From 43035338ad772b6a4097b2ac530b75390bee87c1 Mon Sep 17 00:00:00 2001 From: Enrico Scholz Date: Fri, 29 Aug 2008 12:57:28 +0200 Subject: [MTD] [NAND] pxa3xx_nand: moved nand definitions into shared platform header This patch moves the exported datastructures from the pxa3xx_nand.c driver into the header. This is a plain movement without any modification of the attributes. This is the first one of a set of patches which: * allows to specify used NAND flash in the platform code and allows to turn off the old way to specify NAND characteristics in the driver. This way did not worked well as these characteristics depend on the platform and can not be derived from NAND id alone. E.g. some NAND chips share the same ID (e.g. K9K8G08U0A and K9NBG08U5A) but have different timings (which are written in the common driver currently and must be modified there). * adds 'const' annotations at various places Further patches will be sent to the mtd-list. Signed-off-by: Enrico Scholz Signed-off-by: David Woodhouse --- arch/arm/mach-pxa/include/mach/pxa3xx_nand.h | 44 ++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) (limited to 'arch/arm/mach-pxa') diff --git a/arch/arm/mach-pxa/include/mach/pxa3xx_nand.h b/arch/arm/mach-pxa/include/mach/pxa3xx_nand.h index eb4b190b6657..0dc50d82ea73 100644 --- a/arch/arm/mach-pxa/include/mach/pxa3xx_nand.h +++ b/arch/arm/mach-pxa/include/mach/pxa3xx_nand.h @@ -4,6 +4,50 @@ #include #include +struct pxa3xx_nand_timing { + unsigned int tCH; /* Enable signal hold time */ + unsigned int tCS; /* Enable signal setup time */ + unsigned int tWH; /* ND_nWE high duration */ + unsigned int tWP; /* ND_nWE pulse time */ + unsigned int tRH; /* ND_nRE high duration */ + unsigned int tRP; /* ND_nRE pulse width */ + unsigned int tR; /* ND_nWE high to ND_nRE low for read */ + unsigned int tWHR; /* ND_nWE high to ND_nRE low for status read */ + unsigned int tAR; /* ND_ALE low to ND_nRE low delay */ +}; + +struct pxa3xx_nand_cmdset { + uint16_t read1; + uint16_t read2; + uint16_t program; + uint16_t read_status; + uint16_t read_id; + uint16_t erase; + uint16_t reset; + uint16_t lock; + uint16_t unlock; + uint16_t lock_status; +}; + +struct pxa3xx_nand_flash { + struct pxa3xx_nand_timing *timing; /* NAND Flash timing */ + struct pxa3xx_nand_cmdset *cmdset; + + uint32_t page_per_block;/* Pages per block (PG_PER_BLK) */ + uint32_t page_size; /* Page size in bytes (PAGE_SZ) */ + uint32_t flash_width; /* Width of Flash memory (DWIDTH_M) */ + uint32_t dfc_width; /* Width of flash controller(DWIDTH_C) */ + uint32_t num_blocks; /* Number of physical blocks in Flash */ + uint32_t chip_id; + + /* NOTE: these are automatically calculated, do not define */ + size_t oob_size; + size_t read_id_bytes; + + unsigned int col_addr_cycles; + unsigned int row_addr_cycles; +}; + struct pxa3xx_nand_platform_data { /* the data flash bus is shared between the Static Memory -- cgit v1.2.3 From c8ac3f818e1183eab8d08a41b01b6078c5df4b43 Mon Sep 17 00:00:00 2001 From: Enrico Scholz Date: Fri, 29 Aug 2008 12:59:48 +0200 Subject: [MTD] [NAND] pxa3xx_nand: allow to define flash types in the platform data This patch adds 'flash' and 'num_flash' attributes to the platform data. There was added code in the driver to iterate across these attributes in the detect-flash routine. This is done similarly to the existing method which uses a 'builtin_flash_types' field. Signed-off-by: Enrico Scholz Signed-off-by: David Woodhouse --- arch/arm/mach-pxa/include/mach/pxa3xx_nand.h | 3 +++ drivers/mtd/nand/pxa3xx_nand.c | 18 ++++++++++++++++-- 2 files changed, 19 insertions(+), 2 deletions(-) (limited to 'arch/arm/mach-pxa') diff --git a/arch/arm/mach-pxa/include/mach/pxa3xx_nand.h