diff options
Diffstat (limited to 'drivers/media/common/tuners/mt2266.c')
-rw-r--r-- | drivers/media/common/tuners/mt2266.c | 351 |
1 files changed, 351 insertions, 0 deletions
diff --git a/drivers/media/common/tuners/mt2266.c b/drivers/media/common/tuners/mt2266.c new file mode 100644 index 000000000000..54b18f94b14b --- /dev/null +++ b/drivers/media/common/tuners/mt2266.c | |||
@@ -0,0 +1,351 @@ | |||
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> | ||
18 | #include <linux/delay.h> | ||
19 | #include <linux/dvb/frontend.h> | ||
20 | #include <linux/i2c.h> | ||
21 | |||
22 | #include "dvb_frontend.h" | ||
23 | #include "mt2266.h" | ||
24 | |||
25 | #define I2C_ADDRESS 0x60 | ||
26 | |||
27 | #define REG_PART_REV 0 | ||
28 | #define REG_TUNE 1 | ||
29 | #define REG_BAND 6 | ||
30 | #define REG_BANDWIDTH 8 | ||
31 | #define REG_LOCK 0x12 | ||
32 | |||
33 | #define PART_REV 0x85 | ||
34 | |||
35 | struct mt2266_priv { | ||
36 | struct mt2266_config *cfg; | ||
37 | struct i2c_adapter *i2c; | ||
38 | |||
39 | u32 frequency; | ||
40 | u32 bandwidth; | ||
41 | u8 band; | ||
42 | }; | ||
43 | |||
44 | #define MT2266_VHF 1 | ||
45 | #define MT2266_UHF 0 | ||
46 | |||
47 | /* Here, frequencies are expressed in kiloHertz to avoid 32 bits overflows */ | ||
48 | |||
49 | static int debug; | ||
50 | module_param(debug, int, 0644); | ||
51 | MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); | ||
52 | |||
53 | #define dprintk(args...) do { if (debug) {printk(KERN_DEBUG "MT2266: " args); printk("\n"); }} while (0) | ||
54 | |||
55 | // Reads a single register | ||
56 | static int mt2266_readreg(struct mt2266_priv *priv, u8 reg, u8 *val) | ||
57 | { | ||
58 | struct i2c_msg msg[2] = { | ||
59 | { .addr = priv->cfg->i2c_address, .flags = 0, .buf = ®, .len = 1 }, | ||
60 | { .addr = priv->cfg->i2c_address, .flags = I2C_M_RD, .buf = val, .len = 1 }, | ||
61 | }; | ||
62 | if (i2c_transfer(priv->i2c, msg, 2) != 2) { | ||
63 | printk(KERN_WARNING "MT2266 I2C read failed\n"); | ||
64 | return -EREMOTEIO; | ||
65 | } | ||
66 | return 0; | ||
67 | } | ||
68 | |||
69 | // Writes a single register | ||
70 | static int mt2266_writereg(struct mt2266_priv *priv, u8 reg, u8 val) | ||
71 | { | ||
72 | u8 buf[2] = { reg, val }; | ||
73 | struct i2c_msg msg = { | ||
74 | .addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = 2 | ||
75 | }; | ||
76 | if (i2c_transfer(priv->i2c, &msg, 1) != 1) { | ||
77 | printk(KERN_WARNING "MT2266 I2C write failed\n"); | ||
78 | return -EREMOTEIO; | ||
79 | } | ||
80 | return 0; | ||
81 | } | ||
82 | |||
83 | // Writes a set of consecutive registers | ||
84 | static int mt2266_writeregs(struct mt2266_priv *priv,u8 *buf, u8 len) | ||
85 | { | ||
86 | struct i2c_msg msg = { | ||
87 | .addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = len | ||
88 | }; | ||
89 | if (i2c_transfer(priv->i2c, &msg, 1) != 1) { | ||
90 | printk(KERN_WARNING "MT2266 I2C write failed (len=%i)\n",(int)len); | ||
91 | return -EREMOTEIO; | ||
