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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
4c48ae8e | 2 | /* |
14811ac9 | 3 | * Driver for Conexant CX24113/CX24128 Tuner (Satellite) |
4c48ae8e PB |
4 | * |
5 | * Copyright (C) 2007-8 Patrick Boettcher <pb@linuxtv.org> | |
6 | * | |
7 | * Developed for BBTI / Technisat | |
4c48ae8e PB |
8 | */ |
9 | ||
10 | #include <linux/slab.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/init.h> | |
14 | ||
fada1935 | 15 | #include <media/dvb_frontend.h> |
4c48ae8e PB |
16 | #include "cx24113.h" |
17 | ||
18 | static int debug; | |
19 | ||
d2940930 HPS |
20 | #define cx_info(args...) do { printk(KERN_INFO "CX24113: " args); } while (0) |
21 | #define cx_err(args...) do { printk(KERN_ERR "CX24113: " args); } while (0) | |
4c48ae8e PB |
22 | |
23 | #define dprintk(args...) \ | |
24 | do { \ | |
25 | if (debug) { \ | |
26 | printk(KERN_DEBUG "CX24113: %s: ", __func__); \ | |
27 | printk(args); \ | |
28 | } \ | |
29 | } while (0) | |
30 | ||
31 | struct cx24113_state { | |
32 | struct i2c_adapter *i2c; | |
33 | const struct cx24113_config *config; | |
34 | ||
35 | #define REV_CX24113 0x23 | |
36 | u8 rev; | |
37 | u8 ver; | |
38 | ||
826c8b60 | 39 | u8 icp_mode:1; |
4c48ae8e PB |
40 | |
41 | #define ICP_LEVEL1 0 | |
42 | #define ICP_LEVEL2 1 | |
43 | #define ICP_LEVEL3 2 | |
44 | #define ICP_LEVEL4 3 | |
826c8b60 PB |
45 | u8 icp_man:2; |
46 | u8 icp_auto_low:2; | |
47 | u8 icp_auto_mlow:2; | |
48 | u8 icp_auto_mhi:2; | |
49 | u8 icp_auto_hi:2; | |
50 | u8 icp_dig; | |
4c48ae8e PB |
51 | |
52 | #define LNA_MIN_GAIN 0 | |
53 | #define LNA_MID_GAIN 1 | |
54 | #define LNA_MAX_GAIN 2 | |
826c8b60 | 55 | u8 lna_gain:2; |
4c48ae8e | 56 | |
826c8b60 | 57 | u8 acp_on:1; |
4c48ae8e | 58 | |
826c8b60 PB |
59 | u8 vco_mode:2; |
60 | u8 vco_shift:1; | |
4c48ae8e PB |
61 | #define VCOBANDSEL_6 0x80 |
62 | #define VCOBANDSEL_5 0x01 | |
63 | #define VCOBANDSEL_4 0x02 | |
64 | #define VCOBANDSEL_3 0x04 | |
65 | #define VCOBANDSEL_2 0x08 | |
66 | #define VCOBANDSEL_1 0x10 | |
826c8b60 | 67 | u8 vco_band; |
4c48ae8e PB |
68 | |
69 | #define VCODIV4 4 | |
70 | #define VCODIV2 2 | |
71 | u8 vcodiv; | |
72 | ||
826c8b60 PB |
73 | u8 bs_delay:4; |
74 | u16 bs_freqcnt:13; | |
75 | u16 bs_rdiv; | |
76 | u8 prescaler_mode:1; | |
4c48ae8e | 77 | |
826c8b60 | 78 | u8 rfvga_bias_ctrl; |
4c48ae8e PB |
79 | |
80 | s16 tuner_gain_thres; | |
81 | u8 gain_level; | |
82 | ||
83 | u32 frequency; | |
84 | ||
85 | u8 refdiv; | |
86 | ||
87 | u8 Fwindow_enabled; | |
88 | }; | |
89 | ||
90 | static int cx24113_writereg(struct cx24113_state *state, int reg, int data) | |
91 | { | |
92 | u8 buf[] = { reg, data }; | |
93 | struct i2c_msg msg = { .addr = state->config->i2c_addr, | |
94 | .flags = 0, .buf = buf, .len = 2 }; | |
95 | int err = i2c_transfer(state->i2c, &msg, 1); | |
96 | if (err != 1) { | |
