bttv-driver.c

This program is free software you can redistribute it and/or modify it under the terms of the GNU Ge

static const struct v4l2_queryctrl no_ctl = {
	.name  = "42",
	.flags = V4L2_CTRL_FLAG_DISABLED,
};
static const struct v4l2_queryctrl bttv_ctls[] = {
	/* --- video --- */
	{
		.id            = V4L2_CID_BRIGHTNESS,
		.name          = "Brightness",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 256,
		.default_value = 32768,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_CONTRAST,
		.name          = "Contrast",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 128,
		.default_value = 32768,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_SATURATION,
		.name          = "Saturation",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 128,
		.default_value = 32768,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_HUE,
		.name          = "Hue",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 256,
		.default_value = 32768,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},
	/* --- audio --- */
	{
		.id            = V4L2_CID_AUDIO_MUTE,
		.name          = "Mute",
		.minimum       = 0,
		.maximum       = 1,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_AUDIO_VOLUME,
		.name          = "Volume",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 65535/100,
		.default_value = 65535,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_AUDIO_BALANCE,
		.name          = "Balance",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 65535/100,
		.default_value = 32768,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_AUDIO_BASS,
		.name          = "Bass",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 65535/100,
		.default_value = 32768,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_AUDIO_TREBLE,
		.name          = "Treble",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 65535/100,
		.default_value = 32768,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},
	/* --- private --- */
	{
		.id            = V4L2_CID_PRIVATE_CHROMA_AGC,
		.name          = "chroma agc",
		.minimum       = 0,
		.maximum       = 1,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_PRIVATE_COMBFILTER,
		.name          = "combfilter",
		.minimum       = 0,
		.maximum       = 1,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_PRIVATE_AUTOMUTE,
		.name          = "automute",
		.minimum       = 0,
		.maximum       = 1,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_PRIVATE_LUMAFILTER,
		.name          = "luma decimation filter",
		.minimum       = 0,
		.maximum       = 1,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_PRIVATE_AGC_CRUSH,
		.name          = "agc crush",
		.minimum       = 0,
		.maximum       = 1,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_PRIVATE_VCR_HACK,
		.name          = "vcr hack",
		.minimum       = 0,
		.maximum       = 1,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_PRIVATE_WHITECRUSH_UPPER,
		.name          = "whitecrush upper",
		.minimum       = 0,
		.maximum       = 255,
		.step          = 1,
		.default_value = 0xCF,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_PRIVATE_WHITECRUSH_LOWER,
		.name          = "whitecrush lower",
		.minimum       = 0,
		.maximum       = 255,
		.step          = 1,
		.default_value = 0x7F,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	}

};
const int BTTV_CTLS = ARRAY_SIZE(bttv_ctls);

/* ----------------------------------------------------------------------- */
/* resource management                                                     */

static
int check_alloc_btres(struct bttv *btv, struct bttv_fh *fh, int bit)
{
	if (fh->resources & bit)
		/* have it already allocated */
		return 1;

	/* is it free? */
	down(&btv->reslock);
	if (btv->resources & bit) {
		/* no, someone else uses it */
		up(&btv->reslock);
		return 0;
	}
	/* it's free, grab it */
	fh->resources  |= bit;
	btv->resources |= bit;
	up(&btv->reslock);
	return 1;
}

static
int check_btres(struct bttv_fh *fh, int bit)
{
	return (fh->resources & bit);
}

static
int locked_btres(struct bttv *btv, int bit)
{
	return (btv->resources & bit);
}

static
void free_btres(struct bttv *btv, struct bttv_fh *fh, int bits)
{
#if 1 /* DEBUG */
	if ((fh->resources & bits) != bits) {
		/* trying to free ressources not allocated by us ... */
		printk("bttv: BUG! (btres)\n");
	}
#endif
	down(&btv->reslock);
	fh->resources  &= ~bits;
	btv->resources &= ~bits;
	up(&btv->reslock);
}

/* ----------------------------------------------------------------------- */
/* If Bt848a or Bt849, use PLL for PAL/SECAM and crystal for NTSC          */

/* Frequency = (F_input / PLL_X) * PLL_I.PLL_F/PLL_C 
   PLL_X = Reference pre-divider (0=1, 1=2) 
   PLL_C = Post divider (0=6, 1=4)
   PLL_I = Integer input 
   PLL_F = Fractional input 
   
   F_input = 28.636363 MHz: 
   PAL (CLKx2 = 35.46895 MHz): PLL_X = 1, PLL_I = 0x0E, PLL_F = 0xDCF9, PLL_C = 0
*/

static void set_pll_freq(struct bttv *btv, unsigned int fin, unsigned int fout)
{
        unsigned char fl, fh, fi;
        
