target/linux/brcm47xx/patches-2.6.31/270-ehci-ssb.patch

   1 ---
   2  drivers/usb/host/Kconfig    |   13 ++
   3  drivers/usb/host/ehci-hcd.c |   12 ++
   4  drivers/usb/host/ehci-ssb.c |  201 ++++++++++++++++++++++++++++++++++++++++++++
   5  drivers/usb/host/ohci-ssb.c |   23 +++++
   6  4 files changed, 247 insertions(+), 2 deletions(-)
   7
   8 --- a/drivers/usb/host/Kconfig
   9 +++ b/drivers/usb/host/Kconfig
  10 @@ -126,6 +126,19 @@ config USB_OXU210HP_HCD
  11           To compile this driver as a module, choose M here: the
  12           module will be called oxu210hp-hcd.
  13
  14 +config USB_EHCI_HCD_SSB
  15 +       bool "EHCI support for Broadcom SSB EHCI core"
  16 +       depends on USB_EHCI_HCD && SSB && EXPERIMENTAL
  17 +       default n
  18 +       ---help---
  19 +         Support for the Sonics Silicon Backplane (SSB) attached
  20 +         Broadcom USB EHCI core.
  21 +
  22 +         This device is present in some embedded devices with
  23 +         Broadcom based SSB bus.
  24 +
  25 +         If unsure, say N.
  26 +
  27  config USB_ISP116X_HCD
  28         tristate "ISP116X HCD support"
  29         depends on USB
  30 --- a/drivers/usb/host/ehci-hcd.c
  31 +++ b/drivers/usb/host/ehci-hcd.c
  32 @@ -1117,8 +1117,16 @@ MODULE_LICENSE ("GPL");
  33  #define        PLATFORM_DRIVER         ixp4xx_ehci_driver
  34  #endif
  35
  36 -#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
  37 -    !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER)
  38 +#ifdef CONFIG_USB_EHCI_HCD_SSB
  39 +#include "ehci-ssb.c"
  40 +#define SSB_EHCI_DRIVER         ssb_ehci_driver
  41 +#endif
  42 +
  43 +#if !defined(PCI_DRIVER) && \
  44 +    !defined(PLATFORM_DRIVER) && \
  45 +    !defined(PS3_SYSTEM_BUS_DRIVER) && \
  46 +    !defined(OF_PLATFORM_DRIVER) && \
  47 +    !defined(SSB_EHCI_DRIVER)
  48  #error "missing bus glue for ehci-hcd"
  49  #endif
  50
  51 --- /dev/null
  52 +++ b/drivers/usb/host/ehci-ssb.c
  53 @@ -0,0 +1,201 @@
  54 +/*
  55 + * Sonics Silicon Backplane
  56 + * Broadcom USB-core EHCI driver (SSB bus glue)
  57 + *
  58 + * Copyright 2007 Steven Brown <sbrown@cortland.com>
  59 + *
  60 + * Derived from the OHCI-SSB driver
  61 + * Copyright 2007 Michael Buesch <mb@bu3sch.de>
  62 + *
  63 + * Derived from the EHCI-PCI driver
  64 + * Copyright (c) 2000-2004 by David Brownell
  65 + *
  66 + * Derived from the OHCI-PCI driver
  67 + * Copyright 1999 Roman Weissgaerber
  68 + * Copyright 2000-2002 David Brownell
  69 + * Copyright 1999 Linus Torvalds
  70 + * Copyright 1999 Gregory P. Smith
  71 + *
  72 + * Derived from the USBcore related parts of Broadcom-SB
  73 + * Copyright 2005 Broadcom Corporation
  74 + *
  75 + * Licensed under the GNU/GPL. See COPYING for details.
