vpo.c revision 109623 
1/*-
2 * Copyright (c) 1997, 1998, 1999 Nicolas Souchu
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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/dev/ppbus/vpo.c 109623 2003-01-21 08:56:16Z alfred $
27 */
28
29#include <sys/param.h>
30#include <sys/systm.h>
31#include <sys/module.h>
32#include <sys/bus.h>
33#include <sys/malloc.h>
34#include <sys/devicestat.h>	/* for struct devstat */
35
36
37#include <cam/cam.h>
38#include <cam/cam_ccb.h>
39#include <cam/cam_sim.h>
40#include <cam/cam_xpt_sim.h>
41#include <cam/cam_debug.h>
42#include <cam/cam_periph.h>
43
44#include <cam/scsi/scsi_all.h>
45#include <cam/scsi/scsi_message.h>
46#include <cam/scsi/scsi_da.h>
47
48#include <sys/kernel.h>
49
50#include "opt_vpo.h"
51
52#include <dev/ppbus/ppbconf.h>
53#include <dev/ppbus/vpoio.h>
54
55#include "ppbus_if.h"
56
57struct vpo_sense {
58	struct scsi_sense cmd;
59	unsigned int stat;
60	unsigned int count;
61};
62
63struct vpo_data {
64	unsigned short vpo_unit;
65
66	int vpo_stat;
67	int vpo_count;
68	int vpo_error;
69
70	int vpo_isplus;
71
72	struct cam_sim  *sim;
73
74	struct vpo_sense vpo_sense;
75
76	struct vpoio_data vpo_io;	/* interface to low level functions */
77};
78
79#define DEVTOSOFTC(dev) \
80	((struct vpo_data *)device_get_softc(dev))
81
82/* cam related functions */
83static void	vpo_action(struct cam_sim *sim, union ccb *ccb);
84static void	vpo_poll(struct cam_sim *sim);
85static void	vpo_cam_rescan_callback(struct cam_periph *periph,
86					union ccb *ccb);
87static void	vpo_cam_rescan(struct vpo_data *vpo);
88
89static void
90vpo_identify(driver_t *driver, device_t parent)
91{
92
93	BUS_ADD_CHILD(parent, 0, "vpo", -1);
94}
95
96/*
97 * vpo_probe()
98 */
99static int
100vpo_probe(device_t dev)
101{
102	struct vpo_data *vpo;
103	int error;
104
105	vpo = DEVTOSOFTC(dev);
106	bzero(vpo, sizeof(struct vpo_data));
107
108	/* vpo dependent initialisation */
109	vpo->vpo_unit = device_get_unit(dev);
110
111	/* low level probe */
112	vpoio_set_unit(&vpo->vpo_io, vpo->vpo_unit);
113
114	/* check ZIP before ZIP+ or imm_probe() will send controls to
115	 * the printer or whatelse connected to the port */
116	if ((error = vpoio_probe(dev, &vpo->vpo_io)) == 0) {
117		vpo->vpo_isplus = 0;
118		device_set_desc(dev,
119				"Iomega VPI0 Parallel to SCSI interface");
120	} else if ((error = imm_probe(dev, &vpo->vpo_io)) == 0) {
121		vpo->vpo_isplus = 1;
122		device_set_desc(dev,
123				"Iomega Matchmaker Parallel to SCSI interface");
124	} else {
125		return (error);
126	}
127
128	return (0);
129}
130
131/*
132 * vpo_attach()
133 */
134static int
135vpo_attach(device_t dev)
136{
137	struct vpo_data *vpo = DEVTOSOFTC(dev);
138	struct cam_devq *devq;
139	int error;
140
141	/* low level attachment */
142	if (vpo->vpo_isplus) {
143		if ((error = imm_attach(&vpo->vpo_io)))
144			return (error);
145	} else {
146		if ((error = vpoio_attach(&vpo->vpo_io)))
147			return (error);
148	}
149
150	/*
151	**	Now tell the generic SCSI layer
152	**	about our bus.
