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![Grant Likely](/assets/img/avatar_default.png)
of_device is just an alias for platform_device, so remove it entirely. Also replace to_of_device() with to_platform_device() and update comment blocks. This patch was initially generated from the following semantic patch, and then edited by hand to pick up the bits that coccinelle didn't catch. @@ @@ -struct of_device +struct platform_device Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: David S. Miller <davem@davemloft.net>
299 lines
7.9 KiB
C
299 lines
7.9 KiB
C
/*
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* EHCI HCD (Host Controller Driver) for USB.
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*
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* Bus Glue for Xilinx EHCI core on the of_platform bus
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*
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* Copyright (c) 2009 Xilinx, Inc.
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*
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* Based on "ehci-ppc-of.c" by Valentine Barshak <vbarshak@ru.mvista.com>
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* and "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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*/
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#include <linux/signal.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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/**
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* ehci_xilinx_of_setup - Initialize the device for ehci_reset()
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* @hcd: Pointer to the usb_hcd device to which the host controller bound
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*
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* called during probe() after chip reset completes.
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*/
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static int ehci_xilinx_of_setup(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;
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retval = ehci_halt(ehci);
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if (retval)
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return retval;
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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->sbrn = 0x20;
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return ehci_reset(ehci);
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}
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/**
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* ehci_xilinx_port_handed_over - hand the port out if failed to enable it
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* @hcd: Pointer to the usb_hcd device to which the host controller bound
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* @portnum:Port number to which the device is attached.
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*
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* This function is used as a place to tell the user that the Xilinx USB host
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* controller does support LS devices. And in an HS only configuration, it
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* does not support FS devices either. It is hoped that this can help a
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* confused user.
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*
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* There are cases when the host controller fails to enable the port due to,
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* for example, insufficient power that can be supplied to the device from
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* the USB bus. In those cases, the messages printed here are not helpful.
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*/
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static int ehci_xilinx_port_handed_over(struct usb_hcd *hcd, int portnum)
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{
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dev_warn(hcd->self.controller, "port %d cannot be enabled\n", portnum);
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if (hcd->has_tt) {
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dev_warn(hcd->self.controller,
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"Maybe you have connected a low speed device?\n");
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dev_warn(hcd->self.controller,
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"We do not support low speed devices\n");
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} else {
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dev_warn(hcd->self.controller,
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"Maybe your device is not a high speed device?\n");
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dev_warn(hcd->self.controller,
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"The USB host controller does not support full speed "
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"nor low speed devices\n");
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dev_warn(hcd->self.controller,
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"You can reconfigure the host controller to have "
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"full speed support\n");
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}
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return 0;
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}
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static const struct hc_driver ehci_xilinx_of_hc_driver = {
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.description = hcd_name,
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.product_desc = "OF 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_xilinx_of_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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/*
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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 = NULL,
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.port_handed_over = ehci_xilinx_port_handed_over,
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.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
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};
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/**
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* ehci_hcd_xilinx_of_probe - Probe method for the USB host controller
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* @op: pointer to the platform_device bound to the host controller
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* @match: pointer to of_device_id structure, not used
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*
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* This function requests resources and sets up appropriate properties for the
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* host controller. Because the Xilinx USB host controller can be configured
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* as HS only or HS/FS only, it checks the configuration in the device tree
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* entry, and sets an appropriate value for hcd->has_tt.
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*/
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static int __devinit
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ehci_hcd_xilinx_of_probe(struct platform_device *op, const struct of_device_id *match)
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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;
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struct resource res;
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int irq;
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int rv;
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int *value;
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if (usb_disabled())
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return -ENODEV;
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dev_dbg(&op->dev, "initializing XILINX-OF 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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hcd = usb_create_hcd(&ehci_xilinx_of_hc_driver, &op->dev,
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"XILINX-OF 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 = res.end - res.start + 1;
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if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
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printk(KERN_ERR "%s: request_mem_region failed\n", __FILE__);
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rv = -EBUSY;
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goto err_rmr;
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}
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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 = ioremap(hcd->rsrc_start, hcd->rsrc_len);
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if (!hcd->regs) {
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printk(KERN_ERR "%s: ioremap failed\n", __FILE__);
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rv = -ENOMEM;
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goto err_ioremap;
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}
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ehci = hcd_to_ehci(hcd);
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/* This core always has big-endian register interface and uses
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* big-endian memory descriptors.
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*/
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ehci->big_endian_mmio = 1;
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ehci->big_endian_desc = 1;
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/* Check whether the FS support option is selected in the hardware.
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*/
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value = (int *)of_get_property(dn, "xlnx,support-usb-fs", NULL);
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if (value && (*value == 1)) {
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ehci_dbg(ehci, "USB host controller supports FS devices\n");
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hcd->has_tt = 1;
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} else {
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ehci_dbg(ehci,
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"USB host controller is HS only\n");
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hcd->has_tt = 0;
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}
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/* Debug registers are at the first 0x100 region
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*/
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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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/* cache this readonly data; minimize chip reads */
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ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
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rv = usb_add_hcd(hcd, irq, 0);
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if (rv == 0)
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return 0;
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iounmap(hcd->regs);
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err_ioremap:
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err_irq:
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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err_rmr:
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usb_put_hcd(hcd);
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return rv;
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}
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/**
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* ehci_hcd_xilinx_of_remove - shutdown hcd and release resources
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* @op: pointer to platform_device structure that is to be removed
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*
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* Remove the hcd structure, and release resources that has been requested
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* during probe.
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*/
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static int ehci_hcd_xilinx_of_remove(struct platform_device *op)
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{
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struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
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dev_set_drvdata(&op->dev, NULL);
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dev_dbg(&op->dev, "stopping XILINX-OF USB Controller\n");
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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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/**
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* ehci_hcd_xilinx_of_shutdown - shutdown the hcd
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* @op: pointer to platform_device structure that is to be removed
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*
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* Properly shutdown the hcd, call driver's shutdown routine.
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*/
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static int ehci_hcd_xilinx_of_shutdown(struct platform_device *op)
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{
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struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
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if (hcd->driver->shutdown)
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hcd->driver->shutdown(hcd);
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return 0;
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}
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static const struct of_device_id ehci_hcd_xilinx_of_match[] = {
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{.compatible = "xlnx,xps-usb-host-1.00.a",},
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{},
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};
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MODULE_DEVICE_TABLE(of, ehci_hcd_xilinx_of_match);
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static struct of_platform_driver ehci_hcd_xilinx_of_driver = {
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.probe = ehci_hcd_xilinx_of_probe,
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.remove = ehci_hcd_xilinx_of_remove,
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.shutdown = ehci_hcd_xilinx_of_shutdown,
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.driver = {
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.name = "xilinx-of-ehci",
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.owner = THIS_MODULE,
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.of_match_table = ehci_hcd_xilinx_of_match,
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},
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};
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