1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22#include <linux/module.h>
23#include <linux/moduleparam.h>
24#include <linux/videodev2.h>
25#include <linux/delay.h>
26#include <linux/dvb/frontend.h>
27#include <linux/i2c.h>
28#include <linux/slab.h>
29
30#include "dvb_frontend.h"
31
32#include "max2165.h"
33#include "max2165_priv.h"
34#include "tuner-i2c.h"
35
36#define dprintk(args...) \
37 do { \
38 if (debug) \
39 printk(KERN_DEBUG "max2165: " args); \
40 } while (0)
41
42static int debug;
43module_param(debug, int, 0644);
44MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
45
46static int max2165_write_reg(struct max2165_priv *priv, u8 reg, u8 data)
47{
48 int ret;
49 u8 buf[] = { reg, data };
50 struct i2c_msg msg = { .flags = 0, .buf = buf, .len = 2 };
51
52 msg.addr = priv->config->i2c_address;
53
54 if (debug >= 2)
55 dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, data);
56
57 ret = i2c_transfer(priv->i2c, &msg, 1);
58
59 if (ret != 1)
60 dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n",
61 __func__, reg, data, ret);
62
63 return (ret != 1) ? -EIO : 0;
64}
65
66static int max2165_read_reg(struct max2165_priv *priv, u8 reg, u8 *p_data)
67{
68 int ret;
69 u8 dev_addr = priv->config->i2c_address;
70
71 u8 b0[] = { reg };
72 u8 b1[] = { 0 };
73 struct i2c_msg msg[] = {
74 { .addr = dev_addr, .flags = 0, .buf = b0, .len = 1 },
75 { .addr = dev_addr, .flags = I2C_M_RD, .buf = b1, .len = 1 },
76 };
77
78 ret = i2c_transfer(priv->i2c, msg, 2);
79 if (ret != 2) {
80 dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg, ret);
81 return -EIO;
82 }
83
84 *p_data = b1[0];
85 if (debug >= 2)
86 dprintk("%s: reg=0x%02X, data=0x%02X\n",
87 __func__, reg, b1[0]);
88 return 0;
89}
90
91static int max2165_mask_write_reg(struct max2165_priv *priv, u8 reg,
92 u8 mask, u8 data)
93{
94 int ret;
95 u8 v;
96
97 data &= mask;
98 ret = max2165_read_reg(priv, reg, &v);
99 if (ret != 0)
100 return ret;
101 v &= ~mask;
102 v |= data;
103 ret = max2165_write_reg(priv, reg, v);
104
105 return ret;
106}
107
108static int max2165_read_rom_table(struct max2165_priv *priv)
109{
110 u8 dat[3];
111 int i;
112
113 for (i = 0; i < 3; i++) {
114 max2165_write_reg(priv, REG_ROM_TABLE_ADDR, i + 1);
115 max2165_read_reg(priv, REG_ROM_TABLE_DATA, &dat[i]);
116 }
117
118 priv->tf_ntch_low_cfg = dat[0] >> 4;
119 priv->tf_ntch_hi_cfg = dat[0] & 0x0F;
120 priv->tf_balun_low_ref = dat[1] & 0x0F;
121 priv->tf_balun_hi_ref = dat[1] >> 4;
122 priv->bb_filter_7mhz_cfg = dat[2] & 0x0F;
123 priv->bb_filter_8mhz_cfg = dat[2] >> 4;
124
125 dprintk("tf_ntch_low_cfg = 0x%X\n", priv->tf_ntch_low_cfg);
126 dprintk("tf_ntch_hi_cfg = 0x%X\n", priv->tf_ntch_hi_cfg);
127 dprintk("tf_balun_low_ref = 0x%X\n", priv->tf_balun_low_ref);
128 dprintk("tf_balun_hi_ref = 0x%X\n", priv->tf_balun_hi_ref);
129 dprintk("bb_filter_7mhz_cfg = 0x%X\n", priv->bb_filter_7mhz_cfg);
130 dprintk("bb_filter_8mhz_cfg = 0x%X\n", priv->bb_filter_8mhz_cfg);
131
132 return 0;
133}
134
135static int max2165_set_osc(struct max2165_priv *priv, u8 osc )
136{
137 u8 v;
138
139 v = (osc / 2);
140 if (v == 2)
141 v = 0x7;
142 else
143 v -= 8;
144
145 max2165_mask_write_reg(priv, REG_PLL_CFG, 0x07, v);
146
147 return 0;
148}
149
150static int max2165_set_bandwidth(struct max2165_priv *priv, u32 bw)
151{
152 u8 val;
153
154 if (bw == 8000000)
155 val = priv->bb_filter_8mhz_cfg;
156 else
157 val = priv->bb_filter_7mhz_cfg;
158
