Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 1 | /* |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 2 | * Support for LGDT3302 and LGDT3303 - VSB/QAM |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2005 Wilson Michaels <wilsonmichaels@earthlink.net> |
| 5 | * |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 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 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | /* |
| 23 | * NOTES ABOUT THIS DRIVER |
| 24 | * |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 25 | * This Linux driver supports: |
| 26 | * DViCO FusionHDTV 3 Gold-Q |
| 27 | * DViCO FusionHDTV 3 Gold-T |
| 28 | * DViCO FusionHDTV 5 Gold |
Michael Krufky | 3cff00d | 2005-11-08 21:35:12 -0800 | [diff] [blame] | 29 | * DViCO FusionHDTV 5 Lite |
Michael Krufky | d8e6acf | 2006-01-09 15:32:42 -0200 | [diff] [blame] | 30 | * DViCO FusionHDTV 5 USB Gold |
Michael Krufky | c0b11b9 | 2005-11-08 21:35:32 -0800 | [diff] [blame] | 31 | * Air2PC/AirStar 2 ATSC 3rd generation (HD5000) |
Michael Krufky | 20fe4f65 | 2006-04-10 09:40:40 -0300 | [diff] [blame] | 32 | * pcHDTV HD5500 |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 33 | * |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 34 | */ |
| 35 | |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 36 | #include <linux/kernel.h> |
| 37 | #include <linux/module.h> |
| 38 | #include <linux/moduleparam.h> |
| 39 | #include <linux/init.h> |
| 40 | #include <linux/delay.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 41 | #include <linux/string.h> |
| 42 | #include <linux/slab.h> |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 43 | #include <asm/byteorder.h> |
| 44 | |
| 45 | #include "dvb_frontend.h" |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 46 | #include "dvb_math.h" |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 47 | #include "lgdt330x_priv.h" |
| 48 | #include "lgdt330x.h" |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 49 | |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 50 | /* Use Equalizer Mean Squared Error instead of Phaser Tracker MSE */ |
| 51 | /* #define USE_EQMSE */ |
| 52 | |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 53 | static int debug = 0; |
| 54 | module_param(debug, int, 0644); |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 55 | MODULE_PARM_DESC(debug,"Turn on/off lgdt330x frontend debugging (default:off)."); |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 56 | #define dprintk(args...) \ |
| 57 | do { \ |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 58 | if (debug) printk(KERN_DEBUG "lgdt330x: " args); \ |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 59 | } while (0) |
| 60 | |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 61 | struct lgdt330x_state |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 62 | { |
| 63 | struct i2c_adapter* i2c; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 64 | |
| 65 | /* Configuration settings */ |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 66 | const struct lgdt330x_config* config; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 67 | |
| 68 | struct dvb_frontend frontend; |
| 69 | |
| 70 | /* Demodulator private data */ |
| 71 | fe_modulation_t current_modulation; |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 72 | u32 snr; /* Result of last SNR calculation */ |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 73 | |
| 74 | /* Tuner private data */ |
| 75 | u32 current_frequency; |
| 76 | }; |
| 77 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 78 | static int i2c_write_demod_bytes (struct lgdt330x_state* state, |
Michael Krufky | dc9ca2a | 2005-09-06 15:19:40 -0700 | [diff] [blame] | 79 | u8 *buf, /* data bytes to send */ |
| 80 | int len /* number of bytes to send */ ) |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 81 | { |
Michael Krufky | b6aef07 | 2005-07-27 11:45:54 -0700 | [diff] [blame] | 82 | struct i2c_msg msg = |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 83 | { .addr = state->config->demod_address, |
| 84 | .flags = 0, |
| 85 | .buf = buf, |
| 86 | .len = 2 }; |
Michael Krufky | b6aef07 | 2005-07-27 11:45:54 -0700 | [diff] [blame] | 87 | int i; |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 88 | int err; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 89 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 90 | for (i=0; i<len-1; i+=2){ |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 91 | if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) { |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 92 | printk(KERN_WARNING "lgdt330x: %s error (addr %02x <- %02x, err = %i)\n", __FUNCTION__, msg.buf[0], msg.buf[1], err); |
Michael Krufky | 58ba006 | 2005-07-12 13:58:37 -0700 | [diff] [blame] | 93 | if (err < 0) |
| 94 | return err; |
| 95 | else |
| 96 | return -EREMOTEIO; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 97 | } |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 98 | msg.buf += 2; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 99 | } |
| 100 | return 0; |
| 101 | } |
