Pull utrace into release branch
[linux-2.6] / drivers / media / dvb / frontends / s5h1411.c
1 /*
2     Samsung S5H1411 VSB/QAM demodulator driver
3
4     Copyright (C) 2008 Steven Toth <stoth@linuxtv.org>
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     You should have received a copy of the GNU General Public License
17     along with this program; if not, write to the Free Software
18     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19
20 */
21
22 #include <linux/kernel.h>
23 #include <linux/init.h>
24 #include <linux/module.h>
25 #include <linux/string.h>
26 #include <linux/slab.h>
27 #include <linux/delay.h>
28 #include "dvb_frontend.h"
29 #include "s5h1411.h"
30
31 struct s5h1411_state {
32
33         struct i2c_adapter *i2c;
34
35         /* configuration settings */
36         const struct s5h1411_config *config;
37
38         struct dvb_frontend frontend;
39
40         fe_modulation_t current_modulation;
41
42         u32 current_frequency;
43         int if_freq;
44
45         u8 inversion;
46 };
47
48 static int debug;
49
50 #define dprintk(arg...) do {    \
51         if (debug)              \
52                 printk(arg);    \
53         } while (0)
54
55 /* Register values to initialise the demod, defaults to VSB */
56 static struct init_tab {
57         u8      addr;
58         u8      reg;
59         u16     data;
60 } init_tab[] = {
61         { S5H1411_I2C_TOP_ADDR, 0x00, 0x0071, },
62         { S5H1411_I2C_TOP_ADDR, 0x08, 0x0047, },
63         { S5H1411_I2C_TOP_ADDR, 0x1c, 0x0400, },
64         { S5H1411_I2C_TOP_ADDR, 0x1e, 0x0370, },
65         { S5H1411_I2C_TOP_ADDR, 0x1f, 0x342a, },
66         { S5H1411_I2C_TOP_ADDR, 0x24, 0x0231, },
67         { S5H1411_I2C_TOP_ADDR, 0x25, 0x1011, },
68         { S5H1411_I2C_TOP_ADDR, 0x26, 0x0f07, },
69         { S5H1411_I2C_TOP_ADDR, 0x27, 0x0f04, },
70         { S5H1411_I2C_TOP_ADDR, 0x28, 0x070f, },
71         { S5H1411_I2C_TOP_ADDR, 0x29, 0x2820, },
72         { S5H1411_I2C_TOP_ADDR, 0x2a, 0x102e, },
73         { S5H1411_I2C_TOP_ADDR, 0x2b, 0x0220, },
74         { S5H1411_I2C_TOP_ADDR, 0x2e, 0x0d0e, },
75         { S5H1411_I2C_TOP_ADDR, 0x2f, 0x1013, },
76         { S5H1411_I2C_TOP_ADDR, 0x31, 0x171b, },
77         { S5H1411_I2C_TOP_ADDR, 0x32, 0x0e0f, },
78         { S5H1411_I2C_TOP_ADDR, 0x33, 0x0f10, },
79         { S5H1411_I2C_TOP_ADDR, 0x34, 0x170e, },
80         { S5H1411_I2C_TOP_ADDR, 0x35, 0x4b10, },
81         { S5H1411_I2C_TOP_ADDR, 0x36, 0x0f17, },
82         { S5H1411_I2C_TOP_ADDR, 0x3c, 0x1577, },
83         { S5H1411_I2C_TOP_ADDR, 0x3d, 0x081a, },
84         { S5H1411_I2C_TOP_ADDR, 0x3e, 0x77ee, },
85         { S5H1411_I2C_TOP_ADDR, 0x40, 0x1e09, },
86         { S5H1411_I2C_TOP_ADDR, 0x41, 0x0f0c, },
87         { S5H1411_I2C_TOP_ADDR, 0x42, 0x1f10, },
88         { S5H1411_I2C_TOP_ADDR, 0x4d, 0x0509, },
89         { S5H1411_I2C_TOP_ADDR, 0x4e, 0x0a00, },
90         { S5H1411_I2C_TOP_ADDR, 0x50, 0x0000, },
91         { S5H1411_I2C_TOP_ADDR, 0x5b, 0x0000, },
92         { S5H1411_I2C_TOP_ADDR, 0x5c, 0x0008, },
93         { S5H1411_I2C_TOP_ADDR, 0x57, 0x1101, },
94         { S5H1411_I2C_TOP_ADDR, 0x65, 0x007c, },
95         { S5H1411_I2C_TOP_ADDR, 0x68, 0x0512, },
96         { S5H1411_I2C_TOP_ADDR, 0x69, 0x0258, },
97         { S5H1411_I2C_TOP_ADDR, 0x70, 0x0004, },
98         { S5H1411_I2C_TOP_ADDR, 0x71, 0x0007, },
99         { S5H1411_I2C_TOP_ADDR, 0x76, 0x00a9, },
100         { S5H1411_I2C_TOP_ADDR, 0x78, 0x3141, },
101         { S5H1411_I2C_TOP_ADDR, 0x7a, 0x3141, },
102         { S5H1411_I2C_TOP_ADDR, 0xb3, 0x8003, },
103         { S5H1411_I2C_TOP_ADDR, 0xb5, 0xafbb, },
104         { S5H1411_I2C_TOP_ADDR, 0xb5, 0xa6bb, },
105         { S5H1411_I2C_TOP_ADDR, 0xb6, 0x0609, },
106         { S5H1411_I2C_TOP_ADDR, 0xb7, 0x2f06, },
107         { S5H1411_I2C_TOP_ADDR, 0xb8, 0x003f, },
108         { S5H1411_I2C_TOP_ADDR, 0xb9, 0x2700, },
109         { S5H1411_I2C_TOP_ADDR, 0xba, 0xfac8, },
