drivers/usb/chipidea/ci13xxx_msm.c

   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 #include <linux/usb/gadget.h>
  14 #include <linux/usb/chipidea.h>
  15
  16 #include "ci.h"
  17
  18 #define MSM_USB_BASE    (udc->regs)
  19
  20 static void ci13xxx_msm_notify_event(struct ci13xxx *udc, unsigned event)
  21 {
  22         struct device *dev = udc->gadget.dev.parent;
  23         int val;
  24
  25         switch (event) {
  26         case CI13XXX_CONTROLLER_RESET_EVENT:
  27                 dev_dbg(dev, "CI13XXX_CONTROLLER_RESET_EVENT received\n");
  28                 writel(0, USB_AHBBURST);
  29                 writel(0, USB_AHBMODE);
  30                 break;
  31         case CI13XXX_CONTROLLER_STOPPED_EVENT:
  32                 dev_dbg(dev, "CI13XXX_CONTROLLER_STOPPED_EVENT received\n");
  33                 /*
  34                  * Put the transceiver in non-driving mode. Otherwise host
  35                  * may not detect soft-disconnection.
  36                  */
  37                 val = usb_phy_io_read(udc->transceiver, ULPI_FUNC_CTRL);
  38                 val &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
  39                 val |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
  40                 usb_phy_io_write(udc->transceiver, val, ULPI_FUNC_CTRL);
  41                 break;
  42         default:
  43                 dev_dbg(dev, "unknown ci13xxx_udc event\n");
  44                 break;
  45         }
  46 }
  47
  48 static struct ci13xxx_udc_driver ci13xxx_msm_udc_driver = {
  49         .name                   = "ci13xxx_msm",
  50         .flags                  = CI13XXX_REGS_SHARED |
  51                                   CI13XXX_REQUIRE_TRANSCEIVER |
  52                                   CI13XXX_PULLUP_ON_VBUS |
  53                                   CI13XXX_DISABLE_STREAMING,
  54
  55         .notify_event           = ci13xxx_msm_notify_event,
  56 };
  57
  58 static int ci13xxx_msm_probe(struct platform_device *pdev)
  59 {
  60         struct platform_device *plat_ci;
  61         int ret;
  62
  63         dev_dbg(&pdev->dev, "ci13xxx_msm_probe\n");
  64
  65         plat_ci = platform_device_alloc("ci_udc", -1);
  66         if (!plat_ci) {
  67                 dev_err(&pdev->dev, "can't allocate ci_udc platform device\n");
  68                 return -ENOMEM;
  69         }
  70
  71         ret = platform_device_add_resources(plat_ci, pdev->resource,
  72                                             pdev->num_resources);
  73         if (ret) {
  74                 dev_err(&pdev->dev, "can't add resources to platform device\n");
  75                 goto put_platform;
  76         }
  77
  78         ret = platform_device_add_data(plat_ci, &ci13xxx_msm_udc_driver,
  79                                        sizeof(ci13xxx_msm_udc_driver));
  80         if (ret)
  81                 goto put_platform;
  82
  83         ret = platform_device_add(plat_ci);
  84         if (ret)
  85                 goto put_platform;
  86
  87         pm_runtime_no_callbacks(&pdev->dev);
  88         pm_runtime_enable(&pdev->dev);
  89
  90         return 0;
  91
  92 put_platform:
  93         platform_device_put(plat_ci);
  94
  95         return ret;
  96 }
  97
  98 static struct platform_driver ci13xxx_msm_driver = {
  99         .probe = ci13xxx_msm_probe,
 100         .driver = { .name = "msm_hsusb", },
 101 };
 102 MODULE_ALIAS("platform:msm_hsusb");
 103
 104 static int __init ci13xxx_msm_init(void)
 105 {
 106         return platform_driver_register(&ci13xxx_msm_driver);
 107 }
 108 module_init(ci13xxx_msm_init);
 109
 110 MODULE_LICENSE("GPL v2");