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-chip-ident.h> 37 #include <media/v4l2-ctrls.h> 38 #include <media/wm8775.h> 39 40 MODULE_DESCRIPTION("wm8775 driver"); 41 MODULE_AUTHOR("Ulf Eklund, Hans Verkuil"); 42 MODULE_LICENSE("GPL"); 43 44 45 46 /* ----------------------------------------------------------------------- */ 47 48 enum { 49 R7 = 7, R11 = 11, 50 R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R23 = 23, 51 TOT_REGS 52 }; 53 54 #define ALC_HOLD 0x85 /* R17: use zero cross detection, ALC hold time 42.6 ms */ 55 #define ALC_EN 0x100 /* R17: ALC enable */ 56 57 struct wm8775_state { 58 struct v4l2_subdev sd; 59 struct v4l2_ctrl_handler hdl; 60 struct v4l2_ctrl *mute; 61 struct v4l2_ctrl *vol; 62 struct v4l2_ctrl *bal; 63 struct v4l2_ctrl *loud; 64 u8 input; /* Last selected input (0-0xf) */ 65 }; 66 67 static inline struct wm8775_state *to_state(struct v4l2_subdev *sd) 68 { 69 return container_of(sd, struct wm8775_state, sd); 70 } 71 72 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) 73 { 74 return &container_of(ctrl->handler, struct wm8775_state, hdl)->sd; 75 } 76 77 static int wm8775_write(struct v4l2_subdev *sd, int reg, u16 val) 78 { 79 struct i2c_client *client = v4l2_get_subdevdata(sd); 80 int i; 81 82 if (reg < 0 || reg >= TOT_REGS) { 83 v4l2_err(sd, "Invalid register R%d\n", reg); 84 return -1; 85 } 86 87 for (i = 0; i < 3; i++) 88 if (i2c_smbus_write_byte_data(client, 89 (reg << 1) | (val >> 8), val & 0xff) == 0) 90 return 0; 91 v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg); 92 return -1; 93 } 94 95 static void wm8775_set_audio(struct v4l2_subdev *sd, int quietly) 96 { 97 struct wm8775_state *state = to_state(sd); 98 u8 vol_l, vol_r; 99 int muted = 0 != state->mute->val; 100 u16 volume = (u16)state->vol->val; 101 u16 balance = (u16)state->bal->val; 102 103 /* normalize ( 65535 to 0 -> 255 to 0 (+24dB to -103dB) ) */ 104 vol_l = (min(65536 - balance, 32768) * volume) >> 23; 105 vol_r = (min(balance, (u16)32768) * volume) >> 23; 106 107 /* Mute */ 108 if (muted || quietly) 109 wm8775_write(sd, R21, 0x0c0 | state->input); 110 111 wm8775_write(sd, R14, vol_l | 0x100); /* 0x100= Left channel ADC zero cross enable */ 112 wm8775_write(sd, R15, vol_r | 0x100); /* 0x100= Right channel ADC zero cross enable */ 113 114 /* Un-mute */ 115 if (!muted) 116 wm8775_write(sd, R21, state->input); 117 } 118 119 static int wm8775_s_routing(struct v4l2_subdev *sd, 120 u32 input, u32 output, u32 config) 121 { 122 struct wm8775_state *state = to_state(sd); 123 124 /* There are 4 inputs and one output. Zero or more inputs 125 are multiplexed together to the output. Hence there are 126 16 combinations. 127 If only one input is active (the normal case) then the 128 input values 1, 2, 4 or 8 should be used. */ 129 if (input > 15) { 130 v4l2_err(sd, "Invalid input %d.