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Add MX25 support to nand_spl fsl nfc driver 

MX25 has a different version of the fsl_nfc
flash controller known as version 1.1.

Add support to the nand_spl fsl_nfc driver

Versioning differs from mainline mxc kernel driver
no consensus yet on if the naming here and in
Redboot or the kernel is "correct".

Signed-off-by: John Rigby <jcrigby@gmail.com>
Signed-off-by: Wolfgang Denk <wd@denx.de>
CC: Scott Wood <scottwood@freescale.com>
This commit is contained in:
John Rigby 2010-01-26 19:24:17 -07:00 committed by Scott Wood
parent ef22b50370
commit f3bb63a304
2 changed files with 131 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

86
include/fsl_nfc.h
View File

@ -1,5 +1,4 @@
/* /*
*
* (c) 2009 Magnus Lilja <lilja.magnus@gmail.com> * (c) 2009 Magnus Lilja <lilja.magnus@gmail.com>
* *
* See file CREDITS for list of people who contributed to this * See file CREDITS for list of people who contributed to this
@ -25,21 +24,57 @@
#define __FSL_NFC_H #define __FSL_NFC_H
/* /*
* TODO: Use same register defs for nand_spl mxc nand driver
* and mtd mxc nand driver.
*
* Register map and bit definitions for the Freescale NAND Flash * Register map and bit definitions for the Freescale NAND Flash
* Controller present in i.MX31 and other devices. * Controller present in various i.MX devices.
*
* MX31 and MX27 have version 1 which has
* 4 512 byte main buffers and
* 4 16 byte spare buffers
* to support up to 2K byte pagesize nand.
* Reading or writing a 2K page requires 4 FDI/FDO cycles.
*
* MX25 has version 1.1 which has
* 8 512 byte main buffers and
* 8 64 byte spare buffers
* to support up to 4K byte pagesize nand.
* Reading or writing a 2K or 4K page requires only 1 FDI/FDO cycle.
* Also some of registers are moved and/or changed meaning as seen below.
*/ */
#if defined(CONFIG_MX31) || defined(CONFIG_MX27)
#define MXC_NFC_V1
#elif defined(CONFIG_MX25)
#define MXC_NFC_V1_1
#else
#warning "MXC NFC version not defined"
#endif
#if defined(MXC_NFC_V1)
#define NAND_MXC_NR_BUFS 4
#define NAND_MXC_SPARE_BUF_SIZE 16
#define NAND_MXC_REG_OFFSET 0xe00
#define NAND_MXC_2K_MULTI_CYCLE 1
#elif defined(MXC_NFC_V1_1)
#define NAND_MXC_NR_BUFS 8
#define NAND_MXC_SPARE_BUF_SIZE 64
#define NAND_MXC_REG_OFFSET 0x1e00
#else
#error "define CONFIG_NAND_MXC_VXXX to use the mxc spl_nand driver"
#endif
struct fsl_nfc_regs { struct fsl_nfc_regs {
u32 main_area0[128]; /* @0x000 */ u32 main_area[NAND_MXC_NR_BUFS][512/4];
u32 main_area1[128]; u32 spare_area[NAND_MXC_NR_BUFS][NAND_MXC_SPARE_BUF_SIZE/4];
u32 main_area2[128]; /*
u32 main_area3[128]; * reserved size is offset of nfc registers
u32 spare_area0[4]; * minus total main and spare sizes
u32 spare_area1[4]; */
u32 spare_area2[4]; u8 reserved1[NAND_MXC_REG_OFFSET
u32 spare_area3[4]; - NAND_MXC_NR_BUFS * (512 + NAND_MXC_SPARE_BUF_SIZE)];
u32 reserved1[64 - 16 + 64 * 5]; #if defined(MXC_NFC_V1)
u16 bufsiz; /* @ 0xe00 */ u16 bufsiz;
u16 reserved2; u16 reserved2;
u16 buffer_address; u16 buffer_address;
u16 flash_add; u16 flash_add;
@ -54,6 +89,30 @@ struct fsl_nfc_regs {
u16 nand_flash_wr_pr_st; u16 nand_flash_wr_pr_st;
u16 nand_flash_config1; u16 nand_flash_config1;
u16 nand_flash_config2; u16 nand_flash_config2;
#elif defined(MXC_NFC_V1_1)
u16 reserved2[2];
u16 buffer_address;
u16 flash_add;
u16 flash_cmd;
u16 configuration;
u16 ecc_status_result;
u16 ecc_status_result2;
u16 spare_area_size;
u16 nf_wr_prot;
u16 reserved3[2];
u16 nand_flash_wr_pr_st;
u16 nand_flash_config1;
u16 nand_flash_config2;
u16 reserved4;
u16 unlock_start_blk_add0;
u16 unlock_end_blk_add0;
u16 unlock_start_blk_add1;
u16 unlock_end_blk_add1;
u16 unlock_start_blk_add2;
u16 unlock_end_blk_add2;
u16 unlock_start_blk_add3;
u16 unlock_end_blk_add3;
#endif
}; };
/* /*
@ -98,6 +157,9 @@ struct fsl_nfc_regs {
*/ */
#define NFC_INT 0x8000 #define NFC_INT 0x8000
#ifdef MXC_NFC_V1_1
#define NFC_4_8N_ECC (1 << 0)
#endif
#define NFC_SP_EN (1 << 2) #define NFC_SP_EN (1 << 2)
#define NFC_ECC_EN (1 << 3) #define NFC_ECC_EN (1 << 3)
#define NFC_INT_MSK (1 << 4) #define NFC_INT_MSK (1 << 4)

