xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

usb: add host support for the tilegx architecture

Browse Source 
This change adds OHCI and EHCI support for the tilegx's on-chip
USB hardware.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Chris Metcalf
2012-05-09 13:58:14 -04:00
parent d1cc1732cc
commit 47fc28bff8
8 changed files with 541 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
arch/tile/Kconfig
View File

@@ -396,6 +396,16 @@ config NO_IOPORT
source "drivers/pci/Kconfig"
config TILE_USB
tristate "Tilera USB host adapter support"
default y
depends on USB
depends on TILEGX
select TILE_GXIO_USB_HOST
---help---
Provides USB host adapter support for the built-in EHCI and OHCI
interfaces on TILE-Gx chips.
config HOTPLUG
bool "Support for hot-pluggable devices"
---help---

1
arch/tile/kernel/Makefile
View File

@@ -19,3 +19,4 @@ obj-$(CONFIG_PCI) += pci_gx.o
else
obj-$(CONFIG_PCI) += pci.o
endif
obj-$(CONFIG_TILE_USB) += usb.o

69
arch/tile/kernel/usb.c Normal file
View File

@@ -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);