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- #include "u.h"
- #include "../port/lib.h"
- #include "mem.h"
- #include "dat.h"
- #include "fns.h"
- #include "../port/error.h"
- #include "io.h"
- #include "devlml.h"
- #define DBGREAD 0x01
- #define DBGWRIT 0x02
- #define DBGINTR 0x04
- #define DBGINTS 0x08
- int debug = 0;
- // Lml 22 driver
- enum{
- Qdir,
- Qctl0,
- Qjpg0,
- Qraw0,
- Qctl1,
- Qjpg1,
- Qraw1,
- };
- #define QID(q) ((ulong)(q).path)
- #define QIDLML(q) ((((ulong)(q).path)-1)>>1)
- static Dirtab lmldir[]={
- ".", {Qdir, 0, QTDIR}, 0, DMDIR|0555,
- "lml0ctl", {Qctl0}, 0, 0666,
- "lml0jpg", {Qjpg0}, 0, 0444,
- "lml0raw", {Qraw0}, 0, 0444,
- "lml1ctl", {Qctl1}, 0, 0666,
- "lml1jpg", {Qjpg1}, 0, 0444,
- "lml1raw", {Qraw1}, 0, 0444,
- };
- typedef struct LML LML;
- struct LML {
- // Hardware
- Pcidev * pcidev;
- ulong pciBaseAddr;
- // Allocated memory
- CodeData * codedata;
- // Software state
- ulong jpgframeno;
- int frameNo;
- Rendez sleepjpg;
- int jpgopens;
- } lmls[NLML];
- int nlml;
- static FrameHeader jpgheader = {
- MRK_SOI, MRK_APP3, (sizeof(FrameHeader)-4) << 8,
- { 'L', 'M', 'L', '\0'},
- -1, 0, 0, 0
- };
- #define writel(v, a) *(ulong *)(a) = (v)
- #define readl(a) *(ulong*)(a)
- static int
- getbuffer(void *x){
- static last = NBUF-1;
- int l = last;
- LML *lml;
- lml = x;
- for (;;) {
- last = (last+1) % NBUF;
- if (lml->codedata->statCom[last] & STAT_BIT)
- return last + 1;
- if (last == l)
- return 0;
- }
- return 0;
- }
- static long
- jpgread(LML *lml, void *va, long nbytes, vlong, int dosleep) {
- int bufno;
- FrameHeader *jpgheader;
-
- // reads should be of size 1 or sizeof(FrameHeader)
- // Frameno is the number of the buffer containing the data
- while ((bufno = getbuffer(lml)) == 0 && dosleep)
- sleep(&lml->sleepjpg, getbuffer, lml);
- if (--bufno < 0)
- return 0;
- jpgheader = (FrameHeader*)(lml->codedata->frag[bufno].hdr+2);
- if (nbytes == sizeof(FrameHeader)) {
- memmove(va, jpgheader, sizeof(FrameHeader));
- return sizeof(FrameHeader);
- }
- if (nbytes == 1) {
- *(char *)va = bufno;
- return 1;
- }
- return 0;
- }
- static void lmlintr(Ureg *, void *);
- static void
- prepbuf(LML *lml) {
- int i;
- for (i = 0; i < NBUF; i++) {
- lml->codedata->statCom[i] = PADDR(&(lml->codedata->fragdesc[i]));
- lml->codedata->fragdesc[i].addr = PADDR(lml->codedata->frag[i].fb);
- // Length is in double words, in position 1..20
- lml->codedata->fragdesc[i].leng = (FRAGSIZE >> 1) | FRAGM_FINAL_B;
- memmove(lml->codedata->frag[i].hdr+2, &jpgheader, sizeof(FrameHeader)-2);
- }
- }
- static void
- lmlreset(void)
- {
- Physseg segbuf;
- ulong regpa;
- ISAConf isa;
- char name[32];
- Pcidev *pcidev;
- LML *lml;
- pcidev = nil;
-
- for (nlml = 0; nlml < NLML && (pcidev = pcimatch(pcidev, VENDOR_ZORAN, ZORAN_36067)); nlml++){
- if(isaconfig("lml", nlml, &isa) == 0) {
- if (debug) print("lml %d not in plan9.ini\n", nlml);
- break;
- }
- lml = &lmls[nlml];
- lml->pcidev = pcidev;
- lml->codedata = (CodeData*)(((ulong)xalloc(Codedatasize+ BY2PG) + BY2PG-1) & ~(BY2PG-1));
- if (lml->codedata == nil) {
- print("devlml: xalloc(%ux, %ux, 0)\n", Codedatasize, BY2PG);
- return;
- }
- print("Installing Motion JPEG driver %s, irq %d\n", MJPG_VERSION, pcidev->intl);
- print("MJPG buffer at 0x%.8lux, size 0x%.8ux\n", lml->codedata, Codedatasize);
- // Get access to DMA memory buffer
- lml->codedata->pamjpg = PADDR(lml->codedata->statCom);
- prepbuf(lml);
- print("zr36067 found at 0x%.8lux", pcidev->mem[0].bar & ~0x0F);
- regpa = upamalloc(pcidev->mem[0].bar & ~0x0F, pcidev->mem[0].size, 0);
- if (regpa == 0) {
- print("lml: failed to map registers\n");
- return;
- }
- lml->pciBaseAddr = (ulong)KADDR(regpa);
- print(", mapped at 0x%.8lux\n", lml->pciBaseAddr);
- memset(&segbuf, 0, sizeof(segbuf));
- segbuf.attr = SG_PHYSICAL;
- sprint(name, "lml%d.mjpg", nlml);
- kstrdup(&segbuf.name, name);
