target/linux/cns21xx/patches-3.8/104-cns21xx-usb-ehci-support.patch

   1 --- a/drivers/usb/host/ehci-hcd.c
   2 +++ b/drivers/usb/host/ehci-hcd.c
   3 @@ -1341,6 +1341,11 @@ MODULE_LICENSE ("GPL");
   4  #define        PLATFORM_DRIVER         ehci_hcd_sead3_driver
   5  #endif
   6
   7 +#ifdef CONFIG_ARCH_CNS21XX
   8 +#include "ehci-cns21xx.c"
   9 +#define PLATFORM_DRIVER                ehci_cns21xx_driver
  10 +#endif
  11 +
  12  #if !IS_ENABLED(CONFIG_USB_EHCI_PCI) && \
  13         !IS_ENABLED(CONFIG_USB_EHCI_HCD_PLATFORM) && \
  14         !IS_ENABLED(CONFIG_USB_CHIPIDEA_HOST) && \
  15 --- /dev/null
  16 +++ b/drivers/usb/host/ehci-cns21xx.c
  17 @@ -0,0 +1,187 @@
  18 +/*
  19 + *  Copyright (c) 2008 Cavium Networks
  20 + *  Copyright (c) 2010-2012 Gabor Juhos <juhosg@openwrt.org>
  21 + *
  22 + *  This file is free software; you can redistribute it and/or modify
  23 + *  it under the terms of the GNU General Public License, Version 2, as
  24 + *  published by the Free Software Foundation.
  25 + */
  26 +
  27 +#include <linux/platform_device.h>
  28 +#include <linux/irq.h>
  29 +
  30 +#include <mach/cns21xx.h>
  31 +
  32 +#define DRIVER_NAME    "cns21xx-ehci"
  33 +
  34 +static int cns21xx_ehci_reset(struct usb_hcd *hcd)
  35 +{
  36 +       struct ehci_hcd *ehci = hcd_to_ehci(hcd);
  37 +       int ret;
  38 +
  39 +       ret = ehci_halt(ehci);
  40 +       if (ret)
  41 +               return ret;
  42 +
  43 +       ret = ehci_init(hcd);
  44 +       if (ret)
  45 +               return ret;
  46 +
  47 +       ehci_reset(ehci);
  48 +
  49 +       return 0;
  50 +}
  51 +
  52 +static const struct hc_driver ehci_cns21xx_hc_driver = {
  53 +       .description            = hcd_name,
  54 +        .product_desc          = DRIVER_NAME,
  55 +        .hcd_priv_size         = sizeof(struct ehci_hcd),
  56 +
  57 +       /*
  58 +        * generic hardware linkage
  59 +        */
  60 +       .irq                    = ehci_irq,
  61 +       .flags                  = HCD_MEMORY | HCD_USB2,
  62 +
  63 +       /*
  64 +        * basic lifecycle operations
  65 +        */
  66 +       .reset                  = cns21xx_ehci_reset,
  67 +       .start                  = ehci_run,
  68 +       .stop                   = ehci_stop,
  69 +       .shutdown               = ehci_shutdown,
  70 +
  71 +       /*
  72 +        * managing i/o requests and associated device resources
  73 +        */
  74 +       .urb_enqueue            = ehci_urb_enqueue,
  75 +       .urb_dequeue            = ehci_urb_dequeue,
  76 +       .endpoint_disable       = ehci_endpoint_disable,
  77 +       .endpoint_reset         = ehci_endpoint_reset,
  78 +
  79 +       /*
  80 +        * scheduling support
  81 +        */
  82 +       .get_frame_number       = ehci_get_frame,
  83 +
  84 +       /*
  85 +        * root hub support
  86 +        */
  87 +       .hub_status_data        = ehci_hub_status_data,
  88 +       .hub_control            = ehci_hub_control,
  89 +       .relinquish_port        = ehci_relinquish_port,
  90 +       .port_handed_over       = ehci_port_handed_over,
  91 +
  92 +       .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
  93 +};
  94 +
  95 +static void cns21xx_ehci_init_hc(void)
  96 +{
  97 +       void __iomem *base = (void __iomem *) CNS21XX_EHCI_CONFIG_BASE_VIRT;
  98 +
  99 +       __raw_writel(0x106, base + 0x04);
 100 +       __raw_writel((3 << 5) | 0x2000, base + 0x40);
 101 +       msleep(100);
 102 +}
 103 +
 104 +static int ehci_cns21xx_probe(struct platform_device *pdev)
 105 +{
 106 +       struct usb_hcd *hcd;
 107 +       struct ehci_hcd *ehci;
