xref: /linux/drivers/media/radio/radio-wl1273.c (revision 0ea5c948cb64bab5bc7a5516774eb8536f05aa0d)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Driver for the Texas Instruments WL1273 FM radio.
4  *
5  * Copyright (C) 2011 Nokia Corporation
6  * Author: Matti J. Aaltonen <matti.j.aaltonen@nokia.com>
7  */
8 
9 #include <linux/delay.h>
10 #include <linux/firmware.h>
11 #include <linux/interrupt.h>
12 #include <linux/mfd/wl1273-core.h>
13 #include <linux/slab.h>
14 #include <linux/module.h>
15 #include <media/v4l2-common.h>
16 #include <media/v4l2-ctrls.h>
17 #include <media/v4l2-device.h>
18 #include <media/v4l2-ioctl.h>
19 
20 #define DRIVER_DESC "Wl1273 FM Radio"
21 
22 #define WL1273_POWER_SET_OFF		0
23 #define WL1273_POWER_SET_FM		BIT(0)
24 #define WL1273_POWER_SET_RDS		BIT(1)
25 #define WL1273_POWER_SET_RETENTION	BIT(4)
26 
27 #define WL1273_PUPD_SET_OFF		0x00
28 #define WL1273_PUPD_SET_ON		0x01
29 #define WL1273_PUPD_SET_RETENTION	0x10
30 
31 #define WL1273_FREQ(x)		(x * 10000 / 625)
32 #define WL1273_INV_FREQ(x)	(x * 625 / 10000)
33 
34 /*
35  * static int radio_nr - The number of the radio device
36  *
37  * The default is 0.
38  */
39 static int radio_nr;
40 module_param(radio_nr, int, 0);
41 MODULE_PARM_DESC(radio_nr, "The number of the radio device. Default = 0");
42 
43 struct wl1273_device {
44 	char *bus_type;
45 
46 	u8 forbidden;
47 	unsigned int preemphasis;
48 	unsigned int spacing;
49 	unsigned int tx_power;
50 	unsigned int rx_frequency;
51 	unsigned int tx_frequency;
52 	unsigned int rangelow;
53 	unsigned int rangehigh;
54 	unsigned int band;
55 	bool stereo;
56 
57 	/* RDS */
58 	unsigned int rds_on;
59 
60 	wait_queue_head_t read_queue;
61 	struct mutex lock; /* for serializing fm radio operations */
62 	struct completion busy;
63 
64 	unsigned char *buffer;
65 	unsigned int buf_size;
66 	unsigned int rd_index;
67 	unsigned int wr_index;
68 
69 	/* Selected interrupts */
70 	u16 irq_flags;
71 	u16 irq_received;
72 
73 	struct v4l2_ctrl_handler ctrl_handler;
74 	struct v4l2_device v4l2dev;
75 	struct video_device videodev;
76 	struct device *dev;
77 	struct wl1273_core *core;
78 	struct file *owner;
79 	char *write_buf;
80 	unsigned int rds_users;
81 };
82 
83 #define WL1273_IRQ_MASK	 (WL1273_FR_EVENT		|	\
84 			  WL1273_POW_ENB_EVENT)
85 
86 /*
87  * static unsigned int rds_buf - the number of RDS buffer blocks used.
88  *
89  * The default number is 100.
90  */
91 static unsigned int rds_buf = 100;
92 module_param(rds_buf, uint, 0);
93 MODULE_PARM_DESC(rds_buf, "Number of RDS buffer entries. Default = 100");
94 
wl1273_fm_write_fw(struct wl1273_core * core,__u8 * fw,int len)95 static int wl1273_fm_write_fw(struct wl1273_core *core,
96 			      __u8 *fw, int len)
97 {
98 	struct i2c_client *client = core->client;
99 	struct i2c_msg msg;
100 	int i, r = 0;
101 
102 	msg.addr = client->addr;
103 	msg.flags = 0;
104 
105 	for (i = 0; i <= len; i++) {
106 		msg.len = fw[0];
107 		msg.buf = fw + 1;
108 
109 		fw += msg.len + 1;
110 		dev_dbg(&client->dev, "%s:len[%d]: %d\n", __func__, i, msg.len);
111 
112 		r = i2c_transfer(client->adapter, &msg, 1);
113 		if (r < 0 && i < len + 1)
114 			break;
115 	}
116 
117 	dev_dbg(&client->dev, "%s: i: %d\n", __func__, i);
118 	dev_dbg(&client->dev, "%s: len + 1: %d\n", __func__, len + 1);
119 
120 	/* Last transfer always fails. */
121 	if (i == len || r == 1)
122 		r = 0;
123 
124 	return r;
125 }
126 
127 #define WL1273_FIFO_HAS_DATA(status)	(1 << 5 & status)
128 #define WL1273_RDS_CORRECTABLE_ERROR	(1 << 3)
129 #define WL1273_RDS_UNCORRECTABLE_ERROR	(1 << 4)
130 
wl1273_fm_rds(struct wl1273_device * radio)131 static int wl1273_fm_rds(struct wl1273_device *radio)
132 {
133 	struct wl1273_core *core = radio->core;
134 	struct i2c_client *client = core->client;
135 	u16 val;
136 	u8 b0 = WL1273_RDS_DATA_GET, status;
137 	struct v4l2_rds_data rds = { 0, 0, 0 };
138 	struct i2c_msg msg[] = {
139 		{
140 			.addr = client->addr,
141 			.flags = 0,
142 			.buf = &b0,
143 			.len = 1,
144 		},
145 		{
146 			.addr = client->addr,
147 			.flags = I2C_M_RD,
148 			.buf = (u8 *) &rds,
149 			.len = sizeof(rds),
150 		}
151 	};
152 	int r;
153 
154 	if (core->mode != WL1273_MODE_RX)
155 		return 0;
156 
157 	r = core->read(core, WL1273_RDS_SYNC_GET, &val);
158 	if (r)
159 		return r;
160 
161 	if ((val & 0x01) == 0) {
162 		/* RDS decoder not synchronized */
163 		return -EAGAIN;
164 	}
165 
166 	/* copy all four RDS blocks to internal buffer */
167 	do {
168 		r = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
169 		if (r != ARRAY_SIZE(msg)) {
170 			dev_err(radio->dev, WL1273_FM_DRIVER_NAME
171 				": %s: read_rds error r == %i)\n",
172 				__func__, r);
173 		}
174 
175 		status = rds.block;
176 
177 		if (!WL1273_FIFO_HAS_DATA(status))
178 			break;
179 
180 		/* copy bits 0-2 (the block ID) to bits 3-5 */
181 		rds.block = V4L2_RDS_BLOCK_MSK & status;
182 		rds.block |= rds.block << 3;
183 
184 		/* copy the error bits to standard positions */
185 		if (WL1273_RDS_UNCORRECTABLE_ERROR & status) {
186 			rds.block |= V4L2_RDS_BLOCK_ERROR;
187 			rds.block &= ~V4L2_RDS_BLOCK_CORRECTED;
188 		} else if  (WL1273_RDS_CORRECTABLE_ERROR & status) {
189 			rds.block &= ~V4L2_RDS_BLOCK_ERROR;
190 			rds.block |= V4L2_RDS_BLOCK_CORRECTED;
191 		}
192 
193 		/* copy RDS block to internal buffer */
194 		memcpy(&radio->buffer[radio->wr_index], &rds, RDS_BLOCK_SIZE);
195 		radio->wr_index += 3;
196 
197 		/* wrap write pointer */
198 		if (radio->wr_index >= radio->buf_size)
199 			radio->wr_index = 0;
200 
201 		/* check for overflow & start over */
202 		if (radio->wr_index == radio->rd_index) {
203 			dev_dbg(radio->dev, "RDS OVERFLOW");
204 
205 			radio->rd_index = 0;
206 			radio->wr_index = 0;
207 			break;
208 		}
209 	} while (WL1273_FIFO_HAS_DATA(status));
210 
211 	/* wake up read queue */
212 	if (radio->wr_index != radio->rd_index)
213 		wake_up_interruptible(&radio->read_queue);
214 
215 	return 0;
216 }
217 
wl1273_fm_irq_thread_handler(int irq,void * dev_id)218 static irqreturn_t wl1273_fm_irq_thread_handler(int irq, void *dev_id)
219 {
220 	struct wl1273_device *radio = dev_id;
221 	struct wl1273_core *core = radio->core;
222 	u16 flags;
223 	int r;
224 
225 	r = core->read(core, WL1273_FLAG_GET, &flags);
226 	if (r)
227 		goto out;
228 
229 	if (flags & WL1273_BL_EVENT) {
230 		radio->irq_received = flags;
231 		dev_dbg(radio->dev, "IRQ: BL\n");
232 	}
233 
234 	if (flags & WL1273_RDS_EVENT) {
235 		msleep(200);
236 
237 		wl1273_fm_rds(radio);
238 	}
239 
240 	if (flags & WL1273_BBLK_EVENT)
241 		dev_dbg(radio->dev, "IRQ: BBLK\n");
242 
243 	if (flags & WL1273_LSYNC_EVENT)
244 		dev_dbg(radio->dev, "IRQ: LSYNC\n");
245 
246 	if (flags & WL1273_LEV_EVENT) {
247 		u16 level;
248 
249 		r = core->read(core, WL1273_RSSI_LVL_GET, &level);
250 		if (r)
251 			goto out;
252 
253 		if (level > 14)
254 			dev_dbg(radio->dev, "IRQ: LEV: 0x%x04\n", level);
255 	}
256 
257 	if (flags & WL1273_IFFR_EVENT)
258 		dev_dbg(radio->dev, "IRQ: IFFR\n");
259 
260 	if (flags & WL1273_PI_EVENT)
261 		dev_dbg(radio->dev, "IRQ: PI\n");
262 
263 	if (flags & WL1273_PD_EVENT)
264 		dev_dbg(radio->dev, "IRQ: PD\n");
265 
266 	if (flags & WL1273_STIC_EVENT)
267 		dev_dbg(radio->dev, "IRQ: STIC\n");
268 
269 	if (flags & WL1273_MAL_EVENT)
270 		dev_dbg(radio->dev, "IRQ: MAL\n");
271 
272 	if (flags & WL1273_POW_ENB_EVENT) {
273 		complete(&radio->busy);
274 		dev_dbg(radio->dev, "NOT BUSY\n");
275 		dev_dbg(radio->dev, "IRQ: POW_ENB\n");
276 	}
277 
278 	if (flags & WL1273_SCAN_OVER_EVENT)
279 		dev_dbg(radio->dev, "IRQ: SCAN_OVER\n");
280 
281 	if (flags & WL1273_ERROR_EVENT)
282 		dev_dbg(radio->dev, "IRQ: ERROR\n");
283 
284 	if (flags & WL1273_FR_EVENT) {
285 		u16 freq;
286 
287 		dev_dbg(radio->dev, "IRQ: FR:\n");
288 
289 		if (core->mode == WL1273_MODE_RX) {
290 			r = core->write(core, WL1273_TUNER_MODE_SET,
291 					TUNER_MODE_STOP_SEARCH);
292 			if (r) {
293 				dev_err(radio->dev,
294 					"%s: TUNER_MODE_SET fails: %d\n",
295 					__func__, r);
296 				goto out;
297 			}
298 
299 			r = core->read(core, WL1273_FREQ_SET, &freq);
300 			if (r)
301 				goto out;
302 
303 			if (radio->band == WL1273_BAND_JAPAN)
304 				radio->rx_frequency = WL1273_BAND_JAPAN_LOW +
305 					freq * 50;
306 			else
307 				radio->rx_frequency = WL1273_BAND_OTHER_LOW +
308 					freq * 50;
309 			/*
310 			 *  The driver works better with this msleep,
311 			 *  the documentation doesn't mention it.
