wlcore: add module parameter to dump SDIO reads and writes

In some cases we may want to dump all the SDIO data in order to get
detailed information for debugging the communication with the
firmware.

Add printks to dump the data and a module parameter to enable/disable
it.

Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>

diff --git a/drivers/net/wireless/ti/wlcore/sdio.c b/drivers/net/wireless/ti/wlcore/sdio.c
index 1082e394e8f711f668e173ad98694402c6d88947..c67ec482e4451f4d6355388dd3e133e1f80aaca4 100644 (file)
--- a/drivers/net/wireless/ti/wlcore/sdio.c
+++ b/drivers/net/wireless/ti/wlcore/sdio.c
@@ -33,6 +33,7 @@
 #include <linux/gpio.h>
 #include <linux/wl12xx.h>
 #include <linux/pm_runtime.h>
+#include <linux/printk.h>
 
 #include "wlcore.h"
 #include "wl12xx_80211.h"
@@ -46,6 +47,8 @@
 #define SDIO_DEVICE_ID_TI_WL1271       0x4076
 #endif
 
+static bool dump = false;
+
 struct wl12xx_sdio_glue {
        struct device *dev;
        struct platform_device *core;
@@ -77,6 +80,13 @@ static void wl12xx_sdio_raw_read(struct device *child, int addr, void *buf,
 
        sdio_claim_host(func);
 
+       if (unlikely(dump)) {
+               printk(KERN_DEBUG "wlcore_sdio: READ from 0x%04x\n", addr);
+               print_hex_dump(KERN_DEBUG, "wlcore_sdio: READ ",
+                               DUMP_PREFIX_OFFSET, 16, 1,
+                               buf, len, false);
+       }
+
        if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) {
                ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
                dev_dbg(child->parent, "sdio read 52 addr 0x%x, byte 0x%02x\n",
@@ -106,6 +116,13 @@ static void wl12xx_sdio_raw_write(struct device *child, int addr, void *buf,
 
        sdio_claim_host(func);
 
+       if (unlikely(dump)) {
+               printk(KERN_DEBUG "wlcore_sdio: WRITE to 0x%04x\n", addr);
+               print_hex_dump(KERN_DEBUG, "wlcore_sdio: WRITE ",
+                               DUMP_PREFIX_OFFSET, 16, 1,
+                               buf, len, false);
+       }
+
        if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) {
                sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
                dev_dbg(child->parent, "sdio write 52 addr 0x%x, byte 0x%02x\n",
@@ -380,6 +397,9 @@ static void __exit wl1271_exit(void)
 module_init(wl1271_init);
 module_exit(wl1271_exit);
 
+module_param(dump, bool, S_IRUSR | S_IWUSR);
+MODULE_PARM_DESC(dump, "Enable sdio read/write dumps.");
+
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");