153	*/
154	devq = cam_simq_alloc(/*maxopenings*/1);
155	/* XXX What about low-level detach on error? */
156	if (devq == NULL)
157		return (ENXIO);
158
159	vpo->sim = cam_sim_alloc(vpo_action, vpo_poll, "vpo", vpo,
160				 device_get_unit(dev),
161				 /*untagged*/1, /*tagged*/0, devq);
162	if (vpo->sim == NULL) {
163		cam_simq_free(devq);
164		return (ENXIO);
165	}
166
167	if (xpt_bus_register(vpo->sim, /*bus*/0) != CAM_SUCCESS) {
168		cam_sim_free(vpo->sim, /*free_devq*/TRUE);
169		return (ENXIO);
170	}
171
172	/* all went ok */
173
174	vpo_cam_rescan(vpo);	/* have CAM rescan the bus */
175
176	return (0);
177}
178
179static void
180vpo_cam_rescan_callback(struct cam_periph *periph, union ccb *ccb)
181{
182        free(ccb, M_TEMP);
183}
184
185static void
186vpo_cam_rescan(struct vpo_data *vpo)
187{
188        struct cam_path *path;
189        union ccb *ccb = malloc(sizeof(union ccb), M_TEMP, M_ZERO);
190
191        if (xpt_create_path(&path, xpt_periph, cam_sim_path(vpo->sim), 0, 0)
192            != CAM_REQ_CMP) {
193		/* A failure is benign as the user can do a manual rescan */
194                return;
195	}
196
197        xpt_setup_ccb(&ccb->ccb_h, path, 5/*priority (low)*/);
198        ccb->ccb_h.func_code = XPT_SCAN_BUS;
199        ccb->ccb_h.cbfcnp = vpo_cam_rescan_callback;
200        ccb->crcn.flags = CAM_FLAG_NONE;
201        xpt_action(ccb);
202
203        /* The scan is in progress now. */
204}
205
206/*
207 * vpo_intr()
208 */
209static void
210vpo_intr(struct vpo_data *vpo, struct ccb_scsiio *csio)
211{
212	int errno;	/* error in errno.h */
213	int s;
214#ifdef VP0_DEBUG
215	int i;
216#endif
217
218	s = splcam();
219
220	if (vpo->vpo_isplus) {
221		errno = imm_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
222			csio->ccb_h.target_id,
223			(char *)&csio->cdb_io.cdb_bytes, csio->cdb_len,
224			(char *)csio->data_ptr, csio->dxfer_len,
225			&vpo->vpo_stat, &vpo->vpo_count, &vpo->vpo_error);
226	} else {
227		errno = vpoio_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
228			csio->ccb_h.target_id,
229			(char *)&csio->cdb_io.cdb_bytes, csio->cdb_len,
230			(char *)csio->data_ptr, csio->dxfer_len,
231			&vpo->vpo_stat, &vpo->vpo_count, &vpo->vpo_error);
232	}
233
234#ifdef VP0_DEBUG
235	printf("vpo_do_scsi = %d, status = 0x%x, count = %d, vpo_error = %d\n",
236		 errno, vpo->vpo_stat, vpo->vpo_count, vpo->vpo_error);
237
238	/* dump of command */
239	for (i=0; i<csio->cdb_len; i++)
240		printf("%x ", ((char *)&csio->cdb_io.cdb_bytes)[i]);
241
242	printf("\n");
243#endif
244
245	if (errno) {
246		/* connection to ppbus interrupted */
247		csio->ccb_h.status = CAM_CMD_TIMEOUT;
248		goto error;
249	}
250
251	/* if a timeout occured, no sense */
252	if (vpo->vpo_error) {
253		if (vpo->vpo_error != VP0_ESELECT_TIMEOUT)
254			printf("vpo%d: VP0 error/timeout (%d)\n",
255				vpo->vpo_unit, vpo->vpo_error);
256
257		csio->ccb_h.status = CAM_CMD_TIMEOUT;
