target/linux/brcm63xx/files-2.6.30/drivers/usb/host/ohci-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/clk.h>
  11 #include <linux/platform_device.h>
  12 #include <bcm63xx_cpu.h>
  13 #include <bcm63xx_regs.h>
  14 #include <bcm63xx_io.h>
  15
  16 static struct clk *usb_host_clock;
  17
  18 static int __devinit ohci_bcm63xx_start(struct usb_hcd *hcd)
  19 {
  20         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
  21         int ret;
  22
  23         ret = ohci_init(ohci);
  24         if (ret < 0)
  25                 return ret;
  26
  27         /* FIXME: autodetected port 2 is shared with USB slave */
  28
  29         ret = ohci_run(ohci);
  30         if (ret < 0) {
  31                 err("can't start %s", hcd->self.bus_name);
  32                 ohci_stop(hcd);
  33                 return ret;
  34         }
  35         return 0;
  36 }
  37
  38 static const struct hc_driver ohci_bcm63xx_hc_driver = {
  39         .description =          hcd_name,
  40         .product_desc =         "BCM63XX integrated OHCI controller",
  41         .hcd_priv_size =        sizeof(struct ohci_hcd),
  42
  43         .irq =                  ohci_irq,
  44         .flags =                HCD_USB11 | HCD_MEMORY,
  45         .start =                ohci_bcm63xx_start,
  46         .stop =                 ohci_stop,
  47         .shutdown =             ohci_shutdown,
  48         .urb_enqueue =          ohci_urb_enqueue,
  49         .urb_dequeue =          ohci_urb_dequeue,
  50         .endpoint_disable =     ohci_endpoint_disable,
  51         .get_frame_number =     ohci_get_frame,
  52         .hub_status_data =      ohci_hub_status_data,
  53         .hub_control =          ohci_hub_control,
  54         .start_port_reset =     ohci_start_port_reset,
  55 };
  56
  57 static int __devinit ohci_hcd_bcm63xx_drv_probe(struct platform_device *pdev)
  58 {
  59         struct resource *res_mem, *res_irq;
  60         struct usb_hcd *hcd;
  61         struct ohci_hcd *ohci;
  62         u32 reg;
  63         int ret;
  64
  65         res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  66         res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
  67         if (!res_mem || !res_irq)
  68                 return -ENODEV;
  69
  70         if (BCMCPU_IS_6348()) {
  71                 struct clk *clk;
  72                 /* enable USB host clock */
  73                 clk = clk_get(&pdev->dev, "usbh");
  74                 if (IS_ERR(clk))
  75                         return -ENODEV;
  76
  77                 clk_enable(clk);
  78                 usb_host_clock = clk;
  79                 bcm_rset_writel(RSET_OHCI_PRIV, 0, OHCI_PRIV_REG);
  80
  81         } else if (BCMCPU_IS_6358()) {
  82                 reg = bcm_rset_readl(RSET_USBH_PRIV, USBH_PRIV_SWAP_REG);
  83                 reg &= ~USBH_PRIV_SWAP_OHCI_ENDN_MASK;
  84                 reg |= USBH_PRIV_SWAP_OHCI_DATA_MASK;
  85                 bcm_rset_writel(RSET_USBH_PRIV, reg, USBH_PRIV_SWAP_REG);
  86                 /* don't ask... */
  87                 bcm_rset_writel(RSET_USBH_PRIV, 0x1c0020, USBH_PRIV_TEST_REG);
  88         } else
  89                 return 0;
  90
  91         hcd = usb_create_hcd(&ohci_bcm63xx_hc_driver, &pdev->dev, "bcm63xx");
  92         if (!hcd)
  93                 return -ENOMEM;
  94         hcd->rsrc_start = res_mem->start;
  95         hcd->rsrc_len = res_mem->end - res_mem->start + 1;
  96
  97         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
  98                 pr_debug("request_mem_region failed\n");
  99                 ret = -EBUSY;
 100                 goto out;
 101         }
 102
 103         hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
 104         if (!hcd->regs) {
 105                 pr_debug("ioremap failed\n");
 106                 ret = -EIO;
 107                 goto out1;
 108         }
 109
 110         ohci = hcd_to_ohci(hcd);
 111         ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC |
 112                 OHCI_QUIRK_FRAME_NO;
 113         ohci_hcd_init(ohci);
 114
 115         ret = usb_add_hcd(hcd, res_irq->start, IRQF_DISABLED);
 116         if (ret)
 117                 goto out2;
 118
 119         platform_set_drvdata(pdev, hcd);
 120         return 0;
 121
 122 out2:
 123         iounmap(hcd->regs);
 124 out1:
 125         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 126 out:
 127         usb_put_hcd(hcd);
 128         return ret;
 129 }
 130
 131 static int __devexit ohci_hcd_bcm63xx_drv_remove(struct platform_device *pdev)
 132 {
 133         struct usb_hcd *hcd;
 134
 135         hcd = platform_get_drvdata(pdev);
 136         usb_remove_hcd(hcd);
 137         iounmap(hcd->regs);
 138         usb_put_hcd(hcd);
 139         release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
 140         if (usb_host_clock) {
 141                 clk_disable(usb_host_clock);
 142                 clk_put(usb_host_clock);
 143         }
 144         platform_set_drvdata(pdev, NULL);
 145         return 0;
 146 }
 147
 148 static struct platform_driver ohci_hcd_bcm63xx_driver = {
 149         .probe          = ohci_hcd_bcm63xx_drv_probe,
 150         .remove         = __devexit_p(ohci_hcd_bcm63xx_drv_remove),
 151         .shutdown       = usb_hcd_platform_shutdown,
 152         .driver         = {
 153                 .name   = "bcm63xx_ohci",
 154                 .owner  = THIS_MODULE,
 155                 .bus    = &platform_bus_type
 156         },
 157 };
 158
 159 MODULE_ALIAS("platform:bcm63xx_ohci");