Michael Krufky | b6aef07 | 2005-07-27 11:45:54 -0700 | [diff] [blame] | 102 | |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 103 | /* |
| 104 | * This routine writes the register (reg) to the demod bus |
| 105 | * then reads the data returned for (len) bytes. |
| 106 | */ |
| 107 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 108 | static u8 i2c_read_demod_bytes (struct lgdt330x_state* state, |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 109 | enum I2C_REG reg, u8* buf, int len) |
| 110 | { |
| 111 | u8 wr [] = { reg }; |
| 112 | struct i2c_msg msg [] = { |
| 113 | { .addr = state->config->demod_address, |
| 114 | .flags = 0, .buf = wr, .len = 1 }, |
| 115 | { .addr = state->config->demod_address, |
| 116 | .flags = I2C_M_RD, .buf = buf, .len = len }, |
| 117 | }; |
| 118 | int ret; |
| 119 | ret = i2c_transfer(state->i2c, msg, 2); |
| 120 | if (ret != 2) { |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 121 | printk(KERN_WARNING "lgdt330x: %s: addr 0x%02x select 0x%02x error (ret == %i)\n", __FUNCTION__, state->config->demod_address, reg, ret); |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 122 | } else { |
| 123 | ret = 0; |
| 124 | } |
| 125 | return ret; |
| 126 | } |
| 127 | |
| 128 | /* Software reset */ |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 129 | static int lgdt3302_SwReset(struct lgdt330x_state* state) |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 130 | { |
| 131 | u8 ret; |
| 132 | u8 reset[] = { |
| 133 | IRQ_MASK, |
| 134 | 0x00 /* bit 6 is active low software reset |
| 135 | * bits 5-0 are 1 to mask interrupts */ |
| 136 | }; |
| 137 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 138 | ret = i2c_write_demod_bytes(state, |
Michael Krufky | dc9ca2a | 2005-09-06 15:19:40 -0700 | [diff] [blame] | 139 | reset, sizeof(reset)); |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 140 | if (ret == 0) { |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 141 | |
| 142 | /* force reset high (inactive) and unmask interrupts */ |
| 143 | reset[1] = 0x7f; |
| 144 | ret = i2c_write_demod_bytes(state, |
Michael Krufky | dc9ca2a | 2005-09-06 15:19:40 -0700 | [diff] [blame] | 145 | reset, sizeof(reset)); |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 146 | } |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 147 | return ret; |
| 148 | } |
| 149 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 150 | static int lgdt3303_SwReset(struct lgdt330x_state* state) |
| 151 | { |
| 152 | u8 ret; |
| 153 | u8 reset[] = { |
| 154 | 0x02, |
| 155 | 0x00 /* bit 0 is active low software reset */ |
| 156 | }; |
| 157 | |
| 158 | ret = i2c_write_demod_bytes(state, |
Michael Krufky | dc9ca2a | 2005-09-06 15:19:40 -0700 | [diff] [blame] | 159 | reset, sizeof(reset)); |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 160 | if (ret == 0) { |
| 161 | |
| 162 | /* force reset high (inactive) */ |
| 163 | reset[1] = 0x01; |
| 164 | ret = i2c_write_demod_bytes(state, |
Michael Krufky | dc9ca2a | 2005-09-06 15:19:40 -0700 | [diff] [blame] | 165 | reset, sizeof(reset)); |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 166 | } |
| 167 | return ret; |
| 168 | } |
| 169 | |
| 170 | static int lgdt330x_SwReset(struct lgdt330x_state* state) |
| 171 | { |
| 172 | switch (state->config->demod_chip) { |
| 173 | case LGDT3302: |
| 174 | return lgdt3302_SwReset(state); |
| 175 | case LGDT3303: |
| 176 | return lgdt3303_SwReset(state); |
| 177 | default: |
| 178 | return -ENODEV; |
| 179 | } |
| 180 | } |
| 181 | |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 182 | static int lgdt330x_init(struct dvb_frontend* fe) |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 183 | { |
| 184 | /* Hardware reset is done using gpio[0] of cx23880x chip. |
| 185 | * I'd like to do it here, but don't know how to find chip address. |
| 186 | * cx88-cards.c arranges for the reset bit to be inactive (high). |
| 187 | * Maybe there needs to be a callable function in cx88-core or |
| 188 | * the caller of this function needs to do it. */ |
| 189 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 190 | /* |
| 191 | * Array of byte pairs <address, value> |
| 192 | * to initialize each different chip |
| 193 | */ |
| 194 | static u8 lgdt3302_init_data[] = { |
| 195 | /* Use 50MHz parameter values from spec sheet since xtal is 50 */ |
| 196 | /* Change the value of NCOCTFV[25:0] of carrier |
| 197 | recovery center frequency register */ |
| 198 | VSB_CARRIER_FREQ0, 0x00, |
| 199 | VSB_CARRIER_FREQ1, 0x87, |
| 200 | VSB_CARRIER_FREQ2, 0x8e, |
| 201 | VSB_CARRIER_FREQ3, 0x01, |
| 202 | /* Change the TPCLK pin polarity |
| 203 | data is valid on falling clock */ |
| 204 | DEMUX_CONTROL, 0xfb, |
| 205 | /* Change the value of IFBW[11:0] of |
| 206 | AGC IF/RF loop filter bandwidth register */ |
| 207 | AGC_RF_BANDWIDTH0, 0x40, |
| 208 | AGC_RF_BANDWIDTH1, 0x93, |
| 209 | AGC_RF_BANDWIDTH2, 0x00, |
| 210 | /* Change the value of bit 6, 'nINAGCBY' and |
| 211 | 'NSSEL[1:0] of ACG function control register 2 */ |
| 212 | AGC_FUNC_CTRL2, 0xc6, |
| 213 | /* Change the value of bit 6 'RFFIX' |
| 214 | of AGC function control register 3 */ |
| 215 | AGC_FUNC_CTRL3, 0x40, |
| 216 | /* Set the value of 'INLVTHD' register 0x2a/0x2c |
