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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. | |
f47623a0 ST |
16 | */ |
17 | ||
18 | #include <linux/module.h> | |
f47623a0 ST |
19 | #include <linux/delay.h> |
20 | #include <linux/dvb/frontend.h> | |
21 | #include <linux/i2c.h> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
f47623a0 | 23 | |
fada1935 | 24 | #include <media/dvb_frontend.h> |
f47623a0 ST |
25 | |
26 | #include "mt2131.h" | |
27 | #include "mt2131_priv.h" | |
28 | ||
29 | static int debug; | |
30 | module_param(debug, int, 0644); | |
31 | MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); | |
32 | ||
33 | #define dprintk(level,fmt, arg...) if (debug >= level) \ | |
34 | printk(KERN_INFO "%s: " fmt, "mt2131", ## arg) | |
35 | ||
36 | static u8 mt2131_config1[] = { | |
37 | 0x01, | |
38 | 0x50, 0x00, 0x50, 0x80, 0x00, 0x49, 0xfa, 0x88, | |
39 | 0x08, 0x77, 0x41, 0x04, 0x00, 0x00, 0x00, 0x32, | |
40 | 0x7f, 0xda, 0x4c, 0x00, 0x10, 0xaa, 0x78, 0x80, | |
41 | 0xff, 0x68, 0xa0, 0xff, 0xdd, 0x00, 0x00 | |
42 | }; | |
43 | ||
44 | static u8 mt2131_config2[] = { | |
45 | 0x10, | |
46 | 0x7f, 0xc8, 0x0a, 0x5f, 0x00, 0x04 | |
47 | }; | |
48 | ||
49 | static int mt2131_readreg(struct mt2131_priv *priv, u8 reg, u8 *val) | |
50 | { | |
51 | struct i2c_msg msg[2] = { | |
3873dd04 MK |
52 | { .addr = priv->cfg->i2c_address, .flags = 0, |
53 | .buf = ®, .len = 1 }, | |
54 | { .addr = priv->cfg->i2c_address, .flags = I2C_M_RD, | |
55 | .buf = val, .len = 1 }, | |
f47623a0 ST |
56 | }; |
57 | ||
58 | if (i2c_transfer(priv->i2c, msg, 2) != 2) { | |
59 | printk(KERN_WARNING "mt2131 I2C read failed\n"); | |
60 | return -EREMOTEIO; | |
61 | } | |
62 | return 0; | |
63 | } | |
64 | ||
65 | static int mt2131_writereg(struct mt2131_priv *priv, u8 reg, u8 val) | |
66 | { | |
67 | u8 buf[2] = { reg, val }; | |
3873dd04 MK |
68 | struct i2c_msg msg = { .addr = priv->cfg->i2c_address, .flags = 0, |
69 | .buf = buf, .len = 2 }; | |
f47623a0 ST |
70 | |
71 | if (i2c_transfer(priv->i2c, &msg, 1) != 1) { | |
72 | printk(KERN_WARNING "mt2131 I2C write failed\n"); | |
73 | return -EREMOTEIO; | |
74 | } | |
75 | return 0; | |
76 | } | |
77 | ||
78 | static int mt2131_writeregs(struct mt2131_priv *priv,u8 *buf, u8 len) | |
79 | { | |
3873dd04 MK |
80 | struct i2c_msg msg = { .addr = priv->cfg->i2c_address, |
81 | .flags = 0, .buf = buf, .len = len }; | |
f47623a0 ST |
82 | |
83 | if (i2c_transfer(priv->i2c, &msg, 1) != 1) { | |
3873dd04 MK |
84 | printk(KERN_WARNING "mt2131 I2C write failed (len=%i)\n", |
85 | (int)len); | |
f47623a0 ST |
86 | return -EREMOTEIO; |
87 | } | |
88 | return 0; | |
89 | } | |
90 | ||
14d24d14 | 91 | static int mt2131_set_params(struct dvb_frontend *fe) |
f47623a0 | 92 | { |
01ce5a79 | 93 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
f47623a0 ST |
94 | struct mt2131_priv *priv; |
95 | int ret=0, i; | |
96 | u32 freq; | |
97 | u8 if_band_center; | |
3873dd04 MK |
98 | u32 f_lo1, f_lo2; |
99 | u32 div1, num1, div2, num2; | |
f47623a0 ST |
100 | u8 b[8]; |
101 | u8 lockval = 0; | |
102 | ||
103 | priv = fe->tuner_priv; | |
f47623a0 | 104 | |
01ce5a79 | 105 | freq = c->frequency / 1000; /* Hz -> kHz */ |
271ddbf7 | 106 | dprintk(1, "%s() freq=%d\n", __func__, freq); |
f47623a0 ST |
107 | |
108 | f_lo1 = freq + MT2131_IF1 * 1000; | |
