target/linux/brcm63xx/files/drivers/usb/host/ehci-bcm63xx.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/platform_device.h>
  11 #include <bcm63xx_cpu.h>
  12 #include <bcm63xx_regs.h>
  13 #include <bcm63xx_io.h>
  14
  15 static int ehci_bcm63xx_setup(struct usb_hcd *hcd)
  16 {
  17         struct ehci_hcd *ehci = hcd_to_ehci(hcd);
  18         int retval;
  19
  20         retval = ehci_halt(ehci);
  21         if (retval)
  22                 return retval;
  23
  24         retval = ehci_init(hcd);
  25         if (retval)
  26                 return retval;
  27
  28         hcd->has_tt = 1;
  29         ehci_reset(ehci);
  30         ehci_port_power(ehci, 0);
  31
  32         return retval;
  33 }
  34
  35
  36 static const struct hc_driver ehci_bcm63xx_hc_driver = {
  37         .description =          hcd_name,
  38         .product_desc =         "BCM63XX integrated EHCI controller",
  39         .hcd_priv_size =        sizeof(struct ehci_hcd),
  40
  41         .irq =                  ehci_irq,
  42         .flags =                HCD_MEMORY | HCD_USB2,
  43
  44         .reset =                ehci_bcm63xx_setup,
  45         .start =                ehci_run,
  46         .stop =                 ehci_stop,
  47         .shutdown =             ehci_shutdown,
  48
  49         .urb_enqueue =          ehci_urb_enqueue,
  50         .urb_dequeue =          ehci_urb_dequeue,
  51         .endpoint_disable =     ehci_endpoint_disable,
  52
  53         .get_frame_number =     ehci_get_frame,
  54
  55         .hub_status_data =      ehci_hub_status_data,
  56         .hub_control =          ehci_hub_control,
  57         .bus_suspend =          ehci_bus_suspend,
  58         .bus_resume =           ehci_bus_resume,
  59         .relinquish_port =      ehci_relinquish_port,
  60         .port_handed_over =     ehci_port_handed_over,
  61 };
  62
  63 static int __devinit ehci_hcd_bcm63xx_drv_probe(struct platform_device *pdev)
  64 {
  65         struct resource *res_mem, *res_irq;
  66         struct usb_hcd *hcd;
  67         struct ehci_hcd *ehci;
  68         u32 reg;
  69         int ret;
  70
  71         res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  72         res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
  73         if (!res_mem || !res_irq)
  74                 return -ENODEV;
  75
  76         reg = bcm_rset_readl(RSET_USBH_PRIV, USBH_PRIV_SWAP_REG);
  77         reg &= ~USBH_PRIV_SWAP_EHCI_DATA_MASK;
  78         reg |= USBH_PRIV_SWAP_EHCI_ENDN_MASK;
  79         bcm_rset_writel(RSET_USBH_PRIV, reg, USBH_PRIV_SWAP_REG);
  80
  81         /* don't ask... */
  82         bcm_rset_writel(RSET_USBH_PRIV, 0x1c0020, USBH_PRIV_TEST_REG);
  83
  84         hcd = usb_create_hcd(&ehci_bcm63xx_hc_driver, &pdev->dev, "bcm63xx");
  85         if (!hcd)
  86                 return -ENOMEM;
  87         hcd->rsrc_start = res_mem->start;
  88         hcd->rsrc_len = res_mem->end - res_mem->start + 1;
  89
  90         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
  91                 pr_debug("request_mem_region failed\n");
  92                 ret = -EBUSY;
  93                 goto out;
  94         }
  95
  96         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
  97         if (!hcd->regs) {
  98                 pr_debug("ioremap failed\n");
  99                 ret = -EIO;
 100                 goto out1;
 101         }
 102
 103         ehci = hcd_to_ehci(hcd);
 104         ehci->big_endian_mmio = 1;
 105         ehci->big_endian_desc = 0;
 106         ehci->caps = hcd->regs;
 107         ehci->regs = hcd->regs +
 108                 HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
 109         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 110         ehci->sbrn = 0x20;
 111
 112         ret = usb_add_hcd(hcd, res_irq->start, IRQF_DISABLED);
 113         if (ret)
 114                 goto out2;
 115
 116         platform_set_drvdata(pdev, hcd);
 117         return 0;
 118
 119 out2:
 120         iounmap(hcd->regs);
 121 out1:
 122         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 123 out:
 124         usb_put_hcd(hcd);
 125         return ret;
 126 }
 127
 128 static int __devexit ehci_hcd_bcm63xx_drv_remove(struct platform_device *pdev)
 129 {
 130         struct usb_hcd *hcd;
 131
 132         hcd = platform_get_drvdata(pdev);
 133         usb_remove_hcd(hcd);
 134         iounmap(hcd->regs);
 135         usb_put_hcd(hcd);
 136         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 137         platform_set_drvdata(pdev, NULL);
 138         return 0;
 139 }
 140
 141 static struct platform_driver ehci_hcd_bcm63xx_driver = {
 142         .probe          = ehci_hcd_bcm63xx_drv_probe,
 143         .remove         = __devexit_p(ehci_hcd_bcm63xx_drv_remove),
 144         .shutdown       = usb_hcd_platform_shutdown,
 145         .driver         = {
 146                 .name   = "bcm63xx_ehci",
 147                 .owner  = THIS_MODULE,
 148                 .bus    = &platform_bus_type
 149         },
 150 };
 151
 152 MODULE_ALIAS("platform:bcm63xx_ehci");