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,
348 * I2C Interface read / write
350 static int bcm2048_send_command(struct bcm2048_device *bdev, unsigned int reg,
353 struct i2c_client *client = bdev->client;
356 if (!bdev->power_state) {
357 dev_err(&bdev->client->dev, "bcm2048: chip not powered!\n");
361 data[0] = reg & 0xff;
362 data[1] = value & 0xff;
364 if (i2c_master_send(client, data, 2) == 2)
367 dev_err(&bdev->client->dev, "BCM I2C error!\n");
368 dev_err(&bdev->client->dev, "Is Bluetooth up and running?\n");
372 static int bcm2048_recv_command(struct bcm2048_device *bdev, unsigned int reg,
375 struct i2c_client *client = bdev->client;
377 if (!bdev->power_state) {
378 dev_err(&bdev->client->dev, "bcm2048: chip not powered!\n");
382 value[0] = i2c_smbus_read_byte_data(client, reg & 0xff);
387 static int bcm2048_recv_duples(struct bcm2048_device *bdev, unsigned int reg,
388 u8 *value, u8 duples)
390 struct i2c_client *client = bdev->client;
391 struct i2c_adapter *adap = client->adapter;
392 struct i2c_msg msg[2];
395 if (!bdev->power_state) {
396 dev_err(&bdev->client->dev, "bcm2048: chip not powered!\n");
402 msg[0].addr = client->addr;
403 msg[0].flags = client->flags & I2C_M_TEN;
407 msg[1].addr = client->addr;
408 msg[1].flags = client->flags & I2C_M_TEN;
409 msg[1].flags |= I2C_M_RD;
413 return i2c_transfer(adap, msg, 2);
417 * BCM2048 - I2C register programming helpers
419 static int bcm2048_set_power_state(struct bcm2048_device *bdev, u8 power)
423 mutex_lock(&bdev->mutex);
426 bdev->power_state = BCM2048_POWER_ON;
427 bdev->cache_fm_rds_system |= BCM2048_FM_ON;
429 bdev->cache_fm_rds_system &= ~BCM2048_FM_ON;
433 * Warning! FM cannot be turned off because then
434 * the I2C communications get ruined!
435 * Comment off the "if (power)" when the chip works!
438 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM,
439 bdev->cache_fm_rds_system);
440 msleep(BCM2048_DEFAULT_POWERING_DELAY);
443 bdev->power_state = BCM2048_POWER_OFF;
445 mutex_unlock(&bdev->mutex);
449 static int bcm2048_get_power_state(struct bcm2048_device *bdev)
454 mutex_lock(&bdev->mutex);
456 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM, &value);
458 mutex_unlock(&bdev->mutex);
460 if (!err && (value & BCM2048_FM_ON))
461 return BCM2048_POWER_ON;
466 static int bcm2048_set_rds_no_lock(struct bcm2048_device *bdev, u8 rds_on)
471 bdev->cache_fm_rds_system &= ~BCM2048_RDS_ON;
474 bdev->cache_fm_rds_system |= BCM2048_RDS_ON;
475 bdev->rds_state = BCM2048_RDS_ON;
476 flags = BCM2048_RDS_FLAG_FIFO_WLINE;
477 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_MASK1,
482 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_MASK1,
484 memset(&bdev->rds_info, 0, sizeof(bdev->rds_info));
487 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM,
488 bdev->cache_fm_rds_system);
493 static int bcm2048_get_rds_no_lock(struct bcm2048_device *bdev)
498 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM, &value);
500 if (!err && (value & BCM2048_RDS_ON))
501 return BCM2048_ITEM_ENABLED;
506 static int bcm2048_set_rds(struct bcm2048_device *bdev, u8 rds_on)
510 mutex_lock(&bdev->mutex);
512 err = bcm2048_set_rds_no_lock(bdev, rds_on);
514 mutex_unlock(&bdev->mutex);
518 static int bcm2048_get_rds(struct bcm2048_device *bdev)
522 mutex_lock(&bdev->mutex);
524 err = bcm2048_get_rds_no_lock(bdev);
526 mutex_unlock(&bdev->mutex);
530 static int bcm2048_get_rds_pi(struct bcm2048_device *bdev)
532 return bdev->rds_info.rds_pi;
535 static int bcm2048_set_fm_automatic_stereo_mono(struct bcm2048_device *bdev,
540 mutex_lock(&bdev->mutex);
542 bdev->cache_fm_ctrl &= ~BCM2048_STEREO_MONO_AUTO_SELECT;
545 bdev->cache_fm_ctrl |= BCM2048_STEREO_MONO_AUTO_SELECT;
547 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_CTRL,
548 bdev->cache_fm_ctrl);
550 mutex_unlock(&bdev->mutex);
554 static int bcm2048_set_fm_hi_lo_injection(struct bcm2048_device *bdev,
559 mutex_lock(&bdev->mutex);
561 bdev->cache_fm_ctrl &= ~BCM2048_HI_LO_INJECTION;
564 bdev->cache_fm_ctrl |= BCM2048_HI_LO_INJECTION;
566 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_CTRL,
567 bdev->cache_fm_ctrl);
569 mutex_unlock(&bdev->mutex);
573 static int bcm2048_get_fm_hi_lo_injection(struct bcm2048_device *bdev)
578 mutex_lock(&bdev->mutex);
580 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_CTRL, &value);
582 mutex_unlock(&bdev->mutex);
584 if (!err && (value & BCM2048_HI_LO_INJECTION))
585 return BCM2048_ITEM_ENABLED;
590 static int bcm2048_set_fm_frequency(struct bcm2048_device *bdev, u32 frequency)
594 if (frequency < bdev->region_info.bottom_frequency ||
595 frequency > bdev->region_info.top_frequency)
598 frequency -= BCM2048_FREQUENCY_BASE;
600 mutex_lock(&bdev->mutex);
602 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_FREQ0, lsb(frequency));
603 err |= bcm2048_send_command(bdev, BCM2048_I2C_FM_FREQ1,
607 bdev->frequency = frequency;
609 mutex_unlock(&bdev->mutex);
613 static int bcm2048_get_fm_frequency(struct bcm2048_device *bdev)
618 mutex_lock(&bdev->mutex);
620 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_FREQ0, &lsb);
621 err |= bcm2048_recv_command(bdev, BCM2048_I2C_FM_FREQ1, &msb);
623 mutex_unlock(&bdev->mutex);
628 err = compose_u16(msb, lsb);
629 err += BCM2048_FREQUENCY_BASE;
634 static int bcm2048_set_fm_af_frequency(struct bcm2048_device *bdev,
639 if (frequency < bdev->region_info.bottom_frequency ||
640 frequency > bdev->region_info.top_frequency)
643 frequency -= BCM2048_FREQUENCY_BASE;
645 mutex_lock(&bdev->mutex);
647 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AF_FREQ0,
649 err |= bcm2048_send_command(bdev, BCM2048_I2C_FM_AF_FREQ1,
652 bdev->frequency = frequency;
654 mutex_unlock(&bdev->mutex);
658 static int bcm2048_get_fm_af_frequency(struct bcm2048_device *bdev)
663 mutex_lock(&bdev->mutex);
665 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AF_FREQ0, &lsb);
666 err |= bcm2048_recv_command(bdev, BCM2048_I2C_FM_AF_FREQ1, &msb);