159 max2165_mask_write_reg(priv, REG_BASEBAND_CTRL, 0xF0, val << 4);
160
161 return 0;
162}
163
164static int fixpt_div32(u32 dividend, u32 divisor, u32 *quotient, u32 *fraction)
165{
166 u32 remainder;
167 u32 q, f = 0;
168 int i;
169
170 if (0 == divisor)
171 return -EINVAL;
172
173 q = dividend / divisor;
174 remainder = dividend - q * divisor;
175
176 for (i = 0; i < 31; i++) {
177 remainder <<= 1;
178 if (remainder >= divisor) {
179 f += 1;
180 remainder -= divisor;
181 }
182 f <<= 1;
183 }
184
185 *quotient = q;
186 *fraction = f;
187
188 return 0;
189}
190
191static int max2165_set_rf(struct max2165_priv *priv, u32 freq)
192{
193 u8 tf;
194 u8 tf_ntch;
195 u32 t;
196 u32 quotient, fraction;
197 int ret;
198
199
200 ret = fixpt_div32(freq / 1000, priv->config->osc_clk * 1000,
201 "ient, &fraction);
202 if (ret != 0)
203 return ret;
204
205
206 fraction >>= 12;
207
208 max2165_write_reg(priv, REG_NDIV_INT, quotient);
209 max2165_mask_write_reg(priv, REG_NDIV_FRAC2, 0x0F, fraction >> 16);
210 max2165_write_reg(priv, REG_NDIV_FRAC1, fraction >> 8);
211 max2165_write_reg(priv, REG_NDIV_FRAC0, fraction);
212
213
214 tf_ntch = (freq < 725000000) ?
215 priv->tf_ntch_low_cfg : priv->tf_ntch_hi_cfg;
216
217
218 t = priv->tf_balun_low_ref;
219 t += (priv->tf_balun_hi_ref - priv->tf_balun_low_ref)
220 * (freq / 1000 - 470000) / (780000 - 470000);
221
222 tf = t;
223 dprintk("tf = %X\n", tf);
224 tf |= tf_ntch << 4;
225
226 max2165_write_reg(priv, REG_TRACK_FILTER, tf);
227
228 return 0;
229}
230
231static void max2165_debug_status(struct max2165_priv *priv)
232{
233 u8 status, autotune;
234 u8 auto_vco_success, auto_vco_active;
235 u8 pll_locked;
236 u8 dc_offset_low, dc_offset_hi;
237 u8 signal_lv_over_threshold;
238 u8 vco, vco_sub_band, adc;
239
240 max2165_read_reg(priv, REG_STATUS, &status);
241 max2165_read_reg(priv, REG_AUTOTUNE, &autotune);
242
243 auto_vco_success = (status >> 6) & 0x01;
244 auto_vco_active = (status >> 5) & 0x01;
245 pll_locked = (status >> 4) & 0x01;
246 dc_offset_low = (status >> 3) & 0x01;
247 dc_offset_hi = (status >> 2) & 0x01;
248 signal_lv_over_threshold = status & 0x01;
249
250 vco = autotune >> 6;
251 vco_sub_band = (autotune >> 3) & 0x7;
252 adc = autotune & 0x7;
253
254 dprintk("auto VCO active: %d, auto VCO success: %d\n",
255 auto_vco_active, auto_vco_success);
256 dprintk("PLL locked: %d\n", pll_locked);
257 dprintk("DC offset low: %d, DC offset high: %d\n",
258 dc_offset_low, dc_offset_hi);
259 dprintk("Signal lvl over threshold: %d\n", signal_lv_over_threshold);
260 dprintk("VCO: %d, VCO Sub-band: %d, ADC: %d\n", vco, vco_sub_band, adc);
261}
262
263static int max2165_set_params(struct dvb_frontend *fe)
264{
265 struct max2165_priv *priv = fe->tuner_priv;
266 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
267 int ret;
268
269 switch (c->bandwidth_hz) {
270 case 7000000:
271 case 8000000:
272 priv->frequency = c->frequency;
273 break;
274 default:
275 printk(KERN_INFO "MAX2165: bandwidth %d Hz not supported.\n",
276 c->bandwidth_hz);
277 return -EINVAL;
278 }
279
280 dprintk("%s() frequency=%d\n", __func__, c->frequency);
281
282 if (fe->ops.i2c_gate_ctrl)
283 fe->ops.i2c_gate_ctrl(fe, 1);
284 max2165_set_bandwidth(priv, c->bandwidth_hz);
285 ret = max2165_set_rf(priv, priv->frequency);
286 mdelay(50);
287 max2165_debug_status(priv);
288 if (fe->ops.i2c_gate_ctrl)
289 fe->ops.i2c_gate_ctrl(fe, 0);
290
291 if (ret != 0)
292 return -EREMOTEIO;
293
294 return 0;
295}
