release/src-rt-6.x.4708/linux/linux-2.6.36/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/usb.h>
  32
  33 #ifdef CONFIG_USB_MUSB_SOC
  34
  35 static struct resource musb_resources[] = {
  36         [0] = { /* start and end set dynamically */
  37                 .flags  = IORESOURCE_MEM,
  38         },
  39         [1] = { /* general IRQ */
  40                 .start  = INT_243X_HS_USB_MC,
  41                 .flags  = IORESOURCE_IRQ,
  42         },
  43         [2] = { /* DMA IRQ */
  44                 .start  = INT_243X_HS_USB_DMA,
  45                 .flags  = IORESOURCE_IRQ,
  46         },
  47 };
  48
  49 static struct musb_hdrc_config musb_config = {
  50         .multipoint     = 1,
  51         .dyn_fifo       = 1,
  52         .num_eps        = 16,
  53         .ram_bits       = 12,
  54 };
  55
  56 static struct musb_hdrc_platform_data musb_plat = {
  57 #ifdef CONFIG_USB_MUSB_OTG
  58         .mode           = MUSB_OTG,
  59 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
  60         .mode           = MUSB_HOST,
  61 #elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
  62         .mode           = MUSB_PERIPHERAL,
  63 #endif
  64         /* .clock is set dynamically */
  65         .config         = &musb_config,
  66
  67         /* REVISIT charge pump on TWL4030 can supply up to
  68          * 100 mA ... but this value is board-specific, like
  69          * "mode", and should be passed to usb_musb_init().
  70          */
  71         .power          = 50,                   /* up to 100 mA */
  72 };
  73
  74 static u64 musb_dmamask = DMA_BIT_MASK(32);
  75
  76 static struct platform_device musb_device = {
  77         .name           = "musb_hdrc",
  78         .id             = -1,
  79         .dev = {
  80                 .dma_mask               = &musb_dmamask,
  81                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  82                 .platform_data          = &musb_plat,
  83         },
  84         .num_resources  = ARRAY_SIZE(musb_resources),
  85         .resource       = musb_resources,
  86 };
  87
  88 void __init usb_musb_init(struct omap_musb_board_data *board_data)
  89 {
  90         if (cpu_is_omap243x()) {
  91                 musb_resources[0].start = OMAP243X_HS_BASE;
  92         } else if (cpu_is_omap34xx()) {
  93                 musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE;
  94         } else if (cpu_is_omap44xx()) {
  95                 musb_resources[0].start = OMAP44XX_HSUSB_OTG_BASE;
  96                 musb_resources[1].start = OMAP44XX_IRQ_HS_USB_MC_N;
  97                 musb_resources[2].start = OMAP44XX_IRQ_HS_USB_DMA_N;
  98         }
  99         musb_resources[0].end = musb_resources[0].start + SZ_4K - 1;
 100
 101         /*
 102          * REVISIT: This line can be removed once all the platforms using
 103          * musb_core.c have been converted to use use clkdev.
 104          */
 105         musb_plat.clock = "ick";
 106         musb_plat.board_data = board_data;
 107         musb_plat.power = board_data->power >> 1;
 108         musb_plat.mode = board_data->mode;
 109         musb_plat.extvbus = board_data->extvbus;
 110
 111         if (platform_device_register(&musb_device) < 0)
 112                 printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n");
 113 }
 114
 115 #else
 116 void __init usb_musb_init(struct omap_musb_board_data *board_data)
 117 {
 118 }
 119 #endif /* CONFIG_USB_MUSB_SOC */