668 mutex_unlock(&bdev->mutex);
673 err = compose_u16(msb, lsb);
674 err += BCM2048_FREQUENCY_BASE;
679 static int bcm2048_set_fm_deemphasis(struct bcm2048_device *bdev, int d)
684 if (d == BCM2048_DE_EMPHASIS_75us)
685 deemphasis = BCM2048_DE_EMPHASIS_SELECT;
689 mutex_lock(&bdev->mutex);
691 bdev->cache_fm_audio_ctrl0 &= ~BCM2048_DE_EMPHASIS_SELECT;
692 bdev->cache_fm_audio_ctrl0 |= deemphasis;
694 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
695 bdev->cache_fm_audio_ctrl0);
698 bdev->region_info.deemphasis = d;
700 mutex_unlock(&bdev->mutex);
705 static int bcm2048_get_fm_deemphasis(struct bcm2048_device *bdev)
710 mutex_lock(&bdev->mutex);
712 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0, &value);
714 mutex_unlock(&bdev->mutex);
717 if (value & BCM2048_DE_EMPHASIS_SELECT)
718 return BCM2048_DE_EMPHASIS_75us;
720 return BCM2048_DE_EMPHASIS_50us;
726 static int bcm2048_set_region(struct bcm2048_device *bdev, u8 region)
729 u32 new_frequency = 0;
731 if (region >= ARRAY_SIZE(region_configs))
734 mutex_lock(&bdev->mutex);
735 bdev->region_info = region_configs[region];
737 if (region_configs[region].bottom_frequency < 87500)
738 bdev->cache_fm_ctrl |= BCM2048_BAND_SELECT;
740 bdev->cache_fm_ctrl &= ~BCM2048_BAND_SELECT;
742 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_CTRL,
743 bdev->cache_fm_ctrl);
745 mutex_unlock(&bdev->mutex);
748 mutex_unlock(&bdev->mutex);
750 if (bdev->frequency < region_configs[region].bottom_frequency ||
751 bdev->frequency > region_configs[region].top_frequency)
752 new_frequency = region_configs[region].bottom_frequency;
754 if (new_frequency > 0) {
755 err = bcm2048_set_fm_frequency(bdev, new_frequency);
761 err = bcm2048_set_fm_deemphasis(bdev,
762 region_configs[region].deemphasis);
768 static int bcm2048_get_region(struct bcm2048_device *bdev)
772 mutex_lock(&bdev->mutex);
773 err = bdev->region_info.region;
774 mutex_unlock(&bdev->mutex);
779 static int bcm2048_set_mute(struct bcm2048_device *bdev, u16 mute)
783 mutex_lock(&bdev->mutex);
785 bdev->cache_fm_audio_ctrl0 &= ~(BCM2048_RF_MUTE | BCM2048_MANUAL_MUTE);
788 bdev->cache_fm_audio_ctrl0 |= (BCM2048_RF_MUTE |
789 BCM2048_MANUAL_MUTE);
791 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
792 bdev->cache_fm_audio_ctrl0);
795 bdev->mute_state = mute;
797 mutex_unlock(&bdev->mutex);
801 static int bcm2048_get_mute(struct bcm2048_device *bdev)
806 mutex_lock(&bdev->mutex);
808 if (bdev->power_state) {
809 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
812 err = value & (BCM2048_RF_MUTE | BCM2048_MANUAL_MUTE);
814 err = bdev->mute_state;
817 mutex_unlock(&bdev->mutex);
821 static int bcm2048_set_audio_route(struct bcm2048_device *bdev, u8 route)
825 mutex_lock(&bdev->mutex);
827 route &= (BCM2048_AUDIO_ROUTE_DAC | BCM2048_AUDIO_ROUTE_I2S);
828 bdev->cache_fm_audio_ctrl0 &= ~(BCM2048_AUDIO_ROUTE_DAC |
829 BCM2048_AUDIO_ROUTE_I2S);
830 bdev->cache_fm_audio_ctrl0 |= route;
832 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
833 bdev->cache_fm_audio_ctrl0);
835 mutex_unlock(&bdev->mutex);
839 static int bcm2048_get_audio_route(struct bcm2048_device *bdev)
844 mutex_lock(&bdev->mutex);
846 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0, &value);
848 mutex_unlock(&bdev->mutex);
851 return value & (BCM2048_AUDIO_ROUTE_DAC |
852 BCM2048_AUDIO_ROUTE_I2S);
857 static int bcm2048_set_dac_output(struct bcm2048_device *bdev, u8 channels)
861 mutex_lock(&bdev->mutex);
863 bdev->cache_fm_audio_ctrl0 &= ~(BCM2048_DAC_OUTPUT_LEFT |
864 BCM2048_DAC_OUTPUT_RIGHT);
865 bdev->cache_fm_audio_ctrl0 |= channels;
867 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0,
868 bdev->cache_fm_audio_ctrl0);
870 mutex_unlock(&bdev->mutex);
874 static int bcm2048_get_dac_output(struct bcm2048_device *bdev)
879 mutex_lock(&bdev->mutex);
881 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_AUDIO_CTRL0, &value);
883 mutex_unlock(&bdev->mutex);
886 return value & (BCM2048_DAC_OUTPUT_LEFT |
887 BCM2048_DAC_OUTPUT_RIGHT);
892 static int bcm2048_set_fm_search_rssi_threshold(struct bcm2048_device *bdev,
897 mutex_lock(&bdev->mutex);
899 threshold &= BCM2048_SEARCH_RSSI_THRESHOLD;
900 bdev->cache_fm_search_ctrl0 &= ~BCM2048_SEARCH_RSSI_THRESHOLD;
901 bdev->cache_fm_search_ctrl0 |= threshold;
903 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_SEARCH_CTRL0,
904 bdev->cache_fm_search_ctrl0);
906 mutex_unlock(&bdev->mutex);
910 static int bcm2048_get_fm_search_rssi_threshold(struct bcm2048_device *bdev)
915 mutex_lock(&bdev->mutex);
917 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_SEARCH_CTRL0, &value);
919 mutex_unlock(&bdev->mutex);
922 return value & BCM2048_SEARCH_RSSI_THRESHOLD;
927 static int bcm2048_set_fm_search_mode_direction(struct bcm2048_device *bdev,
932 mutex_lock(&bdev->mutex);
934 bdev->cache_fm_search_ctrl0 &= ~BCM2048_SEARCH_DIRECTION;
937 bdev->cache_fm_search_ctrl0 |= BCM2048_SEARCH_DIRECTION;
939 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_SEARCH_CTRL0,
940 bdev->cache_fm_search_ctrl0);
942 mutex_unlock(&bdev->mutex);
946 static int bcm2048_get_fm_search_mode_direction(struct bcm2048_device *bdev)
951 mutex_lock(&bdev->mutex);
953 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_SEARCH_CTRL0, &value);
955 mutex_unlock(&bdev->mutex);
957 if (!err && (value & BCM2048_SEARCH_DIRECTION))
958 return BCM2048_SEARCH_DIRECTION_UP;
963 static int bcm2048_set_fm_search_tune_mode(struct bcm2048_device *bdev,
966 int err, timeout, restart_rds = 0;
969 value = mode & BCM2048_FM_AUTO_SEARCH;
971 flags = BCM2048_FM_FLAG_SEARCH_TUNE_FINISHED |
972 BCM2048_FM_FLAG_SEARCH_TUNE_FAIL;
974 mutex_lock(&bdev->mutex);
977 * If RDS is enabled, and frequency is changed, RDS quits working.
978 * Thus, always restart RDS if it's enabled. Moreover, RDS must
979 * not be enabled while changing the frequency because it can
980 * provide a race to the mutex from the workqueue handler if RDS
981 * IRQ occurs while waiting for frequency changed IRQ.