92 | } | ||
93 | return 0; | ||
94 | } | ||
95 | |||
96 | // Initialisation sequences | ||
97 | static u8 mt2266_init1[] = { REG_TUNE, 0x00, 0x00, 0x28, | ||
98 | 0x00, 0x52, 0x99, 0x3f }; | ||
99 | |||
100 | static u8 mt2266_init2[] = { | ||
101 | 0x17, 0x6d, 0x71, 0x61, 0xc0, 0xbf, 0xff, 0xdc, 0x00, 0x0a, 0xd4, | ||
102 | 0x03, 0x64, 0x64, 0x64, 0x64, 0x22, 0xaa, 0xf2, 0x1e, 0x80, 0x14, | ||
103 | 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x7f, 0x5e, 0x3f, 0xff, 0xff, | ||
104 | 0xff, 0x00, 0x77, 0x0f, 0x2d | ||
105 | }; | ||
106 | |||
107 | static u8 mt2266_init_8mhz[] = { REG_BANDWIDTH, 0x22, 0x22, 0x22, 0x22, | ||
108 | 0x22, 0x22, 0x22, 0x22 }; | ||
109 | |||
110 | static u8 mt2266_init_7mhz[] = { REG_BANDWIDTH, 0x32, 0x32, 0x32, 0x32, | ||
111 | 0x32, 0x32, 0x32, 0x32 }; | ||
112 | |||
113 | static u8 mt2266_init_6mhz[] = { REG_BANDWIDTH, 0xa7, 0xa7, 0xa7, 0xa7, | ||
114 | 0xa7, 0xa7, 0xa7, 0xa7 }; | ||
115 | |||
116 | static u8 mt2266_uhf[] = { 0x1d, 0xdc, 0x00, 0x0a, 0xd4, 0x03, 0x64, 0x64, | ||
117 | 0x64, 0x64, 0x22, 0xaa, 0xf2, 0x1e, 0x80, 0x14 }; | ||
118 | |||
119 | static u8 mt2266_vhf[] = { 0x1d, 0xfe, 0x00, 0x00, 0xb4, 0x03, 0xa5, 0xa5, | ||
120 | 0xa5, 0xa5, 0x82, 0xaa, 0xf1, 0x17, 0x80, 0x1f }; | ||
121 | |||
122 | #define FREF 30000 // Quartz oscillator 30 MHz | ||
123 | |||
124 | static int mt2266_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *params) | ||
125 | { | ||
126 | struct mt2266_priv *priv; | ||
127 | int ret=0; | ||
128 | u32 freq; | ||
129 | u32 tune; | ||
130 | u8 lnaband; | ||
131 | u8 b[10]; | ||
132 | int i; | ||
133 | u8 band; | ||
134 | |||
135 | priv = fe->tuner_priv; | ||
136 | |||
137 | freq = params->frequency / 1000; // Hz -> kHz | ||
138 | if (freq < 470000 && freq > 230000) | ||
139 | return -EINVAL; /* Gap between VHF and UHF bands */ | ||
140 | priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0; | ||
141 | priv->frequency = freq * 1000; | ||
142 | |||
143 | tune = 2 * freq * (8192/16) / (FREF/16); | ||
144 | band = (freq < 300000) ? MT2266_VHF : MT2266_UHF; | ||
145 | if (band == MT2266_VHF) | ||
146 | tune *= 2; | ||
147 | |||
148 | switch (params->u.ofdm.bandwidth) { | ||
149 | case BANDWIDTH_6_MHZ: | ||
150 | mt2266_writeregs(priv, mt2266_init_6mhz, | ||
151 | sizeof(mt2266_init_6mhz)); | ||
152 | break; | ||
153 | case BANDWIDTH_7_MHZ: | ||
154 | mt2266_writeregs(priv, mt2266_init_7mhz, | ||
155 | sizeof(mt2266_init_7mhz)); | ||
156 | break; | ||
157 | case BANDWIDTH_8_MHZ: | ||
158 | default: | ||
159 | mt2266_writeregs(priv, mt2266_init_8mhz, | ||
160 | sizeof(mt2266_init_8mhz)); | ||
161 | break; | ||
162 | } | ||
163 | |||
164 | if (band == MT2266_VHF && priv->band == MT2266_UHF) { | ||
165 | dprintk("Switch from UHF to VHF"); | ||
166 | mt2266_writereg(priv, 0x05, 0x04); | ||
167 | mt2266_writereg(priv, 0x19, 0x61); | ||
168 | mt2266_writeregs(priv, mt2266_vhf, sizeof(mt2266_vhf)); | ||
169 | } else if (band == MT2266_UHF && priv->band == MT2266_VHF) { | ||
