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 * This code is placed under the terms of the GNU General Public License
11 * Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu)
12 * Which was based on tda8425.c by Greg Alexander (c) 1998
15 * debug - set to 1 if you'd like to see debug messages
17 * Revision: 0.1 - original version
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/sched.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/videodev.h>
29 #include <linux/i2c.h>
30 #include <linux/i2c-algo-bit.h>
31 #include <linux/init.h>
34 #include <media/audiochip.h>
36 static int debug; /* insmod parameter */
37 module_param(debug, int, S_IRUGO | S_IWUSR);
38 MODULE_LICENSE("GPL");
41 /* Addresses to scan */
42 static unsigned short normal_i2c[] = {
48 /* This is a superset of the TDA9875 */
56 static struct i2c_driver driver;
57 static struct i2c_client client_template;
59 #define dprintk if (debug) printk
61 /* The TDA9875 is made by Philips Semiconductor
62 * http://www.semiconductors.philips.com
63 * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
67 /* subaddresses for TDA9875 */
68 #define TDA9875_MUT 0x12 /*General mute (value --> 0b11001100*/
69 #define TDA9875_CFG 0x01 /* Config register (value --> 0b00000000 */
70 #define TDA9875_DACOS 0x13 /*DAC i/o select (ADC) 0b0000100*/
71 #define TDA9875_LOSR 0x16 /*Line output select regirter 0b0100 0001*/
73 #define TDA9875_CH1V 0x0c /*Channel 1 volume (mute)*/
74 #define TDA9875_CH2V 0x0d /*Channel 2 volume (mute)*/
75 #define TDA9875_SC1 0x14 /*SCART 1 in (mono)*/
76 #define TDA9875_SC2 0x15 /*SCART 2 in (mono)*/
78 #define TDA9875_ADCIS 0x17 /*ADC input select (mono) 0b0110 000*/
79 #define TDA9875_AER 0x19 /*Audio effect (AVL+Pseudo) 0b0000 0110*/
80 #define TDA9875_MCS 0x18 /*Main channel select (DAC) 0b0000100*/
81 #define TDA9875_MVL 0x1a /* Main volume gauche */
82 #define TDA9875_MVR 0x1b /* Main volume droite */
83 #define TDA9875_MBA 0x1d /* Main Basse */
84 #define TDA9875_MTR 0x1e /* Main treble */
85 #define TDA9875_ACS 0x1f /* Auxilary channel select (FM) 0b0000000*/
86 #define TDA9875_AVL 0x20 /* Auxilary volume gauche */
87 #define TDA9875_AVR 0x21 /* Auxilary volume droite */
88 #define TDA9875_ABA 0x22 /* Auxilary Basse */
89 #define TDA9875_ATR 0x23 /* Auxilary treble */
91 #define TDA9875_MSR 0x02 /* Monitor select register */
92 #define TDA9875_C1MSB 0x03 /* Carrier 1 (FM) frequency register MSB */
93 #define TDA9875_C1MIB 0x04 /* Carrier 1 (FM) frequency register (16-8]b */
94 #define TDA9875_C1LSB 0x05 /* Carrier 1 (FM) frequency register LSB */
95 #define TDA9875_C2MSB 0x06 /* Carrier 2 (nicam) frequency register MSB */
96 #define TDA9875_C2MIB 0x07 /* Carrier 2 (nicam) frequency register (16-8]b */
97 #define TDA9875_C2LSB 0x08 /* Carrier 2 (nicam) frequency register LSB */
98 #define TDA9875_DCR 0x09 /* Demodulateur configuration regirter*/
99 #define TDA9875_DEEM 0x0a /* FM de-emphasis regirter*/
100 #define TDA9875_FMAT 0x0b /* FM Matrix regirter*/
103 #define TDA9875_MUTE_ON 0xff /* general mute */
104 #define TDA9875_MUTE_OFF 0xcc /* general no mute */
110 static int tda9875_write(struct i2c_client *client, int subaddr, unsigned char val)
112 unsigned char buffer[2];
113 dprintk("In tda9875_write\n");
