2 * drivers/staging/media/radio-bcm2048.c
4 * Driver for I2C Broadcom BCM2048 FM Radio Receiver:
6 * Copyright (C) Nokia Corporation
7 * Contact: Eero Nurkkala <ext-eero.nurkkala@nokia.com>
9 * Copyright (C) Nils Faerber <nils.faerber@kernelconcepts.de>
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * version 2 as published by the Free Software Foundation.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
28 * Eero Nurkkala <ext-eero.nurkkala@nokia.com>
30 * - Initial implementation
31 * 2010-02-21 Nils Faerber <nils.faerber@kernelconcepts.de>
33 * - Add support for interrupt driven rds data reading
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/init.h>
39 #include <linux/version.h>
40 #include <linux/interrupt.h>
41 #include <linux/sysfs.h>
42 #include <linux/completion.h>
43 #include <linux/delay.h>
44 #include <linux/i2c.h>
45 #include <linux/videodev2.h>
46 #include <linux/mutex.h>
47 #include <linux/slab.h>
48 #include <media/v4l2-common.h>
49 #include <media/v4l2-ioctl.h>
50 #include "radio-bcm2048.h"
52 /* driver definitions */
53 #define BCM2048_DRIVER_AUTHOR "Eero Nurkkala <ext-eero.nurkkala@nokia.com>"
54 #define BCM2048_DRIVER_NAME BCM2048_NAME
55 #define BCM2048_DRIVER_VERSION KERNEL_VERSION(0, 0, 1)
56 #define BCM2048_DRIVER_CARD "Broadcom bcm2048 FM Radio Receiver"
57 #define BCM2048_DRIVER_DESC "I2C driver for BCM2048 FM Radio Receiver"
59 /* I2C Control Registers */
60 #define BCM2048_I2C_FM_RDS_SYSTEM 0x00
61 #define BCM2048_I2C_FM_CTRL 0x01
62 #define BCM2048_I2C_RDS_CTRL0 0x02
63 #define BCM2048_I2C_RDS_CTRL1 0x03
64 #define BCM2048_I2C_FM_AUDIO_PAUSE 0x04
65 #define BCM2048_I2C_FM_AUDIO_CTRL0 0x05
66 #define BCM2048_I2C_FM_AUDIO_CTRL1 0x06
67 #define BCM2048_I2C_FM_SEARCH_CTRL0 0x07
68 #define BCM2048_I2C_FM_SEARCH_CTRL1 0x08
69 #define BCM2048_I2C_FM_SEARCH_TUNE_MODE 0x09
70 #define BCM2048_I2C_FM_FREQ0 0x0a
71 #define BCM2048_I2C_FM_FREQ1 0x0b
72 #define BCM2048_I2C_FM_AF_FREQ0 0x0c
73 #define BCM2048_I2C_FM_AF_FREQ1 0x0d
74 #define BCM2048_I2C_FM_CARRIER 0x0e
75 #define BCM2048_I2C_FM_RSSI 0x0f
76 #define BCM2048_I2C_FM_RDS_MASK0 0x10
77 #define BCM2048_I2C_FM_RDS_MASK1 0x11
78 #define BCM2048_I2C_FM_RDS_FLAG0 0x12
79 #define BCM2048_I2C_FM_RDS_FLAG1 0x13
80 #define BCM2048_I2C_RDS_WLINE 0x14
81 #define BCM2048_I2C_RDS_BLKB_MATCH0 0x16
82 #define BCM2048_I2C_RDS_BLKB_MATCH1 0x17
83 #define BCM2048_I2C_RDS_BLKB_MASK0 0x18
84 #define BCM2048_I2C_RDS_BLKB_MASK1 0x19
85 #define BCM2048_I2C_RDS_PI_MATCH0 0x1a
86 #define BCM2048_I2C_RDS_PI_MATCH1 0x1b
87 #define BCM2048_I2C_RDS_PI_MASK0 0x1c
88 #define BCM2048_I2C_RDS_PI_MASK1 0x1d
89 #define BCM2048_I2C_SPARE1 0x20
90 #define BCM2048_I2C_SPARE2 0x21
91 #define BCM2048_I2C_FM_RDS_REV 0x28
92 #define BCM2048_I2C_SLAVE_CONFIGURATION 0x29
93 #define BCM2048_I2C_RDS_DATA 0x80
94 #define BCM2048_I2C_FM_BEST_TUNE_MODE 0x90
96 /* BCM2048_I2C_FM_RDS_SYSTEM */
97 #define BCM2048_FM_ON 0x01
98 #define BCM2048_RDS_ON 0x02
100 /* BCM2048_I2C_FM_CTRL */
101 #define BCM2048_BAND_SELECT 0x01
102 #define BCM2048_STEREO_MONO_AUTO_SELECT 0x02
103 #define BCM2048_STEREO_MONO_MANUAL_SELECT 0x04
104 #define BCM2048_STEREO_MONO_BLEND_SWITCH 0x08
105 #define BCM2048_HI_LO_INJECTION 0x10
107 /* BCM2048_I2C_RDS_CTRL0 */
108 #define BCM2048_RBDS_RDS_SELECT 0x01
109 #define BCM2048_FLUSH_FIFO 0x02
111 /* BCM2048_I2C_FM_AUDIO_PAUSE */
112 #define BCM2048_AUDIO_PAUSE_RSSI_TRESH 0x0f
113 #define BCM2048_AUDIO_PAUSE_DURATION 0xf0
115 /* BCM2048_I2C_FM_AUDIO_CTRL0 */
116 #define BCM2048_RF_MUTE 0x01
117 #define BCM2048_MANUAL_MUTE 0x02
118 #define BCM2048_DAC_OUTPUT_LEFT 0x04
119 #define BCM2048_DAC_OUTPUT_RIGHT 0x08
120 #define BCM2048_AUDIO_ROUTE_DAC 0x10
121 #define BCM2048_AUDIO_ROUTE_I2S 0x20
122 #define BCM2048_DE_EMPHASIS_SELECT 0x40
123 #define BCM2048_AUDIO_BANDWIDTH_SELECT 0x80
125 /* BCM2048_I2C_FM_SEARCH_CTRL0 */
126 #define BCM2048_SEARCH_RSSI_THRESHOLD 0x7f
127 #define BCM2048_SEARCH_DIRECTION 0x80
129 /* BCM2048_I2C_FM_SEARCH_TUNE_MODE */
130 #define BCM2048_FM_AUTO_SEARCH 0x03
132 /* BCM2048_I2C_FM_RSSI */
133 #define BCM2048_RSSI_VALUE 0xff
135 /* BCM2048_I2C_FM_RDS_MASK0 */
136 /* BCM2048_I2C_FM_RDS_MASK1 */
137 #define BCM2048_FM_FLAG_SEARCH_TUNE_FINISHED 0x01
138 #define BCM2048_FM_FLAG_SEARCH_TUNE_FAIL 0x02
139 #define BCM2048_FM_FLAG_RSSI_LOW 0x04
140 #define BCM2048_FM_FLAG_CARRIER_ERROR_HIGH 0x08
141 #define BCM2048_FM_FLAG_AUDIO_PAUSE_INDICATION 0x10
142 #define BCM2048_FLAG_STEREO_DETECTED 0x20
143 #define BCM2048_FLAG_STEREO_ACTIVE 0x40
145 /* BCM2048_I2C_RDS_DATA */
146 #define BCM2048_SLAVE_ADDRESS 0x3f
147 #define BCM2048_SLAVE_ENABLE 0x80
149 /* BCM2048_I2C_FM_BEST_TUNE_MODE */
150 #define BCM2048_BEST_TUNE_MODE 0x80
152 #define BCM2048_FM_FLAG_SEARCH_TUNE_FINISHED 0x01
153 #define BCM2048_FM_FLAG_SEARCH_TUNE_FAIL 0x02
154 #define BCM2048_FM_FLAG_RSSI_LOW 0x04
155 #define BCM2048_FM_FLAG_CARRIER_ERROR_HIGH 0x08
156 #define BCM2048_FM_FLAG_AUDIO_PAUSE_INDICATION 0x10
157 #define BCM2048_FLAG_STEREO_DETECTED 0x20
158 #define BCM2048_FLAG_STEREO_ACTIVE 0x40
160 #define BCM2048_RDS_FLAG_FIFO_WLINE 0x02
161 #define BCM2048_RDS_FLAG_B_BLOCK_MATCH 0x08
162 #define BCM2048_RDS_FLAG_SYNC_LOST 0x10
163 #define BCM2048_RDS_FLAG_PI_MATCH 0x20
165 #define BCM2048_RDS_MARK_END_BYTE0 0x7C
166 #define BCM2048_RDS_MARK_END_BYTEN 0xFF
168 #define BCM2048_FM_FLAGS_ALL (FM_FLAG_SEARCH_TUNE_FINISHED | \
169 FM_FLAG_SEARCH_TUNE_FAIL | \
171 FM_FLAG_CARRIER_ERROR_HIGH | \
172 FM_FLAG_AUDIO_PAUSE_INDICATION | \
173 FLAG_STEREO_DETECTED | FLAG_STEREO_ACTIVE)
175 #define BCM2048_RDS_FLAGS_ALL (RDS_FLAG_FIFO_WLINE | \
176 RDS_FLAG_B_BLOCK_MATCH | \
177 RDS_FLAG_SYNC_LOST | RDS_FLAG_PI_MATCH)
