target/linux/ar71xx/patches-3.3/001-USB-EHCI-Add-a-generic-platform-device-driver.patch

   1 From 4fa3face95f1ca2e396dd59324a6c6ef01df24cc Mon Sep 17 00:00:00 2001
   2 From: Hauke Mehrtens <hauke@hauke-m.de>
   3 Date: Tue, 13 Mar 2012 01:04:48 +0100
   4 Subject: [PATCH 02/47] USB: EHCI: Add a generic platform device driver
   5
   6 This adds a generic driver for platform devices. It works like the PCI
   7 driver and is based on it. This is for devices which do not have an own
   8 bus but their EHCI controller works like a PCI controller. It will be
   9 used for the Broadcom bcma and ssb USB EHCI controller.
  10
  11 Acked-by: Alan Stern <stern@rowland.harvard.edu>
  12 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  13 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  14 ---
  15  drivers/usb/host/Kconfig         |   10 ++
  16  drivers/usb/host/ehci-hcd.c      |    5 +
  17  drivers/usb/host/ehci-platform.c |  198 ++++++++++++++++++++++++++++++++++++++
  18  include/linux/usb/ehci_pdriver.h |   46 +++++++++
  19  4 files changed, 259 insertions(+), 0 deletions(-)
  20  create mode 100644 drivers/usb/host/ehci-platform.c
  21  create mode 100644 include/linux/usb/ehci_pdriver.h
  22
  23 --- a/drivers/usb/host/Kconfig
  24 +++ b/drivers/usb/host/Kconfig
  25 @@ -403,6 +403,16 @@ config USB_OHCI_HCD_PLATFORM
  26
  27           If unsure, say N.
  28
  29 +config USB_EHCI_HCD_PLATFORM
  30 +       bool "Generic EHCI driver for a platform device"
  31 +       depends on USB_EHCI_HCD && EXPERIMENTAL
  32 +       default n
  33 +       ---help---
  34 +         Adds an EHCI host driver for a generic platform device, which
  35 +         provieds a memory space and an irq.
  36 +
  37 +         If unsure, say N.
  38 +
  39  config USB_OHCI_BIG_ENDIAN_DESC
  40         bool
  41         depends on USB_OHCI_HCD
  42 --- a/drivers/usb/host/ehci-hcd.c
  43 +++ b/drivers/usb/host/ehci-hcd.c
  44 @@ -1381,6 +1381,11 @@ MODULE_LICENSE ("GPL");
  45  #define        PLATFORM_DRIVER         ehci_mv_driver
  46  #endif
  47
  48 +#ifdef CONFIG_USB_EHCI_HCD_PLATFORM
  49 +#include "ehci-platform.c"
  50 +#define PLATFORM_DRIVER                ehci_platform_driver
  51 +#endif
  52 +
  53  #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
  54      !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
  55      !defined(XILINX_OF_PLATFORM_DRIVER)
  56 --- /dev/null
  57 +++ b/drivers/usb/host/ehci-platform.c
  58 @@ -0,0 +1,198 @@
  59 +/*
  60 + * Generic platform ehci driver
  61 + *
  62 + * Copyright 2007 Steven Brown <sbrown@cortland.com>
  63 + * Copyright 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
  64 + *
  65 + * Derived from the ohci-ssb driver
  66 + * Copyright 2007 Michael Buesch <m@bues.ch>
  67 + *
  68 + * Derived from the EHCI-PCI driver
  69 + * Copyright (c) 2000-2004 by David Brownell
  70 + *
  71 + * Derived from the ohci-pci driver
  72 + * Copyright 1999 Roman Weissgaerber
  73 + * Copyright 2000-2002 David Brownell
  74 + * Copyright 1999 Linus Torvalds
  75 + * Copyright 1999 Gregory P. Smith
  76 + *
  77 + * Licensed under the GNU/GPL. See COPYING for details.
