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-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");