983 if (bcm2048_get_rds_no_lock(bdev)) {
984 err = bcm2048_set_rds_no_lock(bdev, 0);
990 err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_MASK0, flags);
995 bcm2048_send_command(bdev, BCM2048_I2C_FM_SEARCH_TUNE_MODE, value);
997 if (mode != BCM2048_FM_AUTO_SEARCH_MODE)
998 timeout = BCM2048_DEFAULT_TIMEOUT;
1000 timeout = BCM2048_AUTO_SEARCH_TIMEOUT;
1002 if (!wait_for_completion_timeout(&bdev->compl,
1003 msecs_to_jiffies(timeout)))
1004 dev_err(&bdev->client->dev, "IRQ timeout.\n");
1007 if (!bdev->scan_state)
1012 err |= bcm2048_set_rds_no_lock(bdev, 1);
1014 mutex_unlock(&bdev->mutex);
1019 static int bcm2048_get_fm_search_tune_mode(struct bcm2048_device *bdev)
1024 mutex_lock(&bdev->mutex);
1026 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_SEARCH_TUNE_MODE,
1029 mutex_unlock(&bdev->mutex);
1032 return value & BCM2048_FM_AUTO_SEARCH;
1037 static int bcm2048_set_rds_b_block_mask(struct bcm2048_device *bdev, u16 mask)
1041 mutex_lock(&bdev->mutex);
1043 err = bcm2048_send_command(bdev,
1044 BCM2048_I2C_RDS_BLKB_MASK0, lsb(mask));
1045 err |= bcm2048_send_command(bdev,
1046 BCM2048_I2C_RDS_BLKB_MASK1, msb(mask));
1048 mutex_unlock(&bdev->mutex);
1052 static int bcm2048_get_rds_b_block_mask(struct bcm2048_device *bdev)
1057 mutex_lock(&bdev->mutex);
1059 err = bcm2048_recv_command(bdev,
1060 BCM2048_I2C_RDS_BLKB_MASK0, &lsb);
1061 err |= bcm2048_recv_command(bdev,
1062 BCM2048_I2C_RDS_BLKB_MASK1, &msb);
1064 mutex_unlock(&bdev->mutex);
1067 return compose_u16(msb, lsb);
1072 static int bcm2048_set_rds_b_block_match(struct bcm2048_device *bdev,
1077 mutex_lock(&bdev->mutex);
1079 err = bcm2048_send_command(bdev,
1080 BCM2048_I2C_RDS_BLKB_MATCH0, lsb(match));
1081 err |= bcm2048_send_command(bdev,
1082 BCM2048_I2C_RDS_BLKB_MATCH1, msb(match));
1084 mutex_unlock(&bdev->mutex);
1088 static int bcm2048_get_rds_b_block_match(struct bcm2048_device *bdev)
1093 mutex_lock(&bdev->mutex);
1095 err = bcm2048_recv_command(bdev,
1096 BCM2048_I2C_RDS_BLKB_MATCH0, &lsb);
1097 err |= bcm2048_recv_command(bdev,
1098 BCM2048_I2C_RDS_BLKB_MATCH1, &msb);
1100 mutex_unlock(&bdev->mutex);
1103 return compose_u16(msb, lsb);
1108 static int bcm2048_set_rds_pi_mask(struct bcm2048_device *bdev, u16 mask)
1112 mutex_lock(&bdev->mutex);
1114 err = bcm2048_send_command(bdev,
1115 BCM2048_I2C_RDS_PI_MASK0, lsb(mask));
1116 err |= bcm2048_send_command(bdev,
1117 BCM2048_I2C_RDS_PI_MASK1, msb(mask));
1119 mutex_unlock(&bdev->mutex);
1123 static int bcm2048_get_rds_pi_mask(struct bcm2048_device *bdev)
1128 mutex_lock(&bdev->mutex);
1130 err = bcm2048_recv_command(bdev,
1131 BCM2048_I2C_RDS_PI_MASK0, &lsb);
1132 err |= bcm2048_recv_command(bdev,
1133 BCM2048_I2C_RDS_PI_MASK1, &msb);
1135 mutex_unlock(&bdev->mutex);
1138 return compose_u16(msb, lsb);
1143 static int bcm2048_set_rds_pi_match(struct bcm2048_device *bdev, u16 match)
1147 mutex_lock(&bdev->mutex);
1149 err = bcm2048_send_command(bdev,
1150 BCM2048_I2C_RDS_PI_MATCH0, lsb(match));
1151 err |= bcm2048_send_command(bdev,
1152 BCM2048_I2C_RDS_PI_MATCH1, msb(match));
1154 mutex_unlock(&bdev->mutex);
1158 static int bcm2048_get_rds_pi_match(struct bcm2048_device *bdev)
1163 mutex_lock(&bdev->mutex);
1165 err = bcm2048_recv_command(bdev,
1166 BCM2048_I2C_RDS_PI_MATCH0, &lsb);
1167 err |= bcm2048_recv_command(bdev,
1168 BCM2048_I2C_RDS_PI_MATCH1, &msb);
1170 mutex_unlock(&bdev->mutex);
1173 return compose_u16(msb, lsb);
1178 static int bcm2048_set_fm_rds_mask(struct bcm2048_device *bdev, u16 mask)
1182 mutex_lock(&bdev->mutex);
1184 err = bcm2048_send_command(bdev,
1185 BCM2048_I2C_FM_RDS_MASK0, lsb(mask));
1186 err |= bcm2048_send_command(bdev,
1187 BCM2048_I2C_FM_RDS_MASK1, msb(mask));
1189 mutex_unlock(&bdev->mutex);
1193 static int bcm2048_get_fm_rds_mask(struct bcm2048_device *bdev)
1198 mutex_lock(&bdev->mutex);
1200 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_MASK0, &value0);
1201 err |= bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_MASK1, &value1);
1203 mutex_unlock(&bdev->mutex);
1206 return compose_u16(value1, value0);
1211 static int bcm2048_get_fm_rds_flags(struct bcm2048_device *bdev)
1216 mutex_lock(&bdev->mutex);
1218 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_FLAG0, &value0);
1219 err |= bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_FLAG1, &value1);
1221 mutex_unlock(&bdev->mutex);
1224 return compose_u16(value1, value0);
1229 static int bcm2048_get_region_bottom_frequency(struct bcm2048_device *bdev)
1231 return bdev->region_info.bottom_frequency;
1234 static int bcm2048_get_region_top_frequency(struct bcm2048_device *bdev)
1236 return bdev->region_info.top_frequency;
1239 static int bcm2048_set_fm_best_tune_mode(struct bcm2048_device *bdev, u8 mode)
1244 mutex_lock(&bdev->mutex);
1246 /* Perform read as the manual indicates */
1247 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_BEST_TUNE_MODE,
1249 value &= ~BCM2048_BEST_TUNE_MODE;
1252 value |= BCM2048_BEST_TUNE_MODE;
1253 err |= bcm2048_send_command(bdev, BCM2048_I2C_FM_BEST_TUNE_MODE,
1256 mutex_unlock(&bdev->mutex);
1260 static int bcm2048_get_fm_best_tune_mode(struct bcm2048_device *bdev)
1265 mutex_lock(&bdev->mutex);
1267 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_BEST_TUNE_MODE,
1270 mutex_unlock(&bdev->mutex);
1272 if (!err && (value & BCM2048_BEST_TUNE_MODE))
1273 return BCM2048_ITEM_ENABLED;
1278 static int bcm2048_get_fm_carrier_error(struct bcm2048_device *bdev)
1283 mutex_lock(&bdev->mutex);
1284 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_CARRIER, &value);
1285 mutex_unlock(&bdev->mutex);
1293 static int bcm2048_get_fm_rssi(struct bcm2048_device *bdev)
1298 mutex_lock(&bdev->mutex);
1299 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RSSI, &value);
1300 mutex_unlock(&bdev->mutex);
1308 static int bcm2048_set_rds_wline(struct bcm2048_device *bdev, u8 wline)
1312 mutex_lock(&bdev->mutex);