  78 + */
  79 +#include <linux/platform_device.h>
  80 +#include <linux/usb/ehci_pdriver.h>
  81 +
  82 +static int ehci_platform_reset(struct usb_hcd *hcd)
  83 +{
  84 +       struct platform_device *pdev = to_platform_device(hcd->self.controller);
  85 +       struct usb_ehci_pdata *pdata = pdev->dev.platform_data;
  86 +       struct ehci_hcd *ehci = hcd_to_ehci(hcd);
  87 +       int retval;
  88 +
  89 +       hcd->has_tt = pdata->has_tt;
  90 +       ehci->has_synopsys_hc_bug = pdata->has_synopsys_hc_bug;
  91 +       ehci->big_endian_desc = pdata->big_endian_desc;
  92 +       ehci->big_endian_mmio = pdata->big_endian_mmio;
  93 +
  94 +       ehci->caps = hcd->regs + pdata->caps_offset;
  95 +       retval = ehci_setup(hcd);
  96 +       if (retval)
  97 +               return retval;
  98 +
  99 +       if (pdata->port_power_on)
 100 +               ehci_port_power(ehci, 1);
 101 +       if (pdata->port_power_off)
 102 +               ehci_port_power(ehci, 0);
 103 +
 104 +       return 0;
 105 +}
 106 +
 107 +static const struct hc_driver ehci_platform_hc_driver = {
 108 +       .description            = hcd_name,
 109 +       .product_desc           = "Generic Platform EHCI Controller",
 110 +       .hcd_priv_size          = sizeof(struct ehci_hcd),
 111 +
 112 +       .irq                    = ehci_irq,
 113 +       .flags                  = HCD_MEMORY | HCD_USB2,
 114 +
 115 +       .reset                  = ehci_platform_reset,
 116 +       .start                  = ehci_run,
 117 +       .stop                   = ehci_stop,
 118 +       .shutdown               = ehci_shutdown,
 119 +
 120 +       .urb_enqueue            = ehci_urb_enqueue,
 121 +       .urb_dequeue            = ehci_urb_dequeue,
 122 +       .endpoint_disable       = ehci_endpoint_disable,
 123 +       .endpoint_reset         = ehci_endpoint_reset,
 124 +
 125 +       .get_frame_number       = ehci_get_frame,
 126 +
 127 +       .hub_status_data        = ehci_hub_status_data,
 128 +       .hub_control            = ehci_hub_control,
 129 +#if defined(CONFIG_PM)
 130 +       .bus_suspend            = ehci_bus_suspend,
 131 +       .bus_resume             = ehci_bus_resume,
 132 +#endif
 133 +       .relinquish_port        = ehci_relinquish_port,
 134 +       .port_handed_over       = ehci_port_handed_over,
 135 +
 136 +       .update_device          = ehci_update_device,
 137 +
 138 +       .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
 139 +};
 140 +
 141 +static int __devinit ehci_platform_probe(struct platform_device *dev)
 142 +{
 143 +       struct usb_hcd *hcd;
 144 +       struct resource *res_mem;
 145 +       int irq;
 146 +       int err = -ENOMEM;
 147 +
 148 +       BUG_ON(!dev->dev.platform_data);
 149 +
 150 +       if (usb_disabled())
 151 +               return -ENODEV;
 152 +
 153 +       irq = platform_get_irq(dev, 0);
 154 +       if (irq < 0) {
 155 +               pr_err("no irq provieded");
 156 +               return irq;
 157 +       }
 158 +       res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
 159 +       if (!res_mem) {
 160 +               pr_err("no memory recourse provieded");
 161 +               return -ENXIO;
 162 +       }
 163 +
 164 +       hcd = usb_create_hcd(&ehci_platform_hc_driver, &dev->dev,
 165 +                            dev_name(&dev->dev));
 166 +       if (!hcd)
 167 +               return -ENOMEM;
 168 +
 169 +       hcd->rsrc_start = res_mem->start;
 170 +       hcd->rsrc_len = resource_size(res_mem);
 171 +
 172 +       if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 173 +               pr_err("controller already in use");
 174 +               err = -EBUSY;
 175 +               goto err_put_hcd;
 176 +       }
 177 +
 178 +       hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 179 +       if (!hcd->regs)
 180 +               goto err_release_region;
 181 +       err = usb_add_hcd(hcd, irq, IRQF_SHARED);
 182 +       if (err)
 183 +               goto err_iounmap;
 184 +
 185 +       platform_set_drvdata(dev, hcd);
 186 +
 187 +       return err;
 188 +
 189 +err_iounmap:
 190 +       iounmap(hcd->regs);
 191 +err_release_region:
 192 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 193 +err_put_hcd:
