sound/pci/emu10k1/irq.c

Source file repositories/reference/linux-study-clean/sound/pci/emu10k1/irq.c

File Facts

System
Linux kernel
Corpus path
sound/pci/emu10k1/irq.c
Extension
.c
Size
4842 bytes
Lines
163
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

if ((status & 0xffffffff) == 0xffffffff) {
			dev_info(emu->card->dev,
				 "Suspected sound card removal\n");
			break;
		}
		if (++timeout == 1000) {
			dev_info(emu->card->dev, "emu10k1 irq routine failure\n");
			break;
		}
		orig_status = status;
		if (status & IPR_PCIERROR) {
			dev_err(emu->card->dev, "interrupt: PCI error\n");
			snd_emu10k1_intr_disable(emu, INTE_PCIERRORENABLE);
			status &= ~IPR_PCIERROR;
		}
		if (status & (IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE)) {
			if (emu->hwvol_interrupt)
				emu->hwvol_interrupt(emu, status);
			else
				snd_emu10k1_intr_disable(emu, INTE_VOLINCRENABLE|INTE_VOLDECRENABLE|INTE_MUTEENABLE);
			status &= ~(IPR_VOLINCR|IPR_VOLDECR|IPR_MUTE);
		}
		if (status & IPR_CHANNELLOOP) {
			struct snd_emu10k1_voice *pvoice;
			int voice;
			int voice_max = status & IPR_CHANNELNUMBERMASK;
			u32 val;

			val = snd_emu10k1_ptr_read(emu, CLIPL, 0);
			pvoice = emu->voices;
			for (voice = 0; voice <= voice_max; voice++) {
				if (voice == 0x20)
					val = snd_emu10k1_ptr_read(emu, CLIPH, 0);
				if (val & 1) {
					if (pvoice->use && pvoice->interrupt != NULL) {
						pvoice->interrupt(emu, pvoice);
						snd_emu10k1_voice_intr_ack(emu, voice);
					} else {
						snd_emu10k1_voice_intr_disable(emu, voice);
					}
				}
				val >>= 1;
				pvoice++;
			}
			val = snd_emu10k1_ptr_read(emu, HLIPL, 0);
			pvoice = emu->voices;
			for (voice = 0; voice <= voice_max; voice++) {
				if (voice == 0x20)
					val = snd_emu10k1_ptr_read(emu, HLIPH, 0);
				if (val & 1) {
					if (pvoice->use && pvoice->interrupt != NULL) {
						pvoice->interrupt(emu, pvoice);
						snd_emu10k1_voice_half_loop_intr_ack(emu, voice);
					} else {
						snd_emu10k1_voice_half_loop_intr_disable(emu, voice);
					}
				}
				val >>= 1;
				pvoice++;
			}
			status &= ~(IPR_CHANNELLOOP | IPR_CHANNELNUMBERMASK);
		}
		if (status & (IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL)) {
			if (emu->capture_interrupt)
				emu->capture_interrupt(emu, status);
			else
				snd_emu10k1_intr_disable(emu, INTE_ADCBUFENABLE);
			status &= ~(IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL);
		}
		if (status & (IPR_MICBUFFULL|IPR_MICBUFHALFFULL)) {
			if (emu->capture_mic_interrupt)
				emu->capture_mic_interrupt(emu, status);
			else
				snd_emu10k1_intr_disable(emu, INTE_MICBUFENABLE);
			status &= ~(IPR_MICBUFFULL|IPR_MICBUFHALFFULL);
		}
		if (status & (IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL)) {
			if (emu->capture_efx_interrupt)
				emu->capture_efx_interrupt(emu, status);
			else
				snd_emu10k1_intr_disable(emu, INTE_EFXBUFENABLE);
			status &= ~(IPR_EFXBUFFULL|IPR_EFXBUFHALFFULL);
		}
		if (status & (IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY)) {
			if (emu->midi.interrupt)
				emu->midi.interrupt(emu, status);
			else
				snd_emu10k1_intr_disable(emu, INTE_MIDITXENABLE|INTE_MIDIRXENABLE);
			status &= ~(IPR_MIDITRANSBUFEMPTY|IPR_MIDIRECVBUFEMPTY);
		}

Annotation

Implementation Notes