release/src-rt-6.x.4708/linux/linux-2.6.36/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 <mach/usb.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 #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 davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
  89 {
  90         usb_data.power = mA > 510 ? 255 : mA / 2;
  91         usb_data.potpgt = (potpgt_ms + 1) / 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 #ifdef CONFIG_ARCH_DAVINCI_DA8XX
 104 static struct resource da8xx_usb20_resources[] = {
 105         {
 106                 .start          = DA8XX_USB0_BASE,
 107                 .end            = DA8XX_USB0_BASE + SZ_64K - 1,
 108                 .flags          = IORESOURCE_MEM,
 109         },
 110         {
 111                 .start          = IRQ_DA8XX_USB_INT,
 112                 .flags          = IORESOURCE_IRQ,
 113         },
 114 };
 115
 116 int __init da8xx_register_usb20(unsigned mA, unsigned potpgt)
 117 {
 118         usb_data.clock  = "usb20";
 119         usb_data.power  = mA > 510 ? 255 : mA / 2;
 120         usb_data.potpgt = (potpgt + 1) / 2;
 121
 122         usb_dev.resource = da8xx_usb20_resources;
 123         usb_dev.num_resources = ARRAY_SIZE(da8xx_usb20_resources);
 124
 125         return platform_device_register(&usb_dev);
 126 }
 127 #endif  /* CONFIG_DAVINCI_DA8XX */
 128
 129 #else
 130
 131 void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
 132 {
 133 }
 134
 135 #ifdef CONFIG_ARCH_DAVINCI_DA8XX
 136 int __init da8xx_register_usb20(unsigned mA, unsigned potpgt)
 137 {
 138         return 0;
 139 }
 140 #endif
 141
 142 #endif  /* CONFIG_USB_MUSB_HDRC */
 143
 144 #ifdef  CONFIG_ARCH_DAVINCI_DA8XX
 145 static struct resource da8xx_usb11_resources[] = {
 146         [0] = {
 147                 .start  = DA8XX_USB1_BASE,
 148                 .end    = DA8XX_USB1_BASE + SZ_4K - 1,
 149                 .flags  = IORESOURCE_MEM,
 150         },
 151         [1] = {
 152                 .start  = IRQ_DA8XX_IRQN,
 153                 .end    = IRQ_DA8XX_IRQN,
 154                 .flags  = IORESOURCE_IRQ,
 155         },
 156 };
 157
 158 static u64 da8xx_usb11_dma_mask = DMA_BIT_MASK(32);
 159
 160 static struct platform_device da8xx_usb11_device = {
 161         .name           = "ohci",
 162         .id             = 0,
 163         .dev = {
 164                 .dma_mask               = &da8xx_usb11_dma_mask,
 165                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 166         },
 167         .num_resources  = ARRAY_SIZE(da8xx_usb11_resources),
 168         .resource       = da8xx_usb11_resources,
 169 };
 170
 171 int __init da8xx_register_usb11(struct da8xx_ohci_root_hub *pdata)
 172 {
 173         da8xx_usb11_device.dev.platform_data = pdata;
 174         return platform_device_register(&da8xx_usb11_device);
 175 }
 176 #endif  /* CONFIG_DAVINCI_DA8XX */