1 /* 2 * saa7706.c Philips SAA7706H Car Radio DSP driver 3 * Copyright (c) 2009 Intel Corporation 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 17 */ 18 19 #include <linux/module.h> 20 #include <linux/init.h> 21 #include <linux/delay.h> 22 #include <linux/errno.h> 23 #include <linux/kernel.h> 24 #include <linux/interrupt.h> 25 #include <linux/i2c.h> 26 #include <linux/slab.h> 27 #include <media/v4l2-device.h> 28 #include <media/v4l2-ctrls.h> 29 30 #define DRIVER_NAME "saa7706h" 31 32 /* the I2C memory map looks like this 33 34 $1C00 - $FFFF Not Used 35 $2200 - $3FFF Reserved YRAM (DSP2) space 36 $2000 - $21FF YRAM (DSP2) 37 $1FF0 - $1FFF Hardware Registers 38 $1280 - $1FEF Reserved XRAM (DSP2) space 39 $1000 - $127F XRAM (DSP2) 40 $0FFF DSP CONTROL 41 $0A00 - $0FFE Reserved 42 $0980 - $09FF Reserved YRAM (DSP1) space 43 $0800 - $097F YRAM (DSP1) 44 $0200 - $07FF Not Used 45 $0180 - $01FF Reserved XRAM (DSP1) space 46 $0000 - $017F XRAM (DSP1) 47 */ 48 49 #define SAA7706H_REG_CTRL 0x0fff 50 #define SAA7706H_CTRL_BYP_PLL 0x0001 51 #define SAA7706H_CTRL_PLL_DIV_MASK 0x003e 52 #define SAA7706H_CTRL_PLL3_62975MHZ 0x003e 53 #define SAA7706H_CTRL_DSP_TURBO 0x0040 54 #define SAA7706H_CTRL_PC_RESET_DSP1 0x0080 55 #define SAA7706H_CTRL_PC_RESET_DSP2 0x0100 56 #define SAA7706H_CTRL_DSP1_ROM_EN_MASK 0x0600 57 #define SAA7706H_CTRL_DSP1_FUNC_PROM 0x0000 58 #define SAA7706H_CTRL_DSP2_ROM_EN_MASK 0x1800 59 #define SAA7706H_CTRL_DSP2_FUNC_PROM 0x0000 60 #define SAA7706H_CTRL_DIG_SIL_INTERPOL 0x8000 61 62 #define SAA7706H_REG_EVALUATION 0x1ff0 63 #define SAA7706H_EVAL_DISABLE_CHARGE_PUMP 0x000001 64 #define SAA7706H_EVAL_DCS_CLOCK 0x000002 65 #define SAA7706H_EVAL_GNDRC1_ENABLE 0x000004 66 #define SAA7706H_EVAL_GNDRC2_ENABLE 0x000008 67 68 #define SAA7706H_REG_CL_GEN1 0x1ff3 69 #define SAA7706H_CL_GEN1_MIN_LOOPGAIN_MASK 0x00000f 70 #define SAA7706H_CL_GEN1_LOOPGAIN_MASK 0x0000f0 71 #define SAA7706H_CL_GEN1_COARSE_RATION 0xffff00 72 73 #define SAA7706H_REG_CL_GEN2 0x1ff4 74 #define SAA7706H_CL_GEN2_WSEDGE_FALLING 0x000001 75 #define SAA7706H_CL_GEN2_STOP_VCO 0x000002 76 #define SAA7706H_CL_GEN2_FRERUN 0x000004 77 #define SAA7706H_CL_GEN2_ADAPTIVE 0x000008 78 #define SAA7706H_CL_GEN2_FINE_RATIO_MASK 0x0ffff0 79 80 #define SAA7706H_REG_CL_GEN4 0x1ff6 81 #define SAA7706H_CL_GEN4_BYPASS_PLL1 0x001000 82 #define SAA7706H_CL_GEN4_PLL1_DIV_MASK 0x03e000 83 #define SAA7706H_CL_GEN4_DSP1_TURBO 0x040000 84 85 #define SAA7706H_REG_SEL 0x1ff7 86 #define SAA7706H_SEL_DSP2_SRCA_MASK 0x000007 87 #define SAA7706H_SEL_DSP2_FMTA_MASK 0x000031 88 #define SAA7706H_SEL_DSP2_SRCB_MASK 0x0001c0 89 #define SAA7706H_SEL_DSP2_FMTB_MASK 0x000e00 90 #define SAA7706H_SEL_DSP1_SRC_MASK 0x003000 91 #define SAA7706H_SEL_DSP1_FMT_MASK 0x01c003 92 #define SAA7706H_SEL_SPDIF2 0x020000 93 #define SAA7706H_SEL_HOST_IO_FMT_MASK 0x1c0000 94 #define SAA7706H_SEL_EN_HOST_IO 0x200000 95 96 #define SAA7706H_REG_IAC 0x1ff8 97 #define SAA7706H_REG_CLK_SET 0x1ff9 98 #define SAA7706H_REG_CLK_COEFF 0x1ffa 99 #define SAA7706H_REG_INPUT_SENS 0x1ffb 100 #define SAA7706H_INPUT_SENS_RDS_VOL_MASK 0x0003f 101 #define