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usb: ohci: remove ep93xx bus glue platform driver 

Convert ep93xx to use the OHCI platform driver and remove the
ohci-ep93xx bus glue driver.

Enable CONFIG_OHCI_HCD_PLATFORM in the ep93xx_defconfig so that USB
is still enabled by default on the EP93xx platform.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Ryan Mallon <rmallon@gmail.com>
Cc: Lennert Buytenhek <kernel@wantstofly.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Olof Johansson <olof@lixom.net>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten 2013-10-21 13:39:04 -07:00 committed by Greg Kroah-Hartman
parent f55055b464
commit e55f7cd246
6 changed files with 37 additions and 190 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/configs/ep93xx_defconfig
View File

@ -83,6 +83,7 @@ CONFIG_USB=y
CONFIG_USB_DEBUG=y
CONFIG_USB_DYNAMIC_MINORS=y
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_OHCI_HCD_PLATFORM=y
CONFIG_USB_STORAGE=y
CONFIG_USB_SERIAL=y
CONFIG_USB_SERIAL_CONSOLE=y

2
arch/arm/mach-ep93xx/clock.c
View File

@ -212,7 +212,7 @@ static struct clk_lookup clocks[] = {
INIT_CK(NULL, "hclk", &clk_h),
INIT_CK(NULL, "apb_pclk", &clk_p),
INIT_CK(NULL, "pll2", &clk_pll2),
INIT_CK("ep93xx-ohci", NULL, &clk_usb_host),
INIT_CK("ohci-platform", NULL, &clk_usb_host),
INIT_CK("ep93xx-keypad", NULL, &clk_keypad),
INIT_CK("ep93xx-fb", NULL, &clk_video),
INIT_CK("ep93xx-spi.0", NULL, &clk_spi),

41
arch/arm/mach-ep93xx/core.c
View File

@ -36,6 +36,7 @@
#include <linux/export.h>
#include <linux/irqchip/arm-vic.h>
#include <linux/reboot.h>
#include <linux/usb/ohci_pdriver.h>
#include <mach/hardware.h>
#include <linux/platform_data/video-ep93xx.h>
@ -297,25 +298,53 @@ static struct platform_device ep93xx_rtc_device = {
.resource = ep93xx_rtc_resource,
};
/*************************************************************************
* EP93xx OHCI USB Host
*************************************************************************/
static struct clk *ep93xx_ohci_host_clock;
static int ep93xx_ohci_power_on(struct platform_device *pdev)
{
if (!ep93xx_ohci_host_clock) {
ep93xx_ohci_host_clock = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(ep93xx_ohci_host_clock))
return PTR_ERR(ep93xx_ohci_host_clock);
}
return clk_enable(ep93xx_ohci_host_clock);
}
static void ep93xx_ohci_power_off(struct platform_device *pdev)
{
clk_disable(ep93xx_ohci_host_clock);
}
static struct usb_ohci_pdata ep93xx_ohci_pdata = {
.power_on = ep93xx_ohci_power_on,
.power_off = ep93xx_ohci_power_off,
.power_suspend = ep93xx_ohci_power_off,
};
static struct resource ep93xx_ohci_resources[] = {
DEFINE_RES_MEM(EP93XX_USB_PHYS_BASE, 0x1000),
DEFINE_RES_IRQ(IRQ_EP93XX_USB),
};
static u64 ep93xx_ohci_dma_mask = DMA_BIT_MASK(32);
static struct platform_device ep93xx_ohci_device = {
.name = "ep93xx-ohci",
.name = "ohci-platform",
.id = -1,
.dev = {
.dma_mask = &ep93xx_ohci_device.dev.coherent_dma_mask,
.coherent_dma_mask = DMA_BIT_MASK(32),
},
.num_resources = ARRAY_SIZE(ep93xx_ohci_resources),
.resource = ep93xx_ohci_resources,
.dev = {
.dma_mask = &ep93xx_ohci_dma_mask,
.coherent_dma_mask = DMA_BIT_MASK(32),
.platform_data = &ep93xx_ohci_pdata,
},
};
/*************************************************************************
* EP93xx physmap'ed flash
*************************************************************************/

8
drivers/usb/host/Kconfig
View File

@ -396,14 +396,6 @@ config USB_OHCI_HCD_LPC32XX
Enables support for the on-chip OHCI controller on
NXP chips.
config USB_OHCI_HCD_EP93XX
tristate "Support for EP93XX on-chip OHCI USB controller"
depends on USB_OHCI_HCD && ARCH_EP93XX
default y
---help---
Enables support for the on-chip OHCI controller on
EP93XX chips.
config USB_OHCI_HCD_PXA27X
tristate "Support for PXA27X/PXA3XX on-chip OHCI USB controller"
depends on USB_OHCI_HCD && (PXA27x || PXA3xx)

