1998/0317/port/devaudio.c (diff list | history)

1997/0408/sys/src/9/port/devaudio.c:120,125 – 1998/0317/sys/src/9/port/devaudio.c:120,128 (short | long | prev | next)
1995/0214		int clri16; int clri401;
1996/1024		int dma;
1998/0317		void (*startdma)(void); void (*intr)(void);
1995/0214		} blaster;
1995/0119		static void swab(uchar*);
1997/0408/sys/src/9/port/devaudio.c:140,146 – 1998/0317/sys/src/9/port/devaudio.c:143,149
1995/0119		return 0; } }
1997/0327		/* print("#A: sbcmd (#%.2x) timeout\n", val); /**/
1998/0317		/* print("#A: sbcmd (0x%.2x) timeout\n", val); /**/
1995/0119		return 1; }
1997/0408/sys/src/9/port/devaudio.c:156,164 – 1998/0317/sys/src/9/port/devaudio.c:159,185
1995/0119		} }
1997/0327		/* print("#A: sbread did not respond\n"); /**/
1995/0119		return 0xbb;
1998/0317		return -1;
1995/0119		}
1998/0317		static int ess1688w(int reg, int val) { if(sbcmd(reg) || sbcmd(val)) return 1; return 0; } static int ess1688r(int reg) { if(sbcmd(0xC0) || sbcmd(reg)) return -1; return sbread(); }
1995/0119		static int mxcmd(int addr, int val) {
1997/0408/sys/src/9/port/devaudio.c:321,331 – 1998/0317/sys/src/9/port/devaudio.c:342,352
1995/0119		b = audio.current; if(audio.amode == Aread) { if(b) /* shouldnt happen */
1998/0317		if(b) /* shouldn't happen */
1995/0119		putbuf(&audio.full, b); b = getbuf(&audio.empty); } else { if(b) /* shouldnt happen */
1998/0317		if(b) /* shouldn't happen */
1995/0119		putbuf(&audio.empty, b); b = getbuf(&audio.full); }
1997/0408/sys/src/9/port/devaudio.c:333,340 – 1998/0317/sys/src/9/port/devaudio.c:354,363
1995/0119		if(b == 0) goto shutdown;
1996/1024		dmasetup(blaster.dma, b->virt, Bufsize, audio.amode == Aread);
1995/0119		return;
1998/0317		if(dmasetup(blaster.dma, b->virt, Bufsize, audio.amode == Aread) >= 0) return; print("#A: dmasetup fail\n"); putbuf(&audio.empty, b);
1995/0119		shutdown:
1996/1024		dmaend(blaster.dma);
1997/0408/sys/src/9/port/devaudio.c:349,355 – 1998/0317/sys/src/9/port/devaudio.c:372,378
1995/0119		* start first dma */ static void startdma(void)
1998/0317		sb16startdma(void)
1995/0119		{ ulong count;
1995/0221		int speed;
1997/0408/sys/src/9/port/devaudio.c:380,385 – 1998/0317/sys/src/9/port/devaudio.c:403,499
1995/0214		iunlock(&blaster);
1995/0119		}
1998/0317		static int ess1688reset(void) { int i; outb(blaster.reset, 3); delay(1); /* >3 υs */ outb(blaster.reset, 0); delay(1); i = sbread(); if(i != 0xAA) { print("#A: no response 0x%.2x\n", i); return 1; } if(sbcmd(0xC6)){ /* extended mode */ print("#A: barf 3\n"); return 1; } return 0; } static void ess1688startdma(void) { ulong count; int speed, x; ilock(&blaster); dmaend(blaster.dma); if(audio.amode == Awrite) ess1688reset(); if(audio.amode == Aread) sbcmd(0xD3); /* speaker off */ /* * Set the speed. */ if(audio.amode == Aread) speed = audio.livol[Vspeed]; else speed = audio.lovol[Vspeed]; if(speed < 4000) speed = 4000; else if(speed > 48000) speed = 48000; if(speed > 22000) x = 0x80|(256-(795500+speed/2)/speed); else x = 128-(397700+speed/2)/speed; ess1688w(0xA1, x & 0xFF); speed = (speed * 9) / 20; x = 256 - 7160000 / (speed * 82); ess1688w(0xA2, x & 0xFF); if(audio.amode == Aread) ess1688w(0xB8, 0x0E); /* A/D, autoinit */ else ess1688w(0xB8, 0x04); /* D/A, autoinit */ x = ess1688r(0xA8) & ~0x03; ess1688w(0xA8, x|0x01); /* 2 channels */ ess1688w(0xB9, 2); /* demand mode, 4 bytes per request */ if(audio.amode == Awrite) ess1688w(0xB6, 0); ess1688w(0xB7, 0x71); ess1688w(0xB7, 0xBC); x = ess1688r(0xB1) & 0x0F; ess1688w(0xB1, x|0x50); x = ess1688r(0xB2) & 0x0F; ess1688w(0xB2, x|0x50); if(audio.amode == Awrite) sbcmd(0xD1); /* speaker on */ count = -Bufsize; ess1688w(0xA4, count & 0xFF); ess1688w(0xA5, (count>>8) & 0xFF); x = ess1688r(0xB8); ess1688w(0xB8, x|0x05); audio.active = 1; contindma(); iunlock(&blaster); }
1995/0119		/* * if audio is stopped, * start it up again.
