Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 1 | /** |
| 2 | * Driver for Sharp IX2505V (marked B0017) DVB-S silicon tuner |
| 3 | * |
| 4 | * Copyright (C) 2010 Malcolm Priestley |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License Version 2, as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/dvb/frontend.h> |
| 23 | #include <linux/slab.h> |
| 24 | #include <linux/types.h> |
| 25 | |
| 26 | #include "ix2505v.h" |
| 27 | |
| 28 | static int ix2505v_debug; |
Mauro Carvalho Chehab | 9d10f3d | 2010-09-08 12:51:56 -0300 | [diff] [blame] | 29 | #define dprintk(level, args...) do { \ |
| 30 | if (ix2505v_debug & level) \ |
| 31 | printk(KERN_DEBUG "ix2505v: " args); \ |
| 32 | } while (0) |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 33 | |
| 34 | #define deb_info(args...) dprintk(0x01, args) |
| 35 | #define deb_i2c(args...) dprintk(0x02, args) |
| 36 | |
| 37 | struct ix2505v_state { |
| 38 | struct i2c_adapter *i2c; |
| 39 | const struct ix2505v_config *config; |
| 40 | u32 frequency; |
| 41 | }; |
| 42 | |
| 43 | /** |
| 44 | * Data read format of the Sharp IX2505V B0017 |
| 45 | * |
| 46 | * byte1: 1 | 1 | 0 | 0 | 0 | MA1 | MA0 | 1 |
| 47 | * byte2: POR | FL | RD2 | RD1 | RD0 | X | X | X |
| 48 | * |
| 49 | * byte1 = address |
| 50 | * byte2; |
Mauro Carvalho Chehab | 9d10f3d | 2010-09-08 12:51:56 -0300 | [diff] [blame] | 51 | * POR = Power on Reset (VCC H=<2.2v L=>2.2v) |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 52 | * FL = Phase Lock (H=lock L=unlock) |
| 53 | * RD0-2 = Reserved internal operations |
| 54 | * |
| 55 | * Only POR can be used to check the tuner is present |
| 56 | * |
| 57 | * Caution: after byte2 the I2C reverts to write mode continuing to read |
| 58 | * may corrupt tuning data. |
| 59 | * |
| 60 | */ |
| 61 | |
| 62 | static int ix2505v_read_status_reg(struct ix2505v_state *state) |
| 63 | { |
| 64 | u8 addr = state->config->tuner_address; |
| 65 | u8 b2[] = {0}; |
| 66 | int ret; |
| 67 | |
| 68 | struct i2c_msg msg[1] = { |
| 69 | { .addr = addr, .flags = I2C_M_RD, .buf = b2, .len = 1 } |
| 70 | }; |
| 71 | |
| 72 | ret = i2c_transfer(state->i2c, msg, 1); |
| 73 | deb_i2c("Read %s ", __func__); |
| 74 | |
Matthias Schwarzott | 13d28e4 | 2010-11-07 10:57:13 -0300 | [diff] [blame] | 75 | return (ret == 1) ? (int) b2[0] : -1; |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | static int ix2505v_write(struct ix2505v_state *state, u8 buf[], u8 count) |
| 79 | { |
| 80 | struct i2c_msg msg[1] = { |
| 81 | { .addr = state->config->tuner_address, .flags = 0, |
| 82 | .buf = buf, .len = count }, |
| 83 | }; |
| 84 | |
| 85 | int ret; |
| 86 | |
| 87 | ret = i2c_transfer(state->i2c, msg, 1); |
| 88 | |
| 89 | if (ret != 1) { |
| 90 | deb_i2c("%s: i2c error, ret=%d\n", __func__, ret); |
| 91 | return -EIO; |
| 92 | } |
| 93 | |
| 94 | return 0; |
| 95 | } |
| 96 | |