1
drivers/usb/host/Makefile
View File

@ -54,7 +54,6 @@ obj-$(CONFIG_USB_OHCI_HCD_SPEAR) += ohci-spear.o
obj-$(CONFIG_USB_OHCI_HCD_AT91) += ohci-at91.o
obj-$(CONFIG_USB_OHCI_HCD_S3C2410) += ohci-s3c2410.o
obj-$(CONFIG_USB_OHCI_HCD_LPC32XX) += ohci-nxp.o
obj-$(CONFIG_USB_OHCI_HCD_EP93XX) += ohci-ep93xx.o
obj-$(CONFIG_USB_OHCI_HCD_PXA27X) += ohci-pxa27x.o
obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o

174
drivers/usb/host/ohci-ep93xx.c
View File

@ -1,174 +0,0 @@
/*
* OHCI HCD (Host Controller Driver) for USB.
*
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
* (C) Copyright 2002 Hewlett-Packard Company
*
* Bus Glue for ep93xx.
*
* Written by Christopher Hoover <ch@hpl.hp.com>
* Based on fragments of previous driver by Russell King et al.
*
* Modified for LH7A404 from ohci-sa1111.c
* by Durgesh Pattamatta <pattamattad@sharpsec.com>
*
* Modified for pxa27x from ohci-lh7a404.c
* by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
*
* Modified for ep93xx from ohci-pxa27x.c
* by Lennert Buytenhek <buytenh@wantstofly.org> 28-2-2006
* Based on an earlier driver by Ray Lehtiniemi
*
* This file is licenced under the GPL.
*/
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/signal.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include "ohci.h"
#define DRIVER_DESC "OHCI EP93xx driver"
static const char hcd_name[] = "ohci-ep93xx";
static struct hc_driver __read_mostly ohci_ep93xx_hc_driver;
static struct clk *usb_host_clock;
static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd;
struct resource *res;
int irq;
int ret;
if (usb_disabled())
return -ENODEV;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENXIO;
hcd = usb_create_hcd(&ohci_ep93xx_hc_driver, &pdev->dev, "ep93xx");
if (!hcd)
return -ENOMEM;
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
hcd->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(hcd->regs)) {
ret = PTR_ERR(hcd->regs);
goto err_put_hcd;
}
usb_host_clock = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(usb_host_clock)) {
ret = PTR_ERR(usb_host_clock);
goto err_put_hcd;
}
clk_enable(usb_host_clock);
ret = usb_add_hcd(hcd, irq, 0);
if (ret)
goto err_clk_disable;
return 0;
err_clk_disable:
clk_disable(usb_host_clock);
err_put_hcd:
usb_put_hcd(hcd);
return ret;
}
static int ohci_hcd_ep93xx_drv_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
usb_remove_hcd(hcd);
clk_disable(usb_host_clock);
usb_put_hcd(hcd);
return 0;
}
#ifdef CONFIG_PM
static int ohci_hcd_ep93xx_drv_suspend(struct platform_device *pdev, pm_message_t state)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
if (time_before(jiffies, ohci->next_statechange))
msleep(5);
ohci->next_statechange = jiffies;
clk_disable(usb_host_clock);
return 0;
}
static int ohci_hcd_ep93xx_drv_resume(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
if (time_before(jiffies, ohci->next_statechange))
msleep(5);
ohci->next_statechange = jiffies;
clk_enable(usb_host_clock);
ohci_resume(hcd, false);
return 0;
}
#endif
static struct platform_driver ohci_hcd_ep93xx_driver = {
.probe = ohci_hcd_ep93xx_drv_probe,
.remove = ohci_hcd_ep93xx_drv_remove,
.shutdown = usb_hcd_platform_shutdown,
#ifdef CONFIG_PM
.suspend = ohci_hcd_ep93xx_drv_suspend,
.resume = ohci_hcd_ep93xx_drv_resume,
#endif
.driver = {
.name = "ep93xx-ohci",
.owner = THIS_MODULE,
},
};
static int __init ohci_ep93xx_init(void)
{
if (usb_disabled())
return -ENODEV;
pr_info("%s: " DRIVER_DESC "\n", hcd_name);
ohci_init_driver(&ohci_ep93xx_hc_driver, NULL);
return platform_driver_register(&ohci_hcd_ep93xx_driver);
}
module_init(ohci_ep93xx_init);
static void __exit ohci_ep93xx_cleanup(void)
{
platform_driver_unregister(&ohci_hcd_ep93xx_driver);
}
module_exit(ohci_ep93xx_cleanup);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:ep93xx-ohci");