xref: /openbmc/u-boot/drivers/usb/musb/omap3.c (revision e8f80a5a)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (c) 2009 Wind River Systems, Inc.
4  * Tom Rix <Tom.Rix@windriver.com>
5  *
6  * This is file is based on
7  * repository git.gitorious.org/u-boot-omap3/mainline.git,
8  * branch omap3-dev-usb, file drivers/usb/host/omap3530_usb.c
9  *
10  * This is the unique part of its copyright :
11  *
12  * ------------------------------------------------------------------------
13  *
14  * Copyright (c) 2009 Texas Instruments
15  *
16  * ------------------------------------------------------------------------
17  */
18 
19 #include <asm/omap_common.h>
20 #include <twl4030.h>
21 #include <twl6030.h>
22 #include "omap3.h"
23 
24 static int platform_needs_initialization = 1;
25 
26 struct musb_config musb_cfg = {
27 	.regs		= (struct musb_regs *)MENTOR_USB0_BASE,
28 	.timeout	= OMAP3_USB_TIMEOUT,
29 	.musb_speed	= 0,
30 };
31 
32 /*
33  * OMAP3 USB OTG registers.
34  */
35 struct omap3_otg_regs {
36 	u32	revision;
37 	u32	sysconfig;
38 	u32	sysstatus;
39 	u32	interfsel;
40 	u32	simenable;
41 	u32	forcestdby;
42 };
43 
44 static struct omap3_otg_regs *otg;
45 
46 #define OMAP3_OTG_SYSCONFIG_SMART_STANDBY_MODE		0x2000
47 #define OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE		0x1000
48 #define OMAP3_OTG_SYSCONFIG_SMART_IDLE_MODE		0x0010
49 #define OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE		0x0008
50 #define OMAP3_OTG_SYSCONFIG_ENABLEWAKEUP		0x0004
51 #define OMAP3_OTG_SYSCONFIG_SOFTRESET			0x0002
52 #define OMAP3_OTG_SYSCONFIG_AUTOIDLE			0x0001
53 
54 #define OMAP3_OTG_SYSSTATUS_RESETDONE			0x0001
55 
56 /* OMAP4430 has an internal PHY, use it */
57 #ifdef CONFIG_OMAP44XX
58 #define OMAP3_OTG_INTERFSEL_OMAP			0x0000
59 #else
60 #define OMAP3_OTG_INTERFSEL_OMAP			0x0001
61 #endif
62 
63 #define OMAP3_OTG_FORCESTDBY_STANDBY			0x0001
64 
65 
66 #ifdef DEBUG_MUSB_OMAP3
musb_db_otg_regs(void)67 static void musb_db_otg_regs(void)
68 {
69 	u32 l;
70 	l = readl(&otg->revision);
71 	serial_printf("OTG_REVISION 0x%x\n", l);
72 	l = readl(&otg->sysconfig);
73 	serial_printf("OTG_SYSCONFIG 0x%x\n", l);
74 	l = readl(&otg->sysstatus);
75 	serial_printf("OTG_SYSSTATUS 0x%x\n", l);
76 	l = readl(&otg->interfsel);
77 	serial_printf("OTG_INTERFSEL 0x%x\n", l);
78 	l = readl(&otg->forcestdby);
79 	serial_printf("OTG_FORCESTDBY 0x%x\n", l);
80 }
81 #endif
82 
musb_platform_init(void)83 int musb_platform_init(void)
84 {
85 	int ret = -1;
86 
87 	if (platform_needs_initialization) {
88 		u32 stdby;
89 
90 		/*
91 		 * OMAP3EVM uses ISP1504 phy and so
92 		 * twl4030 related init is not required.
93 		 */
94 #ifdef CONFIG_TWL4030_USB
95 		if (twl4030_usb_ulpi_init()) {
96 			serial_printf("ERROR: %s Could not initialize PHY\n",
97 				__PRETTY_FUNCTION__);
98 			goto end;
99 		}
100 #endif
101 
102 #ifdef CONFIG_TWL6030_POWER
103 		twl6030_usb_device_settings();
104 #endif
105 
106 		otg = (struct omap3_otg_regs *)OMAP3_OTG_BASE;
107 
108 		/* Set OTG to always be on */
109 		writel(OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE |
110 		       OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE, &otg->sysconfig);
111 
112 		/* Set the interface */
113 		writel(OMAP3_OTG_INTERFSEL_OMAP, &otg->interfsel);
114 
115 		/* Clear force standby */
116 		stdby = readl(&otg->forcestdby);
117 		stdby &= ~OMAP3_OTG_FORCESTDBY_STANDBY;
118 		writel(stdby, &otg->forcestdby);
119 
120 #ifdef CONFIG_TARGET_OMAP3_EVM
121 		musb_cfg.extvbus = omap3_evm_need_extvbus();
122 #endif
123 
124 #ifdef CONFIG_OMAP44XX
125 		u32 *usbotghs_control =
126 			(u32 *)((*ctrl)->control_usbotghs_ctrl);
127 		*usbotghs_control = 0x15;
128 #endif
129 		platform_needs_initialization = 0;
130 	}
131 
132 	ret = platform_needs_initialization;
133 
134 #ifdef CONFIG_TWL4030_USB
135 end:
136 #endif
137 	return ret;
138 
139 }
140 
musb_platform_deinit(void)141 void musb_platform_deinit(void)
142 {
143 	/* noop */
144 }
145