LXR linux/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#include <linux/usb/musb.h>
  27
  28#include "omap_device.h"
  29#include "soc.h"
  30#include "mux.h"
  31#include "usb.h"
  32
  33static struct musb_hdrc_config musb_config = {
  34        .multipoint     = 1,
  35        .dyn_fifo       = 1,
  36        .num_eps        = 16,
  37        .ram_bits       = 12,
  38};
  39
  40static struct musb_hdrc_platform_data musb_plat = {
  41        .mode           = MUSB_OTG,
  42
  43        /* .clock is set dynamically */
  44        .config         = &musb_config,
  45
  46        /* REVISIT charge pump on TWL4030 can supply up to
  47         * 100 mA ... but this value is board-specific, like
  48         * "mode", and should be passed to usb_musb_init().
  49         */
  50        .power          = 50,                   /* up to 100 mA */
  51};
  52
  53static u64 musb_dmamask = DMA_BIT_MASK(32);
  54
  55static struct omap_musb_board_data musb_default_board_data = {
  56        .interface_type         = MUSB_INTERFACE_ULPI,
  57        .mode                   = MUSB_OTG,
  58        .power                  = 100,
  59};
  60
  61void __init usb_musb_init(struct omap_musb_board_data *musb_board_data)
  62{
  63        struct omap_hwmod               *oh;
  64        struct platform_device          *pdev;
  65        struct device                   *dev;
  66        int                             bus_id = -1;
  67        const char                      *oh_name, *name;
  68        struct omap_musb_board_data     *board_data;
  69
  70        if (musb_board_data)
  71                board_data = musb_board_data;
  72        else
  73                board_data = &musb_default_board_data;
  74
  75        /*
  76         * REVISIT: This line can be removed once all the platforms using
  77         * musb_core.c have been converted to use use clkdev.
  78         */
  79        musb_plat.clock = "ick";
  80        musb_plat.board_data = board_data;
  81        musb_plat.power = board_data->power >> 1;
  82        musb_plat.mode = board_data->mode;
  83        musb_plat.extvbus = board_data->extvbus;
  84
  85        if (soc_is_am35xx()) {
  86                oh_name = "am35x_otg_hs";
  87                name = "musb-am35x";
  88        } else if (cpu_is_ti81xx()) {
  89                oh_name = "usb_otg_hs";
  90                name = "musb-ti81xx";
  91        } else {
  92                oh_name = "usb_otg_hs";
  93                name = "musb-omap2430";
  94        }
  95
  96        oh = omap_hwmod_lookup(oh_name);
  97        if (WARN(!oh, "%s: could not find omap_hwmod for %s\n",
  98                 __func__, oh_name))
  99                return;
 100
 101        pdev = omap_device_build(name, bus_id, oh, &musb_plat,
 102                                 sizeof(musb_plat));
 103        if (IS_ERR(pdev)) {
 104                pr_err("Could not build omap_device for %s %s\n",
 105                                                name, oh_name);
 106                return;
 107        }
 108
 109        dev = &pdev->dev;
 110        get_device(dev);
 111        dev->dma_mask = &musb_dmamask;
 112        dev->coherent_dma_mask = musb_dmamask;
 113        put_device(dev);
 114}
 115