[PATCH] USB: add support for OCHI on AT91rm9200
This adds support for OHCI on AT91rm9200 based boards. Possibly of interest here is the way this uses <linux/clk.h> to gate clocks on/off during system pm state transitions. That's typical for non-PCI systems. Some can go further; Mini-A host side connectors enable ID-pin sensing. From: Andrew Victor <andrew@sanpeople.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Andrew Victor
Greg Kroah-Hartman
Родитель
d085229938
Коммит
39a269c09f
|
|
@ -23,6 +23,7 @@ config USB_ARCH_HAS_OHCI
|
|||
default y if ARCH_LH7A404
|
||||
default y if ARCH_S3C2410
|
||||
default y if PXA27x
|
||||
default y if ARCH_AT91RM9200
|
||||
# PPC:
|
||||
default y if STB03xxx
|
||||
default y if PPC_MPC52xx
|
||||
|
|
|
|||
|
|
@ -15,6 +15,7 @@ obj-$(CONFIG_USB_OHCI_HCD) += host/
|
|||
obj-$(CONFIG_USB_UHCI_HCD) += host/
|
||||
obj-$(CONFIG_USB_SL811_HCD) += host/
|
||||
obj-$(CONFIG_ETRAX_USB_HOST) += host/
|
||||
obj-$(CONFIG_USB_OHCI_AT91) += host/
|
||||
|
||||
obj-$(CONFIG_USB_ACM) += class/
|
||||
obj-$(CONFIG_USB_PRINTER) += class/
|
||||
|
|
|
|||
|
|
@ -0,0 +1,306 @@
|
|||
/*
|
||||
* OHCI HCD (Host Controller Driver) for USB.
|
||||
*
|
||||
* Copyright (C) 2004 SAN People (Pty) Ltd.
|
||||
* Copyright (C) 2005 Thibaut VARENE <varenet@parisc-linux.org>
|
||||
*
|
||||
* AT91RM9200 Bus Glue
|
||||
*
|
||||
* Based on fragments of 2.4 driver by Rick Bronson.
|
||||
* Based on ohci-omap.c
|
||||
*
|
||||
* This file is licenced under the GPL.
|
||||
*/
|
||||
|
||||
#include <linux/clk.h>
|
||||
#include <linux/platform_device.h>
|
||||
|
||||
#include <asm/mach-types.h>
|
||||
#include <asm/hardware.h>
|
||||
#include <asm/arch/board.h>
|
||||
|
||||
#ifndef CONFIG_ARCH_AT91RM9200
|
||||
#error "This file is AT91RM9200 bus glue. CONFIG_ARCH_AT91RM9200 must be defined."
|
||||
#endif
|
||||
|
||||
/* interface and function clocks */
|
||||
static struct clk *iclk, *fclk;
|
||||
|
||||
extern int usb_disabled(void);
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
static void at91_start_hc(struct platform_device *pdev)
|
||||
{
|
||||
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
||||
struct ohci_regs __iomem *regs = hcd->regs;
|
||||
|
||||
dev_dbg(&pdev->dev, "starting AT91RM9200 OHCI USB Controller\n");
|
||||
|
||||
/*
|
||||
* Start the USB clocks.
|
||||
*/
|
||||
clk_enable(iclk);
|
||||
clk_enable(fclk);
|
||||
|
||||
/*
|
||||
* The USB host controller must remain in reset.
|
||||
*/
|
||||
writel(0, ®s->control);
|
||||
}
|
||||
|
||||
static void at91_stop_hc(struct platform_device *pdev)
|
||||
{
|
||||
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
||||
struct ohci_regs __iomem *regs = hcd->regs;
|
||||
|
||||
dev_dbg(&pdev->dev, "stopping AT91RM9200 OHCI USB Controller\n");
|
||||
|
||||
/*
|
||||
* Put the USB host controller into reset.
|
||||
*/
|
||||
writel(0, ®s->control);
|
||||
|
||||
/*
|
||||
* Stop the USB clocks.
|
||||
*/
|
||||
clk_disable(fclk);
|
||||
clk_disable(iclk);
|
||||
}
|
||||
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
static int usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *);
|
||||
|
||||
/* configure so an HC device and id are always provided */
|
||||
/* always called with process context; sleeping is OK */
|
||||
|
||||
|
||||
/**
|
||||
* usb_hcd_at91_probe - initialize AT91RM9200-based HCDs
|
||||
* Context: !in_interrupt()
|
||||
*
|
||||
* Allocates basic resources for this USB host controller, and
|
||||
* then invokes the start() method for the HCD associated with it
|
||||
* through the hotplug entry's driver_data.
