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f47623a0 ST |
1 | /* |
2 | * Driver for Microtune MT2131 "QAM/8VSB single chip tuner" | |
3 | * | |
6d897616 | 4 | * Copyright (c) 2006 Steven Toth <stoth@linuxtv.org> |
f47623a0 ST |
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> | |
f47623a0 ST |
23 | #include <linux/delay.h> |
24 | #include <linux/dvb/frontend.h> | |
25 | #include <linux/i2c.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
f47623a0 ST |
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] = { | |
3873dd04 MK |
56 | { .addr = priv->cfg->i2c_address, .flags = 0, |
57 | .buf = ®, .len = 1 }, | |
58 | { .addr = priv->cfg->i2c_address, .flags = I2C_M_RD, | |
59 | .buf = val, .len = 1 }, | |
f47623a0 ST |
60 | }; |
61 | ||
62 | if (i2c_transfer(priv->i2c, msg, 2) != 2) { | |
63 | printk(KERN_WARNING "mt2131 I2C read failed\n"); | |
64 | return -EREMOTEIO; | |
65 | } | |
66 | return 0; | |
67 | } | |
68 | ||
69 | static int mt2131_writereg(struct mt2131_priv *priv, u8 reg, u8 val) | |
70 | { | |
71 | u8 buf[2] = { reg, val }; | |
3873dd04 MK |
72 | struct i2c_msg msg = { .addr = priv->cfg->i2c_address, .flags = 0, |
73 | .buf = buf, .len = 2 }; | |
f47623a0 ST |
74 | |
75 | if (i2c_transfer(priv->i2c, &msg, 1) != 1) { | |
76 | printk(KERN_WARNING "mt2131 I2C write failed\n"); | |
77 | return -EREMOTEIO; | |
78 | } | |
79 | return 0; | |
80 | } | |
81 | ||
82 | static int mt2131_writeregs(struct mt2131_priv *priv,u8 *buf, u8 len) | |
83 | { | |
3873dd04 MK |
84 | struct i2c_msg msg = { .addr = priv->cfg->i2c_address, |
85 | .flags = 0, .buf = buf, .len = len }; | |
f47623a0 ST |
86 | |
87 | if (i2c_transfer(priv->i2c, &msg, 1) != 1) { | |
3873dd04 MK |
88 | printk(KERN_WARNING "mt2131 I2C write failed (len=%i)\n", |
89 | (int)len); | |
f47623a0 ST |
90 | return -EREMOTEIO; |
91 | } | |
92 | return 0; | |
93 | } | |
94 | ||
14d24d14 | 95 | static int mt2131_set_params(struct dvb_frontend *fe) |
f47623a0 | 96 | { |
01ce5a79 | 97 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
f47623a0 ST |
98 | struct mt2131_priv *priv; |
99 | int ret=0, i; | |
100 | u32 freq; | |
101 | u8 if_band_center; | |
3873dd04 MK |
102 | u32 f_lo1, f_lo2; |
103 | u32 div1, num1, div2, num2; | |
f47623a0 ST |
104 | u8 b[8]; |
105 | u8 lockval = 0; | |
106 | ||
107 | priv = fe->tuner_priv; | |
f47623a0 | 108 | |
01ce5a79 | 109 | freq = c->frequency / 1000; /* Hz -> kHz */ |
271ddbf7 | 110 | dprintk(1, "%s() freq=%d\n", __func__, freq); |
f47623a0 ST |
111 | |
112 | f_lo1 = freq + MT2131_IF1 * 1000; | |
113 | f_lo1 = (f_lo1 / 250) * 250; | |
114 | f_lo2 = f_lo1 - freq - MT2131_IF2; | |
115 | ||
195ccf67 | 116 | priv->frequency = (f_lo1 - f_lo2 - MT2131_IF2) * 1000; |
f47623a0 ST |
117 | |
118 | /* Frequency LO1 = 16MHz * (DIV1 + NUM1/8192 ) */ | |
119 | num1 = f_lo1 * 64 / (MT2131_FREF / 128); | |
120 | div1 = num1 / 8192; | |
121 | num1 &= 0x1fff; | |
122 | ||
123 | /* Frequency LO2 = 16MHz * (DIV2 + NUM2/8192 ) */ | |
124 | num2 = f_lo2 * 64 / (MT2131_FREF / 128); | |
125 | div2 = num2 / 8192; | |
