1/* 2 * wm8775 - driver version 0.0.1 3 * 4 * Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to> 5 * 6 * Based on saa7115 driver 7 * 8 * Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl> 9 * - Cleanup 10 * - V4L2 API update 11 * - sound fixes 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 26 */ 27 28#include <linux/module.h> 29#include <linux/types.h> 30#include <linux/slab.h> 31#include <linux/ioctl.h> 32#include <asm/uaccess.h> 33#include <linux/i2c.h> 34#include <linux/videodev2.h> 35#include <media/v4l2-device.h> 36#include <media/v4l2-ctrls.h> 37#include <media/wm8775.h> 38 39MODULE_DESCRIPTION("wm8775 driver"); 40MODULE_AUTHOR("Ulf Eklund, Hans Verkuil"); 41MODULE_LICENSE("GPL"); 42 43 44 45/* ----------------------------------------------------------------------- */ 46 47enum { 48 R7 = 7, R11 = 11, 49 R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R23 = 23, 50 TOT_REGS 51}; 52 53#define ALC_HOLD 0x85 /* R17: use zero cross detection, ALC hold time 42.6 ms */ 54#define ALC_EN 0x100 /* R17: ALC enable */ 55 56struct wm8775_state { 57 struct v4l2_subdev sd; 58 struct v4l2_ctrl_handler hdl; 59 struct v4l2_ctrl *mute; 60 struct v4l2_ctrl *vol; 61 struct v4l2_ctrl *bal; 62 struct v4l2_ctrl *loud; 63 u8 input; /* Last selected input (0-0xf) */ 64}; 65 66static inline struct wm8775_state *to_state(struct v4l2_subdev *sd) 67{ 68 return container_of(sd, struct wm8775_state, sd); 69} 70 71static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) 72{ 73 return &container_of(ctrl->handler, struct wm8775_state, hdl)->sd; 74} 75 76static int wm8775_write(struct v4l2_subdev *sd, int reg, u16 val) 77{ 78 struct i2c_client *client = v4l2_get_subdevdata(sd); 79 int i; 80 81 if (reg < 0 || reg >= TOT_REGS) { 82 v4l2_err(sd, "Invalid register R%d\n", reg); 83 return -1; 84 } 85 86 for (i = 0; i < 3; i++) 87 if (i2c_smbus_write_byte_data(client, 88 (reg << 1) | (val >> 8), val & 0xff) == 0) 89 return 0; 90 v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg); 91 return -1; 92} 93 94static void wm8775_set_audio(struct v4l2_subdev *sd, int quietly) 95{ 96 struct wm8775_state *state = to_state(sd); 97 u8 vol_l, vol_r; 98 int muted = 0 != state->mute->val; 99 u16 volume = (u16)state->vol->val; 100 u16 balance = (u16)state->bal->val; 101 102 /* normalize ( 65535 to 0 -> 255 to 0 (+24dB to -103dB) ) */ 103 vol_l = (min(65536 - balance, 32768) * volume) >> 23; 104 vol_r = (min(balance, (u16)32768) * volume) >> 23; 105 106 /* Mute */ 107 if (muted || quietly) 108 wm8775_write(sd, R21, 0x0c0 | state->input); 109 110 wm8775_write(sd, R14, vol_l | 0x100); /* 0x100= Left channel ADC zero cross enable */ 111 wm8775_write(sd, R15, vol_r | 0x100); /* 0x100= Right channel ADC zero cross enable */ 112 113 /* Un-mute */ 114 if (!muted) 115 wm8775_write(sd, R21, state->input); 116} 117 118static int wm8775_s_routing(struct v4l2_subdev *sd, 119 u32 input, u32 output, u32 config) 120{ 121 struct wm8775_state *state = to_state(sd); 122 123 /* There are 4 inputs and one output. Zero or more inputs 124 are multiplexed together to the output. Hence there are 125 16 combinations. 