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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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/bcma/driver_chipcommon_pmu.c
View File

@ -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) {

6
drivers/bcma/sprom.c
View File

@ -152,6 +152,9 @@ int bcma_sprom_get(struct bcma_bus *bus)
if (!sprom)
return -ENOMEM;
if (bus->chipinfo.id == 0x4331)
bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, false);
/* Most cards have SPROM moved by additional offset 0x30 (48 dwords).
* According to brcm80211 this applies to cards with PCIe rev >= 6
* TODO: understand this condition and use it */
@ -159,6 +162,9 @@ int bcma_sprom_get(struct bcma_bus *bus)
BCMA_CC_SPROM_PCIE6;
bcma_sprom_read(bus, offset, sprom);
if (bus->chipinfo.id == 0x4331)
bcma_chipco_bcm4331_ext_pa_lines_ctl(&bus->drv_cc, true);
err = bcma_sprom_valid(sprom);
if (err)
goto out;

18
include/linux/bcma/bcma_driver_chipcommon.h
View File

@ -283,6 +283,22 @@
#define BCMA_CC_PPL_PCHI_OFF 5
#define BCMA_CC_PPL_PCHI_MASK 0x0000003f
/* BCM4331 ChipControl numbers. */
#define BCMA_CHIPCTL_4331_BT_COEXIST BIT(0) /* 0 disable */
#define BCMA_CHIPCTL_4331_SECI BIT(1) /* 0 SECI is disabled (JATG functional) */
#define BCMA_CHIPCTL_4331_EXT_LNA BIT(2) /* 0 disable */
#define BCMA_CHIPCTL_4331_SPROM_GPIO13_15 BIT(3) /* sprom/gpio13-15 mux */
#define BCMA_CHIPCTL_4331_EXTPA_EN BIT(4) /* 0 ext pa disable, 1 ext pa enabled */
#define BCMA_CHIPCTL_4331_GPIOCLK_ON_SPROMCS BIT(5) /* set drive out GPIO_CLK on sprom_cs pin */
#define BCMA_CHIPCTL_4331_PCIE_MDIO_ON_SPROMCS BIT(6) /* use sprom_cs pin as PCIE mdio interface */
#define BCMA_CHIPCTL_4331_EXTPA_ON_GPIO2_5 BIT(7) /* aband extpa will be at gpio2/5 and sprom_dout */
#define BCMA_CHIPCTL_4331_OVR_PIPEAUXCLKEN BIT(8) /* override core control on pipe_AuxClkEnable */
#define BCMA_CHIPCTL_4331_OVR_PIPEAUXPWRDOWN BIT(9) /* override core control on pipe_AuxPowerDown */
#define BCMA_CHIPCTL_4331_PCIE_AUXCLKEN BIT(10) /* pcie_auxclkenable */
#define BCMA_CHIPCTL_4331_PCIE_PIPE_PLLDOWN BIT(11) /* pcie_pipe_pllpowerdown */
#define BCMA_CHIPCTL_4331_BT_SHD0_ON_GPIO4 BIT(16) /* enable bt_shd0 at gpio4 */
#define BCMA_CHIPCTL_4331_BT_SHD1_ON_GPIO5 BIT(17) /* enable bt_shd1 at gpio5 */
/* Data for the PMU, if available.
* Check availability with ((struct bcma_chipcommon)->capabilities & BCMA_CC_CAP_PMU)
*/
@ -342,6 +358,8 @@ extern void bcma_core_chipcommon_init(struct bcma_drv_cc *cc);
extern void bcma_chipco_suspend(struct bcma_drv_cc *cc);
extern void bcma_chipco_resume(struct bcma_drv_cc *cc);
void bcma_chipco_bcm4331_ext_pa_lines_ctl(struct bcma_drv_cc *cc, bool enable);
extern void bcma_chipco_watchdog_timer_set(struct bcma_drv_cc *cc,
u32 ticks);