179 #define BCM2048_DEFAULT_TIMEOUT 1500
180 #define BCM2048_AUTO_SEARCH_TIMEOUT 3000
183 #define BCM2048_FREQDEV_UNIT 10000
184 #define BCM2048_FREQV4L2_MULTI 625
185 #define dev_to_v4l2(f) ((f * BCM2048_FREQDEV_UNIT) / BCM2048_FREQV4L2_MULTI)
186 #define v4l2_to_dev(f) ((f * BCM2048_FREQV4L2_MULTI) / BCM2048_FREQDEV_UNIT)
188 #define msb(x) ((u8)((u16) x >> 8))
189 #define lsb(x) ((u8)((u16) x & 0x00FF))
190 #define compose_u16(msb, lsb) (((u16)msb << 8) | lsb)
192 #define BCM2048_DEFAULT_POWERING_DELAY 20
193 #define BCM2048_DEFAULT_REGION 0x02
194 #define BCM2048_DEFAULT_MUTE 0x01
195 #define BCM2048_DEFAULT_RSSI_THRESHOLD 0x64
196 #define BCM2048_DEFAULT_RDS_WLINE 0x7E
198 #define BCM2048_FM_SEARCH_INACTIVE 0x00
199 #define BCM2048_FM_PRE_SET_MODE 0x01
200 #define BCM2048_FM_AUTO_SEARCH_MODE 0x02
201 #define BCM2048_FM_AF_JUMP_MODE 0x03
203 #define BCM2048_FREQUENCY_BASE 64000
205 #define BCM2048_POWER_ON 0x01
206 #define BCM2048_POWER_OFF 0x00
208 #define BCM2048_ITEM_ENABLED 0x01
209 #define BCM2048_SEARCH_DIRECTION_UP 0x01
211 #define BCM2048_DE_EMPHASIS_75us 75
212 #define BCM2048_DE_EMPHASIS_50us 50
214 #define BCM2048_SCAN_FAIL 0x00
215 #define BCM2048_SCAN_OK 0x01
217 #define BCM2048_FREQ_ERROR_FLOOR -20
218 #define BCM2048_FREQ_ERROR_ROOF 20
220 /* -60 dB is reported as full signal strength */
221 #define BCM2048_RSSI_LEVEL_BASE -60
222 #define BCM2048_RSSI_LEVEL_ROOF -100
223 #define BCM2048_RSSI_LEVEL_ROOF_NEG 100
224 #define BCM2048_SIGNAL_MULTIPLIER (0xFFFF / \
225 (BCM2048_RSSI_LEVEL_ROOF_NEG + \
226 BCM2048_RSSI_LEVEL_BASE))
228 #define BCM2048_RDS_FIFO_DUPLE_SIZE 0x03
229 #define BCM2048_RDS_CRC_MASK 0x0F
230 #define BCM2048_RDS_CRC_NONE 0x00
231 #define BCM2048_RDS_CRC_MAX_2BITS 0x04
232 #define BCM2048_RDS_CRC_LEAST_2BITS 0x08
233 #define BCM2048_RDS_CRC_UNRECOVARABLE 0x0C
235 #define BCM2048_RDS_BLOCK_MASK 0xF0
236 #define BCM2048_RDS_BLOCK_A 0x00
237 #define BCM2048_RDS_BLOCK_B 0x10
238 #define BCM2048_RDS_BLOCK_C 0x20
239 #define BCM2048_RDS_BLOCK_D 0x30
240 #define BCM2048_RDS_BLOCK_C_SCORED 0x40
241 #define BCM2048_RDS_BLOCK_E 0x60
243 #define BCM2048_RDS_RT 0x20
244 #define BCM2048_RDS_PS 0x00
246 #define BCM2048_RDS_GROUP_AB_MASK 0x08
247 #define BCM2048_RDS_GROUP_A 0x00
248 #define BCM2048_RDS_GROUP_B 0x08
250 #define BCM2048_RDS_RT_AB_MASK 0x10
251 #define BCM2048_RDS_RT_A 0x00
252 #define BCM2048_RDS_RT_B 0x10
253 #define BCM2048_RDS_RT_INDEX 0x0F
255 #define BCM2048_RDS_PS_INDEX 0x03
259 #define BCM2048_MAX_RDS_RT (64 + 1)
260 u8 rds_rt[BCM2048_MAX_RDS_RT];
263 #define BCM2048_MAX_RDS_PS (8 + 1)
264 u8 rds_ps[BCM2048_MAX_RDS_PS];
267 #define BCM2048_MAX_RDS_RADIO_TEXT 255
268 u8 radio_text[BCM2048_MAX_RDS_RADIO_TEXT + 3];
273 u32 bottom_frequency;
280 struct bcm2048_device {
281 struct i2c_client *client;
282 struct video_device videodev;
283 struct work_struct work;
284 struct completion compl;
286 struct bcm2048_platform_data *platform_data;
287 struct rds_info rds_info;
288 struct region_info region_info;
290 u8 cache_fm_rds_system;
292 u8 cache_fm_audio_ctrl0;
293 u8 cache_fm_search_ctrl0;
300 /* for rds data device read */
301 wait_queue_head_t read_queue;
303 unsigned char rds_data_available;
304 unsigned int rd_index;
307 static int radio_nr = -1; /* radio device minor (-1 ==> auto assign) */
308 module_param(radio_nr, int, 0);
309 MODULE_PARM_DESC(radio_nr,
310 "Minor number for radio device (-1 ==> auto assign)");
312 static struct region_info region_configs[] = {
315 .channel_spacing = 20,
316 .bottom_frequency = 87500,
317 .top_frequency = 108000,
323 .channel_spacing = 20,
324 .bottom_frequency = 87500,
325 .top_frequency = 108000,
331 .channel_spacing = 10,
332 .bottom_frequency = 87500,
333 .top_frequency = 108000,
339 .channel_spacing = 10,
340 .bottom_frequency = 76000,
341 .top_frequency = 90000,
345 /* Japan wide band */
347 .channel_spacing = 10,
348 .bottom_frequency = 76000,
349 .top_frequency = 108000,
356 * I2C Interface read / write
358 static int bcm2048_send_command(struct bcm2048_device *bdev, unsigned int reg,
361 struct i2c_client *client = bdev->client;
364 if (!bdev->power_state) {
365 dev_err(&bdev->client->dev, "bcm2048: chip not powered!\n");
369 data[0] = reg & 0xff;
370 data[1] = value & 0xff;
372 if (i2c_master_send(client, data, 2) == 2)
375 dev_err(&bdev->client->dev, "BCM I2C error!\n");
376 dev_err(&bdev->client->dev, "Is Bluetooth up and running?\n");
380 static int bcm2048_recv_command(struct bcm2048_device *bdev, unsigned int reg,
383 struct i2c_client *client = bdev->client;
385 if (!bdev->power_state) {
386 dev_err(&bdev->client->dev, "bcm2048: chip not powered!\n");
390 value[0] = i2c_smbus_read_byte_data(client, reg & 0xff);
395 static int bcm2048_recv_duples(struct bcm2048_device *bdev, unsigned int reg,
396 u8 *value, u8 duples)
398 struct i2c_client *client = bdev->client;
399 struct i2c_adapter *adap = client->adapter;
400 struct i2c_msg msg[2];
403 if (!bdev->power_state) {
404 dev_err(&bdev->client->dev, "bcm2048: chip not powered!\n");
410 msg[0].addr = client->addr;
411 msg[0].flags = client->flags & I2C_M_TEN;
415 msg[1].addr = client->addr;
416 msg[1].flags = client->flags & I2C_M_TEN;
417 msg[1].flags |= I2C_M_RD;
421 return i2c_transfer(adap, msg, 2);
425 * BCM2048 - I2C register programming helpers
427 static int bcm2048_set_power_state(struct bcm2048_device *bdev, u8 power)
431 mutex_lock(&bdev->mutex);
434 bdev->power_state = BCM2048_POWER_ON;
435 bdev->cache_fm_rds_system |= BCM2048_FM_ON;
437 bdev->cache_fm_rds_system &= ~BCM2048_FM_ON;
441 * Warning! FM cannot be turned off because then
442 * the I2C communications get ruined!
443 * Comment off the "if (power)" when the chip works!
