target/linux/cns21xx/patches-2.6.36/104-cns21xx-usb-ehci-support.patch

   1 --- /dev/null
   2 +++ b/drivers/usb/host/ehci-cns21xx.c
   3 @@ -0,0 +1,184 @@
   4 +/*
   5 + *  Copyright (c) 2008 Cavium Networks
   6 + *  Copyright (c) 2010 Gabor Juhos <juhosg@openwrt.org>
   7 + *
   8 + *  This file is free software; you can redistribute it and/or modify
   9 + *  it under the terms of the GNU General Public License, Version 2, as
  10 + *  published by the Free Software Foundation.
  11 + */
  12 +
  13 +#include <linux/platform_device.h>
  14 +#include <linux/irq.h>
  15 +
  16 +#include <mach/cns21xx.h>
  17 +
  18 +#define DRIVER_NAME    "cns21xx-ehci"
  19 +
  20 +static int cns21xx_ehci_reset(struct usb_hcd *hcd)
  21 +{
  22 +       struct ehci_hcd *ehci = hcd_to_ehci(hcd);
  23 +       int ret;
  24 +
  25 +       ret = ehci_halt(ehci);
  26 +       if (ret)
  27 +               return ret;
  28 +
  29 +       ret = ehci_init(hcd);
  30 +       if (ret)
  31 +               return ret;
  32 +
  33 +       ehci_reset(ehci);
  34 +       ehci_port_power(ehci, 0);
  35 +
  36 +       return 0;
  37 +}
  38 +
  39 +static const struct hc_driver ehci_cns21xx_hc_driver = {
  40 +       .description            = hcd_name,
  41 +        .product_desc          = DRIVER_NAME,
  42 +        .hcd_priv_size         = sizeof(struct ehci_hcd),
  43 +
  44 +       /*
  45 +        * generic hardware linkage
  46 +        */
  47 +       .irq                    = ehci_irq,
  48 +       .flags                  = HCD_MEMORY | HCD_USB2,
  49 +
  50 +       /*
  51 +        * basic lifecycle operations
  52 +        */
  53 +       .reset                  = cns21xx_ehci_reset,
  54 +       .start                  = ehci_run,
  55 +       .stop                   = ehci_stop,
  56 +       .shutdown               = ehci_shutdown,
  57 +
  58 +       /*
  59 +        * managing i/o requests and associated device resources
  60 +        */
  61 +       .urb_enqueue            = ehci_urb_enqueue,
  62 +       .urb_dequeue            = ehci_urb_dequeue,
  63 +       .endpoint_disable       = ehci_endpoint_disable,
  64 +       .endpoint_reset         = ehci_endpoint_reset,
  65 +
  66 +       /*
  67 +        * scheduling support
  68 +        */
  69 +       .get_frame_number       = ehci_get_frame,
  70 +
  71 +       /*
  72 +        * root hub support
  73 +        */
  74 +       .hub_status_data        = ehci_hub_status_data,
  75 +       .hub_control            = ehci_hub_control,
  76 +       .relinquish_port        = ehci_relinquish_port,
  77 +       .port_handed_over       = ehci_port_handed_over,
  78 +
  79 +       .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
  80 +};
  81 +
  82 +static void cns21xx_ehci_init_hc(void)
  83 +{
  84 +       __raw_writel(0x106, CNS21XX_EHCI_CONFIG_BASE_VIRT + 0x04);
  85 +       __raw_writel((3 << 5) | 0x2000, CNS21XX_EHCI_CONFIG_BASE_VIRT + 0x40);
  86 +       msleep(100);
  87 +}
  88 +
  89 +static int ehci_cns21xx_probe(struct platform_device *pdev)
  90 +{
  91 +       struct usb_hcd *hcd;
  92 +       struct ehci_hcd *ehci;
  93 +       struct resource *res;
  94 +       int irq;
  95 +       int ret;
  96 +
  97 +       if (usb_disabled())
  98 +               return -ENODEV;
  99 +
 100 +       res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 101 +       if (!res) {
 102 +               dev_dbg(&pdev->dev, "no IRQ specified for %s\n",
 103 +                       dev_name(&pdev->dev));
 104 +               return -ENODEV;
 105 +       }
 106 +       irq = res->start;
 107 +
