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Commit 6ca2cb99 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6:
  V4L/DVB (9624): CVE-2008-5033: fix OOPS on tvaudio when controlling bass/treble
  V4L/DVB (9623): tvaudio: Improve debug msg by printing something more human
  V4L/DVB (9622): tvaudio: Improve comments and remove a unneeded prototype
  V4L/DVB (9621): Avoid writing outside shadow.bytes[] array
  V4L/DVB (9620): tvaudio: use a direct reference for chip description
  V4L/DVB (9619): tvaudio: update initial comments
  V4L/DVB (9618): tvaudio: add additional logic to avoid OOPS
  V4L/DVB (9617): tvtime: remove generic_checkmode callback
  V4L/DVB (9616): tvaudio: cleanup - group all callbacks together
  V4L/DVB (9615): tvaudio: instead of using a magic number, use ARRAY_SIZE
  V4L/DVB (9613): tvaudio: fix a memory leak
parents 01133148 01a1a3cc

drivers/media/video/tvaudio.c

+149 −82
Original line number Diff line number Diff line 
/*

 * experimental driver for simple i2c audio chips.

 * Driver for simple i2c audio chips.

 *

 * Copyright (c) 2000 Gerd Knorr

 * based on code by:
@@ -7,6 +7,10 @@ 
 *   Steve VanDeBogart (vandebo@uclink.berkeley.edu)

 *   Greg Alexander (galexand@acm.org)

 *

 * Copyright(c) 2005-2008 Mauro Carvalho Chehab

 *	- Some cleanups, code fixes, etc

 *	- Convert it to V4L2 API

 *

 * This code is placed under the terms of the GNU General Public License

 *

 * OPTIONS:
@@ -30,6 +34,7 @@ 


#include <media/tvaudio.h>

#include <media/v4l2-common.h>

#include <media/v4l2-ioctl.h>

#include <media/v4l2-chip-ident.h>

#include <media/v4l2-i2c-drv-legacy.h>
@@ -58,7 +63,6 @@ typedef int (*checkit)(struct CHIPSTATE*); 
typedef int  (*initialize)(struct CHIPSTATE*);

typedef int  (*getmode)(struct CHIPSTATE*);

typedef void (*setmode)(struct CHIPSTATE*, int mode);

typedef void (*checkmode)(struct CHIPSTATE*);



/* i2c command */

typedef struct AUDIOCMD {
@@ -79,6 +83,7 @@ struct CHIPDESC { 
#define CHIP_HAS_VOLUME      1

#define CHIP_HAS_BASSTREBLE  2

#define CHIP_HAS_INPUTSEL    4

#define CHIP_NEED_CHECKMODE  8



	/* various i2c command sequences */

	audiocmd   init;
@@ -96,23 +101,20 @@ struct CHIPDESC { 
	getmode  getmode;

	setmode  setmode;



	/* check / autoswitch audio after channel switches */

	checkmode  checkmode;



	/* input switch register + values for v4l inputs */

	int  inputreg;

	int  inputmap[4];

	int  inputmute;

	int  inputmask;

};

static struct CHIPDESC chiplist[];



/* current state of the chip */

struct CHIPSTATE {

	struct i2c_client *c;



	/* index into CHIPDESC array */

	int type;

	/* chip-specific description - should point to

	   an entry at CHIPDESC table */

	struct CHIPDESC *desc;



	/* shadow register set */

	audiocmd   shadow;
@@ -152,7 +154,7 @@ static int chip_write(struct CHIPSTATE *chip, int subaddr, int val) 
{

	unsigned char buffer[2];



	if (-1 == subaddr) {

	if (subaddr < 0) {

		v4l_dbg(1, debug, chip->c, "%s: chip_write: 0x%x\n",

			chip->c->name, val);

		chip->shadow.bytes[1] = val;
@@ -163,6 +165,13 @@ static int chip_write(struct CHIPSTATE *chip, int subaddr, int val) 
			return -1;

