ath5k: Update gain_F calibration code and add documentation
* Update and cleanup rf gain optimization code
* Add comments and refferences to docs and use sane function names
* Use only step index on ath5k_gain, no need to have a pointer to
the current step since we can determine te step from it's index,
this also allows us to put all other structs on rfgain.h and cleanup
ath5k.h a little
* No need for ah_rfgain variable, we use ah_gain.g_state for everything
* Tested on RF2112B chip but gain_F calibration is not yet done
(we will finish this on the next patch where we'll rewrite rf-buffer
handling)
* Use initial rf gain settings for 2316 and 2317 SoCs introduced on a previous patch
It seems big but it's mostly cleanup, very few functional changes have been made on phy.c
Signed-off-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath5k/rfgain.h b/drivers/net/wireless/ath5k/rfgain.h
index 6dd2ea1..1354d8c 100644
--- a/drivers/net/wireless/ath5k/rfgain.h
+++ b/drivers/net/wireless/ath5k/rfgain.h
@@ -441,12 +441,38 @@
{ AR5K_RF_GAIN(63), { 0x00000000, 0x000000f9 } },
};
+#define AR5K_GAIN_CRN_FIX_BITS_5111 4
+#define AR5K_GAIN_CRN_FIX_BITS_5112 7
+#define AR5K_GAIN_CRN_MAX_FIX_BITS AR5K_GAIN_CRN_FIX_BITS_5112
+#define AR5K_GAIN_DYN_ADJUST_HI_MARGIN 15
+#define AR5K_GAIN_DYN_ADJUST_LO_MARGIN 20
+#define AR5K_GAIN_CCK_PROBE_CORR 5
+#define AR5K_GAIN_CCK_OFDM_GAIN_DELTA 15
+#define AR5K_GAIN_STEP_COUNT 10
+
+/* Check if our current measurement is inside our
+ * current variable attenuation window */
+#define AR5K_GAIN_CHECK_ADJUST(_g) \
+ ((_g)->g_current <= (_g)->g_low || (_g)->g_current >= (_g)->g_high)
+
+struct ath5k_gain_opt_step {
+ s8 gos_param[AR5K_GAIN_CRN_MAX_FIX_BITS];
+ s8 gos_gain;
+};
+
struct ath5k_gain_opt {
- u32 go_default;
- u32 go_steps_count;
+ u8 go_default;
+ u8 go_steps_count;
const struct ath5k_gain_opt_step go_step[AR5K_GAIN_STEP_COUNT];
};
+/*
+ * Parameters on gos_param:
+ * 1) Tx clip PHY register
+ * 2) PWD 90 RF register
+ * 3) PWD 84 RF register
+ * 4) RFGainSel RF register
+ */
static const struct ath5k_gain_opt rfgain_opt_5111 = {
4,
9,
@@ -463,6 +489,16 @@
}
};
+/*
+ * Parameters on gos_param:
+ * 1) Mixgain ovr RF register
+ * 2) PWD 138 RF register
+ * 3) PWD 137 RF register
+ * 4) PWD 136 RF register
+ * 5) PWD 132 RF register
+ * 6) PWD 131 RF register
+ * 7) PWD 130 RF register
+ */
static const struct ath5k_gain_opt rfgain_opt_5112 = {
1,
8,