[arm/tegra] Support for Wake-On-Wireless Event.

Support for device wakeup on receiving SDIO
interrupt in LP1/LP0 for incoming wifi pakcket.

Bug: 730157

Change-Id: Ia2e9bf2af215f33d6d6d8d78ba0cdf2d71011917
Reviewed-on: http://git-master/r/9813
Reviewed-by: Rahul Bansal <rbansal@nvidia.com>
Tested-by: Rahul Bansal <rbansal@nvidia.com>
Reviewed-by: Rakesh Kumar <krakesh@nvidia.com>
Tested-by: Rakesh Kumar <krakesh@nvidia.com>
Reviewed-by: Udaykumar Rameshchan Raval <uraval@nvidia.com>
Reviewed-by: Pavan Kunapuli <pkunapuli@nvidia.com>
Reviewed-by: Yu-Huan Hsu <yhsu@nvidia.com>
Reviewed-by: Varun Colbert <vcolbert@nvidia.com>
Tested-by: Varun Colbert <vcolbert@nvidia.com>

5 files changed, 24 insertions, 25 deletions

diff --git a/arch/arm/mach-tegra/board-nvodm.c b/arch/arm/mach-tegra/board-nvodm.c
index 39229f28ec7d..d362bb538c6a 100755
--- a/arch/arm/mach-tegra/board-nvodm.c
+++ b/arch/arm/mach-tegra/board-nvodm.c
@@ -1543,14 +1543,14 @@ static void __init tegra_setup_suspend(void)
 		gpio_to_irq(TEGRA_GPIO_PU5), gpio_to_irq(TEGRA_GPIO_PU6),
 		gpio_to_irq(TEGRA_GPIO_PC7), gpio_to_irq(TEGRA_GPIO_PS2),
 		gpio_to_irq(TEGRA_GPIO_PAA1), gpio_to_irq(TEGRA_GPIO_PW3),
-		gpio_to_irq(TEGRA_GPIO_PW2), gpio_to_irq(TEGRA_GPIO_PY6),
+		/* FIXME: USB/SDMMC wake pad interrupt mapping may be wrong */
+		gpio_to_irq(TEGRA_GPIO_PW2), INT_SDMMC1,
 		gpio_to_irq(TEGRA_GPIO_PV6), gpio_to_irq(TEGRA_GPIO_PJ7),
 		INT_RTC, INT_KBC, INT_EXTERNAL_PMU,
-		/* FIXME: USB wake pad interrupt mapping may be wrong */
 		INT_USB, INT_USB3, INT_USB, INT_USB3,
 		gpio_to_irq(TEGRA_GPIO_PI5), gpio_to_irq(TEGRA_GPIO_PV2),
 		gpio_to_irq(TEGRA_GPIO_PS4), gpio_to_irq(TEGRA_GPIO_PS5),
-		gpio_to_irq(TEGRA_GPIO_PS0), gpio_to_irq(TEGRA_GPIO_PQ6),
+		INT_SDMMC2, gpio_to_irq(TEGRA_GPIO_PQ6),
 		gpio_to_irq(TEGRA_GPIO_PQ7), gpio_to_irq(TEGRA_GPIO_PN2),
 	};
 #endif
diff --git a/arch/arm/mach-tegra/odm_kit/query/harmony/nvodm_query.c b/arch/arm/mach-tegra/odm_kit/query/harmony/nvodm_query.c
index 60a6d9db0faf..67d32cc71c37 100644..100755
--- a/arch/arm/mach-tegra/odm_kit/query/harmony/nvodm_query.c
+++ b/arch/arm/mach-tegra/odm_kit/query/harmony/nvodm_query.c
@@ -311,7 +311,7 @@ static NvOdmWakeupPadInfo s_NvOdmWakeupPadInfo[] =
     {NV_FALSE, 10, NvOdmWakeupPadPolarity_High},    // Wake Event 10 - gmi_ad21 (Accelerometer_TH/TAP)
     {NV_TRUE,  11, NvOdmWakeupPadPolarity_Low},     // Wake Event 11 - spi2_cs2 (PEN_INT, AUDIO-IRQ, LOW_BAT#)
     {NV_FALSE, 12, NvOdmWakeupPadPolarity_Low},     // Wake Event 12 - spi2_cs1 (HEADSET_DET, not used)
-    {NV_FALSE, 13, NvOdmWakeupPadPolarity_Low},     // Wake Event 13 - sdio1_dat1
+    {NV_TRUE,  13, NvOdmWakeupPadPolarity_Low},     // Wake Event 13 - sdio1_dat1 (WLAN_WAKE)
     {NV_FALSE, 14, NvOdmWakeupPadPolarity_High},    // Wake Event 14 - gp3_pv[6] (WLAN_INT)
     {NV_FALSE, 15, NvOdmWakeupPadPolarity_AnyEdge}, // Wake Event 15 - gmi_ad16  (SPI3_DOUT, DTV_SPI4_CS1)
     {NV_TRUE,  16, NvOdmWakeupPadPolarity_High},    // Wake Event 16 - rtc_irq
diff --git a/arch/arm/mach-tegra/odm_kit/query/ventana/nvodm_query.c b/arch/arm/mach-tegra/odm_kit/query/ventana/nvodm_query.c
index dfab844188a0..cbd4ad4932d2 100755
--- a/arch/arm/mach-tegra/odm_kit/query/ventana/nvodm_query.c
+++ b/arch/arm/mach-tegra/odm_kit/query/ventana/nvodm_query.c
@@ -65,7 +65,7 @@ static NvOdmWakeupPadInfo s_NvOdmWakeupPadInfo[] =
     {NV_FALSE, 10, NvOdmWakeupPadPolarity_High},    // Wake Event 10 - gmi_ad21 (Accelerometer_TH/TAP)
     {NV_FALSE,  11, NvOdmWakeupPadPolarity_Low},     // Wake Event 11 - spi2_cs2 (PEN_INT, AUDIO-IRQ, LOW_BAT#)
     {NV_FALSE, 12, NvOdmWakeupPadPolarity_Low},     // Wake Event 12 - spi2_cs1 (HEADSET_DET, not used)
-    {NV_FALSE, 13, NvOdmWakeupPadPolarity_Low},     // Wake Event 13 - sdio1_dat1
+    {NV_TRUE,  13, NvOdmWakeupPadPolarity_Low},     // Wake Event 13 - sdio1_dat1 (WLAN_WAKE)
     {NV_FALSE, 14, NvOdmWakeupPadPolarity_High},    // Wake Event 14 - gp3_pv[6] (WLAN_INT)
     {NV_FALSE, 15, NvOdmWakeupPadPolarity_AnyEdge}, // Wake Event 15 - gmi_ad16  (SPI3_DOUT, DTV_SPI4_CS1)
     {NV_TRUE, 16, NvOdmWakeupPadPolarity_High},    // Wake Event 16 - rtc_irq
diff --git a/arch/arm/mach-tegra/odm_kit/query/whistler/nvodm_query.c b/arch/arm/mach-tegra/odm_kit/query/whistler/nvodm_query.c
index 5b0c63bb8486..5526029823e5 100644..100755
--- a/arch/arm/mach-tegra/odm_kit/query/whistler/nvodm_query.c
+++ b/arch/arm/mach-tegra/odm_kit/query/whistler/nvodm_query.c
@@ -1581,7 +1581,7 @@ static NvOdmWakeupPadInfo s_NvOdmWakeupPadInfo[] =
     {NV_FALSE, 24, NvOdmWakeupPadPolarity_High},    // Wake Event 24 - gp3_pv[2] (BB_MOD, MODEM WAKEUP_AP15, SPI-SS)
     {NV_FALSE, 25, NvOdmWakeupPadPolarity_High},    // Wake Event 25 - gp3_ps[4] (KB_COL12)
     {NV_FALSE, 26, NvOdmWakeupPadPolarity_High},    // Wake Event 26 - gp3_ps[5] (KB_COL10)
-    {NV_FALSE, 27, NvOdmWakeupPadPolarity_High},    // Wake Event 27 - gp3_ps[0] (KB_COL8)
+    {NV_TRUE,  27, NvOdmWakeupPadPolarity_Low},    // Wake Event 27 - gp3_ps[0] (KB_COL8) / SDIO2_DAT1 (WLAN_WAKE)
     {NV_FALSE, 28, NvOdmWakeupPadPolarity_Low},     // Wake Event 28 - gp3_pq[6] (KB_ROW6)
     {NV_FALSE, 29, NvOdmWakeupPadPolarity_Low},     // Wake Event 29 - gp3_pq[7] (KB_ROW6)
     {NV_FALSE, 30, NvOdmWakeupPadPolarity_High}     // Wake Event 30 - dap1_dout (DAP1_DOUT)
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index 7d4006084eb1..60d23213e7d1 100755
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -23,6 +23,8 @@
 #define NV_DEBUG 0
 
