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
  27#include <linux/usb/musb.h>
  28
  29#include <mach/hardware.h>
  30#include <mach/irqs.h>
  31#include <mach/am35xx.h>
  32#include <plat/usb.h>
  33#include <plat/omap_device.h>
  34#include "mux.h"
  35
  36static struct musb_hdrc_config musb_config = {
  37        .multipoint     = 1,
  38        .dyn_fifo       = 1,
  39        .num_eps        = 16,
  40        .ram_bits       = 12,
  41};
  42
  43static struct musb_hdrc_platform_data musb_plat = {
  44#ifdef CONFIG_USB_MUSB_OTG
  45        .mode           = MUSB_OTG,
  46#elif defined(CONFIG_USB_MUSB_HDRC_HCD)
  47        .mode           = MUSB_HOST,
  48#elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
  49        .mode           = MUSB_PERIPHERAL,
  50#endif
  51        /* .clock is set dynamically */
  52        .config         = &musb_config,
  53
  54        /* REVISIT charge pump on TWL4030 can supply up to
  55         * 100 mA ... but this value is board-specific, like
  56         * "mode", and should be passed to usb_musb_init().
  57         */
  58        .power          = 50,                   /* up to 100 mA */
  59};
  60
  61static u64 musb_dmamask = DMA_BIT_MASK(32);
  62
  63static struct omap_musb_board_data musb_default_board_data = {
  64        .interface_type         = MUSB_INTERFACE_ULPI,
  65        .mode                   = MUSB_OTG,
  66        .power                  = 100,
  67};
  68
  69void __init usb_musb_init(struct omap_musb_board_data *musb_board_data)
  70{
  71        struct omap_hwmod               *oh;
  72        struct platform_device          *pdev;
  73        struct device                   *dev;
  74        int                             bus_id = -1;
  75        const char                      *oh_name, *name;
  76        struct omap_musb_board_data     *board_data;
  77
  78        if (musb_board_data)
  79                board_data = musb_board_data;
  80        else
  81                board_data = &musb_default_board_data;
  82
  83        /*
  84         * REVISIT: This line can be removed once all the platforms using
  85         * musb_core.c have been converted to use use clkdev.
  86         */
  87        musb_plat.clock = "ick";
  88        musb_plat.board_data = board_data;
  89        musb_plat.power = board_data->power >> 1;
  90        musb_plat.mode = board_data->mode;
  91        musb_plat.extvbus = board_data->extvbus;
  92
  93        if (cpu_is_omap3517() || cpu_is_omap3505()) {
  94                oh_name = "am35x_otg_hs";
  95                name = "musb-am35x";
  96        } else if (cpu_is_ti81xx()) {
  97                oh_name = "usb_otg_hs";
  98                name = "musb-ti81xx";
  99        } else {
 100                oh_name = "usb_otg_hs";
 101                name = "musb-omap2430";
 102        }
 103
 104        oh = omap_hwmod_lookup(oh_name);
 105        if (WARN(!oh, "%s: could not find omap_hwmod for %s\n",
 106                 __func__, oh_name))
 107                return;
 108
 109        pdev = omap_device_build(name, bus_id, oh, &musb_plat,
 110                               sizeof(musb_plat), NULL, 0, false);
 111        if (IS_ERR(pdev)) {
 112                pr_err("Could not build omap_device for %s %s\n",
 113                                                name, oh_name);
 114                return;
 115        }
 116
 117        dev = &pdev->dev;
 118        get_device(dev);
 119        dev->dma_mask = &musb_dmamask;
 120        dev->coherent_dma_mask = musb_dmamask;
 121        put_device(dev);
 122
 123        if (cpu_is_omap44xx())
 124                omap4430_phy_init(dev);
 125}
 126