Steven Toth | f47623a | 2007-07-28 19:17:39 -0300 | [diff] [blame] | 1 | /* |
| 2 | * Driver for Microtune MT2131 "QAM/8VSB single chip tuner" |
| 3 | * |
| 4 | * Copyright (c) 2006 Steven Toth <stoth@hauppauge.com> |
| 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 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 | * |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | */ |
| 21 | |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/moduleparam.h> |
| 24 | #include <linux/delay.h> |
| 25 | #include <linux/dvb/frontend.h> |
| 26 | #include <linux/i2c.h> |
| 27 | |
| 28 | #include "dvb_frontend.h" |
| 29 | |
| 30 | #include "mt2131.h" |
| 31 | #include "mt2131_priv.h" |
| 32 | |
| 33 | static int debug; |
| 34 | module_param(debug, int, 0644); |
| 35 | MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); |
| 36 | |
| 37 | #define dprintk(level,fmt, arg...) if (debug >= level) \ |
| 38 | printk(KERN_INFO "%s: " fmt, "mt2131", ## arg) |
| 39 | |
| 40 | static u8 mt2131_config1[] = { |
| 41 | 0x01, |
| 42 | 0x50, 0x00, 0x50, 0x80, 0x00, 0x49, 0xfa, 0x88, |
| 43 | 0x08, 0x77, 0x41, 0x04, 0x00, 0x00, 0x00, 0x32, |
| 44 | 0x7f, 0xda, 0x4c, 0x00, 0x10, 0xaa, 0x78, 0x80, |
| 45 | 0xff, 0x68, 0xa0, 0xff, 0xdd, 0x00, 0x00 |
| 46 | }; |
| 47 | |
| 48 | static u8 mt2131_config2[] = { |
| 49 | 0x10, |
| 50 | 0x7f, 0xc8, 0x0a, 0x5f, 0x00, 0x04 |
| 51 | }; |
| 52 | |
| 53 | static int mt2131_readreg(struct mt2131_priv *priv, u8 reg, u8 *val) |
| 54 | { |
| 55 | struct i2c_msg msg[2] = { |
| 56 | { .addr = priv->cfg->i2c_address, .flags = 0, .buf = ®, .len = 1 }, |
| 57 | { .addr = priv->cfg->i2c_address, .flags = I2C_M_RD, .buf = val, .len = 1 }, |
| 58 | }; |
| 59 | |
| 60 | if (i2c_transfer(priv->i2c, msg, 2) != 2) { |
| 61 | printk(KERN_WARNING "mt2131 I2C read failed\n"); |
| 62 | return -EREMOTEIO; |
| 63 | } |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | static int mt2131_writereg(struct mt2131_priv *priv, u8 reg, u8 val) |
| 68 | { |
| 69 | u8 buf[2] = { reg, val }; |
| 70 | struct i2c_msg msg = { .addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = 2 }; |
| 71 | |
| 72 | if (i2c_transfer(priv->i2c, &msg, 1) != 1) { |
| 73 | printk(KERN_WARNING "mt2131 I2C write failed\n"); |
| 74 | return -EREMOTEIO; |
| 75 | } |
| 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | static int mt2131_writeregs(struct mt2131_priv *priv,u8 *buf, u8 len) |
| 80 | { |
| 81 | struct i2c_msg msg = { .addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = len }; |
| 82 | |
| 83 | if (i2c_transfer(priv->i2c, &msg, 1) != 1) { |
| 84 | printk(KERN_WARNING "mt2131 I2C write failed (len=%i)\n",(int)len); |
| 85 | return -EREMOTEIO; |
| 86 | } |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | static int mt2131_set_gpo(struct dvb_frontend *fe, u8 val) |
| 91 | { |
| 92 | struct mt2131_priv *priv = fe->tuner_priv; |
| 93 | u8 v; |
| 94 | |
| 95 | mt2131_readreg(priv, 0x07, &v); |
| 96 | mt2131_writereg(priv, 0x07, (v & 0xfe) | (val & 0x01)); |
| 97 | |
| 98 | return 0; |
| 99 | } |
| 100 | |
| 101 | static int mt2131_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *params) |
| 102 | { |
| 103 | struct mt2131_priv *priv; |
| 104 | int ret=0, i; |
| 105 | u32 freq; |
| 106 | u8 if_band_center; |
| 107 | u32 f_lo1,f_lo2; |
| 108 | u32 div1,num1,div2,num2; |
| 109 | u8 b[8]; |
| 110 | u8 lockval = 0; |
| 111 | |
| 112 | priv = fe->tuner_priv; |
| 113 | if (fe->ops.info.type == FE_OFDM) |