296
297static int max2165_get_frequency(struct dvb_frontend *fe, u32 *freq)
298{
299 struct max2165_priv *priv = fe->tuner_priv;
300 dprintk("%s()\n", __func__);
301 *freq = priv->frequency;
302 return 0;
303}
304
305static int max2165_get_bandwidth(struct dvb_frontend *fe, u32 *bw)
306{
307 struct max2165_priv *priv = fe->tuner_priv;
308 dprintk("%s()\n", __func__);
309
310 *bw = priv->bandwidth;
311 return 0;
312}
313
314static int max2165_get_status(struct dvb_frontend *fe, u32 *status)
315{
316 struct max2165_priv *priv = fe->tuner_priv;
317 u16 lock_status = 0;
318
319 dprintk("%s()\n", __func__);
320
321 if (fe->ops.i2c_gate_ctrl)
322 fe->ops.i2c_gate_ctrl(fe, 1);
323
324 max2165_debug_status(priv);
325 *status = lock_status;
326
327 if (fe->ops.i2c_gate_ctrl)
328 fe->ops.i2c_gate_ctrl(fe, 0);
329
330 return 0;
331}
332
333static int max2165_sleep(struct dvb_frontend *fe)
334{
335 dprintk("%s()\n", __func__);
336 return 0;
337}
338
339static int max2165_init(struct dvb_frontend *fe)
340{
341 struct max2165_priv *priv = fe->tuner_priv;
342 dprintk("%s()\n", __func__);
343
344 if (fe->ops.i2c_gate_ctrl)
345 fe->ops.i2c_gate_ctrl(fe, 1);
346
347
348
349 max2165_write_reg(priv, REG_NDIV_FRAC2, 0x18);
350
351 max2165_write_reg(priv, REG_LNA, 0x01);
352 max2165_write_reg(priv, REG_PLL_CFG, 0x7A);
353 max2165_write_reg(priv, REG_TEST, 0x08);
354 max2165_write_reg(priv, REG_SHUTDOWN, 0x40);
355 max2165_write_reg(priv, REG_VCO_CTRL, 0x84);
356 max2165_write_reg(priv, REG_BASEBAND_CTRL, 0xC3);
357 max2165_write_reg(priv, REG_DC_OFFSET_CTRL, 0x75);
358 max2165_write_reg(priv, REG_DC_OFFSET_DAC, 0x00);
359 max2165_write_reg(priv, REG_ROM_TABLE_ADDR, 0x00);
360
361 max2165_set_osc(priv, priv->config->osc_clk);
362
363 max2165_read_rom_table(priv);
364
365 max2165_set_bandwidth(priv, 8000000);
366
367 if (fe->ops.i2c_gate_ctrl)
368 fe->ops.i2c_gate_ctrl(fe, 0);
369
370 return 0;
371}
372
373static int max2165_release(struct dvb_frontend *fe)
374{
375 struct max2165_priv *priv = fe->tuner_priv;
376 dprintk("%s()\n", __func__);
377
378 kfree(priv);
379 fe->tuner_priv = NULL;
380
381 return 0;
382}
383
384static const struct dvb_tuner_ops max2165_tuner_ops = {
385 .info = {
386 .name = "Maxim MAX2165",
387 .frequency_min = 470000000,
388 .frequency_max = 862000000,
389 .frequency_step = 50000,
390 },
391
392 .release = max2165_release,
393 .init = max2165_init,
394 .sleep = max2165_sleep,
395
396 .set_params = max2165_set_params,
397 .set_analog_params = NULL,
398 .get_frequency = max2165_get_frequency,
399 .get_bandwidth = max2165_get_bandwidth,
400 .get_status = max2165_get_status
401};
402
403struct dvb_frontend *max2165_attach(struct dvb_frontend *fe,
404 struct i2c_adapter *i2c,
405 struct max2165_config *cfg)
406{
407 struct max2165_priv *priv = NULL;
408
409 dprintk("%s(%d-%04x)\n", __func__,
410 i2c ? i2c_adapter_id(i2c) : -1,
411 cfg ? cfg->i2c_address : -1);
412
413 priv = kzalloc(sizeof(struct max2165_priv), GFP_KERNEL);
414 if (priv == NULL)
415 return NULL;
416
417 memcpy(&fe->ops.tuner_ops, &max2165_tuner_ops,
418 sizeof(struct dvb_tuner_ops));
419
420 priv->config = cfg;
421 priv->i2c = i2c;
422 fe->tuner_priv = priv;
423
424 max2165_init(fe);
425 max2165_debug_status(priv);
426
427 return fe;
428}
429EXPORT_SYMBOL(max2165_attach);
430
431MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>");
432MODULE_DESCRIPTION("Maxim MAX2165 silicon tuner driver");
433MODULE_LICENSE("GPL");
434
