| 1 | /* $NetBSD: lg3303.c,v 1.9 2015/03/07 14:16:51 jmcneill Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright 2007 Jason Harmening |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | * |
| 28 | */ |
| 29 | |
| 30 | #include <sys/param.h> |
| 31 | __KERNEL_RCSID(0, "$NetBSD: lg3303.c,v 1.9 2015/03/07 14:16:51 jmcneill Exp $" ); |
| 32 | |
| 33 | #include <sys/types.h> |
| 34 | #include <sys/kmem.h> |
| 35 | #include <sys/module.h> |
| 36 | #include <sys/bitops.h> |
| 37 | |
| 38 | #include <dev/i2c/i2cvar.h> |
| 39 | #include <dev/i2c/lg3303var.h> |
| 40 | #include <dev/dtv/dtvif.h> |
| 41 | #include <dev/dtv/dtv_math.h> |
| 42 | |
| 43 | #define REG_TOP_CONTROL 0x00 |
| 44 | #define REG_IRQ_MASK 0x01 |
| 45 | #define REG_IRQ_STATUS 0x02 |
| 46 | #define REG_VSB_CARRIER_FREQ0 0x16 |
| 47 | #define REG_VSB_CARRIER_FREQ1 0x17 |
| 48 | #define REG_VSB_CARRIER_FREQ2 0x18 |
| 49 | #define REG_VSB_CARRIER_FREQ3 0x19 |
| 50 | #define REG_CARRIER_MSEQAM1 0x1a |
| 51 | #define REG_CARRIER_MSEQAM2 0x1b |
| 52 | #define REG_CARRIER_LOCK 0x1c |
| 53 | #define REG_TIMING_RECOVERY 0x1d |
| 54 | #define REG_AGC_DELAY0 0x2a |
| 55 | #define REG_AGC_DELAY1 0x2b |
| 56 | #define REG_AGC_DELAY2 0x2c |
| 57 | #define REG_AGC_RF_BANDWIDTH0 0x2d |
| 58 | #define REG_AGC_RF_BANDWIDTH1 0x2e |
| 59 | #define REG_AGC_RF_BANDWIDTH2 0x2f |
| 60 | #define REG_AGC_LOOP_BANDWIDTH0 0x30 |
| 61 | #define REG_AGC_LOOP_BANDWIDTH1 0x31 |
| 62 | #define REG_AGC_FUNC_CTRL1 0x32 |
| 63 | #define REG_AGC_FUNC_CTRL2 0x33 |
| 64 | #define REG_AGC_FUNC_CTRL3 0x34 |
| 65 | #define REG_AGC_RFIF_ACC0 0x39 |
| 66 | #define REG_AGC_RFIF_ACC1 0x3a |
| 67 | #define REG_AGC_RFIF_ACC2 0x3b |
| 68 | #define REG_AGC_STATUS 0x3f |
| 69 | #define REG_SYNC_STATUS_VSB 0x43 |
| 70 | #define REG_DEMUX_CONTROL 0x66 |
| 71 | #define REG_EQPH_ERR0 0x6e |
| 72 | #define REG_EQ_ERR1 0x6f |
| 73 | #define REG_EQ_ERR2 0x70 |
| 74 | #define REG_PH_ERR1 0x71 |
| 75 | #define REG_PH_ERR2 0x72 |
| 76 | #define REG_PACKET_ERR_COUNTER1 0x8b |
| 77 | #define REG_PACKET_ERR_COUNTER2 0x8c |
| 78 | |
| 79 | #define LG3303_DEFAULT_DELAY 250000 |
| 80 | |
| 81 | static int lg3303_reset(struct lg3303 *); |
| 82 | static int lg3303_init(struct lg3303 *); |
| 83 | |
| 84 | struct lg3303 * |
| 85 | lg3303_open(device_t parent, i2c_tag_t i2c, i2c_addr_t addr, int flags) |
| 86 | { |
| 87 | struct lg3303 *lg; |
| 88 | |
| 89 | lg = kmem_alloc(sizeof(*lg), KM_SLEEP); |
| 90 | if (lg == NULL) |
| 91 | return NULL; |
| 92 | lg->parent = parent; |
