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 #include <mach/cputype.h>
  17
  18 #define DAVINCI_USB_OTG_BASE 0x01C64000
  19
  20 #if defined(CONFIG_USB_MUSB_HDRC) || defined(CONFIG_USB_MUSB_HDRC_MODULE)
  21 static struct musb_hdrc_eps_bits musb_eps[] = {
  22         { "ep1_tx", 8, },
  23         { "ep1_rx", 8, },
  24         { "ep2_tx", 8, },
  25         { "ep2_rx", 8, },
  26         { "ep3_tx", 5, },
  27         { "ep3_rx", 5, },
  28         { "ep4_tx", 5, },
  29         { "ep4_rx", 5, },
  30 };
  31
  32 static struct musb_hdrc_config musb_config = {
  33         .multipoint     = true,
  34         .dyn_fifo       = true,
  35         .soft_con       = true,
  36         .dma            = true,
  37
  38         .num_eps        = 5,
  39         .dma_channels   = 8,
  40         .ram_bits       = 10,
  41         .eps_bits       = musb_eps,
  42 };
  43
  44 static struct musb_hdrc_platform_data usb_data = {
  45 #if defined(CONFIG_USB_MUSB_OTG)
  46         /* OTG requires a Mini-AB connector */
  47         .mode           = MUSB_OTG,
  48 #elif defined(CONFIG_USB_MUSB_PERIPHERAL)
  49         .mode           = MUSB_PERIPHERAL,
  50 #elif defined(CONFIG_USB_MUSB_HOST)
  51         .mode           = MUSB_HOST,
  52 #endif
  53         .clock          = "usb",
  54         .config         = &musb_config,
  55 };
  56
  57 static struct resource usb_resources[] = {
  58         {
  59                 /* physical address */
  60                 .start          = DAVINCI_USB_OTG_BASE,
  61                 .end            = DAVINCI_USB_OTG_BASE + 0x5ff,
  62                 .flags          = IORESOURCE_MEM,
  63         },
  64         {
  65                 .start          = IRQ_USBINT,
  66                 .flags          = IORESOURCE_IRQ,
  67         },
  68         {
  69                 /* placeholder for the dedicated CPPI IRQ */
  70                 .flags          = IORESOURCE_IRQ,
  71         },
  72 };
  73
  74 static u64 usb_dmamask = DMA_BIT_MASK(32);
  75
  76 static struct platform_device usb_dev = {
  77         .name           = "musb_hdrc",
  78         .id             = -1,
  79         .dev = {
  80                 .platform_data          = &usb_data,
  81                 .dma_mask               = &usb_dmamask,
  82                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  83         },
  84         .resource       = usb_resources,
  85         .num_resources  = ARRAY_SIZE(usb_resources),
  86 };
  87
  88 void __init setup_usb(unsigned mA, unsigned potpgt_msec)
  89 {
  90         usb_data.power = mA / 2;
  91         usb_data.potpgt = potpgt_msec / 2;
  92
  93         if (cpu_is_davinci_dm646x()) {
  94                 /* Override the defaults as DM6467 uses different IRQs. */
  95                 usb_dev.resource[1].start = IRQ_DM646X_USBINT;
  96                 usb_dev.resource[2].start = IRQ_DM646X_USBDMAINT;
  97         } else  /* other devices don't have dedicated CPPI IRQ */
  98                 usb_dev.num_resources = 2;
  99
 100         platform_device_register(&usb_dev);
 101 }
 102
 103 #else
 104
 105 void __init setup_usb(unsigned mA, unsigned potpgt_msec)
 106 {
 107 }
 108
 109 #endif  /* CONFIG_USB_MUSB_HDRC */
 110