patch-2.4.0-test7 linux/drivers/char/tea6300.c

• Lines: 345
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.4.0-test6/linux/drivers/char/tea6300.c
• Orig date: Tue Jan 11 22:31:40 2000

diff -u --recursive --new-file v2.4.0-test6/linux/drivers/char/tea6300.c linux/drivers/char/tea6300.c
@@ -1,344 +0,0 @@
-/*
- * for the TEA6300 chip (only found on Gateway STB TV/FM cards tho the best
- * of my knowledge)
- * WARNING: THIS DRIVER WILL LOAD WITHOUT COMPLAINTS EVEN IF THE WRONG
- * CHIP (i.e., an MSP3400) IS ON I2C ADDRESS 0x80 (it relies on i2c to
- * make sure that there is a device acknowledging that address).  This
- * is a potential problem because the MSP3400 is very popular and does
- * use this address!  You have been warned!
- *
- * Copyright (c) 1998 Greg Alexander <galexand@acm.org>
- * This code is placed under the terms of the GNU General Public License
- * Code liberally copied from msp3400.c, which is by Gerd Knorr
- *
- * All of this should work, though it would be nice to eventually support
- * balance (different left,right values) and, if someone ever finds a card
- * with the support (or if you're careful with a soldering iron), fade
- * (front/back).
- */
-
-#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"
-
-
-/* Addresses to scan */
-#define I2C_TEA6300	0x80
-static unsigned short normal_i2c[] = {
-    I2C_TEA6300 >> 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
-};
-
-
-MODULE_PARM(debug,"i");
-static int debug = 0; /* insmod parameter */
-
-#define dprintk  if (debug) printk
-
-
-struct tea6300 {
-	int mode;		/* set to AUDIO_{OFF,TUNER,RADIO,EXTERN} */
-	int stereo;
-	__u16 left,right;
-	__u16 bass,treble;
-};
-
-static struct i2c_driver driver;
-static struct i2c_client client_template;
-
-#define TEA6300_VL         0x00  /* volume left */
-#define TEA6300_VR         0x01  /* volume right */
-#define TEA6300_BA         0x02  /* bass */
-#define TEA6300_TR         0x03  /* treble */
-#define TEA6300_FA         0x04  /* fader control */
-#define TEA6300_S          0x05  /* switch register */
-                                 /* values for those registers: */
-#define TEA6300_S_SA       0x01  /* stereo A input */
-#define TEA6300_S_SB       0x02  /* stereo B */
-#define TEA6300_S_SC       0x04  /* stereo C */
-#define TEA6300_S_GMU      0x80  /* general mute */
-
-
-/* ******************************** *
- * functions for talking to TEA6300 *
- * ******************************** */
-
-static int tea6300_write(struct i2c_client *client, int addr, int val)
-{
-	unsigned char buffer[2];
-
-	buffer[0] = addr;
-	buffer[1] = val;
-	if (2 != i2c_master_send(client,buffer,2)) {
-		printk(KERN_WARNING "tea6300: I/O error, trying (write %d 0x%x)\n",
-		       addr, val);
-		return -1;
-	}
-	return 0;
-}
-
-static void tea6300_set(struct i2c_client *client)
-{
-	struct tea6300 *tea = client->data;
-
-	/* mode is ignored today */
-	dprintk(KERN_DEBUG "tea6300_set(%04x,%04x,%04x,%04x)\n",tea->left>>10,tea->right>>10,tea->bass>>12,tea->treble>>12);
-	tea6300_write(client, TEA6300_VL, tea->left>>10  );
-	tea6300_write(client, TEA6300_VR, tea->right>>10 );
-	tea6300_write(client, TEA6300_BA, tea->bass>>12  );
-	tea6300_write(client, TEA6300_TR, tea->treble>>12);
-}
-
-static void do_tea6300_init(struct i2c_client *client)
-{
-	struct tea6300 *tea = client->data;
-	
-	tea->left=tea->right =49152;  /* -10dB (loud enough, but not beyond
-	                                 normal line levels - so as to avoid
-	                                 clipping */
-	tea->bass=tea->treble=28672;  /* 0dB */
-	tea->mode=AUDIO_OFF;
-	tea->stereo=1;
-	/* left=right=0x27<<10, bass=treble=0x07<<12 */
-	tea6300_write(client, TEA6300_FA, 0x3f         ); /* fader off */
-	tea6300_write(client, TEA6300_S , TEA6300_S_GMU); /* mute */
-	tea6300_set(client);
-}
-
-static void tea6300_audio(struct i2c_client *client, int mode)
-{
-	struct tea6300 *tea = client->data;
-	
-	/* valid for AUDIO_TUNER, RADIO, EXTERN, OFF */
-	dprintk(KERN_DEBUG "tea6300_audio:%d (T,R,E,I,O)\n",mode);
-	tea->mode=mode;
