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ssb: Implement PMU LDO control and use it in b43 

Implement the "PMU LDO set voltage" and "PMU LDO PA ref enable"
functions, and use them during LP-PHY baseband init in b43.

Signed-off-by: Gábor Stefanik <netrolller.3d@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
hifive-unleashed-5.1
Gábor Stefanik 2009-08-26 20:51:26 +02:00 committed by John W. Linville
parent 68ec53292c
commit 06e4da268c
3 changed files with 107 additions and 7 deletions
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10
drivers/net/wireless/b43/phy_lp.c
View File

@ -234,19 +234,15 @@ static void lpphy_baseband_rev0_1_init(struct b43_wldev *dev)
if ((bus->sprom.boardflags_lo & B43_BFL_FEM) &&
((b43_current_band(dev->wl) == IEEE80211_BAND_5GHZ) ||
(bus->sprom.boardflags_hi & B43_BFH_PAREF))) {
/* TODO:
* Set the LDO voltage to 0x0028 - FIXME: What is this?
* Call sb_pmu_set_ldo_voltage with 4 and the LDO voltage
* as arguments
* Call sb_pmu_paref_ldo_enable with argument TRUE
*/
ssb_pmu_set_ldo_voltage(&bus->chipco, LDO_PAREF, 0x28);
ssb_pmu_set_ldo_paref(&bus->chipco, true);
if (dev->phy.rev == 0) {
b43_phy_maskset(dev, B43_LPPHY_LP_RF_SIGNAL_LUT,
0xFFCF, 0x0010);
}
b43_lptab_write(dev, B43_LPTAB16(11, 7), 60);
} else {
//TODO: Call ssb_pmu_paref_ldo_enable with argument FALSE
ssb_pmu_set_ldo_paref(&bus->chipco, false);
b43_phy_maskset(dev, B43_LPPHY_LP_RF_SIGNAL_LUT,
0xFFCF, 0x0020);
b43_lptab_write(dev, B43_LPTAB16(11, 7), 100);

94
drivers/ssb/driver_chipcommon_pmu.c
View File

@ -28,6 +28,21 @@ static void ssb_chipco_pll_write(struct ssb_chipcommon *cc,
chipco_write32(cc, SSB_CHIPCO_PLLCTL_DATA, value);
}
static void ssb_chipco_regctl_maskset(struct ssb_chipcommon *cc,
u32 offset, u32 mask, u32 set)
{
u32 value;
chipco_read32(cc, SSB_CHIPCO_REGCTL_ADDR);
chipco_write32(cc, SSB_CHIPCO_REGCTL_ADDR, offset);
chipco_read32(cc, SSB_CHIPCO_REGCTL_ADDR);
value = chipco_read32(cc, SSB_CHIPCO_REGCTL_DATA);
value &= mask;
value |= set;
chipco_write32(cc, SSB_CHIPCO_REGCTL_DATA, value);
chipco_read32(cc, SSB_CHIPCO_REGCTL_DATA);
}
struct pmu0_plltab_entry {
u16 freq; /* Crystal frequency in kHz.*/
u8 xf; /* Crystal frequency value for PMU control */
@ -506,3 +521,82 @@ void ssb_pmu_init(struct ssb_chipcommon *cc)
ssb_pmu_pll_init(cc);
ssb_pmu_resources_init(cc);
}
void ssb_pmu_set_ldo_voltage(struct ssb_chipcommon *cc,
enum ssb_pmu_ldo_volt_id id, u32 voltage)
{
struct ssb_bus *bus = cc->dev->bus;
u32 addr, shift, mask;
switch (bus->chip_id) {
case 0x4328:
case 0x5354:
switch (id) {
case LDO_VOLT1:
addr = 2;
shift = 25;
mask = 0xF;
break;
case LDO_VOLT2:
addr = 3;
shift = 1;
mask = 0xF;
break;
case LDO_VOLT3:
addr = 3;
shift = 9;
mask = 0xF;
break;
case LDO_PAREF:
addr = 3;
shift = 17;
mask = 0x3F;
break;
default:
SSB_WARN_ON(1);
return;
}
break;
case 0x4312:
if (SSB_WARN_ON(id != LDO_PAREF))
return;
addr = 0;
shift = 21;
mask = 0x3F;
break;
default:
return;
}
ssb_chipco_regctl_maskset(cc, addr, ~(mask << shift),
(voltage & mask) << shift);
}
void ssb_pmu_set_ldo_paref(struct ssb_chipcommon *cc, bool on)
{
struct ssb_bus *bus = cc->dev->bus;
int ldo;
switch (bus->chip_id) {
case 0x4312:
ldo = SSB_PMURES_4312_PA_REF_LDO;
break;
case 0x4328:
ldo = SSB_PMURES_4328_PA_REF_LDO;
break;
case 0x5354:
ldo = SSB_PMURES_5354_PA_REF_LDO;
break;
default:
return;
}
if (on)
chipco_set32(cc, SSB_CHIPCO_PMU_MINRES_MSK, 1 << ldo);
else
chipco_mask32(cc, SSB_CHIPCO_PMU_MINRES_MSK, ~(1 << ldo));
chipco_read32(cc, SSB_CHIPCO_PMU_MINRES_MSK); //SPEC FIXME found via mmiotrace - dummy read?
}
EXPORT_SYMBOL(ssb_pmu_set_ldo_voltage);
EXPORT_SYMBOL(ssb_pmu_set_ldo_paref);

10
include/linux/ssb/ssb_driver_chipcommon.h
View File

@ -629,5 +629,15 @@ extern int ssb_chipco_serial_init(struct ssb_chipcommon *cc,
/* PMU support */
extern void ssb_pmu_init(struct ssb_chipcommon *cc);
enum ssb_pmu_ldo_volt_id {
LDO_PAREF = 0,
LDO_VOLT1,
LDO_VOLT2,
LDO_VOLT3,
};
void ssb_pmu_set_ldo_voltage(struct ssb_chipcommon *cc,
enum ssb_pmu_ldo_volt_id id, u32 voltage);
void ssb_pmu_set_ldo_paref(struct ssb_chipcommon *cc, bool on);
#endif /* LINUX_SSB_CHIPCO_H_ */