1c942fddfSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 2cb7a01acSMauro Carvalho Chehab /* 3cb7a01acSMauro Carvalho Chehab * tlv320aic23b - driver version 0.0.1 4cb7a01acSMauro Carvalho Chehab * 5cb7a01acSMauro Carvalho Chehab * Copyright (C) 2006 Scott Alfter <salfter@ssai.us> 6cb7a01acSMauro Carvalho Chehab * 7cb7a01acSMauro Carvalho Chehab * Based on wm8775 driver 8cb7a01acSMauro Carvalho Chehab * 9cb7a01acSMauro Carvalho Chehab * Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to> 10cb7a01acSMauro Carvalho Chehab * Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl> 11cb7a01acSMauro Carvalho Chehab */ 12cb7a01acSMauro Carvalho Chehab 13cb7a01acSMauro Carvalho Chehab #include <linux/module.h> 14cb7a01acSMauro Carvalho Chehab #include <linux/types.h> 15cb7a01acSMauro Carvalho Chehab #include <linux/slab.h> 16cb7a01acSMauro Carvalho Chehab #include <linux/ioctl.h> 177c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 18cb7a01acSMauro Carvalho Chehab #include <linux/i2c.h> 19cb7a01acSMauro Carvalho Chehab #include <linux/videodev2.h> 20cb7a01acSMauro Carvalho Chehab #include <media/v4l2-device.h> 21cb7a01acSMauro Carvalho Chehab #include <media/v4l2-ctrls.h> 22cb7a01acSMauro Carvalho Chehab 23cb7a01acSMauro Carvalho Chehab MODULE_DESCRIPTION("tlv320aic23b driver"); 24cb7a01acSMauro Carvalho Chehab MODULE_AUTHOR("Scott Alfter, Ulf Eklund, Hans Verkuil"); 25cb7a01acSMauro Carvalho Chehab MODULE_LICENSE("GPL"); 26cb7a01acSMauro Carvalho Chehab 27cb7a01acSMauro Carvalho Chehab 28cb7a01acSMauro Carvalho Chehab /* ----------------------------------------------------------------------- */ 29cb7a01acSMauro Carvalho Chehab 30cb7a01acSMauro Carvalho Chehab struct tlv320aic23b_state { 31cb7a01acSMauro Carvalho Chehab struct v4l2_subdev sd; 32cb7a01acSMauro Carvalho Chehab struct v4l2_ctrl_handler hdl; 33cb7a01acSMauro Carvalho Chehab }; 34cb7a01acSMauro Carvalho Chehab 35cb7a01acSMauro Carvalho Chehab static inline struct tlv320aic23b_state *to_state(struct v4l2_subdev *sd) 36cb7a01acSMauro Carvalho Chehab { 37cb7a01acSMauro Carvalho Chehab return container_of(sd, struct tlv320aic23b_state, sd); 38cb7a01acSMauro Carvalho Chehab } 39cb7a01acSMauro Carvalho Chehab 40cb7a01acSMauro Carvalho Chehab static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) 41cb7a01acSMauro Carvalho Chehab { 42cb7a01acSMauro Carvalho Chehab return &container_of(ctrl->handler, struct tlv320aic23b_state, hdl)->sd; 43cb7a01acSMauro Carvalho Chehab } 44cb7a01acSMauro Carvalho Chehab 45cb7a01acSMauro Carvalho Chehab static int tlv320aic23b_write(struct v4l2_subdev *sd, int reg, u16 val) 46cb7a01acSMauro Carvalho Chehab { 47cb7a01acSMauro Carvalho Chehab struct i2c_client *client = v4l2_get_subdevdata(sd); 48cb7a01acSMauro Carvalho Chehab int i; 49cb7a01acSMauro Carvalho Chehab 50cb7a01acSMauro Carvalho Chehab if ((reg < 0 || reg > 9) && (reg != 15)) { 51cb7a01acSMauro Carvalho Chehab v4l2_err(sd, "Invalid register R%d\n", reg); 