[arm/tegra/ventana] provide wifi power/carddetect abstraction

When user switches on wifi, wifi driver need to poweron wifi card and
ask sdhci stack to enumerate the card. Sdhci stack does not provide any
interface to do so. BCM4329 depend on platform to provide wifi
poweron/reset/carddetect abstraction functions

bug 724105

Change-Id: Ib82ac12cd0a3c33c8406434e64872c4cda3c2cc7
Reviewed-on: http://git-master/r/9883
Reviewed-by: Rakesh Kumar <krakesh@nvidia.com>
Tested-by: Rakesh Kumar <krakesh@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>

1 files changed, 110 insertions, 1 deletions

diff --git a/arch/arm/mach-tegra/board-ventana-sdhci.c b/arch/arm/mach-tegra/board-ventana-sdhci.c
index 13ab48b1c7a1..7dc76f6111cc 100644
--- a/arch/arm/mach-tegra/board-ventana-sdhci.c
+++ b/arch/arm/mach-tegra/board-ventana-sdhci.c
@@ -16,8 +16,12 @@
 
 #include <linux/resource.h>
 #include <linux/platform_device.h>
+#include <linux/wlan_plat.h>
 #include <linux/delay.h>
 #include <linux/gpio.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/mmc/host.h>
 
 #include <asm/mach-types.h>
 #include <mach/irqs.h>
@@ -27,6 +31,32 @@
 #include "gpio-names.h"
 #include "board.h"
 
+#define VENTANA_WLAN_PWR	TEGRA_GPIO_PK5
+#define VENTANA_WLAN_RST	TEGRA_GPIO_PK6
+
+static void (*wifi_status_cb)(int card_present, void *dev_id);
+static void *wifi_status_cb_devid;
+static int ventana_wifi_status_register(void (*callback)(int , void *), void *);
+static struct clk *wifi_32k_clk;
+
+static int ventana_wifi_reset(int on);
+static int ventana_wifi_power(int on);
+static int ventana_wifi_set_carddetect(int val);
+
+static struct wifi_platform_data ventana_wifi_control = {
+	.set_power      = ventana_wifi_power,
+	.set_reset      = ventana_wifi_reset,
+	.set_carddetect = ventana_wifi_set_carddetect,
+};
+
+static struct platform_device ventana_wifi_device = {
+	.name           = "bcm4329_wlan",
+	.id             = 1,
+	.dev            = {
+		.platform_data = &ventana_wifi_control,
+	},
+};
+
 static struct resource sdhci_resource0[] = {
 	[0] = {
 		.start  = INT_SDMMC1,
@@ -66,9 +96,23 @@ static struct resource sdhci_resource3[] = {
 	},
 };
 
+
 static struct tegra_sdhci_platform_data tegra_sdhci_platform_data0 = {
 	.clk_id = NULL,
-	.force_hs = 1,
+	.force_hs = 0,
+	.register_status_notify	= ventana_wifi_status_register,
+	.cccr   = {
+		.sdio_vsn       = 2,
+		.multi_block    = 1,
+		.low_speed      = 0,
+		.wide_bus       = 0,
+		.high_power     = 1,
+		.high_speed     = 1,
+	},
+	.cis  = {
+		.vendor         = 0x02d0,
+		.device         = 0x4329,
+	},
 	.cd_gpio = -1,
 	.wp_gpio = -1,
 	.power_gpio = -1,
@@ -120,6 +164,70 @@ static struct platform_device tegra_sdhci_device3 = {
 	},
 };
 
+static int ventana_wifi_status_register(
+		void (*callback)(int card_present, void *dev_id),
+		void *dev_id)
+{
+	if (wifi_status_cb)
+		return -EAGAIN;
+	wifi_status_cb = callback;
+	wifi_status_cb_devid = dev_id;
+	return 0;
+}
+
+static int ventana_wifi_set_carddetect(int val)
+{
+	pr_debug("%s: %d\n", __func__, val);
+	if (wifi_status_cb)
+		wifi_status_cb(val, wifi_status_cb_devid);
+	else
+		pr_warning("%s: Nobody to notify\n", __func__);
+	return 0;
+}
+
+static int ventana_wifi_power(int on)
+{
+	pr_debug("%s: %d\n", __func__, on);
+
+	gpio_set_value(VENTANA_WLAN_PWR, on);
+	mdelay(100);
+	gpio_set_value(VENTANA_WLAN_RST, on);
+	mdelay(200);
+
+	if (on)
+		clk_enable(wifi_32k_clk);
+	else
+		clk_disable(wifi_32k_clk);
+
+	return 0;
+}
+
+static int ventana_wifi_reset(int on)
+{
+	pr_debug("%s: do nothing\n", __func__);
+	return 0;
+}
+
+static int __init ventana_wifi_init(void)
+{
+	wifi_32k_clk = clk_get_sys(NULL, "blink");
+	if (IS_ERR(wifi_32k_clk)) {
+		pr_err("%s: unable to get blink clock\n", __func__);
+		return PTR_ERR(wifi_32k_clk);
+	}
+
+	gpio_request(VENTANA_WLAN_PWR, "wlan_power");
+	gpio_request(VENTANA_WLAN_RST, "wlan_rst");
+
+	tegra_gpio_enable(VENTANA_WLAN_PWR);
+	tegra_gpio_enable(VENTANA_WLAN_RST);
+
+	gpio_direction_output(VENTANA_WLAN_PWR, 0);
+	gpio_direction_output(VENTANA_WLAN_RST, 0);
+
+	platform_device_register(&ventana_wifi_device);
+	return 0;
+}
 int __init ventana_sdhci_init(void)
 {
 	gpio_request(tegra_sdhci_platform_data2.power_gpio, "sdhci2_power");
@@ -140,5 +248,6 @@ int __init ventana_sdhci_init(void)
 	platform_device_register(&tegra_sdhci_device2);
 	platform_device_register(&tegra_sdhci_device0);
 
+	ventana_wifi_init();
 	return 0;
 }