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 #define DA8XX_USB0_BASE         0x01e00000
  18 #define DA8XX_USB1_BASE         0x01e25000
  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         /* OTG requires a Mini-AB connector */
  46         .mode           = MUSB_OTG,
  47         .clock          = "usb",
  48         .config         = &musb_config,
  49 };
  50
  51 static struct resource usb_resources[] = {
  52         {
  53                 /* physical address */
  54                 .start          = DAVINCI_USB_OTG_BASE,
  55                 .end            = DAVINCI_USB_OTG_BASE + 0x5ff,
  56                 .flags          = IORESOURCE_MEM,
  57         },
  58         {
  59                 .start          = IRQ_USBINT,
  60                 .flags          = IORESOURCE_IRQ,
  61                 .name           = "mc"
  62         },
  63         {
  64                 /* placeholder for the dedicated CPPI IRQ */
  65                 .flags          = IORESOURCE_IRQ,
  66                 .name           = "dma"
  67         },
  68 };
  69
  70 static u64 usb_dmamask = DMA_BIT_MASK(32);
  71
  72 static struct platform_device usb_dev = {
  73         .name           = "musb-davinci",
  74         .id             = -1,
  75         .dev = {
  76                 .platform_data          = &usb_data,
  77                 .dma_mask               = &usb_dmamask,
  78                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  79         },
  80         .resource       = usb_resources,
  81         .num_resources  = ARRAY_SIZE(usb_resources),
  82 };
  83
  84 void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
  85 {
  86         usb_data.power = mA > 510 ? 255 : mA / 2;
  87         usb_data.potpgt = (potpgt_ms + 1) / 2;
  88
  89         if (cpu_is_davinci_dm646x()) {
  90                 /* Override the defaults as DM6467 uses different IRQs. */
  91                 usb_dev.resource[1].start = IRQ_DM646X_USBINT;
  92                 usb_dev.resource[2].start = IRQ_DM646X_USBDMAINT;
  93         } else  /* other devices don't have dedicated CPPI IRQ */
  94                 usb_dev.num_resources = 2;
  95
  96         platform_device_register(&usb_dev);
  97 }
  98
  99 #ifdef CONFIG_ARCH_DAVINCI_DA8XX
 100 static struct resource da8xx_usb20_resources[] = {
 101         {
 102                 .start          = DA8XX_USB0_BASE,
 103                 .end            = DA8XX_USB0_BASE + SZ_64K - 1,
 104                 .flags          = IORESOURCE_MEM,
 105         },
 106         {
 107                 .start          = IRQ_DA8XX_USB_INT,
 108                 .flags          = IORESOURCE_IRQ,
 109                 .name           = "mc",
 110         },
 111 };
 112
 113 int __init da8xx_register_usb20(unsigned mA, unsigned potpgt)
 114 {
 115         usb_data.clock  = "usb20";
 116         usb_data.power  = mA > 510 ? 255 : mA / 2;
 117         usb_data.potpgt = (potpgt + 1) / 2;
 118
 119         usb_dev.resource = da8xx_usb20_resources;
 120         usb_dev.num_resources = ARRAY_SIZE(da8xx_usb20_resources);
 121         usb_dev.name = "musb-da8xx";
 122
 123         return platform_device_register(&usb_dev);
 124 }
 125 #endif  /* CONFIG_DAVINCI_DA8XX */
 126
 127 #else
 128
 129 void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
 130 {
 131 }
 132
 133 #ifdef CONFIG_ARCH_DAVINCI_DA8XX
 134 int __init da8xx_register_usb20(unsigned mA, unsigned potpgt)
 135 {
 136         return 0;
 137 }
 138 #endif
 139
 140 #endif  /* CONFIG_USB_MUSB_HDRC */
 141
 142 #ifdef  CONFIG_ARCH_DAVINCI_DA8XX
 143 static struct resource da8xx_usb11_resources[] = {
 144         [0] = {
 145                 .start  = DA8XX_USB1_BASE,
 146                 .end    = DA8XX_USB1_BASE + SZ_4K - 1,
 147                 .flags  = IORESOURCE_MEM,
 148         },
 149         [1] = {
 150                 .start  = IRQ_DA8XX_IRQN,
 151                 .end    = IRQ_DA8XX_IRQN,
 152                 .flags  = IORESOURCE_IRQ,
 153         },
 154 };
 155
 156 static u64 da8xx_usb11_dma_mask = DMA_BIT_MASK(32);
 157
 158 static struct platform_device da8xx_usb11_device = {
 159         .name           = "ohci",
 160         .id             = 0,
 161         .dev = {
 162                 .dma_mask               = &da8xx_usb11_dma_mask,
 163                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 164         },
 165         .num_resources  = ARRAY_SIZE(da8xx_usb11_resources),
 166         .resource       = da8xx_usb11_resources,
 167 };
 168
 169 int __init da8xx_register_usb11(struct da8xx_ohci_root_hub *pdata)
 170 {
 171         da8xx_usb11_device.dev.platform_data = pdata;
 172         return platform_device_register(&da8xx_usb11_device);
 173 }
 174 #endif  /* CONFIG_DAVINCI_DA8XX */