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18cb7aca FB |
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/pm.h> | |
32 | #include <mach/mux.h> | |
33 | #include <mach/usb.h> | |
34 | ||
35 | static struct resource musb_resources[] = { | |
36 | [0] = { /* start and end set dynamically */ | |
37 | .flags = IORESOURCE_MEM, | |
38 | }, | |
39 | [1] = { /* general IRQ */ | |
40 | .start = INT_243X_HS_USB_MC, | |
41 | .flags = IORESOURCE_IRQ, | |
42 | }, | |
43 | [2] = { /* DMA IRQ */ | |
44 | .start = INT_243X_HS_USB_DMA, | |
45 | .flags = IORESOURCE_IRQ, | |
46 | }, | |
47 | }; | |
48 | ||
49 | static int clk_on; | |
50 | ||
51 | static int musb_set_clock(struct clk *clk, int state) | |
52 | { | |
53 | if (state) { | |
54 | if (clk_on > 0) | |
55 | return -ENODEV; | |
56 | ||
57 | clk_enable(clk); | |
58 | clk_on = 1; | |
59 | } else { | |
60 | if (clk_on == 0) | |
61 | return -ENODEV; | |
62 | ||
63 | clk_disable(clk); | |
64 | clk_on = 0; | |
65 | } | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
70 | static struct musb_hdrc_eps_bits musb_eps[] = { | |
71 | { "ep1_tx", 10, }, | |
72 | { "ep1_rx", 10, }, | |
73 | { "ep2_tx", 9, }, | |
74 | { "ep2_rx", 9, }, | |
75 | { "ep3_tx", 3, }, | |
76 | { "ep3_rx", 3, }, | |
77 | { "ep4_tx", 3, }, | |
78 | { "ep4_rx", 3, }, | |
79 | { "ep5_tx", 3, }, | |
80 | { "ep5_rx", 3, }, | |
81 | { "ep6_tx", 3, }, | |
82 | { "ep6_rx", 3, }, | |
83 | { "ep7_tx", 3, }, | |
84 | { "ep7_rx", 3, }, | |
85 | { "ep8_tx", 2, }, | |
86 | { "ep8_rx", 2, }, | |
87 | { "ep9_tx", 2, }, | |
88 | { "ep9_rx", 2, }, | |
89 | { "ep10_tx", 2, }, | |
90 | { "ep10_rx", 2, }, | |
91 | { "ep11_tx", 2, }, | |
92 | { "ep11_rx", 2, }, | |
93 | { "ep12_tx", 2, }, | |
94 | { "ep12_rx", 2, }, | |
95 | { "ep13_tx", 2, }, | |
96 | { "ep13_rx", 2, }, | |
97 | { "ep14_tx", 2, }, | |
98 | { "ep14_rx", 2, }, | |
99 | { "ep15_tx", 2, }, | |
100 | { "ep15_rx", 2, }, | |
101 | }; | |
102 | ||
103 | static struct musb_hdrc_config musb_config = { | |
104 | .multipoint = 1, | |
105 | .dyn_fifo = 1, | |
106 | .soft_con = 1, | |
107 | .dma = 1, | |
108 | .num_eps = 16, | |
109 | .dma_channels = 7, | |
110 | .dma_req_chan = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3), | |
111 | .ram_bits = 12, | |
112 | .eps_bits = musb_eps, | |
113 | }; | |
114 | ||
115 | static struct musb_hdrc_platform_data musb_plat = { | |
116 | #ifdef CONFIG_USB_MUSB_OTG | |
117 | .mode = MUSB_OTG, | |
118 | #elif defined(CONFIG_USB_MUSB_HDRC_HCD) | |
119 | .mode = MUSB_HOST, | |
120 | #elif defined(CONFIG_USB_GADGET_MUSB_HDRC) | |
121 | .mode = MUSB_PERIPHERAL, | |
122 | #endif | |
123 | /* .clock is set dynamically */ | |
124 | .set_clock = musb_set_clock, | |
125 | .config = &musb_config, | |
126 | ||
127 | /* REVISIT charge pump on TWL4030 can supply up to | |
128 | * 100 mA ... but this value is board-specific, like | |
129 | * "mode", and should be passed to usb_musb_init(). | |
130 | */ | |
131 | .power = 50, /* up to 100 mA */ | |
132 | }; | |
133 | ||
134 | static u64 musb_dmamask = DMA_32BIT_MASK; | |
135 | ||
136 | static struct platform_device musb_device = { | |
137 | .name = "musb_hdrc", | |
138 | .id = -1, | |
139 | .dev = { | |
140 | .dma_mask = &musb_dmamask, | |
141 | .coherent_dma_mask = DMA_32BIT_MASK, | |
142 | .platform_data = &musb_plat, | |
143 | }, | |
144 | .num_resources = ARRAY_SIZE(musb_resources), | |
145 | .resource = musb_resources, | |
146 | }; | |
147 | ||
148 | #ifdef CONFIG_NOP_USB_XCEIV | |
149 | static u64 nop_xceiv_dmamask = DMA_32BIT_MASK; | |
150 | ||
151 | static struct platform_device nop_xceiv_device = { | |
152 | .name = "nop_usb_xceiv", | |
153 | .id = -1, | |
154 | .dev = { | |
155 | .dma_mask = &nop_xceiv_dmamask, | |
156 | .coherent_dma_mask = DMA_32BIT_MASK, | |
157 | .platform_data = NULL, | |
158 | }, | |
159 | }; | |
160 | #endif | |
161 | ||
162 | void __init usb_musb_init(void) | |
163 | { | |
164 | if (cpu_is_omap243x()) | |
165 | musb_resources[0].start = OMAP243X_HS_BASE; | |
166 | else | |
167 | musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE; | |
168 | musb_resources[0].end = musb_resources[0].start + SZ_8K - 1; | |
169 | ||
170 | /* | |
171 | * REVISIT: This line can be removed once all the platforms using | |
172 | * musb_core.c have been converted to use use clkdev. | |
173 | */ | |
174 | musb_plat.clock = "ick"; | |
175 | ||
176 | #ifdef CONFIG_NOP_USB_XCEIV | |
177 | if (platform_device_register(&nop_xceiv_device) < 0) { | |
178 | printk(KERN_ERR "Unable to register NOP-XCEIV device\n"); | |
179 | return; | |
180 | } | |
181 | #endif | |
182 | ||
183 | if (platform_device_register(&musb_device) < 0) { | |
184 | printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n"); | |
185 | return; | |
186 | } | |
187 | } |