drivers/media/radio/saa7706h.c

   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-chip-ident.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         unsigned muted;
 131 };
 132
 133 static inline struct saa7706h_state *to_state(struct v4l2_subdev *sd)
 134 {
 135         return container_of(sd, struct saa7706h_state, sd);
 136 }
 137
 138 static int saa7706h_i2c_send(struct i2c_client *client, const u8 *data, int len)
 139 {
 140         int err = i2c_master_send(client, data, len);
 141         if (err == len)
 142                 return 0;
 143         return err > 0 ? -EIO : err;
 144 }
 145
 146 static int saa7706h_i2c_transfer(struct i2c_client *client,
 147         struct i2c_msg *msgs, int num)
 148 {
 149         int err = i2c_transfer(client->adapter, msgs, num);
 150         if (err == num)
 151                 return 0;
 152         return err > 0 ? -EIO : err;
 153 }
 154
 155 static int saa7706h_set_reg24(struct v4l2_subdev *sd, u16 reg, u32 val)
 156 {
 157         struct i2c_client *client = v4l2_get_subdevdata(sd);
 158         u8 buf[5];
 159         int pos = 0;
 160
 161         buf[pos++] = reg >> 8;
 162         buf[pos++] = reg;
 163         buf[pos++] = val >> 16;
 164         buf[pos++] = val >> 8;
 165         buf[pos++] = val;
 166
 167         return saa7706h_i2c_send(client, buf, pos);
 168 }
 169
 170 static int saa7706h_set_reg24_err(struct v4l2_subdev *sd, u16 reg, u32 val,
 171         int *err)
 172 {
 173         return *err ? *err : saa7706h_set_reg24(sd, reg, val);
 174 }
 175
 176 static int saa7706h_set_reg16(struct v4l2_subdev *sd, u16 reg, u16 val)
 177 {
 178         struct i2c_client *client = v4l2_get_subdevdata(sd);
 179         u8 buf[4];
 180         int pos = 0;
 181
 182         buf[pos++] = reg >> 8;
 183         buf[pos++] = reg;
 184         buf[pos++] = val >> 8;
 185         buf[pos++] = val;
 186
 187         return saa7706h_i2c_send(client, buf, pos);
 188 }
 189
 190 static int saa7706h_set_reg16_err(struct v4l2_subdev *sd, u16 reg, u16 val,
 191         int *err)
 192 {
 193         return *err ? *err : saa7706h_set_reg16(sd, reg, val);
 194 }
 195
 196 static int saa7706h_get_reg16(struct v4l2_subdev *sd, u16 reg)
 197 {
 198         struct i2c_client *client = v4l2_get_subdevdata(sd);
 199         u8 buf[2];
 200         int err;
 201         u8 regaddr[] = {reg >> 8, reg};
 202         struct i2c_msg msg[] = { {client->addr, 0, sizeof(regaddr), regaddr},
 203                                 {client->addr, I2C_M_RD, sizeof(buf), buf} };
 204
 205         err = saa7706h_i2c_transfer(client, msg, ARRAY_SIZE(msg));
 206         if (err)
 207                 return err;
 208
 209         return buf[0] << 8 | buf[1];
 210 }
 211
 212 static int saa7706h_unmute(struct v4l2_subdev *sd)
 213 {
 214         struct saa7706h_state *state = to_state(sd);
 215         int err = 0;
 216
 217         err = saa7706h_set_reg16_err(sd, SAA7706H_REG_CTRL,
 218                 SAA7706H_CTRL_PLL3_62975MHZ | SAA7706H_CTRL_PC_RESET_DSP1 |
 219                 SAA7706H_CTRL_PC_RESET_DSP2, &err);
 220
 221         /* newer versions of the chip requires a small sleep after reset */
 222         msleep(1);
 223
 224         err = saa7706h_set_reg16_err(sd, SAA7706H_REG_CTRL,
 225                 SAA7706H_CTRL_PLL3_62975MHZ, &err);
 226
 227         err = saa7706h_set_reg24_err(sd, SAA7706H_REG_EVALUATION, 0, &err);
 228
 229         err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN1, 0x040022, &err);
 230
 231         err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN2,
 232                 SAA7706H_CL_GEN2_WSEDGE_FALLING, &err);
 233