170 | dprintk("Switch from VHF to UHF"); | ||
171 | mt2266_writereg(priv, 0x05, 0x52); | ||
172 | mt2266_writereg(priv, 0x19, 0x61); | ||
173 | mt2266_writeregs(priv, mt2266_uhf, sizeof(mt2266_uhf)); | ||
174 | } | ||
175 | msleep(10); | ||
176 | |||
177 | if (freq <= 495000) | ||
178 | lnaband = 0xEE; | ||
179 | else if (freq <= 525000) | ||
180 | lnaband = 0xDD; | ||
181 | else if (freq <= 550000) | ||
182 | lnaband = 0xCC; | ||
183 | else if (freq <= 580000) | ||
184 | lnaband = 0xBB; | ||
185 | else if (freq <= 605000) | ||
186 | lnaband = 0xAA; | ||
187 | else if (freq <= 630000) | ||
188 | lnaband = 0x99; | ||
189 | else if (freq <= 655000) | ||
190 | lnaband = 0x88; | ||
191 | else if (freq <= 685000) | ||
192 | lnaband = 0x77; | ||
193 | else if (freq <= 710000) | ||
194 | lnaband = 0x66; | ||
195 | else if (freq <= 735000) | ||
196 | lnaband = 0x55; | ||
197 | else if (freq <= 765000) | ||
198 | lnaband = 0x44; | ||
199 | else if (freq <= 802000) | ||
200 | lnaband = 0x33; | ||
201 | else if (freq <= 840000) | ||
202 | lnaband = 0x22; | ||
203 | else | ||
204 | lnaband = 0x11; | ||
205 | |||
206 | b[0] = REG_TUNE; | ||
207 | b[1] = (tune >> 8) & 0x1F; | ||
208 | b[2] = tune & 0xFF; | ||
209 | b[3] = tune >> 13; | ||
210 | mt2266_writeregs(priv,b,4); | ||
211 | |||
212 | dprintk("set_parms: tune=%d band=%d %s", | ||
213 | (int) tune, (int) lnaband, | ||
214 | (band == MT2266_UHF) ? "UHF" : "VHF"); | ||
215 | dprintk("set_parms: [1..3]: %2x %2x %2x", | ||
216 | (int) b[1], (int) b[2], (int)b[3]); | ||
217 | |||
218 | if (band == MT2266_UHF) { | ||
219 | b[0] = 0x05; | ||
220 | b[1] = (priv->band == MT2266_VHF) ? 0x52 : 0x62; | ||
221 | b[2] = lnaband; | ||
222 | mt2266_writeregs(priv, b, 3); | ||
223 | } | ||
224 | |||
225 | /* Wait for pll lock or timeout */ | ||
226 | i = 0; | ||
227 | do { | ||
228 | mt2266_readreg(priv,REG_LOCK,b); | ||
229 | if (b[0] & 0x40) | ||
230 | break; | ||
231 | msleep(10); | ||
232 | i++; | ||
233 | } while (i<10); | ||
234 | dprintk("Lock when i=%i",(int)i); | ||
235 | |||
236 | if (band == MT2266_UHF && priv->band == MT2266_VHF) | ||
237 | mt2266_writereg(priv, 0x05, 0x62); | ||
238 | |||
239 | priv->band = band; | ||
240 | |||
241 | return ret; | ||
242 | } | ||
243 | |||
244 | static void mt2266_calibrate(struct mt2266_priv *priv) | ||
245 | { | ||
246 | mt2266_writereg(priv, 0x11, 0x03); | ||
247 | mt2266_writereg(priv, 0x11, 0x01); | ||
248 | mt2266_writeregs(priv, mt2266_init1, sizeof(mt2266_init1)); | ||
249 | mt2266_writeregs(priv, mt2266_init2, sizeof(mt2266_init2)); | ||
250 | mt2266_writereg(priv, 0x33, 0x5e); | ||
251 | mt2266_writereg(priv, 0x10, 0x10); | ||
252 | mt2266_writereg(priv, 0x10, 0x00); | ||
253 | mt2266_writeregs(priv, mt2266_init_8mhz, sizeof(mt2266_init_8mhz)); | ||
254 | msleep(25); | ||
255 | mt2266_writereg(priv, 0x17, 0x6d); | ||
256 | mt2266_writereg(priv, 0x1c, 0x00); | ||
257 | msleep(75); | ||
258 | mt2266_writereg(priv, 0x17, 0x6d); | ||
