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
182 #define BCM2048_FREQDEV_UNIT 10000
183 #define BCM2048_FREQV4L2_MULTI 625
184 #define dev_to_v4l2(f) ((f * BCM2048_FREQDEV_UNIT) / BCM2048_FREQV4L2_MULTI)
185 #define v4l2_to_dev(f) ((f * BCM2048_FREQV4L2_MULTI) / BCM2048_FREQDEV_UNIT)
187 #define msb(x) ((u8)((u16)x >> 8))
188 #define lsb(x) ((u8)((u16)x & 0x00FF))
189 #define compose_u16(msb, lsb) (((u16)msb << 8) | lsb)
191 #define BCM2048_DEFAULT_POWERING_DELAY 20
192 #define BCM2048_DEFAULT_REGION 0x02
193 #define BCM2048_DEFAULT_MUTE 0x01
194 #define BCM2048_DEFAULT_RSSI_THRESHOLD 0x64
195 #define BCM2048_DEFAULT_RDS_WLINE 0x7E
197 #define BCM2048_FM_SEARCH_INACTIVE 0x00
198 #define BCM2048_FM_PRE_SET_MODE 0x01
199 #define BCM2048_FM_AUTO_SEARCH_MODE 0x02
200 #define BCM2048_FM_AF_JUMP_MODE 0x03
202 #define BCM2048_FREQUENCY_BASE 64000
204 #define BCM2048_POWER_ON 0x01
205 #define BCM2048_POWER_OFF 0x00
207 #define BCM2048_ITEM_ENABLED 0x01
208 #define BCM2048_SEARCH_DIRECTION_UP 0x01
210 #define BCM2048_DE_EMPHASIS_75us 75
211 #define BCM2048_DE_EMPHASIS_50us 50
213 #define BCM2048_SCAN_FAIL 0x00
214 #define BCM2048_SCAN_OK 0x01
216 #define BCM2048_FREQ_ERROR_FLOOR -20
217 #define BCM2048_FREQ_ERROR_ROOF 20
219 /* -60 dB is reported as full signal strength */
220 #define BCM2048_RSSI_LEVEL_BASE -60
221 #define BCM2048_RSSI_LEVEL_ROOF -100
222 #define BCM2048_RSSI_LEVEL_ROOF_NEG 100
223 #define BCM2048_SIGNAL_MULTIPLIER (0xFFFF / \
224 (BCM2048_RSSI_LEVEL_ROOF_NEG + \
225 BCM2048_RSSI_LEVEL_BASE))
227 #define BCM2048_RDS_FIFO_DUPLE_SIZE 0x03
228 #define BCM2048_RDS_CRC_MASK 0x0F
229 #define BCM2048_RDS_CRC_NONE 0x00
230 #define BCM2048_RDS_CRC_MAX_2BITS 0x04
231 #define BCM2048_RDS_CRC_LEAST_2BITS 0x08
232 #define BCM2048_RDS_CRC_UNRECOVARABLE 0x0C
234 #define BCM2048_RDS_BLOCK_MASK 0xF0
235 #define BCM2048_RDS_BLOCK_A 0x00
236 #define BCM2048_RDS_BLOCK_B 0x10
237 #define BCM2048_RDS_BLOCK_C 0x20
238 #define BCM2048_RDS_BLOCK_D 0x30
239 #define BCM2048_RDS_BLOCK_C_SCORED 0x40
240 #define BCM2048_RDS_BLOCK_E 0x60
242 #define BCM2048_RDS_RT 0x20
243 #define BCM2048_RDS_PS 0x00
245 #define BCM2048_RDS_GROUP_AB_MASK 0x08
246 #define BCM2048_RDS_GROUP_A 0x00
247 #define BCM2048_RDS_GROUP_B 0x08
249 #define BCM2048_RDS_RT_AB_MASK 0x10
250 #define BCM2048_RDS_RT_A 0x00
251 #define BCM2048_RDS_RT_B 0x10
252 #define BCM2048_RDS_RT_INDEX 0x0F
254 #define BCM2048_RDS_PS_INDEX 0x03
258 #define BCM2048_MAX_RDS_RT (64 + 1)
259 u8 rds_rt
[BCM2048_MAX_RDS_RT
];
262 #define BCM2048_MAX_RDS_PS (8 + 1)
263 u8 rds_ps
[BCM2048_MAX_RDS_PS
];
266 #define BCM2048_MAX_RDS_RADIO_TEXT 255
267 u8 radio_text
[BCM2048_MAX_RDS_RADIO_TEXT
+ 3];
272 u32 bottom_frequency
;
279 struct bcm2048_device
{
280 struct i2c_client
*client
;
281 struct video_device videodev
;
282 struct work_struct work
;
283 struct completion
compl;
285 struct bcm2048_platform_data
*platform_data
;
286 struct rds_info rds_info
;
287 struct region_info region_info
;
289 u8 cache_fm_rds_system
;
291 u8 cache_fm_audio_ctrl0
;
292 u8 cache_fm_search_ctrl0
;
299 /* for rds data device read */
300 wait_queue_head_t read_queue
;
302 unsigned char rds_data_available
;
303 unsigned int rd_index
;
306 static int radio_nr
= -1; /* radio device minor (-1 ==> auto assign) */
307 module_param(radio_nr
, int, 0);
308 MODULE_PARM_DESC(radio_nr
,
309 "Minor number for radio device (-1 ==> auto assign)");
311 static const struct region_info region_configs
[] = {
314 .channel_spacing
= 20,
315 .bottom_frequency
= 87500,
316 .top_frequency
= 108000,
322 .channel_spacing
= 20,
323 .bottom_frequency
= 87500,
324 .top_frequency
= 108000,
330 .channel_spacing
= 10,
331 .bottom_frequency
= 87500,
332 .top_frequency
= 108000,
338 .channel_spacing
= 10,
339 .bottom_frequency
= 76000,
340 .top_frequency
= 90000,
347 * I2C Interface read / write
349 static int bcm2048_send_command(struct bcm2048_device
*bdev
, unsigned int reg
,
352 struct i2c_client
*client
= bdev
->client
;
355 if (!bdev
->power_state
) {
356 dev_err(&bdev
->client
->dev
, "bcm2048: chip not powered!\n");
360 data
[0] = reg
& 0xff;
361 data
[1] = value
& 0xff;
363 if (i2c_master_send(client
, data
, 2) == 2)
366 dev_err(&bdev
->client
->dev
, "BCM I2C error!\n");
367 dev_err(&bdev
->client
->dev
, "Is Bluetooth up and running?\n");
371 static int bcm2048_recv_command(struct bcm2048_device
*bdev
, unsigned int reg
,
374 struct i2c_client
*client
= bdev
->client
;
376 if (!bdev
->power_state
) {
377 dev_err(&bdev
->client
->dev
, "bcm2048: chip not powered!\n");
381 value
[0] = i2c_smbus_read_byte_data(client
, reg
& 0xff);
386 static int bcm2048_recv_duples(struct bcm2048_device
*bdev
, unsigned int reg
,
387 u8
*value
, u8 duples
)
389 struct i2c_client
*client
= bdev
->client
;
390 struct i2c_adapter
*adap
= client
->adapter
;
391 struct i2c_msg msg
[2];
394 if (!bdev
->power_state
) {
395 dev_err(&bdev
->client
->dev
, "bcm2048: chip not powered!\n");
401 msg
[0].addr
= client
->addr
;
402 msg
[0].flags
= client
->flags
& I2C_M_TEN
;
406 msg
[1].addr
= client
->addr
;
407 msg
[1].flags
= client
->flags
& I2C_M_TEN
;
408 msg
[1].flags
|= I2C_M_RD
;
412 return i2c_transfer(adap
, msg
, 2);
416 * BCM2048 - I2C register programming helpers
418 static int bcm2048_set_power_state(struct bcm2048_device
*bdev
, u8 power
)
422 mutex_lock(&bdev
->mutex
);
425 bdev
->power_state
= BCM2048_POWER_ON
;
426 bdev
->cache_fm_rds_system
|= BCM2048_FM_ON
;
428 bdev
->cache_fm_rds_system
&= ~BCM2048_FM_ON
;
432 * Warning! FM cannot be turned off because then
433 * the I2C communications get ruined!
434 * Comment off the "if (power)" when the chip works!
