Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | Conexant 22702 DVB OFDM demodulator driver |
| 3 | |
| 4 | based on: |
Mauro Carvalho Chehab | 9101e62 | 2005-12-12 00:37:24 -0800 | [diff] [blame] | 5 | Alps TDMB7 DVB OFDM demodulator driver |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | |
| 7 | Copyright (C) 2001-2002 Convergence Integrated Media GmbH |
| 8 | Holger Waechtler <holger@convergence.de> |
| 9 | |
Steven Toth | 9b9225f | 2005-12-01 00:51:53 -0800 | [diff] [blame] | 10 | Copyright (C) 2004 Steven Toth <stoth@hauppauge.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | |
| 12 | This program is free software; you can redistribute it and/or modify |
| 13 | it under the terms of the GNU General Public License as published by |
| 14 | the Free Software Foundation; either version 2 of the License, or |
| 15 | (at your option) any later version. |
| 16 | |
| 17 | This program is distributed in the hope that it will be useful, |
| 18 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | GNU General Public License for more details. |
| 21 | |
| 22 | You should have received a copy of the GNU General Public License |
| 23 | along with this program; if not, write to the Free Software |
| 24 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 25 | |
| 26 | */ |
| 27 | |
| 28 | #include <linux/kernel.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/module.h> |
| 31 | #include <linux/string.h> |
| 32 | #include <linux/slab.h> |
| 33 | #include <linux/delay.h> |
| 34 | #include "dvb_frontend.h" |
Gerd Knorr | 9990d74 | 2005-05-01 08:59:20 -0700 | [diff] [blame] | 35 | #include "dvb-pll.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "cx22702.h" |
| 37 | |
| 38 | |
| 39 | struct cx22702_state { |
| 40 | |
| 41 | struct i2c_adapter* i2c; |
| 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | /* configuration settings */ |
| 44 | const struct cx22702_config* config; |
| 45 | |
| 46 | struct dvb_frontend frontend; |
| 47 | |
| 48 | /* previous uncorrected block counter */ |
| 49 | u8 prevUCBlocks; |
| 50 | }; |
| 51 | |
| 52 | static int debug = 0; |
| 53 | #define dprintk if (debug) printk |
| 54 | |
| 55 | /* Register values to initialise the demod */ |
| 56 | static u8 init_tab [] = { |
| 57 | 0x00, 0x00, /* Stop aquisition */ |
| 58 | 0x0B, 0x06, |
| 59 | 0x09, 0x01, |
| 60 | 0x0D, 0x41, |
| 61 | 0x16, 0x32, |
| 62 | 0x20, 0x0A, |
| 63 | 0x21, 0x17, |
| 64 | 0x24, 0x3e, |
| 65 | 0x26, 0xff, |
| 66 | 0x27, 0x10, |
| 67 | 0x28, 0x00, |
| 68 | 0x29, 0x00, |
| 69 | 0x2a, 0x10, |
| 70 | 0x2b, 0x00, |
| 71 | 0x2c, 0x10, |
| 72 | 0x2d, 0x00, |
| 73 | 0x48, 0xd4, |
| 74 | 0x49, 0x56, |
| 75 | 0x6b, 0x1e, |
| 76 | 0xc8, 0x02, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | 0xf9, 0x00, |
| 78 | 0xfa, 0x00, |
| 79 | 0xfb, 0x00, |
| 80 | 0xfc, 0x00, |
| 81 | 0xfd, 0x00, |
| 82 | }; |
| 83 | |
| 84 | static int cx22702_writereg (struct cx22702_state* state, u8 reg, u8 data) |
| 85 | { |
| 86 | int ret; |
| 87 | u8 buf [] = { reg, data }; |
| 88 | struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 }; |
