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_GADGET_MUSB_HDRC
 45	.mode		= MUSB_OTG,
 46#else
 47	.mode		= MUSB_HOST,
 48#endif
 49	/* .clock is set dynamically */
 50	.config		= &musb_config,
 51
 52	/* REVISIT charge pump on TWL4030 can supply up to
 53	 * 100 mA ... but this value is board-specific, like
 54	 * "mode", and should be passed to usb_musb_init().
 55	 */
 56	.power		= 50,			/* up to 100 mA */
 57};
 58
 59static u64 musb_dmamask = DMA_BIT_MASK(32);
 60
 61static struct omap_musb_board_data musb_default_board_data = {
 62	.interface_type		= MUSB_INTERFACE_ULPI,
 63	.mode			= MUSB_OTG,
 64	.power			= 100,
 65};
 66
 67void __init usb_musb_init(struct omap_musb_board_data *musb_board_data)
 68{
 69	struct omap_hwmod		*oh;
 70	struct platform_device		*pdev;
 71	struct device			*dev;
 72	int				bus_id = -1;
 73	const char			*oh_name, *name;
 74	struct omap_musb_board_data	*board_data;
 75
 76	if (musb_board_data)
 77		board_data = musb_board_data;
 78	else
 79		board_data = &musb_default_board_data;
 80
 81	/*
 82	 * REVISIT: This line can be removed once all the platforms using
 83	 * musb_core.c have been converted to use use clkdev.
 84	 */
 85	musb_plat.clock = "ick";
 86	musb_plat.board_data = board_data;
 87	musb_plat.power = board_data->power >> 1;
 88	musb_plat.mode = board_data->mode;
 89	musb_plat.extvbus = board_data->extvbus;
 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), NULL, 0, false);
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	if (cpu_is_omap44xx())
122		omap4430_phy_init(dev);
123}