3 * (The TDA9875 is used on the Diamond DTV2000 french version
4 * Other cards probably use these chips as well.)
5 * This driver will not complain if used with any
6 * other i2c device with the same address.
8 * Copyright (c) 2000 Guillaume Delvit based on Gerd Knorr source and
10 * Copyright (c) 2006 Mauro Carvalho Chehab <mchehab@infradead.org>
11 * This code is placed under the terms of the GNU General Public License
12 * Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu)
13 * Which was based on tda8425.c by Greg Alexander (c) 1998
16 * debug - set to 1 if you'd like to see debug messages
18 * Revision: 0.1 - original version
21 #include <linux/module.h>
22 #include <linux/kernel.h>
23 #include <linux/string.h>
24 #include <linux/timer.h>
25 #include <linux/delay.h>
26 #include <linux/errno.h>
27 #include <linux/slab.h>
28 #include <linux/i2c.h>
29 #include <linux/videodev2.h>
30 #include <media/v4l2-device.h>
31 #include <media/v4l2-i2c-drv-legacy.h>
32 #include <media/i2c-addr.h>
34 static int debug; /* insmod parameter */
35 module_param(debug, int, S_IRUGO | S_IWUSR);
36 MODULE_LICENSE("GPL");
38 /* Addresses to scan */
39 static unsigned short normal_i2c[] = {
40 I2C_ADDR_TDA9875 >> 1,
46 /* This is a superset of the TDA9875 */
48 struct v4l2_subdev sd;
53 static inline struct tda9875 *to_state(struct v4l2_subdev *sd)
55 return container_of(sd, struct tda9875, sd);
58 #define dprintk if (debug) printk
60 /* The TDA9875 is made by Philips Semiconductor
61 * http://www.semiconductors.philips.com
62 * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
66 /* subaddresses for TDA9875 */
67 #define TDA9875_MUT 0x12 /*General mute (value --> 0b11001100*/
68 #define TDA9875_CFG 0x01 /* Config register (value --> 0b00000000 */
69 #define TDA9875_DACOS 0x13 /*DAC i/o select (ADC) 0b0000100*/
70 #define TDA9875_LOSR 0x16 /*Line output select regirter 0b0100 0001*/
72 #define TDA9875_CH1V 0x0c /*Channel 1 volume (mute)*/
73 #define TDA9875_CH2V 0x0d /*Channel 2 volume (mute)*/
74 #define TDA9875_SC1 0x14 /*SCART 1 in (mono)*/
75 #define TDA9875_SC2 0x15 /*SCART 2 in (mono)*/
77 #define TDA9875_ADCIS 0x17 /*ADC input select (mono) 0b0110 000*/
78 #define TDA9875_AER 0x19 /*Audio effect (AVL+Pseudo) 0b0000 0110*/
79 #define TDA9875_MCS 0x18 /*Main channel select (DAC) 0b0000100*/
80 #define TDA9875_MVL 0x1a /* Main volume gauche */
81 #define TDA9875_MVR 0x1b /* Main volume droite */
82 #define TDA9875_MBA 0x1d /* Main Basse */
83 #define TDA9875_MTR 0x1e /* Main treble */
84 #define TDA9875_ACS 0x1f /* Auxilary channel select (FM) 0b0000000*/
85 #define TDA9875_AVL 0x20 /* Auxilary volume gauche */
86 #define TDA9875_AVR 0x21 /* Auxilary volume droite */
87 #define TDA9875_ABA 0x22 /* Auxilary Basse */
88 #define TDA9875_ATR 0x23 /* Auxilary treble */
90 #define TDA9875_MSR 0x02 /* Monitor select register */
91 #define TDA9875_C1MSB 0x03 /* Carrier 1 (FM) frequency register MSB */
92 #define TDA9875_C1MIB 0x04 /* Carrier 1 (FM) frequency register (16-8]b */
93 #define TDA9875_C1LSB 0x05 /* Carrier 1 (FM) frequency register LSB */
94 #define TDA9875_C2MSB 0x06 /* Carrier 2 (nicam) frequency register MSB */
95 #define TDA9875_C2MIB 0x07 /* Carrier 2 (nicam) frequency register (16-8]b */
96 #define TDA9875_C2LSB 0x08 /* Carrier 2 (nicam) frequency register LSB */
97 #define TDA9875_DCR 0x09 /* Demodulateur configuration regirter*/
98 #define TDA9875_DEEM 0x0a /* FM de-emphasis regirter*/
99 #define TDA9875_FMAT 0x0b /* FM Matrix regirter*/
102 #define TDA9875_MUTE_ON 0xff /* general mute */
103 #define TDA9875_MUTE_OFF 0xcc /* general no mute */
109 static int tda9875_write(struct v4l2_subdev *sd, int subaddr, unsigned char val)
111 struct i2c_client *client = v4l2_get_subdevdata(sd);
