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authorBing Zhao <bzhao@marvell.com>2014-03-29 01:54:39 +0400
committerMarcel Holtmann <marcel@holtmann.org>2014-03-29 06:37:06 +0400
commit0d3674084c89130bcaf15b1a69881b31f198ee72 (patch)
treeea7e78cb189e6df4d2ea6279a18a860f3976ae95 /drivers/bluetooth/btmrvl_main.c
parent3d5a76f08bbac55305da87f4c810279189f64297 (diff)
downloadlinux-0d3674084c89130bcaf15b1a69881b31f198ee72.tar.xz
Bluetooth: btmrvl: implement read-to-clear for SD8897 interrupts
For SD8897, CMD52 write_to_clear may have missing interrupts under certain corner case condition. Use CMD53 read-to-clear to fix the problem. Signed-off-by: Bing Zhao <bzhao@marvell.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth/btmrvl_main.c')
-rw-r--r--drivers/bluetooth/btmrvl_main.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/bluetooth/btmrvl_main.c b/drivers/bluetooth/btmrvl_main.c
index 2c4997ce2484..5c0b9444b5e1 100644
--- a/drivers/bluetooth/btmrvl_main.c
+++ b/drivers/bluetooth/btmrvl_main.c
@@ -24,6 +24,7 @@
#include <net/bluetooth/hci_core.h>
#include "btmrvl_drv.h"
+#include "btmrvl_sdio.h"
#define VERSION "1.0"
@@ -337,10 +338,25 @@ static int btmrvl_tx_pkt(struct btmrvl_private *priv, struct sk_buff *skb)
static void btmrvl_init_adapter(struct btmrvl_private *priv)
{
+ int buf_size;
+
skb_queue_head_init(&priv->adapter->tx_queue);
priv->adapter->ps_state = PS_AWAKE;
+ buf_size = ALIGN_SZ(SDIO_BLOCK_SIZE, BTSDIO_DMA_ALIGN);
+ priv->adapter->hw_regs_buf = kzalloc(buf_size, GFP_KERNEL);
+ if (!priv->adapter->hw_regs_buf) {
+ priv->adapter->hw_regs = NULL;
+ BT_ERR("Unable to allocate buffer for hw_regs.");
+ } else {
+ priv->adapter->hw_regs =
+ (u8 *)ALIGN_ADDR(priv->adapter->hw_regs_buf,
+ BTSDIO_DMA_ALIGN);
+ BT_DBG("hw_regs_buf=%p hw_regs=%p",
+ priv->adapter->hw_regs_buf, priv->adapter->hw_regs);
+ }
+
init_waitqueue_head(&priv->adapter->cmd_wait_q);
}
@@ -348,6 +364,7 @@ static void btmrvl_free_adapter(struct btmrvl_private *priv)
{
skb_queue_purge(&priv->adapter->tx_queue);
+ kfree(priv->adapter->hw_regs_buf);
kfree(priv->adapter);
priv->adapter = NULL;