1 /* 2 * Driver for the Integrant ITD1000 "Zero-IF Tuner IC for Direct Broadcast Satellite" 3 * 4 * Copyright (c) 2007-8 Patrick Boettcher <pb@linuxtv.org> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.= 20 */ 21 22 #include <linux/module.h> 23 #include <linux/moduleparam.h> 24 #include <linux/delay.h> 25 #include <linux/dvb/frontend.h> 26 #include <linux/i2c.h> 27 #include <linux/slab.h> 28 29 #include "dvb_frontend.h" 30 31 #include "itd1000.h" 32 #include "itd1000_priv.h" 33 34 /* Max transfer size done by I2C transfer functions */ 35 #define MAX_XFER_SIZE 64 36 37 static int debug; 38 module_param(debug, int, 0644); 39 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); 40 41 #define itd_dbg(args...) do { \ 42 if (debug) { \ 43 printk(KERN_DEBUG "ITD1000: " args);\ 44 } \ 45 } while (0) 46 47 #define itd_warn(args...) do { \ 48 printk(KERN_WARNING "ITD1000: " args); \ 49 } while (0) 50 51 #define itd_info(args...) do { \ 52 printk(KERN_INFO "ITD1000: " args); \ 53 } while (0) 54 55 /* don't write more than one byte with flexcop behind */ 56 static int itd1000_write_regs(struct itd1000_state *state, u8 reg, u8 v[], u8 len) 57 { 58 u8 buf[MAX_XFER_SIZE]; 59 struct i2c_msg msg = { 60 .addr = state->cfg->i2c_address, .flags = 0, .buf = buf, .len = len+1 61 }; 62 63 if (1 + len > sizeof(buf)) { 64 printk(KERN_WARNING 65 "itd1000: i2c wr reg=%04x: len=%d is too big!\n", 66 reg, len); 67 return -EINVAL; 68 } 69 70 buf[0] = reg; 71 memcpy(&buf[1], v, len); 72 73 /* itd_dbg("wr %02x: %02x\n", reg, v[0]); */ 74 75 if (i2c_transfer(state->i2c, &msg, 1) != 1) { 76 printk(KERN_WARNING "itd1000 I2C write failed\n"); 77 return -EREMOTEIO; 78 } 79 return 0; 80 } 81 82 static int itd1000_read_reg(struct itd1000_state *state, u8 reg) 83 { 84 u8 val; 85 struct i2c_msg msg[2] = { 86 { .addr = state->cfg->i2c_address, .flags = 0, .buf = ®, .len = 1 }, 87 { .addr = state->cfg->i2c_address, .flags = I2C_M_RD, .buf = &val, .len = 1 }, 88 }; 89 90 /* ugly flexcop workaround */ 91 itd1000_write_regs(state, (reg - 1) & 0xff, &state->shadow[(reg - 1) & 0xff], 1); 92 93 if (i2c_transfer(state->i2c, msg, 2) != 2) { 94 itd_warn("itd1000 I2C read failed\n"); 95 return -EREMOTEIO; 96 } 97 return val; 98 } 99 100 static inline int itd1000_write_reg(struct itd1000_state *state, u8 r, u8 v) 101 { 102 int ret = itd1000_write_regs(state, r, &v, 1); 103 state->shadow[r] = v; 104 return ret; 105 } 106 107 108 static struct { 109 u32 symbol_rate; 110 u8 pgaext : 4; /* PLLFH */ 111 u8 bbgvmin : 4; /* BBGVMIN */ 112 } itd1000_lpf_pga[] = { 113 { 0, 0x8, 0x3 }, 114 { 5200000, 0x8, 0x3 }, 115 { 12200000, 0x4, 0x3 }, 116 { 15400000, 0x2, 0x3 }, 117 { 19800000, 0x2, 0x3 }, 118 { 21500000, 0x2, 0x3 }, 119 { 24500000, 0x2, 0x3 }, 120 { 28400000, 0x2, 0x3 }, 121 { 33400000, 0x2, 0x3 }, 122 { 34400000, 0x1, 0x4 }, 123 { 34400000, 0x1, 0x4 }, 124 { 38400000, 0x1, 0x4 }, 125 { 38400000, 0x1, 0x4 }, 126 { 40400000, 0x1, 0x4 }, 127 { 45400000, 0x1, 0x4 }, 128 }; 129 130 static void itd1000_set_lpf_bw(struct itd1000_state *state, u32 symbol_rate) 131 { 132 u8 i; 133 u8 con1 = itd1000_read_reg(state, CON1) & 0xfd; 134 u8 pllfh = itd1000_read_reg(state, PLLFH) & 0x0f; 135 u8 bbgvmin = itd1000_read_reg(state, BBGVMIN) & 0xf0; 136 u8 bw = itd1000_read_reg(state, BW) & 0xf0; 137 138 itd_dbg("symbol_rate = %d\n", symbol_rate); 139 140 /* not sure what is that ? - starting to download the table */ 141 itd1000_write_reg(state, CON1, con1 | (1 << 1)); 142 143 for (i = 0; i < ARRAY_SIZE(itd1000_lpf_pga); i++) 144 if (symbol_rate < itd1000_lpf_pga[i].symbol_rate) { 145 itd_dbg("symrate: index: %d pgaext: %x, bbgvmin: %x\n", i, itd1000_lpf_pga[i].pgaext, itd1000_lpf_pga[i].bbgvmin); 146 itd1000_write_reg(state, PLLFH, pllfh | (itd1000_lpf_pga[i].pgaext << 4)); 147 itd1000_write_reg(state, BBGVMIN, bbgvmin | (itd1000_lpf_pga[i].bbgvmin)); 148 itd1000_write_reg(state, BW, bw | (i & 0x0f)); 149 break; 150 } 151 152 itd1000_write_reg(state, CON1, con1 | (0 << 1)); 153 } 154 155 static struct { 156 u8 vcorg; 157 u32 fmax_rg; 158 } itd1000_vcorg[] = { 159 { 1, 920000 }, 160 { 2, 971000 }, 161 { 3, 1031000 }, 162 { 4, 1091000 }, 163 { 5, 1171000 }, 164 { 6, 1281000 }, 165 { 7, 1381000 }, 166 { 8, 500000 }, /* this is intentional. */ 167 { 9, 1451000 }, 168 { 10, 1531000 }, 169 { 11, 1631000 }, 170 { 12, 1741000 }, 171 { 13, 1891000 }, 172 { 14, 2071000 }, 173 { 15, 2250000 }, 174 }; 175 176 static void itd1000_set_vco(struct itd1000_state *state, u32 freq_khz) 177 { 178 u8 i; 179 u8 gvbb_i2c = itd1000_read_reg(state, GVBB_I2C) & 0xbf; 180 u8 vco_chp1_i2c = itd1000_read_reg(state, VCO_CHP1_I2C) & 0x0f; 181 u8 adcout; 182 183 /* reserved bit again (reset ?) */ 184 itd1000_write_reg(state, GVBB_I2C, gvbb_i2c | (1 << 6)); 185 186 for (i = 0; i < ARRAY_SIZE(itd1000_vcorg); i++) { 187 if (freq_khz < itd1000_vcorg[i].fmax_rg) { 188 itd1000_write_reg(state, VCO_CHP1_I2C, vco_chp1_i2c | (itd1000_vcorg[i].vcorg << 4)); 189 msleep(1); 190 191 adcout = itd1000_read_reg(state, PLLLOCK) & 0x0f; 192 193 itd_dbg("VCO: %dkHz: %d -> ADCOUT: %d %02x\n", freq_khz, itd1000_vcorg[i].vcorg, adcout, vco_chp1_i2c); 194 195 if (adcout > 13) { 196 if (!(itd1000_vcorg[i].vcorg == 7 || itd1000_vcorg[i].vcorg == 15)) 197 itd1000_write_reg(state, VCO_CHP1_I2C, vco_chp1_i2c | ((itd1000_vcorg[i].vcorg + 1) << 4)); 198 } else if (adcout < 2) { 199 if (!(itd1000_vcorg[i].vcorg == 1 || itd1000_vcorg[i].vcorg == 9)) 200 itd1000_write_reg(state, VCO_CHP1_I2C, vco_chp1_i2c | ((itd1000_vcorg[i].vcorg - 1) << 4)); 201 } 202 break; 203 } 204 } 205 } 206 207 static const struct { 208 u32 freq; 209 u8 values[10]; /* RFTR, RFST1 - RFST9 */ 210 } itd1000_fre_values[] = { 211 { 1075000, { 0x59, 0x1d, 0x1c, 0x17, 0x16, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } }, 212 { 1250000, { 0x89, 0x1e, 0x1d, 0x17, 0x15, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } }, 213 { 1450000, { 0x89, 0x1e, 0x1d, 0x17, 