ath10k: sdio get target info

Special BMI get target info function for SDIO.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath10k/bmi.c b/drivers/net/wireless/ath/ath10k/bmi.c
index abeee20..2d3a2f3 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/bmi.c
+++ b/drivers/net/wireless/ath/ath10k/bmi.c
@@ -97,6 +97,77 @@ int ath10k_bmi_get_target_info(struct ath10k *ar,
        return 0;
 }
 
+#define TARGET_VERSION_SENTINAL 0xffffffffu
+
+int ath10k_bmi_get_target_info_sdio(struct ath10k *ar,
+                                   struct bmi_target_info *target_info)
+{
+       struct bmi_cmd cmd;
+       union bmi_resp resp;
+       u32 cmdlen = sizeof(cmd.id) + sizeof(cmd.get_target_info);
+       u32 resplen, ver_len;
+       __le32 tmp;
+       int ret;
+
+       ath10k_dbg(ar, ATH10K_DBG_BMI, "bmi get target info SDIO\n");
+
+       if (ar->bmi.done_sent) {
+               ath10k_warn(ar, "BMI Get Target Info Command disallowed\n");
+               return -EBUSY;
+       }
+
+       cmd.id = __cpu_to_le32(BMI_GET_TARGET_INFO);
+
+       /* Step 1: Read 4 bytes of the target info and check if it is
+        * the special sentinal version word or the first word in the
+        * version response.
+        */
+       resplen = sizeof(u32);
+       ret = ath10k_hif_exchange_bmi_msg(ar, &cmd, cmdlen, &tmp, &resplen);
+       if (ret) {
+               ath10k_warn(ar, "unable to read from device\n");
+               return ret;
+       }
+
+       /* Some SDIO boards have a special sentinal byte before the real
+        * version response.
+        */
+       if (__le32_to_cpu(tmp) == TARGET_VERSION_SENTINAL) {
+               /* Step 1b: Read the version length */
+               resplen = sizeof(u32);
+               ret = ath10k_hif_exchange_bmi_msg(ar, NULL, 0, &tmp,
+                                                 &resplen);
+               if (ret) {
+                       ath10k_warn(ar, "unable to read from device\n");
+                       return ret;
+               }
+       }
+
+       ver_len = __le32_to_cpu(tmp);
+
+       /* Step 2: Check the target info length */
+       if (ver_len != sizeof(resp.get_target_info)) {
+               ath10k_warn(ar, "Unexpected target info len: %u. Expected: %zu\n",
+                           ver_len, sizeof(resp.get_target_info));
+               return -EINVAL;
+       }
+
+       /* Step 3: Read the rest of the version response */
+       resplen = sizeof(resp.get_target_info) - sizeof(u32);
+       ret = ath10k_hif_exchange_bmi_msg(ar, NULL, 0,
+                                         &resp.get_target_info.version,
+                                         &resplen);
+       if (ret) {
+               ath10k_warn(ar, "unable to read from device\n");
+               return ret;
+       }
+
+       target_info->version = __le32_to_cpu(resp.get_target_info.version);
+       target_info->type    = __le32_to_cpu(resp.get_target_info.type);
+
+       return 0;
+}
+
 int ath10k_bmi_read_memory(struct ath10k *ar,
                           u32 address, void *buffer, u32 length)
 {

diff --git a/drivers/net/wireless/ath/ath10k/bmi.h b/drivers/net/wireless/ath/ath10k/bmi.h
index cc45b63..0342073 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/bmi.h
+++ b/drivers/net/wireless/ath/ath10k/bmi.h
@@ -198,6 +198,8 @@ void ath10k_bmi_start(struct ath10k *ar);
 int ath10k_bmi_done(struct ath10k *ar);
 int ath10k_bmi_get_target_info(struct ath10k *ar,
                               struct bmi_target_info *target_info);
+int ath10k_bmi_get_target_info_sdio(struct ath10k *ar,
+                                   struct bmi_target_info *target_info);
 int ath10k_bmi_read_memory(struct ath10k *ar, u32 address,
                           void *buffer, u32 length);
 int ath10k_bmi_write_memory(struct ath10k *ar, u32 address,

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 4857fbc..84487b1 100644 (file)
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -2218,7 +2218,10 @@ static int ath10k_core_probe_fw(struct ath10k *ar)
        }
 
        memset(&target_info, 0, sizeof(target_info));
-       ret = ath10k_bmi_get_target_info(ar, &target_info);
+       if (ar->hif.bus == ATH10K_BUS_SDIO)
+               ret = ath10k_bmi_get_target_info_sdio(ar, &target_info);
+       else
+               ret = ath10k_bmi_get_target_info(ar, &target_info);
        if (ret) {
                ath10k_err(ar, "could not get target info (%d)\n", ret);
                goto err_power_down;