/* Auvitek AU8522 QAM/8VSB demodulator driver Copyright (C) 2008 Steven Toth <stoth@linuxtv.org> This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/module.h> #include <linux/string.h> #include <linux/delay.h> #include "dvb_frontend.h" #include "au8522.h" #include "au8522_priv.h" static int debug; static int zv_mode = 1; /* default to on */ #define dprintk(arg...)\ do { if (debug)\ printk(arg);\ } while (0) struct mse2snr_tab { u16 val; u16 data; }; /* VSB SNR lookup table */ static struct mse2snr_tab vsb_mse2snr_tab[] = { { 0, 270 }, { 2, 250 }, { 3, 240 }, { 5, 230 }, { 7, 220 }, { 9, 210 }, { 12, 200 }, { 13, 195 }, { 15, 190 }, { 17, 185 }, { 19, 180 }, { 21, 175 }, { 24, 170 }, { 27, 165 }, { 31, 160 }, { 32, 158 }, { 33, 156 }, { 36, 152 }, { 37, 150 }, { 39, 148 }, { 40, 146 }, { 41, 144 }, { 43, 142 }, { 44, 140 }, { 48, 135 }, { 50, 130 }, { 43, 142 }, { 53, 125 }, { 56, 120 }, { 256, 115 }, }; /* QAM64 SNR lookup table */ static struct mse2snr_tab qam64_mse2snr_tab[] = { { 15, 0 }, { 16, 290 }, { 17, 288 }, { 18, 286 }, { 19, 284 }, { 20, 282 }, { 21, 281 }, { 22, 279 }, { 23, 277 }, { 24, 275 }, { 25, 273 }, { 26, 271 }, { 27, 269 }, { 28, 268 }, { 29, 266 }, { 30, 264 }, { 31, 262 }, { 32, 260 }, { 33, 259 }, { 34, 258 }, { 35, 256 }, { 36, 255 }, { 37, 254 }, { 38, 252 }, { 39, 251 }, { 40, 250 }, { 41, 249 }, { 42, 248 }, { 43, 246 }, { 44, 245 }, { 45, 244 }, { 46, 242 }, { 47, 241 }, { 48, 240 }, { 50, 239 }, { 51, 238 }, { 53, 237 }, { 54, 236 }, { 56, 235 }, { 57, 234 }, { 59, 233 }, { 60, 232 }, { 62, 231 }, { 63, 230 }, { 65, 229 }, { 67, 228 }, { 68, 227 }, { 70, 226 }, { 71, 225 }, { 73, 224 }, { 74, 223 }, { 76, 222 }, { 78, 221 }, { 80, 220 }, { 82, 219 }, { 85, 218 }, { 88, 217 }, { 90, 216 }, { 92, 215 }, { 93, 214 }, { 94, 212 }, { 95, 211 }, { 97, 210 }, { 99, 209 }, { 101, 208 }, { 102, 207 }, { 104, 206 }, { 107, 205 }, { 111, 204 }, { 114, 203 }, { 118, 202 }, { 122, 201 }, { 125, 200 }, { 128, 199 }, { 130, 198 }, { 132, 197 }, { 256, 190 }, }; /* QAM256 SNR lookup table */ static struct mse2snr_tab qam256_mse2snr_tab[] = { { 15, 0 }, { 16, 400 }, { 17, 398 }, { 18, 396 }, { 19, 394 }, { 20, 392 }, { 21, 390 }, { 22, 388 }, { 23, 386 }, { 24, 384 }, { 25, 382 }, { 26, 380 }, { 27, 379 }, { 28, 378 }, { 29, 377 }, { 30, 376 }, { 31, 375 }, { 32, 374 }, { 33, 373 }, { 34, 372 }, { 35, 371 }, { 36, 370 }, { 37, 362 }, { 38, 354 }, { 39, 346 }, { 40, 338 }, { 41, 330 }, { 42, 328 }, { 43, 326 }, { 44, 324 }, { 45, 322 }, { 46, 320 }, { 47, 319 }, { 48, 318 }, { 49, 317 }, { 50, 316 }, { 51, 315 }, { 52, 314 }, { 53, 313 }, { 54, 312 }, { 55, 311 }, { 56, 310 }, { 57, 308 }, { 58, 306 }, { 59, 304 }, { 60, 302 }, { 61, 300 }, { 62, 298 }, { 65, 295 }, { 68, 294 }, { 70, 293 }, { 73, 292 }, { 76, 291 }, { 78, 290 }, { 79, 289 }, { 81, 288 }, { 82, 287 }, { 83, 286 }, { 84, 285 }, { 85, 284 }, { 86, 283 }, { 88, 282 }, { 89, 281 }, { 256, 280 }, }; static int au8522_mse2snr_lookup(struct