target/linux/brcm47xx/patches-3.2/181-USB-OHCI-Add-a-generic-platform-device-driver.patch

   1 From 2232a2ab6015496fecdfad68a9d6794312a9b2f2 Mon Sep 17 00:00:00 2001
   2 From: Hauke Mehrtens <hauke@hauke-m.de>
   3 Date: Sat, 26 Nov 2011 21:20:54 +0100
   4 Subject: [PATCH 181/186] USB: OHCI: 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 OHCI controller works like a PCI controller. It will be
   9 used for the Broadcom bcma and ssb USB OHCI controller.
  10
  11 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
  12 ---
  13  drivers/usb/host/Kconfig         |   10 ++
  14  drivers/usb/host/ohci-hcd.c      |    5 +
  15  drivers/usb/host/ohci-platform.c |  183 ++++++++++++++++++++++++++++++++++++++
  16  3 files changed, 198 insertions(+), 0 deletions(-)
  17  create mode 100644 drivers/usb/host/ohci-platform.c
  18
  19 --- a/drivers/usb/host/Kconfig
  20 +++ b/drivers/usb/host/Kconfig
  21 @@ -378,6 +378,16 @@ config USB_CNS3XXX_OHCI
  22           Enable support for the CNS3XXX SOC's on-chip OHCI controller.
  23           It is needed for low-speed USB 1.0 device support.
  24
  25 +config USB_OHCI_HCD_PLATFORM
  26 +       bool "OHCI driver for a platform device"
  27 +       depends on USB_OHCI_HCD && EXPERIMENTAL
  28 +       default n
  29 +       ---help---
  30 +         Adds an OHCI host driver for a generic platform device, which
  31 +         provieds a memory space and an irq.
  32 +
  33 +         If unsure, say N.
  34 +
  35  config USB_OHCI_BIG_ENDIAN_DESC
  36         bool
  37         depends on USB_OHCI_HCD
  38 --- a/drivers/usb/host/ohci-hcd.c
  39 +++ b/drivers/usb/host/ohci-hcd.c
  40 @@ -1116,6 +1116,11 @@ MODULE_LICENSE ("GPL");
  41  #define PLATFORM_DRIVER                ohci_xls_driver
  42  #endif
  43
  44 +#ifdef CONFIG_USB_OHCI_HCD_PLATFORM
  45 +#include "ohci-platform.c"
  46 +#define PLATFORM_DRIVER                ohci_platform_driver
  47 +#endif
  48 +
  49  #if    !defined(PCI_DRIVER) &&         \
  50         !defined(PLATFORM_DRIVER) &&    \
  51         !defined(OMAP1_PLATFORM_DRIVER) &&      \
  52 --- /dev/null
  53 +++ b/drivers/usb/host/ohci-platform.c
  54 @@ -0,0 +1,183 @@
  55 +/*
  56 + * Generic platform ohci driver
  57 + *
  58 + * Copyright 2007 Michael Buesch <m@bues.ch>
  59 + * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
  60 + *
  61 + * Derived from the OCHI-SSB driver
  62 + * Derived from the OHCI-PCI driver
  63 + * Copyright 1999 Roman Weissgaerber
  64 + * Copyright 2000-2002 David Brownell
  65 + * Copyright 1999 Linus Torvalds
  66 + * Copyright 1999 Gregory P. Smith
  67 + *
  68 + * Licensed under the GNU/GPL. See COPYING for details.