 108 +       struct resource *res;
 109 +       int irq;
 110 +       int ret;
 111 +
 112 +       if (usb_disabled())
 113 +               return -ENODEV;
 114 +
 115 +       res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 116 +       if (!res) {
 117 +               dev_dbg(&pdev->dev, "no IRQ specified for %s\n",
 118 +                       dev_name(&pdev->dev));
 119 +               return -ENODEV;
 120 +       }
 121 +       irq = res->start;
 122 +
 123 +       hcd = usb_create_hcd(&ehci_cns21xx_hc_driver, &pdev->dev,
 124 +                            dev_name(&pdev->dev));
 125 +       if (!hcd)
 126 +               return -ENOMEM;
 127 +
 128 +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 129 +       if (!res) {
 130 +               dev_dbg(&pdev->dev, "no base address specified for %s\n",
 131 +                       dev_name(&pdev->dev));
 132 +               ret = -ENODEV;
 133 +               goto err_put_hcd;
 134 +       }
 135 +       hcd->rsrc_start = res->start;
 136 +       hcd->rsrc_len   = res->end - res->start + 1;
 137 +
 138 +       if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 139 +               dev_dbg(&pdev->dev, "controller already in use\n");
 140 +               ret = -EBUSY;
 141 +               goto err_put_hcd;
 142 +       }
 143 +
 144 +       hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
 145 +       if (!hcd->regs) {
 146 +               dev_dbg(&pdev->dev, "error mapping memory\n");
 147 +               ret = -EFAULT;
 148 +               goto err_release_region;
 149 +       }
 150 +
 151 +       cns21xx_ehci_init_hc();
 152 +
 153 +       ehci = hcd_to_ehci(hcd);
 154 +
 155 +       ehci->caps = hcd->regs;
 156 +       ehci->regs = hcd->regs +
 157 +                    HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
 158 +       dbg_hcs_params(ehci, "reset");
 159 +       dbg_hcc_params(ehci, "reset");
 160 +
 161 +       /* cache this readonly data; minimize chip reads */
 162 +       ehci->hcs_params = readl(&ehci->caps->hcs_params);
 163 +       ehci->sbrn = 0x20;
 164 +
 165 +       ret = usb_add_hcd(hcd, CNS21XX_IRQ_EHCI, IRQF_DISABLED);
 166 +       if (ret)
 167 +               goto err_unmap;
 168 +
 169 +       platform_set_drvdata(pdev, hcd);
 170 +       return 0;
 171 +
 172 +err_unmap:
 173 +       iounmap(hcd->regs);
 174 +err_release_region:
 175 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 176 +err_put_hcd:
 177 +       usb_put_hcd(hcd);
 178 +       return ret;
 179 +}
 180 +
 181 +static int ehci_cns21xx_remove(struct platform_device *pdev)
 182 +{
 183 +       struct usb_hcd *hcd = platform_get_drvdata(pdev);
 184 +
 185 +       usb_remove_hcd(hcd);
 186 +       iounmap(hcd->regs);
 187 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 188 +       usb_put_hcd(hcd);
 189 +       platform_set_drvdata(pdev, NULL);
 190 +
 191 +       return 0;
 192 +}
 193 +
 194 +static struct platform_driver ehci_cns21xx_driver = {
 195 +       .probe          = ehci_cns21xx_probe,
 196 +       .remove         = ehci_cns21xx_remove,
 197 +       .shutdown       = usb_hcd_platform_shutdown,
 198 +       .driver         = {
 199 +               .owner  = THIS_MODULE,
 200 +               .name   = DRIVER_NAME,
 201 +       },
 202 +};
 203 +
 204 +MODULE_ALIAS("platform:" DRIVER_NAME);
 205 --- a/arch/arm/Kconfig
 206 +++ b/arch/arm/Kconfig
 207 @@ -382,6 +382,7 @@ config ARCH_CNS21XX
 208         select ARCH_REQUIRE_GPIOLIB
 209         select ARM_L1_CACHE_SHIFT_4
 210         select USB_ARCH_HAS_OHCI
 211 +       select USB_ARCH_HAS_EHCI
 212         help
 213           Support for Cavium Networks CNS21xx family.
 214