b43: N-PHY: implement overriding RF control

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 137 insertions, 3 deletions

diff --git a/drivers/net/wireless/b43/phy_n.c b/drivers/net/wireless/b43/phy_n.c
index 2cdf32e5fd9b..d3c9783b76ba 100644
--- a/drivers/net/wireless/b43/phy_n.c
+++ b/drivers/net/wireless/b43/phy_n.c
@@ -912,6 +912,82 @@ ok:
         b43_phy_write(dev, B43_NPHY_RFSEQMODE, seq_mode);
 }
 
+/* http://bcm-v4.sipsolutions.net/802.11/PHY/N/RFCtrlOverride */
+static void b43_nphy_rf_control_override(struct b43_wldev *dev, u16 field,
+                                                u16 value, u8 core, bool off)
+{
+        int i;
+        u8 index = fls(field);
+        u8 addr, en_addr, val_addr;
+        /* we expect only one bit set */
+        B43_WARN_ON(field & (~(1 << index)));
+
+        if (dev->phy.rev >= 3) {
+                const struct nphy_rf_control_override_rev3 *rf_ctrl;
+                for (i = 0; i < 2; i++) {
+                        if (index == 0 || index == 16) {
+                                b43err(dev->wl,
+                                        "Unsupported RF Ctrl Override call\n");
+                                return;
+                        }
+
+                        rf_ctrl = &tbl_rf_control_override_rev3[index - 1];
+                        en_addr = B43_PHY_N((i == 0) ?
+                                rf_ctrl->en_addr0 : rf_ctrl->en_addr1);
+                        val_addr = B43_PHY_N((i == 0) ?
+                                rf_ctrl->val_addr0 : rf_ctrl->val_addr1);
+
+                        if (off) {
+                                b43_phy_mask(dev, en_addr, ~(field));
+                                b43_phy_mask(dev, val_addr,
+                                                ~(rf_ctrl->val_mask));
+                        } else {
+                                if (core == 0 || ((1 << core) & i) != 0) {
+                                        b43_phy_set(dev, en_addr, field);
+                                        b43_phy_maskset(dev, val_addr,
+                                                ~(rf_ctrl->val_mask),
+                                                (value << rf_ctrl->val_shift));
+                                }
+                        }
+                }
+        } else {
+                const struct nphy_rf_control_override_rev2 *rf_ctrl;
+                if (off) {
+                        b43_phy_mask(dev, B43_NPHY_RFCTL_OVER, ~(field));
+                        value = 0;
+                } else {
+                        b43_phy_set(dev, B43_NPHY_RFCTL_OVER, field);
+                }
+
+                for (i = 0; i < 2; i++) {
+                        if (index <= 1 || index == 16) {
+                                b43err(dev->wl,
+                                        "Unsupported RF Ctrl Override call\n");
+                                return;
+                        }
+
+                        if (index == 2 || index == 10 ||
+                            (index >= 13 && index <= 15)) {
+                                core = 1;
+                        }
+
+                        rf_ctrl = &tbl_rf_control_override_rev2[index - 2];
+                        addr = B43_PHY_N((i == 0) ?
+                                rf_ctrl->addr0 : rf_ctrl->addr1);
+
+                        if ((core & (1 << i)) != 0)
+                                b43_phy_maskset(dev, addr, ~(rf_ctrl->bmask),
+                                                (value << rf_ctrl->shift));
+
+                        b43_phy_set(dev, B43_NPHY_RFCTL_OVER, 0x1);
+                        b43_phy_set(dev, B43_NPHY_RFCTL_CMD,
+                                        B43_NPHY_RFCTL_CMD_START);
+                        udelay(1);
+                        b43_phy_mask(dev, B43_NPHY_RFCTL_OVER, 0xFFFE);
+                }
+        }
+}
+
 static void b43_nphy_bphy_init(struct b43_wldev *dev)
 {
         unsigned int i;
@@ -2075,8 +2151,8 @@ static int b43_nphy_rev2_cal_rx_iq(struct b43_wldev *dev,
 
                         tmp[0] = ((cur_hpf2 << 8) | (cur_hpf1 << 4) |
                                         (cur_lna << 2));
-                        /* TODO:Call N PHY RF Ctrl Override with 0x400, tmp[0],
-                                3, 0 as arguments */
+                        b43_nphy_rf_control_override(dev, 0x400, tmp[0], 3,
+                                                                        false);
                         b43_nphy_force_rf_sequence(dev, B43_RFSEQ_RESET2RX);
                         b43_nphy_stop_playback(dev);
 
@@ -2124,7 +2200,7 @@ static int b43_nphy_rev2_cal_rx_iq(struct b43_wldev *dev,
                         break;
         }
 
-        /* TODO: Call N PHY RF Ctrl Override with 0x400, 0, 3, 1 as arguments*/
+        b43_nphy_rf_control_override(dev, 0x400, 0, 3, true);
         b43_nphy_force_rf_sequence(dev, B43_RFSEQ_RESET2RX);
         b43_ntab_write_bulk(dev, B43_NTAB16(7, 0x110), 2, gain_save);
 
diff --git a/drivers/net/wireless/b43/tables_nphy.c b/drivers/net/wireless/b43/tables_nphy.c
index b8c9fc619ab1..dd9687d611d7 100644
--- a/drivers/net/wireless/b43/tables_nphy.c
+++ b/drivers/net/wireless/b43/tables_nphy.c
@@ -2883,6 +2883,43 @@ const u16 tbl_tx_iqlo_cal_cmds_fullcal_nphyrev3[] = {
         0x9084, 0x9267, 0x9056, 0x9234
 };
 
