1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | STB6100 Silicon Tuner |
4 | Copyright (C) Manu Abraham (abraham.manu@gmail.com) |
5 | |
6 | Copyright (C) ST Microelectronics |
7 | |
8 | */ |
9 | |
10 | #include <linux/init.h> |
11 | #include <linux/kernel.h> |
12 | #include <linux/module.h> |
13 | #include <linux/slab.h> |
14 | #include <linux/string.h> |
15 | |
16 | #include <media/dvb_frontend.h> |
17 | #include "stb6100.h" |
18 | |
19 | static unsigned int verbose; |
20 | module_param(verbose, int, 0644); |
21 | |
22 | /* Max transfer size done by I2C transfer functions */ |
23 | #define MAX_XFER_SIZE 64 |
24 | |
25 | #define FE_ERROR 0 |
26 | #define FE_NOTICE 1 |
27 | #define FE_INFO 2 |
28 | #define FE_DEBUG 3 |
29 | |
30 | #define dprintk(x, y, z, format, arg...) do { \ |
31 | if (z) { \ |
32 | if ((x > FE_ERROR) && (x > y)) \ |
33 | printk(KERN_ERR "%s: " format "\n", __func__ , ##arg); \ |
34 | else if ((x > FE_NOTICE) && (x > y)) \ |
35 | printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg); \ |
36 | else if ((x > FE_INFO) && (x > y)) \ |
37 | printk(KERN_INFO "%s: " format "\n", __func__ , ##arg); \ |
38 | else if ((x > FE_DEBUG) && (x > y)) \ |
39 | printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg); \ |
40 | } else { \ |
41 | if (x > y) \ |
42 | printk(format, ##arg); \ |
43 | } \ |
44 | } while (0) |
45 | |
46 | struct stb6100_lkup { |
47 | u32 val_low; |
48 | u32 val_high; |
49 | u8 reg; |
50 | }; |
51 | |
52 | static void stb6100_release(struct dvb_frontend *fe); |
53 | |
54 | static const struct stb6100_lkup lkup[] = { |
55 | { 0, 950000, 0x0a }, |
56 | { 950000, 1000000, 0x0a }, |
57 | { 1000000, 1075000, 0x0c }, |
58 | { 1075000, 1200000, 0x00 }, |
59 | { 1200000, 1300000, 0x01 }, |
60 | { 1300000, 1370000, 0x02 }, |
61 | { 1370000, 1470000, 0x04 }, |
62 | { 1470000, 1530000, 0x05 }, |
63 | { 1530000, 1650000, 0x06 }, |
64 | { 1650000, 1800000, 0x08 }, |
65 | { 1800000, 1950000, 0x0a }, |
66 | { 1950000, 2150000, 0x0c }, |
67 | { 2150000, 9999999, 0x0c }, |
68 | { 0, 0, 0x00 } |
69 | }; |
70 | |
71 | /* Register names for easy debugging. */ |
72 | static const char *stb6100_regnames[] = { |
73 | [STB6100_LD] = "LD" , |
74 | [STB6100_VCO] = "VCO" , |
75 | [STB6100_NI] = "NI" , |
76 | [STB6100_NF_LSB] = "NF" , |
77 | [STB6100_K] = "K" , |
78 | [STB6100_G] = "G" , |
79 | [STB6100_F] = "F" , |
80 | [STB6100_DLB] = "DLB" , |
81 | [STB6100_TEST1] = "TEST1" , |
82 | [STB6100_FCCK] = "FCCK" , |
83 | [STB6100_LPEN] = "LPEN" , |
84 | [STB6100_TEST3] = "TEST3" , |
85 | }; |
86 | |
87 | /* Template for normalisation, i.e. setting unused or undocumented |
88 | * bits as required according to the documentation. |
89 | */ |
90 | struct stb6100_regmask { |
91 | u8 mask; |
92 | u8 set; |
93 | }; |
94 | |
95 | static const struct stb6100_regmask stb6100_template[] = { |
96 | [STB6100_LD] = { 0xff, 0x00 }, |
97 | [STB6100_VCO] = { 0xff, 0x00 }, |
98 | [STB6100_NI] = { 0xff, 0x00 }, |
99 | [STB6100_NF_LSB] = { 0xff, 0x00 }, |
100 | [STB6100_K] = { 0xc7, 0x38 }, |
101 | [STB6100_G] = { 0xef, 0x10 }, |
102 | [STB6100_F] = { 0x1f, 0xc0 }, |
103 | [STB6100_DLB] = { 0x38, 0xc4 }, |
104 | [STB6100_TEST1] = { 0x00, 0x8f }, |