  76 + */
  77 +#include <linux/ssb/ssb.h>
  78 +
  79 +#define SSB_OHCI_TMSLOW_HOSTMODE       (1 << 29)
  80 +
  81 +struct ssb_ehci_device {
  82 +       struct ehci_hcd ehci; /* _must_ be at the beginning. */
  83 +
  84 +       u32 enable_flags;
  85 +};
  86 +
  87 +static inline
  88 +struct ssb_ehci_device *hcd_to_ssb_ehci(struct usb_hcd *hcd)
  89 +{
  90 +       return (struct ssb_ehci_device *)(hcd->hcd_priv);
  91 +}
  92 +
  93 +
  94 +static int ssb_ehci_reset(struct usb_hcd *hcd)
  95 +{
  96 +       struct ehci_hcd *ehci = hcd_to_ehci(hcd);
  97 +       int err;
  98 +
  99 +       ehci->caps = hcd->regs;
 100 +       ehci->regs = hcd->regs +
 101 +               HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
 102 +
 103 +       dbg_hcs_params(ehci, "reset");
 104 +       dbg_hcc_params(ehci, "reset");
 105 +
 106 +       ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 107 +
 108 +       err = ehci_halt(ehci);
 109 +
 110 +       if (err)
 111 +               return err;
 112 +
 113 +       err = ehci_init(hcd);
 114 +
 115 +       if (err)
 116 +               return err;
 117 +
 118 +       ehci_port_power(ehci, 0);
 119 +
 120 +       return err;
 121 +}
 122 +
 123 +static int ssb_ehci_start(struct usb_hcd *hcd)
 124 +{
 125 +       struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 126 +       int err;
 127 +
 128 +       err = ehci_run(hcd);
 129 +       if (err < 0) {
 130 +               ehci_err(ehci, "can't start\n");
 131 +               ehci_stop(hcd);
 132 +       }
 133 +
 134 +       return err;
 135 +}
 136 +
 137 +#ifdef CONFIG_PM
 138 +static int ssb_ehci_hcd_suspend(struct usb_hcd *hcd, pm_message_t message)
 139 +{
 140 +       struct ssb_ehci_device *ehcidev = hcd_to_ssb_ehci(hcd);
 141 +       struct ehci_hcd *ehci = &ehcidev->ehci;
 142 +       unsigned long flags;
 143 +
 144 +       spin_lock_irqsave(&ehci->lock, flags);
 145 +
 146 +       ehci_writel(ehci, EHCI_INTR_MIE, &ehci->regs->intrdisable);
 147 +       ehci_readl(ehci, &ehci->regs->intrdisable); /* commit write */
 148 +
 149 +       /* make sure snapshot being resumed re-enumerates everything */
 150 +       if (message.event == PM_EVENT_PRETHAW)
 151 +               ehci_usb_reset(ehci);
 152 +
 153 +       clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 154 +
 155 +       spin_unlock_irqrestore(&ehci->lock, flags);
 156 +       return 0;
 157 +}
 158 +
 159 +static int ssb_ehci_hcd_resume(struct usb_hcd *hcd)
 160 +{
 161 +       set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 162 +       usb_hcd_resume_root_hub(hcd);
 163 +       return 0;
 164 +}
 165 +#endif /* CONFIG_PM */
 166 +
 167 +static const struct hc_driver ssb_ehci_hc_driver = {
 168 +       .description            = "ssb-usb-ehci",
 169 +       .product_desc           = "SSB EHCI Controller",
 170 +       .hcd_priv_size          = sizeof(struct ssb_ehci_device),
 171 +
 172 +       .irq                    = ehci_irq,
 173 +       .flags                  = HCD_MEMORY | HCD_USB2,
 174 +
 175 +       .reset                  = ssb_ehci_reset,
 176 +       .start                  = ssb_ehci_start,
 177 +       .stop                   = ehci_stop,
 178 +       .shutdown               = ehci_shutdown,
 179 +
 180 +#ifdef CONFIG_PM
 181 +       .suspend                = ssb_ehci_hcd_suspend,
 182 +       .resume                 = ssb_ehci_hcd_resume,
 183 +#endif
 184 +
 185 +       .urb_enqueue            = ehci_urb_enqueue,
 186 +       .urb_dequeue            = ehci_urb_dequeue,
 187 +       .endpoint_disable       = ehci_endpoint_disable,
 188 +
 189 +       .get_frame_number       = ehci_get_frame,
 190 +
 191 +       .hub_status_data        = ehci_hub_status_data,
 192 +       .hub_control            = ehci_hub_control,
 193 +#ifdef CONFIG_PM
 194 +       .bus_suspend            = ehci_bus_suspend,
