1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Samsung s5h1432 DVB-T demodulator driver 4 * 5 * Copyright (C) 2009 Bill Liu <Bill.Liu@Conexant.com> 6 */ 7 8 #include <linux/kernel.h> 9 #include <linux/init.h> 10 #include <linux/module.h> 11 #include <linux/string.h> 12 #include <linux/slab.h> 13 #include <linux/delay.h> 14 #include <media/dvb_frontend.h> 15 #include "s5h1432.h" 16 17 struct s5h1432_state { 18 19 struct i2c_adapter *i2c; 20 21 /* configuration settings */ 22 const struct s5h1432_config *config; 23 24 struct dvb_frontend frontend; 25 26 enum fe_modulation current_modulation; 27 unsigned int first_tune:1; 28 29 u32 current_frequency; 30 int if_freq; 31 32 u8 inversion; 33 }; 34 35 static int debug; 36 37 #define dprintk(arg...) do { \ 38 if (debug) \ 39 printk(arg); \ 40 } while (0) 41 42 static int s5h1432_writereg(struct s5h1432_state *state, 43 u8 addr, u8 reg, u8 data) 44 { 45 int ret; 46 u8 buf[] = { reg, data }; 47 48 struct i2c_msg msg = {.addr = addr, .flags = 0, .buf = buf, .len = 2 }; 49 50 ret = i2c_transfer(state->i2c, &msg, 1); 51 52 if (ret != 1) 53 printk(KERN_ERR "%s: writereg error 0x%02x 0x%02x 0x%04x, ret == %i)\n", 54 __func__, addr, reg, data, ret); 55 56 return (ret != 1) ? -1 : 0; 57 } 58 59 static u8 s5h1432_readreg(struct s5h1432_state *state, u8 addr, u8 reg) 60 { 61 int ret; 62 u8 b0[] = { reg }; 63 u8 b1[] = { 0 }; 64 65 struct i2c_msg msg[] = { 66 {.addr = addr, .flags = 0, .buf = b0, .len = 1}, 67 {.addr = addr, .flags = I2C_M_RD, .buf = b1, .len = 1} 68 }; 69 70 ret = i2c_transfer(state->i2c, msg, 2); 71 72 if (ret != 2) 73 printk(KERN_ERR "%s: readreg error (ret == %i)\n", 74 __func__, ret); 75 return b1[0]; 76 } 77 78 static int s5h1432_sleep(struct dvb_frontend *fe) 79 { 80 return 0; 81 } 82 83 static int s5h1432_set_channel_bandwidth(struct dvb_frontend *fe, 84 u32 bandwidth) 85 { 86 struct s5h1432_state *state = fe->demodulator_priv; 87 88 u8 reg = 0; 89 90 /* Register [0x2E] bit 3:2 : 8MHz = 0; 7MHz = 1; 6MHz = 2 */ 91 reg = s5h1432_readreg(state, S5H1432_I2C_TOP_ADDR, 0x2E); 92 reg &= ~(0x0C); 93 switch (bandwidth) { 94 case 6: 95 reg |= 0x08; 96 break; 97 case 7: 98 reg |= 0x04; 99 break; 100 case 8: 101 reg |= 0x00; 102 break; 103 default: 104 return 0; 105 } 106 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x2E, reg); 107 return 1; 108 } 109 110 static int s5h1432_set_IF(struct dvb_frontend *fe, u32 ifFreqHz) 111 { 112 struct s5h1432_state *state = fe->demodulator_priv; 113 114 switch (ifFreqHz) { 115 case TAIWAN_HI_IF_FREQ_44_MHZ: 116 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4, 0x55); 117 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5, 0x55); 118 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7, 0x15); 119 break; 120 case EUROPE_HI_IF_FREQ_36_MHZ: 121 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4, 0x00); 122 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5, 0x00); 123 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7, 0x40); 124 break; 125 case IF_FREQ_6_MHZ: 126 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4, 0x00); 127 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5, 0x00); 128 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7, 0xe0); 129 break; 130 case IF_FREQ_3point3_MHZ: 131 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4, 0x66); 132 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5, 0x66); 133 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7, 0xEE); 134 break; 135 case IF_FREQ_3point5_MHZ: 136 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4, 0x55); 137 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5, 0x55); 138 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7, 0xED); 139 break; 140 case IF_FREQ_4_MHZ: 141 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4, 0xAA); 142 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5, 0xAA); 143 