437 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_RDS_SYSTEM
,
438 bdev
->cache_fm_rds_system
);
439 msleep(BCM2048_DEFAULT_POWERING_DELAY
);
442 bdev
->power_state
= BCM2048_POWER_OFF
;
444 mutex_unlock(&bdev
->mutex
);
448 static int bcm2048_get_power_state(struct bcm2048_device
*bdev
)
453 mutex_lock(&bdev
->mutex
);
455 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_RDS_SYSTEM
, &value
);
457 mutex_unlock(&bdev
->mutex
);
459 if (!err
&& (value
& BCM2048_FM_ON
))
460 return BCM2048_POWER_ON
;
465 static int bcm2048_set_rds_no_lock(struct bcm2048_device
*bdev
, u8 rds_on
)
470 bdev
->cache_fm_rds_system
&= ~BCM2048_RDS_ON
;
473 bdev
->cache_fm_rds_system
|= BCM2048_RDS_ON
;
474 bdev
->rds_state
= BCM2048_RDS_ON
;
475 flags
= BCM2048_RDS_FLAG_FIFO_WLINE
;
476 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_RDS_MASK1
,
481 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_RDS_MASK1
,
483 memset(&bdev
->rds_info
, 0, sizeof(bdev
->rds_info
));
486 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_RDS_SYSTEM
,
487 bdev
->cache_fm_rds_system
);
492 static int bcm2048_get_rds_no_lock(struct bcm2048_device
*bdev
)
497 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_RDS_SYSTEM
, &value
);
499 if (!err
&& (value
& BCM2048_RDS_ON
))
500 return BCM2048_ITEM_ENABLED
;
505 static int bcm2048_set_rds(struct bcm2048_device
*bdev
, u8 rds_on
)
509 mutex_lock(&bdev
->mutex
);
511 err
= bcm2048_set_rds_no_lock(bdev
, rds_on
);
513 mutex_unlock(&bdev
->mutex
);
517 static int bcm2048_get_rds(struct bcm2048_device
*bdev
)
521 mutex_lock(&bdev
->mutex
);
523 err
= bcm2048_get_rds_no_lock(bdev
);
525 mutex_unlock(&bdev
->mutex
);
529 static int bcm2048_get_rds_pi(struct bcm2048_device
*bdev
)
531 return bdev
->rds_info
.rds_pi
;
534 static int bcm2048_set_fm_automatic_stereo_mono(struct bcm2048_device
*bdev
,
539 mutex_lock(&bdev
->mutex
);
541 bdev
->cache_fm_ctrl
&= ~BCM2048_STEREO_MONO_AUTO_SELECT
;
544 bdev
->cache_fm_ctrl
|= BCM2048_STEREO_MONO_AUTO_SELECT
;
546 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_CTRL
,
547 bdev
->cache_fm_ctrl
);
549 mutex_unlock(&bdev
->mutex
);
553 static int bcm2048_set_fm_hi_lo_injection(struct bcm2048_device
*bdev
,
558 mutex_lock(&bdev
->mutex
);
560 bdev
->cache_fm_ctrl
&= ~BCM2048_HI_LO_INJECTION
;
563 bdev
->cache_fm_ctrl
|= BCM2048_HI_LO_INJECTION
;
565 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_CTRL
,
566 bdev
->cache_fm_ctrl
);
568 mutex_unlock(&bdev
->mutex
);
572 static int bcm2048_get_fm_hi_lo_injection(struct bcm2048_device
*bdev
)
577 mutex_lock(&bdev
->mutex
);
579 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_CTRL
, &value
);
581 mutex_unlock(&bdev
->mutex
);
583 if (!err
&& (value
& BCM2048_HI_LO_INJECTION
))
584 return BCM2048_ITEM_ENABLED
;
589 static int bcm2048_set_fm_frequency(struct bcm2048_device
*bdev
, u32 frequency
)
593 if (frequency
< bdev
->region_info
.bottom_frequency
||
594 frequency
> bdev
->region_info
.top_frequency
)
597 frequency
-= BCM2048_FREQUENCY_BASE
;
599 mutex_lock(&bdev
->mutex
);
601 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_FREQ0
, lsb(frequency
));
602 err
|= bcm2048_send_command(bdev
, BCM2048_I2C_FM_FREQ1
,
606 bdev
->frequency
= frequency
;
608 mutex_unlock(&bdev
->mutex
);
612 static int bcm2048_get_fm_frequency(struct bcm2048_device
*bdev
)
617 mutex_lock(&bdev
->mutex
);
619 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_FREQ0
, &lsb
);
620 err
|= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_FREQ1
, &msb
);
622 mutex_unlock(&bdev
->mutex
);
627 err
= compose_u16(msb
, lsb
);
628 err
+= BCM2048_FREQUENCY_BASE
;
633 static int bcm2048_set_fm_af_frequency(struct bcm2048_device
*bdev
,
638 if (frequency
< bdev
->region_info
.bottom_frequency
||
639 frequency
> bdev
->region_info
.top_frequency
)
642 frequency
-= BCM2048_FREQUENCY_BASE
;
644 mutex_lock(&bdev
->mutex
);
646 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_AF_FREQ0
,
648 err
|= bcm2048_send_command(bdev
, BCM2048_I2C_FM_AF_FREQ1
,
651 bdev
->frequency
= frequency
;
653 mutex_unlock(&bdev
->mutex
);
657 static int bcm2048_get_fm_af_frequency(struct bcm2048_device
*bdev
)
662 mutex_lock(&bdev
->mutex
);
664 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_AF_FREQ0
, &lsb
);
665 err
|= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_AF_FREQ1
, &msb
);
667 mutex_unlock(&bdev
->mutex
);
672 err
= compose_u16(msb
, lsb
);
673 err
+= BCM2048_FREQUENCY_BASE
;
678 static int bcm2048_set_fm_deemphasis(struct bcm2048_device
*bdev
, int d
)
683 if (d
== BCM2048_DE_EMPHASIS_75us
)
684 deemphasis
= BCM2048_DE_EMPHASIS_SELECT
;
688 mutex_lock(&bdev
->mutex
);
690 bdev
->cache_fm_audio_ctrl0
&= ~BCM2048_DE_EMPHASIS_SELECT
;
691 bdev
->cache_fm_audio_ctrl0
|= deemphasis
;
693 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_AUDIO_CTRL0
,
694 bdev
->cache_fm_audio_ctrl0
);
697 bdev
->region_info
.deemphasis
= d
;
699 mutex_unlock(&bdev
->mutex
);
704 static int bcm2048_get_fm_deemphasis(struct bcm2048_device
*bdev
)
709 mutex_lock(&bdev
->mutex
);
711 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_AUDIO_CTRL0
, &value
);
713 mutex_unlock(&bdev
->mutex
);
716 if (value
& BCM2048_DE_EMPHASIS_SELECT
)
717 return BCM2048_DE_EMPHASIS_75us
;
719 return BCM2048_DE_EMPHASIS_50us
;
725 static int bcm2048_set_region(struct bcm2048_device
*bdev
, u8 region
)
728 u32 new_frequency
= 0;
730 if (region
>= ARRAY_SIZE(region_configs
))
733 mutex_lock(&bdev
->mutex
);
734 bdev
->region_info
= region_configs
[region
];
736 if (region_configs
[region
].bottom_frequency
< 87500)
737 bdev
->cache_fm_ctrl
|= BCM2048_BAND_SELECT
;
739 bdev
->cache_fm_ctrl
&= ~BCM2048_BAND_SELECT
;
741 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_CTRL
,
742 bdev
->cache_fm_ctrl
);
744 mutex_unlock(&bdev
->mutex
);
747 mutex_unlock(&bdev
->mutex
);
749 if (bdev
->frequency
< region_configs
[region
].bottom_frequency
||
750 bdev
->frequency
> region_configs
[region
].top_frequency
)
751 new_frequency
= region_configs
[region
].bottom_frequency
;
753 if (new_frequency
> 0) {
754 err
= bcm2048_set_fm_frequency(bdev
, new_frequency
);
760 err
= bcm2048_set_fm_deemphasis(bdev
,
761 region_configs
[region
].deemphasis
);
767 static int bcm2048_get_region(struct bcm2048_device
*bdev
)
771 mutex_lock(&bdev
->mutex
);
772 err
= bdev
->region_info
.region
;
773 mutex_unlock(&bdev
->mutex
);
778 static int bcm2048_set_mute(struct bcm2048_device
*bdev
, u16 mute
)
782 mutex_lock(&bdev
->mutex
);
784 bdev
->cache_fm_audio_ctrl0
&= ~(BCM2048_RF_MUTE
| BCM2048_MANUAL_MUTE
);
787 bdev
->cache_fm_audio_ctrl0
|= (BCM2048_RF_MUTE
|
788 BCM2048_MANUAL_MUTE
);
790 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_AUDIO_CTRL0
,
791 bdev
->cache_fm_audio_ctrl0
);
794 bdev
->mute_state
= mute
;
796 mutex_unlock(&bdev
->mutex
);
800 static int bcm2048_get_mute(struct bcm2048_device
*bdev
)
805 mutex_lock(&bdev
->mutex
);
807 if (bdev
->power_state
) {
808 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_AUDIO_CTRL0
,
811 err
= value
& (BCM2048_RF_MUTE
| BCM2048_MANUAL_MUTE
);
813 err
= bdev
->mute_state
;
816 mutex_unlock(&bdev
->mutex
);
820 static int bcm2048_set_audio_route(struct bcm2048_device
*bdev
, u8 route
)
824 mutex_lock(&bdev
->mutex
);
826 route
&= (BCM2048_AUDIO_ROUTE_DAC
| BCM2048_AUDIO_ROUTE_I2S
);
827 bdev
->cache_fm_audio_ctrl0
&= ~(BCM2048_AUDIO_ROUTE_DAC
|
828 BCM2048_AUDIO_ROUTE_I2S
);
829 bdev
->cache_fm_audio_ctrl0
|= route
;
831 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_AUDIO_CTRL0
,
832 bdev
->cache_fm_audio_ctrl0
);
834 mutex_unlock(&bdev
->mutex
);
838 static int bcm2048_get_audio_route(struct bcm2048_device
*bdev
)
843 mutex_lock(&bdev
->mutex
);
845 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_AUDIO_CTRL0
, &value
);
847 mutex_unlock(&bdev
->mutex
);
850 return value
& (BCM2048_AUDIO_ROUTE_DAC
|
851 BCM2048_AUDIO_ROUTE_I2S
);
856 static int bcm2048_set_dac_output(struct bcm2048_device
*bdev
, u8 channels
)
860 mutex_lock(&bdev
->mutex
);
862 bdev
->cache_fm_audio_ctrl0
&= ~(BCM2048_DAC_OUTPUT_LEFT
|
863 BCM2048_DAC_OUTPUT_RIGHT
);
864 bdev
->cache_fm_audio_ctrl0
|= channels
;
866 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_AUDIO_CTRL0
,
867 bdev
->cache_fm_audio_ctrl0
);
869 mutex_unlock(&bdev
->mutex
);
873 static int bcm2048_get_dac_output(struct bcm2048_device
*bdev
)
878 mutex_lock(&bdev
->mutex
);
880 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_AUDIO_CTRL0
, &value
);
882 mutex_unlock(&bdev
->mutex
);
885 return value
& (BCM2048_DAC_OUTPUT_LEFT
|
886 BCM2048_DAC_OUTPUT_RIGHT
);
891 static int bcm2048_set_fm_search_rssi_threshold(struct bcm2048_device
*bdev
,
896 mutex_lock(&bdev
->mutex
);
898 threshold
&= BCM2048_SEARCH_RSSI_THRESHOLD
;
899 bdev
->cache_fm_search_ctrl0
&= ~BCM2048_SEARCH_RSSI_THRESHOLD
;
900 bdev
->cache_fm_search_ctrl0
|= threshold
;
902 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_SEARCH_CTRL0
,
903 bdev
->cache_fm_search_ctrl0
);
905 mutex_unlock(&bdev
->mutex
);
909 static int bcm2048_get_fm_search_rssi_threshold(struct bcm2048_device
*bdev
)
914 mutex_lock(&bdev
->mutex
);
916 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_SEARCH_CTRL0
, &value
);
918 mutex_unlock(&bdev
->mutex
);
921 return value
& BCM2048_SEARCH_RSSI_THRESHOLD
;
926 static int bcm2048_set_fm_search_mode_direction(struct bcm2048_device
*bdev
,
931 mutex_lock(&bdev
->mutex
);
933 bdev
->cache_fm_search_ctrl0
&= ~BCM2048_SEARCH_DIRECTION
;
936 bdev
->cache_fm_search_ctrl0
|= BCM2048_SEARCH_DIRECTION
;
938 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_SEARCH_CTRL0
,
939 bdev
->cache_fm_search_ctrl0
);
941 mutex_unlock(&bdev
->mutex
);
945 static int bcm2048_get_fm_search_mode_direction(struct bcm2048_device
*bdev
)
950 mutex_lock(&bdev
->mutex
);
952 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_SEARCH_CTRL0
, &value
);
954 mutex_unlock(&bdev
->mutex
);
956 if (!err
&& (value
& BCM2048_SEARCH_DIRECTION
))
957 return BCM2048_SEARCH_DIRECTION_UP
;
962 static int bcm2048_set_fm_search_tune_mode(struct bcm2048_device
*bdev
,
965 int err
, timeout
, restart_rds
= 0;
968 value
= mode
& BCM2048_FM_AUTO_SEARCH
;
970 flags
= BCM2048_FM_FLAG_SEARCH_TUNE_FINISHED
|
971 BCM2048_FM_FLAG_SEARCH_TUNE_FAIL
;
973 mutex_lock(&bdev
->mutex
);
976 * If RDS is enabled, and frequency is changed, RDS quits working.
