mtd: pxa3xx_nand: set oob length in the runtime

For different command need different oob requirement, set the proper
oob length by different cmd.

Signed-off-by: Lei Wen <leiwen@marvell.com>
Acked-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index cafd8e4..17f8518 100644 (file)
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -273,13 +273,20 @@ static int wait_for_event(struct pxa3xx_nand_info *info, uint32_t event)
 
 static void pxa3xx_set_datasize(struct pxa3xx_nand_info *info)
 {
-       /* calculate data size */
+       int oob_enable = info->reg_ndcr & NDCR_SPARE_EN;
+
+       info->data_size = info->page_size;
+       if (!oob_enable) {
+               info->oob_size = 0;
+               return;
+       }
+
        switch (info->page_size) {
        case 2048:
-               info->data_size = (info->use_ecc) ? 2088 : 2112;
+               info->oob_size = (info->use_ecc) ? 40 : 64;
                break;
        case 512:
-               info->data_size = (info->use_ecc) ? 520 : 528;
+               info->oob_size = (info->use_ecc) ? 8 : 16;
                break;
        }
 }
@@ -333,6 +340,7 @@ static int prepare_other_cmd(struct pxa3xx_nand_info *info, uint16_t cmd)
        info->ndcb1 = 0;
        info->ndcb2 = 0;
 
+       info->oob_size = 0;
        if (cmd == cmdset->read_id) {
                info->ndcb0 |= NDCB0_CMD_TYPE(3);
                info->data_size = 8;
@@ -401,6 +409,9 @@ static int handle_data_pio(struct pxa3xx_nand_info *info)
        case STATE_PIO_WRITING:
                __raw_writesl(info->mmio_base + NDDB, info->data_buff,
                                DIV_ROUND_UP(info->data_size, 4));
+               if (info->oob_size > 0)
+                       __raw_writesl(info->mmio_base + NDDB, info->oob_buff,
+                                       DIV_ROUND_UP(info->oob_size, 4));
 
                enable_int(info, NDSR_CS0_BBD | NDSR_CS0_CMDD);
 
@@ -413,6 +424,9 @@ static int handle_data_pio(struct pxa3xx_nand_info *info)
        case STATE_PIO_READING:
                __raw_readsl(info->mmio_base + NDDB, info->data_buff,
                                DIV_ROUND_UP(info->data_size, 4));
+               if (info->oob_size > 0)
+                       __raw_readsl(info->mmio_base + NDDB, info->oob_buff,
+                                       DIV_ROUND_UP(info->oob_size, 4));
                break;
        default:
                printk(KERN_ERR "%s: invalid state %d\n", __func__,
@@ -427,7 +441,7 @@ static int handle_data_pio(struct pxa3xx_nand_info *info)
 static void start_data_dma(struct pxa3xx_nand_info *info, int dir_out)
 {
        struct pxa_dma_desc *desc = info->data_desc;
-       int dma_len = ALIGN(info->data_size, 32);
+       int dma_len = ALIGN(info->data_size + info->oob_size, 32);
 
        desc->ddadr = DDADR_STOP;
        desc->dcmd = DCMD_ENDIRQEN | DCMD_WIDTH4 | DCMD_BURST32 | dma_len;
@@ -833,7 +847,6 @@ static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info,
        info->cmdset = f->cmdset;
        info->page_size = f->page_size;
        info->oob_buff = info->data_buff + f->page_size;
-       info->oob_size = (f->page_size == 2048) ? 64 : 16;
        info->read_id_bytes = (f->page_size == 2048) ? 4 : 2;
 
        /* calculate addressing information */
@@ -892,8 +905,6 @@ static int pxa3xx_nand_detect_config(struct pxa3xx_nand_info *info)
        i = __ffs(page_per_block * info->page_size);
        num_blocks = type->chipsize << (20 - i);
 
-       info->oob_size = (info->page_size == 2048) ? 64 : 16;
-
        /* calculate addressing information */
        info->col_addr_cycles = (info->page_size == 2048) ? 2 : 1;