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 */
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>
27 #include <linux/usb/musb.h>
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"
36 static struct musb_hdrc_config musb_config = {
37 .multipoint = 1,
38 .dyn_fifo = 1,
39 .num_eps = 16,
40 .ram_bits = 12,
41 };
43 static 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,
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 };
61 static u64 musb_dmamask = DMA_BIT_MASK(32);
63 static void usb_musb_mux_init(struct omap_musb_board_data *board_data)
64 {
65 switch (board_data->interface_type) {
66 case MUSB_INTERFACE_UTMI:
67 omap_mux_init_signal("usba0_otg_dp", OMAP_PIN_INPUT);
68 omap_mux_init_signal("usba0_otg_dm", OMAP_PIN_INPUT);
69 break;
70 case MUSB_INTERFACE_ULPI:
71 omap_mux_init_signal("usba0_ulpiphy_clk",
72 OMAP_PIN_INPUT_PULLDOWN);
73 omap_mux_init_signal("usba0_ulpiphy_stp",
74 OMAP_PIN_INPUT_PULLDOWN);
75 omap_mux_init_signal("usba0_ulpiphy_dir",
76 OMAP_PIN_INPUT_PULLDOWN);
77 omap_mux_init_signal("usba0_ulpiphy_nxt",
78 OMAP_PIN_INPUT_PULLDOWN);
79 omap_mux_init_signal("usba0_ulpiphy_dat0",
80 OMAP_PIN_INPUT_PULLDOWN);
81 omap_mux_init_signal("usba0_ulpiphy_dat1",
82 OMAP_PIN_INPUT_PULLDOWN);
83 omap_mux_init_signal("usba0_ulpiphy_dat2",
84 OMAP_PIN_INPUT_PULLDOWN);
85 omap_mux_init_signal("usba0_ulpiphy_dat3",
86 OMAP_PIN_INPUT_PULLDOWN);
87 omap_mux_init_signal("usba0_ulpiphy_dat4",
88 OMAP_PIN_INPUT_PULLDOWN);
89 omap_mux_init_signal("usba0_ulpiphy_dat5",
90 OMAP_PIN_INPUT_PULLDOWN);
91 omap_mux_init_signal("usba0_ulpiphy_dat6",
92 OMAP_PIN_INPUT_PULLDOWN);
93 omap_mux_init_signal("usba0_ulpiphy_dat7",
94 OMAP_PIN_INPUT_PULLDOWN);
95 break;
96 default:
97 break;
98 }
99 }
101 static struct omap_musb_board_data musb_default_board_data = {
102 .interface_type = MUSB_INTERFACE_ULPI,
103 .mode = MUSB_OTG,
104 .power = 100,
105 };
107 void __init usb_musb_init(struct omap_musb_board_data *musb_board_data)
108 {
109 struct omap_hwmod *oh;
110 struct platform_device *pdev;
111 struct device *dev;
112 int bus_id = -1;
113 const char *oh_name, *name;
114 struct omap_musb_board_data *board_data;
116 if (musb_board_data)
117 board_data = musb_board_data;
118 else
119 board_data = &musb_default_board_data;
121 /*
122 * REVISIT: This line can be removed once all the platforms using
123 * musb_core.c have been converted to use use clkdev.
124 */
125 musb_plat.clock = "ick";
126 musb_plat.board_data = board_data;
127 musb_plat.power = board_data->power >> 1;
128 musb_plat.mode = board_data->mode;
129 musb_plat.extvbus = board_data->extvbus;
131 if (cpu_is_omap3517() || cpu_is_omap3505()) {
132 oh_name = "am35x_otg_hs";
133 name = "musb-am35x";
134 } else {
135 oh_name = "usb_otg_hs";
136 name = "musb-omap2430";
137 }
139 oh = omap_hwmod_lookup(oh_name);
140 if (WARN(!oh, "%s: could not find omap_hwmod for %s\n",
141 __func__, oh_name))
142 return;
144 pdev = omap_device_build(name, bus_id, oh, &musb_plat,
145 sizeof(musb_plat), NULL, 0, false);
146 if (IS_ERR(pdev)) {
147 pr_err("Could not build omap_device for %s %s\n",
148 name, oh_name);
149 return;
150 }
152 dev = &pdev->dev;
153 get_device(dev);
154 dev->dma_mask = &musb_dmamask;
155 dev->coherent_dma_mask = musb_dmamask;
156 put_device(dev);
158 if (cpu_is_omap44xx())
159 omap4430_phy_init(dev);
160 }