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mtd: bcm47xxnflash: define some magic numbers 

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
This commit is contained in:
Rafał Miłecki 2012-11-23 07:51:31 +01:00 committed by Artem Bityutskiy
parent 6a8214aa3d
commit e7e46168bc
1 changed files with 20 additions and 11 deletions
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31
drivers/mtd/nand/bcm47xxnflash/ops_bcm4706.c
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@ -22,6 +22,15 @@
#define NFLASH_SECTOR_SIZE 512
#define NCTL_CMD0 0x00010000
#define NCTL_CMD1W 0x00080000
#define NCTL_READ 0x00100000
#define NCTL_SPECADDR 0x01000000
#define NCTL_READY 0x04000000
#define NCTL_ERR 0x08000000
#define NCTL_CSA 0x40000000
#define NCTL_START 0x80000000
/**************************************************
* Various helpers
**************************************************/
@ -35,9 +44,9 @@ static int bcm47xxnflash_ops_bcm4706_ctl_cmd(struct bcma_drv_cc *cc, u32 code)
{
int i = 0;
bcma_cc_write32(cc, BCMA_CC_NFLASH_CTL, 0x80000000 | code);
bcma_cc_write32(cc, BCMA_CC_NFLASH_CTL, NCTL_START | code);
for (i = 0; i < NFLASH_READY_RETRIES; i++) {
if (!(bcma_cc_read32(cc, BCMA_CC_NFLASH_CTL) & 0x80000000)) {
if (!(bcma_cc_read32(cc, BCMA_CC_NFLASH_CTL) & NCTL_START)) {
i = 0;
break;
}
@ -54,7 +63,7 @@ static int bcm47xxnflash_ops_bcm4706_poll(struct bcma_drv_cc *cc)
int i;
for (i = 0; i < NFLASH_READY_RETRIES; i++) {
if (bcma_cc_read32(cc, BCMA_CC_NFLASH_CTL) & 0x04000000) {
if (bcma_cc_read32(cc, BCMA_CC_NFLASH_CTL) & NCTL_READY) {
if (bcma_cc_read32(cc, BCMA_CC_NFLASH_CTL) &
BCMA_CC_NFLASH_CTL_ERR) {
pr_err("Error on polling\n");
@ -99,8 +108,8 @@ static void bcm47xxnflash_ops_bcm4706_read(struct mtd_info *mtd, uint8_t *buf,
b47n->curr_page_addr);
/* Prepare to read */
ctlcode = 0x40000000 | 0x00080000 | 0x00040000 | 0x00020000 |
0x00010000;
ctlcode = NCTL_CSA | NCTL_CMD1W | 0x00040000 | 0x00020000 |
NCTL_CMD0;
ctlcode |= NAND_CMD_READSTART << 8;
if (bcm47xxnflash_ops_bcm4706_ctl_cmd(b47n->cc, ctlcode))
return;
@ -109,9 +118,9 @@ static void bcm47xxnflash_ops_bcm4706_read(struct mtd_info *mtd, uint8_t *buf,
/* Eventually read some data :) */
for (i = 0; i < toread; i += 4, dest++) {
ctlcode = 0x40000000 | 0x30000000 | 0x00100000;
ctlcode = NCTL_CSA | 0x30000000 | NCTL_READ;
if (i == toread - 4) /* Last read goes without that */
ctlcode &= ~0x40000000;
ctlcode &= ~NCTL_CSA;
if (bcm47xxnflash_ops_bcm4706_ctl_cmd(b47n->cc,
ctlcode))
return;
@ -160,7 +169,7 @@ static void bcm47xxnflash_ops_bcm4706_cmdfunc(struct mtd_info *mtd,
pr_warn("Chip reset not implemented yet\n");
break;
case NAND_CMD_READID:
ctlcode = 0x40000000 | 0x01000000 | 0x00080000 | 0x00010000;
ctlcode = NCTL_CSA | 0x01000000 | NCTL_CMD1W | NCTL_CMD0;
ctlcode |= NAND_CMD_READID;
if (bcm47xxnflash_ops_bcm4706_ctl_cmd(b47n->cc, ctlcode)) {
pr_err("READID error\n");
@ -168,14 +177,14 @@ static void bcm47xxnflash_ops_bcm4706_cmdfunc(struct mtd_info *mtd,
}
/*
* Reading is specific, last one has to go without 0x40000000
* Reading is specific, last one has to go without NCTL_CSA
* bit. We don't know how many reads NAND subsystem is going
* to perform, so cache everything.
*/
for (i = 0; i < ARRAY_SIZE(b47n->id_data); i++) {
ctlcode = 0x40000000 | 0x00100000;
ctlcode = NCTL_CSA | NCTL_READ;
if (i == ARRAY_SIZE(b47n->id_data) - 1)
ctlcode &= ~0x40000000;
ctlcode &= ~NCTL_CSA;
if (bcm47xxnflash_ops_bcm4706_ctl_cmd(b47n->cc,
ctlcode)) {
pr_err("READID error\n");