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_device_pm_latency omap_musb_latency[] = {
 64	{
 65		.deactivate_func	= omap_device_idle_hwmods,
 66		.activate_func		= omap_device_enable_hwmods,
 67		.flags			= OMAP_DEVICE_LATENCY_AUTO_ADJUST,
 68	},
 69};
 70
 71static void usb_musb_mux_init(struct omap_musb_board_data *board_data)
 72{
 73	switch (board_data->interface_type) {
 74	case MUSB_INTERFACE_UTMI:
 75		omap_mux_init_signal("usba0_otg_dp", OMAP_PIN_INPUT);
 76		omap_mux_init_signal("usba0_otg_dm", OMAP_PIN_INPUT);
 77		break;
 78	case MUSB_INTERFACE_ULPI:
 79		omap_mux_init_signal("usba0_ulpiphy_clk",
 80						OMAP_PIN_INPUT_PULLDOWN);
 81		omap_mux_init_signal("usba0_ulpiphy_stp",
 82						OMAP_PIN_INPUT_PULLDOWN);
 83		omap_mux_init_signal("usba0_ulpiphy_dir",
 84						OMAP_PIN_INPUT_PULLDOWN);
 85		omap_mux_init_signal("usba0_ulpiphy_nxt",
 86						OMAP_PIN_INPUT_PULLDOWN);
 87		omap_mux_init_signal("usba0_ulpiphy_dat0",
 88						OMAP_PIN_INPUT_PULLDOWN);
 89		omap_mux_init_signal("usba0_ulpiphy_dat1",
 90						OMAP_PIN_INPUT_PULLDOWN);
 91		omap_mux_init_signal("usba0_ulpiphy_dat2",
 92						OMAP_PIN_INPUT_PULLDOWN);
 93		omap_mux_init_signal("usba0_ulpiphy_dat3",
 94						OMAP_PIN_INPUT_PULLDOWN);
 95		omap_mux_init_signal("usba0_ulpiphy_dat4",
 96						OMAP_PIN_INPUT_PULLDOWN);
 97		omap_mux_init_signal("usba0_ulpiphy_dat5",
 98						OMAP_PIN_INPUT_PULLDOWN);
 99		omap_mux_init_signal("usba0_ulpiphy_dat6",
100						OMAP_PIN_INPUT_PULLDOWN);
101		omap_mux_init_signal("usba0_ulpiphy_dat7",
102						OMAP_PIN_INPUT_PULLDOWN);
103		break;
104	default:
105		break;
106	}
107}
108
109static struct omap_musb_board_data musb_default_board_data = {
110	.interface_type		= MUSB_INTERFACE_ULPI,
111	.mode			= MUSB_OTG,
112	.power			= 100,
113};
114
115void __init usb_musb_init(struct omap_musb_board_data *musb_board_data)
116{
117	struct omap_hwmod		*oh;
118	struct omap_device		*od;
119	struct platform_device		*pdev;
120	struct device			*dev;
121	int				bus_id = -1;
122	const char			*oh_name, *name;
123	struct omap_musb_board_data	*board_data;
124
125	if (musb_board_data)
126		board_data = musb_board_data;
127	else
128		board_data = &musb_default_board_data;
129
130	/*
131	 * REVISIT: This line can be removed once all the platforms using
132	 * musb_core.c have been converted to use use clkdev.
133	 */
134	musb_plat.clock = "ick";
135	musb_plat.board_data = board_data;
136	musb_plat.power = board_data->power >> 1;
137	musb_plat.mode = board_data->mode;
138	musb_plat.extvbus = board_data->extvbus;
139
140	if (cpu_is_omap3517() || cpu_is_omap3505()) {
141		oh_name = "am35x_otg_hs";
142		name = "musb-am35x";
143	} else {
144		oh_name = "usb_otg_hs";
145		name = "musb-omap2430";
146	}
147
148	oh = omap_hwmod_lookup(oh_name);
149	if (!oh) {
150		pr_err("Could not look up %s\n", oh_name);
151		return;
152	}
153
154	od = omap_device_build(name, bus_id, oh, &musb_plat,
155			       sizeof(musb_plat), omap_musb_latency,
156			       ARRAY_SIZE(omap_musb_latency), false);
157	if (IS_ERR(od)) {
158		pr_err("Could not build omap_device for %s %s\n",
159						name, oh_name);
160		return;
161	}
162
163	pdev = &od->pdev;
164	dev = &pdev->dev;
165	get_device(dev);
166	dev->dma_mask = &musb_dmamask;
167	dev->coherent_dma_mask = musb_dmamask;
168	put_device(dev);
169
170	if (cpu_is_omap44xx())
171		omap4430_phy_init(dev);
172}