0x15, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } }, 214 { 1650000, { 0x69, 0x1e, 0x1d, 0x17, 0x15, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } }, 215 { 1750000, { 0x69, 0x1e, 0x17, 0x15, 0x14, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } }, 216 { 1850000, { 0x69, 0x1d, 0x17, 0x16, 0x14, 0x0f, 0x0e, 0x0d, 0x0b, 0x0a } }, 217 { 1900000, { 0x69, 0x1d, 0x17, 0x15, 0x14, 0x0f, 0x0e, 0x0d, 0x0b, 0x0a } }, 218 { 1950000, { 0x69, 0x1d, 0x17, 0x16, 0x14, 0x13, 0x0e, 0x0d, 0x0b, 0x0a } }, 219 { 2050000, { 0x69, 0x1e, 0x1d, 0x17, 0x16, 0x14, 0x13, 0x0e, 0x0b, 0x0a } }, 220 { 2150000, { 0x69, 0x1d, 0x1c, 0x17, 0x15, 0x14, 0x13, 0x0f, 0x0e, 0x0b } } 221 }; 222 223 224 #define FREF 16 225 226 static void itd1000_set_lo(struct itd1000_state *state, u32 freq_khz) 227 { 228 int i, j; 229 u32 plln, pllf; 230 u64 tmp; 231 232 plln = (freq_khz * 1000) / 2 / FREF; 233 234 /* Compute the factional part times 1000 */ 235 tmp = plln % 1000000; 236 plln /= 1000000; 237 238 tmp *= 1048576; 239 do_div(tmp, 1000000); 240 pllf = (u32) tmp; 241 242 state->frequency = ((plln * 1000) + (pllf * 1000)/1048576) * 2*FREF; 243 itd_dbg("frequency: %dkHz (wanted) %dkHz (set), PLLF = %d, PLLN = %d\n", freq_khz, state->frequency, pllf, plln); 244 245 itd1000_write_reg(state, PLLNH, 0x80); /* PLLNH */ 246 itd1000_write_reg(state, PLLNL, plln & 0xff); 247 itd1000_write_reg(state, PLLFH, (itd1000_read_reg(state, PLLFH) & 0xf0) | ((pllf >> 16) & 0x0f)); 248 itd1000_write_reg(state, PLLFM, (pllf >> 8) & 0xff); 249 itd1000_write_reg(state, PLLFL, (pllf >> 0) & 0xff); 250 251 for (i = 0; i < ARRAY_SIZE(itd1000_fre_values); i++) { 252 if (freq_khz <= itd1000_fre_values[i].freq) { 253 itd_dbg("fre_values: %d\n", i); 254 itd1000_write_reg(state, RFTR, itd1000_fre_values[i].values[0]); 255 for (j = 0; j < 9; j++) 256 itd1000_write_reg(state, RFST1+j, itd1000_fre_values[i].values[j+1]); 257 break; 258 } 259 } 260 261 itd1000_set_vco(state, freq_khz); 262 } 263 264 static int itd1000_set_parameters(struct dvb_frontend *fe) 265 { 266 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 267 struct itd1000_state *state = fe->tuner_priv; 268 u8 pllcon1; 269 270 itd1000_set_lo(state, c->frequency); 271 itd1000_set_lpf_bw(state, c->symbol_rate); 272 273 pllcon1 = itd1000_read_reg(state, PLLCON1) & 0x7f; 274 itd1000_write_reg(state, PLLCON1, pllcon1 | (1 << 7)); 275 itd1000_write_reg(state, PLLCON1, pllcon1); 276 277 return 0; 278 } 279 280 static int itd1000_get_frequency(struct dvb_frontend *fe, u32 *frequency) 281 { 282 struct itd1000_state *state = fe->tuner_priv; 283 *frequency = state->frequency; 284 return 0; 285 } 286 287 static int itd1000_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) 288 { 289 return 0; 290 } 291 292 static u8 itd1000_init_tab[][2] = { 293 { PLLCON1, 0x65 }, /* Register does not change */ 294 { PLLNH, 0x80 }, /* Bits [7:6] do not change */ 295 { RESERVED_0X6D, 0x3b }, 296 { VCO_CHP2_I2C, 0x12 }, 297 { 0x72, 0xf9 }, /* No such regsister