114 dprintk("Writing %d 0x%x\n", subaddr, val);
117 if (2 != i2c_master_send(client,buffer,2)) {
118 printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n",
126 static int i2c_read_register(struct i2c_adapter *adap, 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 }
136 if (2 != i2c_transfer(adap,msgs,2)) {
137 printk(KERN_WARNING "tda9875: I/O error (read2)\n");
140 dprintk("tda9875: chip_read2: reg%d=0x%x\n",reg,read[0]);
144 static void tda9875_set(struct i2c_client *client)
146 struct tda9875 *tda = i2c_get_clientdata(client);
149 dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n",
150 tda->lvol,tda->rvol,tda->bass,tda->treble);
153 a = tda->lvol & 0xff;
154 tda9875_write(client, TDA9875_MVL, a);
156 tda9875_write(client, TDA9875_MVR, a);
158 tda9875_write(client, TDA9875_MBA, a);
159 a =tda->treble & 0xff;
160 tda9875_write(client, TDA9875_MTR, a);
163 static void do_tda9875_init(struct i2c_client *client)
165 struct tda9875 *t = i2c_get_clientdata(client);
166 dprintk("In tda9875_init\n");
167 tda9875_write(client, TDA9875_CFG, 0xd0 ); /*reg de config 0 (reset)*/
168 tda9875_write(client, TDA9875_MSR, 0x03 ); /* Monitor 0b00000XXX*/
169 tda9875_write(client, TDA9875_C1MSB, 0x00 ); /*Car1(FM) MSB XMHz*/
170 tda9875_write(client, TDA9875_C1MIB, 0x00 ); /*Car1(FM) MIB XMHz*/
171 tda9875_write(client, TDA9875_C1LSB, 0x00 ); /*Car1(FM) LSB XMHz*/
172 tda9875_write(client, TDA9875_C2MSB, 0x00 ); /*Car2(NICAM) MSB XMHz*/
173 tda9875_write(client, TDA9875_C2MIB, 0x00 ); /*Car2(NICAM) MIB XMHz*/
174 tda9875_write(client, TDA9875_C2LSB, 0x00 ); /*Car2(NICAM) LSB XMHz*/
175 tda9875_write(client, TDA9875_DCR, 0x00 ); /*Demod config 0x00*/
176 tda9875_write(client, TDA9875_DEEM, 0x44 ); /*DE-Emph 0b0100 0100*/
177 tda9875_write(client, TDA9875_FMAT, 0x00 ); /*FM Matrix reg 0x00*/
178 tda9875_write(client, TDA9875_SC1, 0x00 ); /* SCART 1 (SC1)*/
179 tda9875_write(client, TDA9875_SC2, 0x01 ); /* SCART 2 (sc2)*/
181 tda9875_write(client, TDA9875_CH1V, 0x10 ); /* Channel volume 1 mute*/
182 tda9875_write(client, TDA9875_CH2V, 0x10 ); /* Channel volume 2 mute */
183 tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/
184 tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/
185 tda9875_write(client, TDA9875_LOSR, 0x00 ); /* line out (in:mono)*/
186 tda9875_write(client, TDA9875_AER, 0x00 ); /*06 Effect (AVL+PSEUDO) */
187 tda9875_write(client, TDA9875_MCS, 0x44 ); /* Main ch select (DAC) */
188 tda9875_write(client, TDA9875_MVL, 0x03 ); /* Vol Main left 10dB */
189 tda9875_write(client, TDA9875_MVR, 0x03 ); /* Vol Main right 10dB*/
190 tda9875_write(client, TDA9875_MBA, 0x00 ); /* Main Bass Main 0dB*/
191 tda9875_write(client, TDA9875_MTR, 0x00 ); /* Main Treble Main 0dB*/
192 tda9875_write(client, TDA9875_ACS, 0x44 ); /* Aux chan select (dac)*/
193 tda9875_write(client, TDA9875_AVL, 0x00 ); /* Vol Aux left 0dB*/
194 tda9875_write(client, TDA9875_AVR, 0x00 ); /* Vol Aux right 0dB*/
195 tda9875_write(client, TDA9875_ABA, 0x00 ); /* Aux Bass Main 0dB*/
196 tda9875_write(client, TDA9875_ATR, 0x00 ); /* Aux Aigus Main 0dB*/
198 tda9875_write(client, TDA9875_MUT, 0xcc ); /* General mute */
200 t->mode=AUDIO_UNMUTE;
201 t->lvol=t->rvol =0; /* 0dB */
203 t->treble=0; /* 0dB */
209 /* *********************** *
