1 /*
2  * Driver for the Texas Instruments WL1273 FM radio.
3  *
4  * Copyright (C) 2011 Nokia Corporation
5  * Author: Matti J. Aaltonen <matti.j.aaltonen@nokia.com>
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * version 2 as published by the Free Software Foundation.
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 
17 #include <linux/delay.h>
18 #include <linux/firmware.h>
19 #include <linux/interrupt.h>
20 #include <linux/mfd/wl1273-core.h>
21 #include <linux/slab.h>
22 #include <linux/module.h>
23 #include <media/v4l2-common.h>
24 #include <media/v4l2-ctrls.h>
25 #include <media/v4l2-device.h>
26 #include <media/v4l2-ioctl.h>
27 
28 #define DRIVER_DESC "Wl1273 FM Radio"
29 
30 #define WL1273_POWER_SET_OFF		0
31 #define WL1273_POWER_SET_FM		BIT(0)
32 #define WL1273_POWER_SET_RDS		BIT(1)
33 #define WL1273_POWER_SET_RETENTION	BIT(4)
34 
35 #define WL1273_PUPD_SET_OFF		0x00
36 #define WL1273_PUPD_SET_ON		0x01
37 #define WL1273_PUPD_SET_RETENTION	0x10
38 
39 #define WL1273_FREQ(x)		(x * 10000 / 625)
40 #define WL1273_INV_FREQ(x)	(x * 625 / 10000)
41 
42 /*
43  * static int radio_nr - The number of the radio device
44  *
45  * The default is 0.
46  */
47 static int radio_nr;
48 module_param(radio_nr, int, 0);
49 MODULE_PARM_DESC(radio_nr, "The number of the radio device. Default = 0");
50 
51 struct wl1273_device {
52 	char *bus_type;
53 
54 	u8 forbidden;
55 	unsigned int preemphasis;
56 	unsigned int spacing;
57 	unsigned int tx_power;
58 	unsigned int rx_frequency;
59 	unsigned int tx_frequency;
60 	unsigned int rangelow;
61 	unsigned int rangehigh;
62 	unsigned int band;
63 	bool stereo;
64 
65 	/* RDS */
66 	unsigned int rds_on;
67 
68 	wait_queue_head_t read_queue;
69 	struct mutex lock; /* for serializing fm radio operations */
70 	struct completion busy;
71 
72 	unsigned char *buffer;
73 	unsigned int buf_size;
74 	unsigned int rd_index;
75 	unsigned int wr_index;
76 
77 	/* Selected interrupts */
78 	u16 irq_flags;
79 	u16 irq_received;
80 
81 	struct v4l2_ctrl_handler ctrl_handler;
82 	struct v4l2_device v4l2dev;
83 	struct video_device videodev;
84 	struct device *dev;
85 	struct wl1273_core *core;
86 	struct file *owner;
87 	char *write_buf;
88 	unsigned int rds_users;
89 };
90 
91 #define WL1273_IRQ_MASK	 (WL1273_FR_EVENT		|	\
92 			  WL1273_POW_ENB_EVENT)
93 
94 /*
95  * static unsigned int rds_buf - the number of RDS buffer blocks used.
96  *
97  * The default number is 100.
98  */
99 static unsigned int rds_buf = 100;
100 module_param(rds_buf, uint, 0);
101 MODULE_PARM_DESC(rds_buf, "Number of RDS buffer entries. Default = 100");
102 
103 static int wl1273_fm_write_fw(struct wl1273_core *core,
104 			      __u8 *fw, int len)
105 {
106 	struct i2c_client *client = core->client;
107 	struct i2c_msg msg;
108 	int i, r = 0;
109 
110 	msg.addr = client->addr;
111 	msg.flags = 0;
112 
113 	for (i = 0; i <= len; i++) {
114 		msg.len = fw[0];
115 		msg.buf = fw + 1;
116 
117 		fw += msg.len + 1;
118 		dev_dbg(&client->dev, "%s:len[%d]: %d\n", __func__, i, msg.len);
119 
120 		r = i2c_transfer(client->adapter, &msg, 1);
121 		if (r < 0 && i < len + 1)
122 			break;
123 	}
124 
125 	dev_dbg(&client->dev, "%s: i: %d\n", __func__, i);
126 	dev_dbg(&client->dev, "%s: len + 1: %d\n", __func__, len + 1);
127 
128 	/* Last transfer always fails. */
129 	if (i == len || r == 1)
130 		r = 0;
131 
132 	return r;
133 }
134 
135 #define WL1273_FIFO_HAS_DATA(status)	(1 << 5 & status)
136 #define WL1273_RDS_CORRECTABLE_ERROR	(1 << 3)
137 #define WL1273_RDS_UNCORRECTABLE_ERROR	(1 << 4)
138 
139 static int wl1273_fm_rds(struct wl1273_device *radio)
140 {
141 	struct wl1273_core *core = radio->core;
142 	struct i2c_client *client = core->client;
143 	u16 val;
144 	u8 b0 = WL1273_RDS_DATA_GET, status;
145 	struct v4l2_rds_data rds = { 0, 0, 0 };
146 	struct i2c_msg msg[] = {
147 		{
148 			.addr = client->addr,
149 			.flags = 0,
150 			.buf = &b0,
151 			.len = 1,
152 		},
153 		{
154 			.addr = client->addr,
155 			.flags = I2C_M_RD,
156 			.buf = (u8 *) &rds,
157 			.len = sizeof(rds),
158 		}
159 	};
160 	int r;
161 
162 	if (core->mode != WL1273_MODE_RX)
163 		return 0;
164 
165 	r = core->read(core, WL1273_RDS_SYNC_GET, &val);
166 	if (r)
167 		return r;
168 
169 	if ((val & 0x01) == 0) {
170 		/* RDS decoder not synchronized */
171 		return -EAGAIN;
172 	}
173 
174 	/* copy all four RDS blocks to internal buffer */
175 	do {
176 		r = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
177 		if (r != ARRAY_SIZE(msg)) {
178 			dev_err(radio->dev, WL1273_FM_DRIVER_NAME
179 				": %s: read_rds error r == %i)\n",
180 				__func__, r);
181 		}
182 
183 		status = rds.block;
184 
185 		if (!WL1273_FIFO_HAS_DATA(status))
186 			break;
187 
188 		/* copy bits 0-2 (the block ID) to bits 3-5 */
189 		rds.block = V4L2_RDS_BLOCK_MSK & status;
190 		rds.block |= rds.block << 3;
191 
192 		/* copy the error bits to standard positions */
193 		if (WL1273_RDS_UNCORRECTABLE_ERROR & status) {
194 			rds.block |= V4L2_RDS_BLOCK_ERROR;
195 			rds.block &= ~V4L2_RDS_BLOCK_CORRECTED;
196 		} else if  (WL1273_RDS_CORRECTABLE_ERROR & status) {
197 			rds.block &= ~V4L2_RDS_BLOCK_ERROR;
198 			rds.block |= V4L2_RDS_BLOCK_CORRECTED;
199 		}
200 
201 		/* copy RDS block to internal buffer */
202 		memcpy(&radio->buffer[radio->wr_index], &rds, RDS_BLOCK_SIZE);
203 		radio->wr_index += 3;
204 
205 		/* wrap write pointer */
206 		if (radio->wr_index >= radio->buf_size)
207 			radio->wr_index = 0;
208 
209 		/* check for overflow & start over */
210 		if (radio->wr_index == radio->rd_index) {
211 			dev_dbg(radio->dev, "RDS OVERFLOW");
212 
213 			radio->rd_index = 0;
214 			radio->wr_index = 0;
215 			break;
216 		}
217 	} while (WL1273_FIFO_HAS_DATA(status));
218 
219 	/* wake up read queue */
220 	if (radio->wr_index != radio->rd_index)
221 		wake_up_interruptible(&radio->read_queue);
222 
223 	return 0;
224 }
225 
226 static irqreturn_t wl1273_fm_irq_thread_handler(int irq, void *dev_id)
227 {
228 	struct wl1273_device *radio = dev_id;
229 	struct wl1273_core *core = radio->core;
230 	u16 flags;
231 	int r;
232 
233 	r = core->read(core, WL1273_FLAG_GET, &flags);
234 	if (r)
235 		goto out;
236 
237 	if (flags & WL1273_BL_EVENT) {
238 		radio->irq_received = flags;
239 		dev_dbg(radio->dev, "IRQ: BL\n");
240 	}
241 
242 	if (flags & WL1273_RDS_EVENT) {
243 		msleep(200);
244 
245 		wl1273_fm_rds(radio);
246 	}
247 
248 	if (flags & WL1273_BBLK_EVENT)
249 		dev_dbg(radio->dev, "IRQ: BBLK\n");
250 
251 	if (flags & WL1273_LSYNC_EVENT)
252 		dev_dbg(radio->dev, "IRQ: LSYNC\n");
253 
254 	if (flags & WL1273_LEV_EVENT) {
255 		u16 level;
256 
257 		r = core->read(core, WL1273_RSSI_LVL_GET, &level);
258 		if (r)
259 			goto out;
260 
261 		if (level > 14)
262 			dev_dbg(radio->dev, "IRQ: LEV: 0x%x04\n", level);
263 	}
264 
265 	if (flags & WL1273_IFFR_EVENT)
266 		dev_dbg(radio->dev, "IRQ: IFFR\n");
267 
268 	if (flags & WL1273_PI_EVENT)
269 		dev_dbg(radio->dev, "IRQ: PI\n");
270 
271 	if (flags & WL1273_PD_EVENT)
272 		dev_dbg(radio->dev, "IRQ: PD\n");
273 
274 	if (flags & WL1273_STIC_EVENT)
275 		dev_dbg(radio->dev, "IRQ: STIC\n");
276 
277 	if (flags & WL1273_MAL_EVENT)
278 		dev_dbg(radio->dev, "IRQ: MAL\n");
279 
280 	if (flags & WL1273_POW_ENB_EVENT) {
281 		complete(&radio->busy);
282 		dev_dbg(radio->dev, "NOT BUSY\n");
283 		dev_dbg(radio->dev, "IRQ: POW_ENB\n");
284 	}
285 
286 	if (flags & WL1273_SCAN_OVER_EVENT)
287 		dev_dbg(radio->dev, "IRQ: SCAN_OVER\n");
288 
289 	if (flags & WL1273_ERROR_EVENT)
290 		dev_dbg(radio->dev, "IRQ: ERROR\n");
291 
292 	if (flags & WL1273_FR_EVENT) {
293 		u16 freq;
294 
295 		dev_dbg(radio->dev, "IRQ: FR:\n");
296 
297 		if (core->mode == WL1273_MODE_RX) {
298 			r = core->write(core, WL1273_TUNER_MODE_SET,
299 					TUNER_MODE_STOP_SEARCH);
300 			if (r) {
301 				dev_err(radio->dev,
302 					"%s: TUNER_MODE_SET fails: %d\n",
303 					__func__, r);
304 				goto out;
305 			}
306 
307 			r = core->read(core, WL1273_FREQ_SET, &freq);
308 			if (r)
309 				goto out;
310 
311 			if (radio->band == WL1273_BAND_JAPAN)
312 				radio->rx_frequency = WL1273_BAND_JAPAN_LOW +
313 					freq * 50;
314 			else
315 				radio->rx_frequency = WL1273_BAND_OTHER_LOW +
316 					freq * 50;
317 			/*
318 			 *  The driver works better with this msleep,
319 			 *  the documentation doesn't mention it.
