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b43: Add NPHY channel switch code
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This adds code and table data for channel switching on NPHYs.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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Michael Buesch authored and David S. Miller committed Jan 28, 2008
1 parent 53a6e23 commit d159131
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Showing 5 changed files with 1,182 additions and 13 deletions.
70 changes: 68 additions & 2 deletions drivers/net/wireless/b43/nphy.c
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Original file line number Diff line number Diff line change
Expand Up @@ -35,12 +35,78 @@ void b43_nphy_xmitpower(struct b43_wldev *dev)
{//TODO
}

static void b43_chantab_radio_upload(struct b43_wldev *dev,
const struct b43_nphy_channeltab_entry *e)
{
b43_radio_write16(dev, B2055_PLL_REF, e->radio_pll_ref);
b43_radio_write16(dev, B2055_RF_PLLMOD0, e->radio_rf_pllmod0);
b43_radio_write16(dev, B2055_RF_PLLMOD1, e->radio_rf_pllmod1);
b43_radio_write16(dev, B2055_VCO_CAPTAIL, e->radio_vco_captail);
b43_radio_write16(dev, B2055_VCO_CAL1, e->radio_vco_cal1);
b43_radio_write16(dev, B2055_VCO_CAL2, e->radio_vco_cal2);
b43_radio_write16(dev, B2055_PLL_LFC1, e->radio_pll_lfc1);
b43_radio_write16(dev, B2055_PLL_LFR1, e->radio_pll_lfr1);
b43_radio_write16(dev, B2055_PLL_LFC2, e->radio_pll_lfc2);
b43_radio_write16(dev, B2055_LGBUF_CENBUF, e->radio_lgbuf_cenbuf);
b43_radio_write16(dev, B2055_LGEN_TUNE1, e->radio_lgen_tune1);
b43_radio_write16(dev, B2055_LGEN_TUNE2, e->radio_lgen_tune2);
b43_radio_write16(dev, B2055_C1_LGBUF_ATUNE, e->radio_c1_lgbuf_atune);
b43_radio_write16(dev, B2055_C1_LGBUF_GTUNE, e->radio_c1_lgbuf_gtune);
b43_radio_write16(dev, B2055_C1_RX_RFR1, e->radio_c1_rx_rfr1);
b43_radio_write16(dev, B2055_C1_TX_PGAPADTN, e->radio_c1_tx_pgapadtn);
b43_radio_write16(dev, B2055_C1_TX_MXBGTRIM, e->radio_c1_tx_mxbgtrim);
b43_radio_write16(dev, B2055_C2_LGBUF_ATUNE, e->radio_c2_lgbuf_atune);
b43_radio_write16(dev, B2055_C2_LGBUF_GTUNE, e->radio_c2_lgbuf_gtune);
b43_radio_write16(dev, B2055_C2_RX_RFR1, e->radio_c2_rx_rfr1);
b43_radio_write16(dev, B2055_C2_TX_PGAPADTN, e->radio_c2_tx_pgapadtn);
b43_radio_write16(dev, B2055_C2_TX_MXBGTRIM, e->radio_c2_tx_mxbgtrim);
}

static void b43_chantab_phy_upload(struct b43_wldev *dev,
const struct b43_nphy_channeltab_entry *e)
{
b43_phy_write(dev, B43_NPHY_BW1A, e->phy_bw1a);
b43_phy_write(dev, B43_NPHY_BW2, e->phy_bw2);
b43_phy_write(dev, B43_NPHY_BW3, e->phy_bw3);
b43_phy_write(dev, B43_NPHY_BW4, e->phy_bw4);
b43_phy_write(dev, B43_NPHY_BW5, e->phy_bw5);
b43_phy_write(dev, B43_NPHY_BW6, e->phy_bw6);
}

static void b43_nphy_tx_power_fix(struct b43_wldev *dev)
{
//TODO
}

/* Tune the hardware to a new channel. Don't call this directly.
* Use b43_radio_selectchannel() */
void b43_nphy_selectchannel(struct b43_wldev *dev, u8 channel)
int b43_nphy_selectchannel(struct b43_wldev *dev, u8 channel)
{
const struct b43_nphy_channeltab_entry *tabent;

//TODO
tabent = b43_nphy_get_chantabent(dev, channel);
if (!tabent)
return -ESRCH;

