diff options
Diffstat (limited to 'drivers/bcma')
| -rw-r--r-- | drivers/bcma/sprom.c | 71 |
1 files changed, 39 insertions, 32 deletions
diff --git a/drivers/bcma/sprom.c b/drivers/bcma/sprom.c index 8934298a638d..de15b4f4b237 100644 --- a/drivers/bcma/sprom.c +++ b/drivers/bcma/sprom.c @@ -72,12 +72,12 @@ fail: * R/W ops. **************************************************/ -static void bcma_sprom_read(struct bcma_bus *bus, u16 offset, u16 *sprom) +static void bcma_sprom_read(struct bcma_bus *bus, u16 offset, u16 *sprom, + size_t words) { int i; - for (i = 0; i < SSB_SPROMSIZE_WORDS_R4; i++) - sprom[i] = bcma_read16(bus->drv_cc.core, - offset + (i * 2)); + for (i = 0; i < words; i++) + sprom[i] = bcma_read16(bus->drv_cc.core, offset + (i * 2)); } /************************************************** @@ -124,29 +124,29 @@ static inline u8 bcma_crc8(u8 crc, u8 data) return t[crc ^ data]; } -static u8 bcma_sprom_crc(const u16 *sprom) +static u8 bcma_sprom_crc(const u16 *sprom, size_t words) { int word; u8 crc = 0xFF; - for (word = 0; word < SSB_SPROMSIZE_WORDS_R4 - 1; word++) { + for (word = 0; word < words - 1; word++) { crc = bcma_crc8(crc, sprom[word] & 0x00FF); crc = bcma_crc8(crc, (sprom[word] & 0xFF00) >> 8); } - crc = bcma_crc8(crc, sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & 0x00FF); + crc = bcma_crc8(crc, sprom[words - 1] & 0x00FF); crc ^= 0xFF; return crc; } -static int bcma_sprom_check_crc(const u16 *sprom) +static int bcma_sprom_check_crc(const u16 *sprom, size_t words) { u8 crc; u8 expected_crc; u16 tmp; - crc = bcma_sprom_crc(sprom); - tmp = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & SSB_SPROM_REVISION_CRC; + crc = bcma_sprom_crc(sprom, words); + tmp = sprom[words - 1] & SSB_SPROM_REVISION_CRC; expected_crc = tmp >> SSB_SPROM_REVISION_CRC_SHIFT; if (crc != expected_crc) return -EPROTO; @@ -154,21 +154,25 @@ static int bcma_sprom_check_crc(const u16 *sprom) return 0; } -static int bcma_sprom_valid(const u16 *sprom) +static int bcma_sprom_valid(struct bcma_bus *bus, const u16 *sprom, + size_t words) { u16 revision; int err; - err = bcma_sprom_check_crc(sprom); + err = bcma_sprom_check_crc(sprom, words); if (err) return err; - revision = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & SSB_SPROM_REVISION_REV; - if (revision != 8 && revision != 9) { + revision = sprom[words - 1] & SSB_SPROM_REVISION_REV; + if (revision != 8 && revision != 9 && revision != 10) { pr_err("Unsupported SPROM revision: %d\n", revision); return -ENOENT; } + bus->sprom.revision = revision; + bcma_debug(bus, "Found SPROM revision %d\n", revision); + return 0; } @@ -208,9 +212,6 @@ static void bcma_sprom_extract_r8(struct bcma_bus *bus, const u16 *sprom) BUILD_BUG_ON(ARRAY_SIZE(pwr_info_offset) != ARRAY_SIZE(bus->sprom.core_pwr_info)); - bus->sprom.revision = sprom[SSB_SPROMSIZE_WORDS_R4 - 1] & - SSB_SPROM_REVISION_REV; - for (i = 0; i < 3; i++) { v = sprom[SPOFF(SSB_SPROM8_IL0MAC) + i]; *(((__be16 *)bus->sprom.il0mac) + i) = cpu_to_be16(v); @@ -502,7 +503,6 @@ static bool bcma_sprom_onchip_available(struct bcma_bus *bus) case BCMA_CHIP_ID_BCM4331: present = chip_status & BCMA_CC_CHIPST_4331_OTP_PRESENT; break; - case BCMA_CHIP_ID_BCM43224: case BCMA_CHIP_ID_BCM43225: /* for these chips OTP is always available */ @@ -550,7 +550,9 @@ int bcma_sprom_get(struct bcma_bus *bus) { u16 offset = BCMA_CC_SPROM; u16 *sprom; - int err = 0; + size_t sprom_sizes[] = { SSB_SPROMSIZE_WORDS_R4, + SSB_SPROMSIZE_WORDS_R10, }; + int i, err = 0; if (!bus->drv_cc.core) return -EOPNOTSUPP; @@ -579,32 +581,37 @@ int bcma_sprom_get(struct bcma_bus *bus) } } - sprom = kcalloc(SSB_SPROMSIZE_WORDS_R4, sizeof(u16), - GFP_KERNEL); - if (!sprom) - return -ENOMEM; - if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4331 || bus->chipinfo.id == BCMA_CHIP_ID_BCM43431) bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, false); bcma_debug(bus, "SPROM offset 0x%x\n", offset); - bcma_sprom_read(bus, offset, sprom); + for (i = 0; i < ARRAY_SIZE(sprom_sizes); i++) { + size_t words = sprom_sizes[i]; + + sprom = kcalloc(words, sizeof(u16), GFP_KERNEL); + if (!sprom) + return -ENOMEM; + + bcma_sprom_read(bus, offset, sprom, words); + err = bcma_sprom_valid(bus, sprom, words); + if (!err) + break; + + kfree(sprom); + } if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4331 || bus->chipinfo.id == BCMA_CHIP_ID_BCM43431) bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, true); - err = bcma_sprom_valid(sprom); if (err) { - bcma_warn(bus, "invalid sprom read from the PCIe card, try to use fallback sprom\n"); + bcma_warn(bus, "Invalid SPROM read from the PCIe card, trying to use fallback SPROM\n"); err = bcma_fill_sprom_with_fallback(bus, &bus->sprom); - goto out; + } else { + bcma_sprom_extract_r8(bus, sprom); + kfree(sprom); } - bcma_sprom_extract_r8(bus, sprom); - -out: - kfree(sprom); return err; } |