		}

	} else {

		if (subaddr + 1 >= ARRAY_SIZE(chip->shadow.bytes)) {

			v4l_info(chip->c,

				"Tried to access a non-existent register: %d\n",

				subaddr);

			return -EINVAL;

		}



		v4l_dbg(1, debug, chip->c, "%s: chip_write: reg%d=0x%x\n",

			chip->c->name, subaddr, val);

		chip->shadow.bytes[subaddr+1] = val;
@@ -177,12 +186,20 @@ static int chip_write(struct CHIPSTATE *chip, int subaddr, int val) 
	return 0;

}



static int chip_write_masked(struct CHIPSTATE *chip, int subaddr, int val, int mask)

static int chip_write_masked(struct CHIPSTATE *chip,

			     int subaddr, int val, int mask)

{

	if (mask != 0) {

		if (-1 == subaddr) {

		if (subaddr < 0) {

			val = (chip->shadow.bytes[1] & ~mask) | (val & mask);

		} else {

			if (subaddr + 1 >= ARRAY_SIZE(chip->shadow.bytes)) {

				v4l_info(chip->c,

					"Tried to access a non-existent register: %d\n",

					subaddr);

				return -EINVAL;

			}



			val = (chip->shadow.bytes[subaddr+1] & ~mask) | (val & mask);

		}

	}
@@ -228,6 +245,15 @@ static int chip_cmd(struct CHIPSTATE *chip, char *name, audiocmd *cmd) 
	if (0 == cmd->count)

		return 0;



	if (cmd->count + cmd->bytes[0] - 1 >= ARRAY_SIZE(chip->shadow.bytes)) {

		v4l_info(chip->c,

			 "Tried to access a non-existent register range: %d to %d\n",

			 cmd->bytes[0] + 1, cmd->bytes[0] + cmd->count - 1);

		return -EINVAL;

	}



	/* FIXME: it seems that the shadow bytes are wrong bellow !*/



	/* update our shadow register set; print bytes if (debug > 0) */

	v4l_dbg(1, debug, chip->c, "%s: chip_cmd(%s): reg=%d, data:",

		chip->c->name, name,cmd->bytes[0]);
@@ -263,7 +289,8 @@ static void chip_thread_wake(unsigned long data) 
static int chip_thread(void *data)

{

	struct CHIPSTATE *chip = data;

	struct CHIPDESC  *desc = chiplist + chip->type;

	struct CHIPDESC  *desc = chip->desc;

	int mode;



	v4l_dbg(1, debug, chip->c, "%s: thread started\n", chip->c->name);

	set_freezable();
@@ -282,25 +309,14 @@ static int chip_thread(void *data) 
			continue;



		/* have a look what's going on */

		desc->checkmode(chip);



		/* schedule next check */

		mod_timer(&chip->wt, jiffies+msecs_to_jiffies(2000));

	}



	v4l_dbg(1, debug, chip->c, "%s: thread exiting\n", chip->c->name);

	return 0;

}



static void generic_checkmode(struct CHIPSTATE *chip)

{

	struct CHIPDESC  *desc = chiplist + chip->type;

	int mode = desc->getmode(chip);



		mode = desc->getmode(chip);

		if (mode == chip->prevmode)

	return;

			continue;



		/* chip detected a new audio mode - set it */

		v4l_dbg(1, debug, chip->c, "%s: thread checkmode\n",

			chip->c->name);



	v4l_dbg(1, debug, chip->c, "%s: thread checkmode\n", chip->c->name);

		chip->prevmode = mode;



		if (mode & V4L2_TUNER_MODE_STEREO)
@@ -313,6 +329,13 @@ static void generic_checkmode(struct CHIPSTATE *chip) 
			desc->setmode(chip, V4L2_TUNER_MODE_LANG2);

		else

			desc->setmode(chip, V4L2_TUNER_MODE_MONO);



		/* schedule next check */

		mod_timer(&chip->wt, jiffies+msecs_to_jiffies(2000));

	}



	v4l_dbg(1, debug, chip->c, "%s: thread exiting\n", chip->c->name);

	return 0;

