Commit | Line | Data |
---|---|---|
54d75eba OD |
1 | /* |
2 | * Driver for Microtune MT2266 "Direct conversion low power broadband tuner" | |
3 | * | |
4 | * Copyright (c) 2007 Olivier DANET <odanet@caramail.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 | * GNU General Public License for more details. | |
15 | */ | |
16 | ||
17 | #include <linux/module.h> | |
54d75eba OD |
18 | #include <linux/delay.h> |
19 | #include <linux/dvb/frontend.h> | |
20 | #include <linux/i2c.h> | |
5a0e3ad6 | 21 | #include <linux/slab.h> |
54d75eba OD |
22 | |
23 | #include "dvb_frontend.h" | |
24 | #include "mt2266.h" | |
25 | ||
26 | #define I2C_ADDRESS 0x60 | |
27 | ||
28 | #define REG_PART_REV 0 | |
29 | #define REG_TUNE 1 | |
30 | #define REG_BAND 6 | |
31 | #define REG_BANDWIDTH 8 | |
32 | #define REG_LOCK 0x12 | |
33 | ||
34 | #define PART_REV 0x85 | |
35 | ||
36 | struct mt2266_priv { | |
37 | struct mt2266_config *cfg; | |
38 | struct i2c_adapter *i2c; | |
39 | ||
40 | u32 frequency; | |
41 | u32 bandwidth; | |
542794be | 42 | u8 band; |
54d75eba OD |
43 | }; |
44 | ||
542794be OD |
45 | #define MT2266_VHF 1 |
46 | #define MT2266_UHF 0 | |
47 | ||
54d75eba OD |
48 | /* Here, frequencies are expressed in kiloHertz to avoid 32 bits overflows */ |
49 | ||
50 | static int debug; | |
51 | module_param(debug, int, 0644); | |
52 | MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); | |
53 | ||
54 | #define dprintk(args...) do { if (debug) {printk(KERN_DEBUG "MT2266: " args); printk("\n"); }} while (0) | |
55 | ||
56 | // Reads a single register | |
57 | static int mt2266_readreg(struct mt2266_priv *priv, u8 reg, u8 *val) | |
58 | { | |
59 | struct i2c_msg msg[2] = { | |
60 | { .addr = priv->cfg->i2c_address, .flags = 0, .buf = ®, .len = 1 }, | |
61 | { .addr = priv->cfg->i2c_address, .flags = I2C_M_RD, .buf = val, .len = 1 }, | |
62 | }; | |
63 | if (i2c_transfer(priv->i2c, msg, 2) != 2) { | |
64 | printk(KERN_WARNING "MT2266 I2C read failed\n"); | |
65 | return -EREMOTEIO; | |
66 | } | |
67 | return 0; | |
68 | } | |
69 | ||
70 | // Writes a single register | |
71 | static int mt2266_writereg(struct mt2266_priv *priv, u8 reg, u8 val) | |
72 | { | |
73 | u8 buf[2] = { reg, val }; | |
74 | struct i2c_msg msg = { | |
75 | .addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = 2 | |
76 | }; | |
77 | if (i2c_transfer(priv->i2c, &msg, 1) != 1) { | |
78 | printk(KERN_WARNING "MT2266 I2C write failed\n"); | |
79 | return -EREMOTEIO; | |
80 | } | |
81 | return 0; | |
82 | } | |
83 | ||
84 | // Writes a set of consecutive registers | |
85 | static int mt2266_writeregs(struct mt2266_priv *priv,u8 *buf, u8 len) | |
86 | { | |
87 | struct i2c_msg msg = { | |
88 | .addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = len | |
89 | }; | |
90 | if (i2c_transfer(priv->i2c, &msg, 1) != 1) { | |
91 | printk(KERN_WARNING "MT2266 I2C write failed (len=%i)\n",(int)len); | |
92 | return -EREMOTEIO; | |
93 | } | |
94 | return 0; | |
95 | } | |
96 | ||
97 | // Initialisation sequences | |
542794be OD |
