diff options
Diffstat (limited to 'spi.c')
| -rw-r--r-- | spi.c | 79 |
1 files changed, 70 insertions, 9 deletions
@@ -45,17 +45,31 @@ #define JEDEC_WRDI_OUTSIZE 0x01 #define JEDEC_WRDI_INSIZE 0x00 -/* Both Chip Erase commands below should work */ -/* Chip Erase 0x60 */ +/* Chip Erase 0x60 is supported by Macronix/SST chips. */ #define JEDEC_CE_1 {0x60}; #define JEDEC_CE_1_OUTSIZE 0x01 #define JEDEC_CE_1_INSIZE 0x00 -/* Chip Erase 0xc7 */ +/* Chip Erase 0xc7 is supported by EON/Macronix chips. */ #define JEDEC_CE_2 {0xc7}; #define JEDEC_CE_2_OUTSIZE 0x01 #define JEDEC_CE_2_INSIZE 0x00 +/* Block Erase 0x52 is supported by SST chips. */ +#define JEDEC_BE_1 {0x52}; +#define JEDEC_BE_1_OUTSIZE 0x04 +#define JEDEC_BE_1_INSIZE 0x00 + +/* Block Erase 0xd8 is supported by EON/Macronix chips. */ +#define JEDEC_BE_2 {0xd8}; +#define JEDEC_BE_2_OUTSIZE 0x04 +#define JEDEC_BE_2_INSIZE 0x00 + +/* Sector Erase 0x20 is supported by Macronix/SST chips. */ +#define JEDEC_SE {0x20}; +#define JEDEC_SE_OUTSIZE 0x04 +#define JEDEC_SE_INSIZE 0x00 + /* Read Status Register */ #define JEDEC_RDSR {0x05}; #define JEDEC_RDSR_OUTSIZE 0x01 @@ -144,7 +158,7 @@ int it87xx_probe_spi_flash(const char *name) whereas the IT8716F splits commands internally into address and non-address commands with the address in inverse wire order. That's why the register ordering in case 4 and 5 may seem strange. */ -static int it8716f_spi_command(uint16_t port, unsigned char writecnt, unsigned char readcnt, const unsigned char *writearr, unsigned char *readarr) +static int it8716f_spi_command(uint16_t port, unsigned int writecnt, unsigned int readcnt, const unsigned char *writearr, unsigned char *readarr) { uint8_t busy, writeenc; int i; @@ -188,7 +202,7 @@ static int it8716f_spi_command(uint16_t port, unsigned char writecnt, unsigned c return 1; } /* Start IO, 33MHz, readcnt input bytes, writecnt output bytes. Note: - * We can't use writecnt directly, but have to use a strange encoding + * We can't use writecnt directly, but have to use a strange encoding. */ outb((0x5 << 4) | ((readcnt & 0x3) << 2) | (writeenc), port); do { @@ -202,7 +216,7 @@ static int it8716f_spi_command(uint16_t port, unsigned char writecnt, unsigned c return 0; } -int generic_spi_command(unsigned char writecnt, unsigned char readcnt, const unsigned char *writearr, unsigned char *readarr) +int generic_spi_command(unsigned int writecnt, unsigned int readcnt, const unsigned char *writearr, unsigned char *readarr) { if (it8716f_flashport) return it8716f_spi_command(it8716f_flashport, writecnt, readcnt, writearr, readarr); @@ -269,13 +283,58 @@ int generic_spi_chip_erase(struct flashchip *flash) generic_spi_write_enable(); /* Send CE (Chip Erase) */ - generic_spi_command(1, 0, cmd, NULL); - /* Wait until the Write-In-Progress bit is cleared */ + generic_spi_command(JEDEC_CE_2_OUTSIZE, JEDEC_CE_2_INSIZE, cmd, NULL); + /* Wait until the Write-In-Progress bit is cleared. + * This usually takes 1-85 s, so wait in 1 s steps. + */ while (generic_spi_read_status_register() & JEDEC_RDSR_BIT_WIP) sleep(1); return 0; } +/* Block size is usually + * 64k for Macronix + * 32k for SST + * 4-32k non-uniform for EON + */ +int generic_spi_block_erase(const struct flashchip *flash, unsigned long addr) +{ + unsigned char cmd[JEDEC_BE_2_OUTSIZE] = JEDEC_BE_2; + + cmd[1] = (addr & 0x00ff0000) >> 16; + cmd[2] = (addr & 0x0000ff00) >> 8; + cmd[3] = (addr & 0x000000ff); + generic_spi_write_enable(); + /* Send BE (Block Erase) */ + generic_spi_command(JEDEC_BE_2_OUTSIZE, JEDEC_BE_2_INSIZE, cmd, NULL); + /* Wait until the Write-In-Progress bit is cleared. + * This usually takes 100-4000 ms, so wait in 100 ms steps. + */ + while (generic_spi_read_status_register() & JEDEC_RDSR_BIT_WIP) + usleep(100 * 1000); + return 0; +} + +/* Sector size is usually 4k, though Macronix eliteflash has 64k */ +int generic_spi_sector_erase(const struct flashchip *flash, unsigned long addr) +{ + unsigned char cmd[JEDEC_SE_OUTSIZE] = JEDEC_SE; + cmd[1] = (addr & 0x00ff0000) >> 16; + cmd[2] = (addr & 0x0000ff00) >> 8; + cmd[3] = (addr & 0x000000ff); + + generic_spi_write_enable(); + /* Send SE (Sector Erase) */ + generic_spi_command(JEDEC_SE_OUTSIZE, JEDEC_SE_INSIZE, cmd, NULL); + /* Wait until the Write-In-Progress bit is cleared. + * This usually takes 15-800 ms, so wait in 10 ms steps. + */ + while (generic_spi_read_status_register() & JEDEC_RDSR_BIT_WIP) + usleep(10 * 1000); + return 0; +} + +/* Page size is usually 256 bytes */ void it8716f_spi_page_program(int block, uint8_t *buf, uint8_t *bios) { int i; @@ -286,7 +345,9 @@ void it8716f_spi_page_program(int block, uint8_t *buf, uint8_t *bios) { bios[256 * block + i] = buf[256 * block + i]; } outb(0, it8716f_flashport); - /* Wait until the Write-In-Progress bit is cleared */ + /* Wait until the Write-In-Progress bit is cleared. + * This usually takes 1-10 ms, so wait in 1 ms steps. + */ while (generic_spi_read_status_register() & JEDEC_RDSR_BIT_WIP) usleep(1000); } |