        /* prevent overflows */
        fin/=4;
        fout/=4;

        fout*=12;
        fi=fout/fin;

        fout=(fout%fin)*256;
        fh=fout/fin;

        fout=(fout%fin)*256;
        fl=fout/fin;

        btwrite(fl, BT848_PLL_F_LO);
        btwrite(fh, BT848_PLL_F_HI);
        btwrite(fi|BT848_PLL_X, BT848_PLL_XCI);
}

static void set_pll(struct bttv *btv)
{
        int i;

        if (!btv->pll.pll_crystal)
                return;

	if (btv->pll.pll_ofreq == btv->pll.pll_current) {
		dprintk("bttv%d: PLL: no change required\n",btv->c.nr);
                return;
        }

        if (btv->pll.pll_ifreq == btv->pll.pll_ofreq) {
                /* no PLL needed */
                if (btv->pll.pll_current == 0)
                        return;
		vprintk(KERN_INFO "bttv%d: PLL can sleep, using XTAL (%d).\n",
			btv->c.nr,btv->pll.pll_ifreq);
                btwrite(0x00,BT848_TGCTRL);
                btwrite(0x00,BT848_PLL_XCI);
                btv->pll.pll_current = 0;
                return;
        }

	vprintk(KERN_INFO "bttv%d: PLL: %d => %d ",btv->c.nr,
		btv->pll.pll_ifreq, btv->pll.pll_ofreq);
	set_pll_freq(btv, btv->pll.pll_ifreq, btv->pll.pll_ofreq);

        for (i=0; i<10; i++) {
		/*  Let other people run while the PLL stabilizes */
		vprintk(".");
		set_current_state(TASK_INTERRUPTIBLE);
		schedule_timeout(HZ/10);
		
                if (btread(BT848_DSTATUS) & BT848_DSTATUS_PLOCK) {
			btwrite(0,BT848_DSTATUS);
                } else {
                        btwrite(0x08,BT848_TGCTRL);
                        btv->pll.pll_current = btv->pll.pll_ofreq;
			vprintk(" ok\n");
                        return;
                }
        }
        btv->pll.pll_current = -1;
	vprintk("failed\n");
        return;
}

/* used to switch between the bt848's analog/digital video capture modes */
void bt848A_set_timing(struct bttv *btv)
{
	int i, len;
	int table_idx = bttv_tvnorms[btv->tvnorm].sram;
	int fsc       = bttv_tvnorms[btv->tvnorm].Fsc;

	if (UNSET == bttv_tvcards[btv->c.type].muxsel[btv->input]) {
		dprintk("bttv%d: load digital timing table (table_idx=%d)\n",
			btv->c.nr,table_idx);

		/* timing change...reset timing generator address */
       		btwrite(0x00, BT848_TGCTRL);
       		btwrite(0x02, BT848_TGCTRL);
       		btwrite(0x00, BT848_TGCTRL);

		len=SRAM_Table[table_idx][0];
		for(i = 1; i <= len; i++)
			btwrite(SRAM_Table[table_idx][i],BT848_TGLB);
		btv->pll.pll_ofreq = 27000000;

		set_pll(btv);
		btwrite(0x11, BT848_TGCTRL);
		btwrite(0x41, BT848_DVSIF);
	} else {
		btv->pll.pll_ofreq = fsc;
		set_pll(btv);
		btwrite(0x0, BT848_DVSIF);
	}
}

/* ----------------------------------------------------------------------- */

static void bt848_bright(struct bttv *btv, int bright)
{
	int value;

	btv->bright = bright;

	/* We want -128 to 127 we get 0-65535 */
	value = (bright >> 8) - 128;
	btwrite(value & 0xff, BT848_BRIGHT);
}

static void bt848_hue(struct bttv *btv, int hue)
{
	int value;
	
	btv->hue = hue;

	/* -128 to 127 */
	value = (hue >> 8) - 128;
        btwrite(value & 0xff, BT848_HUE);
}

static void bt848_contrast(struct bttv *btv, int cont)
{
	int value,hibit;
	
	btv->contrast = cont;
	
	/* 0-511 */
	value = (cont  >> 7);
	hibit = (value >> 6) & 4;
        btwrite(value & 0xff, BT848_CONTRAST_LO);
        btaor(hibit, ~4, BT848_E_CONTROL);
        btaor(hibit, ~4, BT848_O_CONTROL);
}

static void bt848_sat(struct bttv *btv, int color)
{
	int val_u,val_v,hibits;
	
	btv->saturation = color;

	/* 0-511 for the color */
	val_u   = color >> 7;
	val_v   = ((color>>7)*180L)/254;
        hibits  = (val_u >> 7) & 2;
	hibits |= (val_v >> 8) & 1;
        btwrite(val_u & 0xff, BT848_SAT_U_LO);
        btwrite(val_v & 0xff, BT848_SAT_V_LO);
        btaor(hibits, ~3, BT848_E_CONTROL);
        btaor(hibits, ~3, BT848_O_CONTROL);
}