|
||||
*
|
||||
* Store this function in the HCD's struct pci_driver as probe().
|
||||
*/
|
||||
int usb_hcd_at91_probe (const struct hc_driver *driver, struct platform_device *pdev)
|
||||
{
|
||||
int retval;
|
||||
struct usb_hcd *hcd = NULL;
|
||||
|
||||
if (pdev->num_resources != 2) {
|
||||
pr_debug("hcd probe: invalid num_resources");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
if ((pdev->resource[0].flags != IORESOURCE_MEM) || (pdev->resource[1].flags != IORESOURCE_IRQ)) {
|
||||
pr_debug("hcd probe: invalid resource type\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
hcd = usb_create_hcd(driver, &pdev->dev, "at91rm9200");
|
||||
if (!hcd)
|
||||
return -ENOMEM;
|
||||
hcd->rsrc_start = pdev->resource[0].start;
|
||||
hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
|
||||
|
||||
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
|
||||
pr_debug("request_mem_region failed\n");
|
||||
retval = -EBUSY;
|
||||
goto err1;
|
||||
}
|
||||
|
||||
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
|
||||
if (!hcd->regs) {
|
||||
pr_debug("ioremap failed\n");
|
||||
retval = -EIO;
|
||||
goto err2;
|
||||
}
|
||||
|
||||
iclk = clk_get(&pdev->dev, "ohci_clk");
|
||||
fclk = clk_get(&pdev->dev, "uhpck");
|
||||
|
||||
at91_start_hc(pdev);
|
||||
ohci_hcd_init(hcd_to_ohci(hcd));
|
||||
|
||||
retval = usb_add_hcd(hcd, pdev->resource[1].start, SA_INTERRUPT);
|
||||
if (retval == 0)
|
||||
return retval;
|
||||
|
||||
/* Error handling */
|
||||
at91_stop_hc(pdev);
|
||||
|
||||
clk_put(fclk);
|
||||
clk_put(iclk);
|
||||
|
||||
iounmap(hcd->regs);
|
||||
|
||||
err2:
|
||||
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
||||
|
||||
err1:
|
||||
usb_put_hcd(hcd);
|
||||
return retval;
|
||||
}
|
||||
|
||||
|
||||
/* may be called without controller electrically present */
|
||||
/* may be called with controller, bus, and devices active */
|
||||
|
||||
/**
|
||||
* usb_hcd_at91_remove - shutdown processing for AT91RM9200-based HCDs
|
||||
* @dev: USB Host Controller being removed
|
||||
* Context: !in_interrupt()
|
||||
*
|
||||
* Reverses the effect of usb_hcd_at91_probe(), first invoking
|
||||
* the HCD's stop() method. It is always called from a thread
|
||||
* context, normally "rmmod", "apmd", or something similar.
|
||||
*
|
||||
*/
|
||||
static int usb_hcd_at91_remove (struct usb_hcd *hcd, struct platform_device *pdev)
|
||||
{
|
||||
usb_remove_hcd(hcd);
|
||||
at91_stop_hc(pdev);
|
||||
iounmap(hcd->regs);
|
||||
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
||||
|
||||
clk_put(fclk);
|
||||
clk_put(iclk);
|
||||
fclk = iclk = NULL;
|
||||
|
||||
dev_set_drvdata(&pdev->dev, NULL);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
static int __devinit
|
||||
ohci_at91_start (struct usb_hcd *hcd)
|
||||
{
|
||||
// struct at91_ohci_data *board = hcd->self.controller->platform_data;
|
||||
struct ohci_hcd *ohci = hcd_to_ohci (hcd);
|
||||
int ret;
|
||||
|
||||
if ((ret = ohci_init(ohci)) < 0)
|
||||
return ret;
|
||||
|
||||
if ((ret = ohci_run(ohci)) < 0) {
|
||||
err("can't start %s", hcd->self.bus_name);
|
||||
ohci_stop(hcd);
|
||||
return ret;
|
||||
}
|
||||
// hcd->self.root_hub->maxchild = board->ports;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
static const struct hc_driver ohci_at91_hc_driver = {
|
||||
.description = hcd_name,
|
||||
.product_desc = "AT91RM9200 OHCI",
|
||||
