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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> | |
3a0d30bc | 31 | #include <mach/am35xx.h> |
ce491cf8 | 32 | #include <plat/usb.h> |
a9c03783 | 33 | #include "control.h" |
18cb7aca | 34 | |
7c925546 | 35 | #if defined(CONFIG_USB_MUSB_OMAP2PLUS) || defined (CONFIG_USB_MUSB_AM35X) |
94a3ef6f | 36 | |
a9c03783 AKG |
37 | static void am35x_musb_reset(void) |
38 | { | |
39 | u32 regval; | |
40 | ||
41 | /* Reset the musb interface */ | |
42 | regval = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET); | |
43 | ||
44 | regval |= AM35XX_USBOTGSS_SW_RST; | |
45 | omap_ctrl_writel(regval, AM35XX_CONTROL_IP_SW_RESET); | |
46 | ||
47 | regval &= ~AM35XX_USBOTGSS_SW_RST; | |
48 | omap_ctrl_writel(regval, AM35XX_CONTROL_IP_SW_RESET); | |
49 | ||
50 | regval = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET); | |
51 | } | |
52 | ||
53 | static void am35x_musb_phy_power(u8 on) | |
54 | { | |
55 | unsigned long timeout = jiffies + msecs_to_jiffies(100); | |
56 | u32 devconf2; | |
57 | ||
58 | if (on) { | |
59 | /* | |
60 | * Start the on-chip PHY and its PLL. | |
61 | */ | |
62 | devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2); | |
63 | ||
64 | devconf2 &= ~(CONF2_RESET | CONF2_PHYPWRDN | CONF2_OTGPWRDN); | |
65 | devconf2 |= CONF2_PHY_PLLON; | |
66 | ||
67 | omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2); | |
68 | ||
69 | pr_info(KERN_INFO "Waiting for PHY clock good...\n"); | |
70 | while (!(omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2) | |
71 | & CONF2_PHYCLKGD)) { | |
72 | cpu_relax(); | |
73 | ||
74 | if (time_after(jiffies, timeout)) { | |
75 | pr_err(KERN_ERR "musb PHY clock good timed out\n"); | |
76 | break; | |
77 | } | |
78 | } | |
79 | } else { | |
80 | /* | |
81 | * Power down the on-chip PHY. | |
82 | */ | |
83 | devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2); | |
84 | ||
85 | devconf2 &= ~CONF2_PHY_PLLON; | |
86 | devconf2 |= CONF2_PHYPWRDN | CONF2_OTGPWRDN; | |
87 | omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2); | |
88 | } | |
89 | } | |
90 | ||
91 | static void am35x_musb_clear_irq(void) | |
92 | { | |
93 | u32 regval; | |
94 | ||
95 | regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR); | |
96 | regval |= AM35XX_USBOTGSS_INT_CLR; | |
97 | omap_ctrl_writel(regval, AM35XX_CONTROL_LVL_INTR_CLEAR); | |
98 | regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR); | |
99 | } | |
100 | ||
101 | static void am35x_musb_set_mode(u8 musb_mode) | |
102 | { | |
103 | u32 devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2); | |
104 | ||
105 | devconf2 &= ~CONF2_OTGMODE; | |
106 | switch (musb_mode) { | |
107 | #ifdef CONFIG_USB_MUSB_HDRC_HCD | |
108 | case MUSB_HOST: /* Force VBUS valid, ID = 0 */ | |
109 | devconf2 |= CONF2_FORCE_HOST; | |
110 | break; | |
111 | #endif | |
112 | #ifdef CONFIG_USB_GADGET_MUSB_HDRC | |
113 | case MUSB_PERIPHERAL: /* Force VBUS valid, ID = 1 */ | |
114 | devconf2 |= CONF2_FORCE_DEVICE; | |
115 | break; | |
116 | #endif | |
117 | #ifdef CONFIG_USB_MUSB_OTG | |
118 | case MUSB_OTG: /* Don't override the VBUS/ID comparators */ | |
119 | devconf2 |= CONF2_NO_OVERRIDE; | |
120 | break; | |
121 | #endif | |
122 | default: | |
123 | pr_info(KERN_INFO "Unsupported mode %u\n", musb_mode); | |
124 | } | |
125 | ||
126 | omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2); | |
127 | } | |
128 | ||
18cb7aca FB |
129 | static struct resource musb_resources[] = { |
130 | [0] = { /* start and end set dynamically */ | |
131 | .flags = IORESOURCE_MEM, | |
132 | }, | |
133 | [1] = { /* general IRQ */ | |
134 | .start = INT_243X_HS_USB_MC, | |
135 | .flags = IORESOURCE_IRQ, | |
fcf173e4 | 136 | .name = "mc", |
18cb7aca FB |
137 | }, |
138 | [2] = { /* DMA IRQ */ | |
139 | .start = INT_243X_HS_USB_DMA, | |
140 | .flags = IORESOURCE_IRQ, | |
fcf173e4 | 141 | .name = "dma", |
18cb7aca FB |
142 | }, |
143 | }; | |
144 | ||
18cb7aca FB |
145 | static struct musb_hdrc_config musb_config = { |
146 | .multipoint = 1, | |
147 | .dyn_fifo = 1, | |
18cb7aca | 148 | .num_eps = 16, |
18cb7aca | 149 | .ram_bits = 12, |
18cb7aca FB |
150 | }; |
151 | ||
152 | static struct musb_hdrc_platform_data musb_plat = { | |
153 | #ifdef CONFIG_USB_MUSB_OTG | |
154 | .mode = MUSB_OTG, | |
155 | #elif defined(CONFIG_USB_MUSB_HDRC_HCD) | |
156 | .mode = MUSB_HOST, | |
157 | #elif defined(CONFIG_USB_GADGET_MUSB_HDRC) | |
158 | .mode = MUSB_PERIPHERAL, | |
159 | #endif | |
160 | /* .clock is set dynamically */ | |
18cb7aca FB |
161 | .config = &musb_config, |
162 | ||
163 | /* REVISIT charge pump on TWL4030 can supply up to | |
164 | * 100 mA ... but this value is board-specific, like | |
165 | * "mode", and should be passed to usb_musb_init(). | |
166 | */ | |
167 | .power = 50, /* up to 100 mA */ | |
168 | }; | |
169 | ||
e930438c | 170 | static u64 musb_dmamask = DMA_BIT_MASK(32); |
18cb7aca FB |
171 | |
172 | static struct platform_device musb_device = { | |
dc09886b | 173 | .name = "musb-omap2430", |
18cb7aca FB |
174 | .id = -1, |
175 | .dev = { | |
176 | .dma_mask = &musb_dmamask, | |
e930438c | 177 | .coherent_dma_mask = DMA_BIT_MASK(32), |
18cb7aca FB |
178 | .platform_data = &musb_plat, |
179 | }, | |
180 | .num_resources = ARRAY_SIZE(musb_resources), | |
181 | .resource = musb_resources, | |
182 | }; | |
183 | ||
884b8369 | 184 | void __init usb_musb_init(struct omap_musb_board_data *board_data) |
18cb7aca | 185 | { |
bce06683 | 186 | if (cpu_is_omap243x()) { |
18cb7aca | 187 | musb_resources[0].start = OMAP243X_HS_BASE; |
3a0d30bc | 188 | } else if (cpu_is_omap3517() || cpu_is_omap3505()) { |
ce40c576 | 189 | musb_device.name = "musb-am35x"; |
3a0d30bc AKG |
190 | musb_resources[0].start = AM35XX_IPSS_USBOTGSS_BASE; |
191 | musb_resources[1].start = INT_35XX_USBOTG_IRQ; | |
a9c03783 AKG |
192 | board_data->set_phy_power = am35x_musb_phy_power; |
193 | board_data->clear_irq = am35x_musb_clear_irq; | |
194 | board_data->set_mode = am35x_musb_set_mode; | |
195 | board_data->reset = am35x_musb_reset; | |
bce06683 | 196 | } else if (cpu_is_omap34xx()) { |
18cb7aca | 197 | musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE; |
bce06683 MM |
198 | } else if (cpu_is_omap44xx()) { |
199 | musb_resources[0].start = OMAP44XX_HSUSB_OTG_BASE; | |
5772ca7d SS |
200 | musb_resources[1].start = OMAP44XX_IRQ_HS_USB_MC_N; |
201 | musb_resources[2].start = OMAP44XX_IRQ_HS_USB_DMA_N; | |
bce06683 | 202 | } |
f9828552 | 203 | musb_resources[0].end = musb_resources[0].start + SZ_4K - 1; |
18cb7aca FB |
204 | |
205 | /* | |
206 | * REVISIT: This line can be removed once all the platforms using | |
207 | * musb_core.c have been converted to use use clkdev. | |
208 | */ | |
209 | musb_plat.clock = "ick"; | |
884b8369 MM |
210 | musb_plat.board_data = board_data; |
211 | musb_plat.power = board_data->power >> 1; | |
212 | musb_plat.mode = board_data->mode; | |
58815fa3 | 213 | musb_plat.extvbus = board_data->extvbus; |
18cb7aca | 214 | |
bdfa3511 | 215 | if (platform_device_register(&musb_device) < 0) |
18cb7aca | 216 | printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n"); |
fb91cde4 HH |
217 | |
218 | if (cpu_is_omap44xx()) | |
219 | omap4430_phy_init(dev); | |
220 | ||
94a3ef6f PDS |
221 | } |
222 | ||
223 | #else | |
884b8369 | 224 | void __init usb_musb_init(struct omap_musb_board_data *board_data) |
94a3ef6f | 225 | { |
18cb7aca | 226 | } |
94a3ef6f | 227 | #endif /* CONFIG_USB_MUSB_SOC */ |