| 217 | to 0x7fe */ |
| 218 | AGC_DELAY0, 0x07, |
| 219 | AGC_DELAY2, 0xfe, |
| 220 | /* Change the value of IAGCBW[15:8] |
Adrian Bunk | 9aaeded | 2006-06-30 18:19:55 +0200 | [diff] [blame] | 221 | of inner AGC loop filter bandwidth */ |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 222 | AGC_LOOP_BANDWIDTH0, 0x08, |
| 223 | AGC_LOOP_BANDWIDTH1, 0x9a |
| 224 | }; |
| 225 | |
| 226 | static u8 lgdt3303_init_data[] = { |
| 227 | 0x4c, 0x14 |
| 228 | }; |
| 229 | |
Michael Krufky | c0b11b9 | 2005-11-08 21:35:32 -0800 | [diff] [blame] | 230 | static u8 flip_lgdt3303_init_data[] = { |
| 231 | 0x4c, 0x14, |
| 232 | 0x87, 0xf3 |
| 233 | }; |
| 234 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 235 | struct lgdt330x_state* state = fe->demodulator_priv; |
| 236 | char *chip_name; |
| 237 | int err; |
| 238 | |
| 239 | switch (state->config->demod_chip) { |
| 240 | case LGDT3302: |
| 241 | chip_name = "LGDT3302"; |
| 242 | err = i2c_write_demod_bytes(state, lgdt3302_init_data, |
Michael Krufky | dc9ca2a | 2005-09-06 15:19:40 -0700 | [diff] [blame] | 243 | sizeof(lgdt3302_init_data)); |
| 244 | break; |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 245 | case LGDT3303: |
| 246 | chip_name = "LGDT3303"; |
Michael Krufky | c0b11b9 | 2005-11-08 21:35:32 -0800 | [diff] [blame] | 247 | if (state->config->clock_polarity_flip) { |
| 248 | err = i2c_write_demod_bytes(state, flip_lgdt3303_init_data, |
| 249 | sizeof(flip_lgdt3303_init_data)); |
| 250 | } else { |
| 251 | err = i2c_write_demod_bytes(state, lgdt3303_init_data, |
| 252 | sizeof(lgdt3303_init_data)); |
| 253 | } |
Michael Krufky | dc9ca2a | 2005-09-06 15:19:40 -0700 | [diff] [blame] | 254 | break; |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 255 | default: |
| 256 | chip_name = "undefined"; |
| 257 | printk (KERN_WARNING "Only LGDT3302 and LGDT3303 are supported chips.\n"); |
| 258 | err = -ENODEV; |
| 259 | } |
| 260 | dprintk("%s entered as %s\n", __FUNCTION__, chip_name); |
| 261 | if (err < 0) |
| 262 | return err; |
| 263 | return lgdt330x_SwReset(state); |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 264 | } |
| 265 | |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 266 | static int lgdt330x_read_ber(struct dvb_frontend* fe, u32* ber) |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 267 | { |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 268 | *ber = 0; /* Not supplied by the demod chips */ |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 269 | return 0; |
| 270 | } |
| 271 | |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 272 | static int lgdt330x_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 273 | { |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 274 | struct lgdt330x_state* state = fe->demodulator_priv; |
| 275 | int err; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 276 | u8 buf[2]; |
| 277 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 278 | switch (state->config->demod_chip) { |
| 279 | case LGDT3302: |
| 280 | err = i2c_read_demod_bytes(state, LGDT3302_PACKET_ERR_COUNTER1, |
Michael Krufky | dc9ca2a | 2005-09-06 15:19:40 -0700 | [diff] [blame] | 281 | buf, sizeof(buf)); |
| 282 | break; |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 283 | case LGDT3303: |
| 284 | err = i2c_read_demod_bytes(state, LGDT3303_PACKET_ERR_COUNTER1, |
Michael Krufky | dc9ca2a | 2005-09-06 15:19:40 -0700 | [diff] [blame] | 285 | buf, sizeof(buf)); |
| 286 | break; |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 287 | default: |
| 288 | printk(KERN_WARNING |
Michael Krufky | dc9ca2a | 2005-09-06 15:19:40 -0700 | [diff] [blame] | 289 | "Only LGDT3302 and LGDT3303 are supported chips.\n"); |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 290 | err = -ENODEV; |
| 291 | } |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 292 | |
| 293 | *ucblocks = (buf[0] << 8) | buf[1]; |
| 294 | return 0; |
| 295 | } |
| 296 | |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 297 | static int lgdt330x_set_parameters(struct dvb_frontend* fe, |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 298 | struct dvb_frontend_parameters *param) |
| 299 | { |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 300 | /* |
| 301 | * Array of byte pairs <address, value> |
| 302 | * to initialize 8VSB for lgdt3303 chip 50 MHz IF |
| 303 | */ |
| 304 | static u8 lgdt3303_8vsb_44_data[] = { |
| 305 | 0x04, 0x00, |
| 306 | 0x0d, 0x40, |
Mauro Carvalho Chehab | 9101e62 | 2005-12-12 00:37:24 -0800 | [diff] [blame] | 307 | 0x0e, 0x87, |
| 308 | 0x0f, 0x8e, |
| 309 | 0x10, 0x01, |
| 310 | 0x47, 0x8b }; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 311 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 312 | /* |
| 313 | * Array of byte pairs <address, value> |
| 314 | * to initialize QAM for lgdt3303 chip |
| 315 | */ |
| 316 | static u8 lgdt3303_qam_data[] = { |
| 317 | 0x04, 0x00, |
| 318 | 0x0d, 0x00, |
| 319 | 0x0e, 0x00, |
| 320 | 0x0f, 0x00, |
| 321 | 0x10, 0x00, |
| 322 | 0x51, 0x63, |
| 323 | 0x47, 0x66, |
| 324 | 0x48, 0x66, |
| 325 | 0x4d, 0x1a, |
| 326 | 0x49, 0x08, |
| 327 | 0x4a, 0x9b }; |
| 328 | |
| 329 | struct lgdt330x_state* state = fe->demodulator_priv; |