112 unsigned char buffer[2];
114 v4l2_dbg(1, debug, sd, "Writing %d 0x%x\n", subaddr, val);
117 if (2 != i2c_master_send(client, buffer, 2)) {
118 v4l2_warn(sd, "I/O error, trying (write %d 0x%x)\n",
126 static int i2c_read_register(struct i2c_client *client, int addr, int reg)
128 unsigned char write[1];
129 unsigned char read[1];
130 struct i2c_msg msgs[2] = {
131 { addr, 0, 1, write },
132 { addr, I2C_M_RD, 1, read }
137 if (2 != i2c_transfer(client->adapter, msgs, 2)) {
138 v4l_warn(client, "I/O error (read2)\n");
141 v4l_dbg(1, debug, client, "chip_read2: reg%d=0x%x\n", reg, read[0]);
145 static void tda9875_set(struct v4l2_subdev *sd)
147 struct tda9875 *tda = to_state(sd);
150 v4l2_dbg(1, debug, sd, "tda9875_set(%04x,%04x,%04x,%04x)\n",
151 tda->lvol, tda->rvol, tda->bass, tda->treble);
153 a = tda->lvol & 0xff;
154 tda9875_write(sd, TDA9875_MVL, a);
156 tda9875_write(sd, TDA9875_MVR, a);
158 tda9875_write(sd, TDA9875_MBA, a);
159 a =tda->treble & 0xff;
160 tda9875_write(sd, TDA9875_MTR, a);
163 static void do_tda9875_init(struct v4l2_subdev *sd)
165 struct tda9875 *t = to_state(sd);
167 v4l2_dbg(1, debug, sd, "In tda9875_init\n");
168 tda9875_write(sd, TDA9875_CFG, 0xd0); /*reg de config 0 (reset)*/
169 tda9875_write(sd, TDA9875_MSR, 0x03); /* Monitor 0b00000XXX*/
170 tda9875_write(sd, TDA9875_C1MSB, 0x00); /*Car1(FM) MSB XMHz*/
171 tda9875_write(sd, TDA9875_C1MIB, 0x00); /*Car1(FM) MIB XMHz*/
172 tda9875_write(sd, TDA9875_C1LSB, 0x00); /*Car1(FM) LSB XMHz*/
173 tda9875_write(sd, TDA9875_C2MSB, 0x00); /*Car2(NICAM) MSB XMHz*/
174 tda9875_write(sd, TDA9875_C2MIB, 0x00); /*Car2(NICAM) MIB XMHz*/
175 tda9875_write(sd, TDA9875_C2LSB, 0x00); /*Car2(NICAM) LSB XMHz*/
176 tda9875_write(sd, TDA9875_DCR, 0x00); /*Demod config 0x00*/
177 tda9875_write(sd, TDA9875_DEEM, 0x44); /*DE-Emph 0b0100 0100*/
178 tda9875_write(sd, TDA9875_FMAT, 0x00); /*FM Matrix reg 0x00*/
179 tda9875_write(sd, TDA9875_SC1, 0x00); /* SCART 1 (SC1)*/
180 tda9875_write(sd, TDA9875_SC2, 0x01); /* SCART 2 (sc2)*/
182 tda9875_write(sd, TDA9875_CH1V, 0x10); /* Channel volume 1 mute*/
183 tda9875_write(sd, TDA9875_CH2V, 0x10); /* Channel volume 2 mute */
184 tda9875_write(sd, TDA9875_DACOS, 0x02); /* sig DAC i/o(in:nicam)*/
185 tda9875_write(sd, TDA9875_ADCIS, 0x6f); /* sig ADC input(in:mono)*/
186 tda9875_write(sd, TDA9875_LOSR, 0x00); /* line out (in:mono)*/
187 tda9875_write(sd, TDA9875_AER, 0x00); /*06 Effect (AVL+PSEUDO) */
188 tda9875_write(sd, TDA9875_MCS, 0x44); /* Main ch select (DAC) */
189 tda9875_write(sd, TDA9875_MVL, 0x03); /* Vol Main left 10dB */
190 tda9875_write(sd, TDA9875_MVR, 0x03); /* Vol Main right 10dB*/
191 tda9875_write(sd, TDA9875_MBA, 0x00); /* Main Bass Main 0dB*/
192 tda9875_write(sd, TDA9875_MTR, 0x00); /* Main Treble Main 0dB*/
193 tda9875_write(sd, TDA9875_ACS, 0x44); /* Aux chan select (dac)*/
194 tda9875_write(sd, TDA9875_AVL, 0x00); /* Vol Aux left 0dB*/
195 tda9875_write(sd, TDA9875_AVR, 0x00); /* Vol Aux right 0dB*/
196 tda9875_write(sd, TDA9875_ABA, 0x00); /* Aux Bass Main 0dB*/
197 tda9875_write(sd, TDA9875_ATR, 0x00); /* Aux Aigus Main 0dB*/
199 tda9875_write(sd, TDA9875_MUT, 0xcc); /* General mute */
201 t->lvol = t->rvol = 0; /* 0dB */
202 t->bass = 0; /* 0dB */
203 t->treble = 0; /* 0dB */
208 static int tda9875_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
210 struct tda9875 *t = to_state(sd);
213 case V4L2_CID_AUDIO_VOLUME:
215 int left = (t->lvol+84)*606;
216 int right = (t->rvol+84)*606;
218 ctrl->value=max(left,right);
221 case V4L2_CID_AUDIO_BALANCE:
223 int left = (t->lvol+84)*606;
224 int right = (t->rvol+84)*606;
225 int volume = max(left,right);
226 int balance = (32768*min(left,right))/
227 (volume ? volume : 1);
228 ctrl->value=(left<right)?