1314 err = bcm2048_send_command(bdev, BCM2048_I2C_RDS_WLINE, wline);
1317 bdev->fifo_size = wline;
1319 mutex_unlock(&bdev->mutex);
1323 static int bcm2048_get_rds_wline(struct bcm2048_device *bdev)
1328 mutex_lock(&bdev->mutex);
1330 err = bcm2048_recv_command(bdev, BCM2048_I2C_RDS_WLINE, &value);
1332 mutex_unlock(&bdev->mutex);
1335 bdev->fifo_size = value;
1342 static int bcm2048_checkrev(struct bcm2048_device *bdev)
1347 mutex_lock(&bdev->mutex);
1349 err = bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_REV, &version);
1351 mutex_unlock(&bdev->mutex);
1354 dev_info(&bdev->client->dev, "BCM2048 Version 0x%x\n",
1362 static int bcm2048_get_rds_rt(struct bcm2048_device *bdev, char *data)
1364 int err = 0, i, j = 0, ce = 0, cr = 0;
1365 char data_buffer[BCM2048_MAX_RDS_RT+1];
1367 mutex_lock(&bdev->mutex);
1369 if (!bdev->rds_info.text_len) {
1374 for (i = 0; i < BCM2048_MAX_RDS_RT; i++) {
1375 if (bdev->rds_info.rds_rt[i]) {
1377 /* Skip the carriage return */
1378 if (bdev->rds_info.rds_rt[i] != 0x0d) {
1379 data_buffer[j++] = bdev->rds_info.rds_rt[i];
1387 if (j <= BCM2048_MAX_RDS_RT)
1390 for (i = 0; i < BCM2048_MAX_RDS_RT; i++) {
1391 if (!bdev->rds_info.rds_rt[i]) {
1392 if (cr && (i < cr)) {
1397 if (cr && (i >= cr))
1405 memcpy(data, data_buffer, sizeof(data_buffer));
1408 mutex_unlock(&bdev->mutex);
1412 static int bcm2048_get_rds_ps(struct bcm2048_device *bdev, char *data)
1414 int err = 0, i, j = 0;
1415 char data_buffer[BCM2048_MAX_RDS_PS+1];
1417 mutex_lock(&bdev->mutex);
1419 if (!bdev->rds_info.text_len) {
1424 for (i = 0; i < BCM2048_MAX_RDS_PS; i++) {
1425 if (bdev->rds_info.rds_ps[i]) {
1426 data_buffer[j++] = bdev->rds_info.rds_ps[i];
1428 if (i < (BCM2048_MAX_RDS_PS - 1)) {
1435 if (j <= BCM2048_MAX_RDS_PS)
1438 memcpy(data, data_buffer, sizeof(data_buffer));
1441 mutex_unlock(&bdev->mutex);
1445 static void bcm2048_parse_rds_pi(struct bcm2048_device *bdev)
1450 for (i = 0; i < bdev->fifo_size; i += BCM2048_RDS_FIFO_DUPLE_SIZE) {
1452 /* Block A match, only data without crc errors taken */
1453 if (bdev->rds_info.radio_text[i] == BCM2048_RDS_BLOCK_A) {
1455 pi = (bdev->rds_info.radio_text[i+1] << 8) +
1456 bdev->rds_info.radio_text[i+2];
1458 if (!bdev->rds_info.rds_pi) {
1459 bdev->rds_info.rds_pi = pi;
1462 if (pi != bdev->rds_info.rds_pi) {
1465 bdev->rds_info.rds_pi = pi;
1475 static int bcm2048_rds_block_crc(struct bcm2048_device *bdev, int i)
1477 return bdev->rds_info.radio_text[i] & BCM2048_RDS_CRC_MASK;
1480 static void bcm2048_parse_rds_rt_block(struct bcm2048_device *bdev, int i,
1483 /* Good data will overwrite poor data */
1485 if (!bdev->rds_info.rds_rt[index])
1486 bdev->rds_info.rds_rt[index] =
1487 bdev->rds_info.radio_text[i+1];
1488 if (!bdev->rds_info.rds_rt[index+1])
1489 bdev->rds_info.rds_rt[index+1] =
1490 bdev->rds_info.radio_text[i+2];
1492 bdev->rds_info.rds_rt[index] = bdev->rds_info.radio_text[i+1];
1493 bdev->rds_info.rds_rt[index+1] =
1494 bdev->rds_info.radio_text[i+2];
1498 static int bcm2048_parse_rt_match_b(struct bcm2048_device *bdev, int i)
1500 int crc, rt_id, rt_group_b, rt_ab, index = 0;
1502 crc = bcm2048_rds_block_crc(bdev, i);
1504 if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
1507 if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
1508 BCM2048_RDS_BLOCK_B) {
1510 rt_id = bdev->rds_info.radio_text[i+1] &
1511 BCM2048_RDS_BLOCK_MASK;
1512 rt_group_b = bdev->rds_info.radio_text[i+1] &
1513 BCM2048_RDS_GROUP_AB_MASK;
1514 rt_ab = bdev->rds_info.radio_text[i+2] &
1515 BCM2048_RDS_RT_AB_MASK;
1517 if (rt_group_b != bdev->rds_info.rds_rt_group_b) {
1518 memset(bdev->rds_info.rds_rt, 0,
1519 sizeof(bdev->rds_info.rds_rt));
1520 bdev->rds_info.rds_rt_group_b = rt_group_b;
1523 if (rt_id == BCM2048_RDS_RT) {
1524 /* A to B or (vice versa), means: clear screen */
1525 if (rt_ab != bdev->rds_info.rds_rt_ab) {
1526 memset(bdev->rds_info.rds_rt, 0,
1527 sizeof(bdev->rds_info.rds_rt));
1528 bdev->rds_info.rds_rt_ab = rt_ab;
1531 index = bdev->rds_info.radio_text[i+2] &
1532 BCM2048_RDS_RT_INDEX;
1534 if (bdev->rds_info.rds_rt_group_b)
1546 static int bcm2048_parse_rt_match_c(struct bcm2048_device *bdev, int i,
1551 crc = bcm2048_rds_block_crc(bdev, i);
1553 if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
1556 BUG_ON((index+2) >= BCM2048_MAX_RDS_RT);
1558 if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
1559 BCM2048_RDS_BLOCK_C) {
1560 if (bdev->rds_info.rds_rt_group_b)
1562 bcm2048_parse_rds_rt_block(bdev, i, index, crc);
1569 static void bcm2048_parse_rt_match_d(struct bcm2048_device *bdev, int i,
1574 crc = bcm2048_rds_block_crc(bdev, i);
1576 if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
1579 BUG_ON((index+4) >= BCM2048_MAX_RDS_RT);
1581 if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
1582 BCM2048_RDS_BLOCK_D)
1583 bcm2048_parse_rds_rt_block(bdev, i, index+2, crc);
1586 static void bcm2048_parse_rds_rt(struct bcm2048_device *bdev)
1588 int i, index = 0, crc, match_b = 0, match_c = 0, match_d = 0;
1590 for (i = 0; i < bdev->fifo_size; i += BCM2048_RDS_FIFO_DUPLE_SIZE) {
1594 index = bcm2048_parse_rt_match_b(bdev, i);
1595 if (index >= 0 && index <= (BCM2048_MAX_RDS_RT - 5))
1598 } else if (match_c) {
1600 if (bcm2048_parse_rt_match_c(bdev, i, index))
1603 } else if (match_d) {
1605 bcm2048_parse_rt_match_d(bdev, i, index);
1609 /* Skip erroneous blocks due to messed up A block altogether */
1610 if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK)
1611 == BCM2048_RDS_BLOCK_A) {
1612 crc = bcm2048_rds_block_crc(bdev, i);
1613 if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
1615 /* Syncronize to a good RDS PI */
1616 if (((bdev->rds_info.radio_text[i+1] << 8) +
1617 bdev->rds_info.radio_text[i+2]) ==
1618 bdev->rds_info.rds_pi)
1624 static void bcm2048_parse_rds_ps_block(struct bcm2048_device *bdev, int i,
1627 /* Good data will overwrite poor data */