\n", input); 131 return -EINVAL; 132 } 133 state->input = input; 134 if (!v4l2_ctrl_g_ctrl(state->mute)) 135 return 0; 136 if (!v4l2_ctrl_g_ctrl(state->vol)) 137 return 0; 138 if (!v4l2_ctrl_g_ctrl(state->bal)) 139 return 0; 140 wm8775_set_audio(sd, 1); 141 return 0; 142 } 143 144 static int wm8775_s_ctrl(struct v4l2_ctrl *ctrl) 145 { 146 struct v4l2_subdev *sd = to_sd(ctrl); 147 148 switch (ctrl->id) { 149 case V4L2_CID_AUDIO_MUTE: 150 case V4L2_CID_AUDIO_VOLUME: 151 case V4L2_CID_AUDIO_BALANCE: 152 wm8775_set_audio(sd, 0); 153 return 0; 154 case V4L2_CID_AUDIO_LOUDNESS: 155 wm8775_write(sd, R17, (ctrl->val ? ALC_EN : 0) | ALC_HOLD); 156 return 0; 157 } 158 return -EINVAL; 159 } 160 161 static int wm8775_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) 162 { 163 struct i2c_client *client = v4l2_get_subdevdata(sd); 164 165 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_WM8775, 0); 166 } 167 168 static int wm8775_log_status(struct v4l2_subdev *sd) 169 { 170 struct wm8775_state *state = to_state(sd); 171 172 v4l2_info(sd, "Input: %d\n", state->input); 173 v4l2_ctrl_handler_log_status(&state->hdl, sd->name); 174 return 0; 175 } 176 177 static int wm8775_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *freq) 178 { 179 wm8775_set_audio(sd, 0); 180 return 0; 181 } 182 183 /* ----------------------------------------------------------------------- */ 184 185 static const struct v4l2_ctrl_ops wm8775_ctrl_ops = { 186 .s_ctrl = wm8775_s_ctrl, 187 }; 188 189 static const struct v4l2_subdev_core_ops wm8775_core_ops = { 190 .log_status = wm8775_log_status, 191 .g_chip_ident = wm8775_g_chip_ident, 192 .g_ext_ctrls = v4l2_subdev_g_ext_ctrls, 193 .try_ext_ctrls = v4l2_subdev_try_ext_ctrls, 194 .s_ext_ctrls = v4l2_subdev_s_ext_ctrls, 195 .g_ctrl = v4l2_subdev_g_ctrl, 196 .s_ctrl = v4l2_subdev_s_ctrl, 197 .queryctrl = v4l2_subdev_queryctrl, 198 .querymenu = v4l2_subdev_querymenu, 199 }; 200 201 static const struct v4l2_subdev_tuner_ops wm8775_tuner_ops = { 202 .s_frequency = wm8775_s_frequency, 203 }; 204 205 static const struct v4l2_subdev_audio_ops wm8775_audio_ops = { 206 .s_routing = wm8775_s_routing, 207 }; 208 209 static const struct v4l2_subdev_ops wm8775_ops = { 210 .core = &wm8775_core_ops, 211 .tuner = &wm8775_tuner_ops, 212 .audio = &wm8775_audio_ops, 213 }; 214 215 /* ----------------------------------------------------------------------- */ 216 217 /* i2c implementation */ 218 219 /* 220 * Generic i2c probe 221 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' 222 */ 223 224 static int wm8775_probe(struct i2c_client *client, 225 const struct i2c_device_id *id) 226 { 227 struct wm8775_state *state; 228 struct v4l2_subdev *sd; 229 int err; 230 bool is_nova_s = false; 231 232 if (client->dev.platform_data) { 233 struct wm8775_platform_data *data = client->dev.platform_data; 234 is_nova_s = data->is_nova_s; 235 } 236 237 /* Check if the adapter supports the needed features */ 238 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 239 return -EIO; 240 241 v4l_info(client, "chip found @ 0x%02x (%s)\n", 242 client->addr << 1, client->adapter->name); 243 244 state = kzalloc(sizeof(struct wm8775_state), GFP_KERNEL); 245 if (state == NULL) 246 return -ENOMEM; 247 sd = &state->sd; 248 