[PATCH 5/8] mxc_nand: add V1_V2 namespace to registers
Sascha Hauer
s.hauer at pengutronix.de
Fri Aug 6 09:53:08 EDT 2010
This prepares the driver for v3 support. The v3 controller
has a completely different register layout, so add a V1_V2_
namespace to the register defines to avoid confusion with
the v3 regs.
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
drivers/mtd/nand/mxc_nand.c | 141 +++++++++++++++++++------------------------
1 files changed, 63 insertions(+), 78 deletions(-)
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 70f64dc..48b6dca 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -41,58 +41,43 @@
#define nfc_is_v1() (cpu_is_mx31() || cpu_is_mx27() || cpu_is_mx21())
/* Addresses for NFC registers */
-#define NFC_BUF_SIZE 0x00
-#define NFC_BUF_ADDR 0x04
-#define NFC_FLASH_ADDR 0x06
-#define NFC_FLASH_CMD 0x08
-#define NFC_CONFIG 0x0a
-#define NFC_ECC_STATUS_RESULT 0x0c
-#define NFC_RSLTMAIN_AREA 0x0e
-#define NFC_RSLTSPARE_AREA 0x10
-#define NFC_WRPROT 0x12
-#define NFC_V1_UNLOCKSTART_BLKADDR 0x14
-#define NFC_V1_UNLOCKEND_BLKADDR 0x16
-#define NFC_V21_UNLOCKSTART_BLKADDR 0x20
-#define NFC_V21_UNLOCKEND_BLKADDR 0x22
-#define NFC_NF_WRPRST 0x18
-#define NFC_CONFIG1 0x1a
-#define NFC_CONFIG2 0x1c
-
-/* Set INT to 0, FCMD to 1, rest to 0 in NFC_CONFIG2 Register
- * for Command operation */
-#define NFC_CMD 0x1
-
-/* Set INT to 0, FADD to 1, rest to 0 in NFC_CONFIG2 Register
- * for Address operation */
-#define NFC_ADDR 0x2
-
-/* Set INT to 0, FDI to 1, rest to 0 in NFC_CONFIG2 Register
- * for Input operation */
-#define NFC_INPUT 0x4
-
-/* Set INT to 0, FDO to 001, rest to 0 in NFC_CONFIG2 Register
- * for Data Output operation */
-#define NFC_OUTPUT 0x8
-
-/* Set INT to 0, FD0 to 010, rest to 0 in NFC_CONFIG2 Register
- * for Read ID operation */
-#define NFC_ID 0x10
-
-/* Set INT to 0, FDO to 100, rest to 0 in NFC_CONFIG2 Register
- * for Read Status operation */
-#define NFC_STATUS 0x20
-
-/* Set INT to 1, rest to 0 in NFC_CONFIG2 Register for Read
- * Status operation */
-#define NFC_INT 0x8000
-
-#define NFC_SP_EN (1 << 2)
-#define NFC_ECC_EN (1 << 3)
-#define NFC_INT_MSK (1 << 4)
-#define NFC_BIG (1 << 5)
-#define NFC_RST (1 << 6)
-#define NFC_CE (1 << 7)
-#define NFC_ONE_CYCLE (1 << 8)
+#define NFC_V1_V2_BUF_SIZE (host->regs + 0x00)
+#define NFC_V1_V2_BUF_ADDR (host->regs + 0x04)
+#define NFC_V1_V2_FLASH_ADDR (host->regs + 0x06)
+#define NFC_V1_V2_FLASH_CMD (host->regs + 0x08)
+#define NFC_V1_V2_CONFIG (host->regs + 0x0a)
+#define NFC_V1_V2_ECC_STATUS_RESULT (host->regs + 0x0c)
+#define NFC_V1_V2_RSLTMAIN_AREA (host->regs + 0x0e)
+#define NFC_V1_V2_RSLTSPARE_AREA (host->regs + 0x10)
