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Commit e7e46168 authored by Rafał Miłecki's avatar Rafał Miłecki Committed by Artem Bityutskiy
Browse files

mtd: bcm47xxnflash: define some magic numbers 



Signed-off-by: default avatarRafał Miłecki <zajec5@gmail.com>
Signed-off-by: default avatarArtem Bityutskiy <artem.bityutskiy@linux.intel.com>
parent 6a8214aa

drivers/mtd/nand/bcm47xxnflash/ops_bcm4706.c

+20 −11
Original line number Diff line number Diff line
@@ -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");