312 			 */
313 			usleep_range(10000, 15000);
314 
315 			dev_dbg(radio->dev, "%dkHz\n", radio->rx_frequency);
316 
317 		} else {
318 			r = core->read(core, WL1273_CHANL_SET, &freq);
319 			if (r)
320 				goto out;
321 
322 			dev_dbg(radio->dev, "%dkHz\n", freq);
323 		}
324 		dev_dbg(radio->dev, "%s: NOT BUSY\n", __func__);
325 	}
326 
327 out:
328 	core->write(core, WL1273_INT_MASK_SET, radio->irq_flags);
329 	complete(&radio->busy);
330 
331 	return IRQ_HANDLED;
332 }
333 
wl1273_fm_set_tx_freq(struct wl1273_device * radio,unsigned int freq)334 static int wl1273_fm_set_tx_freq(struct wl1273_device *radio, unsigned int freq)
335 {
336 	struct wl1273_core *core = radio->core;
337 	int r = 0;
338 	unsigned long t;
339 
340 	if (freq < WL1273_BAND_TX_LOW) {
341 		dev_err(radio->dev,
342 			"Frequency out of range: %d < %d\n", freq,
343 			WL1273_BAND_TX_LOW);
344 		return -ERANGE;
345 	}
346 
347 	if (freq > WL1273_BAND_TX_HIGH) {
348 		dev_err(radio->dev,
349 			"Frequency out of range: %d > %d\n", freq,
350 			WL1273_BAND_TX_HIGH);
351 		return -ERANGE;
352 	}
353 
354 	/*
355 	 *  The driver works better with this sleep,
356 	 *  the documentation doesn't mention it.
357 	 */
358 	usleep_range(5000, 10000);
359 
360 	dev_dbg(radio->dev, "%s: freq: %d kHz\n", __func__, freq);
361 
362 	/* Set the current tx channel */
363 	r = core->write(core, WL1273_CHANL_SET, freq / 10);
364 	if (r)
365 		return r;
366 
367 	reinit_completion(&radio->busy);
368 
369 	/* wait for the FR IRQ */
370 	t = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(2000));
371 	if (!t)
372 		return -ETIMEDOUT;
373 
374 	dev_dbg(radio->dev, "WL1273_CHANL_SET: %lu\n", t);
375 
376 	/* Enable the output power */
377 	r = core->write(core, WL1273_POWER_ENB_SET, 1);
378 	if (r)
379 		return r;
380 
381 	reinit_completion(&radio->busy);
382 
383 	/* wait for the POWER_ENB IRQ */
384 	t = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(1000));
385 	if (!t)
386 		return -ETIMEDOUT;
387 
388 	radio->tx_frequency = freq;
389 	dev_dbg(radio->dev, "WL1273_POWER_ENB_SET: %lu\n", t);
390 
391 	return	0;
392 }
393 
wl1273_fm_set_rx_freq(struct wl1273_device * radio,unsigned int freq)394 static int wl1273_fm_set_rx_freq(struct wl1273_device *radio, unsigned int freq)
395 {
396 	struct wl1273_core *core = radio->core;
397 	int r, f;
398 	unsigned long t;
399 
400 	if (freq < radio->rangelow) {
401 		dev_err(radio->dev,
402 			"Frequency out of range: %d < %d\n", freq,
403 			radio->rangelow);
404 		r = -ERANGE;
405 		goto err;
406 	}
407 
408 	if (freq > radio->rangehigh) {
409 		dev_err(radio->dev,
410 			"Frequency out of range: %d > %d\n", freq,
411 			radio->rangehigh);
412 		r = -ERANGE;
413 		goto err;
414 	}
415 
416 	dev_dbg(radio->dev, "%s: %dkHz\n", __func__, freq);
417 
418 	core->write(core, WL1273_INT_MASK_SET, radio->irq_flags);
419 
420 	if (radio->band == WL1273_BAND_JAPAN)
421 		f = (freq - WL1273_BAND_JAPAN_LOW) / 50;
422 	else
423 		f = (freq - WL1273_BAND_OTHER_LOW) / 50;
424 
425 	r = core->write(core, WL1273_FREQ_SET, f);
426 	if (r) {
427 		dev_err(radio->dev, "FREQ_SET fails\n");
428 		goto err;
429 	}
430 
431 	r = core->write(core, WL1273_TUNER_MODE_SET, TUNER_MODE_PRESET);
432 	if (r) {
433 		dev_err(radio->dev, "TUNER_MODE_SET fails\n");
434 		goto err;
435 	}
436 
437 	reinit_completion(&radio->busy);
438 
439 	t = wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(2000));
440 	if (!t) {
441 		dev_err(radio->dev, "%s: TIMEOUT\n", __func__);
442 		return -ETIMEDOUT;
443 	}
444 
445 	radio->rd_index = 0;
446 	radio->wr_index = 0;
447 	radio->rx_frequency = freq;
448 	return 0;
449 err:
450 	return r;
451 }
452 
wl1273_fm_get_freq(struct wl1273_device * radio)453 static int wl1273_fm_get_freq(struct wl1273_device *radio)
454 {
455 	struct wl1273_core *core = radio->core;
456 	unsigned int freq;
457 	u16 f;
458 	int r;
459 
460 	if (core->mode == WL1273_MODE_RX) {
461 		r = core->read(core, WL1273_FREQ_SET, &f);
462 		if (r)
463 			return r;
464 
465 		dev_dbg(radio->dev, "Freq get: 0x%04x\n", f);
466 		if (radio->band == WL1273_BAND_JAPAN)
467 			freq = WL1273_BAND_JAPAN_LOW + 50 * f;
468 		else
469 			freq = WL1273_BAND_OTHER_LOW + 50 * f;
470 	} else {
471 		r = core->read(core, WL1273_CHANL_SET, &f);
472 		if (r)
473 			return r;
474 
475 		freq = f * 10;
476 	}
477 
478 	return freq;
479 }
480 
481 /**
482  * wl1273_fm_upload_firmware_patch() -	Upload the firmware.
483  * @radio:				A pointer to the device struct.
484  *
485  * The firmware file consists of arrays of bytes where the first byte
486  * gives the array length. The first byte in the file gives the
487  * number of these arrays.
488  */
wl1273_fm_upload_firmware_patch(struct wl1273_device * radio)489 static int wl1273_fm_upload_firmware_patch(struct wl1273_device *radio)
490 {
491 	struct wl1273_core *core = radio->core;
492 	unsigned int packet_num;
493 	const struct firmware *fw_p;
494 	const char *fw_name = "radio-wl1273-fw.bin";
495 	struct device *dev = radio->dev;
496 	__u8 *ptr;
497 	int r;
498 
499 	dev_dbg(dev, "%s:\n", __func__);
500 
501 	/*
502 	 * Uploading the firmware patch is not always necessary,
503 	 * so we only print an info message.
504 	 */
505 	if (request_firmware(&fw_p, fw_name, dev)) {
506 		dev_info(dev, "%s - %s not found\n", __func__, fw_name);
507 
508 		return 0;
509 	}
510 
511 	ptr = (__u8 *) fw_p->data;
512 	packet_num = ptr[0];
513 	dev_dbg(dev, "%s: packets: %d\n", __func__, packet_num);
514 
515 	r = wl1273_fm_write_fw(core, ptr + 1, packet_num);
516 	if (r) {
517 		dev_err(dev, "FW upload error: %d\n", r);
518 		goto out;
519 	}
520 
521 	/* ignore possible error here */
522 	core->write(core, WL1273_RESET, 0);
523 
524 	dev_dbg(dev, "%s - download OK, r: %d\n", __func__, r);
525 out:
526 	release_firmware(fw_p);
527 	return r;
528 }
529 
wl1273_fm_stop(struct wl1273_device * radio)530 static int wl1273_fm_stop(struct wl1273_device *radio)
531 {
532 	struct wl1273_core *core = radio->core;
533 
534 	if (core->mode == WL1273_MODE_RX) {
535 		int r = core->write(core, WL1273_POWER_SET,
536 				    WL1273_POWER_SET_OFF);
537 		if (r)
538 			dev_err(radio->dev, "%s: POWER_SET fails: %d\n",
539 				__func__, r);
540 	} else if (core->mode == WL1273_MODE_TX) {
541 		int r = core->write(core, WL1273_PUPD_SET,
542 				    WL1273_PUPD_SET_OFF);
543 		if (r)
544 			dev_err(radio->dev,
545 				"%s: PUPD_SET fails: %d\n", __func__, r);
546 	}
547 
548 	if (core->pdata->disable) {
549 		core->pdata->disable();
550 		dev_dbg(radio->dev, "Back to reset\n");
551 	}
552 
553 	return 0;
554 }
555 
wl1273_fm_start(struct wl1273_device * radio,int new_mode)556 static int wl1273_fm_start(struct wl1273_device *radio, int new_mode)
557 {
558 	struct wl1273_core *core = radio->core;
559 	struct wl1273_fm_platform_data *pdata = core->pdata;
560 	struct device *dev = radio->dev;
561 	int r = -EINVAL;
562 
563 	if (pdata->enable && core->mode == WL1273_MODE_OFF) {
564 		dev_dbg(radio->dev, "Out of reset\n");
565 
566 		pdata->enable();
567 		msleep(250);
568 	}
569 
570 	if (new_mode == WL1273_MODE_RX) {
571 		u16 val = WL1273_POWER_SET_FM;
572 
573 		if (radio->rds_on)
574 			val |= WL1273_POWER_SET_RDS;
575 
576 		/* If this fails try again */
577 		r = core->write(core, WL1273_POWER_SET, val);
578 		if (r) {
579 			msleep(100);
580 
581 			r = core->write(core, WL1273_POWER_SET, val);
582 			if (r) {
583 				dev_err(dev, "%s: POWER_SET fails\n", __func__);
584 				goto fail;
585 			}
586 		}
587 
588 		/* rds buffer configuration */
589 		radio->wr_index = 0;
590 		radio->rd_index = 0;
591 
592 	} else if (new_mode == WL1273_MODE_TX) {
593 		/* If this fails try again once */
594 		r = core->write(core, WL1273_PUPD_SET, WL1273_PUPD_SET_ON);
595 		if (r) {
596 			msleep(100);
597 			r = core->write(core, WL1273_PUPD_SET,
598 					WL1273_PUPD_SET_ON);
599 			if (r) {
600 				dev_err(dev, "%s: PUPD_SET fails\n", __func__);
601 				goto fail;
602 			}
603 		}
604 
605 		if (radio->rds_on) {
606 			r = core->write(core, WL1273_RDS_DATA_ENB, 1);
607 			if (r) {
608 				dev_err(dev, "%s: RDS_DATA_ENB ON fails\n",
609 					__func__);
610 				goto fail;
611 			}
612 		} else {
613 			r = core->write(core, WL1273_RDS_DATA_ENB, 0);
614 			if (r) {
615 				dev_err(dev, "%s: RDS_DATA_ENB OFF fails\n",
616 					__func__);
617 				goto fail;
618 			}
619 		}
620 	} else {
621 		dev_warn(dev, "%s: Illegal mode.\n", __func__);
622 	}
623 
624 	if (core->mode == WL1273_MODE_OFF) {
625 		r = wl1273_fm_upload_firmware_patch(radio);
626 		if (r)
627 			dev_warn(dev, "Firmware upload failed.\n");
628 
629 		/*
630 		 * Sometimes the chip is in a wrong power state at this point.