98 | static u8 mt2266_init1[] = { REG_TUNE, 0x00, 0x00, 0x28, |
99 | 0x00, 0x52, 0x99, 0x3f }; | |
54d75eba OD |
100 | |
101 | static u8 mt2266_init2[] = { | |
542794be OD |
102 | 0x17, 0x6d, 0x71, 0x61, 0xc0, 0xbf, 0xff, 0xdc, 0x00, 0x0a, 0xd4, |
103 | 0x03, 0x64, 0x64, 0x64, 0x64, 0x22, 0xaa, 0xf2, 0x1e, 0x80, 0x14, | |
104 | 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x7f, 0x5e, 0x3f, 0xff, 0xff, | |
105 | 0xff, 0x00, 0x77, 0x0f, 0x2d | |
106 | }; | |
107 | ||
108 | static u8 mt2266_init_8mhz[] = { REG_BANDWIDTH, 0x22, 0x22, 0x22, 0x22, | |
109 | 0x22, 0x22, 0x22, 0x22 }; | |
54d75eba | 110 | |
542794be OD |
111 | static u8 mt2266_init_7mhz[] = { REG_BANDWIDTH, 0x32, 0x32, 0x32, 0x32, |
112 | 0x32, 0x32, 0x32, 0x32 }; | |
54d75eba | 113 | |
542794be OD |
114 | static u8 mt2266_init_6mhz[] = { REG_BANDWIDTH, 0xa7, 0xa7, 0xa7, 0xa7, |
115 | 0xa7, 0xa7, 0xa7, 0xa7 }; | |
54d75eba | 116 | |
542794be OD |
117 | static u8 mt2266_uhf[] = { 0x1d, 0xdc, 0x00, 0x0a, 0xd4, 0x03, 0x64, 0x64, |
118 | 0x64, 0x64, 0x22, 0xaa, 0xf2, 0x1e, 0x80, 0x14 }; | |
119 | ||
120 | static u8 mt2266_vhf[] = { 0x1d, 0xfe, 0x00, 0x00, 0xb4, 0x03, 0xa5, 0xa5, | |
121 | 0xa5, 0xa5, 0x82, 0xaa, 0xf1, 0x17, 0x80, 0x1f }; | |
54d75eba OD |
122 | |
123 | #define FREF 30000 // Quartz oscillator 30 MHz | |
124 | ||
14d24d14 | 125 | static int mt2266_set_params(struct dvb_frontend *fe) |
54d75eba | 126 | { |
82c0126f | 127 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
54d75eba OD |
128 | struct mt2266_priv *priv; |
129 | int ret=0; | |
130 | u32 freq; | |
131 | u32 tune; | |
132 | u8 lnaband; | |
133 | u8 b[10]; | |
134 | int i; | |
542794be | 135 | u8 band; |
54d75eba OD |
136 | |
137 | priv = fe->tuner_priv; | |
138 | ||
82c0126f | 139 | freq = priv->frequency / 1000; /* Hz -> kHz */ |
542794be OD |
140 | if (freq < 470000 && freq > 230000) |
141 | return -EINVAL; /* Gap between VHF and UHF bands */ | |
542794be | 142 | |
82c0126f | 143 | priv->frequency = c->frequency; |
542794be OD |
144 | tune = 2 * freq * (8192/16) / (FREF/16); |
145 | band = (freq < 300000) ? MT2266_VHF : MT2266_UHF; | |
146 | if (band == MT2266_VHF) | |
147 | tune *= 2; | |
148 | ||
82c0126f MCC |
149 | switch (c->bandwidth_hz) { |
150 | case 6000000: | |
542794be OD |
151 | mt2266_writeregs(priv, mt2266_init_6mhz, |
152 | sizeof(mt2266_init_6mhz)); | |
153 | break; | |
82c0126f | 154 | case 8000000: |
542794be OD |
155 | mt2266_writeregs(priv, mt2266_init_8mhz, |
156 | sizeof(mt2266_init_8mhz)); | |
82c0126f MCC |
157 | break; |
158 | case 7000000: | |
159 | default: | |
160 | mt2266_writeregs(priv, mt2266_init_7mhz, | |
161 | sizeof(mt2266_init_7mhz)); | |
542794be OD |
162 | break; |
163 | } | |
c6f56e7d | 164 | priv->bandwidth = c->bandwidth_hz; |
542794be OD |
165 | |
166 | if (band == MT2266_VHF && priv->band == MT2266_UHF) { | |
167 | dprintk("Switch from UHF to VHF"); | |
168 | mt2266_writereg(priv, 0x05, 0x04); | |
169 | mt2266_writereg(priv, 0x19, 0x61); | |
170 | mt2266_writeregs(priv, mt2266_vhf, sizeof(mt2266_vhf)); | |
171 | } else if (band == MT2266_UHF && priv->band == MT2266_VHF) { | |
