This patch adds support for the AMCC 440EP on-chip OHCI USB host controller. I tested it on the Bamboo and Yosemite boards using the 2.6.12 kernel.
This patch depends on Wade Farnsworth's "PPC440EP SoC and Bamboo board support" patch from 2005-04-07 and my "fix invalid function name usb_hcd_put in ohci-ppc-soc.c" patch from 2005-07-20: http://patchwork.ozlabs.org/linuxppc/patch?id=1311 http://patchwork.ozlabs.org/linuxppc/patch?id=1803 Comments are welcome. Signed-off-by: John Otken <jotken at softadvances.com> diff -uprN b/arch/ppc/platforms/4xx/bamboo.c c/arch/ppc/platforms/4xx/bamboo.c --- b/arch/ppc/platforms/4xx/bamboo.c 2005-07-24 16:14:36.000000000 -0500 +++ c/arch/ppc/platforms/4xx/bamboo.c 2005-07-25 06:34:52.498441038 -0500 @@ -431,5 +431,7 @@ void __init platform_init(unsigned long #ifdef CONFIG_KGDB ppc_md.early_serial_map = bamboo_early_serial_map; #endif + + SDR_WRITE( 0x320, 1 ); /* little endian usb (SDR0_USB0) */ } diff -uprN b/arch/ppc/platforms/4xx/ibm440ep.c c/arch/ppc/platforms/4xx/ibm440ep.c --- b/arch/ppc/platforms/4xx/ibm440ep.c 2005-07-24 16:14:36.000000000 -0500 +++ c/arch/ppc/platforms/4xx/ibm440ep.c 2005-07-24 18:00:38.000000000 -0500 @@ -187,3 +187,44 @@ struct ppc4xx_uic_settings ppc4xx_core_u }, }; +static struct resource ohci_usb_resources[] = { + [0] = { + .start = 0x0EF601000, + .end = 0x0EF601000 + 0x80 - 1, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = 40, + .end = 40, + .flags = IORESOURCE_IRQ, + }, +}; + +static u64 dma_mask = 0xffffffffULL; + +#include <asm/usb.h> + +static struct usb_hcd_platform_data platform_data; + +static struct platform_device ohci_usb_device = { + .name = "ppc-soc-ohci", + .id = 0, + .num_resources = ARRAY_SIZE(ohci_usb_resources), + .resource = ohci_usb_resources, + .dev = { + .dma_mask = &dma_mask, + .coherent_dma_mask = 0xffffffffULL, + .platform_data = &platform_data, + } +}; + +static struct platform_device *ibm440ep_devs[] __initdata = { + &ohci_usb_device, +}; + +static int __init + ibm440ep_platform_add_devices(void) +{ + return platform_add_devices(ibm440ep_devs, ARRAY_SIZE(ibm440ep_devs)); +} +arch_initcall(ibm440ep_platform_add_devices); diff -uprN b/drivers/usb/host/Kconfig c/drivers/usb/host/Kconfig --- b/drivers/usb/host/Kconfig 2005-07-14 09:48:19.000000000 -0500 +++ c/drivers/usb/host/Kconfig 2005-07-24 18:00:38.000000000 -0500 @@ -68,7 +68,7 @@ config USB_OHCI_HCD config USB_OHCI_HCD_PPC_SOC bool "OHCI support for on-chip PPC USB controller" - depends on USB_OHCI_HCD && (STB03xxx || PPC_MPC52xx) + depends on USB_OHCI_HCD && (STB03xxx || PPC_MPC52xx || 440EP) default y select USB_OHCI_BIG_ENDIAN ---help--- @@ -92,7 +92,7 @@ config USB_OHCI_BIG_ENDIAN config USB_OHCI_LITTLE_ENDIAN bool depends on USB_OHCI_HCD - default n if STB03xxx || PPC_MPC52xx + default n if STB03xxx || PPC_MPC52xx || 440EP default y config USB_UHCI_HCD diff -uprN b/include/asm-ppc/usb.h c/include/asm-ppc/usb.h --- b/include/asm-ppc/usb.h 1969-12-31 17:00:00.000000000 -0700 +++ c/include/asm-ppc/usb.h 2005-07-24 18:00:38.000000000 -0500 @@ -0,0 +1,13 @@ +/* + * ppc/usb.h: + * + */ +#ifndef _PPC_USB_H +#define _PPC_USB_H + +struct usb_hcd_platform_data { + int (*start) (struct platform_device *pdev); + void (*stop) (struct platform_device *pdev); +}; + +#endif /* !(_PPC_USB_H) */