- segbuf.pa = PADDR(lml->codedata);
- segbuf.size = Codedatasize;
- if (addphysseg(&segbuf) == -1) {
- print("lml: physsegment: %s\n", name);
- return;
- }
- memset(&segbuf, 0, sizeof(segbuf));
- segbuf.attr = SG_PHYSICAL;
- sprint(name, "lml%d.regs", nlml);
- kstrdup(&segbuf.name, name);
- segbuf.pa = (ulong)regpa;
- segbuf.size = pcidev->mem[0].size;
- if (addphysseg(&segbuf) == -1) {
- print("lml: physsegment: %s\n", name);
- return;
- }
- // Interrupt handler
- intrenable(pcidev->intl, lmlintr, lml, pcidev->tbdf, "lml");
- }
- return;
- }
- static Chan*
- lmlattach(char *spec)
- {
- return devattach('V', spec);
- }
- static Walkqid*
- lmlwalk(Chan *c, Chan *nc, char **name, int nname)
- {
- return devwalk(c, nc, name, nname, lmldir, nelem(lmldir), devgen);
- }
- static int
- lmlstat(Chan *c, uchar *db, int n)
- {
- return devstat(c, db, n, lmldir, nelem(lmldir), devgen);
- }
- static Chan*
- lmlopen(Chan *c, int omode) {
- int i;
- LML *lml;
- if (omode != OREAD)
- error(Eperm);
- c->aux = 0;
- i = 0;
- switch((ulong)c->qid.path){
- case Qctl1:
- i++;
- case Qctl0:
- if (i >= nlml)
- error(Eio);
- break;
- case Qjpg1:
- case Qraw1:
- i++;
- case Qjpg0:
- case Qraw0:
- // allow one open
- if (i >= nlml)
- error(Eio);
- lml = lmls+i;
- if (lml->jpgopens)
- error(Einuse);
- lml->jpgopens = 1;
- lml->jpgframeno = 0;
- prepbuf(lml);
- break;
- }
- return devopen(c, omode, lmldir, nelem(lmldir), devgen);
- }
- static void
- lmlclose(Chan *c) {
- int i;
- i = 0;
- switch((ulong)c->qid.path){
- case Qjpg1:
- case Qraw1:
- i++;
- case Qjpg0:
- case Qraw0:
- lmls[i].jpgopens = 0;
- break;
- }
- }
- static long
- lmlread(Chan *c, void *va, long n, vlong voff) {
- int i;
- uchar *buf = va;
- long off = voff;
- LML *lml;
- static char lmlinfo[1024];
- int len;
- i = 0;
- switch((ulong)c->qid.path){
- case Qdir:
- return devdirread(c, (char *)buf, n, lmldir, nelem(lmldir), devgen);
- case Qctl1:
- i++;
- case Qctl0:
- if (i >= nlml)
- error(Eio);
- lml = lmls+i;
- len = snprint(lmlinfo, sizeof lmlinfo, "lml%djpg lml%draw\nlml%d.regs 0x%lux 0x%ux\nlml%d.mjpg 0x%lux 0x%ux\n",
- i, i,
- i, lml->pcidev->mem[0].bar & ~0x0F, lml->pcidev->mem[0].size,
- i, PADDR(lml->codedata), Codedatasize);
- if (voff > len)
- return 0;
- if (n > len - voff)
- n = len - voff;
- memmove(va, lmlinfo+voff, n);
- return n;
- case Qjpg1:
- i++;
- case Qjpg0:
- if (i >= nlml)
- error(Eio);
- return jpgread(lmls+i, buf, n, off, 1);
- case Qraw1:
- i++;
- case Qraw0:
- if (i >= nlml)
- error(Eio);
- return jpgread(lmls+i, buf, n, off, 0);
- }
- }
- static long
- lmlwrite(Chan *, void *, long, vlong) {
- error(Eperm);
- return 0;
- }
- Dev lmldevtab = {
- 'V',
- "video",
- lmlreset,
- devinit,
- devshutdown,
- lmlattach,
- lmlwalk,
- lmlstat,
- lmlopen,
- devcreate,
- lmlclose,
- lmlread,
- devbread,
- lmlwrite,
- devbwrite,
- devremove,
- devwstat,
- };
- static void
- lmlintr(Ureg *, void *x) {
- FrameHeader *jpgheader;
- ulong fstart, fno, flags, statcom;
- LML *lml;
- lml = x;
- flags = readl(lml->pciBaseAddr+INTR_STAT);
- // Reset all interrupts from 067
- writel(0xff000000, lml->pciBaseAddr + INTR_STAT);
- if(flags & INTR_JPEGREP) {
- if(debug&(DBGINTR))
- print("MjpgDrv_intrHandler stat=0x%.8lux\n", flags);
- fstart = lml->jpgframeno & 0x00000003;
- for (;;) {
- lml->jpgframeno++;
- fno = lml->jpgframeno & 0x00000003;
- if (lml->codedata->statCom[fno] & STAT_BIT)
- break;
- if (fno == fstart) {
- if (debug & DBGINTR)
- print("Spurious lml jpg intr?\n");
- return;
- }
- }
- statcom = lml->codedata->statCom[fno];
- jpgheader = (FrameHeader *)(lml->codedata->frag[fno].hdr+2);
- jpgheader->frameNo = lml->jpgframeno;
- jpgheader->ftime = todget(nil);
- jpgheader->frameSize = (statcom & 0x00ffffff) >> 1;
- jpgheader->frameSeqNo = statcom >> 24;
- wakeup(&lml->sleepjpg);
- }
- return;
- }
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