From f3e7a8c1413e44a625ec25abf06f7a4eb9c4be36 Mon Sep 17 00:00:00 2001 From: Larry Finger Date: Fri, 14 May 2010 22:08:58 -0500 Subject: ssb: Handle alternate SSPROM location commit 9d1ac34ec3a67713308ae0883c3359c557f14d17 upstream. 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 Signed-off-by: John W. Linville Cc: Ben Hutchings Signed-off-by: Greg Kroah-Hartman --- drivers/ssb/driver_chipcommon.c | 1 + drivers/ssb/pci.c | 15 +++++++++++++-- 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/ssb/driver_chipcommon.c b/drivers/ssb/driver_chipcommon.c index a55cff8524c7..bbf1cb21a7d3 100644 --- a/drivers/ssb/driver_chipcommon.c +++ b/drivers/ssb/driver_chipcommon.c @@ -235,6 +235,7 @@ void ssb_chipcommon_init(struct ssb_chipcommon *cc) 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); diff --git a/drivers/ssb/pci.c b/drivers/ssb/pci.c index 243db85dbdb8..321d9ef17b96 100644 --- a/drivers/ssb/pci.c +++ b/drivers/ssb/pci.c @@ -625,11 +625,22 @@ static int ssb_pci_sprom_get(struct ssb_bus *bus, return -ENODEV; } if (bus->chipco.dev) { /* can be unavailible! */ - 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; } 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) -- cgit v1.2.3