1629 if (!bdev->rds_info.rds_ps[index])
1630 bdev->rds_info.rds_ps[index] =
1631 bdev->rds_info.radio_text[i+1];
1632 if (!bdev->rds_info.rds_ps[index+1])
1633 bdev->rds_info.rds_ps[index+1] =
1634 bdev->rds_info.radio_text[i+2];
1636 bdev->rds_info.rds_ps[index] = bdev->rds_info.radio_text[i+1];
1637 bdev->rds_info.rds_ps[index+1] =
1638 bdev->rds_info.radio_text[i+2];
1642 static int bcm2048_parse_ps_match_c(struct bcm2048_device *bdev, int i,
1647 crc = bcm2048_rds_block_crc(bdev, i);
1649 if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
1652 if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
1653 BCM2048_RDS_BLOCK_C)
1659 static void bcm2048_parse_ps_match_d(struct bcm2048_device *bdev, int i,
1664 crc = bcm2048_rds_block_crc(bdev, i);
1666 if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
1669 if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
1670 BCM2048_RDS_BLOCK_D)
1671 bcm2048_parse_rds_ps_block(bdev, i, index, crc);
1674 static int bcm2048_parse_ps_match_b(struct bcm2048_device *bdev, int i)
1676 int crc, index, ps_id, ps_group;
1678 crc = bcm2048_rds_block_crc(bdev, i);
1680 if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
1683 /* Block B Radio PS match */
1684 if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK) ==
1685 BCM2048_RDS_BLOCK_B) {
1686 ps_id = bdev->rds_info.radio_text[i+1] &
1687 BCM2048_RDS_BLOCK_MASK;
1688 ps_group = bdev->rds_info.radio_text[i+1] &
1689 BCM2048_RDS_GROUP_AB_MASK;
1692 * Poor RSSI will lead to RDS data corruption
1693 * So using 3 (same) sequential values to justify major changes
1695 if (ps_group != bdev->rds_info.rds_ps_group) {
1696 if (crc == BCM2048_RDS_CRC_NONE) {
1697 bdev->rds_info.rds_ps_group_cnt++;
1698 if (bdev->rds_info.rds_ps_group_cnt > 2) {
1699 bdev->rds_info.rds_ps_group = ps_group;
1700 bdev->rds_info.rds_ps_group_cnt = 0;
1701 dev_err(&bdev->client->dev,
1702 "RDS PS Group change!\n");
1707 bdev->rds_info.rds_ps_group_cnt = 0;
1711 if (ps_id == BCM2048_RDS_PS) {
1712 index = bdev->rds_info.radio_text[i+2] &
1713 BCM2048_RDS_PS_INDEX;
1722 static void bcm2048_parse_rds_ps(struct bcm2048_device *bdev)
1724 int i, index = 0, crc, match_b = 0, match_c = 0, match_d = 0;
1726 for (i = 0; i < bdev->fifo_size; i += BCM2048_RDS_FIFO_DUPLE_SIZE) {
1730 index = bcm2048_parse_ps_match_b(bdev, i);
1731 if (index >= 0 && index < (BCM2048_MAX_RDS_PS - 1))
1734 } else if (match_c) {
1736 if (bcm2048_parse_ps_match_c(bdev, i, index))
1739 } else if (match_d) {
1741 bcm2048_parse_ps_match_d(bdev, i, index);
1745 /* Skip erroneous blocks due to messed up A block altogether */
1746 if ((bdev->rds_info.radio_text[i] & BCM2048_RDS_BLOCK_MASK)
1747 == BCM2048_RDS_BLOCK_A) {
1748 crc = bcm2048_rds_block_crc(bdev, i);
1749 if (crc == BCM2048_RDS_CRC_UNRECOVARABLE)
1751 /* Syncronize to a good RDS PI */
1752 if (((bdev->rds_info.radio_text[i+1] << 8) +
1753 bdev->rds_info.radio_text[i+2]) ==
1754 bdev->rds_info.rds_pi)
1760 static void bcm2048_rds_fifo_receive(struct bcm2048_device *bdev)
1764 mutex_lock(&bdev->mutex);
1766 err = bcm2048_recv_duples(bdev, BCM2048_I2C_RDS_DATA,
1767 bdev->rds_info.radio_text, bdev->fifo_size);
1769 dev_err(&bdev->client->dev, "RDS Read problem\n");
1770 mutex_unlock(&bdev->mutex);
1774 bdev->rds_info.text_len = bdev->fifo_size;
1776 bcm2048_parse_rds_pi(bdev);
1777 bcm2048_parse_rds_rt(bdev);
1778 bcm2048_parse_rds_ps(bdev);
1780 mutex_unlock(&bdev->mutex);
1782 wake_up_interruptible(&bdev->read_queue);
1785 static int bcm2048_get_rds_data(struct bcm2048_device *bdev, char *data)
1787 int err = 0, i, p = 0;
1790 mutex_lock(&bdev->mutex);
1792 if (!bdev->rds_info.text_len) {
1797 data_buffer = kcalloc(BCM2048_MAX_RDS_RADIO_TEXT, 5, GFP_KERNEL);
1803 for (i = 0; i < bdev->rds_info.text_len; i++) {
1804 p += sprintf(data_buffer+p, "%x ",
1805 bdev->rds_info.radio_text[i]);
1808 memcpy(data, data_buffer, p);
1812 mutex_unlock(&bdev->mutex);
1817 * BCM2048 default initialization sequence
1819 static int bcm2048_init(struct bcm2048_device *bdev)
1823 err = bcm2048_set_power_state(bdev, BCM2048_POWER_ON);
1827 err = bcm2048_set_audio_route(bdev, BCM2048_AUDIO_ROUTE_DAC);
1831 err = bcm2048_set_dac_output(bdev, BCM2048_DAC_OUTPUT_LEFT |
1832 BCM2048_DAC_OUTPUT_RIGHT);
1839 * BCM2048 default deinitialization sequence
1841 static int bcm2048_deinit(struct bcm2048_device *bdev)
1845 err = bcm2048_set_audio_route(bdev, 0);
1849 err = bcm2048_set_dac_output(bdev, 0);
1853 err = bcm2048_set_power_state(bdev, BCM2048_POWER_OFF);
1862 * BCM2048 probe sequence
1864 static int bcm2048_probe(struct bcm2048_device *bdev)
1868 err = bcm2048_set_power_state(bdev, BCM2048_POWER_ON);
1872 err = bcm2048_checkrev(bdev);
1876 err = bcm2048_set_mute(bdev, BCM2048_DEFAULT_MUTE);
1880 err = bcm2048_set_region(bdev, BCM2048_DEFAULT_REGION);
1884 err = bcm2048_set_fm_search_rssi_threshold(bdev,
1885 BCM2048_DEFAULT_RSSI_THRESHOLD);
1889 err = bcm2048_set_fm_automatic_stereo_mono(bdev, BCM2048_ITEM_ENABLED);
1893 err = bcm2048_get_rds_wline(bdev);
1894 if (err < BCM2048_DEFAULT_RDS_WLINE)
1895 err = bcm2048_set_rds_wline(bdev, BCM2048_DEFAULT_RDS_WLINE);
1899 err = bcm2048_set_power_state(bdev, BCM2048_POWER_OFF);
1901 init_waitqueue_head(&bdev->read_queue);
1902 bdev->rds_data_available = 0;
1911 * BCM2048 workqueue handler
1913 static void bcm2048_work(struct work_struct *work)
1915 struct bcm2048_device *bdev;
1916 u8 flag_lsb, flag_msb, flags;
1918 bdev = container_of(work, struct bcm2048_device, work);
1919 bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_FLAG0, &flag_lsb);
1920 bcm2048_recv_command(bdev, BCM2048_I2C_FM_RDS_FLAG1, &flag_msb);
1922 if (flag_lsb & (BCM2048_FM_FLAG_SEARCH_TUNE_FINISHED |
1923 BCM2048_FM_FLAG_SEARCH_TUNE_FAIL)) {
1925 if (flag_lsb & BCM2048_FM_FLAG_SEARCH_TUNE_FAIL)
1926 bdev->scan_state = BCM2048_SCAN_FAIL;
1928 bdev->scan_state = BCM2048_SCAN_OK;
1930 complete(&bdev->compl);