| 330 | |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 331 | static u8 top_ctrl_cfg[] = { TOP_CONTROL, 0x03 }; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 332 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 333 | int err; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 334 | /* Change only if we are actually changing the modulation */ |
| 335 | if (state->current_modulation != param->u.vsb.modulation) { |
| 336 | switch(param->u.vsb.modulation) { |
| 337 | case VSB_8: |
| 338 | dprintk("%s: VSB_8 MODE\n", __FUNCTION__); |
| 339 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 340 | /* Select VSB mode */ |
| 341 | top_ctrl_cfg[1] = 0x03; |
Michael Krufky | 0ccef6d | 2005-07-27 11:45:55 -0700 | [diff] [blame] | 342 | |
| 343 | /* Select ANT connector if supported by card */ |
| 344 | if (state->config->pll_rf_set) |
| 345 | state->config->pll_rf_set(fe, 1); |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 346 | |
| 347 | if (state->config->demod_chip == LGDT3303) { |
| 348 | err = i2c_write_demod_bytes(state, lgdt3303_8vsb_44_data, |
Michael Krufky | dc9ca2a | 2005-09-06 15:19:40 -0700 | [diff] [blame] | 349 | sizeof(lgdt3303_8vsb_44_data)); |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 350 | } |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 351 | break; |
| 352 | |
| 353 | case QAM_64: |
| 354 | dprintk("%s: QAM_64 MODE\n", __FUNCTION__); |
| 355 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 356 | /* Select QAM_64 mode */ |
| 357 | top_ctrl_cfg[1] = 0x00; |
Michael Krufky | 0ccef6d | 2005-07-27 11:45:55 -0700 | [diff] [blame] | 358 | |
| 359 | /* Select CABLE connector if supported by card */ |
| 360 | if (state->config->pll_rf_set) |
| 361 | state->config->pll_rf_set(fe, 0); |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 362 | |
| 363 | if (state->config->demod_chip == LGDT3303) { |
| 364 | err = i2c_write_demod_bytes(state, lgdt3303_qam_data, |
| 365 | sizeof(lgdt3303_qam_data)); |
| 366 | } |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 367 | break; |
| 368 | |
| 369 | case QAM_256: |
| 370 | dprintk("%s: QAM_256 MODE\n", __FUNCTION__); |
| 371 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 372 | /* Select QAM_256 mode */ |
| 373 | top_ctrl_cfg[1] = 0x01; |
Michael Krufky | 0ccef6d | 2005-07-27 11:45:55 -0700 | [diff] [blame] | 374 | |
| 375 | /* Select CABLE connector if supported by card */ |
| 376 | if (state->config->pll_rf_set) |
| 377 | state->config->pll_rf_set(fe, 0); |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 378 | |
| 379 | if (state->config->demod_chip == LGDT3303) { |
| 380 | err = i2c_write_demod_bytes(state, lgdt3303_qam_data, |
| 381 | sizeof(lgdt3303_qam_data)); |
| 382 | } |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 383 | break; |
| 384 | default: |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 385 | printk(KERN_WARNING "lgdt330x: %s: Modulation type(%d) UNSUPPORTED\n", __FUNCTION__, param->u.vsb.modulation); |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 386 | return -1; |
| 387 | } |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 388 | /* |
| 389 | * select serial or parallel MPEG harware interface |
| 390 | * Serial: 0x04 for LGDT3302 or 0x40 for LGDT3303 |
| 391 | * Parallel: 0x00 |
| 392 | */ |
| 393 | top_ctrl_cfg[1] |= state->config->serial_mpeg; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 394 | |
| 395 | /* Select the requested mode */ |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 396 | i2c_write_demod_bytes(state, top_ctrl_cfg, |
Michael Krufky | dc9ca2a | 2005-09-06 15:19:40 -0700 | [diff] [blame] | 397 | sizeof(top_ctrl_cfg)); |
| 398 | if (state->config->set_ts_params) |
| 399 | state->config->set_ts_params(fe, 0); |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 400 | state->current_modulation = param->u.vsb.modulation; |
| 401 | } |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 402 | |
Michael Krufky | dc9ca2a | 2005-09-06 15:19:40 -0700 | [diff] [blame] | 403 | /* Tune to the specified frequency */ |
Patrick Boettcher | dea7486 | 2006-05-14 05:01:31 -0300 | [diff] [blame] | 404 | if (fe->ops.tuner_ops.set_params) { |
| 405 | fe->ops.tuner_ops.set_params(fe, param); |
| 406 | if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); |
Andrew de Quincey | 02269f3 | 2006-04-18 17:47:11 -0300 | [diff] [blame] | 407 | } |
Michael Krufky | dc9ca2a | 2005-09-06 15:19:40 -0700 | [diff] [blame] | 408 | |
| 409 | /* Keep track of the new frequency */ |
Mauro Carvalho Chehab | 4302c15 | 2006-01-09 15:25:22 -0200 | [diff] [blame] | 410 | /* FIXME this is the wrong way to do this... */ |
| 411 | /* The tuner is shared with the video4linux analog API */ |
Michael Krufky | dc9ca2a | 2005-09-06 15:19:40 -0700 | [diff] [blame] | 412 | state->current_frequency = param->frequency; |
| 413 | |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 414 | lgdt330x_SwReset(state); |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 415 | return 0; |
| 416 | } |
| 417 | |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 418 | static int lgdt330x_get_frontend(struct dvb_frontend* fe, |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 419 | struct dvb_frontend_parameters* param) |