 234         err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN4, 0x024080, &err);
 235
 236         err = saa7706h_set_reg24_err(sd, SAA7706H_REG_SEL, 0x200080, &err);
 237
 238         err = saa7706h_set_reg24_err(sd, SAA7706H_REG_IAC, 0xf4caed, &err);
 239
 240         err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CLK_SET, 0x124334, &err);
 241
 242         err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CLK_COEFF, 0x004a1a,
 243                 &err);
 244
 245         err = saa7706h_set_reg24_err(sd, SAA7706H_REG_INPUT_SENS, 0x0071c7,
 246                 &err);
 247
 248         err = saa7706h_set_reg24_err(sd, SAA7706H_REG_PHONE_NAV_AUDIO,
 249                 0x0e22ff, &err);
 250
 251         err = saa7706h_set_reg24_err(sd, SAA7706H_REG_IO_CONF_DSP2, 0x001ff8,
 252                 &err);
 253
 254         err = saa7706h_set_reg24_err(sd, SAA7706H_REG_STATUS_DSP2, 0x080003,
 255                 &err);
 256
 257         err = saa7706h_set_reg24_err(sd, SAA7706H_REG_PC_DSP2, 0x000004, &err);
 258
 259         err = saa7706h_set_reg16_err(sd, SAA7706H_DSP1_MOD0, 0x0c6c, &err);
 260
 261         err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_MPTR0, 0x000b4b, &err);
 262
 263         err = saa7706h_set_reg24_err(sd, SAA7706H_DSP1_MODPNTR, 0x000600, &err);
 264
 265         err = saa7706h_set_reg24_err(sd, SAA7706H_DSP1_MODPNTR, 0x0000c0, &err);
 266
 267         err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x000819,
 268                 &err);
 269
 270         err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x00085a,
 271                 &err);
 272
 273         err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_BUSAMP, 0x7fffff,
 274                 &err);
 275
 276         err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_FDACPNTR, 0x2000cb,
 277                 &err);
 278
 279         err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_IIS1PNTR, 0x2000cb,
 280                 &err);
 281
 282         err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVGA, 0x0f80, &err);
 283
 284         err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVAT1, 0x0800,
 285                 &err);
 286
 287         err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVAT, 0x0800, &err);
 288
 289         err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x000905,
 290                 &err);
 291         if (!err)
 292                 state->muted = 0;
 293         return err;
 294 }
 295
 296 static int saa7706h_mute(struct v4l2_subdev *sd)
 297 {
 298         struct saa7706h_state *state = to_state(sd);
 299         int err;
 300
 301         err = saa7706h_set_reg16(sd, SAA7706H_REG_CTRL,
 302                 SAA7706H_CTRL_PLL3_62975MHZ | SAA7706H_CTRL_PC_RESET_DSP1 |
 303                 SAA7706H_CTRL_PC_RESET_DSP2);
 304         if (!err)
 305                 state->muted = 1;
 306         return err;
 307 }
 308
 309 static int saa7706h_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
 310 {
 311         switch (qc->id) {
 312         case V4L2_CID_AUDIO_MUTE:
 313                 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
 314         }
 315         return -EINVAL;
 316 }
 317
 318 static int saa7706h_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 319 {
 320         struct saa7706h_state *state = to_state(sd);
 321
 322         switch (ctrl->id) {
 323         case V4L2_CID_AUDIO_MUTE:
 324                 ctrl->value = state->muted;
 325                 return 0;
 326         }
 327         return -EINVAL;
 328 }
 329
 330 static int saa7706h_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 331 {
 332         switch (ctrl->id) {
 333         case V4L2_CID_AUDIO_MUTE:
 334                 if (ctrl->value)
 335                         return saa7706h_mute(sd);
 336                 return saa7706h_unmute(sd);
 337         }
 338         return -EINVAL;
 339 }
 340
 341 static int saa7706h_g_chip_ident(struct v4l2_subdev *sd,
 342         struct v4l2_dbg_chip_ident *chip)
 343 {
 344         struct i2c_client *client = v4l2_get_subdevdata(sd);
 345
 346         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7706H, 0);
 347 }
 348
 349 static const struct v4l2_subdev_core_ops saa7706h_core_ops = {
 350         .g_chip_ident = saa7706h_g_chip_ident,
 351         .queryctrl = saa7706h_queryctrl,
 352         .g_ctrl = saa7706h_g_ctrl,
 353         .s_ctrl = saa7706h_s_ctrl,
 354 };
 355
 356 static const struct v4l2_subdev_ops saa7706h_ops = {
 357         .core = &saa7706h_core_ops,
 358 };
 359
 360 /*
 361  * Generic i2c probe
 362  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 363  */
 364
 365 static int __devinit saa7706h_probe(struct i2c_client *client,
 366                         const struct i2c_device_id *id)
 367 {
 368         struct saa7706h_state *state;
 369         struct v4l2_subdev *sd;
 370         int err;
 371
 372         /* Check if the adapter supports the needed features */
 373         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 374                 return -EIO;
 375
 376         v4l_info(client, "chip found @ 0x%02x (%s)\n",
 377                         client->addr << 1, client->adapter->name);
 378
 379         state = kmalloc(sizeof(struct saa7706h_state), GFP_KERNEL);
 380         if (state == NULL)
 381                 return -ENOMEM;
 382         sd = &state->sd;
 383         v4l2_i2c_subdev_init(sd, client, &saa7706h_ops);
 384
 385         /* check the rom versions */
 386         err = saa7706h_get_reg16(sd, SAA7706H_DSP1_ROM_VER);
 387         if (err < 0)
 388                 goto err;
 389         if (err != SUPPORTED_DSP1_ROM_VER)
 390                 v4l2_warn(sd, "Unknown DSP1 ROM code version: 0x%x\n", err);
 391
 392         state->muted = 1;
 393
 394         /* startup in a muted state */
 395         err = saa7706h_mute(sd);
 396         if (err)
 397                 goto err;
 398
 399         return 0;
 400
 401 err:
 402         v4l2_device_unregister_subdev(sd);
 403         kfree(to_state(sd));
 404
 405         printk(KERN_ERR DRIVER_NAME ": Failed to probe: %d\n", err);
 406
 407         return err;
 408 }
 409
 410 static int __devexit saa7706h_remove(struct i2c_client *client)
 411 {
 412         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 413
 414         saa7706h_mute(sd);
 415         v4l2_device_unregister_subdev(sd);
 416         kfree(to_state(sd));
 417         return 0;
 418 }
 419
 420 static const struct i2c_device_id saa7706h_id[] = {
 421         {DRIVER_NAME, 0},
 422         {},
 423 };
 424
 425 MODULE_DEVICE_TABLE(i2c, saa7706h_id);
 426
 427 static struct i2c_driver saa7706h_driver = {
 428         .driver = {
 429                 .owner  = THIS_MODULE,
 430                 .name   = DRIVER_NAME,
 431         },
 432         .probe          = saa7706h_probe,
 433         .remove         = saa7706h_remove,
 434         .id_table       = saa7706h_id,
 435 };
 436
 437 static __init int saa7706h_init(void)
 438 {
 439         return i2c_add_driver(&saa7706h_driver);
 440 }
 441
 442 static __exit void saa7706h_exit(void)
 443 {
 444         i2c_del_driver(&saa7706h_driver);
 445 }
 446
 447 module_init(saa7706h_init);
 448 module_exit(saa7706h_exit);
 449
 450 MODULE_DESCRIPTION("SAA7706H Car Radio DSP driver");
 451 MODULE_AUTHOR("Mocean Laboratories");
 452 MODULE_LICENSE("GPL v2");