446 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM,
447 bdev->cache_fm_rds_system);
448 msleep(BCM2048_DEFAULT_POWERING_DELAY);
451 bdev->power_state = BCM2048_POWER_OFF;
453 mutex_unlock(&bdev->mutex);
457 static int bcm2048_get_power_state(struct bcm2048_device *bdev)
462 mutex_lock(&bdev->mutex);
464 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM, &value);
466 mutex_unlock(&bdev->mutex);
468 if (!err && (value & BCM2048_FM_ON))
469 return BCM2048_POWER_ON;
474 static int bcm2048_set_rds_no_lock(struct bcm2048_device *bdev, u8 rds_on)
479 bdev->cache_fm_rds_system &= ~BCM2048_RDS_ON;
482 bdev->cache_fm_rds_system |= BCM2048_RDS_ON;
483 bdev->rds_state = BCM2048_RDS_ON;
484 flags = BCM2048_RDS_FLAG_FIFO_WLINE;
485 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_MASK1,
490 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_MASK1,
492 memset(&bdev->rds_info, 0, sizeof(bdev->rds_info));
495 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM,
496 bdev->cache_fm_rds_system);
501 static int bcm2048_get_rds_no_lock(struct bcm2048_device *bdev)
506 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM, &value);
508 if (!err && (value & BCM2048_RDS_ON))
509 return BCM2048_ITEM_ENABLED;
514 static int bcm2048_set_rds(struct bcm2048_device *bdev, u8 rds_on)
518 mutex_lock(&bdev->mutex);
520 err = bcm2048_set_rds_no_lock(bdev, rds_on);
522 mutex_unlock(&bdev->mutex);
526 static int bcm2048_get_rds(struct bcm2048_device *bdev)
530 mutex_lock(&bdev->mutex);
532 err = bcm2048_get_rds_no_lock(bdev);
534 mutex_unlock(&bdev->mutex);
538 static int bcm2048_get_rds_pi(struct bcm2048_device *bdev)
540 return bdev->rds_info.rds_pi;
543 static int bcm2048_set_fm_automatic_stereo_mono(struct bcm2048_device *bdev,
548 mutex_lock(&bdev->mutex);
550 bdev->cache_fm_ctrl &= ~BCM2048_STEREO_MONO_AUTO_SELECT;
553 bdev->cache_fm_ctrl |= BCM2048_STEREO_MONO_AUTO_SELECT;
555 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_CTRL,
556 bdev->cache_fm_ctrl);
558 mutex_unlock(&bdev->mutex);
562 static int bcm2048_set_fm_hi_lo_injection(struct bcm2048_device *bdev,
567 mutex_lock(&bdev->mutex);
569 bdev->cache_fm_ctrl &= ~BCM2048_HI_LO_INJECTION;
572 bdev->cache_fm_ctrl |= BCM2048_HI_LO_INJECTION;
574 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_CTRL,
575 bdev->cache_fm_ctrl);
577 mutex_unlock(&bdev->mutex);
581 static int bcm2048_get_fm_hi_lo_injection(struct bcm2048_device *bdev)
586 mutex_lock(&bdev->mutex);
588 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_CTRL, &value);
590 mutex_unlock(&bdev->mutex);
592 if (!err && (value & BCM2048_HI_LO_INJECTION))
593 return BCM2048_ITEM_ENABLED;
598 static int bcm2048_set_fm_frequency(struct bcm2048_device *bdev, u32 frequency)
602 if (frequency < bdev->region_info.bottom_frequency ||
603 frequency > bdev->region_info.top_frequency)
606 frequency -= BCM2048_FREQUENCY_BASE;
608 mutex_lock(&bdev->mutex);
610 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_FREQ0, lsb(frequency));
611 err |= bcm2048_send_command(bdev, BCM2048_I2C_FM_FREQ1,
615 bdev->frequency = frequency;
617 mutex_unlock(&bdev->mutex);
621 static int bcm2048_get_fm_frequency(struct bcm2048_device *bdev)
626 mutex_lock(&bdev->mutex);
628 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_FREQ0, &lsb);
629 err |= bcm2048_recv_command(bdev, BCM2048_I2C_FM_FREQ1, &msb);
631 mutex_unlock(&bdev->mutex);
636 err = compose_u16(msb, lsb);
637 err += BCM2048_FREQUENCY_BASE;
642 static int bcm2048_set_fm_af_frequency(struct bcm2048_device *bdev,
647 if (frequency < bdev->region_info.bottom_frequency ||
648 frequency > bdev->region_info.top_frequency)
651 frequency -= BCM2048_FREQUENCY_BASE;
653 mutex_lock(&bdev->mutex);
655 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AF_FREQ0,
657 err |= bcm2048_send_command(bdev, BCM2048_I2C_FM_AF_FREQ1,
660 bdev->frequency = frequency;
662 mutex_unlock(&bdev->mutex);
666 static int bcm2048_get_fm_af_frequency(struct bcm2048_device *bdev)
671 mutex_lock(&bdev->mutex);
673 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AF_FREQ0, &lsb);
674 err |= bcm2048_recv_command(bdev, BCM2048_I2C_FM_AF_FREQ1, &msb);
676 mutex_unlock(&bdev->mutex);
681 err = compose_u16(msb, lsb);
682 err += BCM2048_FREQUENCY_BASE;
687 static int bcm2048_set_fm_deemphasis(struct bcm2048_device *bdev, int d)
692 if (d == BCM2048_DE_EMPHASIS_75us)
693 deemphasis = BCM2048_DE_EMPHASIS_SELECT;
697 mutex_lock(&bdev->mutex);
699 bdev->cache_fm_audio_ctrl0 &= ~BCM2048_DE_EMPHASIS_SELECT;
700 bdev->cache_fm_audio_ctrl0 |= deemphasis;
702 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
703 bdev->cache_fm_audio_ctrl0);
706 bdev->region_info.deemphasis = d;
708 mutex_unlock(&bdev->mutex);
713 static int bcm2048_get_fm_deemphasis(struct bcm2048_device *bdev)
718 mutex_lock(&bdev->mutex);
720 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0, &value);
722 mutex_unlock(&bdev->mutex);
725 if (value & BCM2048_DE_EMPHASIS_SELECT)
726 return BCM2048_DE_EMPHASIS_75us;
728 return BCM2048_DE_EMPHASIS_50us;
734 static int bcm2048_set_region(struct bcm2048_device *bdev, u8 region)
737 u32 new_frequency = 0;
739 if (region >= ARRAY_SIZE(region_configs))
742 mutex_lock(&bdev->mutex);
743 bdev->region_info = region_configs[region];
744 mutex_unlock(&bdev->mutex);
746 if (bdev->frequency < region_configs[region].bottom_frequency ||
747 bdev->frequency > region_configs[region].top_frequency)
748 new_frequency = region_configs[region].bottom_frequency;
750 if (new_frequency > 0) {
751 err = bcm2048_set_fm_frequency(bdev, new_frequency);
757 err = bcm2048_set_fm_deemphasis(bdev,
758 region_configs[region].deemphasis);
764 static int bcm2048_get_region(struct bcm2048_device *bdev)
768 mutex_lock(&bdev->mutex);
769 err = bdev->region_info.region;
770 mutex_unlock(&bdev->mutex);
775 static int bcm2048_set_mute(struct bcm2048_device *bdev, u16 mute)
779 mutex_lock(&bdev->mutex);
781 bdev->cache_fm_audio_ctrl0 &= ~(BCM2048_RF_MUTE | BCM2048_MANUAL_MUTE);
784 bdev->cache_fm_audio_ctrl0 |= (BCM2048_RF_MUTE |
785 BCM2048_MANUAL_MUTE);
787 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
788 bdev->cache_fm_audio_ctrl0);
791 bdev->mute_state = mute;
793 mutex_unlock(&bdev->mutex);
797 static int bcm2048_get_mute(struct bcm2048_device *bdev)
802 mutex_lock(&bdev->mutex);
804 if (bdev->power_state) {
805 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
808 err = value & (BCM2048_RF_MUTE | BCM2048_MANUAL_MUTE);
810 err = bdev->mute_state;
813 mutex_unlock(&bdev->mutex);
817 static int bcm2048_set_audio_route(struct bcm2048_device *bdev, u8 route)
821 mutex_lock(&bdev->mutex);
823 route &= (BCM2048_AUDIO_ROUTE_DAC | BCM2048_AUDIO_ROUTE_I2S);
824 bdev->cache_fm_audio_ctrl0 &= ~(BCM2048_AUDIO_ROUTE_DAC |
825 BCM2048_AUDIO_ROUTE_I2S);
826 bdev->cache_fm_audio_ctrl0 |= route;
828 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
829 bdev->cache_fm_audio_ctrl0);
831 mutex_unlock(&bdev->mutex);
835 static int bcm2048_get_audio_route(struct bcm2048_device *bdev)
840 mutex_lock(&bdev->mutex);
842 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0, &value);
844 mutex_unlock(&bdev->mutex);
847 return value & (BCM2048_AUDIO_ROUTE_DAC |
848 BCM2048_AUDIO_ROUTE_I2S);
853 static int bcm2048_set_dac_output(struct bcm2048_device *bdev, u8 channels)
857 mutex_lock(&bdev->mutex);
859 bdev->cache_fm_audio_ctrl0 &= ~(BCM2048_DAC_OUTPUT_LEFT |
860 BCM2048_DAC_OUTPUT_RIGHT);
861 bdev->cache_fm_audio_ctrl0 |= channels;
863 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
864 bdev->cache_fm_audio_ctrl0);
866 mutex_unlock(&bdev->mutex);
870 static int bcm2048_get_dac_output(struct bcm2048_device *bdev)
875 mutex_lock(&bdev->mutex);
877 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0, &value);
879 mutex_unlock(&bdev->mutex);
882 return value & (BCM2048_DAC_OUTPUT_LEFT |
883 BCM2048_DAC_OUTPUT_RIGHT);
888 static int bcm2048_set_fm_search_rssi_threshold(struct bcm2048_device *bdev,
893 mutex_lock(&bdev->mutex);
895 threshold &= BCM2048_SEARCH_RSSI_THRESHOLD;
896 bdev->cache_fm_search_ctrl0 &= ~BCM2048_SEARCH_RSSI_THRESHOLD;
897 bdev->cache_fm_search_ctrl0 |= threshold;
899 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_SEARCH_CTRL0,
900 bdev->cache_fm_search_ctrl0);
902 mutex_unlock(&bdev->mutex);
906 static int bcm2048_get_fm_search_rssi_threshold(struct bcm2048_device *bdev)
911 mutex_lock(&bdev->mutex);
913 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_SEARCH_CTRL0, &value);
915 mutex_unlock(&bdev->mutex);
918 return value & BCM2048_SEARCH_RSSI_THRESHOLD;
923 static int bcm2048_set_fm_search_mode_direction(struct bcm2048_device *bdev,
928 mutex_lock(&bdev->mutex);
930 bdev->cache_fm_search_ctrl0 &= ~BCM2048_SEARCH_DIRECTION;
933 bdev->cache_fm_search_ctrl0 |= BCM2048_SEARCH_DIRECTION;
935 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_SEARCH_CTRL0,
936 bdev->cache_fm_search_ctrl0);
938 mutex_unlock(&bdev->mutex);
942 static int bcm2048_get_fm_search_mode_direction(struct bcm2048_device *bdev)
947 mutex_lock(&bdev->mutex);
949 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_SEARCH_CTRL0, &value);
951 mutex_unlock(&bdev->mutex);
953 if (!err && (value & BCM2048_SEARCH_DIRECTION))
954 return BCM2048_SEARCH_DIRECTION_UP;
959 static int bcm2048_set_fm_search_tune_mode(struct bcm2048_device *bdev,
962 int err, timeout, restart_rds = 0;
965 value = mode & BCM2048_FM_AUTO_SEARCH;
967 flags = BCM2048_FM_FLAG_SEARCH_TUNE_FINISHED |
968 BCM2048_FM_FLAG_SEARCH_TUNE_FAIL;
970 mutex_lock(&bdev->mutex);
973 * If RDS is enabled, and frequency is changed, RDS quits working.