105 | [STB6100_FCCK] = { 0x40, 0x0d }, |
106 | [STB6100_LPEN] = { 0xf0, 0x0b }, |
107 | [STB6100_TEST3] = { 0x00, 0xde }, |
108 | }; |
109 | |
110 | /* |
111 | * Currently unused. Some boards might need it in the future |
112 | */ |
113 | static __always_unused inline void stb6100_normalise_regs(u8 regs[]) |
114 | { |
115 | int i; |
116 | |
117 | for (i = 0; i < STB6100_NUMREGS; i++) |
118 | regs[i] = (regs[i] & stb6100_template[i].mask) | stb6100_template[i].set; |
119 | } |
120 | |
121 | static int stb6100_read_regs(struct stb6100_state *state, u8 regs[]) |
122 | { |
123 | int rc; |
124 | struct i2c_msg msg = { |
125 | .addr = state->config->tuner_address, |
126 | .flags = I2C_M_RD, |
127 | .buf = regs, |
128 | .len = STB6100_NUMREGS |
129 | }; |
130 | |
131 | rc = i2c_transfer(adap: state->i2c, msgs: &msg, num: 1); |
132 | if (unlikely(rc != 1)) { |
133 | dprintk(verbose, FE_ERROR, 1, "Read (0x%x) err, rc=[%d]" , |
134 | state->config->tuner_address, rc); |
135 | |
136 | return -EREMOTEIO; |
137 | } |
138 | if (unlikely(verbose > FE_DEBUG)) { |
139 | int i; |
140 | |
141 | dprintk(verbose, FE_DEBUG, 1, " Read from 0x%02x" , state->config->tuner_address); |
142 | for (i = 0; i < STB6100_NUMREGS; i++) |
143 | dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x" , stb6100_regnames[i], regs[i]); |
144 | } |
145 | return 0; |
146 | } |
147 | |
148 | static int stb6100_read_reg(struct stb6100_state *state, u8 reg) |
149 | { |
150 | u8 regs[STB6100_NUMREGS]; |
151 | |
152 | struct i2c_msg msg = { |
153 | .addr = state->config->tuner_address + reg, |
154 | .flags = I2C_M_RD, |
155 | .buf = regs, |
156 | .len = 1 |
157 | }; |
158 | |
159 | i2c_transfer(adap: state->i2c, msgs: &msg, num: 1); |
160 | |
161 | if (unlikely(reg >= STB6100_NUMREGS)) { |
162 | dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x" , reg); |
163 | return -EINVAL; |
164 | } |
165 | if (unlikely(verbose > FE_DEBUG)) { |
166 | dprintk(verbose, FE_DEBUG, 1, " Read from 0x%02x" , state->config->tuner_address); |
167 | dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x" , stb6100_regnames[reg], regs[0]); |
168 | } |
169 | |
170 | return (unsigned int)regs[0]; |
171 | } |
172 | |
173 | static int stb6100_write_reg_range(struct stb6100_state *state, u8 buf[], int start, int len) |
174 | { |
175 | int rc; |
176 | u8 cmdbuf[MAX_XFER_SIZE]; |
177 | struct i2c_msg msg = { |
178 | .addr = state->config->tuner_address, |
179 | .flags = 0, |
180 | .buf = cmdbuf, |
181 | .len = len + 1 |
182 | }; |
183 | |
184 | if (1 + len > sizeof(cmdbuf)) { |
185 | printk(KERN_WARNING |
186 | "%s: i2c wr: len=%d is too big!\n" , |
187 | KBUILD_MODNAME, len); |
188 | return -EINVAL; |
189 | } |
190 | |
191 | if (unlikely(start < 1 || start + len > STB6100_NUMREGS)) { |
192 | dprintk(verbose, FE_ERROR, 1, "Invalid register range %d:%d" , |
193 | start, len); |
194 | return -EINVAL; |
195 | } |
196 | memcpy(&cmdbuf[1], buf, len); |
197 | cmdbuf[0] = start; |
198 | |
199 | if (unlikely(verbose > FE_DEBUG)) { |
200 | int i; |
201 | |
202 | dprintk(verbose, FE_DEBUG, 1, " Write @ 0x%02x: [%d:%d]" , state->config->tuner_address, start, len); |
203 | for (i = 0; i < len; i++) |
