ARM: shmobile: r8a7778: add USB support
Add USB clock and EHCI, OHCI, and USB PHY platform devices for R8A7778 SoC; add
a function to register PHY device with board-specific platform data and register
EHCI and OHCI platfrom devices from the init_late() board method.
Also, don't forget to enable CONFIG_ARCH_HAS_[EO]HCI options for R8A7778 SoC in
Kconfig...
The patch has been tested on the BOCK-W board.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
diff --git a/arch/arm/mach-shmobile/setup-r8a7778.c b/arch/arm/mach-shmobile/setup-r8a7778.c
index 1b9b7f2..f84885a 100644
--- a/arch/arm/mach-shmobile/setup-r8a7778.c
+++ b/arch/arm/mach-shmobile/setup-r8a7778.c
@@ -30,6 +30,12 @@
#include <linux/irqchip.h>
#include <linux/serial_sci.h>
#include <linux/sh_timer.h>
+#include <linux/pm_runtime.h>
+#include <linux/usb/phy.h>
+#include <linux/usb/hcd.h>
+#include <linux/usb/ehci_pdriver.h>
+#include <linux/usb/ohci_pdriver.h>
+#include <linux/dma-mapping.h>
#include <mach/irqs.h>
#include <mach/r8a7778.h>
#include <mach/common.h>
@@ -89,6 +95,99 @@
&sh_tmu##idx##_platform_data, \
sizeof(sh_tmu##idx##_platform_data))
+/* USB PHY */
+static struct resource usb_phy_resources[] __initdata = {
+ DEFINE_RES_MEM(0xffe70800, 0x100),
+ DEFINE_RES_MEM(0xffe76000, 0x100),
+};
+
+void __init r8a7778_add_usb_phy_device(struct rcar_phy_platform_data *pdata)
+{
+ platform_device_register_resndata(&platform_bus, "rcar_usb_phy", -1,
+ usb_phy_resources,
+ ARRAY_SIZE(usb_phy_resources),
+ pdata, sizeof(*pdata));
+}
+
+/* USB */
+static struct usb_phy *phy;
+
+static int usb_power_on(struct platform_device *pdev)
+{
+ if (IS_ERR(phy))
+ return PTR_ERR(phy);
+
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_get_sync(&pdev->dev);
+
+ usb_phy_init(phy);
+
+ return 0;
+}
+
+static void usb_power_off(struct platform_device *pdev)
+{
+ if (IS_ERR(phy))
+ return;
+
+ usb_phy_shutdown(phy);
+
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+}
+
+static int ehci_init_internal_buffer(struct usb_hcd *hcd)
+{
+ /*
+ * Below are recommended values from the datasheet;
+ * see [USB :: Setting of EHCI Internal Buffer].
+ */
+ /* EHCI IP internal buffer setting */
+ iowrite32(0x00ff0040, hcd->regs + 0x0094);
+ /* EHCI IP internal buffer enable */
+ iowrite32(0x00000001, hcd->regs + 0x009C);
+
+ return 0;
+}
+
+static struct usb_ehci_pdata ehci_pdata __initdata = {
+ .power_on = usb_power_on,
+ .power_off = usb_power_off,
+ .power_suspend = usb_power_off,
+ .pre_setup = ehci_init_internal_buffer,
+};
+
+static struct resource ehci_resources[] __initdata = {
+ DEFINE_RES_MEM(0xffe70000, 0x400),
+ DEFINE_RES_IRQ(gic_iid(0x4c)),
+};
+
+static struct usb_ohci_pdata ohci_pdata __initdata = {
+ .power_on = usb_power_on,
+ .power_off = usb_power_off,
+ .power_suspend = usb_power_off,
+};
+
+static struct resource ohci_resources[] __initdata = {
+ DEFINE_RES_MEM(0xffe70400, 0x400),
+ DEFINE_RES_IRQ(gic_iid(0x4c)),
+};
+
+#define USB_PLATFORM_INFO(hci) \
+static struct platform_device_info hci##_info __initdata = { \
+ .parent = &platform_bus, \
+ .name = #hci "-platform", \
+ .id = -1, \
+ .res = hci##_resources, \
+ .num_res = ARRAY_SIZE(hci##_resources), \
+ .data = &hci##_pdata, \
+ .size_data = sizeof(hci##_pdata), \
+ .dma_mask = DMA_BIT_MASK(32), \
+}
+
+USB_PLATFORM_INFO(ehci);
+USB_PLATFORM_INFO(ohci);
+
/* Ether */
static struct resource ether_resources[] = {
DEFINE_RES_MEM(0xfde00000, 0x400),
@@ -197,6 +296,14 @@
r8a7778_register_tmu(1);
}
+void __init r8a7778_init_late(void)
+{
+ phy = usb_get_phy(USB_PHY_TYPE_USB2);
+
+ platform_device_register_full(&ehci_info);
+ platform_device_register_full(&ohci_info);
+}
+
static struct renesas_intc_irqpin_config irqpin_platform_data = {
.irq_base = irq_pin(0), /* IRQ0 -> IRQ3 */
.sense_bitfield_width = 2,
@@ -310,6 +417,7 @@
.init_machine = r8a7778_add_standard_devices_dt,
.init_time = shmobile_timer_init,
.dt_compat = r8a7778_compat_dt,
+ .init_late = r8a7778_init_late,
MACHINE_END
#endif /* CONFIG_USE_OF */