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#ifdef CONFIG_USB_GADGET_MUSB_HDRC
  42        .mode           = MUSB_OTG,
  43#else
  44        .mode           = MUSB_HOST,
  45#endif
  46        /* .clock is set dynamically */
  47        .config         = &musb_config,
  48
  49        /* REVISIT charge pump on TWL4030 can supply up to
  50         * 100 mA ... but this value is board-specific, like
  51         * "mode", and should be passed to usb_musb_init().
  52         */
  53        .power          = 50,                   /* up to 100 mA */
  54};
  55
  56static u64 musb_dmamask = DMA_BIT_MASK(32);
  57
  58static struct omap_musb_board_data musb_default_board_data = {
  59        .interface_type         = MUSB_INTERFACE_ULPI,
  60        .mode                   = MUSB_OTG,
  61        .power                  = 100,
  62};
  63
  64void __init usb_musb_init(struct omap_musb_board_data *musb_board_data)
  65{
  66        struct omap_hwmod               *oh;
  67        struct platform_device          *pdev;
  68        struct device                   *dev;
  69        int                             bus_id = -1;
  70        const char                      *oh_name, *name;
  71        struct omap_musb_board_data     *board_data;
  72
  73        if (musb_board_data)
  74                board_data = musb_board_data;
  75        else
  76                board_data = &musb_default_board_data;
  77
  78        /*
  79         * REVISIT: This line can be removed once all the platforms using
  80         * musb_core.c have been converted to use use clkdev.
  81         */
  82        musb_plat.clock = "ick";
  83        musb_plat.board_data = board_data;
  84        musb_plat.power = board_data->power >> 1;
  85        musb_plat.mode = board_data->mode;
  86        musb_plat.extvbus = board_data->extvbus;
  87
  88        if (cpu_is_omap44xx())
  89                musb_plat.has_mailbox = true;
  90
  91        if (soc_is_am35xx()) {
  92                oh_name = "am35x_otg_hs";
  93                name = "musb-am35x";
  94        } else if (cpu_is_ti81xx()) {
  95                oh_name = "usb_otg_hs";
  96                name = "musb-ti81xx";
  97        } else {
  98                oh_name = "usb_otg_hs";
  99                name = "musb-omap2430";
 100        }
 101
 102        oh = omap_hwmod_lookup(oh_name);
 103        if (WARN(!oh, "%s: could not find omap_hwmod for %s\n",
 104                 __func__, oh_name))
 105                return;
 106
 107        pdev = omap_device_build(name, bus_id, oh, &musb_plat,
 108                                 sizeof(musb_plat));
 109        if (IS_ERR(pdev)) {
 110                pr_err("Could not build omap_device for %s %s\n",
 111                                                name, oh_name);
 112                return;
 113        }
 114
 115        dev = &pdev->dev;
 116        get_device(dev);
 117        dev->dma_mask = &musb_dmamask;
 118        dev->coherent_dma_mask = musb_dmamask;
 119        put_device(dev);
 120}
 121