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1.1 root 1: /*
2: * Copyright (c) 1982, 1990 The Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
1.1.1.2 ! root 33: * from: @(#)ppi.c 7.3 (Berkeley) 12/16/90
! 34: * ppi.c,v 1.2 1993/05/22 07:56:41 cgd Exp
1.1 root 35: */
36:
37: /*
38: * Printer/Plotter HPIB interface
39: */
40:
41: #include "ppi.h"
42: #if NPPI > 0
43:
44: #include "sys/param.h"
45: #include "sys/errno.h"
46: #include "sys/uio.h"
47: #include "sys/malloc.h"
48:
49: #include "device.h"
50: #include "ppiioctl.h"
51:
52: int ppiattach(), ppistart(), ppitimo();
53: struct driver ppidriver = {
54: ppiattach, "ppi", ppistart,
55: };
56:
57: struct ppi_softc {
58: int sc_flags;
59: struct devqueue sc_dq;
60: struct hp_device *sc_hd;
61: struct ppiparam sc_param;
62: #define sc_burst sc_param.burst
63: #define sc_timo sc_param.timo
64: #define sc_delay sc_param.delay
65: int sc_sec;
66: } ppi_softc[NPPI];
67:
68: /* sc_flags values */
69: #define PPIF_ALIVE 0x01
70: #define PPIF_OPEN 0x02
71: #define PPIF_UIO 0x04
72: #define PPIF_TIMO 0x08
73: #define PPIF_DELAY 0x10
74:
75: #define UNIT(x) minor(x)
76:
77: #ifdef DEBUG
78: int ppidebug = 0x80;
79: #define PDB_FOLLOW 0x01
80: #define PDB_IO 0x02
81: #define PDB_NOCHECK 0x80
82: #endif
83:
84: ppiattach(hd)
85: register struct hp_device *hd;
86: {
87: register struct ppi_softc *sc = &ppi_softc[hd->hp_unit];
88:
89: #ifdef DEBUG
90: if ((ppidebug & PDB_NOCHECK) == 0)
91: #endif
92: /*
93: * XXX: the printer/plotter doesn't seem to really return
94: * an ID but this will at least prevent us from mistaking
95: * a cs80 disk or tape for a ppi device.
96: */
97: if (hpibid(hd->hp_ctlr, hd->hp_slave) & 0x200)
98: return(0);
99: sc->sc_flags = PPIF_ALIVE;
100: sc->sc_dq.dq_ctlr = hd->hp_ctlr;
101: sc->sc_dq.dq_unit = hd->hp_unit;
102: sc->sc_dq.dq_slave = hd->hp_slave;
103: sc->sc_dq.dq_driver = &ppidriver;
104: sc->sc_hd = hd;
105: return(1);
106: }
107:
108: ppiopen(dev, flags)
109: dev_t dev;
110: {
111: register int unit = UNIT(dev);
112: register struct ppi_softc *sc = &ppi_softc[unit];
113:
114: if (unit >= NPPI || (sc->sc_flags & PPIF_ALIVE) == 0)
115: return(ENXIO);
116: #ifdef DEBUG
117: if (ppidebug & PDB_FOLLOW)
118: printf("ppiopen(%x, %x): flags %x\n",
119: dev, flags, sc->sc_flags);
120: #endif
121: if (sc->sc_flags & PPIF_OPEN)
122: return(EBUSY);
123: sc->sc_flags |= PPIF_OPEN;
124: sc->sc_burst = PPI_BURST;
125: sc->sc_timo = ppimstohz(PPI_TIMO);
126: sc->sc_delay = ppimstohz(PPI_DELAY);
127: sc->sc_sec = -1;
128: return(0);
129: }
130:
131: ppiclose(dev, flags)
132: dev_t dev;
133: {
134: register int unit = UNIT(dev);
135: register struct ppi_softc *sc = &ppi_softc[unit];
136:
137: #ifdef DEBUG
138: if (ppidebug & PDB_FOLLOW)
139: printf("ppiclose(%x, %x): flags %x\n",
140: dev, flags, sc->sc_flags);
141: #endif
142: sc->sc_flags &= ~PPIF_OPEN;
143: return(0);
144: }
145:
146: ppistart(unit)
147: int unit;
148: {
149: #ifdef DEBUG
150: if (ppidebug & PDB_FOLLOW)
151: printf("ppistart(%x)\n", unit);
152: #endif
153: ppi_softc[unit].sc_flags &= ~PPIF_DELAY;