.hcd_priv_size = sizeof(struct ohci_hcd),
|
||||
|
||||
/*
|
||||
* generic hardware linkage
|
||||
*/
|
||||
.irq = ohci_irq,
|
||||
.flags = HCD_USB11 | HCD_MEMORY,
|
||||
|
||||
/*
|
||||
* basic lifecycle operations
|
||||
*/
|
||||
.start = ohci_at91_start,
|
||||
.stop = ohci_stop,
|
||||
|
||||
/*
|
||||
* managing i/o requests and associated device resources
|
||||
*/
|
||||
.urb_enqueue = ohci_urb_enqueue,
|
||||
.urb_dequeue = ohci_urb_dequeue,
|
||||
.endpoint_disable = ohci_endpoint_disable,
|
||||
|
||||
/*
|
||||
* scheduling support
|
||||
*/
|
||||
.get_frame_number = ohci_get_frame,
|
||||
|
||||
/*
|
||||
* root hub support
|
||||
*/
|
||||
.hub_status_data = ohci_hub_status_data,
|
||||
.hub_control = ohci_hub_control,
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
.hub_suspend = ohci_hub_suspend,
|
||||
.hub_resume = ohci_hub_resume,
|
||||
#endif
|
||||
.start_port_reset = ohci_start_port_reset,
|
||||
};
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
static int ohci_hcd_at91_drv_probe(struct platform_device *dev)
|
||||
{
|
||||
return usb_hcd_at91_probe(&ohci_at91_hc_driver, dev);
|
||||
}
|
||||
|
||||
static int ohci_hcd_at91_drv_remove(struct platform_device *dev)
|
||||
{
|
||||
return usb_hcd_at91_remove(platform_get_drvdata(dev), dev);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int ohci_hcd_at91_drv_suspend(struct platform_device *dev, u32 state, u32 level)
|
||||
{
|
||||
printk("%s(%s:%d): not implemented yet\n",
|
||||
__func__, __FILE__, __LINE__);
|
||||
|
||||
clk_disable(fclk);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ohci_hcd_at91_drv_resume(struct platform_device *dev, u32 state)
|
||||
{
|
||||
printk("%s(%s:%d): not implemented yet\n",
|
||||
__func__, __FILE__, __LINE__);
|
||||
|
||||
clk_enable(fclk);
|
||||
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
#define ohci_hcd_at91_drv_suspend NULL
|
||||
#define ohci_hcd_at91_drv_resume NULL
|
||||
#endif
|
||||
|
||||
static struct platform_driver ohci_hcd_at91_driver = {
|
||||
.probe = ohci_hcd_at91_drv_probe,
|
||||
.remove = ohci_hcd_at91_drv_remove,
|
||||
.suspend = ohci_hcd_at91_drv_suspend,
|
||||
.resume = ohci_hcd_at91_drv_resume,
|
||||
.driver = {
|
||||
.name = "at91rm9200-ohci",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
};
|
||||
|
||||
static int __init ohci_hcd_at91_init (void)
|
||||
{
|
||||
if (usb_disabled())
|
||||
return -ENODEV;
|
||||
|
||||
return platform_driver_register(&ohci_hcd_at91_driver);
|
||||
}
|
||||
|
||||
static void __exit ohci_hcd_at91_cleanup (void)
|
||||
{
|
||||
platform_driver_unregister(&ohci_hcd_at91_driver);
|
||||
}
|
||||
|
||||
module_init (ohci_hcd_at91_init);
|
||||
module_exit (ohci_hcd_at91_cleanup);
|
||||
|
|
@ -905,6 +905,10 @@ MODULE_LICENSE ("GPL");
|
|||
#include "ohci-ppc-soc.c"
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_ARCH_AT91RM9200
|
||||
#include "ohci-at91.c"
|
||||
#endif
|
||||
|
||||
#if !(defined(CONFIG_PCI) \
|
||||
|| defined(CONFIG_SA1111) \
|
||||
|| defined(CONFIG_ARCH_S3C2410) \
|
||||
|
|
@ -913,6 +917,7 @@ MODULE_LICENSE ("GPL");
|
|||
|| defined (CONFIG_PXA27x) \
|
||||
|| defined (CONFIG_SOC_AU1X00) \
|
||||
|| defined (CONFIG_USB_OHCI_HCD_PPC_SOC) \
|
||||
|| defined (CONFIG_ARCH_AT91RM9200) \
|
||||
)
|
||||
#error "missing bus glue for ohci-hcd"
|
||||
#endif
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче