wl12xx: export driver state to debugfs

By reading the "driver_state" debugfs value we get all the important
state information from the wl12xx driver. This helps testing and
debugging, particularly in situations where the driver seems "stuck".
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

drivers/net/wireless/wl12xx/debugfs.c

@@ -310,6 +310,92 @@ static const struct file_operations start_recovery_ops = {
 	.llseek = default_llseek,
 };
 
+static ssize_t driver_state_read(struct file *file, char __user *user_buf,
+				 size_t count, loff_t *ppos)
+{
+	struct wl1271 *wl = file->private_data;
+	int res = 0;
+	char buf[1024];
+
+	mutex_lock(&wl->mutex);
+
+#define DRIVER_STATE_PRINT(x, fmt)   \
+	(res += scnprintf(buf + res, sizeof(buf) - res,\
+			  #x " = " fmt "\n", wl->x))
+
+#define DRIVER_STATE_PRINT_LONG(x) DRIVER_STATE_PRINT(x, "%ld")
+#define DRIVER_STATE_PRINT_INT(x)  DRIVER_STATE_PRINT(x, "%d")
+#define DRIVER_STATE_PRINT_STR(x)  DRIVER_STATE_PRINT(x, "%s")
+#define DRIVER_STATE_PRINT_LHEX(x) DRIVER_STATE_PRINT(x, "0x%lx")
+#define DRIVER_STATE_PRINT_HEX(x)  DRIVER_STATE_PRINT(x, "0x%x")
+
+	DRIVER_STATE_PRINT_INT(tx_blocks_available);
+	DRIVER_STATE_PRINT_INT(tx_allocated_blocks);
+	DRIVER_STATE_PRINT_INT(tx_frames_cnt);
+	DRIVER_STATE_PRINT_LHEX(tx_frames_map[0]);
+	DRIVER_STATE_PRINT_INT(tx_queue_count);
+	DRIVER_STATE_PRINT_INT(tx_packets_count);
+	DRIVER_STATE_PRINT_INT(tx_results_count);
+	DRIVER_STATE_PRINT_LHEX(flags);
+	DRIVER_STATE_PRINT_INT(tx_blocks_freed[0]);
+	DRIVER_STATE_PRINT_INT(tx_blocks_freed[1]);
+	DRIVER_STATE_PRINT_INT(tx_blocks_freed[2]);
+	DRIVER_STATE_PRINT_INT(tx_blocks_freed[3]);
+	DRIVER_STATE_PRINT_INT(tx_security_last_seq);
+	DRIVER_STATE_PRINT_INT(rx_counter);
+	DRIVER_STATE_PRINT_INT(session_counter);
+	DRIVER_STATE_PRINT_INT(state);
+	DRIVER_STATE_PRINT_INT(bss_type);
+	DRIVER_STATE_PRINT_INT(channel);
+	DRIVER_STATE_PRINT_HEX(rate_set);
+	DRIVER_STATE_PRINT_HEX(basic_rate_set);
+	DRIVER_STATE_PRINT_HEX(basic_rate);
+	DRIVER_STATE_PRINT_INT(band);
+	DRIVER_STATE_PRINT_INT(beacon_int);
+	DRIVER_STATE_PRINT_INT(psm_entry_retry);
+	DRIVER_STATE_PRINT_INT(ps_poll_failures);
+	DRIVER_STATE_PRINT_HEX(filters);
+	DRIVER_STATE_PRINT_HEX(rx_config);
+	DRIVER_STATE_PRINT_HEX(rx_filter);
+	DRIVER_STATE_PRINT_INT(power_level);
+	DRIVER_STATE_PRINT_INT(rssi_thold);
+	DRIVER_STATE_PRINT_INT(last_rssi_event);
+	DRIVER_STATE_PRINT_INT(sg_enabled);
+	DRIVER_STATE_PRINT_INT(enable_11a);
+	DRIVER_STATE_PRINT_INT(noise);
+	DRIVER_STATE_PRINT_LHEX(ap_hlid_map[0]);
+	DRIVER_STATE_PRINT_INT(last_tx_hlid);
+	DRIVER_STATE_PRINT_INT(ba_support);
+	DRIVER_STATE_PRINT_HEX(ba_rx_bitmap);
+	DRIVER_STATE_PRINT_HEX(ap_fw_ps_map);
+	DRIVER_STATE_PRINT_LHEX(ap_ps_map);
+	DRIVER_STATE_PRINT_HEX(quirks);
+	DRIVER_STATE_PRINT_HEX(irq);
+	DRIVER_STATE_PRINT_HEX(ref_clock);
+	DRIVER_STATE_PRINT_HEX(tcxo_clock);
+	DRIVER_STATE_PRINT_HEX(hw_pg_ver);
+	DRIVER_STATE_PRINT_HEX(platform_quirks);
+	DRIVER_STATE_PRINT_HEX(chip.id);
+	DRIVER_STATE_PRINT_STR(chip.fw_ver_str);
+
+#undef DRIVER_STATE_PRINT_INT
+#undef DRIVER_STATE_PRINT_LONG
+#undef DRIVER_STATE_PRINT_HEX
+#undef DRIVER_STATE_PRINT_LHEX
+#undef DRIVER_STATE_PRINT_STR
+#undef DRIVER_STATE_PRINT
+
+	mutex_unlock(&wl->mutex);
+
+	return simple_read_from_buffer(user_buf, count, ppos, buf, res);
+}
+
+static const struct file_operations driver_state_ops = {
+	.read = driver_state_read,
+	.open = wl1271_open_file_generic,
+	.llseek = default_llseek,
+};
+
 static ssize_t dtim_interval_read(struct file *file, char __user *user_buf,
 				  size_t count, loff_t *ppos)
 {
@@ -549,6 +635,7 @@ static int wl1271_debugfs_add_files(struct wl1271 *wl,
 
 	DEBUGFS_ADD(gpio_power, rootdir);
 	DEBUGFS_ADD(start_recovery, rootdir);
+	DEBUGFS_ADD(driver_state, rootdir);
 	DEBUGFS_ADD(dtim_interval, rootdir);
 	DEBUGFS_ADD(beacon_interval, rootdir);