_t pxa3xx_nand_read_byte(struct mtd_info *mtd) static u16 pxa3xx_nand_read_word(struct mtd_info *mtd) { - struct pxa3xx_nand_info *info = mtd->priv; + struct pxa3xx_nand_host *host = mtd->priv; + struct pxa3xx_nand_info *info = host->info_data; u16 retval = 0xFFFF; if (!(info->buf_start & 0x01) && info->buf_start < info->buf_count) { @@ -717,7 +749,8 @@ static u16 pxa3xx_nand_read_word(struct mtd_info *mtd) static void pxa3xx_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) { - struct pxa3xx_nand_info *info = mtd->priv; + struct pxa3xx_nand_host *host = mtd->priv; + struct pxa3xx_nand_info *info = host->info_data; int real_len = min_t(size_t, len, info->buf_count - info->buf_start); memcpy(buf, info->data_buff + info->buf_start, real_len); @@ -727,7 +760,8 @@ static void pxa3xx_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) static void pxa3xx_nand_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) { - struct pxa3xx_nand_info *info = mtd->priv; + struct pxa3xx_nand_host *host = mtd->priv; + struct pxa3xx_nand_info *info = host->info_data; int real_len = min_t(size_t, len, info->buf_count - info->buf_start); memcpy(info->data_buff + info->buf_start, buf, real_len); @@ -747,7 +781,8 @@ static void pxa3xx_nand_select_chip(struct mtd_info *mtd, int chip) static int pxa3xx_nand_waitfunc(struct mtd_info *mtd, struct nand_chip *this) { - struct pxa3xx_nand_info *info = mtd->priv; + struct pxa3xx_nand_host *host = mtd->priv; + struct pxa3xx_nand_info *info = host->info_data; /* pxa3xx_nand_send_command has waited for command complete */ if (this->state == FL_WRITING || this->state == FL_ERASING) { @@ -770,54 +805,70 @@ static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info, { struct platform_device *pdev = info->pdev; struct pxa3xx_nand_platform_data *pdata = pdev->dev.platform_data; + struct pxa3xx_nand_host *host = info->host[info->cs]; uint32_t ndcr = 0x0; /* enable all interrupts */ - if (f->page_size != 2048 && f->page_size != 512) + if (f->page_size != 2048 && f->page_size != 512) { + dev_err(&pdev->dev, "Current only support 2048 and 512 size\n"); return -EINVAL; + } - if (f->flash_width != 16 && f->flash_width != 8) + if (f->flash_width != 16 && f->flash_width != 8) { + dev_err(&pdev->dev, "Only support 8bit and 16 bit!\n"); return -EINVAL; + } /* calculate flash information */ - info->cmdset = &default_cmdset; - info->page_size = f->page_size; - info->read_id_bytes = (f->page_size == 2048) ? 4 : 2; + host->cmdset = &default_cmdset; + host->page_size = f->page_size; + host->read_id_bytes = (f->page_size == 2048) ? 4 : 2; /* calculate addressing information */ - info->col_addr_cycles = (f->page_size == 2048) ? 2 : 1; + host->col_addr_cycles = (f->page_size == 2048) ? 