 108 +       hcd = usb_create_hcd(&ehci_cns21xx_hc_driver, &pdev->dev,
 109 +                            dev_name(&pdev->dev));
 110 +       if (!hcd)
 111 +               return -ENOMEM;
 112 +
 113 +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 114 +       if (!res) {
 115 +               dev_dbg(&pdev->dev, "no base address specified for %s\n",
 116 +                       dev_name(&pdev->dev));
 117 +               ret = -ENODEV;
 118 +               goto err_put_hcd;
 119 +       }
 120 +       hcd->rsrc_start = res->start;
 121 +       hcd->rsrc_len   = res->end - res->start + 1;
 122 +
 123 +       if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
 124 +               dev_dbg(&pdev->dev, "controller already in use\n");
 125 +               ret = -EBUSY;
 126 +               goto err_put_hcd;
 127 +       }
 128 +
 129 +       hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
 130 +       if (!hcd->regs) {
 131 +               dev_dbg(&pdev->dev, "error mapping memory\n");
 132 +               ret = -EFAULT;
 133 +               goto err_release_region;
 134 +       }
 135 +
 136 +       cns21xx_ehci_init_hc();
 137 +
 138 +       ehci = hcd_to_ehci(hcd);
 139 +
 140 +       ehci->caps = hcd->regs;
 141 +       ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
 142 +       dbg_hcs_params(ehci, "reset");
 143 +       dbg_hcc_params(ehci, "reset");
 144 +
 145 +       /* cache this readonly data; minimize chip reads */
 146 +       ehci->hcs_params = readl(&ehci->caps->hcs_params);
 147 +       ehci->sbrn = 0x20;
 148 +
 149 +       ret = usb_add_hcd(hcd, CNS21XX_IRQ_EHCI, IRQF_DISABLED);
 150 +       if (ret)
 151 +               goto err_unmap;
 152 +
 153 +       platform_set_drvdata(pdev, hcd);
 154 +       return 0;
 155 +
 156 +err_unmap:
 157 +       iounmap(hcd->regs);
 158 +err_release_region:
 159 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 160 +err_put_hcd:
 161 +       usb_put_hcd(hcd);
 162 +       return ret;
 163 +}
 164 +
 165 +static int ehci_cns21xx_remove(struct platform_device *pdev)
 166 +{
 167 +       struct usb_hcd *hcd = platform_get_drvdata(pdev);
 168 +
 169 +       usb_remove_hcd(hcd);
 170 +       iounmap(hcd->regs);
 171 +       release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 172 +       usb_put_hcd(hcd);
 173 +       platform_set_drvdata(pdev, NULL);
 174 +
 175 +       return 0;
 176 +}
 177 +
 178 +static struct platform_driver ehci_cns21xx_driver = {
 179 +       .probe          = ehci_cns21xx_probe,
 180 +       .remove         = ehci_cns21xx_remove,
 181 +       .driver         = {
 182 +               .owner  = THIS_MODULE,
 183 +               .name   = DRIVER_NAME,
 184 +       },
 185 +};
 186 +
 187 +MODULE_ALIAS("platform:" DRIVER_NAME);
 188 --- a/drivers/usb/host/ehci-hcd.c
 189 +++ b/drivers/usb/host/ehci-hcd.c
 190 @@ -1197,6 +1197,11 @@ MODULE_LICENSE ("GPL");
 191  #define        PLATFORM_DRIVER         ehci_atmel_driver
 192  #endif
 193
 194 +#ifdef CONFIG_ARCH_CNS21XX
 195 +#include "ehci-cns21xx.c"
 196 +#define PLATFORM_DRIVER                ehci_cns21xx_driver
 197 +#endif
 198 +
 199  #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
 200      !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
 201      !defined(XILINX_OF_PLATFORM_DRIVER)
 202 --- a/arch/arm/Kconfig
 203 +++ b/arch/arm/Kconfig
 204 @@ -300,6 +300,7 @@ config ARCH_CNS21XX
 205         select ARCH_REQUIRE_GPIOLIB
 206         select ARM_L1_CACHE_SHIFT_4
 207         select USB_ARCH_HAS_OHCI
 208 +       select USB_ARCH_HAS_EHCI
 209         help
 210           Support for Cavium Networks CNS21xx family.
 211