| 89 | |
| 90 | ret = i2c_transfer(state->i2c, &msg, 1); |
| 91 | |
| 92 | if (ret != 1) |
| 93 | printk("%s: writereg error (reg == 0x%02x, val == 0x%02x, ret == %i)\n", |
| 94 | __FUNCTION__, reg, data, ret); |
| 95 | |
| 96 | return (ret != 1) ? -1 : 0; |
| 97 | } |
| 98 | |
| 99 | static u8 cx22702_readreg (struct cx22702_state* state, u8 reg) |
| 100 | { |
| 101 | int ret; |
| 102 | u8 b0 [] = { reg }; |
| 103 | u8 b1 [] = { 0 }; |
| 104 | |
| 105 | struct i2c_msg msg [] = { |
| 106 | { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 }, |
| 107 | { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } }; |
| 108 | |
| 109 | ret = i2c_transfer(state->i2c, msg, 2); |
| 110 | |
| 111 | if (ret != 2) |
| 112 | printk("%s: readreg error (ret == %i)\n", __FUNCTION__, ret); |
| 113 | |
| 114 | return b1[0]; |
| 115 | } |
| 116 | |
| 117 | static int cx22702_set_inversion (struct cx22702_state *state, int inversion) |
| 118 | { |
| 119 | u8 val; |
| 120 | |
| 121 | switch (inversion) { |
| 122 | |
| 123 | case INVERSION_AUTO: |
| 124 | return -EOPNOTSUPP; |
| 125 | |
| 126 | case INVERSION_ON: |
| 127 | val = cx22702_readreg (state, 0x0C); |
| 128 | return cx22702_writereg (state, 0x0C, val | 0x01); |
| 129 | |
| 130 | case INVERSION_OFF: |
| 131 | val = cx22702_readreg (state, 0x0C); |
| 132 | return cx22702_writereg (state, 0x0C, val & 0xfe); |
| 133 | |
| 134 | default: |
| 135 | return -EINVAL; |
| 136 | |
| 137 | } |
| 138 | |
| 139 | } |
| 140 | |
| 141 | /* Retrieve the demod settings */ |
| 142 | static int cx22702_get_tps (struct cx22702_state *state, struct dvb_ofdm_parameters *p) |
| 143 | { |
| 144 | u8 val; |
| 145 | |
| 146 | /* Make sure the TPS regs are valid */ |
| 147 | if (!(cx22702_readreg(state, 0x0A) & 0x20)) |
| 148 | return -EAGAIN; |
| 149 | |
| 150 | val = cx22702_readreg (state, 0x01); |
| 151 | switch( (val&0x18)>>3) { |
| 152 | case 0: p->constellation = QPSK; break; |
| 153 | case 1: p->constellation = QAM_16; break; |
| 154 | case 2: p->constellation = QAM_64; break; |
| 155 | } |
| 156 | switch( val&0x07 ) { |
| 157 | case 0: p->hierarchy_information = HIERARCHY_NONE; break; |
| 158 | case 1: p->hierarchy_information = HIERARCHY_1; break; |
| 159 | case 2: p->hierarchy_information = HIERARCHY_2; break; |
| 160 | case 3: p->hierarchy_information = HIERARCHY_4; break; |
| 161 | } |
| 162 | |
| 163 | |
| 164 | val = cx22702_readreg (state, 0x02); |
| 165 | switch( (val&0x38)>>3 ) { |
| 166 | case 0: p->code_rate_HP = FEC_1_2; break; |
| 167 | case 1: p->code_rate_HP = FEC_2_3; break; |
| 168 | case 2: p->code_rate_HP = FEC_3_4; break; |
| 169 | case 3: p->code_rate_HP = FEC_5_6; break; |
| 170 | case 4: p->code_rate_HP = FEC_7_8; break; |
| 171 | } |
| 172 | switch( val&0x07 ) { |
| 173 | case 0: p->code_rate_LP = FEC_1_2; break; |
| 174 | case 1: p->code_rate_LP = FEC_2_3; break; |
| 175 | case 2: p->code_rate_LP = FEC_3_4; break; |
| 176 | case 3: p->code_rate_LP = FEC_5_6; break; |
| 177 | case 4: p->code_rate_LP = FEC_7_8; break; |
| 178 | } |
| 179 | |
| 180 | |
| 181 | val = cx22702_readreg (state, 0x03); |