172 | dprintk("Switch from VHF to UHF"); | |
173 | mt2266_writereg(priv, 0x05, 0x52); | |
174 | mt2266_writereg(priv, 0x19, 0x61); | |
175 | mt2266_writeregs(priv, mt2266_uhf, sizeof(mt2266_uhf)); | |
176 | } | |
177 | msleep(10); | |
178 | ||
179 | if (freq <= 495000) | |
180 | lnaband = 0xEE; | |
181 | else if (freq <= 525000) | |
182 | lnaband = 0xDD; | |
183 | else if (freq <= 550000) | |
184 | lnaband = 0xCC; | |
185 | else if (freq <= 580000) | |
186 | lnaband = 0xBB; | |
187 | else if (freq <= 605000) | |
188 | lnaband = 0xAA; | |
189 | else if (freq <= 630000) | |
190 | lnaband = 0x99; | |
191 | else if (freq <= 655000) | |
192 | lnaband = 0x88; | |
193 | else if (freq <= 685000) | |
194 | lnaband = 0x77; | |
195 | else if (freq <= 710000) | |
196 | lnaband = 0x66; | |
197 | else if (freq <= 735000) | |
198 | lnaband = 0x55; | |
199 | else if (freq <= 765000) | |
200 | lnaband = 0x44; | |
201 | else if (freq <= 802000) | |
202 | lnaband = 0x33; | |
203 | else if (freq <= 840000) | |
204 | lnaband = 0x22; | |
205 | else | |
206 | lnaband = 0x11; | |
54d75eba OD |
207 | |
208 | b[0] = REG_TUNE; | |
209 | b[1] = (tune >> 8) & 0x1F; | |
210 | b[2] = tune & 0xFF; | |
211 | b[3] = tune >> 13; | |
212 | mt2266_writeregs(priv,b,4); | |
213 | ||
542794be OD |
214 | dprintk("set_parms: tune=%d band=%d %s", |
215 | (int) tune, (int) lnaband, | |
216 | (band == MT2266_UHF) ? "UHF" : "VHF"); | |
217 | dprintk("set_parms: [1..3]: %2x %2x %2x", | |
218 | (int) b[1], (int) b[2], (int)b[3]); | |
219 | ||
220 | if (band == MT2266_UHF) { | |
221 | b[0] = 0x05; | |
222 | b[1] = (priv->band == MT2266_VHF) ? 0x52 : 0x62; | |
223 | b[2] = lnaband; | |
224 | mt2266_writeregs(priv, b, 3); | |
225 | } | |
54d75eba | 226 | |
542794be | 227 | /* Wait for pll lock or timeout */ |
54d75eba OD |
228 | i = 0; |
229 | do { | |
230 | mt2266_readreg(priv,REG_LOCK,b); | |
542794be | 231 | if (b[0] & 0x40) |
54d75eba OD |
232 | break; |
233 | msleep(10); | |
234 | i++; | |
235 | } while (i<10); | |
b6884a17 | 236 | dprintk("Lock when i=%i",(int)i); |
542794be OD |
237 | |
238 | if (band == MT2266_UHF && priv->band == MT2266_VHF) | |
239 | mt2266_writereg(priv, 0x05, 0x62); | |
240 | ||
241 | priv->band = band; | |
242 | ||
54d75eba OD |
243 | return ret; |
244 | } | |
245 | ||
246 | static void mt2266_calibrate(struct mt2266_priv *priv) | |
247 | { | |
542794be OD |
248 | mt2266_writereg(priv, 0x11, 0x03); |
249 | mt2266_writereg(priv, 0x11, 0x01); | |
250 | mt2266_writeregs(priv, mt2266_init1, sizeof(mt2266_init1)); | |
251 | mt2266_writeregs(priv, mt2266_init2, sizeof(mt2266_init2)); | |
252 | mt2266_writereg(priv, 0x33, 0x5e); | |
253 | mt2266_writereg(priv, 0x10, 0x10); | |
254 | mt2266_writereg(priv, 0x10, 0x00); | |
255 | mt2266_writeregs(priv, mt2266_init_8mhz, sizeof(mt2266_init_8mhz)); | |
54d75eba | 256 | msleep(25); |
542794be OD |
257 | mt2266_writereg(priv, 0x17, 0x6d); |
258 | mt2266_writereg(priv, 0x1c, 0x00); | |
54d75eba | 259 | msleep(75); |
542794be OD |
260 | mt2266_writereg(priv, 0x17, 0x6d); |