631 		 * So we set the power once again.
632 		 */
633 		if (new_mode == WL1273_MODE_RX) {
634 			u16 val = WL1273_POWER_SET_FM;
635 
636 			if (radio->rds_on)
637 				val |= WL1273_POWER_SET_RDS;
638 
639 			r = core->write(core, WL1273_POWER_SET, val);
640 			if (r) {
641 				dev_err(dev, "%s: POWER_SET fails\n", __func__);
642 				goto fail;
643 			}
644 		} else if (new_mode == WL1273_MODE_TX) {
645 			r = core->write(core, WL1273_PUPD_SET,
646 					WL1273_PUPD_SET_ON);
647 			if (r) {
648 				dev_err(dev, "%s: PUPD_SET fails\n", __func__);
649 				goto fail;
650 			}
651 		}
652 	}
653 
654 	return 0;
655 fail:
656 	if (pdata->disable)
657 		pdata->disable();
658 
659 	dev_dbg(dev, "%s: return: %d\n", __func__, r);
660 	return r;
661 }
662 
wl1273_fm_suspend(struct wl1273_device * radio)663 static int wl1273_fm_suspend(struct wl1273_device *radio)
664 {
665 	struct wl1273_core *core = radio->core;
666 	int r;
667 
668 	/* Cannot go from OFF to SUSPENDED */
669 	if (core->mode == WL1273_MODE_RX)
670 		r = core->write(core, WL1273_POWER_SET,
671 				WL1273_POWER_SET_RETENTION);
672 	else if (core->mode == WL1273_MODE_TX)
673 		r = core->write(core, WL1273_PUPD_SET,
674 				WL1273_PUPD_SET_RETENTION);
675 	else
676 		r = -EINVAL;
677 
678 	if (r) {
679 		dev_err(radio->dev, "%s: POWER_SET fails: %d\n", __func__, r);
680 		goto out;
681 	}
682 
683 out:
684 	return r;
685 }
686 
wl1273_fm_set_mode(struct wl1273_device * radio,int mode)687 static int wl1273_fm_set_mode(struct wl1273_device *radio, int mode)
688 {
689 	struct wl1273_core *core = radio->core;
690 	struct device *dev = radio->dev;
691 	int old_mode;
692 	int r;
693 
694 	dev_dbg(dev, "%s\n", __func__);
695 	dev_dbg(dev, "Forbidden modes: 0x%02x\n", radio->forbidden);
696 
697 	old_mode = core->mode;
698 	if (mode & radio->forbidden) {
699 		r = -EPERM;
700 		goto out;
701 	}
702 
703 	switch (mode) {
704 	case WL1273_MODE_RX:
705 	case WL1273_MODE_TX:
706 		r = wl1273_fm_start(radio, mode);
707 		if (r) {
708 			dev_err(dev, "%s: Cannot start.\n", __func__);
709 			wl1273_fm_stop(radio);
710 			goto out;
711 		}
712 
713 		core->mode = mode;
714 		r = core->write(core, WL1273_INT_MASK_SET, radio->irq_flags);
715 		if (r) {
716 			dev_err(dev, "INT_MASK_SET fails.\n");
717 			goto out;
718 		}
719 
720 		/* remember previous settings */
721 		if (mode == WL1273_MODE_RX) {
722 			r = wl1273_fm_set_rx_freq(radio, radio->rx_frequency);
723 			if (r) {
724 				dev_err(dev, "set freq fails: %d.\n", r);
725 				goto out;
726 			}
727 
728 			r = core->set_volume(core, core->volume);
729 			if (r) {
730 				dev_err(dev, "set volume fails: %d.\n", r);
731 				goto out;
732 			}
733 
734 			dev_dbg(dev, "%s: Set vol: %d.\n", __func__,
735 				core->volume);
736 		} else {
737 			r = wl1273_fm_set_tx_freq(radio, radio->tx_frequency);
738 			if (r) {
739 				dev_err(dev, "set freq fails: %d.\n", r);
740 				goto out;
741 			}
742 		}
743 
744 		dev_dbg(radio->dev, "%s: Set audio mode.\n", __func__);
745 
746 		r = core->set_audio(core, core->audio_mode);
747 		if (r)
748 			dev_err(dev, "Cannot set audio mode.\n");
749 		break;
750 
751 	case WL1273_MODE_OFF:
752 		r = wl1273_fm_stop(radio);
753 		if (r)
754 			dev_err(dev, "%s: Off fails: %d\n", __func__, r);
755 		else
756 			core->mode = WL1273_MODE_OFF;
757 
758 		break;
759 
760 	case WL1273_MODE_SUSPENDED:
761 		r = wl1273_fm_suspend(radio);
762 		if (r)
763 			dev_err(dev, "%s: Suspend fails: %d\n", __func__, r);
764 		else
765 			core->mode = WL1273_MODE_SUSPENDED;
766 
767 		break;
768 
769 	default:
770 		dev_err(dev, "%s: Unknown mode: %d\n", __func__, mode);
771 		r = -EINVAL;
772 		break;
773 	}
774 out:
775 	if (r)
776 		core->mode = old_mode;
777 
778 	return r;
779 }
780 
wl1273_fm_set_seek(struct wl1273_device * radio,unsigned int wrap_around,unsigned int seek_upward,int level)781 static int wl1273_fm_set_seek(struct wl1273_device *radio,
782 			      unsigned int wrap_around,
783 			      unsigned int seek_upward,
784 			      int level)
785 {
786 	struct wl1273_core *core = radio->core;
787 	int r = 0;
788 	unsigned int dir = (seek_upward == 0) ? 0 : 1;
789 	unsigned int f;
790 
791 	f = radio->rx_frequency;
792 	dev_dbg(radio->dev, "rx_frequency: %d\n", f);
793 
794 	if (dir && f + radio->spacing <= radio->rangehigh)
795 		r = wl1273_fm_set_rx_freq(radio, f + radio->spacing);
796 	else if (dir && wrap_around)
797 		r = wl1273_fm_set_rx_freq(radio, radio->rangelow);
798 	else if (f - radio->spacing >= radio->rangelow)
799 		r = wl1273_fm_set_rx_freq(radio, f - radio->spacing);
800 	else if (wrap_around)
801 		r = wl1273_fm_set_rx_freq(radio, radio->rangehigh);
802 
803 	if (r)
804 		goto out;
805 
806 	if (level < SCHAR_MIN || level > SCHAR_MAX)
807 		return -EINVAL;
808 
809 	reinit_completion(&radio->busy);
810 	dev_dbg(radio->dev, "%s: BUSY\n", __func__);
811 
812 	r = core->write(core, WL1273_INT_MASK_SET, radio->irq_flags);
813 	if (r)
814 		goto out;
815 
816 	dev_dbg(radio->dev, "%s\n", __func__);
817 
818 	r = core->write(core, WL1273_SEARCH_LVL_SET, level);
819 	if (r)
820 		goto out;
821 
822 	r = core->write(core, WL1273_SEARCH_DIR_SET, dir);
823 	if (r)
824 		goto out;
825 
826 	r = core->write(core, WL1273_TUNER_MODE_SET, TUNER_MODE_AUTO_SEEK);
827 	if (r)
828 		goto out;
829 
830 	/* wait for the FR IRQ */
831 	wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(1000));
832 	if (!(radio->irq_received & WL1273_BL_EVENT)) {
833 		r = -ETIMEDOUT;
834 		goto out;
835 	}
836 
837 	radio->irq_received &= ~WL1273_BL_EVENT;
838 
839 	if (!wrap_around)
840 		goto out;
841 
842 	/* Wrap around */
843 	dev_dbg(radio->dev, "Wrap around in HW seek.\n");
844 
845 	if (seek_upward)
846 		f = radio->rangelow;
847 	else
848 		f = radio->rangehigh;
849 
850 	r = wl1273_fm_set_rx_freq(radio, f);
851 	if (r)
852 		goto out;
853 
854 	reinit_completion(&radio->busy);
855 	dev_dbg(radio->dev, "%s: BUSY\n", __func__);
856 
857 	r = core->write(core, WL1273_TUNER_MODE_SET, TUNER_MODE_AUTO_SEEK);
858 	if (r)
859 		goto out;
860 
861 	/* wait for the FR IRQ */
862 	if (!wait_for_completion_timeout(&radio->busy, msecs_to_jiffies(1000)))
863 		r = -ETIMEDOUT;
864 out:
865 	dev_dbg(radio->dev, "%s: Err: %d\n", __func__, r);
866 	return r;
867 }
868 
869 /**
870  * wl1273_fm_get_tx_ctune() -	Get the TX tuning capacitor value.
871  * @radio:			A pointer to the device struct.
872  */
wl1273_fm_get_tx_ctune(struct wl1273_device * radio)873 static unsigned int wl1273_fm_get_tx_ctune(struct wl1273_device *radio)
874 {
875 	struct wl1273_core *core = radio->core;
876 	struct device *dev = radio->dev;
877 	u16 val;
878 	int r;
879 
880 	if (core->mode == WL1273_MODE_OFF ||
881 	    core->mode == WL1273_MODE_SUSPENDED)
882 		return -EPERM;
883 
884 	r = core->read(core, WL1273_READ_FMANT_TUNE_VALUE, &val);
885 	if (r) {
886 		dev_err(dev, "%s: read error: %d\n", __func__, r);
887 		goto out;
888 	}
889 
890 out:
891 	return val;
892 }
893 
894 /**
895  * wl1273_fm_set_preemphasis() - Set the TX pre-emphasis value.