4bd69e7b MCC |
97 | printk(KERN_DEBUG "%s: writereg error(err == %i, reg == 0x%02x, data == 0x%02x)\n", |
98 | __func__, err, reg, data); | |
4c48ae8e PB |
99 | return err; |
100 | } | |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
105 | static int cx24113_readreg(struct cx24113_state *state, u8 reg) | |
106 | { | |
107 | int ret; | |
108 | u8 b; | |
109 | struct i2c_msg msg[] = { | |
110 | { .addr = state->config->i2c_addr, | |
111 | .flags = 0, .buf = ®, .len = 1 }, | |
112 | { .addr = state->config->i2c_addr, | |
113 | .flags = I2C_M_RD, .buf = &b, .len = 1 } | |
114 | }; | |
115 | ||
116 | ret = i2c_transfer(state->i2c, msg, 2); | |
117 | ||
118 | if (ret != 2) { | |
119 | printk(KERN_DEBUG "%s: reg=0x%x (error=%d)\n", | |
120 | __func__, reg, ret); | |
121 | return ret; | |
122 | } | |
123 | ||
124 | return b; | |
125 | } | |
126 | ||
127 | static void cx24113_set_parameters(struct cx24113_state *state) | |
128 | { | |
129 | u8 r; | |
130 | ||
131 | r = cx24113_readreg(state, 0x10) & 0x82; | |
132 | r |= state->icp_mode; | |
133 | r |= state->icp_man << 4; | |
134 | r |= state->icp_dig << 2; | |
135 | r |= state->prescaler_mode << 5; | |
136 | cx24113_writereg(state, 0x10, r); | |
137 | ||
138 | r = (state->icp_auto_low << 0) | (state->icp_auto_mlow << 2) | |
139 | | (state->icp_auto_mhi << 4) | (state->icp_auto_hi << 6); | |
140 | cx24113_writereg(state, 0x11, r); | |
141 | ||
142 | if (state->rev == REV_CX24113) { | |
143 | r = cx24113_readreg(state, 0x20) & 0xec; | |
144 | r |= state->lna_gain; | |
145 | r |= state->rfvga_bias_ctrl << 4; | |
146 | cx24113_writereg(state, 0x20, r); | |
147 | } | |
148 | ||
149 | r = cx24113_readreg(state, 0x12) & 0x03; | |
150 | r |= state->acp_on << 2; | |
151 | r |= state->bs_delay << 4; | |
152 | cx24113_writereg(state, 0x12, r); | |
153 | ||
154 | r = cx24113_readreg(state, 0x18) & 0x40; | |
155 | r |= state->vco_shift; | |
156 | if (state->vco_band == VCOBANDSEL_6) | |
157 | r |= (1 << 7); | |
158 | else | |
159 | r |= (state->vco_band << 1); | |
160 | cx24113_writereg(state, 0x18, r); | |
161 | ||
162 | r = cx24113_readreg(state, 0x14) & 0x20; | |
163 | r |= (state->vco_mode << 6) | ((state->bs_freqcnt >> 8) & 0x1f); | |
164 | cx24113_writereg(state, 0x14, r); | |
165 | cx24113_writereg(state, 0x15, (state->bs_freqcnt & 0xff)); | |
166 | ||
167 | cx24113_writereg(state, 0x16, (state->bs_rdiv >> 4) & 0xff); | |
168 | r = (cx24113_readreg(state, 0x17) & 0x0f) | | |
169 | ((state->bs_rdiv & 0x0f) << 4); | |
170 | cx24113_writereg(state, 0x17, r); | |
171 | } | |
172 | ||
173 | #define VGA_0 0x00 | |
174 | #define VGA_1 0x04 | |
175 | #define VGA_2 0x02 | |
176 | #define VGA_3 0x06 | |
177 | #define VGA_4 0x01 | |
178 | #define VGA_5 0x05 | |
179 | #define VGA_6 0x03 | |
180 | #define VGA_7 0x07 | |
181 | ||
182 | #define RFVGA_0 0x00 | |
