sound/pci/ca0106/ca0106_proc.c

Source file repositories/reference/linux-study-clean/sound/pci/ca0106/ca0106_proc.c

File Facts

System
Linux kernel
Corpus path
sound/pci/ca0106/ca0106_proc.c
Extension
.c
Size
12937 bytes
Lines
428
Domain
Driver Families
Bucket
sound/pci
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct snd_ca0106_category_str {
	int val;
	const char *name;
};

static const struct snd_ca0106_category_str snd_ca0106_con_category[] = {
	{ IEC958_AES1_CON_DAT, "DAT" },
	{ IEC958_AES1_CON_VCR, "VCR" },
	{ IEC958_AES1_CON_MICROPHONE, "microphone" },
	{ IEC958_AES1_CON_SYNTHESIZER, "synthesizer" },
	{ IEC958_AES1_CON_RATE_CONVERTER, "rate converter" },
	{ IEC958_AES1_CON_MIXER, "mixer" },
	{ IEC958_AES1_CON_SAMPLER, "sampler" },
	{ IEC958_AES1_CON_PCM_CODER, "PCM coder" },
	{ IEC958_AES1_CON_IEC908_CD, "CD" },
	{ IEC958_AES1_CON_NON_IEC908_CD, "non-IEC908 CD" },
	{ IEC958_AES1_CON_GENERAL, "general" },
};


static void snd_ca0106_proc_dump_iec958( struct snd_info_buffer *buffer, u32 value)
{
	int i;
	u32 status[4];
	status[0] = value & 0xff;
	status[1] = (value >> 8) & 0xff;
	status[2] = (value >> 16)  & 0xff;
	status[3] = (value >> 24)  & 0xff;
	
	if (! (status[0] & IEC958_AES0_PROFESSIONAL)) {
		/* consumer */
		snd_iprintf(buffer, "Mode: consumer\n");
		snd_iprintf(buffer, "Data: ");
		if (!(status[0] & IEC958_AES0_NONAUDIO)) {
			snd_iprintf(buffer, "audio\n");
		} else {
			snd_iprintf(buffer, "non-audio\n");
		}
		snd_iprintf(buffer, "Rate: ");
		switch (status[3] & IEC958_AES3_CON_FS) {
		case IEC958_AES3_CON_FS_44100:
			snd_iprintf(buffer, "44100 Hz\n");
			break;
		case IEC958_AES3_CON_FS_48000:
			snd_iprintf(buffer, "48000 Hz\n");
			break;
		case IEC958_AES3_CON_FS_32000:
			snd_iprintf(buffer, "32000 Hz\n");
			break;
		default:
			snd_iprintf(buffer, "unknown\n");
			break;
		}
		snd_iprintf(buffer, "Copyright: ");
		if (status[0] & IEC958_AES0_CON_NOT_COPYRIGHT) {
			snd_iprintf(buffer, "permitted\n");
		} else {
			snd_iprintf(buffer, "protected\n");
		}
		snd_iprintf(buffer, "Emphasis: ");
		if ((status[0] & IEC958_AES0_CON_EMPHASIS) != IEC958_AES0_CON_EMPHASIS_5015) {
			snd_iprintf(buffer, "none\n");
		} else {
			snd_iprintf(buffer, "50/15us\n");
		}
		snd_iprintf(buffer, "Category: ");
		for (i = 0; i < ARRAY_SIZE(snd_ca0106_con_category); i++) {
			if ((status[1] & IEC958_AES1_CON_CATEGORY) == snd_ca0106_con_category[i].val) {
				snd_iprintf(buffer, "%s\n", snd_ca0106_con_category[i].name);
				break;
			}
		}
		if (i >= ARRAY_SIZE(snd_ca0106_con_category)) {
			snd_iprintf(buffer, "unknown 0x%x\n", status[1] & IEC958_AES1_CON_CATEGORY);
		}
		snd_iprintf(buffer, "Original: ");
		if (status[1] & IEC958_AES1_CON_ORIGINAL) {
			snd_iprintf(buffer, "original\n");
		} else {
			snd_iprintf(buffer, "1st generation\n");
		}
		snd_iprintf(buffer, "Clock: ");
		switch (status[3] & IEC958_AES3_CON_CLOCK) {
		case IEC958_AES3_CON_CLOCK_1000PPM:
			snd_iprintf(buffer, "1000 ppm\n");
			break;
		case IEC958_AES3_CON_CLOCK_50PPM:
			snd_iprintf(buffer, "50 ppm\n");
			break;
		case IEC958_AES3_CON_CLOCK_VARIABLE:

Annotation

Implementation Notes