SAA7706H_INPUT_SENS_FM_VOL_MASK 0x00fc0 102 #define SAA7706H_INPUT_SENS_FM_MPX 0x01000 103 #define SAA7706H_INPUT_SENS_OFF_FILTER_A_EN 0x02000 104 #define SAA7706H_INPUT_SENS_OFF_FILTER_B_EN 0x04000 105 #define SAA7706H_REG_PHONE_NAV_AUDIO 0x1ffc 106 #define SAA7706H_REG_IO_CONF_DSP2 0x1ffd 107 #define SAA7706H_REG_STATUS_DSP2 0x1ffe 108 #define SAA7706H_REG_PC_DSP2 0x1fff 109 110 #define SAA7706H_DSP1_MOD0 0x0800 111 #define SAA7706H_DSP1_ROM_VER 0x097f 112 #define SAA7706H_DSP2_MPTR0 0x1000 113 114 #define SAA7706H_DSP1_MODPNTR 0x0000 115 116 #define SAA7706H_DSP2_XMEM_CONTLLCW 0x113e 117 #define SAA7706H_DSP2_XMEM_BUSAMP 0x114a 118 #define SAA7706H_DSP2_XMEM_FDACPNTR 0x11f9 119 #define SAA7706H_DSP2_XMEM_IIS1PNTR 0x11fb 120 121 #define SAA7706H_DSP2_YMEM_PVGA 0x212a 122 #define SAA7706H_DSP2_YMEM_PVAT1 0x212b 123 #define SAA7706H_DSP2_YMEM_PVAT 0x212c 124 #define SAA7706H_DSP2_YMEM_ROM_VER 0x21ff 125 126 #define SUPPORTED_DSP1_ROM_VER 0x667 127 128 struct saa7706h_state { 129 struct v4l2_subdev sd; 130 struct v4l2_ctrl_handler hdl; 131 unsigned muted; 132 }; 133 134 static inline struct saa7706h_state *to_state(struct v4l2_subdev *sd) 135 { 136 return container_of(sd, struct saa7706h_state, sd); 137 } 138 139 static int saa7706h_i2c_send(struct i2c_client *client, const u8 *data, int len) 140 { 141 int err = i2c_master_send(client, data, len); 142 if (err == len) 143 return 0; 144 return err > 0 ? -EIO : err; 145 } 146 147 static int saa7706h_i2c_transfer(struct i2c_client *client, 148 struct i2c_msg *msgs, int num) 149 { 150 int err = i2c_transfer(client->adapter, msgs, num); 151 if (err == num) 152 return 0; 153 return err > 0 ? -EIO : err; 154 } 155 156 static int saa7706h_set_reg24(struct v4l2_subdev *sd, u16 reg, u32 val) 157 { 158 struct i2c_client *client = v4l2_get_subdevdata(sd); 159 u8 buf[5]; 160 int pos = 0; 161 162 buf[pos++] = reg >> 8; 163 buf[pos++] = reg; 164 buf[pos++] = val >> 16; 165 buf[pos++] = val >> 8; 166 buf[pos++] = val; 167 168 return saa7706h_i2c_send(client, buf, pos); 169 } 170 171 static int saa7706h_set_reg24_err(struct v4l2_subdev *sd, u16 reg, u32 val, 172 int *err) 173 { 174 return *err ? *err : saa7706h_set_reg24(sd, reg, val); 175 } 176 177 static int saa7706h_set_reg16(struct v4l2_subdev *sd, u16 reg, u16 val) 178 { 179 struct i2c_client *client = v4l2_get_subdevdata(sd); 180 u8 buf[4]; 181 int pos = 0; 182 183 buf[pos++] = reg >> 8; 184 buf[pos++] = reg; 185 buf[pos++] = val >> 8; 186 buf[pos++] = val; 187 188 return saa7706h_i2c_send(client, buf, pos); 189 } 190 191 static int saa7706h_set_reg16_err(struct v4l2_subdev *sd, u16 reg, u16 val, 192 int *err) 193 { 194 return *err ? *err : saa7706h_set_reg16(sd, reg, val); 195 } 196 197 static int saa7706h_get_reg16(struct v4l2_subdev *sd, u16 reg) 198 { 199 struct i2c_client *client = v4l2_get_subdevdata(sd); 200 u8 buf[2]; 201 int err; 202 u8 regaddr[] = {reg >> 8, reg}; 203 struct i2c_msg msg[] = { 204 { 205 .addr = client->addr, 206 .len = sizeof(regaddr), 207 .buf = regaddr 208 }, 209 { 210 .addr = client->addr, 211 .flags = I2C_M_RD, 212 .len = sizeof(buf), 213 .buf = buf 214 } 215 }; 216 217 err = saa7706h_i2c_transfer(client, msg, ARRAY_SIZE(msg)); 218 if (err) 219 return err; 220 221 return buf[0] << 8 | buf[1]; 222 } 223 224 static int saa7706h_unmute(struct v4l2_subdev *sd) 225 { 226 struct saa7706h_state *state = to_state(sd); 227 int err = 0; 228 229 err = saa7706h_set_reg16_err(sd, SAA7706H_REG_CTRL, 230 SAA7706H_CTRL_PLL3_62975MHZ | SAA7706H_CTRL_PC_RESET_DSP1 | 231 SAA7706H_CTRL_PC_RESET_DSP2, &err); 232 233 /* newer versions of the chip requires a small sleep after reset */ 234 msleep(1); 235 236 err = saa7706h_set_reg16_err(sd, SAA7706H_REG_CTRL, 237 SAA7706H_CTRL_PLL3_62975MHZ, &err); 238 239 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_EVALUATION, 0, &err); 240 241 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN1, 0x040022, &err); 242 243 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN2, 244 SAA7706H_CL_GEN2_WSEDGE_FALLING, &err); 245 246 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN4, 0x024080, &err); 247 248 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_SEL, 0x200080, &err); 249 250 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_IAC, 0xf4caed, &err); 251 252 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CLK_SET, 0x124334, &err); 253 254 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CLK_COEFF, 0x004a1a, 255 &err); 256 257 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_INPUT_SENS, 0x0071c7, 258 &err); 259 260 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_PHONE_NAV_AUDIO, 261 0x0e22ff, &err); 262 263 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_IO_CONF_DSP2, 0x001ff8, 264 &err); 265 266 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_STATUS_DSP2, 0x080003, 267 &err); 268 269 err = saa7706h_set_reg24_err(sd, SAA7706H_REG_PC_DSP2, 0x000004, &err); 270 271 err = saa7706h_set_reg16_err(sd, SAA7706H_DSP1_MOD0, 0x0c6c, &err); 272 273 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_MPTR0, 0x000b4b, &err); 274 275 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP1_MODPNTR, 0x000600, &err); 276 277 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP1_MODPNTR, 0x0000c0, &err); 278 279 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x000819, 280 &err); 281 282 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x00085a, 283 &err); 284 285 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_BUSAMP, 0x7fffff, 286 &err); 287 288 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_FDACPNTR, 0x2000cb, 289 &err); 290 291 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_IIS1PNTR, 0x2000cb, 292 &err); 293 294 err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVGA, 0x0f80, &err); 295 296 err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVAT1, 0x0800, 297 &err); 298 299 err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVAT, 0x0800, &err); 300 301 err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x000905, 302 &err); 303 if (!err) 304 state->muted = 0; 305 return err; 306 } 307 308 static int saa7706h_mute(struct v4l2_subdev *sd) 309 { 310 struct saa7706h_state *state = to_state(sd); 311 