-	if (mode==AUDIO_OFF) {	/* just mute it */
-		tea6300_write(client, TEA6300_S, TEA6300_S_GMU);
-		return;
-	}
-	switch(mode) {
-		case AUDIO_TUNER:
-			tea6300_write(client, TEA6300_S, TEA6300_S_SA);
-			break;
-		case AUDIO_RADIO:
-			tea6300_write(client, TEA6300_S, TEA6300_S_SB);
-			break;
-		case AUDIO_EXTERN:
-			tea6300_write(client, TEA6300_S, TEA6300_S_SC);
-			break;
-	}
-}
-
-
-/* *********************** *
- * i2c interface functions *
- * *********************** */
-
-static int tea6300_attach(struct i2c_adapter *adap, int addr,
-			  unsigned short flags, int kind)
-{
-	struct tea6300 *tea;
-	struct i2c_client *client;
-
-	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 = tea = kmalloc(sizeof *tea,GFP_KERNEL);
-	if (!tea)
-		return -ENOMEM;
-	memset(tea,0,sizeof *tea);
-	do_tea6300_init(client);
-
-	MOD_INC_USE_COUNT;
-	strcpy(client->name,"TEA6300T");
-	printk(KERN_INFO "tea6300: initialized\n");
-
-	i2c_attach_client(client);
-	return 0;
-}
-
-static int tea6300_probe(struct i2c_adapter *adap)
-{	
-	if (adap->id == (I2C_ALGO_BIT | I2C_HW_B_BT848))
-		return i2c_probe(adap, &addr_data, tea6300_attach);
-	return 0;
-}
-
-static int tea6300_detach(struct i2c_client *client)
-{
-	struct tea6300 *tea  = client->data;
-    
-	do_tea6300_init(client);
-	i2c_detach_client(client);
-
-	kfree(tea);
-	kfree(client);
-	MOD_DEC_USE_COUNT;
-	return 0;
-}
-
-static int
-tea6300_command(struct i2c_client *client, unsigned int cmd, void *arg)
-{
-	struct tea6300 *tea = client->data;
-        __u16 *sarg = arg;
-
-	switch (cmd) {
-	case AUDC_SET_RADIO:
-		tea6300_audio(client,AUDIO_RADIO);
-		break;
-	case AUDC_SET_INPUT:
-		tea6300_audio(client,*sarg);
-		break;
-
-	/* --- v4l ioctls --- */
-	/* take care: bttv does userspace copying, we'll get a
-	   kernel pointer here... */
-	case VIDIOCGAUDIO:
-	{
-		struct video_audio *va = arg;
-
-		va->flags |= VIDEO_AUDIO_VOLUME |
-			VIDEO_AUDIO_BASS |
-			VIDEO_AUDIO_TREBLE;
-		va->volume=MAX(tea->left,tea->right);
-		va->balance=(32768*MIN(tea->left,tea->right))/
-			(va->volume ? va->volume : 1);
-		va->balance=(tea->left<tea->right)?
-			(65535-va->balance) : va->balance;
-		va->bass = tea->bass;
-		va->treble = tea->treble;
-		break;
-	}
-	case VIDIOCSAUDIO:
-	{
-		struct video_audio *va = arg;
-
-		tea->left = (MIN(65536 - va->balance,32768) *
-			     va->volume) / 32768;
-		tea->right = (MIN(va->balance,32768) *
-			      va->volume) / 32768;
-		tea->bass = va->bass;
-		tea->treble = va->treble;
-		tea6300_set(client);
-		break;
-	}
-#if 0
-	/* --- old, obsolete interface --- */
-	case AUDC_GET_VOLUME_LEFT:
-		*sarg = tea->left;
-		break;
-	case AUDC_GET_VOLUME_RIGHT:
-		*sarg = tea->right;
-		break;
-	case AUDC_SET_VOLUME_LEFT:
-		tea->left = *sarg;
-		tea6300_set(client);
-		break;
-	case AUDC_SET_VOLUME_RIGHT:
-		tea->right = *sarg;
-		tea6300_set(client);
-		break;
-
-	case AUDC_GET_BASS:
-		*sarg = tea->bass;
-		break;
-	case AUDC_SET_BASS:
-		tea->bass = *sarg;
-		tea6300_set(client);
-		break;
-
-	case AUDC_GET_TREBLE:
-		*sarg = tea->treble;
-		break;
-	case AUDC_SET_TREBLE:
-		tea->treble = *sarg;
-		tea6300_set(client);
-		break;
-
-	case AUDC_GET_STEREO:
-		*sarg = tea->stereo?VIDEO_SOUND_STEREO:VIDEO_SOUND_MONO;
-		break;
-	case AUDC_SET_STEREO:
-		tea->stereo=(*sarg==VIDEO_SOUND_MONO)?0:1;
-		/* TODO: make this write to the TDA9850? */
-		break;
-
-/*	case AUDC_SWITCH_MUTE:	someday, maybe -- not a lot of point to
-	case AUDC_NEWCHANNEL:	it and it would require preserving state
-	case AUDC_GET_DC:	huh?? (not used by bttv.c)
-*/
-#endif
-	default:
-		/* nothing */
-	}
-	return 0;
-}
-
-static struct i2c_driver driver = {
-        "i2c tea6300 driver",
-        I2C_DRIVERID_TEA6300,
-        I2C_DF_NOTIFY,
-	tea6300_probe,
-        tea6300_detach,
-        tea6300_command,
-};
-
-static struct i2c_client client_template =
-{
-        "(unset)",		/* name */
-        -1,
-        0,
-        0,
-        NULL,
-        &driver
-};
-
-#ifdef MODULE
-int init_module(void)
-#else
-int tea6300_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:
- */