In kernel Bugzilla #15825 (2 users), in a wireless mailing list thread (http://lists.infradead.org/pipermail/b43-dev/2010-May/000124.html), and on a netbook owned by John Linville (http://marc.info/?l=linux-wireless&m=127230751408818&w=4), there are reports of ssb failing to detect an SPROM at the normal location. After studying the MMIO trace dump for the Broadcom wl driver, it was determined that the affected boxes had a relocated SPROM. This patch fixes all systems that have reported this problem. Signed-off-by: Larry Finger <Larry.Finger@xxxxxxxxxxxx> Cc: Stable <stable@xxxxxxxxxx> --- John, This patch and the one by Gabor entitled "[PATCH] ssb: Implement fast powerup delay calculation" are needed to fix these systems. As there is the possibility that this patch will break some 14e4:4315 devices, it should stew in testing for a while. I am confident enough in it to add the Cc for stable. Larry --- Index: wireless-testing/drivers/ssb/pci.c =================================================================== --- wireless-testing.orig/drivers/ssb/pci.c +++ wireless-testing/drivers/ssb/pci.c @@ -631,8 +631,17 @@ static int ssb_pci_sprom_get(struct ssb_ return -ENODEV; } - bus->sprom_offset = (bus->chipco.dev->id.revision < 31) ? - SSB_SPROM_BASE1 : SSB_SPROM_BASE31; + /* get SPROM offset: SSB_SPROM_BASE1 except for chipcommon rev >= 31 + * or chip ID is 0x4312 and chipcommon status & 3 == 2 + */ + if (bus->chipco.dev->id.revision >= 31) + bus->sprom_offset = SSB_SPROM_BASE31; + else if (bus->chip_id == 0x4312 && (bus->chipco.status & 0x03) == 2) + bus->sprom_offset = SSB_SPROM_BASE31; + else + bus->sprom_offset = SSB_SPROM_BASE1; + + ssb_dprintk(KERN_INFO PFX "SPROM offset is 0x%x\n", bus->sprom_offset); buf = kcalloc(SSB_SPROMSIZE_WORDS_R123, sizeof(u16), GFP_KERNEL); if (!buf) Index: wireless-testing/drivers/ssb/driver_chipcommon.c =================================================================== --- wireless-testing.orig/drivers/ssb/driver_chipcommon.c +++ wireless-testing/drivers/ssb/driver_chipcommon.c @@ -252,15 +252,17 @@ void ssb_chipcommon_init(struct ssb_chip { u16 delay; + cc->status = 0; if (!cc->dev) return; /* We don't have a ChipCommon */ if (cc->dev->id.revision >= 11) cc->status = chipco_read32(cc, SSB_CHIPCO_CHIPSTAT); + ssb_dprintk(KERN_INFO PFX "chipcommon status is 0x%x\n", cc->status); ssb_pmu_init(cc); chipco_powercontrol_init(cc); ssb_chipco_set_clockmode(cc, SSB_CLKMODE_FAST); delay = calc_fast_powerup_delay(cc); - ssb_printk(KERN_INFO PFX "fast_pwrup_delay is %d\n", delay); + ssb_dprintk(KERN_INFO PFX "fast_pwrup_delay is %d\n", delay); cc->fast_pwrup_delay = delay; ssb_write16(cc->dev, SSB_MMIO_POWERUP_DELAY, delay); } -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