| 93 | lg->i2c = i2c; |
| 94 | lg->i2c_addr = addr; |
| 95 | lg->current_modulation = -1; |
| 96 | lg->flags = flags; |
| 97 | |
| 98 | if (lg3303_init(lg) != 0) { |
| 99 | kmem_free(lg, sizeof(*lg)); |
| 100 | return NULL; |
| 101 | } |
| 102 | |
| 103 | device_printf(lg->parent, "lg3303: found @ 0x%02x\n" , addr); |
| 104 | |
| 105 | return lg; |
| 106 | } |
| 107 | |
| 108 | void |
| 109 | lg3303_close(struct lg3303 *lg) |
| 110 | { |
| 111 | kmem_free(lg, sizeof(*lg)); |
| 112 | } |
| 113 | |
| 114 | static int |
| 115 | lg3303_write(struct lg3303 *lg, uint8_t *buf, size_t len) |
| 116 | { |
| 117 | unsigned int i; |
| 118 | uint8_t *p = buf; |
| 119 | int error; |
| 120 | |
| 121 | for (i = 0; i < len - 1; i += 2) { |
| 122 | error = iic_exec(lg->i2c, I2C_OP_WRITE_WITH_STOP, lg->i2c_addr, |
| 123 | p, 2, NULL, 0, 0); |
| 124 | if (error) |
| 125 | return error; |
| 126 | p += 2; |
| 127 | } |
| 128 | |
| 129 | return 0; |
| 130 | } |
| 131 | |
| 132 | static int |
| 133 | lg3303_read(struct lg3303 *lg, uint8_t reg, uint8_t *buf, size_t len) |
| 134 | { |
| 135 | int error; |
| 136 | |
| 137 | error = iic_exec(lg->i2c, I2C_OP_WRITE, lg->i2c_addr, |
| 138 | ®, sizeof(reg), NULL, 0, 0); |
| 139 | if (error) |
| 140 | return error; |
| 141 | return iic_exec(lg->i2c, I2C_OP_READ, lg->i2c_addr, |
| 142 | NULL, 0, buf, len, 0); |
| 143 | } |
| 144 | |
| 145 | static int |
| 146 | lg3303_reset(struct lg3303 *lg) |
| 147 | { |
| 148 | uint8_t buffer[] = {REG_IRQ_STATUS, 0x00}; |
| 149 | int error = lg3303_write(lg, buffer, 2); |
| 150 | if (error == 0) { |
| 151 | buffer[1] = 0x01; |
| 152 | error = lg3303_write(lg, buffer, 2); |
| 153 | } |
| 154 | return error; |
| 155 | } |
| 156 | |
| 157 | static int |
| 158 | lg3303_init(struct lg3303 *lg) |
| 159 | { |
| 160 | //static uint8_t init_data[] = {0x4c, 0x14, 0x87, 0xf3}; |
| 161 | static uint8_t init_data[] = {0x4c, 0x14}; |
| 162 | size_t len; |
| 163 | int error; |
| 164 | |
| 165 | #if notyet |
| 166 | if (clock_polarity == DVB_IFC_POS_POL) |
| 167 | len = 4; |
| 168 | else |
| 169 | #endif |
| 170 | len = 2; |
| 171 | |
| 172 | error = lg3303_write(lg, init_data, len); |
| 173 | if (error == 0) |
| 174 | lg3303_reset(lg); |
| 175 | |
| 176 | return error; |
| 177 | } |
| 178 | |
| 179 | int |
| 180 | lg3303_set_modulation(struct lg3303 *lg, fe_modulation_t modulation) |
| 181 | { |
| 182 | int error; |
| 183 | static uint8_t vsb_data[] = { |
| 184 | 0x04, 0x00, |
| 185 | 0x0d, 0x40, |
| 186 | 0x0e, 0x87, |