| 420 | { |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 421 | struct lgdt330x_state *state = fe->demodulator_priv; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 422 | param->frequency = state->current_frequency; |
| 423 | return 0; |
| 424 | } |
| 425 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 426 | static int lgdt3302_read_status(struct dvb_frontend* fe, fe_status_t* status) |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 427 | { |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 428 | struct lgdt330x_state* state = fe->demodulator_priv; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 429 | u8 buf[3]; |
| 430 | |
| 431 | *status = 0; /* Reset status result */ |
| 432 | |
Michael Krufky | 08d8052 | 2005-07-07 17:58:43 -0700 | [diff] [blame] | 433 | /* AGC status register */ |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 434 | i2c_read_demod_bytes(state, AGC_STATUS, buf, 1); |
Michael Krufky | 08d8052 | 2005-07-07 17:58:43 -0700 | [diff] [blame] | 435 | dprintk("%s: AGC_STATUS = 0x%02x\n", __FUNCTION__, buf[0]); |
| 436 | if ((buf[0] & 0x0c) == 0x8){ |
| 437 | /* Test signal does not exist flag */ |
| 438 | /* as well as the AGC lock flag. */ |
| 439 | *status |= FE_HAS_SIGNAL; |
| 440 | } else { |
| 441 | /* Without a signal all other status bits are meaningless */ |
| 442 | return 0; |
| 443 | } |
| 444 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 445 | /* |
| 446 | * You must set the Mask bits to 1 in the IRQ_MASK in order |
| 447 | * to see that status bit in the IRQ_STATUS register. |
| 448 | * This is done in SwReset(); |
| 449 | */ |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 450 | /* signal status */ |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 451 | i2c_read_demod_bytes(state, TOP_CONTROL, buf, sizeof(buf)); |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 452 | dprintk("%s: TOP_CONTROL = 0x%02x, IRO_MASK = 0x%02x, IRQ_STATUS = 0x%02x\n", __FUNCTION__, buf[0], buf[1], buf[2]); |
Michael Krufky | 08d8052 | 2005-07-07 17:58:43 -0700 | [diff] [blame] | 453 | |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 454 | |
| 455 | /* sync status */ |
| 456 | if ((buf[2] & 0x03) == 0x01) { |
| 457 | *status |= FE_HAS_SYNC; |
| 458 | } |
| 459 | |
| 460 | /* FEC error status */ |
| 461 | if ((buf[2] & 0x0c) == 0x08) { |
| 462 | *status |= FE_HAS_LOCK; |
| 463 | *status |= FE_HAS_VITERBI; |
| 464 | } |
| 465 | |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 466 | /* Carrier Recovery Lock Status Register */ |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 467 | i2c_read_demod_bytes(state, CARRIER_LOCK, buf, 1); |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 468 | dprintk("%s: CARRIER_LOCK = 0x%02x\n", __FUNCTION__, buf[0]); |
| 469 | switch (state->current_modulation) { |
| 470 | case QAM_256: |
| 471 | case QAM_64: |
| 472 | /* Need to undestand why there are 3 lock levels here */ |
| 473 | if ((buf[0] & 0x07) == 0x07) |
| 474 | *status |= FE_HAS_CARRIER; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 475 | break; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 476 | case VSB_8: |
| 477 | if ((buf[0] & 0x80) == 0x80) |
| 478 | *status |= FE_HAS_CARRIER; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 479 | break; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 480 | default: |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 481 | printk("KERN_WARNING lgdt330x: %s: Modulation set to unsupported value\n", __FUNCTION__); |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 482 | } |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 483 | |
| 484 | return 0; |
| 485 | } |
| 486 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 487 | static int lgdt3303_read_status(struct dvb_frontend* fe, fe_status_t* status) |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 488 | { |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 489 | struct lgdt330x_state* state = fe->demodulator_priv; |
| 490 | int err; |
| 491 | u8 buf[3]; |
| 492 | |
| 493 | *status = 0; /* Reset status result */ |
| 494 | |
| 495 | /* lgdt3303 AGC status register */ |
| 496 | err = i2c_read_demod_bytes(state, 0x58, buf, 1); |
| 497 | if (err < 0) |
| 498 | return err; |
| 499 | |
| 500 | dprintk("%s: AGC_STATUS = 0x%02x\n", __FUNCTION__, buf[0]); |
| 501 | if ((buf[0] & 0x21) == 0x01){ |
| 502 | /* Test input signal does not exist flag */ |
| 503 | /* as well as the AGC lock flag. */ |
| 504 | *status |= FE_HAS_SIGNAL; |
| 505 | } else { |
| 506 | /* Without a signal all other status bits are meaningless */ |
| 507 | return 0; |
| 508 | } |
| 509 | |
| 510 | /* Carrier Recovery Lock Status Register */ |
| 511 | i2c_read_demod_bytes(state, CARRIER_LOCK, buf, 1); |
| 512 | dprintk("%s: CARRIER_LOCK = 0x%02x\n", __FUNCTION__, buf[0]); |
| 513 | switch (state->current_modulation) { |
| 514 | case QAM_256: |
| 515 | case QAM_64: |
| 516 | /* Need to undestand why there are 3 lock levels here */ |
| 517 | if ((buf[0] & 0x07) == 0x07) |
| 518 | *status |= FE_HAS_CARRIER; |
| 519 | else |
| 520 | break; |
| 521 | i2c_read_demod_bytes(state, 0x8a, buf, 1); |
