From 8832b23b20e3d60a5ce93b0c35e529e2df286811 Mon Sep 17 00:00:00 2001
From: Pavan Kumar <pavan@codeaurora.org>
Date: Mon, 5 Mar 2012 19:32:29 +0530
Subject: [PATCH] WLAN: WCN1314: Add API to enable/disable interrupts from
 chip.

Add an API to enable/disable interrupts from the chip.
This API uses func0 SDIO_CCCR_IENx register to enable/disable
interrupts from the chip.

Change-Id: I2da8d569511aeff0409744a90e7daf4704fff91d
Signed-off-by: Pavan kumar <pavan@codeaurora.org>
---
 drivers/net/wireless/libra/libra_sdioif.c | 33 +++++++++++++++++++++++
 include/linux/libra_sdioif.h              |  1 +
 2 files changed, 34 insertions(+)

diff --git a/drivers/net/wireless/libra/libra_sdioif.c b/drivers/net/wireless/libra/libra_sdioif.c
index 3955642de81..3421f8444d7 100644
--- a/drivers/net/wireless/libra/libra_sdioif.c
+++ b/drivers/net/wireless/libra/libra_sdioif.c
@@ -29,6 +29,37 @@ static unsigned short  libra_sdio_card_id;
 static suspend_handler_t *libra_suspend_hldr;
 static resume_handler_t *libra_resume_hldr;
 
+int libra_enable_sdio_irq_in_chip(struct sdio_func *func, u8 enable)
+{
+	unsigned char reg = 0;
+	int err = 0;
+
+	sdio_claim_host(func);
+
+	/* Read the value into reg */
+	libra_sdiocmd52(func, SDIO_CCCR_IENx, &reg, 0, &err);
+	if (err)
+		printk(KERN_ERR "%s: Could not read  SDIO_CCCR_IENx register "
+				"err=%d\n", __func__, err);
+
+	if (libra_mmc_host) {
+		if (enable) {
+			reg |= 1 << func->num;
+			reg |= 1;
+		} else {
+			reg &= ~(1 << func->num);
+		}
+		libra_sdiocmd52(func, SDIO_CCCR_IENx, &reg, 1, &err);
+		if (err)
+			printk(KERN_ERR "%s: Could not enable/disable irq "
+					 "err=%d\n", __func__, err);
+	 }
+	sdio_release_host(func);
+
+	return err;
+}
+EXPORT_SYMBOL(libra_enable_sdio_irq_in_chip);
+
 /**
  * libra_sdio_configure() - Function to configure the SDIO device param
  * @libra_sdio_rxhandler    Rx handler
@@ -89,6 +120,8 @@ int libra_sdio_configure(sdio_irq_handler_t libra_sdio_rxhandler,
 		goto cfg_error;
 	}
 
+	libra_enable_sdio_irq_in_chip(func, 0);
+
 	sdio_release_host(func);
 
 	return 0;
diff --git a/include/linux/libra_sdioif.h b/include/linux/libra_sdioif.h
index 965e2b511c5..08be83a8c23 100644
--- a/include/linux/libra_sdioif.h
+++ b/include/linux/libra_sdioif.h
@@ -35,6 +35,7 @@
 typedef int (suspend_handler_t)(struct sdio_func *);
 typedef void (resume_handler_t)(struct sdio_func *);
 
+int libra_enable_sdio_irq_in_chip(struct sdio_func *func, u8 enable);
 int    libra_sdio_configure(sdio_irq_handler_t libra_sdio_rxhandler,
 		void (*func_drv_fn)(int *status),
 		u32 funcdrv_timeout, u32 blksize);