320 			 */
321 			usleep_range(10000, 15000);
322 
323 			dev_dbg(radio->dev, "%dkHz\n", radio->rx_frequency);
324 
325 		} else {
326 			r = core->read(core, WL1273_CHANL_SET, &freq);
327 			if (r)
328 				goto out;
329 
330 			dev_dbg(radio->dev, "%dkHz\n", freq);
331 		}
332 		dev_dbg(radio->dev, "%s: NOT BUSY\n", __func__);
333 	}
334 
335 out:
336 	core->write(core, WL1273_INT_MASK_SET, radio->irq_flags);
337 	complete(&radio->busy);
338 
339 	return IRQ_HANDLED;
340 }
341 
342 static int wl1273_fm_set_tx_freq(struct wl1273_device *radio, unsigned int freq)
343 {
344 	struct wl1273_core *core = radio->core;
345 	int r = 0;
346 	unsigned long t;
347 
348 	if (freq < WL1273_BAND_TX_LOW) {
349 		dev_err(radio->dev,
350 			"Frequency out of range: %d < %d\n", freq,
351 			WL1273_BAND_TX_LOW);
352 		return -ERANGE;
353 	}
354 
355 	if (freq > WL1273_BAND_TX_HIGH) {
356 		dev_err(radio->dev,
357 			"Frequency out of range: %d > %d\n", freq,
358 			WL1273_BAND_TX_HIGH);
359 		return -ERANGE;
360 	}
361 
362 	/*
363 	 *  The driver works better with this sleep,
364 	 *  the documentation doesn't mention it.
365 	 */
366 	usleep_range(5000, 10000);
367 
368 	dev_dbg(radio->dev, "%s: freq: %d kHz\n", __func__, freq);
369 
370 	/* Set the current tx channel */
371 	r = core->write(core, WL1273_CHANL_SET, freq / 10);
372 	if (r)
373 		return r;
374 
375 	reinit_completion(&radio->busy);
376 
377 	/* wait for the FR IRQ */
378 	t = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(2000));
379 	if (!t)
380 		return -ETIMEDOUT;
381 
382 	dev_dbg(radio->dev, "WL1273_CHANL_SET: %lu\n", t);
383 
384 	/* Enable the output power */
385 	r = core->write(core, WL1273_POWER_ENB_SET, 1);
386 	if (r)
387 		return r;
388 
389 	reinit_completion(&radio->busy);
390 
391 	/* wait for the POWER_ENB IRQ */
392 	t = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(1000));
393 	if (!t)
394 		return -ETIMEDOUT;
395 
396 	radio->tx_frequency = freq;
397 	dev_dbg(radio->dev, "WL1273_POWER_ENB_SET: %lu\n", t);
398 
399 	return	0;
400 }
401 
402 static int wl1273_fm_set_rx_freq(struct wl1273_device *radio, unsigned int freq)
403 {
404 	struct wl1273_core *core = radio->core;
405 	int r, f;
406 	unsigned long t;
407 
408 	if (freq < radio->rangelow) {
409 		dev_err(radio->dev,
410 			"Frequency out of range: %d < %d\n", freq,
411 			radio->rangelow);
412 		r = -ERANGE;
413 		goto err;
414 	}
415 
416 	if (freq > radio->rangehigh) {
417 		dev_err(radio->dev,
418 			"Frequency out of range: %d > %d\n", freq,
419 			radio->rangehigh);
420 		r = -ERANGE;
421 		goto err;
422 	}
423 
424 	dev_dbg(radio->dev, "%s: %dkHz\n", __func__, freq);
425 
426 	core->write(core, WL1273_INT_MASK_SET, radio->irq_flags);
427 
428 	if (radio->band == WL1273_BAND_JAPAN)
429 		f = (freq - WL1273_BAND_JAPAN_LOW) / 50;
430 	else
431 		f = (freq - WL1273_BAND_OTHER_LOW) / 50;
432 
433 	r = core->write(core, WL1273_FREQ_SET, f);
434 	if (r) {
435 		dev_err(radio->dev, "FREQ_SET fails\n");
436 		goto err;
437 	}
438 
439 	r = core->write(core, WL1273_TUNER_MODE_SET, TUNER_MODE_PRESET);
440 	if (r) {
441 		dev_err(radio->dev, "TUNER_MODE_SET fails\n");
442 		goto err;
443 	}
444 
445 	reinit_completion(&radio->busy);
446 
447 	t = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(2000));
448 	if (!t) {
449 		dev_err(radio->dev, "%s: TIMEOUT\n", __func__);
450 		return -ETIMEDOUT;
451 	}
452 
453 	radio->rd_index = 0;
454 	radio->wr_index = 0;
455 	radio->rx_frequency = freq;
456 	return 0;
457 err:
458 	return r;
459 }
460 
461 static int wl1273_fm_get_freq(struct wl1273_device *radio)
462 {
463 	struct wl1273_core *core = radio->core;
464 	unsigned int freq;
465 	u16 f;
466 	int r;
467 
468 	if (core->mode == WL1273_MODE_RX) {
469 		r = core->read(core, WL1273_FREQ_SET, &f);
470 		if (r)
471 			return r;
472 
473 		dev_dbg(radio->dev, "Freq get: 0x%04x\n", f);
474 		if (radio->band == WL1273_BAND_JAPAN)
475 			freq = WL1273_BAND_JAPAN_LOW + 50 * f;
476 		else
477 			freq = WL1273_BAND_OTHER_LOW + 50 * f;
478 	} else {
479 		r = core->read(core, WL1273_CHANL_SET, &f);
480 		if (r)
481 			return r;
482 
483 		freq = f * 10;
484 	}
485 
486 	return freq;
487 }
488 
489 /**
490  * wl1273_fm_upload_firmware_patch() -	Upload the firmware.
491  * @radio:				A pointer to the device struct.
492  *
493  * The firmware file consists of arrays of bytes where the first byte
494  * gives the array length. The first byte in the file gives the
495  * number of these arrays.
496  */
497 static int wl1273_fm_upload_firmware_patch(struct wl1273_device *radio)
498 {
499 	struct wl1273_core *core = radio->core;
500 	unsigned int packet_num;
501 	const struct firmware *fw_p;
502 	const char *fw_name = "radio-wl1273-fw.bin";
503 	struct device *dev = radio->dev;
504 	__u8 *ptr;
505 	int r;
506 
507 	dev_dbg(dev, "%s:\n", __func__);
508 
509 	/*
510 	 * Uploading the firmware patch is not always necessary,
511 	 * so we only print an info message.
512 	 */
513 	if (request_firmware(&fw_p, fw_name, dev)) {
514 		dev_info(dev, "%s - %s not found\n", __func__, fw_name);
515 
516 		return 0;
517 	}
518 
519 	ptr = (__u8 *) fw_p->data;
520 	packet_num = ptr[0];
521 	dev_dbg(dev, "%s: packets: %d\n", __func__, packet_num);
522 
523 	r = wl1273_fm_write_fw(core, ptr + 1, packet_num);
524 	if (r) {
525 		dev_err(dev, "FW upload error: %d\n", r);
526 		goto out;
527 	}
528 
529 	/* ignore possible error here */
530 	core->write(core, WL1273_RESET, 0);
531 
532 	dev_dbg(dev, "%s - download OK, r: %d\n", __func__, r);
533 out:
534 	release_firmware(fw_p);
535 	return r;
536 }
537 
538 static int wl1273_fm_stop(struct wl1273_device *radio)
539 {
540 	struct wl1273_core *core = radio->core;
541 
542 	if (core->mode == WL1273_MODE_RX) {
543 		int r = core->write(core, WL1273_POWER_SET,
544 				    WL1273_POWER_SET_OFF);
545 		if (r)
546 			dev_err(radio->dev, "%s: POWER_SET fails: %d\n",
547 				__func__, r);
548 	} else if (core->mode == WL1273_MODE_TX) {
549 		int r = core->write(core, WL1273_PUPD_SET,
550 				    WL1273_PUPD_SET_OFF);
551 		if (r)
552 			dev_err(radio->dev,
553 				"%s: PUPD_SET fails: %d\n", __func__, r);
554 	}
555 
556 	if (core->pdata->disable) {
557 		core->pdata->disable();
558 		dev_dbg(radio->dev, "Back to reset\n");
559 	}
560 
561 	return 0;
562 }
563 
564 static int wl1273_fm_start(struct wl1273_device *radio, int new_mode)
565 {
566 	struct wl1273_core *core = radio->core;
567 	struct wl1273_fm_platform_data *pdata = core->pdata;
568 	struct device *dev = radio->dev;
569 	int r = -EINVAL;
570 
571 	if (pdata->enable && core->mode == WL1273_MODE_OFF) {
572 		dev_dbg(radio->dev, "Out of reset\n");
573 
574 		pdata->enable();
575 		msleep(250);
576 	}
577 
578 	if (new_mode == WL1273_MODE_RX) {
579 		u16 val = WL1273_POWER_SET_FM;
580 
581 		if (radio->rds_on)
582 			val |= WL1273_POWER_SET_RDS;
583 
584 		/* If this fails try again */
585 		r = core->write(core, WL1273_POWER_SET, val);
586 		if (r) {
587 			msleep(100);
588 
589 			r = core->write(core, WL1273_POWER_SET, val);
590 			if (r) {
591 				dev_err(dev, "%s: POWER_SET fails\n", __func__);
592 				goto fail;
593 			}
594 		}
595 
596 		/* rds buffer configuration */
597 		radio->wr_index = 0;
598 		radio->rd_index = 0;
599 
600 	} else if (new_mode == WL1273_MODE_TX) {
601 		/* If this fails try again once */
602 		r = core->write(core, WL1273_PUPD_SET, WL1273_PUPD_SET_ON);
603 		if (r) {
604 			msleep(100);
605 			r = core->write(core, WL1273_PUPD_SET,
606 					WL1273_PUPD_SET_ON);
607 			if (r) {
608 				dev_err(dev, "%s: PUPD_SET fails\n", __func__);
609 				goto fail;
610 			}
611 		}
612 
613 		if (radio->rds_on) {
614 			r = core->write(core, WL1273_RDS_DATA_ENB, 1);
615 			if (r) {
616 				dev_err(dev, "%s: RDS_DATA_ENB ON fails\n",
617 					__func__);
618 				goto fail;
619 			}
620 		} else {
621 			r = core->write(core, WL1273_RDS_DATA_ENB, 0);
622 			if (r) {
623 				dev_err(dev, "%s: RDS_DATA_ENB OFF fails\n",
624 					__func__);
625 				goto fail;
626 			}
627 		}
628 	} else {
629 		dev_warn(dev, "%s: Illegal mode.\n", __func__);
630 	}
631 
632 	if (core->mode == WL1273_MODE_OFF) {
633 		r = wl1273_fm_upload_firmware_patch(radio);
634 		if (r)
635 			dev_warn(dev, "Firmware upload failed.\n");
636 
637 		/*
638 		 * Sometimes the chip is in a wrong power state at this point.
