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authorRafał Miłecki <zajec5@gmail.com>2010-01-15 14:48:21 +0100
committerJohn W. Linville <linville@tuxdriver.com>2010-01-15 17:05:36 -0500
commit90b9738d85395d46ffdc961e1a0c80a17e8f4d32 (patch)
treeb95c1028dad4aecae1266aa79e66b166b505751e
parentdfb4aa5dd0a9b61a6eaa64e9209b2f8839c0a256 (diff)
b43: N-PHY: RSSI calibration for rev < 3
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--drivers/net/wireless/b43/phy_n.c157
1 files changed, 155 insertions, 2 deletions
diff --git a/drivers/net/wireless/b43/phy_n.c b/drivers/net/wireless/b43/phy_n.c
index a0e84c428e7..126c0afa5da 100644
--- a/drivers/net/wireless/b43/phy_n.c
+++ b/drivers/net/wireless/b43/phy_n.c
@@ -685,7 +685,160 @@ static int b43_nphy_poll_rssi(struct b43_wldev *dev, u8 type, s32 *buf,
/* http://bcm-v4.sipsolutions.net/802.11/PHY/N/RSSICal */
static void b43_nphy_rev2_rssi_cal(struct b43_wldev *dev, u8 type)
{
- /* TODO */
+ int i, j;
+ u8 state[4];
+ u8 code, val;
+ u16 class, override;
+ u8 regs_save_radio[2];
+ u16 regs_save_phy[2];
+ s8 offset[4];
+
+ u16 clip_state[2];
+ u16 clip_off[2] = { 0xFFFF, 0xFFFF };
+ s32 results_min[4] = { };
+ u8 vcm_final[4] = { };
+ s32 results[4][4] = { };
+ s32 miniq[4][2] = { };
+
+ if (type == 2) {
+ code = 0;
+ val = 6;
+ } else if (type < 2) {
+ code = 25;
+ val = 4;
+ } else {
+ B43_WARN_ON(1);
+ return;
+ }
+
+ class = b43_nphy_classifier(dev, 0, 0);
+ b43_nphy_classifier(dev, 7, 4);
+ b43_nphy_read_clip_detection(dev, clip_state);
+ b43_nphy_write_clip_detection(dev, clip_off);
+
+ if (b43_current_band(dev->wl) == IEEE80211_BAND_5GHZ)
+ override = 0x140;
+ else
+ override = 0x110;
+
+ regs_save_phy[0] = b43_phy_read(dev, B43_NPHY_RFCTL_INTC1);
+ regs_save_radio[0] = b43_radio_read16(dev, B2055_C1_PD_RXTX);
+ b43_phy_write(dev, B43_NPHY_RFCTL_INTC1, override);
+ b43_radio_write16(dev, B2055_C1_PD_RXTX, val);
+
+ regs_save_phy[1] = b43_phy_read(dev, B43_NPHY_RFCTL_INTC2);
+ regs_save_radio[1] = b43_radio_read16(dev, B2055_C2_PD_RXTX);
+ b43_phy_write(dev, B43_NPHY_RFCTL_INTC2, override);
+ b43_radio_write16(dev, B2055_C2_PD_RXTX, val);
+
+ state[0] = b43_radio_read16(dev, B2055_C1_PD_RSSIMISC) & 0x07;
+ state[1] = b43_radio_read16(dev, B2055_C2_PD_RSSIMISC) & 0x07;
+ b43_radio_mask(dev, B2055_C1_PD_RSSIMISC, 0xF8);
+ b43_radio_mask(dev, B2055_C2_PD_RSSIMISC, 0xF8);
+ state[2] = b43_radio_read16(dev, B2055_C1_SP_RSSI) & 0x07;
+ state[3] = b43_radio_read16(dev, B2055_C2_SP_RSSI) & 0x07;
+
+ b43_nphy_rssi_select(dev, 5, type);
+ b43_nphy_scale_offset_rssi(dev, 0, 0, 5, 0, type);