154: wakeup(&ppi_softc[unit]);
155: }
156:
157: ppitimo(unit)
158: int unit;
159: {
160: #ifdef DEBUG
161: if (ppidebug & PDB_FOLLOW)
162: printf("ppitimo(%x)\n", unit);
163: #endif
164: ppi_softc[unit].sc_flags &= ~(PPIF_UIO|PPIF_TIMO);
165: wakeup(&ppi_softc[unit]);
166: }
167:
168: ppiread(dev, uio)
169: dev_t dev;
170: struct uio *uio;
171: {
172:
173: #ifdef DEBUG
174: if (ppidebug & PDB_FOLLOW)
175: printf("ppiread(%x, %x)\n", dev, uio);
176: #endif
177: return (ppirw(dev, uio));
178: }
179:
180: ppiwrite(dev, uio)
181: dev_t dev;
182: struct uio *uio;
183: {
184:
185: #ifdef DEBUG
186: if (ppidebug & PDB_FOLLOW)
187: printf("ppiwrite(%x, %x)\n", dev, uio);
188: #endif
189: return (ppirw(dev, uio));
190: }
191:
192: ppirw(dev, uio)
193: dev_t dev;
194: register struct uio *uio;
195: {
196: int unit = UNIT(dev);
197: register struct ppi_softc *sc = &ppi_softc[unit];
198: register int s, len, cnt;
199: register char *cp;
200: int error = 0, gotdata = 0;
201: int buflen;
202: char *buf;
203:
204: if (uio->uio_resid == 0)
205: return(0);
206:
207: #ifdef DEBUG
208: if (ppidebug & (PDB_FOLLOW|PDB_IO))
209: printf("ppirw(%x, %x, %c): burst %d, timo %d, resid %x\n",
210: dev, uio, uio->uio_rw == UIO_READ ? 'R' : 'W',
211: sc->sc_burst, sc->sc_timo, uio->uio_resid);
212: #endif
213: buflen = MIN(sc->sc_burst, uio->uio_resid);
214: buf = (char *)malloc(buflen, M_DEVBUF, M_WAITOK);
215: sc->sc_flags |= PPIF_UIO;
216: if (sc->sc_timo > 0) {
217: sc->sc_flags |= PPIF_TIMO;
218: timeout(ppitimo, unit, sc->sc_timo);
219: }
220: while (uio->uio_resid > 0) {
221: len = MIN(buflen, uio->uio_resid);
222: cp = buf;
223: if (uio->uio_rw == UIO_WRITE) {
224: error = uiomove(cp, len, uio);
225: if (error)
226: break;
227: }
228: again:
229: s = splbio();
230: if ((sc->sc_flags & PPIF_UIO) && hpibreq(&sc->sc_dq) == 0)
231: sleep(sc, PRIBIO+1);
232: /*
233: * Check if we timed out during sleep or uiomove
234: */
235: (void) splsoftclock();
236: if ((sc->sc_flags & PPIF_UIO) == 0) {
237: #ifdef DEBUG
238: if (ppidebug & PDB_IO)
239: printf("ppirw: uiomove/sleep timo, flags %x\n",
240: sc->sc_flags);
241: #endif
242: if (sc->sc_flags & PPIF_TIMO) {
243: untimeout(ppitimo, unit);
244: sc->sc_flags &= ~PPIF_TIMO;
245: }
246: splx(s);
247: break;
248: }
249: splx(s);
250: /*
251: * Perform the operation
252: */
253: if (uio->uio_rw == UIO_WRITE)
254: cnt = hpibsend(sc->sc_hd->hp_ctlr, sc->sc_hd->hp_slave,
255: sc->sc_sec, cp, len);
256: else
257: cnt = hpibrecv(sc->sc_hd->hp_ctlr, sc->sc_hd->hp_slave,
258: sc->sc_sec, cp, len);
259: s = splbio();
260: hpibfree(&sc->sc_dq);
261: #ifdef DEBUG
262: if (ppidebug & PDB_IO)
263: printf("ppirw: %s(%d, %d, %x, %x, %d) -> %d\n",
264: uio->uio_rw == UIO_READ ? "recv" : "send",
265: sc->sc_hd->hp_ctlr, sc->sc_hd->hp_slave,
266: sc->sc_sec, cp, len, cnt);
267: #endif
268: splx(s);
269: if (uio->uio_rw == UIO_READ) {
270: if (cnt) {
271: error = uiomove(cp, cnt, uio);
272: if (error)
273: break;
274: gotdata++;
275: }
276: /*
277: * Didn't get anything this time, but did in the past.
