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1// SPDX-License-Identifier: GPL-2.0-or-later
2
3/*
4 *
5 * cx88-i2c.c -- all the i2c code is here
6 *
7 * Copyright (C) 1996,97,98 Ralph Metzler (rjkm@thp.uni-koeln.de)
8 * & Marcus Metzler (mocm@thp.uni-koeln.de)
9 * (c) 2002 Yurij Sysoev <yurij@naturesoft.net>
10 * (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>
11 * (c) 2005 Mauro Carvalho Chehab <mchehab@kernel.org>
12 * - Multituner support and i2c address binding
13 */
14
15#include "cx88.h"
16
17#include <linux/init.h>
18#include <linux/io.h>
19#include <linux/module.h>
20
21#include <media/v4l2-common.h>
22
23static unsigned int i2c_debug;
24module_param(i2c_debug, int, 0644);
25MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
26
27static unsigned int i2c_scan;
28module_param(i2c_scan, int, 0444);
29MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time");
30
31static unsigned int i2c_udelay = 5;
32module_param(i2c_udelay, int, 0644);
33MODULE_PARM_DESC(i2c_udelay,
34 "i2c delay at insmod time, in usecs (should be 5 or higher). Lower value means higher bus speed.");
35
36#define dprintk(level, fmt, arg...) do { \
37 if (i2c_debug >= level) \
38 printk(KERN_DEBUG pr_fmt("%s: i2c:" fmt), \
39 __func__, ##arg); \
40} while (0)
41
42/* ----------------------------------------------------------------------- */
43
44static void cx8800_bit_setscl(void *data, int state)
45{
46 struct cx88_core *core = data;
47
48 if (state)
49 core->i2c_state |= 0x02;
50 else
51 core->i2c_state &= ~0x02;
52 cx_write(MO_I2C, core->i2c_state);
53 cx_read(MO_I2C);
54}
55
56static void cx8800_bit_setsda(void *data, int state)
57{
58 struct cx88_core *core = data;
59
60 if (state)
61 core->i2c_state |= 0x01;
62 else
63 core->i2c_state &= ~0x01;
64 cx_write(MO_I2C, core->i2c_state);
65 cx_read(MO_I2C);
66}
67
68static int cx8800_bit_getscl(void *data)
69{
70 struct cx88_core *core = data;
71 u32 state;
72
73 state = cx_read(MO_I2C);
74 return state & 0x02 ? 1 : 0;
75}
76
77static int cx8800_bit_getsda(void *data)
78{
79 struct cx88_core *core = data;
80 u32 state;
81
82 state = cx_read(MO_I2C);
83 return state & 0x01;
84}
85
86/* ----------------------------------------------------------------------- */
87
88static const struct i2c_algo_bit_data cx8800_i2c_algo_template = {
89 .setsda = cx8800_bit_setsda,
90 .setscl = cx8800_bit_setscl,
91 .getsda = cx8800_bit_getsda,
92 .getscl = cx8800_bit_getscl,
93 .udelay = 16,
94 .timeout = 200,
95};
96
97/* ----------------------------------------------------------------------- */
98
99static const char * const i2c_devs[128] = {
100 [0x1c >> 1] = "lgdt330x",
101 [0x86 >> 1] = "tda9887/cx22702",
102 [0xa0 >> 1] = "eeprom",
103 [0xc0 >> 1] = "tuner (analog)",
104 [0xc2 >> 1] = "tuner (analog/dvb)",
105 [0xc8 >> 1] = "xc5000",
106};
107
108static void do_i2c_scan(const char *name, struct i2c_client *c)
109{
110 unsigned char buf;
111 int i, rc;
112
113 for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) {
114 c->addr = i;
115 rc = i2c_master_recv(c, &buf, 0);
116 if (rc < 0)
117 continue;
118 pr_info("i2c scan: found device @ 0x%x [%s]\n",
119 i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