126 | num2 &= 0x1fff; | |
127 | ||
128 | if (freq <= 82500) if_band_center = 0x00; else | |
129 | if (freq <= 137500) if_band_center = 0x01; else | |
130 | if (freq <= 192500) if_band_center = 0x02; else | |
131 | if (freq <= 247500) if_band_center = 0x03; else | |
132 | if (freq <= 302500) if_band_center = 0x04; else | |
133 | if (freq <= 357500) if_band_center = 0x05; else | |
134 | if (freq <= 412500) if_band_center = 0x06; else | |
135 | if (freq <= 467500) if_band_center = 0x07; else | |
136 | if (freq <= 522500) if_band_center = 0x08; else | |
137 | if (freq <= 577500) if_band_center = 0x09; else | |
138 | if (freq <= 632500) if_band_center = 0x0A; else | |
139 | if (freq <= 687500) if_band_center = 0x0B; else | |
140 | if (freq <= 742500) if_band_center = 0x0C; else | |
141 | if (freq <= 797500) if_band_center = 0x0D; else | |
142 | if (freq <= 852500) if_band_center = 0x0E; else | |
143 | if (freq <= 907500) if_band_center = 0x0F; else | |
144 | if (freq <= 962500) if_band_center = 0x10; else | |
145 | if (freq <= 1017500) if_band_center = 0x11; else | |
146 | if (freq <= 1072500) if_band_center = 0x12; else if_band_center = 0x13; | |
147 | ||
148 | b[0] = 1; | |
149 | b[1] = (num1 >> 5) & 0xFF; | |
150 | b[2] = (num1 & 0x1F); | |
151 | b[3] = div1; | |
152 | b[4] = (num2 >> 5) & 0xFF; | |
153 | b[5] = num2 & 0x1F; | |
154 | b[6] = div2; | |
155 | ||
156 | dprintk(1, "IF1: %dMHz IF2: %dMHz\n", MT2131_IF1, MT2131_IF2); | |
157 | dprintk(1, "PLL freq=%dkHz band=%d\n", (int)freq, (int)if_band_center); | |
158 | dprintk(1, "PLL f_lo1=%dkHz f_lo2=%dkHz\n", (int)f_lo1, (int)f_lo2); | |
159 | dprintk(1, "PLL div1=%d num1=%d div2=%d num2=%d\n", | |
160 | (int)div1, (int)num1, (int)div2, (int)num2); | |
161 | dprintk(1, "PLL [1..6]: %2x %2x %2x %2x %2x %2x\n", | |
162 | (int)b[1], (int)b[2], (int)b[3], (int)b[4], (int)b[5], | |
163 | (int)b[6]); | |
164 | ||
165 | ret = mt2131_writeregs(priv,b,7); | |
166 | if (ret < 0) | |
167 | return ret; | |
168 | ||
169 | mt2131_writereg(priv, 0x0b, if_band_center); | |
170 | ||
171 | /* Wait for lock */ | |
172 | i = 0; | |
173 | do { | |
174 | mt2131_readreg(priv, 0x08, &lockval); | |
175 | if ((lockval & 0x88) == 0x88) | |
176 | break; | |
177 | msleep(4); | |
178 | i++; | |
179 | } while (i < 10); | |
180 | ||
181 | return ret; | |
182 | } | |
183 | ||
184 | static int mt2131_get_frequency(struct dvb_frontend *fe, u32 *frequency) | |
185 | { | |
186 | struct mt2131_priv *priv = fe->tuner_priv; | |
271ddbf7 | 187 | dprintk(1, "%s()\n", __func__); |
f47623a0 ST |
188 | *frequency = priv->frequency; |
189 | return 0; | |
190 | } | |
191 | ||
f47623a0 ST |
192 | static int mt2131_get_status(struct dvb_frontend *fe, u32 *status) |
193 | { | |
194 | struct mt2131_priv *priv = fe->tuner_priv; | |
195 | u8 lock_status = 0; | |
196 | u8 afc_status = 0; | |
197 | ||
198 | *status = 0; | |
199 | ||
200 | mt2131_readreg(priv, 0x08, &lock_status); | |
201 | if ((lock_status & 0x88) == 0x88) | |
202 | *status = TUNER_STATUS_LOCKED; | |
203 | ||
204 | mt2131_readreg(priv, 0x09, &afc_status); | |
