Import sources from 2011-03-30 iso image

1 files changed, 180 insertions, 0 deletions

diff --git a/sys/src/9/omap/devdss.c b/sys/src/9/omap/devdss.c
new file mode 100755
index 000000000..17ad06abd
--- /dev/null
+++ b/sys/src/9/omap/devdss.c
@@ -0,0 +1,180 @@
+/*
+ * omap35 display subsystem (dss) device interface to screen.c.
+ * implements #v/vgactl
+ */
+#include "u.h"
+#include "../port/lib.h"
+#include "mem.h"
+#include "dat.h"
+#include "fns.h"
+#include "io.h"
+#include "ureg.h"
+#include "../port/error.h"
+
+#define	Image	IMAGE
+#include <draw.h>
+#include <memdraw.h>
+#include <cursor.h>
+#include "screen.h"
+// #include "gamma.h"
+
+enum {
+	Qdir,
+	Qdss,
+};
+
+extern OScreen oscreen;
+extern Settings settings[];
+extern Omap3fb *framebuf;
+
+static QLock dsslck;
+static Dirtab dsstab[] = {
+	".",		{Qdir, 0, QTDIR},	0,	0555|DMDIR,
+	"vgactl",	{Qdss, 0},		0,	0666,
+};
+
+static Chan*
+screenattach(char *spec)
+{
+	return devattach('v', spec);
+}
+
+static Walkqid*
+screenwalk(Chan *c, Chan *nc, char **name, int nname)
+{
+	return devwalk(c, nc, name, nname, dsstab, nelem(dsstab), devgen);
+}
+
+static int
+screenstat(Chan *c, uchar *dp, int n)
+{
+	return devstat(c, dp, n, dsstab, nelem(dsstab), devgen);
+}
+
+static Chan*
+screenopen(Chan *c, int omode)
+{
+	if ((ulong)c->qid.path == Qdss) {
+		qlock(&dsslck);
+		oscreen.open = 1;
+		c->mode = openmode(omode);
+		c->flag |= COPEN;
+		c->offset = 0;
+	}
+	return c;
+}
+
+static void
+screenclose(Chan *c)
+{
+	if ((c->qid.type & QTDIR) == 0 && c->flag & COPEN)
+		if (c->qid.path == Qdss) {
+			oscreen.open = 0;
+			qunlock(&dsslck);
+		}
+}
+
+static ulong
+getchans(char *p)
+{
+	if (strncmp("x24" , p, 3) == 0)
+		return RGB24;		/* can't work yet, pixels are shorts */
+	else if (strncmp("x16", p, 3) == 0)
+		return RGB16;
+	else
+		return RGB16;
+}
+
+static long
+settingswrite(OScreen *scr, char *p)
+{
+	if (strncmp("800x600", p, 7) == 0) {
+		p += 7;
+		scr->settings = &settings[Res800x600];
+	} else if (strncmp("1024x768", p, 8) == 0) {
+		p += 8;
+		scr->settings = &settings[Res1024x768];
+	} else if (strncmp("1280x1024", p, 9) == 0) {
+		p += 9;
+		scr->settings = &settings[Res1280x1024];
+	} else
+		return -1;
+	scr->settings->chan = getchans(p);
+	return 1;
+}
+
+static long
+screenread(Chan *c, void *a, long n, vlong off)
+{
+	int len, depth;
+	char *p;
+	Settings *set;
+
+	switch ((ulong)c->qid.path) {
+	case Qdir:
+		return devdirread(c, a, n, dsstab, nelem(dsstab), devgen);
+	case Qdss:
+		set = oscreen.settings;
+		p = malloc(READSTR);
+		if(waserror()){
+			free(p);
+			nexterror();
+		}
+		if (set->chan == RGB16)
+			depth = 16;
+		else if (set->chan == RGB24)
+			depth = 24;
+		else
+			depth = 0;
+		len = snprint(p, READSTR, "size %dx%dx%d @ %d Hz\n"
+			"addr %#p size %ud\n", set->wid, set->ht, depth,
+			set->freq, framebuf, sizeof *framebuf);
+		USED(len);
+		n = readstr(off, a, n, p);
+		poperror();
+		free(p);
+		return n;
+	default:
+		error(Egreg);
+	}
+	return 0;
+}
+
+static long
+screenwrite(Chan *c, void *a, long n, vlong off)
+{
+	switch ((ulong)c->qid.path) {
+	case Qdss:
+		if(off)
+			error(Ebadarg);
+		n = settingswrite(&oscreen, a);
+		if (n < 0)
+			error(Ebadctl);
+		screeninit();
+		return n;
+	default:
+		error(Egreg);
+	}
+	return 0;
+}
+
+Dev dssdevtab = {
+	L'v',
+	"dss",
+
+	devreset,
+	devinit,
+	devshutdown,		// TODO add a shutdown to stop dma to monitor
+	screenattach,
+	screenwalk,
+	screenstat,
+	screenopen,
+	devcreate,
+	screenclose,
+	screenread,
+	devbread,
+	screenwrite,
+	devbwrite,
+	devremove,
+	devwstat,
+};