52cb7a01acSMauro Carvalho Chehab return -1; 53cb7a01acSMauro Carvalho Chehab } 54cb7a01acSMauro Carvalho Chehab 55cb7a01acSMauro Carvalho Chehab for (i = 0; i < 3; i++) 56cb7a01acSMauro Carvalho Chehab if (i2c_smbus_write_byte_data(client, 57cb7a01acSMauro Carvalho Chehab (reg << 1) | (val >> 8), val & 0xff) == 0) 58cb7a01acSMauro Carvalho Chehab return 0; 59cb7a01acSMauro Carvalho Chehab v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg); 60cb7a01acSMauro Carvalho Chehab return -1; 61cb7a01acSMauro Carvalho Chehab } 62cb7a01acSMauro Carvalho Chehab 63cb7a01acSMauro Carvalho Chehab static int tlv320aic23b_s_clock_freq(struct v4l2_subdev *sd, u32 freq) 64cb7a01acSMauro Carvalho Chehab { 65cb7a01acSMauro Carvalho Chehab switch (freq) { 66cb7a01acSMauro Carvalho Chehab case 32000: /* set sample rate to 32 kHz */ 67cb7a01acSMauro Carvalho Chehab tlv320aic23b_write(sd, 8, 0x018); 68cb7a01acSMauro Carvalho Chehab break; 69cb7a01acSMauro Carvalho Chehab case 44100: /* set sample rate to 44.1 kHz */ 70cb7a01acSMauro Carvalho Chehab tlv320aic23b_write(sd, 8, 0x022); 71cb7a01acSMauro Carvalho Chehab break; 72cb7a01acSMauro Carvalho Chehab case 48000: /* set sample rate to 48 kHz */ 73cb7a01acSMauro Carvalho Chehab tlv320aic23b_write(sd, 8, 0x000); 74cb7a01acSMauro Carvalho Chehab break; 75cb7a01acSMauro Carvalho Chehab default: 76cb7a01acSMauro Carvalho Chehab return -EINVAL; 77cb7a01acSMauro Carvalho Chehab } 78cb7a01acSMauro Carvalho Chehab return 0; 79cb7a01acSMauro Carvalho Chehab } 80cb7a01acSMauro Carvalho Chehab 81cb7a01acSMauro Carvalho Chehab static int tlv320aic23b_s_ctrl(struct v4l2_ctrl *ctrl) 82cb7a01acSMauro Carvalho Chehab { 83cb7a01acSMauro Carvalho Chehab struct v4l2_subdev *sd = to_sd(ctrl); 84cb7a01acSMauro Carvalho Chehab 85cb7a01acSMauro Carvalho Chehab switch (ctrl->id) { 86cb7a01acSMauro Carvalho Chehab case V4L2_CID_AUDIO_MUTE: 87cb7a01acSMauro Carvalho Chehab tlv320aic23b_write(sd, 0, 0x180); /* mute both channels */ 88cb7a01acSMauro Carvalho Chehab /* set gain on both channels to +3.0 dB */ 89cb7a01acSMauro Carvalho Chehab if (!ctrl->val) 90cb7a01acSMauro Carvalho Chehab tlv320aic23b_write(sd, 0, 0x119); 91cb7a01acSMauro Carvalho Chehab return 0; 92cb7a01acSMauro Carvalho Chehab } 93cb7a01acSMauro Carvalho Chehab return -EINVAL; 94cb7a01acSMauro Carvalho Chehab } 95cb7a01acSMauro Carvalho Chehab 96cb7a01acSMauro Carvalho Chehab static int tlv320aic23b_log_status(struct v4l2_subdev *sd) 97cb7a01acSMauro Carvalho Chehab { 98cb7a01acSMauro Carvalho Chehab struct tlv320aic23b_state *state = to_state(sd); 99cb7a01acSMauro Carvalho Chehab 100cb7a01acSMauro Carvalho Chehab v4l2_ctrl_handler_log_status(&state->hdl, sd->name); 101cb7a01acSMauro Carvalho Chehab return 0; 102cb7a01acSMauro Carvalho Chehab } 103cb7a01acSMauro Carvalho Chehab 104cb7a01acSMauro Carvalho Chehab /* ----------------------------------------------------------------------- */ 105cb7a01acSMauro Carvalho Chehab 106cb7a01acSMauro