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
36 static struct musb_hdrc_config musb_config = {
37 .multipoint = 1,
38 .dyn_fifo = 1,
39 .num_eps = 16,
40 .ram_bits = 12,
41 };
42
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,
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
61 static u64 musb_dmamask = DMA_BIT_MASK(32);
62
63 static struct omap_musb_board_data musb_default_board_data = {
64 .interface_type = MUSB_INTERFACE_ULPI,
65 .mode = MUSB_OTG,
66 .power = 100,
67 };
68
usb_musb_init(struct omap_musb_board_data * musb_board_data)69 void __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