Commit | Line | Data |
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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
761dacd2 HV |
2 | /* |
3 | * m52790 i2c ivtv driver. | |
4 | * Copyright (C) 2007 Hans Verkuil | |
5 | * | |
6 | * A/V source switching Mitsubishi M52790SP/FP | |
761dacd2 HV |
7 | */ |
8 | ||
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/types.h> | |
5a0e3ad6 | 12 | #include <linux/slab.h> |
761dacd2 | 13 | #include <linux/ioctl.h> |
7c0f6ba6 | 14 | #include <linux/uaccess.h> |
761dacd2 | 15 | #include <linux/i2c.h> |
33b687cf | 16 | #include <linux/videodev2.h> |
b5dcee22 | 17 | #include <media/i2c/m52790.h> |
5d302f2e | 18 | #include <media/v4l2-device.h> |
761dacd2 HV |
19 | |
20 | MODULE_DESCRIPTION("i2c device driver for m52790 A/V switch"); | |
21 | MODULE_AUTHOR("Hans Verkuil"); | |
22 | MODULE_LICENSE("GPL"); | |
23 | ||
761dacd2 HV |
24 | |
25 | struct m52790_state { | |
5d302f2e | 26 | struct v4l2_subdev sd; |
761dacd2 HV |
27 | u16 input; |
28 | u16 output; | |
29 | }; | |
30 | ||
5d302f2e HV |
31 | static inline struct m52790_state *to_state(struct v4l2_subdev *sd) |
32 | { | |
33 | return container_of(sd, struct m52790_state, sd); | |
34 | } | |
35 | ||
761dacd2 HV |
36 | /* ----------------------------------------------------------------------- */ |
37 | ||
5d302f2e | 38 | static int m52790_write(struct v4l2_subdev *sd) |
761dacd2 | 39 | { |
5d302f2e HV |
40 | struct m52790_state *state = to_state(sd); |
41 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
42 | ||
761dacd2 HV |
43 | u8 sw1 = (state->input | state->output) & 0xff; |
44 | u8 sw2 = (state->input | state->output) >> 8; | |
45 | ||
46 | return i2c_smbus_write_byte_data(client, sw1, sw2); | |
47 | } | |
48 | ||
5d302f2e HV |
49 | /* Note: audio and video are linked and cannot be switched separately. |
50 | So audio and video routing commands are identical for this chip. | |
51 | In theory the video amplifier and audio modes could be handled | |
52 | separately for the output, but that seems to be overkill right now. | |
53 | The same holds for implementing an audio mute control, this is now | |
54 | part of the audio output routing. The normal case is that another | |
55 | chip takes care of the actual muting so making it part of the | |
56 | output routing seems to be the right thing to do for now. */ | |
5325b427 HV |
57 | static int m52790_s_routing(struct v4l2_subdev *sd, |
58 | u32 input, u32 output, u32 config) | |
761dacd2 | 59 | { |
5d302f2e HV |
60 | struct m52790_state *state = to_state(sd); |
61 | ||
5325b427 HV |
62 | state->input = input; |
63 | state->output = output; | |
5d302f2e HV |
64 | m52790_write(sd); |
65 | return 0; | |
66 | } | |
761dacd2 HV |
67 | |
68 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
aecde8b5 | 69 | static int m52790_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) |
5d302f2e HV |
70 | { |
71 | struct m52790_state *state = to_state(sd); | |
761dacd2 | 72 | |
5d302f2e HV |
73 | if (reg->reg != 0) |
74 | return -EINVAL; | |
aecde8b5 | 75 | reg->size = 1; |
5d302f2e HV |
76 | reg->val = state->input | state->output; |
77 | return 0; | |
78 | } | |
761dacd2 | 79 | |
977ba3b1 | 80 | static int m52790_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg) |
5d302f2e HV |
81 | { |
82 | struct m52790_state *state = to_state(sd); | |
761dacd2 | 83 | |
5d302f2e HV |
84 | if (reg->reg != 0) |
85 | return -EINVAL; | |
