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>

4 files changed, 117 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/Kconfig b/arch/arm/mach-shmobile/Kconfig
index 5414402938a5..757c4e97375f 100644
--- a/arch/arm/mach-shmobile/Kconfig
+++ b/arch/arm/mach-shmobile/Kconfig
@@ -41,6 +41,8 @@ config ARCH_R8A7778
         select CPU_V7
         select SH_CLK_CPG
         select ARM_GIC
+        select USB_ARCH_HAS_EHCI
+        select USB_ARCH_HAS_OHCI
 
 config ARCH_R8A7779
         bool "R-Car H1 (R8A77790)"
diff --git a/arch/arm/mach-shmobile/clock-r8a7778.c b/arch/arm/mach-shmobile/clock-r8a7778.c
index b251e4d0924d..696d206adc3f 100644
--- a/arch/arm/mach-shmobile/clock-r8a7778.c
+++ b/arch/arm/mach-shmobile/clock-r8a7778.c
@@ -105,6 +105,7 @@ static struct clk *main_clks[] = {
 enum {
         MSTP323, MSTP322, MSTP321,
         MSTP114,
+        MSTP100,
         MSTP026, MSTP025, MSTP024, MSTP023, MSTP022, MSTP021,
         MSTP016, MSTP015,
         MSTP_NR };
@@ -114,6 +115,7 @@ static struct clk mstp_clks[MSTP_NR] = {
         [MSTP322] = SH_CLK_MSTP32(&p_clk, MSTPCR3, 22, 0), /* SDHI1 */
         [MSTP321] = SH_CLK_MSTP32(&p_clk, MSTPCR3, 21, 0), /* SDHI2 */
         [MSTP114] = SH_CLK_MSTP32(&p_clk, MSTPCR1, 14, 0), /* Ether */
+        [MSTP100] = SH_CLK_MSTP32(&p_clk, MSTPCR1,  0, 0), /* USB0/1 */
         [MSTP026] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 26, 0), /* SCIF0 */
         [MSTP025] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 25, 0), /* SCIF1 */
         [MSTP024] = SH_CLK_MSTP32(&p_clk, MSTPCR0, 24, 0), /* SCIF2 */
@@ -130,6 +132,8 @@ static struct clk_lookup lookups[] = {
         CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[MSTP322]), /* SDHI1 */
         CLKDEV_DEV_ID("sh_mobile_sdhi.2", &mstp_clks[MSTP321]), /* SDHI2 */
         CLKDEV_DEV_ID("sh-eth", &mstp_clks[MSTP114]), /* Ether */
+        CLKDEV_DEV_ID("ehci-platform", &mstp_clks[MSTP100]), /* USB EHCI port0/1 */
+        CLKDEV_DEV_ID("ohci-platform", &mstp_clks[MSTP100]), /* USB OHCI port0/1 */
         CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP026]), /* SCIF0 */
         CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP025]), /* SCIF1 */
         CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP024]), /* SCIF2 */
diff --git a/arch/arm/mach-shmobile/include/mach/r8a7778.h b/arch/arm/mach-shmobile/include/mach/r8a7778.h
index ae65b459483f..1d4207cc0b04 100644
--- a/arch/arm/mach-shmobile/include/mach/r8a7778.h
+++ b/arch/arm/mach-shmobile/include/mach/r8a7778.h
@@ -20,10 +20,13 @@
 
 #include <linux/mmc/sh_mobile_sdhi.h>
 #include <linux/sh_eth.h>
+#include <linux/platform_data/usb-rcar-phy.h>
 
 extern void r8a7778_add_standard_devices(void);
 extern void r8a7778_add_standard_devices_dt(void);
 extern void r8a7778_add_ether_device(struct sh_eth_plat_data *pdata);
+extern void r8a7778_add_usb_phy_device(struct rcar_phy_platform_data *pdata);
+extern void r8a7778_init_late(void);
 extern void r8a7778_init_delay(void);
 extern void r8a7778_init_irq(void);
 extern void r8a7778_init_irq_dt(void);
diff --git a/arch/arm/mach-shmobile/setup-r8a7778.c b/arch/arm/mach-shmobile/setup-r8a7778.c
index 1b9b7f2a5016..f84885a71f6f 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 @@ static struct sh_timer_config sh_tmu1_platform_data = {
                 &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 @@ void __init r8a7778_add_standard_devices(void)
         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 @@ DT_MACHINE_START(R8A7778_DT, "Generic R8A7778 (Flattened Device Tree)")
         .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 */