259 | mt2266_writereg(priv, 0x1c, 0xff); | ||
260 | } | ||
261 | |||
262 | static int mt2266_get_frequency(struct dvb_frontend *fe, u32 *frequency) | ||
263 | { | ||
264 | struct mt2266_priv *priv = fe->tuner_priv; | ||
265 | *frequency = priv->frequency; | ||
266 | return 0; | ||
267 | } | ||
268 | |||
269 | static int mt2266_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) | ||
270 | { | ||
271 | struct mt2266_priv *priv = fe->tuner_priv; | ||
272 | *bandwidth = priv->bandwidth; | ||
273 | return 0; | ||
274 | } | ||
275 | |||
276 | static int mt2266_init(struct dvb_frontend *fe) | ||
277 | { | ||
278 | int ret; | ||
279 | struct mt2266_priv *priv = fe->tuner_priv; | ||
280 | ret = mt2266_writereg(priv, 0x17, 0x6d); | ||
281 | if (ret < 0) | ||
282 | return ret; | ||
283 | ret = mt2266_writereg(priv, 0x1c, 0xff); | ||
284 | if (ret < 0) | ||
285 | return ret; | ||
286 | return 0; | ||
287 | } | ||
288 | |||
289 | static int mt2266_sleep(struct dvb_frontend *fe) | ||
290 | { | ||
291 | struct mt2266_priv *priv = fe->tuner_priv; | ||
292 | mt2266_writereg(priv, 0x17, 0x6d); | ||
293 | mt2266_writereg(priv, 0x1c, 0x00); | ||
294 | return 0; | ||
295 | } | ||
296 | |||
297 | static int mt2266_release(struct dvb_frontend *fe) | ||
298 | { | ||
299 | kfree(fe->tuner_priv); | ||
300 | fe->tuner_priv = NULL; | ||
301 | return 0; | ||
302 | } | ||
303 | |||
304 | static const struct dvb_tuner_ops mt2266_tuner_ops = { | ||
305 | .info = { | ||
306 | .name = "Microtune MT2266", | ||
307 | .frequency_min = 174000000, | ||
308 | .frequency_max = 862000000, | ||
309 | .frequency_step = 50000, | ||
310 | }, | ||
311 | .release = mt2266_release, | ||
312 | .init = mt2266_init, | ||
313 | .sleep = mt2266_sleep, | ||
314 | .set_params = mt2266_set_params, | ||
315 | .get_frequency = mt2266_get_frequency, | ||
316 | .get_bandwidth = mt2266_get_bandwidth | ||
317 | }; | ||
318 | |||
319 | struct dvb_frontend * mt2266_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct mt2266_config *cfg) | ||
320 | { | ||
321 | struct mt2266_priv *priv = NULL; | ||
322 | u8 id = 0; | ||
323 | |||
324 | priv = kzalloc(sizeof(struct mt2266_priv), GFP_KERNEL); | ||
325 | if (priv == NULL) | ||
326 | return NULL; | ||
327 | |||
328 | priv->cfg = cfg; | ||
329 | priv->i2c = i2c; | ||
330 | priv->band = MT2266_UHF; | ||
331 | |||
332 | if (mt2266_readreg(priv, 0, &id)) { | ||
333 | kfree(priv); | ||
334 | return NULL; | ||
335 | } | ||
336 | if (id != PART_REV) { | ||
337 | kfree(priv); | ||
338 | return NULL; | ||
339 | } | ||
340 | printk(KERN_INFO "MT2266: successfully identified\n"); | ||
341 | memcpy(&fe->ops.tuner_ops, &mt2266_tuner_ops, sizeof(struct dvb_tuner_ops)); | ||
342 | |||
343 | fe->tuner_priv = priv; | ||
344 | mt2266_calibrate(priv); | ||
345 | return fe; | ||
346 | } | ||
347 | EXPORT_SYMBOL(mt2266_attach); | ||
348 | |||
349 | MODULE_AUTHOR("Olivier DANET"); | ||
350 | MODULE_DESCRIPTION("Microtune MT2266 silicon tuner driver"); | ||
351 | MODULE_LICENSE("GPL"); | ||