977 * Thus, always restart RDS if it's enabled. Moreover, RDS must
978 * not be enabled while changing the frequency because it can
979 * provide a race to the mutex from the workqueue handler if RDS
980 * IRQ occurs while waiting for frequency changed IRQ.
982 if (bcm2048_get_rds_no_lock(bdev
)) {
983 err
= bcm2048_set_rds_no_lock(bdev
, 0);
989 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_RDS_MASK0
, flags
);
994 bcm2048_send_command(bdev
, BCM2048_I2C_FM_SEARCH_TUNE_MODE
, value
);
996 if (mode
!= BCM2048_FM_AUTO_SEARCH_MODE
)
997 timeout
= BCM2048_DEFAULT_TIMEOUT
;
999 timeout
= BCM2048_AUTO_SEARCH_TIMEOUT
;
1001 if (!wait_for_completion_timeout(&bdev
->compl,
1002 msecs_to_jiffies(timeout
)))
1003 dev_err(&bdev
->client
->dev
, "IRQ timeout.\n");
1006 if (!bdev
->scan_state
)
1011 err
|= bcm2048_set_rds_no_lock(bdev
, 1);
1013 mutex_unlock(&bdev
->mutex
);
1018 static int bcm2048_get_fm_search_tune_mode(struct bcm2048_device
*bdev
)
1023 mutex_lock(&bdev
->mutex
);
1025 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_SEARCH_TUNE_MODE
,
1028 mutex_unlock(&bdev
->mutex
);
1031 return value
& BCM2048_FM_AUTO_SEARCH
;
1036 static int bcm2048_set_rds_b_block_mask(struct bcm2048_device
*bdev
, u16 mask
)
1040 mutex_lock(&bdev
->mutex
);
1042 err
= bcm2048_send_command(bdev
, BCM2048_I2C_RDS_BLKB_MASK0
,
1044 err
|= bcm2048_send_command(bdev
, BCM2048_I2C_RDS_BLKB_MASK1
,
1047 mutex_unlock(&bdev
->mutex
);
1051 static int bcm2048_get_rds_b_block_mask(struct bcm2048_device
*bdev
)
1054 u8 lsb
= 0, msb
= 0;
1056 mutex_lock(&bdev
->mutex
);
1058 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_RDS_BLKB_MASK0
, &lsb
);
1059 err
|= bcm2048_recv_command(bdev
, BCM2048_I2C_RDS_BLKB_MASK1
, &msb
);
1061 mutex_unlock(&bdev
->mutex
);
1064 return compose_u16(msb
, lsb
);
1069 static int bcm2048_set_rds_b_block_match(struct bcm2048_device
*bdev
,
1074 mutex_lock(&bdev
->mutex
);
1076 err
= bcm2048_send_command(bdev
, BCM2048_I2C_RDS_BLKB_MATCH0
,
1078 err
|= bcm2048_send_command(bdev
, BCM2048_I2C_RDS_BLKB_MATCH1
,
1081 mutex_unlock(&bdev
->mutex
);
1085 static int bcm2048_get_rds_b_block_match(struct bcm2048_device
*bdev
)
1088 u8 lsb
= 0, msb
= 0;
1090 mutex_lock(&bdev
->mutex
);
1092 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_RDS_BLKB_MATCH0
, &lsb
);
1093 err
|= bcm2048_recv_command(bdev
, BCM2048_I2C_RDS_BLKB_MATCH1
, &msb
);
1095 mutex_unlock(&bdev
->mutex
);
1098 return compose_u16(msb
, lsb
);
1103 static int bcm2048_set_rds_pi_mask(struct bcm2048_device
*bdev
, u16 mask
)
1107 mutex_lock(&bdev
->mutex
);
1109 err
= bcm2048_send_command(bdev
, BCM2048_I2C_RDS_PI_MASK0
, lsb(mask
));
1110 err
|= bcm2048_send_command(bdev
, BCM2048_I2C_RDS_PI_MASK1
, msb(mask
));
1112 mutex_unlock(&bdev
->mutex
);
1116 static int bcm2048_get_rds_pi_mask(struct bcm2048_device
*bdev
)
1119 u8 lsb
= 0, msb
= 0;
1121 mutex_lock(&bdev
->mutex
);
1123 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_RDS_PI_MASK0
, &lsb
);
1124 err
|= bcm2048_recv_command(bdev
, BCM2048_I2C_RDS_PI_MASK1
, &msb
);
1126 mutex_unlock(&bdev
->mutex
);
1129 return compose_u16(msb
, lsb
);
1134 static int bcm2048_set_rds_pi_match(struct bcm2048_device
*bdev
, u16 match
)
1138 mutex_lock(&bdev
->mutex
);
1140 err
= bcm2048_send_command(bdev
, BCM2048_I2C_RDS_PI_MATCH0
,
1142 err
|= bcm2048_send_command(bdev
, BCM2048_I2C_RDS_PI_MATCH1
,
1145 mutex_unlock(&bdev
->mutex
);
1149 static int bcm2048_get_rds_pi_match(struct bcm2048_device
*bdev
)
1152 u8 lsb
= 0, msb
= 0;
1154 mutex_lock(&bdev
->mutex
);
1156 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_RDS_PI_MATCH0
, &lsb
);
1157 err
|= bcm2048_recv_command(bdev
, BCM2048_I2C_RDS_PI_MATCH1
, &msb
);
1159 mutex_unlock(&bdev
->mutex
);
1162 return compose_u16(msb
, lsb
);
1167 static int bcm2048_set_fm_rds_mask(struct bcm2048_device
*bdev
, u16 mask
)
1171 mutex_lock(&bdev
->mutex
);
1173 err
= bcm2048_send_command(bdev
, BCM2048_I2C_FM_RDS_MASK0
, lsb(mask
));
1174 err
|= bcm2048_send_command(bdev
, BCM2048_I2C_FM_RDS_MASK1
, msb(mask
));
1176 mutex_unlock(&bdev
->mutex
);
1180 static int bcm2048_get_fm_rds_mask(struct bcm2048_device
*bdev
)
1183 u8 value0
= 0, value1
= 0;
1185 mutex_lock(&bdev
->mutex
);
1187 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_RDS_MASK0
, &value0
);
1188 err
|= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_RDS_MASK1
, &value1
);
1190 mutex_unlock(&bdev
->mutex
);
1193 return compose_u16(value1
, value0
);
1198 static int bcm2048_get_fm_rds_flags(struct bcm2048_device
*bdev
)
1201 u8 value0
= 0, value1
= 0;
1203 mutex_lock(&bdev
->mutex
);
1205 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_RDS_FLAG0
, &value0
);
1206 err
|= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_RDS_FLAG1
, &value1
);
1208 mutex_unlock(&bdev
->mutex
);
1211 return compose_u16(value1
, value0
);
1216 static int bcm2048_get_region_bottom_frequency(struct bcm2048_device
*bdev
)
1218 return bdev
->region_info
.bottom_frequency
;
1221 static int bcm2048_get_region_top_frequency(struct bcm2048_device
*bdev
)
1223 return bdev
->region_info
.top_frequency
;
1226 static int bcm2048_set_fm_best_tune_mode(struct bcm2048_device
*bdev
, u8 mode
)
1231 mutex_lock(&bdev
->mutex
);
1233 /* Perform read as the manual indicates */
1234 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_BEST_TUNE_MODE
,
1236 value
&= ~BCM2048_BEST_TUNE_MODE
;
1239 value
|= BCM2048_BEST_TUNE_MODE
;
1240 err
|= bcm2048_send_command(bdev
, BCM2048_I2C_FM_BEST_TUNE_MODE
,
1243 mutex_unlock(&bdev
->mutex
);
1247 static int bcm2048_get_fm_best_tune_mode(struct bcm2048_device
*bdev
)
1252 mutex_lock(&bdev
->mutex
);
1254 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_BEST_TUNE_MODE
,
1257 mutex_unlock(&bdev
->mutex
);
1259 if (!err
&& (value
& BCM2048_BEST_TUNE_MODE
))
1260 return BCM2048_ITEM_ENABLED
;
1265 static int bcm2048_get_fm_carrier_error(struct bcm2048_device
*bdev
)
1270 mutex_lock(&bdev
->mutex
);
1271 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_CARRIER
, &value
);
1272 mutex_unlock(&bdev
->mutex
);
1280 static int bcm2048_get_fm_rssi(struct bcm2048_device
*bdev
)
1285 mutex_lock(&bdev
