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bcma: implement BCM4331 workaround for external PA lines

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We need to disable ext. PA lines for reading SPROM. It's disabled by
default, but this patch allows using bcma after loading wl, which leaves
workaround enabled.

Cc: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rafał Miłecki
2011-08-11 23:46:44 +02:00
committed by John W. Linville
parent 17030f48e3
commit 984e5befba
3 changed files with 43 additions and 1 deletions
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20
drivers/bcma/driver_chipcommon_pmu.c
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@@ -90,6 +90,24 @@ void bcma_pmu_swreg_init(struct bcma_drv_cc *cc)
}
}
/* Disable to allow reading SPROM. Don't know the adventages of enabling it. */
void bcma_chipco_bcm4331_ext_pa_lines_ctl(struct bcma_drv_cc *cc, bool enable)
{
struct bcma_bus *bus = cc->core->bus;
u32 val;
val = bcma_cc_read32(cc, BCMA_CC_CHIPCTL);
if (enable) {
val |= BCMA_CHIPCTL_4331_EXTPA_EN;
if (bus->chipinfo.pkg == 9 || bus->chipinfo.pkg == 11)
val |= BCMA_CHIPCTL_4331_EXTPA_ON_GPIO2_5;
} else {
val &= ~BCMA_CHIPCTL_4331_EXTPA_EN;
val &= ~BCMA_CHIPCTL_4331_EXTPA_ON_GPIO2_5;
}
bcma_cc_write32(cc, BCMA_CC_CHIPCTL, val);
}
void bcma_pmu_workarounds(struct bcma_drv_cc *cc)
{
struct bcma_bus *bus = cc->core->bus;
@@ -99,7 +117,7 @@ void bcma_pmu_workarounds(struct bcma_drv_cc *cc)
bcma_chipco_chipctl_maskset(cc, 0, ~0, 0x7);
break;
case 0x4331:
pr_err("Enabling Ext PA lines not implemented\n");
/* BCM4331 workaround is SPROM-related, we put it in sprom.c */
break;
case 43224:
if (bus->chipinfo.rev == 0) {