896  * @radio:			 A pointer to the device struct.
897  * @preemphasis:		 The new pre-amphasis value.
898  *
899  * Possible pre-emphasis values are: V4L2_PREEMPHASIS_DISABLED,
900  * V4L2_PREEMPHASIS_50_uS and V4L2_PREEMPHASIS_75_uS.
901  */
wl1273_fm_set_preemphasis(struct wl1273_device * radio,unsigned int preemphasis)902 static int wl1273_fm_set_preemphasis(struct wl1273_device *radio,
903 				     unsigned int preemphasis)
904 {
905 	struct wl1273_core *core = radio->core;
906 	int r;
907 	u16 em;
908 
909 	if (core->mode == WL1273_MODE_OFF ||
910 	    core->mode == WL1273_MODE_SUSPENDED)
911 		return -EPERM;
912 
913 	mutex_lock(&core->lock);
914 
915 	switch (preemphasis) {
916 	case V4L2_PREEMPHASIS_DISABLED:
917 		em = 1;
918 		break;
919 	case V4L2_PREEMPHASIS_50_uS:
920 		em = 0;
921 		break;
922 	case V4L2_PREEMPHASIS_75_uS:
923 		em = 2;
924 		break;
925 	default:
926 		r = -EINVAL;
927 		goto out;
928 	}
929 
930 	r = core->write(core, WL1273_PREMPH_SET, em);
931 	if (r)
932 		goto out;
933 
934 	radio->preemphasis = preemphasis;
935 
936 out:
937 	mutex_unlock(&core->lock);
938 	return r;
939 }
940 
wl1273_fm_rds_on(struct wl1273_device * radio)941 static int wl1273_fm_rds_on(struct wl1273_device *radio)
942 {
943 	struct wl1273_core *core = radio->core;
944 	int r;
945 
946 	dev_dbg(radio->dev, "%s\n", __func__);
947 	if (radio->rds_on)
948 		return 0;
949 
950 	r = core->write(core, WL1273_POWER_SET,
951 			WL1273_POWER_SET_FM | WL1273_POWER_SET_RDS);
952 	if (r)
953 		goto out;
954 
955 	r = wl1273_fm_set_rx_freq(radio, radio->rx_frequency);
956 	if (r)
957 		dev_err(radio->dev, "set freq fails: %d.\n", r);
958 out:
959 	return r;
960 }
961 
wl1273_fm_rds_off(struct wl1273_device * radio)962 static int wl1273_fm_rds_off(struct wl1273_device *radio)
963 {
964 	struct wl1273_core *core = radio->core;
965 	int r;
966 
967 	if (!radio->rds_on)
968 		return 0;
969 
970 	radio->irq_flags &= ~WL1273_RDS_EVENT;
971 
972 	r = core->write(core, WL1273_INT_MASK_SET, radio->irq_flags);
973 	if (r)
974 		goto out;
975 
976 	/* Service pending read */
977 	wake_up_interruptible(&radio->read_queue);
978 
979 	dev_dbg(radio->dev, "%s\n", __func__);
980 
981 	r = core->write(core, WL1273_POWER_SET, WL1273_POWER_SET_FM);
982 	if (r)
983 		goto out;
984 
985 	r = wl1273_fm_set_rx_freq(radio, radio->rx_frequency);
986 	if (r)
987 		dev_err(radio->dev, "set freq fails: %d.\n", r);
988 out:
989 	dev_dbg(radio->dev, "%s: exiting...\n", __func__);
990 
991 	return r;
992 }
993 
wl1273_fm_set_rds(struct wl1273_device * radio,unsigned int new_mode)994 static int wl1273_fm_set_rds(struct wl1273_device *radio, unsigned int new_mode)
995 {
996 	int r = 0;
997 	struct wl1273_core *core = radio->core;
998 
999 	if (core->mode == WL1273_MODE_OFF ||
1000 	    core->mode == WL1273_MODE_SUSPENDED)
1001 		return -EPERM;
1002 
1003 	if (new_mode == WL1273_RDS_RESET) {
1004 		r = core->write(core, WL1273_RDS_CNTRL_SET, 1);
1005 		return r;
1006 	}
1007 
1008 	if (core->mode == WL1273_MODE_TX && new_mode == WL1273_RDS_OFF) {
1009 		r = core->write(core, WL1273_RDS_DATA_ENB, 0);
1010 	} else if (core->mode == WL1273_MODE_TX && new_mode == WL1273_RDS_ON) {
1011 		r = core->write(core, WL1273_RDS_DATA_ENB, 1);
1012 	} else if (core->mode == WL1273_MODE_RX && new_mode == WL1273_RDS_OFF) {
1013 		r = wl1273_fm_rds_off(radio);
1014 	} else if (core->mode == WL1273_MODE_RX && new_mode == WL1273_RDS_ON) {
1015 		r = wl1273_fm_rds_on(radio);
1016 	} else {
1017 		dev_err(radio->dev, "%s: Unknown mode: %d\n",
1018 			__func__, new_mode);
1019 		r = -EINVAL;
1020 	}
1021 
1022 	if (!r)
1023 		radio->rds_on = new_mode == WL1273_RDS_ON;
1024 
1025 	return r;
1026 }
1027 
wl1273_fm_fops_write(struct file * file,const char __user * buf,size_t count,loff_t * ppos)1028 static ssize_t wl1273_fm_fops_write(struct file *file, const char __user *buf,
1029 				    size_t count, loff_t *ppos)
1030 {
1031 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1032 	struct wl1273_core *core = radio->core;
1033 	u16 val;
1034 	int r;
1035 
1036 	dev_dbg(radio->dev, "%s\n", __func__);
1037 
1038 	if (core->mode != WL1273_MODE_TX)
1039 		return count;
1040 
1041 	if (radio->rds_users == 0) {
1042 		dev_warn(radio->dev, "%s: RDS not on.\n", __func__);
1043 		return 0;
1044 	}
1045 
1046 	if (mutex_lock_interruptible(&core->lock))
1047 		return -EINTR;
1048 	/*
1049 	 * Multiple processes can open the device, but only
1050 	 * one gets to write to it.
1051 	 */
1052 	if (radio->owner && radio->owner != file) {
1053 		r = -EBUSY;
1054 		goto out;
1055 	}
1056 	radio->owner = file;
1057 
1058 	/* Manual Mode */
1059 	if (count > 255)
1060 		val = 255;
1061 	else
1062 		val = count;
1063 
1064 	core->write(core, WL1273_RDS_CONFIG_DATA_SET, val);
1065 
1066 	if (copy_from_user(radio->write_buf + 1, buf, val)) {
1067 		r = -EFAULT;
1068 		goto out;
1069 	}
1070 
1071 	dev_dbg(radio->dev, "Count: %d\n", val);
1072 	dev_dbg(radio->dev, "From user: \"%s\"\n", radio->write_buf);
1073 
1074 	radio->write_buf[0] = WL1273_RDS_DATA_SET;
1075 	core->write_data(core, radio->write_buf, val + 1);
1076 
1077 	r = val;
1078 out:
1079 	mutex_unlock(&core->lock);
1080 
1081 	return r;
1082 }
1083 
wl1273_fm_fops_poll(struct file * file,struct poll_table_struct * pts)1084 static __poll_t wl1273_fm_fops_poll(struct file *file,
1085 					struct poll_table_struct *pts)
1086 {
1087 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1088 	struct wl1273_core *core = radio->core;
1089 
1090 	if (radio->owner && radio->owner != file)
1091 		return EPOLLERR;
1092 
1093 	radio->owner = file;
1094 
1095 	if (core->mode == WL1273_MODE_RX) {
1096 		poll_wait(file, &radio->read_queue, pts);
1097 
1098 		if (radio->rd_index != radio->wr_index)
1099 			return EPOLLIN | EPOLLRDNORM;
1100 
1101 	} else if (core->mode == WL1273_MODE_TX) {
1102 		return EPOLLOUT | EPOLLWRNORM;
1103 	}
1104 
1105 	return 0;
1106 }
1107 
wl1273_fm_fops_open(struct file * file)1108 static int wl1273_fm_fops_open(struct file *file)
1109 {
1110 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1111 	struct wl1273_core *core = radio->core;
1112 	int r = 0;
1113 
1114 	dev_dbg(radio->dev, "%s\n", __func__);
1115 
1116 	if (core->mode == WL1273_MODE_RX && radio->rds_on &&
1117 	    !radio->rds_users) {
1118 		dev_dbg(radio->dev, "%s: Mode: %d\n", __func__, core->mode);
1119 
1120 		if (mutex_lock_interruptible(&core->lock))
1121 			return -EINTR;
1122 
1123 		radio->irq_flags |= WL1273_RDS_EVENT;
1124 
1125 		r = core->write(core, WL1273_INT_MASK_SET,
1126 				radio->irq_flags);
1127 		if (r) {
1128 			mutex_unlock(&core->lock);
1129 			goto out;
1130 		}
1131 
1132 		radio->rds_users++;
1133 
1134 		mutex_unlock(&core->lock);
1135 	}
1136 out:
1137 	return r;
1138 }
1139 
wl1273_fm_fops_release(struct file * file)1140 static int wl1273_fm_fops_release(struct file *file)
1141 {
1142 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1143 	struct wl1273_core *core = radio->core;
1144 	int r = 0;
1145 
1146 	dev_dbg(radio->dev, "%s\n", __func__);
1147 
1148 	if (radio->rds_users > 0) {
1149 		radio->rds_users--;
1150 		if (radio->rds_users == 0) {
1151 			mutex_lock(&core->lock);
1152 
1153 			radio->irq_flags &= ~WL1273_RDS_EVENT;
1154 
1155 			if (core->mode == WL1273_MODE_RX) {
1156 				r = core->write(core,
1157 						WL1273_INT_MASK_SET,
1158 						radio->irq_flags);
1159 				if (r) {
1160 					mutex_unlock(&core->lock);
1161 					goto out;
1162 				}
1163 			}
1164 			mutex_unlock(&core->lock);
1165 		}
1166 	}
1167 
1168 	if (file == radio->owner)
1169 		radio->owner = NULL;
1170 out:
1171 	return r;
1172 }
1173 
wl1273_fm_fops_read(struct file * file,char __user * buf,size_t count,loff_t * ppos)1174 static ssize_t wl1273_fm_fops_read(struct file *file, char __user *buf,
1175 				   size_t count, loff_t *ppos)
1176 {
1177 	int r = 0;
1178 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1179 	struct wl1273_core *core = radio->core;
1180 	unsigned int block_count = 0;
1181 	u16 val;
1182 
1183 	dev_dbg(radio->dev, "%s\n", __func__);
1184 
1185 	if (core->mode != WL1273_MODE_RX)
1186 		return 0;
1187 
1188 	if (radio->rds_users == 0) {
1189 		dev_warn(radio->dev, "%s: RDS not on.\n", __func__);
1190 		return 0;
1191 	}
1192 
1193 	if (mutex_lock_interruptible(&core->lock))
1194 		return -EINTR;
1195 
1196 	/*
1197 	 * Multiple processes can open the device, but only
1198 	 * one at a time gets read access.