110         { S5H1411_I2C_TOP_ADDR, 0xbe, 0x1003, },
111         { S5H1411_I2C_TOP_ADDR, 0xbf, 0x103f, },
112         { S5H1411_I2C_TOP_ADDR, 0xce, 0x2000, },
113         { S5H1411_I2C_TOP_ADDR, 0xcf, 0x0800, },
114         { S5H1411_I2C_TOP_ADDR, 0xd0, 0x0800, },
115         { S5H1411_I2C_TOP_ADDR, 0xd1, 0x0400, },
116         { S5H1411_I2C_TOP_ADDR, 0xd2, 0x0800, },
117         { S5H1411_I2C_TOP_ADDR, 0xd3, 0x2000, },
118         { S5H1411_I2C_TOP_ADDR, 0xd4, 0x3000, },
119         { S5H1411_I2C_TOP_ADDR, 0xdb, 0x4a9b, },
120         { S5H1411_I2C_TOP_ADDR, 0xdc, 0x1000, },
121         { S5H1411_I2C_TOP_ADDR, 0xde, 0x0001, },
122         { S5H1411_I2C_TOP_ADDR, 0xdf, 0x0000, },
123         { S5H1411_I2C_TOP_ADDR, 0xe3, 0x0301, },
124         { S5H1411_I2C_QAM_ADDR, 0xf3, 0x0000, },
125         { S5H1411_I2C_QAM_ADDR, 0xf3, 0x0001, },
126         { S5H1411_I2C_QAM_ADDR, 0x08, 0x0600, },
127         { S5H1411_I2C_QAM_ADDR, 0x18, 0x4201, },
128         { S5H1411_I2C_QAM_ADDR, 0x1e, 0x6476, },
129         { S5H1411_I2C_QAM_ADDR, 0x21, 0x0830, },
130         { S5H1411_I2C_QAM_ADDR, 0x0c, 0x5679, },
131         { S5H1411_I2C_QAM_ADDR, 0x0d, 0x579b, },
132         { S5H1411_I2C_QAM_ADDR, 0x24, 0x0102, },
133         { S5H1411_I2C_QAM_ADDR, 0x31, 0x7488, },
134         { S5H1411_I2C_QAM_ADDR, 0x32, 0x0a08, },
135         { S5H1411_I2C_QAM_ADDR, 0x3d, 0x8689, },
136         { S5H1411_I2C_QAM_ADDR, 0x49, 0x0048, },
137         { S5H1411_I2C_QAM_ADDR, 0x57, 0x2012, },
138         { S5H1411_I2C_QAM_ADDR, 0x5d, 0x7676, },
139         { S5H1411_I2C_QAM_ADDR, 0x04, 0x0400, },
140         { S5H1411_I2C_QAM_ADDR, 0x58, 0x00c0, },
141         { S5H1411_I2C_QAM_ADDR, 0x5b, 0x0100, },
142 };
143
144 /* VSB SNR lookup table */
145 static struct vsb_snr_tab {
146         u16     val;
147         u16     data;
148 } vsb_snr_tab[] = {
149         {  0x39f, 300, },
150         {  0x39b, 295, },
151         {  0x397, 290, },
152         {  0x394, 285, },
153         {  0x38f, 280, },
154         {  0x38b, 275, },
155         {  0x387, 270, },
156         {  0x382, 265, },
157         {  0x37d, 260, },
158         {  0x377, 255, },
159         {  0x370, 250, },
160         {  0x36a, 245, },
161         {  0x364, 240, },
162         {  0x35b, 235, },
163         {  0x353, 230, },
164         {  0x349, 225, },
165         {  0x340, 320, },
166         {  0x337, 215, },
167         {  0x327, 210, },
168         {  0x31b, 205, },
169         {  0x310, 200, },
170         {  0x302, 195, },
171         {  0x2f3, 190, },
172         {  0x2e4, 185, },
173         {  0x2d7, 180, },
174         {  0x2cd, 175, },
175         {  0x2bb, 170, },
176         {  0x2a9, 165, },
177         {  0x29e, 160, },
178         {  0x284, 155, },
179         {  0x27a, 150, },
180         {  0x260, 145, },
181         {  0x23a, 140, },
182         {  0x224, 135, },
183         {  0x213, 130, },
184         {  0x204, 125, },
185         {  0x1fe, 120, },
186         {      0,   0, },
187 };
188
189 /* QAM64 SNR lookup table */
190 static struct qam64_snr_tab {
191         u16     val;
192         u16     data;
193 } qam64_snr_tab[] = {
194         {  0x0001,   0, },
195         {  0x0af0, 300, },
196         {  0x0d80, 290, },
197         {  0x10a0, 280, },
198         {  0x14b5, 270, },
199         {  0x1590, 268, },
200         {  0x1680, 266, },
201         {  0x17b0, 264, },
202         {  0x18c0, 262, },
203         {  0x19b0, 260, },
204         {  0x1ad0, 258, },
205         {  0x1d00, 256, },
206         {  0x1da0, 254, },
207         {  0x1ef0, 252, },
208         {  0x2050, 250, },
209         {  0x20f0, 249, },
210         {  0x21d0, 248, },
211         {  0x22b0, 247, },
212         {  0x23a0, 246, },
213         {  0x2470, 245, },
214         {  0x24f0, 244, },
215         {  0x25a0, 243, },
216         {  0x26c0, 242, },
217         {  0x27b0, 241, },
218         {  0x28d0, 240, },