| 182 | switch( (val&0x0c)>>2 ) { |
| 183 | case 0: p->guard_interval = GUARD_INTERVAL_1_32; break; |
| 184 | case 1: p->guard_interval = GUARD_INTERVAL_1_16; break; |
| 185 | case 2: p->guard_interval = GUARD_INTERVAL_1_8; break; |
| 186 | case 3: p->guard_interval = GUARD_INTERVAL_1_4; break; |
| 187 | } |
| 188 | switch( val&0x03 ) { |
| 189 | case 0: p->transmission_mode = TRANSMISSION_MODE_2K; break; |
| 190 | case 1: p->transmission_mode = TRANSMISSION_MODE_8K; break; |
| 191 | } |
| 192 | |
| 193 | return 0; |
| 194 | } |
| 195 | |
Steven Toth | 611900c | 2006-01-09 15:25:12 -0200 | [diff] [blame] | 196 | static int cx22702_i2c_gate_ctrl(struct dvb_frontend* fe, int enable) |
| 197 | { |
| 198 | struct cx22702_state* state = fe->demodulator_priv; |
| 199 | dprintk ("%s(%d)\n", __FUNCTION__, enable); |
| 200 | if (enable) |
| 201 | return cx22702_writereg (state, 0x0D, cx22702_readreg(state, 0x0D) & 0xfe); |
| 202 | else |
| 203 | return cx22702_writereg (state, 0x0D, cx22702_readreg(state, 0x0D) | 1); |
| 204 | } |
| 205 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | /* Talk to the demod, set the FEC, GUARD, QAM settings etc */ |
| 207 | static int cx22702_set_tps (struct dvb_frontend* fe, struct dvb_frontend_parameters *p) |
| 208 | { |
| 209 | u8 val; |
Johannes Stezenbach | b874270 | 2005-05-16 21:54:31 -0700 | [diff] [blame] | 210 | struct cx22702_state* state = fe->demodulator_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
Patrick Boettcher | dea7486 | 2006-05-14 05:01:31 -0300 | [diff] [blame] | 212 | if (fe->ops.tuner_ops.set_params) { |
| 213 | fe->ops.tuner_ops.set_params(fe, p); |
| 214 | if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); |
Gerd Knorr | 9990d74 | 2005-05-01 08:59:20 -0700 | [diff] [blame] | 215 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | |
| 217 | /* set inversion */ |
| 218 | cx22702_set_inversion (state, p->inversion); |
| 219 | |
| 220 | /* set bandwidth */ |
| 221 | switch(p->u.ofdm.bandwidth) { |
| 222 | case BANDWIDTH_6_MHZ: |
| 223 | cx22702_writereg(state, 0x0C, (cx22702_readreg(state, 0x0C) & 0xcf) | 0x20 ); |
| 224 | break; |
| 225 | case BANDWIDTH_7_MHZ: |
| 226 | cx22702_writereg(state, 0x0C, (cx22702_readreg(state, 0x0C) & 0xcf) | 0x10 ); |
| 227 | break; |
| 228 | case BANDWIDTH_8_MHZ: |
| 229 | cx22702_writereg(state, 0x0C, cx22702_readreg(state, 0x0C) &0xcf ); |
| 230 | break; |
| 231 | default: |
| 232 | dprintk ("%s: invalid bandwidth\n",__FUNCTION__); |
| 233 | return -EINVAL; |
| 234 | } |
| 235 | |
| 236 | |
| 237 | p->u.ofdm.code_rate_LP = FEC_AUTO; //temp hack as manual not working |
| 238 | |
| 239 | /* use auto configuration? */ |
| 240 | if((p->u.ofdm.hierarchy_information==HIERARCHY_AUTO) || |
| 241 | (p->u.ofdm.constellation==QAM_AUTO) || |
| 242 | (p->u.ofdm.code_rate_HP==FEC_AUTO) || |
| 243 | (p->u.ofdm.code_rate_LP==FEC_AUTO) || |
| 244 | (p->u.ofdm.guard_interval==GUARD_INTERVAL_AUTO) || |
| 245 | (p->u.ofdm.transmission_mode==TRANSMISSION_MODE_AUTO) ) { |
| 246 | |
| 247 | /* TPS Source - use hardware driven values */ |