b/arch/arm/mach-pxa/include/mach/pxa3xx_nand.h index 0dc50d82ea73..6ac9aea0b0b5 100644 --- a/arch/arm/mach-pxa/include/mach/pxa3xx_nand.h +++ b/arch/arm/mach-pxa/include/mach/pxa3xx_nand.h @@ -58,6 +58,9 @@ struct pxa3xx_nand_platform_data { struct mtd_partition *parts; unsigned int nr_parts; + + struct pxa3xx_nand_flash * const flash; + size_t num_flash; }; extern void pxa3xx_set_nand_info(struct pxa3xx_nand_platform_data *info); diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c index 203e8efefb30..1906aba7e73c 100644 --- a/drivers/mtd/nand/pxa3xx_nand.c +++ b/drivers/mtd/nand/pxa3xx_nand.c @@ -911,12 +911,26 @@ static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info, return 0; } -static int pxa3xx_nand_detect_flash(struct pxa3xx_nand_info *info) +static int pxa3xx_nand_detect_flash(struct pxa3xx_nand_info *info, + const struct pxa3xx_nand_platform_data *pdata) { struct pxa3xx_nand_flash *f; uint32_t id; int i; + for (i = 0; inum_flash; ++i) { + f = pdata->flash + i; + + if (pxa3xx_nand_config_flash(info, f)) + continue; + + if (__readid(info, &id)) + continue; + + if (id == f->chip_id) + return 0; + } + for (i = 0; i < ARRAY_SIZE(builtin_flash_types); i++) { f = builtin_flash_types[i]; @@ -1114,7 +1128,7 @@ static int pxa3xx_nand_probe(struct platform_device *pdev) goto fail_free_buf; } - ret = pxa3xx_nand_detect_flash(info); + ret = pxa3xx_nand_detect_flash(info, pdata); if (ret) { dev_err(&pdev->dev, "failed to detect flash\n"); ret = -ENODEV; -- cgit v1.2.3 From 7dad482ed0648a40e403d1ed44e0ea92248632f1 Mon Sep 17 00:00:00 2001 From: Enrico Scholz Date: Fri, 29 Aug 2008 12:59:50 +0200 Subject: [MTD] [NAND] pxa3xx_nand: added some 'const' annotations to the exported API This patch marks some attributes as 'const' which are set only once and never be modified by the driver. There are some changes in parameter list and variable declarations too which mark them as 'const'. Signed-off-by: Enrico Scholz Signed-off-by: David Woodhouse --- arch/arm/mach-pxa/include/mach/pxa3xx_nand.h | 8 ++++---- drivers/mtd/nand/pxa3xx_nand.c | 10 +++++----- 2 files changed, 9 insertions(+), 9 deletions(-) (limited to 'arch/arm/mach-pxa') diff --git a/arch/arm/mach-pxa/include/mach/pxa3xx_nand.h b/arch/arm/mach-pxa/include/mach/pxa3xx_nand.h index 6ac9aea0b0b5..cfcb2e21aeeb 100644 --- a/arch/arm/mach-pxa/include/mach/pxa3xx_nand.h +++ b/arch/arm/mach-pxa/include/mach/pxa3xx_nand.h @@ -30,8 +30,8 @@ struct pxa3xx_nand_cmdset { }; struct pxa3xx_nand_flash { - struct pxa3xx_nand_timing *timing; /* NAND Flash timing */ - struct pxa3xx_nand_cmdset *cmdset; + const struct pxa3xx_nand_timing *timing; /* NAND Flash timing */ + const struct pxa3xx_nand_cmdset *cmdset; uint32_t page_per_block;/* Pages per block (PG_PER_BLK) */ uint32_t page_size; /* Page size in bytes (PAGE_SZ) */ @@ -56,8 +56,8 @@ struct pxa3xx_nand_platform_data { */ int enable_arbiter; - struct mtd_partition *parts; - unsigned int nr_parts; + const struct mtd_partition *parts; + unsigned int nr_parts; struct pxa3xx_nand_flash * const flash; size_t num_flash; diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c index e492804b3d98..af174054656e 100644 --- a/drivers/mtd/nand/pxa3xx_nand.c +++ b/drivers/mtd/nand/pxa3xx_nand.c @@ -293,7 +293,7 @@ static struct pxa3xx_nand_flash *builtin_flash_types[] = { #define ns2cycle(ns, clk) (int)(((ns) * (clk / 1000000) / 1000) + 1) static void pxa3xx_nand_set_timing(struct pxa3xx_nand_info *info, - struct pxa3xx_nand_timing *t) + const struct pxa3xx_nand_timing *t) { unsigned long nand_clk = clk_get_rate(info->clk); uint32_t ndtr0, ndtr1; @@ -336,7 +336,7 @@ static int prepare_read_prog_cmd(struct pxa3xx_nand_info *info, uint16_t