183 | #define RFVGA_1 0x01 | |
184 | #define RFVGA_2 0x02 | |
185 | #define RFVGA_3 0x03 | |
186 | ||
187 | static int cx24113_set_gain_settings(struct cx24113_state *state, | |
188 | s16 power_estimation) | |
189 | { | |
190 | u8 ampout = cx24113_readreg(state, 0x1d) & 0xf0, | |
191 | vga = cx24113_readreg(state, 0x1f) & 0x3f, | |
192 | rfvga = cx24113_readreg(state, 0x20) & 0xf3; | |
193 | u8 gain_level = power_estimation >= state->tuner_gain_thres; | |
194 | ||
195 | dprintk("power estimation: %d, thres: %d, gain_level: %d/%d\n", | |
196 | power_estimation, state->tuner_gain_thres, | |
197 | state->gain_level, gain_level); | |
198 | ||
199 | if (gain_level == state->gain_level) | |
200 | return 0; /* nothing to be done */ | |
201 | ||
202 | ampout |= 0xf; | |
203 | ||
204 | if (gain_level) { | |
205 | rfvga |= RFVGA_0 << 2; | |
206 | vga |= (VGA_7 << 3) | VGA_7; | |
207 | } else { | |
208 | rfvga |= RFVGA_2 << 2; | |
209 | vga |= (VGA_6 << 3) | VGA_2; | |
210 | } | |
211 | state->gain_level = gain_level; | |
212 | ||
213 | cx24113_writereg(state, 0x1d, ampout); | |
214 | cx24113_writereg(state, 0x1f, vga); | |
215 | cx24113_writereg(state, 0x20, rfvga); | |
216 | ||
217 | return 1; /* did something */ | |
218 | } | |
219 | ||
220 | static int cx24113_set_Fref(struct cx24113_state *state, u8 high) | |
221 | { | |
222 | u8 xtal = cx24113_readreg(state, 0x02); | |
223 | if (state->rev == 0x43 && state->vcodiv == VCODIV4) | |
224 | high = 1; | |
225 | ||
226 | xtal &= ~0x2; | |
227 | if (high) | |
228 | xtal |= high << 1; | |
229 | return cx24113_writereg(state, 0x02, xtal); | |
230 | } | |
231 | ||
232 | static int cx24113_enable(struct cx24113_state *state, u8 enable) | |
233 | { | |
234 | u8 r21 = (cx24113_readreg(state, 0x21) & 0xc0) | enable; | |
235 | if (state->rev == REV_CX24113) | |
236 | r21 |= (1 << 1); | |
237 | return cx24113_writereg(state, 0x21, r21); | |
238 | } | |
239 | ||
240 | static int cx24113_set_bandwidth(struct cx24113_state *state, u32 bandwidth_khz) | |
241 | { | |
242 | u8 r; | |
243 | ||
244 | if (bandwidth_khz <= 19000) | |
245 | r = 0x03 << 6; | |
246 | else if (bandwidth_khz <= 25000) | |
247 | r = 0x02 << 6; | |
248 | else | |
249 | r = 0x01 << 6; | |
250 | ||
251 | dprintk("bandwidth to be set: %d\n", bandwidth_khz); | |
252 | bandwidth_khz *= 10; | |
253 | bandwidth_khz -= 10000; | |
254 | bandwidth_khz /= 1000; | |
255 | bandwidth_khz += 5; | |
256 | bandwidth_khz /= 10; | |
257 | ||
258 | dprintk("bandwidth: %d %d\n", r >> 6, bandwidth_khz); | |
259 | ||
260 | r |= bandwidth_khz & 0x3f; | |
261 | ||
262 | return cx24113_writereg(state, 0x1e, r); | |
263 | } | |
264 | ||
265 | static int cx24113_set_clk_inversion(struct cx24113_state *state, u8 on) | |
266 | { | |
267 | u8 r = (cx24113_readreg(state, 0x10) & 0x7f) | ((on & 0x1) << 7); | |
268 | return cx24113_writereg(state, 0x10, r); | |
