Merge branches 'devel-mux' and 'devel-misc' into omap-for-linus
[linux-3.10.git] / arch / arm / mach-omap2 / usb-musb.c
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 #if defined(CONFIG_USB_MUSB_OMAP2PLUS) || defined (CONFIG_USB_MUSB_AM35X)
37
38 static struct musb_hdrc_config musb_config = {
39         .multipoint     = 1,
40         .dyn_fifo       = 1,
41         .num_eps        = 16,
42         .ram_bits       = 12,
43 };
44
45 static struct musb_hdrc_platform_data musb_plat = {
46 #ifdef CONFIG_USB_MUSB_OTG
47         .mode           = MUSB_OTG,
48 #elif defined(CONFIG_USB_MUSB_HDRC_HCD)
49         .mode           = MUSB_HOST,
50 #elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
51         .mode           = MUSB_PERIPHERAL,
52 #endif
53         /* .clock is set dynamically */
54         .config         = &musb_config,
55
56         /* REVISIT charge pump on TWL4030 can supply up to
57          * 100 mA ... but this value is board-specific, like
58          * "mode", and should be passed to usb_musb_init().
59          */
60         .power          = 50,                   /* up to 100 mA */
61 };
62
63 static u64 musb_dmamask = DMA_BIT_MASK(32);
64
65 static struct omap_device_pm_latency omap_musb_latency[] = {
66         {
67                 .deactivate_func        = omap_device_idle_hwmods,
68                 .activate_func          = omap_device_enable_hwmods,
69                 .flags                  = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
70         },
71 };
72
73 static void usb_musb_mux_init(struct omap_musb_board_data *board_data)
74 {
75         switch (board_data->interface_type) {
76         case MUSB_INTERFACE_UTMI:
77                 omap_mux_init_signal("usba0_otg_dp", OMAP_PIN_INPUT);
78                 omap_mux_init_signal("usba0_otg_dm", OMAP_PIN_INPUT);
79                 break;
80         case MUSB_INTERFACE_ULPI:
81                 omap_mux_init_signal("usba0_ulpiphy_clk",
82                                                 OMAP_PIN_INPUT_PULLDOWN);
83                 omap_mux_init_signal("usba0_ulpiphy_stp",
84                                                 OMAP_PIN_INPUT_PULLDOWN);
85                 omap_mux_init_signal("usba0_ulpiphy_dir",
86                                                 OMAP_PIN_INPUT_PULLDOWN);
87                 omap_mux_init_signal("usba0_ulpiphy_nxt",
88                                                 OMAP_PIN_INPUT_PULLDOWN);
89                 omap_mux_init_signal("usba0_ulpiphy_dat0",
90                                                 OMAP_PIN_INPUT_PULLDOWN);
91                 omap_mux_init_signal("usba0_ulpiphy_dat1",
92                                                 OMAP_PIN_INPUT_PULLDOWN);
93                 omap_mux_init_signal("usba0_ulpiphy_dat2",
94                                                 OMAP_PIN_INPUT_PULLDOWN);
95                 omap_mux_init_signal("usba0_ulpiphy_dat3",
96                                                 OMAP_PIN_INPUT_PULLDOWN);
97                 omap_mux_init_signal("usba0_ulpiphy_dat4",
98                                                 OMAP_PIN_INPUT_PULLDOWN);
99                 omap_mux_init_signal("usba0_ulpiphy_dat5",
100                                                 OMAP_PIN_INPUT_PULLDOWN);
101                 omap_mux_init_signal("usba0_ulpiphy_dat6",
102                                                 OMAP_PIN_INPUT_PULLDOWN);
103                 omap_mux_init_signal("usba0_ulpiphy_dat7",
104                                                 OMAP_PIN_INPUT_PULLDOWN);
105                 break;
106         default:
107                 break;
108         }
109 }
110
111 void __init usb_musb_init(struct omap_musb_board_data *board_data)
112 {
113         struct omap_hwmod               *oh;
114         struct omap_device              *od;
115         struct platform_device          *pdev;
116         struct device                   *dev;
117         int                             bus_id = -1;
118         const char                      *oh_name, *name;
119
120         if (cpu_is_omap3517() || cpu_is_omap3505()) {
121         } else if (cpu_is_omap44xx()) {
122                 usb_musb_mux_init(board_data);
123         }
124
125         /*
126          * REVISIT: This line can be removed once all the platforms using
127          * musb_core.c have been converted to use use clkdev.
128          */
129         musb_plat.clock = "ick";
130         musb_plat.board_data = board_data;
131         musb_plat.power = board_data->power >> 1;
132         musb_plat.mode = board_data->mode;
133         musb_plat.extvbus = board_data->extvbus;
134
135         if (cpu_is_omap3517() || cpu_is_omap3505()) {
136                 oh_name = "am35x_otg_hs";
137                 name = "musb-am35x";
138         } else {
139                 oh_name = "usb_otg_hs";
140                 name = "musb-omap2430";
141         }
142
143         oh = omap_hwmod_lookup(oh_name);
144         if (!oh) {
145                 pr_err("Could not look up %s\n", oh_name);
146                 return;
147         }
148
149         od = omap_device_build(name, bus_id, oh, &musb_plat,
150                                sizeof(musb_plat), omap_musb_latency,
151                                ARRAY_SIZE(omap_musb_latency), false);
152         if (IS_ERR(od)) {
153                 pr_err("Could not build omap_device for %s %s\n",
154                                                 name, oh_name);
155                 return;
156         }
157
158         pdev = &od->pdev;
159         dev = &pdev->dev;
160         get_device(dev);
161         dev->dma_mask = &musb_dmamask;
162         dev->coherent_dma_mask = musb_dmamask;
163         put_device(dev);
164 }
165
166 #else
167 void __init usb_musb_init(struct omap_musb_board_data *board_data)
168 {
169 }
170 #endif /* CONFIG_USB_MUSB_SOC */