| 114 | priv->bandwidth = params->u.ofdm.bandwidth; |
| 115 | else |
| 116 | priv->bandwidth = 0; |
| 117 | |
| 118 | freq = params->frequency / 1000; // Hz -> kHz |
| 119 | dprintk(1, "%s() freq=%d\n", __FUNCTION__, freq); |
| 120 | |
| 121 | f_lo1 = freq + MT2131_IF1 * 1000; |
| 122 | f_lo1 = (f_lo1 / 250) * 250; |
| 123 | f_lo2 = f_lo1 - freq - MT2131_IF2; |
| 124 | |
| 125 | priv->frequency = (f_lo1 - f_lo2 - MT2131_IF2) * 1000, |
| 126 | |
| 127 | /* Frequency LO1 = 16MHz * (DIV1 + NUM1/8192 ) */ |
| 128 | num1 = f_lo1 * 64 / (MT2131_FREF / 128); |
| 129 | div1 = num1 / 8192; |
| 130 | num1 &= 0x1fff; |
| 131 | |
| 132 | /* Frequency LO2 = 16MHz * (DIV2 + NUM2/8192 ) */ |
| 133 | num2 = f_lo2 * 64 / (MT2131_FREF / 128); |
| 134 | div2 = num2 / 8192; |
| 135 | num2 &= 0x1fff; |
| 136 | |
| 137 | if (freq <= 82500) if_band_center = 0x00; else |
| 138 | if (freq <= 137500) if_band_center = 0x01; else |
| 139 | if (freq <= 192500) if_band_center = 0x02; else |
| 140 | if (freq <= 247500) if_band_center = 0x03; else |
| 141 | if (freq <= 302500) if_band_center = 0x04; else |
| 142 | if (freq <= 357500) if_band_center = 0x05; else |
| 143 | if (freq <= 412500) if_band_center = 0x06; else |
| 144 | if (freq <= 467500) if_band_center = 0x07; else |
| 145 | if (freq <= 522500) if_band_center = 0x08; else |
| 146 | if (freq <= 577500) if_band_center = 0x09; else |
| 147 | if (freq <= 632500) if_band_center = 0x0A; else |
| 148 | if (freq <= 687500) if_band_center = 0x0B; else |
| 149 | if (freq <= 742500) if_band_center = 0x0C; else |
| 150 | if (freq <= 797500) if_band_center = 0x0D; else |
| 151 | if (freq <= 852500) if_band_center = 0x0E; else |
| 152 | if (freq <= 907500) if_band_center = 0x0F; else |
| 153 | if (freq <= 962500) if_band_center = 0x10; else |
| 154 | if (freq <= 1017500) if_band_center = 0x11; else |
| 155 | if (freq <= 1072500) if_band_center = 0x12; else if_band_center = 0x13; |
| 156 | |
| 157 | b[0] = 1; |
| 158 | b[1] = (num1 >> 5) & 0xFF; |
| 159 | b[2] = (num1 & 0x1F); |
| 160 | b[3] = div1; |
| 161 | b[4] = (num2 >> 5) & 0xFF; |
| 162 | b[5] = num2 & 0x1F; |
| 163 | b[6] = div2; |
| 164 | |
| 165 | dprintk(1, "IF1: %dMHz IF2: %dMHz\n", MT2131_IF1, MT2131_IF2); |
| 166 | dprintk(1, "PLL freq=%dkHz band=%d\n", (int)freq, (int)if_band_center); |
| 167 | dprintk(1, "PLL f_lo1=%dkHz f_lo2=%dkHz\n", (int)f_lo1, (int)f_lo2); |
| 168 | dprintk(1, "PLL div1=%d num1=%d div2=%d num2=%d\n", |
| 169 | (int)div1, (int)num1, (int)div2, (int)num2); |
| 170 | dprintk(1, "PLL [1..6]: %2x %2x %2x %2x %2x %2x\n", |
| 171 | (int)b[1], (int)b[2], (int)b[3], (int)b[4], (int)b[5], |
| 172 | (int)b[6]); |
| 173 | |
| 174 | ret = mt2131_writeregs(priv,b,7); |
| 175 | if (ret < 0) |
| 176 | return ret; |
| 177 | |
| 178 | mt2131_writereg(priv, 0x0b, if_band_center); |
| 179 | |
| 180 | /* Wait for lock */ |
| 181 | i = 0; |
| 182 | do { |
| 183 | mt2131_readreg(priv, 0x08, &lockval); |
| 184 | if ((lockval & 0x88) == 0x88) |
| 185 | break; |
| 186 | msleep(4); |
| 187 | i++; |
| 188 | } while (i < 10); |
| 189 | |
| 190 | return ret; |
| 191 | } |
| 192 | |
| 193 | static int mt2131_get_frequency(struct dvb_frontend *fe, u32 *frequency) |
| 194 | { |
| 195 | struct mt2131_priv *priv = fe->tuner_priv; |
| 196 | dprintk(1, "%s()\n", __FUNCTION__); |
| 197 | *frequency = priv->frequency; |
| 198 | return 0; |
| 199 | } |
| 200 | |
| 201 | static int mt2131_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) |
| 202 | { |
| 203 | struct mt2131_priv *priv = fe->tuner_priv; |
