1 files changed, 556 insertions, 0 deletions

diff --git a/drivers/media/video/tda7432.c b/drivers/media/video/tda7432.c
new file mode 100644
index 000000000000..376a4a439e9b
--- /dev/null
+++ b/drivers/media/video/tda7432.c
@@ -0,0 +1,556 @@
+/*
+ * For the STS-Thompson TDA7432 audio processor chip
+ *
+ * Handles audio functions: volume, balance, tone, loudness
+ * This driver will not complain if used with any
+ * other i2c device with the same address.
+ *
+ * Muting and tone control by Jonathan Isom <jisom@ematic.com>
+ *
+ * Copyright (c) 2000 Eric Sandeen <eric_sandeen@bigfoot.com>
+ * 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
+ *            set to 2 if you'd like to be inundated with debug messages
+ *
+ * loudness - set between 0 and 15 for varying degrees of loudness effect
+ *
+ * maxvol   - set maximium volume to +20db (1), default is 0db(0)
+ *
+ *
+ *  Revision: 0.7 - maxvol module parm to set maximium volume 0db or +20db
+ *                              store if muted so we can return it
+ *                              change balance only if flaged to
+ *  Revision: 0.6 - added tone controls
+ *  Revision: 0.5 - Fixed odd balance problem
+ *  Revision: 0.4 - added muting
+ *  Revision: 0.3 - Fixed silly reversed volume controls.  :)
+ *  Revision: 0.2 - Cleaned up #defines
+ *                      fixed volume control
+ *          Added I2C_DRIVERID_TDA7432
+ *                      added loudness insmod control
+ *  Revision: 0.1 - initial version
+ */
+
+#include <linux/module.h>
+#include <linux/init.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/slab.h>
+#include <linux/videodev.h>
+#include <linux/i2c.h>
+#include <linux/i2c-algo-bit.h>
+
+#include "bttv.h"
+#include <media/audiochip.h>
+#include <media/id.h>
+
+#ifndef VIDEO_AUDIO_BALANCE
+# define VIDEO_AUDIO_BALANCE 32
+#endif
+
+MODULE_AUTHOR("Eric Sandeen <eric_sandeen@bigfoot.com>");
+MODULE_DESCRIPTION("bttv driver for the tda7432 audio processor chip");
+MODULE_LICENSE("GPL");
+
+static int maxvol;
+static int loudness; /* disable loudness by default */
+static int debug;        /* insmod parameter */
+module_param(debug, int, S_IRUGO | S_IWUSR);
+module_param(loudness, int, S_IRUGO);
+MODULE_PARM_DESC(maxvol,"Set maximium volume to +20db (0), default is 0db(1)");
+module_param(maxvol, int, S_IRUGO | S_IWUSR);
+
+
+/* Address to scan (I2C address of this chip) */
+static unsigned short normal_i2c[] = {
+        I2C_TDA7432 >> 1,
+        I2C_CLIENT_END,
+};
+static unsigned short normal_i2c_range[] = { I2C_CLIENT_END, I2C_CLIENT_END };
+I2C_CLIENT_INSMOD;
+
+/* Structure of address and subaddresses for the tda7432 */
+
+struct tda7432 {
+        int addr;
+        int input;
+        int volume;
+        int muted;
+        int bass, treble;
+        int lf, lr, rf, rr;
+        int loud;
+        struct i2c_client c;
+};
+static struct i2c_driver driver;
+static struct i2c_client client_template;
+
+#define dprintk  if (debug) printk
+#define d2printk if (debug > 1) printk
+
+/* The TDA7432 is made by STS-Thompson
+ * http://www.st.com
+ * http://us.st.com/stonline/books/pdf/docs/4056.pdf
+ *
+ * TDA7432: I2C-bus controlled basic audio processor
+ *
+ * The TDA7432 controls basic audio functions like volume, balance,
+ * and tone control (including loudness).  It also has four channel
+ * output (for front and rear).  Since most vidcap cards probably
+ * don't have 4 channel output, this driver will set front & rear
+ * together (no independent control).