cmd, int column, int page_addr) { struct pxa3xx_nand_flash *f = info->flash_info; - struct pxa3xx_nand_cmdset *cmdset = f->cmdset; + const struct pxa3xx_nand_cmdset *cmdset = f->cmdset; /* calculate data size */ switch (f->page_size) { @@ -387,7 +387,7 @@ static int prepare_erase_cmd(struct pxa3xx_nand_info *info, static int prepare_other_cmd(struct pxa3xx_nand_info *info, uint16_t cmd) { - struct pxa3xx_nand_cmdset *cmdset = info->flash_info->cmdset; + const struct pxa3xx_nand_cmdset *cmdset = info->flash_info->cmdset; info->ndcb0 = cmd | ((cmd & 0xff00) ? NDCB0_DBC : 0); info->ndcb1 = 0; @@ -623,7 +623,7 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info *mtd, unsigned command, { struct pxa3xx_nand_info *info = mtd->priv; struct pxa3xx_nand_flash *flash_info = info->flash_info; - struct pxa3xx_nand_cmdset *cmdset = flash_info->cmdset; + const struct pxa3xx_nand_cmdset *cmdset = flash_info->cmdset; int ret; info->use_dma = (use_dma) ? 1 : 0; @@ -843,7 +843,7 @@ static int pxa3xx_nand_ecc_correct(struct mtd_info *mtd, static int __readid(struct pxa3xx_nand_info *info, uint32_t *id) { struct pxa3xx_nand_flash *f = info->flash_info; - struct pxa3xx_nand_cmdset *cmdset = f->cmdset; + const struct pxa3xx_nand_cmdset *cmdset = f->cmdset; uint32_t ndcr; uint8_t id_buff[8]; -- cgit v1.2.3 From c8c17c888d936c58ceb28b084a6272d67e10ea28 Mon Sep 17 00:00:00 2001 From: Enrico Scholz Date: Fri, 29 Aug 2008 12:59:51 +0200 Subject: [MTD] [NAND] pxa3xx_nand: moved some helper variables out from platform data This patch moves some attributes out from the platform data into the dynamically created nand device. This results into a cleaner interface and allows to use constant pxa3xx_nand_flash definitions. Signed-off-by: Enrico Scholz Signed-off-by: David Woodhouse --- arch/arm/mach-pxa/include/mach/pxa3xx_nand.h | 9 +----- drivers/mtd/nand/pxa3xx_nand.c | 43 ++++++++++++++++------------ 2 files changed, 26 insertions(+), 26 deletions(-) (limited to 'arch/arm/mach-pxa') diff --git a/arch/arm/mach-pxa/include/mach/pxa3xx_nand.h b/arch/arm/mach-pxa/include/mach/pxa3xx_nand.h index cfcb2e21aeeb..eb35fca9aea5 100644 --- a/arch/arm/mach-pxa/include/mach/pxa3xx_nand.h +++ b/arch/arm/mach-pxa/include/mach/pxa3xx_nand.h @@ -39,13 +39,6 @@ struct pxa3xx_nand_flash { uint32_t dfc_width; /* Width of flash controller(DWIDTH_C) */ uint32_t num_blocks; /* Number of physical blocks in Flash */ uint32_t chip_id; - - /* NOTE: these are automatically calculated, do not define */ - size_t oob_size; - size_t read_id_bytes; - - unsigned int col_addr_cycles; - unsigned int row_addr_cycles; }; struct pxa3xx_nand_platform_data { @@ -59,7 +52,7 @@ struct pxa3xx_nand_platform_data { const struct mtd_partition *parts; unsigned int nr_parts; - struct pxa3xx_nand_flash * const flash; + const struct pxa3xx_nand_flash * flash; size_t num_flash; }; diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c index af174054656e..bc37f551edf5 100644 --- a/drivers/mtd/nand/pxa3xx_nand.c +++ b/drivers/mtd/nand/pxa3xx_nand.c @@ -119,7 +119,7 @@ struct pxa3xx_nand_info { struct nand_chip nand_chip; struct platform_device *pdev; - struct pxa3xx_nand_flash *flash_info; + const struct pxa3xx_nand_flash *flash_info; struct clk *clk; void __iomem *mmio_base; @@ -158,6 +158,13 @@ struct pxa3xx_nand_info { uint32_t ndcb0; uint32_t ndcb1; uint32_t ndcb2; + + /* 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; @@ -335,7 +342,7 @@ static int wait_for_event(struct pxa3xx_nand_info *info, uint32_t event) static int prepare_read_prog_cmd(struct pxa3xx_nand_info *info, uint16_t cmd, int column, int page_addr) { - struct pxa3xx_nand_flash *f = info->flash_info; + const struct pxa3xx_nand_flash *f = info->flash_info; const struct pxa3xx_nand_cmdset *cmdset = f->cmdset; /* calculate data size */ @@ -354,14 +361,14 @@ static int prepare_read_prog_cmd(struct pxa3xx_nand_info *info, info->ndcb0 = cmd | ((cmd & 0xff00) ? NDCB0_DBC : 0); info->ndcb1 = 0; info->ndcb2 = 0; - info->ndcb0 |= NDCB0_ADDR_CYC(f->row_addr_cycles + f->col_addr_cycles); + info->ndcb0 |= NDCB0_ADDR_CYC(info->row_addr_cycles + info->col_addr_cycles); - if (f->col_addr_cycles == 2) { + if (info->col_addr_cycles == 2) { /* large block, 2 cycles for column address * row address starts from 3rd cycle */ info->ndcb1 |= (page_addr << 16) | (column & 0xffff); - if (f->row_addr_cycles == 3) + if (info->row_addr_cycles == 3) info->ndcb2 = (page_addr >> 16) & 0xff; } else /* small block, 1 cycles for column address @@ -622,7 +629,7 @@ 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_flash *flash_info = info->flash_info; + const struct pxa3xx_nand_flash *flash_info = info->flash_info; const struct pxa3xx_nand_cmdset *cmdset = flash_info->cmdset; int ret; @@ -701,7 +708,7 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info *mtd, unsigned command, info->use_dma = 0; /* force PIO read */ info->buf_start = 0; info->buf_count = (command == NAND_CMD_READID) ? - flash_info->read_id_bytes : 1; + info->read_id_bytes : 1; if (prepare_other_cmd(info, (command == NAND_CMD_READID) ? cmdset->read_id : cmdset->read_status)) @@ -842,7 +849,7 @@ static int pxa3xx_nand_ecc_correct(struct mtd_info *mtd, static int __readid(struct pxa3xx_nand_info *info, uint32_t *id) { - struct pxa3xx_nand_flash *f = info->flash_info; + const struct pxa3xx_nand_flash *f = info->flash_info; const struct pxa3xx_nand_cmdset *cmdset = f->cmdset; uint32_t ndcr; uint8_t id_buff[8]; @@ -872,7 +879,7 @@ fail_timeout: } static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info, - struct pxa3xx_nand_flash *f) + const struct pxa3xx_nand_flash *f) { struct platform_device *pdev = info->pdev; struct pxa3xx_nand_platform_data *pdata = pdev->dev.platform_data; @@ -885,25 +892,25 @@ static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info, return -EINVAL; /* calculate flash information */ - f->oob_size = (f->page_size == 2048) ? 64 : 16; - f->read_id_bytes = (f->page_size == 2048) ? 4 : 2; + info->oob_size = (f->page_size == 2048) ? 64 : 16; + info->read_id_bytes = (f->page_size == 2048) ? 4 : 2; /* calculate addressing information */ - f->col_addr_cycles = (f->page_size == 2048) ? 2 : 1; + info->col_addr_cycles = (f->page_size == 2048) ? 2 : 1; if (f->num_blocks * f->page_per_block > 65536) - f->row_addr_cycles = 3; + info->row_addr_cycles = 3; else - f->row_addr_cycles = 2; + info->row_addr_cycles = 2; ndcr |= (pdata->enable_arbiter) ? NDCR_ND_ARB_EN : 0; - ndcr |= (f->col_addr_cycles == 2) ? NDCR_RA_START : 0; + ndcr |= (info->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(f->read_id_bytes); + ndcr |= NDCR_RD_ID_CNT(info->read_id_bytes); ndcr |= NDCR_SPARE_EN; /* enable spare by default */ info->reg_ndcr = ndcr; @@ -916,7 +923,7 @@ static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info, static int pxa3xx_nand_detect_flash(struct pxa3xx_nand_info *info, const struct pxa3xx_nand_platform_data *pdata) { - struct pxa3xx_nand_flash *f; + const struct pxa3xx_nand_flash *f; uint32_t id; int i; @@ -1011,7 +1018,7 @@ static struct nand_ecclayout hw_largepage_ecclayout = { static void pxa3xx_nand_init_mtd(struct mtd_info *mtd, struct pxa3xx_nand_info *info) { - struct pxa3xx_nand_flash *f = info->flash_info; + const struct pxa3xx_nand_flash *f = info->flash_info; struct nand_chip *this = &info->nand_chip; this->options = (f->flash_width == 16) ? NAND_BUSWIDTH_16: 0; -- cgit v1.2.3