1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * cs53l32a (Adaptec AVC-2010 and AVC-2410) i2c ivtv driver. 4 * Copyright (C) 2005 Martin Vaughan 5 * 6 * Audio source switching for Adaptec AVC-2410 added by Trev Jackson 7 */ 8 9 10 #include <linux/module.h> 11 #include <linux/types.h> 12 #include <linux/slab.h> 13 #include <linux/ioctl.h> 14 #include <linux/uaccess.h> 15 #include <linux/i2c.h> 16 #include <linux/videodev2.h> 17 #include <media/v4l2-device.h> 18 #include <media/v4l2-ctrls.h> 19 20 MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC"); 21 MODULE_AUTHOR("Martin Vaughan"); 22 MODULE_LICENSE("GPL"); 23 24 static bool debug; 25 26 module_param(debug, bool, 0644); 27 28 MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On"); 29 30 31 struct cs53l32a_state { 32 struct v4l2_subdev sd; 33 struct v4l2_ctrl_handler hdl; 34 }; 35 36 static inline struct cs53l32a_state *to_state(struct v4l2_subdev *sd) 37 { 38 return container_of(sd, struct cs53l32a_state, sd); 39 } 40 41 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) 42 { 43 return &container_of(ctrl->handler, struct cs53l32a_state, hdl)->sd; 44 } 45 46 /* ----------------------------------------------------------------------- */ 47 48 static int cs53l32a_write(struct v4l2_subdev *sd, u8 reg, u8 value) 49 { 50 struct i2c_client *client = v4l2_get_subdevdata(sd); 51 52 return i2c_smbus_write_byte_data(client, reg, value); 53 } 54 55 static int cs53l32a_read(struct v4l2_subdev *sd, u8 reg) 56 { 57 struct i2c_client *client = v4l2_get_subdevdata(sd); 58 59 return i2c_smbus_read_byte_data(client, reg); 60 } 61 62 static int cs53l32a_s_routing(struct v4l2_subdev *sd, 63 u32 input, u32 output, u32 config) 64 { 65 /* There are 2 physical inputs, but the second input can be 66 placed in two modes, the first mode bypasses the PGA (gain), 67 the second goes through the PGA. Hence there are three 68 possible inputs to choose from. */ 69 if (input > 2) { 70 v4l2_err(sd, "Invalid input %d.\n", input); 71 return -EINVAL; 72 } 73 cs53l32a_write(sd, 0x01, 0x01 + (input << 4)); 74 return 0; 75 } 76 77 static int cs53l32a_s_ctrl(struct v4l2_ctrl *ctrl) 78 { 79 struct v4l2_subdev *sd = to_sd(ctrl); 80 81 switch (ctrl->id) { 82 case V4L2_CID_AUDIO_MUTE: 83 cs53l32a_write(sd, 0x03, ctrl->val ? 0xf0 : 0x30); 84 return 0; 85 case V4L2_CID_AUDIO_VOLUME: 86 cs53l32a_write(sd, 0x04, (u8)ctrl->val); 87 cs53l32a_write(sd, 0x05, (u8)ctrl->val); 88 return 0; 89 } 90 return -EINVAL; 91 } 92 93 static int cs53l32a_log_status(struct v4l2_subdev *sd) 94 { 95 struct cs53l32a_state *state = to_state(sd); 96 u8 v = cs53l32a_read(sd, 0x01); 97 98 v4l2_info(sd, "Input: %d\n", (v >> 4) & 3); 99 v4l2_ctrl_handler_log_status(&state->hdl, sd->name); 100 return 0; 101 } 102 103 /* ----------------------------------------------------------------------- */ 104 105 static const struct v4l2_ctrl_ops cs53l32a_ctrl_ops = { 106 .s_ctrl = cs53l32a_s_ctrl, 107 }; 108 109 static const struct v4l2_subdev_core_ops cs53l32a_core_ops = { 110 .log_status = cs53l32a_log_status, 111 }; 112 113 static const struct v4l2_subdev_audio_ops cs53l32a_audio_ops = { 114 .s_routing = cs53l32a_s_routing, 115 }; 116 117 static const struct v4l2_subdev_ops cs53l32a_ops = { 118 .core = &cs53l32a_core_ops, 119 .audio = &cs53l32a_audio_ops, 120 }; 121 122 /* ----------------------------------------------------------------------- */ 123 124 /* i2c implementation */ 125 126 /* 127 * Generic i2c probe 128 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' 129 */ 130 131 static int cs53l32a_probe(struct i2c_client *client, 132 const struct i2c_device_id *id) 133 { 134 struct cs53l32a_state *state; 135 struct v4l2_subdev *sd; 136 int i; 137 138 /* Check if the adapter supports the needed features */ 139 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 140 return -EIO; 141 142 if (!id) 143 strscpy(client->name, "cs53l32a", sizeof(client->name)); 144 145 v4l_info(client, "chip found @ 0x%x (%s)\n", 146 client->addr << 1, client->adapter->name); 147 148 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); 149 if (state == NULL) 150 return -ENOMEM; 151 sd = &state->sd; 152 v4l2_i2c_subdev_init(sd, client, &cs53l32a_ops); 153 154 for (i = 1; i <= 7; i++) { 155 u8 v = cs53l32a_read(sd, i); 156 157 v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v); 158 } 159 160 v4l2_ctrl_handler_init(&state->hdl, 2); 161 v4l2_ctrl_new_std(&state->hdl, &cs53l32a_ctrl_ops, 162 V4L2_CID_AUDIO_VOLUME, -96, 12, 1, 0); 163 v4l2_ctrl_new_std(&state->hdl, &cs53l32a_ctrl_ops, 164 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); 165 sd->ctrl_handler = &state->hdl; 166 if (state->hdl.error) { 167 int err = state->hdl.error; 168 169 v4l2_ctrl_handler_free(&state->hdl); 170 return err; 171 } 172 173 /* Set cs53l32a internal register for Adaptec 2010/2410 setup */ 174 175 cs53l32a_write(sd, 0x01, 0x21); 176 cs53l32a_write(sd, 0x02, 0x29); 177 cs53l32a_write(sd, 0x03, 0x30); 178 cs53l32a_write(sd, 0x04, 0x00); 179 cs53l32a_write(sd, 0x05, 0x00); 180 cs53l32a_write(sd, 0x06, 0x00); 181 cs53l32a_write(sd, 0x07, 0x00); 182 183 /* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */ 184 185 for (i = 1; i <= 7; i++) { 186 u8 v = cs53l32a_read(sd, i); 187 188 v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v); 189 } 190 return 0; 191 } 192 193 static void cs53l32a_remove(struct i2c_client *client) 194 { 195 struct v4l2_subdev *sd = i2c_get_clientdata(client); 196 struct cs53l32a_state *state = to_state(sd); 197 198 v4l2_device_unregister_subdev(sd); 199 v4l2_ctrl_handler_free(&state->hdl); 200 } 201 202 static const struct i2c_device_id cs53l32a_id[] = { 203 { "cs53l32a", 0 }, 204 { } 205 }; 206 MODULE_DEVICE_TABLE(i2c, cs53l32a_id); 207 208 static struct i2c_driver cs53l32a_driver = { 209 .driver = { 210 .name = "cs53l32a", 211 }, 212 .probe = cs53l32a_probe, 213 .remove = cs53l32a_remove, 214 .id_table = cs53l32a_id, 215 }; 216 217 module_i2c_driver(cs53l32a_driver); 218