Initial import of modified Linux 2.6.28 tree

Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y

1 files changed, 536 insertions, 0 deletions

diff --git a/drivers/media/video/tda7432.c b/drivers/media/video/tda7432.c
new file mode 100644
index 0000000..4963d42
--- /dev/null
+++ b/drivers/media/video/tda7432.c
@@ -0,0 +1,536 @@
+/*
+ * 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>
+ * Copyright (c) 2006 Mauro Carvalho Chehab <mchehab@infradead.org>
+ * 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/string.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/videodev2.h>
+#include <linux/i2c.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-ioctl.h>
+#include <media/i2c-addr.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_ADDR_TDA7432 >> 1,
+	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;
+
+/* 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];
+	v4l_dbg(2, debug,client,"In tda7432_write\n");
+	v4l_dbg(1, debug,client,"Writing %d 0x%x\n", subaddr, val);
+	buffer[0] = subaddr;
+	buffer[1] = val;
+	if (2 != i2c_master_send(client,buffer,2)) {
+		v4l_err(client,"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... */
+
+static int tda7432_set(struct i2c_client *client)
+{
+	struct tda7432 *t = i2c_get_clientdata(client);
+	unsigned char buf[16];
+	v4l_dbg(2, debug,client,"In tda7432_set\n");
+
+	v4l_dbg(1, debug,client,
+		"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)) {
+		v4l_err(client,"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);
+	v4l_dbg(2, debug,client,"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    = 1;
+	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;
+
+	t = kzalloc(sizeof *t,GFP_KERNEL);
+	if (!t)
+		return -ENOMEM;
+
+	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);
+	i2c_attach_client(client);
+
+	v4l_info(client, "chip found @ 0x%x (%s)\n", addr << 1, adap->name);
+	return 0;
+}
+
+static int tda7432_probe(struct i2c_adapter *adap)
+{
+	if (adap->class & I2C_CLASS_TV_ANALOG)
+		return i2c_probe(adap, &addr_data, tda7432_attach);
+	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_get_ctrl(struct i2c_client *client,
+			    struct v4l2_control *ctrl)
+{
+	struct tda7432 *t = i2c_get_clientdata(client);
+
+	switch (ctrl->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		ctrl->value=t->muted;
+		return 0;
+	case V4L2_CID_AUDIO_VOLUME:
+		if (!maxvol){  /* max +20db */
+			ctrl->value = ( 0x6f - (t->volume & 0x7F) ) * 630;
+		} else {       /* max 0db   */
+			ctrl->value = ( 0x6f - (t->volume & 0x7F) ) * 829;
+		}
+		return 0;
+	case V4L2_CID_AUDIO_BALANCE:
+	{
+		if ( (t->lf) < (t->rf) )
+			/* right is attenuated, balance shifted left */
+			ctrl->value = (32768 - 1057*(t->rf));
+		else
+			/* left is attenuated, balance shifted right */
+			ctrl->value = (32768 + 1057*(t->lf));
+		return 0;
+	}
+	case V4L2_CID_AUDIO_BASS:
+	{
+		/* Bass/treble 4 bits each */
+		int bass=t->bass;
+		if(bass >= 0x8)
+			bass = ~(bass - 0x8) & 0xf;
+		ctrl->value = (bass << 12)+(bass << 8)+(bass << 4)+(bass);
+		return 0;
+	}
+	case V4L2_CID_AUDIO_TREBLE:
