+static atomic_t rt3352_usb_use_count = ATOMIC_INIT(0);
+
+static void rt3352_usb_host_start(void)
+{
+ u32 t;
+
+ if (atomic_inc_return(&rt3352_usb_use_count) != 1)
+ return;
+
+ t = rt305x_sysc_rr(RT3352_SYSC_REG_USB_PS);
+
+ /* enable clock for port0's and port1's phys */
+ t = rt305x_sysc_rr(RT3352_SYSC_REG_CLKCFG1);
+ t = t | RT3352_CLKCFG1_UPHY0_CLK_EN | RT3352_CLKCFG1_UPHY1_CLK_EN;
+ rt305x_sysc_wr(t, RT3352_SYSC_REG_CLKCFG1);
+ mdelay(500);
+
+ /* pull USBHOST and USBDEV out from reset */
+ t = rt305x_sysc_rr(RT3352_SYSC_REG_RSTCTRL);
+ t &= ~(RT3352_RSTCTRL_UHST | RT3352_RSTCTRL_UDEV);
+ rt305x_sysc_wr(t, RT3352_SYSC_REG_RSTCTRL);
+ mdelay(500);
+
+ /* enable host mode */
+ t = rt305x_sysc_rr(RT3352_SYSC_REG_SYSCFG1);
+ t |= RT3352_SYSCFG1_USB0_HOST_MODE;
+ rt305x_sysc_wr(t, RT3352_SYSC_REG_SYSCFG1);
+
+ t = rt305x_sysc_rr(RT3352_SYSC_REG_USB_PS);
+}
+
+static void rt3352_usb_host_stop(void)
+{
+ u32 t;
+
+ if (atomic_dec_return(&rt3352_usb_use_count) != 0)
+ return;
+
+ /* put USBHOST and USBDEV into reset */
+ t = rt305x_sysc_rr(RT3352_SYSC_REG_RSTCTRL);
+ t |= RT3352_RSTCTRL_UHST | RT3352_RSTCTRL_UDEV;
+ rt305x_sysc_wr(t, RT3352_SYSC_REG_RSTCTRL);
+ udelay(10000);
+
+ /* disable clock for port0's and port1's phys*/
+ t = rt305x_sysc_rr(RT3352_SYSC_REG_CLKCFG1);
+ t &= ~(RT3352_CLKCFG1_UPHY0_CLK_EN | RT3352_CLKCFG1_UPHY1_CLK_EN);
+ rt305x_sysc_wr(t, RT3352_SYSC_REG_CLKCFG1);
+ udelay(10000);
+}
+
+static struct rt3883_ehci_platform_data rt3352_ehci_data = {
+ .start_hw = rt3352_usb_host_start,
+ .stop_hw = rt3352_usb_host_stop,
+};
+
+static struct resource rt3352_ehci_resources[] = {
+ {
+ .start = RT3352_EHCI_BASE,
+ .end = RT3352_EHCI_BASE + RT3352_EHCI_SIZE - 1,
+ .flags = IORESOURCE_MEM,
+ }, {
+ .start = RT305X_INTC_IRQ_OTG,
+ .end = RT305X_INTC_IRQ_OTG,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static u64 rt3352_ehci_dmamask = DMA_BIT_MASK(32);
+static struct platform_device rt3352_ehci_device = {
+ .name = "rt3352-ehci",
+ .id = -1,
+ .resource = rt3352_ehci_resources,
+ .num_resources = ARRAY_SIZE(rt3352_ehci_resources),
+ .dev = {
+ .dma_mask = &rt3352_ehci_dmamask,
+ .coherent_dma_mask = DMA_BIT_MASK(32),
+ .platform_data = &rt3352_ehci_data,
+ },
+};
+
+static struct resource rt3352_ohci_resources[] = {
+ {
+ .start = RT3352_OHCI_BASE,
+ .end = RT3352_OHCI_BASE + RT3352_OHCI_SIZE - 1,
+ .flags = IORESOURCE_MEM,
+ }, {
+ .start = RT305X_INTC_IRQ_OTG,
+ .end = RT305X_INTC_IRQ_OTG,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct rt3883_ohci_platform_data rt3352_ohci_data = {
+ .start_hw = rt3352_usb_host_start,
+ .stop_hw = rt3352_usb_host_stop,
+};
+
+static u64 rt3352_ohci_dmamask = DMA_BIT_MASK(32);
+static struct platform_device rt3352_ohci_device = {
+ .name = "rt3352-ohci",
+ .id = -1,
+ .resource = rt3352_ohci_resources,
+ .num_resources = ARRAY_SIZE(rt3352_ohci_resources),
+ .dev = {
+ .dma_mask = &rt3352_ohci_dmamask,
+ .coherent_dma_mask = DMA_BIT_MASK(32),
+ .platform_data = &rt3352_ohci_data,
+ },
+};
+