1933 if (flag_msb & BCM2048_RDS_FLAG_FIFO_WLINE) {
1934 bcm2048_rds_fifo_receive(bdev);
1935 if (bdev->rds_state) {
1936 flags = BCM2048_RDS_FLAG_FIFO_WLINE;
1937 bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_MASK1,
1940 bdev->rds_data_available = 1;
1941 bdev->rd_index = 0; /* new data, new start */
1946 * BCM2048 interrupt handler
1948 static irqreturn_t bcm2048_handler(int irq, void *dev)
1950 struct bcm2048_device *bdev = dev;
1952 dev_dbg(&bdev->client->dev, "IRQ called, queuing work\n");
1953 if (bdev->power_state)
1954 schedule_work(&bdev->work);
1960 * BCM2048 sysfs interface definitions
1962 #define property_write(prop, type, mask, check) \
1963 static ssize_t bcm2048_##prop##_write(struct device *dev, \
1964 struct device_attribute *attr, \
1968 struct bcm2048_device *bdev = dev_get_drvdata(dev); \
1975 if (sscanf(buf, mask, &value) != 1) \
1981 err = bcm2048_set_##prop(bdev, value); \
1983 return err < 0 ? err : count; \
1986 #define property_read(prop, size, mask) \
1987 static ssize_t bcm2048_##prop##_read(struct device *dev, \
1988 struct device_attribute *attr, \
1991 struct bcm2048_device *bdev = dev_get_drvdata(dev); \
1997 value = bcm2048_get_##prop(bdev); \
2000 value = sprintf(buf, mask "\n", value); \
2005 #define property_signed_read(prop, size, mask) \
2006 static ssize_t bcm2048_##prop##_read(struct device *dev, \
2007 struct device_attribute *attr, \
2010 struct bcm2048_device *bdev = dev_get_drvdata(dev); \
2016 value = bcm2048_get_##prop(bdev); \
2018 value = sprintf(buf, mask "\n", value); \
2023 #define DEFINE_SYSFS_PROPERTY(prop, signal, size, mask, check) \
2024 property_write(prop, signal size, mask, check) \
2025 property_read(prop, size, mask)
2027 #define property_str_read(prop, size) \
2028 static ssize_t bcm2048_##prop##_read(struct device *dev, \
2029 struct device_attribute *attr, \
2032 struct bcm2048_device *bdev = dev_get_drvdata(dev); \
2039 out = kzalloc(size + 1, GFP_KERNEL); \
2043 bcm2048_get_##prop(bdev, out); \
2044 count = sprintf(buf, "%s\n", out); \
2051 DEFINE_SYSFS_PROPERTY(power_state, unsigned, int, "%u", 0)
2052 DEFINE_SYSFS_PROPERTY(mute, unsigned, int, "%u", 0)
2053 DEFINE_SYSFS_PROPERTY(audio_route, unsigned, int, "%u", 0)
2054 DEFINE_SYSFS_PROPERTY(dac_output, unsigned, int, "%u", 0)
2056 DEFINE_SYSFS_PROPERTY(fm_hi_lo_injection, unsigned, int, "%u", 0)
2057 DEFINE_SYSFS_PROPERTY(fm_frequency, unsigned, int, "%u", 0)
2058 DEFINE_SYSFS_PROPERTY(fm_af_frequency, unsigned, int, "%u", 0)
2059 DEFINE_SYSFS_PROPERTY(fm_deemphasis, unsigned, int, "%u", 0)
2060 DEFINE_SYSFS_PROPERTY(fm_rds_mask, unsigned, int, "%u", 0)
2061 DEFINE_SYSFS_PROPERTY(fm_best_tune_mode, unsigned, int, "%u", 0)
2062 DEFINE_SYSFS_PROPERTY(fm_search_rssi_threshold, unsigned, int, "%u", 0)
2063 DEFINE_SYSFS_PROPERTY(fm_search_mode_direction, unsigned, int, "%u", 0)
2064 DEFINE_SYSFS_PROPERTY(fm_search_tune_mode, unsigned, int, "%u", value > 3)
2066 DEFINE_SYSFS_PROPERTY(rds, unsigned, int, "%u", 0)
2067 DEFINE_SYSFS_PROPERTY(rds_b_block_mask, unsigned, int, "%u", 0)
2068 DEFINE_SYSFS_PROPERTY(rds_b_block_match, unsigned, int, "%u", 0)
2069 DEFINE_SYSFS_PROPERTY(rds_pi_mask, unsigned, int, "%u", 0)
2070 DEFINE_SYSFS_PROPERTY(rds_pi_match, unsigned, int, "%u", 0)
2071 DEFINE_SYSFS_PROPERTY(rds_wline, unsigned, int, "%u", 0)
2072 property_read(rds_pi, unsigned int, "%x")
2073 property_str_read(rds_rt, (BCM2048_MAX_RDS_RT + 1))
2074 property_str_read(rds_ps, (BCM2048_MAX_RDS_PS + 1))
2076 property_read(fm_rds_flags, unsigned int, "%u")
2077 property_str_read(rds_data, BCM2048_MAX_RDS_RADIO_TEXT*5)
2079 property_read(region_bottom_frequency, unsigned int, "%u")
2080 property_read(region_top_frequency, unsigned int, "%u")
2081 property_signed_read(fm_carrier_error, int, "%d")
2082 property_signed_read(fm_rssi, int, "%d")
2083 DEFINE_SYSFS_PROPERTY(region, unsigned, int, "%u", 0)
2085 static struct device_attribute attrs[] = {
2086 __ATTR(power_state, S_IRUGO | S_IWUSR, bcm2048_power_state_read,
2087 bcm2048_power_state_write),
2088 __ATTR(mute, S_IRUGO | S_IWUSR, bcm2048_mute_read,
2089 bcm2048_mute_write),
2090 __ATTR(audio_route, S_IRUGO | S_IWUSR, bcm2048_audio_route_read,
2091 bcm2048_audio_route_write),
2092 __ATTR(dac_output, S_IRUGO | S_IWUSR, bcm2048_dac_output_read,
2093 bcm2048_dac_output_write),
2094 __ATTR(fm_hi_lo_injection, S_IRUGO | S_IWUSR,
2095 bcm2048_fm_hi_lo_injection_read,
2096 bcm2048_fm_hi_lo_injection_write),
2097 __ATTR(fm_frequency, S_IRUGO | S_IWUSR, bcm2048_fm_frequency_read,
2098 bcm2048_fm_frequency_write),
2099 __ATTR(fm_af_frequency, S_IRUGO | S_IWUSR,
2100 bcm2048_fm_af_frequency_read,
2101 bcm2048_fm_af_frequency_write),
2102 __ATTR(fm_deemphasis, S_IRUGO | S_IWUSR, bcm2048_fm_deemphasis_read,
2103 bcm2048_fm_deemphasis_write),
2104 __ATTR(fm_rds_mask, S_IRUGO | S_IWUSR, bcm2048_fm_rds_mask_read,
2105 bcm2048_fm_rds_mask_write),
2106 __ATTR(fm_best_tune_mode, S_IRUGO | S_IWUSR,
2107 bcm2048_fm_best_tune_mode_read,
2108 bcm2048_fm_best_tune_mode_write),
2109 __ATTR(fm_search_rssi_threshold, S_IRUGO | S_IWUSR,
2110 bcm2048_fm_search_rssi_threshold_read,
2111 bcm2048_fm_search_rssi_threshold_write),
2112 __ATTR(fm_search_mode_direction, S_IRUGO | S_IWUSR,
2113 bcm2048_fm_search_mode_direction_read,
2114 bcm2048_fm_search_mode_direction_write),
2115 __ATTR(fm_search_tune_mode, S_IRUGO | S_IWUSR,
2116 bcm2048_fm_search_tune_mode_read,
2117 bcm2048_fm_search_tune_mode_write),
2118 __ATTR(rds, S_IRUGO | S_IWUSR, bcm2048_rds_read,
2120 __ATTR(rds_b_block_mask, S_IRUGO | S_IWUSR,
2121 bcm2048_rds_b_block_mask_read,
2122 bcm2048_rds_b_block_mask_write),
2123 __ATTR(rds_b_block_match, S_IRUGO | S_IWUSR,
2124 bcm2048_rds_b_block_match_read,
2125 bcm2048_rds_b_block_match_write),
2126 __ATTR(rds_pi_mask, S_IRUGO | S_IWUSR, bcm2048_rds_pi_mask_read,
2127 bcm2048_rds_pi_mask_write),
2128 __ATTR(rds_pi_match, S_IRUGO | S_IWUSR, bcm2048_rds_pi_match_read,