2 : 1; if (f->num_blocks * f->page_per_block > 65536) - info->row_addr_cycles = 3; + host->row_addr_cycles = 3; else - info->row_addr_cycles = 2; + host->row_addr_cycles = 2; ndcr |= (pdata->enable_arbiter) ? NDCR_ND_ARB_EN : 0; - ndcr |= (info->col_addr_cycles == 2) ? NDCR_RA_START : 0; + ndcr |= (host->col_addr_cycles == 2) ? NDCR_RA_START : 0; ndcr |= (f->page_per_block == 64) ? NDCR_PG_PER_BLK : 0; ndcr |= (f->page_size == 2048) ? NDCR_PAGE_SZ : 0; ndcr |= (f->flash_width == 16) ? NDCR_DWIDTH_M : 0; ndcr |= (f->dfc_width == 16) ? NDCR_DWIDTH_C : 0; - ndcr |= NDCR_RD_ID_CNT(info->read_id_bytes); + ndcr |= NDCR_RD_ID_CNT(host->read_id_bytes); ndcr |= NDCR_SPARE_EN; /* enable spare by default */ - info->reg_ndcr = ndcr; + host->reg_ndcr = ndcr; - pxa3xx_nand_set_timing(info, f->timing); + pxa3xx_nand_set_timing(host, f->timing); return 0; } static int pxa3xx_nand_detect_config(struct pxa3xx_nand_info *info) { + /* + * We set 0 by hard coding here, for we don't support keep_config + * when there is more than one chip attached to the controller + */ + struct pxa3xx_nand_host *host = info->host[0]; uint32_t ndcr = nand_readl(info, NDCR); - info->page_size = ndcr & NDCR_PAGE_SZ ? 2048 : 512; - /* set info fields needed to read id */ - info->read_id_bytes = (info->page_size == 2048) ? 4 : 2; - info->reg_ndcr = ndcr; - info->cmdset = &default_cmdset; - info->ndtr0cs0 = nand_readl(info, NDTR0CS0); - info->ndtr1cs0 = nand_readl(info, NDTR1CS0); + if (ndcr & NDCR_PAGE_SZ) { + host->page_size = 2048; + host->read_id_bytes = 4; + } else { + host->page_size = 512; + host->read_id_bytes = 2; + } + + host->reg_ndcr = ndcr & ~NDCR_INT_MASK; + host->cmdset = &default_cmdset; + + host->ndtr0cs0 = nand_readl(info, NDTR0CS0); + host->ndtr1cs0 = nand_readl(info, NDTR1CS0); return 0; } @@ -847,7 +898,6 @@ static int pxa3xx_nand_init_buff(struct pxa3xx_nand_info *info) return -ENOMEM; } - info->data_buff_size = MAX_BUFF_SIZE; info->data_desc = (void *)info->data_buff + data_desc_offset; info->data_desc_addr = info->data_buff_phys + data_desc_offset; @@ -855,7 +905,7 @@ static int pxa3xx_nand_init_buff(struct pxa3xx_nand_info *info) pxa3xx_nand_data_dma_irq, info); if (info->data_dma_ch < 0) { dev_err(&pdev->dev, "failed to request data dma\n"); - dma_free_coherent(&pdev->dev, info->data_buff_size, + dma_free_coherent(&pdev->dev, MAX_BUFF_SIZE, info->data_buff, info->data_buff_phys); return info->data_dma_ch; } @@ -865,24 +915,28 @@ static int pxa3xx_nand_init_buff(struct pxa3xx_nand_info *info) static int pxa3xx_nand_sensing(struct pxa3xx_nand_info *info) { - struct mtd_info *mtd = info->mtd; - struct nand_chip *chip = mtd->priv; - + struct mtd_info *mtd; + int ret; + mtd = info->host[info->cs]->mtd; /* use the common timing to make a try */ - pxa3xx_nand_config_flash(info, &builtin_flash_types[0]); - chip->cmdfunc(mtd, NAND_CMD_RESET, 0, 0); + ret = pxa3xx_nand_config_flash(info, &builtin_flash_types[0]); + if (ret) + return ret; + + pxa3xx_nand_cmdfunc(mtd, NAND_CMD_RESET, 0, 0); if (info->is_ready) - return 1; - else return 0; + + return -ENODEV; } static int pxa3xx_nand_scan(struct mtd_info *mtd) { - struct pxa3xx_nand_info *info = mtd->priv; + struct pxa3xx_nand_host *host = mtd->priv; + struct pxa3xx_nand_info *info = host->info_data; struct platform_device *pdev = info->pdev; struct pxa3xx_nand_platform_data *pdata = pdev->dev.platform_data; - struct nand_flash_dev pxa3xx_flash_ids[2] = { {NULL,}, {NULL,} }; + struct nand_flash_dev pxa3xx_flash_ids[2], *def = NULL; const struct pxa3xx_nand_flash *f = NULL; struct nand_chip *chip = mtd->priv; uint32_t id = -1; @@ -893,22 +947,20 @@ static int pxa3xx_nand_scan(struct mtd_info *mtd) goto KEEP_CONFIG; ret = pxa3xx_nand_sensing(info); - if (!ret) { - kfree(mtd); - info->mtd = NULL; - printk(KERN_INFO "There is no nand chip on cs 0!