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7, 0xEA); 144 break; 145 default: 146 { 147 u32 value = 0; 148 value = (u32) (((48000 - (ifFreqHz / 1000)) * 512 * 149 (u32) 32768) / (48 * 1000)); 150 printk(KERN_INFO 151 "Default IFFreq %d :reg value = 0x%x\n", 152 ifFreqHz, value); 153 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4, 154 (u8) value & 0xFF); 155 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5, 156 (u8) (value >> 8) & 0xFF); 157 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7, 158 (u8) (value >> 16) & 0xFF); 159 break; 160 } 161 162 } 163 164 return 1; 165 } 166 167 /* Talk to the demod, set the FEC, GUARD, QAM settings etc */ 168 static int s5h1432_set_frontend(struct dvb_frontend *fe) 169 { 170 struct dtv_frontend_properties *p = &fe->dtv_property_cache; 171 u32 dvb_bandwidth = 8; 172 struct s5h1432_state *state = fe->demodulator_priv; 173 174 if (p->frequency == state->current_frequency) { 175 /*current_frequency = p->frequency; */ 176 /*state->current_frequency = p->frequency; */ 177 } else { 178 fe->ops.tuner_ops.set_params(fe); 179 msleep(300); 180 s5h1432_set_channel_bandwidth(fe, dvb_bandwidth); 181 switch (p->bandwidth_hz) { 182 case 6000000: 183 dvb_bandwidth = 6; 184 s5h1432_set_IF(fe, IF_FREQ_4_MHZ); 185 break; 186 case 7000000: 187 dvb_bandwidth = 7; 188 s5h1432_set_IF(fe, IF_FREQ_4_MHZ); 189 break; 190 case 8000000: 191 dvb_bandwidth = 8; 192 s5h1432_set_IF(fe, IF_FREQ_4_MHZ); 193 break; 194 default: 195 return 0; 196 } 197 /*fe->ops.tuner_ops.set_params(fe); */ 198 /*Soft Reset chip*/ 199 msleep(30); 200 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09, 0x1a); 201 msleep(30); 202 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09, 0x1b); 203 204 s5h1432_set_channel_bandwidth(fe, dvb_bandwidth); 205 switch (p->bandwidth_hz) { 206 case 6000000: 207 dvb_bandwidth = 6; 208 s5h1432_set_IF(fe, IF_FREQ_4_MHZ); 209 break; 210 case 7000000: 211 dvb_bandwidth = 7; 212 s5h1432_set_IF(fe, IF_FREQ_4_MHZ); 213 break; 214 case 8000000: 215 dvb_bandwidth = 8; 216 s5h1432_set_IF(fe, IF_FREQ_4_MHZ); 217 break; 218 default: 219 return 0; 220 } 221 /*fe->ops.tuner_ops.set_params(fe); */ 222 /*Soft Reset chip*/ 223 msleep(30); 224 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09, 0x1a); 225 msleep(30); 226 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09, 0x1b); 227 228 } 229 230 state->current_frequency = p->frequency; 231 232 return 0; 233 } 234 235 static int s5h1432_init(struct dvb_frontend *fe) 236 { 237 struct s5h1432_state *state = fe->demodulator_priv; 238 239 u8 reg = 0; 240 state->current_frequency = 0; 241 printk(KERN_INFO " s5h1432_init().\n"); 242 243 /*Set VSB mode as default, this also does a soft reset */ 244 /*Initialize registers */ 245 246 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x04, 0xa8); 247 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x05, 0x01); 248 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x07, 0x70); 249 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x19, 0x80); 250 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x1b, 0x9D); 251 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x1c, 0x30); 252 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x1d, 0x20); 253 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x1e, 0x1B); 254 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x2e, 0x40); 255 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x42, 0x84); 256 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x50, 0x5a); 257 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x5a, 0xd3); 258 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x68, 0x50); 259 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xb8, 0x3c); 260 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xc4, 0x10); 261 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xcc, 0x9c); 262 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xDA, 