974 * Thus, always restart RDS if it's enabled. Moreover, RDS must
975 * not be enabled while changing the frequency because it can
976 * provide a race to the mutex from the workqueue handler if RDS
977 * IRQ occurs while waiting for frequency changed IRQ.
979 if (bcm2048_get_rds_no_lock(bdev)) {
980 err = bcm2048_set_rds_no_lock(bdev, 0);
986 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_MASK0, flags);
991 bcm2048_send_command(bdev, BCM2048_I2C_FM_SEARCH_TUNE_MODE, value);
993 if (mode != BCM2048_FM_AUTO_SEARCH_MODE)
994 timeout = BCM2048_DEFAULT_TIMEOUT;
996 timeout = BCM2048_AUTO_SEARCH_TIMEOUT;
998 if (!wait_for_completion_timeout(&bdev->compl,
999 msecs_to_jiffies(timeout)))
1000 dev_err(&bdev->client->dev, "IRQ timeout.\n");
1003 if (!bdev->scan_state)
1008 err |= bcm2048_set_rds_no_lock(bdev, 1);
1010 mutex_unlock(&bdev->mutex);
1015 static int bcm2048_get_fm_search_tune_mode(struct bcm2048_device *bdev)
1020 mutex_lock(&bdev->mutex);
1022 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_SEARCH_TUNE_MODE,
1025 mutex_unlock(&bdev->mutex);
1028 return value & BCM2048_FM_AUTO_SEARCH;
1033 static int bcm2048_set_rds_b_block_mask(struct bcm2048_device *bdev, u16 mask)
1037 mutex_lock(&bdev->mutex);
1039 err = bcm2048_send_command(bdev,
1040 BCM2048_I2C_RDS_BLKB_MASK0, lsb(mask));
1041 err |= bcm2048_send_command(bdev,
1042 BCM2048_I2C_RDS_BLKB_MASK1, msb(mask));
1044 mutex_unlock(&bdev->mutex);
1048 static int bcm2048_get_rds_b_block_mask(struct bcm2048_device *bdev)
1053 mutex_lock(&bdev->mutex);
1055 err = bcm2048_recv_command(bdev,
1056 BCM2048_I2C_RDS_BLKB_MASK0, &lsb);
1057 err |= bcm2048_recv_command(bdev,
1058 BCM2048_I2C_RDS_BLKB_MASK1, &msb);
1060 mutex_unlock(&bdev->mutex);
1063 return compose_u16(msb, lsb);
1068 static int bcm2048_set_rds_b_block_match(struct bcm2048_device *bdev,
1073 mutex_lock(&bdev->mutex);
1075 err = bcm2048_send_command(bdev,
1076 BCM2048_I2C_RDS_BLKB_MATCH0, lsb(match));
1077 err |= bcm2048_send_command(bdev,
1078 BCM2048_I2C_RDS_BLKB_MATCH1, msb(match));
1080 mutex_unlock(&bdev->mutex);
1084 static int bcm2048_get_rds_b_block_match(struct bcm2048_device *bdev)
1089 mutex_lock(&bdev->mutex);
1091 err = bcm2048_recv_command(bdev,
1092 BCM2048_I2C_RDS_BLKB_MATCH0, &lsb);
1093 err |= bcm2048_recv_command(bdev,
1094 BCM2048_I2C_RDS_BLKB_MATCH1, &msb);
1096 mutex_unlock(&bdev->mutex);
1099 return compose_u16(msb, lsb);
1104 static int bcm2048_set_rds_pi_mask(struct bcm2048_device *bdev, u16 mask)
1108 mutex_lock(&bdev->mutex);
1110 err = bcm2048_send_command(bdev,
1111 BCM2048_I2C_RDS_PI_MASK0, lsb(mask));
1112 err |= bcm2048_send_command(bdev,
1113 BCM2048_I2C_RDS_PI_MASK1, msb(mask));
1115 mutex_unlock(&bdev->mutex);
1119 static int bcm2048_get_rds_pi_mask(struct bcm2048_device *bdev)
1124 mutex_lock(&bdev->mutex);
1126 err = bcm2048_recv_command(bdev,
1127 BCM2048_I2C_RDS_PI_MASK0, &lsb);
1128 err |= bcm2048_recv_command(bdev,
1129 BCM2048_I2C_RDS_PI_MASK1, &msb);
1131 mutex_unlock(&bdev->mutex);
1134 return compose_u16(msb, lsb);
1139 static int bcm2048_set_rds_pi_match(struct bcm2048_device *bdev, u16 match)
1143 mutex_lock(&bdev->mutex);
1145 err = bcm2048_send_command(bdev,
1146 BCM2048_I2C_RDS_PI_MATCH0, lsb(match));
1147 err |= bcm2048_send_command(bdev,
1148 BCM2048_I2C_RDS_PI_MATCH1, msb(match));
1150 mutex_unlock(&bdev->mutex);
1154 static int bcm2048_get_rds_pi_match(struct bcm2048_device *bdev)
1159 mutex_lock(&bdev->mutex);
1161 err = bcm2048_recv_command(bdev,
1162 BCM2048_I2C_RDS_PI_MATCH0, &lsb);
1163 err |= bcm2048_recv_command(bdev,
1164 BCM2048_I2C_RDS_PI_MATCH1, &msb);
1166 mutex_unlock(&bdev->mutex);
1169 return compose_u16(msb, lsb);
1174 static int bcm2048_set_fm_rds_mask(struct bcm2048_device *bdev, u16 mask)
1178 mutex_lock(&bdev->mutex);
1180 err = bcm2048_send_command(bdev,
1181 BCM2048_I2C_FM_RDS_MASK0, lsb(mask));
1182 err |= bcm2048_send_command(bdev,
1183 BCM2048_I2C_FM_RDS_MASK1, msb(mask));
1185 mutex_unlock(&bdev->mutex);
1189 static int bcm2048_get_fm_rds_mask(struct bcm2048_device *bdev)
1194 mutex_lock(&bdev->mutex);
1196 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_MASK0, &value0);
1197 err |= bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_MASK1, &value1);
1199 mutex_unlock(&bdev->mutex);
1202 return compose_u16(value1, value0);
1207 static int bcm2048_get_fm_rds_flags(struct bcm2048_device *bdev)
1212 mutex_lock(&bdev->mutex);
1214 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_FLAG0, &value0);
1215 err |= bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_FLAG1, &value1);
1217 mutex_unlock(&bdev->mutex);
1220 return compose_u16(value1, value0);
1225 static int bcm2048_get_region_bottom_frequency(struct bcm2048_device *bdev)
1227 return bdev->region_info.bottom_frequency;
1230 static int bcm2048_get_region_top_frequency(struct bcm2048_device *bdev)
1232 return bdev->region_info.top_frequency;
1235 static int bcm2048_set_fm_best_tune_mode(struct bcm2048_device *bdev, u8 mode)
1240 mutex_lock(&bdev->mutex);
1242 /* Perform read as the manual indicates */
1243 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_BEST_TUNE_MODE,
1245 value &= ~BCM2048_BEST_TUNE_MODE;
1248 value |= BCM2048_BEST_TUNE_MODE;
1249 err |= bcm2048_send_command(bdev, BCM2048_I2C_FM_BEST_TUNE_MODE,
1252 mutex_unlock(&bdev->mutex);
1256 static int bcm2048_get_fm_best_tune_mode(struct bcm2048_device *bdev)
1261 mutex_lock(&bdev->mutex);
1263 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_BEST_TUNE_MODE,
1266 mutex_unlock(&bdev->mutex);
1268 if (!err && (value & BCM2048_BEST_TUNE_MODE))
1269 return BCM2048_ITEM_ENABLED;
1274 static int bcm2048_get_fm_carrier_error(struct bcm2048_device *bdev)
1279 mutex_lock(&bdev->mutex);
1280 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_CARRIER, &value);
1281 mutex_unlock(&bdev->mutex);
1289 static int bcm2048_get_fm_rssi(struct bcm2048_device *bdev)
1294 mutex_lock(&bdev->mutex);
1295 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RSSI, &value);
1296 mutex_unlock(&bdev->mutex);
1304 static int bcm2048_set_rds_wline(struct bcm2048_device *bdev, u8 wline)
1308 mutex_lock(&bdev->mutex);
1310 err = bcm2048_send_command(bdev, BCM2048_I2C_RDS_WLINE, wline);
1313 bdev->fifo_size = wline;
1315 mutex_unlock(&bdev->mutex);
1319 static int bcm2048_get_rds_wline(struct bcm2048_device *bdev)
1324 mutex_lock(&bdev->mutex);
1326 err = bcm2048_recv_command(bdev, BCM2048_I2C_RDS_WLINE, &value);
1328 mutex_unlock(&bdev->mutex);
1331 bdev->fifo_size = value;
1338 static int bcm2048_checkrev(struct bcm2048_device *bdev)
1343 mutex_lock(&bdev->mutex);
1345 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_REV, &version);
1347 mutex_unlock(&bdev->mutex);
1350 dev_info(&bdev->client->dev, "BCM2048 Version 0x%x\n",
1358 static int bcm2048_get_rds_rt(struct bcm2048_device *bdev, char *data)
1360 int err = 0, i, j = 0, ce = 0, cr = 0;
1361 char data_buffer[BCM2048_MAX_RDS_RT+1];
1363 mutex_lock(&bdev->mutex);
1365 if (!bdev->rds_info.text_len) {
1370 for (i = 0; i < BCM2048_MAX_RDS_RT; i++) {
1371 if (bdev->rds_info.rds_rt[i]) {
1373 /* Skip the carriage return */
