lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

mxc_nand: add V1_V2 namespace to registers

Browse Source 
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>
This commit is contained in:
Sascha Hauer
2010-08-06 15:53:08 +02:00
committed by David Woodhouse
parent 7aaf28ac02
commit 1bc991808d
1 changed files with 60 additions and 75 deletions
Download Patch File Download Diff File Expand all files Collapse all files

135
drivers/mtd/nand/mxc_nand.c
View File

@@ -41,58 +41,43 @@
#define nfc_is_v1() (cpu_is_mx31() || cpu_is_mx27() || cpu_is_mx21()) #define nfc_is_v1() (cpu_is_mx31() || cpu_is_mx27() || cpu_is_mx21())
/* Addresses for NFC registers */ /* Addresses for NFC registers */
#define NFC_BUF_SIZE 0x00 #define NFC_V1_V2_BUF_SIZE (host->regs + 0x00)
#define NFC_BUF_ADDR 0x04 #define NFC_V1_V2_BUF_ADDR (host->regs + 0x04)
#define NFC_FLASH_ADDR 0x06 #define NFC_V1_V2_FLASH_ADDR (host->regs + 0x06)
#define NFC_FLASH_CMD 0x08 #define NFC_V1_V2_FLASH_CMD (host->regs + 0x08)
#define NFC_CONFIG 0x0a #define NFC_V1_V2_CONFIG (host->regs + 0x0a)
#define NFC_ECC_STATUS_RESULT 0x0c #define NFC_V1_V2_ECC_STATUS_RESULT (host->regs + 0x0c)
#define NFC_RSLTMAIN_AREA 0x0e #define NFC_V1_V2_RSLTMAIN_AREA (host->regs + 0x0e)
#define NFC_RSLTSPARE_AREA 0x10 #define NFC_V1_V2_RSLTSPARE_AREA (host->regs + 0x10)
#define NFC_WRPROT 0x12 #define NFC_V1_V2_WRPROT (host->regs + 0x12)
#define NFC_V1_UNLOCKSTART_BLKADDR 0x14 #define NFC_V1_UNLOCKSTART_BLKADDR (host->regs + 0x14)
#define NFC_V1_UNLOCKEND_BLKADDR 0x16 #define NFC_V1_UNLOCKEND_BLKADDR (host->regs + 0x16)
#define NFC_V21_UNLOCKSTART_BLKADDR 0x20 #define NFC_V21_UNLOCKSTART_BLKADDR (host->regs + 0x20)
#define NFC_V21_UNLOCKEND_BLKADDR 0x22 #define NFC_V21_UNLOCKEND_BLKADDR (host->regs + 0x22)
#define NFC_NF_WRPRST 0x18 #define NFC_V1_V2_NF_WRPRST (host->regs + 0x18)
#define NFC_CONFIG1 0x1a #define NFC_V1_V2_CONFIG1 (host->regs + 0x1a)
#define NFC_CONFIG2 0x1c #define NFC_V1_V2_CONFIG2 (host->regs + 0x1c)
/* Set INT to 0, FCMD to 1, rest to 0 in NFC_CONFIG2 Register #define NFC_V1_V2_CONFIG1_SP_EN (1 << 2)
* for Command operation */ #define NFC_V1_V2_CONFIG1_ECC_EN (1 << 3)
#define NFC_CMD 0x1 #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)
/* Set INT to 0, FADD to 1, rest to 0 in NFC_CONFIG2 Register #define NFC_V1_V2_CONFIG2_INT (1 << 15)
* for Address operation */
#define NFC_ADDR 0x2
/* Set INT to 0, FDI to 1, rest to 0 in NFC_CONFIG2 Register /*
* for Input operation */ * Operation modes for the NFC. Valid for v1, v2 and v3
#define NFC_INPUT 0x4 * type controllers.
*/
/* Set INT to 0, FDO to 001, rest to 0 in NFC_CONFIG2 Register #define NFC_CMD (1 << 0)
* for Data Output operation */ #define NFC_ADDR (1 << 1)
#define NFC_OUTPUT 0x8 #define NFC_INPUT (1 << 2)
#define NFC_OUTPUT (1 << 3)
/* Set INT to 0, FD0 to 010, rest to 0 in NFC_CONFIG2 Register #define NFC_ID (1 << 4)
* for Read ID operation */ #define NFC_STATUS (1 << 5)
#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)
struct mxc_nand_host { struct mxc_nand_host {
struct mtd_info mtd; struct mtd_info mtd;
@@ -186,11 +171,11 @@ static int check_int_v1_v2(struct mxc_nand_host *host)
{ {
uint32_t tmp; uint32_t tmp;
tmp = readw(host->regs + NFC_CONFIG2); tmp = readw(NFC_V1_V2_CONFIG2);
if (!(tmp & NFC_INT)) if (!(tmp & NFC_V1_V2_CONFIG2_INT))
return 0; return 0;
writew(tmp & ~NFC_INT, NFC_CONFIG2); writew(tmp & ~NFC_V1_V2_CONFIG2_INT, NFC_V1_V2_CONFIG2);
return 1; 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); DEBUG(MTD_DEBUG_LEVEL3, "send_cmd(host, 0x%x, %d)\n", cmd, useirq);