120 }
121}
122
123/* init + register i2c adapter */
124int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci)
125{
126 /* Prevents usage of invalid delay values */
127 if (i2c_udelay < 5)
128 i2c_udelay = 5;
129
130 core->i2c_algo = cx8800_i2c_algo_template;
131
132 core->i2c_adap.dev.parent = &pci->dev;
133 strscpy(core->i2c_adap.name, core->name, sizeof(core->i2c_adap.name));
134 core->i2c_adap.owner = THIS_MODULE;
135 core->i2c_algo.udelay = i2c_udelay;
136 core->i2c_algo.data = core;
137 i2c_set_adapdata(&core->i2c_adap, &core->v4l2_dev);
138 core->i2c_adap.algo_data = &core->i2c_algo;
139 core->i2c_client.adapter = &core->i2c_adap;
140 strscpy(core->i2c_client.name, "cx88xx internal", I2C_NAME_SIZE);
141
142 cx8800_bit_setscl(core, 1);
143 cx8800_bit_setsda(core, 1);
144
145 core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap);
146 if (core->i2c_rc == 0) {
147 static u8 tuner_data[] = {
148 0x0b, 0xdc, 0x86, 0x52 };
149 static struct i2c_msg tuner_msg = {
150 .flags = 0,
151 .addr = 0xc2 >> 1,
152 .buf = tuner_data,
153 .len = 4
154 };
155
156 dprintk(1, "i2c register ok\n");
157 switch (core->boardnr) {
158 case CX88_BOARD_HAUPPAUGE_HVR1300:
159 case CX88_BOARD_HAUPPAUGE_HVR3000:
160 case CX88_BOARD_HAUPPAUGE_HVR4000:
161 pr_info("i2c init: enabling analog demod on HVR1300/3000/4000 tuner\n");
162 i2c_transfer(core->i2c_client.adapter, &tuner_msg, 1);
163 break;
164 default:
165 break;
166 }
167 if (i2c_scan)
168 do_i2c_scan(core->name, &core->i2c_client);
169 } else
170 pr_err("i2c register FAILED\n");
171
172 return core->i2c_rc;
173}
1
2/*
3 *
4 * cx88-i2c.c -- all the i2c code is here
5 *
6 * Copyright (C) 1996,97,98 Ralph Metzler (rjkm@thp.uni-koeln.de)
7 * & Marcus Metzler (mocm@thp.uni-koeln.de)
8 * (c) 2002 Yurij Sysoev <yurij@naturesoft.net>
9 * (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>
10 *
11 * (c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
12 * - Multituner support and i2c address binding
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 */
24
25#include "cx88.h"
26
27#include <linux/init.h>
28#include <linux/io.h>
29#include <linux/module.h>
30
31#include <media/v4l2-common.h>
32
33static unsigned int i2c_debug;
34module_param(i2c_debug, int, 0644);
35MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
36
37static unsigned int i2c_scan;
38module_param(i2c_scan, int, 0444);
39MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time");
40
41static unsigned int i2c_udelay = 5;
42module_param(i2c_udelay, int, 0644);
43MODULE_PARM_DESC(i2c_udelay,
44 "i2c delay at insmod time, in usecs (should be 5 or higher). Lower value means higher bus speed.");
45
46#define dprintk(level, fmt, arg...) do { \
47 if (i2c_debug >= level) \
48 printk(KERN_DEBUG pr_fmt("%s: i2c:" fmt), \
49 __func__, ##arg); \
50} while (0)
51
52/* ----------------------------------------------------------------------- */
53
54static void cx8800_bit_setscl(void *data, int state)
55{
56 struct cx88_core *core = data;
57
58 if (state)
59 core->i2c_state |= 0x02;
60 else
61 core->i2c_state &= ~0x02;
62 cx_write(MO_I2C, core->i2c_state);
63 cx_read(MO_I2C);
64}
65
