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3b8d7321ed
This reverts commit 428aac8a81.
This isn't quite ready for 3.12, we need some more EHCI driver changes
that are just now showing up. So revert this for now, and queue it up
later for 3.13.
Reported-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
192 lines
4.4 KiB
C
192 lines
4.4 KiB
C
/*
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* Driver for Aeroflex Gaisler GRLIB GRUSBHC EHCI host controller
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*
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* GRUSBHC is typically found on LEON/GRLIB SoCs
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*
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* (c) Jan Andersson <jan@gaisler.com>
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*
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* Based on ehci-ppc-of.c which is:
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* (c) Valentine Barshak <vbarshak@ru.mvista.com>
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* and in turn based on "ehci-ppc-soc.c" by Stefan Roese <sr@denx.de>
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* and "ohci-ppc-of.c" by Sylvain Munaut <tnt@246tNt.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/err.h>
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#include <linux/signal.h>
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#include <linux/of_irq.h>
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#include <linux/of_address.h>
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#include <linux/of_platform.h>
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#define GRUSBHC_HCIVERSION 0x0100 /* Known value of cap. reg. HCIVERSION */
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static const struct hc_driver ehci_grlib_hc_driver = {
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.description = hcd_name,
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.product_desc = "GRLIB GRUSBHC EHCI",
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.hcd_priv_size = sizeof(struct ehci_hcd),
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/*
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* generic hardware linkage
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*/
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.irq = ehci_irq,
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.flags = HCD_MEMORY | HCD_USB2,
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/*
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* basic lifecycle operations
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*/
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.reset = ehci_setup,
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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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/*
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* managing i/o requests and associated device resources
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*/
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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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.endpoint_reset = ehci_endpoint_reset,
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/*
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* scheduling support
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*/
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.get_frame_number = ehci_get_frame,
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/*
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* root hub support
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*/
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.hub_status_data = ehci_hub_status_data,
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.hub_control = ehci_hub_control,
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#ifdef 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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.relinquish_port = ehci_relinquish_port,
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.port_handed_over = ehci_port_handed_over,
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.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
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};
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static int ehci_hcd_grlib_probe(struct platform_device *op)
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{
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struct device_node *dn = op->dev.of_node;
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struct usb_hcd *hcd;
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struct ehci_hcd *ehci = NULL;
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struct resource res;
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u32 hc_capbase;
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int irq;
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int rv;
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if (usb_disabled())
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return -ENODEV;
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dev_dbg(&op->dev, "initializing GRUSBHC EHCI USB Controller\n");
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rv = of_address_to_resource(dn, 0, &res);
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if (rv)
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return rv;
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/* usb_create_hcd requires dma_mask != NULL */
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op->dev.dma_mask = &op->dev.coherent_dma_mask;
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hcd = usb_create_hcd(&ehci_grlib_hc_driver, &op->dev,
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"GRUSBHC EHCI USB");
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if (!hcd)
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return -ENOMEM;
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hcd->rsrc_start = res.start;
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hcd->rsrc_len = resource_size(&res);
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irq = irq_of_parse_and_map(dn, 0);
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if (irq == NO_IRQ) {
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printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
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rv = -EBUSY;
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goto err_irq;
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}
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hcd->regs = devm_ioremap_resource(&op->dev, &res);
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if (IS_ERR(hcd->regs)) {
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rv = PTR_ERR(hcd->regs);
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goto err_ioremap;
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}
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ehci = hcd_to_ehci(hcd);
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ehci->caps = hcd->regs;
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/* determine endianness of this implementation */
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hc_capbase = ehci_readl(ehci, &ehci->caps->hc_capbase);
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if (HC_VERSION(ehci, hc_capbase) != GRUSBHC_HCIVERSION) {
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ehci->big_endian_mmio = 1;
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ehci->big_endian_desc = 1;
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ehci->big_endian_capbase = 1;
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}
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rv = usb_add_hcd(hcd, irq, 0);
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if (rv)
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goto err_ioremap;
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return 0;
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err_ioremap:
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irq_dispose_mapping(irq);
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err_irq:
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usb_put_hcd(hcd);
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return rv;
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}
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static int ehci_hcd_grlib_remove(struct platform_device *op)
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{
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struct usb_hcd *hcd = platform_get_drvdata(op);
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dev_dbg(&op->dev, "stopping GRLIB GRUSBHC EHCI USB Controller\n");
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usb_remove_hcd(hcd);
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irq_dispose_mapping(hcd->irq);
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usb_put_hcd(hcd);
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return 0;
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}
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static const struct of_device_id ehci_hcd_grlib_of_match[] = {
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{
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.name = "GAISLER_EHCI",
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},
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{
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.name = "01_026",
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, ehci_hcd_grlib_of_match);
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static struct platform_driver ehci_grlib_driver = {
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.probe = ehci_hcd_grlib_probe,
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.remove = ehci_hcd_grlib_remove,
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.shutdown = usb_hcd_platform_shutdown,
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.driver = {
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.name = "grlib-ehci",
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.owner = THIS_MODULE,
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.of_match_table = ehci_hcd_grlib_of_match,
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},
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};
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