wl12xx: Add support for block reading from a fixed register address

Add support for block reading (multiple bytes) from a fixed chipset
register address. This is required for the wl1271 TX data path.

Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/wl12xx/spi.c

@@ -301,7 +301,7 @@ void wl12xx_spi_read(struct wl12xx *wl, int addr, void *buf,
 }
 
 void wl12xx_spi_write(struct wl12xx *wl, int addr, void *buf,
-		      size_t len)
+		      size_t len, bool fixed)
 {
 	struct spi_transfer t[2];
 	struct spi_message m;
@@ -314,6 +314,9 @@ void wl12xx_spi_write(struct wl12xx *wl, int addr, void *buf,
 	*cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
 	*cmd |= addr & WSPI_CMD_BYTE_ADDR;
 
+	if (fixed)
+		*cmd |= WSPI_CMD_FIXED;
+
 	spi_message_init(&m);
 	memset(t, 0, sizeof(t));
 
@@ -348,7 +351,7 @@ void wl12xx_spi_mem_write(struct wl12xx *wl, int addr, void *buf,
 
 	physical = wl12xx_translate_mem_addr(wl, addr);
 
-	wl12xx_spi_write(wl, physical, buf, len);
+	wl12xx_spi_write(wl, physical, buf, len, false);
 }
 
 void wl12xx_spi_reg_read(struct wl12xx *wl, int addr, void *buf, size_t len,
@@ -361,13 +364,14 @@ void wl12xx_spi_reg_read(struct wl12xx *wl, int addr, void *buf, size_t len,
 	wl12xx_spi_read(wl, physical, buf, len, fixed);
 }
 
-void wl12xx_spi_reg_write(struct wl12xx *wl, int addr, void *buf, size_t len)
+void wl12xx_spi_reg_write(struct wl12xx *wl, int addr, void *buf, size_t len,
+			  bool fixed)
 {
 	int physical;
 
 	physical = wl12xx_translate_reg_addr(wl, addr);
 
-	wl12xx_spi_write(wl, physical, buf, len);
+	wl12xx_spi_write(wl, physical, buf, len, fixed);
 }
 
 u32 wl12xx_mem_read32(struct wl12xx *wl, int addr)

drivers/net/wireless/wl12xx/spi.h

@@ -71,7 +71,8 @@
 
 
 /* Raw target IO, address is not translated */
-void wl12xx_spi_write(struct wl12xx *wl, int addr, void *buf, size_t len);
+void wl12xx_spi_write(struct wl12xx *wl, int addr, void *buf,
+		      size_t len, bool fixed);
 void wl12xx_spi_read(struct wl12xx *wl, int addr, void *buf,
 		     size_t len, bool fixed);
 
@@ -84,7 +85,8 @@ void wl12xx_mem_write32(struct wl12xx *wl, int addr, u32 val);
 /* Registers IO */
 void wl12xx_spi_reg_read(struct wl12xx *wl, int addr, void *buf, size_t len,
 			 bool fixed);
-void wl12xx_spi_reg_write(struct wl12xx *wl, int addr, void *buf,size_t len);
+void wl12xx_spi_reg_write(struct wl12xx *wl, int addr, void *buf, size_t len,
+			  bool fixed);
 u32 wl12xx_reg_read32(struct wl12xx *wl, int addr);
 void wl12xx_reg_write32(struct wl12xx *wl, int addr, u32 val);
 
@@ -106,7 +108,8 @@ static inline u32 wl12xx_read32(struct wl12xx *wl, int addr)
 static inline void wl12xx_write32(struct wl12xx *wl, int addr, u32 val)
 {
 	wl->buffer_32 = val;
-	wl12xx_spi_write(wl, addr, &wl->buffer_32, sizeof(wl->buffer_32));
+	wl12xx_spi_write(wl, addr, &wl->buffer_32,
+			 sizeof(wl->buffer_32), false);
 }
 
 #endif /* __WL12XX_SPI_H__ */