//FIXME enable/disable band select upper20 in RXCTL
if (0 /*FIXME 5Ghz*/)
b43_radio_maskset(dev, B2055_MASTER1, 0xFF8F, 0x20);
else
b43_radio_maskset(dev, B2055_MASTER1, 0xFF8F, 0x50);
b43_chantab_radio_upload(dev, tabent);
udelay(50);
b43_radio_write16(dev, B2055_VCO_CAL10, 5);
b43_radio_write16(dev, B2055_VCO_CAL10, 45);
b43_radio_write16(dev, B2055_VCO_CAL10, 65);
udelay(300);
if (0 /*FIXME 5Ghz*/)
b43_phy_set(dev, B43_NPHY_BANDCTL, B43_NPHY_BANDCTL_5GHZ);
else
b43_phy_mask(dev, B43_NPHY_BANDCTL, ~B43_NPHY_BANDCTL_5GHZ);
b43_chantab_phy_upload(dev, tabent);
b43_nphy_tx_power_fix(dev);

return 0;
}

static void b43_radio_init2055_pre(struct b43_wldev *dev)
Expand Down
3 changes: 2 additions & 1 deletion drivers/net/wireless/b43/nphy.h
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@
#define B43_NPHY_CHANNEL B43_PHY_N(0x005) /* Channel */
#define B43_NPHY_TXERR B43_PHY_N(0x007) /* TX error */
#define B43_NPHY_BANDCTL B43_PHY_N(0x009) /* Band control */
#define B43_NPHY_BANDCTL_5GHZ 0x0001 /* Use the 5GHz band */
#define B43_NPHY_4WI_ADDR B43_PHY_N(0x00B) /* Four-wire bus address */
#define B43_NPHY_4WI_DATAHI B43_PHY_N(0x00C) /* Four-wire bus data high */
#define B43_NPHY_4WI_DATALO B43_PHY_N(0x00D) /* Four-wire bus data low */
Expand Down Expand Up @@ -917,7 +918,7 @@ int b43_phy_initn(struct b43_wldev *dev);
void b43_nphy_radio_turn_on(struct b43_wldev *dev);
void b43_nphy_radio_turn_off(struct b43_wldev *dev);

void b43_nphy_selectchannel(struct b43_wldev *dev, u8 channel);
int b43_nphy_selectchannel(struct b43_wldev *dev, u8 channel);

void b43_nphy_xmitpower(struct b43_wldev *dev);
void b43_nphy_set_rxantenna(struct b43_wldev *dev, int antenna);
Expand Down
28 changes: 20 additions & 8 deletions drivers/net/wireless/b43/phy.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3883,7 +3883,8 @@ int b43_radio_selectchannel(struct b43_wldev *dev,
struct b43_phy *phy = &dev->phy;
u16 r8, tmp;
u16 freq;
u16 channelcookie;
u16 channelcookie, savedcookie;
int err = 0;

if (channel == 0xFF) {
switch (phy->type) {
Expand All @@ -3910,12 +3911,15 @@ int b43_radio_selectchannel(struct b43_wldev *dev,
if (0 /*FIXME on 5Ghz */)
channelcookie |= 0x100;
//FIXME set 40Mhz flag if required
savedcookie = b43_shm_read16(dev, B43_SHM_SHARED, B43_SHM_SH_CHAN);
b43_shm_write16(dev, B43_SHM_SHARED, B43_SHM_SH_CHAN, channelcookie);

switch (phy->type) {
case B43_PHYTYPE_A:
if (channel > 200)
return -EINVAL;
if (channel > 200) {
err = -EINVAL;
goto out;
}
freq = channel2freq_a(channel);

r8 = b43_radio_read16(dev, 0x0008);
Expand Down Expand Up @@ -3964,8 +3968,10 @@ int b43_radio_selectchannel(struct b43_wldev *dev,
b43_phy_xmitpower(dev); //FIXME correct?
break;
case B43_PHYTYPE_G:
if ((channel < 1) || (channel > 14))
return -EINVAL;
if ((channel < 1) || (channel > 14)) {
err = -EINVAL;
goto out;
}

if (synthetic_pu_workaround)
b43_synth_pu_workaround(dev, channel);
Expand All @@ -3990,7 +3996,9 @@ int b43_radio_selectchannel(struct b43_wldev *dev,
}
break;
case B43_PHYTYPE_N:
b43_nphy_selectchannel(dev, channel);
err = b43_nphy_selectchannel(dev, channel);
if (err)
goto out;
break;
default:
B43_WARN_ON(1);
Expand All @@ -3999,8 +4007,12 @@ int b43_radio_selectchannel(struct b43_wldev *dev,
phy->channel = channel;
/* Wait for the radio to tune to the channel and stabilize. */
msleep(8);

return 0;
out:
if (err) {
b43_shm_write16(dev, B43_SHM_SHARED,
B43_SHM_SH_CHAN, savedcookie);
}
return err;
}

void b43_radio_turn_on(struct b43_wldev *dev)
Expand Down
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