205 | dprintk(1, "%s() - LO Status = 0x%x, AFC Status = 0x%x\n", | |
271ddbf7 | 206 | __func__, lock_status, afc_status); |
f47623a0 ST |
207 | |
208 | return 0; | |
209 | } | |
210 | ||
211 | static int mt2131_init(struct dvb_frontend *fe) | |
212 | { | |
213 | struct mt2131_priv *priv = fe->tuner_priv; | |
214 | int ret; | |
271ddbf7 | 215 | dprintk(1, "%s()\n", __func__); |
f47623a0 | 216 | |
3873dd04 MK |
217 | if ((ret = mt2131_writeregs(priv, mt2131_config1, |
218 | sizeof(mt2131_config1))) < 0) | |
f47623a0 ST |
219 | return ret; |
220 | ||
221 | mt2131_writereg(priv, 0x0b, 0x09); | |
222 | mt2131_writereg(priv, 0x15, 0x47); | |
223 | mt2131_writereg(priv, 0x07, 0xf2); | |
224 | mt2131_writereg(priv, 0x0b, 0x01); | |
225 | ||
3873dd04 MK |
226 | if ((ret = mt2131_writeregs(priv, mt2131_config2, |
227 | sizeof(mt2131_config2))) < 0) | |
f47623a0 ST |
228 | return ret; |
229 | ||
230 | return ret; | |
231 | } | |
232 | ||
233 | static int mt2131_release(struct dvb_frontend *fe) | |
234 | { | |
271ddbf7 | 235 | dprintk(1, "%s()\n", __func__); |
f47623a0 ST |
236 | kfree(fe->tuner_priv); |
237 | fe->tuner_priv = NULL; | |
238 | return 0; | |
239 | } | |
240 | ||
241 | static const struct dvb_tuner_ops mt2131_tuner_ops = { | |
242 | .info = { | |
243 | .name = "Microtune MT2131", | |
244 | .frequency_min = 48000000, | |
245 | .frequency_max = 860000000, | |
246 | .frequency_step = 50000, | |
247 | }, | |
248 | ||
249 | .release = mt2131_release, | |
250 | .init = mt2131_init, | |
251 | ||
252 | .set_params = mt2131_set_params, | |
253 | .get_frequency = mt2131_get_frequency, | |
f47623a0 ST |
254 | .get_status = mt2131_get_status |
255 | }; | |
256 | ||
3873dd04 MK |
257 | struct dvb_frontend * mt2131_attach(struct dvb_frontend *fe, |
258 | struct i2c_adapter *i2c, | |
259 | struct mt2131_config *cfg, u16 if1) | |
f47623a0 ST |
260 | { |
261 | struct mt2131_priv *priv = NULL; | |
262 | u8 id = 0; | |
263 | ||
271ddbf7 | 264 | dprintk(1, "%s()\n", __func__); |
f47623a0 ST |
265 | |
266 | priv = kzalloc(sizeof(struct mt2131_priv), GFP_KERNEL); | |
267 | if (priv == NULL) | |
268 | return NULL; | |
269 | ||
270 | priv->cfg = cfg; | |
f47623a0 ST |
271 | priv->i2c = i2c; |
272 | ||
273 | if (mt2131_readreg(priv, 0, &id) != 0) { | |
274 | kfree(priv); | |
275 | return NULL; | |
276 | } | |
277 | if ( (id != 0x3E) && (id != 0x3F) ) { | |
3873dd04 MK |
278 | printk(KERN_ERR "MT2131: Device not found at addr 0x%02x\n", |
279 | cfg->i2c_address); | |
f47623a0 ST |
280 | kfree(priv); |
281 | return NULL; | |
282 | } | |
283 | ||
3873dd04 MK |
284 | printk(KERN_INFO "MT2131: successfully identified at address 0x%02x\n", |
285 | cfg->i2c_address); | |
286 | memcpy(&fe->ops.tuner_ops, &mt2131_tuner_ops, | |
287 | sizeof(struct dvb_tuner_ops)); | |
f47623a0 ST |
288 | |
289 | fe->tuner_priv = priv; | |
290 | return fe; | |
291 | } | |
292 | EXPORT_SYMBOL(mt2131_attach); | |
293 | ||
294 | MODULE_AUTHOR("Steven Toth"); | |
295 | MODULE_DESCRIPTION("Microtune MT2131 silicon tuner driver"); | |
296 | MODULE_LICENSE("GPL"); |