mse2snr_tab *tab, int sz, int mse, u16 *snr) { int i, ret = -EINVAL; dprintk("%s()\n", __func__); for (i = 0; i < sz; i++) { if (mse < tab[i].val) { *snr = tab[i].data; ret = 0; break; } } dprintk("%s() snr=%d\n", __func__, *snr); return ret; } static int au8522_set_if(struct dvb_frontend *fe, enum au8522_if_freq if_freq) { struct au8522_state *state = fe->demodulator_priv; u8 r0b5, r0b6, r0b7; char *ifmhz; switch (if_freq) { case AU8522_IF_3_25MHZ: ifmhz = "3.25"; r0b5 = 0x00; r0b6 = 0x3d; r0b7 = 0xa0; break; case AU8522_IF_4MHZ: ifmhz = "4.00"; r0b5 = 0x00; r0b6 = 0x4b; r0b7 = 0xd9; break; case AU8522_IF_6MHZ: ifmhz = "6.00"; r0b5 = 0xfb; r0b6 = 0x8e; r0b7 = 0x39; break; default: dprintk("%s() IF Frequency not supported\n", __func__); return -EINVAL; } dprintk("%s() %s MHz\n", __func__, ifmhz); au8522_writereg(state, 0x80b5, r0b5); au8522_writereg(state, 0x80b6, r0b6); au8522_writereg(state, 0x80b7, r0b7); return 0; } /* VSB Modulation table */ static struct { u16 reg; u16 data; } VSB_mod_tab[] = { { 0x8090, 0x84 }, { 0x4092, 0x11 }, { 0x2005, 0x00 }, { 0x8091, 0x80 }, { 0x80a3, 0x0c }, { 0x80a4, 0xe8 }, { 0x8081, 0xc4 }, { 0x80a5, 0x40 }, { 0x80a7, 0x40 }, { 0x80a6, 0x67 }, { 0x8262, 0x20 }, { 0x821c, 0x30 }, { 0x80d8, 0x1a }, { 0x8227, 0xa0 }, { 0x8121, 0xff }, { 0x80a8, 0xf0 }, { 0x80a9, 0x05 }, { 0x80aa, 0x77 }, { 0x80ab, 0xf0 }, { 0x80ac, 0x05 }, { 0x80ad, 0x77 }, { 0x80ae, 0x41 }, { 0x80af, 0x66 }, { 0x821b, 0xcc }, { 0x821d, 0x80 }, { 0x80a4, 0xe8 }, { 0x8231, 0x13 }, }; /* QAM64 Modulation table */ static struct { u16 reg; u16 data; } QAM64_mod_tab[] = { { 0x00a3, 0x09 }, { 0x00a4, 0x00 }, { 0x0081, 0xc4 }, { 0x00a5, 0x40 }, { 0x00aa, 0x77 }, { 0x00ad, 0x77 }, { 0x00a6, 0x67 }, { 0x0262, 0x20 }, { 0x021c, 0x30 }, { 0x00b8, 0x3e }, { 0x00b9, 0xf0 }, { 0x00ba, 0x01 }, { 0x00bb, 0x18 }, { 0x00bc, 0x50 }, { 0x00bd, 0x00 }, { 0x00be, 0xea }, { 0x00bf, 0xef }, { 0x00c0, 0xfc }, { 0x00c1, 0xbd }, { 0x00c2, 0x1f }, { 0x00c3, 0xfc }, { 0x00c4, 0xdd }, { 0x00c5, 0xaf }, { 0x00c6, 0x00 }, { 0x00c7, 0x38 }, { 0x00c8, 0x30 }, { 0x00c9, 0x05 }, { 0x00ca, 0x4a }, { 0x00cb, 0xd0 }, { 0x00cc, 0x01 }, { 0x00cd, 0xd9 }, { 0x00ce, 0x6f }, { 0x00cf, 0xf9 }, { 0x00d0, 0x70 }, { 0x00d1, 0xdf }, { 0x00d2, 0xf7 }, { 0x00d3, 0xc2 }, { 0x00d4, 0xdf }, { 0x00d5, 0x02 }, { 0x00d6, 0x9a }, { 0x00d7, 0xd0 }, { 0x0250, 0x0d }, { 0x0251, 0xcd }, { 0x0252, 0xe0 }, { 0x0253, 0x05 }, { 0x0254, 0xa7 }, { 0x0255, 0xff }, { 0x0256, 0xed }, { 0x0257, 0x5b }, { 0x0258, 0xae }, { 0x0259, 0xe6 }, { 0x025a, 0x3d }, { 0x025b, 0x0f }, { 0x025c, 0x0d }, { 0x025d, 0xea }, { 0x025e, 0xf2 }, { 0x025f, 0x51 }, { 0x0260, 0xf5 }, { 0x0261, 0x06 }, { 0x021a, 0x00 }, { 0x0546, 0x40 }, { 0x0210, 0xc7 }, { 0x0211, 0xaa }, { 0x0212, 0xab }, { 0x0213, 0x02 }, { 0x0502, 0x00 }, { 0x0121, 0x04 }, { 0x0122, 0x04 }, { 0x052e, 0x10 }, { 0x00a4, 0xca }, { 0x00a7, 0x40 }, { 0x0526, 0x01 }, }; /* QAM256 Modulation table */ static struct { u16 reg; u16 