72
nand_spl/nand_boot_fsl_nfc.c
View File

@ -26,11 +26,15 @@
#include <common.h> #include <common.h>
#include <nand.h> #include <nand.h>
#ifdef CONFIG_MX31
#include <asm-arm/arch/mx31-regs.h> #include <asm-arm/arch/mx31-regs.h>
#else
#include <asm-arm/arch/imx-regs.h>
#endif
#include <asm/io.h> #include <asm/io.h>
#include <fsl_nfc.h> #include <fsl_nfc.h>
static struct fsl_nfc_regs *nfc; struct fsl_nfc_regs *nfc;
static void nfc_wait_ready(void) static void nfc_wait_ready(void)
{ {
@ -45,13 +49,35 @@ static void nfc_wait_ready(void)
writew(tmp, &nfc->nand_flash_config2); writew(tmp, &nfc->nand_flash_config2);
} }
static void nfc_nand_init(void) void nfc_nand_init(void)
{ {
#if defined(MXC_NFC_V1_1)
int ecc_per_page = CONFIG_SYS_NAND_PAGE_SIZE / 512;
int config1;
writew(CONFIG_SYS_NAND_SPARE_SIZE / 2, &nfc->spare_area_size);
/* unlocking RAM Buff */
writew(0x2, &nfc->configuration);
/* hardware ECC checking and correct */
config1 = readw(&nfc->nand_flash_config1) | NFC_ECC_EN | 0x800;
/*
* if spare size is larger that 16 bytes per 512 byte hunk
* then use 8 symbol correction instead of 4
*/
if ((CONFIG_SYS_NAND_SPARE_SIZE / ecc_per_page) > 16)
config1 &= ~NFC_4_8N_ECC;
else
config1 |= NFC_4_8N_ECC;
writew(config1, &nfc->nand_flash_config1);
#elif defined(MXC_NFC_V1)
/* unlocking RAM Buff */ /* unlocking RAM Buff */
writew(0x2, &nfc->configuration); writew(0x2, &nfc->configuration);
/* hardware ECC checking and correct */ /* hardware ECC checking and correct */
writew(NFC_ECC_EN, &nfc->nand_flash_config1); writew(NFC_ECC_EN, &nfc->nand_flash_config1);
#endif
} }
static void nfc_nand_command(unsigned short command) static void nfc_nand_command(unsigned short command)
@ -65,12 +91,12 @@ static void nfc_nand_page_address(unsigned int page_address)
{ {
unsigned int page_count; unsigned int page_count;
writew(0x00, &nfc->flash_cmd); writew(0x00, &nfc->flash_add);
writew(NFC_ADDR, &nfc->nand_flash_config2); writew(NFC_ADDR, &nfc->nand_flash_config2);
nfc_wait_ready(); nfc_wait_ready();
/* code only for 2kb flash */ /* code only for large page flash */
if (CONFIG_SYS_NAND_PAGE_SIZE == 0x800) { if (CONFIG_SYS_NAND_PAGE_SIZE > 512) {
writew(0x00, &nfc->flash_add); writew(0x00, &nfc->flash_add);
writew(NFC_ADDR, &nfc->nand_flash_config2); writew(NFC_ADDR, &nfc->nand_flash_config2);
nfc_wait_ready(); nfc_wait_ready();
@ -88,22 +114,38 @@ static void nfc_nand_page_address(unsigned int page_address)
page_count = page_count >> 8; page_count = page_count >> 8;
} while (page_count); } while (page_count);
} }
writew(0x00, &nfc->flash_add);
writew(NFC_ADDR, &nfc->nand_flash_config2);
nfc_wait_ready();
} }
static void nfc_nand_data_output(void) static void nfc_nand_data_output(void)
{ {
int config1 = readw(&nfc->nand_flash_config1);
#ifdef NAND_MXC_2K_MULTI_CYCLE
int i; int i;
#endif
config1 |= NFC_ECC_EN | NFC_INT_MSK;
writew(config1, &nfc->nand_flash_config1);