Carvalho Chehab static const struct v4l2_ctrl_ops tlv320aic23b_ctrl_ops = { 107cb7a01acSMauro Carvalho Chehab .s_ctrl = tlv320aic23b_s_ctrl, 108cb7a01acSMauro Carvalho Chehab }; 109cb7a01acSMauro Carvalho Chehab 110cb7a01acSMauro Carvalho Chehab static const struct v4l2_subdev_core_ops tlv320aic23b_core_ops = { 111cb7a01acSMauro Carvalho Chehab .log_status = tlv320aic23b_log_status, 112cb7a01acSMauro Carvalho Chehab }; 113cb7a01acSMauro Carvalho Chehab 114cb7a01acSMauro Carvalho Chehab static const struct v4l2_subdev_audio_ops tlv320aic23b_audio_ops = { 115cb7a01acSMauro Carvalho Chehab .s_clock_freq = tlv320aic23b_s_clock_freq, 116cb7a01acSMauro Carvalho Chehab }; 117cb7a01acSMauro Carvalho Chehab 118cb7a01acSMauro Carvalho Chehab static const struct v4l2_subdev_ops tlv320aic23b_ops = { 119cb7a01acSMauro Carvalho Chehab .core = &tlv320aic23b_core_ops, 120cb7a01acSMauro Carvalho Chehab .audio = &tlv320aic23b_audio_ops, 121cb7a01acSMauro Carvalho Chehab }; 122cb7a01acSMauro Carvalho Chehab 123cb7a01acSMauro Carvalho Chehab /* ----------------------------------------------------------------------- */ 124cb7a01acSMauro Carvalho Chehab 125cb7a01acSMauro Carvalho Chehab /* i2c implementation */ 126cb7a01acSMauro Carvalho Chehab 127cb7a01acSMauro Carvalho Chehab /* 128cb7a01acSMauro Carvalho Chehab * Generic i2c probe 129cb7a01acSMauro Carvalho Chehab * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' 130cb7a01acSMauro Carvalho Chehab */ 131cb7a01acSMauro Carvalho Chehab 132*c788e875SUwe Kleine-König static int tlv320aic23b_probe(struct i2c_client *client) 133cb7a01acSMauro Carvalho Chehab { 134cb7a01acSMauro Carvalho Chehab struct tlv320aic23b_state *state; 135cb7a01acSMauro Carvalho Chehab struct v4l2_subdev *sd; 136cb7a01acSMauro Carvalho Chehab 137cb7a01acSMauro Carvalho Chehab /* Check if the adapter supports the needed features */ 138cb7a01acSMauro Carvalho Chehab if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 139cb7a01acSMauro Carvalho Chehab return -EIO; 140cb7a01acSMauro Carvalho Chehab 141cb7a01acSMauro Carvalho Chehab v4l_info(client, "chip found @ 0x%x (%s)\n", 142cb7a01acSMauro Carvalho Chehab client->addr << 1, client->adapter->name); 143cb7a01acSMauro Carvalho Chehab 144c02b211dSLaurent Pinchart state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); 145cb7a01acSMauro Carvalho Chehab if (state == NULL) 146cb7a01acSMauro Carvalho Chehab return -ENOMEM; 147cb7a01acSMauro Carvalho Chehab sd = &state->sd; 148cb7a01acSMauro Carvalho Chehab v4l2_i2c_subdev_init(sd, client, &tlv320aic23b_ops); 149cb7a01acSMauro Carvalho Chehab 150cb7a01acSMauro Carvalho Chehab /* Initialize tlv320aic23b */ 151cb7a01acSMauro Carvalho Chehab 152cb7a01acSMauro Carvalho Chehab /* RESET */ 153cb7a01acSMauro Carvalho Chehab tlv320aic23b_write(sd, 15, 0x000); 154cb7a01acSMauro Carvalho Chehab /* turn off DAC & mic input */ 155cb7a01acSMauro Carvalho Chehab tlv320aic23b_write(sd, 6, 0x00A); 156cb7a01acSMauro