| 187 | 0x0f, 0x8e, |
| 188 | 0x10, 0x01, |
| 189 | 0x47, 0x8b |
| 190 | }; |
| 191 | static uint8_t qam_data[] = { |
| 192 | 0x04, 0x00, |
| 193 | 0x0d, 0x00, |
| 194 | 0x0e, 0x00, |
| 195 | 0x0f, 0x00, |
| 196 | 0x10, 0x00, |
| 197 | 0x51, 0x63, |
| 198 | 0x47, 0x66, |
| 199 | 0x48, 0x66, |
| 200 | 0x4d, 0x1a, |
| 201 | 0x49, 0x08, |
| 202 | 0x4a, 0x9b |
| 203 | }; |
| 204 | uint8_t top_ctrl[] = {REG_TOP_CONTROL, 0x00}; |
| 205 | |
| 206 | error = lg3303_reset(lg); |
| 207 | if (error) |
| 208 | return error; |
| 209 | |
| 210 | if (lg->flags & LG3303_CFG_SERIAL_INPUT) |
| 211 | top_ctrl[1] = 0x40; |
| 212 | |
| 213 | switch (modulation) { |
| 214 | case VSB_8: |
| 215 | top_ctrl[1] |= 0x03; |
| 216 | error = lg3303_write(lg, vsb_data, sizeof(vsb_data)); |
| 217 | if (error) |
| 218 | return error; |
| 219 | break; |
| 220 | case QAM_256: |
| 221 | top_ctrl[1] |= 0x01; |
| 222 | /* FALLTHROUGH */ |
| 223 | case QAM_64: |
| 224 | error = lg3303_write(lg, qam_data, sizeof(qam_data)); |
| 225 | if (error) |
| 226 | return error; |
| 227 | break; |
| 228 | default: |
| 229 | device_printf(lg->parent, |
| 230 | "lg3303: unsupported modulation type (%d)\n" , |
| 231 | modulation); |
| 232 | return EINVAL; |
| 233 | } |
| 234 | error = lg3303_write(lg, top_ctrl, sizeof(top_ctrl)); |
| 235 | if (error) |
| 236 | return error; |
| 237 | lg->current_modulation = modulation; |
| 238 | lg3303_reset(lg); |
| 239 | |
| 240 | return error; |
| 241 | } |
| 242 | |
| 243 | fe_status_t |
| 244 | lg3303_get_dtv_status(struct lg3303 *lg) |
| 245 | { |
| 246 | uint8_t reg = 0, value = 0x00; |
| 247 | fe_status_t festatus = 0; |
| 248 | int error = 0; |
| 249 | |
| 250 | error = lg3303_read(lg, 0x58, &value, sizeof(value)); |
| 251 | if (error) |
| 252 | return 0; |
| 253 | |
| 254 | if (value & 0x01) |
| 255 | festatus |= FE_HAS_SIGNAL; |
| 256 | |
| 257 | error = lg3303_read(lg, REG_CARRIER_LOCK, &value, sizeof(value)); |
| 258 | if (error) |
| 259 | return 0; |
| 260 | |
| 261 | switch (lg->current_modulation) { |
| 262 | case VSB_8: |
| 263 | if (value & 0x80) |
| 264 | festatus |= FE_HAS_CARRIER; |
| 265 | reg = 0x38; |
| 266 | break; |
| 267 | case QAM_64: |
| 268 | case QAM_256: |
| 269 | if ((value & 0x07) == 0x07) |
| 270 | festatus |= FE_HAS_CARRIER; |
| 271 | reg = 0x8a; |
| 272 | break; |
| 273 | default: |
| 274 | device_printf(lg->parent, |
| 275 | "lg3303: unsupported modulation type (%d)\n" , |
| 276 | lg->current_modulation); |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | if ((festatus & FE_HAS_CARRIER) == 0) |