| 248 | cx22702_writereg(state, 0x06, 0x10); |
| 249 | cx22702_writereg(state, 0x07, 0x9); |
| 250 | cx22702_writereg(state, 0x08, 0xC1); |
| 251 | cx22702_writereg(state, 0x0B, cx22702_readreg(state, 0x0B) & 0xfc ); |
| 252 | cx22702_writereg(state, 0x0C, (cx22702_readreg(state, 0x0C) & 0xBF) | 0x40 ); |
| 253 | cx22702_writereg(state, 0x00, 0x01); /* Begin aquisition */ |
Patrick Boettcher | f46dbb0 | 2005-07-07 17:57:44 -0700 | [diff] [blame] | 254 | dprintk("%s: Autodetecting\n",__FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | return 0; |
| 256 | } |
| 257 | |
| 258 | /* manually programmed values */ |
| 259 | val=0; |
| 260 | switch(p->u.ofdm.constellation) { |
| 261 | case QPSK: val = (val&0xe7); break; |
| 262 | case QAM_16: val = (val&0xe7)|0x08; break; |
| 263 | case QAM_64: val = (val&0xe7)|0x10; break; |
| 264 | default: |
| 265 | dprintk ("%s: invalid constellation\n",__FUNCTION__); |
| 266 | return -EINVAL; |
| 267 | } |
| 268 | switch(p->u.ofdm.hierarchy_information) { |
| 269 | case HIERARCHY_NONE: val = (val&0xf8); break; |
| 270 | case HIERARCHY_1: val = (val&0xf8)|1; break; |
| 271 | case HIERARCHY_2: val = (val&0xf8)|2; break; |
| 272 | case HIERARCHY_4: val = (val&0xf8)|3; break; |
| 273 | default: |
| 274 | dprintk ("%s: invalid hierarchy\n",__FUNCTION__); |
| 275 | return -EINVAL; |
| 276 | } |
| 277 | cx22702_writereg (state, 0x06, val); |
| 278 | |
| 279 | val=0; |
| 280 | switch(p->u.ofdm.code_rate_HP) { |
| 281 | case FEC_NONE: |
| 282 | case FEC_1_2: val = (val&0xc7); break; |
| 283 | case FEC_2_3: val = (val&0xc7)|0x08; break; |
| 284 | case FEC_3_4: val = (val&0xc7)|0x10; break; |
| 285 | case FEC_5_6: val = (val&0xc7)|0x18; break; |
| 286 | case FEC_7_8: val = (val&0xc7)|0x20; break; |
| 287 | default: |
| 288 | dprintk ("%s: invalid code_rate_HP\n",__FUNCTION__); |
| 289 | return -EINVAL; |
| 290 | } |
| 291 | switch(p->u.ofdm.code_rate_LP) { |
| 292 | case FEC_NONE: |
| 293 | case FEC_1_2: val = (val&0xf8); break; |
| 294 | case FEC_2_3: val = (val&0xf8)|1; break; |
| 295 | case FEC_3_4: val = (val&0xf8)|2; break; |
| 296 | case FEC_5_6: val = (val&0xf8)|3; break; |
| 297 | case FEC_7_8: val = (val&0xf8)|4; break; |
| 298 | default: |
| 299 | dprintk ("%s: invalid code_rate_LP\n",__FUNCTION__); |
| 300 | return -EINVAL; |
| 301 | } |
| 302 | cx22702_writereg (state, 0x07, val); |
| 303 | |
| 304 | val=0; |
| 305 | switch(p->u.ofdm.guard_interval) { |
| 306 | case GUARD_INTERVAL_1_32: val = (val&0xf3); break; |
| 307 | case GUARD_INTERVAL_1_16: val = (val&0xf3)|0x04; break; |
| 308 | case GUARD_INTERVAL_1_8: val = (val&0xf3)|0x08; break; |
| 309 | case GUARD_INTERVAL_1_4: val = (val&0xf3)|0x0c; break; |
| 310 | default: |
| 311 | dprintk ("%s: invalid guard_interval\n",__FUNCTION__); |
| 312 | return -EINVAL; |
| 313 | } |
| 314 | switch(p->u.ofdm.transmission_mode) { |
| 315 | case TRANSMISSION_MODE_2K: val = (val&0xfc); break; |
| 316 | case TRANSMISSION_MODE_8K: val = (val&0xfc)|1; break; |
| 317 | default: |
| 318 | dprintk ("%s: invalid transmission_mode\n",__FUNCTION__); |
