Igor M. Liplianin | 2ccf5a9 | 2009-06-20 09:51:48 -0300 | [diff] [blame] | 1 | /* |
| 2 | * Driver for Zarlink ZL10039 DVB-S tuner |
| 3 | * |
| 4 | * Copyright 2007 Jan D. Louw <jd.louw@mweb.co.za> |
| 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/init.h> |
| 24 | #include <linux/string.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/dvb/frontend.h> |
| 27 | |
| 28 | #include "dvb_frontend.h" |
| 29 | #include "zl10039.h" |
| 30 | |
| 31 | static int debug; |
| 32 | |
| 33 | #define dprintk(args...) \ |
| 34 | do { \ |
| 35 | if (debug) \ |
| 36 | printk(KERN_DEBUG args); \ |
| 37 | } while (0) |
| 38 | |
| 39 | enum zl10039_model_id { |
| 40 | ID_ZL10039 = 1 |
| 41 | }; |
| 42 | |
| 43 | struct zl10039_state { |
| 44 | struct i2c_adapter *i2c; |
| 45 | u8 i2c_addr; |
| 46 | u8 id; |
| 47 | }; |
| 48 | |
| 49 | enum zl10039_reg_addr { |
| 50 | PLL0 = 0, |
| 51 | PLL1, |
| 52 | PLL2, |
| 53 | PLL3, |
| 54 | RFFE, |
| 55 | BASE0, |
| 56 | BASE1, |
| 57 | BASE2, |
| 58 | LO0, |
| 59 | LO1, |
| 60 | LO2, |
| 61 | LO3, |
| 62 | LO4, |
| 63 | LO5, |
| 64 | LO6, |
| 65 | GENERAL |
| 66 | }; |
| 67 | |
| 68 | static int zl10039_read(const struct zl10039_state *state, |
| 69 | const enum zl10039_reg_addr reg, u8 *buf, |
| 70 | const size_t count) |
| 71 | { |
| 72 | u8 regbuf[] = { reg }; |
| 73 | struct i2c_msg msg[] = { |
| 74 | {/* Write register address */ |
| 75 | .addr = state->i2c_addr, |
| 76 | .flags = 0, |
| 77 | .buf = regbuf, |
| 78 | .len = 1, |
| 79 | }, {/* Read count bytes */ |
| 80 | .addr = state->i2c_addr, |
| 81 | .flags = I2C_M_RD, |
| 82 | .buf = buf, |
| 83 | .len = count, |
| 84 | }, |
| 85 | }; |
| 86 | |
| 87 | dprintk("%s\n", __func__); |
| 88 | |
| 89 | if (i2c_transfer(state->i2c, msg, 2) != 2) { |
| 90 | dprintk("%s: i2c read error\n", __func__); |
| 91 | return -EREMOTEIO; |
| 92 | } |
| 93 | |
| 94 | return 0; /* Success */ |
| 95 | } |
| 96 | |
| 97 | static int zl10039_write(struct zl10039_state *state, |
| 98 | const enum zl10039_reg_addr reg, const u8 *src, |
| 99 | const size_t count) |
| 100 | { |
| 101 | u8 buf[count + 1]; |
| 102 | struct i2c_msg msg = { |
| 103 | .addr = state->i2c_addr, |
| 104 | .flags = 0, |
| 105 | .buf = buf, |
| 106 | .len = count + 1, |
| 107 | }; |
| 108 | |
| 109 | dprintk("%s\n", __func__); |
| 110 | /* Write register address and data in one go */ |
| 111 | buf[0] = reg; |
| 112 | memcpy(&buf[1], src, count); |
| 113 | if (i2c_transfer(state->i2c, &msg, 1) != 1) { |
| 114 | dprintk("%s: i2c write error\n", __func__); |
| 115 | return -EREMOTEIO; |
| 116 | } |
| 117 | |
| 118 | return 0; /* Success */ |
| 119 | } |
| 120 | |
| 121 | static inline int zl10039_readreg(struct zl10039_state *state, |
| 122 | const enum zl10039_reg_addr reg, u8 *val) |
| 123 | { |
| 124 | return zl10039_read(state, reg, val, 1); |
| 125 | } |
| 126 | |
| 127 | static inline int zl10039_writereg(struct zl10039_state *state, |
| 128 | const enum zl10039_reg_addr reg, |
| 129 | const u8 val) |
| 130 | { |
| 131 | return zl10039_write(state, reg, &val, 1); |
| 132 | } |
| 133 | |
| 134 | static int zl10039_init(struct dvb_frontend *fe) |