229 (65535-balance) : balance;
232 case V4L2_CID_AUDIO_BASS:
233 ctrl->value = (t->bass+12)*2427; /* min -12 max +15 */
235 case V4L2_CID_AUDIO_TREBLE:
236 ctrl->value = (t->treble+12)*2730;/* min -12 max +12 */
242 static int tda9875_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
244 struct tda9875 *t = to_state(sd);
245 int chvol = 0, volume = 0, balance = 0, left, right;
248 case V4L2_CID_AUDIO_VOLUME:
249 left = (t->lvol+84)*606;
250 right = (t->rvol+84)*606;
252 volume = max(left,right);
253 balance = (32768*min(left,right))/
254 (volume ? volume : 1);
255 balance =(left<right)?
256 (65535-balance) : balance;
258 volume = ctrl->value;
262 case V4L2_CID_AUDIO_BALANCE:
263 left = (t->lvol+84)*606;
264 right = (t->rvol+84)*606;
266 volume=max(left,right);
268 balance = ctrl->value;
272 case V4L2_CID_AUDIO_BASS:
273 t->bass = ((ctrl->value/2400)-12) & 0xff;
277 t->bass = -12 & 0xff;
279 case V4L2_CID_AUDIO_TREBLE:
280 t->treble = ((ctrl->value/2700)-12) & 0xff;
284 t->treble = -12 & 0xff;
291 left = (min(65536 - balance,32768) *
293 right = (min(balance,32768) *
295 t->lvol = ((left/606)-84) & 0xff;
299 t->lvol = -84 & 0xff;
301 t->rvol = ((right/606)-84) & 0xff;
305 t->rvol = -84 & 0xff;
312 static int tda9875_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
315 case V4L2_CID_AUDIO_VOLUME:
316 case V4L2_CID_AUDIO_BASS:
317 case V4L2_CID_AUDIO_TREBLE:
318 return v4l2_ctrl_query_fill_std(qc);
323 static int tda9875_command(struct i2c_client *client, unsigned cmd, void *arg)
325 return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
328 /* ----------------------------------------------------------------------- */
330 static const struct v4l2_subdev_core_ops tda9875_core_ops = {
331 .queryctrl = tda9875_queryctrl,
332 .g_ctrl = tda9875_g_ctrl,
333 .s_ctrl = tda9875_s_ctrl,
336 static const struct v4l2_subdev_ops tda9875_ops = {
337 .core = &tda9875_core_ops,
340 /* ----------------------------------------------------------------------- */
343 /* *********************** *
344 * i2c interface functions *
345 * *********************** */
347 static int tda9875_checkit(struct i2c_client *client, int addr)
351 dic = i2c_read_register(client, addr, 254);
352 rev = i2c_read_register(client, addr, 255);
354 if (dic == 0 || dic == 2) { /* tda9875 and tda9875A */
355 v4l_info(client, "tda9875%s rev. %d detected at 0x%02x\n",
356 dic == 0 ? "" : "A", rev, addr << 1);
359 v4l_info(client, "no such chip at 0x%02x (dic=0x%x rev=0x%x)\n",
360 addr << 1, dic, rev);
364 static int tda9875_probe(struct i2c_client *client,
365 const struct i2c_device_id *id)
368 struct v4l2_subdev *sd;
370 v4l_info(client, "chip found @ 0x%02x (%s)\n",
371 client->addr << 1, client->adapter->name);
373 if (!tda9875_checkit(client, client->addr))
376 t = kzalloc(sizeof(*t), GFP_KERNEL);
380 v4l2_i2c_subdev_init(sd, client, &tda9875_ops);
386 static int tda9875_remove(struct i2c_client *client)
388 struct v4l2_subdev *sd = i2c_get_clientdata(client);
391 v4l2_device_unregister_subdev(sd);
396 static const struct i2c_device_id tda9875_id[] = {
400 MODULE_DEVICE_TABLE(i2c, tda9875_id);
402 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
404 .driverid = I2C_DRIVERID_TDA9875,
405 .command = tda9875_command,
406 .probe = tda9875_probe,
407 .remove = tda9875_remove,
408 .id_table = tda9875_id,