1199 	 */
1200 	if (radio->owner && radio->owner != file) {
1201 		r = -EBUSY;
1202 		goto out;
1203 	}
1204 	radio->owner = file;
1205 
1206 	r = core->read(core, WL1273_RDS_SYNC_GET, &val);
1207 	if (r) {
1208 		dev_err(radio->dev, "%s: Get RDS_SYNC fails.\n", __func__);
1209 		goto out;
1210 	} else if (val == 0) {
1211 		dev_info(radio->dev, "RDS_SYNC: Not synchronized\n");
1212 		r = -ENODATA;
1213 		goto out;
1214 	}
1215 
1216 	/* block if no new data available */
1217 	while (radio->wr_index == radio->rd_index) {
1218 		if (file->f_flags & O_NONBLOCK) {
1219 			r = -EWOULDBLOCK;
1220 			goto out;
1221 		}
1222 
1223 		dev_dbg(radio->dev, "%s: Wait for RDS data.\n", __func__);
1224 		if (wait_event_interruptible(radio->read_queue,
1225 					     radio->wr_index !=
1226 					     radio->rd_index) < 0) {
1227 			r = -EINTR;
1228 			goto out;
1229 		}
1230 	}
1231 
1232 	/* calculate block count from byte count */
1233 	count /= RDS_BLOCK_SIZE;
1234 
1235 	/* copy RDS blocks from the internal buffer and to user buffer */
1236 	while (block_count < count) {
1237 		if (radio->rd_index == radio->wr_index)
1238 			break;
1239 
1240 		/* always transfer complete RDS blocks */
1241 		if (copy_to_user(buf, &radio->buffer[radio->rd_index],
1242 				 RDS_BLOCK_SIZE))
1243 			break;
1244 
1245 		/* increment and wrap the read pointer */
1246 		radio->rd_index += RDS_BLOCK_SIZE;
1247 		if (radio->rd_index >= radio->buf_size)
1248 			radio->rd_index = 0;
1249 
1250 		/* increment counters */
1251 		block_count++;
1252 		buf += RDS_BLOCK_SIZE;
1253 		r += RDS_BLOCK_SIZE;
1254 	}
1255 
1256 out:
1257 	dev_dbg(radio->dev, "%s: exit\n", __func__);
1258 	mutex_unlock(&core->lock);
1259 
1260 	return r;
1261 }
1262 
1263 static const struct v4l2_file_operations wl1273_fops = {
1264 	.owner		= THIS_MODULE,
1265 	.read		= wl1273_fm_fops_read,
1266 	.write		= wl1273_fm_fops_write,
1267 	.poll		= wl1273_fm_fops_poll,
1268 	.unlocked_ioctl	= video_ioctl2,
1269 	.open		= wl1273_fm_fops_open,
1270 	.release	= wl1273_fm_fops_release,
1271 };
1272 
wl1273_fm_vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * capability)1273 static int wl1273_fm_vidioc_querycap(struct file *file, void *priv,
1274 				     struct v4l2_capability *capability)
1275 {
1276 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1277 
1278 	dev_dbg(radio->dev, "%s\n", __func__);
1279 
1280 	strscpy(capability->driver, WL1273_FM_DRIVER_NAME,
1281 		sizeof(capability->driver));
1282 	strscpy(capability->card, "TI Wl1273 FM Radio",
1283 		sizeof(capability->card));
1284 	strscpy(capability->bus_info, radio->bus_type,
1285 		sizeof(capability->bus_info));
1286 	return 0;
1287 }
1288 
wl1273_fm_vidioc_g_input(struct file * file,void * priv,unsigned int * i)1289 static int wl1273_fm_vidioc_g_input(struct file *file, void *priv,
1290 				    unsigned int *i)
1291 {
1292 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1293 
1294 	dev_dbg(radio->dev, "%s\n", __func__);
1295 
1296 	*i = 0;
1297 
1298 	return 0;
1299 }
1300 
wl1273_fm_vidioc_s_input(struct file * file,void * priv,unsigned int i)1301 static int wl1273_fm_vidioc_s_input(struct file *file, void *priv,
1302 				    unsigned int i)
1303 {
1304 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1305 
1306 	dev_dbg(radio->dev, "%s\n", __func__);
1307 
1308 	if (i != 0)
1309 		return -EINVAL;
1310 
1311 	return 0;
1312 }
1313 
1314 /**
1315  * wl1273_fm_set_tx_power() -	Set the transmission power value.
1316  * @radio:			A pointer to the device struct.
1317  * @power:			The new power value.
1318  */
wl1273_fm_set_tx_power(struct wl1273_device * radio,u16 power)1319 static int wl1273_fm_set_tx_power(struct wl1273_device *radio, u16 power)
1320 {
1321 	struct wl1273_core *core = radio->core;
1322 	int r;
1323 
1324 	if (core->mode == WL1273_MODE_OFF ||
1325 	    core->mode == WL1273_MODE_SUSPENDED)
1326 		return -EPERM;
1327 
1328 	mutex_lock(&core->lock);
1329 
1330 	/* Convert the dBuV value to chip presentation */
1331 	r = core->write(core, WL1273_POWER_LEV_SET, 122 - power);
1332 	if (r)
1333 		goto out;
1334 
1335 	radio->tx_power = power;
1336 
1337 out:
1338 	mutex_unlock(&core->lock);
1339 	return r;
1340 }
1341 
1342 #define WL1273_SPACING_50kHz	1
1343 #define WL1273_SPACING_100kHz	2
1344 #define WL1273_SPACING_200kHz	4
1345 
wl1273_fm_tx_set_spacing(struct wl1273_device * radio,unsigned int spacing)1346 static int wl1273_fm_tx_set_spacing(struct wl1273_device *radio,
1347 				    unsigned int spacing)
1348 {
1349 	struct wl1273_core *core = radio->core;
1350 	int r;
1351 
1352 	if (spacing == 0) {
1353 		r = core->write(core, WL1273_SCAN_SPACING_SET,
1354 				WL1273_SPACING_100kHz);
1355 		radio->spacing = 100;
1356 	} else if (spacing - 50000 < 25000) {
1357 		r = core->write(core, WL1273_SCAN_SPACING_SET,
1358 				WL1273_SPACING_50kHz);
1359 		radio->spacing = 50;
1360 	} else if (spacing - 100000 < 50000) {
1361 		r = core->write(core, WL1273_SCAN_SPACING_SET,
1362 				WL1273_SPACING_100kHz);
1363 		radio->spacing = 100;
1364 	} else {
1365 		r = core->write(core, WL1273_SCAN_SPACING_SET,
1366 				WL1273_SPACING_200kHz);
1367 		radio->spacing = 200;
1368 	}
1369 
1370 	return r;
1371 }
1372 
wl1273_fm_g_volatile_ctrl(struct v4l2_ctrl * ctrl)1373 static int wl1273_fm_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
1374 {
1375 	struct wl1273_device *radio = ctrl->priv;
1376 	struct wl1273_core *core = radio->core;
1377 
1378 	dev_dbg(radio->dev, "%s\n", __func__);
1379 
1380 	if (mutex_lock_interruptible(&core->lock))
1381 		return -EINTR;
1382 
1383 	switch (ctrl->id) {
1384 	case  V4L2_CID_TUNE_ANTENNA_CAPACITOR:
1385 		ctrl->val = wl1273_fm_get_tx_ctune(radio);
1386 		break;
1387 
1388 	default:
1389 		dev_warn(radio->dev, "%s: Unknown IOCTL: %d\n",
1390 			 __func__, ctrl->id);
1391 		break;
1392 	}
1393 
1394 	mutex_unlock(&core->lock);
1395 
1396 	return 0;
1397 }
1398 
1399 #define WL1273_MUTE_SOFT_ENABLE    (1 << 0)
1400 #define WL1273_MUTE_AC             (1 << 1)
1401 #define WL1273_MUTE_HARD_LEFT      (1 << 2)
1402 #define WL1273_MUTE_HARD_RIGHT     (1 << 3)
1403 #define WL1273_MUTE_SOFT_FORCE     (1 << 4)
1404 
to_radio(struct v4l2_ctrl * ctrl)1405 static inline struct wl1273_device *to_radio(struct v4l2_ctrl *ctrl)
1406 {
1407 	return container_of(ctrl->handler, struct wl1273_device, ctrl_handler);
1408 }
1409 
wl1273_fm_vidioc_s_ctrl(struct v4l2_ctrl * ctrl)1410 static int wl1273_fm_vidioc_s_ctrl(struct v4l2_ctrl *ctrl)
1411 {
1412 	struct wl1273_device *radio = to_radio(ctrl);
1413 	struct wl1273_core *core = radio->core;
1414 	int r = 0;
1415 
1416 	dev_dbg(radio->dev, "%s\n", __func__);
1417 
1418 	switch (ctrl->id) {
1419 	case V4L2_CID_AUDIO_MUTE:
1420 		if (mutex_lock_interruptible(&core->lock))
1421 			return -EINTR;
1422 
1423 		if (core->mode == WL1273_MODE_RX && ctrl->val)
1424 			r = core->write(core,
1425 					WL1273_MUTE_STATUS_SET,
1426 					WL1273_MUTE_HARD_LEFT |
1427 					WL1273_MUTE_HARD_RIGHT);
1428 		else if (core->mode == WL1273_MODE_RX)
1429 			r = core->write(core,
1430 					WL1273_MUTE_STATUS_SET, 0x0);
1431 		else if (core->mode == WL1273_MODE_TX && ctrl->val)
1432 			r = core->write(core, WL1273_MUTE, 1);
1433 		else if (core->mode == WL1273_MODE_TX)
1434 			r = core->write(core, WL1273_MUTE, 0);
1435 
1436 		mutex_unlock(&core->lock);
1437 		break;
1438 
1439 	case V4L2_CID_AUDIO_VOLUME:
1440 		if (ctrl->val == 0)
1441 			r = wl1273_fm_set_mode(radio, WL1273_MODE_OFF);
1442 		else
1443 			r =  core->set_volume(core, core->volume);
1444 		break;
1445 
1446 	case V4L2_CID_TUNE_PREEMPHASIS:
1447 		r = wl1273_fm_set_preemphasis(radio, ctrl->val);
1448 		break;
1449 
1450 	case V4L2_CID_TUNE_POWER_LEVEL:
1451 		r = wl1273_fm_set_tx_power(radio, ctrl->val);
1452 		break;
1453 
1454 	default:
1455 		dev_warn(radio->dev, "%s: Unknown IOCTL: %d\n",
1456 			 __func__, ctrl->id);
1457 		break;
1458 	}
1459 
1460 	dev_dbg(radio->dev, "%s\n", __func__);
1461 	return r;
1462 }
1463 
wl1273_fm_vidioc_g_audio(struct file * file,void * priv,struct v4l2_audio * audio)1464 static int wl1273_fm_vidioc_g_audio(struct file *file, void *priv,
1465 				    struct v4l2_audio *audio)
1466 {
1467 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1468 
1469 	dev_dbg(radio->dev, "%s\n", __func__);
1470 
1471 	if (audio->index > 1)
1472 		return -EINVAL;
1473 
1474 	strscpy(audio->name, "Radio", sizeof(audio->name));
1475 	audio->capability = V4L2_AUDCAP_STEREO;
1476 
1477 	return 0;
1478 }
1479 
wl1273_fm_vidioc_s_audio(struct file * file,void * priv,const struct v4l2_audio * audio)1480 static int wl1273_fm_vidioc_s_audio(struct file *file, void *priv,
1481 				    const struct v4l2_audio *audio)
1482 {
1483 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1484 
1485 	dev_dbg(radio->dev, "%s\n", __func__);
1486 
1487 	if (audio->index != 0)
1488 		return -EINVAL;
1489 
1490 	return 0;
1491 }
1492 
1493 #define WL1273_RDS_NOT_SYNCHRONIZED 0
1494 #define WL1273_RDS_SYNCHRONIZED 1
1495 
wl1273_fm_vidioc_g_tuner(struct file * file,void * priv,struct v4l2_tuner * tuner)1496 static int wl1273_fm_vidioc_g_tuner(struct file *file, void *priv,
1497 				    struct v4l2_tuner *tuner)
1498 {
1499 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1500 	struct wl1273_core *core = radio->core;
1501 	u16 val;
1502 	int r;
1503 
1504 	dev_dbg(radio->dev, "%s\n", __func__);
1505 
1506 	if (tuner->index > 0)
1507 		return -EINVAL;
1508 
1509 	strscpy(tuner->name, WL1273_FM_DRIVER_NAME, sizeof(tuner->name));
1510 	tuner->type = V4L2_TUNER_RADIO;
1511 
1512 	tuner->rangelow	= WL1273_FREQ(WL1273_BAND_JAPAN_LOW);
1513 	tuner->rangehigh = WL1273_FREQ(WL1273_BAND_OTHER_HIGH);
1514 
1515 	tuner->capability = V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_RDS |
1516 		V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS_BLOCK_IO |
1517 		V4L2_TUNER_CAP_HWSEEK_BOUNDED | V4L2_TUNER_CAP_HWSEEK_WRAP;
1518 
1519 	if (radio->stereo)
1520 		tuner->audmode = V4L2_TUNER_MODE_STEREO;
1521 	else
1522 		tuner->audmode = V4L2_TUNER_MODE_MONO;
1523 
1524 	if (core->mode != WL1273_MODE_RX)
1525 		return 0;
1526 
1527 	if (mutex_lock_interruptible(&core->lock))
1528 		return -EINTR;
1529 
1530 	r = core->read(core, WL1273_STEREO_GET, &val);
1531 	if (r)
1532 		goto out;
1533 
1534 	if (val == 1)
1535 		tuner->rxsubchans = V4L2_TUNER_SUB_STEREO;
1536 	else
1537 		tuner->rxsubchans = V4L2_TUNER_SUB_MONO;
1538 
1539 	r = core->read(core, WL1273_RSSI_LVL_GET, &val);
1540 	if (r)
1541 		goto out;
1542 
1543 	tuner->signal = (s16) val;
1544 	dev_dbg(radio->dev, "Signal: %d\n", tuner->signal);
1545 
1546 	tuner->afc = 0;
1547 
1548 	r = core->read(core, WL1273_RDS_SYNC_GET, &val);
1549 	if (r)
1550 		goto out;
1551 
1552 	if (val == WL1273_RDS_SYNCHRONIZED)
1553 		tuner->rxsubchans |= V4L2_TUNER_SUB_RDS;
1554 out:
1555 	mutex_unlock(&core->lock);
1556 
1557 	return r;
1558 }
1559 
wl1273_fm_vidioc_s_tuner(struct file * file,void * priv,const struct v4l2_tuner * tuner)1560 static int wl1273_fm_vidioc_s_tuner(struct file *file, void *priv,
1561 				    const struct v4l2_tuner *tuner)
1562 {
1563 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1564 	struct wl1273_core *core = radio->core;
1565 	int r = 0;
1566 
1567 	dev_dbg(radio->dev, "%s\n", __func__);
1568 	dev_dbg(radio->dev, "tuner->index: %d\n", tuner->index);
1569 	dev_dbg(radio->dev, "tuner->name: %s\n", tuner->name);
1570 	dev_dbg(radio->dev, "tuner->capability: 0x%04x\n", tuner->capability);
1571 	dev_dbg(radio->dev, "tuner->rxsubchans: 0x%04x\n", tuner->rxsubchans);
1572 	dev_dbg(radio->dev, "tuner->rangelow: %d\n", tuner->rangelow);
1573 	dev_dbg(radio->dev, "tuner->rangehigh: %d\n", tuner->rangehigh);
1574 
1575 	if (tuner->index > 0)
1576 		return -EINVAL;
1577 
1578 	if (mutex_lock_interruptible(&core->lock))
1579 		return -EINTR;
1580 
1581 	r = wl1273_fm_set_mode(radio, WL1273_MODE_RX);
1582 	if (r)
1583 		goto out;
1584 
1585 	if (tuner->rxsubchans & V4L2_TUNER_SUB_RDS)
1586 		r = wl1273_fm_set_rds(radio, WL1273_RDS_ON);
1587 	else
1588 		r = wl1273_fm_set_rds(radio, WL1273_RDS_OFF);
1589 
1590 	if (r)
1591 		dev_warn(radio->dev, "%s: RDS fails: %d\n", __func__, r);
1592 
1593 	if (tuner->audmode == V4L2_TUNER_MODE_MONO) {
1594 		r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO);
1595 		if (r < 0) {
1596 			dev_warn(radio->dev, "%s: MOST_MODE fails: %d\n",
1597 				 __func__, r);
1598 			goto out;
1599 		}
1600 		radio->stereo = false;
1601 	} else if (tuner->audmode == V4L2_TUNER_MODE_STEREO) {
1602 		r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO);
1603 		if (r < 0) {
1604 			dev_warn(radio->dev, "%s: MOST_MODE fails: %d\n",
1605 				 __func__, r);
1606 			goto out;
1607 		}
1608 		radio->stereo = true;
1609 	} else {
1610 		dev_err(radio->dev, "%s: tuner->audmode: %d\n",
1611 			 __func__, tuner->audmode);
1612 		r = -EINVAL;
1613 		goto out;
1614 	}
1615 
1616 out:
1617 	mutex_unlock(&core->lock);
1618 
1619 	return r;
1620 }
1621 
wl1273_fm_vidioc_g_frequency(struct file * file,void * priv,struct v4l2_frequency * freq)1622 static int wl1273_fm_vidioc_g_frequency(struct file *file, void *priv,
1623 					struct v4l2_frequency *freq)
1624 {
1625 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1626 	struct wl1273_core *core = radio->core;
1627 
1628 	dev_dbg(radio->dev, "%s\n", __func__);
1629 
1630 	if (mutex_lock_interruptible(&core->lock))
1631 		return -EINTR;
1632 
1633 	freq->type = V4L2_TUNER_RADIO;
1634 	freq->frequency = WL1273_FREQ(wl1273_fm_get_freq(radio));
1635 
1636 	mutex_unlock(&core->lock);
1637 
1638 	return 0;
1639 }
1640 
wl1273_fm_vidioc_s_frequency(struct file * file,void * priv,const struct v4l2_frequency * freq)1641 static int wl1273_fm_vidioc_s_frequency(struct file *file, void *priv,
1642 					const struct v4l2_frequency *freq)
1643 {
1644 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1645 	struct wl1273_core *core = radio->core;
1646 	int r;
1647 
1648 	dev_dbg(radio->dev, "%s: %d\n", __func__, freq->frequency);
1649 
1650 	if (freq->type != V4L2_TUNER_RADIO) {
1651 		dev_dbg(radio->dev,
1652 			"freq->type != V4L2_TUNER_RADIO: %d\n", freq->type);
1653 		return -EINVAL;
1654 	}
1655 
1656 	if (mutex_lock_interruptible(&core->lock))
1657 		return -EINTR;
1658 
1659 	if (core->mode == WL1273_MODE_RX) {
1660 		dev_dbg(radio->dev, "freq: %d\n", freq->frequency);
1661 
1662 		r = wl1273_fm_set_rx_freq(radio,
1663 					  WL1273_INV_FREQ(freq->frequency));
1664 		if (r)
1665 			dev_warn(radio->dev, WL1273_FM_DRIVER_NAME
1666 				 ": set frequency failed with %d\n", r);
1667 	} else {
1668 		r = wl1273_fm_set_tx_freq(radio,
1669 					  WL1273_INV_FREQ(freq->frequency));
1670 		if (r)
1671 			dev_warn(radio->dev, WL1273_FM_DRIVER_NAME
1672 				 ": set frequency failed with %d\n", r);
1673 	}
1674 
1675 	mutex_unlock(&core->lock);
1676 
1677 	dev_dbg(radio->dev, "wl1273_vidioc_s_frequency: DONE\n");
1678 	return r;
1679 }
1680 
1681 #define WL1273_DEFAULT_SEEK_LEVEL	7
1682 
wl1273_fm_vidioc_s_hw_freq_seek(struct file * file,void * priv,const struct v4l2_hw_freq_seek * seek)1683 static int wl1273_fm_vidioc_s_hw_freq_seek(struct file *file, void *priv,
1684 					   const struct v4l2_hw_freq_seek *seek)
1685 {
1686 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1687 	struct wl1273_core *core = radio->core;
1688 	int r;
1689 
1690 	dev_dbg(radio->dev, "%s\n", __func__);
1691 
1692 	if (seek->tuner != 0 || seek->type != V4L2_TUNER_RADIO)
