wl1271: fix endianess issues

We were not handling endianess correctly.  The wl1271 chip runs on
little-endian values.  This patch makes sure that all the communication with
the wl1271 firmware is done in little-endian by using cpu_to_le* and
le*_to_cpu where appropriate.

Also, all the struct definitions for data exchanged with the firmware has
been changed to use __le16/32 types instead of u16/32.

This fixes a few sparse warnings, such as these:

drivers/net/wireless/wl12xx/wl1271_cmd.c:554:42: warning: incorrect type in assignment (different base types)
drivers/net/wireless/wl12xx/wl1271_cmd.c:555:42: warning: incorrect type in assignment (different base types)
drivers/net/wireless/wl12xx/wl1271_cmd.c:577:58: warning: incorrect type in assignment (different base types)
drivers/net/wireless/wl12xx/wl1271_cmd.c:579:58: warning: incorrect type in assignment (different base types)
drivers/net/wireless/wl12xx/wl1271_cmd.c:676:18: warning: incorrect type in assignment (different base types)
drivers/net/wireless/wl12xx/wl1271_cmd.c:787:22: warning: incorrect type in assignment (different base types)
drivers/net/wireless/wl12xx/wl1271_cmd.c:789:21: warning: incorrect type in assignment (different base types)
drivers/net/wireless/wl12xx/wl1271_tx.c:98:47: warning: incorrect type in argument 1 (different base types)
drivers/net/wireless/wl12xx/wl1271_acx.c:932:32: warning: incorrect type in assignment (different base types)
drivers/net/wireless/wl12xx/wl1271_boot.c:191:32: warning: incorrect type in argument 1 (different base types)
drivers/net/wireless/wl12xx/wl1271_boot.c:197:38: warning: incorrect type in argument 1 (different base types)
drivers/net/wireless/wl12xx/wl1271_boot.c:199:37: warning: incorrect type in argument 1 (different base types)
drivers/net/wireless/wl12xx/wl1271_init.c:255:40: warning: incorrect type in assignment (different base types)
drivers/net/wireless/wl12xx/wl1271_init.c:275:53: warning: incorrect type in assignment (different base types)

Reported-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Reviewed-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 13 insertions, 9 deletions

diff --git a/drivers/net/wireless/wl12xx/wl1271_tx.c b/drivers/net/wireless/wl12xx/wl1271_tx.c
index 4560458a6d6..00af065c77c 100644
--- a/drivers/net/wireless/wl12xx/wl1271_tx.c
+++ b/drivers/net/wireless/wl12xx/wl1271_tx.c
@@ -88,6 +88,7 @@ static int wl1271_tx_fill_hdr(struct wl1271 *wl, struct sk_buff *skb,
 {
 	struct wl1271_tx_hw_descr *desc;
 	int pad;
+	u16 tx_attr;
 
 	desc = (struct wl1271_tx_hw_descr *) skb->data;
 
@@ -95,16 +96,17 @@ static int wl1271_tx_fill_hdr(struct wl1271 *wl, struct sk_buff *skb,
 	if (extra) {
 		void *framestart = skb->data + sizeof(*desc);
 		u16 fc = *(u16 *)(framestart + extra);
-		int hdrlen = ieee80211_hdrlen(fc);
+		int hdrlen = ieee80211_hdrlen(cpu_to_le16(fc));
 		memmove(framestart, framestart + extra, hdrlen);
 	}
 
 	/* configure packet life time */
-	desc->start_time = jiffies_to_usecs(jiffies) - wl->time_offset;
-	desc->life_time = TX_HW_MGMT_PKT_LIFETIME_TU;
+	desc->start_time = cpu_to_le32(jiffies_to_usecs(jiffies) -
+				       wl->time_offset);
+	desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU);
 
 	/* configure the tx attributes */
-	desc->tx_attr = wl->session_counter << TX_HW_ATTR_OFST_SESSION_COUNTER;
+	tx_attr = wl->session_counter << TX_HW_ATTR_OFST_SESSION_COUNTER;
 	/* FIXME: do we know the packet priority? can we identify mgmt
 	   packets, and use max prio for them at least? */
 	desc->tid = 0;
@@ -113,11 +115,13 @@ static int wl1271_tx_fill_hdr(struct wl1271 *wl, struct sk_buff *skb,
 
 	/* align the length (and store in terms of words) */
 	pad = WL1271_TX_ALIGN(skb->len);
-	desc->length = pad >> 2;
+	desc->length = cpu_to_le16(pad >> 2);
 
 	/* calculate number of padding bytes */
 	pad = pad - skb->len;
-	desc->tx_attr |= pad << TX_HW_ATTR_OFST_LAST_WORD_PAD;
+	tx_attr |= pad << TX_HW_ATTR_OFST_LAST_WORD_PAD;
+
+	desc->tx_attr = cpu_to_le16(tx_attr);
 
 	wl1271_debug(DEBUG_TX, "tx_fill_hdr: pad: %d", pad);
 	return 0;
@@ -331,7 +335,7 @@ void wl1271_tx_complete(struct wl1271 *wl, u32 count)
 	wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count);
 
 	/* read the tx results from the chipset */
-	wl1271_spi_read(wl, memmap->tx_result,
+	wl1271_spi_read(wl, le32_to_cpu(memmap->tx_result),
 			wl->tx_res_if, sizeof(*wl->tx_res_if), false);
 
 	/* verify that the result buffer is not getting overrun */
@@ -353,10 +357,10 @@ void wl1271_tx_complete(struct wl1271 *wl, u32 count)
 	}
 
 	/* write host counter to chipset (to ack) */
-	wl1271_spi_write32(wl, memmap->tx_result +
+	wl1271_spi_write32(wl, le32_to_cpu(memmap->tx_result) +
 			   offsetof(struct wl1271_tx_hw_res_if,
 				    tx_result_host_counter),
-			   wl->tx_res_if->tx_result_fw_counter);
+			   le32_to_cpu(wl->tx_res_if->tx_result_fw_counter));
 }
 
 /* caller must hold wl->mutex */