ref: c3938067180ed707828cdbcd0b2d430a13323dd9
dir: /sys/src/9/omap/devdss.c/
/* * 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, };