639 		 * So we set the power once again.
640 		 */
641 		if (new_mode == WL1273_MODE_RX) {
642 			u16 val = WL1273_POWER_SET_FM;
643 
644 			if (radio->rds_on)
645 				val |= WL1273_POWER_SET_RDS;
646 
647 			r = core->write(core, WL1273_POWER_SET, val);
648 			if (r) {
649 				dev_err(dev, "%s: POWER_SET fails\n", __func__);
650 				goto fail;
651 			}
652 		} else if (new_mode == WL1273_MODE_TX) {
653 			r = core->write(core, WL1273_PUPD_SET,
654 					WL1273_PUPD_SET_ON);
655 			if (r) {
656 				dev_err(dev, "%s: PUPD_SET fails\n", __func__);
657 				goto fail;
658 			}
659 		}
660 	}
661 
662 	return 0;
663 fail:
664 	if (pdata->disable)
665 		pdata->disable();
666 
667 	dev_dbg(dev, "%s: return: %d\n", __func__, r);
668 	return r;
669 }
670 
671 static int wl1273_fm_suspend(struct wl1273_device *radio)
672 {
673 	struct wl1273_core *core = radio->core;
674 	int r = 0;
675 
676 	/* Cannot go from OFF to SUSPENDED */
677 	if (core->mode == WL1273_MODE_RX)
678 		r = core->write(core, WL1273_POWER_SET,
679 				WL1273_POWER_SET_RETENTION);
680 	else if (core->mode == WL1273_MODE_TX)
681 		r = core->write(core, WL1273_PUPD_SET,
682 				WL1273_PUPD_SET_RETENTION);
683 	else
684 		r = -EINVAL;
685 
686 	if (r) {
687 		dev_err(radio->dev, "%s: POWER_SET fails: %d\n", __func__, r);
688 		goto out;
689 	}
690 
691 out:
692 	return r;
693 }
694 
695 static int wl1273_fm_set_mode(struct wl1273_device *radio, int mode)
696 {
697 	struct wl1273_core *core = radio->core;
698 	struct device *dev = radio->dev;
699 	int old_mode;
700 	int r;
701 
702 	dev_dbg(dev, "%s\n", __func__);
703 	dev_dbg(dev, "Forbidden modes: 0x%02x\n", radio->forbidden);
704 
705 	old_mode = core->mode;
706 	if (mode & radio->forbidden) {
707 		r = -EPERM;
708 		goto out;
709 	}
710 
711 	switch (mode) {
712 	case WL1273_MODE_RX:
713 	case WL1273_MODE_TX:
714 		r = wl1273_fm_start(radio, mode);
715 		if (r) {
716 			dev_err(dev, "%s: Cannot start.\n", __func__);
717 			wl1273_fm_stop(radio);
718 			goto out;
719 		}
720 
721 		core->mode = mode;
722 		r = core->write(core, WL1273_INT_MASK_SET, radio->irq_flags);
723 		if (r) {
724 			dev_err(dev, "INT_MASK_SET fails.\n");
725 			goto out;
726 		}
727 
728 		/* remember previous settings */
729 		if (mode == WL1273_MODE_RX) {
730 			r = wl1273_fm_set_rx_freq(radio, radio->rx_frequency);
731 			if (r) {
732 				dev_err(dev, "set freq fails: %d.\n", r);
733 				goto out;
734 			}
735 
736 			r = core->set_volume(core, core->volume);
737 			if (r) {
738 				dev_err(dev, "set volume fails: %d.\n", r);
739 				goto out;
740 			}
741 
742 			dev_dbg(dev, "%s: Set vol: %d.\n", __func__,
743 				core->volume);
744 		} else {
745 			r = wl1273_fm_set_tx_freq(radio, radio->tx_frequency);
746 			if (r) {
747 				dev_err(dev, "set freq fails: %d.\n", r);
748 				goto out;
749 			}
750 		}
751 
752 		dev_dbg(radio->dev, "%s: Set audio mode.\n", __func__);
753 
754 		r = core->set_audio(core, core->audio_mode);
755 		if (r)
756 			dev_err(dev, "Cannot set audio mode.\n");
757 		break;
758 
759 	case WL1273_MODE_OFF:
760 		r = wl1273_fm_stop(radio);
761 		if (r)
762 			dev_err(dev, "%s: Off fails: %d\n", __func__, r);
763 		else
764 			core->mode = WL1273_MODE_OFF;
765 
766 		break;
767 
768 	case WL1273_MODE_SUSPENDED:
769 		r = wl1273_fm_suspend(radio);
770 		if (r)
771 			dev_err(dev, "%s: Suspend fails: %d\n", __func__, r);
772 		else
773 			core->mode = WL1273_MODE_SUSPENDED;
774 
775 		break;
776 
777 	default:
778 		dev_err(dev, "%s: Unknown mode: %d\n", __func__, mode);
779 		r = -EINVAL;
780 		break;
781 	}
782 out:
783 	if (r)
784 		core->mode = old_mode;
785 
786 	return r;
787 }
788 
789 static int wl1273_fm_set_seek(struct wl1273_device *radio,
790 			      unsigned int wrap_around,
791 			      unsigned int seek_upward,
792 			      int level)
793 {
794 	struct wl1273_core *core = radio->core;
795 	int r = 0;
796 	unsigned int dir = (seek_upward == 0) ? 0 : 1;
797 	unsigned int f;
798 
799 	f = radio->rx_frequency;
800 	dev_dbg(radio->dev, "rx_frequency: %d\n", f);
801 
802 	if (dir && f + radio->spacing <= radio->rangehigh)
803 		r = wl1273_fm_set_rx_freq(radio, f + radio->spacing);
804 	else if (dir && wrap_around)
805 		r = wl1273_fm_set_rx_freq(radio, radio->rangelow);
806 	else if (f - radio->spacing >= radio->rangelow)
807 		r = wl1273_fm_set_rx_freq(radio, f - radio->spacing);
808 	else if (wrap_around)
809 		r = wl1273_fm_set_rx_freq(radio, radio->rangehigh);
810 
811 	if (r)
812 		goto out;
813 
814 	if (level < SCHAR_MIN || level > SCHAR_MAX)
815 		return -EINVAL;
816 
817 	reinit_completion(&radio->busy);
818 	dev_dbg(radio->dev, "%s: BUSY\n", __func__);
819 
820 	r = core->write(core, WL1273_INT_MASK_SET, radio->irq_flags);
821 	if (r)
822 		goto out;
823 
824 	dev_dbg(radio->dev, "%s\n", __func__);
825 
826 	r = core->write(core, WL1273_SEARCH_LVL_SET, level);
827 	if (r)
828 		goto out;
829 
830 	r = core->write(core, WL1273_SEARCH_DIR_SET, dir);
831 	if (r)
832 		goto out;
833 
834 	r = core->write(core, WL1273_TUNER_MODE_SET, TUNER_MODE_AUTO_SEEK);
835 	if (r)
836 		goto out;
837 
838 	/* wait for the FR IRQ */
839 	wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(1000));
840 	if (!(radio->irq_received & WL1273_BL_EVENT)) {
841 		r = -ETIMEDOUT;
842 		goto out;
843 	}
844 
845 	radio->irq_received &= ~WL1273_BL_EVENT;
846 
847 	if (!wrap_around)
848 		goto out;
849 
850 	/* Wrap around */
851 	dev_dbg(radio->dev, "Wrap around in HW seek.\n");
852 
853 	if (seek_upward)
854 		f = radio->rangelow;
855 	else
856 		f = radio->rangehigh;
857 
858 	r = wl1273_fm_set_rx_freq(radio, f);
859 	if (r)
860 		goto out;
861 
862 	reinit_completion(&radio->busy);
863 	dev_dbg(radio->dev, "%s: BUSY\n", __func__);
864 
865 	r = core->write(core, WL1273_TUNER_MODE_SET, TUNER_MODE_AUTO_SEEK);
866 	if (r)
867 		goto out;
868 
869 	/* wait for the FR IRQ */
870 	if (!wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(1000)))
871 		r = -ETIMEDOUT;
872 out:
873 	dev_dbg(radio->dev, "%s: Err: %d\n", __func__, r);
874 	return r;
875 }
876 
877 /**
878  * wl1273_fm_get_tx_ctune() -	Get the TX tuning capacitor value.
879  * @radio:			A pointer to the device struct.
