target/linux/cns21xx/patches-3.10/103-cns21xx-usb-ohci-support.patch

   1 --- a/drivers/usb/host/ohci-hcd.c
   2 +++ b/drivers/usb/host/ohci-hcd.c
   3 @@ -697,6 +697,9 @@ retry:
   4
   5         periodic_reinit (ohci);
   6
   7 +       if (ohci->flags & OHCI_QUIRK_INIT_FMINTERVAL)
   8 +               ohci_writel (ohci, ohci->fminterval, &ohci->regs->fminterval);
   9 +
  10         /* some OHCI implementations are finicky about how they init.
  11          * bogus values here mean not even enumeration could work.
  12          */
  13 @@ -1191,6 +1194,11 @@ MODULE_LICENSE ("GPL");
  14  #define PLATFORM_DRIVER                ohci_hcd_tilegx_driver
  15  #endif
  16
  17 +#ifdef CONFIG_ARCH_CNS21XX
  18 +#include "ohci-cns21xx.c"
  19 +#define CNS21XX_PLATFORM_DRIVER                ohci_cns21xx_driver
  20 +#endif
  21 +
  22  #ifdef CONFIG_USB_OHCI_HCD_PLATFORM
  23  #include "ohci-platform.c"
  24  #define PLATFORM_DRIVER                ohci_platform_driver
  25 @@ -1211,7 +1219,8 @@ MODULE_LICENSE ("GPL");
  26         !defined(AT91_PLATFORM_DRIVER) && \
  27         !defined(NXP_PLATFORM_DRIVER) && \
  28         !defined(DAVINCI_PLATFORM_DRIVER) && \
  29 -       !defined(SPEAR_PLATFORM_DRIVER)
  30 +       !defined(SPEAR_PLATFORM_DRIVER) && \
  31 +       !defined(CNS21XX_PLATFORM_DRIVER)
  32  #error "missing bus glue for ohci-hcd"
  33  #endif
  34
  35 @@ -1331,9 +1340,19 @@ static int __init ohci_hcd_mod_init(void
  36                 goto error_spear;
  37  #endif
  38
  39 +#ifdef CNS21XX_PLATFORM_DRIVER
  40 +       retval = platform_driver_register(&CNS21XX_PLATFORM_DRIVER);
  41 +       if (retval < 0)
  42 +               goto error_cns21xx;
  43 +#endif
  44 +
  45         return retval;
  46
  47         /* Error path */
  48 +#ifdef CNS21XX_PLATFORM_DRIVER
  49 +       platform_driver_unregister(&CNS21XX_PLATFORM_DRIVER);
  50 + error_cns21xx:
  51 +#endif
  52  #ifdef SPEAR_PLATFORM_DRIVER
  53         platform_driver_unregister(&SPEAR_PLATFORM_DRIVER);
  54   error_spear:
  55 @@ -1411,6 +1430,9 @@ module_init(ohci_hcd_mod_init);
  56
  57  static void __exit ohci_hcd_mod_exit(void)
  58  {
  59 +#ifdef CNS21XX_PLATFORM_DRIVER
  60 +       platform_driver_unregister(&CNS21XX_PLATFORM_DRIVER);
  61 +#endif
  62  #ifdef SPEAR_PLATFORM_DRIVER
  63         platform_driver_unregister(&SPEAR_PLATFORM_DRIVER);
  64  #endif
  65 --- /dev/null
  66 +++ b/drivers/usb/host/ohci-cns21xx.c
  67 @@ -0,0 +1,178 @@
  68 +/*
  69 + *  Copyright (c) 2008 Cavium Networks
  70 + *  Copyright (c) 2010-2012 Gabor Juhos <juhosg@openwrt.org>
  71 + *
  72 + *  This file is free software; you can redistribute it and/or modify
  73 + *  it under the terms of the GNU General Public License, Version 2, as
  74 + *  published by the Free Software Foundation.
  75 + */
  76 +
  77 +#include <linux/platform_device.h>
  78 +
  79 +#include <mach/cns21xx.h>
  80 +
  81 +#define DRIVER_NAME    "cns21xx-ohci"
  82 +
  83 +static int cns21xx_ohci_start(struct usb_hcd *hcd)
  84 +{
  85 +       struct ohci_hcd *ohci = hcd_to_ohci(hcd);
  86 +       int ret;
  87 +
  88 +       ret = ohci_init(ohci);
  89 +       if (ret)
  90 +               return ret;
  91 +
  92 +       ret = ohci_run(ohci);
  93 +       if (ret) {
  94 +               ohci_err(ohci, "can't start %s",
  95 +                        ohci_to_hcd(ohci)->self.bus_name);
  96 +               goto err;
  97 +       }
  98 +
  99 +       return 0;
 100 +
 101 +err:
 102 +       ohci_stop(hcd);
 103 +       return ret;
 104 +}
 105 +
 106 +static const struct hc_driver ohci_cns21xx_hc_driver = {
 107 +       .description            = hcd_name,
 108 +       .product_desc           = "cns21xx-ohci",
 109 +       .hcd_priv_size          = sizeof(struct ohci_hcd),
 110 +
 111 +       /*
 112 +        * generic hardware linkage
 113 +        */
 114 +       .irq                    = ohci_irq,
 115 +       .flags                  = HCD_USB11 | HCD_MEMORY,
 116 +
 117 +       /*
 118 +        * basic lifecycle operations
 119 +        */
 120 +       .start                  = cns21xx_ohci_start,
 121 +       .stop                   = ohci_stop,
 122 +       .shutdown               = ohci_shutdown,
 123 +
 124 +       /*
 125 +        * managing i/o requests and associated device resources
 126 +        */
 127 +       .urb_enqueue            = ohci_urb_enqueue,
 128 +       .urb_dequeue            = ohci_urb_dequeue,
 129 +       .endpoint_disable       = ohci_endpoint_disable,
 130 +
 131 +       /*
 132 +        * scheduling support
 133 +        */
 134 +       .get_frame_number       = ohci_get_frame,
 135 +
 136 +       /*
