patch-2.3.99-pre9 linux/drivers/char/tda9875.c

• Lines: 372
• Date: Mon May 15 12:06:25 2000
• Orig file: v2.3.99-pre8/linux/drivers/char/tda9875.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.99-pre8/linux/drivers/char/tda9875.c linux/drivers/char/tda9875.c
@@ -0,0 +1,371 @@
+/*
+ * For the TDA9875 chip
+ * (The TDA9875 is used on the Diamond DTV2000 french version 
+ * Other cards probably use these chips as well.)
+ * This driver will not complain if used with any 
+ * other i2c device with the same address.
+ *
+ * Copyright (c) 2000 Guillamue Delvit based on Gerd Knorr source and
+ * Eric Sandeen 
+ * This code is placed under the terms of the GNU General Public License
+ * Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu)
+ * Which was based on tda8425.c by Greg Alexander (c) 1998
+ *
+ * OPTIONS:
+ * debug   - set to 1 if you'd like to see debug messages
+ * 
+ *  Revision: 0.1 - original version
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/malloc.h>
+#include <linux/videodev.h>
+#include <linux/i2c.h>
+#include <linux/i2c-algo-bit.h>
+
+#include "bttv.h"
+#include "audiochip.h"
+
+/* This driver ID is brand new, so define it if it's not in i2c-id.h yet */
+#ifndef I2C_DRIVERID_TDA9875
+  #define I2C_DRIVERID_TDA9875  28
+#endif
+
+
+MODULE_PARM(debug,"i");
+
+static int debug = 0;	/* insmod parameter */
+
+/* Addresses to scan */
+static unsigned short normal_i2c[] =  {
+    I2C_TDA9875 >> 1,
+    I2C_CLIENT_END};
+static unsigned short normal_i2c_range[] = {I2C_CLIENT_END};
+static unsigned short probe[2]        = { I2C_CLIENT_END, I2C_CLIENT_END };
+static unsigned short probe_range[2]  = { I2C_CLIENT_END, I2C_CLIENT_END };
+static unsigned short ignore[2]       = { I2C_CLIENT_END, I2C_CLIENT_END };
+static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
+static unsigned short force[2]        = { I2C_CLIENT_END, I2C_CLIENT_END };
+static struct i2c_client_address_data addr_data = {
+	normal_i2c, normal_i2c_range, 
+	probe, probe_range, 
+	ignore, ignore_range, 
+	force
+};
+
+/* This is a superset of the TDA9875 */
+struct tda9875 {
+	int mode;
+	int rvol, lvol;
+	int bass, treble;
+};
+
+
+static struct i2c_driver driver;
+static struct i2c_client client_template;
+
+#define dprintk  if (debug) printk
+
+/* The TDA9875 is made by Philips Semiconductor
+ * http://www.semiconductors.philips.com
+ * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
+ *
+ */ 
+
+		/* subaddresses for TDA9875 */
+#define TDA9875_MUT         0x12  /*General mute  (value --> 0b11001100*/
+#define TDA9875_CFG         0x01  /* Config register (value --> 0b00000000 */
+#define TDA9875_DACOS       0x13  /*DAC i/o select (ADC) 0b0000100*/
+#define TDA9875_LOSR        0x16  /*Line output select regirter 0b0100 0001*/
+
+#define TDA9875_CH1V        0x0c  /*Chanel 1 volume (mute)*/
+#define TDA9875_CH2V        0x0d  /*Chanel 2 volume (mute)*/