219         {  0x29b0, 239, },
220         {  0x2ad0, 238, },
221         {  0x2ba0, 237, },
222         {  0x2c80, 236, },
223         {  0x2d20, 235, },
224         {  0x2e00, 234, },
225         {  0x2f10, 233, },
226         {  0x3050, 232, },
227         {  0x3190, 231, },
228         {  0x3300, 230, },
229         {  0x3340, 229, },
230         {  0x3200, 228, },
231         {  0x3550, 227, },
232         {  0x3610, 226, },
233         {  0x3600, 225, },
234         {  0x3700, 224, },
235         {  0x3800, 223, },
236         {  0x3920, 222, },
237         {  0x3a20, 221, },
238         {  0x3b30, 220, },
239         {  0x3d00, 219, },
240         {  0x3e00, 218, },
241         {  0x4000, 217, },
242         {  0x4100, 216, },
243         {  0x4300, 215, },
244         {  0x4400, 214, },
245         {  0x4600, 213, },
246         {  0x4700, 212, },
247         {  0x4800, 211, },
248         {  0x4a00, 210, },
249         {  0x4b00, 209, },
250         {  0x4d00, 208, },
251         {  0x4f00, 207, },
252         {  0x5050, 206, },
253         {  0x5200, 205, },
254         {  0x53c0, 204, },
255         {  0x5450, 203, },
256         {  0x5650, 202, },
257         {  0x5820, 201, },
258         {  0x6000, 200, },
259         {  0xffff,   0, },
260 };
261
262 /* QAM256 SNR lookup table */
263 static struct qam256_snr_tab {
264         u16     val;
265         u16     data;
266 } qam256_snr_tab[] = {
267         {  0x0001,   0, },
268         {  0x0970, 400, },
269         {  0x0a90, 390, },
270         {  0x0b90, 380, },
271         {  0x0d90, 370, },
272         {  0x0ff0, 360, },
273         {  0x1240, 350, },
274         {  0x1345, 348, },
275         {  0x13c0, 346, },
276         {  0x14c0, 344, },
277         {  0x1500, 342, },
278         {  0x1610, 340, },
279         {  0x1700, 338, },
280         {  0x1800, 336, },
281         {  0x18b0, 334, },
282         {  0x1900, 332, },
283         {  0x1ab0, 330, },
284         {  0x1bc0, 328, },
285         {  0x1cb0, 326, },
286         {  0x1db0, 324, },
287         {  0x1eb0, 322, },
288         {  0x2030, 320, },
289         {  0x2200, 318, },
290         {  0x2280, 316, },
291         {  0x2410, 314, },
292         {  0x25b0, 312, },
293         {  0x27a0, 310, },
294         {  0x2840, 308, },
295         {  0x29d0, 306, },
296         {  0x2b10, 304, },
297         {  0x2d30, 302, },
298         {  0x2f20, 300, },
299         {  0x30c0, 298, },
300         {  0x3260, 297, },
301         {  0x32c0, 296, },
302         {  0x3300, 295, },
303         {  0x33b0, 294, },
304         {  0x34b0, 293, },
305         {  0x35a0, 292, },
306         {  0x3650, 291, },
307         {  0x3800, 290, },
308         {  0x3900, 289, },
309         {  0x3a50, 288, },
310         {  0x3b30, 287, },
311         {  0x3cb0, 286, },
312         {  0x3e20, 285, },
313         {  0x3fa0, 284, },
314         {  0x40a0, 283, },
315         {  0x41c0, 282, },
316         {  0x42f0, 281, },
317         {  0x44a0, 280, },
318         {  0x4600, 279, },
319         {  0x47b0, 278, },
320         {  0x4900, 277, },
321         {  0x4a00, 276, },
322         {  0x4ba0, 275, },
323         {  0x4d00, 274, },
324         {  0x4f00, 273, },
325         {  0x5000, 272, },
326         {  0x51f0, 272, },
327         {  0x53a0, 270, },
328         {  0x5520, 269, },
329         {  0x5700, 268, },
330         {  0x5800, 267, },
331         {  0x5a00, 266, },
332         {  0x5c00, 265, },
333         {  0x5d00, 264, },
334         {  0x5f00, 263, },
335         {  0x6000, 262, },
336         {  0x6200, 261, },
337         {  0x6400, 260, },
338         {  0xffff,   0, },
339 };
340
341 /* 8 bit registers, 16 bit values */
342 static int s5h1411_writereg(struct s5h1411_state *state,
343         u8 addr, u8 reg, u16 data)
344 {
345         int ret;
346         u8 buf [] = { reg, data >> 8,  data & 0xff };
347