+#define NFC_V1_V2_WRPROT (host->regs + 0x12)
+#define NFC_V1_UNLOCKSTART_BLKADDR (host->regs + 0x14)
+#define NFC_V1_UNLOCKEND_BLKADDR (host->regs + 0x16)
+#define NFC_V21_UNLOCKSTART_BLKADDR (host->regs + 0x20)
+#define NFC_V21_UNLOCKEND_BLKADDR (host->regs + 0x22)
+#define NFC_V1_V2_NF_WRPRST (host->regs + 0x18)
+#define NFC_V1_V2_CONFIG1 (host->regs + 0x1a)
+#define NFC_V1_V2_CONFIG2 (host->regs + 0x1c)
+
+#define NFC_V1_V2_CONFIG1_SP_EN (1 << 2)
+#define NFC_V1_V2_CONFIG1_ECC_EN (1 << 3)
+#define NFC_V1_V2_CONFIG1_INT_MSK (1 << 4)
+#define NFC_V1_V2_CONFIG1_BIG (1 << 5)
+#define NFC_V1_V2_CONFIG1_RST (1 << 6)
+#define NFC_V1_V2_CONFIG1_CE (1 << 7)
+#define NFC_V1_V2_CONFIG1_ONE_CYCLE (1 << 8)
+
+#define NFC_V1_V2_CONFIG2_INT (1 << 15)
+
+/*
+ * Operation modes for the NFC. Valid for v1, v2 and v3
+ * type controllers.
+ */
+#define NFC_CMD (1 << 0)
+#define NFC_ADDR (1 << 1)
+#define NFC_INPUT (1 << 2)
+#define NFC_OUTPUT (1 << 3)
+#define NFC_ID (1 << 4)
+#define NFC_STATUS (1 << 5)
struct mxc_nand_host {
struct mtd_info mtd;
@@ -186,11 +171,11 @@ static int check_int_v1_v2(struct mxc_nand_host *host)
{
uint32_t tmp;
- tmp = readw(host->regs + NFC_CONFIG2);
- if (!(tmp & NFC_INT))
+ tmp = readw(NFC_V1_V2_CONFIG2);
+ if (!(tmp & NFC_V1_V2_CONFIG2_INT))
return 0;
- writew(tmp & ~NFC_INT, NFC_CONFIG2);
+ writew(tmp & ~NFC_V1_V2_CONFIG2_INT, NFC_V1_V2_CONFIG2);
return 1;
}
@@ -228,15 +213,15 @@ static void send_cmd_v1_v2(struct mxc_nand_host *host, uint16_t cmd, int useirq)
{
DEBUG(MTD_DEBUG_LEVEL3, "send_cmd(host, 0x%x, %d)\n", cmd, useirq);
- writew(cmd, host->regs + NFC_FLASH_CMD);
- writew(NFC_CMD, host->regs + NFC_CONFIG2);
+ writew(cmd, NFC_V1_V2_FLASH_CMD);
+ writew(NFC_CMD, NFC_V1_V2_CONFIG2);
if (cpu_is_mx21() && (cmd == NAND_CMD_RESET)) {
int max_retries = 100;
/* Reset completion is indicated by NFC_CONFIG2 */
/* being set to 0 */
while (max_retries-- > 0) {
- if (readw(host->regs + NFC_CONFIG2) == 0) {
+ if (readw(NFC_V1_V2_CONFIG2) == 0) {
break;
}
udelay(1);
@@ -257,8 +242,8 @@ static void send_addr_v1_v2(struct mxc_nand_host *host, uint16_t addr, int islas
{
DEBUG(MTD_DEBUG_LEVEL3, "send_addr(host, 0x%x %d)\n", addr, islast);
- writew(addr, host->regs + NFC_FLASH_ADDR);
- writew(NFC_ADDR, host->regs + NFC_CONFIG2);
+ writew(addr, NFC_V1_V2_FLASH_ADDR);
+ writew(NFC_ADDR, NFC_V1_V2_CONFIG2);
/* Wait for operation to complete */
wait_op_done(host, islast);
@@ -278,9 +263,9 @@ static void send_page_v1_v2(struct mtd_info *mtd, unsigned int ops)
for (i = 0; i < bufs; i++) {
/* NANDFC buffer 0 is used for page read/write */
- writew(i, host->regs + NFC_BUF_ADDR);