1997/0408/sys/src/9/port/devaudio.c:388,398 – 1998/0317/sys/src/9/port/devaudio.c:502,512
1995/0119		pokeaudio(void) { if(!audio.active) startdma();
1998/0317		blaster.startdma();
1995/0119		} void audiosbintr(void)
1998/0317		static void sb16intr(void)
1995/0119		{ int stat, dummy;
1997/0408/sys/src/9/port/devaudio.c:417,427 – 1998/0317/sys/src/9/port/devaudio.c:531,570
1995/0119		} }
1998/0317		static void ess1688intr(void) { int dummy; if(audio.active){ ilock(&blaster); contindma(); dummy = inb(blaster.clri8); iunlock(&blaster); audio.intr = 1; wakeup(&audio.vous); USED(dummy); } else print("#A: unexpected ess1688 interrupt\n"); }
1995/0119		void
1998/0317		audiosbintr(void) { /* * Carrera interrupt interface. */ blaster.intr(); } static void
1995/0804		pcaudiosbintr(Ureg*, void*)
1995/0214		{
1997/0327		/* print("#A: audio interrupt\n"); /**/
1995/0214		audiosbintr();
1998/0317		/* * x86 interrupt interface. */ blaster.intr();
1995/0214		} void
1997/0408/sys/src/9/port/devaudio.c:498,503 – 1998/0317/sys/src/9/port/devaudio.c:641,708
1995/0119		} }
1998/0317		static int ess1688(ISAConf* sbconf) { int i, major, minor; /* * Try for ESS1688. */ sbcmd(0xE7); /* get version */ major = sbread(); minor = sbread(); if(major != 0x68 || minor != 0x8B){ print("#A: model 0x%.2x 0x%.2x; not ESS1688 compatible\n", major, minor); return 1; } ess1688reset(); switch(sbconf->irq){ case 2: case 9: i = 0x50|(0<<2); break; case 5: i = 0x50|(1<<2); break; case 7: i = 0x50|(2<<2); break; case 10: i = 0x50|(3<<2); break; default: print("#A: bad ESS1688 irq %d\n", sbconf->irq); return 1; } ess1688w(0xB1, i); switch(sbconf->dma){ case 0: i = 0x50|(1<<2); break; case 1: i = 0xF0|(2<<2); break; case 3: i = 0x50|(3<<2); break; default: print("#A: bad ESS1688 dma %d\n", sbconf->dma); return 1; } ess1688w(0xB2, i); ess1688reset(); blaster.startdma = ess1688startdma; blaster.intr = ess1688intr; return 0; }
1997/0327		static void
1995/0119		audioinit(void) {
1997/0408/sys/src/9/port/devaudio.c:509,515 – 1998/0317/sys/src/9/port/devaudio.c:714,720
1995/0214		sbconf.irq = 7; if(isaconfig("audio", 0, &sbconf) == 0) return; if(strcmp(sbconf.type, "sb16") != 0)
1998/0317		if(cistrcmp(sbconf.type, "sb16") != 0 && cistrcmp(sbconf.type, "ess1688") != 0)
1995/0214		return; switch(sbconf.port){ case 0x220:
1997/0408/sys/src/9/port/devaudio.c:544,549 – 1998/0317/sys/src/9/port/devaudio.c:749,757
1995/0214		blaster.clri401 = sbconf.port + 0x100;
1997/0327		blaster.dma = sbconf.dma;
1995/0214
1998/0317		blaster.startdma = sb16startdma; blaster.intr = sb16intr;
1996/1024		seteisadma(blaster.dma, audiodmaintr);
1995/0214		setvec(Int0vec+sbconf.irq, pcaudiosbintr, 0);
1995/0119
1997/0408/sys/src/9/port/devaudio.c:566,574 – 1998/0317/sys/src/9/port/devaudio.c:774,787
1995/0119		audio.minor = sbread(); if(audio.major != 4) {
1997/0327		print("#A: model #%.2x #%.2x; not SB 16\n", audio.major, audio.minor);
1995/0119		return;
1998/0317		if(audio.major != 3 || audio.minor != 1 || ess1688(&sbconf)){ print("#A: model 0x%.2x 0x%.2x; not SB 16 compatible\n", audio.major, audio.minor); return; } audio.major = 4;
1995/0119		}
1998/0317
1995/0119		/* * initialize the mixer */