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                 .name           = "mc"
  68         },
  69         {
  70                 /* placeholder for the dedicated CPPI IRQ */
  71                 .flags          = IORESOURCE_IRQ,
  72                 .name           = "dma"
  73         },
  74 };
  75
  76 static u64 usb_dmamask = DMA_BIT_MASK(32);
  77
  78 static struct platform_device usb_dev = {
  79         .name           = "musb-davinci",
  80         .id             = -1,
  81         .dev = {
  82                 .platform_data          = &usb_data,
  83                 .dma_mask               = &usb_dmamask,
  84                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  85         },
  86         .resource       = usb_resources,
  87         .num_resources  = ARRAY_SIZE(usb_resources),
  88 };
  89
  90 void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
  91 {
  92         usb_data.power = mA > 510 ? 255 : mA / 2;
  93         usb_data.potpgt = (potpgt_ms + 1) / 2;
  94
  95         if (cpu_is_davinci_dm646x()) {
  96                 /* Override the defaults as DM6467 uses different IRQs. */
  97                 usb_dev.resource[1].start = IRQ_DM646X_USBINT;
  98                 usb_dev.resource[2].start = IRQ_DM646X_USBDMAINT;
  99         } else  /* other devices don't have dedicated CPPI IRQ */
 100                 usb_dev.num_resources = 2;
 101
 102         platform_device_register(&usb_dev);
 103 }
 104
 105 #ifdef CONFIG_ARCH_DAVINCI_DA8XX
 106 static struct resource da8xx_usb20_resources[] = {
 107         {
 108                 .start          = DA8XX_USB0_BASE,
 109                 .end            = DA8XX_USB0_BASE + SZ_64K - 1,
 110                 .flags          = IORESOURCE_MEM,
 111         },
 112         {
 113                 .start          = IRQ_DA8XX_USB_INT,
 114                 .flags          = IORESOURCE_IRQ,
 115                 .name           = "mc",
 116         },
 117 };
 118
 119 int __init da8xx_register_usb20(unsigned mA, unsigned potpgt)
 120 {
 121         usb_data.clock  = "usb20";
 122         usb_data.power  = mA > 510 ? 255 : mA / 2;
 123         usb_data.potpgt = (potpgt + 1) / 2;
 124
 125         usb_dev.resource = da8xx_usb20_resources;
 126         usb_dev.num_resources = ARRAY_SIZE(da8xx_usb20_resources);
 127         usb_dev.name = "musb-da8xx";
 128
 129         return platform_device_register(&usb_dev);
 130 }
 131 #endif  /* CONFIG_DAVINCI_DA8XX */
 132
 133 #else
 134
 135 void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
 136 {
 137 }
 138
 139 #ifdef CONFIG_ARCH_DAVINCI_DA8XX
 140 int __init da8xx_register_usb20(unsigned mA, unsigned potpgt)
 141 {
 142         return 0;
 143 }
 144 #endif
 145
 146 #endif  /* CONFIG_USB_MUSB_HDRC */
 147
 148 #ifdef  CONFIG_ARCH_DAVINCI_DA8XX
 149 static struct resource da8xx_usb11_resources[] = {
 150         [0] = {
 151                 .start  = DA8XX_USB1_BASE,
 152                 .end    = DA8XX_USB1_BASE + SZ_4K - 1,
 153                 .flags  = IORESOURCE_MEM,
 154         },
 155         [1] = {
 156                 .start  = IRQ_DA8XX_IRQN,
 157                 .end    = IRQ_DA8XX_IRQN,
 158                 .flags  = IORESOURCE_IRQ,
 159         },
 160 };
 161
 162 static u64 da8xx_usb11_dma_mask = DMA_BIT_MASK(32);
 163
 164 static struct platform_device da8xx_usb11_device = {
 165         .name           = "ohci",
 166         .id             = 0,
 167         .dev = {
 168                 .dma_mask               = &da8xx_usb11_dma_mask,
 169                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 170         },
 171         .num_resources  = ARRAY_SIZE(da8xx_usb11_resources),
 172         .resource       = da8xx_usb11_resources,
 173 };
 174
 175 int __init da8xx_register_usb11(struct da8xx_ohci_root_hub *pdata)
 176 {
 177         da8xx_usb11_device.dev.platform_data = pdata;
 178         return platform_device_register(&da8xx_usb11_device);
 179 }
 180 #endif  /* CONFIG_DAVINCI_DA8XX */