->mutex
);
1286 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_RSSI
, &value
);
1287 mutex_unlock(&bdev
->mutex
);
1295 static int bcm2048_set_rds_wline(struct bcm2048_device
*bdev
, u8 wline
)
1299 mutex_lock(&bdev
->mutex
);
1301 err
= bcm2048_send_command(bdev
, BCM2048_I2C_RDS_WLINE
, wline
);
1304 bdev
->fifo_size
= wline
;
1306 mutex_unlock(&bdev
->mutex
);
1310 static int bcm2048_get_rds_wline(struct bcm2048_device
*bdev
)
1315 mutex_lock(&bdev
->mutex
);
1317 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_RDS_WLINE
, &value
);
1319 mutex_unlock(&bdev
->mutex
);
1322 bdev
->fifo_size
= value
;
1329 static int bcm2048_checkrev(struct bcm2048_device
*bdev
)
1334 mutex_lock(&bdev
->mutex
);
1336 err
= bcm2048_recv_command(bdev
, BCM2048_I2C_FM_RDS_REV
, &version
);
1338 mutex_unlock(&bdev
->mutex
);
1341 dev_info(&bdev
->client
->dev
, "BCM2048 Version 0x%x\n",
1349 static int bcm2048_get_rds_rt(struct bcm2048_device
*bdev
, char *data
)
1351 int err
= 0, i
, j
= 0, ce
= 0, cr
= 0;
1352 char data_buffer
[BCM2048_MAX_RDS_RT
+ 1];
1354 mutex_lock(&bdev
->mutex
);
1356 if (!bdev
->rds_info
.text_len
) {
1361 for (i
= 0; i
< BCM2048_MAX_RDS_RT
; i
++) {
1362 if (bdev
->rds_info
.rds_rt
[i
]) {
1364 /* Skip the carriage return */
1365 if (bdev
->rds_info
.rds_rt
[i
] != 0x0d) {
1366 data_buffer
[j
++] = bdev
->rds_info
.rds_rt
[i
];
1374 if (j
<= BCM2048_MAX_RDS_RT
)
1377 for (i
= 0; i
< BCM2048_MAX_RDS_RT
; i
++) {
1378 if (!bdev
->rds_info
.rds_rt
[i
]) {
1379 if (cr
&& (i
< cr
)) {
1384 if (cr
&& (i
>= cr
))
1392 memcpy(data
, data_buffer
, sizeof(data_buffer
));
1395 mutex_unlock(&bdev
->mutex
);
1399 static int bcm2048_get_rds_ps(struct bcm2048_device
*bdev
, char *data
)
1401 int err
= 0, i
, j
= 0;
1402 char data_buffer
[BCM2048_MAX_RDS_PS
+ 1];
1404 mutex_lock(&bdev
->mutex
);
1406 if (!bdev
->rds_info
.text_len
) {
1411 for (i
= 0; i
< BCM2048_MAX_RDS_PS
; i
++) {
1412 if (bdev
->rds_info
.rds_ps
[i
]) {
1413 data_buffer
[j
++] = bdev
->rds_info
.rds_ps
[i
];
1415 if (i
< (BCM2048_MAX_RDS_PS
- 1)) {
1422 if (j
<= BCM2048_MAX_RDS_PS
)
1425 memcpy(data
, data_buffer
, sizeof(data_buffer
));
1428 mutex_unlock(&bdev
->mutex
);
1432 static void bcm2048_parse_rds_pi(struct bcm2048_device
*bdev
)
1437 for (i
= 0; i
< bdev
->fifo_size
; i
+= BCM2048_RDS_FIFO_DUPLE_SIZE
) {
1438 /* Block A match, only data without crc errors taken */
1439 if (bdev
->rds_info
.radio_text
[i
] == BCM2048_RDS_BLOCK_A
) {
1440 pi
= (bdev
->rds_info
.radio_text
[i
+ 1] << 8) +
1441 bdev
->rds_info
.radio_text
[i
+ 2];
1443 if (!bdev
->rds_info
.rds_pi
) {
1444 bdev
->rds_info
.rds_pi
= pi
;
1447 if (pi
!= bdev
->rds_info
.rds_pi
) {
1450 bdev
->rds_info
.rds_pi
= pi
;
1460 static int bcm2048_rds_block_crc(struct bcm2048_device
*bdev
, int i
)
1462 return bdev
->rds_info
.radio_text
[i
] & BCM2048_RDS_CRC_MASK
;
1465 static void bcm2048_parse_rds_rt_block(struct bcm2048_device
*bdev
, int i
,
1468 /* Good data will overwrite poor data */
1470 if (!bdev
->rds_info
.rds_rt
[index
])
1471 bdev
->rds_info
.rds_rt
[index
] =
1472 bdev
->rds_info
.radio_text
[i
+ 1];
1473 if (!bdev
->rds_info
.rds_rt
[index
+ 1])
1474 bdev
->rds_info
.rds_rt
[index
+ 1] =
1475 bdev
->rds_info
.radio_text
[i
+ 2];
1477 bdev
->rds_info
.rds_rt
[index
] =
1478 bdev
->rds_info
.radio_text
[i
+ 1];
1479 bdev
->rds_info
.rds_rt
[index
+ 1] =
1480 bdev
->rds_info
.radio_text
[i
+ 2];
1484 static int bcm2048_parse_rt_match_b(struct bcm2048_device
*bdev
, int i
)
1486 int crc
, rt_id
, rt_group_b
, rt_ab
, index
= 0;
1488 crc
= bcm2048_rds_block_crc(bdev
, i
);
1490 if (crc
== BCM2048_RDS_CRC_UNRECOVARABLE
)
1493 if ((bdev
->rds_info
.radio_text
[i
] & BCM2048_RDS_BLOCK_MASK
) ==
1494 BCM2048_RDS_BLOCK_B
) {
1495 rt_id
= bdev
->rds_info
.radio_text
[i
+ 1] &
1496 BCM2048_RDS_BLOCK_MASK
;
1497 rt_group_b
= bdev
->rds_info
.radio_text
[i
+ 1] &
1498 BCM2048_RDS_GROUP_AB_MASK
;
1499 rt_ab
= bdev
->rds_info
.radio_text
[i
+ 2] &
1500 BCM2048_RDS_RT_AB_MASK
;
1502 if (rt_group_b
!= bdev
->rds_info
.rds_rt_group_b
) {
1503 memset(bdev
->rds_info
.rds_rt
, 0,
1504 sizeof(bdev
->rds_info
.rds_rt
));
1505 bdev
->rds_info
.rds_rt_group_b
= rt_group_b
;
1508 if (rt_id
== BCM2048_RDS_RT
) {
1509 /* A to B or (vice versa), means: clear screen */
1510 if (rt_ab
!= bdev
->rds_info
.rds_rt_ab
) {
1511 memset(bdev
->rds_info
.rds_rt
, 0,
1512 sizeof(bdev
->rds_info
.rds_rt
));
1513 bdev
->rds_info
.rds_rt_ab
= rt_ab
;
1516 index
= bdev
->rds_info
.radio_text
[i
+ 2] &
1517 BCM2048_RDS_RT_INDEX
;
1519 if (bdev
->rds_info
.rds_rt_group_b
)
1531 static int bcm2048_parse_rt_match_c(struct bcm2048_device
*bdev
, int i
,
1536 crc
= bcm2048_rds_block_crc(bdev
, i
);
1538 if (crc
== BCM2048_RDS_CRC_UNRECOVARABLE
)
1541 BUG_ON((index
+2) >= BCM2048_MAX_RDS_RT
);
1543 if ((bdev
->rds_info
.radio_text
[i
] & BCM2048_RDS_BLOCK_MASK
) ==
1544 BCM2048_RDS_BLOCK_C
) {
1545 if (bdev
->rds_info
.rds_rt_group_b
)
1547 bcm2048_parse_rds_rt_block(bdev
, i
, index
, crc
);
1554 static void bcm2048_parse_rt_match_d(struct bcm2048_device
*bdev
, int i
,
1559 crc
= bcm2048_rds_block_crc(bdev
, i
);
1561 if (crc
== BCM2048_RDS_CRC_UNRECOVARABLE
)
1564 BUG_ON((index
+4) >= BCM2048_MAX_RDS_RT
);
1566 if ((bdev
->rds_info
.radio_text
[i
] & BCM2048_RDS_BLOCK_MASK
) ==
1567 BCM2048_RDS_BLOCK_D
)
1568 bcm2048_parse_rds_rt_block(bdev
, i
, index
+ 2, crc
);
1571 static void bcm2048_parse_rds_rt(struct bcm2048_device
*bdev
)
1573 int i
, index
= 0, crc
, match_b
= 0, match_c
= 0, match_d
= 0;
1575 for (i
= 0; i
< bdev
->fifo_size
; i
+= BCM2048_RDS_FIFO_DUPLE_SIZE
) {
1578 index
= bcm2048_parse_rt_match_b(bdev
, i
);
1579 if (index
>= 0 && index
<= (BCM2048_MAX_RDS_RT
- 5))
1582 } else if (match_c
) {
1584 if (bcm2048_parse_rt_match_c(bdev
, i
, index
))
1587 } else if (match_d
) {
1589 bcm2048_parse_rt_match_d(bdev
, i
, index
);
1593 /* Skip erroneous blocks due to messed up A block altogether */
1594 if ((bdev
->rds_info
.radio_text
[i
] & BCM2048_RDS_BLOCK_MASK
) ==
1595 BCM2048_RDS_BLOCK_A
) {
1596 crc
= bcm2048_rds_block_crc(bdev
, i
);
1597 if (crc
== BCM2048_RDS_CRC_UNRECOVARABLE
)
1599 /* Synchronize to a good RDS PI */