348         struct i2c_msg msg = { .addr = addr, .flags = 0, .buf = buf, .len = 3 };
349
350         ret = i2c_transfer(state->i2c, &msg, 1);
351
352         if (ret != 1)
353                 printk(KERN_ERR "%s: writereg error 0x%02x 0x%02x 0x%04x, "
354                        "ret == %i)\n", __func__, addr, reg, data, ret);
355
356         return (ret != 1) ? -1 : 0;
357 }
358
359 static u16 s5h1411_readreg(struct s5h1411_state *state, u8 addr, u8 reg)
360 {
361         int ret;
362         u8 b0 [] = { reg };
363         u8 b1 [] = { 0, 0 };
364
365         struct i2c_msg msg [] = {
366                 { .addr = addr, .flags = 0, .buf = b0, .len = 1 },
367                 { .addr = addr, .flags = I2C_M_RD, .buf = b1, .len = 2 } };
368
369         ret = i2c_transfer(state->i2c, msg, 2);
370
371         if (ret != 2)
372                 printk(KERN_ERR "%s: readreg error (ret == %i)\n",
373                         __func__, ret);
374         return (b1[0] << 8) | b1[1];
375 }
376
377 static int s5h1411_softreset(struct dvb_frontend *fe)
378 {
379         struct s5h1411_state *state = fe->demodulator_priv;
380
381         dprintk("%s()\n", __func__);
382
383         s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf7, 0);
384         s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf7, 1);
385         return 0;
386 }
387
388 static int s5h1411_set_if_freq(struct dvb_frontend *fe, int KHz)
389 {
390         struct s5h1411_state *state = fe->demodulator_priv;
391
392         dprintk("%s(%d KHz)\n", __func__, KHz);
393
394         switch (KHz) {
395         case 3250:
396                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x38, 0x10d9);
397                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x39, 0x5342);
398                 s5h1411_writereg(state, S5H1411_I2C_QAM_ADDR, 0x2c, 0x10d9);
399                 break;
400         case 3500:
401                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x38, 0x1225);
402                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x39, 0x1e96);
403                 s5h1411_writereg(state, S5H1411_I2C_QAM_ADDR, 0x2c, 0x1225);
404                 break;
405         case 4000:
406                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x38, 0x14bc);
407                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x39, 0xb53e);
408                 s5h1411_writereg(state, S5H1411_I2C_QAM_ADDR, 0x2c, 0x14bd);
409                 break;
410         default:
411                 dprintk("%s(%d KHz) Invalid, defaulting to 5380\n",
412                         __func__, KHz);
413                 /* no break, need to continue */
414         case 5380:
415         case 44000:
416                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x38, 0x1be4);
417                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x39, 0x3655);
418                 s5h1411_writereg(state, S5H1411_I2C_QAM_ADDR, 0x2c, 0x1be4);
419                 break;
420         }
421
422         state->if_freq = KHz;
423
424         return 0;
425 }
426
427 static int s5h1411_set_mpeg_timing(struct dvb_frontend *fe, int mode)
428 {
429         struct s5h1411_state *state = fe->demodulator_priv;
430         u16 val;
431
432         dprintk("%s(%d)\n", __func__, mode);
433
434         val = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xbe) & 0xcfff;
435         switch (mode) {
436         case S5H1411_MPEGTIMING_CONTINOUS_INVERTING_CLOCK:
437                 val |= 0x0000;
438                 break;
439         case S5H1411_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK:
440                 dprintk("%s(%d) Mode1 or Defaulting\n", __func__, mode);
441                 val |= 0x1000;
442                 break;
443         case S5H1411_MPEGTIMING_NONCONTINOUS_INVERTING_CLOCK:
444                 val |= 0x2000;
445                 break;
446         case S5H1411_MPEGTIMING_NONCONTINOUS_NONINVERTING_CLOCK:
447                 val |= 0x3000;
448                 break;
449         default:
450                 return -EINVAL;
451         }
452
453         /* Configure MPEG Signal Timing charactistics */
454         return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xbe, val);
455 }
456
457 static int s5h1411_set_spectralinversion(struct dvb_frontend *fe, int inversion)
458 {
459         struct s5h1411_state *state = fe->demodulator_priv;
460         u16 val;
461
462         dprintk("%s(%d)\n", __func__, inversion);
463         val = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0x24) & ~0x1000;
464
465         if (inversion == 1)
466                 val |= 0x1000; /* Inverted */
467         else
468                 val |= 0x0000;
469
470         state->inversion = inversion;
471         return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x24, val);
472 }
473
474 static int s5h1411_enable_modulation(struct dvb_frontend *fe,
475                                      fe_modulation_t m)
476 {
477         struct s5h1411_state *state = fe->demodulator_priv;
478
479         dprintk("%s(0x%08x)\n", __func__, m);
480
481         switch (m) {
482         case VSB_8:
483                 dprintk("%s() VSB_8\n", __func__);
484                 s5h1411_set_if_freq(fe, state->config->vsb_if);
485                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x00, 0x71);
486                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf6, 0x00);
487                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xcd, 0xf1);
488                 break;
489         case QAM_64:
490         case QAM_256:
491         case QAM_AUTO:
492                 dprintk("%s() QAM_AUTO (64/256)\n", __func__);
493                 s5h1411_set_if_freq(fe, state->config->qam_if);
494                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x00, 0x0171);
495                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf6, 0x0001);
496                 s5h1411_writereg(state, S5H1411_I2C_QAM_ADDR, 0x16, 0x1101);
497                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xcd, 0x00f0);
498                 break;
499         default:
500                 dprintk("%s() Invalid modulation\n", __func__);
501                 return -EINVAL;
502         }
503
504         state->current_modulation = m;
505         s5h1411_softreset(fe);
506
507         return 0;
508 }
509
510 static int s5h1411_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
511 {
512         struct s5h1411_state *state = fe->demodulator_priv;
513
514         dprintk("%s(%d)\n", __func__, enable);
515
516         if (enable)
517                 return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf5, 1);
518         else
519                 return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf5, 0);
520 }
521
522 static int s5h1411_set_gpio(struct dvb_frontend *fe, int enable)
523 {
524         struct s5h1411_state *state = fe->demodulator_priv;
525         u16 val;
526
527         dprintk("%s(%d)\n", __func__, enable);
528
529         val = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xe0) & ~0x02;
530
531         if (enable)
532                 return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xe0,
533                                 val | 0x02);
534         else
535                 return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xe0, val);
536 }
537
538 static int s5h1411_sleep(struct dvb_frontend *fe, int enable)
539 {
540         struct s5h1411_state *state = fe->demodulator_priv;
541
542         dprintk("%s(%d)\n", __func__, enable);
543
544         if (enable)
545                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf4, 1);
546         else {
547                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf4, 0);
548                 s5h1411_softreset(fe);
549         }
550
551         return 0;