+#define TDA9875_SC1         0x14  /*SCART 1 in (mono)*/
+#define TDA9875_SC2         0x15  /*SCART 2 in (mono)*/
+
+#define TDA9875_ADCIS       0x17  /*ADC input select (mono) 0b0110 000*/
+#define TDA9875_AER         0x19  /*Audio effect (AVL+Pseudo) 0b0000 0110*/
+#define TDA9875_MCS         0x18  /*Main channel select (DAC) 0b0000100*/
+#define TDA9875_MVL         0x1a  /* Main volume gauche */
+#define TDA9875_MVR         0x1b  /* Main volume droite */
+#define TDA9875_MBA         0x1d  /* Main Basse */
+#define TDA9875_MTR         0x1e  /* Main treble */
+#define TDA9875_ACS         0x1f  /* Auxilary channel select (FM) 0b0000000*/
+#define TDA9875_AVL         0x20  /* Auxilary volume gauche */
+#define TDA9875_AVR         0x21  /* Auxilary volume droite */
+#define TDA9875_ABA         0x22  /* Auxilary Basse */
+#define TDA9875_ATR         0x23  /* Auxilary treble */
+
+#define TDA9875_MSR         0x02  /* Monitor select register */
+#define TDA9875_C1MSB       0x03  /* Carrier 1 (FM) frequency register MSB */
+#define TDA9875_C1MIB       0x04  /* Carrier 1 (FM) frequency register (16-8]b */
+#define TDA9875_C1LSB       0x05  /* Carrier 1 (FM) frequency register LSB */
+#define TDA9875_C2MSB       0x06  /* Carrier 2 (nicam) frequency register MSB */
+#define TDA9875_C2MIB       0x07  /* Carrier 2 (nicam) frequency register (16-8]b */
+#define TDA9875_C2LSB       0x08  /* Carrier 2 (nicam) frequency register LSB */
+#define TDA9875_DCR         0x09  /* Demodulateur configuration regirter*/
+#define TDA9875_DEEM        0x0a  /* FM de-emphasis regirter*/
+#define TDA9875_FMAT        0x0b  /* FM Matrix regirter*/
+
+/* values */
+#define TDA9875_MUTE_ON	    0xff /* general mute */
+#define TDA9875_MUTE_OFF    0xcc /* general no mute */
+
+
+
+/* Begin code */
+
+static int tda9875_write(struct i2c_client *client, int subaddr, int val)
+{
+	unsigned char buffer[2];
+	dprintk("In tda9875_write\n");
+	dprintk("Writing %d 0x%x\n", subaddr, val);
+	buffer[0] = subaddr;
+	buffer[1] = val;
+	if (2 != i2c_master_send(client,buffer,2)) {
+		printk(KERN_WARNING "tda9875: I/O error, trying (write %d 0x%x)\n",
+		       subaddr, val);
+		return -1;
+	}
+	return 0;
+}
+
+#if 0
+static int tda9875_read(struct i2c_client *client)
+{
+	unsigned char buffer;
+	dprintk("In tda9875_read\n");
+	if (1 != i2c_master_recv(client,&buffer,1)) {
+		printk(KERN_WARNING "tda9875: I/O error, trying (read)\n");
+		return -1;
+	}
+	dprintk("Read 0x%02x\n", buffer); 
+	return buffer;
+}
+#endif
+
+static void tda9875_set(struct i2c_client *client)
+{
+	struct tda9875 *tda = client->data;
+	
+	dprintk(KERN_DEBUG "tda9875_set(%04x,%04x,%04x,%04x)\n",tda->lvol,tda->rvol,tda->bass,tda->treble);
+	tda9875_write(client, TDA9875_MVL, tda->lvol / 600 - 84);
+	tda9875_write(client, TDA9875_MVR, tda->rvol / 600 -84);
+	tda9875_write(client, TDA9875_MBA, tda->bass / 2340 -12);
+	tda9875_write(client, TDA9875_MTR, tda->treble / 2621 -12);
