[alsa-devel] fm801: implement TEA575x tuner autodetection

[Takashi Iwai]

At Tue, 10 May 2011 23:24:15 +0200,
Ondrej Zary wrote:
> 
> Autodetect TEA575x tuner connection type during init. This allows tuner to
> work out-of-the box.
> 
> tea575x_tuner module parameter remains functional to force tuner type.
> 
> Tested with SF256-PCP and SF64-PCR.
> 
> Signed-off-by: Ondrej Zary <linux at rainbow-software.org>

Applied now.  Thanks.


Takashi

> 
> --- linux-2.6.39-rc2-/sound/pci/fm801.c	2011-05-10 22:31:45.000000000 +0200
> +++ linux-2.6.39-rc2/sound/pci/fm801.c	2011-05-10 23:21:42.000000000 +0200
> @@ -53,7 +53,7 @@ static int enable[SNDRV_CARDS] = SNDRV_D
>  /*
>   *  Enable TEA575x tuner
>   *    1 = MediaForte 256-PCS
> - *    2 = MediaForte 256-PCPR
> + *    2 = MediaForte 256-PCP
>   *    3 = MediaForte 64-PCR
>   *   16 = setup tuner only (this is additional bit), i.e. SF64-PCR FM card
>   *  High 16-bits are video (radio) device number + 1
> @@ -67,7 +67,7 @@ MODULE_PARM_DESC(id, "ID string for the
>  module_param_array(enable, bool, NULL, 0444);
>  MODULE_PARM_DESC(enable, "Enable FM801 soundcard.");
>  module_param_array(tea575x_tuner, int, NULL, 0444);
> -MODULE_PARM_DESC(tea575x_tuner, "TEA575x tuner access method (1 = SF256-PCS, 2=SF256-PCPR, 3=SF64-PCR, +16=tuner-only).");
> +MODULE_PARM_DESC(tea575x_tuner, "TEA575x tuner access method (0 = auto, 1 = SF256-PCS, 2=SF256-PCP, 3=SF64-PCR, 8=disable, +16=tuner-only).");
>  
>  #define TUNER_ONLY		(1<<4)
>  #define TUNER_TYPE_MASK		(~TUNER_ONLY & 0xFFFF)
> @@ -720,12 +720,13 @@ static int __devinit snd_fm801_pcm(struc
>  /* GPIO to TEA575x maps */
>  struct snd_fm801_tea575x_gpio {
>  	u8 data, clk, wren, most;
> +	char *name;
>  };
>  
>  static struct snd_fm801_tea575x_gpio snd_fm801_tea575x_gpios[] = {
> -	{ .data = 1, .clk = 3, .wren = 2, .most = 0 },	/* SF256-PCS */
> -	{ .data = 1, .clk = 0, .wren = 2, .most = 3 },	/* SF256-PCP */
> -	{ .data = 2, .clk = 0, .wren = 1, .most = 3 },	/* SF64-PCR */
> +	{ .data = 1, .clk = 3, .wren = 2, .most = 0, .name = "SF256-PCS" },
> +	{ .data = 1, .clk = 0, .wren = 2, .most = 3, .name = "SF256-PCP" },
> +	{ .data = 2, .clk = 0, .wren = 1, .most = 3, .name = "SF64-PCR" },
>  };
>  
>  static void snd_fm801_tea575x_set_pins(struct snd_tea575x *tea, u8 pins)
> @@ -1229,14 +1230,24 @@ static int __devinit snd_fm801_create(st
>  	snd_card_set_dev(card, &pci->dev);
>  
>  #ifdef TEA575X_RADIO
> +	chip->tea.card = card;
> +	chip->tea.freq_fixup = 10700;
> +	chip->tea.private_data = chip;
> +	chip->tea.ops = &snd_fm801_tea_ops;
>  	if ((tea575x_tuner & TUNER_TYPE_MASK) > 0 &&
>  	    (tea575x_tuner & TUNER_TYPE_MASK) < 4) {
> -		chip->tea.card = card;
> -		chip->tea.freq_fixup = 10700;
> -		chip->tea.private_data = chip;
> -		chip->tea.ops = &snd_fm801_tea_ops;
> -		snd_tea575x_init(&chip->tea);
> -	}
> +		if (snd_tea575x_init(&chip->tea))
> +			snd_printk(KERN_ERR "TEA575x radio not found\n");
> +	} else if ((tea575x_tuner & TUNER_TYPE_MASK) == 0)
> +		/* autodetect tuner connection */
> +		for (tea575x_tuner = 1; tea575x_tuner <= 3; tea575x_tuner++) {
> +			chip->tea575x_tuner = tea575x_tuner;
> +			if (!snd_tea575x_init(&chip->tea)) {
> +				snd_printk(KERN_INFO "detected TEA575x radio type %s\n",
> +					snd_fm801_tea575x_gpios[tea575x_tuner - 1].name);
> +				break;
> +			}
> +		}
>  #endif
>  
>  	*rchip = chip;
> 
> 
> -- 
> Ondrej Zary
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