arch/arm/mach-davinci/usb.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * USB
   4  */
   5 #include <linux/init.h>
   6 #include <linux/platform_device.h>
   7 #include <linux/dma-mapping.h>
   8
   9 #include <linux/usb/musb.h>
  10
  11 #include <mach/common.h>
  12 #include <mach/irqs.h>
  13 #include <mach/cputype.h>
  14 #include <linux/platform_data/usb-davinci.h>
  15
  16 #define DAVINCI_USB_OTG_BASE    0x01c64000
  17
  18 #if IS_ENABLED(CONFIG_USB_MUSB_HDRC)
  19 static struct musb_hdrc_config musb_config = {
  20         .multipoint     = true,
  21
  22         .num_eps        = 5,
  23         .ram_bits       = 10,
  24 };
  25
  26 static struct musb_hdrc_platform_data usb_data = {
  27         /* OTG requires a Mini-AB connector */
  28         .mode           = MUSB_OTG,
  29         .clock          = "usb",
  30         .config         = &musb_config,
  31 };
  32
  33 static struct resource usb_resources[] = {
  34         {
  35                 /* physical address */
  36                 .start          = DAVINCI_USB_OTG_BASE,
  37                 .end            = DAVINCI_USB_OTG_BASE + 0x5ff,
  38                 .flags          = IORESOURCE_MEM,
  39         },
  40         {
  41                 .start          = IRQ_USBINT,
  42                 .flags          = IORESOURCE_IRQ,
  43                 .name           = "mc"
  44         },
  45         {
  46                 /* placeholder for the dedicated CPPI IRQ */
  47                 .flags          = IORESOURCE_IRQ,
  48                 .name           = "dma"
  49         },
  50 };
  51
  52 static u64 usb_dmamask = DMA_BIT_MASK(32);
  53
  54 static struct platform_device usb_dev = {
  55         .name           = "musb-davinci",
  56         .id             = -1,
  57         .dev = {
  58                 .platform_data          = &usb_data,
  59                 .dma_mask               = &usb_dmamask,
  60                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  61         },
  62         .resource       = usb_resources,
  63         .num_resources  = ARRAY_SIZE(usb_resources),
  64 };
  65
  66 void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
  67 {
  68         usb_data.power = mA > 510 ? 255 : mA / 2;
  69         usb_data.potpgt = (potpgt_ms + 1) / 2;
  70
  71         if (cpu_is_davinci_dm646x()) {
  72                 /* Override the defaults as DM6467 uses different IRQs. */
  73                 usb_dev.resource[1].start = IRQ_DM646X_USBINT;
  74                 usb_dev.resource[2].start = IRQ_DM646X_USBDMAINT;
  75         } else  /* other devices don't have dedicated CPPI IRQ */
  76                 usb_dev.num_resources = 2;
  77
  78         platform_device_register(&usb_dev);
  79 }
  80
  81 #else
  82
  83 void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
  84 {
  85 }
  86
  87 #endif  /* CONFIG_USB_MUSB_HDRC */