| 204 | dprintk(1, "%s()\n", __FUNCTION__); |
| 205 | *bandwidth = priv->bandwidth; |
| 206 | return 0; |
| 207 | } |
| 208 | |
| 209 | static int mt2131_get_status(struct dvb_frontend *fe, u32 *status) |
| 210 | { |
| 211 | struct mt2131_priv *priv = fe->tuner_priv; |
| 212 | u8 lock_status = 0; |
| 213 | u8 afc_status = 0; |
| 214 | |
| 215 | *status = 0; |
| 216 | |
| 217 | mt2131_readreg(priv, 0x08, &lock_status); |
| 218 | if ((lock_status & 0x88) == 0x88) |
| 219 | *status = TUNER_STATUS_LOCKED; |
| 220 | |
| 221 | mt2131_readreg(priv, 0x09, &afc_status); |
| 222 | dprintk(1, "%s() - LO Status = 0x%x, AFC Status = 0x%x\n", |
| 223 | __FUNCTION__, lock_status, afc_status); |
| 224 | |
| 225 | return 0; |
| 226 | } |
| 227 | |
| 228 | static int mt2131_init(struct dvb_frontend *fe) |
| 229 | { |
| 230 | struct mt2131_priv *priv = fe->tuner_priv; |
| 231 | int ret; |
| 232 | dprintk(1, "%s()\n", __FUNCTION__); |
| 233 | |
| 234 | if ((ret = mt2131_writeregs(priv, mt2131_config1, sizeof(mt2131_config1))) < 0) |
| 235 | return ret; |
| 236 | |
| 237 | mt2131_writereg(priv, 0x0b, 0x09); |
| 238 | mt2131_writereg(priv, 0x15, 0x47); |
| 239 | mt2131_writereg(priv, 0x07, 0xf2); |
| 240 | mt2131_writereg(priv, 0x0b, 0x01); |
| 241 | |
| 242 | if ((ret = mt2131_writeregs(priv, mt2131_config2, sizeof(mt2131_config2))) < 0) |
| 243 | return ret; |
| 244 | |
| 245 | return ret; |
| 246 | } |
| 247 | |
| 248 | static int mt2131_release(struct dvb_frontend *fe) |
| 249 | { |
| 250 | dprintk(1, "%s()\n", __FUNCTION__); |
| 251 | kfree(fe->tuner_priv); |
| 252 | fe->tuner_priv = NULL; |
| 253 | return 0; |
| 254 | } |
| 255 | |
| 256 | static const struct dvb_tuner_ops mt2131_tuner_ops = { |
| 257 | .info = { |
| 258 | .name = "Microtune MT2131", |
| 259 | .frequency_min = 48000000, |
| 260 | .frequency_max = 860000000, |
| 261 | .frequency_step = 50000, |
| 262 | }, |
| 263 | |
| 264 | .release = mt2131_release, |
| 265 | .init = mt2131_init, |
| 266 | |
| 267 | .set_params = mt2131_set_params, |
| 268 | .get_frequency = mt2131_get_frequency, |
| 269 | .get_bandwidth = mt2131_get_bandwidth, |
| 270 | .get_status = mt2131_get_status |
| 271 | }; |
| 272 | |
| 273 | struct dvb_frontend * mt2131_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct mt2131_config *cfg, u16 if1) |
| 274 | { |
| 275 | struct mt2131_priv *priv = NULL; |
| 276 | u8 id = 0; |
| 277 | |
| 278 | dprintk(1, "%s()\n", __FUNCTION__); |
| 279 | |
| 280 | priv = kzalloc(sizeof(struct mt2131_priv), GFP_KERNEL); |
| 281 | if (priv == NULL) |
| 282 | return NULL; |
| 283 | |
| 284 | priv->cfg = cfg; |
| 285 | priv->bandwidth = 6000000; /* 6MHz */ |
| 286 | priv->i2c = i2c; |
| 287 | |
| 288 | if (mt2131_readreg(priv, 0, &id) != 0) { |
| 289 | kfree(priv); |
| 290 | return NULL; |
| 291 | } |
| 292 | if ( (id != 0x3E) && (id != 0x3F) ) { |
| 293 | printk(KERN_ERR "MT2131: Device not found at addr 0x%02x\n", cfg->i2c_address); |
| 294 | kfree(priv); |
| 295 | return NULL; |
| 296 | } |
| 297 | |
| 298 | printk(KERN_INFO "MT2131: successfully identified at address 0x%02x\n", cfg->i2c_address); |
| 299 | memcpy(&fe->ops.tuner_ops, &mt2131_tuner_ops, sizeof(struct dvb_tuner_ops)); |
| 300 | |
| 301 | fe->tuner_priv = priv; |
| 302 | return fe; |
| 303 | } |
| 304 | EXPORT_SYMBOL(mt2131_attach); |
| 305 | |
| 306 | MODULE_AUTHOR("Steven Toth"); |
| 307 | MODULE_DESCRIPTION("Microtune MT2131 silicon tuner driver"); |
| 308 | MODULE_LICENSE("GPL"); |