| 522 | if ((buf[0] & 0x04) == 0x04) |
| 523 | *status |= FE_HAS_SYNC; |
| 524 | if ((buf[0] & 0x01) == 0x01) |
| 525 | *status |= FE_HAS_LOCK; |
| 526 | if ((buf[0] & 0x08) == 0x08) |
| 527 | *status |= FE_HAS_VITERBI; |
| 528 | break; |
| 529 | case VSB_8: |
| 530 | if ((buf[0] & 0x80) == 0x80) |
| 531 | *status |= FE_HAS_CARRIER; |
| 532 | else |
| 533 | break; |
| 534 | i2c_read_demod_bytes(state, 0x38, buf, 1); |
| 535 | if ((buf[0] & 0x02) == 0x00) |
| 536 | *status |= FE_HAS_SYNC; |
| 537 | if ((buf[0] & 0x01) == 0x01) { |
| 538 | *status |= FE_HAS_LOCK; |
| 539 | *status |= FE_HAS_VITERBI; |
| 540 | } |
| 541 | break; |
| 542 | default: |
| 543 | printk("KERN_WARNING lgdt330x: %s: Modulation set to unsupported value\n", __FUNCTION__); |
| 544 | } |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 545 | return 0; |
| 546 | } |
| 547 | |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 548 | /* Calculate SNR estimation (scaled by 2^24) |
| 549 | |
| 550 | 8-VSB SNR equations from LGDT3302 and LGDT3303 datasheets, QAM |
| 551 | equations from LGDT3303 datasheet. VSB is the same between the '02 |
| 552 | and '03, so maybe QAM is too? Perhaps someone with a newer datasheet |
| 553 | that has QAM information could verify? |
| 554 | |
| 555 | For 8-VSB: (two ways, take your pick) |
| 556 | LGDT3302: |
| 557 | SNR_EQ = 10 * log10(25 * 24^2 / EQ_MSE) |
| 558 | LGDT3303: |
| 559 | SNR_EQ = 10 * log10(25 * 32^2 / EQ_MSE) |
| 560 | LGDT3302 & LGDT3303: |
| 561 | SNR_PT = 10 * log10(25 * 32^2 / PT_MSE) (we use this one) |
| 562 | For 64-QAM: |
| 563 | SNR = 10 * log10( 688128 / MSEQAM) |
| 564 | For 256-QAM: |
| 565 | SNR = 10 * log10( 696320 / MSEQAM) |
| 566 | |
| 567 | We re-write the snr equation as: |
| 568 | SNR * 2^24 = 10*(c - intlog10(MSE)) |
| 569 | Where for 256-QAM, c = log10(696320) * 2^24, and so on. */ |
| 570 | |
| 571 | static u32 calculate_snr(u32 mse, u32 c) |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 572 | { |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 573 | if (mse == 0) /* No signal */ |
| 574 | return 0; |
| 575 | |
| 576 | mse = intlog10(mse); |
| 577 | if (mse > c) { |
| 578 | /* Negative SNR, which is possible, but realisticly the |
| 579 | demod will lose lock before the signal gets this bad. The |
| 580 | API only allows for unsigned values, so just return 0 */ |
| 581 | return 0; |
| 582 | } |
| 583 | return 10*(c - mse); |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 584 | } |
| 585 | |
| 586 | static int lgdt3302_read_snr(struct dvb_frontend* fe, u16* snr) |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 587 | { |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 588 | struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv; |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 589 | u8 buf[5]; /* read data buffer */ |
| 590 | u32 noise; /* noise value */ |
| 591 | u32 c; /* per-modulation SNR calculation constant */ |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 592 | |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 593 | switch(state->current_modulation) { |
| 594 | case VSB_8: |
| 595 | i2c_read_demod_bytes(state, LGDT3302_EQPH_ERR0, buf, 5); |
| 596 | #ifdef USE_EQMSE |
| 597 | /* Use Equalizer Mean-Square Error Register */ |
| 598 | /* SNR for ranges from -15.61 to +41.58 */ |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 599 | noise = ((buf[0] & 7) << 16) | (buf[1] << 8) | buf[2]; |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 600 | c = 69765745; /* log10(25*24^2)*2^24 */ |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 601 | #else |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 602 | /* Use Phase Tracker Mean-Square Error Register */ |
| 603 | /* SNR for ranges from -13.11 to +44.08 */ |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 604 | noise = ((buf[0] & 7<<3) << 13) | (buf[3] << 8) | buf[4]; |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 605 | c = 73957994; /* log10(25*32^2)*2^24 */ |
| 606 | #endif |
| 607 | break; |
| 608 | case QAM_64: |
| 609 | case QAM_256: |
| 610 | i2c_read_demod_bytes(state, CARRIER_MSEQAM1, buf, 2); |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 611 | noise = ((buf[0] & 3) << 8) | buf[1]; |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 612 | c = state->current_modulation == QAM_64 ? 97939837 : 98026066; |
| 613 | /* log10(688128)*2^24 and log10(696320)*2^24 */ |
| 614 | break; |
| 615 | default: |
| 616 | printk(KERN_ERR "lgdt330x: %s: Modulation set to unsupported value\n", |
| 617 | __FUNCTION__); |
| 618 | return -EREMOTEIO; /* return -EDRIVER_IS_GIBBERED; */ |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 619 | } |
| 620 | |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 621 | state->snr = calculate_snr(noise, c); |
| 622 | *snr = (state->snr) >> 16; /* Convert from 8.24 fixed-point to 8.8 */ |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 623 | |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 624 | dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __FUNCTION__, noise, |
| 625 | state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16); |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 626 | |
