ARM: 5726/1: at91/USB: at91sam9g45 series USB host integration

This is the at91 specific part of USB host integration. The EHCI high speed
controller has a companion OHCI controller to manage USB full and low speed.
They are sharing the same IRQ line and vbus pin.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

3 files changed, 58 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
index d581cff80c4c..003f4f91fa52 100644
--- a/arch/arm/mach-at91/at91sam9g45_devices.c
+++ b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -131,6 +131,62 @@ void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data) {}
 
 
 /* --------------------------------------------------------------------
+ *  USB Host HS (EHCI)
+ *  Needs an OHCI host for low and full speed management
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_USB_EHCI_HCD) || defined(CONFIG_USB_EHCI_HCD_MODULE)
+static u64 ehci_dmamask = DMA_BIT_MASK(32);
+static struct at91_usbh_data usbh_ehci_data;
+
+static struct resource usbh_ehci_resources[] = {
+        [0] = {
+                .start  = AT91SAM9G45_EHCI_BASE,
+                .end    = AT91SAM9G45_EHCI_BASE + SZ_1M - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = AT91SAM9G45_ID_UHPHS,
+                .end    = AT91SAM9G45_ID_UHPHS,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device at91_usbh_ehci_device = {
+        .name           = "atmel-ehci",
+        .id             = -1,
+        .dev            = {
+                                .dma_mask               = &ehci_dmamask,
+                                .coherent_dma_mask      = DMA_BIT_MASK(32),
+                                .platform_data          = &usbh_ehci_data,
+        },
+        .resource       = usbh_ehci_resources,
+        .num_resources  = ARRAY_SIZE(usbh_ehci_resources),
+};
+
+void __init at91_add_device_usbh_ehci(struct at91_usbh_data *data)
+{
+        int i;
+
+        if (!data)
+                return;
+
+        /* Enable VBus control for UHP ports */
+        for (i = 0; i < data->ports; i++) {
+                if (data->vbus_pin[i])
+                        at91_set_gpio_output(data->vbus_pin[i], 0);
+        }
+
+        usbh_ehci_data = *data;
+        at91_clock_associate("uhphs_clk", &at91_usbh_ehci_device.dev, "ehci_clk");
+        platform_device_register(&at91_usbh_ehci_device);
+}
+#else
+void __init at91_add_device_usbh_ehci(struct at91_usbh_data *data) {}
+#endif
+
+
+/* --------------------------------------------------------------------
  *  USB HS Device (Gadget)
  * -------------------------------------------------------------------- */
 
diff --git a/arch/arm/mach-at91/board-sam9m10g45ek.c b/arch/arm/mach-at91/board-sam9m10g45ek.c
index 64c3843f323d..1cf4d8681078 100644
--- a/arch/arm/mach-at91/board-sam9m10g45ek.c
+++ b/arch/arm/mach-at91/board-sam9m10g45ek.c
@@ -366,6 +366,7 @@ static void __init ek_board_init(void)
         at91_add_device_serial();
         /* USB HS Host */
         at91_add_device_usbh_ohci(&ek_usbh_hs_data);
+        at91_add_device_usbh_ehci(&ek_usbh_hs_data);
         /* USB HS Device */
         at91_add_device_usba(&ek_usba_udc_data);
         /* SPI */
diff --git a/arch/arm/mach-at91/include/mach/board.h b/arch/arm/mach-at91/include/mach/board.h
index 2f4fcedc02ba..2295d80dd893 100644
--- a/arch/arm/mach-at91/include/mach/board.h
+++ b/arch/arm/mach-at91/include/mach/board.h
@@ -98,6 +98,7 @@ struct at91_usbh_data {
 };
 extern void __init at91_add_device_usbh(struct at91_usbh_data *data);
 extern void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data);
+extern void __init at91_add_device_usbh_ehci(struct at91_usbh_data *data);
 
  /* NAND / SmartMedia */
 struct atmel_nand_data {