arch/arm/mach-davinci/usb.c

   1 /*
   2  * USB
   3  */
   4 #include <linux/init.h>
   5 #include <linux/platform_device.h>
   6 #include <linux/dma-mapping.h>
   7
   8 #include <linux/usb/musb.h>
   9
  10 #include <mach/common.h>
  11 #include <mach/irqs.h>
  12 #include <mach/cputype.h>
  13 #include <linux/platform_data/usb-davinci.h>
  14
  15 #define DAVINCI_USB_OTG_BASE    0x01c64000
  16
  17 #if IS_ENABLED(CONFIG_USB_MUSB_HDRC)
  18 static struct musb_hdrc_config musb_config = {
  19         .multipoint     = true,
  20
  21         .num_eps        = 5,
  22         .ram_bits       = 10,
  23 };
  24
  25 static struct musb_hdrc_platform_data usb_data = {
  26         /* OTG requires a Mini-AB connector */
  27         .mode           = MUSB_OTG,
  28         .clock          = "usb",
  29         .config         = &musb_config,
  30 };
  31
  32 static struct resource usb_resources[] = {
  33         {
  34                 /* physical address */
  35                 .start          = DAVINCI_USB_OTG_BASE,
  36                 .end            = DAVINCI_USB_OTG_BASE + 0x5ff,
  37                 .flags          = IORESOURCE_MEM,
  38         },
  39         {
  40                 .start          = IRQ_USBINT,
  41                 .flags          = IORESOURCE_IRQ,
  42                 .name           = "mc"
  43         },
  44         {
  45                 /* placeholder for the dedicated CPPI IRQ */
  46                 .flags          = IORESOURCE_IRQ,
  47                 .name           = "dma"
  48         },
  49 };
  50
  51 static u64 usb_dmamask = DMA_BIT_MASK(32);
  52
  53 static struct platform_device usb_dev = {
  54         .name           = "musb-davinci",
  55         .id             = -1,
  56         .dev = {
  57                 .platform_data          = &usb_data,
  58                 .dma_mask               = &usb_dmamask,
  59                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  60         },
  61         .resource       = usb_resources,
  62         .num_resources  = ARRAY_SIZE(usb_resources),
  63 };
  64
  65 void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
  66 {
  67         usb_data.power = mA > 510 ? 255 : mA / 2;
  68         usb_data.potpgt = (potpgt_ms + 1) / 2;
  69
  70         if (cpu_is_davinci_dm646x()) {
  71                 /* Override the defaults as DM6467 uses different IRQs. */
  72                 usb_dev.resource[1].start = IRQ_DM646X_USBINT;
  73                 usb_dev.resource[2].start = IRQ_DM646X_USBDMAINT;
  74         } else  /* other devices don't have dedicated CPPI IRQ */
  75                 usb_dev.num_resources = 2;
  76
  77         platform_device_register(&usb_dev);
  78 }
  79
  80 #else
  81
  82 void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
  83 {
  84 }
  85
  86 #endif  /* CONFIG_USB_MUSB_HDRC */