+ writew(i, NFC_V1_V2_BUF_ADDR);
- writew(ops, host->regs + NFC_CONFIG2);
+ writew(ops, NFC_V1_V2_CONFIG2);
/* Wait for operation to complete */
wait_op_done(host, true);
@@ -293,9 +278,9 @@ static void send_read_id_v1_v2(struct mxc_nand_host *host)
struct nand_chip *this = &host->nand;
/* NANDFC buffer 0 is used for device ID output */
- writew(0x0, host->regs + NFC_BUF_ADDR);
+ writew(0x0, NFC_V1_V2_BUF_ADDR);
- writew(NFC_ID, host->regs + NFC_CONFIG2);
+ writew(NFC_ID, NFC_V1_V2_CONFIG2);
/* Wait for operation to complete */
wait_op_done(host, true);
@@ -329,7 +314,7 @@ static uint16_t get_dev_status_v1_v2(struct mxc_nand_host *host)
*/
store = readl(main_buf);
- writew(NFC_STATUS, host->regs + NFC_CONFIG2);
+ writew(NFC_STATUS, NFC_V1_V2_CONFIG2);
wait_op_done(host, true);
ret = readw(main_buf);
@@ -368,7 +353,7 @@ static int mxc_nand_correct_data(struct mtd_info *mtd, u_char *dat,
* additional correction. 2-Bit errors cannot be corrected by
* HW ECC, so we need to return failure
*/
- uint16_t ecc_status = readw(host->regs + NFC_ECC_STATUS_RESULT);
+ uint16_t ecc_status = readw(NFC_V1_V2_ECC_STATUS_RESULT);
if (((ecc_status & 0x3) == 2) || ((ecc_status >> 2) == 2)) {
DEBUG(MTD_DEBUG_LEVEL0,
@@ -568,32 +553,32 @@ static void preset_v1_v2(struct mtd_info *mtd)
uint16_t tmp;
/* enable interrupt, disable spare enable */
- tmp = readw(host->regs + NFC_CONFIG1);
- tmp &= ~NFC_INT_MSK;
- tmp &= ~NFC_SP_EN;
+ tmp = readw(NFC_V1_V2_CONFIG1);
+ tmp &= ~NFC_V1_V2_CONFIG1_INT_MSK;
+ tmp &= ~NFC_V1_V2_CONFIG1_SP_EN;
if (nand_chip->ecc.mode == NAND_ECC_HW) {
- tmp |= NFC_ECC_EN;
+ tmp |= NFC_V1_V2_CONFIG1_ECC_EN;
} else {
- tmp &= ~NFC_ECC_EN;
+ tmp &= ~NFC_V1_V2_CONFIG1_ECC_EN;
}
- writew(tmp, host->regs + NFC_CONFIG1);
+ writew(tmp, NFC_V1_V2_CONFIG1);
/* preset operation */
/* Unlock the internal RAM Buffer */
- writew(0x2, host->regs + NFC_CONFIG);
+ writew(0x2, NFC_V1_V2_CONFIG);
/* Blocks to be unlocked */
if (nfc_is_v21()) {
- writew(0x0, host->regs + NFC_V21_UNLOCKSTART_BLKADDR);
- writew(0xffff, host->regs + NFC_V21_UNLOCKEND_BLKADDR);
+ writew(0x0, NFC_V21_UNLOCKSTART_BLKADDR);
+ writew(0xffff, NFC_V21_UNLOCKEND_BLKADDR);
} else if (nfc_is_v1()) {
- writew(0x0, host->regs + NFC_V1_UNLOCKSTART_BLKADDR);
- writew(0x4000, host->regs + NFC_V1_UNLOCKEND_BLKADDR);
+ writew(0x0, NFC_V1_UNLOCKSTART_BLKADDR);
+ writew(0x4000, NFC_V1_UNLOCKEND_BLKADDR);
} else
BUG();
/* Unlock Block Command for given address range */
- writew(0x4, host->regs + NFC_WRPROT);
+ writew(0x4, NFC_V1_V2_WRPROT);
}
/* Used by the upper layer to write command to NAND Flash for
--
1.7.1
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