204 | dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x" , stb6100_regnames[start + i], buf[i]); |
205 | } |
206 | rc = i2c_transfer(adap: state->i2c, msgs: &msg, num: 1); |
207 | if (unlikely(rc != 1)) { |
208 | dprintk(verbose, FE_ERROR, 1, "(0x%x) write err [%d:%d], rc=[%d]" , |
209 | (unsigned int)state->config->tuner_address, start, len, rc); |
210 | return -EREMOTEIO; |
211 | } |
212 | return 0; |
213 | } |
214 | |
215 | static int stb6100_write_reg(struct stb6100_state *state, u8 reg, u8 data) |
216 | { |
217 | u8 tmp = data; /* see gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 */ |
218 | |
219 | if (unlikely(reg >= STB6100_NUMREGS)) { |
220 | dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x" , reg); |
221 | return -EREMOTEIO; |
222 | } |
223 | tmp = (tmp & stb6100_template[reg].mask) | stb6100_template[reg].set; |
224 | return stb6100_write_reg_range(state, buf: &tmp, start: reg, len: 1); |
225 | } |
226 | |
227 | |
228 | static int stb6100_get_status(struct dvb_frontend *fe, u32 *status) |
229 | { |
230 | int rc; |
231 | struct stb6100_state *state = fe->tuner_priv; |
232 | |
233 | rc = stb6100_read_reg(state, STB6100_LD); |
234 | if (rc < 0) { |
235 | dprintk(verbose, FE_ERROR, 1, "%s failed" , __func__); |
236 | return rc; |
237 | } |
238 | return (rc & STB6100_LD_LOCK) ? TUNER_STATUS_LOCKED : 0; |
239 | } |
240 | |
241 | static int stb6100_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) |
242 | { |
243 | int rc; |
244 | u8 f; |
245 | u32 bw; |
246 | struct stb6100_state *state = fe->tuner_priv; |
247 | |
248 | rc = stb6100_read_reg(state, STB6100_F); |
249 | if (rc < 0) |
250 | return rc; |
251 | f = rc & STB6100_F_F; |
252 | |
253 | bw = (f + 5) * 2000; /* x2 for ZIF */ |
254 | |
255 | *bandwidth = state->bandwidth = bw * 1000; |
256 | dprintk(verbose, FE_DEBUG, 1, "bandwidth = %u Hz" , state->bandwidth); |
257 | return 0; |
258 | } |
259 | |
260 | static int stb6100_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth) |
261 | { |
262 | u32 tmp; |
263 | int rc; |
264 | struct stb6100_state *state = fe->tuner_priv; |
265 | |
266 | dprintk(verbose, FE_DEBUG, 1, "set bandwidth to %u Hz" , bandwidth); |
267 | |
268 | bandwidth /= 2; /* ZIF */ |
269 | |
270 | if (bandwidth >= 36000000) /* F[4:0] BW/2 max =31+5=36 mhz for F=31 */ |
271 | tmp = 31; |
272 | else if (bandwidth <= 5000000) /* bw/2 min = 5Mhz for F=0 */ |
273 | tmp = 0; |
274 | else /* if 5 < bw/2 < 36 */ |
275 | tmp = (bandwidth + 500000) / 1000000 - 5; |
276 | |
277 | /* Turn on LPF bandwidth setting clock control, |
278 | * set bandwidth, wait 10ms, turn off. |
279 | */ |
280 | rc = stb6100_write_reg(state, STB6100_FCCK, data: 0x0d | STB6100_FCCK_FCCK); |
281 | if (rc < 0) |
282 | return rc; |
283 | rc = stb6100_write_reg(state, STB6100_F, data: 0xc0 | tmp); |
284 | if (rc < 0) |
285 | return rc; |
286 | |
287 | msleep(msecs: 5); /* This is dangerous as another (related) thread may start */ |
288 | |
289 | rc = stb6100_write_reg(state, STB6100_FCCK, data: 0x0d); |
290 | if (rc < 0) |
291 | return rc; |
292 | |
293 | msleep(msecs: 10); /* This is dangerous as another (related) thread may start */ |
294 | |