109 | f_lo1 = (f_lo1 / 250) * 250; | |
110 | f_lo2 = f_lo1 - freq - MT2131_IF2; | |
111 | ||
195ccf67 | 112 | priv->frequency = (f_lo1 - f_lo2 - MT2131_IF2) * 1000; |
f47623a0 ST |
113 | |
114 | /* Frequency LO1 = 16MHz * (DIV1 + NUM1/8192 ) */ | |
115 | num1 = f_lo1 * 64 / (MT2131_FREF / 128); | |
116 | div1 = num1 / 8192; | |
117 | num1 &= 0x1fff; | |
118 | ||
119 | /* Frequency LO2 = 16MHz * (DIV2 + NUM2/8192 ) */ | |
120 | num2 = f_lo2 * 64 / (MT2131_FREF / 128); | |
121 | div2 = num2 / 8192; | |
122 | num2 &= 0x1fff; | |
123 | ||
124 | if (freq <= 82500) if_band_center = 0x00; else | |
125 | if (freq <= 137500) if_band_center = 0x01; else | |
126 | if (freq <= 192500) if_band_center = 0x02; else | |
127 | if (freq <= 247500) if_band_center = 0x03; else | |
128 | if (freq <= 302500) if_band_center = 0x04; else | |
129 | if (freq <= 357500) if_band_center = 0x05; else | |
130 | if (freq <= 412500) if_band_center = 0x06; else | |
131 | if (freq <= 467500) if_band_center = 0x07; else | |
132 | if (freq <= 522500) if_band_center = 0x08; else | |
133 | if (freq <= 577500) if_band_center = 0x09; else | |
134 | if (freq <= 632500) if_band_center = 0x0A; else | |
135 | if (freq <= 687500) if_band_center = 0x0B; else | |
136 | if (freq <= 742500) if_band_center = 0x0C; else | |
137 | if (freq <= 797500) if_band_center = 0x0D; else | |
138 | if (freq <= 852500) if_band_center = 0x0E; else | |
139 | if (freq <= 907500) if_band_center = 0x0F; else | |
140 | if (freq <= 962500) if_band_center = 0x10; else | |
141 | if (freq <= 1017500) if_band_center = 0x11; else | |
142 | if (freq <= 1072500) if_band_center = 0x12; else if_band_center = 0x13; | |
143 | ||
144 | b[0] = 1; | |
145 | b[1] = (num1 >> 5) & 0xFF; | |
146 | b[2] = (num1 & 0x1F); | |
147 | b[3] = div1; | |
148 | b[4] = (num2 >> 5) & 0xFF; | |
149 | b[5] = num2 & 0x1F; | |
150 | b[6] = div2; | |
151 | ||
152 | dprintk(1, "IF1: %dMHz IF2: %dMHz\n", MT2131_IF1, MT2131_IF2); | |
153 | dprintk(1, "PLL freq=%dkHz band=%d\n", (int)freq, (int)if_band_center); | |
154 | dprintk(1, "PLL f_lo1=%dkHz f_lo2=%dkHz\n", (int)f_lo1, (int)f_lo2); | |
155 | dprintk(1, "PLL div1=%d num1=%d div2=%d num2=%d\n", | |
156 | (int)div1, (int)num1, (int)div2, (int)num2); | |
157 | dprintk(1, "PLL [1..6]: %2x %2x %2x %2x %2x %2x\n", | |
158 | (int)b[1], (int)b[2], (int)b[3], (int)b[4], (int)b[5], | |
159 | (int)b[6]); | |
160 | ||
161 | ret = mt2131_writeregs(priv,b,7); | |
162 | if (ret < 0) | |
163 | return ret; | |
164 | ||
165 | mt2131_writereg(priv, 0x0b, if_band_center); | |
166 | ||
167 | /* Wait for lock */ | |
168 | i = 0; | |
169 | do { | |
170 | mt2131_readreg(priv, 0x08, &lockval); | |
171 | if ((lockval & 0x88) == 0x88) | |
172 | break; | |
173 | msleep(4); | |
174 | i++; | |
175 | } while (i < 10); | |
176 | ||
177 | return ret; | |
178 | } | |
179 | ||
180 | static int mt2131_get_frequency(struct dvb_frontend *fe, u32 *frequency) | |
181 | { | |
182 | struct mt2131_priv *priv = fe->tuner_priv; | |
271ddbf7 | 183 | dprintk(1, "%s()\n", __func__); |
f47623a0 ST |
184 | *frequency = priv->frequency; |
185 | return 0; | |
186 | } | |
187 | ||
f47623a0 ST |
188 | static int mt2131_get_status(struct dvb_frontend *fe, u32 *status) |
189 | { | |
190 | struct mt2131_priv *priv = fe->tuner_priv; | |
191 | u8 lock_status = 0; | |
192 | u8 afc_status = 0; | |
193 | ||
