This source file includes following definitions.
- mt2131_readreg
- mt2131_writereg
- mt2131_writeregs
- mt2131_set_params
- mt2131_get_frequency
- mt2131_get_status
- mt2131_init
- mt2131_release
- mt2131_attach
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8 #include <linux/module.h>
9 #include <linux/delay.h>
10 #include <linux/dvb/frontend.h>
11 #include <linux/i2c.h>
12 #include <linux/slab.h>
13
14 #include <media/dvb_frontend.h>
15
16 #include "mt2131.h"
17 #include "mt2131_priv.h"
18
19 static int debug;
20 module_param(debug, int, 0644);
21 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
22
23 #define dprintk(level,fmt, arg...) if (debug >= level) \
24 printk(KERN_INFO "%s: " fmt, "mt2131", ## arg)
25
26 static u8 mt2131_config1[] = {
27 0x01,
28 0x50, 0x00, 0x50, 0x80, 0x00, 0x49, 0xfa, 0x88,
29 0x08, 0x77, 0x41, 0x04, 0x00, 0x00, 0x00, 0x32,
30 0x7f, 0xda, 0x4c, 0x00, 0x10, 0xaa, 0x78, 0x80,
31 0xff, 0x68, 0xa0, 0xff, 0xdd, 0x00, 0x00
32 };
33
34 static u8 mt2131_config2[] = {
35 0x10,
36 0x7f, 0xc8, 0x0a, 0x5f, 0x00, 0x04
37 };
38
39 static int mt2131_readreg(struct mt2131_priv *priv, u8 reg, u8 *val)
40 {
41 struct i2c_msg msg[2] = {
42 { .addr = priv->cfg->i2c_address, .flags = 0,
43 .buf = ®, .len = 1 },
44 { .addr = priv->cfg->i2c_address, .flags = I2C_M_RD,
45 .buf = val, .len = 1 },
46 };
47
48 if (i2c_transfer(priv->i2c, msg, 2) != 2) {
49 printk(KERN_WARNING "mt2131 I2C read failed\n");
50 return -EREMOTEIO;
51 }
52 return 0;
53 }
54
55 static int mt2131_writereg(struct mt2131_priv *priv, u8 reg, u8 val)
56 {
57 u8 buf[2] = { reg, val };
58 struct i2c_msg msg = { .addr = priv->cfg->i2c_address, .flags = 0,
59 .buf = buf, .len = 2 };
60
61 if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
62 printk(KERN_WARNING "mt2131 I2C write failed\n");
63 return -EREMOTEIO;
64 }
65 return 0;
66 }
67
68 static int mt2131_writeregs(struct mt2131_priv *priv,u8 *buf, u8 len)
69 {
70 struct i2c_msg msg = { .addr = priv->cfg->i2c_address,
71 .flags = 0, .buf = buf, .len = len };
72
73 if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
74 printk(KERN_WARNING "mt2131 I2C write failed (len=%i)\n",
75 (int)len);
76 return -EREMOTEIO;
77 }
78 return 0;
79 }
80
81 static int mt2131_set_params(struct dvb_frontend *fe)
82 {
83 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
84 struct mt2131_priv *priv;
85 int ret=0, i;
86 u32 freq;
87 u8 if_band_center;
88 u32 f_lo1, f_lo2;
89 u32 div1, num1, div2, num2;
90 u8 b[8];
91 u8 lockval = 0;
92
93 priv = fe->tuner_priv;
94
95 freq = c->frequency / 1000;
96 dprintk(1, "%s() freq=%d\n", __func__, freq);
97
98 f_lo1 = freq + MT2131_IF1 * 1000;
99 f_lo1 = (f_lo1 / 250) * 250;
100 f_lo2 = f_lo1 - freq - MT2131_IF2;
101
102 priv->frequency = (f_lo1 - f_lo2 - MT2131_IF2) * 1000;
103
104
105 num1 = f_lo1 * 64 / (MT2131_FREF / 128);
106 div1 = num1 / 8192;
107 num1 &= 0x1fff;
108
109
110 num2 = f_lo2 * 64 / (MT2131_FREF / 128);
111 div2 = num2 / 8192;
112 num2 &= 0x1fff;
113
114 if (freq <= 82500) if_band_center = 0x00; else
115 if (freq <= 137500) if_band_center = 0x01; else
116 if (freq <= 192500) if_band_center = 0x02; else
117 if (freq <= 247500) if_band_center = 0x03; else
118 if (freq <= 302500) if_band_center = 0x04; else
119 if (freq <= 357500) if_band_center = 0x05; else
120 if (freq <= 412500) if_band_center = 0x06; else
121 if (freq <= 467500) if_band_center = 0x07; else
122 if (freq <= 522500) if_band_center = 0x08; else
123 if (freq <= 577500) if_band_center = 0x09; else
124 if (freq <= 632500) if_band_center = 0x0A; else
125 if (freq <= 687500) if_band_center = 0x0B; else
126 if (freq <= 742500) if_band_center = 0x0C; else
127 if (freq <= 797500) if_band_center = 0x0D; else
128 if (freq <= 852500) if_band_center = 0x0E; else
129 if (freq <= 907500) if_band_center = 0x0F; else
130 if (freq <= 962500) if_band_center = 0x10; else
131 if (freq <= 1017500) if_band_center = 0x11; else
