1 // SPDX-License-Identifier: GPL-2.0 2 // Rafael Micro R820T driver 3 // 4 // Copyright (C) 2013 Mauro Carvalho Chehab 5 // 6 // This driver was written from scratch, based on an existing driver 7 // that it is part of rtl-sdr git tree, released under GPLv2: 8 // https://groups.google.com/forum/#!topic/ultra-cheap-sdr/Y3rBEOFtHug 9 // https://github.com/n1gp/gr-baz 10 // 11 // From what I understood from the threads, the original driver was converted 12 // to userspace from a Realtek tree. I couldn't find the original tree. 13 // However, the original driver look awkward on my eyes. So, I decided to 14 // write a new version from it from the scratch, while trying to reproduce 15 // everything found there. 16 // 17 // TODO: 18 // After locking, the original driver seems to have some routines to 19 // improve reception. This was not implemented here yet. 20 // 21 // RF Gain set/get is not implemented. 22 23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 24 25 #include <linux/videodev2.h> 26 #include <linux/mutex.h> 27 #include <linux/slab.h> 28 #include <linux/bitrev.h> 29 30 #include "tuner-i2c.h" 31 #include "r820t.h" 32 33 /* 34 * FIXME: I think that there are only 32 registers, but better safe than 35 * sorry. After finishing the driver, we may review it. 36 */ 37 #define REG_SHADOW_START 5 38 #define NUM_REGS 27 39 #define NUM_IMR 5 40 #define IMR_TRIAL 9 41 42 #define VER_NUM 49 43 44 static int debug; 45 module_param(debug, int, 0644); 46 MODULE_PARM_DESC(debug, "enable verbose debug messages"); 47 48 static int no_imr_cal; 49 module_param(no_imr_cal, int, 0444); 50 MODULE_PARM_DESC(no_imr_cal, "Disable IMR calibration at module init"); 51 52 53 /* 54 * enums and structures 55 */ 56 57 enum xtal_cap_value { 58 XTAL_LOW_CAP_30P = 0, 59 XTAL_LOW_CAP_20P, 60 XTAL_LOW_CAP_10P, 61 XTAL_LOW_CAP_0P, 62 XTAL_HIGH_CAP_0P 63 }; 64 65 struct r820t_sect_type { 66 u8 phase_y; 67 u8 gain_x; 68 u16 value; 69 }; 70 71 struct r820t_priv { 72 struct list_head hybrid_tuner_instance_list; 73 const struct r820t_config *cfg; 74 struct tuner_i2c_props i2c_props; 75 struct mutex lock; 76 77 u8 regs[NUM_REGS]; 78 u8 buf[NUM_REGS + 1]; 79 enum xtal_cap_value xtal_cap_sel; 80 u16 pll; /* kHz */ 81 u32 int_freq; 82 u8 fil_cal_code; 83 bool imr_done; 84 bool has_lock; 85 bool init_done; 86 struct r820t_sect_type imr_data[NUM_IMR]; 87 88 /* Store current mode */ 89 u32 delsys; 90 enum v4l2_tuner_type type; 91 v4l2_std_id std; 92 u32 bw; /* in MHz */ 93 }; 94 95 struct r820t_freq_range { 96 u32 freq; 97 u8 open_d; 98 u8 rf_mux_ploy; 99 u8 tf_c; 100 u8 xtal_cap20p; 101 u8 xtal_cap10p; 102 u8 xtal_cap0p; 103 u8 imr_mem; /* Not used, currently */ 104 }; 105 106 #define VCO_POWER_REF 0x02 107 #define DIP_FREQ 32000000 108 109 /* 110 * Static constants 111 */ 112 113 static LIST_HEAD(hybrid_tuner_instance_list); 114 static DEFINE_MUTEX(r820t_list_mutex); 115 116 /* Those initial values start from REG_SHADOW_START */ 117 static const u8 r820t_init_array[NUM_REGS] = { 118 0x83, 0x32, 0x75, /* 05 to 07 */ 119 0xc0, 0x40, 0xd6, 0x6c, /* 08 to 0b */ 120 0xf5, 0x63, 0x75, 0x68, /* 0c to 0f */ 121 0x6c, 0x83, 0x80, 0x00, /* 10 to 13 */ 122 0x0f, 0x00, 0xc0, 0x30, /* 14 to 17 */ 123 0x48, 0xcc, 0x60, 0x00, /* 18 to 1b */ 124 0x54, 0xae, 0x4a, 0xc0 /* 1c to 1f */ 125 }; 126 127 /* Tuner frequency ranges */ 128 static const struct r820t_freq_range freq_ranges[] = { 129 { 130 .freq = 0, 131 .open_d = 0x08, /* low */ 132 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 133 .tf_c = 0xdf, /* R27[7:0] band2,band0 */ 134 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */ 135 .xtal_cap10p = 0x01, 136 .xtal_cap0p = 0x00, 137 .imr_mem = 0, 138 }, { 139 .freq = 50, /* Start freq, in MHz */ 140 .open_d = 0x08, /* low */ 141 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 142 .tf_c = 0xbe, /* R27[7:0] band4,band1 */ 143 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */ 144 .xtal_cap10p = 0x01, 145 .xtal_cap0p = 0x00, 146 .imr_mem = 0, 147 }, { 148 .freq = 55, /* Start freq, in MHz */ 149 .open_d = 0x08, /* low */ 150 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 151 .tf_c = 0x8b, /* R27[7:0] band7,band4 */ 152 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */ 153 .xtal_cap10p = 0x01, 154 .xtal_cap0p = 0x00, 155 .imr_mem = 0, 156 }, { 157 .freq = 60, /* Start freq, in MHz */ 158 .open_d = 0x08, /* low */ 159 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 160 .tf_c = 0x7b, /* R27[7:0] band8,band4 */ 161 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */ 162 .xtal_cap10p = 0x01, 163 .xtal_cap0p = 0x00, 164 .imr_mem = 0, 165 }, { 166 .freq = 65, /* Start freq, in MHz */ 167 .open_d = 0x08, /* low */ 168 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 169 .tf_c = 0x69, /* R27[7:0] band9,band6 */ 170 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */ 171 .xtal_cap10p = 0x01, 172 .xtal_cap0p = 0x00, 173 .imr_mem = 0, 174 }, { 175 .freq = 70, /* Start freq, in MHz */ 176 .open_d = 0x08, /* low */ 177 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 178 .tf_c = 0x58, /* R27[7:0] band10,band7 */ 179 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */ 180 .xtal_cap10p = 0x01, 181 .xtal_cap0p = 0x00, 182 .imr_mem = 0, 183 }, { 184 .freq = 75, /* Start freq, in MHz */ 185 .open_d = 0x00, /* high */ 186 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 187 .tf_c = 0x44, /* R27[7:0] band11,band11 */ 188 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */ 189 .xtal_cap10p = 0x01, 190 .xtal_cap0p = 0x00, 191 .imr_mem = 0, 192 }, { 193 .freq = 80, /* Start freq, in MHz */ 194 .open_d = 0x00, /* high */ 195 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 196 .tf_c = 0x44, /* R27[7:0] band11,band11 */ 197 .xtal_cap20p = 0x02, /* R16[1:0] 20pF (10) */ 198 .xtal_cap10p = 0x01, 199 .xtal_cap0p = 0x00, 200 .imr_mem = 0, 201 }, { 202 .freq = 90, /* Start freq, in MHz */ 203 .open_d = 0x00, /* high */ 204 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 205 .tf_c = 0x34, /* R27[7:0] band12,band11 */ 206 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */ 207 .xtal_cap10p = 0x01, 208 .xtal_cap0p = 0x00, 209 .imr_mem = 0, 210 }, { 211 .freq = 100, /* Start freq, in MHz */ 212 .open_d = 0x00, /* high */ 213 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 214 .tf_c = 0x34, /* R27[7:0] band12,band11 */ 215 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */ 216 .xtal_cap10p = 0x01, 217 .xtal_cap0p = 0x00, 218 .imr_mem = 0, 219 }, { 220 .freq = 110, /* Start freq, in MHz */ 221 .open_d = 0x00, /* high */ 222 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 223 .tf_c = 0x24, /* R27[7:0] band13,band11 */ 224 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */ 225 .xtal_cap10p = 0x01, 226 .xtal_cap0p = 0x00, 227 .imr_mem = 1, 228 }, { 229 .freq = 120, /* Start freq, in MHz */ 230 .open_d = 0x00, /* high */ 231 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 232 .tf_c = 0x24, /* R27[7:0] band13,band11 */ 233 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */ 234 .xtal_cap10p = 0x01, 235 .xtal_cap0p = 0x00, 236 .imr_mem = 1, 237 }, { 238 .freq = 140, /* Start freq, in MHz */ 239 .open_d = 0x00, /* high */ 240 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 241 .tf_c = 0x14, /* R27[7:0] band14,band11 */ 242 .xtal_cap20p = 0x01, /* R16[1:0] 10pF (01) */ 243 .xtal_cap10p = 0x01, 244 .xtal_cap0p = 0x00, 245 .imr_mem = 1, 246 }, { 247 .freq = 180, /* Start freq, in MHz */ 248 .open_d = 0x00, /* high */ 249 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 250 .tf_c = 0x13, /* R27[7:0] band14,band12 */ 251 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */ 252 .xtal_cap10p = 0x00, 253 .xtal_cap0p = 0x00, 254 .imr_mem = 1, 255 }, { 256 .freq = 220, /* Start freq, in MHz */ 257 .open_d = 0x00, /* high */ 258 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 259 .tf_c = 0x13, /* R27[7:0] band14,band12 */ 260 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */ 261 .xtal_cap10p = 0x00, 262 .xtal_cap0p = 0x00, 263 .imr_mem = 2, 264 }, { 265 .freq = 250, /* Start freq, in MHz */ 266 .open_d = 0x00, /* high */ 267 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 268 .tf_c = 0x11, /* R27[7:0] highest,highest */ 269 