269 | } | |
270 | ||
271 | static int cx24113_get_status(struct dvb_frontend *fe, u32 *status) | |
272 | { | |
273 | struct cx24113_state *state = fe->tuner_priv; | |
274 | u8 r = (cx24113_readreg(state, 0x10) & 0x02) >> 1; | |
275 | if (r) | |
276 | *status |= TUNER_STATUS_LOCKED; | |
277 | dprintk("PLL locked: %d\n", r); | |
278 | return 0; | |
279 | } | |
280 | ||
281 | static u8 cx24113_set_ref_div(struct cx24113_state *state, u8 refdiv) | |
282 | { | |
283 | if (state->rev == 0x43 && state->vcodiv == VCODIV4) | |
284 | refdiv = 2; | |
285 | return state->refdiv = refdiv; | |
286 | } | |
287 | ||
288 | static void cx24113_calc_pll_nf(struct cx24113_state *state, u16 *n, s32 *f) | |
289 | { | |
290 | s32 N; | |
291 | s64 F; | |
eb2de30b | 292 | u64 dividend; |
4c48ae8e PB |
293 | u8 R, r; |
294 | u8 vcodiv; | |
295 | u8 factor; | |
296 | s32 freq_hz = state->frequency * 1000; | |
297 | ||
298 | if (state->config->xtal_khz < 20000) | |
299 | factor = 1; | |
300 | else | |
301 | factor = 2; | |
302 | ||
303 | if (state->rev == REV_CX24113) { | |
304 | if (state->frequency >= 1100000) | |
305 | vcodiv = VCODIV2; | |
306 | else | |
307 | vcodiv = VCODIV4; | |
308 | } else { | |
309 | if (state->frequency >= 1165000) | |
310 | vcodiv = VCODIV2; | |
311 | else | |
312 | vcodiv = VCODIV4; | |
313 | } | |
314 | state->vcodiv = vcodiv; | |
315 | ||
316 | dprintk("calculating N/F for %dHz with vcodiv %d\n", freq_hz, vcodiv); | |
317 | R = 0; | |
318 | do { | |
319 | R = cx24113_set_ref_div(state, R + 1); | |
320 | ||
321 | /* calculate tuner PLL settings: */ | |
322 | N = (freq_hz / 100 * vcodiv) * R; | |
323 | N /= (state->config->xtal_khz) * factor * 2; | |
324 | N += 5; /* For round up. */ | |
325 | N /= 10; | |
326 | N -= 32; | |
327 | } while (N < 6 && R < 3); | |
328 | ||
329 | if (N < 6) { | |
d2940930 | 330 | cx_err("strange frequency: N < 6\n"); |
4c48ae8e PB |
331 | return; |
332 | } | |
333 | F = freq_hz; | |
334 | F *= (u64) (R * vcodiv * 262144); | |
cfbd3072 | 335 | dprintk("1 N: %d, F: %lld, R: %d\n", N, (long long)F, R); |
eb2de30b HV |
336 | /* do_div needs an u64 as first argument */ |
337 | dividend = F; | |
338 | do_div(dividend, state->config->xtal_khz * 1000 * factor * 2); | |
339 | F = dividend; | |
cfbd3072 | 340 | dprintk("2 N: %d, F: %lld, R: %d\n", N, (long long)F, R); |
4c48ae8e PB |
341 | F -= (N + 32) * 262144; |
342 | ||
cfbd3072 | 343 | dprintk("3 N: %d, F: %lld, R: %d\n", N, (long long)F, R); |
4c48ae8e PB |
344 | |
345 | if (state->Fwindow_enabled) { | |
346 | if (F > (262144 / 2 - 1638)) | |
347 | F = 262144 / 2 - 1638; | |
348 | if (F < (-262144 / 2 + 1638)) | |
349 | F = -262144 / 2 + 1638; | |
350 | if ((F < 3277 && F > 0) || (F > -3277 && F < 0)) { | |
351 | F = 0; | |
352 | r = cx24113_readreg(state, 0x10); | |
353 | cx24113_writereg(state, 0x10, r | (1 << 6)); | |
354 | } | |