1693 		return -EINVAL;
1694 
1695 	if (file->f_flags & O_NONBLOCK)
1696 		return -EWOULDBLOCK;
1697 
1698 	if (mutex_lock_interruptible(&core->lock))
1699 		return -EINTR;
1700 
1701 	r = wl1273_fm_set_mode(radio, WL1273_MODE_RX);
1702 	if (r)
1703 		goto out;
1704 
1705 	r = wl1273_fm_tx_set_spacing(radio, seek->spacing);
1706 	if (r)
1707 		dev_warn(radio->dev, "HW seek failed: %d\n", r);
1708 
1709 	r = wl1273_fm_set_seek(radio, seek->wrap_around, seek->seek_upward,
1710 			       WL1273_DEFAULT_SEEK_LEVEL);
1711 	if (r)
1712 		dev_warn(radio->dev, "HW seek failed: %d\n", r);
1713 
1714 out:
1715 	mutex_unlock(&core->lock);
1716 	return r;
1717 }
1718 
wl1273_fm_vidioc_s_modulator(struct file * file,void * priv,const struct v4l2_modulator * modulator)1719 static int wl1273_fm_vidioc_s_modulator(struct file *file, void *priv,
1720 					const struct v4l2_modulator *modulator)
1721 {
1722 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1723 	struct wl1273_core *core = radio->core;
1724 	int r = 0;
1725 
1726 	dev_dbg(radio->dev, "%s\n", __func__);
1727 
1728 	if (modulator->index > 0)
1729 		return -EINVAL;
1730 
1731 	if (mutex_lock_interruptible(&core->lock))
1732 		return -EINTR;
1733 
1734 	r = wl1273_fm_set_mode(radio, WL1273_MODE_TX);
1735 	if (r)
1736 		goto out;
1737 
1738 	if (modulator->txsubchans & V4L2_TUNER_SUB_RDS)
1739 		r = wl1273_fm_set_rds(radio, WL1273_RDS_ON);
1740 	else
1741 		r = wl1273_fm_set_rds(radio, WL1273_RDS_OFF);
1742 
1743 	if (modulator->txsubchans & V4L2_TUNER_SUB_MONO)
1744 		r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO);
1745 	else
1746 		r = core->write(core, WL1273_MONO_SET,
1747 				WL1273_RX_STEREO);
1748 	if (r < 0)
1749 		dev_warn(radio->dev, WL1273_FM_DRIVER_NAME
1750 			 "MONO_SET fails: %d\n", r);
1751 out:
1752 	mutex_unlock(&core->lock);
1753 
1754 	return r;
1755 }
1756 
wl1273_fm_vidioc_g_modulator(struct file * file,void * priv,struct v4l2_modulator * modulator)1757 static int wl1273_fm_vidioc_g_modulator(struct file *file, void *priv,
1758 					struct v4l2_modulator *modulator)
1759 {
1760 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1761 	struct wl1273_core *core = radio->core;
1762 	u16 val;
1763 	int r;
1764 
1765 	dev_dbg(radio->dev, "%s\n", __func__);
1766 
1767 	strscpy(modulator->name, WL1273_FM_DRIVER_NAME,
1768 		sizeof(modulator->name));
1769 
1770 	modulator->rangelow = WL1273_FREQ(WL1273_BAND_JAPAN_LOW);
1771 	modulator->rangehigh = WL1273_FREQ(WL1273_BAND_OTHER_HIGH);
1772 
1773 	modulator->capability =  V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_RDS |
1774 		V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_RDS_BLOCK_IO;
1775 
1776 	if (core->mode != WL1273_MODE_TX)
1777 		return 0;
1778 
1779 	if (mutex_lock_interruptible(&core->lock))
1780 		return -EINTR;
1781 
1782 	r = core->read(core, WL1273_MONO_SET, &val);
1783 	if (r)
1784 		goto out;
1785 
1786 	if (val == WL1273_TX_STEREO)
1787 		modulator->txsubchans = V4L2_TUNER_SUB_STEREO;
1788 	else
1789 		modulator->txsubchans = V4L2_TUNER_SUB_MONO;
1790 
1791 	if (radio->rds_on)
1792 		modulator->txsubchans |= V4L2_TUNER_SUB_RDS;
1793 out:
1794 	mutex_unlock(&core->lock);
1795 
1796 	return 0;
1797 }
1798 
wl1273_fm_vidioc_log_status(struct file * file,void * priv)1799 static int wl1273_fm_vidioc_log_status(struct file *file, void *priv)
1800 {
1801 	struct wl1273_device *radio = video_get_drvdata(video_devdata(file));
1802 	struct wl1273_core *core = radio->core;
1803 	struct device *dev = radio->dev;
1804 	u16 val;
1805 	int r;
1806 
1807 	dev_info(dev, DRIVER_DESC);
1808 
1809 	if (core->mode == WL1273_MODE_OFF) {
1810 		dev_info(dev, "Mode: Off\n");
1811 		return 0;
1812 	}
1813 
1814 	if (core->mode == WL1273_MODE_SUSPENDED) {
1815 		dev_info(dev, "Mode: Suspended\n");
1816 		return 0;
1817 	}
1818 
1819 	r = core->read(core, WL1273_ASIC_ID_GET, &val);
1820 	if (r)
1821 		dev_err(dev, "%s: Get ASIC_ID fails.\n", __func__);
1822 	else
1823 		dev_info(dev, "ASIC_ID: 0x%04x\n", val);
1824 
1825 	r = core->read(core, WL1273_ASIC_VER_GET, &val);
1826 	if (r)
1827 		dev_err(dev, "%s: Get ASIC_VER fails.\n", __func__);
1828 	else
1829 		dev_info(dev, "ASIC Version: 0x%04x\n", val);
1830 
1831 	r = core->read(core, WL1273_FIRM_VER_GET, &val);
1832 	if (r)
1833 		dev_err(dev, "%s: Get FIRM_VER fails.\n", __func__);
1834 	else
1835 		dev_info(dev, "FW version: %d(0x%04x)\n", val, val);
1836 
1837 	r = core->read(core, WL1273_BAND_SET, &val);
1838 	if (r)
1839 		dev_err(dev, "%s: Get BAND fails.\n", __func__);
1840 	else
1841 		dev_info(dev, "BAND: %d\n", val);
1842 
1843 	if (core->mode == WL1273_MODE_TX) {
1844 		r = core->read(core, WL1273_PUPD_SET, &val);
1845 		if (r)
1846 			dev_err(dev, "%s: Get PUPD fails.\n", __func__);
1847 		else
1848 			dev_info(dev, "PUPD: 0x%04x\n", val);
1849 
1850 		r = core->read(core, WL1273_CHANL_SET, &val);
1851 		if (r)
1852 			dev_err(dev, "%s: Get CHANL fails.\n", __func__);
1853 		else
1854 			dev_info(dev, "Tx frequency: %dkHz\n", val*10);
1855 	} else if (core->mode == WL1273_MODE_RX) {
1856 		int bf = radio->rangelow;
1857 
1858 		r = core->read(core, WL1273_FREQ_SET, &val);
1859 		if (r)
1860 			dev_err(dev, "%s: Get FREQ fails.\n", __func__);
1861 		else
1862 			dev_info(dev, "RX Frequency: %dkHz\n", bf + val*50);
1863 
1864 		r = core->read(core, WL1273_MOST_MODE_SET, &val);
1865 		if (r)
1866 			dev_err(dev, "%s: Get MOST_MODE fails.\n",
1867 				__func__);
1868 		else if (val == 0)
1869 			dev_info(dev, "MOST_MODE: Stereo according to blend\n");
1870 		else if (val == 1)
1871 			dev_info(dev, "MOST_MODE: Force mono output\n");
1872 		else
1873 			dev_info(dev, "MOST_MODE: Unexpected value: %d\n", val);
1874 
1875 		r = core->read(core, WL1273_MOST_BLEND_SET, &val);
1876 		if (r)
1877 			dev_err(dev, "%s: Get MOST_BLEND fails.\n", __func__);
1878 		else if (val == 0)
1879 			dev_info(dev,
1880 				 "MOST_BLEND: Switched blend & hysteresis.\n");
1881 		else if (val == 1)
1882 			dev_info(dev, "MOST_BLEND: Soft blend.\n");
1883 		else
1884 			dev_info(dev, "MOST_BLEND: Unexpected val: %d\n", val);
1885 
1886 		r = core->read(core, WL1273_STEREO_GET, &val);
1887 		if (r)
1888 			dev_err(dev, "%s: Get STEREO fails.\n", __func__);
1889 		else if (val == 0)
1890 			dev_info(dev, "STEREO: Not detected\n");
1891 		else if (val == 1)
1892 			dev_info(dev, "STEREO: Detected\n");
1893 		else
1894 			dev_info(dev, "STEREO: Unexpected value: %d\n", val);
1895 
1896 		r = core->read(core, WL1273_RSSI_LVL_GET, &val);
1897 		if (r)
1898 			dev_err(dev, "%s: Get RSSI_LVL fails.\n", __func__);
1899 		else
1900 			dev_info(dev, "RX signal strength: %d\n", (s16) val);
1901 
1902 		r = core->read(core, WL1273_POWER_SET, &val);
1903 		if (r)
1904 			dev_err(dev, "%s: Get POWER fails.\n", __func__);
1905 		else
1906 			dev_info(dev, "POWER: 0x%04x\n", val);
1907 
1908 		r = core->read(core, WL1273_INT_MASK_SET, &val);
1909 		if (r)
1910 			dev_err(dev, "%s: Get INT_MASK fails.\n", __func__);
1911 		else
1912 			dev_info(dev, "INT_MASK: 0x%04x\n", val);
1913 
1914 		r = core->read(core, WL1273_RDS_SYNC_GET, &val);
1915 		if (r)
1916 			dev_err(dev, "%s: Get RDS_SYNC fails.\n",
1917 				__func__);
1918 		else if (val == 0)
1919 			dev_info(dev, "RDS_SYNC: Not synchronized\n");
1920 
1921 		else if (val == 1)
1922 			dev_info(dev, "RDS_SYNC: Synchronized\n");
1923 		else
1924 			dev_info(dev, "RDS_SYNC: Unexpected value: %d\n", val);
1925 
1926 		r = core->read(core, WL1273_I2S_MODE_CONFIG_SET, &val);
1927 		if (r)
1928 			dev_err(dev, "%s: Get I2S_MODE_CONFIG fails.\n",
1929 				__func__);
1930 		else
1931 			dev_info(dev, "I2S_MODE_CONFIG: 0x%04x\n", val);
1932 
1933 		r = core->read(core, WL1273_VOLUME_SET, &val);