| 319 | return -EINVAL; |
| 320 | } |
| 321 | cx22702_writereg(state, 0x08, val); |
| 322 | cx22702_writereg(state, 0x0B, (cx22702_readreg(state, 0x0B) & 0xfc) | 0x02 ); |
| 323 | cx22702_writereg(state, 0x0C, (cx22702_readreg(state, 0x0C) & 0xBF) | 0x40 ); |
| 324 | |
| 325 | /* Begin channel aquisition */ |
| 326 | cx22702_writereg(state, 0x00, 0x01); |
| 327 | |
| 328 | return 0; |
| 329 | } |
| 330 | |
| 331 | /* Reset the demod hardware and reset all of the configuration registers |
| 332 | to a default state. */ |
| 333 | static int cx22702_init (struct dvb_frontend* fe) |
| 334 | { |
| 335 | int i; |
Johannes Stezenbach | b874270 | 2005-05-16 21:54:31 -0700 | [diff] [blame] | 336 | struct cx22702_state* state = fe->demodulator_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
| 338 | cx22702_writereg (state, 0x00, 0x02); |
| 339 | |
| 340 | msleep(10); |
| 341 | |
| 342 | for (i=0; i<sizeof(init_tab); i+=2) |
| 343 | cx22702_writereg (state, init_tab[i], init_tab[i+1]); |
| 344 | |
Patrick Boettcher | f46dbb0 | 2005-07-07 17:57:44 -0700 | [diff] [blame] | 345 | cx22702_writereg (state, 0xf8, (state->config->output_mode << 1) & 0x02); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | |
Steven Toth | 611900c | 2006-01-09 15:25:12 -0200 | [diff] [blame] | 347 | cx22702_i2c_gate_ctrl(fe, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | static int cx22702_read_status(struct dvb_frontend* fe, fe_status_t* status) |
| 353 | { |
Johannes Stezenbach | b874270 | 2005-05-16 21:54:31 -0700 | [diff] [blame] | 354 | struct cx22702_state* state = fe->demodulator_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | u8 reg0A; |
| 356 | u8 reg23; |
| 357 | |
| 358 | *status = 0; |
| 359 | |
| 360 | reg0A = cx22702_readreg (state, 0x0A); |
| 361 | reg23 = cx22702_readreg (state, 0x23); |
| 362 | |
| 363 | dprintk ("%s: status demod=0x%02x agc=0x%02x\n" |
| 364 | ,__FUNCTION__,reg0A,reg23); |
| 365 | |
| 366 | if(reg0A & 0x10) { |
| 367 | *status |= FE_HAS_LOCK; |
| 368 | *status |= FE_HAS_VITERBI; |
| 369 | *status |= FE_HAS_SYNC; |
| 370 | } |
| 371 | |
| 372 | if(reg0A & 0x20) |
| 373 | *status |= FE_HAS_CARRIER; |
| 374 | |
| 375 | if(reg23 < 0xf0) |
| 376 | *status |= FE_HAS_SIGNAL; |
| 377 | |
| 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | static int cx22702_read_ber(struct dvb_frontend* fe, u32* ber) |
| 382 | { |
Johannes Stezenbach | b874270 | 2005-05-16 21:54:31 -0700 | [diff] [blame] | 383 | struct cx22702_state* state = fe->demodulator_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | |
| 385 | if(cx22702_readreg (state, 0xE4) & 0x02) { |
| 386 | /* Realtime statistics */ |
| 387 | *ber = (cx22702_readreg (state, 0xDE) & 0x7F) << 7 |
| 388 | | (cx22702_readreg (state, 0xDF)&0x7F); |
| 389 | } else { |
| 390 | /* Averagtine statistics */ |
| 391 | *ber = (cx22702_readreg (state, 0xDE) & 0x7F) << 7 |
| 392 | | cx22702_readreg (state, 0xDF); |
| 393 | } |
| 394 | |
| 395 | return 0; |
| 396 | } |
| 397 | |
| 398 | static int cx22702_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength) |
| 399 | { |