552 }
553
554 static int s5h1411_register_reset(struct dvb_frontend *fe)
555 {
556         struct s5h1411_state *state = fe->demodulator_priv;
557
558         dprintk("%s()\n", __func__);
559
560         return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf3, 0);
561 }
562
563 /* Talk to the demod, set the FEC, GUARD, QAM settings etc */
564 static int s5h1411_set_frontend(struct dvb_frontend *fe,
565         struct dvb_frontend_parameters *p)
566 {
567         struct s5h1411_state *state = fe->demodulator_priv;
568
569         dprintk("%s(frequency=%d)\n", __func__, p->frequency);
570
571         s5h1411_softreset(fe);
572
573         state->current_frequency = p->frequency;
574
575         s5h1411_enable_modulation(fe, p->u.vsb.modulation);
576
577         /* Allow the demod to settle */
578         msleep(100);
579
580         if (fe->ops.tuner_ops.set_params) {
581                 if (fe->ops.i2c_gate_ctrl)
582                         fe->ops.i2c_gate_ctrl(fe, 1);
583
584                 fe->ops.tuner_ops.set_params(fe, p);
585
586                 if (fe->ops.i2c_gate_ctrl)
587                         fe->ops.i2c_gate_ctrl(fe, 0);
588         }
589
590         return 0;
591 }
592
593 /* Reset the demod hardware and reset all of the configuration registers
594    to a default state. */
595 static int s5h1411_init(struct dvb_frontend *fe)
596 {
597         struct s5h1411_state *state = fe->demodulator_priv;
598         int i;
599
600         dprintk("%s()\n", __func__);
601
602         s5h1411_sleep(fe, 0);
603         s5h1411_register_reset(fe);
604
605         for (i = 0; i < ARRAY_SIZE(init_tab); i++)
606                 s5h1411_writereg(state, init_tab[i].addr,
607                         init_tab[i].reg,
608                         init_tab[i].data);
609
610         /* The datasheet says that after initialisation, VSB is default */
611         state->current_modulation = VSB_8;
612
613         if (state->config->output_mode == S5H1411_SERIAL_OUTPUT)
614                 /* Serial */
615                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xbd, 0x1101);
616         else
617                 /* Parallel */
618                 s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xbd, 0x1001);
619
620         s5h1411_set_spectralinversion(fe, state->config->inversion);
621         s5h1411_set_if_freq(fe, state->config->vsb_if);
622         s5h1411_set_gpio(fe, state->config->gpio);
623         s5h1411_set_mpeg_timing(fe, state->config->mpeg_timing);
624         s5h1411_softreset(fe);
625
626         /* Note: Leaving the I2C gate closed. */
627         s5h1411_i2c_gate_ctrl(fe, 0);
628
629         return 0;
630 }
631
632 static int s5h1411_read_status(struct dvb_frontend *fe, fe_status_t *status)
633 {
634         struct s5h1411_state *state = fe->demodulator_priv;
635         u16 reg;
636         u32 tuner_status = 0;
637
638         *status = 0;
639
640         /* Get the demodulator status */
641         reg = (s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xf2) >> 15)
642                 & 0x0001;
643         if (reg)
644                 *status |= FE_HAS_LOCK | FE_HAS_CARRIER | FE_HAS_SIGNAL;
645
646         switch (state->current_modulation) {
647         case QAM_64:
648         case QAM_256:
649                 reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xf0);
650                 if (reg & 0x100)
651                         *status |= FE_HAS_VITERBI;
652                 if (reg & 0x10)
653                         *status |= FE_HAS_SYNC;
654                 break;
655         case VSB_8:
656                 reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0x5e);
657                 if (reg & 0x0001)
658                         *status |= FE_HAS_SYNC;
659                 reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xf2);
660                 if (reg & 0x1000)
661                         *status |= FE_HAS_VITERBI;