/* ----------------------------------------------------------------------- */

static int
video_mux(struct bttv *btv, unsigned int input)
{
	int mux,mask2;

	if (input >= bttv_tvcards[btv->c.type].video_inputs)
		return -EINVAL;

        /* needed by RemoteVideo MX */
	mask2 = bttv_tvcards[btv->c.type].gpiomask2;
	if (mask2)
		gpio_inout(mask2,mask2);

	if (input == btv->svhs)  {
		btor(BT848_CONTROL_COMP, BT848_E_CONTROL);
		btor(BT848_CONTROL_COMP, BT848_O_CONTROL);
	} else {
		btand(~BT848_CONTROL_COMP, BT848_E_CONTROL);
		btand(~BT848_CONTROL_COMP, BT848_O_CONTROL);
	}
	mux = bttv_tvcards[btv->c.type].muxsel[input] & 3;
	btaor(mux<<5, ~(3<<5), BT848_IFORM);
	dprintk(KERN_DEBUG "bttv%d: video mux: input=%d mux=%d\n",
		btv->c.nr,input,mux);

	/* card specific hook */
	if(bttv_tvcards[btv->c.type].muxsel_hook)
		bttv_tvcards[btv->c.type].muxsel_hook (btv, input);
	return 0;
}

static char *audio_modes[] = {
	"audio: tuner", "audio: radio", "audio: extern",
	"audio: intern", "audio: off"
};

static int
audio_mux(struct bttv *btv, int mode)
{
	int val,mux,i2c_mux,signal;

	gpio_inout(bttv_tvcards[btv->c.type].gpiomask,
		   bttv_tvcards[btv->c.type].gpiomask);
	signal = btread(BT848_DSTATUS) & BT848_DSTATUS_HLOC;

	switch (mode) {
	case AUDIO_MUTE:
		btv->audio |= AUDIO_MUTE;
		break;
	case AUDIO_UNMUTE:
		btv->audio &= ~AUDIO_MUTE;
		break;
	case AUDIO_TUNER:
	case AUDIO_RADIO:
	case AUDIO_EXTERN:
	case AUDIO_INTERN:
		btv->audio &= AUDIO_MUTE;
		btv->audio |= mode;
	}
	i2c_mux = mux = (btv->audio & AUDIO_MUTE) ? AUDIO_OFF : btv->audio;
	if (btv->opt_automute && !signal && !btv->radio_user)
		mux = AUDIO_OFF;
#if 0
	printk("bttv%d: amux: mode=%d audio=%d signal=%s mux=%d/%d irq=%s\n",
	       btv->c.nr, mode, btv->audio, signal ? "yes" : "no",
	       mux, i2c_mux, in_interrupt() ? "yes" : "no");
#endif

	val = bttv_tvcards[btv->c.type].audiomux[mux];
	gpio_bits(bttv_tvcards[btv->c.type].gpiomask,val);
	if (bttv_gpio)
		bttv_gpio_tracking(btv,audio_modes[mux]);
	if (!in_interrupt())
		bttv_call_i2c_clients(btv,AUDC_SET_INPUT,&(i2c_mux));
	return 0;
}

static void
i2c_vidiocschan(struct bttv *btv)
{
	struct video_channel c;

	memset(&c,0,sizeof(c));
	c.norm    = btv->tvnorm;
	c.channel = btv->input;
	bttv_call_i2c_clients(btv,VIDIOCSCHAN,&c);
	if (btv->c.type == BTTV_VOODOOTV_FM)
		bttv_tda9880_setnorm(btv,c.norm);
}

static int
set_tvnorm(struct bttv *btv, unsigned int norm)
{
	const struct bttv_tvnorm *tvnorm;

	if (norm < 0 || norm >= BTTV_TVNORMS)
		return -EINVAL;

	btv->tvnorm = norm;
	tvnorm = &bttv_tvnorms[norm];

	btwrite(tvnorm->adelay, BT848_ADELAY);
	btwrite(tvnorm->bdelay, BT848_BDELAY);
	btaor(tvnorm->iform,~(BT848_IFORM_NORM|BT848_IFORM_XTBOTH),
	      BT848_IFORM);
	btwrite(tvnorm->vbipack, BT848_VBI_PACK_SIZE);
	btwrite(1, BT848_VBI_PACK_DEL);
	bt848A_set_timing(btv);

	switch (btv->c.type) {
	case BTTV_VOODOOTV_FM:
		bttv_tda9880_setnorm(btv,norm);
		break;
#if 0
	case BTTV_OSPREY540:
		osprey_540_set_norm(btv,norm);
		break;
#endif
	}
	return 0;
}

static void
set_input(struct bttv *btv, unsigned int input)
{
	unsigned long flags;
	
	btv->input = input;
	if (irq_iswitch) {
		spin_lock_irqsave(&btv->s_lock,flags);
		if (btv->curr.irqflags) {
			/* active capture -> delayed input switch */