2129 bcm2048_rds_pi_match_write),
2130 __ATTR(rds_wline, S_IRUGO | S_IWUSR, bcm2048_rds_wline_read,
2131 bcm2048_rds_wline_write),
2132 __ATTR(rds_pi, S_IRUGO, bcm2048_rds_pi_read, NULL),
2133 __ATTR(rds_rt, S_IRUGO, bcm2048_rds_rt_read, NULL),
2134 __ATTR(rds_ps, S_IRUGO, bcm2048_rds_ps_read, NULL),
2135 __ATTR(fm_rds_flags, S_IRUGO, bcm2048_fm_rds_flags_read, NULL),
2136 __ATTR(region_bottom_frequency, S_IRUGO,
2137 bcm2048_region_bottom_frequency_read, NULL),
2138 __ATTR(region_top_frequency, S_IRUGO,
2139 bcm2048_region_top_frequency_read, NULL),
2140 __ATTR(fm_carrier_error, S_IRUGO,
2141 bcm2048_fm_carrier_error_read, NULL),
2142 __ATTR(fm_rssi, S_IRUGO,
2143 bcm2048_fm_rssi_read, NULL),
2144 __ATTR(region, S_IRUGO | S_IWUSR, bcm2048_region_read,
2145 bcm2048_region_write),
2146 __ATTR(rds_data, S_IRUGO, bcm2048_rds_data_read, NULL),
2149 static int bcm2048_sysfs_unregister_properties(struct bcm2048_device *bdev,
2154 for (i = 0; i < size; i++)
2155 device_remove_file(&bdev->client->dev, &attrs[i]);
2160 static int bcm2048_sysfs_register_properties(struct bcm2048_device *bdev)
2165 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
2166 if (device_create_file(&bdev->client->dev, &attrs[i]) != 0) {
2167 dev_err(&bdev->client->dev,
2168 "could not register sysfs entry\n");
2170 bcm2048_sysfs_unregister_properties(bdev, i);
2179 static int bcm2048_fops_open(struct file *file)
2181 struct bcm2048_device *bdev = video_drvdata(file);
2185 bdev->rds_data_available = 0;
2190 static int bcm2048_fops_release(struct file *file)
2192 struct bcm2048_device *bdev = video_drvdata(file);
2199 static unsigned int bcm2048_fops_poll(struct file *file,
2200 struct poll_table_struct *pts)
2202 struct bcm2048_device *bdev = video_drvdata(file);
2205 poll_wait(file, &bdev->read_queue, pts);
2207 if (bdev->rds_data_available)
2208 retval = POLLIN | POLLRDNORM;
2213 static ssize_t bcm2048_fops_read(struct file *file, char __user *buf,
2214 size_t count, loff_t *ppos)
2216 struct bcm2048_device *bdev = video_drvdata(file);
2220 /* we return at least 3 bytes, one block */
2221 count = (count / 3) * 3; /* only multiples of 3 */
2225 while (!bdev->rds_data_available) {
2226 if (file->f_flags & O_NONBLOCK) {
2227 retval = -EWOULDBLOCK;
2230 /* interruptible_sleep_on(&bdev->read_queue); */
2231 if (wait_event_interruptible(bdev->read_queue,
2232 bdev->rds_data_available) < 0) {
2238 mutex_lock(&bdev->mutex);
2239 /* copy data to userspace */
2240 i = bdev->fifo_size - bdev->rd_index;
2242 count = (i / 3) * 3;
2246 unsigned char tmpbuf[3];
2248 tmpbuf[i] = bdev->rds_info.radio_text[bdev->rd_index+i+2];
2249 tmpbuf[i+1] = bdev->rds_info.radio_text[bdev->rd_index+i+1];
2250 tmpbuf[i+2] = (bdev->rds_info.radio_text[bdev->rd_index + i] & 0xf0) >> 4;
2251 if ((bdev->rds_info.radio_text[bdev->rd_index+i] &
2252 BCM2048_RDS_CRC_MASK) == BCM2048_RDS_CRC_UNRECOVARABLE)
2253 tmpbuf[i+2] |= 0x80;
2254 if (copy_to_user(buf+i, tmpbuf, 3)) {
2261 bdev->rd_index += i;
2262 if (bdev->rd_index >= bdev->fifo_size)
2263 bdev->rds_data_available = 0;
2265 mutex_unlock(&bdev->mutex);
2274 * bcm2048_fops - file operations interface
2276 static const struct v4l2_file_operations bcm2048_fops = {
2277 .owner = THIS_MODULE,
2278 .unlocked_ioctl = video_ioctl2,
2279 /* for RDS read support */
2280 .open = bcm2048_fops_open,
2281 .release = bcm2048_fops_release,
2282 .read = bcm2048_fops_read,
2283 .poll = bcm2048_fops_poll
2287 * Video4Linux Interface
2289 static struct v4l2_queryctrl bcm2048_v4l2_queryctrl[] = {
2291 .id = V4L2_CID_AUDIO_VOLUME,
2292 .flags = V4L2_CTRL_FLAG_DISABLED,
2295 .id = V4L2_CID_AUDIO_BALANCE,
2296 .flags = V4L2_CTRL_FLAG_DISABLED,
2299 .id = V4L2_CID_AUDIO_BASS,
2300 .flags = V4L2_CTRL_FLAG_DISABLED,
2303 .id = V4L2_CID_AUDIO_TREBLE,
2304 .flags = V4L2_CTRL_FLAG_DISABLED,
2307 .id = V4L2_CID_AUDIO_MUTE,
2308 .type = V4L2_CTRL_TYPE_BOOLEAN,
2316 .id = V4L2_CID_AUDIO_LOUDNESS,
2317 .flags = V4L2_CTRL_FLAG_DISABLED,
2321 static int bcm2048_vidioc_querycap(struct file *file, void *priv,
2322 struct v4l2_capability *capability)
2324 struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
2326 strlcpy(capability->driver, BCM2048_DRIVER_NAME,
2327 sizeof(capability->driver));
2328 strlcpy(capability->card, BCM2048_DRIVER_CARD,
2329 sizeof(capability->card));
2330 snprintf(capability->bus_info, 32, "I2C: 0x%X", bdev->client->addr);
2331 capability->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO |
2332 V4L2_CAP_HW_FREQ_SEEK;
2333 capability->capabilities = capability->device_caps |
2334 V4L2_CAP_DEVICE_CAPS;
2339 static int bcm2048_vidioc_g_input(struct file *filp, void *priv,
2347 static int bcm2048_vidioc_s_input(struct file *filp, void *priv,
2356 static int bcm2048_vidioc_queryctrl(struct file *file, void *priv,
2357 struct v4l2_queryctrl *qc)
2361 for (i = 0; i < ARRAY_SIZE(bcm2048_v4l2_queryctrl); i++) {
2362 if (qc->id && qc->id == bcm2048_v4l2_queryctrl[i].id) {
2363 *qc = bcm2048_v4l2_queryctrl[i];
2371 static int bcm2048_vidioc_g_ctrl(struct file *file, void *priv,
2372 struct v4l2_control *ctrl)
2374 struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
2381 case V4L2_CID_AUDIO_MUTE:
2382 err = bcm2048_get_mute(bdev);
2391 static int bcm2048_vidioc_s_ctrl(struct file *file, void *priv,
2392 struct v4l2_control *ctrl)
2394 struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
2401 case V4L2_CID_AUDIO_MUTE:
2403 if (bdev->power_state) {
2404 err = bcm2048_set_mute(bdev, ctrl->value);
2405 err |= bcm2048_deinit(bdev);
2408 if (!bdev->power_state) {
2409 err = bcm2048_init(bdev);
2410 err |= bcm2048_set_mute(bdev, ctrl->value);
2419 static int bcm2048_vidioc_g_audio(struct file *file, void *priv,
2420 struct v4l2_audio *audio)
2422 if (audio->index > 1)
2425 strncpy(audio->name, "Radio", 32);
2426 audio->capability = V4L2_AUDCAP_STEREO;
