86081d7be3
Without it udev won't be able to load the driver once it notices the device unbound. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
136 lines
3.4 KiB
C
136 lines
3.4 KiB
C
/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License 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
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/usb/msm_hsusb_hw.h>
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#include <linux/usb/ulpi.h>
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#include "ci13xxx_udc.c"
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#define MSM_USB_BASE (udc->regs)
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static irqreturn_t msm_udc_irq(int irq, void *data)
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{
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return udc_irq();
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}
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static void ci13xxx_msm_notify_event(struct ci13xxx *udc, unsigned event)
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{
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struct device *dev = udc->gadget.dev.parent;
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int val;
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switch (event) {
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case CI13XXX_CONTROLLER_RESET_EVENT:
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dev_dbg(dev, "CI13XXX_CONTROLLER_RESET_EVENT received\n");
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writel(0, USB_AHBBURST);
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writel(0, USB_AHBMODE);
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break;
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case CI13XXX_CONTROLLER_STOPPED_EVENT:
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dev_dbg(dev, "CI13XXX_CONTROLLER_STOPPED_EVENT received\n");
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/*
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* Put the transceiver in non-driving mode. Otherwise host
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* may not detect soft-disconnection.
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*/
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val = otg_io_read(udc->transceiver, ULPI_FUNC_CTRL);
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val &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
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val |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
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otg_io_write(udc->transceiver, val, ULPI_FUNC_CTRL);
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break;
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default:
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dev_dbg(dev, "unknown ci13xxx_udc event\n");
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break;
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}
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}
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static struct ci13xxx_udc_driver ci13xxx_msm_udc_driver = {
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.name = "ci13xxx_msm",
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.flags = CI13XXX_REGS_SHARED |
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CI13XXX_REQUIRE_TRANSCEIVER |
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CI13XXX_PULLUP_ON_VBUS |
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CI13XXX_DISABLE_STREAMING,
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.notify_event = ci13xxx_msm_notify_event,
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};
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static int ci13xxx_msm_probe(struct platform_device *pdev)
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{
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struct resource *res;
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void __iomem *regs;
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int irq;
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int ret;
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dev_dbg(&pdev->dev, "ci13xxx_msm_probe\n");
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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, "failed to get platform resource mem\n");
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return -ENXIO;
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}
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regs = ioremap(res->start, resource_size(res));
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if (!regs) {
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dev_err(&pdev->dev, "ioremap failed\n");
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return -ENOMEM;
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}
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ret = udc_probe(&ci13xxx_msm_udc_driver, &pdev->dev, regs);
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if (ret < 0) {
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dev_err(&pdev->dev, "udc_probe failed\n");
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goto iounmap;
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}
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irq = platform_get_irq(pdev, 0);
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if (irq < 0) {
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dev_err(&pdev->dev, "IRQ not found\n");
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ret = -ENXIO;
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goto udc_remove;
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}
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ret = request_irq(irq, msm_udc_irq, IRQF_SHARED, pdev->name, pdev);
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if (ret < 0) {
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dev_err(&pdev->dev, "request_irq failed\n");
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goto udc_remove;
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}
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pm_runtime_no_callbacks(&pdev->dev);
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pm_runtime_enable(&pdev->dev);
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return 0;
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udc_remove:
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udc_remove();
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iounmap:
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iounmap(regs);
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return ret;
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}
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static struct platform_driver ci13xxx_msm_driver = {
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.probe = ci13xxx_msm_probe,
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.driver = { .name = "msm_hsusb", },
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};
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MODULE_ALIAS("platform:msm_hsusb");
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static int __init ci13xxx_msm_init(void)
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{
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return platform_driver_register(&ci13xxx_msm_driver);
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}
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module_init(ci13xxx_msm_init);
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