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