86 | state->input = reg->val & 0x0303; | |
87 | state->output = reg->val & ~0x0303; | |
88 | m52790_write(sd); | |
761dacd2 HV |
89 | return 0; |
90 | } | |
5d302f2e HV |
91 | #endif |
92 | ||
5d302f2e HV |
93 | static int m52790_log_status(struct v4l2_subdev *sd) |
94 | { | |
95 | struct m52790_state *state = to_state(sd); | |
96 | ||
97 | v4l2_info(sd, "Switch 1: %02x\n", | |
98 | (state->input | state->output) & 0xff); | |
99 | v4l2_info(sd, "Switch 2: %02x\n", | |
100 | (state->input | state->output) >> 8); | |
101 | return 0; | |
102 | } | |
103 | ||
5d302f2e HV |
104 | /* ----------------------------------------------------------------------- */ |
105 | ||
106 | static const struct v4l2_subdev_core_ops m52790_core_ops = { | |
107 | .log_status = m52790_log_status, | |
5d302f2e HV |
108 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
109 | .g_register = m52790_g_register, | |
110 | .s_register = m52790_s_register, | |
111 | #endif | |
112 | }; | |
113 | ||
114 | static const struct v4l2_subdev_audio_ops m52790_audio_ops = { | |
115 | .s_routing = m52790_s_routing, | |
116 | }; | |
117 | ||
118 | static const struct v4l2_subdev_video_ops m52790_video_ops = { | |
119 | .s_routing = m52790_s_routing, | |
120 | }; | |
121 | ||
122 | static const struct v4l2_subdev_ops m52790_ops = { | |
123 | .core = &m52790_core_ops, | |
124 | .audio = &m52790_audio_ops, | |
125 | .video = &m52790_video_ops, | |
126 | }; | |
761dacd2 HV |
127 | |
128 | /* ----------------------------------------------------------------------- */ | |
129 | ||
130 | /* i2c implementation */ | |
131 | ||
270d9afa | 132 | static int m52790_probe(struct i2c_client *client) |
761dacd2 HV |
133 | { |
134 | struct m52790_state *state; | |
5d302f2e | 135 | struct v4l2_subdev *sd; |
761dacd2 HV |
136 | |
137 | /* Check if the adapter supports the needed features */ | |
138 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
139 | return -EIO; | |
140 | ||
761dacd2 HV |
141 | v4l_info(client, "chip found @ 0x%x (%s)\n", |
142 | client->addr << 1, client->adapter->name); | |
143 | ||
c02b211d | 144 | state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); |
761dacd2 HV |
145 | if (state == NULL) |
146 | return -ENOMEM; | |
147 | ||
5d302f2e HV |
148 | sd = &state->sd; |
149 | v4l2_i2c_subdev_init(sd, client, &m52790_ops); | |
761dacd2 HV |
150 | state->input = M52790_IN_TUNER; |
151 | state->output = M52790_OUT_STEREO; | |
5d302f2e | 152 | m52790_write(sd); |
761dacd2 HV |
153 | return 0; |
154 | } | |
155 | ||
ed5c2f5f | 156 | static void m52790_remove(struct i2c_client *client) |
761dacd2 | 157 | { |
5d302f2e HV |
158 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
159 | ||
160 | v4l2_device_unregister_subdev(sd); | |
761dacd2 HV |
161 | } |
162 | ||
163 | /* ----------------------------------------------------------------------- */ | |
164 | ||
af294867 JD |
165 | static const struct i2c_device_id m52790_id[] = { |
166 | { "m52790", 0 }, | |
167 | { } | |
168 | }; | |
169 | MODULE_DEVICE_TABLE(i2c, m52790_id); | |
170 | ||
d30f60b3 HV |
171 | static struct i2c_driver m52790_driver = { |
172 | .driver = { | |
d30f60b3 HV |
173 | .name = "m52790", |
174 | }, | |
270d9afa | 175 | .probe_new = m52790_probe, |
d30f60b3 HV |
176 | .remove = m52790_remove, |
177 | .id_table = m52790_id, | |
761dacd2 | 178 | }; |
d30f60b3 | 179 | |
c6e8d86f | 180 | module_i2c_driver(m52790_driver); |