+	{
+		int treble=t->treble;
+		if(treble >= 0x8)
+			treble = ~(treble - 0x8) & 0xf;
+		ctrl->value = (treble << 12)+(treble << 8)+(treble << 4)+(treble);
+		return 0;
+	}
+	}
+	return -EINVAL;
+}
+
+static int tda7432_set_ctrl(struct i2c_client *client,
+			    struct v4l2_control *ctrl)
+{
+	struct tda7432 *t = i2c_get_clientdata(client);
+
+	switch (ctrl->id) {
+	case V4L2_CID_AUDIO_MUTE:
+		t->muted=ctrl->value;
+		break;
+	case V4L2_CID_AUDIO_VOLUME:
+		if(!maxvol){ /* max +20db */
+			t->volume = 0x6f - ((ctrl->value)/630);
+		} else {    /* max 0db   */
+			t->volume = 0x6f - ((ctrl->value)/829);
+		}
+		if (loudness)		/* Turn on the loudness bit */
+			t->volume |= TDA7432_LD_ON;
+
+		tda7432_write(client,TDA7432_VL, t->volume);
+		return 0;
+	case V4L2_CID_AUDIO_BALANCE:
+		if (ctrl->value < 32768) {
+			/* shifted to left, attenuate right */
+			t->rr = (32768 - ctrl->value)/1057;
+			t->rf = t->rr;
+			t->lr = TDA7432_ATTEN_0DB;
+			t->lf = TDA7432_ATTEN_0DB;
+		} else if(ctrl->value > 32769) {
+			/* shifted to right, attenuate left */
+			t->lf = (ctrl->value - 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;
+		}
+		break;
+	case V4L2_CID_AUDIO_BASS:
+		t->bass = ctrl->value >> 12;
+		if(t->bass>= 0x8)
+				t->bass = (~t->bass & 0xf) + 0x8 ;
+
+		tda7432_write(client,TDA7432_TN, 0x10 | (t->bass << 4) | t->treble );
+		return 0;
+	case V4L2_CID_AUDIO_TREBLE:
+		t->treble= ctrl->value >> 12;
+		if(t->treble>= 0x8)
+				t->treble = (~t->treble & 0xf) + 0x8 ;
+
+		tda7432_write(client,TDA7432_TN, 0x10 | (t->bass << 4) | t->treble );
+		return 0;
+	default:
+		return -EINVAL;
+	}
+
+	/* Used for both mute and balance changes */
+	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);
+	}
+	return 0;
+}
+
+static int tda7432_command(struct i2c_client *client,
+			   unsigned int cmd, void *arg)
+{
+	v4l_dbg(2, debug,client,"In tda7432_command\n");
+	if (debug>1)
+		v4l_i2c_print_ioctl(client,cmd);
+
+	switch (cmd) {
+	/* --- v4l ioctls --- */
+	/* take care: bttv does userspace copying, we'll get a
+	   kernel pointer here... */
+	case VIDIOC_QUERYCTRL:
+	{
+		struct v4l2_queryctrl *qc = arg;
+
+		switch (qc->id) {
+			case V4L2_CID_AUDIO_MUTE:
+			case V4L2_CID_AUDIO_VOLUME:
+			case V4L2_CID_AUDIO_BALANCE:
+			case V4L2_CID_AUDIO_BASS:
+			case V4L2_CID_AUDIO_TREBLE:
+			default:
+				return -EINVAL;
+		}
+		return v4l2_ctrl_query_fill_std(qc);
+	}
+	case VIDIOC_S_CTRL:
+		return tda7432_set_ctrl(client, arg);
+
+	case VIDIOC_G_CTRL:
+		return tda7432_get_ctrl(client, arg);
+
+	} /* end of (cmd) switch */
+
+	return 0;
+}
+
+static struct i2c_driver driver = {
+	.driver = {
+		.name    = "tda7432",
+	},
+	.id              = I2C_DRIVERID_TDA7432,
+	.attach_adapter  = tda7432_probe,
+	.detach_client   = tda7432_detach,
+	.command         = tda7432_command,
+};
+
+static struct i2c_client client_template =
+{
+	.name       = "tda7432",
+	.driver     = &driver,
+};
+
+static int __init tda7432_init(void)
+{
+	if ( (loudness < 0) || (loudness > 15) ) {
+		printk(KERN_ERR "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:
+ */