+/* addr0,  addr1,  bmask,  shift */
+const struct nphy_rf_control_override_rev2 tbl_rf_control_override_rev2[] = {
+        { 0x78, 0x78, 0x0038,  3 }, /* for field == 0x0002 (fls == 2) */
+        { 0x7A, 0x7D, 0x0001,  0 }, /* for field == 0x0004 (fls == 3) */
+        { 0x7A, 0x7D, 0x0002,  1 }, /* for field == 0x0008 (fls == 4) */
+        { 0x7A, 0x7D, 0x0004,  2 }, /* for field == 0x0010 (fls == 5) */
+        { 0x7A, 0x7D, 0x0030,  4 }, /* for field == 0x0020 (fls == 6) */
+        { 0x7A, 0x7D, 0x00C0,  6 }, /* for field == 0x0040 (fls == 7) */
+        { 0x7A, 0x7D, 0x0100,  8 }, /* for field == 0x0080 (fls == 8) */
+        { 0x7A, 0x7D, 0x0200,  9 }, /* for field == 0x0100 (fls == 9) */
+        { 0x78, 0x78, 0x0004,  2 }, /* for field == 0x0200 (fls == 10) */
+        { 0x7B, 0x7E, 0x01FF,  0 }, /* for field == 0x0400 (fls == 11) */
+        { 0x7C, 0x7F, 0x01FF,  0 }, /* for field == 0x0800 (fls == 12) */
+        { 0x78, 0x78, 0x0100,  8 }, /* for field == 0x1000 (fls == 13) */
+        { 0x78, 0x78, 0x0200,  9 }, /* for field == 0x2000 (fls == 14) */
+        { 0x78, 0x78, 0xF000, 12 }  /* for field == 0x4000 (fls == 15) */
+};
+
+/* val_mask, val_shift, en_addr0, val_addr0, en_addr1, val_addr1 */
+const struct nphy_rf_control_override_rev3 tbl_rf_control_override_rev3[] = {
+        { 0x8000, 15, 0xE5, 0xF9, 0xE6, 0xFB }, /* field == 0x0001 (fls 1) */
+        { 0x0001,  0, 0xE7, 0x7A, 0xEC, 0x7D }, /* field == 0x0002 (fls 2) */
+        { 0x0002,  1, 0xE7, 0x7A, 0xEC, 0x7D }, /* field == 0x0004 (fls 3) */
+        { 0x0004,  2, 0xE7, 0x7A, 0xEC, 0x7D }, /* field == 0x0008 (fls 4) */
+        { 0x0016,  4, 0xE7, 0x7A, 0xEC, 0x7D }, /* field == 0x0010 (fls 5) */
+        { 0x0020,  5, 0xE7, 0x7A, 0xEC, 0x7D }, /* field == 0x0020 (fls 6) */
+        { 0x0040,  6, 0xE7, 0x7A, 0xEC, 0x7D }, /* field == 0x0040 (fls 7) */
+        { 0x0080,  6, 0xE7, 0x7A, 0xEC, 0x7D }, /* field == 0x0080 (fls 8) */
+        { 0x0100,  7, 0xE7, 0x7A, 0xEC, 0x7D }, /* field == 0x0100 (fls 9) */
+        { 0x0007,  0, 0xE7, 0xF8, 0xEC, 0xFA }, /* field == 0x0200 (fls 10) */
+        { 0x0070,  4, 0xE7, 0xF8, 0xEC, 0xFA }, /* field == 0x0400 (fls 11) */
+        { 0xE000, 13, 0xE7, 0x7A, 0xEC, 0x7D }, /* field == 0x0800 (fls 12) */
+        { 0xFFFF,  0, 0xE7, 0x7B, 0xEC, 0x7E }, /* field == 0x1000 (fls 13) */
+        { 0xFFFF,  0, 0xE7, 0x7C, 0xEC, 0x7F }, /* field == 0x2000 (fls 14) */
+        { 0x00C0,  6, 0xE7, 0xF9, 0xEC, 0xFB }  /* field == 0x4000 (fls 15) */
+};
+
 static inline void assert_ntab_array_sizes(void)
 {
 #undef check
diff --git a/drivers/net/wireless/b43/tables_nphy.h b/drivers/net/wireless/b43/tables_nphy.h
index 6bbef894010c..5d38172a152d 100644
--- a/drivers/net/wireless/b43/tables_nphy.h
+++ b/drivers/net/wireless/b43/tables_nphy.h
@@ -51,6 +51,22 @@ struct nphy_txiqcal_ladder {
         u8 g_env;
 };
 
+struct nphy_rf_control_override_rev2 {
+        u8 addr0;
+        u8 addr1;
+        u16 bmask;
+        u8 shift;
+};
+
+struct nphy_rf_control_override_rev3 {
+        u16 val_mask;
+        u8 val_shift;
+        u8 en_addr0;
+        u8 val_addr0;
+        u8 en_addr1;
+        u8 val_addr1;
+};
+
 /* Upload the default register value table.
  * If "ghz5" is true, we upload the 5Ghz table. Otherwise the 2.4Ghz
  * table is uploaded. If "ignore_uploadflag" is true, we upload any value
@@ -178,4 +194,9 @@ extern const u16 tbl_tx_iqlo_cal_cmds_recal[];
 extern const u16 tbl_tx_iqlo_cal_cmds_fullcal[];
 extern const u16 tbl_tx_iqlo_cal_cmds_fullcal_nphyrev3[];
 
+extern const struct nphy_rf_control_override_rev2
+        tbl_rf_control_override_rev2[];
+extern const struct nphy_rf_control_override_rev3
+        tbl_rf_control_override_rev3[];
+
 #endif /* B43_TABLES_NPHY_H_ */