target/linux/generic/patches-3.3/081-USB-OHCI-Add-a-generic-platform-device-driver.patch

   1 --- a/drivers/usb/host/Kconfig
   2 +++ b/drivers/usb/host/Kconfig
   3 @@ -393,6 +393,16 @@ config USB_CNS3XXX_OHCI
   4           Enable support for the CNS3XXX SOC's on-chip OHCI controller.
   5           It is needed for low-speed USB 1.0 device support.
   6
   7 +config USB_OHCI_HCD_PLATFORM
   8 +       bool "Generic OHCI driver for a platform device"
   9 +       depends on USB_OHCI_HCD && EXPERIMENTAL
  10 +       default n
  11 +       ---help---
  12 +         Adds an OHCI host driver for a generic platform device, which
  13 +         provieds a memory space and an irq.
  14 +
  15 +         If unsure, say N.
  16 +
  17  config USB_OHCI_BIG_ENDIAN_DESC
  18         bool
  19         depends on USB_OHCI_HCD
  20 --- a/drivers/usb/host/ohci-hcd.c
  21 +++ b/drivers/usb/host/ohci-hcd.c
  22 @@ -1121,6 +1121,11 @@ MODULE_LICENSE ("GPL");
  23  #define PLATFORM_DRIVER                ohci_xls_driver
  24  #endif
  25
  26 +#ifdef CONFIG_USB_OHCI_HCD_PLATFORM
  27 +#include "ohci-platform.c"
  28 +#define PLATFORM_DRIVER                ohci_platform_driver
  29 +#endif
  30 +
  31  #if    !defined(PCI_DRIVER) &&         \
  32         !defined(PLATFORM_DRIVER) &&    \
  33         !defined(OMAP1_PLATFORM_DRIVER) &&      \
  34 --- /dev/null
  35 +++ b/drivers/usb/host/ohci-platform.c
  36 @@ -0,0 +1,194 @@
  37 +/*
  38 + * Generic platform ohci driver
  39 + *
  40 + * Copyright 2007 Michael Buesch <m@bues.ch>
  41 + * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
  42 + *
  43 + * Derived from the OCHI-SSB driver
  44 + * Derived from the OHCI-PCI driver
  45 + * Copyright 1999 Roman Weissgaerber
  46 + * Copyright 2000-2002 David Brownell
  47 + * Copyright 1999 Linus Torvalds
  48 + * Copyright 1999 Gregory P. Smith
  49 + *
  50 + * Licensed under the GNU/GPL. See COPYING for details.
  51 + */
  52 +#include <linux/platform_device.h>
  53 +#include <linux/usb/ohci_pdriver.h>
  54 +
  55 +static int ohci_platform_reset(struct usb_hcd *hcd)
  56 +{
  57 +       struct platform_device *pdev = to_platform_device(hcd->self.controller);
  58 +       struct usb_ohci_pdata *pdata = pdev->dev.platform_data;
  59 +       struct ohci_hcd *ohci = hcd_to_ohci(hcd);
  60 +       int err;
  61 +
  62 +       if (pdata->big_endian_desc)
  63 +               ohci->flags |= OHCI_QUIRK_BE_DESC;
  64 +       if (pdata->big_endian_mmio)
  65 +               ohci->flags |= OHCI_QUIRK_BE_MMIO;
  66 +       if (pdata->no_big_frame_no)
  67 +               ohci->flags |= OHCI_QUIRK_FRAME_NO;
  68 +
  69 +       ohci_hcd_init(ohci);
  70 +       err = ohci_init(ohci);
  71 +
  72 +       return err;
  73 +}
  74 +
  75 +static int ohci_platform_start(struct usb_hcd *hcd)
  76 +{
  77 +       struct ohci_hcd *ohci = hcd_to_ohci(hcd);
  78 +       int err;
  79 +
  80 +       err = ohci_run(ohci);
  81 +       if (err < 0) {
  82 +               ohci_err(ohci, "can't start\n");
  83 +               ohci_stop(hcd);
  84 +       }
  85 +
  86 +       return err;
  87 +}
  88 +
  89 +static const struct hc_driver ohci_platform_hc_driver = {
  90 +       .description            = hcd_name,
  91 +       .product_desc           = "Generic Platform OHCI Controller",
  92 +       .hcd_priv_size          = sizeof(struct ohci_hcd),
  93 +
  94 +       .irq                    = ohci_irq,
  95 +       .flags                  = HCD_MEMORY | HCD_USB11,
  96 +
  97 +       .reset                  = ohci_platform_reset,
  98 +       .start                  = ohci_platform_start,
  99 +       .stop                   = ohci_stop,
 100 +       .shutdown               = ohci_shutdown,
 101 +
 102 +       .urb_enqueue            = ohci_urb_enqueue,
 103 +       .urb_dequeue            = ohci_urb_dequeue,
 104 +       .endpoint_disable       = ohci_endpoint_disable,
 105 +
 106 +       .get_frame_number       = ohci_get_frame,
 107 +
 108 +       .hub_status_data        = ohci_hub_status_data,
 109 +       .hub_control            = ohci_hub_control,
 110 +#ifdef CONFIG_PM
 111 +       .bus_suspend            = ohci_bus_suspend,
 112 +       .bus_resume             = ohci_bus_resume,
 113 +#endif
 114 +
 115 +       .start_port_reset       = ohci_start_port_reset,
 116 +};
 117 +
 118 +static int __devinit ohci_platform_probe(struct platform_device *dev)
 119 +{
 120 +       struct usb_hcd *hcd;
 121 +       struct resource *res_mem;
 122 +       int irq;
 123 +       int err = -ENOMEM;
 124 +
 125 +       BUG_ON(!dev->dev.platform_data);
 126 +
 127 +       if (usb_disabled())
 128 +               return -ENODEV;
 129 +
 130 +       irq = platform_get_irq(dev, 0);
 131 +       if (irq < 0) {
 132 +               pr_err("no irq provieded");
