aboutsummaryrefslogtreecommitdiff
path: root/board/gdsys/common/adv7611.c
blob: c416bf1dc42cfbccd700727c152095a142ca285f (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
171
172
173
174
175
176
// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2014
 * Dirk Eibach, Guntermann & Drunck GmbH, dirk.eibach@gdsys.cc
 */

#include <common.h>
#include <i2c.h>

#define ADV7611_I2C_ADDR 0x4c
#define ADV7611_RDINFO 0x2051

/*
 * ADV7611 I2C Addresses in u-boot notation
 */
enum {
	CP_I2C_ADDR = 0x22,
	DPLL_I2C_ADDR = 0x26,
	KSV_I2C_ADDR = 0x32,
	HDMI_I2C_ADDR = 0x34,
	EDID_I2C_ADDR = 0x36,
	INFOFRAME_I2C_ADDR = 0x3e,
	CEC_I2C_ADDR = 0x40,
	IO_I2C_ADDR = ADV7611_I2C_ADDR,
};

/*
 * Global Control Registers
 */
enum {
	IO_RD_INFO_MSB = 0xea,
	IO_RD_INFO_LSB = 0xeb,
	IO_CEC_ADDR = 0xf4,
	IO_INFOFRAME_ADDR = 0xf5,
	IO_DPLL_ADDR = 0xf8,
	IO_KSV_ADDR = 0xf9,
	IO_EDID_ADDR = 0xfa,
	IO_HDMI_ADDR = 0xfb,
	IO_CP_ADDR = 0xfd,
};

int adv7611_i2c[] = CONFIG_SYS_ADV7611_I2C;

int adv7611_probe(unsigned int screen)
{
	int old_bus = i2c_get_bus_num();
	unsigned int rd_info;
	int res = 0;

	i2c_set_bus_num(adv7611_i2c[screen]);

	rd_info = (i2c_reg_read(IO_I2C_ADDR, IO_RD_INFO_MSB) << 8)
		  | i2c_reg_read(IO_I2C_ADDR, IO_RD_INFO_LSB);

	if (rd_info != ADV7611_RDINFO) {
		res = -1;
		goto out;
	}

	/*
	 * set I2C addresses to default values
	 */
	i2c_reg_write(IO_I2C_ADDR, IO_CEC_ADDR, CEC_I2C_ADDR << 1);
	i2c_reg_write(IO_I2C_ADDR, IO_INFOFRAME_ADDR, INFOFRAME_I2C_ADDR << 1);
	i2c_reg_write(IO_I2C_ADDR, IO_DPLL_ADDR, DPLL_I2C_ADDR << 1);
	i2c_reg_write(IO_I2C_ADDR, IO_KSV_ADDR, KSV_I2C_ADDR << 1);
	i2c_reg_write(IO_I2C_ADDR, IO_EDID_ADDR, EDID_I2C_ADDR << 1);
	i2c_reg_write(IO_I2C_ADDR, IO_HDMI_ADDR, HDMI_I2C_ADDR << 1);
	i2c_reg_write(IO_I2C_ADDR, IO_CP_ADDR, CP_I2C_ADDR << 1);

	/*
	 * do magic initialization sequence from
	 * "ADV7611 Register Settings Recommendations Revision 1.5"
	 * with most registers undocumented
	 */
	i2c_reg_write(CP_I2C_ADDR, 0x6c, 0x00);
	i2c_reg_write(HDMI_I2C_ADDR, 0x9b, 0x03);
	i2c_reg_write(HDMI_I2C_ADDR, 0x6f, 0x08);
	i2c_reg_write(HDMI_I2C_ADDR, 0x85, 0x1f);
	i2c_reg_write(HDMI_I2C_ADDR, 0x87, 0x70);
	i2c_reg_write(HDMI_I2C_ADDR, 0x57, 0xda);
	i2c_reg_write(HDMI_I2C_ADDR, 0x58, 0x01);
	i2c_reg_write(HDMI_I2C_ADDR, 0x03, 0x98);
	i2c_reg_write(HDMI_I2C_ADDR, 0x4c, 0x44);

	/*
	 * IO_REG_02, default 0xf0
	 *
	 * INP_COLOR_SPACE (IO, Address 0x02[7:4])
	 * default: 0b1111 auto
	 * set to : 0b0001 force RGB (range 0 to 255) input
	 *
	 * RGB_OUT (IO, Address 0x02[1])
	 * default: 0 YPbPr color space output
	 * set to : 1 RGB color space output
	 */
	i2c_reg_write(IO_I2C_ADDR, 0x02, 0x12);

	/*
	 * IO_REG_03, default 0x00
	 *
	 * OP_FORMAT_SEL (IO, Address 0x03[7:0])
	 * default: 0x00 8-bit SDR ITU-656 mode
	 * set to : 0x40 24-bit 4:4:4 SDR mode
	 */
	i2c_reg_write(IO_I2C_ADDR, 0x03, 0x40);

	/*
	 * IO_REG_05, default 0x2c
	 *
	 * AVCODE_INSERT_EN (IO, Address 0x05[2])
	 * default: 1 insert AV codes into data stream
	 * set to : 0 do not insert AV codes into data stream
	 */
	i2c_reg_write(IO_I2C_ADDR, 0x05, 0x28);

	/*
	 * IO_REG_0C, default 0x62
	 *
	 * POWER_DOWN (IO, Address 0x0C[5])
	 * default: 1 chip is powered down
	 * set to : 0 chip is operational
	 */
	i2c_reg_write(IO_I2C_ADDR, 0x0c, 0x42);

	/*
	 * IO_REG_15, default 0xbe
	 *
	 * TRI_SYNCS (IO, Address 0x15[3)
	 * TRI_LLC (IO, Address 0x15[2])
	 * TRI_PIX (IO, Address 0x15[1])
	 * default: 1 video output pins are tristate
	 * set to : 0 video output pins are active
	 */
	i2c_reg_write(IO_I2C_ADDR, 0x15, 0xb0);

	/*
	 * HDMI_REGISTER_02H, default 0xff
	 *
	 * CLOCK_TERMA_DISABLE (HDMI, Address 0x83[0])
	 * default: 1 disable termination
	 * set to : 0 enable termination
	 * Future options are:
	 * - use the chips automatic termination control
	 * - set this manually on cable detect
	 * but at the moment this seems a safe default.
	 */
	i2c_reg_write(HDMI_I2C_ADDR, 0x83, 0xfe);

	/*
	 * HDMI_CP_CNTRL_1, default 0x01
	 *
	 * HDMI_FRUN_EN (CP, Address 0xBA[0])
	 * default: 1 Enable the free run feature in HDMI mode
	 * set to : 0 Disable the free run feature in HDMI mode
	 */
	i2c_reg_write(CP_I2C_ADDR, 0xba, 0x00);

	/*
	 * INT1_CONFIGURATION, default 0x20
	 *
	 * INTRQ_DUR_SEL[1:0] (IO, Address 0x40[7:6])
	 * default: 00 Interrupt signal is active for 4 Xtal periods
	 * set to : 11 Active until cleared
	 *
	 * INTRQ_OP_SEL[1:0] (IO, Address 0x40[1:0])
	 * default: 00 Open drain
	 * set to : 10 Drives high when active
	 */
	i2c_reg_write(IO_I2C_ADDR, 0x40, 0xc2);

out:
	i2c_set_bus_num(old_bus);

	return res;
}