iwmc3200wifi: New initial LMAC calibration

The LMAC calibration API got broken mostly by having a configuration bitmap
being different than the result one.
This patch tries to address that issue by correctly running calibrations with
the newest firmwares, and keeping a backward compatibility fallback path for
older firmwares, where the configuration and result bitmaps were identical.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

4 files changed, 61 insertions, 18 deletions

diff --git a/drivers/net/wireless/iwmc3200wifi/fw.c b/drivers/net/wireless/iwmc3200wifi/fw.c
index 0f32cab9ced4..6b0bcad758ca 100644
--- a/drivers/net/wireless/iwmc3200wifi/fw.c
+++ b/drivers/net/wireless/iwmc3200wifi/fw.c
@@ -261,6 +261,33 @@ static int iwm_load_lmac(struct iwm_priv *iwm, const char *img_name)
                         cpu_to_le32(UMAC_RST_CTRL_FLG_LARC_CLK_EN), 0);
 }
 
+static int iwm_init_calib(struct iwm_priv *iwm, unsigned long cfg_bitmap,
+                          unsigned long expected_bitmap, u8 rx_iq_cmd)
+{
+        /* Read RX IQ calibration result from EEPROM */
+        if (test_bit(rx_iq_cmd, &cfg_bitmap)) {
+                iwm_store_rxiq_calib_result(iwm);
+                set_bit(PHY_CALIBRATE_RX_IQ_CMD, &iwm->calib_done_map);
+        }
+
+        iwm_send_prio_table(iwm);
+        iwm_send_init_calib_cfg(iwm, cfg_bitmap);
+
+        while (iwm->calib_done_map != expected_bitmap) {
+                if (iwm_notif_handle(iwm, CALIBRATION_RES_NOTIFICATION,
+                                     IWM_SRC_LMAC, WAIT_NOTIF_TIMEOUT)) {
+                        IWM_DBG_FW(iwm, DBG, "Initial calibration timeout\n");
+                        return -ETIMEDOUT;
+                }
+
+                IWM_DBG_FW(iwm, DBG, "Got calibration result. calib_done_map: "
+                           "0x%lx, expected calibrations: 0x%lx\n",
+                           iwm->calib_done_map, expected_bitmap);
+        }
+
+        return 0;
+}
+
 /*
  * We currently have to load 3 FWs:
  * 1) The UMAC (Upper MAC).
@@ -276,6 +303,7 @@ static int iwm_load_lmac(struct iwm_priv *iwm, const char *img_name)
 int iwm_load_fw(struct iwm_priv *iwm)
 {
         unsigned long init_calib_map, periodic_calib_map;
+        unsigned long expected_calib_map;
         int ret;
 
         /* We first start downloading the UMAC */
@@ -317,27 +345,21 @@ int iwm_load_fw(struct iwm_priv *iwm)
         }
 
         init_calib_map = iwm->conf.calib_map & IWM_CALIB_MAP_INIT_MSK;
+        expected_calib_map = iwm->conf.expected_calib_map &
+                IWM_CALIB_MAP_INIT_MSK;
         periodic_calib_map = IWM_CALIB_MAP_PER_LMAC(iwm->conf.calib_map);
 
-        /* Read RX IQ calibration result from EEPROM */
-        if (test_bit(PHY_CALIBRATE_RX_IQ_CMD, &init_calib_map)) {
-                iwm_store_rxiq_calib_result(iwm);
-                set_bit(PHY_CALIBRATE_RX_IQ_CMD, &iwm->calib_done_map);
-        }
-
-        iwm_send_prio_table(iwm);
-        iwm_send_init_calib_cfg(iwm, init_calib_map);
-
-        while (iwm->calib_done_map != init_calib_map) {
-                ret = iwm_notif_handle(iwm, CALIBRATION_RES_NOTIFICATION,
-                                       IWM_SRC_LMAC, WAIT_NOTIF_TIMEOUT);
-                if (ret) {
-                        IWM_ERR(iwm, "Wait for calibration result timeout\n");
+        ret = iwm_init_calib(iwm, init_calib_map, expected_calib_map,
+                             CALIB_CFG_RX_IQ_IDX);
+        if (ret < 0) {
+                /* Let's try the old way */
+                ret = iwm_init_calib(iwm, expected_calib_map,
+                                     expected_calib_map,
+                                     PHY_CALIBRATE_RX_IQ_CMD);
+                if (ret < 0) {
+                        IWM_ERR(iwm, "Calibration result timeout\n");
                         goto out;
                 }
-                IWM_DBG_FW(iwm, DBG, "Got calibration result. calib_done_map: "
-                           "0x%lx, requested calibrations: 0x%lx\n",
-                           iwm->calib_done_map, init_calib_map);
         }
 