writew(0, &nfc->buffer_address);
writew(NFC_OUTPUT, &nfc->nand_flash_config2);
nfc_wait_ready();
#ifdef NAND_MXC_2K_MULTI_CYCLE
/* /*
* The NAND controller requires four output commands for * This NAND controller requires multiple input commands
* large page devices. * for pages larger than 512 bytes.
*/ */
for (i = 0; i < (CONFIG_SYS_NAND_PAGE_SIZE / 512); i++) { for (i = 1; i < (CONFIG_SYS_NAND_PAGE_SIZE / 512); i++) {
writew(NFC_ECC_EN, &nfc->nand_flash_config1); config1 = readw(&nfc->nand_flash_config1);
writew(i, &nfc->buffer_address); /* read in i:th buffer */ config1 |= NFC_ECC_EN | NFC_INT_MSK;
writew(config1, &nfc->nand_flash_config1);
writew(i, &nfc->buffer_address);
writew(NFC_OUTPUT, &nfc->nand_flash_config2); writew(NFC_OUTPUT, &nfc->nand_flash_config2);
nfc_wait_ready(); nfc_wait_ready();
} }
#endif
} }
static int nfc_nand_check_ecc(void) static int nfc_nand_check_ecc(void)
@ -121,7 +163,7 @@ static int nfc_read_page(unsigned int page_address, unsigned char *buf)
nfc_nand_command(NAND_CMD_READ0); nfc_nand_command(NAND_CMD_READ0);
nfc_nand_page_address(page_address); nfc_nand_page_address(page_address);
if (CONFIG_SYS_NAND_PAGE_SIZE == 0x800) if (CONFIG_SYS_NAND_PAGE_SIZE > 512)
nfc_nand_command(NAND_CMD_READSTART); nfc_nand_command(NAND_CMD_READSTART);
nfc_nand_data_output(); /* fill the main buffer 0 */ nfc_nand_data_output(); /* fill the main buffer 0 */
@ -129,7 +171,7 @@ static int nfc_read_page(unsigned int page_address, unsigned char *buf)
if (nfc_nand_check_ecc()) if (nfc_nand_check_ecc())
return -1; return -1;
src = &nfc->main_area0[0]; src = &nfc->main_area[0][0];
dst = (u32 *)buf; dst = (u32 *)buf;
/* main copy loop from NAND-buffer to SDRAM memory */ /* main copy loop from NAND-buffer to SDRAM memory */
@ -154,12 +196,12 @@ static int is_badblock(int pagenumber)
nfc_nand_command(NAND_CMD_READ0); nfc_nand_command(NAND_CMD_READ0);
nfc_nand_page_address(page); nfc_nand_page_address(page);
if (CONFIG_SYS_NAND_PAGE_SIZE == 0x800) if (CONFIG_SYS_NAND_PAGE_SIZE > 512)
nfc_nand_command(NAND_CMD_READSTART); nfc_nand_command(NAND_CMD_READSTART);
nfc_nand_data_output(); /* fill the main buffer 0 */ nfc_nand_data_output(); /* fill the main buffer 0 */
src = &nfc->spare_area0[0]; src = &nfc->spare_area[0][0];
/* /*
* IMPORTANT NOTE: The nand flash controller uses a non- * IMPORTANT NOTE: The nand flash controller uses a non-
@ -209,7 +251,7 @@ static int nand_load(unsigned int from, unsigned int size, unsigned char *buf)
if (!(page % CONFIG_SYS_NAND_PAGE_COUNT)) { if (!(page % CONFIG_SYS_NAND_PAGE_COUNT)) {
/* /*
* Yes, new block. See if this block is good. If not, * Yes, new block. See if this block is good. If not,
* loop until we find i good block. * loop until we find a good block.
*/ */
while (is_badblock(page)) { while (is_badblock(page)) {
page = page + CONFIG_SYS_NAND_PAGE_COUNT; page = page + CONFIG_SYS_NAND_PAGE_COUNT;