| 627 | return 0; |
| 628 | } |
| 629 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 630 | static int lgdt3303_read_snr(struct dvb_frontend* fe, u16* snr) |
| 631 | { |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 632 | struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv; |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 633 | u8 buf[5]; /* read data buffer */ |
| 634 | u32 noise; /* noise value */ |
| 635 | u32 c; /* per-modulation SNR calculation constant */ |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 636 | |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 637 | switch(state->current_modulation) { |
| 638 | case VSB_8: |
| 639 | i2c_read_demod_bytes(state, LGDT3303_EQPH_ERR0, buf, 5); |
| 640 | #ifdef USE_EQMSE |
| 641 | /* Use Equalizer Mean-Square Error Register */ |
| 642 | /* SNR for ranges from -16.12 to +44.08 */ |
| 643 | noise = ((buf[0] & 0x78) << 13) | (buf[1] << 8) | buf[2]; |
| 644 | c = 73957994; /* log10(25*32^2)*2^24 */ |
| 645 | #else |
| 646 | /* Use Phase Tracker Mean-Square Error Register */ |
| 647 | /* SNR for ranges from -13.11 to +44.08 */ |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 648 | noise = ((buf[0] & 7) << 16) | (buf[3] << 8) | buf[4]; |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 649 | c = 73957994; /* log10(25*32^2)*2^24 */ |
| 650 | #endif |
| 651 | break; |
| 652 | case QAM_64: |
| 653 | case QAM_256: |
| 654 | i2c_read_demod_bytes(state, CARRIER_MSEQAM1, buf, 2); |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 655 | noise = (buf[0] << 8) | buf[1]; |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 656 | c = state->current_modulation == QAM_64 ? 97939837 : 98026066; |
| 657 | /* log10(688128)*2^24 and log10(696320)*2^24 */ |
| 658 | break; |
| 659 | default: |
| 660 | printk(KERN_ERR "lgdt330x: %s: Modulation set to unsupported value\n", |
| 661 | __FUNCTION__); |
| 662 | return -EREMOTEIO; /* return -EDRIVER_IS_GIBBERED; */ |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 663 | } |
| 664 | |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 665 | state->snr = calculate_snr(noise, c); |
| 666 | *snr = (state->snr) >> 16; /* Convert from 8.24 fixed-point to 8.8 */ |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 667 | |
Trent Piepho | 19be685 | 2006-10-29 13:35:39 -0300 | [diff] [blame^] | 668 | dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __FUNCTION__, noise, |
| 669 | state->snr >> 24, (((state->snr >> 8) & 0xffff) * 100) >> 16); |
| 670 | |
| 671 | return 0; |
| 672 | } |
| 673 | |
| 674 | static int lgdt330x_read_signal_strength(struct dvb_frontend* fe, u16* strength) |
| 675 | { |
| 676 | /* Calculate Strength from SNR up to 35dB */ |
| 677 | /* Even though the SNR can go higher than 35dB, there is some comfort */ |
| 678 | /* factor in having a range of strong signals that can show at 100% */ |
| 679 | struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv; |
| 680 | u16 snr; |
| 681 | int ret; |
| 682 | |
| 683 | ret = fe->ops.read_snr(fe, &snr); |
| 684 | if (ret != 0) |
| 685 | return ret; |
| 686 | /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */ |
| 687 | /* scale the range 0 - 35*2^24 into 0 - 65535 */ |
| 688 | if (state->snr >= 8960 * 0x10000) |
| 689 | *strength = 0xffff; |
| 690 | else |
| 691 | *strength = state->snr / 8960; |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 692 | |
| 693 | return 0; |
| 694 | } |
| 695 | |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 696 | static int lgdt330x_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fe_tune_settings) |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 697 | { |
| 698 | /* I have no idea about this - it may not be needed */ |
| 699 | fe_tune_settings->min_delay_ms = 500; |
| 700 | fe_tune_settings->step_size = 0; |
| 701 | fe_tune_settings->max_drift = 0; |
| 702 | return 0; |
| 703 | } |
| 704 | |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 705 | static void lgdt330x_release(struct dvb_frontend* fe) |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 706 | { |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 707 | struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 708 | kfree(state); |
| 709 | } |
| 710 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 711 | static struct dvb_frontend_ops lgdt3302_ops; |
| 712 | static struct dvb_frontend_ops lgdt3303_ops; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 713 | |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 714 | struct dvb_frontend* lgdt330x_attach(const struct lgdt330x_config* config, |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 715 | struct i2c_adapter* i2c) |
| 716 | { |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 717 | struct lgdt330x_state* state = NULL; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 718 | u8 buf[1]; |
| 719 | |
| 720 | /* Allocate memory for the internal state */ |
Panagiotis Issaris | 7408187 | 2006-01-11 19:40:56 -0200 | [diff] [blame] | 721 | state = kzalloc(sizeof(struct lgdt330x_state), GFP_KERNEL); |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 722 | if (state == NULL) |