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */ 270 .xtal_cap10p = 0x00, 271 .xtal_cap0p = 0x00, 272 .imr_mem = 2, 273 }, { 274 .freq = 280, /* Start freq, in MHz */ 275 .open_d = 0x00, /* high */ 276 .rf_mux_ploy = 0x02, /* R26[7:6]=0 (LPF) R26[1:0]=2 (low) */ 277 .tf_c = 0x00, /* R27[7:0] highest,highest */ 278 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */ 279 .xtal_cap10p = 0x00, 280 .xtal_cap0p = 0x00, 281 .imr_mem = 2, 282 }, { 283 .freq = 310, /* Start freq, in MHz */ 284 .open_d = 0x00, /* high */ 285 .rf_mux_ploy = 0x41, /* R26[7:6]=1 (bypass) R26[1:0]=1 (middle) */ 286 .tf_c = 0x00, /* R27[7:0] highest,highest */ 287 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */ 288 .xtal_cap10p = 0x00, 289 .xtal_cap0p = 0x00, 290 .imr_mem = 2, 291 }, { 292 .freq = 450, /* Start freq, in MHz */ 293 .open_d = 0x00, /* high */ 294 .rf_mux_ploy = 0x41, /* R26[7:6]=1 (bypass) R26[1:0]=1 (middle) */ 295 .tf_c = 0x00, /* R27[7:0] highest,highest */ 296 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */ 297 .xtal_cap10p = 0x00, 298 .xtal_cap0p = 0x00, 299 .imr_mem = 3, 300 }, { 301 .freq = 588, /* Start freq, in MHz */ 302 .open_d = 0x00, /* high */ 303 .rf_mux_ploy = 0x40, /* R26[7:6]=1 (bypass) R26[1:0]=0 (highest) */ 304 .tf_c = 0x00, /* R27[7:0] highest,highest */ 305 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */ 306 .xtal_cap10p = 0x00, 307 .xtal_cap0p = 0x00, 308 .imr_mem = 3, 309 }, { 310 .freq = 650, /* Start freq, in MHz */ 311 .open_d = 0x00, /* high */ 312 .rf_mux_ploy = 0x40, /* R26[7:6]=1 (bypass) R26[1:0]=0 (highest) */ 313 .tf_c = 0x00, /* R27[7:0] highest,highest */ 314 .xtal_cap20p = 0x00, /* R16[1:0] 0pF (00) */ 315 .xtal_cap10p = 0x00, 316 .xtal_cap0p = 0x00, 317 .imr_mem = 4, 318 } 319 }; 320 321 static int r820t_xtal_capacitor[][2] = { 322 { 0x0b, XTAL_LOW_CAP_30P }, 323 { 0x02, XTAL_LOW_CAP_20P }, 324 { 0x01, XTAL_LOW_CAP_10P }, 325 { 0x00, XTAL_LOW_CAP_0P }, 326 { 0x10, XTAL_HIGH_CAP_0P }, 327 }; 328 r820t_chip_enum_to_str(enum r820t_chip chip)329 static const char *r820t_chip_enum_to_str(enum r820t_chip chip) 330 { 331 switch (chip) { 332 case CHIP_R820T: 333 return "R820T"; 334 case CHIP_R620D: 335 return "R620D"; 336 case CHIP_R828D: 337 return "R828D"; 338 case CHIP_R828: 339 return "R828"; 340 case CHIP_R828S: 341 return "R828S"; 342 case CHIP_R820C: 343 return "R820C"; 344 default: 345 return "<unknown>"; 346 } 347 } 348 349 /* 350 * I2C read/write code and shadow registers logic 351 */ shadow_store(struct r820t_priv * priv,u8 reg,const u8 * val,int len)352 static void shadow_store(struct r820t_priv *priv, u8 reg, const u8 *val, 353 int len) 354 { 355 int r = reg - REG_SHADOW_START; 356 357 if (r < 0) { 358 len += r; 359 r = 0; 360 } 361 if (len <= 0) 362 return; 363 if (len > NUM_REGS - r) 364 len = NUM_REGS - r; 365 366 tuner_dbg("%s: prev reg=%02x len=%d: %*ph\n", 367 __func__, r + REG_SHADOW_START, len, len, val); 368 369 memcpy(&priv->regs[r], val, len); 370 } 371 r820t_write(struct r820t_priv * priv,u8 reg,const u8 * val,int len)372 static int r820t_write(struct r820t_priv *priv, u8 reg, const u8 *val, 373 int len) 374 { 375 int rc, size, pos = 0; 376 377 /* Store the shadow registers */ 378 shadow_store(priv, reg, val, len); 379 380 do { 381 if (len > priv->cfg->max_i2c_msg_len - 1) 382 size = priv->cfg->max_i2c_msg_len - 1; 383 else 384 size = len; 385 386 /* Fill I2C buffer */ 387 priv->buf[0] = reg; 388 memcpy(&priv->buf[1], &val[pos], size); 389 390 rc = tuner_i2c_xfer_send(&priv->i2c_props, priv->buf, size + 1); 391 if (rc != size + 1) { 392 tuner_info("%s: i2c wr failed=%d reg=%02x len=%d: %*ph\n", 393 __func__, rc, reg, size, size, &priv->buf[1]); 394 if (rc < 0) 395 return rc; 396 return -EREMOTEIO; 397 } 398 tuner_dbg("%s: i2c wr reg=%02x len=%d: %*ph\n", 399 __func__, reg, size, size, &priv->buf[1]); 400 401 reg += size; 402 len -= size; 403 pos += size; 404 } while (len > 0); 405 406 return 0; 407 } 408 r820t_write_reg(struct r820t_priv * priv,u8 reg,u8 val)409 static inline int r820t_write_reg(struct r820t_priv *priv, u8 reg, u8 val) 410 { 411 u8 tmp = val; /* work around GCC PR81715 with asan-stack=1 */ 412 413 return r820t_write(priv, reg, &tmp, 1); 414 } 415 r820t_read_cache_reg(struct r820t_priv * priv,int reg)416 static int r820t_read_cache_reg(struct r820t_priv *priv, int reg) 417 { 418 reg -= REG_SHADOW_START; 419 420 if (reg >= 0 && reg < NUM_REGS) 421 return priv->regs[reg]; 422 else 423 return -EINVAL; 424 } 425 r820t_write_reg_mask(struct r820t_priv * priv,u8 reg,u8 val,u8 bit_mask)426 static inline int r820t_write_reg_mask(struct r820t_priv *priv, u8 reg, u8 val, 427 u8 bit_mask) 428 { 429 u8 tmp = val; 430 int rc = r820t_read_cache_reg(priv, reg); 431 432 if (rc < 0) 433 return rc; 434 435 tmp = (rc & ~bit_mask) | (tmp & bit_mask); 436 437 return r820t_write(priv, reg, &tmp, 1); 438 } 439 r820t_read(struct r820t_priv * priv,u8 reg,u8 * val,int len)440 static int r820t_read(struct r820t_priv *priv, u8 reg, u8 *val, int len) 441 { 442 int rc, i; 443 u8 *p = &priv->buf[1]; 444 445 priv->buf[0] = reg; 446 447 rc = tuner_i2c_xfer_send_recv(&priv->i2c_props, priv->buf, 1, p, len); 448 if (rc != len) { 449 tuner_info("%s: i2c rd failed=%d reg=%02x len=%d: %*ph\n", 450 __func__, rc, reg, len, len, p); 451 if (rc < 0) 452 return rc; 453 return -EREMOTEIO; 454 } 455 456 /* Copy data to the output buffer */ 457 for (i = 0; i < len; i++) 458 val[i] = bitrev8(p[i]); 459 460 tuner_dbg("%s: i2c rd reg=%02x len=%d: %*ph\n", 461 __func__, reg, len, len, val); 462 463 return 0; 464 } 465 466 /* 467 * r820t tuning logic 468 */ 469 r820t_set_mux(struct r820t_priv * priv,u32 freq)470 static int r820t_set_mux(struct r820t_priv *priv, u32 freq) 471 { 472 const struct r820t_freq_range *range; 473 int i, rc; 474 u8 val, reg08, reg09; 475 476 /* Get the proper frequency range */ 477 freq = freq / 1000000; 478 for (i = 0; i < ARRAY_SIZE(freq_ranges) - 1; i++) { 479 if (freq < freq_ranges[i + 1].freq) 480 break; 481 } 482 range = &freq_ranges[i]; 483 484 tuner_dbg("set r820t range#%d for frequency %d MHz\n", i, freq); 485 486 /* Open Drain */ 487 rc = r820t_write_reg_mask(priv, 0x17, range->open_d, 0x08); 488 if (rc < 0) 489 return rc; 490 491 /* RF_MUX,Polymux */ 492 rc = r820t_write_reg_mask(priv, 0x1a, range->rf_mux_ploy, 0xc3); 493 if (rc < 0) 494 return rc; 495 496 /* TF BAND */ 497 rc = r820t_write_reg(priv, 0x1b, range->tf_c); 498 if (rc < 0) 499 return rc; 500 501 /* XTAL CAP & Drive */ 502 switch (priv->xtal_cap_sel) { 503 case XTAL_LOW_CAP_30P: 504 case XTAL_LOW_CAP_20P: 505 val = range->xtal_cap20p | 0x08; 506 break; 507 case XTAL_LOW_CAP_10P: 508 val = range->xtal_cap10p | 0x08; 509 break; 510 case XTAL_HIGH_CAP_0P: 511 val = range->xtal_cap0p | 0x00; 512 break; 513 default: 514 case XTAL_LOW_CAP_0P: 515 val = range->xtal_cap0p | 0x08; 516 break; 517 } 518 rc = r820t_write_reg_mask(priv, 0x10, val, 0x0b); 519 if (rc < 0) 520 return rc; 521 522 if (priv->imr_done) { 523 reg08 = priv->imr_data[range->imr_mem].gain_x; 524 reg09 = priv->imr_data[range->imr_mem].phase_y; 525 } else { 526 reg08 = 0; 527 reg09 = 0; 528 } 529 rc = r820t_write_reg_mask(priv, 0x08, reg08, 0x3f); 530 if (rc < 0) 531 return rc; 532 533 rc = r820t_write_reg_mask(priv, 0x09, reg09, 0x3f); 534 535 return rc; 536 } 537 r820t_set_pll(struct r820t_priv * priv,enum v4l2_tuner_type type,u32 freq)538 static int r820t_set_pll(struct r820t_priv *priv, enum v4l2_tuner_type type, 539 u32 freq) 540 { 541 u32 vco_freq; 542 int rc, i; 543 unsigned sleep_time = 10000; 544 u32 vco_fra; /* VCO contribution by SDM (kHz) */ 545 u32 vco_min = 1770000; 546 u32 vco_max = vco_min * 2; 547 u32 pll_ref; 548 u16 n_sdm = 2; 549 u16 sdm = 0; 550 u8 mix_div = 2; 551 u8 div_buf = 0; 552 u8 div_num = 0; 553 u8 refdiv2 = 0; 554 u8 ni, si, nint, vco_fine_tune, val; 555 u8 data[5]; 556 557 /* Frequency in kHz */ 558 freq = freq / 1000; 559 pll_ref = priv->cfg->xtal / 1000; 560 561 #if 0 562 /* Doesn't exist on rtl-sdk, and on field tests, caused troubles */ 563 if ((priv->cfg->rafael_chip == CHIP_R620D) || 564 (priv->cfg->rafael_chip == CHIP_R828D) || 565 (priv->cfg->rafael_chip == CHIP_R828)) { 566 /* ref set refdiv2, reffreq = Xtal/2 on ATV application */ 567 if (type != V4L2_TUNER_DIGITAL_TV) { 568 pll_ref /= 2; 569 refdiv2 = 0x10; 570 sleep_time = 20000; 571 } 572 } else { 573 if (priv->cfg->xtal > 24000000) { 574 pll_ref /= 2; 575 refdiv2 = 0x10; 576 } 577 } 578 #endif 579 580 rc = r820t_write_reg_mask(priv, 0x10, refdiv2, 0x10); 581 if (rc < 0) 582 return rc; 583 584 /* set pll autotune = 128kHz */ 585 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x0c); 586 if (rc < 0) 587 return rc; 588 589 /* set VCO current = 100 */ 590 rc = r820t_write_reg_mask(priv, 0x12, 0x80, 0xe0); 591 if (rc < 0) 592 return rc; 593 594 /* Calculate divider */ 595 while (mix_div <= 64) { 596 if (((freq * mix_div) >= vco_min) && 597 ((freq * mix_div) < vco_max)) { 598 div_buf = mix_div; 599 while (div_buf > 2) { 600 div_buf = div_buf >> 1; 601 div_num++; 602 } 603 break; 604 } 605 mix_div = mix_div << 1; 606 } 607 608 rc = r820t_read(priv, 0x00, data, sizeof(data)); 609 if (rc < 0) 610 return rc; 611 612 vco_fine_tune = (data[4] & 0x30) >> 4; 613 614 tuner_dbg("mix_div=%d div_num=%d vco_fine_tune=%d\n", 615 mix_div, div_num, vco_fine_tune); 616 617 /* 618 * XXX: R828D/16MHz seems to have always vco_fine_tune=1. 