662                 break;
663         default:
664                 return -EINVAL;
665         }
666
667         switch (state->config->status_mode) {
668         case S5H1411_DEMODLOCKING:
669                 if (*status & FE_HAS_VITERBI)
670                         *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
671                 break;
672         case S5H1411_TUNERLOCKING:
673                 /* Get the tuner status */
674                 if (fe->ops.tuner_ops.get_status) {
675                         if (fe->ops.i2c_gate_ctrl)
676                                 fe->ops.i2c_gate_ctrl(fe, 1);
677
678                         fe->ops.tuner_ops.get_status(fe, &tuner_status);
679
680                         if (fe->ops.i2c_gate_ctrl)
681                                 fe->ops.i2c_gate_ctrl(fe, 0);
682                 }
683                 if (tuner_status)
684                         *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
685                 break;
686         }
687
688         dprintk("%s() status 0x%08x\n", __func__, *status);
689
690         return 0;
691 }
692
693 static int s5h1411_qam256_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v)
694 {
695         int i, ret = -EINVAL;
696         dprintk("%s()\n", __func__);
697
698         for (i = 0; i < ARRAY_SIZE(qam256_snr_tab); i++) {
699                 if (v < qam256_snr_tab[i].val) {
700                         *snr = qam256_snr_tab[i].data;
701                         ret = 0;
702                         break;
703                 }
704         }
705         return ret;
706 }
707
708 static int s5h1411_qam64_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v)
709 {
710         int i, ret = -EINVAL;
711         dprintk("%s()\n", __func__);
712
713         for (i = 0; i < ARRAY_SIZE(qam64_snr_tab); i++) {
714                 if (v < qam64_snr_tab[i].val) {
715                         *snr = qam64_snr_tab[i].data;
716                         ret = 0;
717                         break;
718                 }
719         }
720         return ret;
721 }
722
723 static int s5h1411_vsb_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v)
724 {
725         int i, ret = -EINVAL;
726         dprintk("%s()\n", __func__);
727
728         for (i = 0; i < ARRAY_SIZE(vsb_snr_tab); i++) {
729                 if (v > vsb_snr_tab[i].val) {
730                         *snr = vsb_snr_tab[i].data;
731                         ret = 0;
732                         break;
733                 }
734         }
735         dprintk("%s() snr=%d\n", __func__, *snr);
736         return ret;
737 }
738
739 static int s5h1411_read_snr(struct dvb_frontend *fe, u16 *snr)
740 {
741         struct s5h1411_state *state = fe->demodulator_priv;
742         u16 reg;
743         dprintk("%s()\n", __func__);
744
745         switch (state->current_modulation) {
746         case QAM_64:
747                 reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xf1);
748                 return s5h1411_qam64_lookup_snr(fe, snr, reg);
749         case QAM_256:
750                 reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xf1);
751                 return s5h1411_qam256_lookup_snr(fe, snr, reg);
752         case VSB_8:
753                 reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR,
754                         0xf2) & 0x3ff;
755                 return s5h1411_vsb_lookup_snr(fe, snr, reg);
756         default:
757                 break;
758         }
759
760         return -EINVAL;
761 }
762
763 static int s5h1411_read_signal_strength(struct dvb_frontend *fe,
764         u16 *signal_strength)
765 {
766         return s5h1411_read_snr(fe, signal_strength);
767 }
768
769 static int s5h1411_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
770 {
771         struct s5h1411_state *state = fe->demodulator_priv;
772
773         *ucblocks = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xc9);