int err; 312 313 err = saa7706h_set_reg16(sd, SAA7706H_REG_CTRL, 314 SAA7706H_CTRL_PLL3_62975MHZ | SAA7706H_CTRL_PC_RESET_DSP1 | 315 SAA7706H_CTRL_PC_RESET_DSP2); 316 if (!err) 317 state->muted = 1; 318 return err; 319 } 320 321 static int saa7706h_s_ctrl(struct v4l2_ctrl *ctrl) 322 { 323 struct saa7706h_state *state = 324 container_of(ctrl->handler, struct saa7706h_state, hdl); 325 326 switch (ctrl->id) { 327 case V4L2_CID_AUDIO_MUTE: 328 if (ctrl->val) 329 return saa7706h_mute(&state->sd); 330 return saa7706h_unmute(&state->sd); 331 } 332 return -EINVAL; 333 } 334 335 static const struct v4l2_ctrl_ops saa7706h_ctrl_ops = { 336 .s_ctrl = saa7706h_s_ctrl, 337 }; 338 339 static const struct v4l2_subdev_ops empty_ops = {}; 340 341 /* 342 * Generic i2c probe 343 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' 344 */ 345 346 static int saa7706h_probe(struct i2c_client *client, 347 const struct i2c_device_id *id) 348 { 349 struct saa7706h_state *state; 350 struct v4l2_subdev *sd; 351 int err; 352 353 /* Check if the adapter supports the needed features */ 354 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 355 return -EIO; 356 357 v4l_info(client, "chip found @ 0x%02x (%s)\n", 358 client->addr << 1, client->adapter->name); 359 360 state = kzalloc(sizeof(struct saa7706h_state), GFP_KERNEL); 361 if (state == NULL) 362 return -ENOMEM; 363 sd = &state->sd; 364 v4l2_i2c_subdev_init(sd, client, &empty_ops); 365 366 v4l2_ctrl_handler_init(&state->hdl, 4); 367 v4l2_ctrl_new_std(&state->hdl, &saa7706h_ctrl_ops, 368 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); 369 sd->ctrl_handler = &state->hdl; 370 err = state->hdl.error; 371 if (err) 372 goto err; 373 374 /* check the rom versions */ 375 err = saa7706h_get_reg16(sd, SAA7706H_DSP1_ROM_VER); 376 if (err < 0) 377 goto err; 378 if (err != SUPPORTED_DSP1_ROM_VER) 379 v4l2_warn(sd, "Unknown DSP1 ROM code version: 0x%x\n", err); 380 state->muted = 1; 381 382 /* startup in a muted state */ 383 err = saa7706h_mute(sd); 384 if (err) 385 goto err; 386 387 return 0; 388 389 err: 390 v4l2_device_unregister_subdev(sd); 391 v4l2_ctrl_handler_free(&state->hdl); 392 kfree(to_state(sd)); 393 394 printk(KERN_ERR DRIVER_NAME ": Failed to probe: %d\n", err); 395 396 return err; 397 } 398 399 static int saa7706h_remove(struct i2c_client *client) 400 { 401 struct v4l2_subdev *sd = i2c_get_clientdata(client); 402 struct saa7706h_state *state = to_state(sd); 403 404 saa7706h_mute(sd); 405 v4l2_device_unregister_subdev(sd); 406 v4l2_ctrl_handler_free(&state->hdl); 407 kfree(to_state(sd)); 408 return 0; 409 } 410 411 static const struct i2c_device_id saa7706h_id[] = { 412 {DRIVER_NAME, 0}, 413 {}, 414 }; 415 416 MODULE_DEVICE_TABLE(i2c, saa7706h_id); 417 418 static struct i2c_driver saa7706h_driver = { 419 .driver = { 420 .name = DRIVER_NAME, 421 }, 422 .probe = saa7706h_probe, 423 .remove = saa7706h_remove, 424 .id_table = saa7706h_id, 425 }; 426 427 module_i2c_driver(saa7706h_driver); 428 429 MODULE_DESCRIPTION("SAA7706H Car Radio DSP driver"); 430 MODULE_AUTHOR("Mocean Laboratories"); 431 MODULE_LICENSE("GPL v2"); 432