mwl8k: Adding support to access BBP registers

Adding AP firmware command to access BBP
regs. This will be used for retrieving
different counters CCA/RX needed for ACS

Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com>
Signed-off-by: Nishant Sarmukadam <nishants@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/drivers/net/wireless/mwl8k.c b/drivers/net/wireless/mwl8k.c
index 4987c3f942ce..6c002f3d91cd 100644
--- a/drivers/net/wireless/mwl8k.c
+++ b/drivers/net/wireless/mwl8k.c
@@ -396,6 +396,7 @@ static const struct ieee80211_rate mwl8k_rates_50[] = {
 #define MWL8K_CMD_SET_HW_SPEC           0x0004
 #define MWL8K_CMD_MAC_MULTICAST_ADR     0x0010
 #define MWL8K_CMD_GET_STAT              0x0014
+#define MWL8K_CMD_BBP_REG_ACCESS        0x001a
 #define MWL8K_CMD_RADIO_CONTROL         0x001c
 #define MWL8K_CMD_RF_TX_POWER           0x001e
 #define MWL8K_CMD_TX_POWER              0x001f
@@ -2987,6 +2988,47 @@ static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
 }
 
 /*
+ * CMD_BBP_REG_ACCESS.
+ */
+struct mwl8k_cmd_bbp_reg_access {
+        struct mwl8k_cmd_pkt header;
+        __le16 action;
+        __le16 offset;
+        u8 value;
+        u8 rsrv[3];
+} __packed;
+
+static int
+mwl8k_cmd_bbp_reg_access(struct ieee80211_hw *hw,
+                         u16 action,
+                         u16 offset,
+                         u8 *value)
+{
+        struct mwl8k_cmd_bbp_reg_access *cmd;
+        int rc;
+
+        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+        if (cmd == NULL)
+                return -ENOMEM;
+
+        cmd->header.code = cpu_to_le16(MWL8K_CMD_BBP_REG_ACCESS);
+        cmd->header.length = cpu_to_le16(sizeof(*cmd));
+        cmd->action = cpu_to_le16(action);
+        cmd->offset = cpu_to_le16(offset);
+
+        rc = mwl8k_post_cmd(hw, &cmd->header);
+
+        if (!rc)
+                *value = cmd->value;
+        else
+                *value = 0;
+
+        kfree(cmd);
+
+        return rc;
+}
+
+/*
  * CMD_SET_POST_SCAN.
  */
 struct mwl8k_cmd_set_post_scan {