880  */
881 static unsigned int wl1273_fm_get_tx_ctune(struct wl1273_device *radio)
882 {
883 	struct wl1273_core *core = radio->core;
884 	struct device *dev = radio->dev;
885 	u16 val;
886 	int r;
887 
888 	if (core->mode == WL1273_MODE_OFF ||
889 	    core->mode == WL1273_MODE_SUSPENDED)
890 		return -EPERM;
891 
892 	r = core->read(core, WL1273_READ_FMANT_TUNE_VALUE, &val);
893 	if (r) {
894 		dev_err(dev, "%s: read error: %d\n", __func__, r);
895 		goto out;
896 	}
897 
898 out:
899 	return val;
900 }
901 
902 /**
903  * wl1273_fm_set_preemphasis() - Set the TX pre-emphasis value.
904  * @radio:			 A pointer to the device struct.
905  * @preemphasis:		 The new pre-amphasis value.
906  *
907  * Possible pre-emphasis values are: V4L2_PREEMPHASIS_DISABLED,
908  * V4L2_PREEMPHASIS_50_uS and V4L2_PREEMPHASIS_75_uS.
909  */
910 static int wl1273_fm_set_preemphasis(struct wl1273_device *radio,
911 				     unsigned int preemphasis)
912 {
913 	struct wl1273_core *core = radio->core;
914 	int r;
915 	u16 em;
916 
917 	if (core->mode == WL1273_MODE_OFF ||
918 	    core->mode == WL1273_MODE_SUSPENDED)
919 		return -EPERM;
920 
921 	mutex_lock(&core->lock);
922 
923 	switch (preemphasis) {
924 	case V4L2_PREEMPHASIS_DISABLED:
925 		em = 1;
926 		break;
927 	case V4L2_PREEMPHASIS_50_uS:
928 		em = 0;
929 		break;
930 	case V4L2_PREEMPHASIS_75_uS:
931 		em = 2;
932 		break;
933 	default:
934 		r = -EINVAL;
935 		goto out;
936 	}
937 
938 	r = core->write(core, WL1273_PREMPH_SET, em);
939 	if (r)
940 		goto out;
941 
942 	radio->preemphasis = preemphasis;
943 
944 out:
945 	mutex_unlock(&core->lock);
946 	return r;
947 }
948 
949 static int wl1273_fm_rds_on(struct wl1273_device *radio)
950 {
951 	struct wl1273_core *core = radio->core;
952 	int r;
953 
954 	dev_dbg(radio->dev, "%s\n", __func__);
955 	if (radio->rds_on)
956 		return 0;
957 
958 	r = core->write(core, WL1273_POWER_SET,
959 			WL1273_POWER_SET_FM | WL1273_POWER_SET_RDS);
960 	if (r)
961 		goto out;
962 
963 	r = wl1273_fm_set_rx_freq(radio, radio->rx_frequency);
964 	if (r)
965 		dev_err(radio->dev, "set freq fails: %d.\n", r);
966 out:
967 	return r;
968 }
969 
970 static int wl1273_fm_rds_off(struct wl1273_device *radio)
971 {
972 	struct wl1273_core *core = radio->core;
973 	int r;
974 
975 	if (!radio->rds_on)
976 		return 0;
977 
978 	radio->irq_flags &= ~WL1273_RDS_EVENT;
979 
980 	r = core->write(core, WL1273_INT_MASK_SET, radio->irq_flags);
981 	if (r)
982 		goto out;
983 
984 	/* Service pending read */
985 	wake_up_interruptible(&radio->read_queue);
986 
987 	dev_dbg(radio->dev, "%s\n", __func__);
988 
989 	r = core->write(core, WL1273_POWER_SET, WL1273_POWER_SET_FM);
990 	if (r)
991 		goto out;
992 
993 	r = wl1273_fm_set_rx_freq(radio, radio->rx_frequency);
994 	if (r)
995 		dev_err(radio->dev, "set freq fails: %d.\n", r);
996 out:
997 	dev_dbg(radio->dev, "%s: exiting...\n", __func__);
998 
999 	return r;
1000 }
1001 
1002 static int wl1273_fm_set_rds(struct wl1273_device *radio, unsigned int new_mode)
1003 {
1004 	int r = 0;
1005 	struct wl1273_core *core = radio->core;
1006 
1007 	if (core->mode == WL1273_MODE_OFF ||
1008 	    core->mode == WL1273_MODE_SUSPENDED)
1009 		return -EPERM;
1010 
1011 	if (new_mode == WL1273_RDS_RESET) {
1012 		r = core->write(core, WL1273_RDS_CNTRL_SET, 1);
1013 		return r;
1014 	}
1015 
1016 	if (core->mode == WL1273_MODE_TX && new_mode == WL1273_RDS_OFF) {
1017 		r = core->write(core, WL1273_RDS_DATA_ENB, 0);
1018 	} else if (core->mode == WL1273_MODE_TX && new_mode == WL1273_RDS_ON) {
1019 		r = core->write(core, WL1273_RDS_DATA_ENB, 1);
1020 	} else if (core->mode == WL1273_MODE_RX && new_mode == WL1273_RDS_OFF) {
1021 		r = wl1273_fm_rds_off(radio);
1022 	} else if (core->mode == WL1273_MODE_RX && new_mode == WL1273_RDS_ON) {
1023 		r = wl1273_fm_rds_on(radio);
1024 	} else {
1025 		dev_err(radio->dev, "%s: Unknown mode: %d\n",
1026 			__func__, new_mode);
1027 		r = -EINVAL;
1028 	}
1029 
1030 	if (!r)
1031 		radio->rds_on = (new_mode == WL1273_RDS_ON) ? true : false;
1032 
1033 	return r;
1034 }
1035 
1036 static ssize_t wl1273_fm_fops_write(struct file *file, const char __user *buf,
1037 				    size_t count, loff_t *ppos)
1038 {
1039 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1040 	struct wl1273_core *core = radio->core;
1041 	u16 val;
1042 	int r;
1043 
1044 	dev_dbg(radio->dev, "%s\n", __func__);
1045 
1046 	if (core->mode != WL1273_MODE_TX)
1047 		return count;
1048 
1049 	if (radio->rds_users == 0) {
1050 		dev_warn(radio->dev, "%s: RDS not on.\n", __func__);
1051 		return 0;
1052 	}
1053 
1054 	if (mutex_lock_interruptible(&core->lock))
1055 		return -EINTR;
1056 	/*
1057 	 * Multiple processes can open the device, but only
1058 	 * one gets to write to it.
1059 	 */
1060 	if (radio->owner && radio->owner != file) {
1061 		r = -EBUSY;
1062 		goto out;
1063 	}
1064 	radio->owner = file;
1065 
1066 	/* Manual Mode */
1067 	if (count > 255)
1068 		val = 255;
1069 	else
1070 		val = count;
1071 
1072 	core->write(core, WL1273_RDS_CONFIG_DATA_SET, val);
1073 
1074 	if (copy_from_user(radio->write_buf + 1, buf, val)) {
1075 		r = -EFAULT;
1076 		goto out;
1077 	}
1078 
1079 	dev_dbg(radio->dev, "Count: %d\n", val);
1080 	dev_dbg(radio->dev, "From user: \"%s\"\n", radio->write_buf);
1081 
1082 	radio->write_buf[0] = WL1273_RDS_DATA_SET;
1083 	core->write_data(core, radio->write_buf, val + 1);
1084 
1085 	r = val;
1086 out:
1087 	mutex_unlock(&core->lock);
1088 
1089 	return r;
1090 }
1091 
1092 static unsigned int wl1273_fm_fops_poll(struct file *file,
1093 					struct poll_table_struct *pts)
1094 {
1095 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1096 	struct wl1273_core *core = radio->core;
1097 
1098 	if (radio->owner && radio->owner != file)
1099 		return -EBUSY;
1100 
1101 	radio->owner = file;
1102 
1103 	if (core->mode == WL1273_MODE_RX) {
1104 		poll_wait(file, &radio->read_queue, pts);
1105 
1106 		if (radio->rd_index != radio->wr_index)
1107 			return POLLIN | POLLRDNORM;
1108 
1109 	} else if (core->mode == WL1273_MODE_TX) {
1110 		return POLLOUT | POLLWRNORM;
1111 	}
1112 
1113 	return 0;
1114 }
1115 
1116 static int wl1273_fm_fops_open(struct file *file)
1117 {
1118 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1119 	struct wl1273_core *core = radio->core;
1120 	int r = 0;
1121 
1122 	dev_dbg(radio->dev, "%s\n", __func__);
1123 
1124 	if (core->mode == WL1273_MODE_RX && radio->rds_on &&
1125 	    !radio->rds_users) {
1126 		dev_dbg(radio->dev, "%s: Mode: %d\n", __func__, core->mode);
1127 
1128 		if (mutex_lock_interruptible(&core->lock))
1129 			return -EINTR;
1130 
1131 		radio->irq_flags |= WL1273_RDS_EVENT;
1132 
1133 		r = core->write(core, WL1273_INT_MASK_SET,
1134 				radio->irq_flags);
1135 		if (r) {
1136 			mutex_unlock(&core->lock);
1137 			goto out;
1138 		}
1139 
1140 		radio->rds_users++;
1141 
1142 		mutex_unlock(&core->lock);
1143 	}
1144 out:
1145 	return r;
1146 }
1147 
1148 static int wl1273_fm_fops_release(struct file *file)
1149 {
1150 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1151 	struct wl1273_core *core = radio->core;
1152 	int r = 0;
1153 
1154 	dev_dbg(radio->dev, "%s\n", __func__);
1155 
1156 	if (radio->rds_users > 0) {
1157 		radio->rds_users--;
1158 		if (radio->rds_users == 0) {
1159 			if (mutex_lock_interruptible(&core->lock))
1160 				return -EINTR;
1161 
1162 			radio->irq_flags &= ~WL1273_RDS_EVENT;
1163 
1164 			if (core->mode == WL1273_MODE_RX) {
1165 				r = core->write(core,
1166 						WL1273_INT_MASK_SET,
1167 						radio->irq_flags);
1168 				if (r) {
1169 					mutex_unlock(&core->lock);
1170 					goto out;
1171 				}
1172 			}
1173 			mutex_unlock(&core->lock);
1174 		}
1175 	}
1176 
1177 	if (file == radio->owner)
1178 		radio->owner = NULL;
1179 out:
1180 	return r;
1181 }
1182 
1183 static ssize_t wl1273_fm_fops_read(struct file *file, char __user *buf,
1184 				   size_t count, loff_t *ppos)
1185 {
1186 	int r = 0;
1187 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1188 	struct wl1273_core *core = radio->core;
1189 	unsigned int block_count = 0;
1190 	u16 val;
1191 
1192 	dev_dbg(radio->dev, "%s\n", __func__);
1193 
1194 	if (core->mode != WL1273_MODE_RX)
1195 		return 0;
1196 
1197 	if (radio->rds_users == 0) {
1198 		dev_warn(radio->dev, "%s: RDS not on.\n", __func__);
1199 		return 0;
1200 	}
1201 
1202 	if (mutex_lock_interruptible(&core->lock))
1203 		return -EINTR;
1204 
1205 	/*
1206 	 * Multiple processes can open the device, but only
1207 	 * one at a time gets read access.