Johannes Stezenbach | b874270 | 2005-05-16 21:54:31 -0700 | [diff] [blame] | 400 | struct cx22702_state* state = fe->demodulator_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
| 402 | *signal_strength = cx22702_readreg (state, 0x23); |
| 403 | |
| 404 | return 0; |
| 405 | } |
| 406 | |
| 407 | static int cx22702_read_snr(struct dvb_frontend* fe, u16* snr) |
| 408 | { |
Johannes Stezenbach | b874270 | 2005-05-16 21:54:31 -0700 | [diff] [blame] | 409 | struct cx22702_state* state = fe->demodulator_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | |
| 411 | u16 rs_ber=0; |
| 412 | if(cx22702_readreg (state, 0xE4) & 0x02) { |
| 413 | /* Realtime statistics */ |
| 414 | rs_ber = (cx22702_readreg (state, 0xDE) & 0x7F) << 7 |
| 415 | | (cx22702_readreg (state, 0xDF)& 0x7F); |
| 416 | } else { |
| 417 | /* Averagine statistics */ |
| 418 | rs_ber = (cx22702_readreg (state, 0xDE) & 0x7F) << 8 |
| 419 | | cx22702_readreg (state, 0xDF); |
| 420 | } |
| 421 | *snr = ~rs_ber; |
| 422 | |
| 423 | return 0; |
| 424 | } |
| 425 | |
| 426 | static int cx22702_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) |
| 427 | { |
Johannes Stezenbach | b874270 | 2005-05-16 21:54:31 -0700 | [diff] [blame] | 428 | struct cx22702_state* state = fe->demodulator_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
| 430 | u8 _ucblocks; |
| 431 | |
| 432 | /* RS Uncorrectable Packet Count then reset */ |
| 433 | _ucblocks = cx22702_readreg (state, 0xE3); |
Patrick Boettcher | f46dbb0 | 2005-07-07 17:57:44 -0700 | [diff] [blame] | 434 | if (state->prevUCBlocks < _ucblocks) |
| 435 | *ucblocks = (_ucblocks - state->prevUCBlocks); |
| 436 | else |
| 437 | *ucblocks = state->prevUCBlocks - _ucblocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | state->prevUCBlocks = _ucblocks; |
| 439 | |
| 440 | return 0; |
| 441 | } |
| 442 | |
| 443 | static int cx22702_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p) |
| 444 | { |
Johannes Stezenbach | b874270 | 2005-05-16 21:54:31 -0700 | [diff] [blame] | 445 | struct cx22702_state* state = fe->demodulator_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | |
| 447 | u8 reg0C = cx22702_readreg (state, 0x0C); |
| 448 | |
| 449 | p->inversion = reg0C & 0x1 ? INVERSION_ON : INVERSION_OFF; |
| 450 | return cx22702_get_tps (state, &p->u.ofdm); |
| 451 | } |
| 452 | |
Patrick Boettcher | f46dbb0 | 2005-07-07 17:57:44 -0700 | [diff] [blame] | 453 | static int cx22702_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune) |
| 454 | { |
| 455 | tune->min_delay_ms = 1000; |
| 456 | return 0; |
| 457 | } |
| 458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | static void cx22702_release(struct dvb_frontend* fe) |
| 460 | { |
Johannes Stezenbach | b874270 | 2005-05-16 21:54:31 -0700 | [diff] [blame] | 461 | struct cx22702_state* state = fe->demodulator_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | kfree(state); |
| 463 | } |
| 464 | |
| 465 | static struct dvb_frontend_ops cx22702_ops; |
| 466 | |
| 467 | struct dvb_frontend* cx22702_attach(const struct cx22702_config* config, |