\n"); + if (ret) { + dev_info(&info->pdev->dev, "There is no chip on cs %d!\n", + info->cs); - return -EINVAL; + return ret; } chip->cmdfunc(mtd, NAND_CMD_READID, 0, 0); id = *((uint16_t *)(info->data_buff)); if (id != 0) - printk(KERN_INFO "Detect a flash id %x\n", id); + dev_info(&info->pdev->dev, "Detect a flash id %x\n", id); else { - kfree(mtd); - info->mtd = NULL; - printk(KERN_WARNING "Read out ID 0, potential timing set wrong!!\n"); + dev_warn(&info->pdev->dev, + "Read out ID 0, potential timing set wrong!!\n"); return -EINVAL; } @@ -926,14 +978,17 @@ static int pxa3xx_nand_scan(struct mtd_info *mtd) } if (i >= (ARRAY_SIZE(builtin_flash_types) + pdata->num_flash - 1)) { - kfree(mtd); - info->mtd = NULL; - printk(KERN_ERR "ERROR!! flash not defined!!!\n"); + dev_err(&info->pdev->dev, "ERROR!! flash not defined!!!\n"); return -EINVAL; } - pxa3xx_nand_config_flash(info, f); + ret = pxa3xx_nand_config_flash(info, f); + if (ret) { + dev_err(&info->pdev->dev, "ERROR! Configure failed\n"); + return ret; + } + pxa3xx_flash_ids[0].name = f->name; pxa3xx_flash_ids[0].id = (f->chip_id >> 8) & 0xffff; pxa3xx_flash_ids[0].pagesize = f->page_size; @@ -942,62 +997,78 @@ static int pxa3xx_nand_scan(struct mtd_info *mtd) pxa3xx_flash_ids[0].erasesize = f->page_size * f->page_per_block; if (f->flash_width == 16) pxa3xx_flash_ids[0].options = NAND_BUSWIDTH_16; + pxa3xx_flash_ids[1].name = NULL; + def = pxa3xx_flash_ids; KEEP_CONFIG: - if (nand_scan_ident(mtd, 1, pxa3xx_flash_ids)) + chip->ecc.mode = NAND_ECC_HW; + chip->ecc.size = host->page_size; + + chip->options = NAND_NO_AUTOINCR; + chip->options |= NAND_NO_READRDY; + if (host->reg_ndcr & NDCR_DWIDTH_M) + chip->options |= NAND_BUSWIDTH_16; + + if (nand_scan_ident(mtd, 1, def)) return -ENODEV; /* calculate addressing information */ - info->col_addr_cycles = (mtd->writesize >= 2048) ? 2 : 1; + if (mtd->writesize >= 2048) + host->col_addr_cycles = 2; + else + host->col_addr_cycles = 1; + info->oob_buff = info->data_buff + mtd->writesize; if ((mtd->size >> chip->page_shift) > 65536) - info->row_addr_cycles = 3; + host->row_addr_cycles = 3; else - info->row_addr_cycles = 2; - mtd->name = mtd_names[0]; - chip->ecc.mode = NAND_ECC_HW; - chip->ecc.size = f->page_size; - - chip->options = (f->flash_width == 16) ? NAND_BUSWIDTH_16 : 0; - chip->options |= NAND_NO_AUTOINCR; - chip->options |= NAND_NO_READRDY; + host->row_addr_cycles = 2; + mtd->name = mtd_names[0]; return nand_scan_tail(mtd); } -static -struct pxa3xx_nand_info *alloc_nand_resource(struct platform_device *pdev) +static int alloc_nand_resource(struct platform_device *pdev) { + struct pxa3xx_nand_platform_data *pdata; struct pxa3xx_nand_info *info; + struct pxa3xx_nand_host *host; struct nand_chip *chip; struct mtd_info *mtd; struct resource *r; - int ret, irq; + int ret, irq, cs; - mtd = kzalloc(sizeof(struct mtd_info) + sizeof(struct pxa3xx_nand_info), - GFP_KERNEL); - if (!mtd) { + pdata = pdev->dev.platform_data; + info = kzalloc(sizeof(*info) + (sizeof(*mtd) + + sizeof(*host)) * pdata->num_cs, GFP_KERNEL); + if (!info) { dev_err(&pdev->dev, "failed to allocate memory\n"); - return NULL; + return -ENOMEM; } - info = (struct pxa3xx_nand_info *)(&mtd[1]); - chip = (struct nand_chip *)(&mtd[1]); info->pdev = pdev; - info->mtd = mtd; - mtd->priv = info; - mtd->owner = THIS_MODULE; - - chip->ecc.read_page = pxa3xx_nand_read_page_hwecc; - chip->ecc.write_page = pxa3xx_nand_write_page_hwecc; - chip->controller = &info->controller; - chip->waitfunc = pxa3xx_nand_waitfunc; - chip->select_chip = pxa3xx_nand_select_chip; - chip->dev_ready = pxa3xx_nand_dev_ready; - chip->cmdfunc = pxa3xx_nand_cmdfunc; - chip->read_word = pxa3xx_nand_read_word; - chip->read_byte = pxa3xx_nand_read_byte; - chip->read_buf = pxa3xx_nand_read_buf; - chip->write_buf = pxa3xx_nand_write_buf; - chip->verify_buf = pxa3xx_nand_verify_buf; + for (cs = 0; cs < pdata->num_cs; cs++) { + mtd = (struct mtd_info *)((unsigned int)&info[1] + + (sizeof(*mtd) + sizeof(*host)) * cs); + chip = (struct nand_chip *)(&mtd[1]); + host = (struct pxa3xx_nand_host *)chip; + info->host[cs] = host; + host->mtd = mtd; + host->cs = cs; + host->info_data = info; + mtd->priv = host; + mtd->owner = THIS_MODULE; + + chip->ecc.read_page = pxa3xx_nand_read_page_hwecc; + chip->ecc.write_page = pxa3xx_nand_write_page_hwecc; + chip->controller = &info->controller; + chip->waitfunc = pxa3xx_nand_waitfunc; + chip->select_chip = pxa3xx_nand_select_chip; + chip->cmdfunc = pxa3xx_nand_cmdfunc; + chip->read_word = pxa3xx_nand_read_word; + chip->read_byte = pxa3xx_nand_read_byte; + chip->read_buf = pxa3xx_nand_read_buf; + chip->write_buf = pxa3xx_nand_write_buf; + chip->verify_buf = pxa3xx_nand_verify_buf; + } spin_lock_init(&chip->controller->lock); init_waitqueue_head(&chip->controller->wq); @@ -1070,13 +1141,13 @@ struct pxa3xx_nand_info *alloc_nand_resource(struct platform_device *pdev) platform_set_drvdata(pdev, info); - return info; + return 0; fail_free_buf: free_irq(irq, info); if (use_dma) { pxa_free_dma(info->data_dma_ch); - dma_free_coherent(&pdev->dev, info->data_buff_size, + dma_free_coherent(&pdev->dev, MAX_BUFF_SIZE, info->data_buff, info->data_buff_phys); } else kfree(info->data_buff); @@ -1088,17 +1159,21 @@ fail_put_clk: clk_disable(info->clk); clk_put(info->clk); fail_free_mtd: - kfree(mtd); - return NULL; + kfree(info); + return ret; } static int pxa3xx_nand_remove(struct platform_device *pdev) { struct pxa3xx_nand_info *info = platform_get_drvdata(pdev); - struct mtd_info *mtd = info->mtd; + struct pxa3xx_nand_platform_data *pdata; struct resource *r; - int irq; + int irq, cs; + if (!info) + return 0; + + pdata = pdev->dev.platform_data; platform_set_drvdata(pdev, NULL); irq = platform_get_irq(pdev, 0); @@ -1106,7 +1181,7 @@ static int pxa3xx_nand_remove(struct platform_device *pdev) free_irq(irq, info); if (use_dma) { pxa_free_dma(info->data_dma_ch); - dma_free_writecombine(&pdev->dev, info->data_buff_size, + dma_free_writecombine(&pdev->dev, MAX_BUFF_SIZE, info->data_buff, info->data_buff_phys); } else kfree(info->data_buff); @@ -1118,10 +1193,9 @@ static int pxa3xx_nand_remove(struct platform_device *pdev) clk_disable(info->clk); clk_put(info->clk); - if (mtd) { - mtd_device_unregister(mtd); - kfree(mtd); - } + for (cs = 0; cs < pdata->num_cs; cs++) + nand_release(info->host[cs]->mtd); + kfree(info); return 0; } @@ -1129,6 +1203,7 @@ static int pxa3xx_nand_probe(struct platform_device *pdev) { struct pxa3xx_nand_platform_data *pdata; struct pxa3xx_nand_info *info; + int ret, cs, probe_success; pdata = pdev->dev.platform_data; if (!pdata) { @@ -1136,52 +1211,88 @@ static int pxa3xx_nand_probe(struct platform_device *pdev) return -ENODEV; } - info = alloc_nand_resource(pdev); - if (info == NULL) - return -ENOMEM; - - if (pxa3xx_nand_scan(info->mtd)) { - dev_err(&pdev->dev, "failed to scan nand\n"); - pxa3xx_nand_remove(pdev); - return -ENODEV; + ret = alloc_nand_resource(pdev); + if (ret) { + dev_err(&pdev->dev, "alloc nand resource failed\n"); + return ret; } - if (mtd_has_cmdlinepart()) { - const char *probes[] = { "cmdlinepart", NULL }; - struct mtd_partition *parts; - int nr_parts; + info = platform_get_drvdata(pdev); + probe_success = 0; + for (cs = 0; cs < pdata->num_cs; cs++) { + info->cs = cs; + ret = pxa3xx_nand_scan(info->host[cs]->mtd); + if (ret) { + dev_warn(&pdev->dev, "failed to scan nand at cs %d\n", + cs); + continue; + } - nr_parts = parse_mtd_partitions(info->mtd, probes, &parts, 0); + ret = mtd_device_parse_register(info->host[cs]->mtd, NULL, 0, + pdata->parts[cs], pdata->nr_parts[cs]); + if (!ret) + probe_success = 1; + } - if (nr_parts) - return mtd_device_register(info->mtd, parts, nr_parts); + if (!probe_success) { + pxa3xx_nand_remove(pdev); + return -ENODEV; } - return mtd_device_register(info->mtd, pdata->parts, pdata->nr_parts); + return 0; } #ifdef CONFIG_PM static int pxa3xx_nand_suspend(struct platform_device *pdev, pm_message_t state) { struct pxa3xx_nand_info *info = platform_get_drvdata(pdev); - struct mtd_info *mtd = info->mtd; + struct pxa3xx_nand_platform_data *pdata; + struct mtd_info *mtd; + int cs; + pdata = pdev->dev.platform_data; if (info->state) { dev_err(&pdev->dev, "driver busy, state = %d\n", info->state); return -EAGAIN; } + for (cs = 0; cs < pdata->num_cs; cs++) { + mtd = info->host[cs]->mtd; + mtd->suspend(mtd); + } + return 0; } static int pxa3xx_nand_resume(struct platform_device *pdev) { struct pxa3xx_nand_info *info = platform_get_drvdata(pdev); - struct mtd_info *mtd = info->mtd; + struct pxa3xx_nand_platform_data *pdata; + struct mtd_info *mtd; + int cs; - nand_writel(info, NDTR0CS0, info->ndtr0cs0); - nand_writel(info, NDTR1CS0, info->ndtr1cs0); - clk_enable(info->clk); + pdata = pdev->dev.platform_data; + /* We don't want to handle interrupt without calling mtd routine */ + disable_int(info, NDCR_INT_MASK); + + /* + * Directly set the chip select to a invalid value, + * then the driver would reset the timing according + * to current chip select at the beginning of cmdfunc + */ + info->cs = 0xff; + + /* + * As the spec says, the NDSR would be updated to 0x1800 when + * doing the nand_clk disable/enable. + * To prevent it damaging state machine of the driver, clear + * all status before resume + */ + nand_writel(info, NDSR, NDSR_MASK); + for (cs = 0; cs < pdata->num_cs; cs++) { + mtd = info->host[cs]->mtd; + mtd->resume(mtd); + } return 0; } |