194 | *status = 0; | |
195 | ||
196 | mt2131_readreg(priv, 0x08, &lock_status); | |
197 | if ((lock_status & 0x88) == 0x88) | |
198 | *status = TUNER_STATUS_LOCKED; | |
199 | ||
200 | mt2131_readreg(priv, 0x09, &afc_status); | |
201 | dprintk(1, "%s() - LO Status = 0x%x, AFC Status = 0x%x\n", | |
271ddbf7 | 202 | __func__, lock_status, afc_status); |
f47623a0 ST |
203 | |
204 | return 0; | |
205 | } | |
206 | ||
207 | static int mt2131_init(struct dvb_frontend *fe) | |
208 | { | |
209 | struct mt2131_priv *priv = fe->tuner_priv; | |
210 | int ret; | |
271ddbf7 | 211 | dprintk(1, "%s()\n", __func__); |
f47623a0 | 212 | |
3873dd04 MK |
213 | if ((ret = mt2131_writeregs(priv, mt2131_config1, |
214 | sizeof(mt2131_config1))) < 0) | |
f47623a0 ST |
215 | return ret; |
216 | ||
217 | mt2131_writereg(priv, 0x0b, 0x09); | |
218 | mt2131_writereg(priv, 0x15, 0x47); | |
219 | mt2131_writereg(priv, 0x07, 0xf2); | |
220 | mt2131_writereg(priv, 0x0b, 0x01); | |
221 | ||
3873dd04 MK |
222 | if ((ret = mt2131_writeregs(priv, mt2131_config2, |
223 | sizeof(mt2131_config2))) < 0) | |
f47623a0 ST |
224 | return ret; |
225 | ||
226 | return ret; | |
227 | } | |
228 | ||
194ced7a | 229 | static void mt2131_release(struct dvb_frontend *fe) |
f47623a0 | 230 | { |
271ddbf7 | 231 | dprintk(1, "%s()\n", __func__); |
f47623a0 ST |
232 | kfree(fe->tuner_priv); |
233 | fe->tuner_priv = NULL; | |
f47623a0 ST |
234 | } |
235 | ||
236 | static const struct dvb_tuner_ops mt2131_tuner_ops = { | |
237 | .info = { | |
a3f90c75 MCC |
238 | .name = "Microtune MT2131", |
239 | .frequency_min_hz = 48 * MHz, | |
240 | .frequency_max_hz = 860 * MHz, | |
241 | .frequency_step_hz = 50 * kHz, | |
f47623a0 ST |
242 | }, |
243 | ||
244 | .release = mt2131_release, | |
245 | .init = mt2131_init, | |
246 | ||
247 | .set_params = mt2131_set_params, | |
248 | .get_frequency = mt2131_get_frequency, | |
f47623a0 ST |
249 | .get_status = mt2131_get_status |
250 | }; | |
251 | ||
3873dd04 MK |
252 | struct dvb_frontend * mt2131_attach(struct dvb_frontend *fe, |
253 | struct i2c_adapter *i2c, | |
254 | struct mt2131_config *cfg, u16 if1) | |
f47623a0 ST |
255 | { |
256 | struct mt2131_priv *priv = NULL; | |
257 | u8 id = 0; | |
258 | ||
271ddbf7 | 259 | dprintk(1, "%s()\n", __func__); |
f47623a0 ST |
260 | |
261 | priv = kzalloc(sizeof(struct mt2131_priv), GFP_KERNEL); | |
262 | if (priv == NULL) | |
263 | return NULL; | |
264 | ||
265 | priv->cfg = cfg; | |
f47623a0 ST |
266 | priv->i2c = i2c; |
267 | ||
268 | if (mt2131_readreg(priv, 0, &id) != 0) { | |
269 | kfree(priv); | |
270 | return NULL; | |
271 | } | |
272 | if ( (id != 0x3E) && (id != 0x3F) ) { | |
3873dd04 MK |
273 | printk(KERN_ERR "MT2131: Device not found at addr 0x%02x\n", |
274 | cfg->i2c_address); | |
f47623a0 ST |
275 | kfree(priv); |
276 | return NULL; | |
277 | } | |
278 | ||
3873dd04 MK |
279 | printk(KERN_INFO "MT2131: successfully identified at address 0x%02x\n", |
280 | cfg->i2c_address); | |
281 | memcpy(&fe->ops.tuner_ops, &mt2131_tuner_ops, | |
282 | sizeof(struct dvb_tuner_ops)); | |
f47623a0 ST |
283 | |
284 | fe->tuner_priv = priv; | |
285 | return fe; | |
286 | } | |
287 | EXPORT_SYMBOL(mt2131_attach); | |
288 | ||
289 | MODULE_AUTHOR("Steven Toth"); | |
290 | MODULE_DESCRIPTION("Microtune MT2131 silicon tuner driver"); | |
291 | MODULE_LICENSE("GPL"); |