Carvalho Chehab /* left-justified, 24-bit, master mode */ 157cb7a01acSMauro Carvalho Chehab tlv320aic23b_write(sd, 7, 0x049); 158cb7a01acSMauro Carvalho Chehab /* set gain on both channels to +3.0 dB */ 159cb7a01acSMauro Carvalho Chehab tlv320aic23b_write(sd, 0, 0x119); 160cb7a01acSMauro Carvalho Chehab /* set sample rate to 48 kHz */ 161cb7a01acSMauro Carvalho Chehab tlv320aic23b_write(sd, 8, 0x000); 162cb7a01acSMauro Carvalho Chehab /* activate digital interface */ 163cb7a01acSMauro Carvalho Chehab tlv320aic23b_write(sd, 9, 0x001); 164cb7a01acSMauro Carvalho Chehab 165cb7a01acSMauro Carvalho Chehab v4l2_ctrl_handler_init(&state->hdl, 1); 166cb7a01acSMauro Carvalho Chehab v4l2_ctrl_new_std(&state->hdl, &tlv320aic23b_ctrl_ops, 167cb7a01acSMauro Carvalho Chehab V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); 168cb7a01acSMauro Carvalho Chehab sd->ctrl_handler = &state->hdl; 169cb7a01acSMauro Carvalho Chehab if (state->hdl.error) { 170cb7a01acSMauro Carvalho Chehab int err = state->hdl.error; 171cb7a01acSMauro Carvalho Chehab 172cb7a01acSMauro Carvalho Chehab v4l2_ctrl_handler_free(&state->hdl); 173cb7a01acSMauro Carvalho Chehab return err; 174cb7a01acSMauro Carvalho Chehab } 175cb7a01acSMauro Carvalho Chehab v4l2_ctrl_handler_setup(&state->hdl); 176cb7a01acSMauro Carvalho Chehab return 0; 177cb7a01acSMauro Carvalho Chehab } 178cb7a01acSMauro Carvalho Chehab 179ed5c2f5fSUwe Kleine-König static void tlv320aic23b_remove(struct i2c_client *client) 180cb7a01acSMauro Carvalho Chehab { 181cb7a01acSMauro Carvalho Chehab struct v4l2_subdev *sd = i2c_get_clientdata(client); 182cb7a01acSMauro Carvalho Chehab struct tlv320aic23b_state *state = to_state(sd); 183cb7a01acSMauro Carvalho Chehab 184cb7a01acSMauro Carvalho Chehab v4l2_device_unregister_subdev(sd); 185cb7a01acSMauro Carvalho Chehab v4l2_ctrl_handler_free(&state->hdl); 186cb7a01acSMauro Carvalho Chehab } 187cb7a01acSMauro Carvalho Chehab 188cb7a01acSMauro Carvalho Chehab /* ----------------------------------------------------------------------- */ 189cb7a01acSMauro Carvalho Chehab 190cb7a01acSMauro Carvalho Chehab static const struct i2c_device_id tlv320aic23b_id[] = { 191cb7a01acSMauro Carvalho Chehab { "tlv320aic23b", 0 }, 192cb7a01acSMauro Carvalho Chehab { } 193cb7a01acSMauro Carvalho Chehab }; 194cb7a01acSMauro Carvalho Chehab MODULE_DEVICE_TABLE(i2c, tlv320aic23b_id); 195cb7a01acSMauro Carvalho Chehab 196cb7a01acSMauro Carvalho Chehab static struct i2c_driver tlv320aic23b_driver = { 197cb7a01acSMauro Carvalho Chehab .driver = { 198cb7a01acSMauro Carvalho Chehab .name = "tlv320aic23b", 199cb7a01acSMauro Carvalho Chehab }, 200*c788e875SUwe Kleine-König .probe_new = tlv320aic23b_probe, 201cb7a01acSMauro Carvalho Chehab .remove = tlv320aic23b_remove, 202cb7a01acSMauro Carvalho Chehab .id_table = tlv320aic23b_id, 203cb7a01acSMauro Carvalho Chehab }; 204cb7a01acSMauro Carvalho Chehab 205cb7a01acSMauro Carvalho Chehab module_i2c_driver(tlv320aic23b_driver); 206