1934 		if (r)
1935 			dev_err(dev, "%s: Get VOLUME fails.\n", __func__);
1936 		else
1937 			dev_info(dev, "VOLUME: 0x%04x\n", val);
1938 	}
1939 
1940 	return 0;
1941 }
1942 
wl1273_vdev_release(struct video_device * dev)1943 static void wl1273_vdev_release(struct video_device *dev)
1944 {
1945 }
1946 
1947 static const struct v4l2_ctrl_ops wl1273_ctrl_ops = {
1948 	.s_ctrl = wl1273_fm_vidioc_s_ctrl,
1949 	.g_volatile_ctrl = wl1273_fm_g_volatile_ctrl,
1950 };
1951 
1952 static const struct v4l2_ioctl_ops wl1273_ioctl_ops = {
1953 	.vidioc_querycap	= wl1273_fm_vidioc_querycap,
1954 	.vidioc_g_input		= wl1273_fm_vidioc_g_input,
1955 	.vidioc_s_input		= wl1273_fm_vidioc_s_input,
1956 	.vidioc_g_audio		= wl1273_fm_vidioc_g_audio,
1957 	.vidioc_s_audio		= wl1273_fm_vidioc_s_audio,
1958 	.vidioc_g_tuner		= wl1273_fm_vidioc_g_tuner,
1959 	.vidioc_s_tuner		= wl1273_fm_vidioc_s_tuner,
1960 	.vidioc_g_frequency	= wl1273_fm_vidioc_g_frequency,
1961 	.vidioc_s_frequency	= wl1273_fm_vidioc_s_frequency,
1962 	.vidioc_s_hw_freq_seek	= wl1273_fm_vidioc_s_hw_freq_seek,
1963 	.vidioc_g_modulator	= wl1273_fm_vidioc_g_modulator,
1964 	.vidioc_s_modulator	= wl1273_fm_vidioc_s_modulator,
1965 	.vidioc_log_status      = wl1273_fm_vidioc_log_status,
1966 };
1967 
1968 static const struct video_device wl1273_viddev_template = {
1969 	.fops			= &wl1273_fops,
1970 	.ioctl_ops		= &wl1273_ioctl_ops,
1971 	.name			= WL1273_FM_DRIVER_NAME,
1972 	.release		= wl1273_vdev_release,
1973 	.vfl_dir		= VFL_DIR_TX,
1974 	.device_caps		= V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_TUNER |
1975 				  V4L2_CAP_RADIO | V4L2_CAP_AUDIO |
1976 				  V4L2_CAP_RDS_CAPTURE | V4L2_CAP_MODULATOR |
1977 				  V4L2_CAP_RDS_OUTPUT,
1978 };
1979 
wl1273_fm_radio_remove(struct platform_device * pdev)1980 static void wl1273_fm_radio_remove(struct platform_device *pdev)
1981 {
1982 	struct wl1273_device *radio = platform_get_drvdata(pdev);
1983 	struct wl1273_core *core = radio->core;
1984 
1985 	dev_info(&pdev->dev, "%s.\n", __func__);
1986 
1987 	free_irq(core->client->irq, radio);
1988 	core->pdata->free_resources();
1989 
1990 	v4l2_ctrl_handler_free(&radio->ctrl_handler);
1991 	video_unregister_device(&radio->videodev);
1992 	v4l2_device_unregister(&radio->v4l2dev);
1993 }
1994 
wl1273_fm_radio_probe(struct platform_device * pdev)1995 static int wl1273_fm_radio_probe(struct platform_device *pdev)
1996 {
1997 	struct wl1273_core **core = pdev->dev.platform_data;
1998 	struct wl1273_device *radio;
1999 	struct v4l2_ctrl *ctrl;
2000 	int r = 0;
2001 
2002 	pr_debug("%s\n", __func__);
2003 
2004 	if (!core) {
2005 		dev_err(&pdev->dev, "No platform data.\n");
2006 		r = -EINVAL;
2007 		goto pdata_err;
2008 	}
2009 
2010 	radio = devm_kzalloc(&pdev->dev, sizeof(*radio), GFP_KERNEL);
2011 	if (!radio) {
2012 		r = -ENOMEM;
2013 		goto pdata_err;
2014 	}
2015 
2016 	/* RDS buffer allocation */
2017 	radio->buf_size = rds_buf * RDS_BLOCK_SIZE;
2018 	radio->buffer = devm_kzalloc(&pdev->dev, radio->buf_size, GFP_KERNEL);
2019 	if (!radio->buffer) {
2020 		pr_err("Cannot allocate memory for RDS buffer.\n");
2021 		r = -ENOMEM;
2022 		goto pdata_err;
2023 	}
2024 
2025 	radio->core = *core;
2026 	radio->irq_flags = WL1273_IRQ_MASK;
2027 	radio->dev = &radio->core->client->dev;
2028 	radio->rds_on = false;
2029 	radio->core->mode = WL1273_MODE_OFF;
2030 	radio->tx_power = 118;
2031 	radio->core->audio_mode = WL1273_AUDIO_ANALOG;
2032 	radio->band = WL1273_BAND_OTHER;
2033 	radio->core->i2s_mode = WL1273_I2S_DEF_MODE;
2034 	radio->core->channel_number = 2;
2035 	radio->core->volume = WL1273_DEFAULT_VOLUME;
2036 	radio->rx_frequency = WL1273_BAND_OTHER_LOW;
2037 	radio->tx_frequency = WL1273_BAND_OTHER_HIGH;
2038 	radio->rangelow = WL1273_BAND_OTHER_LOW;
2039 	radio->rangehigh = WL1273_BAND_OTHER_HIGH;
2040 	radio->stereo = true;
2041 	radio->bus_type = "I2C";
2042 
2043 	if (radio->core->pdata->request_resources) {
2044 		r = radio->core->pdata->request_resources(radio->core->client);
2045 		if (r) {
2046 			dev_err(radio->dev, WL1273_FM_DRIVER_NAME
2047 				": Cannot get platform data\n");
2048 			goto pdata_err;
2049 		}
2050 
2051 		dev_dbg(radio->dev, "irq: %d\n", radio->core->client->irq);
2052 
2053 		r = request_threaded_irq(radio->core->client->irq, NULL,
2054 					 wl1273_fm_irq_thread_handler,
2055 					 IRQF_ONESHOT | IRQF_TRIGGER_FALLING,
2056 					 "wl1273-fm", radio);
2057 		if (r < 0) {
2058 			dev_err(radio->dev, WL1273_FM_DRIVER_NAME
2059 				": Unable to register IRQ handler: %d\n", r);
2060 			goto err_request_irq;
2061 		}
2062 	} else {
2063 		dev_err(radio->dev, WL1273_FM_DRIVER_NAME ": Core WL1273 IRQ not configured");
2064 		r = -EINVAL;
2065 		goto pdata_err;
2066 	}
2067 
2068 	init_completion(&radio->busy);
2069 	init_waitqueue_head(&radio->read_queue);
2070 
2071 	radio->write_buf = devm_kzalloc(&pdev->dev, 256, GFP_KERNEL);
2072 	if (!radio->write_buf) {
2073 		r = -ENOMEM;
2074 		goto write_buf_err;
2075 	}
2076 
2077 	radio->dev = &pdev->dev;
2078 	radio->v4l2dev.ctrl_handler = &radio->ctrl_handler;
2079 	radio->rds_users = 0;
2080 
2081 	r = v4l2_device_register(&pdev->dev, &radio->v4l2dev);
2082 	if (r) {
2083 		dev_err(&pdev->dev, "Cannot register v4l2_device.\n");
2084 		goto write_buf_err;
2085 	}
2086 
2087 	/* V4L2 configuration */
2088 	radio->videodev = wl1273_viddev_template;
2089 
2090 	radio->videodev.v4l2_dev = &radio->v4l2dev;
2091 
2092 	v4l2_ctrl_handler_init(&radio->ctrl_handler, 6);
2093 
2094 	/* add in ascending ID order */
2095 	v4l2_ctrl_new_std(&radio->ctrl_handler, &wl1273_ctrl_ops,
2096 			  V4L2_CID_AUDIO_VOLUME, 0, WL1273_MAX_VOLUME, 1,
2097 			  WL1273_DEFAULT_VOLUME);
2098 
2099 	v4l2_ctrl_new_std(&radio->ctrl_handler, &wl1273_ctrl_ops,
2100 			  V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
2101 
2102 	v4l2_ctrl_new_std_menu(&radio->ctrl_handler, &wl1273_ctrl_ops,
2103 			       V4L2_CID_TUNE_PREEMPHASIS,
2104 			       V4L2_PREEMPHASIS_75_uS, 0x03,
2105 			       V4L2_PREEMPHASIS_50_uS);
2106 
2107 	v4l2_ctrl_new_std(&radio->ctrl_handler, &wl1273_ctrl_ops,
2108 			  V4L2_CID_TUNE_POWER_LEVEL, 91, 122, 1, 118);
2109 
2110 	ctrl = v4l2_ctrl_new_std(&radio->ctrl_handler, &wl1273_ctrl_ops,
2111 				 V4L2_CID_TUNE_ANTENNA_CAPACITOR,
2112 				 0, 255, 1, 255);
2113 	if (ctrl)
2114 		ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
2115 
2116 	if (radio->ctrl_handler.error) {
2117 		r = radio->ctrl_handler.error;
2118 		dev_err(&pdev->dev, "Ctrl handler error: %d\n", r);
2119 		goto handler_init_err;
2120 	}
2121 
2122 	video_set_drvdata(&radio->videodev, radio);
2123 	platform_set_drvdata(pdev, radio);
2124 
2125 	/* register video device */
2126 	r = video_register_device(&radio->videodev, VFL_TYPE_RADIO, radio_nr);
2127 	if (r) {
2128 		dev_err(&pdev->dev, WL1273_FM_DRIVER_NAME
2129 			": Could not register video device\n");
2130 		goto handler_init_err;
2131 	}
2132 
2133 	return 0;
2134 
2135 handler_init_err:
2136 	v4l2_ctrl_handler_free(&radio->ctrl_handler);
2137 	v4l2_device_unregister(&radio->v4l2dev);
2138 write_buf_err:
2139 	free_irq(radio->core->client->irq, radio);
2140 err_request_irq:
2141 	radio->core->pdata->free_resources();
2142 pdata_err:
2143 	return r;
2144 }
2145 
2146 static struct platform_driver wl1273_fm_radio_driver = {
2147 	.probe		= wl1273_fm_radio_probe,
2148 	.remove_new	= wl1273_fm_radio_remove,
2149 	.driver		= {
2150 		.name	= "wl1273_fm_radio",
2151 	},
2152 };
2153 
2154 module_platform_driver(wl1273_fm_radio_driver);
2155 
2156 MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
2157 MODULE_DESCRIPTION(DRIVER_DESC);
2158 MODULE_LICENSE("GPL");
2159 MODULE_ALIAS("platform:wl1273_fm_radio");
2160