2431 static int bcm2048_vidioc_s_audio(struct file *file, void *priv,
2432 const struct v4l2_audio *audio)
2434 if (audio->index != 0)
2440 static int bcm2048_vidioc_g_tuner(struct file *file, void *priv,
2441 struct v4l2_tuner *tuner)
2443 struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
2450 if (tuner->index > 0)
2453 strncpy(tuner->name, "FM Receiver", 32);
2454 tuner->type = V4L2_TUNER_RADIO;
2456 dev_to_v4l2(bcm2048_get_region_bottom_frequency(bdev));
2458 dev_to_v4l2(bcm2048_get_region_top_frequency(bdev));
2459 tuner->rxsubchans = V4L2_TUNER_SUB_STEREO;
2460 tuner->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW;
2461 tuner->audmode = V4L2_TUNER_MODE_STEREO;
2463 if (bdev->power_state) {
2465 * Report frequencies with high carrier errors to have zero
2468 f_error = bcm2048_get_fm_carrier_error(bdev);
2469 if (f_error < BCM2048_FREQ_ERROR_FLOOR ||
2470 f_error > BCM2048_FREQ_ERROR_ROOF) {
2474 * RSSI level -60 dB is defined to report full
2477 rssi = bcm2048_get_fm_rssi(bdev);
2478 if (rssi >= BCM2048_RSSI_LEVEL_BASE) {
2479 tuner->signal = 0xFFFF;
2480 } else if (rssi > BCM2048_RSSI_LEVEL_ROOF) {
2481 tuner->signal = (rssi +
2482 BCM2048_RSSI_LEVEL_ROOF_NEG)
2483 * BCM2048_SIGNAL_MULTIPLIER;
2495 static int bcm2048_vidioc_s_tuner(struct file *file, void *priv,
2496 const struct v4l2_tuner *tuner)
2498 struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
2503 if (tuner->index > 0)
2509 static int bcm2048_vidioc_g_frequency(struct file *file, void *priv,
2510 struct v4l2_frequency *freq)
2512 struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
2516 if (!bdev->power_state)
2519 freq->type = V4L2_TUNER_RADIO;
2520 f = bcm2048_get_fm_frequency(bdev);
2525 freq->frequency = dev_to_v4l2(f);
2530 static int bcm2048_vidioc_s_frequency(struct file *file, void *priv,
2531 const struct v4l2_frequency *freq)
2533 struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
2536 if (freq->type != V4L2_TUNER_RADIO)
2539 if (!bdev->power_state)
2542 err = bcm2048_set_fm_frequency(bdev, v4l2_to_dev(freq->frequency));
2543 err |= bcm2048_set_fm_search_tune_mode(bdev, BCM2048_FM_PRE_SET_MODE);
2548 static int bcm2048_vidioc_s_hw_freq_seek(struct file *file, void *priv,
2549 const struct v4l2_hw_freq_seek *seek)
2551 struct bcm2048_device *bdev = video_get_drvdata(video_devdata(file));
2554 if (!bdev->power_state)
2557 if ((seek->tuner != 0) || (seek->type != V4L2_TUNER_RADIO))
2560 err = bcm2048_set_fm_search_mode_direction(bdev, seek->seek_upward);
2561 err |= bcm2048_set_fm_search_tune_mode(bdev,
2562 BCM2048_FM_AUTO_SEARCH_MODE);
2567 static struct v4l2_ioctl_ops bcm2048_ioctl_ops = {
2568 .vidioc_querycap = bcm2048_vidioc_querycap,
2569 .vidioc_g_input = bcm2048_vidioc_g_input,
2570 .vidioc_s_input = bcm2048_vidioc_s_input,
2571 .vidioc_queryctrl = bcm2048_vidioc_queryctrl,
2572 .vidioc_g_ctrl = bcm2048_vidioc_g_ctrl,
2573 .vidioc_s_ctrl = bcm2048_vidioc_s_ctrl,
2574 .vidioc_g_audio = bcm2048_vidioc_g_audio,
2575 .vidioc_s_audio = bcm2048_vidioc_s_audio,
2576 .vidioc_g_tuner = bcm2048_vidioc_g_tuner,
2577 .vidioc_s_tuner = bcm2048_vidioc_s_tuner,
2578 .vidioc_g_frequency = bcm2048_vidioc_g_frequency,
2579 .vidioc_s_frequency = bcm2048_vidioc_s_frequency,
2580 .vidioc_s_hw_freq_seek = bcm2048_vidioc_s_hw_freq_seek,
2584 * bcm2048_viddev_template - video device interface
2586 static struct video_device bcm2048_viddev_template = {
2587 .fops = &bcm2048_fops,
2588 .name = BCM2048_DRIVER_NAME,
2589 .release = video_device_release_empty,
2590 .ioctl_ops = &bcm2048_ioctl_ops,
2594 * I2C driver interface
2596 static int bcm2048_i2c_driver_probe(struct i2c_client *client,
2597 const struct i2c_device_id *id)
2599 struct bcm2048_device *bdev;
2602 bdev = kzalloc(sizeof(*bdev), GFP_KERNEL);
2608 bdev->client = client;
2609 i2c_set_clientdata(client, bdev);
2610 mutex_init(&bdev->mutex);
2611 init_completion(&bdev->compl);
2612 INIT_WORK(&bdev->work, bcm2048_work);
2615 err = request_irq(client->irq,
2616 bcm2048_handler, IRQF_TRIGGER_FALLING,
2617 client->name, bdev);
2619 dev_err(&client->dev, "Could not request IRQ\n");
2622 dev_dbg(&client->dev, "IRQ requested.\n");
2624 dev_dbg(&client->dev, "IRQ not configured. Using timeouts.\n");
2627 bdev->videodev = bcm2048_viddev_template;
2628 video_set_drvdata(&bdev->videodev, bdev);
2629 if (video_register_device(&bdev->videodev, VFL_TYPE_RADIO, radio_nr)) {
2630 dev_dbg(&client->dev, "Could not register video device.\n");
2635 err = bcm2048_sysfs_register_properties(bdev);
2637 dev_dbg(&client->dev, "Could not register sysfs interface.\n");
2638 goto free_registration;
2641 err = bcm2048_probe(bdev);
2643 dev_dbg(&client->dev, "Failed to probe device information.\n");
2650 bcm2048_sysfs_unregister_properties(bdev, ARRAY_SIZE(attrs));
2652 video_unregister_device(&bdev->videodev);
2655 free_irq(client->irq, bdev);
2657 i2c_set_clientdata(client, NULL);
2663 static int __exit bcm2048_i2c_driver_remove(struct i2c_client *client)
2665 struct bcm2048_device *bdev = i2c_get_clientdata(client);
2667 if (!client->adapter)
2671 bcm2048_sysfs_unregister_properties(bdev, ARRAY_SIZE(attrs));
2672 video_unregister_device(&bdev->videodev);
2674 if (bdev->power_state)
2675 bcm2048_set_power_state(bdev, BCM2048_POWER_OFF);
2677 if (client->irq > 0)
2678 free_irq(client->irq, bdev);
2680 cancel_work_sync(&bdev->work);
2689 * bcm2048_i2c_driver - i2c driver interface
2691 static const struct i2c_device_id bcm2048_id[] = {
2695 MODULE_DEVICE_TABLE(i2c, bcm2048_id);
2697 static struct i2c_driver bcm2048_i2c_driver = {
2699 .name = BCM2048_DRIVER_NAME,
2701 .probe = bcm2048_i2c_driver_probe,
2702 .remove = __exit_p(bcm2048_i2c_driver_remove),
2703 .id_table = bcm2048_id,
2706 module_i2c_driver(bcm2048_i2c_driver);
2708 MODULE_LICENSE("GPL");
2709 MODULE_AUTHOR(BCM2048_DRIVER_AUTHOR);
2710 MODULE_DESCRIPTION(BCM2048_DRIVER_DESC);
2711 MODULE_VERSION("0.0.2");