 195 +       .bus_resume             = ehci_bus_resume,
 196 +#endif
 197 +
 198 +};
 199 +
 200 +static void ssb_ehci_detach(struct ssb_device *dev, struct usb_hcd *hcd)
 201 +{
 202 +
 203 +       usb_remove_hcd(hcd);
 204 +       iounmap(hcd->regs);
 205 +       usb_put_hcd(hcd);
 206 +}
 207 +EXPORT_SYMBOL_GPL(ssb_ehci_detach);
 208 +
 209 +static int ssb_ehci_attach(struct ssb_device *dev, struct usb_hcd **ehci_hcd)
 210 +{
 211 +       struct ssb_ehci_device *ehcidev;
 212 +       struct usb_hcd *hcd;
 213 +       int err = -ENOMEM;
 214 +       u32 tmp, flags = 0;
 215 +
 216 +       hcd = usb_create_hcd(&ssb_ehci_hc_driver, dev->dev,
 217 +                            dev_name(dev->dev));
 218 +       if (!hcd)
 219 +               goto err_dev_disable;
 220 +
 221 +       ehcidev = hcd_to_ssb_ehci(hcd);
 222 +       ehcidev->enable_flags = flags;
 223 +       tmp = ssb_read32(dev, SSB_ADMATCH0);
 224 +       hcd->rsrc_start = ssb_admatch_base(tmp) + 0x800; /* ehci core offset */
 225 +       hcd->rsrc_len = 0x100; /* ehci reg block size */
 226 +       /*
 227 +        * start & size modified per sbutils.c
 228 +        */
 229 +       hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
 230 +       if (!hcd->regs)
 231 +               goto err_put_hcd;
 232 +       err = usb_add_hcd(hcd, dev->irq, IRQF_SHARED | IRQF_DISABLED);
 233 +       if (err)
 234 +               goto err_iounmap;
 235 +
 236 +       *ehci_hcd = hcd;
 237 +
 238 +       return err;
 239 +
 240 +err_iounmap:
 241 +       iounmap(hcd->regs);
 242 +err_put_hcd:
 243 +       usb_put_hcd(hcd);
 244 +err_dev_disable:
 245 +       ssb_device_disable(dev, flags);
 246 +       return err;
 247 +}
 248 +EXPORT_SYMBOL_GPL(ssb_ehci_attach);
 249 +
 250 +static const struct ssb_device_id ssb_ehci_table[] = {
 251 +       SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_USB20_HOST, SSB_ANY_REV),
 252 +       SSB_DEVTABLE_END
 253 +};
 254 +MODULE_DEVICE_TABLE(ssb, ssb_ehci_table);
 255 --- a/drivers/usb/host/ohci-ssb.c
 256 +++ b/drivers/usb/host/ohci-ssb.c
 257 @@ -17,6 +17,8 @@
 258   */
 259  #include <linux/ssb/ssb.h>
 260
 261 +extern int ssb_ehci_attach(struct ssb_device *dev, struct usb_hcd **hcd);
 262 +extern void ssb_ehci_detach(struct ssb_device *dev, struct usb_hcd *hcd);
 263
 264  #define SSB_OHCI_TMSLOW_HOSTMODE       (1 << 29)
 265
 266 @@ -24,6 +26,7 @@ struct ssb_ohci_device {
 267         struct ohci_hcd ohci; /* _must_ be at the beginning. */
 268
 269         u32 enable_flags;
 270 +       struct usb_hcd *ehci_hcd;
 271  };
 272
 273  static inline
 274 @@ -92,13 +95,25 @@ static const struct hc_driver ssb_ohci_h
 275  static void ssb_ohci_detach(struct ssb_device *dev)
 276  {
 277         struct usb_hcd *hcd = ssb_get_drvdata(dev);
 278 +#ifdef CONFIG_USB_EHCI_HCD_SSB
 279 +       struct ssb_ohci_device *ohcidev = hcd_to_ssb_ohci(hcd);
 280 +#endif
 281
 282         usb_remove_hcd(hcd);
 283         iounmap(hcd->regs);
 284         usb_put_hcd(hcd);
 285 +
 286 +#ifdef CONFIG_USB_EHCI_HCD_SSB
 287 +       /*
 288 +        * Also detach ehci function
 289 +        */
 290 +       if (dev->id.coreid == SSB_DEV_USB20_HOST)
 291 +               ssb_ehci_detach(dev, ohcidev->ehci_hcd);
 292 +#endif
 293         ssb_device_disable(dev, 0);
 294  }
 295
 296 +
 297  static int ssb_ohci_attach(struct ssb_device *dev)
 298  {
 299         struct ssb_ohci_device *ohcidev;
 300 @@ -165,6 +180,14 @@ static int ssb_ohci_attach(struct ssb_de
 301
 302         ssb_set_drvdata(dev, hcd);
 303
 304 +#ifdef CONFIG_USB_EHCI_HCD_SSB
 305 +       /*
 306 +        * attach ehci function in this core
 307 +        */
 308 +       if (dev->id.coreid == SSB_DEV_USB20_HOST)
 309 +               err = ssb_ehci_attach(dev, &(ohcidev->ehci_hcd));
 310 +#endif
 311 +
 312         return err;
 313
 314  err_iounmap: