2001/0502/bitsy/devuda1341.c (diff list | history)

2001/0501/sys/src/9/bitsy/devuda1341.c:19,25 – 2001/0502/sys/src/9/bitsy/devuda1341.c:19,25 (short | long | prev | next)
2000/1103		#include "io.h"
2000/1110		#include "sa1110dma.h"
2000/1103
2001/0501		static int debug = 2;
2001/0502		static int debug = 0;
2000/1113
2000/1103		/* * GPIO based L3 bus support.
2001/0501/sys/src/9/bitsy/devuda1341.c:139,153 – 2001/0502/sys/src/9/bitsy/devuda1341.c:139,153
2000/1103		{ QLock;
2000/1115		Lock ilock;
2000/1110		Rendez vous; Chan *chan; /* chan of open */ int dma; /* dma chan, alloc on open, free on close */ int bufinit; /* boolean, if buffers allocated */ Buf buf[Nbuf]; /* buffers and queues */
2001/0502		Rendez vous; Chan *chan; /* chan of open */ int dma; /* dma chan, alloc on open, free on close */ int bufinit; /* boolean, if buffers allocated */ Buf buf[Nbuf]; /* buffers and queues */
2000/1110		volatile Buf *current; /* next dma to finish */ volatile Buf *next; /* next candidate for dma */
2001/0502		volatile Buf *next; /* next candidate for dma */
2000/1110		volatile Buf *filling; /* buffer being filled */
2000/1118		/* just be be cute (and to have defines like linux, a real operating system) */
2001/0502		/* to have defines just like linux — there's a real operating system */
2000/1118		#define emptying filling
2000/1109		};
2000/1103
2001/0501/sys/src/9/bitsy/devuda1341.c:166,171 – 2001/0502/sys/src/9/bitsy/devuda1341.c:166,174
2000/1109		IOstate o;
2000/1103		} audio;
2001/0502		Buf zeroes; int zerodma; /* dma buffer used for sending zero */
2000/1116		static struct { ulong bytes;
2001/0501/sys/src/9/bitsy/devuda1341.c:173,178 – 2001/0502/sys/src/9/bitsy/devuda1341.c:176,182
2000/1116		ulong idledma; ulong faildma;
2000/1117		ulong samedma;
2001/0502		ulong empties;
2000/1116		} iostats;
2000/1103		static struct
2001/0501/sys/src/9/bitsy/devuda1341.c:183,196 – 2001/0502/sys/src/9/bitsy/devuda1341.c:187,200
2000/1103		int irval; } volumes[] = {
2000/1207		[Vaudio] {"audio", Fout|Fmono, 80, 80}, [Vmic] {"mic", Fin|Fmono, 0, 0}, [Vtreb] {"treb", Fout|Fmono, 50, 50}, [Vbass] {"bass", Fout|Fmono, 50, 50},
2001/0502		[Vaudio] {"audio", Fout|Fmono, 80, 80}, [Vmic] {"mic", Fin|Fmono, 0, 0}, [Vtreb] {"treb", Fout|Fmono, 50, 50}, [Vbass] {"bass", Fout|Fmono, 50, 50},
2000/1207		[Vspeed] {"speed", Fin|Fout|Fmono, Speed, Speed}, [Vfilter] {"filter", Fout|Fmono, 0, 0}, [Vinvert] {"invert", Fin|Fout|Fmono, 0, 0}, [Nvol] {0}
2001/0502		[Vfilter] {"filter", Fout|Fmono, 0, 0}, [Vinvert] {"invert", Fin|Fout|Fmono, 0, 0}, [Nvol] {0}
2000/1103		};
2001/0421		static void setreg(char *name, int val, int n);
2001/0501/sys/src/9/bitsy/devuda1341.c:397,404 – 2001/0502/sys/src/9/bitsy/devuda1341.c:401,415
2000/1118		for (i = 0; i < Nbuf; i++) {
2000/1109		b->buf[i].virt = xalloc(Bufsize);
2000/1118		b->buf[i].phys = PADDR(b->buf[i].virt);
2001/0502		memset(b->buf[i].virt, 0xAA, Bufsize);
2000/1118		}
2000/1109		b->bufinit = 1;
2001/0502		if (b == &audio.o) { zeroes.virt = xalloc(Bufsize); zeroes.phys = PADDR(b->buf[i].virt); memset(zeroes.virt, 0, Bufsize); }
2000/1109		};
2000/1103
2000/1109		static void
2001/0501/sys/src/9/bitsy/devuda1341.c:681,686 – 2001/0502/sys/src/9/bitsy/devuda1341.c:692,706
2000/1116
2000/1115		if (debug > 1) print("#A: sendaudio\n");
2000/1117		ilock(&s->ilock);
2001/0502		if ((audio.amode & Aread) && s->next == s->filling && dmaidle(s->dma)) { // send an empty buffer to provide an input clock zerodma |= dmastart(s->dma, zeroes.phys, Bufsize) & 0xff; if (zerodma == 0) if (debug) print("emptyfail\n"); iostats.empties++; iunlock(&s->ilock); return; }
2000/1117		while (s->next != s->filling) { assert(s->next->nbytes);
2000/1118		if ((n = dmastart(s->dma, s->next->phys, s->next->nbytes)) == 0) {
2001/0501/sys/src/9/bitsy/devuda1341.c:688,694 – 2001/0502/sys/src/9/bitsy/devuda1341.c:708,714
2000/1115		break; }
2000/1116		iostats.totaldma++;
2000/1117		switch (n) {
2001/0502		switch (n >> 8) {
2000/1117		case 1: iostats.idledma++; break;
2001/0501/sys/src/9/bitsy/devuda1341.c:724,730 – 2001/0502/sys/src/9/bitsy/devuda1341.c:744,750
2000/1118		break; } iostats.totaldma++; switch (n) {
2001/0502		switch (n >> 8) {
2000/1118		case 1: iostats.idledma++; break;
2001/0501/sys/src/9/bitsy/devuda1341.c:791,804 – 2001/0502/sys/src/9/bitsy/devuda1341.c:811,830
2000/1122		else iprint("-"); }
2000/1121		/* Only interrupt routine touches s->current */ s->current++; if (s->current == &s->buf[Nbuf]) s->current = &s->buf[0]; if (ndma > 0) { if (s == &audio.o)
2001/0502		if (s == &audio.i || (ndma & ~zerodma)) { /* A dma, not of a zero buffer completed, update current * Only interrupt routine touches s->current */ s->current->nbytes = (s == &audio.i)? Bufsize: 0; s->current++; if (s->current == &s->buf[Nbuf]) s->current = &s->buf[0]; } if (ndma) { if (s == &audio.o) { zerodma &= ~ndma;
2000/1116		sendaudio(s);
2000/1121		else if (s == &audio.i)
2001/0502		} else if (s == &audio.i)
2000/1118		recvaudio(s);
2000/1109		}
2000/1111		wakeup(&s->vous);
2001/0501/sys/src/9/bitsy/devuda1341.c:862,880 – 2001/0502/sys/src/9/bitsy/devuda1341.c:888,910
2000/1122		s->dma = dmaalloc(1, 0, 4, 2, SSPRecvDMA, Port4SSP, audiointr, (void*)s);
2000/1125		audio.amode |= Aread;
2000/1108		}
2000/1121		if (omode & Awrite) {
2000/1117		outenable();
2001/0502		if (omode & (Aread|Awrite) && (audio.amode & Awrite) == 0) {
2000/1117		s = &audio.o;
2000/1109		audio.amode |= Awrite;
2000/1117		if(s->bufinit == 0) bufinit(s); setempty(s); s->chan = c; s->dma = dmaalloc(0, 0, 4, 2, SSPXmitDMA, Port4SSP, audiointr, (void*)s);
2001/0502		} if (omode & Awrite) {
2000/1125		audio.amode |= Awrite;
2001/0502		outenable();
2000/1107		}
2000/1117		mxvolume();
2000/1115		qunlock(&audio);
2001/0502		if (audio.amode == Aread) sendaudio(&audio.o);
2000/1122		if (debug) print("open done\n");
2000/1107		break; }
2001/0501/sys/src/9/bitsy/devuda1341.c:905,913 – 2001/0502/sys/src/9/bitsy/devuda1341.c:935,962
2000/1115		if (debug > 1) print("#A: close\n");
2000/1107		if(c->flag & COPEN) { qlock(&audio); if(waserror()){ qunlock(&audio); nexterror();
2001/0502		if (audio.i.chan == c) { /* closing the read end */ audio.amode &= ~Aread; s = &audio.i; qlock(s); indisable(); setempty(s); dmafree(s->dma); qunlock(s); if ((audio.amode & Awrite) == 0) { s = &audio.o; qlock(s); while(waserror()) { dmawait(s->dma); if (dmaidle(s->dma)) break; } outdisable(); setempty(s); dmafree(s->dma); qunlock(s); }
2000/1107		}
2000/1110		if (audio.o.chan == c) {
2000/1118		/* closing the write end */
2001/0501/sys/src/9/bitsy/devuda1341.c:914,923 – 2001/0502/sys/src/9/bitsy/devuda1341.c:963,968
2000/1118		audio.amode &= ~Awrite;
2000/1117		s = &audio.o; qlock(s); if(waserror()){ qunlock(s); nexterror(); } if (s->filling->nbytes) { /* send remaining partial buffer */ s->filling++;
2001/0501/sys/src/9/bitsy/devuda1341.c:925,958 – 2001/0502/sys/src/9/bitsy/devuda1341.c:970,991
2000/1117		s->filling = &s->buf[0]; sendaudio(s);
2000/1110		}
2000/1117		dmawait(s->dma);
2001/0502		while(waserror()) { dmawait(s->dma); if (dmaidle(s->dma)) break; }
2000/1117		outdisable(); setempty(s); dmafree(s->dma);
2001/0502		if ((audio.amode & Aread) == 0) dmafree(s->dma);
2000/1117		qunlock(s); poperror();
2000/1110		} if (audio.i.chan == c) { /* closing the read end */ audio.amode &= ~Aread;
2000/1118		s = &audio.i; qlock(s); if(waserror()){ qunlock(s); nexterror(); }
2000/1117		indisable();
2000/1118		setempty(s); dmafree(s->dma); qunlock(s); poperror();
2000/1110		} if (audio.amode == 0) { /* turn audio off */
2000/1122		egpiobits(EGPIO_audio_ic_power | EGPIO_codec_reset, 0);
2000/1110		}
2000/1107		qunlock(&audio);
2000/1117		poperror();
2000/1130		if (debug) { print("total dmas: %lud\n", iostats.totaldma); print("dmas while idle: %lud\n", iostats.idledma);
2001/0501/sys/src/9/bitsy/devuda1341.c:1009,1018 – 2001/0502/sys/src/9/bitsy/devuda1341.c:1042,1050
2000/1118		sleep(&s->vous, audioqnotempty, s); } m = Bufsize - s->emptying->nbytes; if(m > n) m = n; memmove(p, s->emptying->virt + s->emptying->nbytes, m);
2001/0502		m = (s->emptying->nbytes > n)? n: s->emptying->nbytes; memmove(p, s->emptying->virt + Bufsize - s->emptying->nbytes, m);
2000/1118		s->emptying->nbytes -= m; n -= m;