774
775         return 0;
776 }
777
778 static int s5h1411_read_ber(struct dvb_frontend *fe, u32 *ber)
779 {
780         return s5h1411_read_ucblocks(fe, ber);
781 }
782
783 static int s5h1411_get_frontend(struct dvb_frontend *fe,
784                                 struct dvb_frontend_parameters *p)
785 {
786         struct s5h1411_state *state = fe->demodulator_priv;
787
788         p->frequency = state->current_frequency;
789         p->u.vsb.modulation = state->current_modulation;
790
791         return 0;
792 }
793
794 static int s5h1411_get_tune_settings(struct dvb_frontend *fe,
795                                      struct dvb_frontend_tune_settings *tune)
796 {
797         tune->min_delay_ms = 1000;
798         return 0;
799 }
800
801 static void s5h1411_release(struct dvb_frontend *fe)
802 {
803         struct s5h1411_state *state = fe->demodulator_priv;
804         kfree(state);
805 }
806
807 static struct dvb_frontend_ops s5h1411_ops;
808
809 struct dvb_frontend *s5h1411_attach(const struct s5h1411_config *config,
810                                     struct i2c_adapter *i2c)
811 {
812         struct s5h1411_state *state = NULL;
813         u16 reg;
814
815         /* allocate memory for the internal state */
816         state = kmalloc(sizeof(struct s5h1411_state), GFP_KERNEL);
817         if (state == NULL)
818                 goto error;
819
820         /* setup the state */
821         state->config = config;
822         state->i2c = i2c;
823         state->current_modulation = VSB_8;
824         state->inversion = state->config->inversion;
825
826         /* check if the demod exists */
827         reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0x05);
828         if (reg != 0x0066)
829                 goto error;
830
831         /* create dvb_frontend */
832         memcpy(&state->frontend.ops, &s5h1411_ops,
833                sizeof(struct dvb_frontend_ops));
834
835         state->frontend.demodulator_priv = state;
836
837         if (s5h1411_init(&state->frontend) != 0) {
838                 printk(KERN_ERR "%s: Failed to initialize correctly\n",
839                         __func__);
840                 goto error;
841         }
842
843         /* Note: Leaving the I2C gate open here. */
844         s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf5, 1);
845
846         return &state->frontend;
847
848 error:
849         kfree(state);
850         return NULL;
851 }
852 EXPORT_SYMBOL(s5h1411_attach);
853
854 static struct dvb_frontend_ops s5h1411_ops = {
855
856         .info = {
857                 .name                   = "Samsung S5H1411 QAM/8VSB Frontend",
858                 .type                   = FE_ATSC,
859                 .frequency_min          = 54000000,
860                 .frequency_max          = 858000000,
861                 .frequency_stepsize     = 62500,
862                 .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
863         },
864
865         .init                 = s5h1411_init,
866         .i2c_gate_ctrl        = s5h1411_i2c_gate_ctrl,
867         .set_frontend         = s5h1411_set_frontend,
868         .get_frontend         = s5h1411_get_frontend,
869         .get_tune_settings    = s5h1411_get_tune_settings,
870         .read_status          = s5h1411_read_status,
871         .read_ber             = s5h1411_read_ber,
872         .read_signal_strength = s5h1411_read_signal_strength,
873         .read_snr             = s5h1411_read_snr,
874         .read_ucblocks        = s5h1411_read_ucblocks,
875         .release              = s5h1411_release,
876 };
877
878 module_param(debug, int, 0644);
879 MODULE_PARM_DESC(debug, "Enable verbose debug messages");
880
881 MODULE_DESCRIPTION("Samsung S5H1411 QAM-B/ATSC Demodulator driver");
882 MODULE_AUTHOR("Steven Toth");
883 MODULE_LICENSE("GPL");
884
885 /*
886  * Local variables:
887  * c-basic-offset: 8
888  */