1208 	 */
1209 	if (radio->owner && radio->owner != file) {
1210 		r = -EBUSY;
1211 		goto out;
1212 	}
1213 	radio->owner = file;
1214 
1215 	r = core->read(core, WL1273_RDS_SYNC_GET, &val);
1216 	if (r) {
1217 		dev_err(radio->dev, "%s: Get RDS_SYNC fails.\n", __func__);
1218 		goto out;
1219 	} else if (val == 0) {
1220 		dev_info(radio->dev, "RDS_SYNC: Not synchronized\n");
1221 		r = -ENODATA;
1222 		goto out;
1223 	}
1224 
1225 	/* block if no new data available */
1226 	while (radio->wr_index == radio->rd_index) {
1227 		if (file->f_flags & O_NONBLOCK) {
1228 			r = -EWOULDBLOCK;
1229 			goto out;
1230 		}
1231 
1232 		dev_dbg(radio->dev, "%s: Wait for RDS data.\n", __func__);
1233 		if (wait_event_interruptible(radio->read_queue,
1234 					     radio->wr_index !=
1235 					     radio->rd_index) < 0) {
1236 			r = -EINTR;
1237 			goto out;
1238 		}
1239 	}
1240 
1241 	/* calculate block count from byte count */
1242 	count /= RDS_BLOCK_SIZE;
1243 
1244 	/* copy RDS blocks from the internal buffer and to user buffer */
1245 	while (block_count < count) {
1246 		if (radio->rd_index == radio->wr_index)
1247 			break;
1248 
1249 		/* always transfer complete RDS blocks */
1250 		if (copy_to_user(buf, &radio->buffer[radio->rd_index],
1251 				 RDS_BLOCK_SIZE))
1252 			break;
1253 
1254 		/* increment and wrap the read pointer */
1255 		radio->rd_index += RDS_BLOCK_SIZE;
1256 		if (radio->rd_index >= radio->buf_size)
1257 			radio->rd_index = 0;
1258 
1259 		/* increment counters */
1260 		block_count++;
1261 		buf += RDS_BLOCK_SIZE;
1262 		r += RDS_BLOCK_SIZE;
1263 	}
1264 
1265 out:
1266 	dev_dbg(radio->dev, "%s: exit\n", __func__);
1267 	mutex_unlock(&core->lock);
1268 
1269 	return r;
1270 }
1271 
1272 static const struct v4l2_file_operations wl1273_fops = {
1273 	.owner		= THIS_MODULE,
1274 	.read		= wl1273_fm_fops_read,
1275 	.write		= wl1273_fm_fops_write,
1276 	.poll		= wl1273_fm_fops_poll,
1277 	.unlocked_ioctl	= video_ioctl2,
1278 	.open		= wl1273_fm_fops_open,
1279 	.release	= wl1273_fm_fops_release,
1280 };
1281 
1282 static int wl1273_fm_vidioc_querycap(struct file *file, void *priv,
1283 				     struct v4l2_capability *capability)
1284 {
1285 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1286 
1287 	dev_dbg(radio->dev, "%s\n", __func__);
1288 
1289 	strlcpy(capability->driver, WL1273_FM_DRIVER_NAME,
1290 		sizeof(capability->driver));
1291 	strlcpy(capability->card, "Texas Instruments Wl1273 FM Radio",
1292 		sizeof(capability->card));
1293 	strlcpy(capability->bus_info, radio->bus_type,
1294 		sizeof(capability->bus_info));
1295 
1296 	capability->device_caps = V4L2_CAP_HW_FREQ_SEEK |
1297 		V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_AUDIO |
1298 		V4L2_CAP_RDS_CAPTURE | V4L2_CAP_MODULATOR |
1299 		V4L2_CAP_RDS_OUTPUT;
1300 	capability->capabilities = capability->device_caps |
1301 		V4L2_CAP_DEVICE_CAPS;
1302 
1303 	return 0;
1304 }
1305 
1306 static int wl1273_fm_vidioc_g_input(struct file *file, void *priv,
1307 				    unsigned int *i)
1308 {
1309 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1310 
1311 	dev_dbg(radio->dev, "%s\n", __func__);
1312 
1313 	*i = 0;
1314 
1315 	return 0;
1316 }
1317 
1318 static int wl1273_fm_vidioc_s_input(struct file *file, void *priv,
1319 				    unsigned int i)
1320 {
1321 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1322 
1323 	dev_dbg(radio->dev, "%s\n", __func__);
1324 
1325 	if (i != 0)
1326 		return -EINVAL;
1327 
1328 	return 0;
1329 }
1330 
1331 /**
1332  * wl1273_fm_set_tx_power() -	Set the transmission power value.
1333  * @core:			A pointer to the device struct.
1334  * @power:			The new power value.
1335  */
1336 static int wl1273_fm_set_tx_power(struct wl1273_device *radio, u16 power)
1337 {
1338 	struct wl1273_core *core = radio->core;
1339 	int r;
1340 
1341 	if (core->mode == WL1273_MODE_OFF ||
1342 	    core->mode == WL1273_MODE_SUSPENDED)
1343 		return -EPERM;
1344 
1345 	mutex_lock(&core->lock);
1346 
1347 	/* Convert the dBuV value to chip presentation */
1348 	r = core->write(core, WL1273_POWER_LEV_SET, 122 - power);
1349 	if (r)
1350 		goto out;
1351 
1352 	radio->tx_power = power;
1353 
1354 out:
1355 	mutex_unlock(&core->lock);
1356 	return r;
1357 }
1358 
1359 #define WL1273_SPACING_50kHz	1
1360 #define WL1273_SPACING_100kHz	2
1361 #define WL1273_SPACING_200kHz	4
1362 
1363 static int wl1273_fm_tx_set_spacing(struct wl1273_device *radio,
1364 				    unsigned int spacing)
1365 {
1366 	struct wl1273_core *core = radio->core;
1367 	int r;
1368 
1369 	if (spacing == 0) {
1370 		r = core->write(core, WL1273_SCAN_SPACING_SET,
1371 				WL1273_SPACING_100kHz);
1372 		radio->spacing = 100;
1373 	} else if (spacing - 50000 < 25000) {
1374 		r = core->write(core, WL1273_SCAN_SPACING_SET,
1375 				WL1273_SPACING_50kHz);
1376 		radio->spacing = 50;
1377 	} else if (spacing - 100000 < 50000) {
1378 		r = core->write(core, WL1273_SCAN_SPACING_SET,
1379 				WL1273_SPACING_100kHz);
1380 		radio->spacing = 100;
1381 	} else {
1382 		r = core->write(core, WL1273_SCAN_SPACING_SET,
1383 				WL1273_SPACING_200kHz);
1384 		radio->spacing = 200;
1385 	}
1386 
1387 	return r;
1388 }
1389 
1390 static int wl1273_fm_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
1391 {
1392 	struct wl1273_device *radio = ctrl->priv;
1393 	struct wl1273_core *core = radio->core;
1394 
1395 	dev_dbg(radio->dev, "%s\n", __func__);
1396 
1397 	if (mutex_lock_interruptible(&core->lock))
1398 		return -EINTR;
1399 
1400 	switch (ctrl->id) {
1401 	case  V4L2_CID_TUNE_ANTENNA_CAPACITOR:
1402 		ctrl->val = wl1273_fm_get_tx_ctune(radio);
1403 		break;
1404 
1405 	default:
1406 		dev_warn(radio->dev, "%s: Unknown IOCTL: %d\n",
1407 			 __func__, ctrl->id);
1408 		break;
1409 	}
1410 
1411 	mutex_unlock(&core->lock);
1412 
1413 	return 0;
1414 }
1415 
1416 #define WL1273_MUTE_SOFT_ENABLE    (1 << 0)
1417 #define WL1273_MUTE_AC             (1 << 1)
1418 #define WL1273_MUTE_HARD_LEFT      (1 << 2)
1419 #define WL1273_MUTE_HARD_RIGHT     (1 << 3)
1420 #define WL1273_MUTE_SOFT_FORCE     (1 << 4)
1421 
1422 static inline struct wl1273_device *to_radio(struct v4l2_ctrl *ctrl)
1423 {
1424 	return container_of(ctrl->handler, struct wl1273_device, ctrl_handler);
1425 }
1426 
1427 static int wl1273_fm_vidioc_s_ctrl(struct v4l2_ctrl *ctrl)
1428 {
1429 	struct wl1273_device *radio = to_radio(ctrl);
1430 	struct wl1273_core *core = radio->core;
1431 	int r = 0;
1432 
1433 	dev_dbg(radio->dev, "%s\n", __func__);
1434 
1435 	switch (ctrl->id) {
1436 	case V4L2_CID_AUDIO_MUTE:
1437 		if (mutex_lock_interruptible(&core->lock))
1438 			return -EINTR;
1439 
1440 		if (core->mode == WL1273_MODE_RX && ctrl->val)
1441 			r = core->write(core,
1442 					WL1273_MUTE_STATUS_SET,
1443 					WL1273_MUTE_HARD_LEFT |
1444 					WL1273_MUTE_HARD_RIGHT);
1445 		else if (core->mode == WL1273_MODE_RX)
1446 			r = core->write(core,
1447 					WL1273_MUTE_STATUS_SET, 0x0);
1448 		else if (core->mode == WL1273_MODE_TX && ctrl->val)
1449 			r = core->write(core, WL1273_MUTE, 1);
1450 		else if (core->mode == WL1273_MODE_TX)
1451 			r = core->write(core, WL1273_MUTE, 0);
1452 
1453 		mutex_unlock(&core->lock);
1454 		break;
1455 
1456 	case V4L2_CID_AUDIO_VOLUME:
1457 		if (ctrl->val == 0)
1458 			r = wl1273_fm_set_mode(radio, WL1273_MODE_OFF);
1459 		else
1460 			r =  core->set_volume(core, core->volume);