+ */
+
+                /* Subaddresses for TDA7432 */
+
+#define TDA7432_IN      0x00 /* Input select                 */
+#define TDA7432_VL      0x01 /* Volume                       */
+#define TDA7432_TN      0x02 /* Bass, Treble (Tone)          */
+#define TDA7432_LF      0x03 /* Attenuation LF (Left Front)  */
+#define TDA7432_LR      0x04 /* Attenuation LR (Left Rear)   */
+#define TDA7432_RF      0x05 /* Attenuation RF (Right Front) */
+#define TDA7432_RR      0x06 /* Attenuation RR (Right Rear)  */
+#define TDA7432_LD      0x07 /* Loudness                     */
+
+
+                /* Masks for bits in TDA7432 subaddresses */
+
+/* Many of these not used - just for documentation */
+
+/* Subaddress 0x00 - Input selection and bass control */
+
+/* Bits 0,1,2 control input:
+ * 0x00 - Stereo input
+ * 0x02 - Mono input
+ * 0x03 - Mute  (Using Attenuators Plays better with modules)
+ * Mono probably isn't used - I'm guessing only the stereo
+ * input is connected on most cards, so we'll set it to stereo.
+ *
+ * Bit 3 controls bass cut: 0/1 is non-symmetric/symmetric bass cut
+ * Bit 4 controls bass range: 0/1 is extended/standard bass range
+ *
+ * Highest 3 bits not used
+ */
+
+#define TDA7432_STEREO_IN       0
+#define TDA7432_MONO_IN         2       /* Probably won't be used */
+#define TDA7432_BASS_SYM        1 << 3
+#define TDA7432_BASS_NORM       1 << 4
+
+/* Subaddress 0x01 - Volume */
+
+/* Lower 7 bits control volume from -79dB to +32dB in 1dB steps
+ * Recommended maximum is +20 dB
+ *
+ * +32dB: 0x00
+ * +20dB: 0x0c
+ *   0dB: 0x20
+ * -79dB: 0x6f
+ *
+ * MSB (bit 7) controls loudness: 1/0 is loudness on/off
+ */
+
+#define TDA7432_VOL_0DB         0x20
+#define TDA7432_LD_ON           1 << 7
+
+
+/* Subaddress 0x02 - Tone control */
+
+/* Bits 0,1,2 control absolute treble gain from 0dB to 14dB
+ * 0x0 is 14dB, 0x7 is 0dB
+ *
+ * Bit 3 controls treble attenuation/gain (sign)
+ * 1 = gain (+)
+ * 0 = attenuation (-)
+ *
+ * Bits 4,5,6 control absolute bass gain from 0dB to 14dB
+ * (This is only true for normal base range, set in 0x00)
+ * 0x0 << 4 is 14dB, 0x7 is 0dB
+ *
+ * Bit 7 controls bass attenuation/gain (sign)
+ * 1 << 7 = gain (+)
+ * 0 << 7 = attenuation (-)
+ *
+ * Example:
+ * 1 1 0 1 0 1 0 1 is +4dB bass, -4dB treble
+ */
+
+#define TDA7432_TREBLE_0DB              0xf
+#define TDA7432_TREBLE                  7
+#define TDA7432_TREBLE_GAIN             1 << 3
+#define TDA7432_BASS_0DB                0xf
+#define TDA7432_BASS                    7 << 4
+#define TDA7432_BASS_GAIN               1 << 7
+
+
+/* Subaddress 0x03 - Left  Front attenuation */
+/* Subaddress 0x04 - Left  Rear  attenuation */
+/* Subaddress 0x05 - Right Front attenuation */
+/* Subaddress 0x06 - Right Rear  attenuation */
+
+/* Bits 0,1,2,3,4 control attenuation from 0dB to -37.5dB
+ * in 1.5dB steps.
+ *
+ * 0x00 is     0dB
+ * 0x1f is -37.5dB
+ *
+ * Bit 5 mutes that channel when set (1 = mute, 0 = unmute)
+ * We'll use the mute on the input, though (above)
+ * Bits 6,7 unused
+ */
+
+#define TDA7432_ATTEN_0DB       0x00
+#define TDA7432_MUTE        0x1 << 5
+
+
+/* Subaddress 0x07 - Loudness Control */
+
+/* Bits 0,1,2,3 control loudness from 0dB to -15dB in 1dB steps
+ * when bit 4 is NOT set
+ *
+ * 0x0 is   0dB
+ * 0xf is -15dB
+ *
+ * If bit 4 is set, then there is a flat attenuation according to
+ * the lower 4 bits, as above.
