summaryrefslogtreecommitdiff
path: root/arch/arm/mach-imx/anatop.c
blob: 231bb250c5719d21962404a9301765cdcf499924 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
/*
 * Copyright (C) 2013-2015 Freescale Semiconductor, Inc.
 *
 * The code contained herein is licensed under the GNU General Public
 * License. You may obtain a copy of the GNU General Public License
 * Version 2 or later at the following locations:
 *
 * http://www.opensource.org/licenses/gpl-license.html
 * http://www.gnu.org/copyleft/gpl.html
 */

#include <linux/err.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include "common.h"
#include "hardware.h"

#define REG_SET		0x4
#define REG_CLR		0x8

#define ANADIG_REG_2P5		0x130
#define ANADIG_REG_CORE		0x140
#define ANADIG_ANA_MISC0	0x150
#define ANADIG_USB1_CHRG_DETECT	0x1b0
#define ANADIG_USB2_CHRG_DETECT	0x210
#define ANADIG_DIGPROG		0x260
#define ANADIG_DIGPROG_IMX6SL	0x280
#define ANADIG_DIGPROG_IMX7D	0x800

#define BM_ANADIG_REG_2P5_ENABLE_WEAK_LINREG	0x40000
#define BM_ANADIG_REG_2P5_ENABLE_PULLDOWN	0x8
#define BM_ANADIG_REG_CORE_FET_ODRIVE		0x20000000
#define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG	0x1000
/* Below MISC0_DISCON_HIGH_SNVS is only for i.MX6SL */
#define BM_ANADIG_ANA_MISC0_DISCON_HIGH_SNVS	0x2000
#define BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B	0x80000
#define BM_ANADIG_USB_CHRG_DETECT_EN_B		0x100000

static struct regmap *anatop;

static void imx_anatop_enable_weak2p5(bool enable)
{
	u32 reg, val;

	regmap_read(anatop, ANADIG_ANA_MISC0, &val);

	/* can only be enabled when stop_mode_config is clear. */
	reg = ANADIG_REG_2P5;
	reg += (enable && (val & BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG) == 0) ?
		REG_SET : REG_CLR;
	regmap_write(anatop, reg, BM_ANADIG_REG_2P5_ENABLE_WEAK_LINREG);
}

static void imx_anatop_enable_fet_odrive(bool enable)
{
	regmap_write(anatop, ANADIG_REG_CORE + (enable ? REG_SET : REG_CLR),
		BM_ANADIG_REG_CORE_FET_ODRIVE);
}

static inline void imx_anatop_enable_2p5_pulldown(bool enable)
{
	regmap_write(anatop, ANADIG_REG_2P5 + (enable ? REG_SET : REG_CLR),
		BM_ANADIG_REG_2P5_ENABLE_PULLDOWN);
}

static inline void imx_anatop_disconnect_high_snvs(bool enable)
{
	regmap_write(anatop, ANADIG_ANA_MISC0 + (enable ? REG_SET : REG_CLR),
		BM_ANADIG_ANA_MISC0_DISCON_HIGH_SNVS);
}

void imx_anatop_pre_suspend(void)
{
	if (imx_mmdc_get_ddr_type() == IMX_DDR_TYPE_LPDDR2)
		imx_anatop_enable_2p5_pulldown(true);
	else
		imx_anatop_enable_weak2p5(true);

	imx_anatop_enable_fet_odrive(true);

	if (cpu_is_imx6sl())
		imx_anatop_disconnect_high_snvs(true);
}

void imx_anatop_post_resume(void)
{
	if (imx_mmdc_get_ddr_type() == IMX_DDR_TYPE_LPDDR2)
		imx_anatop_enable_2p5_pulldown(false);
	else
		imx_anatop_enable_weak2p5(false);

	imx_anatop_enable_fet_odrive(false);

	if (cpu_is_imx6sl())
		imx_anatop_disconnect_high_snvs(false);

}

static void imx_anatop_usb_chrg_detect_disable(void)
{
	regmap_write(anatop, ANADIG_USB1_CHRG_DETECT,
		BM_ANADIG_USB_CHRG_DETECT_EN_B
		| BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B);
	regmap_write(anatop, ANADIG_USB2_CHRG_DETECT,
		BM_ANADIG_USB_CHRG_DETECT_EN_B |
		BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B);
}

void __init imx_init_revision_from_anatop(void)
{
	struct device_node *np;
	void __iomem *anatop_base;
	unsigned int revision;
	u32 digprog;
	u16 offset = ANADIG_DIGPROG;

	np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-anatop");
	anatop_base = of_iomap(np, 0);
	WARN_ON(!anatop_base);
	if (of_device_is_compatible(np, "fsl,imx6sl-anatop"))
		offset = ANADIG_DIGPROG_IMX6SL;
	if (of_device_is_compatible(np, "fsl,imx7d-anatop"))
		offset = ANADIG_DIGPROG_IMX7D;
	digprog = readl_relaxed(anatop_base + offset);
	iounmap(anatop_base);

	switch (digprog & 0xff) {
	case 0:
		revision = IMX_CHIP_REVISION_1_0;
		break;
	case 1:
		revision = IMX_CHIP_REVISION_1_1;
		break;
	case 2:
		revision = IMX_CHIP_REVISION_1_2;
		break;
	case 3:
		revision = IMX_CHIP_REVISION_1_3;
		break;
	case 4:
		revision = IMX_CHIP_REVISION_1_4;
		break;
	case 5:
		/*
		 * i.MX6DQ TO1.5 is defined as Rev 1.3 in Data Sheet, marked
		 * as 'D' in Part Number last character.
		 */
		revision = IMX_CHIP_REVISION_1_5;
		break;
	default:
		revision = IMX_CHIP_REVISION_UNKNOWN;
	}

	mxc_set_cpu_type(digprog >> 16 & 0xff);
	imx_set_soc_revision(revision);
}

void __init imx_anatop_init(void)
{
	anatop = syscon_regmap_lookup_by_compatible("fsl,imx6q-anatop");
	if (IS_ERR(anatop)) {
		pr_err("%s: failed to find imx6q-anatop regmap!\n", __func__);
		return;
	}

	imx_anatop_usb_chrg_detect_disable();
}