patch-2.4.0-test11 linux/drivers/media/video/tea6420.c
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- Lines: 274
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.4.0-test10/linux/drivers/media/video/tea6420.c
- Orig date:
Mon Aug 21 09:18:19 2000
diff -u --recursive --new-file v2.4.0-test10/linux/drivers/media/video/tea6420.c linux/drivers/media/video/tea6420.c
@@ -1,273 +0,0 @@
-/*
- * for the TEA6420 chip (only found on 3DFX (STB) TV/FM cards to the best
- * of my knowledge)
- * Copyright (C) 2000 Dave Stuart <justdave@ynn.com>
- * This code is placed under the terms of the GNU General Public License
- * Code liberally copied from tea6300 by . . .
- *
- * 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
- *
- * Changes:
- * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 08/14/2000
- * - resource allocation fixes in tea6300_attach
- */
-
-#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_TEA6420 0x98
-static unsigned short normal_i2c[] = {
- I2C_TEA6420 >> 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 tea6420 {
- int mode; /* set to AUDIO_{OFF,TUNER,RADIO,EXTERN} */
- int stereo;
-};
-
-static struct i2c_driver driver;
-static struct i2c_client client_template;
-
-#define TEA6420_S_SA 0x00 /* stereo A input */
-#define TEA6420_S_SB 0x01 /* stereo B */
-#define TEA6420_S_SC 0x02 /* stereo C */
-#define TEA6420_S_SD 0x03 /* stereo D */
-#define TEA6420_S_SE 0x04 /* stereo E */
-#define TEA6420_S_GMU 0x05 /* general mute */
-
-
-/* ******************************** *
- * functions for talking to TEA6420 *
- * ******************************** */
-
-static int tea6420_write(struct i2c_client *client, int val)
-{
- unsigned char buffer[2];
- int result;
-
-/* buffer[0] = addr; */
- buffer[0] = val;
- result = i2c_master_send(client,buffer,1);
- if (1 != result) {
- printk(KERN_WARNING "tea6420: I/O error, trying (write
-0x%x) result = %d\n", val, result);
- return -1;
- }
- return 0;
-}
-
-
-static void do_tea6420_init(struct i2c_client *client)
-{
- struct tea6420 *tea = client->data;
-
- tea->mode=AUDIO_OFF;
- tea->stereo=1;
- tea6420_write(client, TEA6420_S_GMU); /* mute */
-}
-
-static void tea6420_audio(struct i2c_client *client, int mode)
-{
- struct tea6420 *tea = client->data;
-
- /* valid for AUDIO_TUNER, RADIO, EXTERN, OFF */
- dprintk(KERN_DEBUG "tea6420_audio:%d (T,R,E,I,O)\n",mode);
- tea->mode=mode;
- if (mode==AUDIO_OFF) { /* just mute it */
- tea6420_write(client, TEA6420_S_GMU);
- return;
- }
- switch(mode) {
- case AUDIO_TUNER:
- tea6420_write(client, TEA6420_S_SA);
- break;
- case AUDIO_RADIO:
- tea6420_write(client, TEA6420_S_SB);
- break;
- case AUDIO_EXTERN:
- tea6420_write(client, TEA6420_S_SC);
- break;
- }
-}
-
-
-/* *********************** *
- * i2c interface functions *
- * *********************** */
-
-static int tea6420_attach(struct i2c_adapter *adap, int addr,
- unsigned short flags, int kind)
-{
- struct tea6420 *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) {
- kfree(client);
- return -ENOMEM;
- }
- memset(tea,0,sizeof *tea);
- do_tea6420_init(client);
-
- MOD_INC_USE_COUNT;
- strcpy(client->name,"TEA6420");
- printk(KERN_INFO "tea6420: initialized\n");
-
- i2c_attach_client(client);
- return 0;
-}
-
-static int tea6420_probe(struct i2c_adapter *adap)
-{
- if (adap->id == (I2C_ALGO_BIT | I2C_HW_B_BT848))
- return i2c_probe(adap, &addr_data, tea6420_attach);
- return 0;
-}
-
-static int tea6420_detach(struct i2c_client *client)
-{
- struct tea6420 *tea = client->data;
-
- do_tea6420_init(client);
- i2c_detach_client(client);
-
- kfree(tea);
- kfree(client);
- MOD_DEC_USE_COUNT;
- return 0;
-}
-
-static int
-tea6420_command(struct i2c_client *client, unsigned int cmd, void *arg)
-{
- __u16 *sarg = arg;
-
- switch (cmd) {
- case AUDC_SET_RADIO:
- tea6420_audio(client,AUDIO_RADIO);
- break;
- case AUDC_SET_INPUT:
- tea6420_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:
- {
-
-/* 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;
- tea6420_set(client);
-*/ break;
- }
-
-default:
- /* nothing */
- }
- return 0;
-}
-
-static struct i2c_driver driver = {
- "i2c tea6420 driver",
- I2C_DRIVERID_TEA6420,
- I2C_DF_NOTIFY,
- tea6420_probe,
- tea6420_detach,
- tea6420_command,
-};
-
-static struct i2c_client client_template =
-{
- "(unset)", /* name */
- -1,
- 0,
- 0,
- NULL,
- &driver
-};
-
-#ifdef MODULE
-int init_module(void)
-#else
-int tea6420_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:
- */
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