278: * Consider us done.
279: */
280: else if (gotdata)
281: break;
282: }
283: s = splsoftclock();
284: /*
285: * Operation timeout (or non-blocking), quit now.
286: */
287: if ((sc->sc_flags & PPIF_UIO) == 0) {
288: #ifdef DEBUG
289: if (ppidebug & PDB_IO)
290: printf("ppirw: timeout/done\n");
291: #endif
292: splx(s);
293: break;
294: }
295: /*
296: * Implement inter-read delay
297: */
298: if (sc->sc_delay > 0) {
299: sc->sc_flags |= PPIF_DELAY;
300: timeout(ppistart, unit, sc->sc_delay);
301: error = tsleep(sc, PCATCH|PZERO+1, "hpib", 0);
302: if (error) {
303: splx(s);
304: break;
305: }
306: }
307: splx(s);
308: /*
309: * Must not call uiomove again til we've used all data
310: * that we already grabbed.
311: */
312: if (uio->uio_rw == UIO_WRITE && cnt != len) {
313: cp += cnt;
314: len -= cnt;
315: cnt = 0;
316: goto again;
317: }
318: }
319: s = splsoftclock();
320: if (sc->sc_flags & PPIF_TIMO) {
321: untimeout(ppitimo, unit);
322: sc->sc_flags &= ~PPIF_TIMO;
323: }
324: if (sc->sc_flags & PPIF_DELAY) {
325: untimeout(ppistart, unit);
326: sc->sc_flags &= ~PPIF_DELAY;
327: }
328: splx(s);
329: /*
330: * Adjust for those chars that we uiomove'ed but never wrote
331: */
332: if (uio->uio_rw == UIO_WRITE && cnt != len) {
333: uio->uio_resid += (len - cnt);
334: #ifdef DEBUG
335: if (ppidebug & PDB_IO)
336: printf("ppirw: short write, adjust by %d\n",
337: len-cnt);
338: #endif
339: }
340: free(buf, M_DEVBUF);
341: #ifdef DEBUG
342: if (ppidebug & (PDB_FOLLOW|PDB_IO))
343: printf("ppirw: return %d, resid %d\n", error, uio->uio_resid);
344: #endif
345: return (error);
346: }
347:
348: ppiioctl(dev, cmd, data, flag)
349: dev_t dev;
350: int cmd;
351: caddr_t data;
352: int flag;
353: {
354: struct ppi_softc *sc = &ppi_softc[UNIT(dev)];
355: struct ppiparam *pp, *upp;
356: int error = 0;
357:
358: switch (cmd) {
359: case PPIIOCGPARAM:
360: pp = &sc->sc_param;
361: upp = (struct ppiparam *)data;
362: upp->burst = pp->burst;
363: upp->timo = ppihztoms(pp->timo);
364: upp->delay = ppihztoms(pp->delay);
365: break;
366: case PPIIOCSPARAM:
367: pp = &sc->sc_param;
368: upp = (struct ppiparam *)data;
369: if (upp->burst < PPI_BURST_MIN || upp->burst > PPI_BURST_MAX ||
370: upp->delay < PPI_DELAY_MIN || upp->delay > PPI_DELAY_MAX)
371: return(EINVAL);
372: pp->burst = upp->burst;
373: pp->timo = ppimstohz(upp->timo);
374: pp->delay = ppimstohz(upp->delay);
375: break;
376: case PPIIOCSSEC:
377: sc->sc_sec = *(int *)data;
378: break;
379: default:
380: return(EINVAL);
381: }
382: return (error);
383: }
384:
385: ppihztoms(h)
386: int h;
387: {
388: extern int hz;
389: register int m = h;
390:
391: if (m > 0)
392: m = m * 1000 / hz;
393: return(m);
394: }
395:
396: ppimstohz(m)
397: int m;
398: {
399: extern int hz;
400: register int h = m;
401:
402: if (h > 0) {
403: h = h * hz / 1000;
404: if (h == 0)
405: h = 1000 / hz;
406: }
407: return(h);
408: }
409: #endif
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