  69 + */
  70 +#include <linux/platform_device.h>
  71 +#include <linux/usb/hci_driver.h>
  72 +
  73 +static int ohci_platform_reset(struct usb_hcd *hcd)
  74 +{
  75 +       struct ohci_hcd *ohci = hcd_to_ohci(hcd);
  76 +       int err;
  77 +
  78 +       ohci_hcd_init(ohci);
  79 +       err = ohci_init(ohci);
  80 +
  81 +       return err;
  82 +}
  83 +
  84 +static int ohci_platform_start(struct usb_hcd *hcd)
  85 +{
  86 +       struct ohci_hcd *ohci = hcd_to_ohci(hcd);
  87 +       int err;
  88 +
  89 +       err = ohci_run(ohci);
  90 +       if (err < 0) {
  91 +               ohci_err(ohci, "can't start\n");
  92 +               ohci_stop(hcd);
  93 +       }
  94 +
  95 +       return err;
  96 +}
  97 +
  98 +static const struct hc_driver ohci_platform_hc_driver = {
  99 +       .description            = hcd_name,
 100 +       .product_desc           = "Generic Platform OHCI Controller",
 101 +       .hcd_priv_size          = sizeof(struct ohci_hcd),
 102 +
 103 +       .irq                    = ohci_irq,
 104 +       .flags                  = HCD_MEMORY | HCD_USB11,
 105 +
 106 +       .reset                  = ohci_platform_reset,
 107 +       .start                  = ohci_platform_start,
 108 +       .stop                   = ohci_stop,
 109 +       .shutdown               = ohci_shutdown,
 110 +
 111 +       .urb_enqueue            = ohci_urb_enqueue,
 112 +       .urb_dequeue            = ohci_urb_dequeue,
 113 +       .endpoint_disable       = ohci_endpoint_disable,
 114 +
 115 +       .get_frame_number       = ohci_get_frame,
 116 +
 117 +       .hub_status_data        = ohci_hub_status_data,
 118 +       .hub_control            = ohci_hub_control,
 119 +#ifdef CONFIG_PM
 120 +       .bus_suspend            = ohci_bus_suspend,
 121 +       .bus_resume             = ohci_bus_resume,
 122 +#endif
 123 +
 124 +       .start_port_reset       = ohci_start_port_reset,
 125 +};
 126 +
 127 +static int __devinit ohci_platform_probe(struct platform_device *dev)
 128 +{
 129 +       struct usb_hcd *hcd;
 130 +       struct resource *res_mem;
 131 +       int irq;
 132 +       int err = -ENOMEM;
 133 +
 134 +       if (usb_disabled())
 135 +               return -ENODEV;
 136 +
 137 +       irq = platform_get_irq(dev, 0);
 138 +       if (irq < 0) {
 139 +               pr_err("no irq provieded");
 140 +               return irq;
 141 +       }
 142 +
 143 +       res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
 144 +       if (!res_mem) {
 145 +               pr_err("no memory recourse provieded");
 146 +               return -ENXIO;
 147 +       }
 148 +
 149 +       hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
 150 +                       dev_name(&dev->dev));
 151 +       if (!hcd)
 152 +               return -ENOMEM;
 153 +
 154 +       hcd->rsrc_start = res_mem->start;
 155 +       hcd->rsrc_len = resource_size(res_mem);
 156 +
 157 +       if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 158 +               pr_err("controller already in use");
 159 +               err = -EBUSY;
 160 +               goto err_put_hcd;
 161 +       }
 162 +
 163 +       hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 164 +       if (!hcd->regs)
 165 +               goto err_release_region;
 166 +       err = usb_add_hcd(hcd, irq, IRQF_SHARED);
 167 +       if (err)
 168 +               goto err_iounmap;
 169 +
 170 +       platform_set_drvdata(dev, hcd);
 171 +
 172 +       return err;
 173 +
 174 +err_iounmap:
 175 +       iounmap(hcd->regs);
 176 +err_release_region:
 177 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 178 +err_put_hcd:
 179 +       usb_put_hcd(hcd);
 180 +       return err;
 181 +}
 182 +
 183 +static int __devexit ohci_platform_remove(struct platform_device *dev)
 184 +{
 185 +       struct usb_hcd *hcd = platform_get_drvdata(dev);
 186 +
 187 +       usb_remove_hcd(hcd);
 188 +       iounmap(hcd->regs);
 189 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 190 +       usb_put_hcd(hcd);
 191 +       platform_set_drvdata(dev, NULL);
 192 +
 193 +       return 0;
 194 +}
 195 +
 196 +#ifdef CONFIG_PM
 197 +
 198 +static int ohci_platform_suspend(struct device *dev)
 199 +{
 200 +       return 0;
 201 +}
 202 +
 203 +static int ohci_platform_resume(struct device *dev)
 204 +{
 205 +       struct usb_hcd *hcd = dev_get_drvdata(dev);
 206 +
 207 +       ohci_finish_controller_resume(hcd);
 208 +       return 0;
 209 +}
 210 +
 211 +#else /* !CONFIG_PM */
 212 +#define ohci_platform_suspend  NULL
 213 +#define ohci_platform_resume   NULL
 214 +#endif /* CONFIG_PM */
 215 +
 216 +static const struct platform_device_id ohci_platform_table[] = {
 217 +       { "ohci-platform", 0 },
 218 +       { }
 219 +};
 220 +MODULE_DEVICE_TABLE(platform, ohci_platform_table);
 221 +
 222 +static const struct dev_pm_ops ohci_platform_pm_ops = {
 223 +       .suspend        = ohci_platform_suspend,
 224 +       .resume         = ohci_platform_resume,
 225 +};
 226 +
 227 +static struct platform_driver ohci_platform_driver = {
 228 +       .id_table       = ohci_platform_table,
 229 +       .probe          = ohci_platform_probe,
 230 +       .remove         = __devexit_p(ohci_platform_remove),
 231 +       .shutdown       = usb_hcd_platform_shutdown,
 232 +       .driver         = {
 233 +               .owner  = THIS_MODULE,
 234 +               .name   = "ohci-platform",
 235 +               .pm     = &ohci_platform_pm_ops,
 236 +       }
 237 +};