target/linux/cns21xx/patches-3.7/104-cns21xx-usb-ehci-support.patch

   1 --- a/drivers/usb/host/ehci-hcd.c
   2 +++ b/drivers/usb/host/ehci-hcd.c
   3 @@ -1269,6 +1269,11 @@ MODULE_LICENSE ("GPL");
   4  #define PLATFORM_DRIVER                ehci_octeon_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  #ifdef CONFIG_USB_CNS3XXX_EHCI
  13  #include "ehci-cns3xxx.c"
  14  #define PLATFORM_DRIVER                cns3xxx_ehci_driver
  15 --- /dev/null
  16 +++ b/drivers/usb/host/ehci-cns21xx.c
  17 @@ -0,0 +1,186 @@
  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 +       ehci_port_power(ehci, 0);
  49 +
  50 +       return 0;
  51 +}
  52 +
  53 +static const struct hc_driver ehci_cns21xx_hc_driver = {
  54 +       .description            = hcd_name,
  55 +        .product_desc          = DRIVER_NAME,
  56 +        .hcd_priv_size         = sizeof(struct ehci_hcd),
  57 +
  58 +       /*
  59 +        * generic hardware linkage
  60 +        */
  61 +       .irq                    = ehci_irq,
  62 +       .flags                  = HCD_MEMORY | HCD_USB2,
  63 +
  64 +       /*
  65 +        * basic lifecycle operations
  66 +        */
  67 +       .reset                  = cns21xx_ehci_reset,
  68 +       .start                  = ehci_run,
  69 +       .stop                   = ehci_stop,
  70 +       .shutdown               = ehci_shutdown,
  71 +
  72 +       /*
  73 +        * managing i/o requests and associated device resources
  74 +        */
  75 +       .urb_enqueue            = ehci_urb_enqueue,
  76 +       .urb_dequeue            = ehci_urb_dequeue,
  77 +       .endpoint_disable       = ehci_endpoint_disable,
  78 +       .endpoint_reset         = ehci_endpoint_reset,
  79 +
  80 +       /*
  81 +        * scheduling support
  82 +        */
  83 +       .get_frame_number       = ehci_get_frame,
  84 +
  85 +       /*
  86 +        * root hub support
  87 +        */
  88 +       .hub_status_data        = ehci_hub_status_data,
  89 +       .hub_control            = ehci_hub_control,
  90 +       .relinquish_port        = ehci_relinquish_port,
  91 +       .port_handed_over       = ehci_port_handed_over,
  92 +
  93 +       .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
  94 +};
  95 +
  96 +static void cns21xx_ehci_init_hc(void)
  97 +{
  98 +       __raw_writel(0x106, CNS21XX_EHCI_CONFIG_BASE_VIRT + 0x04);
  99 +       __raw_writel((3 << 5) | 0x2000, CNS21XX_EHCI_CONFIG_BASE_VIRT + 0x40);
 100 +       msleep(100);
 101 +}
 102 +
 103 +static int ehci_cns21xx_probe(struct platform_device *pdev)
 104 +{
 105 +       struct usb_hcd *hcd;
 106 +       struct ehci_hcd *ehci;
 107 +       struct resource *res;
 108 +       int irq;
 109 +       int ret;
 110 +
 111 +       if (usb_disabled())
 112 +               return -ENODEV;
 113 +
 114 +       res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 115 +       if (!res) {
 116 +               dev_dbg(&pdev->dev, "no IRQ specified for %s\n",
 117 +                       dev_name(&pdev->dev));
 118 +               return -ENODEV;
 119 +       }
 120 +       irq = res->start;
 121 +
 122 +       hcd = usb_create_hcd(&ehci_cns21xx_hc_driver, &pdev->dev,
 123 +                            dev_name(&pdev->dev));
 124 +       if (!hcd)
 125 +               return -ENOMEM;
 126 +
 127 +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 128 +       if (!res) {
 129 +               dev_dbg(&pdev->dev, "no base address specified for %s\n",
 130 +                       dev_name(&pdev->dev));
 131 +               ret = -ENODEV;
 132 +               goto err_put_hcd;
 133 +       }
 134 +       hcd->rsrc_start = res->start;
 135 +       hcd->rsrc_len   = res->end - res->start + 1;
 136 +
 137 +       if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 138 +               dev_dbg(&pdev->dev, "controller already in use\n");
 139 +               ret = -EBUSY;
 140 +               goto err_put_hcd;
 141 +       }
 142 +
 143 +       hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
 144 +       if (!hcd->regs) {
 145 +               dev_dbg(&pdev->dev, "error mapping memory\n");
 146 +               ret = -EFAULT;
 147 +               goto err_release_region;
 148 +       }
 149 +
 150 +       cns21xx_ehci_init_hc();
 151 +
 152 +       ehci = hcd_to_ehci(hcd);
 153 +
 154 +       ehci->caps = hcd->regs;
 155 +       ehci->regs = hcd->regs +
 156 +                    HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
 157 +       dbg_hcs_params(ehci, "reset");
 158 +       dbg_hcc_params(ehci, "reset");
 159 +
 160 +       /* cache this readonly data; minimize chip reads */
 161 +       ehci->hcs_params = readl(&ehci->caps->hcs_params);
 162 +       ehci->sbrn = 0x20;
 163 +
 164 +       ret = usb_add_hcd(hcd, CNS21XX_IRQ_EHCI, IRQF_DISABLED);
 165 +       if (ret)
 166 +               goto err_unmap;
 167 +
 168 +       platform_set_drvdata(pdev, hcd);
 169 +       return 0;
 170 +
 171 +err_unmap:
 172 +       iounmap(hcd->regs);
 173 +err_release_region:
 174 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 175 +err_put_hcd:
 176 +       usb_put_hcd(hcd);
 177 +       return ret;
 178 +}
 179 +
 180 +static int ehci_cns21xx_remove(struct platform_device *pdev)
 181 +{
 182 +       struct usb_hcd *hcd = platform_get_drvdata(pdev);
 183 +
 184 +       usb_remove_hcd(hcd);
 185 +       iounmap(hcd->regs);
 186 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 187 +       usb_put_hcd(hcd);
 188 +       platform_set_drvdata(pdev, NULL);
 189 +
 190 +       return 0;
 191 +}
 192 +
 193 +static struct platform_driver ehci_cns21xx_driver = {
 194 +       .probe          = ehci_cns21xx_probe,
 195 +       .remove         = ehci_cns21xx_remove,
 196 +       .shutdown       = usb_hcd_platform_shutdown,
 197 +       .driver         = {
 198 +               .owner  = THIS_MODULE,
 199 +               .name   = DRIVER_NAME,
 200 +       },
 201 +};
 202 +
 203 +MODULE_ALIAS("platform:" DRIVER_NAME);
 204 --- a/arch/arm/Kconfig
 205 +++ b/arch/arm/Kconfig
 206 @@ -376,6 +376,7 @@ config ARCH_CNS21XX
 207         select ARCH_REQUIRE_GPIOLIB
 208         select ARM_L1_CACHE_SHIFT_4
 209         select USB_ARCH_HAS_OHCI
 210 +       select USB_ARCH_HAS_EHCI
 211         help
 212           Support for Cavium Networks CNS21xx family.
 213