| 135 | { |
| 136 | struct zl10039_state *state = fe->tuner_priv; |
| 137 | int ret; |
| 138 | |
| 139 | dprintk("%s\n", __func__); |
| 140 | if (fe->ops.i2c_gate_ctrl) |
| 141 | fe->ops.i2c_gate_ctrl(fe, 1); |
| 142 | /* Reset logic */ |
| 143 | ret = zl10039_writereg(state, GENERAL, 0x40); |
| 144 | if (ret < 0) { |
| 145 | dprintk("Note: i2c write error normal when resetting the " |
| 146 | "tuner\n"); |
| 147 | } |
| 148 | /* Wake up */ |
| 149 | ret = zl10039_writereg(state, GENERAL, 0x01); |
| 150 | if (ret < 0) { |
| 151 | dprintk("Tuner power up failed\n"); |
| 152 | return ret; |
| 153 | } |
| 154 | if (fe->ops.i2c_gate_ctrl) |
| 155 | fe->ops.i2c_gate_ctrl(fe, 0); |
| 156 | |
| 157 | return 0; |
| 158 | } |
| 159 | |
| 160 | static int zl10039_sleep(struct dvb_frontend *fe) |
| 161 | { |
| 162 | struct zl10039_state *state = fe->tuner_priv; |
| 163 | int ret; |
| 164 | |
| 165 | dprintk("%s\n", __func__); |
| 166 | if (fe->ops.i2c_gate_ctrl) |
| 167 | fe->ops.i2c_gate_ctrl(fe, 1); |
| 168 | ret = zl10039_writereg(state, GENERAL, 0x80); |
| 169 | if (ret < 0) { |
| 170 | dprintk("Tuner sleep failed\n"); |
| 171 | return ret; |
| 172 | } |
| 173 | if (fe->ops.i2c_gate_ctrl) |
| 174 | fe->ops.i2c_gate_ctrl(fe, 0); |
| 175 | |
| 176 | return 0; |
| 177 | } |
| 178 | |
Mauro Carvalho Chehab | 14d24d1 | 2011-12-24 12:24:33 -0300 | [diff] [blame] | 179 | static int zl10039_set_params(struct dvb_frontend *fe) |
Igor M. Liplianin | 2ccf5a9 | 2009-06-20 09:51:48 -0300 | [diff] [blame] | 180 | { |
Mauro Carvalho Chehab | 8579881 | 2011-12-22 21:20:31 -0300 | [diff] [blame] | 181 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
Igor M. Liplianin | 2ccf5a9 | 2009-06-20 09:51:48 -0300 | [diff] [blame] | 182 | struct zl10039_state *state = fe->tuner_priv; |
| 183 | u8 buf[6]; |
| 184 | u8 bf; |
| 185 | u32 fbw; |
| 186 | u32 div; |
| 187 | int ret; |
| 188 | |
| 189 | dprintk("%s\n", __func__); |
| 190 | dprintk("Set frequency = %d, symbol rate = %d\n", |
Mauro Carvalho Chehab | 8579881 | 2011-12-22 21:20:31 -0300 | [diff] [blame] | 191 | c->frequency, c->symbol_rate); |
Igor M. Liplianin | 2ccf5a9 | 2009-06-20 09:51:48 -0300 | [diff] [blame] | 192 | |
| 193 | /* Assumed 10.111 MHz crystal oscillator */ |
| 194 | /* Cancelled num/den 80 to prevent overflow */ |
Mauro Carvalho Chehab | 8579881 | 2011-12-22 21:20:31 -0300 | [diff] [blame] | 195 | div = (c->frequency * 1000) / 126387; |
| 196 | fbw = (c->symbol_rate * 27) / 32000; |
Igor M. Liplianin | 2ccf5a9 | 2009-06-20 09:51:48 -0300 | [diff] [blame] | 197 | /* Cancelled num/den 10 to prevent overflow */ |
| 198 | bf = ((fbw * 5088) / 1011100) - 1; |
| 199 | |
| 200 | /*PLL divider*/ |
| 201 | buf[0] = (div >> 8) & 0x7f; |
| 202 | buf[1] = (div >> 0) & 0xff; |
| 203 | /*Reference divider*/ |
| 204 | /* Select reference ratio of 80 */ |
| 205 | buf[2] = 0x1D; |
| 206 | /*PLL test modes*/ |
| 207 | buf[3] = 0x40; |
| 208 | /*RF Control register*/ |
| 209 | buf[4] = 0x6E; /* Bypass enable */ |
| 210 | /*Baseband filter cutoff */ |
| 211 | buf[5] = bf; |
| 212 | |
| 213 | /* Open i2c gate */ |
| 214 | if (fe->ops.i2c_gate_ctrl) |