| 97 | static int ix2505v_release(struct dvb_frontend *fe) |
| 98 | { |
| 99 | struct ix2505v_state *state = fe->tuner_priv; |
| 100 | |
| 101 | fe->tuner_priv = NULL; |
| 102 | kfree(state); |
| 103 | |
| 104 | return 0; |
| 105 | } |
| 106 | |
| 107 | /** |
| 108 | * Data write format of the Sharp IX2505V B0017 |
| 109 | * |
| 110 | * byte1: 1 | 1 | 0 | 0 | 0 | 0(MA1)| 0(MA0)| 0 |
| 111 | * byte2: 0 | BG1 | BG2 | N8 | N7 | N6 | N5 | N4 |
| 112 | * byte3: N3 | N2 | N1 | A5 | A4 | A3 | A2 | A1 |
| 113 | * byte4: 1 | 1(C1) | 1(C0) | PD5 | PD4 | TM | 0(RTS)| 1(REF) |
| 114 | * byte5: BA2 | BA1 | BA0 | PSC | PD3 |PD2/TS2|DIV/TS1|PD0/TS0 |
| 115 | * |
| 116 | * byte1 = address |
| 117 | * |
| 118 | * Write order |
| 119 | * 1) byte1 -> byte2 -> byte3 -> byte4 -> byte5 |
| 120 | * 2) byte1 -> byte4 -> byte5 -> byte2 -> byte3 |
| 121 | * 3) byte1 -> byte2 -> byte3 -> byte4 |
| 122 | * 4) byte1 -> byte4 -> byte5 -> byte2 |
| 123 | * 5) byte1 -> byte2 -> byte3 |
| 124 | * 6) byte1 -> byte4 -> byte5 |
| 125 | * 7) byte1 -> byte2 |
| 126 | * 8) byte1 -> byte4 |
| 127 | * |
| 128 | * Recommended Setup |
| 129 | * 1 -> 8 -> 6 |
| 130 | */ |
| 131 | |
Mauro Carvalho Chehab | 14d24d1 | 2011-12-24 12:24:33 -0300 | [diff] [blame] | 132 | static int ix2505v_set_params(struct dvb_frontend *fe) |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 133 | { |
Mauro Carvalho Chehab | 3cc66df | 2011-12-23 18:33:18 -0300 | [diff] [blame] | 134 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 135 | struct ix2505v_state *state = fe->tuner_priv; |
Mauro Carvalho Chehab | 3cc66df | 2011-12-23 18:33:18 -0300 | [diff] [blame] | 136 | u32 frequency = c->frequency; |
| 137 | u32 b_w = (c->symbol_rate * 27) / 32000; |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 138 | u32 div_factor, N , A, x; |
| 139 | int ret = 0, len; |
| 140 | u8 gain, cc, ref, psc, local_osc, lpf; |
| 141 | u8 data[4] = {0}; |
| 142 | |
| 143 | if ((frequency < fe->ops.info.frequency_min) |
| 144 | || (frequency > fe->ops.info.frequency_max)) |
| 145 | return -EINVAL; |
| 146 | |
| 147 | if (state->config->tuner_gain) |
| 148 | gain = (state->config->tuner_gain < 4) |
| 149 | ? state->config->tuner_gain : 0; |
| 150 | else |
| 151 | gain = 0x0; |
| 152 | |
| 153 | if (state->config->tuner_chargepump) |
| 154 | cc = state->config->tuner_chargepump; |
| 155 | else |
| 156 | cc = 0x3; |
| 157 | |
| 158 | ref = 8; /* REF =1 */ |
| 159 | psc = 32; /* PSC = 0 */ |
| 160 | |
| 161 | div_factor = (frequency * ref) / 40; /* local osc = 4Mhz */ |
| 162 | x = div_factor / psc; |
| 163 | N = x/100; |
| 164 | A = ((x - (N * 100)) * psc) / 100; |
| 165 | |
| 166 | data[0] = ((gain & 0x3) << 5) | (N >> 3); |
| 167 | data[1] = (N << 5) | (A & 0x1f); |
| 168 | data[2] = 0x81 | ((cc & 0x3) << 5) ; /*PD5,PD4 & TM = 0|C1,C0|REF=1*/ |
| 169 | |
