mirror of
https://github.com/torvalds/linux.git
synced 2024-11-23 12:42:02 +00:00
135db0485c
Various minor fixes to some SOC bus glue for EHCI:
- Remove a bogus copyright (by "me"!) which someone added to the FSL
driver, and an irrelevant comment.
- Un-break MODULE_ALIAS() directives after platform_bus hotplugging
acquired a backwards-incompatible change. (Which didn't fix ANY
of the in-tree drivers it prevented from hotplugging -- sigh.)
- Remove some bogus assignments of platform_bus_type; that's done by
the platform_bus code.
- Add some FIXMEs for drivers with that pointless two-level idiom for
probe() and remove() routines. ("Obfuscation" is a non-goal.)
That should help avoid future bus glue which copies that idiom.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
152 lines
3.5 KiB
C
152 lines
3.5 KiB
C
/*
|
|
* IXP4XX EHCI Host Controller Driver
|
|
*
|
|
* Author: Vladimir Barinov <vbarinov@ru.mvista.com>
|
|
*
|
|
* Based on "ehci-fsl.c" by Randy Vinson <rvinson@mvista.com>
|
|
*
|
|
* 2007 (c) MontaVista Software, Inc. This file is licensed under
|
|
* the terms of the GNU General Public License version 2. This program
|
|
* is licensed "as is" without any warranty of any kind, whether express
|
|
* or implied.
|
|
*/
|
|
|
|
#include <linux/platform_device.h>
|
|
|
|
static int ixp4xx_ehci_init(struct usb_hcd *hcd)
|
|
{
|
|
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
|
|
int retval = 0;
|
|
|
|
ehci->big_endian_desc = 1;
|
|
ehci->big_endian_mmio = 1;
|
|
|
|
ehci->caps = hcd->regs + 0x100;
|
|
ehci->regs = hcd->regs + 0x100
|
|
+ HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
|
|
ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
|
|
|
|
ehci->is_tdi_rh_tt = 1;
|
|
ehci_reset(ehci);
|
|
|
|
retval = ehci_init(hcd);
|
|
if (retval)
|
|
return retval;
|
|
|
|
ehci_port_power(ehci, 0);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static const struct hc_driver ixp4xx_ehci_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "IXP4XX EHCI Host Controller",
|
|
.hcd_priv_size = sizeof(struct ehci_hcd),
|
|
.irq = ehci_irq,
|
|
.flags = HCD_MEMORY | HCD_USB2,
|
|
.reset = ixp4xx_ehci_init,
|
|
.start = ehci_run,
|
|
.stop = ehci_stop,
|
|
.shutdown = ehci_shutdown,
|
|
.urb_enqueue = ehci_urb_enqueue,
|
|
.urb_dequeue = ehci_urb_dequeue,
|
|
.endpoint_disable = ehci_endpoint_disable,
|
|
.get_frame_number = ehci_get_frame,
|
|
.hub_status_data = ehci_hub_status_data,
|
|
.hub_control = ehci_hub_control,
|
|
#if defined(CONFIG_PM)
|
|
.bus_suspend = ehci_bus_suspend,
|
|
.bus_resume = ehci_bus_resume,
|
|
#endif
|
|
};
|
|
|
|
static int ixp4xx_ehci_probe(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
const struct hc_driver *driver = &ixp4xx_ehci_hc_driver;
|
|
struct resource *res;
|
|
int irq;
|
|
int retval;
|
|
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
|
if (!res) {
|
|
dev_err(&pdev->dev,
|
|
"Found HC with no IRQ. Check %s setup!\n",
|
|
pdev->dev.bus_id);
|
|
return -ENODEV;
|
|
}
|
|
irq = res->start;
|
|
|
|
hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id);
|
|
if (!hcd) {
|
|
retval = -ENOMEM;
|
|
goto fail_create_hcd;
|
|
}
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res) {
|
|
dev_err(&pdev->dev,
|
|
"Found HC with no register addr. Check %s setup!\n",
|
|
pdev->dev.bus_id);
|
|
retval = -ENODEV;
|
|
goto fail_request_resource;
|
|
}
|
|
hcd->rsrc_start = res->start;
|
|
hcd->rsrc_len = res->end - res->start + 1;
|
|
|
|
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
|
|
driver->description)) {
|
|
dev_dbg(&pdev->dev, "controller already in use\n");
|
|
retval = -EBUSY;
|
|
goto fail_request_resource;
|
|
}
|
|
|
|
hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
|
|
if (hcd->regs == NULL) {
|
|
dev_dbg(&pdev->dev, "error mapping memory\n");
|
|
retval = -EFAULT;
|
|
goto fail_ioremap;
|
|
}
|
|
|
|
retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
|
|
if (retval)
|
|
goto fail_add_hcd;
|
|
|
|
return retval;
|
|
|
|
fail_add_hcd:
|
|
iounmap(hcd->regs);
|
|
fail_ioremap:
|
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
fail_request_resource:
|
|
usb_put_hcd(hcd);
|
|
fail_create_hcd:
|
|
dev_err(&pdev->dev, "init %s fail, %d\n", pdev->dev.bus_id, retval);
|
|
return retval;
|
|
}
|
|
|
|
static int ixp4xx_ehci_remove(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
|
|
|
usb_remove_hcd(hcd);
|
|
iounmap(hcd->regs);
|
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
usb_put_hcd(hcd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
MODULE_ALIAS("platform:ixp4xx-ehci");
|
|
|
|
static struct platform_driver ixp4xx_ehci_driver = {
|
|
.probe = ixp4xx_ehci_probe,
|
|
.remove = ixp4xx_ehci_remove,
|
|
.driver = {
|
|
.name = "ixp4xx-ehci",
|
|
},
|
|
};
|