295 | return 0; |
296 | } |
297 | |
298 | static int stb6100_get_frequency(struct dvb_frontend *fe, u32 *frequency) |
299 | { |
300 | int rc; |
301 | u32 nint, nfrac, fvco; |
302 | int psd2, odiv; |
303 | struct stb6100_state *state = fe->tuner_priv; |
304 | u8 regs[STB6100_NUMREGS]; |
305 | |
306 | rc = stb6100_read_regs(state, regs); |
307 | if (rc < 0) |
308 | return rc; |
309 | |
310 | odiv = (regs[STB6100_VCO] & STB6100_VCO_ODIV) >> STB6100_VCO_ODIV_SHIFT; |
311 | psd2 = (regs[STB6100_K] & STB6100_K_PSD2) >> STB6100_K_PSD2_SHIFT; |
312 | nint = regs[STB6100_NI]; |
313 | nfrac = ((regs[STB6100_K] & STB6100_K_NF_MSB) << 8) | regs[STB6100_NF_LSB]; |
314 | fvco = (nfrac * state->reference >> (9 - psd2)) + (nint * state->reference << psd2); |
315 | *frequency = state->frequency = fvco >> (odiv + 1); |
316 | |
317 | dprintk(verbose, FE_DEBUG, 1, |
318 | "frequency = %u kHz, odiv = %u, psd2 = %u, fxtal = %u kHz, fvco = %u kHz, N(I) = %u, N(F) = %u" , |
319 | state->frequency, odiv, psd2, state->reference, fvco, nint, nfrac); |
320 | return 0; |
321 | } |
322 | |
323 | |
324 | static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency) |
325 | { |
326 | int rc; |
327 | const struct stb6100_lkup *ptr; |
328 | struct stb6100_state *state = fe->tuner_priv; |
329 | struct dtv_frontend_properties *p = &fe->dtv_property_cache; |
330 | |
331 | u32 srate = 0, fvco, nint, nfrac; |
332 | u8 regs[STB6100_NUMREGS]; |
333 | u8 g, psd2, odiv; |
334 | |
335 | dprintk(verbose, FE_DEBUG, 1, "Version 2010-8-14 13:51" ); |
336 | |
337 | if (fe->ops.get_frontend) { |
338 | dprintk(verbose, FE_DEBUG, 1, "Get frontend parameters" ); |
339 | fe->ops.get_frontend(fe, p); |
340 | } |
341 | srate = p->symbol_rate; |
342 | |
343 | /* Set up tuner cleanly, LPF calibration on */ |
344 | rc = stb6100_write_reg(state, STB6100_FCCK, data: 0x4d | STB6100_FCCK_FCCK); |
345 | if (rc < 0) |
346 | return rc; /* allow LPF calibration */ |
347 | |
348 | /* PLL Loop disabled, bias on, VCO on, synth on */ |
349 | regs[STB6100_LPEN] = 0xeb; |
350 | rc = stb6100_write_reg(state, STB6100_LPEN, data: regs[STB6100_LPEN]); |
351 | if (rc < 0) |
352 | return rc; |
353 | |
354 | /* Program the registers with their data values */ |
355 | |
356 | /* VCO divide ratio (LO divide ratio, VCO prescaler enable). */ |
357 | if (frequency <= 1075000) |
358 | odiv = 1; |
359 | else |
360 | odiv = 0; |
361 | |
362 | /* VCO enabled, search clock off as per LL3.7, 3.4.1 */ |
363 | regs[STB6100_VCO] = 0xe0 | (odiv << STB6100_VCO_ODIV_SHIFT); |
364 | |
365 | /* OSM */ |
366 | for (ptr = lkup; |
367 | (ptr->val_high != 0) && !CHKRANGE(frequency, ptr->val_low, ptr->val_high); |
368 | ptr++); |
369 | |
370 | if (ptr->val_high == 0) { |
371 | printk(KERN_ERR "%s: frequency out of range: %u kHz\n" , __func__, frequency); |
372 | return -EINVAL; |
373 | } |
374 | regs[STB6100_VCO] = (regs[STB6100_VCO] & ~STB6100_VCO_OSM) | ptr->reg; |
375 | rc = stb6100_write_reg(state, STB6100_VCO, data: regs[STB6100_VCO]); |
376 | if (rc < 0) |
377 | return rc; |
378 | |
379 | if ((frequency > 1075000) && (frequency <= 1325000)) |
380 | psd2 = 0; |
381 | else |
382 | psd2 = 1; |
383 | /* F(VCO) = F(LO) * (ODIV == 0 ? 2 : 4) */ |