1600 if (((bdev
->rds_info
.radio_text
[i
+ 1] << 8) +
1601 bdev
->rds_info
.radio_text
[i
+ 2]) ==
1602 bdev
->rds_info
.rds_pi
)
1608 static void bcm2048_parse_rds_ps_block(struct bcm2048_device
*bdev
, int i
,
1611 /* Good data will overwrite poor data */
1613 if (!bdev
->rds_info
.rds_ps
[index
])
1614 bdev
->rds_info
.rds_ps
[index
] =
1615 bdev
->rds_info
.radio_text
[i
+ 1];
1616 if (!bdev
->rds_info
.rds_ps
[index
+ 1])
1617 bdev
->rds_info
.rds_ps
[index
+ 1] =
1618 bdev
->rds_info
.radio_text
[i
+ 2];
1620 bdev
->rds_info
.rds_ps
[index
] =
1621 bdev
->rds_info
.radio_text
[i
+ 1];
1622 bdev
->rds_info
.rds_ps
[index
+ 1] =
1623 bdev
->rds_info
.radio_text
[i
+ 2];
1627 static int bcm2048_parse_ps_match_c(struct bcm2048_device
*bdev
, int i
,
1632 crc
= bcm2048_rds_block_crc(bdev
, i
);
1634 if (crc
== BCM2048_RDS_CRC_UNRECOVARABLE
)
1637 if ((bdev
->rds_info
.radio_text
[i
] & BCM2048_RDS_BLOCK_MASK
) ==
1638 BCM2048_RDS_BLOCK_C
)
1644 static void bcm2048_parse_ps_match_d(struct bcm2048_device
*bdev
, int i
,
1649 crc
= bcm2048_rds_block_crc(bdev
, i
);
1651 if (crc
== BCM2048_RDS_CRC_UNRECOVARABLE
)
1654 if ((bdev
->rds_info
.radio_text
[i
] & BCM2048_RDS_BLOCK_MASK
) ==
1655 BCM2048_RDS_BLOCK_D
)
1656 bcm2048_parse_rds_ps_block(bdev
, i
, index
, crc
);
1659 static int bcm2048_parse_ps_match_b(struct bcm2048_device
*bdev
, int i
)
1661 int crc
, index
, ps_id
, ps_group
;
1663 crc
= bcm2048_rds_block_crc(bdev
, i
);
1665 if (crc
== BCM2048_RDS_CRC_UNRECOVARABLE
)
1668 /* Block B Radio PS match */
1669 if ((bdev
->rds_info
.radio_text
[i
] & BCM2048_RDS_BLOCK_MASK
) ==
1670 BCM2048_RDS_BLOCK_B
) {
1671 ps_id
= bdev
->rds_info
.radio_text
[i
+ 1] &
1672 BCM2048_RDS_BLOCK_MASK
;
1673 ps_group
= bdev
->rds_info
.radio_text
[i
+ 1] &
1674 BCM2048_RDS_GROUP_AB_MASK
;
1677 * Poor RSSI will lead to RDS data corruption
1678 * So using 3 (same) sequential values to justify major changes
1680 if (ps_group
!= bdev
->rds_info
.rds_ps_group
) {
1681 if (crc
== BCM2048_RDS_CRC_NONE
) {
1682 bdev
->rds_info
.rds_ps_group_cnt
++;
1683 if (bdev
->rds_info
.rds_ps_group_cnt
> 2) {
1684 bdev
->rds_info
.rds_ps_group
= ps_group
;
1685 bdev
->rds_info
.rds_ps_group_cnt
= 0;
1686 dev_err(&bdev
->client
->dev
,
1687 "RDS PS Group change!\n");
1692 bdev
->rds_info
.rds_ps_group_cnt
= 0;
1696 if (ps_id
== BCM2048_RDS_PS
) {
1697 index
= bdev
->rds_info
.radio_text
[i
+ 2] &
1698 BCM2048_RDS_PS_INDEX
;
1707 static void bcm2048_parse_rds_ps(struct bcm2048_device
*bdev
)
1709 int i
, index
= 0, crc
, match_b
= 0, match_c
= 0, match_d
= 0;
1711 for (i
= 0; i
< bdev
->fifo_size
; i
+= BCM2048_RDS_FIFO_DUPLE_SIZE
) {
1714 index
= bcm2048_parse_ps_match_b(bdev
, i
);
1715 if (index
>= 0 && index
< (BCM2048_MAX_RDS_PS
- 1))
1718 } else if (match_c
) {
1720 if (bcm2048_parse_ps_match_c(bdev
, i
, index
))
1723 } else if (match_d
) {
1725 bcm2048_parse_ps_match_d(bdev
, i
, index
);
1729 /* Skip erroneous blocks due to messed up A block altogether */
1730 if ((bdev
->rds_info
.radio_text
[i
] & BCM2048_RDS_BLOCK_MASK
) ==
1731 BCM2048_RDS_BLOCK_A
) {
1732 crc
= bcm2048_rds_block_crc(bdev
, i
);
1733 if (crc
== BCM2048_RDS_CRC_UNRECOVARABLE
)
1735 /* Synchronize to a good RDS PI */
1736 if (((bdev
->rds_info
.radio_text
[i
+ 1] << 8) +
1737 bdev
->rds_info
.radio_text
[i
+ 2]) ==
1738 bdev
->rds_info
.rds_pi
)
1744 static void bcm2048_rds_fifo_receive(struct bcm2048_device
*bdev
)
1748 mutex_lock(&bdev
->mutex
);
1750 err
= bcm2048_recv_duples(bdev
, BCM2048_I2C_RDS_DATA
,
1751 bdev
->rds_info
.radio_text
, bdev
->fifo_size
);
1753 dev_err(&bdev
->client
->dev
, "RDS Read problem\n");
1754 mutex_unlock(&bdev
->mutex
);
1758 bdev
->rds_info
.text_len
= bdev
->fifo_size
;
1760 bcm2048_parse_rds_pi(bdev
);
1761 bcm2048_parse_rds_rt(bdev
);
1762 bcm2048_parse_rds_ps(bdev
);
1764 mutex_unlock(&bdev
->mutex
);
1766 wake_up_interruptible(&bdev
->read_queue
);
1769 static int bcm2048_get_rds_data(struct bcm2048_device
*bdev
, char *data
)
1771 int err
= 0, i
, p
= 0;
1774 mutex_lock(&bdev
->mutex
);
1776 if (!bdev
->rds_info
.text_len
) {
1781 data_buffer
= kcalloc(BCM2048_MAX_RDS_RADIO_TEXT
, 5, GFP_KERNEL
);
1787 for (i
= 0; i
< bdev
->rds_info
.text_len
; i
++) {
1788 p
+= sprintf(data_buffer
+ p
, "%x ",
1789 bdev
->rds_info
.radio_text
[i
]);
1792 memcpy(data
, data_buffer
, p
);
1796 mutex_unlock(&bdev
->mutex
);
1801 * BCM2048 default initialization sequence
1803 static int bcm2048_init(struct bcm2048_device
*bdev
)
1807 err
= bcm2048_set_power_state(bdev
, BCM2048_POWER_ON
);
1811 err
= bcm2048_set_audio_route(bdev
, BCM2048_AUDIO_ROUTE_DAC
);
1815 err
= bcm2048_set_dac_output(bdev
, BCM2048_DAC_OUTPUT_LEFT
|
1816 BCM2048_DAC_OUTPUT_RIGHT
);
1823 * BCM2048 default deinitialization sequence
1825 static int bcm2048_deinit(struct bcm2048_device
*bdev
)
1829 err
= bcm2048_set_audio_route(bdev
, 0);
1833 err
= bcm2048_set_dac_output(bdev
, 0);
1837 err
= bcm2048_set_power_state(bdev
, BCM2048_POWER_OFF
);
1843 * BCM2048 probe sequence
1845 static int bcm2048_probe(struct bcm2048_device
*bdev
)
1849 err
= bcm2048_set_power_state(bdev
, BCM2048_POWER_ON
);
1853 err
= bcm2048_checkrev(bdev
);
1857 err
= bcm2048_set_mute(bdev
, BCM2048_DEFAULT_MUTE
);
1861 err
= bcm2048_set_region(bdev
, BCM2048_DEFAULT_REGION
);
1865 err
= bcm2048_set_fm_search_rssi_threshold(bdev
,
1866 BCM2048_DEFAULT_RSSI_THRESHOLD
);
1870 err
= bcm2048_set_fm_automatic_stereo_mono(bdev
, BCM2048_ITEM_ENABLED
);
1874 err
= bcm2048_get_rds_wline(bdev
);
1875 if (err
< BCM2048_DEFAULT_RDS_WLINE
)
1876 err
= bcm2048_set_rds_wline(bdev
, BCM2048_DEFAULT_RDS_WLINE
);
1880 err
= bcm2048_set_power_state(bdev
, BCM2048_POWER_OFF
);
1882 init_waitqueue_head(&bdev
->read_queue
);
1883 bdev
->rds_data_available
= 0;
1892 * BCM2048 workqueue handler
1894 static void bcm2048_work(struct work_struct
*work
)
1896 struct bcm2048_device
*bdev
;
1897 u8 flag_lsb
= 0, flag_msb
= 0, flags
;
1899 bdev
= container_of(work
, struct bcm2048_device
, work
);
1900 bcm2048_recv_command(bdev
, BCM2048_I2C_FM_RDS_FLAG0
, &flag_lsb
);
1901 bcm2048_recv_command(bdev
, BCM2048_I2C_FM_RDS_FLAG1
, &flag_msb
);
1903 if (flag_lsb
