From: Avinash Patil <patila@marvell.com>
Date: Fri, 4 Jan 2013 05:21:29 +0000 (-0800)
Subject: mwifiex: add init_fw_port handler for PCIe interface
X-Git-Tag: accepted/tizen/common/20141203.182822~2855^2~242^2^2~50
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c6d1d87a10d1e5317701676c39bbec20e4651b91;p=platform%2Fkernel%2Flinux-arm64.git

mwifiex: add init_fw_port handler for PCIe interface

This patch adds support for init_fw_port handler for PCIe
interface, which resets RXBD read pointer for PCIe.
This fixes issue where RX doesn't work until some TX from
driver happens.

Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/mwifiex/init.c b/drivers/net/wireless/mwifiex/init.c
index 39f03ce..e00b806 100644
--- a/drivers/net/wireless/mwifiex/init.c
+++ b/drivers/net/wireless/mwifiex/init.c
@@ -591,6 +591,12 @@ int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 				return -1;
 		}
 	}
+
+	if (adapter->if_ops.init_fw_port) {
+		if (adapter->if_ops.init_fw_port(adapter))
+			return -1;
+	}
+
 	for (i = 0; i < adapter->priv_num; i++) {
 		if (adapter->priv[i]) {
 			ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta);
diff --git a/drivers/net/wireless/mwifiex/main.h b/drivers/net/wireless/mwifiex/main.h
index d717c98..ef02a5b 100644
--- a/drivers/net/wireless/mwifiex/main.h
+++ b/drivers/net/wireless/mwifiex/main.h
@@ -599,6 +599,7 @@ struct mwifiex_if_ops {
 	int (*cmdrsp_complete) (struct mwifiex_adapter *, struct sk_buff *);
 	int (*event_complete) (struct mwifiex_adapter *, struct sk_buff *);
 	int (*data_complete) (struct mwifiex_adapter *, struct sk_buff *);
+	int (*init_fw_port) (struct mwifiex_adapter *);
 	int (*dnld_fw) (struct mwifiex_adapter *, struct mwifiex_fw_image *);
 	void (*card_reset) (struct mwifiex_adapter *);
 };
diff --git a/drivers/net/wireless/mwifiex/pcie.c b/drivers/net/wireless/mwifiex/pcie.c
index e4c2cfd..191c682 100644
--- a/drivers/net/wireless/mwifiex/pcie.c
+++ b/drivers/net/wireless/mwifiex/pcie.c
@@ -966,8 +966,23 @@ mwifiex_pcie_send_boot_cmd(struct mwifiex_adapter *adapter, struct sk_buff *skb)
 	return 0;
 }
 
-/*
- * This function downloads commands to the device
+/* This function init rx port in firmware which in turn enables to receive data
+ * from device before transmitting any packet.
+ */
+static int mwifiex_pcie_init_fw_port(struct mwifiex_adapter *adapter)
+{
+	struct pcie_service_card *card = adapter->card;
+
+	/* Write the RX ring read pointer in to REG_RXBD_RDPTR */
+	if (mwifiex_write_reg(adapter, REG_RXBD_RDPTR, card->rxbd_rdptr | 0)) {
+		dev_err(adapter->dev,
+			"RECV DATA: failed to write REG_RXBD_RDPTR\n");
+		return -1;
+	}
+	return 0;
+}
+
+/* This function downloads commands to the device
  */
 static int
 mwifiex_pcie_send_cmd(struct mwifiex_adapter *adapter, struct sk_buff *skb)
@@ -1899,6 +1914,7 @@ static struct mwifiex_if_ops pcie_ops = {
 	.event_complete =		mwifiex_pcie_event_complete,
 	.update_mp_end_port =		NULL,
 	.cleanup_mpa_buf =		NULL,
+	.init_fw_port =			mwifiex_pcie_init_fw_port,
 };
 
 /*