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Commit | Line | Data |
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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
53c4e955 | 2 | |
1da177e4 | 3 | /* |
7b61ba8f MCC |
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 | * | |
32590819 | 12 | * (c) 2005 Mauro Carvalho Chehab <mchehab@kernel.org> |
7b61ba8f | 13 | * - Multituner support and i2c address binding |
7b61ba8f | 14 | */ |
1da177e4 | 15 | |
65bc2fe8 MCC |
16 | #include "cx88.h" |
17 | ||
1da177e4 | 18 | #include <linux/init.h> |
399426ca MCC |
19 | #include <linux/io.h> |
20 | #include <linux/module.h> | |
1da177e4 | 21 | |
5e453dc7 | 22 | #include <media/v4l2-common.h> |
1da177e4 | 23 | |
ff699e6b | 24 | static unsigned int i2c_debug; |
1da177e4 | 25 | module_param(i2c_debug, int, 0644); |
7b61ba8f | 26 | MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]"); |
1da177e4 | 27 | |
ff699e6b | 28 | static unsigned int i2c_scan; |
1da177e4 | 29 | module_param(i2c_scan, int, 0444); |
7b61ba8f | 30 | MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time"); |
1da177e4 | 31 | |
141276b5 MCC |
32 | static unsigned int i2c_udelay = 5; |
33 | module_param(i2c_udelay, int, 0644); | |
399426ca MCC |
34 | MODULE_PARM_DESC(i2c_udelay, |
35 | "i2c delay at insmod time, in usecs (should be 5 or higher). Lower value means higher bus speed."); | |
141276b5 | 36 | |
65bc2fe8 MCC |
37 | #define dprintk(level, fmt, arg...) do { \ |
38 | if (i2c_debug >= level) \ | |
39 | printk(KERN_DEBUG pr_fmt("%s: i2c:" fmt), \ | |
40 | __func__, ##arg); \ | |
41 | } while (0) | |
1da177e4 LT |
42 | |
43 | /* ----------------------------------------------------------------------- */ | |
44 | ||
408b664a | 45 | static void cx8800_bit_setscl(void *data, int state) |
1da177e4 LT |
46 | { |
47 | struct cx88_core *core = data; | |
48 | ||
49 | if (state) | |
50 | core->i2c_state |= 0x02; | |
51 | else | |
52 | core->i2c_state &= ~0x02; | |
53 | cx_write(MO_I2C, core->i2c_state); | |
54 | cx_read(MO_I2C); | |
55 | } | |
56 | ||
408b664a | 57 | static void cx8800_bit_setsda(void *data, int state) |
1da177e4 LT |
58 | { |
59 | struct cx88_core *core = data; | |
60 | ||
61 | if (state) | |
62 | core->i2c_state |= 0x01; | |
63 | else | |
64 | core->i2c_state &= ~0x01; | |
65 | cx_write(MO_I2C, core->i2c_state); | |
66 | cx_read(MO_I2C); | |
67 | } | |
68 | ||
69 | static int cx8800_bit_getscl(void *data) | |
70 | { | |
71 | struct cx88_core *core = data; | |
72 | u32 state; | |
73 | ||
74 | state = cx_read(MO_I2C); | |
75 | return state & 0x02 ? 1 : 0; | |
76 | } | |
77 | ||
78 | static int cx8800_bit_getsda(void *data) | |
79 | { | |
80 | struct cx88_core *core = data; | |
81 | u32 state; | |
82 | ||
83 | state = cx_read(MO_I2C); | |
84 | return state & 0x01; | |
85 | } | |
86 | ||
87 | /* ----------------------------------------------------------------------- */ | |
88 | ||
7e520d09 | 89 | static const struct i2c_algo_bit_data cx8800_i2c_algo_template = { |
1da177e4 LT |
90 | .setsda = cx8800_bit_setsda, |
91 | .setscl = cx8800_bit_setscl, | |
92 | .getsda = cx8800_bit_getsda, | |
93 | .getscl = cx8800_bit_getscl, | |
94 | .udelay = 16, | |
1da177e4 LT |
