1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Driver for Sharp IX2505V (marked B0017) DVB-S silicon tuner 4 * 5 * Copyright (C) 2010 Malcolm Priestley 6 */ 7 8 #include <linux/module.h> 9 #include <linux/dvb/frontend.h> 10 #include <linux/slab.h> 11 #include <linux/types.h> 12 13 #include "ix2505v.h" 14 15 static int ix2505v_debug; 16 #define dprintk(level, args...) do { \ 17 if (ix2505v_debug & level) \ 18 printk(KERN_DEBUG "ix2505v: " args); \ 19 } while (0) 20 21 #define deb_info(args...) dprintk(0x01, args) 22 #define deb_i2c(args...) dprintk(0x02, args) 23 24 struct ix2505v_state { 25 struct i2c_adapter *i2c; 26 const struct ix2505v_config *config; 27 u32 frequency; 28 }; 29 30 /* 31 * Data read format of the Sharp IX2505V B0017 32 * 33 * byte1: 1 | 1 | 0 | 0 | 0 | MA1 | MA0 | 1 34 * byte2: POR | FL | RD2 | RD1 | RD0 | X | X | X 35 * 36 * byte1 = address 37 * byte2; 38 * POR = Power on Reset (VCC H=<2.2v L=>2.2v) 39 * FL = Phase Lock (H=lock L=unlock) 40 * RD0-2 = Reserved internal operations 41 * 42 * Only POR can be used to check the tuner is present 43 * 44 * Caution: after byte2 the I2C reverts to write mode continuing to read 45 * may corrupt tuning data. 46 * 47 */ 48 49 static int ix2505v_read_status_reg(struct ix2505v_state *state) 50 { 51 u8 addr = state->config->tuner_address; 52 u8 b2[] = {0}; 53 int ret; 54 55 struct i2c_msg msg[1] = { 56 { .addr = addr, .flags = I2C_M_RD, .buf = b2, .len = 1 } 57 }; 58 59 ret = i2c_transfer(state->i2c, msg, 1); 60 deb_i2c("Read %s ", __func__); 61 62 return (ret == 1) ? (int) b2[0] : -1; 63 } 64 65 static int ix2505v_write(struct ix2505v_state *state, u8 buf[], u8 count) 66 { 67 struct i2c_msg msg[1] = { 68 { .addr = state->config->tuner_address, .flags = 0, 69 .buf = buf, .len = count }, 70 }; 71 72 int ret; 73 74 ret = i2c_transfer(state->i2c, msg, 1); 75 76 if (ret != 1) { 77 deb_i2c("%s: i2c error, ret=%d\n", __func__, ret); 78 return -EIO; 79 } 80 81 return 0; 82 } 83 84 static void ix2505v_release(struct dvb_frontend *fe) 85 { 86 struct ix2505v_state *state = fe->tuner_priv; 87 88 fe->tuner_priv = NULL; 89 kfree(state); 90 91 } 92 93 /* 94 * Data write format of the Sharp IX2505V B0017 95 * 96 * byte1: 1 | 1 | 0 | 0 | 0 | 0(MA1)| 0(MA0)| 0 97 * byte2: 0 | BG1 | BG2 | N8 | N7 | N6 | N5 | N4 98 * byte3: N3 | N2 | N1 | A5 | A4 | A3 | A2 | A1 99 * byte4: 1 | 1(C1) | 1(C0) | PD5 | PD4 | TM | 0(RTS)| 1(REF) 100 * byte5: BA2 | BA1 | BA0 | PSC | PD3 |PD2/TS2|DIV/TS1|PD0/TS0 101 * 102 * byte1 = address 103 * 104 * Write order 105 * 1) byte1 -> byte2 -> byte3 -> byte4 -> byte5 106 * 2) byte1 -> byte4 -> byte5 -> byte2 -> byte3 107 * 3) byte1 -> byte2 -> byte3 -> byte4 108 * 4) byte1 -> byte4 -> byte5 -> byte2 109 * 5) byte1 -> byte2 -> byte3 110 * 6) byte1 -> byte4 -> byte5 111 * 7) byte1 -> byte2 112 * 8) byte1 -> byte4 113 * 114 * Recommended Setup 115 * 1 -> 8 -> 6 116 */ 117 118 static int ix2505v_set_params(struct dvb_frontend *fe) 119 { 120 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 121 struct ix2505v_state *state = fe->tuner_priv; 122 u32 frequency = c->frequency; 123 u32 b_w = (c->symbol_rate * 27) / 32000; 124 u32 div_factor, N , A, x; 125 int ret = 0, len; 126 u8 gain, cc, ref, psc, local_osc, lpf; 127 u8 data[4] = {0}; 128 129 if ((frequency < fe->ops.info.frequency_min_hz / kHz) 130 || (frequency > fe->ops.info.frequency_max_hz / kHz)) 131 return -EINVAL; 132 133 if (state->config->tuner_gain) 134 gain = (state->config->tuner_gain < 4) 135 ? state->config->tuner_gain : 0; 136 else 137 gain = 0x0; 138 139 if (state->config->tuner_chargepump) 140 cc = state->config->tuner_chargepump; 141 else 142 cc = 0x3; 143 144 ref = 8; /* REF =1 */ 145 psc = 32; /* PSC = 0 */ 146 147 div_factor = (frequency * ref) / 40; /* local osc = 4Mhz */ 148 x = div_factor / psc; 149 N = x/100; 150 A = ((x - (N * 100)) * psc) / 100; 151 152 data[0] = ((gain & 0x3) << 5) | (N >> 3); 153 data[1] = (N << 5) | (A & 0x1f); 154 