}



/* ---------------------------------------------------------------------- */
@@ -777,7 +800,7 @@ static struct tda9874a_MODES { 
	char *name;

	audiocmd cmd;

} tda9874a_modelist[9] = {

  {	"A2, B/G",

  {	"A2, B/G", /* default */

	{ 9, { TDA9874A_C1FRA, 0x72,0x95,0x55, 0x77,0xA0,0x00, 0x00,0x00 }} },

  {	"A2, M (Korea)",

	{ 9, { TDA9874A_C1FRA, 0x5D,0xC0,0x00, 0x62,0x6A,0xAA, 0x20,0x22 }} },
@@ -791,7 +814,7 @@ static struct tda9874a_MODES { 
	{ 9, { TDA9874A_C1FRA, 0x7D,0x00,0x00, 0x88,0x8A,0xAA, 0x08,0x33 }} },

  {	"NICAM, B/G",

	{ 9, { TDA9874A_C1FRA, 0x72,0x95,0x55, 0x79,0xEA,0xAA, 0x08,0x33 }} },

  {	"NICAM, D/K", /* default */

  {	"NICAM, D/K",

	{ 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x79,0xEA,0xAA, 0x08,0x33 }} },

  {	"NICAM, L",

	{ 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x79,0xEA,0xAA, 0x09,0x33 }} }
@@ -981,7 +1004,7 @@ static int tda9874a_initialize(struct CHIPSTATE *chip) 
{

	if (tda9874a_SIF > 2)

		tda9874a_SIF = 1;

	if (tda9874a_STD > 8)

	if (tda9874a_STD >= ARRAY_SIZE(tda9874a_modelist))

		tda9874a_STD = 0;

	if(tda9874a_AMSEL > 1)

		tda9874a_AMSEL = 0;
@@ -1089,7 +1112,7 @@ static int tda8425_shift12(int val) { return (val >> 12) | 0xf0; } 


static int tda8425_initialize(struct CHIPSTATE *chip)

{

	struct CHIPDESC *desc = chiplist + chip->type;

	struct CHIPDESC *desc = chip->desc;

	int inputmap[4] = { /* tuner	*/ TDA8425_S1_CH2, /* radio  */ TDA8425_S1_CH1,

			    /* extern	*/ TDA8425_S1_CH1, /* intern */ TDA8425_S1_OFF};
@@ -1259,27 +1282,28 @@ static struct CHIPDESC chiplist[] = { 
		.addr_lo    = I2C_ADDR_TDA9840 >> 1,

		.addr_hi    = I2C_ADDR_TDA9840 >> 1,

		.registers  = 5,

		.flags      = CHIP_NEED_CHECKMODE,



		/* callbacks */

		.checkit    = tda9840_checkit,

		.getmode    = tda9840_getmode,

		.setmode    = tda9840_setmode,

		.checkmode  = generic_checkmode,



		.init       = { 2, { TDA9840_TEST, TDA9840_TEST_INT1SN

				/* ,TDA9840_SW, TDA9840_MONO */} }

	},

	{

		.name       = "tda9873h",

		.checkit    = tda9873_checkit,

		.insmodopt  = &tda9873,

		.addr_lo    = I2C_ADDR_TDA985x_L >> 1,

		.addr_hi    = I2C_ADDR_TDA985x_H >> 1,

		.registers  = 3,

		.flags      = CHIP_HAS_INPUTSEL,

		.flags      = CHIP_HAS_INPUTSEL | CHIP_NEED_CHECKMODE,



		/* callbacks */

		.checkit    = tda9873_checkit,

		.getmode    = tda9873_getmode,

		.setmode    = tda9873_setmode,

		.checkmode  = generic_checkmode,



		.init       = { 4, { TDA9873_SW, 0xa4, 0x06, 0x03 } },

		.inputreg   = TDA9873_SW,
@@ -1290,15 +1314,16 @@ static struct CHIPDESC chiplist[] = { 
	},