619 * Due to that, this calculation goes wrong. 620 */ 621 if (priv->cfg->rafael_chip != CHIP_R828D) { 622 if (vco_fine_tune > VCO_POWER_REF) 623 div_num = div_num - 1; 624 else if (vco_fine_tune < VCO_POWER_REF) 625 div_num = div_num + 1; 626 } 627 628 rc = r820t_write_reg_mask(priv, 0x10, div_num << 5, 0xe0); 629 if (rc < 0) 630 return rc; 631 632 vco_freq = freq * mix_div; 633 nint = vco_freq / (2 * pll_ref); 634 vco_fra = vco_freq - 2 * pll_ref * nint; 635 636 /* boundary spur prevention */ 637 if (vco_fra < pll_ref / 64) { 638 vco_fra = 0; 639 } else if (vco_fra > pll_ref * 127 / 64) { 640 vco_fra = 0; 641 nint++; 642 } else if ((vco_fra > pll_ref * 127 / 128) && (vco_fra < pll_ref)) { 643 vco_fra = pll_ref * 127 / 128; 644 } else if ((vco_fra > pll_ref) && (vco_fra < pll_ref * 129 / 128)) { 645 vco_fra = pll_ref * 129 / 128; 646 } 647 648 ni = (nint - 13) / 4; 649 si = nint - 4 * ni - 13; 650 651 rc = r820t_write_reg(priv, 0x14, ni + (si << 6)); 652 if (rc < 0) 653 return rc; 654 655 /* pw_sdm */ 656 if (!vco_fra) 657 val = 0x08; 658 else 659 val = 0x00; 660 661 rc = r820t_write_reg_mask(priv, 0x12, val, 0x08); 662 if (rc < 0) 663 return rc; 664 665 /* sdm calculator */ 666 while (vco_fra > 1) { 667 if (vco_fra > (2 * pll_ref / n_sdm)) { 668 sdm = sdm + 32768 / (n_sdm / 2); 669 vco_fra = vco_fra - 2 * pll_ref / n_sdm; 670 if (n_sdm >= 0x8000) 671 break; 672 } 673 n_sdm = n_sdm << 1; 674 } 675 676 tuner_dbg("freq %d kHz, pll ref %d%s, sdm=0x%04x\n", 677 freq, pll_ref, refdiv2 ? " / 2" : "", sdm); 678 679 rc = r820t_write_reg(priv, 0x16, sdm >> 8); 680 if (rc < 0) 681 return rc; 682 rc = r820t_write_reg(priv, 0x15, sdm & 0xff); 683 if (rc < 0) 684 return rc; 685 686 for (i = 0; i < 2; i++) { 687 usleep_range(sleep_time, sleep_time + 1000); 688 689 /* Check if PLL has locked */ 690 rc = r820t_read(priv, 0x00, data, 3); 691 if (rc < 0) 692 return rc; 693 if (data[2] & 0x40) 694 break; 695 696 if (!i) { 697 /* Didn't lock. Increase VCO current */ 698 rc = r820t_write_reg_mask(priv, 0x12, 0x60, 0xe0); 699 if (rc < 0) 700 return rc; 701 } 702 } 703 704 if (!(data[2] & 0x40)) { 705 priv->has_lock = false; 706 return 0; 707 } 708 709 priv->has_lock = true; 710 tuner_dbg("tuner has lock at frequency %d kHz\n", freq); 711 712 /* set pll autotune = 8kHz */ 713 rc = r820t_write_reg_mask(priv, 0x1a, 0x08, 0x08); 714 715 return rc; 716 } 717 r820t_sysfreq_sel(struct r820t_priv * priv,u32 freq,enum v4l2_tuner_type type,v4l2_std_id std,u32 delsys)718 static int r820t_sysfreq_sel(struct r820t_priv *priv, u32 freq, 719 enum v4l2_tuner_type type, 720 v4l2_std_id std, 721 u32 delsys) 722 { 723 int rc; 724 u8 mixer_top, lna_top, cp_cur, div_buf_cur, lna_vth_l, mixer_vth_l; 725 u8 air_cable1_in, cable2_in, pre_dect, lna_discharge, filter_cur; 726 727 tuner_dbg("adjusting tuner parameters for the standard\n"); 728 729 switch (delsys) { 730 case SYS_DVBT: 731 if ((freq == 506000000) || (freq == 666000000) || 732 (freq == 818000000)) { 733 mixer_top = 0x14; /* mixer top:14 , top-1, low-discharge */ 734 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */ 735 cp_cur = 0x28; /* 101, 0.2 */ 736 div_buf_cur = 0x20; /* 10, 200u */ 737 } else { 738 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */ 739 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */ 740 cp_cur = 0x38; /* 111, auto */ 741 div_buf_cur = 0x30; /* 11, 150u */ 742 } 743 lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */ 744 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */ 745 air_cable1_in = 0x00; 746 cable2_in = 0x00; 747 pre_dect = 0x40; 748 lna_discharge = 14; 749 filter_cur = 0x40; /* 10, low */ 750 break; 751 case SYS_DVBT2: 752 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */ 753 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */ 754 lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */ 755 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */ 756 air_cable1_in = 0x00; 757 cable2_in = 0x00; 758 pre_dect = 0x40; 759 lna_discharge = 14; 760 cp_cur = 0x38; /* 111, auto */ 761 div_buf_cur = 0x30; /* 11, 150u */ 762 filter_cur = 0x40; /* 10, low */ 763 break; 764 case SYS_ISDBT: 765 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */ 766 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */ 767 lna_vth_l = 0x75; /* lna vth 1.04 , vtl 0.84 */ 768 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */ 769 air_cable1_in = 0x00; 770 cable2_in = 0x00; 771 pre_dect = 0x40; 772 lna_discharge = 14; 773 cp_cur = 0x38; /* 111, auto */ 774 div_buf_cur = 0x30; /* 11, 150u */ 775 filter_cur = 0x40; /* 10, low */ 776 break; 777 case SYS_DVBC_ANNEX_A: 778 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */ 779 lna_top = 0xe5; 780 lna_vth_l = 0x62; 781 mixer_vth_l = 0x75; 782 air_cable1_in = 0x60; 783 cable2_in = 0x00; 784 pre_dect = 0x40; 785 lna_discharge = 14; 786 cp_cur = 0x38; /* 111, auto */ 787 div_buf_cur = 0x30; /* 11, 150u */ 788 filter_cur = 0x40; /* 10, low */ 789 break; 790 default: /* DVB-T 8M */ 791 mixer_top = 0x24; /* mixer top:13 , top-1, low-discharge */ 792 lna_top = 0xe5; /* detect bw 3, lna top:4, predet top:2 */ 793 lna_vth_l = 0x53; /* lna vth 0.84 , vtl 0.64 */ 794 mixer_vth_l = 0x75; /* mixer vth 1.04, vtl 0.84 */ 795 air_cable1_in = 0x00; 796 cable2_in = 0x00; 797 pre_dect = 0x40; 798 lna_discharge = 14; 799 cp_cur = 0x38; /* 111, auto */ 800 div_buf_cur = 0x30; /* 11, 150u */ 801 filter_cur = 0x40; /* 10, low */ 802 break; 803 } 804 805 if (priv->cfg->use_diplexer && 806 ((priv->cfg->rafael_chip == CHIP_R820T) || 807 (priv->cfg->rafael_chip == CHIP_R828S) || 808 (priv->cfg->rafael_chip == CHIP_R820C))) { 809 if (freq > DIP_FREQ) 810 air_cable1_in = 0x00; 811 else 812 air_cable1_in = 0x60; 813 cable2_in = 0x00; 814 } 815 816 817 if (priv->cfg->use_predetect) { 818 rc = r820t_write_reg_mask(priv, 0x06, pre_dect, 0x40); 819 if (rc < 0) 820 return rc; 821 } 822 823 rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0xc7); 824 if (rc < 0) 825 return rc; 826 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0xf8); 827 if (rc < 0) 828 return rc; 829 rc = r820t_write_reg(priv, 0x0d, lna_vth_l); 830 if (rc < 0) 831 return rc; 832 rc = r820t_write_reg(priv, 0x0e, mixer_vth_l); 833 if (rc < 0) 834 return rc; 835 836 /* Air-IN only for Astrometa */ 837 rc = r820t_write_reg_mask(priv, 0x05, air_cable1_in, 0x60); 838 if (rc < 0) 839 return rc; 840 rc = r820t_write_reg_mask(priv, 0x06, cable2_in, 0x08); 841 if (rc < 0) 842 return rc; 843 844 rc = r820t_write_reg_mask(priv, 0x11, cp_cur, 0x38); 845 if (rc < 0) 846 return rc; 847 rc = r820t_write_reg_mask(priv, 0x17, div_buf_cur, 0x30); 848 if (rc < 0) 849 return rc; 850 rc = r820t_write_reg_mask(priv, 0x0a, filter_cur, 0x60); 851 if (rc < 0) 852 return rc; 853 /* 854 * Original driver initializes regs 0x05 and 0x06 with the 855 * same value again on this point. Probably, it is just an 856 * error there 857 */ 858 859 /* 860 * Set LNA 861 */ 862 863 tuner_dbg("adjusting LNA parameters\n"); 864 if (type != V4L2_TUNER_ANALOG_TV) { 865 /* LNA TOP: lowest */ 866 rc = r820t_write_reg_mask(priv, 0x1d, 0, 0x38); 867 if (rc < 0) 868 return rc; 869 870 /* 0: normal mode */ 871 rc = r820t_write_reg_mask(priv, 0x1c, 0, 0x04); 872 if (rc < 0) 873 return rc; 874 875 /* 0: PRE_DECT off */ 876 rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40); 877 if (rc < 0) 878 return rc; 879 880 /* agc clk 250hz */ 881 rc = r820t_write_reg_mask(priv, 0x1a, 0x30, 0x30); 882 if (rc < 0) 883 return rc; 884 885 msleep(250); 886 887 /* write LNA TOP = 3 */ 888 rc = r820t_write_reg_mask(priv, 0x1d, 0x18, 0x38); 889 if (rc < 0) 890 return rc; 891 892 /* 893 * write discharge mode 894 * FIXME: IMHO, the mask here is wrong, but it matches 895 * what's there at the original driver 896 */ 897 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04); 898 if (rc < 0) 899 return rc; 900 901 /* LNA discharge current */ 902 rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f); 903 if (rc < 0) 904 return rc; 905 906 /* agc clk 60hz */ 907 rc = r820t_write_reg_mask(priv, 0x1a, 0x20, 0x30); 908 if (rc < 0) 909 return rc; 910 } else { 911 /* PRE_DECT off */ 912 rc = r820t_write_reg_mask(priv, 0x06, 0, 0x40); 913 if (rc < 0) 914 return rc; 915 916 /* write LNA TOP */ 917 rc = r820t_write_reg_mask(priv, 0x1d, lna_top, 0x38); 918 if (rc < 0) 919 return rc; 920 921 /* 922 * write discharge mode 923 * FIXME: IMHO, the mask here is wrong, but it matches 924 * what's there at the original driver 925 */ 926 rc = r820t_write_reg_mask(priv, 0x1c, mixer_top, 0x04); 927 if (rc < 0) 928 return rc; 929 930 /* LNA discharge current */ 931 rc = r820t_write_reg_mask(priv, 0x1e, lna_discharge, 0x1f); 932 if (rc < 0) 933 return rc; 934 935 /* agc clk 1Khz, external det1 cap 1u */ 936 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x30); 937 if (rc < 0) 938 return rc; 939 940 rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x04); 941 if (rc < 0) 942 return rc; 943 } 944 return 0; 945 } 946 r820t_set_tv_standard(struct r820t_priv * priv,unsigned bw,enum v4l2_tuner_type type,v4l2_std_id std,u32 delsys)947 static int r820t_set_tv_standard(struct r820t_priv *priv, 948 unsigned bw, 949 enum v4l2_tuner_type type, 950 v4l2_std_id std, u32 delsys) 951 952 { 953 int rc, i; 954 u32 if_khz, filt_cal_lo; 955 u8 data[5], val; 956 u8 filt_gain, img_r, filt_q, hp_cor, ext_enable, loop_through; 957 u8 lt_att, flt_ext_widest, polyfil_cur; 958 bool need_calibration; 959 960 tuner_dbg("selecting the delivery system\n"); 961 962 if (delsys == SYS_ISDBT) { 963 if_khz = 4063; 964 filt_cal_lo = 59000; 965 filt_gain = 0x10; /* +3db, 6mhz on */ 966 img_r = 0x00; /* image negative */ 967 filt_q = 0x10; /* r10[4]:low q(1'b1) */ 968 hp_cor = 0x6a; /* 1.7m disable, +2cap, 1.25mhz */ 969 ext_enable = 0x40; /* r30[6], ext enable; r30[5]:0 ext at lna max */ 970 loop_through = 0x00; /* r5[7], lt on */ 971 lt_att = 0x00; /* r31[7], lt att enable */ 972 flt_ext_widest = 0x80; /* r15[7]: flt_ext_wide on */ 973 polyfil_cur = 0x60; /* r25[6:5]:min */ 974 } else if (delsys == SYS_DVBC_ANNEX_A) { 975 if_khz = 5070; 976 filt_cal_lo = 73500; 977 filt_gain = 0x10; /* +3db, 6mhz on */ 978 img_r = 0x00; /* image negative */ 979 filt_q = 0x10; /* r10[4]:low q(1'b1) */ 980 hp_cor = 0x0b; /* 1.7m disable, +0cap, 1.0mhz */ 981 ext_enable = 0x40; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */ 982 loop_through = 0x00; /* r5[7], lt on */ 983 lt_att = 0x00; /* r31[7], lt att enable */ 984 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */ 985 polyfil_cur = 0x60; /* r25[6:5]:min */ 986 } else if (delsys == SYS_DVBC_ANNEX_C) { 987 if_khz = 4063; 988 filt_cal_lo = 55000; 989 filt_gain = 0x10; /* +3db, 6mhz on */ 990 img_r = 0x00; /* image negative */ 991 filt_q = 0x10; /* r10[4]:low q(1'b1) */ 992 hp_cor = 0x6a; /* 1.7m disable, +0cap, 1.0mhz */ 993 ext_enable = 0x40; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */ 994 loop_through = 0x00; /* r5[7], lt on */ 995 lt_att = 0x00; /* r31[7], lt att enable */ 996 flt_ext_widest = 0x80; /* r15[7]: flt_ext_wide on */ 997 polyfil_cur = 0x60; /* r25[6:5]:min */ 998 } else { 999 if (bw <= 6) { 1000 if_khz = 3570; 1001 filt_cal_lo = 56000; /* 52000->56000 */ 1002 filt_gain = 0x10; /* +3db, 6mhz on */ 1003 img_r = 0x00; /* image negative */ 1004 filt_q = 0x10; /* r10[4]:low q(1'b1) */ 1005 hp_cor = 0x6b; /* 1.7m disable, +2cap, 1.0mhz */ 1006 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */ 1007 loop_through = 0x00; /* r5[7], lt on */ 1008 lt_att = 0x00; /* r31[7], lt att enable */ 1009 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */ 1010 polyfil_cur = 0x60; /* r25[6:5]:min */ 1011 } else if (bw == 7) { 1012 #if 0 1013 /* 1014 * There are two 7 MHz tables defined on the original 1015 * driver, but just the second one seems to be visible 1016 * by rtl2832. Keep this one here commented, as it 1017 * might be needed in the future 1018 */ 1019 1020 if_khz = 4070; 1021 filt_cal_lo = 60000; 1022 filt_gain = 0x10; /* +3db, 6mhz on */ 1023 img_r = 0x00; /* image negative */ 1024 filt_q = 0x10; /* r10[4]:low q(1'b1) */ 1025 hp_cor = 0x2b; /* 1.7m disable, +1cap, 1.0mhz */ 1026 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */ 1027 loop_through = 0x00; /* r5[7], lt on */ 1028 lt_att = 0x00; /* r31[7], lt att enable */ 1029 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */ 1030 polyfil_cur = 0x60; /* r25[6:5]:min */ 1031 #endif 1032 /* 7 MHz, second table */ 1033 if_khz = 4570; 1034 filt_cal_lo = 63000; 1035 filt_gain = 0x10; /* +3db, 6mhz on */ 1036 img_r = 0x00; /* image negative */ 1037 filt_q = 0x10; /* r10[4]:low q(1'b1) */ 1038 hp_cor = 0x2a; /* 1.7m disable, +1cap, 1.25mhz */ 1039 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */ 1040 loop_through = 0x00; /* r5[7], lt on */ 1041 lt_att = 0x00; /* r31[7], lt att enable */ 1042 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */ 1043 polyfil_cur = 0x60; /* r25[6:5]:min */ 1044 } else { 1045 if_khz = 4570; 1046 filt_cal_lo = 68500; 1047 filt_gain = 0x10; /* +3db, 6mhz on */ 1048 img_r = 0x00; /* image negative */ 1049 filt_q = 0x10; /* r10[4]:low q(1'b1) */ 1050 hp_cor = 0x0b; /* 1.7m disable, +0cap, 1.0mhz */ 1051 ext_enable = 0x60; /* r30[6]=1 ext enable; r30[5]:1 ext at lna max-1 */ 1052 loop_through = 0x00; /* r5[7], lt on */ 1053 lt_att = 0x00; /* r31[7], lt att enable */ 1054 flt_ext_widest = 0x00; /* r15[7]: flt_ext_wide off */ 1055 polyfil_cur = 0x60; /* r25[6:5]:min */ 1056 } 1057 } 1058 1059 /* Initialize the shadow registers */ 1060 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array)); 1061 1062 /* Init Flag & Xtal_check Result */ 1063 if (priv->imr_done) 1064 val = 1 | priv->xtal_cap_sel << 1; 1065 else 1066 val = 0; 1067 rc = r820t_write_reg_mask(priv, 0x0c, val, 0x0f); 1068 if (rc < 0) 1069 return rc; 1070 1071 /* version */ 1072 rc = r820t_write_reg_mask(priv, 0x13, VER_NUM, 0x3f); 1073 if (rc < 0) 1074 return rc; 1075 1076 /* for LT Gain test */ 1077 if (type != V4L2_TUNER_ANALOG_TV) { 1078 rc = r820t_write_reg_mask(priv, 0x1d, 0x00, 0x38); 1079 if (rc < 0) 1080 return rc; 1081 usleep_range(1000, 2000); 1082 } 1083 priv->int_freq = if_khz * 1000; 1084 1085 /* Check if standard changed. If so, filter calibration is needed */ 1086 if (type != priv->type) 1087 need_calibration = true; 1088 else if ((type == V4L2_TUNER_ANALOG_TV) && (std != priv->std)) 1089 need_calibration = true; 1090 else if ((type == V4L2_TUNER_DIGITAL_TV) && 1091 ((delsys != priv->delsys) || bw != priv->bw)) 1092 need_calibration = true; 1093 else 1094 need_calibration = false; 1095 1096 if (need_calibration) { 1097 tuner_dbg("calibrating the tuner\n"); 1098 for (i = 0; i < 2; i++) { 1099 /* Set filt_cap */ 1100 rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0x60); 1101 if (rc < 0) 1102 return rc; 1103 1104 /* set cali clk =on */ 1105 rc = r820t_write_reg_mask(priv, 0x0f, 0x04, 0x04); 1106 if (rc < 0) 1107 return rc; 1108 1109 /* X'tal cap 0pF for PLL */ 1110 rc = r820t_write_reg_mask(priv, 0x10, 0x00, 0x03); 1111 if (rc < 0) 1112 return rc; 1113 1114 rc = r820t_set_pll(priv, type, filt_cal_lo * 1000); 1115 if (rc < 0 || !priv->has_lock) 1116 return rc; 1117 1118 /* Start Trigger */ 1119 rc = r820t_write_reg_mask(priv, 0x0b, 0x10, 0x10); 1120 if (rc < 0) 1121 return rc; 1122 1123 usleep_range(1000, 2000); 1124 1125 /* Stop Trigger */ 1126 rc = r820t_write_reg_mask(priv, 0x0b, 0x00, 0x10); 1127 if (rc < 0) 1128 return rc; 1129 1130 /* set cali clk =off */ 1131 rc = r820t_write_reg_mask(priv, 0x0f, 0x00, 0x04); 1132 if (rc < 0) 1133 return rc; 1134 1135 /* Check if calibration worked */ 1136 rc = r820t_read(priv, 0x00, data, sizeof(data)); 1137 if (rc < 0) 1138 return rc; 1139 1140 priv->fil_cal_code = data[4] & 0x0f; 1141 if (priv->fil_cal_code && priv->fil_cal_code != 0x0f) 1142 break; 1143 } 1144 /* narrowest */ 1145 if (priv->fil_cal_code == 0x0f) 1146 priv->fil_cal_code = 0; 1147 } 1148 1149 rc = r820t_write_reg_mask(priv, 0x0a, 1150 filt_q | priv->fil_cal_code, 0x1f); 1151 if (rc < 0) 1152 return rc; 1153 1154 /* Set BW, Filter_gain, & HP corner */ 1155 rc = r820t_write_reg_mask(priv, 0x0b, hp_cor, 0xef); 1156 if (rc < 0) 1157 return rc; 1158 1159 1160 /* Set Img_R */ 1161 rc = r820t_write_reg_mask(priv, 0x07, img_r, 0x80); 1162 if (rc < 0) 1163 return rc; 1164 1165 /* Set filt_3dB, V6MHz */ 1166 rc = r820t_write_reg_mask(priv, 0x06, filt_gain, 0x30); 1167 if (rc < 0) 1168 return rc; 1169 1170 /* channel filter extension */ 1171 rc = r820t_write_reg_mask(priv, 0x1e, ext_enable, 0x60); 1172 if (rc < 0) 1173 return rc; 1174 1175 /* Loop through */ 1176 rc = r820t_write_reg_mask(priv, 0x05, loop_through, 0x80); 1177 if (rc < 0) 1178 return rc; 1179 1180 /* Loop through attenuation */ 1181 rc = r820t_write_reg_mask(priv, 0x1f, lt_att, 0x80); 1182 if (rc < 0) 1183 return rc; 1184 1185 /* filter extension widest */ 1186 rc = r820t_write_reg_mask(priv, 0x0f, flt_ext_widest, 0x80); 1187 if (rc < 0) 1188 return rc; 1189 1190 /* RF poly filter current */ 1191 rc = r820t_write_reg_mask(priv, 0x19, polyfil_cur, 0x60); 1192 if (rc < 0) 1193 return rc; 1194 1195 /* Store current standard. If it changes, re-calibrate the tuner */ 1196 priv->delsys = delsys; 1197 priv->type = type; 1198 priv->std = std; 1199 priv->bw = bw; 1200 1201 return 0; 1202 } 1203 r820t_read_gain(struct r820t_priv * priv)1204 static int r820t_read_gain(struct r820t_priv *priv) 1205 { 1206 u8 data[4]; 1207 int rc; 1208 1209 rc = r820t_read(priv, 0x00, data, sizeof(data)); 1210 if (rc < 0) 1211 return rc; 1212 1213 return ((data[3] & 0x08) << 1) + ((data[3] & 0xf0) >> 4); 1214 } 1215 1216 #if 0 1217 /* FIXME: This routine requires more testing */ 1218 1219 /* 1220 * measured with a Racal 6103E GSM test set at 928 MHz with -60 dBm 1221 * input power, for raw results see: 1222 * http://steve-m.de/projects/rtl-sdr/gain_measurement/r820t/ 1223 */ 1224 1225 static const int r820t_lna_gain_steps[] = { 1226 0, 9, 13, 40, 38, 13, 31, 22, 26, 31, 26, 14, 19, 5, 35, 13 1227 }; 1228 1229 static const int r820t_mixer_gain_steps[] = { 1230 0, 5, 10, 10, 19, 9, 10, 25, 17, 10, 8, 16, 13, 6, 3, -8 1231 }; 1232 1233 static int r820t_set_gain_mode(struct r820t_priv *priv, 1234 bool set_manual_gain, 1235 int gain) 1236 { 1237 int rc; 1238 1239 if (set_manual_gain) { 1240 int i, total_gain = 0; 1241 uint8_t mix_index = 0, lna_index = 0; 1242 u8 data[4]; 1243 1244 /* LNA auto off */ 1245 rc = r820t_write_reg_mask(priv, 0x05, 0x10, 0x10); 1246 if (rc < 0) 1247 return rc; 1248 1249 /* Mixer auto off */ 1250 rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10); 1251 if (rc < 0) 1252 return rc; 1253 1254 rc = r820t_read(priv, 0x00, data, sizeof(data)); 1255 if (rc < 0) 1256 return rc; 1257 1258 /* set fixed VGA gain for now (16.3 dB) */ 1259 rc = r820t_write_reg_mask(priv, 0x0c, 0x08, 0x9f); 1260 if (rc < 0) 1261 return rc; 1262 1263 for (i = 0; i < 15; i++) { 1264 if (total_gain >= gain) 1265 break; 1266 1267 total_gain += r820t_lna_gain_steps[++lna_index]; 1268 1269 if (total_gain >= gain) 1270 break; 1271 1272 total_gain += r820t_mixer_gain_steps[++mix_index]; 1273 } 1274 1275 /* set LNA gain */ 1276 rc = r820t_write_reg_mask(priv, 0x05, lna_index, 0x0f); 1277 if (rc < 0) 1278 return rc; 1279 1280 /* set Mixer gain */ 1281 rc = r820t_write_reg_mask(priv, 0x07, mix_index, 0x0f); 1282 if (rc < 0) 1283 return rc; 1284 } else { 1285 /* LNA */ 1286 rc = r820t_write_reg_mask(priv, 0x05, 0, 0x10); 1287 if (rc < 0) 1288 return rc; 1289 1290 /* Mixer */ 1291 rc = r820t_write_reg_mask(priv, 0x07, 0x10, 0x10); 1292 if (rc < 0) 1293 return rc; 1294 1295 /* set fixed VGA gain for now (26.5 dB) */ 1296 rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f); 1297 if (rc < 0) 1298 return rc; 1299 } 1300 1301 return 0; 1302 } 1303 #endif 1304 generic_set_freq(struct dvb_frontend * fe,u32 freq,unsigned bw,enum v4l2_tuner_type type,v4l2_std_id std,u32 delsys)1305 static int generic_set_freq(struct dvb_frontend *fe, 1306 u32 freq /* in HZ */, 1307 unsigned bw, 1308 enum v4l2_tuner_type type, 1309 v4l2_std_id std, u32 delsys) 1310 { 1311 struct r820t_priv *priv = fe->tuner_priv; 1312 int rc; 1313 u32 lo_freq; 1314 1315 tuner_dbg("should set frequency to %d kHz, bw %d MHz\n", 1316 freq / 1000, bw); 1317 1318 rc = r820t_set_tv_standard(priv, bw, type, std, delsys); 1319 if (rc < 0) 1320 goto err; 1321 1322 if ((type == V4L2_TUNER_ANALOG_TV) && (std == V4L2_STD_SECAM_LC)) 1323 lo_freq = freq - priv->int_freq; 1324 else 1325 lo_freq = freq + priv->int_freq; 1326 1327 rc = r820t_set_mux(priv, lo_freq); 1328 if (rc < 0) 1329 goto err; 1330 1331 rc = r820t_set_pll(priv, type, lo_freq); 1332 if (rc < 0 || !priv->has_lock) 1333 goto err; 1334 1335 rc = r820t_sysfreq_sel(priv, freq, type, std, delsys); 1336 if (rc < 0) 1337 goto err; 1338 1339 tuner_dbg("%s: PLL locked on frequency %d Hz, gain=%d\n", 1340 __func__, freq, r820t_read_gain(priv)); 1341 1342 err: 1343 1344 if (rc < 0) 1345 tuner_dbg("%s: failed=%d\n", __func__, rc); 1346 return rc; 1347 } 1348 1349 /* 1350 * r820t standby logic 1351 */ 1352 r820t_standby(struct r820t_priv * priv)1353 static int r820t_standby(struct r820t_priv *priv) 1354 { 1355 int rc; 1356 1357 /* If device was not initialized yet, don't need to standby */ 1358 if (!priv->init_done) 1359 return 0; 1360 1361 rc = r820t_write_reg(priv, 0x06, 0xb1); 1362 if (rc < 0) 1363 return rc; 1364 rc = r820t_write_reg(priv, 0x05, 0x03); 1365 if (rc < 0) 1366 return rc; 1367 rc = r820t_write_reg(priv, 0x07, 0x3a); 1368 if (rc < 0) 1369 return rc; 1370 rc = r820t_write_reg(priv, 0x08, 0x40); 1371 if (rc < 0) 1372 return rc; 1373 rc = r820t_write_reg(priv, 0x09, 0xc0); 1374 if (rc < 0) 1375 return rc; 1376 rc = r820t_write_reg(priv, 0x0a, 0x36); 1377 if (rc < 0) 1378 return rc; 1379 rc = r820t_write_reg(priv, 0x0c, 0x35); 1380 if (rc < 0) 1381 return rc; 1382 rc = r820t_write_reg(priv, 0x0f, 0x68); 1383 if (rc < 0) 1384 return rc; 1385 rc = r820t_write_reg(priv, 0x11, 0x03); 1386 if (rc < 0) 1387 return rc; 1388 rc = r820t_write_reg(priv, 0x17, 0xf4); 1389 if (rc < 0) 1390 return rc; 1391 rc = r820t_write_reg(priv, 0x19, 0x0c); 1392 1393 /* Force initial calibration */ 1394 priv->type = -1; 1395 1396 return rc; 1397 } 1398 1399 /* 1400 * r820t device init logic 1401 */ 1402 r820t_xtal_check(struct r820t_priv * priv)1403 static int r820t_xtal_check(struct r820t_priv *priv) 1404 { 1405 int rc, i; 1406 u8 data[3], val; 1407 1408 /* Initialize the shadow registers */ 1409 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array)); 1410 1411 /* cap 30pF & Drive Low */ 1412 rc = r820t_write_reg_mask(priv, 0x10, 0x0b, 0x0b); 1413 if (rc < 0) 1414 return rc; 1415 1416 /* set pll autotune = 128kHz */ 1417 rc = r820t_write_reg_mask(priv, 0x1a, 0x00, 0x0c); 1418 if (rc < 0) 1419 return rc; 1420 1421 /* set manual initial reg = 111111; */ 1422 rc = r820t_write_reg_mask(priv, 0x13, 0x7f, 0x7f); 1423 if (rc < 0) 1424 return rc; 1425 1426 /* set auto */ 1427 rc = r820t_write_reg_mask(priv, 0x13, 0x00, 0x40); 1428 if (rc < 0) 1429 return rc; 1430 1431 /* Try several xtal capacitor alternatives */ 1432 for (i = 0; i < ARRAY_SIZE(r820t_xtal_capacitor); i++) { 1433 rc = r820t_write_reg_mask(priv, 0x10, 1434 r820t_xtal_capacitor[i][0], 0x1b); 1435 if (rc < 0) 1436 return rc; 1437 1438 usleep_range(5000, 6000); 1439 1440 rc = r820t_read(priv, 0x00, data, sizeof(data)); 1441 if (rc < 0) 1442 return rc; 1443 if (!