kernel/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/da8xx.h>
  14 #include <linux/platform_data/usb-davinci.h>
  15
  16 #define DAVINCI_USB_OTG_BASE    0x01c64000
  17
  18 #define DA8XX_USB0_BASE         0x01e00000
  19 #define DA8XX_USB1_BASE         0x01e25000
  20
  21 #if IS_ENABLED(CONFIG_USB_MUSB_HDRC)
  22 static struct musb_hdrc_eps_bits musb_eps[] = {
  23         { "ep1_tx", 8, },
  24         { "ep1_rx", 8, },
  25         { "ep2_tx", 8, },
  26         { "ep2_rx", 8, },
  27         { "ep3_tx", 5, },
  28         { "ep3_rx", 5, },
  29         { "ep4_tx", 5, },
  30         { "ep4_rx", 5, },
  31 };
  32
  33 static struct musb_hdrc_config musb_config = {
  34         .multipoint     = true,
  35         .dyn_fifo       = true,
  36         .soft_con       = true,
  37         .dma            = true,
  38
  39         .num_eps        = 5,
  40         .dma_channels   = 8,
  41         .ram_bits       = 10,
  42         .eps_bits       = musb_eps,
  43 };
  44
  45 static struct musb_hdrc_platform_data usb_data = {
  46         /* OTG requires a Mini-AB connector */
  47         .mode           = MUSB_OTG,
  48         .clock          = "usb",
  49         .config         = &musb_config,
  50 };
  51
  52 static struct resource usb_resources[] = {
  53         {
  54                 /* physical address */
  55                 .start          = DAVINCI_USB_OTG_BASE,
  56                 .end            = DAVINCI_USB_OTG_BASE + 0x5ff,
  57                 .flags          = IORESOURCE_MEM,
  58         },
  59         {
  60                 .start          = IRQ_USBINT,
  61                 .flags          = IORESOURCE_IRQ,
  62                 .name           = "mc"
  63         },
  64         {
  65                 /* placeholder for the dedicated CPPI IRQ */
  66                 .flags          = IORESOURCE_IRQ,
  67                 .name           = "dma"
  68         },
  69 };
  70
  71 static u64 usb_dmamask = DMA_BIT_MASK(32);
  72
  73 static struct platform_device usb_dev = {
  74         .name           = "musb-davinci",
  75         .id             = -1,
  76         .dev = {
  77                 .platform_data          = &usb_data,
  78                 .dma_mask               = &usb_dmamask,
  79                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  80         },
  81         .resource       = usb_resources,
  82         .num_resources  = ARRAY_SIZE(usb_resources),
  83 };
  84
  85 void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
  86 {
  87         usb_data.power = mA > 510 ? 255 : mA / 2;
  88         usb_data.potpgt = (potpgt_ms + 1) / 2;
  89
  90         if (cpu_is_davinci_dm646x()) {
  91                 /* Override the defaults as DM6467 uses different IRQs. */
  92                 usb_dev.resource[1].start = IRQ_DM646X_USBINT;
  93                 usb_dev.resource[2].start = IRQ_DM646X_USBDMAINT;
  94         } else  /* other devices don't have dedicated CPPI IRQ */
  95                 usb_dev.num_resources = 2;
  96
  97         platform_device_register(&usb_dev);
  98 }
  99
 100 #ifdef CONFIG_ARCH_DAVINCI_DA8XX
 101 static struct resource da8xx_usb20_resources[] = {
 102         {
 103                 .start          = DA8XX_USB0_BASE,
 104                 .end            = DA8XX_USB0_BASE + SZ_64K - 1,
 105                 .flags          = IORESOURCE_MEM,
 106         },
 107         {
 108                 .start          = IRQ_DA8XX_USB_INT,
 109                 .flags          = IORESOURCE_IRQ,
 110                 .name           = "mc",
 111         },
 112 };
 113
 114 int __init da8xx_register_usb20(unsigned mA, unsigned potpgt)
 115 {
 116         usb_data.clock  = "usb20";
 117         usb_data.power  = mA > 510 ? 255 : mA / 2;
 118         usb_data.potpgt = (potpgt + 1) / 2;
 119
 120         usb_dev.resource = da8xx_usb20_resources;
 121         usb_dev.num_resources = ARRAY_SIZE(da8xx_usb20_resources);
 122         usb_dev.name = "musb-da8xx";
 123
 124         return platform_device_register(&usb_dev);
 125 }
 126 #endif  /* CONFIG_DAVINCI_DA8XX */
 127
 128 #else
 129
 130 void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
 131 {
 132 }
 133
 134 #ifdef CONFIG_ARCH_DAVINCI_DA8XX
 135 int __init da8xx_register_usb20(unsigned mA, unsigned potpgt)
 136 {
 137         return 0;
 138 }
 139 #endif
 140
 141 #endif  /* CONFIG_USB_MUSB_HDRC */
 142
 143 #ifdef  CONFIG_ARCH_DAVINCI_DA8XX
 144 static struct resource da8xx_usb11_resources[] = {
 145         [0] = {
 146                 .start  = DA8XX_USB1_BASE,
 147                 .end    = DA8XX_USB1_BASE + SZ_4K - 1,
 148                 .flags  = IORESOURCE_MEM,
 149         },
 150         [1] = {
 151                 .start  = IRQ_DA8XX_IRQN,
 152                 .end    = IRQ_DA8XX_IRQN,
 153                 .flags  = IORESOURCE_IRQ,
 154         },
 155 };
 156
 157 static u64 da8xx_usb11_dma_mask = DMA_BIT_MASK(32);
 158
 159 static struct platform_device da8xx_usb11_device = {
 160         .name           = "ohci",
 161         .id             = 0,
 162         .dev = {
 163                 .dma_mask               = &da8xx_usb11_dma_mask,
 164                 .coherent_dma_mask      = DMA_BIT_MASK(32),
 165         },
 166         .num_resources  = ARRAY_SIZE(da8xx_usb11_resources),
 167         .resource       = da8xx_usb11_resources,
 168 };
 169
 170 int __init da8xx_register_usb11(struct da8xx_ohci_root_hub *pdata)
 171 {
 172         da8xx_usb11_device.dev.platform_data = pdata;
 173         return platform_device_register(&da8xx_usb11_device);
 174 }
 175 #endif  /* CONFIG_DAVINCI_DA8XX */