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 --- include/fsl_nfc.h | 86 ++++++++++++++++++++++++++++++++++++------ nand_spl/nand_boot_fsl_nfc.c | 72 ++++++++++++++++++++++++++++------- 2 files changed, 131 insertions(+), 27 deletions(-)
diff --git a/include/fsl_nfc.h b/include/fsl_nfc.h index da5be37..279aaa5 100644 --- a/include/fsl_nfc.h +++ b/include/fsl_nfc.h @@ -1,5 +1,4 @@ /* - * * (c) 2009 Magnus Lilja lilja.magnus@gmail.com * * See file CREDITS for list of people who contributed to this @@ -25,21 +24,57 @@ #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 - * 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 { - u32 main_area0[128]; /* @0x000 */ - u32 main_area1[128]; - u32 main_area2[128]; - u32 main_area3[128]; - u32 spare_area0[4]; - u32 spare_area1[4]; - u32 spare_area2[4]; - u32 spare_area3[4]; - u32 reserved1[64 - 16 + 64 * 5]; - u16 bufsiz; /* @ 0xe00 */ + u32 main_area[NAND_MXC_NR_BUFS][512/4]; + u32 spare_area[NAND_MXC_NR_BUFS][NAND_MXC_SPARE_BUF_SIZE/4]; + /* + * reserved size is offset of nfc registers + * minus total main and spare sizes + */ + u8 reserved1[NAND_MXC_REG_OFFSET + - NAND_MXC_NR_BUFS * (512 + NAND_MXC_SPARE_BUF_SIZE)]; +#if defined(MXC_NFC_V1) + u16 bufsiz; u16 reserved2; u16 buffer_address; u16 flash_add; @@ -54,6 +89,30 @@ struct fsl_nfc_regs { u16 nand_flash_wr_pr_st; u16 nand_flash_config1; 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
+#ifdef MXC_NFC_V1_1 +#define NFC_4_8N_ECC (1 << 0) +#endif #define NFC_SP_EN (1 << 2) #define NFC_ECC_EN (1 << 3) #define NFC_INT_MSK (1 << 4) diff --git a/nand_spl/nand_boot_fsl_nfc.c b/nand_spl/nand_boot_fsl_nfc.c index a9df2a8..f4040a7 100644 --- a/nand_spl/nand_boot_fsl_nfc.c +++ b/nand_spl/nand_boot_fsl_nfc.c @@ -26,11 +26,15 @@
#include <common.h> #include <nand.h> +#ifdef CONFIG_MX31 #include <asm-arm/arch/mx31-regs.h> +#else +#include <asm-arm/arch/imx-regs.h> +#endif #include <asm/io.h> #include <fsl_nfc.h>
-static struct fsl_nfc_regs *nfc; +struct fsl_nfc_regs *nfc;
static void nfc_wait_ready(void) { @@ -45,13 +49,35 @@ static void nfc_wait_ready(void) 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 */ writew(0x2, &nfc->configuration);
/* hardware ECC checking and correct */ writew(NFC_ECC_EN, &nfc->nand_flash_config1); +#endif }
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;
- writew(0x00, &nfc->flash_cmd); + writew(0x00, &nfc->flash_add); writew(NFC_ADDR, &nfc->nand_flash_config2); nfc_wait_ready();
- /* code only for 2kb flash */ - if (CONFIG_SYS_NAND_PAGE_SIZE == 0x800) { + /* code only for large page flash */ + if (CONFIG_SYS_NAND_PAGE_SIZE > 512) { writew(0x00, &nfc->flash_add); writew(NFC_ADDR, &nfc->nand_flash_config2); nfc_wait_ready(); @@ -88,22 +114,38 @@ static void nfc_nand_page_address(unsigned int page_address) page_count = page_count >> 8; } 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) { + int config1 = readw(&nfc->nand_flash_config1); +#ifdef NAND_MXC_2K_MULTI_CYCLE 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 - * large page devices. + * This NAND controller requires multiple input commands + * for pages larger than 512 bytes. */ - for (i = 0; i < (CONFIG_SYS_NAND_PAGE_SIZE / 512); i++) { - writew(NFC_ECC_EN, &nfc->nand_flash_config1); - writew(i, &nfc->buffer_address); /* read in i:th buffer */ + for (i = 1; i < (CONFIG_SYS_NAND_PAGE_SIZE / 512); i++) { + config1 = readw(&nfc->nand_flash_config1); + 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); nfc_wait_ready(); } +#endif }
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_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_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()) return -1;
- src = &nfc->main_area0[0]; + src = &nfc->main_area[0][0]; dst = (u32 *)buf;
/* 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_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_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- @@ -209,7 +251,7 @@ static int nand_load(unsigned int from, unsigned int size, unsigned char *buf) if (!(page % CONFIG_SYS_NAND_PAGE_COUNT)) { /* * 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)) { page = page + CONFIG_SYS_NAND_PAGE_COUNT;