         /* Handle LMAC CALIBRATION_COMPLETE notification */
diff --git a/drivers/net/wireless/iwmc3200wifi/iwm.h b/drivers/net/wireless/iwmc3200wifi/iwm.h
index da49df6f4020..74964ee93bb7 100644
--- a/drivers/net/wireless/iwmc3200wifi/iwm.h
+++ b/drivers/net/wireless/iwmc3200wifi/iwm.h
@@ -64,6 +64,7 @@
 struct iwm_conf {
         u32 sdio_ior_timeout;
         unsigned long calib_map;
+        unsigned long expected_calib_map;
         bool reset_on_fatal_err;
         bool auto_connect;
         bool wimax_not_present;
diff --git a/drivers/net/wireless/iwmc3200wifi/lmac.h b/drivers/net/wireless/iwmc3200wifi/lmac.h
index 19213e165f5f..6c1a14c4480f 100644
--- a/drivers/net/wireless/iwmc3200wifi/lmac.h
+++ b/drivers/net/wireless/iwmc3200wifi/lmac.h
@@ -396,9 +396,24 @@ enum {
         CALIBRATION_CMD_NUM,
 };
 
+enum {
+        CALIB_CFG_RX_BB_IDX       = 0,
+        CALIB_CFG_DC_IDX          = 1,
+        CALIB_CFG_LO_IDX          = 2,
+        CALIB_CFG_TX_IQ_IDX       = 3,
+        CALIB_CFG_RX_IQ_IDX       = 4,
+        CALIB_CFG_NOISE_IDX       = 5,
+        CALIB_CFG_CRYSTAL_IDX     = 6,
+        CALIB_CFG_TEMPERATURE_IDX = 7,
+        CALIB_CFG_PAPD_IDX        = 8,
+        CALIB_CFG_LAST_IDX        = CALIB_CFG_PAPD_IDX,
+        CALIB_CFG_MODULE_NUM,
+};
+
 #define IWM_CALIB_MAP_INIT_MSK          0xFFFF
 #define IWM_CALIB_MAP_PER_LMAC(m)       ((m & 0xFF0000) >> 16)
 #define IWM_CALIB_MAP_PER_UMAC(m)       ((m & 0xFF000000) >> 24)
+#define IWM_CALIB_OPCODE_TO_INDEX(op)   (op - PHY_CALIBRATE_OPCODES_NUM)
 
 struct iwm_lmac_calib_hdr {
         u8 opcode;
diff --git a/drivers/net/wireless/iwmc3200wifi/main.c b/drivers/net/wireless/iwmc3200wifi/main.c
index 6cf2f0c0911e..fc7fce44a9d7 100644
--- a/drivers/net/wireless/iwmc3200wifi/main.c
+++ b/drivers/net/wireless/iwmc3200wifi/main.c
@@ -53,7 +53,12 @@
 static struct iwm_conf def_iwm_conf = {
 
         .sdio_ior_timeout       = 5000,
-        .calib_map              = BIT(PHY_CALIBRATE_DC_CMD)     |
+        .calib_map              = BIT(CALIB_CFG_DC_IDX) |
+                                  BIT(CALIB_CFG_LO_IDX) |
+                                  BIT(CALIB_CFG_TX_IQ_IDX)      |
+                                  BIT(CALIB_CFG_RX_IQ_IDX)      |
+                                  BIT(SHILOH_PHY_CALIBRATE_BASE_BAND_CMD),
+        .expected_calib_map     = BIT(PHY_CALIBRATE_DC_CMD)     |
                                   BIT(PHY_CALIBRATE_LO_CMD)     |
                                   BIT(PHY_CALIBRATE_TX_IQ_CMD)  |
                                   BIT(PHY_CALIBRATE_RX_IQ_CMD)  |