1374 if (bdev->rds_info.rds_rt[i] != 0x0d) {
1375 data_buffer[j++] = bdev->rds_info.rds_rt[i];
1383 if (j <= BCM2048_MAX_RDS_RT)
1386 for (i = 0; i < BCM2048_MAX_RDS_RT; i++) {
1387 if (!bdev->rds_info.rds_rt[i]) {
1388 if (cr && (i < cr)) {
1393 if (cr && (i >= cr))
1401 memcpy(data, data_buffer, sizeof(data_buffer));
1404 mutex_unlock(&bdev->mutex);
1408 static int bcm2048_get_rds_ps(struct bcm2048_device *bdev, char *data)
1410 int err = 0, i, j = 0;
1411 char data_buffer[BCM2048_MAX_RDS_PS+1];
1413 mutex_lock(&bdev->mutex);
1415 if (!bdev->rds_info.text_len) {
1420 for (i = 0; i < BCM2048_MAX_RDS_PS; i++) {
1421 if (bdev->rds_info.rds_ps[i]) {
1422 data_buffer[j++] = bdev->rds_info.rds_ps[i];
1424 if (i < (BCM2048_MAX_RDS_PS - 1)) {
1431 if (j <= BCM2048_MAX_RDS_PS)
1434 memcpy(data, data_buffer, sizeof(data_buffer));
1437 mutex_unlock(&bdev->mutex);
1441 static void bcm2048_parse_rds_pi(struct bcm2048_device *bdev)
1446 for (i = 0; i < bdev->fifo_size; i += BCM2048_RDS_FIFO_DUPLE_SIZE) {
1448 /* Block A match, only data without crc errors taken */
1449 if (bdev->rds_info.radio_text[i] == BCM2048_RDS_BLOCK_A) {
1451 pi = (bdev->rds_info.radio_text[i+1] << 8) +
1452 bdev->rds_info.radio_text[i+2];
1454 if (!bdev->rds_info.rds_pi) {
1455 bdev->rds_info.rds_pi = pi;
1458 if (pi != bdev->rds_info.rds_pi) {
1461 bdev->rds_info.rds_pi = pi;
1471 static int bcm2048_rds_block_crc(struct bcm2048_device *bdev, int i)
1473 return bdev->rds_info.radio_text[i] & BCM2048_RDS_CRC_MASK;
1476 static void bcm2048_parse_rds_rt_block(struct bcm2048_device *bdev, int i,
1479 /* Good data will overwrite poor data */
1481 if (!bdev->rds_info.rds_rt[index])
1482 bdev->rds_info.rds_rt[index] =
1483 bdev->rds_info.radio_text[i+1];
1484 if (!bdev->rds_info.rds_rt[index+1])
1485 bdev->rds_info.rds_rt[index+1] =
1486 bdev->rds_info.radio_text[i+2];
1488 bdev->rds_info.rds_rt[index] = bdev->rds_info.radio_text[i+1];
1489 bdev->rds_info.rds_rt[index+1] =
1490 bdev->rds_info.radio_text[i+2];
1494 static int bcm2048_parse_rt_match_b(struct bcm2048_device *bdev, int i)
1496 int crc, rt_id, rt_group_b, rt_ab, index = 0;
1498 crc = bcm2048_rds_block_crc(bdev, i);
1500 if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
1503 if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
1504 BCM2048_RDS_BLOCK_B) {
1506 rt_id = bdev->rds_info.radio_text[i+1] &
1507 BCM2048_RDS_BLOCK_MASK;
1508 rt_group_b = bdev->rds_info.radio_text[i+1] &
1509 BCM2048_RDS_GROUP_AB_MASK;
1510 rt_ab = bdev->rds_info.radio_text[i+2] &
1511 BCM2048_RDS_RT_AB_MASK;
1513 if (rt_group_b != bdev->rds_info.rds_rt_group_b) {
1514 memset(bdev->rds_info.rds_rt, 0,
1515 sizeof(bdev->rds_info.rds_rt));
1516 bdev->rds_info.rds_rt_group_b = rt_group_b;
1519 if (rt_id == BCM2048_RDS_RT) {
1520 /* A to B or (vice versa), means: clear screen */
1521 if (rt_ab != bdev->rds_info.rds_rt_ab) {
1522 memset(bdev->rds_info.rds_rt, 0,
1523 sizeof(bdev->rds_info.rds_rt));
1524 bdev->rds_info.rds_rt_ab = rt_ab;
1527 index = bdev->rds_info.radio_text[i+2] &
1528 BCM2048_RDS_RT_INDEX;
1530 if (bdev->rds_info.rds_rt_group_b)
1542 static int bcm2048_parse_rt_match_c(struct bcm2048_device *bdev, int i,
1547 crc = bcm2048_rds_block_crc(bdev, i);
1549 if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
1552 BUG_ON((index+2) >= BCM2048_MAX_RDS_RT);
1554 if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
1555 BCM2048_RDS_BLOCK_C) {
1556 if (bdev->rds_info.rds_rt_group_b)
1558 bcm2048_parse_rds_rt_block(bdev, i, index, crc);
1565 static void bcm2048_parse_rt_match_d(struct bcm2048_device *bdev, int i,
1570 crc = bcm2048_rds_block_crc(bdev, i);
1572 if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
1575 BUG_ON((index+4) >= BCM2048_MAX_RDS_RT);
1577 if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
1578 BCM2048_RDS_BLOCK_D)
1579 bcm2048_parse_rds_rt_block(bdev, i, index+2, crc);
1582 static void bcm2048_parse_rds_rt(struct bcm2048_device *bdev)
1584 int i, index = 0, crc, match_b = 0, match_c = 0, match_d = 0;
1586 for (i = 0; i < bdev->fifo_size; i += BCM2048_RDS_FIFO_DUPLE_SIZE) {
1590 index = bcm2048_parse_rt_match_b(bdev, i);
1591 if (index >= 0 && index <= (BCM2048_MAX_RDS_RT - 5))
1594 } else if (match_c) {
1596 if (bcm2048_parse_rt_match_c(bdev, i, index))
1599 } else if (match_d) {
1601 bcm2048_parse_rt_match_d(bdev, i, index);
1605 /* Skip erroneous blocks due to messed up A block altogether */
1606 if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK)
1607 == BCM2048_RDS_BLOCK_A) {
1608 crc = bcm2048_rds_block_crc(bdev, i);
1609 if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
1611 /* Syncronize to a good RDS PI */
1612 if (((bdev->rds_info.radio_text[i+1] << 8) +
1613 bdev->rds_info.radio_text[i+2]) ==
1614 bdev->rds_info.rds_pi)
1620 static void bcm2048_parse_rds_ps_block(struct bcm2048_device *bdev, int i,
1623 /* Good data will overwrite poor data */
1625 if (!bdev->rds_info.rds_ps[index])
1626 bdev->rds_info.rds_ps[index] =
1627 bdev->rds_info.radio_text[i+1];
1628 if (!bdev->rds_info.rds_ps[index+1])
1629 bdev->rds_info.rds_ps[index+1] =
1630 bdev->rds_info.radio_text[i+2];
1632 bdev->rds_info.rds_ps[index] = bdev->rds_info.radio_text[i+1];
1633 bdev->rds_info.rds_ps[index+1] =
1634 bdev->rds_info.radio_text[i+2];
1638 static int bcm2048_parse_ps_match_c(struct bcm2048_device *bdev, int i,
1643 crc = bcm2048_rds_block_crc(bdev, i);
1645 if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
1648 if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
1649 BCM2048_RDS_BLOCK_C)
1655 static void bcm2048_parse_ps_match_d(struct bcm2048_device *bdev, int i,
1660 crc = bcm2048_rds_block_crc(bdev, i);
1662 if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
1665 if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
1666 BCM2048_RDS_BLOCK_D)
1667 bcm2048_parse_rds_ps_block(bdev, i, index, crc);
1670 static int bcm2048_parse_ps_match_b(struct bcm2048_device *bdev, int i)
1672 int crc, index, ps_id, ps_group;
1674 crc = bcm2048_rds_block_crc(bdev, i);
1676 if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
1679 /* Block B Radio PS match */
1680 if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
1681 BCM2048_RDS_BLOCK_B) {
1682 ps_id = bdev->rds_info.radio_text[i+1] &
1683 BCM2048_RDS_BLOCK_MASK;
1684 ps_group = bdev->rds_info.radio_text[i+1] &
1685 BCM2048_RDS_GROUP_AB_MASK;
1688 * Poor RSSI will lead to RDS data corruption
1689 * So using 3 (same) sequential values to justify major changes
1691 if (ps_group != bdev->rds_info.rds_ps_group) {
1692 if (crc == BCM2048_RDS_CRC_NONE) {
1693 bdev->rds_info.rds_ps_group_cnt++;
1694 if (bdev->rds_info.rds_ps_group_cnt > 2) {
1695 bdev->rds_info.rds_ps_group = ps_group;
1696 bdev->rds_info.rds_ps_group_cnt = 0;
1697 dev_err(&bdev->client->dev,
1698 "RDS PS Group change!\n");
1703 bdev->rds_info.rds_ps_group_cnt = 0;
1707 if (ps_id == BCM2048_RDS_PS) {
1708 index = bdev->rds_info.radio_text[i+2] &
1709 BCM2048_RDS_PS_INDEX;
1718 static void bcm2048_parse_rds_ps(struct bcm2048_device *bdev)
1720 int i, index = 0, crc, match_b = 0, match_c = 0, match_d = 0;
