wlcore/wl18xx: export conf struct in a debugfs file

Add conf file header structure, magic and version values and export
the entire conf struct in debugfs.

Signed-off-by: Luciano Coelho <coelho@ti.com>

3 files changed, 72 insertions, 0 deletions

diff --git a/drivers/net/wireless/ti/wl18xx/conf.h b/drivers/net/wireless/ti/wl18xx/conf.h
index b75a6d359712..130546aa970d 100644
--- a/drivers/net/wireless/ti/wl18xx/conf.h
+++ b/drivers/net/wireless/ti/wl18xx/conf.h
@@ -22,6 +22,12 @@
 #ifndef __WL18XX_CONF_H__
 #define __WL18XX_CONF_H__
 
+#define WL18XX_CONF_MAGIC       0x10e100ca
+#define WL18XX_CONF_VERSION     (WLCORE_CONF_VERSION | 0x0001)
+#define WL18XX_CONF_MASK        0x0000ffff
+#define WL18XX_CONF_SIZE        (WLCORE_CONF_SIZE + \
+                                 sizeof(struct wl18xx_priv_conf))
+
 struct wl18xx_conf_phy {
         u8 phy_standalone;
         u8 rdl;
diff --git a/drivers/net/wireless/ti/wl18xx/debugfs.c b/drivers/net/wireless/ti/wl18xx/debugfs.c
index 468651c2f54c..96b149662906 100644
--- a/drivers/net/wireless/ti/wl18xx/debugfs.c
+++ b/drivers/net/wireless/ti/wl18xx/debugfs.c
@@ -158,6 +158,48 @@ WL18XX_DEBUGFS_FWSTATS_FILE(mem, tx_free_mem_blks, "%u");
 WL18XX_DEBUGFS_FWSTATS_FILE(mem, fwlog_free_mem_blks, "%u");
 WL18XX_DEBUGFS_FWSTATS_FILE(mem, fw_gen_free_mem_blks, "%u");
 
+static ssize_t conf_read(struct file *file, char __user *user_buf,
+                         size_t count, loff_t *ppos)
+{
+        struct wl1271 *wl = file->private_data;
+        struct wl18xx_priv *priv = wl->priv;
+        struct wlcore_conf_header header;
+        char *buf, *pos;
+        size_t len;
+        int ret;
+
+        len = WL18XX_CONF_SIZE;
+        buf = kmalloc(len, GFP_KERNEL);
+        if (!buf)
+                return -ENOMEM;
+
+        header.magic    = cpu_to_le32(WL18XX_CONF_MAGIC);
+        header.version  = cpu_to_le32(WL18XX_CONF_VERSION);
+        header.checksum = 0;
+
+        mutex_lock(&wl->mutex);
+
+        pos = buf;
+        memcpy(pos, &header, sizeof(header));
+        pos += sizeof(header);
+        memcpy(pos, &wl->conf, sizeof(wl->conf));
+        pos += sizeof(wl->conf);
+        memcpy(pos, &priv->conf, sizeof(priv->conf));
+
+        mutex_unlock(&wl->mutex);
+
+        ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
+
+        kfree(buf);
+        return ret;
+}
+
+static const struct file_operations conf_ops = {
+        .read = conf_read,
+        .open = simple_open,
+        .llseek = default_llseek,
+};
+
 static ssize_t clear_fw_stats_write(struct file *file,
                               const char __user *user_buf,
                               size_t count, loff_t *ppos)
@@ -327,6 +369,8 @@ int wl18xx_debugfs_add_files(struct wl1271 *wl,
         DEBUGFS_FWSTATS_ADD(mem, fwlog_free_mem_blks);
         DEBUGFS_FWSTATS_ADD(mem, fw_gen_free_mem_blks);
 
+        DEBUGFS_ADD(conf, moddir);
+
         return 0;
 
 err:
diff --git a/drivers/net/wireless/ti/wlcore/conf.h b/drivers/net/wireless/ti/wlcore/conf.h
index 27d919fa997f..03c635872335 100644
--- a/drivers/net/wireless/ti/wlcore/conf.h
+++ b/drivers/net/wireless/ti/wlcore/conf.h
@@ -1271,6 +1271,22 @@ struct conf_hangover_settings {
         u8 window_size;
 } __packed;
 
+/*
+ * The conf version consists of 4 bytes.  The two MSB are the wlcore
+ * version, the two LSB are the lower driver's private conf
+ * version.
+ */
+#define WLCORE_CONF_VERSION     (0x0001 << 16)
+#define WLCORE_CONF_MASK        0xffff0000
+#define WLCORE_CONF_SIZE        (sizeof(struct wlcore_conf_header) +    \
+                                 sizeof(struct wlcore_conf))
+
+struct wlcore_conf_header {
+        __le32 magic;
+        __le32 version;
+        __le32 checksum;
+} __packed;
+
 struct wlcore_conf {
         struct conf_sg_settings sg;
         struct conf_rx_settings rx;
@@ -1290,4 +1306,10 @@ struct wlcore_conf {
         struct conf_hangover_settings hangover;
 } __packed;
 
+struct wlcore_conf_file {
+        struct wlcore_conf_header header;
+        struct wlcore_conf core;
+        u8 priv[0];
+} __packed;
+
 #endif