+ b43_nphy_scale_offset_rssi(dev, 0, 0, 5, 1, type);
+
+ for (i = 0; i < 4; i++) {
+ u8 tmp[4];
+ for (j = 0; j < 4; j++)
+ tmp[j] = i;
+ if (type != 1)
+ b43_nphy_set_rssi_2055_vcm(dev, type, tmp);
+ b43_nphy_poll_rssi(dev, type, results[i], 8);
+ if (type < 2)
+ for (j = 0; j < 2; j++)
+ miniq[i][j] = min(results[i][2 * j],
+ results[i][2 * j + 1]);
+ }
+
+ for (i = 0; i < 4; i++) {
+ s32 mind = 40;
+ u8 minvcm = 0;
+ s32 minpoll = 249;
+ s32 curr;
+ for (j = 0; j < 4; j++) {
+ if (type == 2)
+ curr = abs(results[j][i]);
+ else
+ curr = abs(miniq[j][i / 2] - code * 8);
+
+ if (curr < mind) {
+ mind = curr;
+ minvcm = j;
+ }
+
+ if (results[j][i] < minpoll)
+ minpoll = results[j][i];
+ }
+ results_min[i] = minpoll;
+ vcm_final[i] = minvcm;
+ }
+
+ if (type != 1)
+ b43_nphy_set_rssi_2055_vcm(dev, type, vcm_final);
+
+ for (i = 0; i < 4; i++) {
+ offset[i] = (code * 8) - results[vcm_final[i]][i];
+
+ if (offset[i] < 0)
+ offset[i] = -((abs(offset[i]) + 4) / 8);
+ else
+ offset[i] = (offset[i] + 4) / 8;
+
+ if (results_min[i] == 248)
+ offset[i] = code - 32;
+
+ if (i % 2 == 0)
+ b43_nphy_scale_offset_rssi(dev, 0, offset[i], 1, 0,
+ type);
+ else
+ b43_nphy_scale_offset_rssi(dev, 0, offset[i], 2, 1,
+ type);
+ }
+
+ b43_radio_maskset(dev, B2055_C1_PD_RSSIMISC, 0xF8, state[0]);
+ b43_radio_maskset(dev, B2055_C1_PD_RSSIMISC, 0xF8, state[1]);
+
+ switch (state[2]) {
+ case 1:
+ b43_nphy_rssi_select(dev, 1, 2);
+ break;
+ case 4:
+ b43_nphy_rssi_select(dev, 1, 0);
+ break;
+ case 2:
+ b43_nphy_rssi_select(dev, 1, 1);
+ break;
+ default:
+ b43_nphy_rssi_select(dev, 1, 1);
+ break;
+ }
+
+ switch (state[3]) {
+ case 1:
+ b43_nphy_rssi_select(dev, 2, 2);
+ break;
+ case 4:
+ b43_nphy_rssi_select(dev, 2, 0);
+ break;
+ default:
+ b43_nphy_rssi_select(dev, 2, 1);
+ break;
+ }
+
+ b43_nphy_rssi_select(dev, 0, type);
+
+ b43_phy_write(dev, B43_NPHY_RFCTL_INTC1, regs_save_phy[0]);
+ b43_radio_write16(dev, B2055_C1_PD_RXTX, regs_save_radio[0]);
+ b43_phy_write(dev, B43_NPHY_RFCTL_INTC2, regs_save_phy[1]);
+ b43_radio_write16(dev, B2055_C2_PD_RXTX, regs_save_radio[1]);
+
+ b43_nphy_classifier(dev, 7, class);
+ b43_nphy_write_clip_detection(dev, clip_state);
}
/* http://bcm-v4.sipsolutions.net/802.11/PHY/N/RSSICalRev3 */
@@ -867,7 +1020,7 @@ int b43_phy_initn(struct b43_wldev *dev)
if (nphy->antsel_type == 2)
;/*TODO NPHY Superswitch Init with argument 1*/
if (nphy->perical != 2) {
- /* b43_nphy_rssi_cal(dev); */
+ b43_nphy_rssi_cal(dev);
if (phy->rev >= 3) {
nphy->cal_orig_pwr_idx[0] =
nphy->txpwrindex[0].index_internal;