 133 +               return irq;
 134 +       }
 135 +
 136 +       res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
 137 +       if (!res_mem) {
 138 +               pr_err("no memory recourse provieded");
 139 +               return -ENXIO;
 140 +       }
 141 +
 142 +       hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
 143 +                       dev_name(&dev->dev));
 144 +       if (!hcd)
 145 +               return -ENOMEM;
 146 +
 147 +       hcd->rsrc_start = res_mem->start;
 148 +       hcd->rsrc_len = resource_size(res_mem);
 149 +
 150 +       if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 151 +               pr_err("controller already in use");
 152 +               err = -EBUSY;
 153 +               goto err_put_hcd;
 154 +       }
 155 +
 156 +       hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 157 +       if (!hcd->regs)
 158 +               goto err_release_region;
 159 +       err = usb_add_hcd(hcd, irq, IRQF_SHARED);
 160 +       if (err)
 161 +               goto err_iounmap;
 162 +
 163 +       platform_set_drvdata(dev, hcd);
 164 +
 165 +       return err;
 166 +
 167 +err_iounmap:
 168 +       iounmap(hcd->regs);
 169 +err_release_region:
 170 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 171 +err_put_hcd:
 172 +       usb_put_hcd(hcd);
 173 +       return err;
 174 +}
 175 +
 176 +static int __devexit ohci_platform_remove(struct platform_device *dev)
 177 +{
 178 +       struct usb_hcd *hcd = platform_get_drvdata(dev);
 179 +
 180 +       usb_remove_hcd(hcd);
 181 +       iounmap(hcd->regs);
 182 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 183 +       usb_put_hcd(hcd);
 184 +       platform_set_drvdata(dev, NULL);
 185 +
 186 +       return 0;
 187 +}
 188 +
 189 +#ifdef CONFIG_PM
 190 +
 191 +static int ohci_platform_suspend(struct device *dev)
 192 +{
 193 +       return 0;
 194 +}
 195 +
 196 +static int ohci_platform_resume(struct device *dev)
 197 +{
 198 +       struct usb_hcd *hcd = dev_get_drvdata(dev);
 199 +
 200 +       ohci_finish_controller_resume(hcd);
 201 +       return 0;
 202 +}
 203 +
 204 +#else /* !CONFIG_PM */
 205 +#define ohci_platform_suspend  NULL
 206 +#define ohci_platform_resume   NULL
 207 +#endif /* CONFIG_PM */
 208 +
 209 +static const struct platform_device_id ohci_platform_table[] = {
 210 +       { "ohci-platform", 0 },
 211 +       { }
 212 +};
 213 +MODULE_DEVICE_TABLE(platform, ohci_platform_table);
 214 +
 215 +static const struct dev_pm_ops ohci_platform_pm_ops = {
 216 +       .suspend        = ohci_platform_suspend,
 217 +       .resume         = ohci_platform_resume,
 218 +};
 219 +
 220 +static struct platform_driver ohci_platform_driver = {
 221 +       .id_table       = ohci_platform_table,
 222 +       .probe          = ohci_platform_probe,
 223 +       .remove         = __devexit_p(ohci_platform_remove),
 224 +       .shutdown       = usb_hcd_platform_shutdown,
 225 +       .driver         = {
 226 +               .owner  = THIS_MODULE,
 227 +               .name   = "ohci-platform",
 228 +               .pm     = &ohci_platform_pm_ops,
 229 +       }
 230 +};
 231 --- /dev/null
 232 +++ b/include/linux/usb/ohci_pdriver.h
 233 @@ -0,0 +1,38 @@
 234 +/*
 235 + * Copyright (C) 2012 Hauke Mehrtens <hauke@hauke-m.de>
 236 + *
 237 + * This program is free software; you can redistribute it and/or modify it
 238 + * under the terms of the GNU General Public License as published by the
 239 + * Free Software Foundation; either version 2 of the License, or (at your
 240 + * option) any later version.
 241 + *
 242 + * This program is distributed in the hope that it will be useful, but
 243 + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 244 + * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 245 + * for more details.
 246 + *
 247 + * You should have received a copy of the GNU General Public License
 248 + * along with this program; if not, write to the Free Software Foundation,
 249 + * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 250 + */
 251 +
 252 +#ifndef __USB_CORE_OHCI_PDRIVER_H
 253 +#define __USB_CORE_OHCI_PDRIVER_H
 254 +
 255 +/**
 256 + * struct usb_ohci_pdata - platform_data for generic ohci driver
 257 + *
 258 + * @big_endian_desc:   BE descriptors
 259 + * @big_endian_mmio:   BE registers
 260 + * @no_big_frame_no:   no big endian frame_no shift
 261 + *
 262 + * These are general configuration options for the OHCI controller. All of
 263 + * these options are activating more or less workarounds for some hardware.
 264 + */
 265 +struct usb_ohci_pdata {
 266 +       unsigned        big_endian_desc:1;
 267 +       unsigned        big_endian_mmio:1;
 268 +       unsigned        no_big_frame_no:1;
 269 +};
 270 +
 271 +#endif /* __USB_CORE_OHCI_PDRIVER_H */