data[2] = 0x81 | ((cc & 0x3) << 5) ; /*PD5,PD4 & TM = 0|C1,C0|REF=1*/ 155 156 deb_info("Frq=%d x=%d N=%d A=%d\n", frequency, x, N, A); 157 158 if (frequency <= 1065000) 159 local_osc = (6 << 5) | 2; 160 else if (frequency <= 1170000) 161 local_osc = (7 << 5) | 2; 162 else if (frequency <= 1300000) 163 local_osc = (1 << 5); 164 else if (frequency <= 1445000) 165 local_osc = (2 << 5); 166 else if (frequency <= 1607000) 167 local_osc = (3 << 5); 168 else if (frequency <= 1778000) 169 local_osc = (4 << 5); 170 else if (frequency <= 1942000) 171 local_osc = (5 << 5); 172 else /*frequency up to 2150000*/ 173 local_osc = (6 << 5); 174 175 data[3] = local_osc; /* all other bits set 0 */ 176 177 if (b_w <= 10000) 178 lpf = 0xc; 179 else if (b_w <= 12000) 180 lpf = 0x2; 181 else if (b_w <= 14000) 182 lpf = 0xa; 183 else if (b_w <= 16000) 184 lpf = 0x6; 185 else if (b_w <= 18000) 186 lpf = 0xe; 187 else if (b_w <= 20000) 188 lpf = 0x1; 189 else if (b_w <= 22000) 190 lpf = 0x9; 191 else if (b_w <= 24000) 192 lpf = 0x5; 193 else if (b_w <= 26000) 194 lpf = 0xd; 195 else if (b_w <= 28000) 196 lpf = 0x3; 197 else 198 lpf = 0xb; 199 200 deb_info("Osc=%x b_w=%x lpf=%x\n", local_osc, b_w, lpf); 201 deb_info("Data 0=[%4phN]\n", data); 202 203 if (fe->ops.i2c_gate_ctrl) 204 fe->ops.i2c_gate_ctrl(fe, 1); 205 206 len = sizeof(data); 207 ret |= ix2505v_write(state, data, len); 208 209 data[2] |= 0x4; /* set TM = 1 other bits same */ 210 211 if (fe->ops.i2c_gate_ctrl) 212 fe->ops.i2c_gate_ctrl(fe, 1); 213 214 len = 1; 215 ret |= ix2505v_write(state, &data[2], len); /* write byte 4 only */ 216 217 msleep(10); 218 219 data[2] |= ((lpf >> 2) & 0x3) << 3; /* lpf */ 220 data[3] |= (lpf & 0x3) << 2; 221 222 deb_info("Data 2=[%x%x]\n", data[2], data[3]); 223 224 if (fe->ops.i2c_gate_ctrl) 225 fe->ops.i2c_gate_ctrl(fe, 1); 226 227 len = 2; 228 ret |= ix2505v_write(state, &data[2], len); /* write byte 4 & 5 */ 229 230 if (state->config->min_delay_ms) 231 msleep(state->config->min_delay_ms); 232 233 state->frequency = frequency; 234 235 return ret; 236 } 237 238 static int ix2505v_get_frequency(struct dvb_frontend *fe, u32 *frequency) 239 { 240 struct ix2505v_state *state = fe->tuner_priv; 241 242 *frequency = state->frequency; 243 244 return 0; 245 } 246 247 static const struct dvb_tuner_ops ix2505v_tuner_ops = { 248 .info = { 249 .name = "Sharp IX2505V (B0017)", 250 .frequency_min_hz = 950 * MHz, 251 .frequency_max_hz = 2175 * MHz 252 }, 253 .release = ix2505v_release, 254 .set_params = ix2505v_set_params, 255 .get_frequency = ix2505v_get_frequency, 256 }; 257 258 struct dvb_frontend *ix2505v_attach(struct dvb_frontend *fe, 259 const struct ix2505v_config *config, 260 struct i2c_adapter *i2c) 261 { 262 struct ix2505v_state *state = NULL; 263 int ret; 264 265 if (NULL == config) { 266 deb_i2c("%s: no config ", __func__); 267 goto error; 268 } 269 270 state = kzalloc(sizeof(struct ix2505v_state), GFP_KERNEL); 271 if (NULL == state) 272 return NULL; 273 274 state->config = config; 275 state->i2c = i2c; 276 277 if (state->config->tuner_write_only) { 278 if (fe->ops.i2c_gate_ctrl) 279 fe->ops.i2c_gate_ctrl(fe, 1); 280 281 ret = ix2505v_read_status_reg(state); 282 283 if (ret & 0x80) { 284 deb_i2c("%s: No IX2505V found\n", __func__); 285 goto error; 286 } 287 288 if (fe->ops.i2c_gate_ctrl) 289 fe->ops.i2c_gate_ctrl(fe, 0); 290 } 291 292 fe->tuner_priv = state; 293 294 memcpy(&fe->ops.tuner_ops, &ix2505v_tuner_ops, 295 sizeof(struct dvb_tuner_ops)); 296 deb_i2c("%s: initialization (%s addr=0x%02x) ok\n", 297 __func__, fe->ops.tuner_ops.info.name, config->tuner_address); 298 299 return fe; 300 301 error: 302 kfree(state); 303 return NULL; 304 } 305 EXPORT_SYMBOL_GPL(ix2505v_attach); 306 307 module_param_named(debug, ix2505v_debug, int, 0644); 308 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); 309 MODULE_DESCRIPTION("DVB IX2505V tuner driver"); 310 MODULE_AUTHOR("Malcolm Priestley"); 311 MODULE_LICENSE("GPL"); 312