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 #include <mach/irqs.h>
  16
  17 #define DAVINCI_USB_OTG_BASE 0x01C64000
  18
  19 #if defined(CONFIG_USB_MUSB_HDRC) || defined(CONFIG_USB_MUSB_HDRC_MODULE)
  20 static struct musb_hdrc_eps_bits musb_eps[] = {
  21         { "ep1_tx", 8, },
  22         { "ep1_rx", 8, },
  23         { "ep2_tx", 8, },
  24         { "ep2_rx", 8, },
  25         { "ep3_tx", 5, },
  26         { "ep3_rx", 5, },
  27         { "ep4_tx", 5, },
  28         { "ep4_rx", 5, },
  29 };
  30
  31 static struct musb_hdrc_config musb_config = {
  32         .multipoint     = true,
  33         .dyn_fifo       = true,
  34         .soft_con       = true,
  35         .dma            = true,
  36
  37         .num_eps        = 5,
  38         .dma_channels   = 8,
  39         .ram_bits       = 10,
  40         .eps_bits       = musb_eps,
  41 };
  42
  43 static struct musb_hdrc_platform_data usb_data = {
  44 #if defined(CONFIG_USB_MUSB_OTG)
  45         /* OTG requires a Mini-AB connector */
  46         .mode           = MUSB_OTG,
  47 #elif defined(CONFIG_USB_MUSB_PERIPHERAL)
  48         .mode           = MUSB_PERIPHERAL,
  49 #elif defined(CONFIG_USB_MUSB_HOST)
  50         .mode           = MUSB_HOST,
  51 #endif
  52         .clock          = "usb",
  53         .config         = &musb_config,
  54 };
  55
  56 static struct resource usb_resources[] = {
  57         {
  58                 /* physical address */
  59                 .start          = DAVINCI_USB_OTG_BASE,
  60                 .end            = DAVINCI_USB_OTG_BASE + 0x5ff,
  61                 .flags          = IORESOURCE_MEM,
  62         },
  63         {
  64                 .start          = IRQ_USBINT,
  65                 .flags          = IORESOURCE_IRQ,
  66         },
  67 };
  68
  69 static u64 usb_dmamask = DMA_BIT_MASK(32);
  70
  71 static struct platform_device usb_dev = {
  72         .name           = "musb_hdrc",
  73         .id             = -1,
  74         .dev = {
  75                 .platform_data          = &usb_data,
  76                 .dma_mask               = &usb_dmamask,
  77                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  78         },
  79         .resource       = usb_resources,
  80         .num_resources  = ARRAY_SIZE(usb_resources),
  81 };
  82
  83 void __init setup_usb(unsigned mA, unsigned potpgt_msec)
  84 {
  85         usb_data.power = mA / 2;
  86         usb_data.potpgt = potpgt_msec / 2;
  87         platform_device_register(&usb_dev);
  88 }
  89
  90 #else
  91
  92 void __init setup_usb(unsigned mA, unsigned potpgt_msec)
  93 {
  94 }
  95
  96 #endif  /* CONFIG_USB_MUSB_HDRC */
  97