261 | mt2266_writereg(priv, 0x1c, 0xff); | |
54d75eba OD |
262 | } |
263 | ||
264 | static int mt2266_get_frequency(struct dvb_frontend *fe, u32 *frequency) | |
265 | { | |
266 | struct mt2266_priv *priv = fe->tuner_priv; | |
267 | *frequency = priv->frequency; | |
268 | return 0; | |
269 | } | |
270 | ||
271 | static int mt2266_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) | |
272 | { | |
273 | struct mt2266_priv *priv = fe->tuner_priv; | |
274 | *bandwidth = priv->bandwidth; | |
275 | return 0; | |
276 | } | |
277 | ||
278 | static int mt2266_init(struct dvb_frontend *fe) | |
279 | { | |
542794be | 280 | int ret; |
54d75eba | 281 | struct mt2266_priv *priv = fe->tuner_priv; |
542794be OD |
282 | ret = mt2266_writereg(priv, 0x17, 0x6d); |
283 | if (ret < 0) | |
284 | return ret; | |
285 | ret = mt2266_writereg(priv, 0x1c, 0xff); | |
286 | if (ret < 0) | |
287 | return ret; | |
54d75eba OD |
288 | return 0; |
289 | } | |
290 | ||
291 | static int mt2266_sleep(struct dvb_frontend *fe) | |
292 | { | |
293 | struct mt2266_priv *priv = fe->tuner_priv; | |
542794be OD |
294 | mt2266_writereg(priv, 0x17, 0x6d); |
295 | mt2266_writereg(priv, 0x1c, 0x00); | |
54d75eba OD |
296 | return 0; |
297 | } | |
298 | ||
299 | static int mt2266_release(struct dvb_frontend *fe) | |
300 | { | |
301 | kfree(fe->tuner_priv); | |
302 | fe->tuner_priv = NULL; | |
303 | return 0; | |
304 | } | |
305 | ||
306 | static const struct dvb_tuner_ops mt2266_tuner_ops = { | |
307 | .info = { | |
308 | .name = "Microtune MT2266", | |
542794be OD |
309 | .frequency_min = 174000000, |
310 | .frequency_max = 862000000, | |
54d75eba OD |
311 | .frequency_step = 50000, |
312 | }, | |
313 | .release = mt2266_release, | |
314 | .init = mt2266_init, | |
315 | .sleep = mt2266_sleep, | |
316 | .set_params = mt2266_set_params, | |
317 | .get_frequency = mt2266_get_frequency, | |
318 | .get_bandwidth = mt2266_get_bandwidth | |
319 | }; | |
320 | ||
321 | struct dvb_frontend * mt2266_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct mt2266_config *cfg) | |
322 | { | |
323 | struct mt2266_priv *priv = NULL; | |
324 | u8 id = 0; | |
325 | ||
326 | priv = kzalloc(sizeof(struct mt2266_priv), GFP_KERNEL); | |
327 | if (priv == NULL) | |
328 | return NULL; | |
329 | ||
330 | priv->cfg = cfg; | |
331 | priv->i2c = i2c; | |
542794be | 332 | priv->band = MT2266_UHF; |
54d75eba | 333 | |
542794be | 334 | if (mt2266_readreg(priv, 0, &id)) { |
54d75eba OD |
335 | kfree(priv); |
336 | return NULL; | |
337 | } | |
338 | if (id != PART_REV) { | |
339 | kfree(priv); | |
340 | return NULL; | |
341 | } | |
342 | printk(KERN_INFO "MT2266: successfully identified\n"); | |
343 | memcpy(&fe->ops.tuner_ops, &mt2266_tuner_ops, sizeof(struct dvb_tuner_ops)); | |
344 | ||
345 | fe->tuner_priv = priv; | |
346 | mt2266_calibrate(priv); | |
347 | return fe; | |
348 | } | |
349 | EXPORT_SYMBOL(mt2266_attach); | |
350 | ||
351 | MODULE_AUTHOR("Olivier DANET"); | |
352 | MODULE_DESCRIPTION("Microtune MT2266 silicon tuner driver"); | |
353 | MODULE_LICENSE("GPL"); |