	{

		.name       = "tda9874h/a",

		.checkit    = tda9874a_checkit,

		.initialize = tda9874a_initialize,

		.insmodopt  = &tda9874a,

		.addr_lo    = I2C_ADDR_TDA9874 >> 1,

		.addr_hi    = I2C_ADDR_TDA9874 >> 1,

		.flags      = CHIP_NEED_CHECKMODE,



		/* callbacks */

		.initialize = tda9874a_initialize,

		.checkit    = tda9874a_checkit,

		.getmode    = tda9874a_getmode,

		.setmode    = tda9874a_setmode,

		.checkmode  = generic_checkmode,

	},

	{

		.name       = "tda9850",
@@ -1324,10 +1349,11 @@ static struct CHIPDESC chiplist[] = { 
		.rightreg   = TDA9855_VR,

		.bassreg    = TDA9855_BA,

		.treblereg  = TDA9855_TR,



		/* callbacks */

		.volfunc    = tda9855_volume,

		.bassfunc   = tda9855_bass,

		.treblefunc = tda9855_treble,



		.getmode    = tda985x_getmode,

		.setmode    = tda985x_setmode,
@@ -1348,6 +1374,8 @@ static struct CHIPDESC chiplist[] = { 
		.rightreg   = TEA6300_VL,

		.bassreg    = TEA6300_BA,

		.treblereg  = TEA6300_TR,



		/* callbacks */

		.volfunc    = tea6300_shift10,

		.bassfunc   = tea6300_shift12,

		.treblefunc = tea6300_shift12,
@@ -1358,7 +1386,6 @@ static struct CHIPDESC chiplist[] = { 
	},

	{

		.name       = "tea6320",

		.initialize = tea6320_initialize,

		.insmodopt  = &tea6320,

		.addr_lo    = I2C_ADDR_TEA6300 >> 1,

		.addr_hi    = I2C_ADDR_TEA6300 >> 1,
@@ -1369,6 +1396,9 @@ static struct CHIPDESC chiplist[] = { 
		.rightreg   = TEA6320_V,

		.bassreg    = TEA6320_BA,

		.treblereg  = TEA6320_TR,



		/* callbacks */

		.initialize = tea6320_initialize,

		.volfunc    = tea6320_volume,

		.bassfunc   = tea6320_shift11,

		.treblefunc = tea6320_shift11,
@@ -1401,16 +1431,18 @@ static struct CHIPDESC chiplist[] = { 
		.rightreg   = TDA8425_VR,

		.bassreg    = TDA8425_BA,

		.treblereg  = TDA8425_TR,



		/* callbacks */

		.initialize = tda8425_initialize,

		.volfunc    = tda8425_shift10,

		.bassfunc   = tda8425_shift12,

		.treblefunc = tda8425_shift12,

		.setmode    = tda8425_setmode,



		.inputreg   = TDA8425_S1,

		.inputmap   = { TDA8425_S1_CH1, TDA8425_S1_CH1, TDA8425_S1_CH1 },

		.inputmute  = TDA8425_S1_OFF,



		.setmode    = tda8425_setmode,

		.initialize = tda8425_initialize,

	},

	{

		.name       = "pic16c54 (PV951)",
@@ -1434,10 +1466,11 @@ static struct CHIPDESC chiplist[] = { 
		.addr_lo    = I2C_ADDR_TDA9840 >> 1,

		.addr_hi    = I2C_ADDR_TDA9840 >> 1,

		.registers  = 2,

		.flags      = CHIP_NEED_CHECKMODE,



		/* callbacks */

		.getmode    = ta8874z_getmode,

		.setmode    = ta8874z_setmode,

		.checkmode  = generic_checkmode,



		.init       = {2, { TA8874Z_MONO_SET, TA8874Z_SEPARATION_DEFAULT}},

	},
@@ -1481,6 +1514,7 @@ static int chip_probe(struct i2c_client *client, const struct i2c_device_id *id) 
	}

	if (desc->name == NULL) {

		v4l_dbg(1, debug, client, "no matching chip description found\n");

		kfree(chip);

		return -EIO;