 194 +       usb_put_hcd(hcd);
 195 +       return err;
 196 +}
 197 +
 198 +static int __devexit ehci_platform_remove(struct platform_device *dev)
 199 +{
 200 +       struct usb_hcd *hcd = platform_get_drvdata(dev);
 201 +
 202 +       usb_remove_hcd(hcd);
 203 +       iounmap(hcd->regs);
 204 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 205 +       usb_put_hcd(hcd);
 206 +       platform_set_drvdata(dev, NULL);
 207 +
 208 +       return 0;
 209 +}
 210 +
 211 +#ifdef CONFIG_PM
 212 +
 213 +static int ehci_platform_suspend(struct device *dev)
 214 +{
 215 +       struct usb_hcd *hcd = dev_get_drvdata(dev);
 216 +       bool wakeup = device_may_wakeup(dev);
 217 +
 218 +       ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd), wakeup);
 219 +       return 0;
 220 +}
 221 +
 222 +static int ehci_platform_resume(struct device *dev)
 223 +{
 224 +       struct usb_hcd *hcd = dev_get_drvdata(dev);
 225 +
 226 +       ehci_prepare_ports_for_controller_resume(hcd_to_ehci(hcd));
 227 +       return 0;
 228 +}
 229 +
 230 +#else /* !CONFIG_PM */
 231 +#define ehci_platform_suspend  NULL
 232 +#define ehci_platform_resume   NULL
 233 +#endif /* CONFIG_PM */
 234 +
 235 +static const struct platform_device_id ehci_platform_table[] = {
 236 +       { "ehci-platform", 0 },
 237 +       { }
 238 +};
 239 +MODULE_DEVICE_TABLE(platform, ehci_platform_table);
 240 +
 241 +static const struct dev_pm_ops ehci_platform_pm_ops = {
 242 +       .suspend        = ehci_platform_suspend,
 243 +       .resume         = ehci_platform_resume,
 244 +};
 245 +
 246 +static struct platform_driver ehci_platform_driver = {
 247 +       .id_table       = ehci_platform_table,
 248 +       .probe          = ehci_platform_probe,
 249 +       .remove         = __devexit_p(ehci_platform_remove),
 250 +       .shutdown       = usb_hcd_platform_shutdown,
 251 +       .driver         = {
 252 +               .owner  = THIS_MODULE,
 253 +               .name   = "ehci-platform",
 254 +               .pm     = &ehci_platform_pm_ops,
 255 +       }
 256 +};
 257 --- /dev/null
 258 +++ b/include/linux/usb/ehci_pdriver.h
 259 @@ -0,0 +1,46 @@
 260 +/*
 261 + * Copyright (C) 2012 Hauke Mehrtens <hauke@hauke-m.de>
 262 + *
 263 + * This program is free software; you can redistribute it and/or modify it
 264 + * under the terms of the GNU General Public License as published by the
 265 + * Free Software Foundation; either version 2 of the License, or (at your
 266 + * option) any later version.
 267 + *
 268 + * This program is distributed in the hope that it will be useful, but
 269 + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 270 + * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 271 + * for more details.
 272 + *
 273 + * You should have received a copy of the GNU General Public License
 274 + * along with this program; if not, write to the Free Software Foundation,
 275 + * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 276 + */
 277 +
 278 +#ifndef __USB_CORE_EHCI_PDRIVER_H
 279 +#define __USB_CORE_EHCI_PDRIVER_H
 280 +
 281 +/**
 282 + * struct usb_ehci_pdata - platform_data for generic ehci driver
 283 + *
 284 + * @caps_offset:       offset of the EHCI Capability Registers to the start of
 285 + *                     the io memory region provided to the driver.
 286 + * @has_tt:            set to 1 if TT is integrated in root hub.
 287 + * @port_power_on:     set to 1 if the controller needs a power up after
 288 + *                     initialization.
 289 + * @port_power_off:    set to 1 if the controller needs to be powered down
 290 + *                     after initialization.
 291 + *
 292 + * These are general configuration options for the EHCI controller. All of
 293 + * these options are activating more or less workarounds for some hardware.
 294 + */
 295 +struct usb_ehci_pdata {
 296 +       int             caps_offset;
 297 +       unsigned        has_tt:1;
 298 +       unsigned        has_synopsys_hc_bug:1;
 299 +       unsigned        big_endian_desc:1;
 300 +       unsigned        big_endian_mmio:1;
 301 +       unsigned        port_power_on:1;
 302 +       unsigned        port_power_off:1;
 303 +};
 304 +
 305 +#endif /* __USB_CORE_EHCI_PDRIVER_H */