 #include <linux/mmc/host.h>
+#include <linux/mmc/sdio_func.h>
+
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
 #include <linux/irq.h>
@@ -461,29 +463,26 @@ static int tegra_sdhci_suspend(struct device *dev)
 	int ret = 0;
 
 	if (host->card_always_on && is_card_sdio(sdhost->mmc->card)) {
-		struct mmc_ios ios;
-		ios.clock = 0;
-		ios.vdd = 0;
-		ios.power_mode = MMC_POWER_OFF;
-		ios.bus_width = MMC_BUS_WIDTH_1;
-		ios.timing = MMC_TIMING_LEGACY;
+		int div;
+		u16 clk;
+		unsigned int clock = 100000;
 
 		/* save interrupt status before suspending */
 		host->sdhci_ints = sdhci_readl(sdhost, SDHCI_INT_ENABLE);
-		sdhost->mmc->ops->set_ios(sdhost->mmc, &ios);
-		/* keep CARD_INT enabled - if used as wakeup source */
-		if (host->sdhci_ints & SDHCI_INT_CARD_INT) {
-			u32 ier = sdhci_readl(sdhost, SDHCI_INT_ENABLE);
-			ier |= SDHCI_INT_CARD_INT;
-			sdhci_writel(sdhost, ier, SDHCI_INT_ENABLE);
-			sdhci_writel(sdhost, ier, SDHCI_SIGNAL_ENABLE);
-
-			if (sdhost->quirks & SDHCI_QUIRK_ENABLE_INTERRUPT_AT_BLOCK_GAP) {
-				u8 gap_ctrl = sdhci_readb(sdhost, SDHCI_BLOCK_GAP_CONTROL);
-				gap_ctrl |= 0x8;
-				sdhci_writeb(sdhost, gap_ctrl, SDHCI_BLOCK_GAP_CONTROL);
-			}
+
+		/* reduce host controller clk and card clk to 100 KHz */
+		tegra_sdhci_set_clock(sdhost, clock);
+		sdhci_writew(sdhost, 0, SDHCI_CLOCK_CONTROL);
+
+		for (div = 1;div < 256;div *= 2) {
+			if ((sdhost->max_clk / div) <= clock)
+				break;
 		}
+		div >>= 1;
+
+		clk = div << SDHCI_DIVIDER_SHIFT;
+		clk |= SDHCI_CLOCK_INT_EN | SDHCI_CLOCK_CARD_EN;
+		sdhci_writew(sdhost, clk, SDHCI_CLOCK_CONTROL);
 
 		return ret;
 	}