1722 for (i = 0; i < bdev->fifo_size; i += BCM2048_RDS_FIFO_DUPLE_SIZE) {
1726 index = bcm2048_parse_ps_match_b(bdev, i);
1727 if (index >= 0 && index < (BCM2048_MAX_RDS_PS - 1))
1730 } else if (match_c) {
1732 if (bcm2048_parse_ps_match_c(bdev, i, index))
1735 } else if (match_d) {
1737 bcm2048_parse_ps_match_d(bdev, i, index);
1741 /* Skip erroneous blocks due to messed up A block altogether */
1742 if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK)
1743 == BCM2048_RDS_BLOCK_A) {
1744 crc = bcm2048_rds_block_crc(bdev, i);
1745 if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
1747 /* Syncronize to a good RDS PI */
1748 if (((bdev->rds_info.radio_text[i+1] << 8) +
1749 bdev->rds_info.radio_text[i+2]) ==
1750 bdev->rds_info.rds_pi)
1756 static void bcm2048_rds_fifo_receive(struct bcm2048_device *bdev)
1760 mutex_lock(&bdev->mutex);
1762 err = bcm2048_recv_duples(bdev, BCM2048_I2C_RDS_DATA,
1763 bdev->rds_info.radio_text, bdev->fifo_size);
1765 dev_err(&bdev->client->dev, "RDS Read problem\n");
1766 mutex_unlock(&bdev->mutex);
1770 bdev->rds_info.text_len = bdev->fifo_size;
1772 bcm2048_parse_rds_pi(bdev);
1773 bcm2048_parse_rds_rt(bdev);
1774 bcm2048_parse_rds_ps(bdev);
1776 mutex_unlock(&bdev->mutex);
1778 wake_up_interruptible(&bdev->read_queue);
1781 static int bcm2048_get_rds_data(struct bcm2048_device *bdev, char *data)
1783 int err = 0, i, p = 0;
1786 mutex_lock(&bdev->mutex);
1788 if (!bdev->rds_info.text_len) {
1793 data_buffer = kcalloc(BCM2048_MAX_RDS_RADIO_TEXT, 5, GFP_KERNEL);
1799 for (i = 0; i < bdev->rds_info.text_len; i++) {
1800 p += sprintf(data_buffer+p, "%x ",
1801 bdev->rds_info.radio_text[i]);
1804 memcpy(data, data_buffer, p);
1808 mutex_unlock(&bdev->mutex);
1813 * BCM2048 default initialization sequence
1815 static int bcm2048_init(struct bcm2048_device *bdev)
1819 err = bcm2048_set_power_state(bdev, BCM2048_POWER_ON);
1823 err = bcm2048_set_audio_route(bdev, BCM2048_AUDIO_ROUTE_DAC);
1827 err = bcm2048_set_dac_output(bdev, BCM2048_DAC_OUTPUT_LEFT |
1828 BCM2048_DAC_OUTPUT_RIGHT);
1835 * BCM2048 default deinitialization sequence
1837 static int bcm2048_deinit(struct bcm2048_device *bdev)
1841 err = bcm2048_set_audio_route(bdev, 0);
1845 err = bcm2048_set_dac_output(bdev, 0);
1849 err = bcm2048_set_power_state(bdev, BCM2048_POWER_OFF);
1858 * BCM2048 probe sequence
1860 static int bcm2048_probe(struct bcm2048_device *bdev)
1864 err = bcm2048_set_power_state(bdev, BCM2048_POWER_ON);
1868 err = bcm2048_checkrev(bdev);
1872 err = bcm2048_set_mute(bdev, BCM2048_DEFAULT_MUTE);
1876 err = bcm2048_set_region(bdev, BCM2048_DEFAULT_REGION);
1880 err = bcm2048_set_fm_search_rssi_threshold(bdev,
1881 BCM2048_DEFAULT_RSSI_THRESHOLD);
1885 err = bcm2048_set_fm_automatic_stereo_mono(bdev, BCM2048_ITEM_ENABLED);
1889 err = bcm2048_get_rds_wline(bdev);
1890 if (err < BCM2048_DEFAULT_RDS_WLINE)
1891 err = bcm2048_set_rds_wline(bdev, BCM2048_DEFAULT_RDS_WLINE);
1895 err = bcm2048_set_power_state(bdev, BCM2048_POWER_OFF);
1897 init_waitqueue_head(&bdev->read_queue);
1898 bdev->rds_data_available = 0;
1907 * BCM2048 workqueue handler
1909 static void bcm2048_work(struct work_struct *work)
1911 struct bcm2048_device *bdev;
1912 u8 flag_lsb, flag_msb, flags;
1914 bdev = container_of(work, struct bcm2048_device, work);
1915 bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_FLAG0, &flag_lsb);
1916 bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_FLAG1, &flag_msb);
1918 if (flag_lsb & (BCM2048_FM_FLAG_SEARCH_TUNE_FINISHED |
1919 BCM2048_FM_FLAG_SEARCH_TUNE_FAIL)) {
1921 if (flag_lsb & BCM2048_FM_FLAG_SEARCH_TUNE_FAIL)
1922 bdev->scan_state = BCM2048_SCAN_FAIL;
1924 bdev->scan_state = BCM2048_SCAN_OK;
1926 complete(&bdev->compl);
1929 if (flag_msb & BCM2048_RDS_FLAG_FIFO_WLINE) {
1930 bcm2048_rds_fifo_receive(bdev);
1931 if (bdev->rds_state) {
1932 flags = BCM2048_RDS_FLAG_FIFO_WLINE;
1933 bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_MASK1,
1936 bdev->rds_data_available = 1;
1937 bdev->rd_index = 0; /* new data, new start */
1942 * BCM2048 interrupt handler
1944 static irqreturn_t bcm2048_handler(int irq, void *dev)
1946 struct bcm2048_device *bdev = dev;
1948 dev_dbg(&bdev->client->dev, "IRQ called, queuing work\n");
1949 if (bdev->power_state)
1950 schedule_work(&bdev->work);
1956 * BCM2048 sysfs interface definitions
1958 #define property_write(prop, type, mask, check) \
1959 static ssize_t bcm2048_##prop##_write(struct device *dev, \
1960 struct device_attribute *attr, \
1964 struct bcm2048_device *bdev = dev_get_drvdata(dev); \
1971 if (sscanf(buf, mask, &value) != 1) \
1977 err = bcm2048_set_##prop(bdev, value); \
1979 return err < 0 ? err : count; \
1982 #define property_read(prop, size, mask) \
1983 static ssize_t bcm2048_##prop##_read(struct device *dev, \
1984 struct device_attribute *attr, \
1987 struct bcm2048_device *bdev = dev_get_drvdata(dev); \
1993 value = bcm2048_get_##prop(bdev); \
1996 value = sprintf(buf, mask "\n", value); \
2001 #define property_signed_read(prop, size, mask) \
2002 static ssize_t bcm2048_##prop##_read(struct device *dev, \
2003 struct device_attribute *attr, \
2006 struct bcm2048_device *bdev = dev_get_drvdata(dev); \
2012 value = bcm2048_get_##prop(bdev); \
2014 value = sprintf(buf, mask "\n", value); \
2019 #define DEFINE_SYSFS_PROPERTY(prop, signal, size, mask, check) \
2020 property_write(prop, signal size, mask, check) \
2021 property_read(prop, size, mask)
2023 #define property_str_read(prop, size) \
2024 static ssize_t bcm2048_##prop##_read(struct device *dev, \
2025 struct device_attribute *attr, \
2028 struct bcm2048_device *bdev = dev_get_drvdata(dev); \
2035 out = kzalloc(size + 1, GFP_KERNEL); \
2039 bcm2048_get_##prop(bdev, out); \
2040 count = sprintf(buf, "%s\n", out); \
2047 DEFINE_SYSFS_PROPERTY(power_state, unsigned, int, "%u", 0)
2048 DEFINE_SYSFS_PROPERTY(mute, unsigned, int, "%u", 0)
2049 DEFINE_SYSFS_PROPERTY(audio_route, unsigned, int, "%u", 0)
2050 DEFINE_SYSFS_PROPERTY(dac_output, unsigned, int, "%u", 0)
2052 DEFINE_SYSFS_PROPERTY(fm_hi_lo_injection, unsigned, int, "%u", 0)
2053 DEFINE_SYSFS_PROPERTY(fm_frequency, unsigned, int, "%u", 0)
2054 DEFINE_SYSFS_PROPERTY(fm_af_frequency, unsigned, int, "%u", 0)
2055 DEFINE_SYSFS_PROPERTY(fm_deemphasis, unsigned, int, "%u", 0)
2056 DEFINE_SYSFS_PROPERTY(fm_rds_mask, unsigned, int, "%u", 0)
2057 DEFINE_SYSFS_PROPERTY(fm_best_tune_mode, unsigned, int, "%u", 0)
2058 DEFINE_SYSFS_PROPERTY(fm_search_rssi_threshold, unsigned, int, "%u", 0)
2059 DEFINE_SYSFS_PROPERTY(fm_search_mode_direction, unsigned, int, "%u", 0)
2060 DEFINE_SYSFS_PROPERTY(fm_search_tune_mode, unsigned, int, "%u", value > 3)
2062 DEFINE_SYSFS_PROPERTY(rds, unsigned, int, "%u", 0)
2063 DEFINE_SYSFS_PROPERTY(rds_b_block_mask, unsigned, int, "%u", 0)
2064 DEFINE_SYSFS_PROPERTY(rds_b_block_match, unsigned, int, "%u", 0)
2065 DEFINE_SYSFS_PROPERTY(rds_pi_mask, unsigned, int, "%u", 0)
2066 DEFINE_SYSFS_PROPERTY(rds_pi_match, unsigned, int, "%u", 0)
2067 DEFINE_SYSFS_PROPERTY(rds_wline, unsigned, int, "%u", 0)
2068 property_read(rds_pi, unsigned int, "%x")
2069 property_str_read(rds_rt, (BCM2048_MAX_RDS_RT + 1))
