diff options
| -rw-r--r-- | flash.h | 9 | ||||
| -rw-r--r-- | spi.c | 83 |
2 files changed, 71 insertions, 21 deletions
@@ -452,19 +452,20 @@ int probe_spi_rdid4(struct flashchip *flash); int probe_spi_res(struct flashchip *flash); int spi_command(unsigned int writecnt, unsigned int readcnt, const unsigned char *writearr, unsigned char *readarr); -void spi_write_enable(); -void spi_write_disable(); +int spi_write_enable(); +int spi_write_disable(); int spi_chip_erase_60(struct flashchip *flash); int spi_chip_erase_c7(struct flashchip *flash); +int spi_chip_erase_60_c7(struct flashchip *flash); int spi_chip_erase_d8(struct flashchip *flash); int spi_block_erase_52(const struct flashchip *flash, unsigned long addr); int spi_block_erase_d8(const struct flashchip *flash, unsigned long addr); int spi_chip_write(struct flashchip *flash, uint8_t *buf); int spi_chip_read(struct flashchip *flash, uint8_t *buf); uint8_t spi_read_status_register(); -void spi_disable_blockprotect(void); +int spi_disable_blockprotect(void); void spi_byte_program(int address, uint8_t byte); -void spi_nbyte_read(int address, uint8_t *bytes, int len); +int spi_nbyte_read(int address, uint8_t *bytes, int len); /* 82802ab.c */ int probe_82802ab(struct flashchip *flash); @@ -71,20 +71,20 @@ static int spi_res(unsigned char *readarr) return 0; } -void spi_write_enable() +int spi_write_enable() { const unsigned char cmd[JEDEC_WREN_OUTSIZE] = { JEDEC_WREN }; /* Send WREN (Write Enable) */ - spi_command(sizeof(cmd), 0, cmd, NULL); + return spi_command(sizeof(cmd), 0, cmd, NULL); } -void spi_write_disable() +int spi_write_disable() { const unsigned char cmd[JEDEC_WRDI_OUTSIZE] = { JEDEC_WRDI }; /* Send WRDI (Write Disable) */ - spi_command(sizeof(cmd), 0, cmd, NULL); + return spi_command(sizeof(cmd), 0, cmd, NULL); } static int probe_spi_rdid_generic(struct flashchip *flash, int bytes) @@ -274,14 +274,28 @@ void spi_prettyprint_status_register(struct flashchip *flash) int spi_chip_erase_60(struct flashchip *flash) { const unsigned char cmd[JEDEC_CE_60_OUTSIZE] = {JEDEC_CE_60}; + int result; - spi_disable_blockprotect(); - spi_write_enable(); + result = spi_disable_blockprotect(); + if (result) { + printf_debug("spi_disable_blockprotect failed\n"); + return result; + } + result = spi_write_enable(); + if (result) { + printf_debug("spi_write_enable failed\n"); + return result; + } /* Send CE (Chip Erase) */ - spi_command(sizeof(cmd), 0, cmd, NULL); + result = spi_command(sizeof(cmd), 0, cmd, NULL); + if (result) { + printf_debug("spi_chip_erase_60 failed sending erase\n"); + return result; + } /* Wait until the Write-In-Progress bit is cleared. * This usually takes 1-85 s, so wait in 1 s steps. */ + /* FIXME: We assume spi_read_status_register will never fail. */ while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP) sleep(1); return 0; @@ -290,19 +304,44 @@ int spi_chip_erase_60(struct flashchip *flash) int spi_chip_erase_c7(struct flashchip *flash) { const unsigned char cmd[JEDEC_CE_C7_OUTSIZE] = { JEDEC_CE_C7 }; + int result; - spi_disable_blockprotect(); - spi_write_enable(); + result = spi_disable_blockprotect(); + if (result) { + printf_debug("spi_disable_blockprotect failed\n"); + return result; + } + result = spi_write_enable(); + if (result) { + printf_debug("spi_write_enable failed\n"); + return result; + } /* Send CE (Chip Erase) */ - spi_command(sizeof(cmd), 0, cmd, NULL); + result = spi_command(sizeof(cmd), 0, cmd, NULL); + if (result) { + printf_debug("spi_chip_erase_60 failed sending erase\n"); + return result; + } /* Wait until the Write-In-Progress bit is cleared. * This usually takes 1-85 s, so wait in 1 s steps. */ + /* FIXME: We assume spi_read_status_register will never fail. */ while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP) sleep(1); return 0; } +int spi_chip_erase_60_c7(struct flashchip *flash) +{ + int result; + result = spi_chip_erase_60(flash); + if (result) { + printf_debug("spi_chip_erase_60 failed, trying c7\n"); + result = spi_chip_erase_c7(flash); + } + return result; +} + int spi_block_erase_52(const struct flashchip *flash, unsigned long addr) { unsigned char cmd[JEDEC_BE_52_OUTSIZE] = {JEDEC_BE_52}; @@ -390,13 +429,13 @@ int spi_sector_erase(const struct flashchip *flash, unsigned long addr) * This is according the SST25VF016 datasheet, who knows it is more * generic that this... */ -void spi_write_status_register(int status) +int spi_write_status_register(int status) { const unsigned char cmd[JEDEC_WRSR_OUTSIZE] = { JEDEC_WRSR, (unsigned char)status }; /* Send WRSR (Write Status Register) */ - spi_command(sizeof(cmd), 0, cmd, NULL); + return spi_command(sizeof(cmd), 0, cmd, NULL); } void spi_byte_program(int address, uint8_t byte) @@ -413,20 +452,30 @@ void spi_byte_program(int address, uint8_t byte) spi_command(sizeof(cmd), 0, cmd, NULL); } -void spi_disable_blockprotect(void) +int spi_disable_blockprotect(void) { uint8_t status; + int result; status = spi_read_status_register(); /* If there is block protection in effect, unprotect it first. */ if ((status & 0x3c) != 0) { printf_debug("Some block protection in effect, disabling\n"); - spi_write_enable(); - spi_write_status_register(status & ~0x3c); + result = spi_write_enable(); + if (result) { + printf_debug("spi_write_enable failed\n"); + return result; + } + result = spi_write_status_register(status & ~0x3c); + if (result) { + printf_debug("spi_write_status_register failed\n"); + return result; + } } + return 0; } -void spi_nbyte_read(int address, uint8_t *bytes, int len) +int spi_nbyte_read(int address, uint8_t *bytes, int len) { const unsigned char cmd[JEDEC_READ_OUTSIZE] = { JEDEC_READ, @@ -436,7 +485,7 @@ void spi_nbyte_read(int address, uint8_t *bytes, int len) }; /* Send Read */ - spi_command(sizeof(cmd), len, cmd, bytes); + return spi_command(sizeof(cmd), len, cmd, bytes); } int spi_chip_read(struct flashchip *flash, uint8_t *buf) |
