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>
git-mirror · Oct 25, 2009 · f51f78c · f51f78c
1 parent 2fdc246
commit f51f78c
Show file tree

Hide file tree

Showing 3 changed files with 58 additions and 0 deletions.
diff --git a/arch/arm/mach-at91/at91sam9g45_devices.c b/arch/arm/mach-at91/at91sam9g45_devices.c
@@ -130,6 +130,62 @@ void __init at91_add_device_usbh_ohci(struct at91_usbh_data *data) {}
 #endif
 
 
+/* --------------------------------------------------------------------
+ *  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
@@ -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
@@ -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 {