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>
151 lines
3.5 KiB
C
151 lines
3.5 KiB
C
/*
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* IXP4XX EHCI Host Controller Driver
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*
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* Author: Vladimir Barinov <vbarinov@ru.mvista.com>
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*
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* Based on "ehci-fsl.c" by Randy Vinson <rvinson@mvista.com>
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*
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* 2007 (c) MontaVista Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*/
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#include <linux/platform_device.h>
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static int ixp4xx_ehci_init(struct usb_hcd *hcd)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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int retval = 0;
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ehci->big_endian_desc = 1;
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ehci->big_endian_mmio = 1;
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ehci->caps = hcd->regs + 0x100;
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ehci->regs = hcd->regs + 0x100
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+ HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
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ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
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ehci->is_tdi_rh_tt = 1;
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ehci_reset(ehci);
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retval = ehci_init(hcd);
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if (retval)
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return retval;
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ehci_port_power(ehci, 0);
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return retval;
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}
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static const struct hc_driver ixp4xx_ehci_hc_driver = {
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.description = hcd_name,
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.product_desc = "IXP4XX EHCI Host Controller",
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.hcd_priv_size = sizeof(struct ehci_hcd),
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.irq = ehci_irq,
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.flags = HCD_MEMORY | HCD_USB2,
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.reset = ixp4xx_ehci_init,
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.start = ehci_run,
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.stop = ehci_stop,
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.shutdown = ehci_shutdown,
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.urb_enqueue = ehci_urb_enqueue,
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.urb_dequeue = ehci_urb_dequeue,
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.endpoint_disable = ehci_endpoint_disable,
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.get_frame_number = ehci_get_frame,
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.hub_status_data = ehci_hub_status_data,
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.hub_control = ehci_hub_control,
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#if defined(CONFIG_PM)
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.bus_suspend = ehci_bus_suspend,
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.bus_resume = ehci_bus_resume,
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#endif
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};
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static int ixp4xx_ehci_probe(struct platform_device *pdev)
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{
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struct usb_hcd *hcd;
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const struct hc_driver *driver = &ixp4xx_ehci_hc_driver;
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struct resource *res;
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int irq;
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int retval;
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if (usb_disabled())
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return -ENODEV;
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res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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if (!res) {
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dev_err(&pdev->dev,
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"Found HC with no IRQ. Check %s setup!\n",
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pdev->dev.bus_id);
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return -ENODEV;
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}
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irq = res->start;
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hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id);
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if (!hcd) {
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retval = -ENOMEM;
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goto fail_create_hcd;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(&pdev->dev,
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"Found HC with no register addr. Check %s setup!\n",
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pdev->dev.bus_id);
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retval = -ENODEV;
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goto fail_request_resource;
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}
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hcd->rsrc_start = res->start;
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hcd->rsrc_len = res->end - res->start + 1;
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if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
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driver->description)) {
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dev_dbg(&pdev->dev, "controller already in use\n");
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retval = -EBUSY;
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goto fail_request_resource;
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}
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hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
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if (hcd->regs == NULL) {
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dev_dbg(&pdev->dev, "error mapping memory\n");
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retval = -EFAULT;
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goto fail_ioremap;
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}
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retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
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if (retval)
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goto fail_add_hcd;
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return retval;
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fail_add_hcd:
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iounmap(hcd->regs);
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fail_ioremap:
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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fail_request_resource:
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usb_put_hcd(hcd);
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fail_create_hcd:
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dev_err(&pdev->dev, "init %s fail, %d\n", pdev->dev.bus_id, retval);
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return retval;
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}
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static int ixp4xx_ehci_remove(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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usb_remove_hcd(hcd);
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iounmap(hcd->regs);
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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usb_put_hcd(hcd);
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return 0;
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}
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MODULE_ALIAS("platform:ixp4xx-ehci");
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static struct platform_driver ixp4xx_ehci_driver = {
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.probe = ixp4xx_ehci_probe,
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.remove = ixp4xx_ehci_remove,
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.driver = {
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.name = "ixp4xx-ehci",
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},
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};
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