linux/drivers/usb/gadget/ci13xxx_msm.c
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   1/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
   2 *
   3 * This program is free software; you can redistribute it and/or modify
   4 * it under the terms of the GNU General Public License version 2 and
   5 * only version 2 as published by the Free Software Foundation.
   6 */
   7
   8#include <linux/module.h>
   9#include <linux/platform_device.h>
  10#include <linux/pm_runtime.h>
  11#include <linux/usb/msm_hsusb_hw.h>
  12#include <linux/usb/ulpi.h>
  13
  14#include "ci13xxx_udc.c"
  15
  16#define MSM_USB_BASE    (udc->regs)
  17
  18static irqreturn_t msm_udc_irq(int irq, void *data)
  19{
  20        return udc_irq();
  21}
  22
  23static void ci13xxx_msm_notify_event(struct ci13xxx *udc, unsigned event)
  24{
  25        struct device *dev = udc->gadget.dev.parent;
  26        int val;
  27
  28        switch (event) {
  29        case CI13XXX_CONTROLLER_RESET_EVENT:
  30                dev_dbg(dev, "CI13XXX_CONTROLLER_RESET_EVENT received\n");
  31                writel(0, USB_AHBBURST);
  32                writel(0, USB_AHBMODE);
  33                break;
  34        case CI13XXX_CONTROLLER_STOPPED_EVENT:
  35                dev_dbg(dev, "CI13XXX_CONTROLLER_STOPPED_EVENT received\n");
  36                /*
  37                 * Put the transceiver in non-driving mode. Otherwise host
  38                 * may not detect soft-disconnection.
  39                 */
  40                val = otg_io_read(udc->transceiver, ULPI_FUNC_CTRL);
  41                val &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
  42                val |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
  43                otg_io_write(udc->transceiver, val, ULPI_FUNC_CTRL);
  44                break;
  45        default:
  46                dev_dbg(dev, "unknown ci13xxx_udc event\n");
  47                break;
  48        }
  49}
  50
  51static struct ci13xxx_udc_driver ci13xxx_msm_udc_driver = {
  52        .name                   = "ci13xxx_msm",
  53        .flags                  = CI13XXX_REGS_SHARED |
  54                                  CI13XXX_REQUIRE_TRANSCEIVER |
  55                                  CI13XXX_PULLUP_ON_VBUS |
  56                                  CI13XXX_DISABLE_STREAMING,
  57
  58        .notify_event           = ci13xxx_msm_notify_event,
  59};
  60
  61static int ci13xxx_msm_probe(struct platform_device *pdev)
  62{
  63        struct resource *res;
  64        void __iomem *regs;
  65        int irq;
  66        int ret;
  67
  68        dev_dbg(&pdev->dev, "ci13xxx_msm_probe\n");
  69
  70        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  71        if (!res) {
  72                dev_err(&pdev->dev, "failed to get platform resource mem\n");
  73                return -ENXIO;
  74        }
  75
  76        regs = ioremap(res->start, resource_size(res));
  77        if (!regs) {
  78                dev_err(&pdev->dev, "ioremap failed\n");
  79                return -ENOMEM;
  80        }
  81
  82        ret = udc_probe(&ci13xxx_msm_udc_driver, &pdev->dev, regs);
  83        if (ret < 0) {
  84                dev_err(&pdev->dev, "udc_probe failed\n");
  85                goto iounmap;
  86        }
  87
  88        irq = platform_get_irq(pdev, 0);
  89        if (irq < 0) {
  90                dev_err(&pdev->dev, "IRQ not found\n");
  91                ret = -ENXIO;
  92                goto udc_remove;
  93        }
  94
  95        ret = request_irq(irq, msm_udc_irq, IRQF_SHARED, pdev->name, pdev);
  96        if (ret < 0) {
  97                dev_err(&pdev->dev, "request_irq failed\n");
  98                goto udc_remove;
  99        }
 100
 101        pm_runtime_no_callbacks(&pdev->dev);
 102        pm_runtime_enable(&pdev->dev);
 103
 104        return 0;
 105
 106udc_remove:
 107        udc_remove();
 108iounmap:
 109        iounmap(regs);
 110
 111        return ret;
 112}
 113
 114static struct platform_driver ci13xxx_msm_driver = {
 115        .probe = ci13xxx_msm_probe,
 116        .driver = { .name = "msm_hsusb", },
 117};
 118MODULE_ALIAS("platform:msm_hsusb");
 119
 120static int __init ci13xxx_msm_init(void)
 121{
 122        return platform_driver_register(&ci13xxx_msm_driver);
 123}
 124module_init(ci13xxx_msm_init);
 125
 126MODULE_LICENSE("GPL v2");
 127