LXR linux/arch/arm/mach-davinci/usb.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * USB
   4 */
   5#include <linux/dma-mapping.h>
   6#include <linux/init.h>
   7#include <linux/platform_device.h>
   8#include <linux/platform_data/usb-davinci.h>
   9#include <linux/usb/musb.h>
  10
  11#include <mach/common.h>
  12#include <mach/cputype.h>
  13
  14#include "irqs.h"
  15
  16#define DAVINCI_USB_OTG_BASE    0x01c64000
  17
  18#if IS_ENABLED(CONFIG_USB_MUSB_HDRC)
  19static struct musb_hdrc_config musb_config = {
  20        .multipoint     = true,
  21
  22        .num_eps        = 5,
  23        .ram_bits       = 10,
  24};
  25
  26static 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
  33static 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          = DAVINCI_INTC_IRQ(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
  52static u64 usb_dmamask = DMA_BIT_MASK(32);
  53
  54static 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
  66void __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 = DAVINCI_INTC_IRQ(IRQ_DM646X_USBINT);
  74                usb_dev.resource[2].start = DAVINCI_INTC_IRQ(
  75                                                        IRQ_DM646X_USBDMAINT);
  76        } else  /* other devices don't have dedicated CPPI IRQ */
  77                usb_dev.num_resources = 2;
  78
  79        platform_device_register(&usb_dev);
  80}
  81
  82#else
  83
  84void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
  85{
  86}
  87
  88#endif  /* CONFIG_USB_MUSB_HDRC */
  89