arch/arm/mach-davinci/usb.c

   1 /*
   2  * USB
   3  */
   4 #include <linux/kernel.h>
   5 #include <linux/module.h>
   6 #include <linux/init.h>
   7 #include <linux/platform_device.h>
   8 #include <linux/dma-mapping.h>
   9
  10 #include <linux/usb/musb.h>
  11 #include <linux/usb/otg.h>
  12
  13 #include <mach/common.h>
  14 #include <mach/hardware.h>
  15
  16 #if defined(CONFIG_USB_MUSB_HDRC) || defined(CONFIG_USB_MUSB_HDRC_MODULE)
  17 static struct musb_hdrc_eps_bits musb_eps[] = {
  18         { "ep1_tx", 8, },
  19         { "ep1_rx", 8, },
  20         { "ep2_tx", 8, },
  21         { "ep2_rx", 8, },
  22         { "ep3_tx", 5, },
  23         { "ep3_rx", 5, },
  24         { "ep4_tx", 5, },
  25         { "ep4_rx", 5, },
  26 };
  27
  28 static struct musb_hdrc_config musb_config = {
  29         .multipoint     = true,
  30         .dyn_fifo       = true,
  31         .soft_con       = true,
  32         .dma            = true,
  33
  34         .num_eps        = 5,
  35         .dma_channels   = 8,
  36         .ram_bits       = 10,
  37         .eps_bits       = musb_eps,
  38 };
  39
  40 static struct musb_hdrc_platform_data usb_data = {
  41 #if defined(CONFIG_USB_MUSB_OTG)
  42         /* OTG requires a Mini-AB connector */
  43         .mode           = MUSB_OTG,
  44 #elif defined(CONFIG_USB_MUSB_PERIPHERAL)
  45         .mode           = MUSB_PERIPHERAL,
  46 #elif defined(CONFIG_USB_MUSB_HOST)
  47         .mode           = MUSB_HOST,
  48 #endif
  49         .config         = &musb_config,
  50 };
  51
  52 static struct resource usb_resources[] = {
  53         {
  54                 /* physical address */
  55                 .start          = DAVINCI_USB_OTG_BASE,
  56                 .end            = DAVINCI_USB_OTG_BASE + 0x5ff,
  57                 .flags          = IORESOURCE_MEM,
  58         },
  59         {
  60                 .start          = IRQ_USBINT,
  61                 .flags          = IORESOURCE_IRQ,
  62         },
  63 };
  64
  65 static u64 usb_dmamask = DMA_32BIT_MASK;
  66
  67 static struct platform_device usb_dev = {
  68         .name           = "musb_hdrc",
  69         .id             = -1,
  70         .dev = {
  71                 .platform_data          = &usb_data,
  72                 .dma_mask               = &usb_dmamask,
  73                 .coherent_dma_mask      = DMA_32BIT_MASK,
  74         },
  75         .resource       = usb_resources,
  76         .num_resources  = ARRAY_SIZE(usb_resources),
  77 };
  78
  79 #ifdef CONFIG_USB_MUSB_OTG
  80
  81 static struct otg_transceiver *xceiv;
  82
  83 struct otg_transceiver *otg_get_transceiver(void)
  84 {
  85         if (xceiv)
  86                 get_device(xceiv->dev);
  87         return xceiv;
  88 }
  89 EXPORT_SYMBOL(otg_get_transceiver);
  90
  91 int otg_set_transceiver(struct otg_transceiver *x)
  92 {
  93         if (xceiv && x)
  94                 return -EBUSY;
  95         xceiv = x;
  96         return 0;
  97 }
  98 EXPORT_SYMBOL(otg_set_transceiver);
  99
 100 #endif
 101
 102 void __init setup_usb(unsigned mA, unsigned potpgt_msec)
 103 {
 104         usb_data.power = mA / 2;
 105         usb_data.potpgt = potpgt_msec / 2;
 106         platform_device_register(&usb_dev);
 107 }
 108
 109 #else
 110
 111 void __init setup_usb(unsigned mA, unsigned potpgt_msec)
 112 {
 113 }
 114
 115 #endif  /* CONFIG_USB_MUSB_HDRC */
 116