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author | Rudolf Marek <r.marek@assembler.cz> | 2008-06-30 21:45:17 +0000 |
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committer | Rudolf Marek <r.marek@assembler.cz> | 2008-06-30 21:45:17 +0000 |
commit | dfb8f4008e76bc0fa0cb92d81b7e96a8532e8890 (patch) | |
tree | 6cfa6baf4bad98de5207cf7ed437331337207ec3 /spi.c | |
parent | bb42c576210ffe20cdafe3759966d783fb8480ac (diff) | |
download | flashrom-dfb8f4008e76bc0fa0cb92d81b7e96a8532e8890.zip flashrom-dfb8f4008e76bc0fa0cb92d81b7e96a8532e8890.tar.gz |
Mine AMIC flash chip needs 4 bytes RDID
Following patch adds support for that.
Corresponding to flashrom svn r283 and coreboot v2 svn r3399.
Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Acked-by: Peter Stuge <peter@stuge.se>
Diffstat (limited to 'spi.c')
-rw-r--r-- | spi.c | 29 |
1 files changed, 23 insertions, 6 deletions
@@ -44,11 +44,11 @@ int spi_command(unsigned int writecnt, unsigned int readcnt, const unsigned char return 1; } -static int spi_rdid(unsigned char *readarr) +static int spi_rdid(unsigned char *readarr, int bytes) { const unsigned char cmd[JEDEC_RDID_OUTSIZE] = {JEDEC_RDID}; - if (spi_command(JEDEC_RDID_OUTSIZE, JEDEC_RDID_INSIZE, cmd, readarr)) + if (spi_command(JEDEC_RDID_OUTSIZE, bytes, cmd, readarr)) return 1; printf_debug("RDID returned %02x %02x %02x.\n", readarr[0], readarr[1], readarr[2]); return 0; @@ -80,13 +80,13 @@ void spi_write_disable() spi_command(JEDEC_WRDI_OUTSIZE, JEDEC_WRDI_INSIZE, cmd, NULL); } -int probe_spi_rdid(struct flashchip *flash) +static int probe_spi_rdid_generic(struct flashchip *flash, int bytes) { - unsigned char readarr[3]; + unsigned char readarr[4]; uint32_t manuf_id; uint32_t model_id; - if (spi_rdid(readarr)) + if (spi_rdid(readarr, bytes)) return 0; if (!oddparity(readarr[0])) @@ -98,6 +98,10 @@ int probe_spi_rdid(struct flashchip *flash) printf_debug("RDID byte 1 parity violation.\n"); manuf_id = (readarr[0] << 8) | readarr[1]; model_id = readarr[2]; + if (bytes > 3) { + model_id <<= 8; + model_id |= readarr[3]; + } } else { manuf_id = readarr[0]; model_id = (readarr[1] << 8) | readarr[2]; @@ -123,12 +127,25 @@ int probe_spi_rdid(struct flashchip *flash) return 0; } +int probe_spi_rdid(struct flashchip *flash) { + return probe_spi_rdid_generic(flash, 3); +} + +/* support 4 bytes flash ID */ +int probe_spi_rdid4(struct flashchip *flash) { + + /* only some SPI chipsets support 4 bytes commands */ + if (!((ich7_detected) || (ich9_detected) || (viaspi_detected))) + return 0; + return probe_spi_rdid_generic(flash, 4); +} + int probe_spi_res(struct flashchip *flash) { unsigned char readarr[3]; uint32_t model_id; - if (spi_rdid(readarr)) + if (spi_rdid(readarr, 3)) /* We couldn't issue RDID, it's pointless to try RES. */ return 0; |