From bb9c1f7c8077f463b309f600d449979c52507b6e Mon Sep 17 00:00:00 2001
From: wlf <wulf@rock-chips.com>
Date: Fri, 18 Apr 2014 09:40:16 +0800
Subject: [PATCH] USB: Add rk_usb_power_up and power_down function.

---
 drivers/usb/dwc_otg_310/dwc_otg_driver.c | 79 ++++++++++++++++++++++++
 drivers/usb/dwc_otg_310/usbdev_rk.h      |  2 +
 2 files changed, 81 insertions(+)

diff --git a/drivers/usb/dwc_otg_310/dwc_otg_driver.c b/drivers/usb/dwc_otg_310/dwc_otg_driver.c
index 93d1d2ea401b..49026c432d17 100755
--- a/drivers/usb/dwc_otg_310/dwc_otg_driver.c
+++ b/drivers/usb/dwc_otg_310/dwc_otg_driver.c
@@ -104,6 +104,9 @@ static struct usb20host_pdata_id usb20host_pdata[] = {
 };
 #endif
 
+#ifdef CONFIG_RK_USB_UART
+static u32 usb_to_uart_status;
+#endif
 /*-------------------------------------------------------------------------*/
 /* Encapsulate the module parameter settings */
 
@@ -1571,6 +1574,82 @@ static struct platform_driver dwc_otg_driver = {
 };
 #endif
 
+void rk_usb_power_up(void)
+{
+	struct dwc_otg_platform_data *pldata_otg;
+	struct dwc_otg_platform_data *pldata_host;
+	struct rkehci_platform_data *pldata_ehci;
+
+	if(cpu_is_rk3288()){
+#ifdef CONFIG_RK_USB_UART
+		/* enable USB bypass UART function  */
+		writel_relaxed(0x00c00000 | usb_to_uart_status, RK_GRF_VIRT + RK3288_GRF_UOC0_CON3);
+
+#endif
+		/* unset siddq,the analog blocks are powered up */
+#ifdef CONFIG_USB20_OTG
+		if((pldata_otg = &usb20otg_pdata_rk3288)){
+			if(pldata_otg->phy_status == USB_PHY_SUSPEND)
+				writel_relaxed((0x01<<13)<<16, RK_GRF_VIRT + RK3288_GRF_UOC0_CON0);
+		}
+#endif
+#ifdef CONFIG_USB20_HOST
+		if((pldata_host = &usb20host_pdata_rk3288)){
+			if(pldata_host->phy_status == USB_PHY_SUSPEND)
+				writel_relaxed((0x01<<13)<<16, RK_GRF_VIRT + RK3288_GRF_UOC2_CON0);
+		}
+#endif
+#ifdef CONFIG_USB_EHCI_RK
+		if((pldata_ehci = &rkehci_pdata_rk3288)){
+			if(pldata_ehci->phy_status == USB_PHY_SUSPEND)
+				writel_relaxed((0x01<<13)<<16, RK_GRF_VIRT + RK3288_GRF_UOC1_CON0);
+		}
+#endif
+
+	}
+}
+
+void rk_usb_power_down(void)
+{
+	struct dwc_otg_platform_data *pldata_otg;
+	struct dwc_otg_platform_data *pldata_host;
+	struct rkehci_platform_data *pldata_ehci;
+
+	if(cpu_is_rk3288()){
+#ifdef CONFIG_RK_USB_UART
+		/* disable USB bypass UART function */
+		usb_to_uart_status = readl_relaxed(RK_GRF_VIRT + RK3288_GRF_UOC0_CON3);
+		writel_relaxed(0x00c00000, RK_GRF_VIRT + RK3288_GRF_UOC0_CON3);
+#endif
+		/* set siddq,the analog blocks are powered down
+		 * note:
+		 * 1. Before asserting SIDDQ, ensure that VDATSRCENB0,
+		 * VDATDETENB0, DCDENB0, BYPASSSEL0, ADPPRBENB0,
+		 * and TESTBURNIN are set to 1'b0.
+		 * 2. Before asserting SIDDQ, ensure that phy enter suspend.*/
+#ifdef CONFIG_USB20_OTG
+		if((pldata_otg = &usb20otg_pdata_rk3288)){
+			if(pldata_otg->phy_status == USB_PHY_SUSPEND)
+				writel_relaxed((0x01<<13)|((0x01<<13)<<16), RK_GRF_VIRT + RK3288_GRF_UOC0_CON0);
+		}
+#endif
+#ifdef CONFIG_USB20_HOST
+		if((pldata_host = &usb20host_pdata_rk3288)){
+			if(pldata_host->phy_status == USB_PHY_SUSPEND)
+				writel_relaxed((0x01<<13)|((0x01<<13)<<16), RK_GRF_VIRT + RK3288_GRF_UOC2_CON0);
+		}
+#endif
+#ifdef CONFIG_USB_EHCI_RK
+		if((pldata_ehci = &rkehci_pdata_rk3288)){
+			if(pldata_ehci->phy_status == USB_PHY_SUSPEND)
+				writel_relaxed((0x01<<13)|((0x01<<13)<<16), RK_GRF_VIRT + RK3288_GRF_UOC1_CON0);
+		}
+#endif
+	}
+}
+
+EXPORT_SYMBOL(rk_usb_power_up);
+EXPORT_SYMBOL(rk_usb_power_down);
 /**
  * This function is called when the dwc_otg_driver is installed with the
  * insmod command. It registers the dwc_otg_driver structure with the
diff --git a/drivers/usb/dwc_otg_310/usbdev_rk.h b/drivers/usb/dwc_otg_310/usbdev_rk.h
index 16d447be9305..5812703042ba 100755
--- a/drivers/usb/dwc_otg_310/usbdev_rk.h
+++ b/drivers/usb/dwc_otg_310/usbdev_rk.h
@@ -19,6 +19,8 @@
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/rockchip/cru.h>
+#include <linux/rockchip/grf.h>
+#include <linux/rockchip/cpu.h>
 
 #include "usbdev_grf_regs.h"
 #include "usbdev_bc.h"
-- 
2.34.1