384 | fvco = frequency << (1 + odiv); |
385 | /* N(I) = floor(f(VCO) / (f(XTAL) * (PSD2 ? 2 : 1))) */ |
386 | nint = fvco / (state->reference << psd2); |
387 | /* N(F) = round(f(VCO) / f(XTAL) * (PSD2 ? 2 : 1) - N(I)) * 2 ^ 9 */ |
388 | nfrac = DIV_ROUND_CLOSEST((fvco - (nint * state->reference << psd2)) |
389 | << (9 - psd2), state->reference); |
390 | |
391 | /* NI */ |
392 | regs[STB6100_NI] = nint; |
393 | rc = stb6100_write_reg(state, STB6100_NI, data: regs[STB6100_NI]); |
394 | if (rc < 0) |
395 | return rc; |
396 | |
397 | /* NF */ |
398 | regs[STB6100_NF_LSB] = nfrac; |
399 | rc = stb6100_write_reg(state, STB6100_NF_LSB, data: regs[STB6100_NF_LSB]); |
400 | if (rc < 0) |
401 | return rc; |
402 | |
403 | /* K */ |
404 | regs[STB6100_K] = (0x38 & ~STB6100_K_PSD2) | (psd2 << STB6100_K_PSD2_SHIFT); |
405 | regs[STB6100_K] = (regs[STB6100_K] & ~STB6100_K_NF_MSB) | ((nfrac >> 8) & STB6100_K_NF_MSB); |
406 | rc = stb6100_write_reg(state, STB6100_K, data: regs[STB6100_K]); |
407 | if (rc < 0) |
408 | return rc; |
409 | |
410 | /* G Baseband gain. */ |
411 | if (srate >= 15000000) |
412 | g = 9; /* +4 dB */ |
413 | else if (srate >= 5000000) |
414 | g = 11; /* +8 dB */ |
415 | else |
416 | g = 14; /* +14 dB */ |
417 | |
418 | regs[STB6100_G] = (0x10 & ~STB6100_G_G) | g; |
419 | regs[STB6100_G] &= ~STB6100_G_GCT; /* mask GCT */ |
420 | regs[STB6100_G] |= (1 << 5); /* 2Vp-p Mode */ |
421 | rc = stb6100_write_reg(state, STB6100_G, data: regs[STB6100_G]); |
422 | if (rc < 0) |
423 | return rc; |
424 | |
425 | /* F we don't write as it is set up in BW set */ |
426 | |
427 | /* DLB set DC servo loop BW to 160Hz (LLA 3.8 / 2.1) */ |
428 | regs[STB6100_DLB] = 0xcc; |
429 | rc = stb6100_write_reg(state, STB6100_DLB, data: regs[STB6100_DLB]); |
430 | if (rc < 0) |
431 | return rc; |
432 | |
433 | dprintk(verbose, FE_DEBUG, 1, |
434 | "frequency = %u, srate = %u, g = %u, odiv = %u, psd2 = %u, fxtal = %u, osm = %u, fvco = %u, N(I) = %u, N(F) = %u" , |
435 | frequency, srate, (unsigned int)g, (unsigned int)odiv, |
436 | (unsigned int)psd2, state->reference, |
437 | ptr->reg, fvco, nint, nfrac); |
438 | |
439 | /* Set up the test registers */ |
440 | regs[STB6100_TEST1] = 0x8f; |
441 | rc = stb6100_write_reg(state, STB6100_TEST1, data: regs[STB6100_TEST1]); |
442 | if (rc < 0) |
443 | return rc; |
444 | regs[STB6100_TEST3] = 0xde; |
445 | rc = stb6100_write_reg(state, STB6100_TEST3, data: regs[STB6100_TEST3]); |
446 | if (rc < 0) |
447 | return rc; |
448 | |
449 | /* Bring up tuner according to LLA 3.7 3.4.1, step 2 */ |
450 | regs[STB6100_LPEN] = 0xfb; /* PLL Loop enabled, bias on, VCO on, synth on */ |
451 | rc = stb6100_write_reg(state, STB6100_LPEN, data: regs[STB6100_LPEN]); |
452 | if (rc < 0) |
453 | return rc; |
454 | |
455 | msleep(msecs: 2); |
456 | |
457 | /* Bring up tuner according to LLA 3.7 3.4.1, step 3 */ |
458 | regs[STB6100_VCO] &= ~STB6100_VCO_OCK; /* VCO fast search */ |
459 | rc = stb6100_write_reg(state, STB6100_VCO, data: regs[STB6100_VCO]); |
460 | if (rc < 0) |
461 | return rc; |
462 | |
463 | msleep(msecs: 10); /* This is dangerous as another (related) thread may start */ /* wait for LO to lock */ |
464 | |
465 | regs[STB6100_VCO] &= ~STB6100_VCO_OSCH; /* vco search disabled */ |
466 | regs[STB6100_VCO] |= STB6100_VCO_OCK; /* search clock off */ |
467 | rc = stb6100_write_reg(state, STB6100_VCO, data: regs[STB6100_VCO]); |
468 | if (rc < 0) |
469 | return rc; |
470 | |
471 | rc = stb6100_write_reg(state, STB6100_FCCK, data: 0x0d); |
472 | if (rc < 0) |
473 | return rc; /* Stop LPF calibration */ |
474 | |
475 | msleep(msecs: 10); /* This is dangerous as another (related) thread may start */ |
476 | /* wait for stabilisation, (should not be necessary) */ |
477 | return 0; |
478 | } |
479 | |
480 | static int stb6100_sleep(struct dvb_frontend *fe) |
481 | { |
482 | /* TODO: power down */ |
483 | return 0; |
484 | } |
485 | |
486 | static int stb6100_init(struct dvb_frontend *fe) |
487 | { |
488 | struct stb6100_state *state = fe->tuner_priv; |
489 | int refclk = 27000000; /* Hz */ |
490 | |
491 | /* |
492 | * iqsense = 1 |
493 | * tunerstep = 125000 |
494 | */ |
495 | state->bandwidth = 36000000; /* Hz */ |
496 | state->reference = refclk / 1000; /* kHz */ |
497 | |
498 | /* Set default bandwidth. Modified, PN 13-May-10 */ |
499 | return 0; |
500 | } |
501 | |
502 | static int stb6100_set_params(struct dvb_frontend *fe) |
503 | { |
504 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
505 | |
506 | if (c->frequency > 0) |
507 | stb6100_set_frequency(fe, frequency: c->frequency); |
508 | |
509 | if (c->bandwidth_hz > 0) |
510 | stb6100_set_bandwidth(fe, bandwidth: c->bandwidth_hz); |
511 | |
512 | return 0; |
513 | } |
514 | |
515 | static const struct dvb_tuner_ops stb6100_ops = { |
516 | .info = { |
517 | .name = "STB6100 Silicon Tuner" , |
518 | .frequency_min_hz = 950 * MHz, |
519 | .frequency_max_hz = 2150 * MHz, |
520 | }, |
521 | |
522 | .init = stb6100_init, |
523 | .sleep = stb6100_sleep, |
524 | .get_status = stb6100_get_status, |
525 | .set_params = stb6100_set_params, |
526 | .get_frequency = stb6100_get_frequency, |
527 | .get_bandwidth = stb6100_get_bandwidth, |
528 | .release = stb6100_release |
529 | }; |
530 | |
531 | struct dvb_frontend *stb6100_attach(struct dvb_frontend *fe, |
532 | const struct stb6100_config *config, |
533 | struct i2c_adapter *i2c) |
534 | { |
535 | struct stb6100_state *state = NULL; |
536 | |
537 | state = kzalloc(size: sizeof (struct stb6100_state), GFP_KERNEL); |
538 | if (!state) |
539 | return NULL; |
540 | |
541 | state->config = config; |
542 | state->i2c = i2c; |
543 | state->frontend = fe; |
544 | state->reference = config->refclock / 1000; /* kHz */ |
545 | fe->tuner_priv = state; |
546 | fe->ops.tuner_ops = stb6100_ops; |
547 | |
548 | printk("%s: Attaching STB6100 \n" , __func__); |
549 | return fe; |
550 | } |
551 | |
552 | static void stb6100_release(struct dvb_frontend *fe) |
553 | { |
554 | struct stb6100_state *state = fe->tuner_priv; |
555 | |
556 | fe->tuner_priv = NULL; |
557 | kfree(objp: state); |
558 | } |
559 | |
560 | EXPORT_SYMBOL_GPL(stb6100_attach); |
561 | MODULE_PARM_DESC(verbose, "Set Verbosity level" ); |
562 | |
563 | MODULE_AUTHOR("Manu Abraham" ); |
564 | MODULE_DESCRIPTION("STB6100 Silicon tuner" ); |
565 | MODULE_LICENSE("GPL" ); |
566 | |