| 215 | fe->ops.i2c_gate_ctrl(fe, 1); |
| 216 | /* BR = 10, Enable filter adjustment */ |
| 217 | ret = zl10039_writereg(state, BASE1, 0x0A); |
| 218 | if (ret < 0) |
| 219 | goto error; |
| 220 | /* Write new config values */ |
| 221 | ret = zl10039_write(state, PLL0, buf, sizeof(buf)); |
| 222 | if (ret < 0) |
| 223 | goto error; |
| 224 | /* BR = 10, Disable filter adjustment */ |
| 225 | ret = zl10039_writereg(state, BASE1, 0x6A); |
| 226 | if (ret < 0) |
| 227 | goto error; |
| 228 | |
| 229 | /* Close i2c gate */ |
| 230 | if (fe->ops.i2c_gate_ctrl) |
| 231 | fe->ops.i2c_gate_ctrl(fe, 0); |
| 232 | return 0; |
| 233 | error: |
| 234 | dprintk("Error setting tuner\n"); |
| 235 | return ret; |
| 236 | } |
| 237 | |
| 238 | static int zl10039_release(struct dvb_frontend *fe) |
| 239 | { |
| 240 | struct zl10039_state *state = fe->tuner_priv; |
| 241 | |
| 242 | dprintk("%s\n", __func__); |
| 243 | kfree(state); |
| 244 | fe->tuner_priv = NULL; |
| 245 | return 0; |
| 246 | } |
| 247 | |
| 248 | static struct dvb_tuner_ops zl10039_ops = { |
| 249 | .release = zl10039_release, |
| 250 | .init = zl10039_init, |
| 251 | .sleep = zl10039_sleep, |
| 252 | .set_params = zl10039_set_params, |
| 253 | }; |
| 254 | |
| 255 | struct dvb_frontend *zl10039_attach(struct dvb_frontend *fe, |
| 256 | u8 i2c_addr, struct i2c_adapter *i2c) |
| 257 | { |
| 258 | struct zl10039_state *state = NULL; |
| 259 | |
| 260 | dprintk("%s\n", __func__); |
| 261 | state = kmalloc(sizeof(struct zl10039_state), GFP_KERNEL); |
| 262 | if (state == NULL) |
| 263 | goto error; |
| 264 | |
| 265 | state->i2c = i2c; |
| 266 | state->i2c_addr = i2c_addr; |
| 267 | |
| 268 | /* Open i2c gate */ |
| 269 | if (fe->ops.i2c_gate_ctrl) |
| 270 | fe->ops.i2c_gate_ctrl(fe, 1); |
| 271 | /* check if this is a valid tuner */ |
| 272 | if (zl10039_readreg(state, GENERAL, &state->id) < 0) { |
| 273 | /* Close i2c gate */ |
| 274 | if (fe->ops.i2c_gate_ctrl) |
| 275 | fe->ops.i2c_gate_ctrl(fe, 0); |
| 276 | goto error; |
| 277 | } |
| 278 | /* Close i2c gate */ |
| 279 | if (fe->ops.i2c_gate_ctrl) |
| 280 | fe->ops.i2c_gate_ctrl(fe, 0); |
| 281 | |
| 282 | state->id = state->id & 0x0f; |
| 283 | switch (state->id) { |
| 284 | case ID_ZL10039: |
| 285 | strcpy(fe->ops.tuner_ops.info.name, |
| 286 | "Zarlink ZL10039 DVB-S tuner"); |
| 287 | break; |
| 288 | default: |
| 289 | dprintk("Chip ID=%x does not match a known type\n", state->id); |
Igor M. Liplianin | 2ccf5a9 | 2009-06-20 09:51:48 -0300 | [diff] [blame] | 290 | goto error; |
| 291 | } |
| 292 | |
| 293 | memcpy(&fe->ops.tuner_ops, &zl10039_ops, sizeof(struct dvb_tuner_ops)); |
| 294 | fe->tuner_priv = state; |
| 295 | dprintk("Tuner attached @ i2c address 0x%02x\n", i2c_addr); |
| 296 | return fe; |
| 297 | error: |
| 298 | kfree(state); |
| 299 | return NULL; |
| 300 | } |
| 301 | EXPORT_SYMBOL(zl10039_attach); |
| 302 | |
| 303 | module_param(debug, int, 0644); |
| 304 | MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); |
| 305 | MODULE_DESCRIPTION("Zarlink ZL10039 DVB-S tuner driver"); |
| 306 | MODULE_AUTHOR("Jan D. Louw <jd.louw@mweb.co.za>"); |
| 307 | MODULE_LICENSE("GPL"); |