(data[2] & 0x40)) 1444 continue; 1445 1446 val = data[2] & 0x3f; 1447 1448 if (priv->cfg->xtal == 16000000 && (val > 29 || val < 23)) 1449 break; 1450 1451 if (val != 0x3f) 1452 break; 1453 } 1454 1455 if (i == ARRAY_SIZE(r820t_xtal_capacitor)) 1456 return -EINVAL; 1457 1458 return r820t_xtal_capacitor[i][1]; 1459 } 1460 r820t_imr_prepare(struct r820t_priv * priv)1461 static int r820t_imr_prepare(struct r820t_priv *priv) 1462 { 1463 int rc; 1464 1465 /* Initialize the shadow registers */ 1466 memcpy(priv->regs, r820t_init_array, sizeof(r820t_init_array)); 1467 1468 /* lna off (air-in off) */ 1469 rc = r820t_write_reg_mask(priv, 0x05, 0x20, 0x20); 1470 if (rc < 0) 1471 return rc; 1472 1473 /* mixer gain mode = manual */ 1474 rc = r820t_write_reg_mask(priv, 0x07, 0, 0x10); 1475 if (rc < 0) 1476 return rc; 1477 1478 /* filter corner = lowest */ 1479 rc = r820t_write_reg_mask(priv, 0x0a, 0x0f, 0x0f); 1480 if (rc < 0) 1481 return rc; 1482 1483 /* filter bw=+2cap, hp=5M */ 1484 rc = r820t_write_reg_mask(priv, 0x0b, 0x60, 0x6f); 1485 if (rc < 0) 1486 return rc; 1487 1488 /* adc=on, vga code mode, gain = 26.5dB */ 1489 rc = r820t_write_reg_mask(priv, 0x0c, 0x0b, 0x9f); 1490 if (rc < 0) 1491 return rc; 1492 1493 /* ring clk = on */ 1494 rc = r820t_write_reg_mask(priv, 0x0f, 0, 0x08); 1495 if (rc < 0) 1496 return rc; 1497 1498 /* ring power = on */ 1499 rc = r820t_write_reg_mask(priv, 0x18, 0x10, 0x10); 1500 if (rc < 0) 1501 return rc; 1502 1503 /* from ring = ring pll in */ 1504 rc = r820t_write_reg_mask(priv, 0x1c, 0x02, 0x02); 1505 if (rc < 0) 1506 return rc; 1507 1508 /* sw_pdect = det3 */ 1509 rc = r820t_write_reg_mask(priv, 0x1e, 0x80, 0x80); 1510 if (rc < 0) 1511 return rc; 1512 1513 /* Set filt_3dB */ 1514 rc = r820t_write_reg_mask(priv, 0x06, 0x20, 0x20); 1515 1516 return rc; 1517 } 1518 r820t_multi_read(struct r820t_priv * priv)1519 static int r820t_multi_read(struct r820t_priv *priv) 1520 { 1521 int rc, i; 1522 u16 sum = 0; 1523 u8 data[2], min = 255, max = 0; 1524 1525 usleep_range(5000, 6000); 1526 1527 for (i = 0; i < 6; i++) { 1528 rc = r820t_read(priv, 0x00, data, sizeof(data)); 1529 if (rc < 0) 1530 return rc; 1531 1532 sum += data[1]; 1533 1534 if (data[1] < min) 1535 min = data[1]; 1536 1537 if (data[1] > max) 1538 max = data[1]; 1539 } 1540 rc = sum - max - min; 1541 1542 return rc; 1543 } 1544 r820t_imr_cross(struct r820t_priv * priv,struct r820t_sect_type iq_point[3],u8 * x_direct)1545 static int r820t_imr_cross(struct r820t_priv *priv, 1546 struct r820t_sect_type iq_point[3], 1547 u8 *x_direct) 1548 { 1549 struct r820t_sect_type cross[5]; /* (0,0)(0,Q-1)(0,I-1)(Q-1,0)(I-1,0) */ 1550 struct r820t_sect_type tmp; 1551 int i, rc; 1552 u8 reg08, reg09; 1553 1554 reg08 = r820t_read_cache_reg(priv, 8) & 0xc0; 1555 reg09 = r820t_read_cache_reg(priv, 9) & 0xc0; 1556 1557 tmp.gain_x = 0; 1558 tmp.phase_y = 0; 1559 tmp.value = 255; 1560 1561 for (i = 0; i < 5; i++) { 1562 switch (i) { 1563 case 0: 1564 cross[i].gain_x = reg08; 1565 cross[i].phase_y = reg09; 1566 break; 1567 case 1: 1568 cross[i].gain_x = reg08; /* 0 */ 1569 cross[i].phase_y = reg09 + 1; /* Q-1 */ 1570 break; 1571 case 2: 1572 cross[i].gain_x = reg08; /* 0 */ 1573 cross[i].phase_y = (reg09 | 0x20) + 1; /* I-1 */ 1574 break; 1575 case 3: 1576 cross[i].gain_x = reg08 + 1; /* Q-1 */ 1577 cross[i].phase_y = reg09; 1578 break; 1579 default: 1580 cross[i].gain_x = (reg08 | 0x20) + 1; /* I-1 */ 1581 cross[i].phase_y = reg09; 1582 } 1583 1584 rc = r820t_write_reg(priv, 0x08, cross[i].gain_x); 1585 if (rc < 0) 1586 return rc; 1587 1588 rc = r820t_write_reg(priv, 0x09, cross[i].phase_y); 1589 if (rc < 0) 1590 return rc; 1591 1592 rc = r820t_multi_read(priv); 1593 if (rc < 0) 1594 return rc; 1595 1596 cross[i].value = rc; 1597 1598 if (cross[i].value < tmp.value) 1599 tmp = cross[i]; 1600 } 1601 1602 if ((tmp.phase_y & 0x1f) == 1) { /* y-direction */ 1603 *x_direct = 0; 1604 1605 iq_point[0] = cross[0]; 1606 iq_point[1] = cross[1]; 1607 iq_point[2] = cross[2]; 1608 } else { /* (0,0) or x-direction */ 1609 *x_direct = 1; 1610 1611 iq_point[0] = cross[0]; 1612 iq_point[1] = cross[3]; 1613 iq_point[2] = cross[4]; 1614 } 1615 return 0; 1616 } 1617 r820t_compre_cor(struct r820t_sect_type iq[3])1618 static void r820t_compre_cor(struct r820t_sect_type iq[3]) 1619 { 1620 int i; 1621 1622 for (i = 3; i > 0; i--) { 1623 if (iq[0].value > iq[i - 1].value) 1624 swap(iq[0], iq[i - 1]); 1625 } 1626 } 1627 r820t_compre_step(struct r820t_priv * priv,struct r820t_sect_type iq[3],u8 reg)1628 static int r820t_compre_step(struct r820t_priv *priv, 1629 struct r820t_sect_type iq[3], u8 reg) 1630 { 1631 int rc; 1632 struct r820t_sect_type tmp; 1633 1634 /* 1635 * Purpose: if (Gain<9 or Phase<9), Gain+1 or Phase+1 and compare 1636 * with min value: 1637 * new < min => update to min and continue 1638 * new > min => Exit 1639 */ 1640 1641 /* min value already saved in iq[0] */ 1642 tmp.phase_y = iq[0].phase_y; 1643 tmp.gain_x = iq[0].gain_x; 1644 1645 while (((tmp.gain_x & 0x1f) < IMR_TRIAL) && 1646 ((tmp.phase_y & 0x1f) < IMR_TRIAL)) { 1647 if (reg == 0x08) 1648 tmp.gain_x++; 1649 else 1650 tmp.phase_y++; 1651 1652 rc = r820t_write_reg(priv, 0x08, tmp.gain_x); 1653 if (rc < 0) 1654 return rc; 1655 1656 rc = r820t_write_reg(priv, 0x09, tmp.phase_y); 1657 if (rc < 0) 1658 return rc; 1659 1660 rc = r820t_multi_read(priv); 1661 if (rc < 0) 1662 return rc; 1663 tmp.value = rc; 1664 1665 if (tmp.value <= iq[0].value) { 1666 iq[0].gain_x = tmp.gain_x; 1667 iq[0].phase_y = tmp.phase_y; 1668 iq[0].value = tmp.value; 1669 } else { 1670 return 0; 1671 } 1672 1673 } 1674 1675 return 0; 1676 } 1677 r820t_iq_tree(struct r820t_priv * priv,struct r820t_sect_type iq[3],u8 fix_val,u8 var_val,u8 fix_reg)1678 static int r820t_iq_tree(struct r820t_priv *priv, 1679 struct r820t_sect_type iq[3], 1680 u8 fix_val, u8 var_val, u8 fix_reg) 1681 { 1682 int rc, i; 1683 u8 tmp, var_reg; 1684 1685 /* 1686 * record IMC results by input gain/phase location then adjust 1687 * gain or phase positive 1 step and negative 1 step, 1688 * both record results 1689 */ 1690 1691 if (fix_reg == 0x08) 1692 var_reg = 0x09; 1693 else 1694 var_reg = 0x08; 1695 1696 for (i = 0; i < 3; i++) { 1697 rc = r820t_write_reg(priv, fix_reg, fix_val); 1698 if (rc < 0) 1699 return rc; 1700 1701 rc = r820t_write_reg(priv, var_reg, var_val); 1702 if (rc < 0) 1703 return rc; 1704 1705 rc = r820t_multi_read(priv); 1706 if (rc < 0) 1707 return rc; 1708 iq[i].value = rc; 1709 1710 if (fix_reg == 0x08) { 1711 iq[i].gain_x = fix_val; 1712 iq[i].phase_y = var_val; 1713 } else { 1714 iq[i].phase_y = fix_val; 1715 iq[i].gain_x = var_val; 1716 } 1717 1718 if (i == 0) { /* try right-side point */ 1719 var_val++; 1720 } else if (i == 1) { /* try left-side point */ 1721 /* if absolute location is 1, change I/Q direction */ 1722 if ((var_val & 0x1f) < 0x02) { 1723 tmp = 2 - (var_val & 0x1f); 1724 1725 /* b[5]:I/Q selection. 0:Q-path, 1:I-path */ 1726 if (var_val & 0x20) { 1727 var_val &= 0xc0; 1728 var_val |= tmp; 1729 } else { 1730 var_val |= 0x20 | tmp; 1731 } 1732 } else { 1733 var_val -= 2; 1734 } 1735 } 1736 } 1737 1738 return 0; 1739 } 1740 r820t_section(struct r820t_priv * priv,struct r820t_sect_type * iq_point)1741 static int r820t_section(struct r820t_priv *priv, 1742 struct r820t_sect_type *iq_point) 1743 { 1744 int rc; 1745 struct r820t_sect_type compare_iq[3], compare_bet[3]; 1746 1747 /* Try X-1 column and save min result to compare_bet[0] */ 1748 if (!