	}

	v4l_info(client, "%s found @ 0x%x (%s)\n", desc->name, client->addr<<1, client->adapter->name);
@@ -1494,7 +1528,7 @@ static int chip_probe(struct i2c_client *client, const struct i2c_device_id *id) 
	/* fill required data structures */

	if (!id)

		strlcpy(client->name, desc->name, I2C_NAME_SIZE);

	chip->type = desc-chiplist;

	chip->desc = desc;

	chip->shadow.count = desc->registers+1;

	chip->prevmode = -1;

	chip->audmode = V4L2_TUNER_MODE_LANG1;
@@ -1506,20 +1540,49 @@ static int chip_probe(struct i2c_client *client, const struct i2c_device_id *id) 
		chip_cmd(chip,"init",&desc->init);



	if (desc->flags & CHIP_HAS_VOLUME) {

		if (!desc->volfunc) {

			/* This shouldn't be happen. Warn user, but keep working

			   without volume controls

			 */

			v4l_info(chip->c, "volume callback undefined!\n");

			desc->flags &= ~CHIP_HAS_VOLUME;

		} else {

			chip->left  = desc->leftinit  ? desc->leftinit  : 65535;

			chip->right = desc->rightinit ? desc->rightinit : 65535;

		chip_write(chip,desc->leftreg,desc->volfunc(chip->left));

		chip_write(chip,desc->rightreg,desc->volfunc(chip->right));

			chip_write(chip, desc->leftreg,

				   desc->volfunc(chip->left));

			chip_write(chip, desc->rightreg,

				   desc->volfunc(chip->right));

		}

	}

	if (desc->flags & CHIP_HAS_BASSTREBLE) {

		chip->treble = desc->trebleinit ? desc->trebleinit : 32768;

		chip->bass   = desc->bassinit   ? desc->bassinit   : 32768;

		chip_write(chip,desc->bassreg,desc->bassfunc(chip->bass));

		chip_write(chip,desc->treblereg,desc->treblefunc(chip->treble));

		if (!desc->bassfunc || !desc->treblefunc) {

			/* This shouldn't be happen. Warn user, but keep working

			   without bass/treble controls

			 */

			v4l_info(chip->c, "bass/treble callbacks undefined!\n");

			desc->flags &= ~CHIP_HAS_BASSTREBLE;

		} else {

			chip->treble = desc->trebleinit ?

						desc->trebleinit : 32768;

			chip->bass   = desc->bassinit   ?

						desc->bassinit   : 32768;

			chip_write(chip, desc->bassreg,

				   desc->bassfunc(chip->bass));

			chip_write(chip, desc->treblereg,

				   desc->treblefunc(chip->treble));

		}

	}



	chip->thread = NULL;

	if (desc->checkmode) {

	if (desc->flags & CHIP_NEED_CHECKMODE) {

		if (!desc->getmode || !desc->setmode) {

			/* This shouldn't be happen. Warn user, but keep working

			   without kthread

			 */

			v4l_info(chip->c, "set/get mode callbacks undefined!\n");

			return 0;

		}

		/* start async thread */

		init_timer(&chip->wt);

		chip->wt.function = chip_thread_wake;
@@ -1552,7 +1615,7 @@ static int chip_remove(struct i2c_client *client) 
static int tvaudio_get_ctrl(struct CHIPSTATE *chip,

			    struct v4l2_control *ctrl)

{

	struct CHIPDESC *desc = chiplist + chip->type;

	struct CHIPDESC *desc = chip->desc;



	switch (ctrl->id) {

	case V4L2_CID_AUDIO_MUTE:
@@ -1576,13 +1639,13 @@ static int tvaudio_get_ctrl(struct CHIPSTATE *chip, 
		return 0;

