arch/arm/mach-omap2/usb-musb.c

   1 /*
   2  * linux/arch/arm/mach-omap2/usb-musb.c
   3  *
   4  * This file will contain the board specific details for the
   5  * MENTOR USB OTG controller on OMAP3430
   6  *
   7  * Copyright (C) 2007-2008 Texas Instruments
   8  * Copyright (C) 2008 Nokia Corporation
   9  * Author: Vikram Pandita
  10  *
  11  * Generalization by:
  12  * Felipe Balbi <felipe.balbi@nokia.com>
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License version 2 as
  16  * published by the Free Software Foundation.
  17  */
  18
  19 #include <linux/types.h>
  20 #include <linux/errno.h>
  21 #include <linux/delay.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/clk.h>
  24 #include <linux/dma-mapping.h>
  25 #include <linux/io.h>
  26
  27 #include <linux/usb/musb.h>
  28
  29 #include <mach/hardware.h>
  30 #include <mach/irqs.h>
  31 #include <plat/mux.h>
  32 #include <plat/usb.h>
  33
  34 #ifdef CONFIG_USB_MUSB_SOC
  35
  36 static struct resource musb_resources[] = {
  37         [0] = { /* start and end set dynamically */
  38                 .flags  = IORESOURCE_MEM,
  39         },
  40         [1] = { /* general IRQ */
  41                 .start  = INT_243X_HS_USB_MC,
  42                 .flags  = IORESOURCE_IRQ,
  43         },
  44         [2] = { /* DMA IRQ */
  45                 .start  = INT_243X_HS_USB_DMA,
  46                 .flags  = IORESOURCE_IRQ,
  47         },
  48 };
  49
  50 static struct musb_hdrc_config musb_config = {
  51         .multipoint     = 1,
  52         .dyn_fifo       = 1,
  53         .num_eps        = 16,
  54         .ram_bits       = 12,
  55 };
  56
  57 static struct musb_hdrc_platform_data musb_plat = {
  58 #ifdef CONFIG_USB_MUSB_OTG
  59         .mode           = MUSB_OTG,
  60 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
  61         .mode           = MUSB_HOST,
  62 #elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
  63         .mode           = MUSB_PERIPHERAL,
  64 #endif
  65         /* .clock is set dynamically */
  66         .config         = &musb_config,
  67
  68         /* REVISIT charge pump on TWL4030 can supply up to
  69          * 100 mA ... but this value is board-specific, like
  70          * "mode", and should be passed to usb_musb_init().
  71          */
  72         .power          = 50,                   /* up to 100 mA */
  73 };
  74
  75 static u64 musb_dmamask = DMA_BIT_MASK(32);
  76
  77 static struct platform_device musb_device = {
  78         .name           = "musb_hdrc",
  79         .id             = -1,
  80         .dev = {
  81                 .dma_mask               = &musb_dmamask,
  82                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  83                 .platform_data          = &musb_plat,
  84         },
  85         .num_resources  = ARRAY_SIZE(musb_resources),
  86         .resource       = musb_resources,
  87 };
  88
  89 void __init usb_musb_init(struct omap_musb_board_data *board_data)
  90 {
  91         if (cpu_is_omap243x()) {
  92                 musb_resources[0].start = OMAP243X_HS_BASE;
  93         } else if (cpu_is_omap34xx()) {
  94                 musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE;
  95         } else if (cpu_is_omap44xx()) {
  96                 musb_resources[0].start = OMAP44XX_HSUSB_OTG_BASE;
  97                 musb_resources[1].start = OMAP44XX_IRQ_HS_USB_MC_N;
  98                 musb_resources[2].start = OMAP44XX_IRQ_HS_USB_DMA_N;
  99         }
 100         musb_resources[0].end = musb_resources[0].start + SZ_4K - 1;
 101
 102         /*
 103          * REVISIT: This line can be removed once all the platforms using
 104          * musb_core.c have been converted to use use clkdev.
 105          */
 106         musb_plat.clock = "ick";
 107         musb_plat.board_data = board_data;
 108         musb_plat.power = board_data->power >> 1;
 109         musb_plat.mode = board_data->mode;
 110         musb_plat.extvbus = board_data->extvbus;
 111
 112         if (platform_device_register(&musb_device) < 0)
 113                 printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n");
 114 }
 115
 116 #else
 117 void __init usb_musb_init(struct omap_musb_board_data *board_data)
 118 {
 119 }
 120 #endif /* CONFIG_USB_MUSB_SOC */