Mauro Carvalho Chehab | 9d10f3d | 2010-09-08 12:51:56 -0300 | [diff] [blame] | 170 | deb_info("Frq=%d x=%d N=%d A=%d\n", frequency, x, N, A); |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 171 | |
| 172 | if (frequency <= 1065000) |
| 173 | local_osc = (6 << 5) | 2; |
| 174 | else if (frequency <= 1170000) |
| 175 | local_osc = (7 << 5) | 2; |
| 176 | else if (frequency <= 1300000) |
| 177 | local_osc = (1 << 5); |
| 178 | else if (frequency <= 1445000) |
| 179 | local_osc = (2 << 5); |
| 180 | else if (frequency <= 1607000) |
| 181 | local_osc = (3 << 5); |
| 182 | else if (frequency <= 1778000) |
| 183 | local_osc = (4 << 5); |
| 184 | else if (frequency <= 1942000) |
| 185 | local_osc = (5 << 5); |
Mauro Carvalho Chehab | 9d10f3d | 2010-09-08 12:51:56 -0300 | [diff] [blame] | 186 | else /*frequency up to 2150000*/ |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 187 | local_osc = (6 << 5); |
| 188 | |
| 189 | data[3] = local_osc; /* all other bits set 0 */ |
| 190 | |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 191 | if (b_w <= 10000) |
| 192 | lpf = 0xc; |
| 193 | else if (b_w <= 12000) |
| 194 | lpf = 0x2; |
| 195 | else if (b_w <= 14000) |
| 196 | lpf = 0xa; |
| 197 | else if (b_w <= 16000) |
| 198 | lpf = 0x6; |
| 199 | else if (b_w <= 18000) |
| 200 | lpf = 0xe; |
| 201 | else if (b_w <= 20000) |
| 202 | lpf = 0x1; |
| 203 | else if (b_w <= 22000) |
| 204 | lpf = 0x9; |
| 205 | else if (b_w <= 24000) |
| 206 | lpf = 0x5; |
| 207 | else if (b_w <= 26000) |
| 208 | lpf = 0xd; |
| 209 | else if (b_w <= 28000) |
| 210 | lpf = 0x3; |
| 211 | else |
| 212 | lpf = 0xb; |
| 213 | |
| 214 | deb_info("Osc=%x b_w=%x lpf=%x\n", local_osc, b_w, lpf); |
Andy Shevchenko | aa735ee | 2012-12-17 22:10:48 -0300 | [diff] [blame^] | 215 | deb_info("Data 0=[%4phN]\n", data); |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 216 | |
| 217 | if (fe->ops.i2c_gate_ctrl) |
| 218 | fe->ops.i2c_gate_ctrl(fe, 1); |
| 219 | |
| 220 | len = sizeof(data); |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 221 | ret |= ix2505v_write(state, data, len); |
| 222 | |
| 223 | data[2] |= 0x4; /* set TM = 1 other bits same */ |
| 224 | |
Malcolm Priestley | 853e3b2 | 2011-04-22 06:00:22 -0300 | [diff] [blame] | 225 | if (fe->ops.i2c_gate_ctrl) |
| 226 | fe->ops.i2c_gate_ctrl(fe, 1); |
| 227 | |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 228 | len = 1; |
| 229 | ret |= ix2505v_write(state, &data[2], len); /* write byte 4 only */ |
| 230 | |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 231 | msleep(10); |
| 232 | |
| 233 | data[2] |= ((lpf >> 2) & 0x3) << 3; /* lpf */ |
| 234 | data[3] |= (lpf & 0x3) << 2; |
| 235 | |
Mauro Carvalho Chehab | 9d10f3d | 2010-09-08 12:51:56 -0300 | [diff] [blame] | 236 | deb_info("Data 2=[%x%x]\n", data[2], data[3]); |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 237 | |
Malcolm Priestley | 853e3b2 | 2011-04-22 06:00:22 -0300 | [diff] [blame] | 238 | if (fe->ops.i2c_gate_ctrl) |