(iq_point->gain_x & 0x1f)) 1749 compare_iq[0].gain_x = ((iq_point->gain_x) & 0xdf) + 1; /* Q-path, Gain=1 */ 1750 else 1751 compare_iq[0].gain_x = iq_point->gain_x - 1; /* left point */ 1752 compare_iq[0].phase_y = iq_point->phase_y; 1753 1754 /* y-direction */ 1755 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x, 1756 compare_iq[0].phase_y, 0x08); 1757 if (rc < 0) 1758 return rc; 1759 1760 r820t_compre_cor(compare_iq); 1761 1762 compare_bet[0] = compare_iq[0]; 1763 1764 /* Try X column and save min result to compare_bet[1] */ 1765 compare_iq[0].gain_x = iq_point->gain_x; 1766 compare_iq[0].phase_y = iq_point->phase_y; 1767 1768 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x, 1769 compare_iq[0].phase_y, 0x08); 1770 if (rc < 0) 1771 return rc; 1772 1773 r820t_compre_cor(compare_iq); 1774 1775 compare_bet[1] = compare_iq[0]; 1776 1777 /* Try X+1 column and save min result to compare_bet[2] */ 1778 if ((iq_point->gain_x & 0x1f) == 0x00) 1779 compare_iq[0].gain_x = ((iq_point->gain_x) | 0x20) + 1; /* I-path, Gain=1 */ 1780 else 1781 compare_iq[0].gain_x = iq_point->gain_x + 1; 1782 compare_iq[0].phase_y = iq_point->phase_y; 1783 1784 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x, 1785 compare_iq[0].phase_y, 0x08); 1786 if (rc < 0) 1787 return rc; 1788 1789 r820t_compre_cor(compare_iq); 1790 1791 compare_bet[2] = compare_iq[0]; 1792 1793 r820t_compre_cor(compare_bet); 1794 1795 *iq_point = compare_bet[0]; 1796 1797 return 0; 1798 } 1799 r820t_vga_adjust(struct r820t_priv * priv)1800 static int r820t_vga_adjust(struct r820t_priv *priv) 1801 { 1802 int rc; 1803 u8 vga_count; 1804 1805 /* increase vga power to let image significant */ 1806 for (vga_count = 12; vga_count < 16; vga_count++) { 1807 rc = r820t_write_reg_mask(priv, 0x0c, vga_count, 0x0f); 1808 if (rc < 0) 1809 return rc; 1810 1811 usleep_range(10000, 11000); 1812 1813 rc = r820t_multi_read(priv); 1814 if (rc < 0) 1815 return rc; 1816 1817 if (rc > 40 * 4) 1818 break; 1819 } 1820 1821 return 0; 1822 } 1823 r820t_iq(struct r820t_priv * priv,struct r820t_sect_type * iq_pont)1824 static int r820t_iq(struct r820t_priv *priv, struct r820t_sect_type *iq_pont) 1825 { 1826 struct r820t_sect_type compare_iq[3]; 1827 int rc; 1828 u8 x_direction = 0; /* 1:x, 0:y */ 1829 u8 dir_reg, other_reg; 1830 1831 r820t_vga_adjust(priv); 1832 1833 rc = r820t_imr_cross(priv, compare_iq, &x_direction); 1834 if (rc < 0) 1835 return rc; 1836 1837 if (x_direction == 1) { 1838 dir_reg = 0x08; 1839 other_reg = 0x09; 1840 } else { 1841 dir_reg = 0x09; 1842 other_reg = 0x08; 1843 } 1844 1845 /* compare and find min of 3 points. determine i/q direction */ 1846 r820t_compre_cor(compare_iq); 1847 1848 /* increase step to find min value of this direction */ 1849 rc = r820t_compre_step(priv, compare_iq, dir_reg); 1850 if (rc < 0) 1851 return rc; 1852 1853 /* the other direction */ 1854 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x, 1855 compare_iq[0].phase_y, dir_reg); 1856 if (rc < 0) 1857 return rc; 1858 1859 /* compare and find min of 3 points. determine i/q direction */ 1860 r820t_compre_cor(compare_iq); 1861 1862 /* increase step to find min value on this direction */ 1863 rc = r820t_compre_step(priv, compare_iq, other_reg); 1864 if (rc < 0) 1865 return rc; 1866 1867 /* check 3 points again */ 1868 rc = r820t_iq_tree(priv, compare_iq, compare_iq[0].gain_x, 1869 compare_iq[0].phase_y, other_reg); 1870 if (rc < 0) 1871 return rc; 1872 1873 r820t_compre_cor(compare_iq); 1874 1875 /* section-9 check */ 1876 rc = r820t_section(priv, compare_iq); 1877 1878 *iq_pont = compare_iq[0]; 1879 1880 /* reset gain/phase control setting */ 1881 rc = r820t_write_reg_mask(priv, 0x08, 0, 0x3f); 1882 if (rc < 0) 1883 return rc; 1884 1885 rc = r820t_write_reg_mask(priv, 0x09, 0, 0x3f); 1886 1887 return rc; 1888 } 1889 r820t_f_imr(struct r820t_priv * priv,struct r820t_sect_type * iq_pont)1890 static int r820t_f_imr(struct r820t_priv *priv, struct r820t_sect_type *iq_pont) 1891 { 1892 int rc; 1893 1894 r820t_vga_adjust(priv); 1895 1896 /* 1897 * search surrounding points from previous point 1898 * try (x-1), (x), (x+1) columns, and find min IMR result point 1899 */ 1900 rc = r820t_section(priv, iq_pont); 1901 if (rc < 0) 1902 return rc; 1903 1904 return 0; 1905 } 1906 r820t_imr(struct r820t_priv * priv,unsigned imr_mem,bool im_flag)1907 static int r820t_imr(struct r820t_priv *priv, unsigned imr_mem, bool im_flag) 1908 { 1909 struct r820t_sect_type imr_point; 1910 int rc; 1911 u32 ring_vco, ring_freq, ring_ref; 1912 u8 n_ring, n; 1913 int reg18, reg19, reg1f; 1914 1915 if (priv->cfg->xtal > 24000000) 1916 ring_ref = priv->cfg->xtal / 2000; 1917 else 1918 ring_ref = priv->cfg->xtal / 1000; 1919 1920 n_ring = 15; 1921 for (n = 0; n < 16; n++) { 1922 if ((16 + n) * 8 * ring_ref >= 3100000) { 1923 n_ring = n; 1924 break; 1925 } 1926 } 1927 1928 reg18 = r820t_read_cache_reg(priv, 0x18); 1929 reg19 = r820t_read_cache_reg(priv, 0x19); 1930 reg1f = r820t_read_cache_reg(priv, 0x1f); 1931 1932 reg18 &= 0xf0; /* set ring[3:0] */ 1933 reg18 |= n_ring; 1934 1935 ring_vco = (16 + n_ring) * 8 * ring_ref; 1936 1937 reg18 &= 0xdf; /* clear ring_se23 */ 1938 reg19 &= 0xfc; /* clear ring_seldiv */ 1939 reg1f &= 0xfc; /* clear ring_att */ 1940 1941 switch (imr_mem) { 1942 case 0: 1943 ring_freq = ring_vco / 48; 1944 reg18 |= 0x20; /* ring_se23 = 1 */ 1945 reg19 |= 0x03; /* ring_seldiv = 3 */ 1946 reg1f |= 0x02; /* ring_att 10 */ 1947 break; 1948 case 1: 1949 ring_freq = ring_vco / 16; 1950 reg18 |= 0x00; /* ring_se23 = 0 */ 1951 reg19 |= 0x02; /* ring_seldiv = 2 */ 1952 reg1f |= 0x00; /* pw_ring 00 */ 1953 break; 1954 case 2: 1955 ring_freq = ring_vco / 8; 1956 reg18 |= 0x00; /* ring_se23 = 0 */ 1957 reg19 |= 0x01; /* ring_seldiv = 1 */ 1958 reg1f |= 0x03; /* pw_ring 11 */ 1959 break; 1960 case 3: 1961 ring_freq = ring_vco / 6; 1962 reg18 |= 0x20; /* ring_se23 = 1 */ 1963 reg19 |= 0x00; /* ring_seldiv = 0 */ 1964 reg1f |= 0x03; /* pw_ring 11 */ 1965 break; 1966 case 4: 1967 ring_freq = ring_vco / 4; 1968 reg18 |= 0x00; /* ring_se23 = 0 */ 1969 reg19 |= 0x00; /* ring_seldiv = 0 */ 1970 reg1f |= 0x01; /* pw_ring 01 */ 1971 break; 1972 default: 1973 ring_freq = ring_vco / 4; 1974 reg18 |= 0x00; /* ring_se23 = 0 */ 1975 reg19 |= 0x00; /* ring_seldiv = 0 */ 1976 reg1f |= 0x01; /* pw_ring 01 */ 1977 break; 1978 } 1979 1980 1981 /* write pw_ring, n_ring, ringdiv2 registers */ 1982 1983 /* n_ring, ring_se23 */ 1984 rc = r820t_write_reg(priv, 0x18, reg18); 1985 if (rc < 0) 1986 return rc; 1987 1988 /* ring_sediv */ 1989 rc = r820t_write_reg(priv, 0x19, reg19); 1990 if (rc < 0) 1991 return rc; 1992 1993 /* pw_ring */ 1994 rc = r820t_write_reg(priv, 0x1f, reg1f); 1995 if (rc < 0) 1996 return rc; 1997 1998 /* mux input freq ~ rf_in freq */ 1999 rc = r820t_set_mux(priv, (ring_freq - 5300) * 1000); 2000 if (rc < 0) 2001 return rc; 2002 2003 rc = r820t_set_pll(priv, V4L2_TUNER_DIGITAL_TV, 2004 (ring_freq - 5300) * 1000); 2005 if (!priv->has_lock) 2006 rc = -EINVAL; 2007 if (rc < 0) 2008 return rc; 2009 2010 if (im_flag) { 2011 rc = r820t_iq(priv, &imr_point); 2012 } else { 2013 imr_point.gain_x = priv->imr_data[3].gain_x; 2014 imr_point.phase_y = priv->imr_data[3].phase_y; 2015 imr_point.value = priv->imr_data[3].value; 2016 2017 rc = r820t_f_imr(priv, &imr_point); 2018 } 2019 if (rc < 0) 2020 return rc; 2021 2022 /* save IMR value */ 2023 switch (imr_mem) { 2024 case 0: 2025 priv->imr_data[0].gain_x = imr_point.gain_x; 2026 priv->imr_data[0].phase_y = imr_point.phase_y; 2027 priv->imr_data[0].value = imr_point.value; 2028 break; 2029 case 1: 2030 priv->imr_data[1].gain_x = imr_point.gain_x; 2031 priv->imr_data[1].phase_y = imr_point.phase_y; 2032 priv->imr_data[1].value = imr_point.value; 2033 break; 2034 case 2: 2035 priv->imr_data[2].gain_x = imr_point.gain_x; 2036 priv->imr_data[2].phase_y = imr_point.phase_y; 2037 priv->imr_data[2].value = imr_point.value; 2038 break; 2039 case 3: 2040 priv->imr_data[3].gain_x = imr_point.gain_x; 2041 priv->imr_data[3].phase_y = imr_point.phase_y; 2042 priv->imr_data[3].value = imr_point.value; 2043 break; 2044 case 4: 2045 priv->imr_data[4].gain_x = imr_point.gain_x; 2046 priv->imr_data[4].phase_y = imr_point.phase_y; 2047 priv->imr_data[4].value = imr_point.value; 2048 break; 2049 default: 2050 priv->imr_data[4].gain_x = imr_point.gain_x; 2051 priv->imr_data[4].phase_y = imr_point.phase_y; 2052 priv->imr_data[4].value = imr_point.value; 2053 break; 2054 } 2055 2056 return 0; 2057 } 2058 r820t_imr_callibrate(struct r820t_priv * priv)2059 static int r820t_imr_callibrate(struct r820t_priv *priv) 2060 { 2061 int rc, i; 2062 int xtal_cap = 0; 2063 2064 if (priv->init_done) 2065 return 0; 2066 2067 /* Detect Xtal capacitance */ 2068 if ((priv->cfg->rafael_chip == CHIP_R820T) || 2069 (priv->cfg->rafael_chip == CHIP_R828S) || 2070 (priv->cfg->rafael_chip == CHIP_R820C)) { 2071 priv->xtal_cap_sel = XTAL_HIGH_CAP_0P; 2072 } else { 2073 /* Initialize registers */ 2074 rc = r820t_write(priv, 0x05, 2075 r820t_init_array, sizeof(r820t_init_array)); 2076 if (rc < 0) 2077 return rc; 2078 for (i = 0; i < 3; i++) { 2079 rc = r820t_xtal_check(priv); 2080 if (rc < 0) 2081 return rc; 2082 if (!i || rc > xtal_cap) 2083 xtal_cap = rc; 2084 } 2085 priv->xtal_cap_sel = xtal_cap; 2086 } 2087 2088 /* 2089 * Disables IMR calibration. That emulates the same behaviour 2090 * as what is done by rtl-sdr userspace library. Useful for testing 2091 */ 2092 if (no_imr_cal) { 2093 priv->init_done = true; 2094 2095 return 0; 2096 } 2097 2098 /* Initialize registers */ 2099 rc = r820t_write(priv, 0x05, 2100 r820t_init_array, sizeof(r820t_init_array)); 2101 if (rc < 0) 2102 return rc; 2103 2104 rc = r820t_imr_prepare(priv); 2105 if (rc < 0) 2106 return rc; 2107 2108 rc = r820t_imr(priv, 3, true); 2109 if (rc < 0) 2110 return rc; 2111 rc = r820t_imr(priv, 1, false); 2112 if (rc < 0) 2113 return rc; 2114 rc = r820t_imr(priv, 0, false); 2115 if (rc < 0) 2116 return rc; 2117 rc = r820t_imr(priv, 2, false); 2118 if (rc < 0) 2119 return rc; 2120 rc = r820t_imr(priv, 4, false); 2121 if (rc < 0) 2122 return rc; 2123 2124 priv->init_done = true; 2125 priv->imr_done = true; 2126 2127 return 0; 2128 } 2129 2130 #if 0 2131 /* Not used, for now */ 2132 static int r820t_gpio(struct r820t_priv *priv, bool enable) 2133 { 2134 return r820t_write_reg_mask(priv, 0x0f, enable ? 