355 | } | |
cfbd3072 | 356 | dprintk("4 N: %d, F: %lld, R: %d\n", N, (long long)F, R); |
4c48ae8e PB |
357 | |
358 | *n = (u16) N; | |
359 | *f = (s32) F; | |
360 | } | |
361 | ||
362 | ||
363 | static void cx24113_set_nfr(struct cx24113_state *state, u16 n, s32 f, u8 r) | |
364 | { | |
365 | u8 reg; | |
366 | cx24113_writereg(state, 0x19, (n >> 1) & 0xff); | |
367 | ||
368 | reg = ((n & 0x1) << 7) | ((f >> 11) & 0x7f); | |
369 | cx24113_writereg(state, 0x1a, reg); | |
370 | ||
371 | cx24113_writereg(state, 0x1b, (f >> 3) & 0xff); | |
372 | ||
373 | reg = cx24113_readreg(state, 0x1c) & 0x1f; | |
374 | cx24113_writereg(state, 0x1c, reg | ((f & 0x7) << 5)); | |
375 | ||
376 | cx24113_set_Fref(state, r - 1); | |
377 | } | |
378 | ||
379 | static int cx24113_set_frequency(struct cx24113_state *state, u32 frequency) | |
380 | { | |
381 | u8 r = 1; /* or 2 */ | |
382 | u16 n = 6; | |
383 | s32 f = 0; | |
384 | ||
826c8b60 | 385 | r = cx24113_readreg(state, 0x14); |
4c48ae8e PB |
386 | cx24113_writereg(state, 0x14, r & 0x3f); |
387 | ||
826c8b60 PB |
388 | r = cx24113_readreg(state, 0x10); |
389 | cx24113_writereg(state, 0x10, r & 0xbf); | |
4c48ae8e PB |
390 | |
391 | state->frequency = frequency; | |
392 | ||
393 | dprintk("tuning to frequency: %d\n", frequency); | |
394 | ||
826c8b60 PB |
395 | cx24113_calc_pll_nf(state, &n, &f); |
396 | cx24113_set_nfr(state, n, f, state->refdiv); | |
4c48ae8e PB |
397 | |
398 | r = cx24113_readreg(state, 0x18) & 0xbf; | |
826c8b60 | 399 | if (state->vcodiv != VCODIV2) |
4c48ae8e PB |
400 | r |= 1 << 6; |
401 | cx24113_writereg(state, 0x18, r); | |
402 | ||
403 | /* The need for this sleep is not clear. But helps in some cases */ | |
404 | msleep(5); | |
405 | ||
406 | r = cx24113_readreg(state, 0x1c) & 0xef; | |
407 | cx24113_writereg(state, 0x1c, r | (1 << 4)); | |
408 | return 0; | |
409 | } | |
410 | ||
411 | static int cx24113_init(struct dvb_frontend *fe) | |
412 | { | |
413 | struct cx24113_state *state = fe->tuner_priv; | |
414 | int ret; | |
415 | ||
416 | state->tuner_gain_thres = -50; | |
417 | state->gain_level = 255; /* to force a gain-setting initialization */ | |
418 | state->icp_mode = 0; | |
419 | ||
420 | if (state->config->xtal_khz < 11000) { | |
421 | state->icp_auto_hi = ICP_LEVEL4; | |
422 | state->icp_auto_mhi = ICP_LEVEL4; | |
423 | state->icp_auto_mlow = ICP_LEVEL3; | |
424 | state->icp_auto_low = ICP_LEVEL3; | |
425 | } else { | |
426 | state->icp_auto_hi = ICP_LEVEL4; | |
427 | state->icp_auto_mhi = ICP_LEVEL4; | |
428 | state->icp_auto_mlow = ICP_LEVEL3; | |
429 | state->icp_auto_low = ICP_LEVEL2; | |
430 | } | |
431 | ||
432 | state->icp_dig = ICP_LEVEL3; | |
433 | state->icp_man = ICP_LEVEL1; | |
434 | state->acp_on = 1; | |
435 | state->vco_mode = 0; | |
436 | state->vco_shift = 0; | |
437 | state->vco_band = VCOBANDSEL_1; | |
438 | state->bs_delay = 8; | |