	}

	case V4L2_CID_AUDIO_BASS:

		if (desc->flags & CHIP_HAS_BASSTREBLE)

		if (!(desc->flags & CHIP_HAS_BASSTREBLE))

			break;

		ctrl->value = chip->bass;

		return 0;

	case V4L2_CID_AUDIO_TREBLE:

		if (desc->flags & CHIP_HAS_BASSTREBLE)

			return -EINVAL;

		if (!(desc->flags & CHIP_HAS_BASSTREBLE))

			break;

		ctrl->value = chip->treble;

		return 0;

	}
@@ -1592,7 +1655,7 @@ static int tvaudio_get_ctrl(struct CHIPSTATE *chip, 
static int tvaudio_set_ctrl(struct CHIPSTATE *chip,

			    struct v4l2_control *ctrl)

{

	struct CHIPDESC *desc = chiplist + chip->type;

	struct CHIPDESC *desc = chip->desc;



	switch (ctrl->id) {

	case V4L2_CID_AUDIO_MUTE:
@@ -1642,16 +1705,15 @@ static int tvaudio_set_ctrl(struct CHIPSTATE *chip, 
		return 0;

	}

	case V4L2_CID_AUDIO_BASS:

		if (desc->flags & CHIP_HAS_BASSTREBLE)

		if (!(desc->flags & CHIP_HAS_BASSTREBLE))

			break;

		chip->bass = ctrl->value;

		chip_write(chip,desc->bassreg,desc->bassfunc(chip->bass));



		return 0;

	case V4L2_CID_AUDIO_TREBLE:

		if (desc->flags & CHIP_HAS_BASSTREBLE)

			return -EINVAL;



		if (!(desc->flags & CHIP_HAS_BASSTREBLE))

			break;

		chip->treble = ctrl->value;

		chip_write(chip,desc->treblereg,desc->treblefunc(chip->treble));
@@ -1668,9 +1730,12 @@ static int chip_command(struct i2c_client *client, 
			unsigned int cmd, void *arg)

{

	struct CHIPSTATE *chip = i2c_get_clientdata(client);

	struct CHIPDESC  *desc = chiplist + chip->type;

	struct CHIPDESC  *desc = chip->desc;



	v4l_dbg(1, debug, chip->c, "%s: chip_command 0x%x\n", chip->c->name, cmd);

	if (debug > 0) {

		v4l_i2c_print_ioctl(chip->c, cmd);

		printk("\n");

	}



	switch (cmd) {

	case AUDC_SET_RADIO:
@@ -1695,7 +1760,7 @@ static int chip_command(struct i2c_client *client, 
				break;

			case V4L2_CID_AUDIO_BASS:

			case V4L2_CID_AUDIO_TREBLE:

				if (desc->flags & CHIP_HAS_BASSTREBLE)

				if (!(desc->flags & CHIP_HAS_BASSTREBLE))

					return -EINVAL;

				break;

			default:
@@ -1792,12 +1857,20 @@ static int chip_command(struct i2c_client *client, 
		break;

	case VIDIOC_S_FREQUENCY:

		chip->mode = 0; /* automatic */

		if (desc->checkmode && desc->setmode) {



		/* For chips that provide getmode and setmode, and doesn't

		   automatically follows the stereo carrier, a kthread is

		   created to set the audio standard. In this case, when then

		   the video channel is changed, tvaudio starts on MONO mode.

		   After waiting for 2 seconds, the kernel thread is called,

		   to follow whatever audio standard is pointed by the

		   audio carrier.

		 */

		if (chip->thread) {

			desc->setmode(chip,V4L2_TUNER_MODE_MONO);

			if (chip->prevmode != V4L2_TUNER_MODE_MONO)

				chip->prevmode = -1; /* reset previous mode */

			mod_timer(&chip->wt, jiffies+msecs_to_jiffies(2000));

			/* the thread will call checkmode() later */

		}

		break;
@@ -1836,9 +1909,3 @@ static struct v4l2_i2c_driver_data v4l2_i2c_data = { 
	.legacy_probe = chip_legacy_probe,

	.id_table = chip_id,

};
 


/*

 * Local variables:

 * c-basic-offset: 8

 * End:

 */