diff options
| author | Chris Metcalf <cmetcalf@tilera.com> | 2012-05-09 13:58:14 -0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2012-07-18 16:40:29 -0400 |
| commit | 47fc28bff82a4dd5f6b41c97e335d10fc78a8e9a (patch) | |
| tree | 829b845956f9f5f6b2997424fa1d6d72244b0d1b /arch/tile/kernel | |
| parent | d1cc1732cc62034542b042a4506d7c5043bc5e5e (diff) | |
usb: add host support for the tilegx architecture
This change adds OHCI and EHCI support for the tilegx's on-chip
USB hardware.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/kernel')
| -rw-r--r-- | arch/tile/kernel/Makefile | 1 | ||||
| -rw-r--r-- | arch/tile/kernel/usb.c | 69 |
2 files changed, 70 insertions, 0 deletions
diff --git a/arch/tile/kernel/Makefile b/arch/tile/kernel/Makefile index 49d4ce3cd7f4..5334be8e2538 100644 --- a/arch/tile/kernel/Makefile +++ b/arch/tile/kernel/Makefile @@ -19,3 +19,4 @@ obj-$(CONFIG_PCI) += pci_gx.o else obj-$(CONFIG_PCI) += pci.o endif +obj-$(CONFIG_TILE_USB) += usb.o diff --git a/arch/tile/kernel/usb.c b/arch/tile/kernel/usb.c new file mode 100644 index 000000000000..5af8debc6a71 --- /dev/null +++ b/arch/tile/kernel/usb.c @@ -0,0 +1,69 @@ +/* + * Copyright 2012 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + * + * Register the Tile-Gx USB interfaces as platform devices. + * + * The actual USB driver is just some glue (in + * drivers/usb/host/[eo]hci-tilegx.c) which makes the registers available + * to the standard kernel EHCI and OHCI drivers. + */ + +#include <linux/dma-mapping.h> +#include <linux/platform_device.h> +#include <linux/usb/tilegx.h> +#include <linux/types.h> + +static u64 ehci_dmamask = DMA_BIT_MASK(32); + +#define USB_HOST_DEF(unit, type, dmamask) \ + static struct \ + tilegx_usb_platform_data tilegx_usb_platform_data_ ## type ## \ + hci ## unit = { \ + .dev_index = unit, \ + }; \ + \ + static struct platform_device tilegx_usb_ ## type ## hci ## unit = { \ + .name = "tilegx-" #type "hci", \ + .id = unit, \ + .dev = { \ + .dma_mask = dmamask, \ + .coherent_dma_mask = DMA_BIT_MASK(32), \ + .platform_data = \ + &tilegx_usb_platform_data_ ## type ## hci ## \ + unit, \ + }, \ + }; + +USB_HOST_DEF(0, e, &ehci_dmamask) +USB_HOST_DEF(0, o, NULL) +USB_HOST_DEF(1, e, &ehci_dmamask) +USB_HOST_DEF(1, o, NULL) + +#undef USB_HOST_DEF + +static struct platform_device *tilegx_usb_devices[] __initdata = { + &tilegx_usb_ehci0, + &tilegx_usb_ehci1, + &tilegx_usb_ohci0, + &tilegx_usb_ohci1, +}; + +/** Add our set of possible USB devices. */ +static int __init tilegx_usb_init(void) +{ + platform_add_devices(tilegx_usb_devices, + ARRAY_SIZE(tilegx_usb_devices)); + + return 0; +} +arch_initcall(tilegx_usb_init); |