132 if (freq <= 1072500) if_band_center = 0x12; else if_band_center = 0x13;
133
134 b[0] = 1;
135 b[1] = (num1 >> 5) & 0xFF;
136 b[2] = (num1 & 0x1F);
137 b[3] = div1;
138 b[4] = (num2 >> 5) & 0xFF;
139 b[5] = num2 & 0x1F;
140 b[6] = div2;
141
142 dprintk(1, "IF1: %dMHz IF2: %dMHz\n", MT2131_IF1, MT2131_IF2);
143 dprintk(1, "PLL freq=%dkHz band=%d\n", (int)freq, (int)if_band_center);
144 dprintk(1, "PLL f_lo1=%dkHz f_lo2=%dkHz\n", (int)f_lo1, (int)f_lo2);
145 dprintk(1, "PLL div1=%d num1=%d div2=%d num2=%d\n",
146 (int)div1, (int)num1, (int)div2, (int)num2);
147 dprintk(1, "PLL [1..6]: %2x %2x %2x %2x %2x %2x\n",
148 (int)b[1], (int)b[2], (int)b[3], (int)b[4], (int)b[5],
149 (int)b[6]);
150
151 ret = mt2131_writeregs(priv,b,7);
152 if (ret < 0)
153 return ret;
154
155 mt2131_writereg(priv, 0x0b, if_band_center);
156
157
158 i = 0;
159 do {
160 mt2131_readreg(priv, 0x08, &lockval);
161 if ((lockval & 0x88) == 0x88)
162 break;
163 msleep(4);
164 i++;
165 } while (i < 10);
166
167 return ret;
168 }
169
170 static int mt2131_get_frequency(struct dvb_frontend *fe, u32 *frequency)
171 {
172 struct mt2131_priv *priv = fe->tuner_priv;
173 dprintk(1, "%s()\n", __func__);
174 *frequency = priv->frequency;
175 return 0;
176 }
177
178 static int mt2131_get_status(struct dvb_frontend *fe, u32 *status)
179 {
180 struct mt2131_priv *priv = fe->tuner_priv;
181 u8 lock_status = 0;
182 u8 afc_status = 0;
183
184 *status = 0;
185
186 mt2131_readreg(priv, 0x08, &lock_status);
187 if ((lock_status & 0x88) == 0x88)
188 *status = TUNER_STATUS_LOCKED;
189
190 mt2131_readreg(priv, 0x09, &afc_status);
191 dprintk(1, "%s() - LO Status = 0x%x, AFC Status = 0x%x\n",
192 __func__, lock_status, afc_status);
193
194 return 0;
195 }
196
197 static int mt2131_init(struct dvb_frontend *fe)
198 {
199 struct mt2131_priv *priv = fe->tuner_priv;
200 int ret;
201 dprintk(1, "%s()\n", __func__);
202
203 if ((ret = mt2131_writeregs(priv, mt2131_config1,
204 sizeof(mt2131_config1))) < 0)
205 return ret;
206
207 mt2131_writereg(priv, 0x0b, 0x09);
208 mt2131_writereg(priv, 0x15, 0x47);
209 mt2131_writereg(priv, 0x07, 0xf2);
210 mt2131_writereg(priv, 0x0b, 0x01);
211
212 if ((ret = mt2131_writeregs(priv, mt2131_config2,
213 sizeof(mt2131_config2))) < 0)
214 return ret;
215
216 return ret;
217 }
218
219 static void mt2131_release(struct dvb_frontend *fe)
220 {
221 dprintk(1, "%s()\n", __func__);
222 kfree(fe->tuner_priv);
223 fe->tuner_priv = NULL;
224 }
225
226 static const struct dvb_tuner_ops mt2131_tuner_ops = {
227 .info = {
228 .name = "Microtune MT2131",
229 .frequency_min_hz = 48 * MHz,
230 .frequency_max_hz = 860 * MHz,
231 .frequency_step_hz = 50 * kHz,
232 },
233
234 .release = mt2131_release,
235 .init = mt2131_init,
236
237 .set_params = mt2131_set_params,
238 .get_frequency = mt2131_get_frequency,
239 .get_status = mt2131_get_status
240 };
241
242 struct dvb_frontend * mt2131_attach(struct dvb_frontend *fe,
243 struct i2c_adapter *i2c,
244 struct mt2131_config *cfg, u16 if1)
245 {
246 struct mt2131_priv *priv = NULL;
247 u8 id = 0;
248
249 dprintk(1, "%s()\n", __func__);
250
251 priv = kzalloc(sizeof(struct mt2131_priv), GFP_KERNEL);
252 if (priv == NULL)
253 return NULL;
254
255 priv->cfg = cfg;
256 priv->i2c = i2c;
257
258 if (mt2131_readreg(priv, 0, &id) != 0) {
259 kfree(priv);
260 return NULL;
261 }
262 if ( (id != 0x3E) && (id != 0x3F) ) {
263 printk(KERN_ERR "MT2131: Device not found at addr 0x%02x\n",
264 cfg->i2c_address);
265 kfree(priv);
266 return NULL;
267 }
268
269 printk(KERN_INFO "MT2131: successfully identified at address 0x%02x\n",
270 cfg->i2c_address);
271 memcpy(&fe->ops.tuner_ops, &mt2131_tuner_ops,
272 sizeof(struct dvb_tuner_ops));
273
274 fe->tuner_priv = priv;
275 return fe;
276 }
277 EXPORT_SYMBOL(mt2131_attach);
278
279 MODULE_AUTHOR("Steven Toth");
280 MODULE_DESCRIPTION("Microtune MT2131 silicon tuner driver");
281 MODULE_LICENSE("GPL");