+ *
+ * Bits 5,6,7 unused
+ */
+
+
+
+/* Begin code */
+
+static int tda7432_write(struct i2c_client *client, int subaddr, int val)
+{
+        unsigned char buffer[2];
+        d2printk("tda7432: In tda7432_write\n");
+        dprintk("tda7432: Writing %d 0x%x\n", subaddr, val);
+        buffer[0] = subaddr;
+        buffer[1] = val;
+        if (2 != i2c_master_send(client,buffer,2)) {
+                printk(KERN_WARNING "tda7432: I/O error, trying (write %d 0x%x)\n",
+                       subaddr, val);
+                return -1;
+        }
+        return 0;
+}
+
+/* I don't think we ever actually _read_ the chip... */
+#if 0
+static int tda7432_read(struct i2c_client *client)
+{
+        unsigned char buffer;
+        d2printk("tda7432: In tda7432_read\n");
+        if (1 != i2c_master_recv(client,&buffer,1)) {
+                printk(KERN_WARNING "tda7432: I/O error, trying (read)\n");
+                return -1;
+        }
+        dprintk("tda7432: Read 0x%02x\n", buffer);
+        return buffer;
+}
+#endif
+
+static int tda7432_set(struct i2c_client *client)
+{
+        struct tda7432 *t = i2c_get_clientdata(client);
+        unsigned char buf[16];
+        d2printk("tda7432: In tda7432_set\n");
+
+        dprintk(KERN_INFO
+                "tda7432: 7432_set(0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x)\n",
+                t->input,t->volume,t->bass,t->treble,t->lf,t->lr,t->rf,t->rr,t->loud);
+        buf[0]  = TDA7432_IN;
+        buf[1]  = t->input;
+        buf[2]  = t->volume;
+        buf[3]  = t->bass;
+        buf[4]  = t->treble;
+        buf[5]  = t->lf;
+        buf[6]  = t->lr;
+        buf[7]  = t->rf;
+        buf[8]  = t->rr;
+        buf[9]  = t->loud;
+        if (10 != i2c_master_send(client,buf,10)) {
+                printk(KERN_WARNING "tda7432: I/O error, trying tda7432_set\n");
+                return -1;
+        }
+
+        return 0;
+}
+
+static void do_tda7432_init(struct i2c_client *client)
+{
+        struct tda7432 *t = i2c_get_clientdata(client);
+        d2printk("tda7432: In tda7432_init\n");
+
+        t->input  = TDA7432_STEREO_IN |  /* Main (stereo) input   */
+                    TDA7432_BASS_SYM  |  /* Symmetric bass cut    */
+                    TDA7432_BASS_NORM;   /* Normal bass range     */
+        t->volume =  0x3b ;                              /* -27dB Volume            */
+        if (loudness)                    /* Turn loudness on?     */
+                t->volume |= TDA7432_LD_ON;
+        t->muted    = VIDEO_AUDIO_MUTE;
+        t->treble   = TDA7432_TREBLE_0DB; /* 0dB Treble            */
+        t->bass         = TDA7432_BASS_0DB;      /* 0dB Bass              */
+        t->lf     = TDA7432_ATTEN_0DB;   /* 0dB attenuation       */
+        t->lr     = TDA7432_ATTEN_0DB;   /* 0dB attenuation       */
+        t->rf     = TDA7432_ATTEN_0DB;   /* 0dB attenuation       */
+        t->rr     = TDA7432_ATTEN_0DB;   /* 0dB attenuation       */
+        t->loud   = loudness;            /* insmod parameter      */
+
+        tda7432_set(client);
+}
+
+/* *********************** *
+ * i2c interface functions *
+ * *********************** */
+
+static int tda7432_attach(struct i2c_adapter *adap, int addr, int kind)
+{
+        struct tda7432 *t;
+        struct i2c_client *client;
+        d2printk("tda7432: In tda7432_attach\n");
+
+        t = kmalloc(sizeof *t,GFP_KERNEL);
+        if (!t)
+                return -ENOMEM;
+        memset(t,0,sizeof *t);
+
+        client = &t->c;
+        memcpy(client,&client_template,sizeof(struct i2c_client));
+        client->adapter = adap;
+        client->addr = addr;
+        i2c_set_clientdata(client, t);
+
+        do_tda7432_init(client);
+        printk(KERN_INFO "tda7432: init\n");
+
+        i2c_attach_client(client);
+        return 0;
+}
+
+static int tda7432_probe(struct i2c_adapter *adap)
+{
+#ifdef I2C_CLASS_TV_ANALOG
+        if (adap->class & I2C_CLASS_TV_ANALOG)