1461 		break;
1462 
1463 	case V4L2_CID_TUNE_PREEMPHASIS:
1464 		r = wl1273_fm_set_preemphasis(radio, ctrl->val);
1465 		break;
1466 
1467 	case V4L2_CID_TUNE_POWER_LEVEL:
1468 		r = wl1273_fm_set_tx_power(radio, ctrl->val);
1469 		break;
1470 
1471 	default:
1472 		dev_warn(radio->dev, "%s: Unknown IOCTL: %d\n",
1473 			 __func__, ctrl->id);
1474 		break;
1475 	}
1476 
1477 	dev_dbg(radio->dev, "%s\n", __func__);
1478 	return r;
1479 }
1480 
1481 static int wl1273_fm_vidioc_g_audio(struct file *file, void *priv,
1482 				    struct v4l2_audio *audio)
1483 {
1484 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1485 
1486 	dev_dbg(radio->dev, "%s\n", __func__);
1487 
1488 	if (audio->index > 1)
1489 		return -EINVAL;
1490 
1491 	strlcpy(audio->name, "Radio", sizeof(audio->name));
1492 	audio->capability = V4L2_AUDCAP_STEREO;
1493 
1494 	return 0;
1495 }
1496 
1497 static int wl1273_fm_vidioc_s_audio(struct file *file, void *priv,
1498 				    const struct v4l2_audio *audio)
1499 {
1500 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1501 
1502 	dev_dbg(radio->dev, "%s\n", __func__);
1503 
1504 	if (audio->index != 0)
1505 		return -EINVAL;
1506 
1507 	return 0;
1508 }
1509 
1510 #define WL1273_RDS_NOT_SYNCHRONIZED 0
1511 #define WL1273_RDS_SYNCHRONIZED 1
1512 
1513 static int wl1273_fm_vidioc_g_tuner(struct file *file, void *priv,
1514 				    struct v4l2_tuner *tuner)
1515 {
1516 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1517 	struct wl1273_core *core = radio->core;
1518 	u16 val;
1519 	int r;
1520 
1521 	dev_dbg(radio->dev, "%s\n", __func__);
1522 
1523 	if (tuner->index > 0)
1524 		return -EINVAL;
1525 
1526 	strlcpy(tuner->name, WL1273_FM_DRIVER_NAME, sizeof(tuner->name));
1527 	tuner->type = V4L2_TUNER_RADIO;
1528 
1529 	tuner->rangelow	= WL1273_FREQ(WL1273_BAND_JAPAN_LOW);
1530 	tuner->rangehigh = WL1273_FREQ(WL1273_BAND_OTHER_HIGH);
1531 
1532 	tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_RDS |
1533 		V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS_BLOCK_IO |
1534 		V4L2_TUNER_CAP_HWSEEK_BOUNDED | V4L2_TUNER_CAP_HWSEEK_WRAP;
1535 
1536 	if (radio->stereo)
1537 		tuner->audmode = V4L2_TUNER_MODE_STEREO;
1538 	else
1539 		tuner->audmode = V4L2_TUNER_MODE_MONO;
1540 
1541 	if (core->mode != WL1273_MODE_RX)
1542 		return 0;
1543 
1544 	if (mutex_lock_interruptible(&core->lock))
1545 		return -EINTR;
1546 
1547 	r = core->read(core, WL1273_STEREO_GET, &val);
1548 	if (r)
1549 		goto out;
1550 
1551 	if (val == 1)
1552 		tuner->rxsubchans = V4L2_TUNER_SUB_STEREO;
1553 	else
1554 		tuner->rxsubchans = V4L2_TUNER_SUB_MONO;
1555 
1556 	r = core->read(core, WL1273_RSSI_LVL_GET, &val);
1557 	if (r)
1558 		goto out;
1559 
1560 	tuner->signal = (s16) val;
1561 	dev_dbg(radio->dev, "Signal: %d\n", tuner->signal);
1562 
1563 	tuner->afc = 0;
1564 
1565 	r = core->read(core, WL1273_RDS_SYNC_GET, &val);
1566 	if (r)
1567 		goto out;
1568 
1569 	if (val == WL1273_RDS_SYNCHRONIZED)
1570 		tuner->rxsubchans |= V4L2_TUNER_SUB_RDS;
1571 out:
1572 	mutex_unlock(&core->lock);
1573 
1574 	return r;
1575 }
1576 
1577 static int wl1273_fm_vidioc_s_tuner(struct file *file, void *priv,
1578 				    const struct v4l2_tuner *tuner)
1579 {
1580 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1581 	struct wl1273_core *core = radio->core;
1582 	int r = 0;
1583 
1584 	dev_dbg(radio->dev, "%s\n", __func__);
1585 	dev_dbg(radio->dev, "tuner->index: %d\n", tuner->index);
1586 	dev_dbg(radio->dev, "tuner->name: %s\n", tuner->name);
1587 	dev_dbg(radio->dev, "tuner->capability: 0x%04x\n", tuner->capability);
1588 	dev_dbg(radio->dev, "tuner->rxsubchans: 0x%04x\n", tuner->rxsubchans);
1589 	dev_dbg(radio->dev, "tuner->rangelow: %d\n", tuner->rangelow);
1590 	dev_dbg(radio->dev, "tuner->rangehigh: %d\n", tuner->rangehigh);
1591 
1592 	if (tuner->index > 0)
1593 		return -EINVAL;
1594 
1595 	if (mutex_lock_interruptible(&core->lock))
1596 		return -EINTR;
1597 
1598 	r = wl1273_fm_set_mode(radio, WL1273_MODE_RX);
1599 	if (r)
1600 		goto out;
1601 
1602 	if (tuner->rxsubchans & V4L2_TUNER_SUB_RDS)
1603 		r = wl1273_fm_set_rds(radio, WL1273_RDS_ON);
1604 	else
1605 		r = wl1273_fm_set_rds(radio, WL1273_RDS_OFF);
1606 
1607 	if (r)
1608 		dev_warn(radio->dev, "%s: RDS fails: %d\n", __func__, r);
1609 
1610 	if (tuner->audmode == V4L2_TUNER_MODE_MONO) {
1611 		r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO);
1612 		if (r < 0) {
1613 			dev_warn(radio->dev, "%s: MOST_MODE fails: %d\n",
1614 				 __func__, r);
1615 			goto out;
1616 		}
1617 		radio->stereo = false;
1618 	} else if (tuner->audmode == V4L2_TUNER_MODE_STEREO) {
1619 		r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO);
1620 		if (r < 0) {
1621 			dev_warn(radio->dev, "%s: MOST_MODE fails: %d\n",
1622 				 __func__, r);
1623 			goto out;
1624 		}
1625 		radio->stereo = true;
1626 	} else {
1627 		dev_err(radio->dev, "%s: tuner->audmode: %d\n",
1628 			 __func__, tuner->audmode);
1629 		r = -EINVAL;
1630 		goto out;
1631 	}
1632 
1633 out:
1634 	mutex_unlock(&core->lock);
1635 
1636 	return r;
1637 }
1638 
1639 static int wl1273_fm_vidioc_g_frequency(struct file *file, void *priv,
1640 					struct v4l2_frequency *freq)
1641 {
1642 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1643 	struct wl1273_core *core = radio->core;
1644 
1645 	dev_dbg(radio->dev, "%s\n", __func__);
1646 
1647 	if (mutex_lock_interruptible(&core->lock))
1648 		return -EINTR;
1649 
1650 	freq->type = V4L2_TUNER_RADIO;
1651 	freq->frequency = WL1273_FREQ(wl1273_fm_get_freq(radio));
1652 
1653 	mutex_unlock(&core->lock);
1654 
1655 	return 0;
1656 }
1657 
1658 static int wl1273_fm_vidioc_s_frequency(struct file *file, void *priv,
1659 					const struct v4l2_frequency *freq)
1660 {
1661 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1662 	struct wl1273_core *core = radio->core;
1663 	int r;
1664 
1665 	dev_dbg(radio->dev, "%s: %d\n", __func__, freq->frequency);
1666 
1667 	if (freq->type != V4L2_TUNER_RADIO) {
1668 		dev_dbg(radio->dev,
1669 			"freq->type != V4L2_TUNER_RADIO: %d\n", freq->type);
1670 		return -EINVAL;
1671 	}
1672 
1673 	if (mutex_lock_interruptible(&core->lock))
1674 		return -EINTR;
1675 
1676 	if (core->mode == WL1273_MODE_RX) {
1677 		dev_dbg(radio->dev, "freq: %d\n", freq->frequency);
1678 
1679 		r = wl1273_fm_set_rx_freq(radio,
1680 					  WL1273_INV_FREQ(freq->frequency));
1681 		if (r)
1682 			dev_warn(radio->dev, WL1273_FM_DRIVER_NAME
1683 				 ": set frequency failed with %d\n", r);
1684 	} else {
1685 		r = wl1273_fm_set_tx_freq(radio,
1686 					  WL1273_INV_FREQ(freq->frequency));
1687 		if (r)
1688 			dev_warn(radio->dev, WL1273_FM_DRIVER_NAME
1689 				 ": set frequency failed with %d\n", r);
1690 	}
1691 
1692 	mutex_unlock(&core->lock);
1693 
1694 	dev_dbg(radio->dev, "wl1273_vidioc_s_frequency: DONE\n");
1695 	return r;
1696 }
1697 
1698 #define WL1273_DEFAULT_SEEK_LEVEL	7
1699 
1700 static int wl1273_fm_vidioc_s_hw_freq_seek(struct file *file, void *priv,
1701 					   const struct v4l2_hw_freq_seek *seek)
1702 {
1703 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1704 	struct wl1273_core *core = radio->core;
1705 	int r;
1706 
1707 	dev_dbg(radio->dev, "%s\n", __func__);
1708 
1709 	if (seek->tuner != 0 || seek->type != V4L2_TUNER_RADIO)
1710 		return -EINVAL;
1711 
1712 	if (file->f_flags & O_NONBLOCK)
1713 		return -EWOULDBLOCK;
1714 
1715 	if (mutex_lock_interruptible(&core->lock))
1716 		return -EINTR;
1717 
1718 	r = wl1273_fm_set_mode(radio, WL1273_MODE_RX);
1719 	if (r)
1720 		goto out;
1721 
1722 	r = wl1273_fm_tx_set_spacing(radio, seek->spacing);
1723 	if (r)
1724 		dev_warn(radio->dev, "HW seek failed: %d\n", r);
1725 
1726 	r = wl1273_fm_set_seek(radio, seek->wrap_around, seek->seek_upward,
1727 			       WL1273_DEFAULT_SEEK_LEVEL);
1728 	if (r)
1729 		dev_warn(radio->dev, "HW seek failed: %d\n", r);
1730 
1731 out:
1732 	mutex_unlock(&core->lock);
1733 	return r;
1734 }
1735 
1736 static int wl1273_fm_vidioc_s_modulator(struct file *file, void *priv,
1737 					const struct v4l2_modulator *modulator)
1738 {
1739 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1740 	struct wl1273_core *core = radio->core;
1741 	int r = 0;
1742 
1743 	dev_dbg(radio->dev, "%s\n", __func__);
1744 
1745 	if (modulator->index > 0)
1746 		return -EINVAL;
1747 
1748 	if (mutex_lock_interruptible(&core->lock))
1749 		return -EINTR;
1750 
1751 	r = wl1273_fm_set_mode(radio, WL1273_MODE_TX);
1752 	if (r)
1753 		goto out;
1754 
1755 	if (modulator->txsubchans & V4L2_TUNER_SUB_RDS)
1756 		r = wl1273_fm_set_rds(radio, WL1273_RDS_ON);
1757 	else
1758 		r = wl1273_fm_set_rds(radio, WL1273_RDS_OFF);
1759 
1760 	if (modulator->txsubchans & V4L2_TUNER_SUB_MONO)
1761 		r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO);
1762 	else
1763 		r = core->write(core, WL1273_MONO_SET,
1764 				WL1273_RX_STEREO);
1765 	if (r < 0)
1766 		dev_warn(radio->dev, WL1273_FM_DRIVER_NAME
1767 			 "MONO_SET fails: %d\n", r);
1768 out:
1769 	mutex_unlock(&core->lock);
1770 
1771 	return r;
1772 }
1773 
1774 static int wl1273_fm_vidioc_g_modulator(struct file *file, void *priv,
1775 					struct v4l2_modulator *modulator)
1776 {
1777 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1778 	struct wl1273_core *core = radio->core;
1779 	u16 val;
1780 	int r;
1781 
1782 	dev_dbg(radio->dev, "%s\n", __func__);
1783 
1784 	strlcpy(modulator->name, WL1273_FM_DRIVER_NAME,
1785 		sizeof(modulator->name));
1786 
1787 	modulator->rangelow = WL1273_FREQ(WL1273_BAND_JAPAN_LOW);
1788 	modulator->rangehigh = WL1273_FREQ(WL1273_BAND_OTHER_HIGH);
1789 
1790 	modulator->capability =  V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_RDS |
1791 		V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS_BLOCK_IO;
1792 
1793 	if (core->mode != WL1273_MODE_TX)
1794 		return 0;
1795 
1796 	if (mutex_lock_interruptible(&core->lock))
1797 		return -EINTR;
1798 
1799 	r = core->read(core, WL1273_MONO_SET, &val);
1800 	if (r)
1801 		goto out;
1802 
1803 	if (val == WL1273_TX_STEREO)
1804 		modulator->txsubchans = V4L2_TUNER_SUB_STEREO;
1805 	else
1806 		modulator->txsubchans = V4L2_TUNER_SUB_MONO;
1807 
1808 	if (radio->rds_on)
1809 		modulator->txsubchans |= V4L2_TUNER_SUB_RDS;
1810 out:
1811 	mutex_unlock(&core->lock);
1812 
1813 	return 0;
1814 }
1815 
1816 static int wl1273_fm_vidioc_log_status(struct file *file, void *priv)
1817 {
1818 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1819 	struct wl1273_core *core = radio->core;
1820 	struct device *dev = radio->dev;
1821 	u16 val;
1822 	int r;
1823 
1824 	dev_info(dev, DRIVER_DESC);
1825 
1826 	if (core->mode == WL1273_MODE_OFF) {
1827 		dev_info(dev, "Mode: Off\n");
1828 		return 0;
1829 	}
1830 
1831 	if (core->mode == WL1273_MODE_SUSPENDED) {
1832 		dev_info(dev, "Mode: Suspended\n");
1833 		return 0;
1834 	}
1835 
1836 	r = core->read(core, WL1273_ASIC_ID_GET, &val);
1837 	if (r)
1838 		dev_err(dev, "%s: Get ASIC_ID fails.\n", __func__);
1839 	else
1840 		dev_info(dev, "ASIC_ID: 0x%04x\n", val);
1841 
1842 	r = core->read(core, WL1273_ASIC_VER_GET, &val);
1843 	if (r)
1844 		dev_err(dev, "%s: Get ASIC_VER fails.\n", __func__);
1845 	else
1846 		dev_info(dev, "ASIC Version: 0x%04x\n", val);
1847 
1848 	r = core->read(core, WL1273_FIRM_VER_GET, &val);
1849 	if (r)
1850 		dev_err(dev, "%s: Get FIRM_VER fails.\n", __func__);
1851 	else
1852 		dev_info(dev, "FW version: %d(0x%04x)\n", val, val);
1853 
1854 	r = core->read(core, WL1273_BAND_SET, &val);
1855 	if (r)
1856 		dev_err(dev, "%s: Get BAND fails.\n", __func__);
1857 	else
1858 		dev_info(dev, "BAND: %d\n", val);
1859 
1860 	if (core->mode == WL1273_MODE_TX) {
1861 		r = core->read(core, WL1273_PUPD_SET, &val);
1862 		if (r)
1863 			dev_err(dev, "%s: Get PUPD fails.\n", __func__);
1864 		else
1865 			dev_info(dev, "PUPD: 0x%04x\n", val);
1866 
1867 		r = core->read(core, WL1273_CHANL_SET, &val);
1868 		if (r)
1869 			dev_err(dev, "%s: Get CHANL fails.\n", __func__);
1870 		else
1871 			dev_info(dev, "Tx frequency: %dkHz\n", val*10);
1872 	} else if (core->mode == WL1273_MODE_RX) {
1873 		int bf = radio->rangelow;
1874 
1875 		r = core->read(core, WL1273_FREQ_SET, &val);
1876 		if (r)
1877 			dev_err(dev, "%s: Get FREQ fails.\n", __func__);
1878 		else
1879 			dev_info(dev, "RX Frequency: %dkHz\n", bf + val*50);
1880 
1881 		r = core->read(core, WL1273_MOST_MODE_SET, &val);
1882 		if (r)
1883 			dev_err(dev, "%s: Get MOST_MODE fails.\n",
1884 				__func__);
1885 		else if (val == 0)
1886 			dev_info(dev, "MOST_MODE: Stereo according to blend\n");
1887 		else if (val == 1)
1888 			dev_info(dev, "MOST_MODE: Force mono output\n");
1889 		else
1890 			dev_info(dev, "MOST_MODE: Unexpected value: %d\n", val);
1891 
1892 		r = core->read(core, WL1273_MOST_BLEND_SET, &val);
1893 		if (r)
1894 			dev_err(dev, "%s: Get MOST_BLEND fails.\n", __func__);
1895 		else if (val == 0)
1896 			dev_info(dev,
1897 				 "MOST_BLEND: Switched blend & hysteresis.\n");
1898 		else if (val == 1)
1899 			dev_info(dev, "MOST_BLEND: Soft blend.\n");
1900 		else
1901 			dev_info(dev, "MOST_BLEND: Unexpected val: %d\n", val);
1902 
1903 		r = core->read(core, WL1273_STEREO_GET, &val);
1904 		if (r)
1905 			dev_err(dev, "%s: Get STEREO fails.\n", __func__);
1906 		else if (val == 0)
1907 			dev_info(dev, "STEREO: Not detected\n");
1908 		else if (val == 1)
1909 			dev_info(dev, "STEREO: Detected\n");
1910 		else
1911 			dev_info(dev, "STEREO: Unexpected value: %d\n", val);
1912 
1913 		r = core->read(core, WL1273_RSSI_LVL_GET, &val);
1914 		if (r)
1915 			dev_err(dev, "%s: Get RSSI_LVL fails.\n", __func__);
1916 		else
1917 			dev_info(dev, "RX signal strength: %d\n", (s16) val);
1918 
1919 		r = core->read(core, WL1273_POWER_SET, &val);
1920 		if (r)
1921 			dev_err(dev, "%s: Get POWER fails.\n", __func__);
1922 		else
1923 			dev_info(dev, "POWER: 0x%04x\n", val);
1924 
1925 		r = core->read(core, WL1273_INT_MASK_SET, &val);
1926 		if (r)
1927 			dev_err(dev, "%s: Get INT_MASK fails.\n", __func__);
1928 		else
1929 			dev_info(dev, "INT_MASK: 0x%04x\n", val);
1930 
1931 		r = core->read(core, WL1273_RDS_SYNC_GET, &val);
1932 		if (r)
1933 			dev_err(dev, "%s: Get RDS_SYNC fails.\n",
1934 				__func__);
1935 		else if (val == 0)
1936 			dev_info(dev, "RDS_SYNC: Not synchronized\n");
1937 
1938 		else if (val == 1)
1939 			dev_info(dev, "RDS_SYNC: Synchronized\n");
1940 		else
1941 			dev_info(dev, "RDS_SYNC: Unexpected value: %d\n", val);
1942 
1943 		r = core->read(core, WL1273_I2S_MODE_CONFIG_SET, &val);
1944 		if (r)
1945 			dev_err(dev, "%s: Get I2S_MODE_CONFIG fails.\n",
1946 				__func__);
1947 		else
1948 			dev_info(dev, "I2S_MODE_CONFIG: 0x%04x\n", val);
1949 
1950 		r = core->read(core, WL1273_VOLUME_SET, &val);
1951 		if (r)
1952 			dev_err(dev, "%s: Get VOLUME fails.\n", __func__);
1953 		else
1954 			dev_info(dev, "VOLUME: 0x%04x\n", val);
1955 	}
1956 
1957 	return 0;
1958 }
1959 
1960 static void wl1273_vdev_release(struct video_device *dev)
1961 {
1962 }
1963 
1964 static const struct v4l2_ctrl_ops wl1273_ctrl_ops = {
1965 	.s_ctrl = wl1273_fm_vidioc_s_ctrl,
1966 	.g_volatile_ctrl = wl1273_fm_g_volatile_ctrl,
1967 };
1968 
1969 static const struct v4l2_ioctl_ops wl1273_ioctl_ops = {
1970 	.vidioc_querycap	= wl1273_fm_vidioc_querycap,
1971 	.vidioc_g_input		= wl1273_fm_vidioc_g_input,
1972 	.vidioc_s_input		= wl1273_fm_vidioc_s_input,
1973 	.vidioc_g_audio		= wl1273_fm_vidioc_g_audio,
1974 	.vidioc_s_audio		= wl1273_fm_vidioc_s_audio,
1975 	.vidioc_g_tuner		= wl1273_fm_vidioc_g_tuner,
1976 	.vidioc_s_tuner		= wl1273_fm_vidioc_s_tuner,
1977 	.vidioc_g_frequency	= wl1273_fm_vidioc_g_frequency,
1978 	.vidioc_s_frequency	= wl1273_fm_vidioc_s_frequency,
1979 	.vidioc_s_hw_freq_seek	= wl1273_fm_vidioc_s_hw_freq_seek,
1980 	.vidioc_g_modulator	= wl1273_fm_vidioc_g_modulator,
1981 	.vidioc_s_modulator	= wl1273_fm_vidioc_s_modulator,
1982 	.vidioc_log_status      = wl1273_fm_vidioc_log_status,
1983 };
1984 
1985 static const struct video_device wl1273_viddev_template = {
1986 	.fops			= &wl1273_fops,
1987 	.ioctl_ops		= &wl1273_ioctl_ops,
1988 	.name			= WL1273_FM_DRIVER_NAME,
1989 	.release		= wl1273_vdev_release,
1990 	.vfl_dir		= VFL_DIR_TX,
1991 };
1992 
1993 static int wl1273_fm_radio_remove(struct platform_device *pdev)
1994 {
1995 	struct wl1273_device *radio = platform_get_drvdata(pdev);
1996 	struct wl1273_core *core = radio->core;
1997 
1998 	dev_info(&pdev->dev, "%s.\n", __func__);
1999 
2000 	free_irq(core->client->irq, radio);
2001 	core->pdata->free_resources();
2002 
2003 	v4l2_ctrl_handler_free(&radio->ctrl_handler);
2004 	video_unregister_device(&radio->videodev);
2005 	v4l2_device_unregister(&radio->v4l2dev);
2006 
2007 	return 0;
2008 }
2009 
2010 static int wl1273_fm_radio_probe(struct platform_device *pdev)
2011 {
2012 	struct wl1273_core **core = pdev->dev.platform_data;
2013 	struct wl1273_device *radio;
2014 	struct v4l2_ctrl *ctrl;
2015 	int r = 0;
2016 
2017 	pr_debug("%s\n", __func__);
2018 
2019 	if (!core) {
2020 		dev_err(&pdev->dev, "No platform data.\n");
2021 		r = -EINVAL;
2022 		goto pdata_err;
2023 	}
2024 
2025 	radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL);
2026 	if (!radio) {
2027 		r = -ENOMEM;
2028 		goto pdata_err;
2029 	}
2030 
2031 	/* RDS buffer allocation */
2032 	radio->buf_size = rds_buf * RDS_BLOCK_SIZE;
2033 	radio->buffer = devm_kzalloc(&pdev->dev, radio->buf_size, GFP_KERNEL);
2034 	if (!radio->buffer) {
2035 		pr_err("Cannot allocate memory for RDS buffer.\n");
2036 		r = -ENOMEM;
2037 		goto pdata_err;
2038 	}
2039 
2040 	radio->core = *core;
2041 	radio->irq_flags = WL1273_IRQ_MASK;
2042 	radio->dev = &radio->core->client->dev;
2043 	radio->rds_on = false;
2044 	radio->core->mode = WL1273_MODE_OFF;
2045 	radio->tx_power = 118;
2046 	radio->core->audio_mode = WL1273_AUDIO_ANALOG;
2047 	radio->band = WL1273_BAND_OTHER;
2048 	radio->core->i2s_mode = WL1273_I2S_DEF_MODE;
2049 	radio->core->channel_number = 2;
2050 	radio->core->volume = WL1273_DEFAULT_VOLUME;
2051 	radio->rx_frequency = WL1273_BAND_OTHER_LOW;
2052 	radio->tx_frequency = WL1273_BAND_OTHER_HIGH;
2053 	radio->rangelow = WL1273_BAND_OTHER_LOW;
2054 	radio->rangehigh = WL1273_BAND_OTHER_HIGH;
2055 	radio->stereo = true;
2056 	radio->bus_type = "I2C";
2057 
2058 	if (radio->core->pdata->request_resources) {
2059 		r = radio->core->pdata->request_resources(radio->core->client);
2060 		if (r) {
2061 			dev_err(radio->dev, WL1273_FM_DRIVER_NAME
2062 				": Cannot get platform data\n");
2063 			goto pdata_err;
2064 		}
2065 
2066 		dev_dbg(radio->dev, "irq: %d\n", radio->core->client->irq);
2067 
2068 		r = request_threaded_irq(radio->core->client->irq, NULL,
2069 					 wl1273_fm_irq_thread_handler,
2070 					 IRQF_ONESHOT | IRQF_TRIGGER_FALLING,
2071 					 "wl1273-fm", radio);
2072 		if (r < 0) {
2073 			dev_err(radio->dev, WL1273_FM_DRIVER_NAME
2074 				": Unable to register IRQ handler: %d\n", r);
2075 			goto err_request_irq;
2076 		}
2077 	} else {
2078 		dev_err(radio->dev, WL1273_FM_DRIVER_NAME ": Core WL1273 IRQ not configured");
2079 		r = -EINVAL;
2080 		goto pdata_err;
2081 	}
2082 
2083 	init_completion(&radio->busy);
2084 	init_waitqueue_head(&radio->read_queue);
2085 
2086 	radio->write_buf = devm_kzalloc(&pdev->dev, 256, GFP_KERNEL);
2087 	if (!radio->write_buf) {
2088 		r = -ENOMEM;
2089 		goto write_buf_err;
2090 	}
2091 
2092 	radio->dev = &pdev->dev;
2093 	radio->v4l2dev.ctrl_handler = &radio->ctrl_handler;
2094 	radio->rds_users = 0;
2095 
2096 	r = v4l2_device_register(&pdev->dev, &radio->v4l2dev);
2097 	if (r) {
2098 		dev_err(&pdev->dev, "Cannot register v4l2_device.\n");
2099 		goto write_buf_err;
2100 	}
2101 
2102 	/* V4L2 configuration */
2103 	radio->videodev = wl1273_viddev_template;
2104 
2105 	radio->videodev.v4l2_dev = &radio->v4l2dev;
2106 
2107 	v4l2_ctrl_handler_init(&radio->ctrl_handler, 6);
2108 
2109 	/* add in ascending ID order */
2110 	v4l2_ctrl_new_std(&radio->ctrl_handler, &wl1273_ctrl_ops,
2111 			  V4L2_CID_AUDIO_VOLUME, 0, WL1273_MAX_VOLUME, 1,
2112 			  WL1273_DEFAULT_VOLUME);
2113 
2114 	v4l2_ctrl_new_std(&radio->ctrl_handler, &wl1273_ctrl_ops,
2115 			  V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
2116 
2117 	v4l2_ctrl_new_std_menu(&radio->ctrl_handler, &wl1273_ctrl_ops,
2118 			       V4L2_CID_TUNE_PREEMPHASIS,
2119 			       V4L2_PREEMPHASIS_75_uS, 0x03,
2120 			       V4L2_PREEMPHASIS_50_uS);
2121 
2122 	v4l2_ctrl_new_std(&radio->ctrl_handler, &wl1273_ctrl_ops,
2123 			  V4L2_CID_TUNE_POWER_LEVEL, 91, 122, 1, 118);
2124 
2125 	ctrl = v4l2_ctrl_new_std(&radio->ctrl_handler, &wl1273_ctrl_ops,
2126 				 V4L2_CID_TUNE_ANTENNA_CAPACITOR,
2127 				 0, 255, 1, 255);
2128 	if (ctrl)
2129 		ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
2130 
2131 	if (radio->ctrl_handler.error) {
2132 		r = radio->ctrl_handler.error;
2133 		dev_err(&pdev->dev, "Ctrl handler error: %d\n", r);
2134 		goto handler_init_err;
2135 	}
2136 
2137 	video_set_drvdata(&radio->videodev, radio);
2138 	platform_set_drvdata(pdev, radio);
2139 
2140 	/* register video device */
2141 	r = video_register_device(&radio->videodev, VFL_TYPE_RADIO, radio_nr);
2142 	if (r) {
2143 		dev_err(&pdev->dev, WL1273_FM_DRIVER_NAME
2144 			": Could not register video device\n");
2145 		goto handler_init_err;
2146 	}
2147 
2148 	return 0;
2149 
2150 handler_init_err:
2151 	v4l2_ctrl_handler_free(&radio->ctrl_handler);
2152 	v4l2_device_unregister(&radio->v4l2dev);
2153 write_buf_err:
2154 	free_irq(radio->core->client->irq, radio);
2155 err_request_irq:
2156 	radio->core->pdata->free_resources();
2157 pdata_err:
2158 	return r;
2159 }
2160 
2161 static struct platform_driver wl1273_fm_radio_driver = {
2162 	.probe		= wl1273_fm_radio_probe,
2163 	.remove		= wl1273_fm_radio_remove,
2164 	.driver		= {
2165 		.name	= "wl1273_fm_radio",
2166 	},
2167 };
2168 
2169 module_platform_driver(wl1273_fm_radio_driver);
2170 
2171 MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
2172 MODULE_DESCRIPTION(DRIVER_DESC);
2173 MODULE_LICENSE("GPL");
2174 MODULE_ALIAS("platform:wl1273_fm_radio");
2175