210 * i2c interface functions *
211 * *********************** */
213 static int tda9875_checkit(struct i2c_adapter *adap, int addr)
217 dic=i2c_read_register(adap,addr,254);
218 rev=i2c_read_register(adap,addr,255);
220 if(dic==0 || dic==2) { // tda9875 and tda9875A
221 printk("tda9875: TDA9875%s Rev.%d detected at 0x%x\n",
222 dic==0?"":"A", rev,addr<<1);
225 printk("tda9875: no such chip at 0x%x (dic=0x%x rev=0x%x)\n",addr<<1,dic,rev);
229 static int tda9875_attach(struct i2c_adapter *adap, int addr, int kind)
232 struct i2c_client *client;
233 dprintk("In tda9875_attach\n");
235 t = kmalloc(sizeof *t,GFP_KERNEL);
238 memset(t,0,sizeof *t);
241 memcpy(client,&client_template,sizeof(struct i2c_client));
242 client->adapter = adap;
244 i2c_set_clientdata(client, t);
246 if(!tda9875_checkit(adap,addr)) {
251 do_tda9875_init(client);
252 printk(KERN_INFO "tda9875: init\n");
254 i2c_attach_client(client);
258 static int tda9875_probe(struct i2c_adapter *adap)
260 if (adap->class & I2C_CLASS_TV_ANALOG)
261 return i2c_probe(adap, &addr_data, tda9875_attach);
265 static int tda9875_detach(struct i2c_client *client)
267 struct tda9875 *t = i2c_get_clientdata(client);
269 do_tda9875_init(client);
270 i2c_detach_client(client);
276 static int tda9875_command(struct i2c_client *client,
277 unsigned int cmd, void *arg)
279 struct tda9875 *t = i2c_get_clientdata(client);
281 dprintk("In tda9875_command...\n");
284 /* --- v4l ioctls --- */
285 /* take care: bttv does userspace copying, we'll get a
286 kernel pointer here... */
289 struct video_audio *va = arg;
292 dprintk("VIDIOCGAUDIO\n");
294 va->flags |= VIDEO_AUDIO_VOLUME |
298 /* min is -84 max is 24 */
299 left = (t->lvol+84)*606;
300 right = (t->rvol+84)*606;
301 va->volume=max(left,right);
302 va->balance=(32768*min(left,right))/
303 (va->volume ? va->volume : 1);
304 va->balance=(left<right)?
305 (65535-va->balance) : va->balance;
306 va->bass = (t->bass+12)*2427; /* min -12 max +15 */
307 va->treble = (t->treble+12)*2730;/* min -12 max +12 */
308 va->mode |= VIDEO_SOUND_MONO;
310 break; /* VIDIOCGAUDIO case */
315 struct video_audio *va = arg;
318 dprintk("VIDEOCSAUDIO...\n");
319 left = (min(65536 - va->balance,32768) *
321 right = (min(va->balance,(__u16)32768) *
323 t->lvol = ((left/606)-84) & 0xff;
327 t->lvol = -84 & 0xff;
329 t->rvol = ((right/606)-84) & 0xff;
333 t->rvol = -84 & 0xff;
335 t->bass = ((va->bass/2400)-12) & 0xff;
339 t->bass = -12 & 0xff;
341 t->treble = ((va->treble/2700)-12) & 0xff;
345 t->treble = -12 & 0xff;
349 //printk("tda9875 bal:%04x vol:%04x bass:%04x treble:%04x\n",va->balance,va->volume,va->bass,va->treble);
356 } /* end of VIDEOCSAUDIO case */
358 default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
361 dprintk("Default\n");
363 } /* end of (cmd) switch */
369 static struct i2c_driver driver = {
371 .name = "i2c tda9875 driver",
373 .id = I2C_DRIVERID_TDA9875,
374 .attach_adapter = tda9875_probe,
375 .detach_client = tda9875_detach,
376 .command = tda9875_command,
379 static struct i2c_client client_template =
385 static int __init tda9875_init(void)
387 return i2c_add_driver(&driver);
390 static void __exit tda9875_fini(void)
392 i2c_del_driver(&driver);
395 module_init(tda9875_init);
396 module_exit(tda9875_fini);