+                return i2c_probe(adap, &addr_data, tda7432_attach);
+#else
+        if (adap->id == (I2C_ALGO_BIT | I2C_HW_B_BT848))
+                return i2c_probe(adap, &addr_data, tda7432_attach);
+#endif
+        return 0;
+}
+
+static int tda7432_detach(struct i2c_client *client)
+{
+        struct tda7432 *t  = i2c_get_clientdata(client);
+
+        do_tda7432_init(client);
+        i2c_detach_client(client);
+
+        kfree(t);
+        return 0;
+}
+
+static int tda7432_command(struct i2c_client *client,
+                           unsigned int cmd, void *arg)
+{
+        struct tda7432 *t = i2c_get_clientdata(client);
+        d2printk("tda7432: In tda7432_command\n");
+
+        switch (cmd) {
+        /* --- v4l ioctls --- */
+        /* take care: bttv does userspace copying, we'll get a
+           kernel pointer here... */
+
+        /* Query card - scale from TDA7432 settings to V4L settings */
+        case VIDIOCGAUDIO:
+        {
+                struct video_audio *va = arg;
+                dprintk("tda7432: VIDIOCGAUDIO\n");
+
+                va->flags |= VIDEO_AUDIO_VOLUME |
+                        VIDEO_AUDIO_BASS |
+                        VIDEO_AUDIO_TREBLE |
+                        VIDEO_AUDIO_MUTABLE;
+                if (t->muted)
+                        va->flags |= VIDEO_AUDIO_MUTE;
+                va->mode |= VIDEO_SOUND_STEREO;
+                /* Master volume control
+                 * V4L volume is min 0, max 65535
+                 * TDA7432 Volume:
+                 * Min (-79dB) is 0x6f
+                 * Max (+20dB) is 0x07 (630)
+                 * Max (0dB) is 0x20 (829)
+                 * (Mask out bit 7 of vol - it's for the loudness setting)
+                 */
+                if (!maxvol){  /* max +20db */
+                        va->volume = ( 0x6f - (t->volume & 0x7F) ) * 630;
+                } else {       /* max 0db   */
+                        va->volume = ( 0x6f - (t->volume & 0x7F) ) * 829;
+                }
+
+                /* Balance depends on L,R attenuation
+                 * V4L balance is 0 to 65535, middle is 32768
+                 * TDA7432 attenuation: min (0dB) is 0, max (-37.5dB) is 0x1f
+                 * to scale up to V4L numbers, mult by 1057
+                 * attenuation exists for lf, lr, rf, rr
+                 * we use only lf and rf (front channels)
+                 */
+
+                if ( (t->lf) < (t->rf) )
+                        /* right is attenuated, balance shifted left */
+                        va->balance = (32768 - 1057*(t->rf));
+                else
+                        /* left is attenuated, balance shifted right */
+                        va->balance = (32768 + 1057*(t->lf));
+
+                /* Bass/treble 4 bits each */
+                va->bass=t->bass;
+                if(va->bass >= 0x8)
+                        va->bass = ~(va->bass - 0x8) & 0xf;
+                va->bass = (va->bass << 12)+(va->bass << 8)+(va->bass << 4)+(va->bass);
+                va->treble=t->treble;
+                if(va->treble >= 0x8)
+                        va->treble = ~(va->treble - 0x8) & 0xf;
+                va->treble = (va->treble << 12)+(va->treble << 8)+(va->treble << 4)+(va->treble);
+
+                break; /* VIDIOCGAUDIO case */
+        }
+
+        /* Set card - scale from V4L settings to TDA7432 settings */
+        case VIDIOCSAUDIO:
+        {
+                struct video_audio *va = arg;
+                dprintk("tda7432: VIDEOCSAUDIO\n");
+
+                if(va->flags & VIDEO_AUDIO_VOLUME){
+                        if(!maxvol){ /* max +20db */
+                                t->volume = 0x6f - ((va->volume)/630);
+                        } else {    /* max 0db   */
+                                t->volume = 0x6f - ((va->volume)/829);
+                        }
+
+                if (loudness)           /* Turn on the loudness bit */