data; } QAM256_mod_tab[] = { { 0x80a3, 0x09 }, { 0x80a4, 0x00 }, { 0x8081, 0xc4 }, { 0x80a5, 0x40 }, { 0x80aa, 0x77 }, { 0x80ad, 0x77 }, { 0x80a6, 0x67 }, { 0x8262, 0x20 }, { 0x821c, 0x30 }, { 0x80b8, 0x3e }, { 0x80b9, 0xf0 }, { 0x80ba, 0x01 }, { 0x80bb, 0x18 }, { 0x80bc, 0x50 }, { 0x80bd, 0x00 }, { 0x80be, 0xea }, { 0x80bf, 0xef }, { 0x80c0, 0xfc }, { 0x80c1, 0xbd }, { 0x80c2, 0x1f }, { 0x80c3, 0xfc }, { 0x80c4, 0xdd }, { 0x80c5, 0xaf }, { 0x80c6, 0x00 }, { 0x80c7, 0x38 }, { 0x80c8, 0x30 }, { 0x80c9, 0x05 }, { 0x80ca, 0x4a }, { 0x80cb, 0xd0 }, { 0x80cc, 0x01 }, { 0x80cd, 0xd9 }, { 0x80ce, 0x6f }, { 0x80cf, 0xf9 }, { 0x80d0, 0x70 }, { 0x80d1, 0xdf }, { 0x80d2, 0xf7 }, { 0x80d3, 0xc2 }, { 0x80d4, 0xdf }, { 0x80d5, 0x02 }, { 0x80d6, 0x9a }, { 0x80d7, 0xd0 }, { 0x8250, 0x0d }, { 0x8251, 0xcd }, { 0x8252, 0xe0 }, { 0x8253, 0x05 }, { 0x8254, 0xa7 }, { 0x8255, 0xff }, { 0x8256, 0xed }, { 0x8257, 0x5b }, { 0x8258, 0xae }, { 0x8259, 0xe6 }, { 0x825a, 0x3d }, { 0x825b, 0x0f }, { 0x825c, 0x0d }, { 0x825d, 0xea }, { 0x825e, 0xf2 }, { 0x825f, 0x51 }, { 0x8260, 0xf5 }, { 0x8261, 0x06 }, { 0x821a, 0x00 }, { 0x8546, 0x40 }, { 0x8210, 0x26 }, { 0x8211, 0xf6 }, { 0x8212, 0x84 }, { 0x8213, 0x02 }, { 0x8502, 0x01 }, { 0x8121, 0x04 }, { 0x8122, 0x04 }, { 0x852e, 0x10 }, { 0x80a4, 0xca }, { 0x80a7, 0x40 }, { 0x8526, 0x01 }, }; static struct { u16 reg; u16 data; } QAM256_mod_tab_zv_mode[] = { { 0x80a3, 0x09 }, { 0x80a4, 0x00 }, { 0x8081, 0xc4 }, { 0x80a5, 0x40 }, { 0x80b5, 0xfb }, { 0x80b6, 0x8e }, { 0x80b7, 0x39 }, { 0x80aa, 0x77 }, { 0x80ad, 0x77 }, { 0x80a6, 0x67 }, { 0x8262, 0x20 }, { 0x821c, 0x30 }, { 0x80b8, 0x3e }, { 0x80b9, 0xf0 }, { 0x80ba, 0x01 }, { 0x80bb, 0x18 }, { 0x80bc, 0x50 }, { 0x80bd, 0x00 }, { 0x80be, 0xea }, { 0x80bf, 0xef }, { 0x80c0, 0xfc }, { 0x80c1, 0xbd }, { 0x80c2, 0x1f }, { 0x80c3, 0xfc }, { 0x80c4, 0xdd }, { 0x80c5, 0xaf }, { 0x80c6, 0x00 }, { 0x80c7, 0x38 }, { 0x80c8, 0x30 }, { 0x80c9, 0x05 }, { 0x80ca, 0x4a }, { 0x80cb, 0xd0 }, { 0x80cc, 0x01 }, { 0x80cd, 0xd9 }, { 0x80ce, 0x6f }, { 0x80cf, 0xf9 }, { 0x80d0, 0x70 }, { 0x80d1, 0xdf }, { 0x80d2, 0xf7 }, { 0x80d3, 0xc2 }, { 0x80d4, 0xdf }, { 0x80d5, 0x02 }, { 0x80d6, 0x9a }, { 0x80d7, 0xd0 }, { 0x8250, 0x0d }, { 0x8251, 0xcd }, { 0x8252, 0xe0 }, { 0x8253, 0x05 }, { 0x8254, 0xa7 }, { 0x8255, 0xff }, { 0x8256, 0xed }, { 0x8257, 0x5b }, { 0x8258, 0xae }, { 0x8259, 0xe6 }, { 0x825a, 0x3d }, { 0x825b, 0x0f }, { 0x825c, 0x0d }, { 0x825d, 0xea }, { 0x825e, 0xf2 }, { 0x825f, 0x51 }, { 0x8260, 0xf5 }, { 0x8261, 0x06 }, { 0x821a, 0x01 }, { 0x8546, 0x40 }, { 0x8210, 0x26 }, { 0x8211, 0xf6 }, { 0x8212, 0x84 }, { 0x8213, 0x02 }, { 0x8502, 0x01 }, { 0x8121, 0x04 }, { 0x8122, 0x04 }, { 0x852e, 0x10 }, { 0x80a4, 0xca }, { 0x80a7, 0x40 }, { 0x8526, 0x01 }, }; static int au8522_enable_modulation(struct dvb_frontend *fe, enum fe_modulation m) { struct au8522_state *state = fe->demodulator_priv; int i; dprintk("%s(0x%08x)\n", __func__, m); switch (m) { case VSB_8: dprintk("%s() VSB_8\n", __func__); for (i = 0; i < ARRAY_SIZE(VSB_mod_tab); i++) au8522_writereg(state, VSB_mod_tab[i].reg, VSB_mod_tab[i].data); au8522_set_if(fe, state->config.vsb_if); break; case QAM_64: dprintk("%s() QAM 64\n", __func__); for (i = 0; i < ARRAY_SIZE(QAM64_mod_tab); i++) au8522_writereg(state, QAM64_mod_tab[i].reg, QAM64_mod_tab[i].data); au8522_set_if(fe, state->config.qam_if); break; case QAM_256: if (zv_mode) { dprintk("%s() QAM 256 (zv_mode)\n", __func__); for (i = 0; i < ARRAY_SIZE(QAM256_mod_tab_zv_mode); i++) au8522_writereg(state, QAM256_mod_tab_zv_mode[i].reg, QAM256_mod_tab_zv_mode[i].data); au8522_set_if(fe, state->config.qam_if); msleep(100); au8522_writereg(state, 0x821a, 0x00); } else { dprintk("%s() QAM 256\n", __func__); for (i = 0; i < ARRAY_SIZE(QAM256_mod_tab); i++) au8522_writereg(state, QAM256_mod_tab[i].reg, QAM256_mod_tab[i].data); au8522_set_if(fe, state->config.qam_if); } break; default: dprintk("%s() Invalid modulation\n", __func__); return -EINVAL; } state->current_modulation = m; return 0; } /* Talk to the demod, set the FEC, GUARD, QAM settings etc */ static int au8522_set_frontend(struct dvb_frontend *fe) { struct dtv_frontend_properties *c = &fe->dtv_property_cache; struct au8522_state *state = fe->demodulator_priv; int ret = -EINVAL; dprintk("%s(frequency=%d)\n", __func__, c->frequency); if ((state->current_frequency == c->frequency) && (state->current_modulation == c->modulation)) return 0; if (fe->ops.tuner_ops.set_params) { if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); ret = fe->ops.tuner_ops.set_params(fe); if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); } if (ret < 0) return ret; /* Allow the tuner to settle */ if (zv_mode) { dprintk("%s() increase tuner settling time for zv_mode\n", __func__); msleep(250); } else msleep(100); au8522_enable_modulation(fe, c->modulation); state->current_frequency = c->frequency; return 0; } static int au8522_read_status(struct dvb_frontend *fe, enum fe_status *status) { struct au8522_state *state = fe->demodulator_priv; u8 reg; u32 tuner_status = 0; *status = 0; if (state->current_modulation == VSB_8) { dprintk("%s() Checking VSB_8\n", __func__); reg = au8522_readreg(state, 0x4088); if ((reg & 0x03) == 0x03) *status |= FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI; } else { dprintk("%s() Checking QAM\n", __func__); reg = au8522_readreg(state, 0x4541); if (reg & 0x80) *status |= FE_HAS_VITERBI; if (reg & 0x20) *status |= FE_HAS_LOCK | FE_HAS_SYNC; } switch (state->config.status_mode) { case AU8522_DEMODLOCKING: dprintk("%s() DEMODLOCKING\n", __func__); if (*status & FE_HAS_VITERBI) *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL; break; case AU8522_TUNERLOCKING: /* Get the tuner status */ dprintk("%s() TUNERLOCKING\n", __func__); if (fe->ops.tuner_ops.get_status) { if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); fe->ops.tuner_ops.get_status(fe, &tuner_status); if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); } if (tuner_status) *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL; break; } state->fe_status = *status; if (*status & FE_HAS_LOCK) /* turn on LED, if it isn't on already */ au8522_led_ctrl(state, -1); else /* turn off LED */ au8522_led_ctrl(state, 0); dprintk("%s() status 0x%08x\n", __func__, *status); return 0; } static int au8522_led_status(struct au8522_state *state, const u16 *snr) { struct au8522_led_config *led_config = state->config.led_cfg; int led; u16 strong; /* bail out if we can't control an LED */ if (!led_config) return 0; if (0 == (state->fe_status & FE_HAS_LOCK)) return au8522_led_ctrl(state, 0); else if (state->current_modulation == QAM_256) strong = led_config->qam256_strong; else if (state->current_modulation == QAM_64) strong = led_config->qam64_strong; else /* (state->current_modulation == VSB_8) */ strong = led_config->vsb8_strong; if (*snr >= strong) led = 2; else led = 1; if ((state->led_state) && (((strong < *snr) ? (*snr - strong) : (strong - *snr)) <= 10)) /* snr didn't change enough to bother * changing the color of the led */ return 0; return au8522_led_ctrl(state, led); } static int au8522_read_snr(struct dvb_frontend *fe, u16 *snr) { struct au8522_state *state = fe->demodulator_priv; int ret = -EINVAL; dprintk("%s()\n", __func__); if (state->current_modulation == QAM_256) ret = au8522_mse2snr_lookup(qam256_mse2snr_tab, ARRAY_SIZE(qam256_mse2snr_tab), au8522_readreg(state, 0x4522), snr); else if (state->current_modulation == QAM_64) ret = au8522_mse2snr_lookup(qam64_mse2snr_tab, ARRAY_SIZE(qam64_mse2snr_tab), au8522_readreg(state, 0x4522), snr); else /* VSB_8 */ ret = au8522_mse2snr_lookup(vsb_mse2snr_tab, ARRAY_SIZE(vsb_mse2snr_tab), au8522_readreg(state, 0x4311), snr); if (state->config.led_cfg) au8522_led_status(state, snr); return ret; } static int au8522_read_signal_strength(struct dvb_frontend *fe, u16 *signal_strength) { /* borrowed from lgdt330x.c * * Calculate strength from SNR up to 35dB * Even though the SNR can go higher than 35dB, * there is some comfort factor in having a range of * strong signals that can show at 100% */ u16 snr; u32 tmp; int ret = au8522_read_snr(fe, &snr); *signal_strength = 0; if (0 == ret) { /* The following calculation method was chosen * purely for the sake of code re-use from the * other demod drivers that use this method */ /* Convert from SNR in dB * 10 to 8.24 fixed-point */ tmp = (snr * ((1 << 24) / 10)); /* Convert from 8.24 fixed-point to * scale the range 0 - 35*2^24 into 0 - 65535*/ if (tmp >= 8960 * 0x10000) *signal_strength = 0xffff; else *signal_strength = tmp / 8960; } return ret; } static int au8522_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) { struct au8522_state *state = fe->demodulator_priv; if (state->current_modulation == VSB_8) *ucblocks = au8522_readreg(state, 0x4087); else *ucblocks = au8522_readreg(state, 0x4543); return 0; } static int au8522_read_ber(struct dvb_frontend *fe, u32 *ber) { return au8522_read_ucblocks(fe, ber); } static int au8522_get_frontend(struct dvb_frontend *fe, struct dtv_frontend_properties *c) { struct au8522_state *state = fe->demodulator_priv; c->frequency = state->current_frequency; c->modulation = state->current_modulation; return 0; } static int au8522_get_tune_settings(struct dvb_frontend *fe, struct dvb_frontend_tune_settings *tune) { tune->min_delay_ms = 1000; return 0; } static struct dvb_frontend_ops au8522_ops; static void au8522_release(struct dvb_frontend *fe) { struct au8522_state *state = fe->demodulator_priv; au8522_release_state(state); } struct dvb_frontend *au8522_attach(const struct au8522_config *config, struct i2c_adapter *i2c) { struct au8522_state *state = NULL; int instance; /* allocate memory for the internal state */ instance = au8522_get_state(&state, i2c, config->demod_address); switch (instance) { case 0: dprintk("%s state allocation failed\n", __func__); break; case 1: /* new demod instance */ dprintk("%s using new instance\n", __func__); break; default: /* existing demod instance */ dprintk("%s using existing instance\n", __func__); break; } /* setup the state */ state->config = *config; state->i2c = i2c; state->operational_mode = AU8522_DIGITAL_MODE; /* create dvb_frontend */ memcpy(&state->frontend.ops, &au8522_ops, sizeof(struct dvb_frontend_ops)); state->frontend.demodulator_priv = state; state->frontend.ops.analog_ops.i2c_gate_ctrl = au8522_analog_i2c_gate_ctrl; if (au8522_init(&state->frontend) != 0) { printk(KERN_ERR "%s: Failed to initialize correctly\n", __func__); goto error; } /* Note: Leaving the I2C gate open here. */ au8522_i2c_gate_ctrl(&state->frontend, 1); return &state->frontend; error: au8522_release_state(state); return NULL; } EXPORT_SYMBOL(au8522_attach); static struct dvb_frontend_ops au8522_ops = { .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B }, .info = { .name = "Auvitek AU8522 QAM/8VSB Frontend", .frequency_min = 54000000, .frequency_max = 858000000, .frequency_stepsize = 62500, .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB }, .init = au8522_init, .sleep = au8522_sleep, .i2c_gate_ctrl = au8522_i2c_gate_ctrl, .set_frontend = au8522_set_frontend, .get_frontend = au8522_get_frontend, .get_tune_settings = au8522_get_tune_settings, .read_status = au8522_read_status, .read_ber = au8522_read_ber, .read_signal_strength = au8522_read_signal_strength, .read_snr = au8522_read_snr, .read_ucblocks = au8522_read_ucblocks, .release = au8522_release, }; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "Enable verbose debug messages"); module_param(zv_mode, int, 0644); MODULE_PARM_DESC(zv_mode, "Turn on/off ZeeVee modulator compatibility mode (default:on).\n" "\t\ton - modified AU8522 QAM256 initialization.\n" "\t\tProvides faster lock when using ZeeVee modulator based sources"); MODULE_DESCRIPTION("Auvitek AU8522 QAM-B/ATSC Demodulator driver"); MODULE_AUTHOR("Steven Toth"); MODULE_LICENSE("GPL");