95 | .timeout = 200, |
96 | }; | |
97 | ||
98 | /* ----------------------------------------------------------------------- */ | |
99 | ||
2e4e98e7 | 100 | static const char * const i2c_devs[128] = { |
7b61ba8f MCC |
101 | [0x1c >> 1] = "lgdt330x", |
102 | [0x86 >> 1] = "tda9887/cx22702", | |
103 | [0xa0 >> 1] = "eeprom", | |
104 | [0xc0 >> 1] = "tuner (analog)", | |
105 | [0xc2 >> 1] = "tuner (analog/dvb)", | |
106 | [0xc8 >> 1] = "xc5000", | |
1da177e4 LT |
107 | }; |
108 | ||
2e4e98e7 | 109 | static void do_i2c_scan(const char *name, struct i2c_client *c) |
1da177e4 LT |
110 | { |
111 | unsigned char buf; | |
7b61ba8f | 112 | int i, rc; |
1da177e4 | 113 | |
53c4e955 | 114 | for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) { |
1da177e4 | 115 | c->addr = i; |
7b61ba8f | 116 | rc = i2c_master_recv(c, &buf, 0); |
1da177e4 LT |
117 | if (rc < 0) |
118 | continue; | |
65bc2fe8 MCC |
119 | pr_info("i2c scan: found device @ 0x%x [%s]\n", |
120 | i << 1, i2c_devs[i] ? i2c_devs[i] : "???"); | |
1da177e4 LT |
121 | } |
122 | } | |
123 | ||
a824f0f4 | 124 | /* init + register i2c adapter */ |
1da177e4 LT |
125 | int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci) |
126 | { | |
141276b5 | 127 | /* Prevents usage of invalid delay values */ |
7b61ba8f MCC |
128 | if (i2c_udelay < 5) |
129 | i2c_udelay = 5; | |
141276b5 | 130 | |
b5237747 | 131 | core->i2c_algo = cx8800_i2c_algo_template; |
1da177e4 | 132 | |
1da177e4 | 133 | core->i2c_adap.dev.parent = &pci->dev; |
c0decac1 | 134 | strscpy(core->i2c_adap.name, core->name, sizeof(core->i2c_adap.name)); |
7e520d09 | 135 | core->i2c_adap.owner = THIS_MODULE; |
7e520d09 | 136 | core->i2c_algo.udelay = i2c_udelay; |
4ac97914 | 137 | core->i2c_algo.data = core; |
9467fe12 | 138 | i2c_set_adapdata(&core->i2c_adap, &core->v4l2_dev); |
4ac97914 MCC |
139 | core->i2c_adap.algo_data = &core->i2c_algo; |
140 | core->i2c_client.adapter = &core->i2c_adap; | |
c0decac1 | 141 | strscpy(core->i2c_client.name, "cx88xx internal", I2C_NAME_SIZE); |
1da177e4 | 142 | |
7b61ba8f MCC |
143 | cx8800_bit_setscl(core, 1); |
144 | cx8800_bit_setsda(core, 1); | |
1da177e4 LT |
145 | |
146 | core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap); | |
7b61ba8f MCC |
147 | if (core->i2c_rc == 0) { |
148 | static u8 tuner_data[] = { | |
149 | 0x0b, 0xdc, 0x86, 0x52 }; | |
150 | static struct i2c_msg tuner_msg = { | |
151 | .flags = 0, | |
152 | .addr = 0xc2 >> 1, | |
153 | .buf = tuner_data, | |
154 | .len = 4 | |
155 | }; | |
1cbd89db | 156 | |
1da177e4 | 157 | dprintk(1, "i2c register ok\n"); |
7b61ba8f | 158 | switch (core->boardnr) { |
399426ca MCC |
159 | case CX88_BOARD_HAUPPAUGE_HVR1300: |
160 | case CX88_BOARD_HAUPPAUGE_HVR3000: | |
161 | case CX88_BOARD_HAUPPAUGE_HVR4000: | |
162 | pr_info("i2c init: enabling analog demod on HVR1300/3000/4000 tuner\n"); | |
163 | i2c_transfer(core->i2c_client.adapter, &tuner_msg, 1); | |
164 | break; | |
165 | default: | |
166 | break; | |
1cbd89db | 167 | } |
1da177e4 | 168 | if (i2c_scan) |
7b61ba8f | 169 | do_i2c_scan(core->name, &core->i2c_client); |
1da177e4 | 170 | } else |
65bc2fe8 | 171 | pr_err("i2c register FAILED\n"); |
c668f32d | 172 | |
15ceb6b1 JD |
173 | return core->i2c_rc; |
174 | } |