0x00); 263 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe1, 0x94); 264 /* s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xf4, 0xa1); */ 265 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xf9, 0x00); 266 267 /*For NXP tuner*/ 268 269 /*Set 3.3MHz as default IF frequency */ 270 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe4, 0x66); 271 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe5, 0x66); 272 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0xe7, 0xEE); 273 /* Set reg 0x1E to get the full dynamic range */ 274 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x1e, 0x31); 275 276 /* Mode setting in demod */ 277 reg = s5h1432_readreg(state, S5H1432_I2C_TOP_ADDR, 0x42); 278 reg |= 0x80; 279 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x42, reg); 280 /* Serial mode */ 281 282 /* Soft Reset chip */ 283 284 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09, 0x1a); 285 msleep(30); 286 s5h1432_writereg(state, S5H1432_I2C_TOP_ADDR, 0x09, 0x1b); 287 288 289 return 0; 290 } 291 292 static int s5h1432_read_status(struct dvb_frontend *fe, enum fe_status *status) 293 { 294 return 0; 295 } 296 297 static int s5h1432_read_signal_strength(struct dvb_frontend *fe, 298 u16 *signal_strength) 299 { 300 return 0; 301 } 302 303 static int s5h1432_read_snr(struct dvb_frontend *fe, u16 *snr) 304 { 305 return 0; 306 } 307 308 static int s5h1432_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) 309 { 310 311 return 0; 312 } 313 314 static int s5h1432_read_ber(struct dvb_frontend *fe, u32 *ber) 315 { 316 return 0; 317 } 318 319 static int s5h1432_get_tune_settings(struct dvb_frontend *fe, 320 struct dvb_frontend_tune_settings *tune) 321 { 322 return 0; 323 } 324 325 static void s5h1432_release(struct dvb_frontend *fe) 326 { 327 struct s5h1432_state *state = fe->demodulator_priv; 328 kfree(state); 329 } 330 331 static const struct dvb_frontend_ops s5h1432_ops; 332 333 struct dvb_frontend *s5h1432_attach(const struct s5h1432_config *config, 334 struct i2c_adapter *i2c) 335 { 336 struct s5h1432_state *state = NULL; 337 338 printk(KERN_INFO " Enter s5h1432_attach(). attach success!\n"); 339 /* allocate memory for the internal state */ 340 state = kmalloc(sizeof(struct s5h1432_state), GFP_KERNEL); 341 if (!state) 342 return NULL; 343 344 /* setup the state */ 345 state->config = config; 346 state->i2c = i2c; 347 state->current_modulation = QAM_16; 348 state->inversion = state->config->inversion; 349 350 /* create dvb_frontend */ 351 memcpy(&state->frontend.ops, &s5h1432_ops, 352 sizeof(struct dvb_frontend_ops)); 353 354 state->frontend.demodulator_priv = state; 355 356 return &state->frontend; 357 } 358 EXPORT_SYMBOL_GPL(s5h1432_attach); 359 360 static const struct dvb_frontend_ops s5h1432_ops = { 361 .delsys = { SYS_DVBT }, 362 .info = { 363 .name = "Samsung s5h1432 DVB-T Frontend", 364 .frequency_min_hz = 177 * MHz, 365 .frequency_max_hz = 858 * MHz, 366 .frequency_stepsize_hz = 166666, 367 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | 368 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | 369 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO | 370 FE_CAN_HIERARCHY_AUTO | FE_CAN_GUARD_INTERVAL_AUTO | 371 FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_RECOVER}, 372 373 .init = s5h1432_init, 374 .sleep = s5h1432_sleep, 375 .set_frontend = s5h1432_set_frontend, 376 .get_tune_settings = s5h1432_get_tune_settings, 377 .read_status = s5h1432_read_status, 378 .read_ber = s5h1432_read_ber, 379 .read_signal_strength = s5h1432_read_signal_strength, 380 .read_snr = s5h1432_read_snr, 381 .read_ucblocks = s5h1432_read_ucblocks, 382 .release = s5h1432_release, 383 }; 384 385 module_param(debug, int, 0644); 386 MODULE_PARM_DESC(debug, "Enable verbose debug messages"); 387 388 MODULE_DESCRIPTION("Samsung s5h1432 DVB-T Demodulator driver"); 389 MODULE_AUTHOR("Bill Liu"); 390 MODULE_LICENSE("GPL"); 391