+                        t->volume |= TDA7432_LD_ON;
+
+                        tda7432_write(client,TDA7432_VL, t->volume);
+                }
+
+                if(va->flags & VIDEO_AUDIO_BASS)
+                {
+                        t->bass = va->bass >> 12;
+                        if(t->bass>= 0x8)
+                                        t->bass = (~t->bass & 0xf) + 0x8 ;
+                }
+                if(va->flags & VIDEO_AUDIO_TREBLE)
+                {
+                        t->treble= va->treble >> 12;
+                        if(t->treble>= 0x8)
+                                        t->treble = (~t->treble & 0xf) + 0x8 ;
+                }
+                if(va->flags & (VIDEO_AUDIO_TREBLE| VIDEO_AUDIO_BASS))
+                        tda7432_write(client,TDA7432_TN, 0x10 | (t->bass << 4) | t->treble );
+
+                if(va->flags & VIDEO_AUDIO_BALANCE)     {
+                if (va->balance < 32768)
+                {
+                        /* shifted to left, attenuate right */
+                        t->rr = (32768 - va->balance)/1057;
+                        t->rf = t->rr;
+                        t->lr = TDA7432_ATTEN_0DB;
+                        t->lf = TDA7432_ATTEN_0DB;
+                }
+                else if(va->balance > 32769)
+                {
+                        /* shifted to right, attenuate left */
+                        t->lf = (va->balance - 32768)/1057;
+                        t->lr = t->lf;
+                        t->rr = TDA7432_ATTEN_0DB;
+                        t->rf = TDA7432_ATTEN_0DB;
+                }
+                else
+                {
+                        /* centered */
+                        t->rr = TDA7432_ATTEN_0DB;
+                        t->rf = TDA7432_ATTEN_0DB;
+                        t->lf = TDA7432_ATTEN_0DB;
+                        t->lr = TDA7432_ATTEN_0DB;
+                }
+                }
+
+                t->muted=(va->flags & VIDEO_AUDIO_MUTE);
+                if (t->muted)
+                {
+                        /* Mute & update balance*/
+                        tda7432_write(client,TDA7432_LF, t->lf | TDA7432_MUTE);
+                        tda7432_write(client,TDA7432_LR, t->lr | TDA7432_MUTE);
+                        tda7432_write(client,TDA7432_RF, t->rf | TDA7432_MUTE);
+                        tda7432_write(client,TDA7432_RR, t->rr | TDA7432_MUTE);
+                } else {
+                        tda7432_write(client,TDA7432_LF, t->lf);
+                        tda7432_write(client,TDA7432_LR, t->lr);
+                        tda7432_write(client,TDA7432_RF, t->rf);
+                        tda7432_write(client,TDA7432_RR, t->rr);
+                }
+
+                break;
+
+        } /* end of VIDEOCSAUDIO case */
+
+        default: /* Not VIDEOCGAUDIO or VIDEOCSAUDIO */
+
+                /* nothing */
+                d2printk("tda7432: Default\n");
+
+        } /* end of (cmd) switch */
+
+        return 0;
+}
+
+static struct i2c_driver driver = {
+        .owner           = THIS_MODULE,
+        .name            = "i2c tda7432 driver",
+        .id              = I2C_DRIVERID_TDA7432,
+        .flags           = I2C_DF_NOTIFY,
+        .attach_adapter  = tda7432_probe,
+        .detach_client   = tda7432_detach,
+        .command         = tda7432_command,
+};
+
+static struct i2c_client client_template =
+{
+        I2C_DEVNAME("tda7432"),
+        .driver     = &driver,
+};
+
+static int __init tda7432_init(void)
+{
+        if ( (loudness < 0) || (loudness > 15) ) {
+                printk(KERN_ERR "tda7432: loudness parameter must be between 0 and 15\n");
+                return -EINVAL;
+        }
+
+        return i2c_add_driver(&driver);
+}
+
+static void __exit tda7432_fini(void)
+{
+        i2c_del_driver(&driver);
+}
+
+module_init(tda7432_init);
+module_exit(tda7432_fini);
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */