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Merge branch 'master' of git://git.denx.de/u-boot-marvell
[karo-tx-uboot.git] / drivers / usb / musb / omap3.c
1 /*
2  * Copyright (c) 2009 Wind River Systems, Inc.
3  * Tom Rix <Tom.Rix@windriver.com>
4  *
5  * This is file is based on
6  * repository git.gitorious.org/u-boot-omap3/mainline.git,
7  * branch omap3-dev-usb, file drivers/usb/host/omap3530_usb.c
8  *
9  * This is the unique part of its copyright :
10  *
11  * ------------------------------------------------------------------------
12  *
13  * Copyright (c) 2009 Texas Instruments
14  *
15  * ------------------------------------------------------------------------
16  *
17  * This program is free software; you can redistribute it and/or
18  * modify it under the terms of the GNU General Public License as
19  * published by the Free Software Foundation; either version 2 of
20  * the License, or (at your option) any later version.
21  *
22  * This program is distributed in the hope that it will be useful,
23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25  * GNU General Public License for more details.
26  *
27  * You should have received a copy of the GNU General Public License
28  * along with this program; if not, write to the Free Software
29  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30  * MA 02111-1307 USA
31  */
32
33 #include <twl4030.h>
34 #include <twl6030.h>
35 #include "omap3.h"
36
37 static int platform_needs_initialization = 1;
38
39 struct musb_config musb_cfg = {
40         .regs           = (struct musb_regs *)MENTOR_USB0_BASE,
41         .timeout        = OMAP3_USB_TIMEOUT,
42         .musb_speed     = 0,
43 };
44
45 /*
46  * OMAP3 USB OTG registers.
47  */
48 struct omap3_otg_regs {
49         u32     revision;
50         u32     sysconfig;
51         u32     sysstatus;
52         u32     interfsel;
53         u32     simenable;
54         u32     forcestdby;
55 };
56
57 static struct omap3_otg_regs *otg;
58
59 #define OMAP3_OTG_SYSCONFIG_SMART_STANDBY_MODE          0x2000
60 #define OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE             0x1000
61 #define OMAP3_OTG_SYSCONFIG_SMART_IDLE_MODE             0x0010
62 #define OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE                0x0008
63 #define OMAP3_OTG_SYSCONFIG_ENABLEWAKEUP                0x0004
64 #define OMAP3_OTG_SYSCONFIG_SOFTRESET                   0x0002
65 #define OMAP3_OTG_SYSCONFIG_AUTOIDLE                    0x0001
66
67 #define OMAP3_OTG_SYSSTATUS_RESETDONE                   0x0001
68
69 /* OMAP4430 has an internal PHY, use it */
70 #ifdef CONFIG_OMAP4430
71 #define OMAP3_OTG_INTERFSEL_OMAP                        0x0000
72 #else
73 #define OMAP3_OTG_INTERFSEL_OMAP                        0x0001
74 #endif
75
76 #define OMAP3_OTG_FORCESTDBY_STANDBY                    0x0001
77
78
79 #ifdef DEBUG_MUSB_OMAP3
80 static void musb_db_otg_regs(void)
81 {
82         u32 l;
83         l = readl(&otg->revision);
84         serial_printf("OTG_REVISION 0x%x\n", l);
85         l = readl(&otg->sysconfig);
86         serial_printf("OTG_SYSCONFIG 0x%x\n", l);
87         l = readl(&otg->sysstatus);
88         serial_printf("OTG_SYSSTATUS 0x%x\n", l);
89         l = readl(&otg->interfsel);
90         serial_printf("OTG_INTERFSEL 0x%x\n", l);
91         l = readl(&otg->forcestdby);
92         serial_printf("OTG_FORCESTDBY 0x%x\n", l);
93 }
94 #endif
95
96 int musb_platform_init(void)
97 {
98         int ret = -1;
99
100         if (platform_needs_initialization) {
101                 u32 stdby;
102
103                 /*
104                  * OMAP3EVM uses ISP1504 phy and so
105                  * twl4030 related init is not required.
106                  */
107 #ifdef CONFIG_TWL4030_USB
108                 if (twl4030_usb_ulpi_init()) {
109                         serial_printf("ERROR: %s Could not initialize PHY\n",
110                                 __PRETTY_FUNCTION__);
111                         goto end;
112                 }
113 #endif
114
115 #ifdef CONFIG_TWL6030_POWER
116                 twl6030_usb_device_settings();
117 #endif
118
119                 otg = (struct omap3_otg_regs *)OMAP3_OTG_BASE;
120
121                 /* Set OTG to always be on */
122                 writel(OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE |
123                        OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE, &otg->sysconfig);
124
125                 /* Set the interface */
126                 writel(OMAP3_OTG_INTERFSEL_OMAP, &otg->interfsel);
127
128                 /* Clear force standby */
129                 stdby = readl(&otg->forcestdby);
130                 stdby &= ~OMAP3_OTG_FORCESTDBY_STANDBY;
131                 writel(stdby, &otg->forcestdby);
132
133 #ifdef CONFIG_OMAP3_EVM
134                 musb_cfg.extvbus = omap3_evm_need_extvbus();
135 #endif
136
137 #ifdef CONFIG_OMAP4430
138                 u32 *usbotghs_control = (u32 *)(CTRL_BASE + 0x33C);
139                 *usbotghs_control = 0x15;
140 #endif
141                 platform_needs_initialization = 0;
142         }
143
144         ret = platform_needs_initialization;
145
146 #ifdef CONFIG_TWL4030_USB
147 end:
148 #endif
149         return ret;
150
151 }
152
153 void musb_platform_deinit(void)
154 {
155         /* noop */
156 }