439 | state->bs_freqcnt = 0x0fff; | |
440 | state->bs_rdiv = 0x0fff; | |
441 | state->prescaler_mode = 0; | |
442 | state->lna_gain = LNA_MAX_GAIN; | |
443 | state->rfvga_bias_ctrl = 1; | |
444 | state->Fwindow_enabled = 1; | |
445 | ||
446 | cx24113_set_Fref(state, 0); | |
447 | cx24113_enable(state, 0x3d); | |
448 | cx24113_set_parameters(state); | |
449 | ||
450 | cx24113_set_gain_settings(state, -30); | |
451 | ||
452 | cx24113_set_bandwidth(state, 18025); | |
453 | cx24113_set_clk_inversion(state, 1); | |
454 | ||
455 | if (state->config->xtal_khz >= 40000) | |
456 | ret = cx24113_writereg(state, 0x02, | |
457 | (cx24113_readreg(state, 0x02) & 0xfb) | (1 << 2)); | |
458 | else | |
459 | ret = cx24113_writereg(state, 0x02, | |
460 | (cx24113_readreg(state, 0x02) & 0xfb) | (0 << 2)); | |
461 | ||
462 | return ret; | |
463 | } | |
464 | ||
14d24d14 | 465 | static int cx24113_set_params(struct dvb_frontend *fe) |
4c48ae8e | 466 | { |
27b7faf1 | 467 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
4c48ae8e PB |
468 | struct cx24113_state *state = fe->tuner_priv; |
469 | /* for a ROLL-OFF factor of 0.35, 0.2: 600, 0.25: 625 */ | |
470 | u32 roll_off = 675; | |
471 | u32 bw; | |
472 | ||
27b7faf1 | 473 | bw = ((c->symbol_rate/100) * roll_off) / 1000; |
4c48ae8e PB |
474 | bw += (10000000/100) + 5; |
475 | bw /= 10; | |
476 | bw += 1000; | |
477 | cx24113_set_bandwidth(state, bw); | |
478 | ||
27b7faf1 | 479 | cx24113_set_frequency(state, c->frequency); |
4c48ae8e PB |
480 | msleep(5); |
481 | return cx24113_get_status(fe, &bw); | |
482 | } | |
483 | ||
484 | static s8 cx24113_agc_table[2][10] = { | |
485 | {-54, -41, -35, -30, -25, -21, -16, -10, -6, -2}, | |
486 | {-39, -35, -30, -25, -19, -15, -11, -5, 1, 9}, | |
487 | }; | |
488 | ||
489 | void cx24113_agc_callback(struct dvb_frontend *fe) | |
490 | { | |
491 | struct cx24113_state *state = fe->tuner_priv; | |
492 | s16 s, i; | |
493 | if (!fe->ops.read_signal_strength) | |
494 | return; | |
495 | ||
496 | do { | |
497 | /* this only works with the current CX24123 implementation */ | |
498 | fe->ops.read_signal_strength(fe, (u16 *) &s); | |
499 | s >>= 8; | |
500 | dprintk("signal strength: %d\n", s); | |
501 | for (i = 0; i < sizeof(cx24113_agc_table[0]); i++) | |
502 | if (cx24113_agc_table[state->gain_level][i] > s) | |
503 | break; | |
504 | s = -25 - i*5; | |
505 | } while (cx24113_set_gain_settings(state, s)); | |
506 | } | |
507 | EXPORT_SYMBOL(cx24113_agc_callback); | |
508 | ||
509 | static int cx24113_get_frequency(struct dvb_frontend *fe, u32 *frequency) | |
510 | { | |
511 | struct cx24113_state *state = fe->tuner_priv; | |
512 | *frequency = state->frequency; | |
513 | return 0; | |
514 | } | |
515 | ||
194ced7a | 516 | static void cx24113_release(struct dvb_frontend *fe) |
4c48ae8e PB |
517 | { |