& (BCM2048_FM_FLAG_SEARCH_TUNE_FINISHED
|
1904 BCM2048_FM_FLAG_SEARCH_TUNE_FAIL
)) {
1905 if (flag_lsb
& BCM2048_FM_FLAG_SEARCH_TUNE_FAIL
)
1906 bdev
->scan_state
= BCM2048_SCAN_FAIL
;
1908 bdev
->scan_state
= BCM2048_SCAN_OK
;
1910 complete(&bdev
->compl);
1913 if (flag_msb
& BCM2048_RDS_FLAG_FIFO_WLINE
) {
1914 bcm2048_rds_fifo_receive(bdev
);
1915 if (bdev
->rds_state
) {
1916 flags
= BCM2048_RDS_FLAG_FIFO_WLINE
;
1917 bcm2048_send_command(bdev
, BCM2048_I2C_FM_RDS_MASK1
,
1920 bdev
->rds_data_available
= 1;
1921 bdev
->rd_index
= 0; /* new data, new start */
1926 * BCM2048 interrupt handler
1928 static irqreturn_t
bcm2048_handler(int irq
, void *dev
)
1930 struct bcm2048_device
*bdev
= dev
;
1932 dev_dbg(&bdev
->client
->dev
, "IRQ called, queuing work\n");
1933 if (bdev
->power_state
)
1934 schedule_work(&bdev
->work
);
1940 * BCM2048 sysfs interface definitions
1942 #define property_write(prop, type, mask, check) \
1943 static ssize_t bcm2048_##prop##_write(struct device *dev, \
1944 struct device_attribute *attr, \
1948 struct bcm2048_device *bdev = dev_get_drvdata(dev); \
1955 if (sscanf(buf, mask, &value) != 1) \
1961 err = bcm2048_set_##prop(bdev, value); \
1963 return err < 0 ? err : count; \
1966 #define property_read(prop, size, mask) \
1967 static ssize_t bcm2048_##prop##_read(struct device *dev, \
1968 struct device_attribute *attr, \
1971 struct bcm2048_device *bdev = dev_get_drvdata(dev); \
1977 value = bcm2048_get_##prop(bdev); \
1980 value = sprintf(buf, mask "\n", value); \
1985 #define property_signed_read(prop, size, mask) \
1986 static ssize_t bcm2048_##prop##_read(struct device *dev, \
1987 struct device_attribute *attr, \
1990 struct bcm2048_device *bdev = dev_get_drvdata(dev); \
1996 value = bcm2048_get_##prop(bdev); \
1998 value = sprintf(buf, mask "\n", value); \
2003 #define DEFINE_SYSFS_PROPERTY(prop, signal, size, mask, check) \
2004 property_write(prop, signal size, mask, check) \
2005 property_read(prop, size, mask)
2007 #define property_str_read(prop, size) \
2008 static ssize_t bcm2048_##prop##_read(struct device *dev, \
2009 struct device_attribute *attr, \
2012 struct bcm2048_device *bdev = dev_get_drvdata(dev); \
2019 out = kzalloc(size + 1, GFP_KERNEL); \
2023 bcm2048_get_##prop(bdev, out); \
2024 count = sprintf(buf, "%s\n", out); \
2031 DEFINE_SYSFS_PROPERTY(power_state
, unsigned, int, "%u", 0)
2032 DEFINE_SYSFS_PROPERTY(mute
, unsigned, int, "%u", 0)
2033 DEFINE_SYSFS_PROPERTY(audio_route
, unsigned, int, "%u", 0)
2034 DEFINE_SYSFS_PROPERTY(dac_output
, unsigned, int, "%u", 0)
2036 DEFINE_SYSFS_PROPERTY(fm_hi_lo_injection
, unsigned, int, "%u", 0)
2037 DEFINE_SYSFS_PROPERTY(fm_frequency
, unsigned, int, "%u", 0)
2038 DEFINE_SYSFS_PROPERTY(fm_af_frequency
, unsigned, int, "%u", 0)
2039 DEFINE_SYSFS_PROPERTY(fm_deemphasis
, unsigned, int, "%u", 0)
2040 DEFINE_SYSFS_PROPERTY(fm_rds_mask
, unsigned, int, "%u", 0)
2041 DEFINE_SYSFS_PROPERTY(fm_best_tune_mode
, unsigned, int, "%u", 0)
2042 DEFINE_SYSFS_PROPERTY(fm_search_rssi_threshold
, unsigned, int, "%u", 0)
2043 DEFINE_SYSFS_PROPERTY(fm_search_mode_direction
, unsigned, int, "%u", 0)
2044 DEFINE_SYSFS_PROPERTY(fm_search_tune_mode
, unsigned, int, "%u", value
> 3)
2046 DEFINE_SYSFS_PROPERTY(rds
, unsigned, int, "%u", 0)
2047 DEFINE_SYSFS_PROPERTY(rds_b_block_mask
, unsigned, int, "%u", 0)
2048 DEFINE_SYSFS_PROPERTY(rds_b_block_match
, unsigned, int, "%u", 0)
2049 DEFINE_SYSFS_PROPERTY(rds_pi_mask
, unsigned, int, "%u", 0)
2050 DEFINE_SYSFS_PROPERTY(rds_pi_match
, unsigned, int, "%u", 0)
2051 DEFINE_SYSFS_PROPERTY(rds_wline
, unsigned, int, "%u", 0)
2052 property_read(rds_pi
, unsigned int, "%x")
2053 property_str_read(rds_rt
, (BCM2048_MAX_RDS_RT
+ 1))
2054 property_str_read(rds_ps
, (BCM2048_MAX_RDS_PS
+ 1))
2056 property_read(fm_rds_flags
, unsigned int, "%u")
2057 property_str_read(rds_data
, BCM2048_MAX_RDS_RADIO_TEXT
* 5)
2059 property_read(region_bottom_frequency
, unsigned int, "%u")
2060 property_read(region_top_frequency
, unsigned int, "%u")
2061 property_signed_read(fm_carrier_error
, int, "%d")
2062 property_signed_read(fm_rssi
, int, "%d")
2063 DEFINE_SYSFS_PROPERTY(region
, unsigned, int, "%u", 0)
2065 static struct device_attribute attrs
[] = {
2066 __ATTR(power_state
, S_IRUGO
| S_IWUSR
, bcm2048_power_state_read
,
2067 bcm2048_power_state_write
),
2068 __ATTR(mute
, S_IRUGO
| S_IWUSR
, bcm2048_mute_read
,
2069 bcm2048_mute_write
),
2070 __ATTR(audio_route
, S_IRUGO
| S_IWUSR
, bcm2048_audio_route_read
,
2071 bcm2048_audio_route_write
),
2072 __ATTR(dac_output
, S_IRUGO
| S_IWUSR
, bcm2048_dac_output_read
,
2073 bcm2048_dac_output_write
),
2074 __ATTR(fm_hi_lo_injection
, S_IRUGO
| S_IWUSR
,
2075 bcm2048_fm_hi_lo_injection_read
,
2076 bcm2048_fm_hi_lo_injection_write
),
2077 __ATTR(fm_frequency
, S_IRUGO
| S_IWUSR
, bcm2048_fm_frequency_read
,
2078 bcm2048_fm_frequency_write
),
2079 __ATTR(fm_af_frequency
, S_IRUGO
| S_IWUSR
,
2080 bcm2048_fm_af_frequency_read
,
2081 bcm2048_fm_af_frequency_write
),
2082 __ATTR(fm_deemphasis
, S_IRUGO
| S_IWUSR
, bcm2048_fm_deemphasis_read
,
2083 bcm2048_fm_deemphasis_write
),
2084 __ATTR(fm_rds_mask
, S_IRUGO
| S_IWUSR
, bcm2048_fm_rds_mask_read
,
2085 bcm2048_fm_rds_mask_write
),
2086 __ATTR(fm_best_tune_mode
, S_IRUGO
| S_IWUSR
,
2087 bcm2048_fm_best_tune_mode_read
,
2088 bcm2048_fm_best_tune_mode_write
),
2089 __ATTR(fm_search_rssi_threshold
, S_IRUGO
| S_IWUSR
,
2090 bcm2048_fm_search_rssi_threshold_read
,
2091 bcm2048_fm_search_rssi_threshold_write
),
2092 __ATTR(fm_search_mode_direction
, S_IRUGO
| S_IWUSR
,
2093 bcm2048_fm_search_mode_direction_read
,
2094 bcm2048_fm_search_mode_direction_write
),
2095 __ATTR(fm_search_tune_mode
, S_IRUGO
| S_IWUSR
,
2096 bcm2048_fm_search_tune_mode_read
,
2097 bcm2048_fm_search_tune_mode_write
),
2098 __ATTR(rds
, S_IRUGO
| S_IWUSR
, bcm2048_rds_read
,
2100 __ATTR(rds_b_block_mask
, S_IRUGO
| S_IWUSR
,
2101 bcm2048_rds_b_block_mask_read
,
2102 bcm2048_rds_b_block_mask_write
),
2103 __ATTR(rds_b_block_match
, S_IRUGO
| S_IWUSR
,
2104 bcm2048_rds_b_block_match_read
,
2105 bcm2048_rds_b_block_match_write
),
2106 __ATTR(rds_pi_mask
, S_IRUGO
| S_IWUSR
, bcm2048_rds_pi_mask_read
,
2107 bcm2048_rds_pi_mask_write
),
2108 __ATTR(rds_pi_match
, S_IRUGO
| S_IWUSR
, bcm2048_rds_pi_match_read
,
2109 bcm2048_rds_pi_match_write
),
2110 __ATTR(rds_wline
, S_IRUGO
| S_IWUSR
, bcm2048_rds_wline_read
,
2111 bcm2048_rds_wline_write
),
2112 __ATTR(rds_pi
, S_IRUGO
, bcm2048_rds_pi_read
, NULL
),
2113 __ATTR(rds_rt
, S_IRUGO
, bcm2048_rds_rt_read
, NULL
),
2114 __ATTR(rds_ps
, S_IRUGO
, bcm2048_rds_ps_read
, NULL
),
2115 __ATTR(fm_rds_flags
, S_IRUGO
, bcm2048_fm_rds_flags_read
, NULL
),
2116 __ATTR(region_bottom_frequency
, S_IRUGO
,
2117 bcm2048_region_bottom_frequency_read
, NULL
),
2118 __ATTR(region_top_frequency
, S_IRUGO
,
2119 bcm2048_region_top_frequency_read
, NULL
),
2120 __ATTR(fm_carrier_error
, S_IRUGO
,
2121 bcm2048_fm_carrier_error_read
, NULL
),
2122 __ATTR(fm_rssi
, S_IRUGO
,
2123 bcm2048_fm_rssi_read
, NULL
),
2124 __ATTR(region
, S_IRUGO
| S_IWUSR
, bcm2048_region_read
,
2125 bcm2048_region_write
),
2126 __ATTR(rds_data
, S_IRUGO
, bcm2048_rds_data_read
, NULL
),
2129 static int bcm2048_sysfs_unregister_properties(struct bcm2048_device
*bdev
,
2134 for (i
= 0; i
< size
; i
++)
2135 device_remove_file(&bdev
->client
->dev
, &attrs
[i
]);
2140 static int bcm2048_sysfs_register_properties(struct bcm2048_device
*bdev
)
2145 for (i
= 0; i
< ARRAY_SIZE(attrs
); i
++) {
2146 if (device_create_file(&bdev
->client
->dev
, &attrs
[i
]) != 0) {
2147 dev_err(&bdev
->client
->dev
,
2148 "could not register sysfs entry\n");
2150 bcm2048_sysfs_unregister_properties(bdev
, i
);
2158 static int bcm2048_fops_open(struct file
*file
)
2160 struct bcm2048_device
*bdev
= video_drvdata(file
);
2164 bdev
->rds_data_available
= 0;
2169 static int bcm2048_fops_release(struct file
*file
)
2171 struct bcm2048_device
*bdev
= video_drvdata(file
);
2178 static unsigned int bcm2048_fops_poll(struct file
*file
,
2179 struct poll_table_struct
*pts
)
2181 struct bcm2048_device
*bdev
= video_drvdata(file
);
2184 poll_wait(file
, &bdev
->read_queue
, pts
);
2186 if (bdev
->rds_data_available
)
2187 retval
= POLLIN
| POLLRDNORM
;
2192 static ssize_t
bcm2048_fops_read(struct file
*file
, char __user
*buf
,
2193 size_t count
, loff_t
*ppos
)
2195 struct bcm2048_device
*bdev
= video_drvdata(file
);
2199 /* we return at least 3 bytes, one block */
2200 count
= (count
/ 3) * 3; /* only multiples of 3 */
2204 while (!bdev
->rds_data_available
) {
2205 if (file
->f_flags
& O_NONBLOCK
) {
2206 retval
= -EWOULDBLOCK
;
2209 /* interruptible_sleep_on(&bdev->read_queue); */
2210 if (wait_event_interruptible(bdev
->read_queue
,
2211 bdev
->rds_data_available
) < 0) {
2217 mutex_lock(&bdev
->mutex
);
2218 /* copy data to userspace */
2219 i
= bdev
->fifo_size
- bdev
->rd_index
;
2221 count
= (i
/ 3) * 3;
2225 unsigned char tmpbuf
[3];
2227 tmpbuf
[i
] = bdev
->rds_info
.radio_text
[bdev
->rd_index
+ i
+ 2];
2229 bdev
->rds_info
.radio_text
[bdev
->rd_index
+ i
+ 1];
2231 (bdev
->rds_info
.radio_text
[bdev
->rd_index
+ i
] &
2233 if ((bdev
->rds_info
.radio_text
[bdev
->rd_index
+ i
] &
2234 BCM2048_RDS_CRC_MASK
) == BCM2048_RDS_CRC_UNRECOVARABLE
)
2235 tmpbuf
[i
+ 2] |= 0x80;
2236 if (copy_to_user(buf
+ i
, tmpbuf
, 3)) {
2243 bdev
->rd_index
+= i
;
2244 if (bdev
->rd_index
>= bdev
->fifo_size
)
2245 bdev
->rds_data_available
= 0;
2247 mutex_unlock(&bdev
->mutex
);
2256 * bcm2048_fops - file operations interface
2258 static const struct v4l2_file_operations bcm2048_fops
= {
2259 .owner
= THIS_MODULE
,
2260 .unlocked_ioctl
= video_ioctl2
,
2261 /* for RDS read support */
2262 .open
= bcm2048_fops_open
,
2263 .release
= bcm2048_fops_release
,
2264 .read
= bcm2048_fops_read
,
2265 .poll
= bcm2048_fops_poll
2269 * Video4Linux Interface
2271 static struct v4l2_queryctrl bcm2048_v4l2_queryctrl
[] = {
2273 .id
= V4L2_CID_AUDIO_VOLUME
,
2274 .flags
= V4L2_CTRL_FLAG_DISABLED
,
2277 .id
= V4L2_CID_AUDIO_BALANCE
,
2278 .flags
= V4L2_CTRL_FLAG_DISABLED
,
2281 .id
= V4L2_CID_AUDIO_BASS
,
2282 .flags
= V4L2_CTRL_FLAG_DISABLED
,
2285 .id
= V4L2_CID_AUDIO_TREBLE
,
2286 .flags
= V4L2_CTRL_FLAG_DISABLED
,
2289 .id
= V4L2_CID_AUDIO_MUTE
,
2290 .type
= V4L2_CTRL_TYPE_BOOLEAN
,
2298 .id
= V4L2_CID_AUDIO_LOUDNESS
,
2299 .flags
= V4L2_CTRL_FLAG_DISABLED
,
2303 static int bcm2048_vidioc_querycap(struct file
*file
, void *priv
,
2304 struct v4l2_capability
*capability
)
2306 struct bcm2048_device
*bdev
= video_get_drvdata(video_devdata(file
));
2308 strlcpy(capability
->driver
, BCM2048_DRIVER_NAME
,
2309 sizeof(capability
->driver
));
2310 strlcpy(capability
->card
, BCM2048_DRIVER_CARD
,
2311 sizeof(capability
->card
));
2312 snprintf(capability
->bus_info
, 32, "I2C: 0x%X", bdev
->client
->addr
);
2313 capability
->device_caps
= V4L2_CAP_TUNER
| V4L2_CAP_RADIO
|
2314 V4L2_CAP_HW_FREQ_SEEK
;
2315 capability
->capabilities
= capability
->device_caps
|
2316 V4L2_CAP_DEVICE_CAPS
;
2321 static int bcm2048_vidioc_g_input(struct file
*filp
, void *priv
,
2329 static int bcm2048_vidioc_s_input(struct file
*filp
, void *priv
,
2338 static int bcm2048_vidioc_queryctrl(struct file
*file
, void *priv
,
2339 struct v4l2_queryctrl
*qc
)
2343 for (i
= 0; i
< ARRAY_SIZE(bcm2048_v4l2_queryctrl
); i
++) {
2344 if (qc
->id
&& qc
->id
== bcm2048_v4l2_queryctrl
[i
].id
) {
2345 *qc
= bcm2048_v4l2_queryctrl
[i
];
2353 static int bcm2048_vidioc_g_ctrl(struct file
*file
, void *priv
,
2354 struct v4l2_control
*ctrl
)
2356 struct bcm2048_device
*bdev
= video_get_drvdata(video_devdata(file
));
2363 case V4L2_CID_AUDIO_MUTE
:
2364 err
= bcm2048_get_mute(bdev
);
2373 static int bcm2048_vidioc_s_ctrl(struct file
*file
, void *priv
,
2374 struct v4l2_control
*ctrl
)
2376 struct bcm2048_device
*bdev
= video_get_drvdata(video_devdata(file
));
2383 case V4L2_CID_AUDIO_MUTE
:
2385 if (bdev
->power_state
) {
2386 err
= bcm2048_set_mute(bdev
, ctrl
->value
);
2387 err
|= bcm2048_deinit(bdev
);
2390 if (!bdev
->power_state
) {
2391 err
= bcm2048_init(bdev
);
2392 err
|= bcm2048_set_mute(bdev
, ctrl
->value
);
2401 static int bcm2048_vidioc_g_audio(struct file
*file
, void *priv
,
2402 struct v4l2_audio
*audio
)
2404 if (audio
->index
> 1)
2407 strncpy(audio
->name
, "Radio", 32);
2408 audio
->capability