 137 +        * root hub support
 138 +        */
 139 +       .hub_status_data        = ohci_hub_status_data,
 140 +       .hub_control            = ohci_hub_control,
 141 +       .start_port_reset       = ohci_start_port_reset,
 142 +};
 143 +
 144 +static void cns21xx_ohci_init_hc(void)
 145 +{
 146 +       void __iomem *base = (void __iomem *) CNS21XX_OHCI_CONFIG_BASE_VIRT;
 147 +
 148 +       __raw_writel(0x146, base + 0x04);
 149 +       __raw_writel(0x200, base + 0x44);
 150 +       msleep(100);
 151 +}
 152 +
 153 +static int ohci_cns21xx_probe(struct platform_device *pdev)
 154 +{
 155 +       struct usb_hcd *hcd;
 156 +       struct resource *res;
 157 +       struct ohci_hcd *ohci;
 158 +       int irq;
 159 +       int ret;
 160 +
 161 +       if (usb_disabled())
 162 +               return -ENODEV;
 163 +
 164 +       res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 165 +       if (!res) {
 166 +               dev_dbg(&pdev->dev, "no IRQ specified for %s\n",
 167 +                       dev_name(&pdev->dev));
 168 +               return -ENODEV;
 169 +       }
 170 +       irq = res->start;
 171 +
 172 +       hcd = usb_create_hcd(&ohci_cns21xx_hc_driver, &pdev->dev,
 173 +                            dev_name(&pdev->dev));
 174 +       if (!hcd)
 175 +               return -ENOMEM;
 176 +
 177 +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 178 +       if (!res) {
 179 +               dev_dbg(&pdev->dev, "no base address specified for %s\n",
 180 +                       dev_name(&pdev->dev));
 181 +               ret = -ENODEV;
 182 +               goto err_put_hcd;
 183 +       }
 184 +       hcd->rsrc_start = res->start;
 185 +       hcd->rsrc_len   = res->end - res->start + 1;
 186 +
 187 +       if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 188 +               dev_dbg(&pdev->dev, "controller already in use\n");
 189 +               ret = -EBUSY;
 190 +               goto err_put_hcd;
 191 +       }
 192 +
 193 +       hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
 194 +       if (!hcd->regs) {
 195 +               dev_dbg(&pdev->dev, "error mapping memory\n");
 196 +               ret = -EFAULT;
 197 +               goto err_release_region;
 198 +       }
 199 +
 200 +       cns21xx_ohci_init_hc();
 201 +
 202 +       ohci = hcd_to_ohci(hcd);
 203 +       ohci->flags |= OHCI_QUIRK_INIT_FMINTERVAL;
 204 +       ohci_hcd_init(ohci);
 205 +
 206 +       ret = usb_add_hcd(hcd, irq,  IRQF_DISABLED);
 207 +       if (ret)
 208 +               goto err_unmap;
 209 +
 210 +       platform_set_drvdata(pdev, hcd);
 211 +       return 0;
 212 +
 213 +err_unmap:
 214 +       iounmap(hcd->regs);
 215 +err_release_region:
 216 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 217 +err_put_hcd:
 218 +       usb_put_hcd(hcd);
 219 +       return ret;
 220 +}
 221 +
 222 +static int ohci_cns21xx_remove(struct platform_device *pdev)
 223 +{
 224 +       struct usb_hcd *hcd = platform_get_drvdata(pdev);
 225 +
 226 +       usb_remove_hcd(hcd);
 227 +       iounmap(hcd->regs);
 228 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 229 +       usb_put_hcd(hcd);
 230 +       platform_set_drvdata(pdev, NULL);
 231 +
 232 +       return 0;
 233 +}
 234 +
 235 +static struct platform_driver ohci_cns21xx_driver = {
 236 +       .probe          = ohci_cns21xx_probe,
 237 +       .remove         = ohci_cns21xx_remove,
 238 +       .shutdown       = usb_hcd_platform_shutdown,
 239 +       .driver         = {
 240 +               .owner  = THIS_MODULE,
 241 +               .name   = DRIVER_NAME,
 242 +       },
 243 +};
 244 +
 245 +MODULE_ALIAS("platform:" DRIVER_NAME);
 246 --- a/drivers/usb/host/ohci.h
 247 +++ b/drivers/usb/host/ohci.h
 248 @@ -405,6 +405,7 @@ struct ohci_hcd {
 249  #define        OHCI_QUIRK_HUB_POWER    0x100                   /* distrust firmware power/oc setup */
 250  #define        OHCI_QUIRK_AMD_PLL      0x200                   /* AMD PLL quirk*/
 251  #define        OHCI_QUIRK_AMD_PREFETCH 0x400                   /* pre-fetch for ISO transfer */
 252 +#define        OHCI_QUIRK_INIT_FMINTERVAL 0x1000               /* fminterval must be initialized */
 253         // there are also chip quirks/bugs in init logic
 254
 255         struct work_struct      nec_work;       /* Worker for NEC quirk */
 256 --- a/arch/arm/Kconfig
 257 +++ b/arch/arm/Kconfig
 258 @@ -374,6 +374,7 @@ config ARCH_CNS21XX
 259         select PLAT_FA_GPIO
 260         select ARCH_REQUIRE_GPIOLIB
 261         select ARM_L1_CACHE_SHIFT_4
 262 +       select USB_ARCH_HAS_OHCI
 263         help
 264           Support for Cavium Networks CNS21xx family.
 265