OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

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>
This commit is contained in:
Nicolas Ferre 2009-09-25 12:11:32 +01:00 committed by Russell King
parent 2fdc246aaf
commit f51f78c06c
3 changed files with 58 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
arch/arm/mach-at91/at91sam9g45_devices.c
View File

@ -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)
* -------------------------------------------------------------------- */

1
arch/arm/mach-at91/board-sam9m10g45ek.c
View File

@ -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 */

1
arch/arm/mach-at91/include/mach/board.h
View File

@ -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 {