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authorRafał Miłecki <zajec5@gmail.com>2012-12-03 10:22:35 +0100
committerArtem Bityutskiy <artem.bityutskiy@linux.intel.com>2012-12-10 14:09:49 +0200
commitecfe57b796d4ccec7ea53783ca18a0ad48ad880b (patch)
treefcf2967b23a721aa05fe89e2723ba502ddc6ca82 /drivers/mtd
parentd8b1e34e248d89f43bab18704894d537dc0b497e (diff)
mtd: bcm47xxnflash: writing support
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/Kconfig5
-rw-r--r--drivers/mtd/nand/bcm47xxnflash/ops_bcm4706.c77
2 files changed, 79 insertions, 3 deletions
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 3314e92120c9..37ffe56e74a4 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -461,13 +461,12 @@ config MTD_NAND_GPMI_NAND
the GPMI.
config MTD_NAND_BCM47XXNFLASH
- tristate "R/O support for NAND flash on BCMA bus"
+ tristate "Support for NAND flash on BCM4706 BCMA bus"
depends on BCMA_NFLASH
help
BCMA bus can have various flash memories attached, they are
registered by bcma as platform devices. This enables driver for
- NAND flash memories. For now only read mode for BCM4706 is
- implemented.
+ NAND flash memories. For now only BCM4706 is supported.
config MTD_NAND_PLATFORM
tristate "Support for generic platform NAND driver"
diff --git a/drivers/mtd/nand/bcm47xxnflash/ops_bcm4706.c b/drivers/mtd/nand/bcm47xxnflash/ops_bcm4706.c
index ece343ccc1b0..86c9a79b89b3 100644
--- a/drivers/mtd/nand/bcm47xxnflash/ops_bcm4706.c
+++ b/drivers/mtd/nand/bcm47xxnflash/ops_bcm4706.c
@@ -25,6 +25,7 @@
#define NCTL_CMD0 0x00010000
#define NCTL_CMD1W 0x00080000
#define NCTL_READ 0x00100000
+#define NCTL_WRITE 0x00200000
#define NCTL_SPECADDR 0x01000000
#define NCTL_READY 0x04000000
#define NCTL_ERR 0x08000000
@@ -132,6 +133,36 @@ static void bcm47xxnflash_ops_bcm4706_read(struct mtd_info *mtd, uint8_t *buf,
}
}
+static void bcm47xxnflash_ops_bcm4706_write(struct mtd_info *mtd,
+ const uint8_t *buf, int len)
+{
+ struct nand_chip *nand_chip = (struct nand_chip *)mtd->priv;
+ struct bcm47xxnflash *b47n = (struct bcm47xxnflash *)nand_chip->priv;
+ struct bcma_drv_cc *cc = b47n->cc;
+
+ u32 ctlcode;
+ const u32 *data = (u32 *)buf;
+ int i;
+
+ BUG_ON(b47n->curr_page_addr & ~nand_chip->pagemask);
+ /* Don't validate column using nand_chip->page_shift, it may be bigger
+ * when accessing OOB */
+
+ for (i = 0; i < len; i += 4, data++) {
+ bcma_cc_write32(cc, BCMA_CC_NFLASH_DATA, *data);
+
+ ctlcode = NCTL_CSA | 0x30000000 | NCTL_WRITE;
+ if (i == len - 4) /* Last read goes without that */
+ ctlcode &= ~NCTL_CSA;
+ if (bcm47xxnflash_ops_bcm4706_ctl_cmd(cc, ctlcode)) {
+ pr_err("%s ctl_cmd didn't work!\n", __func__);
+ return;
+ }
+ }
+
+ b47n->curr_column += len;
+}
+
/**************************************************
* NAND chip ops
**************************************************/
@@ -208,6 +239,36 @@ static void bcm47xxnflash_ops_bcm4706_cmdfunc(struct mtd_info *mtd,
if (page_addr != -1)
b47n->curr_column += mtd->writesize;
break;
+ case NAND_CMD_ERASE1:
+ bcma_cc_write32(cc, BCMA_CC_NFLASH_ROW_ADDR,
+ b47n->curr_page_addr);
+ ctlcode = 0x00040000 | NCTL_CMD1W | NCTL_CMD0 |
+ NAND_CMD_ERASE1 | (NAND_CMD_ERASE2 << 8);
+ if (bcm47xxnflash_ops_bcm4706_ctl_cmd(cc, ctlcode))
+ pr_err("ERASE1 failed\n");
+ break;
+ case NAND_CMD_ERASE2:
+ break;
+ case NAND_CMD_SEQIN:
+ /* Set page and column */
+ bcma_cc_write32(cc, BCMA_CC_NFLASH_COL_ADDR,
+ b47n->curr_column);
+ bcma_cc_write32(cc, BCMA_CC_NFLASH_ROW_ADDR,
+ b47n->curr_page_addr);
+
+ /* Prepare to write */
+ ctlcode = 0x40000000 | 0x00040000 | 0x00020000 | 0x00010000;
+ ctlcode |= NAND_CMD_SEQIN;
+ if (bcm47xxnflash_ops_bcm4706_ctl_cmd(cc, ctlcode))
+ pr_err("SEQIN failed\n");
+ break;
+ case NAND_CMD_PAGEPROG:
+ if (bcm47xxnflash_ops_bcm4706_ctl_cmd(cc, 0x00010000 |
+ NAND_CMD_PAGEPROG))
+ pr_err("PAGEPROG failed\n");
+ if (bcm47xxnflash_ops_bcm4706_poll(cc))
+ pr_err("PAGEPROG not ready\n");
+ break;
default:
pr_err("Command 0x%X unsupported\n", command);
break;
@@ -259,6 +320,21 @@ static void bcm47xxnflash_ops_bcm4706_read_buf(struct mtd_info *mtd,
pr_err("Invalid command for buf read: 0x%X\n", b47n->curr_command);
}
+static void bcm47xxnflash_ops_bcm4706_write_buf(struct mtd_info *mtd,
+ const uint8_t *buf, int len)
+{
+ struct nand_chip *nand_chip = (struct nand_chip *)mtd->priv;
+ struct bcm47xxnflash *b47n = (struct bcm47xxnflash *)nand_chip->priv;
+
+ switch (b47n->curr_command) {
+ case NAND_CMD_SEQIN:
+ bcm47xxnflash_ops_bcm4706_write(mtd, buf, len);
+ return;
+ }
+
+ pr_err("Invalid command for buf write: 0x%X\n", b47n->curr_command);
+}
+
/**************************************************
* Init
**************************************************/
@@ -278,6 +354,7 @@ int bcm47xxnflash_ops_bcm4706_init(struct bcm47xxnflash *b47n)
b47n->nand_chip.cmdfunc = bcm47xxnflash_ops_bcm4706_cmdfunc;
b47n->nand_chip.read_byte = bcm47xxnflash_ops_bcm4706_read_byte;
b47n->nand_chip.read_buf = bcm47xxnflash_ops_bcm4706_read_buf;
+ b47n->nand_chip.write_buf = bcm47xxnflash_ops_bcm4706_write_buf;
b47n->nand_chip.bbt_options = NAND_BBT_USE_FLASH;
b47n->nand_chip.ecc.mode = NAND_ECC_NONE; /* TODO: implement ECC */