+}
+
+static void do_tda9875_init(struct i2c_client *client)
+{
+	struct tda9875 *t = client->data;
+	dprintk("In tda9875_init\n"); 
+	tda9875_write(client, TDA9875_CFG, 0xd0 ); /*reg de config 0 (reset)*/
+    	tda9875_write(client, TDA9875_MSR, 0x03 );    /* Monitor 0b00000XXX*/
+	tda9875_write(client, TDA9875_C1MSB, 0x00 );  /*Car1(FM) MSB XMHz*/
+	tda9875_write(client, TDA9875_C1MIB, 0x00 );  /*Car1(FM) MIB XMHz*/
+	tda9875_write(client, TDA9875_C1LSB, 0x00 );  /*Car1(FM) LSB XMHz*/
+	tda9875_write(client, TDA9875_C2MSB, 0x00 );  /*Car2(NICAM) MSB XMHz*/
+	tda9875_write(client, TDA9875_C2MIB, 0x00 );  /*Car2(NICAM) MIB XMHz*/
+	tda9875_write(client, TDA9875_C2LSB, 0x00 );  /*Car2(NICAM) LSB XMHz*/
+	tda9875_write(client, TDA9875_DCR, 0x00 );    /*Demod config 0x00*/
+	tda9875_write(client, TDA9875_DEEM, 0x44 );   /*DE-Emph 0b0100 0100*/
+	tda9875_write(client, TDA9875_FMAT, 0x00 );   /*FM Matrix reg 0x00*/
+	tda9875_write(client, TDA9875_SC1, 0x00 );    /* SCART 1 (SC1)*/
+	tda9875_write(client, TDA9875_SC2, 0x01 );    /* SCART 2 (sc2)*/
+        
+	tda9875_write(client, TDA9875_CH1V, 0x10 );  /* Chanel volume 1 mute*/
+	tda9875_write(client, TDA9875_CH2V, 0x10 );  /* Chanel volume 2 mute */
+	tda9875_write(client, TDA9875_DACOS, 0x02 ); /* sig DAC i/o(in:nicam)*/
+	tda9875_write(client, TDA9875_ADCIS, 0x6f ); /* sig ADC input(in:mono)*/
+	tda9875_write(client, TDA9875_LOSR, 0x00 );  /* line out (in:mono)*/
+ 	tda9875_write(client, TDA9875_AER, 0x00 );   /*06 Effect (AVL+PSEUDO) */
+	tda9875_write(client, TDA9875_MCS, 0x44 );   /* Main ch select (DAC) */
+	tda9875_write(client, TDA9875_MVL, 0x03 );   /* Vol Main left 10dB */
+	tda9875_write(client, TDA9875_MVR, 0x03 );   /* Vol Main right 10dB*/
+	tda9875_write(client, TDA9875_MBA, 0x00 );   /* Main Bass Main 0dB*/
+	tda9875_write(client, TDA9875_MTR, 0x00 );   /* Main Treble Main 0dB*/
+	tda9875_write(client, TDA9875_ACS, 0x44 );   /* Aux chan select (dac)*/	
+	tda9875_write(client, TDA9875_AVL, 0x00 );   /* Vol Aux left 0dB*/
+	tda9875_write(client, TDA9875_AVR, 0x00 );   /* Vol Aux right 0dB*/
+	tda9875_write(client, TDA9875_ABA, 0x00 );   /* Aux Bass Main 0dB*/
+	tda9875_write(client, TDA9875_ATR, 0x00 );   /* Aux Aigus Main 0dB*/
+	
+	tda9875_write(client, TDA9875_MUT, 0xcc );   /* General mute  */
+        
+	t->mode=AUDIO_MUTE;
+	t->lvol=t->rvol =51000;  	/* 0dB */
+	t->bass=30420; 		/* 0dB */
+	t->treble=34073;  		/* 0dB */
+	tda9875_set(client);
+
+}
+
+
+/* *********************** *
+ * i2c interface functions *
+ * *********************** */
+
+static int tda9875_attach(struct i2c_adapter *adap, int addr,
+			  unsigned short flags, int kind)
+{
+	struct tda9875 *t;
+	struct i2c_client *client;
+	dprintk("In tda9875_attach\n");
+	client = kmalloc(sizeof *client,GFP_KERNEL);
+	if (!client)
+		return -ENOMEM;		
+        memcpy(client,&client_template,sizeof(struct i2c_client));
+        client->adapter = adap;