defined */ 298 { RESERVED_0X73, 0xff }, 299 { RESERVED_0X74, 0xb2 }, 300 { RESERVED_0X75, 0xc7 }, 301 { EXTGVBBRF, 0xf0 }, 302 { DIVAGCCK, 0x80 }, 303 { BBTR, 0xa0 }, 304 { RESERVED_0X7E, 0x4f }, 305 { 0x82, 0x88 }, /* No such regsister defined */ 306 { 0x83, 0x80 }, /* No such regsister defined */ 307 { 0x84, 0x80 }, /* No such regsister defined */ 308 { RESERVED_0X85, 0x74 }, 309 { RESERVED_0X86, 0xff }, 310 { RESERVED_0X88, 0x02 }, 311 { RESERVED_0X89, 0x16 }, 312 { RFST0, 0x1f }, 313 { RESERVED_0X94, 0x66 }, 314 { RESERVED_0X95, 0x66 }, 315 { RESERVED_0X96, 0x77 }, 316 { RESERVED_0X97, 0x99 }, 317 { RESERVED_0X98, 0xff }, 318 { RESERVED_0X99, 0xfc }, 319 { RESERVED_0X9A, 0xba }, 320 { RESERVED_0X9B, 0xaa }, 321 }; 322 323 static u8 itd1000_reinit_tab[][2] = { 324 { VCO_CHP1_I2C, 0x8a }, 325 { BW, 0x87 }, 326 { GVBB_I2C, 0x03 }, 327 { BBGVMIN, 0x03 }, 328 { CON1, 0x2e }, 329 }; 330 331 332 static int itd1000_init(struct dvb_frontend *fe) 333 { 334 struct itd1000_state *state = fe->tuner_priv; 335 int i; 336 337 for (i = 0; i < ARRAY_SIZE(itd1000_init_tab); i++) 338 itd1000_write_reg(state, itd1000_init_tab[i][0], itd1000_init_tab[i][1]); 339 340 for (i = 0; i < ARRAY_SIZE(itd1000_reinit_tab); i++) 341 itd1000_write_reg(state, itd1000_reinit_tab[i][0], itd1000_reinit_tab[i][1]); 342 343 return 0; 344 } 345 346 static int itd1000_sleep(struct dvb_frontend *fe) 347 { 348 return 0; 349 } 350 351 static int itd1000_release(struct dvb_frontend *fe) 352 { 353 kfree(fe->tuner_priv); 354 fe->tuner_priv = NULL; 355 return 0; 356 } 357 358 static const struct dvb_tuner_ops itd1000_tuner_ops = { 359 .info = { 360 .name = "Integrant ITD1000", 361 .frequency_min = 950000, 362 .frequency_max = 2150000, 363 .frequency_step = 125, /* kHz for QPSK frontends */ 364 }, 365 366 .release = itd1000_release, 367 368 .init = itd1000_init, 369 .sleep = itd1000_sleep, 370 371 .set_params = itd1000_set_parameters, 372 .get_frequency = itd1000_get_frequency, 373 .get_bandwidth = itd1000_get_bandwidth 374 }; 375 376 377 struct dvb_frontend *itd1000_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct itd1000_config *cfg) 378 { 379 struct itd1000_state *state = NULL; 380 u8 i = 0; 381 382 state = kzalloc(sizeof(struct itd1000_state), GFP_KERNEL); 383 if (state == NULL) 384 return NULL; 385 386 state->cfg = cfg; 387 state->i2c = i2c; 388 389 i = itd1000_read_reg(state, 0); 390 if (i != 0) { 391 kfree(state); 392 return NULL; 393 } 394 itd_info("successfully identified (ID: %d)\n", i); 395 396 memset(state->shadow, 0xff, sizeof(state->shadow)); 397 for (i = 0x65; i < 0x9c; i++) 398 state->shadow[i] = itd1000_read_reg(state, i); 399 400 memcpy(&fe->ops.tuner_ops, &itd1000_tuner_ops, sizeof(struct dvb_tuner_ops)); 401 402 fe->tuner_priv = state; 403 404 return fe; 405 } 406 EXPORT_SYMBOL(itd1000_attach); 407 408 MODULE_AUTHOR("Patrick Boettcher <pb@linuxtv.org>"); 409 MODULE_DESCRIPTION("Integrant ITD1000 driver"); 410 MODULE_LICENSE("GPL"); 411