66static void cx8800_bit_setsda(void *data, int state)
67{
68 struct cx88_core *core = data;
69
70 if (state)
71 core->i2c_state |= 0x01;
72 else
73 core->i2c_state &= ~0x01;
74 cx_write(MO_I2C, core->i2c_state);
75 cx_read(MO_I2C);
76}
77
78static int cx8800_bit_getscl(void *data)
79{
80 struct cx88_core *core = data;
81 u32 state;
82
83 state = cx_read(MO_I2C);
84 return state & 0x02 ? 1 : 0;
85}
86
87static int cx8800_bit_getsda(void *data)
88{
89 struct cx88_core *core = data;
90 u32 state;
91
92 state = cx_read(MO_I2C);
93 return state & 0x01;
94}
95
96/* ----------------------------------------------------------------------- */
97
98static const struct i2c_algo_bit_data cx8800_i2c_algo_template = {
99 .setsda = cx8800_bit_setsda,
100 .setscl = cx8800_bit_setscl,
101 .getsda = cx8800_bit_getsda,
102 .getscl = cx8800_bit_getscl,
103 .udelay = 16,
104 .timeout = 200,
105};
106
107/* ----------------------------------------------------------------------- */
108
109static const char * const i2c_devs[128] = {
110 [0x1c >> 1] = "lgdt330x",
111 [0x86 >> 1] = "tda9887/cx22702",
112 [0xa0 >> 1] = "eeprom",
113 [0xc0 >> 1] = "tuner (analog)",
114 [0xc2 >> 1] = "tuner (analog/dvb)",
115 [0xc8 >> 1] = "xc5000",
116};
117
118static void do_i2c_scan(const char *name, struct i2c_client *c)
119{
120 unsigned char buf;
121 int i, rc;
122
123 for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) {
124 c->addr = i;
125 rc = i2c_master_recv(c, &buf, 0);
126 if (rc < 0)
127 continue;
128 pr_info("i2c scan: found device @ 0x%x [%s]\n",
129 i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
130 }
131}
132
133/* init + register i2c adapter */
134int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci)
135{
136 /* Prevents usage of invalid delay values */
137 if (i2c_udelay < 5)
138 i2c_udelay = 5;
139
140 core->i2c_algo = cx8800_i2c_algo_template;
141
142 core->i2c_adap.dev.parent = &pci->dev;
143 strlcpy(core->i2c_adap.name, core->name, sizeof(core->i2c_adap.name));
144 core->i2c_adap.owner = THIS_MODULE;
145 core->i2c_algo.udelay = i2c_udelay;
146 core->i2c_algo.data = core;
147 i2c_set_adapdata(&core->i2c_adap, &core->v4l2_dev);
148 core->i2c_adap.algo_data = &core->i2c_algo;
149 core->i2c_client.adapter = &core->i2c_adap;
150 strlcpy(core->i2c_client.name, "cx88xx internal", I2C_NAME_SIZE);
151
152 cx8800_bit_setscl(core, 1);
153 cx8800_bit_setsda(core, 1);
154
155 core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap);
156 if (core->i2c_rc == 0) {
157 static u8 tuner_data[] = {
158 0x0b, 0xdc, 0x86, 0x52 };
159 static struct i2c_msg tuner_msg = {
160 .flags = 0,
161 .addr = 0xc2 >> 1,
162 .buf = tuner_data,
163 .len = 4
164 };
165
166 dprintk(1, "i2c register ok\n");
167 switch (core->boardnr) {
168 case CX88_BOARD_HAUPPAUGE_HVR1300:
169 case CX88_BOARD_HAUPPAUGE_HVR3000:
170 case CX88_BOARD_HAUPPAUGE_HVR4000:
171 pr_info("i2c init: enabling analog demod on HVR1300/3000/4000 tuner\n");
172 i2c_transfer(core->i2c_client.adapter, &tuner_msg, 1);
173 break;
174 default:
175 break;
176 }
177 if (i2c_scan)
178 do_i2c_scan(core->name, &core->i2c_client);
179 } else
180 pr_err("i2c register FAILED\n");
181
182 return core->i2c_rc;
183}