| 723 | goto error; |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 724 | |
| 725 | /* Setup the state */ |
| 726 | state->config = config; |
| 727 | state->i2c = i2c; |
Patrick Boettcher | dea7486 | 2006-05-14 05:01:31 -0300 | [diff] [blame] | 728 | |
| 729 | /* Create dvb_frontend */ |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 730 | switch (config->demod_chip) { |
| 731 | case LGDT3302: |
Patrick Boettcher | dea7486 | 2006-05-14 05:01:31 -0300 | [diff] [blame] | 732 | memcpy(&state->frontend.ops, &lgdt3302_ops, sizeof(struct dvb_frontend_ops)); |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 733 | break; |
| 734 | case LGDT3303: |
Patrick Boettcher | dea7486 | 2006-05-14 05:01:31 -0300 | [diff] [blame] | 735 | memcpy(&state->frontend.ops, &lgdt3303_ops, sizeof(struct dvb_frontend_ops)); |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 736 | break; |
| 737 | default: |
| 738 | goto error; |
| 739 | } |
Patrick Boettcher | dea7486 | 2006-05-14 05:01:31 -0300 | [diff] [blame] | 740 | state->frontend.demodulator_priv = state; |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 741 | |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 742 | /* Verify communication with demod chip */ |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 743 | if (i2c_read_demod_bytes(state, 2, buf, 1)) |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 744 | goto error; |
| 745 | |
| 746 | state->current_frequency = -1; |
| 747 | state->current_modulation = -1; |
| 748 | |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 749 | return &state->frontend; |
| 750 | |
| 751 | error: |
Jesper Juhl | 2ea7533 | 2005-11-07 01:01:31 -0800 | [diff] [blame] | 752 | kfree(state); |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 753 | dprintk("%s: ERROR\n",__FUNCTION__); |
| 754 | return NULL; |
| 755 | } |
| 756 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 757 | static struct dvb_frontend_ops lgdt3302_ops = { |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 758 | .info = { |
Michael Krufky | e179d8b | 2005-08-09 17:48:54 -0700 | [diff] [blame] | 759 | .name= "LG Electronics LGDT3302 VSB/QAM Frontend", |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 760 | .type = FE_ATSC, |
| 761 | .frequency_min= 54000000, |
| 762 | .frequency_max= 858000000, |
| 763 | .frequency_stepsize= 62500, |
Michael Krufky | 66944e9 | 2005-11-08 21:35:55 -0800 | [diff] [blame] | 764 | .symbol_rate_min = 5056941, /* QAM 64 */ |
| 765 | .symbol_rate_max = 10762000, /* VSB 8 */ |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 766 | .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB |
| 767 | }, |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 768 | .init = lgdt330x_init, |
| 769 | .set_frontend = lgdt330x_set_parameters, |
| 770 | .get_frontend = lgdt330x_get_frontend, |
| 771 | .get_tune_settings = lgdt330x_get_tune_settings, |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 772 | .read_status = lgdt3302_read_status, |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 773 | .read_ber = lgdt330x_read_ber, |
| 774 | .read_signal_strength = lgdt330x_read_signal_strength, |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 775 | .read_snr = lgdt3302_read_snr, |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 776 | .read_ucblocks = lgdt330x_read_ucblocks, |
| 777 | .release = lgdt330x_release, |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 778 | }; |
| 779 | |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 780 | static struct dvb_frontend_ops lgdt3303_ops = { |
| 781 | .info = { |
| 782 | .name= "LG Electronics LGDT3303 VSB/QAM Frontend", |
| 783 | .type = FE_ATSC, |
| 784 | .frequency_min= 54000000, |
| 785 | .frequency_max= 858000000, |
| 786 | .frequency_stepsize= 62500, |
Michael Krufky | 66944e9 | 2005-11-08 21:35:55 -0800 | [diff] [blame] | 787 | .symbol_rate_min = 5056941, /* QAM 64 */ |
| 788 | .symbol_rate_max = 10762000, /* VSB 8 */ |
Michael Krufky | 1963c90 | 2005-08-08 09:22:43 -0700 | [diff] [blame] | 789 | .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB |
| 790 | }, |
| 791 | .init = lgdt330x_init, |
| 792 | .set_frontend = lgdt330x_set_parameters, |
| 793 | .get_frontend = lgdt330x_get_frontend, |
| 794 | .get_tune_settings = lgdt330x_get_tune_settings, |
| 795 | .read_status = lgdt3303_read_status, |
| 796 | .read_ber = lgdt330x_read_ber, |
| 797 | .read_signal_strength = lgdt330x_read_signal_strength, |
| 798 | .read_snr = lgdt3303_read_snr, |
| 799 | .read_ucblocks = lgdt330x_read_ucblocks, |
| 800 | .release = lgdt330x_release, |
| 801 | }; |
| 802 | |
| 803 | MODULE_DESCRIPTION("LGDT330X (ATSC 8VSB & ITU-T J.83 AnnexB 64/256 QAM) Demodulator Driver"); |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 804 | MODULE_AUTHOR("Wilson Michaels"); |
| 805 | MODULE_LICENSE("GPL"); |
| 806 | |
Michael Krufky | 6ddcc91 | 2005-07-27 11:46:00 -0700 | [diff] [blame] | 807 | EXPORT_SYMBOL(lgdt330x_attach); |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 808 | |
| 809 | /* |
| 810 | * Local variables: |
| 811 | * c-basic-offset: 8 |
Mac Michaels | d8667cb | 2005-07-07 17:58:29 -0700 | [diff] [blame] | 812 | * End: |
| 813 | */ |