126 If only one input is active (the normal case) then the 127 input values 1, 2, 4 or 8 should be used. */ 128 if (input > 15) { 129 v4l2_err(sd, "Invalid input %d.\n", input); 130 return -EINVAL; 131 } 132 state->input = input; 133 if (v4l2_ctrl_g_ctrl(state->mute)) 134 return 0; 135 if (!v4l2_ctrl_g_ctrl(state->vol)) 136 return 0; 137 wm8775_set_audio(sd, 1); 138 return 0; 139} 140 141static int wm8775_s_ctrl(struct v4l2_ctrl *ctrl) 142{ 143 struct v4l2_subdev *sd = to_sd(ctrl); 144 145 switch (ctrl->id) { 146 case V4L2_CID_AUDIO_MUTE: 147 case V4L2_CID_AUDIO_VOLUME: 148 case V4L2_CID_AUDIO_BALANCE: 149 wm8775_set_audio(sd, 0); 150 return 0; 151 case V4L2_CID_AUDIO_LOUDNESS: 152 wm8775_write(sd, R17, (ctrl->val ? ALC_EN : 0) | ALC_HOLD); 153 return 0; 154 } 155 return -EINVAL; 156} 157 158static int wm8775_log_status(struct v4l2_subdev *sd) 159{ 160 struct wm8775_state *state = to_state(sd); 161 162 v4l2_info(sd, "Input: %d\n", state->input); 163 v4l2_ctrl_handler_log_status(&state->hdl, sd->name); 164 return 0; 165} 166 167static int wm8775_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *freq) 168{ 169 wm8775_set_audio(sd, 0); 170 return 0; 171} 172 173/* ----------------------------------------------------------------------- */ 174 175static const struct v4l2_ctrl_ops wm8775_ctrl_ops = { 176 .s_ctrl = wm8775_s_ctrl, 177}; 178 179static const struct v4l2_subdev_core_ops wm8775_core_ops = { 180 .log_status = wm8775_log_status, 181 .g_ext_ctrls = v4l2_subdev_g_ext_ctrls, 182 .try_ext_ctrls = v4l2_subdev_try_ext_ctrls, 183 .s_ext_ctrls = v4l2_subdev_s_ext_ctrls, 184 .g_ctrl = v4l2_subdev_g_ctrl, 185 .s_ctrl = v4l2_subdev_s_ctrl, 186 .queryctrl = v4l2_subdev_queryctrl, 187 .querymenu = v4l2_subdev_querymenu, 188}; 189 190static const struct v4l2_subdev_tuner_ops wm8775_tuner_ops = { 191 .s_frequency = wm8775_s_frequency, 192}; 193 194static const struct v4l2_subdev_audio_ops wm8775_audio_ops = { 195 .s_routing = wm8775_s_routing, 196}; 197 198static const struct v4l2_subdev_ops wm8775_ops = { 199 .core = &wm8775_core_ops, 200 .tuner = &wm8775_tuner_ops, 201 .audio = &wm8775_audio_ops, 202}; 203 204/* ----------------------------------------------------------------------- */ 205 206/* i2c implementation */ 207 208/* 209 * Generic i2c probe 210 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' 211 */ 212 213static int wm8775_probe(struct i2c_client *client, 214 const struct i2c_device_id *id) 215{ 216 struct wm8775_state *state; 217 struct v4l2_subdev *sd; 218 int err; 219 bool is_nova_s = false; 220 221 if (client->dev.platform_data) { 222 struct wm8775_platform_data *data = client->dev.platform_data; 223 is_nova_s = data->is_nova_s; 224 } 225 226 /* Check if the adapter supports the needed features */ 227 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 228 return -EIO; 229 230 v4l_info(client, "chip found @ 0x%02x (%s)\n", 231 client->addr << 1, client->adapter->name); 232 233 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); 234 if (state == NULL) 235 return -ENOMEM; 236 sd = &state->sd; 237 v4l2_i2c_subdev_init(sd, client, &wm8775_ops); 238 state->input = 2; 239 240 v4l2_ctrl_handler_init(&state->hdl, 4); 241 state->mute = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops, 242 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); 243 state->vol = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops, 244 V4L2_CID_AUDIO_VOLUME, 0, 65535, (65535+99)/100, 0xCF00); /* 0dB*/ 245 state->bal = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops, 246 V4L2_CID_AUDIO_BALANCE, 0, 65535, (65535+99)/100, 32768); 247 state->loud = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops, 248 V4L2_CID_AUDIO_LOUDNESS, 0, 1, 1, 1); 249 sd->ctrl_handler = &state->hdl; 250 err = state->hdl.error; 251 if (err) { 252 v4l2_ctrl_handler_free(&state->hdl); 253 return err; 254 } 255 256 /* Initialize wm8775 */ 257 258 /* RESET */ 259 wm8775_write(sd, R23, 0x000); 260 /* Disable zero cross detect timeout */ 261 wm8775_write(sd, R7, 0x000); 262 /* HPF enable, left justified, 24-bit (Philips) mode */ 263 wm8775_write(sd, R11, 0x021); 264 /* Master mode, clock ratio 256fs */ 265 wm8775_write(sd, R12, 0x102); 266 /* Powered up */ 267 wm8775_write(sd, R13, 0x000); 268 269 if (!is_nova_s) { 270 /* ADC gain +2.5dB, enable zero cross */ 271 wm8775_write(sd, R14, 0x1d4); 272 /* ADC gain +2.5dB, enable zero cross */ 273 wm8775_write(sd, R15, 0x1d4); 274 /* ALC Stereo, ALC target level -1dB FS max gain +8dB */ 275 wm8775_write(sd, R16, 0x1bf); 276 /* Enable gain control, use zero cross detection, 277 ALC hold time 42.6 ms */ 278 wm8775_write(sd, R17, 0x185); 279 } else { 280 /* ALC stereo, ALC target level -5dB FS, ALC max gain +8dB */ 281 wm8775_write(sd, R16, 0x1bb); 282 /* Set ALC mode and hold time */ 283 wm8775_write(sd, R17, (state->loud->val ? ALC_EN : 0) | ALC_HOLD); 284 } 285 /* ALC gain ramp up delay 34 s, ALC gain ramp down delay 33 ms */ 286 wm8775_write(sd, R18, 0x0a2); 287 /* Enable noise gate, threshold -72dBfs */ 288 wm8775_write(sd, R19, 0x005); 289 if (!is_nova_s) { 290 /* Transient window 4ms, lower PGA gain limit -1dB */ 291 wm8775_write(sd, R20, 0x07a); 292 /* LRBOTH = 1, use input 2. */ 293 wm8775_write(sd, R21, 0x102); 294 } else { 295 /* Transient window 4ms, ALC min gain -5dB */ 296 wm8775_write(sd, R20, 0x0fb); 297 298 wm8775_set_audio(sd, 1); /* set volume/mute/mux */ 299 } 300 return 0; 301} 302 303static int wm8775_remove(struct i2c_client *client) 304{ 305 struct v4l2_subdev *sd = i2c_get_clientdata(client); 306 struct wm8775_state *state = to_state(sd); 307 308 v4l2_device_unregister_subdev(sd); 309 v4l2_ctrl_handler_free(&state->hdl); 310 return 0; 311} 312 313static const struct i2c_device_id wm8775_id[] = { 314 { "wm8775", 0 }, 315 { } 316}; 317MODULE_DEVICE_TABLE(i2c, wm8775_id); 318 319static struct i2c_driver wm8775_driver = { 320 .driver = { 321 .owner = THIS_MODULE, 322 .name = "wm8775", 323 }, 324 .probe = wm8775_probe, 325 .remove = wm8775_remove, 326 .id_table = wm8775_id, 327}; 328 329module_i2c_driver(wm8775_driver); 330