518 | struct cx24113_state *state = fe->tuner_priv; | |
519 | dprintk("\n"); | |
826c8b60 | 520 | fe->tuner_priv = NULL; |
4c48ae8e | 521 | kfree(state); |
4c48ae8e PB |
522 | } |
523 | ||
524 | static const struct dvb_tuner_ops cx24113_tuner_ops = { | |
525 | .info = { | |
a3f90c75 MCC |
526 | .name = "Conexant CX24113", |
527 | .frequency_min_hz = 950 * MHz, | |
528 | .frequency_max_hz = 2150 * MHz, | |
529 | .frequency_step_hz = 125 * kHz, | |
4c48ae8e PB |
530 | }, |
531 | ||
532 | .release = cx24113_release, | |
533 | ||
534 | .init = cx24113_init, | |
4c48ae8e PB |
535 | |
536 | .set_params = cx24113_set_params, | |
537 | .get_frequency = cx24113_get_frequency, | |
4c48ae8e PB |
538 | .get_status = cx24113_get_status, |
539 | }; | |
540 | ||
541 | struct dvb_frontend *cx24113_attach(struct dvb_frontend *fe, | |
542 | const struct cx24113_config *config, struct i2c_adapter *i2c) | |
543 | { | |
544 | /* allocate memory for the internal state */ | |
2d3da59f | 545 | struct cx24113_state *state = kzalloc(sizeof(*state), GFP_KERNEL); |
826c8b60 | 546 | int rc; |
c38e8657 ME |
547 | |
548 | if (!state) | |
9722e569 | 549 | return NULL; |
4c48ae8e PB |
550 | |
551 | /* setup the state */ | |
552 | state->config = config; | |
553 | state->i2c = i2c; | |
554 | ||
d2940930 | 555 | cx_info("trying to detect myself\n"); |
4c48ae8e PB |
556 | |
557 | /* making a dummy read, because of some expected troubles | |
558 | * after power on */ | |
559 | cx24113_readreg(state, 0x00); | |
560 | ||
826c8b60 PB |
561 | rc = cx24113_readreg(state, 0x00); |
562 | if (rc < 0) { | |
d2940930 | 563 | cx_info("CX24113 not found.\n"); |
826c8b60 PB |
564 | goto error; |
565 | } | |
566 | state->rev = rc; | |
567 | ||
568 | switch (rc) { | |
4c48ae8e | 569 | case 0x43: |
d2940930 | 570 | cx_info("detected CX24113 variant\n"); |
4c48ae8e PB |
571 | break; |
572 | case REV_CX24113: | |
d2940930 | 573 | cx_info("successfully detected\n"); |
4c48ae8e PB |
574 | break; |
575 | default: | |
d2940930 | 576 | cx_err("unsupported device id: %x\n", state->rev); |
4c48ae8e PB |
577 | goto error; |
578 | } | |
579 | state->ver = cx24113_readreg(state, 0x01); | |
d2940930 | 580 | cx_info("version: %x\n", state->ver); |
4c48ae8e PB |
581 | |
582 | /* create dvb_frontend */ | |
583 | memcpy(&fe->ops.tuner_ops, &cx24113_tuner_ops, | |
584 | sizeof(struct dvb_tuner_ops)); | |
585 | fe->tuner_priv = state; | |
586 | return fe; | |
587 | ||
588 | error: | |
589 | kfree(state); | |
590 | ||
591 | return NULL; | |
592 | } | |
593 | EXPORT_SYMBOL(cx24113_attach); | |
594 | ||
595 | module_param(debug, int, 0644); | |
596 | MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)"); | |
597 | ||
598 | MODULE_AUTHOR("Patrick Boettcher <pb@linuxtv.org>"); | |
599 | MODULE_DESCRIPTION("DVB Frontend module for Conexant CX24113/CX24128hardware"); | |
600 | MODULE_LICENSE("GPL"); | |
601 |