v4l2_i2c_subdev_init(sd, client, &wm8775_ops); 249 state->input = 2; 250 251 v4l2_ctrl_handler_init(&state->hdl, 4); 252 state->mute = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops, 253 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); 254 state->vol = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops, 255 V4L2_CID_AUDIO_VOLUME, 0, 65535, (65535+99)/100, 0xCF00); /* 0dB*/ 256 state->bal = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops, 257 V4L2_CID_AUDIO_BALANCE, 0, 65535, (65535+99)/100, 32768); 258 state->loud = v4l2_ctrl_new_std(&state->hdl, &wm8775_ctrl_ops, 259 V4L2_CID_AUDIO_LOUDNESS, 0, 1, 1, 1); 260 sd->ctrl_handler = &state->hdl; 261 err = state->hdl.error; 262 if (err) { 263 v4l2_ctrl_handler_free(&state->hdl); 264 kfree(state); 265 return err; 266 } 267 268 /* Initialize wm8775 */ 269 270 /* RESET */ 271 wm8775_write(sd, R23, 0x000); 272 /* Disable zero cross detect timeout */ 273 wm8775_write(sd, R7, 0x000); 274 /* HPF enable, left justified, 24-bit (Philips) mode */ 275 wm8775_write(sd, R11, 0x021); 276 /* Master mode, clock ratio 256fs */ 277 wm8775_write(sd, R12, 0x102); 278 /* Powered up */ 279 wm8775_write(sd, R13, 0x000); 280 281 if (!is_nova_s) { 282 /* ADC gain +2.5dB, enable zero cross */ 283 wm8775_write(sd, R14, 0x1d4); 284 /* ADC gain +2.5dB, enable zero cross */ 285 wm8775_write(sd, R15, 0x1d4); 286 /* ALC Stereo, ALC target level -1dB FS max gain +8dB */ 287 wm8775_write(sd, R16, 0x1bf); 288 /* Enable gain control, use zero cross detection, 289 ALC hold time 42.6 ms */ 290 wm8775_write(sd, R17, 0x185); 291 } else { 292 /* ALC stereo, ALC target level -5dB FS, ALC max gain +8dB */ 293 wm8775_write(sd, R16, 0x1bb); 294 /* Set ALC mode and hold time */ 295 wm8775_write(sd, R17, (state->loud->val ? ALC_EN : 0) | ALC_HOLD); 296 } 297 /* ALC gain ramp up delay 34 s, ALC gain ramp down delay 33 ms */ 298 wm8775_write(sd, R18, 0x0a2); 299 /* Enable noise gate, threshold -72dBfs */ 300 wm8775_write(sd, R19, 0x005); 301 if (!is_nova_s) { 302 /* Transient window 4ms, lower PGA gain limit -1dB */ 303 wm8775_write(sd, R20, 0x07a); 304 /* LRBOTH = 1, use input 2. */ 305 wm8775_write(sd, R21, 0x102); 306 } else { 307 /* Transient window 4ms, ALC min gain -5dB */ 308 wm8775_write(sd, R20, 0x0fb); 309 310 wm8775_set_audio(sd, 1); /* set volume/mute/mux */ 311 } 312 return 0; 313 } 314 315 static int wm8775_remove(struct i2c_client *client) 316 { 317 struct v4l2_subdev *sd = i2c_get_clientdata(client); 318 struct wm8775_state *state = to_state(sd); 319 320 v4l2_device_unregister_subdev(sd); 321 v4l2_ctrl_handler_free(&state->hdl); 322 kfree(state); 323 return 0; 324 } 325 326 static const struct i2c_device_id wm8775_id[] = { 327 { "wm8775", 0 }, 328 { } 329 }; 330 MODULE_DEVICE_TABLE(i2c, wm8775_id); 331 332 static struct i2c_driver wm8775_driver = { 333 .driver = { 334 .owner = THIS_MODULE, 335 .name = "wm8775", 336 }, 337 .probe = wm8775_probe, 338 .remove = wm8775_remove, 339 .id_table = wm8775_id, 340 }; 341 342 module_i2c_driver(wm8775_driver); 343