| 468 | struct i2c_adapter* i2c) |
| 469 | { |
| 470 | struct cx22702_state* state = NULL; |
| 471 | |
| 472 | /* allocate memory for the internal state */ |
Johannes Stezenbach | b874270 | 2005-05-16 21:54:31 -0700 | [diff] [blame] | 473 | state = kmalloc(sizeof(struct cx22702_state), GFP_KERNEL); |
Patrick Boettcher | f46dbb0 | 2005-07-07 17:57:44 -0700 | [diff] [blame] | 474 | if (state == NULL) |
| 475 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
| 477 | /* setup the state */ |
| 478 | state->config = config; |
| 479 | state->i2c = i2c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | state->prevUCBlocks = 0; |
| 481 | |
| 482 | /* check if the demod is there */ |
Patrick Boettcher | f46dbb0 | 2005-07-07 17:57:44 -0700 | [diff] [blame] | 483 | if (cx22702_readreg(state, 0x1f) != 0x3) |
| 484 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | |
| 486 | /* create dvb_frontend */ |
Patrick Boettcher | dea7486 | 2006-05-14 05:01:31 -0300 | [diff] [blame] | 487 | memcpy(&state->frontend.ops, &cx22702_ops, sizeof(struct dvb_frontend_ops)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | state->frontend.demodulator_priv = state; |
| 489 | return &state->frontend; |
| 490 | |
| 491 | error: |
| 492 | kfree(state); |
| 493 | return NULL; |
| 494 | } |
| 495 | |
| 496 | static struct dvb_frontend_ops cx22702_ops = { |
| 497 | |
| 498 | .info = { |
| 499 | .name = "Conexant CX22702 DVB-T", |
| 500 | .type = FE_OFDM, |
| 501 | .frequency_min = 177000000, |
| 502 | .frequency_max = 858000000, |
| 503 | .frequency_stepsize = 166666, |
| 504 | .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | |
| 505 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | |
| 506 | FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO | |
| 507 | FE_CAN_HIERARCHY_AUTO | FE_CAN_GUARD_INTERVAL_AUTO | |
| 508 | FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_RECOVER |
| 509 | }, |
| 510 | |
| 511 | .release = cx22702_release, |
| 512 | |
| 513 | .init = cx22702_init, |
Andrew de Quincey | 0244422 | 2006-04-18 17:47:09 -0300 | [diff] [blame] | 514 | .i2c_gate_ctrl = cx22702_i2c_gate_ctrl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | |
| 516 | .set_frontend = cx22702_set_tps, |
| 517 | .get_frontend = cx22702_get_frontend, |
Patrick Boettcher | f46dbb0 | 2005-07-07 17:57:44 -0700 | [diff] [blame] | 518 | .get_tune_settings = cx22702_get_tune_settings, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | |
| 520 | .read_status = cx22702_read_status, |
| 521 | .read_ber = cx22702_read_ber, |
| 522 | .read_signal_strength = cx22702_read_signal_strength, |
| 523 | .read_snr = cx22702_read_snr, |
| 524 | .read_ucblocks = cx22702_read_ucblocks, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | }; |
| 526 | |
| 527 | module_param(debug, int, 0644); |
| 528 | MODULE_PARM_DESC(debug, "Enable verbose debug messages"); |
| 529 | |
| 530 | MODULE_DESCRIPTION("Conexant CX22702 DVB-T Demodulator driver"); |
| 531 | MODULE_AUTHOR("Steven Toth"); |
| 532 | MODULE_LICENSE("GPL"); |
| 533 | |
| 534 | EXPORT_SYMBOL(cx22702_attach); |