wl1251: add NVS in EEPROM support

wl1251 supports also that NVS is stored in a separate EEPROM, add support
for that.

kvalo: use platform data instead Kconfig and use kernel style

Signed-off-by: David-John Willis <John.Willis@Distant-earth.com>
Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

5 files changed, 23 insertions, 7 deletions

diff --git a/drivers/net/wireless/wl12xx/wl1251.h b/drivers/net/wireless/wl12xx/wl1251.h
index a839466664f..054533f7a12 100644
--- a/drivers/net/wireless/wl12xx/wl1251.h
+++ b/drivers/net/wireless/wl12xx/wl1251.h
@@ -269,6 +269,7 @@ struct wl1251 {
 
         void (*set_power)(bool enable);
         int irq;
+        bool use_eeprom;
 
         enum wl1251_state state;
         struct mutex mutex;
diff --git a/drivers/net/wireless/wl12xx/wl1251_boot.c b/drivers/net/wireless/wl12xx/wl1251_boot.c
index 5094f24ad03..2e733e7bdfd 100644
--- a/drivers/net/wireless/wl12xx/wl1251_boot.c
+++ b/drivers/net/wireless/wl12xx/wl1251_boot.c
@@ -494,13 +494,19 @@ int wl1251_boot(struct wl1251 *wl)
                 goto out;
 
         /* 2. start processing NVS file */
-        ret = wl1251_boot_upload_nvs(wl);
-        if (ret < 0)
-                goto out;
-
-        /* write firmware's last address (ie. it's length) to
-         * ACX_EEPROMLESS_IND_REG */
-        wl1251_reg_write32(wl, ACX_EEPROMLESS_IND_REG, wl->fw_len);
+        if (wl->use_eeprom) {
+                wl1251_reg_write32(wl, ACX_REG_EE_START, START_EEPROM_MGR);
+                msleep(4000);
+                wl1251_reg_write32(wl, ACX_EEPROMLESS_IND_REG, USE_EEPROM);
+        } else {
+                ret = wl1251_boot_upload_nvs(wl);
+                if (ret < 0)
+                        goto out;
+
+                /* write firmware's last address (ie. it's length) to
+                 * ACX_EEPROMLESS_IND_REG */
+                wl1251_reg_write32(wl, ACX_EEPROMLESS_IND_REG, wl->fw_len);
+        }
 
         /* 6. read the EEPROM parameters */
         tmp = wl1251_reg_read32(wl, SCR_PAD2);
diff --git a/drivers/net/wireless/wl12xx/wl1251_reg.h b/drivers/net/wireless/wl12xx/wl1251_reg.h
index 06e1bd94a73..0ca3b432605 100644
--- a/drivers/net/wireless/wl12xx/wl1251_reg.h
+++ b/drivers/net/wireless/wl12xx/wl1251_reg.h
@@ -370,6 +370,7 @@ enum wl12xx_acx_int_reg {
  EEPROM location specified in the EE_ADDR register.
  The Wlan hardware hardware clears this bit automatically.
 *===============================================*/
+#define EE_CTL                              (REGISTERS_BASE + 0x2000)
 #define ACX_EE_CTL_REG                      EE_CTL
 #define EE_WRITE                            0x00000001ul
 #define EE_READ                             0x00000002ul
@@ -380,6 +381,7 @@ enum wl12xx_acx_int_reg {
   This register specifies the address
   within the EEPROM from/to which to read/write data.
   ===============================================*/
+#define EE_ADDR                             (REGISTERS_BASE + 0x2008)
 #define ACX_EE_ADDR_REG                     EE_ADDR
 
 /*===============================================
@@ -389,8 +391,12 @@ enum wl12xx_acx_int_reg {
   data from the EEPROM or the write data
   to be written to the EEPROM.
   ===============================================*/
+#define EE_DATA                             (REGISTERS_BASE + 0x2004)
 #define ACX_EE_DATA_REG                     EE_DATA
 
+#define EEPROM_ACCESS_TO                    10000   /* timeout counter */
+#define START_EEPROM_MGR                    0x00000001
+
 /*===============================================
   EEPROM Base Address  - 32bit RW
   ------------------------------------------
diff --git a/drivers/net/wireless/wl12xx/wl1251_spi.c b/drivers/net/wireless/wl12xx/wl1251_spi.c
index 2cf8a2169d4..9cc8c323830 100644
--- a/drivers/net/wireless/wl12xx/wl1251_spi.c
+++ b/drivers/net/wireless/wl12xx/wl1251_spi.c
@@ -270,6 +270,8 @@ static int __devinit wl1251_spi_probe(struct spi_device *spi)
                 return -ENODEV;
         }
 
+        wl->use_eeprom = pdata->use_eeprom;
+
         ret = request_irq(wl->irq, wl1251_irq, 0, DRIVER_NAME, wl);
         if (ret < 0) {
                 wl1251_error("request_irq() failed: %d", ret);
diff --git a/include/linux/spi/wl12xx.h b/include/linux/spi/wl12xx.h
index 11430cab2aa..aed64ed3dc8 100644
--- a/include/linux/spi/wl12xx.h
+++ b/include/linux/spi/wl12xx.h
@@ -26,6 +26,7 @@
 
 struct wl12xx_platform_data {
         void (*set_power)(bool enable);
+        bool use_eeprom;
 };
 
 #endif