writew(cmd, host->regs + NFC_FLASH_CMD); writew(cmd, NFC_V1_V2_FLASH_CMD);
writew(NFC_CMD, host->regs + NFC_CONFIG2); writew(NFC_CMD, NFC_V1_V2_CONFIG2);
if (cpu_is_mx21() && (cmd == NAND_CMD_RESET)) { if (cpu_is_mx21() && (cmd == NAND_CMD_RESET)) {
int max_retries = 100; int max_retries = 100;
/* Reset completion is indicated by NFC_CONFIG2 */ /* Reset completion is indicated by NFC_CONFIG2 */
/* being set to 0 */ /* being set to 0 */
while (max_retries-- > 0) { while (max_retries-- > 0) {
if (readw(host->regs + NFC_CONFIG2) == 0) { if (readw(NFC_V1_V2_CONFIG2) == 0) {
break; break;
} }
udelay(1); 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); DEBUG(MTD_DEBUG_LEVEL3, "send_addr(host, 0x%x %d)\n", addr, islast);
writew(addr, host->regs + NFC_FLASH_ADDR); writew(addr, NFC_V1_V2_FLASH_ADDR);
writew(NFC_ADDR, host->regs + NFC_CONFIG2); writew(NFC_ADDR, NFC_V1_V2_CONFIG2);
/* Wait for operation to complete */ /* Wait for operation to complete */
wait_op_done(host, islast); 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++) { for (i = 0; i < bufs; i++) {
/* NANDFC buffer 0 is used for page read/write */ /* 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 for operation to complete */
wait_op_done(host, true); 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; struct nand_chip *this = &host->nand;
/* NANDFC buffer 0 is used for device ID output */ /* 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 for operation to complete */
wait_op_done(host, true); 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); store = readl(main_buf);
writew(NFC_STATUS, host->regs + NFC_CONFIG2); writew(NFC_STATUS, NFC_V1_V2_CONFIG2);
wait_op_done(host, true); wait_op_done(host, true);
ret = readw(main_buf); 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 * additional correction. 2-Bit errors cannot be corrected by
* HW ECC, so we need to return failure * 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)) { if (((ecc_status & 0x3) == 2) || ((ecc_status >> 2) == 2)) {
DEBUG(MTD_DEBUG_LEVEL0, DEBUG(MTD_DEBUG_LEVEL0,
@@ -568,32 +553,32 @@ static void preset_v1_v2(struct mtd_info *mtd)
uint16_t tmp; uint16_t tmp;
/* enable interrupt, disable spare enable */ /* enable interrupt, disable spare enable */
tmp = readw(host->regs + NFC_CONFIG1); tmp = readw(NFC_V1_V2_CONFIG1);
tmp &= ~NFC_INT_MSK; tmp &= ~NFC_V1_V2_CONFIG1_INT_MSK;
tmp &= ~NFC_SP_EN; tmp &= ~NFC_V1_V2_CONFIG1_SP_EN;
if (nand_chip->ecc.mode == NAND_ECC_HW) { if (nand_chip->ecc.mode == NAND_ECC_HW) {
tmp |= NFC_ECC_EN; tmp |= NFC_V1_V2_CONFIG1_ECC_EN;
} else { } 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 */ /* preset operation */
/* Unlock the internal RAM Buffer */ /* Unlock the internal RAM Buffer */
writew(0x2, host->regs + NFC_CONFIG); writew(0x2, NFC_V1_V2_CONFIG);
/* Blocks to be unlocked */ /* Blocks to be unlocked */
if (nfc_is_v21()) { if (nfc_is_v21()) {
writew(0x0, host->regs + NFC_V21_UNLOCKSTART_BLKADDR); writew(0x0, NFC_V21_UNLOCKSTART_BLKADDR);
writew(0xffff, host->regs + NFC_V21_UNLOCKEND_BLKADDR); writew(0xffff, NFC_V21_UNLOCKEND_BLKADDR);
} else if (nfc_is_v1()) { } else if (nfc_is_v1()) {
writew(0x0, host->regs + NFC_V1_UNLOCKSTART_BLKADDR); writew(0x0, NFC_V1_UNLOCKSTART_BLKADDR);
writew(0x4000, host->regs + NFC_V1_UNLOCKEND_BLKADDR); writew(0x4000, NFC_V1_UNLOCKEND_BLKADDR);
} else } else
BUG(); BUG();
/* Unlock Block Command for given address range */ /* 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 /* Used by the upper layer to write command to NAND Flash for