| 281 | return festatus; |
| 282 | |
| 283 | error = lg3303_read(lg, reg, &value, sizeof(value)); |
| 284 | if (!error && (value & 0x01)) |
| 285 | festatus |= FE_HAS_LOCK; |
| 286 | |
| 287 | if (festatus & FE_HAS_LOCK) |
| 288 | festatus |= (FE_HAS_SYNC | FE_HAS_VITERBI); |
| 289 | |
| 290 | return festatus; |
| 291 | } |
| 292 | |
| 293 | uint16_t |
| 294 | lg3303_get_snr(struct lg3303 *lg) |
| 295 | { |
| 296 | int64_t noise, snr_const; |
| 297 | uint8_t buffer[5]; |
| 298 | int64_t snr; |
| 299 | int error; |
| 300 | |
| 301 | switch (lg->current_modulation) { |
| 302 | case VSB_8: |
| 303 | error = lg3303_read(lg, REG_EQPH_ERR0, buffer, sizeof(buffer)); |
| 304 | if (error) |
| 305 | return 0; |
| 306 | noise = ((buffer[0] & 7) << 16) | (buffer[3] << 8) | buffer[4]; |
| 307 | snr_const = 73957994; /* log10(2560) * pow(2,24) */ |
| 308 | break; |
| 309 | case QAM_64: |
| 310 | case QAM_256: |
| 311 | error = lg3303_read(lg, REG_CARRIER_MSEQAM1, buffer, 2); |
| 312 | if (error) |
| 313 | return 0; |
| 314 | noise = (buffer[0] << 8) | buffer[1]; |
| 315 | if (lg->current_modulation == QAM_64) |
| 316 | snr_const = 97939837; /* log10(688128) * pow(2,24) */ |
| 317 | else |
| 318 | snr_const = 98026066; /* log10(696320) * pow(2,24) */ |
| 319 | break; |
| 320 | default: |
| 321 | device_printf(lg->parent, |
| 322 | "lg3303: unsupported modulation type (%d)\n" , |
| 323 | lg->current_modulation); |
| 324 | return 0; |
| 325 | } |
| 326 | |
| 327 | if (noise == 0) |
| 328 | return 0; |
| 329 | snr = dtv_intlog10(noise); |
| 330 | if (snr > snr_const) |
| 331 | return 0; |
| 332 | return (10 * (snr_const - snr)) >> 16; |
| 333 | } |
| 334 | |
| 335 | uint16_t |
| 336 | lg3303_get_signal_strength(struct lg3303 *lg) |
| 337 | { |
| 338 | return ((uint32_t)lg3303_get_snr(lg) << 16) / 8960; |
| 339 | } |
| 340 | |
| 341 | uint32_t |
| 342 | lg3303_get_ucblocks(struct lg3303 *lg) |
| 343 | { |
| 344 | uint8_t buffer[2]; |
| 345 | int error; |
| 346 | |
| 347 | error = lg3303_read(lg, REG_PACKET_ERR_COUNTER1, buffer, sizeof(buffer)); |
| 348 | if (error) |
| 349 | return 0; |
| 350 | |
| 351 | return (buffer[0] << 8) | buffer[1]; |
| 352 | } |
| 353 | |
| 354 | MODULE(MODULE_CLASS_DRIVER, lg3303, "i2cexec,dtv_math" ); |
| 355 | |
| 356 | static int |
| 357 | lg3303_modcmd(modcmd_t cmd, void *opaque) |
| 358 | { |
| 359 | if (cmd == MODULE_CMD_INIT || cmd == MODULE_CMD_FINI) |
| 360 | return 0; |
| 361 | return ENOTTY; |
| 362 | } |
| 363 | |