2070 property_str_read(rds_ps, (BCM2048_MAX_RDS_PS + 1))
2072 property_read(fm_rds_flags, unsigned int, "%u")
2073 property_str_read(rds_data, BCM2048_MAX_RDS_RADIO_TEXT*5)
2075 property_read(region_bottom_frequency, unsigned int, "%u")
2076 property_read(region_top_frequency, unsigned int, "%u")
2077 property_signed_read(fm_carrier_error, int, "%d")
2078 property_signed_read(fm_rssi, int, "%d")
2079 DEFINE_SYSFS_PROPERTY(region, unsigned, int, "%u", 0)
2081 static struct device_attribute attrs[] = {
2082 __ATTR(power_state, S_IRUGO | S_IWUSR, bcm2048_power_state_read,
2083 bcm2048_power_state_write),
2084 __ATTR(mute, S_IRUGO | S_IWUSR, bcm2048_mute_read,
2085 bcm2048_mute_write),
2086 __ATTR(audio_route, S_IRUGO | S_IWUSR, bcm2048_audio_route_read,
2087 bcm2048_audio_route_write),
2088 __ATTR(dac_output, S_IRUGO | S_IWUSR, bcm2048_dac_output_read,
2089 bcm2048_dac_output_write),
2090 __ATTR(fm_hi_lo_injection, S_IRUGO | S_IWUSR,
2091 bcm2048_fm_hi_lo_injection_read,
2092 bcm2048_fm_hi_lo_injection_write),
2093 __ATTR(fm_frequency, S_IRUGO | S_IWUSR, bcm2048_fm_frequency_read,
2094 bcm2048_fm_frequency_write),
2095 __ATTR(fm_af_frequency, S_IRUGO | S_IWUSR,
2096 bcm2048_fm_af_frequency_read,
2097 bcm2048_fm_af_frequency_write),
2098 __ATTR(fm_deemphasis, S_IRUGO | S_IWUSR, bcm2048_fm_deemphasis_read,
2099 bcm2048_fm_deemphasis_write),
2100 __ATTR(fm_rds_mask, S_IRUGO | S_IWUSR, bcm2048_fm_rds_mask_read,
2101 bcm2048_fm_rds_mask_write),
2102 __ATTR(fm_best_tune_mode, S_IRUGO | S_IWUSR,
2103 bcm2048_fm_best_tune_mode_read,
2104 bcm2048_fm_best_tune_mode_write),
2105 __ATTR(fm_search_rssi_threshold, S_IRUGO | S_IWUSR,
2106 bcm2048_fm_search_rssi_threshold_read,
2107 bcm2048_fm_search_rssi_threshold_write),
2108 __ATTR(fm_search_mode_direction, S_IRUGO | S_IWUSR,
2109 bcm2048_fm_search_mode_direction_read,
2110 bcm2048_fm_search_mode_direction_write),
2111 __ATTR(fm_search_tune_mode, S_IRUGO | S_IWUSR,
2112 bcm2048_fm_search_tune_mode_read,
2113 bcm2048_fm_search_tune_mode_write),
2114 __ATTR(rds, S_IRUGO | S_IWUSR, bcm2048_rds_read,
2116 __ATTR(rds_b_block_mask, S_IRUGO | S_IWUSR,
2117 bcm2048_rds_b_block_mask_read,
2118 bcm2048_rds_b_block_mask_write),
2119 __ATTR(rds_b_block_match, S_IRUGO | S_IWUSR,
2120 bcm2048_rds_b_block_match_read,
2121 bcm2048_rds_b_block_match_write),
2122 __ATTR(rds_pi_mask, S_IRUGO | S_IWUSR, bcm2048_rds_pi_mask_read,
2123 bcm2048_rds_pi_mask_write),
2124 __ATTR(rds_pi_match, S_IRUGO | S_IWUSR, bcm2048_rds_pi_match_read,
2125 bcm2048_rds_pi_match_write),
2126 __ATTR(rds_wline, S_IRUGO | S_IWUSR, bcm2048_rds_wline_read,
2127 bcm2048_rds_wline_write),
2128 __ATTR(rds_pi, S_IRUGO, bcm2048_rds_pi_read, NULL),
2129 __ATTR(rds_rt, S_IRUGO, bcm2048_rds_rt_read, NULL),
2130 __ATTR(rds_ps, S_IRUGO, bcm2048_rds_ps_read, NULL),
2131 __ATTR(fm_rds_flags, S_IRUGO, bcm2048_fm_rds_flags_read, NULL),
2132 __ATTR(region_bottom_frequency, S_IRUGO,
2133 bcm2048_region_bottom_frequency_read, NULL),
2134 __ATTR(region_top_frequency, S_IRUGO,
2135 bcm2048_region_top_frequency_read, NULL),
2136 __ATTR(fm_carrier_error, S_IRUGO,
2137 bcm2048_fm_carrier_error_read, NULL),
2138 __ATTR(fm_rssi, S_IRUGO,
2139 bcm2048_fm_rssi_read, NULL),
2140 __ATTR(region, S_IRUGO | S_IWUSR, bcm2048_region_read,
2141 bcm2048_region_write),
2142 __ATTR(rds_data, S_IRUGO, bcm2048_rds_data_read, NULL),
2145 static int bcm2048_sysfs_unregister_properties(struct bcm2048_device *bdev,
2150 for (i = 0; i < size; i++)
2151 device_remove_file(&bdev->client->dev, &attrs[i]);
2156 static int bcm2048_sysfs_register_properties(struct bcm2048_device *bdev)
2161 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
2162 if (device_create_file(&bdev->client->dev, &attrs[i]) != 0) {
2163 dev_err(&bdev->client->dev,
2164 "could not register sysfs entry\n");
2166 bcm2048_sysfs_unregister_properties(bdev, i);
2175 static int bcm2048_fops_open(struct file *file)
2177 struct bcm2048_device *bdev = video_drvdata(file);
2181 bdev->rds_data_available = 0;
2186 static int bcm2048_fops_release(struct file *file)
2188 struct bcm2048_device *bdev = video_drvdata(file);
2195 static unsigned int bcm2048_fops_poll(struct file *file,
2196 struct poll_table_struct *pts)
2198 struct bcm2048_device *bdev = video_drvdata(file);
2201 poll_wait(file, &bdev->read_queue, pts);
2203 if (bdev->rds_data_available)
2204 retval = POLLIN | POLLRDNORM;
2209 static ssize_t bcm2048_fops_read(struct file *file, char __user *buf,
2210 size_t count, loff_t *ppos)
2212 struct bcm2048_device *bdev = video_drvdata(file);
2216 /* we return at least 3 bytes, one block */
2217 count = (count / 3) * 3; /* only multiples of 3 */
2221 while (!bdev->rds_data_available) {
2222 if (file->f_flags & O_NONBLOCK) {
2223 retval = -EWOULDBLOCK;
2226 /* interruptible_sleep_on(&bdev->read_queue); */
2227 if (wait_event_interruptible(bdev->read_queue,
2228 bdev->rds_data_available) < 0) {
2234 mutex_lock(&bdev->mutex);
2235 /* copy data to userspace */
2236 i = bdev->fifo_size - bdev->rd_index;
2238 count = (i / 3) * 3;
2242 unsigned char tmpbuf[3];
2244 tmpbuf[i] = bdev->rds_info.radio_text[bdev->rd_index+i+2];
2245 tmpbuf[i+1] = bdev->rds_info.radio_text[bdev->rd_index+i+1];
2246 tmpbuf[i+2] = (bdev->rds_info.radio_text[bdev->rd_index + i] & 0xf0) >> 4;
2247 if ((bdev->rds_info.radio_text[bdev->rd_index+i] &
2248 BCM2048_RDS_CRC_MASK) == BCM2048_RDS_CRC_UNRECOVARABLE)
2249 tmpbuf[i+2] |= 0x80;
2250 if (copy_to_user(buf+i, tmpbuf, 3)) {
2257 bdev->rd_index += i;
2258 if (bdev->rd_index >= bdev->fifo_size)
2259 bdev->rds_data_available = 0;
2261 mutex_unlock(&bdev->mutex);
2270 * bcm2048_fops - file operations interface
2272 static const struct v4l2_file_operations bcm2048_fops = {
2273 .owner = THIS_MODULE,
2274 .unlocked_ioctl = video_ioctl2,
2275 /* for RDS read support */
2276 .open = bcm2048_fops_open,
2277 .release = bcm2048_fops_release,
2278 .read = bcm2048_fops_read,
2279 .poll = bcm2048_fops_poll
2283 * Video4Linux Interface
2285 static struct v4l2_queryctrl bcm2048_v4l2_queryctrl[] = {
2287 .id = V4L2_CID_AUDIO_VOLUME,
2288 .flags = V4L2_CTRL_FLAG_DISABLED,
2291 .id = V4L2_CID_AUDIO_BALANCE,
2292 .flags = V4L2_CTRL_FLAG_DISABLED,
2295 .id = V4L2_CID_AUDIO_BASS,
2296 .flags = V4L2_CTRL_FLAG_DISABLED,
2299 .id = V4L2_CID_AUDIO_TREBLE,
2300 .flags = V4L2_CTRL_FLAG_DISABLED,
2303 .id = V4L2_CID_AUDIO_MUTE,
2304 .type = V4L2_CTRL_TYPE_BOOLEAN,
2312 .id = V4L2_CID_AUDIO_LOUDNESS,
2313 .flags = V4L2_CTRL_FLAG_DISABLED,
2317 static int bcm2048_vidioc_querycap(struct file *file, void *priv,
2318 struct v4l2_capability *capability)
2320 struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
2322 strlcpy(capability->driver, BCM2048_DRIVER_NAME,
2323 sizeof(capability->driver));
2324 strlcpy(capability->card, BCM2048_DRIVER_CARD,
2325 sizeof(capability->card));
2326 snprintf(capability->bus_info, 32, "I2C: 0x%X", bdev->client->addr);
2327 capability->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO |
2328 V4L2_CAP_HW_FREQ_SEEK;
2329 capability->capabilities = capability->device_caps |
2330 V4L2_CAP_DEVICE_CAPS;
2335 static int bcm2048_vidioc_g_input(struct file *filp, void *priv,