| 239 | fe->ops.i2c_gate_ctrl(fe, 1); |
| 240 | |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 241 | len = 2; |
| 242 | ret |= ix2505v_write(state, &data[2], len); /* write byte 4 & 5 */ |
| 243 | |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 244 | if (state->config->min_delay_ms) |
| 245 | msleep(state->config->min_delay_ms); |
| 246 | |
| 247 | state->frequency = frequency; |
| 248 | |
| 249 | return ret; |
| 250 | } |
| 251 | |
| 252 | static int ix2505v_get_frequency(struct dvb_frontend *fe, u32 *frequency) |
| 253 | { |
| 254 | struct ix2505v_state *state = fe->tuner_priv; |
| 255 | |
| 256 | *frequency = state->frequency; |
| 257 | |
| 258 | return 0; |
| 259 | } |
| 260 | |
| 261 | static struct dvb_tuner_ops ix2505v_tuner_ops = { |
| 262 | .info = { |
| 263 | .name = "Sharp IX2505V (B0017)", |
| 264 | .frequency_min = 950000, |
| 265 | .frequency_max = 2175000 |
| 266 | }, |
| 267 | .release = ix2505v_release, |
| 268 | .set_params = ix2505v_set_params, |
| 269 | .get_frequency = ix2505v_get_frequency, |
| 270 | }; |
| 271 | |
| 272 | struct dvb_frontend *ix2505v_attach(struct dvb_frontend *fe, |
| 273 | const struct ix2505v_config *config, |
| 274 | struct i2c_adapter *i2c) |
| 275 | { |
| 276 | struct ix2505v_state *state = NULL; |
| 277 | int ret; |
| 278 | |
| 279 | if (NULL == config) { |
| 280 | deb_i2c("%s: no config ", __func__); |
| 281 | goto error; |
| 282 | } |
| 283 | |
| 284 | state = kzalloc(sizeof(struct ix2505v_state), GFP_KERNEL); |
| 285 | if (NULL == state) |
| 286 | return NULL; |
| 287 | |
| 288 | state->config = config; |
| 289 | state->i2c = i2c; |
| 290 | |
| 291 | if (state->config->tuner_write_only) { |
| 292 | if (fe->ops.i2c_gate_ctrl) |
| 293 | fe->ops.i2c_gate_ctrl(fe, 1); |
| 294 | |
| 295 | ret = ix2505v_read_status_reg(state); |
| 296 | |
| 297 | if (ret & 0x80) { |
| 298 | deb_i2c("%s: No IX2505V found\n", __func__); |
| 299 | goto error; |
| 300 | } |
| 301 | |
| 302 | if (fe->ops.i2c_gate_ctrl) |
| 303 | fe->ops.i2c_gate_ctrl(fe, 0); |
| 304 | } |
| 305 | |
| 306 | fe->tuner_priv = state; |
| 307 | |
| 308 | memcpy(&fe->ops.tuner_ops, &ix2505v_tuner_ops, |
| 309 | sizeof(struct dvb_tuner_ops)); |
| 310 | deb_i2c("%s: initialization (%s addr=0x%02x) ok\n", |
| 311 | __func__, fe->ops.tuner_ops.info.name, config->tuner_address); |
| 312 | |
| 313 | return fe; |
| 314 | |
| 315 | error: |
Jesper Juhl | 36fd978 | 2011-01-02 16:14:03 -0300 | [diff] [blame] | 316 | kfree(state); |
Malcolm Priestley | 1ae2c58 | 2010-08-28 18:07:37 -0300 | [diff] [blame] | 317 | return NULL; |
| 318 | } |
| 319 | EXPORT_SYMBOL(ix2505v_attach); |
| 320 | |
| 321 | module_param_named(debug, ix2505v_debug, int, 0644); |
| 322 | MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); |
| 323 | MODULE_DESCRIPTION("DVB IX2505V tuner driver"); |
| 324 | MODULE_AUTHOR("Malcolm Priestley"); |
| 325 | MODULE_LICENSE("GPL"); |