= V4L2_AUDCAP_STEREO
;
2413 static int bcm2048_vidioc_s_audio(struct file
*file
, void *priv
,
2414 const struct v4l2_audio
*audio
)
2416 if (audio
->index
!= 0)
2422 static int bcm2048_vidioc_g_tuner(struct file
*file
, void *priv
,
2423 struct v4l2_tuner
*tuner
)
2425 struct bcm2048_device
*bdev
= video_get_drvdata(video_devdata(file
));
2432 if (tuner
->index
> 0)
2435 strncpy(tuner
->name
, "FM Receiver", 32);
2436 tuner
->type
= V4L2_TUNER_RADIO
;
2438 dev_to_v4l2(bcm2048_get_region_bottom_frequency(bdev
));
2440 dev_to_v4l2(bcm2048_get_region_top_frequency(bdev
));
2441 tuner
->rxsubchans
= V4L2_TUNER_SUB_STEREO
;
2442 tuner
->capability
= V4L2_TUNER_CAP_STEREO
| V4L2_TUNER_CAP_LOW
;
2443 tuner
->audmode
= V4L2_TUNER_MODE_STEREO
;
2445 if (bdev
->power_state
) {
2447 * Report frequencies with high carrier errors to have zero
2450 f_error
= bcm2048_get_fm_carrier_error(bdev
);
2451 if (f_error
< BCM2048_FREQ_ERROR_FLOOR
||
2452 f_error
> BCM2048_FREQ_ERROR_ROOF
) {
2456 * RSSI level -60 dB is defined to report full
2459 rssi
= bcm2048_get_fm_rssi(bdev
);
2460 if (rssi
>= BCM2048_RSSI_LEVEL_BASE
) {
2461 tuner
->signal
= 0xFFFF;
2462 } else if (rssi
> BCM2048_RSSI_LEVEL_ROOF
) {
2463 tuner
->signal
= (rssi
+
2464 BCM2048_RSSI_LEVEL_ROOF_NEG
)
2465 * BCM2048_SIGNAL_MULTIPLIER
;
2477 static int bcm2048_vidioc_s_tuner(struct file
*file
, void *priv
,
2478 const struct v4l2_tuner
*tuner
)
2480 struct bcm2048_device
*bdev
= video_get_drvdata(video_devdata(file
));
2485 if (tuner
->index
> 0)
2491 static int bcm2048_vidioc_g_frequency(struct file
*file
, void *priv
,
2492 struct v4l2_frequency
*freq
)
2494 struct bcm2048_device
*bdev
= video_get_drvdata(video_devdata(file
));
2498 if (!bdev
->power_state
)
2501 freq
->type
= V4L2_TUNER_RADIO
;
2502 f
= bcm2048_get_fm_frequency(bdev
);
2507 freq
->frequency
= dev_to_v4l2(f
);
2512 static int bcm2048_vidioc_s_frequency(struct file
*file
, void *priv
,
2513 const struct v4l2_frequency
*freq
)
2515 struct bcm2048_device
*bdev
= video_get_drvdata(video_devdata(file
));
2518 if (freq
->type
!= V4L2_TUNER_RADIO
)
2521 if (!bdev
->power_state
)
2524 err
= bcm2048_set_fm_frequency(bdev
, v4l2_to_dev(freq
->frequency
));
2525 err
|= bcm2048_set_fm_search_tune_mode(bdev
, BCM2048_FM_PRE_SET_MODE
);
2530 static int bcm2048_vidioc_s_hw_freq_seek(struct file
*file
, void *priv
,
2531 const struct v4l2_hw_freq_seek
*seek
)
2533 struct bcm2048_device
*bdev
= video_get_drvdata(video_devdata(file
));
2536 if (!bdev
->power_state
)
2539 if ((seek
->tuner
!= 0) || (seek
->type
!= V4L2_TUNER_RADIO
))
2542 err
= bcm2048_set_fm_search_mode_direction(bdev
, seek
->seek_upward
);
2543 err
|= bcm2048_set_fm_search_tune_mode(bdev
,
2544 BCM2048_FM_AUTO_SEARCH_MODE
);
2549 static struct v4l2_ioctl_ops bcm2048_ioctl_ops
= {
2550 .vidioc_querycap
= bcm2048_vidioc_querycap
,
2551 .vidioc_g_input
= bcm2048_vidioc_g_input
,
2552 .vidioc_s_input
= bcm2048_vidioc_s_input
,
2553 .vidioc_queryctrl
= bcm2048_vidioc_queryctrl
,
2554 .vidioc_g_ctrl
= bcm2048_vidioc_g_ctrl
,
2555 .vidioc_s_ctrl
= bcm2048_vidioc_s_ctrl
,
2556 .vidioc_g_audio
= bcm2048_vidioc_g_audio
,
2557 .vidioc_s_audio
= bcm2048_vidioc_s_audio
,
2558 .vidioc_g_tuner
= bcm2048_vidioc_g_tuner
,
2559 .vidioc_s_tuner
= bcm2048_vidioc_s_tuner
,
2560 .vidioc_g_frequency
= bcm2048_vidioc_g_frequency
,
2561 .vidioc_s_frequency
= bcm2048_vidioc_s_frequency
,
2562 .vidioc_s_hw_freq_seek
= bcm2048_vidioc_s_hw_freq_seek
,
2566 * bcm2048_viddev_template - video device interface
2568 static struct video_device bcm2048_viddev_template
= {
2569 .fops
= &bcm2048_fops
,
2570 .name
= BCM2048_DRIVER_NAME
,
2571 .release
= video_device_release_empty
,
2572 .ioctl_ops
= &bcm2048_ioctl_ops
,
2576 * I2C driver interface
2578 static int bcm2048_i2c_driver_probe(struct i2c_client
*client
,
2579 const struct i2c_device_id
*id
)
2581 struct bcm2048_device
*bdev
;
2584 bdev
= kzalloc(sizeof(*bdev
), GFP_KERNEL
);
2590 bdev
->client
= client
;
2591 i2c_set_clientdata(client
, bdev
);
2592 mutex_init(&bdev
->mutex
);
2593 init_completion(&bdev
->compl);
2594 INIT_WORK(&bdev
->work
, bcm2048_work
);
2597 err
= request_irq(client
->irq
,
2598 bcm2048_handler
, IRQF_TRIGGER_FALLING
,
2599 client
->name
, bdev
);
2601 dev_err(&client
->dev
, "Could not request IRQ\n");
2604 dev_dbg(&client
->dev
, "IRQ requested.\n");
2606 dev_dbg(&client
->dev
, "IRQ not configured. Using timeouts.\n");
2609 bdev
->videodev
= bcm2048_viddev_template
;
2610 video_set_drvdata(&bdev
->videodev
, bdev
);
2611 if (video_register_device(&bdev
->videodev
, VFL_TYPE_RADIO
, radio_nr
)) {
2612 dev_dbg(&client
->dev
, "Could not register video device.\n");
2617 err
= bcm2048_sysfs_register_properties(bdev
);
2619 dev_dbg(&client
->dev
, "Could not register sysfs interface.\n");
2620 goto free_registration
;
2623 err
= bcm2048_probe(bdev
);
2625 dev_dbg(&client
->dev
, "Failed to probe device information.\n");
2632 bcm2048_sysfs_unregister_properties(bdev
, ARRAY_SIZE(attrs
));
2634 video_unregister_device(&bdev
->videodev
);
2637 free_irq(client
->irq
, bdev
);
2639 i2c_set_clientdata(client
, NULL
);
2645 static int __exit
bcm2048_i2c_driver_remove(struct i2c_client
*client
)
2647 struct bcm2048_device
*bdev
= i2c_get_clientdata(client
);
2649 if (!client
->adapter
)
2653 bcm2048_sysfs_unregister_properties(bdev
, ARRAY_SIZE(attrs
));
2654 video_unregister_device(&bdev
->videodev
);
2656 if (bdev
->power_state
)
2657 bcm2048_set_power_state(bdev
, BCM2048_POWER_OFF
);
2659 if (client
->irq
> 0)
2660 free_irq(client
->irq
, bdev
);
2662 cancel_work_sync(&bdev
->work
);
2671 * bcm2048_i2c_driver - i2c driver interface
2673 static const struct i2c_device_id bcm2048_id
[] = {
2677 MODULE_DEVICE_TABLE(i2c
, bcm2048_id
);
2679 static struct i2c_driver bcm2048_i2c_driver
= {
2681 .name
= BCM2048_DRIVER_NAME
,
2683 .probe
= bcm2048_i2c_driver_probe
,
2684 .remove
= __exit_p(bcm2048_i2c_driver_remove
),
2685 .id_table
= bcm2048_id
,
2688 module_i2c_driver(bcm2048_i2c_driver
);
2690 MODULE_LICENSE("GPL");
2691 MODULE_AUTHOR(BCM2048_DRIVER_AUTHOR
);
2692 MODULE_DESCRIPTION(BCM2048_DRIVER_DESC
);
2693 MODULE_VERSION("0.0.2");