[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 <enrico.scholz@sigma-chemnitz.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 25 insertions, 18 deletions

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;