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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 | // SPDX-License-Identifier: GPL-2.0-or-later /* * tlv320aic23b - driver version 0.0.1 * * Copyright (C) 2006 Scott Alfter <salfter@ssai.us> * * Based on wm8775 driver * * Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to> * Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl> */ #include <linux/module.h> #include <linux/types.h> #include <linux/slab.h> #include <linux/ioctl.h> #include <linux/uaccess.h> #include <linux/i2c.h> #include <linux/videodev2.h> #include <media/v4l2-device.h> #include <media/v4l2-ctrls.h> MODULE_DESCRIPTION("tlv320aic23b driver"); MODULE_AUTHOR("Scott Alfter, Ulf Eklund, Hans Verkuil"); MODULE_LICENSE("GPL"); /* ----------------------------------------------------------------------- */ struct tlv320aic23b_state { struct v4l2_subdev sd; struct v4l2_ctrl_handler hdl; }; static inline struct tlv320aic23b_state *to_state(struct v4l2_subdev *sd) { return container_of(sd, struct tlv320aic23b_state, sd); } static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) { return &container_of(ctrl->handler, struct tlv320aic23b_state, hdl)->sd; } static int tlv320aic23b_write(struct v4l2_subdev *sd, int reg, u16 val) { struct i2c_client *client = v4l2_get_subdevdata(sd); int i; if ((reg < 0 || reg > 9) && (reg != 15)) { v4l2_err(sd, "Invalid register R%d\n", reg); return -1; } for (i = 0; i < 3; i++) if (i2c_smbus_write_byte_data(client, (reg << 1) | (val >> 8), val & 0xff) == 0) return 0; v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg); return -1; } static int tlv320aic23b_s_clock_freq(struct v4l2_subdev *sd, u32 freq) { switch (freq) { case 32000: /* set sample rate to 32 kHz */ tlv320aic23b_write(sd, 8, 0x018); break; case 44100: /* set sample rate to 44.1 kHz */ tlv320aic23b_write(sd, 8, 0x022); break; case 48000: /* set sample rate to 48 kHz */ tlv320aic23b_write(sd, 8, 0x000); break; default: return -EINVAL; } return 0; } static int tlv320aic23b_s_ctrl(struct v4l2_ctrl *ctrl) { struct v4l2_subdev *sd = to_sd(ctrl); switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: tlv320aic23b_write(sd, 0, 0x180); /* mute both channels */ /* set gain on both channels to +3.0 dB */ if (!ctrl->val) tlv320aic23b_write(sd, 0, 0x119); return 0; } return -EINVAL; } static int tlv320aic23b_log_status(struct v4l2_subdev *sd) { struct tlv320aic23b_state *state = to_state(sd); v4l2_ctrl_handler_log_status(&state->hdl, sd->name); return 0; } /* ----------------------------------------------------------------------- */ static const struct v4l2_ctrl_ops tlv320aic23b_ctrl_ops = { .s_ctrl = tlv320aic23b_s_ctrl, }; static const struct v4l2_subdev_core_ops tlv320aic23b_core_ops = { .log_status = tlv320aic23b_log_status, }; static const struct v4l2_subdev_audio_ops tlv320aic23b_audio_ops = { .s_clock_freq = tlv320aic23b_s_clock_freq, }; static const struct v4l2_subdev_ops tlv320aic23b_ops = { .core = &tlv320aic23b_core_ops, .audio = &tlv320aic23b_audio_ops, }; /* ----------------------------------------------------------------------- */ /* i2c implementation */ /* * Generic i2c probe * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' */ static int tlv320aic23b_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct tlv320aic23b_state *state; struct v4l2_subdev *sd; /* Check if the adapter supports the needed features */ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -EIO; v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name); state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); if (state == NULL) return -ENOMEM; sd = &state->sd; v4l2_i2c_subdev_init(sd, client, &tlv320aic23b_ops); /* Initialize tlv320aic23b */ /* RESET */ tlv320aic23b_write(sd, 15, 0x000); /* turn off DAC & mic input */ tlv320aic23b_write(sd, 6, 0x00A); /* left-justified, 24-bit, master mode */ tlv320aic23b_write(sd, 7, 0x049); /* set gain on both channels to +3.0 dB */ tlv320aic23b_write(sd, 0, 0x119); /* set sample rate to 48 kHz */ tlv320aic23b_write(sd, 8, 0x000); /* activate digital interface */ tlv320aic23b_write(sd, 9, 0x001); v4l2_ctrl_handler_init(&state->hdl, 1); v4l2_ctrl_new_std(&state->hdl, &tlv320aic23b_ctrl_ops, V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); sd->ctrl_handler = &state->hdl; if (state->hdl.error) { int err = state->hdl.error; v4l2_ctrl_handler_free(&state->hdl); return err; } v4l2_ctrl_handler_setup(&state->hdl); return 0; } static void tlv320aic23b_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct tlv320aic23b_state *state = to_state(sd); v4l2_device_unregister_subdev(sd); v4l2_ctrl_handler_free(&state->hdl); } /* ----------------------------------------------------------------------- */ static const struct i2c_device_id tlv320aic23b_id[] = { { "tlv320aic23b", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, tlv320aic23b_id); static struct i2c_driver tlv320aic23b_driver = { .driver = { .name = "tlv320aic23b", }, .probe = tlv320aic23b_probe, .remove = tlv320aic23b_remove, .id_table = tlv320aic23b_id, }; module_i2c_driver(tlv320aic23b_driver); |