1 : 0, 0x01); 2135 } 2136 #endif 2137 2138 /* 2139 * r820t frontend operations and tuner attach code 2140 * 2141 * All driver locks and i2c control are only in this part of the code 2142 */ 2143 r820t_init(struct dvb_frontend * fe)2144 static int r820t_init(struct dvb_frontend *fe) 2145 { 2146 struct r820t_priv *priv = fe->tuner_priv; 2147 int rc; 2148 2149 tuner_dbg("%s:\n", __func__); 2150 2151 mutex_lock(&priv->lock); 2152 if (fe->ops.i2c_gate_ctrl) 2153 fe->ops.i2c_gate_ctrl(fe, 1); 2154 2155 rc = r820t_imr_callibrate(priv); 2156 if (rc < 0) 2157 goto err; 2158 2159 /* Initialize registers */ 2160 rc = r820t_write(priv, 0x05, 2161 r820t_init_array, sizeof(r820t_init_array)); 2162 2163 err: 2164 if (fe->ops.i2c_gate_ctrl) 2165 fe->ops.i2c_gate_ctrl(fe, 0); 2166 mutex_unlock(&priv->lock); 2167 2168 if (rc < 0) 2169 tuner_dbg("%s: failed=%d\n", __func__, rc); 2170 return rc; 2171 } 2172 r820t_sleep(struct dvb_frontend * fe)2173 static int r820t_sleep(struct dvb_frontend *fe) 2174 { 2175 struct r820t_priv *priv = fe->tuner_priv; 2176 int rc; 2177 2178 tuner_dbg("%s:\n", __func__); 2179 2180 mutex_lock(&priv->lock); 2181 if (fe->ops.i2c_gate_ctrl) 2182 fe->ops.i2c_gate_ctrl(fe, 1); 2183 2184 rc = r820t_standby(priv); 2185 2186 if (fe->ops.i2c_gate_ctrl) 2187 fe->ops.i2c_gate_ctrl(fe, 0); 2188 mutex_unlock(&priv->lock); 2189 2190 tuner_dbg("%s: failed=%d\n", __func__, rc); 2191 return rc; 2192 } 2193 r820t_set_analog_freq(struct dvb_frontend * fe,struct analog_parameters * p)2194 static int r820t_set_analog_freq(struct dvb_frontend *fe, 2195 struct analog_parameters *p) 2196 { 2197 struct r820t_priv *priv = fe->tuner_priv; 2198 unsigned bw; 2199 int rc; 2200 2201 tuner_dbg("%s called\n", __func__); 2202 2203 /* if std is not defined, choose one */ 2204 if (!p->std) 2205 p->std = V4L2_STD_MN; 2206 2207 if ((p->std == V4L2_STD_PAL_M) || (p->std == V4L2_STD_NTSC)) 2208 bw = 6; 2209 else 2210 bw = 8; 2211 2212 mutex_lock(&priv->lock); 2213 if (fe->ops.i2c_gate_ctrl) 2214 fe->ops.i2c_gate_ctrl(fe, 1); 2215 2216 rc = generic_set_freq(fe, 62500l * p->frequency, bw, 2217 V4L2_TUNER_ANALOG_TV, p->std, SYS_UNDEFINED); 2218 2219 if (fe->ops.i2c_gate_ctrl) 2220 fe->ops.i2c_gate_ctrl(fe, 0); 2221 mutex_unlock(&priv->lock); 2222 2223 return rc; 2224 } 2225 r820t_set_params(struct dvb_frontend * fe)2226 static int r820t_set_params(struct dvb_frontend *fe) 2227 { 2228 struct r820t_priv *priv = fe->tuner_priv; 2229 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 2230 int rc; 2231 unsigned bw; 2232 2233 tuner_dbg("%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n", 2234 __func__, c->delivery_system, c->frequency, c->bandwidth_hz); 2235 2236 mutex_lock(&priv->lock); 2237 if (fe->ops.i2c_gate_ctrl) 2238 fe->ops.i2c_gate_ctrl(fe, 1); 2239 2240 bw = (c->bandwidth_hz + 500000) / 1000000; 2241 if (!bw) 2242 bw = 8; 2243 2244 rc = generic_set_freq(fe, c->frequency, bw, 2245 V4L2_TUNER_DIGITAL_TV, 0, c->delivery_system); 2246 2247 if (fe->ops.i2c_gate_ctrl) 2248 fe->ops.i2c_gate_ctrl(fe, 0); 2249 mutex_unlock(&priv->lock); 2250 2251 if (rc) 2252 tuner_dbg("%s: failed=%d\n", __func__, rc); 2253 return rc; 2254 } 2255 r820t_signal(struct dvb_frontend * fe,u16 * strength)2256 static int r820t_signal(struct dvb_frontend *fe, u16 *strength) 2257 { 2258 struct r820t_priv *priv = fe->tuner_priv; 2259 int rc = 0; 2260 2261 mutex_lock(&priv->lock); 2262 if (fe->ops.i2c_gate_ctrl) 2263 fe->ops.i2c_gate_ctrl(fe, 1); 2264 2265 if (priv->has_lock) { 2266 rc = r820t_read_gain(priv); 2267 if (rc < 0) 2268 goto err; 2269 2270 /* A higher gain at LNA means a lower signal strength */ 2271 *strength = (45 - rc) << 4 | 0xff; 2272 if (*strength == 0xff) 2273 *strength = 0; 2274 } else { 2275 *strength = 0; 2276 } 2277 2278 err: 2279 if (fe->ops.i2c_gate_ctrl) 2280 fe->ops.i2c_gate_ctrl(fe, 0); 2281 mutex_unlock(&priv->lock); 2282 2283 tuner_dbg("%s: %s, gain=%d strength=%d\n", 2284 __func__, 2285 priv->has_lock ? "PLL locked" : "no signal", 2286 rc, *strength); 2287 2288 return 0; 2289 } 2290 r820t_get_if_frequency(struct dvb_frontend * fe,u32 * frequency)2291 static int r820t_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) 2292 { 2293 struct r820t_priv *priv = fe->tuner_priv; 2294 2295 tuner_dbg("%s:\n", __func__); 2296 2297 *frequency = priv->int_freq; 2298 2299 return 0; 2300 } 2301 r820t_release(struct dvb_frontend * fe)2302 static void r820t_release(struct dvb_frontend *fe) 2303 { 2304 struct r820t_priv *priv = fe->tuner_priv; 2305 2306 tuner_dbg("%s:\n", __func__); 2307 2308 mutex_lock(&r820t_list_mutex); 2309 2310 if (priv) 2311 hybrid_tuner_release_state(priv); 2312 2313 mutex_unlock(&r820t_list_mutex); 2314 2315 fe->tuner_priv = NULL; 2316 } 2317 2318 static const struct dvb_tuner_ops r820t_tuner_ops = { 2319 .info = { 2320 .name = "Rafael Micro R820T", 2321 .frequency_min_hz = 42 * MHz, 2322 .frequency_max_hz = 1002 * MHz, 2323 }, 2324 .init = r820t_init, 2325 .release = r820t_release, 2326 .sleep = r820t_sleep, 2327 .set_params = r820t_set_params, 2328 .set_analog_params = r820t_set_analog_freq, 2329 .get_if_frequency = r820t_get_if_frequency, 2330 .get_rf_strength = r820t_signal, 2331 }; 2332 r820t_attach(struct dvb_frontend * fe,struct i2c_adapter * i2c,const struct r820t_config * cfg)2333 struct dvb_frontend *r820t_attach(struct dvb_frontend *fe, 2334 struct i2c_adapter *i2c, 2335 const struct r820t_config *cfg) 2336 { 2337 struct r820t_priv *priv; 2338 int rc = -ENODEV; 2339 u8 data[5]; 2340 int instance; 2341 2342 mutex_lock(&r820t_list_mutex); 2343 2344 instance = hybrid_tuner_request_state(struct r820t_priv, priv, 2345 hybrid_tuner_instance_list, 2346 i2c, cfg->i2c_addr, 2347 "r820t"); 2348 switch (instance) { 2349 case 0: 2350 /* memory allocation failure */ 2351 goto err_no_gate; 2352 case 1: 2353 /* new tuner instance */ 2354 priv->cfg = cfg; 2355 2356 mutex_init(&priv->lock); 2357 2358 fe->tuner_priv = priv; 2359 break; 2360 case 2: 2361 /* existing tuner instance */ 2362 fe->tuner_priv = priv; 2363 break; 2364 } 2365 2366 if (fe->ops.i2c_gate_ctrl) 2367 fe->ops.i2c_gate_ctrl(fe, 1); 2368 2369 /* check if the tuner is there */ 2370 rc = r820t_read(priv, 0x00, data, sizeof(data)); 2371 if (rc < 0) 2372 goto err; 2373 2374 rc = r820t_sleep(fe); 2375 if (rc < 0) 2376 goto err; 2377 2378 tuner_info( 2379 "Rafael Micro r820t successfully identified, chip type: %s\n", 2380 r820t_chip_enum_to_str(cfg->rafael_chip)); 2381 2382 if (fe->ops.i2c_gate_ctrl) 2383 fe->ops.i2c_gate_ctrl(fe, 0); 2384 2385 mutex_unlock(&r820t_list_mutex); 2386 2387 memcpy(&fe->ops.tuner_ops, &r820t_tuner_ops, 2388 sizeof(struct dvb_tuner_ops)); 2389 2390 return fe; 2391 err: 2392 if (fe->ops.i2c_gate_ctrl) 2393 fe->ops.i2c_gate_ctrl(fe, 0); 2394 2395 err_no_gate: 2396 mutex_unlock(&r820t_list_mutex); 2397 2398 pr_info("%s: failed=%d\n", __func__, rc); 2399 r820t_release(fe); 2400 return NULL; 2401 } 2402 EXPORT_SYMBOL_GPL(r820t_attach); 2403 2404 MODULE_DESCRIPTION("Rafael Micro r820t silicon tuner driver"); 2405 MODULE_AUTHOR("Mauro Carvalho Chehab"); 2406 MODULE_LICENSE("GPL v2"); 2407