+        client->addr = addr;
+	
+	client->data = t = kmalloc(sizeof *t,GFP_KERNEL);
+	if (!t)
+		return -ENOMEM;
+	memset(t,0,sizeof *t);
+	do_tda9875_init(client);
+	MOD_INC_USE_COUNT;
+	strcpy(client->name,"TDA9875");
+	printk(KERN_INFO "tda9875: init\n");
+
+	i2c_attach_client(client);
+	return 0;
+}
+
+static int tda9875_probe(struct i2c_adapter *adap)
+{
+	if (adap->id == (I2C_ALGO_BIT | I2C_HW_B_BT848))
+		return i2c_probe(adap, &addr_data, tda9875_attach);
+	return 0;
+}
+
+static int tda9875_detach(struct i2c_client *client)
+{
+	struct tda9875 *t  = client->data;
+
+	do_tda9875_init(client);
+	i2c_detach_client(client);
+	
+	kfree(t);
+	kfree(client);
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+static int tda9875_command(struct i2c_client *client,
+				unsigned int cmd, void *arg)
+{
+	struct tda9875 *t = client->data;
+
+	dprintk("In tda9875_command...\n"); 
+
+	switch (cmd) {	
+        /* --- v4l ioctls --- */
+	/* take care: bttv does userspace copying, we'll get a
+	   kernel pointer here... */
+	case VIDIOCGAUDIO:
+	{
+		struct video_audio *va = arg;
+		int left,right;
+
+		dprintk("VIDIOCGAUDIO\n");
+
+		va->flags |= VIDEO_AUDIO_VOLUME |
+			VIDEO_AUDIO_BASS |
+			VIDEO_AUDIO_TREBLE;
+
+		/* min is -84 max is 24 */
+		left = (t->lvol+85)*600;
+		right = (t->rvol+85)*600;
+		va->volume=MAX(left,right);
+		va->balance=(32768*MIN(left,right))/
+			(va->volume ? va->volume : 1);
+		va->balance=(left<right)?
+			(65535-va->balance) : va->balance;
+		va->bass = (t->bass+13)*2340;     /* min -12 max +15 */
+		va->treble = (t->treble+13)*2621;/* min -12 max +12 */
+
+		va->mode |= VIDEO_SOUND_MONO;
+
+
+		break; /* VIDIOCGAUDIO case */
+	}
+
+	case VIDIOCSAUDIO:
+	{
+		struct video_audio *va = arg;
+		int left,right;
+
+		dprintk("VIDEOCSAUDIO...\n"); 
+		left = (MIN(65536 - va->balance,32768) *
+			va->volume) / 32768;
+		right = (MIN(va->balance,32768) *
+			 va->volume) / 32768;
+		t->lvol = left/600-84;
+		t->rvol = right/600-84;
+		t->bass = va->bass/2340-12;
+		t->treble = va->treble/2621-12;
+		tda9875_set(client);
+
+		break;
+
+	} /* end of VIDEOCSAUDIO case */
+
+	default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
+
+		/* nothing */
+		dprintk("Default\n");
+
+	} /* end of (cmd) switch */
+
+	return 0;
+}
+
+
+static struct i2c_driver driver = {
+        "i2c tda9875 driver",
+        I2C_DRIVERID_TDA9875, /* Get new one for TDA9875 */
+        I2C_DF_NOTIFY,
+	tda9875_probe,
+        tda9875_detach,
+        tda9875_command,
+};
+
+static struct i2c_client client_template =
+{
+        "(unset)",		/* name */
+        -1,
+        0,
+        0,
+        NULL,
+        &driver
+};
+
+#ifdef MODULE
+int init_module(void)
+#else
+int tda9875_init(void)
+#endif
+{
+	i2c_add_driver(&driver);
+	return 0;
+}
+
+#ifdef MODULE
+void cleanup_module(void)
+{
+	i2c_del_driver(&driver);
+}
+#endif
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */
+