2343 static int bcm2048_vidioc_s_input(struct file *filp, void *priv,
2352 static int bcm2048_vidioc_queryctrl(struct file *file, void *priv,
2353 struct v4l2_queryctrl *qc)
2357 for (i = 0; i < ARRAY_SIZE(bcm2048_v4l2_queryctrl); i++) {
2358 if (qc->id && qc->id == bcm2048_v4l2_queryctrl[i].id) {
2359 *qc = bcm2048_v4l2_queryctrl[i];
2367 static int bcm2048_vidioc_g_ctrl(struct file *file, void *priv,
2368 struct v4l2_control *ctrl)
2370 struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
2377 case V4L2_CID_AUDIO_MUTE:
2378 err = bcm2048_get_mute(bdev);
2387 static int bcm2048_vidioc_s_ctrl(struct file *file, void *priv,
2388 struct v4l2_control *ctrl)
2390 struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
2397 case V4L2_CID_AUDIO_MUTE:
2399 if (bdev->power_state) {
2400 err = bcm2048_set_mute(bdev, ctrl->value);
2401 err |= bcm2048_deinit(bdev);
2404 if (!bdev->power_state) {
2405 err = bcm2048_init(bdev);
2406 err |= bcm2048_set_mute(bdev, ctrl->value);
2415 static int bcm2048_vidioc_g_audio(struct file *file, void *priv,
2416 struct v4l2_audio *audio)
2418 if (audio->index > 1)
2421 strncpy(audio->name, "Radio", 32);
2422 audio->capability = V4L2_AUDCAP_STEREO;
2427 static int bcm2048_vidioc_s_audio(struct file *file, void *priv,
2428 const struct v4l2_audio *audio)
2430 if (audio->index != 0)
2436 static int bcm2048_vidioc_g_tuner(struct file *file, void *priv,
2437 struct v4l2_tuner *tuner)
2439 struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
2446 if (tuner->index > 0)
2449 strncpy(tuner->name, "FM Receiver", 32);
2450 tuner->type = V4L2_TUNER_RADIO;
2452 dev_to_v4l2(bcm2048_get_region_bottom_frequency(bdev));
2454 dev_to_v4l2(bcm2048_get_region_top_frequency(bdev));
2455 tuner->rxsubchans = V4L2_TUNER_SUB_STEREO;
2456 tuner->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW;
2457 tuner->audmode = V4L2_TUNER_MODE_STEREO;
2459 if (bdev->power_state) {
2461 * Report frequencies with high carrier errors to have zero
2464 f_error = bcm2048_get_fm_carrier_error(bdev);
2465 if (f_error < BCM2048_FREQ_ERROR_FLOOR ||
2466 f_error > BCM2048_FREQ_ERROR_ROOF) {
2470 * RSSI level -60 dB is defined to report full
2473 rssi = bcm2048_get_fm_rssi(bdev);
2474 if (rssi >= BCM2048_RSSI_LEVEL_BASE) {
2475 tuner->signal = 0xFFFF;
2476 } else if (rssi > BCM2048_RSSI_LEVEL_ROOF) {
2477 tuner->signal = (rssi +
2478 BCM2048_RSSI_LEVEL_ROOF_NEG)
2479 * BCM2048_SIGNAL_MULTIPLIER;
2491 static int bcm2048_vidioc_s_tuner(struct file *file, void *priv,
2492 const struct v4l2_tuner *tuner)
2494 struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
2499 if (tuner->index > 0)
2505 static int bcm2048_vidioc_g_frequency(struct file *file, void *priv,
2506 struct v4l2_frequency *freq)
2508 struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
2512 if (!bdev->power_state)
2515 freq->type = V4L2_TUNER_RADIO;
2516 f = bcm2048_get_fm_frequency(bdev);
2521 freq->frequency = dev_to_v4l2(f);
2526 static int bcm2048_vidioc_s_frequency(struct file *file, void *priv,
2527 const struct v4l2_frequency *freq)
2529 struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
2532 if (freq->type != V4L2_TUNER_RADIO)
2535 if (!bdev->power_state)
2538 err = bcm2048_set_fm_frequency(bdev, v4l2_to_dev(freq->frequency));
2539 err |= bcm2048_set_fm_search_tune_mode(bdev, BCM2048_FM_PRE_SET_MODE);
2544 static int bcm2048_vidioc_s_hw_freq_seek(struct file *file, void *priv,
2545 const struct v4l2_hw_freq_seek *seek)
2547 struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
2550 if (!bdev->power_state)
2553 if ((seek->tuner != 0) || (seek->type != V4L2_TUNER_RADIO))
2556 err = bcm2048_set_fm_search_mode_direction(bdev, seek->seek_upward);
2557 err |= bcm2048_set_fm_search_tune_mode(bdev,
2558 BCM2048_FM_AUTO_SEARCH_MODE);
2563 static struct v4l2_ioctl_ops bcm2048_ioctl_ops = {
2564 .vidioc_querycap = bcm2048_vidioc_querycap,
2565 .vidioc_g_input = bcm2048_vidioc_g_input,
2566 .vidioc_s_input = bcm2048_vidioc_s_input,
2567 .vidioc_queryctrl = bcm2048_vidioc_queryctrl,
2568 .vidioc_g_ctrl = bcm2048_vidioc_g_ctrl,
2569 .vidioc_s_ctrl = bcm2048_vidioc_s_ctrl,
2570 .vidioc_g_audio = bcm2048_vidioc_g_audio,
2571 .vidioc_s_audio = bcm2048_vidioc_s_audio,
2572 .vidioc_g_tuner = bcm2048_vidioc_g_tuner,
2573 .vidioc_s_tuner = bcm2048_vidioc_s_tuner,
2574 .vidioc_g_frequency = bcm2048_vidioc_g_frequency,
2575 .vidioc_s_frequency = bcm2048_vidioc_s_frequency,
2576 .vidioc_s_hw_freq_seek = bcm2048_vidioc_s_hw_freq_seek,
2580 * bcm2048_viddev_template - video device interface
2582 static struct video_device bcm2048_viddev_template = {
2583 .fops = &bcm2048_fops,
2584 .name = BCM2048_DRIVER_NAME,
2585 .release = video_device_release_empty,
2586 .ioctl_ops = &bcm2048_ioctl_ops,
2590 * I2C driver interface
2592 static int bcm2048_i2c_driver_probe(struct i2c_client *client,
2593 const struct i2c_device_id *id)
2595 struct bcm2048_device *bdev;
2598 bdev = kzalloc(sizeof(*bdev), GFP_KERNEL);
2604 bdev->client = client;
2605 i2c_set_clientdata(client, bdev);
2606 mutex_init(&bdev->mutex);
2607 init_completion(&bdev->compl);
2608 INIT_WORK(&bdev->work, bcm2048_work);
2611 err = request_irq(client->irq,
2612 bcm2048_handler, IRQF_TRIGGER_FALLING,
2613 client->name, bdev);
2615 dev_err(&client->dev, "Could not request IRQ\n");
2618 dev_dbg(&client->dev, "IRQ requested.\n");
2620 dev_dbg(&client->dev, "IRQ not configured. Using timeouts.\n");
2623 bdev->videodev = bcm2048_viddev_template;
2624 video_set_drvdata(&bdev->videodev, bdev);
2625 if (video_register_device(&bdev->videodev, VFL_TYPE_RADIO, radio_nr)) {
2626 dev_dbg(&client->dev, "Could not register video device.\n");
2631 err = bcm2048_sysfs_register_properties(bdev);
2633 dev_dbg(&client->dev, "Could not register sysfs interface.\n");
2634 goto free_registration;
2637 err = bcm2048_probe(bdev);
2639 dev_dbg(&client->dev, "Failed to probe device information.\n");
2646 bcm2048_sysfs_unregister_properties(bdev, ARRAY_SIZE(attrs));
2648 video_unregister_device(&bdev->videodev);
2651 free_irq(client->irq, bdev);
2653 i2c_set_clientdata(client, NULL);
2659 static int __exit bcm2048_i2c_driver_remove(struct i2c_client *client)
2661 struct bcm2048_device *bdev = i2c_get_clientdata(client);
2663 if (!client->adapter)
2667 bcm2048_sysfs_unregister_properties(bdev, ARRAY_SIZE(attrs));
2668 video_unregister_device(&bdev->videodev);
2670 if (bdev->power_state)
2671 bcm2048_set_power_state(bdev, BCM2048_POWER_OFF);
2673 if (client->irq > 0)
2674 free_irq(client->irq, bdev);
2676 cancel_work_sync(&bdev->work);
2685 * bcm2048_i2c_driver - i2c driver interface
2687 static const struct i2c_device_id bcm2048_id[] = {
2691 MODULE_DEVICE_TABLE(i2c, bcm2048_id);
2693 static struct i2c_driver bcm2048_i2c_driver = {
2695 .name = BCM2048_DRIVER_NAME,
2697 .probe = bcm2048_i2c_driver_probe,
2698 .remove = __exit_p(bcm2048_i2c_driver_remove),
2699 .id_table = bcm2048_id,
2702 module_i2c_driver(bcm2048_i2c_driver);
2704 MODULE_LICENSE("GPL");
2705 MODULE_AUTHOR(BCM2048_DRIVER_AUTHOR);
2706 MODULE_DESCRIPTION(BCM2048_DRIVER_DESC);
2707 MODULE_VERSION("0.0.2");