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 <serial.h>
20#include <asm/omap_common.h>
21#include <twl4030.h>
22#include <twl6030.h>
23#include "omap3.h"
24
25static int platform_needs_initialization = 1;
26
27struct musb_config musb_cfg = {
28	.regs		= (struct musb_regs *)MENTOR_USB0_BASE,
29	.timeout	= OMAP3_USB_TIMEOUT,
30	.musb_speed	= 0,
31};
32
33/*
34 * OMAP3 USB OTG registers.
35 */
36struct omap3_otg_regs {
37	u32	revision;
38	u32	sysconfig;
39	u32	sysstatus;
40	u32	interfsel;
41	u32	simenable;
42	u32	forcestdby;
43};
44
45static struct omap3_otg_regs *otg;
46
47#define OMAP3_OTG_SYSCONFIG_SMART_STANDBY_MODE		0x2000
48#define OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE		0x1000
49#define OMAP3_OTG_SYSCONFIG_SMART_IDLE_MODE		0x0010
50#define OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE		0x0008
51#define OMAP3_OTG_SYSCONFIG_ENABLEWAKEUP		0x0004
52#define OMAP3_OTG_SYSCONFIG_SOFTRESET			0x0002
53#define OMAP3_OTG_SYSCONFIG_AUTOIDLE			0x0001
54
55#define OMAP3_OTG_SYSSTATUS_RESETDONE			0x0001
56
57/* OMAP4430 has an internal PHY, use it */
58#ifdef CONFIG_OMAP44XX
59#define OMAP3_OTG_INTERFSEL_OMAP			0x0000
60#else
61#define OMAP3_OTG_INTERFSEL_OMAP			0x0001
62#endif
63
64#define OMAP3_OTG_FORCESTDBY_STANDBY			0x0001
65
66
67#ifdef DEBUG_MUSB_OMAP3
68static void musb_db_otg_regs(void)
69{
70	u32 l;
71	l = readl(&otg->revision);
72	serial_printf("OTG_REVISION 0x%x\n", l);
73	l = readl(&otg->sysconfig);
74	serial_printf("OTG_SYSCONFIG 0x%x\n", l);
75	l = readl(&otg->sysstatus);
76	serial_printf("OTG_SYSSTATUS 0x%x\n", l);
77	l = readl(&otg->interfsel);
78	serial_printf("OTG_INTERFSEL 0x%x\n", l);
79	l = readl(&otg->forcestdby);
80	serial_printf("OTG_FORCESTDBY 0x%x\n", l);
81}
82#endif
83
84int musb_platform_init(void)
85{
86	int ret = -1;
87
88	if (platform_needs_initialization) {
89		u32 stdby;
90
91		/*
92		 * OMAP3EVM uses ISP1504 phy and so
93		 * twl4030 related init is not required.
94		 */
95#ifdef CONFIG_TWL4030_USB
96		if (twl4030_usb_ulpi_init()) {
97			serial_printf("ERROR: %s Could not initialize PHY\n",
98				__PRETTY_FUNCTION__);
99			goto end;
100		}
101#endif
102
103#ifdef CONFIG_TWL6030_POWER
104		twl6030_usb_device_settings();
105#endif
106
107		otg = (struct omap3_otg_regs *)OMAP3_OTG_BASE;
108
109		/* Set OTG to always be on */
110		writel(OMAP3_OTG_SYSCONFIG_NO_STANDBY_MODE |
111		       OMAP3_OTG_SYSCONFIG_NO_IDLE_MODE, &otg->sysconfig);
112
113		/* Set the interface */
114		writel(OMAP3_OTG_INTERFSEL_OMAP, &otg->interfsel);
115
116		/* Clear force standby */
117		stdby = readl(&otg->forcestdby);
118		stdby &= ~OMAP3_OTG_FORCESTDBY_STANDBY;
119		writel(stdby, &otg->forcestdby);
120
121#ifdef CONFIG_TARGET_OMAP3_EVM
122		musb_cfg.extvbus = omap3_evm_need_extvbus();
123#endif
124
125#ifdef CONFIG_OMAP44XX
126		u32 *usbotghs_control =
127			(u32 *)((*ctrl)->control_usbotghs_ctrl);
128		*usbotghs_control = 0x15;
129#endif
130		platform_needs_initialization = 0;
131	}
132
133	ret = platform_needs_initialization;
134
135#ifdef CONFIG_TWL4030_USB
136end:
137#endif
138	return ret;
139
140}
141
142void musb_platform_deinit(void)
143{
144	/* noop */
145}
146