mxc_nand: add V1_V2 namespace to registers

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@pengutronix.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 63 insertions, 78 deletions

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index ea491140e552..6d0fa4cd1ddf 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