258		goto error;
259	}
260
261	/* check scsi status */
262	if (vpo->vpo_stat != SCSI_STATUS_OK) {
263	   csio->scsi_status = vpo->vpo_stat;
264
265	   /* check if we have to sense the drive */
266	   if ((vpo->vpo_stat & SCSI_STATUS_CHECK_COND) != 0) {
267
268		vpo->vpo_sense.cmd.opcode = REQUEST_SENSE;
269		vpo->vpo_sense.cmd.length = csio->sense_len;
270		vpo->vpo_sense.cmd.control = 0;
271
272		if (vpo->vpo_isplus) {
273			errno = imm_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
274				csio->ccb_h.target_id,
275				(char *)&vpo->vpo_sense.cmd,
276				sizeof(vpo->vpo_sense.cmd),
277				(char *)&csio->sense_data, csio->sense_len,
278				&vpo->vpo_sense.stat, &vpo->vpo_sense.count,
279				&vpo->vpo_error);
280		} else {
281			errno = vpoio_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
282				csio->ccb_h.target_id,
283				(char *)&vpo->vpo_sense.cmd,
284				sizeof(vpo->vpo_sense.cmd),
285				(char *)&csio->sense_data, csio->sense_len,
286				&vpo->vpo_sense.stat, &vpo->vpo_sense.count,
287				&vpo->vpo_error);
288		}
289
290
291#ifdef VP0_DEBUG
292		printf("(sense) vpo_do_scsi = %d, status = 0x%x, count = %d, vpo_error = %d\n",
293			errno, vpo->vpo_sense.stat, vpo->vpo_sense.count, vpo->vpo_error);
294#endif
295
296		/* check sense return status */
297		if (errno == 0 && vpo->vpo_sense.stat == SCSI_STATUS_OK) {
298		   /* sense ok */
299		   csio->ccb_h.status = CAM_AUTOSNS_VALID | CAM_SCSI_STATUS_ERROR;
300		   csio->sense_resid = csio->sense_len - vpo->vpo_sense.count;
301
302#ifdef VP0_DEBUG
303		   /* dump of sense info */
304		   printf("(sense) ");
305		   for (i=0; i<vpo->vpo_sense.count; i++)
306			printf("%x ", ((char *)&csio->sense_data)[i]);
307		   printf("\n");
308#endif
309
310		} else {
311		   /* sense failed */
312		   csio->ccb_h.status = CAM_AUTOSENSE_FAIL;
313		}
314	   } else {
315		/* no sense */
316		csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
317	   }
318
319	   goto error;
320	}
321
322	csio->resid = csio->dxfer_len - vpo->vpo_count;
323	csio->ccb_h.status = CAM_REQ_CMP;
324
325error:
326	splx(s);
327
328	return;
329}
330
331static void
332vpo_action(struct cam_sim *sim, union ccb *ccb)
333{
334
335	struct vpo_data *vpo = (struct vpo_data *)sim->softc;
336
337	switch (ccb->ccb_h.func_code) {
338	case XPT_SCSI_IO:
339	{
340		struct ccb_scsiio *csio;
341
342		csio = &ccb->csio;
343
344#ifdef VP0_DEBUG
345		printf("vpo%d: XPT_SCSI_IO (0x%x) request\n",
346			vpo->vpo_unit, csio->cdb_io.cdb_bytes[0]);
347#endif
348
349		vpo_intr(vpo, csio);
350
351		xpt_done(ccb);
352
353		break;
354	}
355	case XPT_CALC_GEOMETRY:
356	{
357		struct	  ccb_calc_geometry *ccg;
358
359		ccg = &ccb->ccg;
360
361#ifdef VP0_DEBUG
362		printf("vpo%d: XPT_CALC_GEOMETRY (bs=%d,vs=%d,c=%d,h=%d,spt=%d) request\n",
363			vpo->vpo_unit,
364			ccg->block_size,
365			ccg->volume_size,
366			ccg->cylinders,
367			ccg->heads,
368			ccg->secs_per_track);
369#endif
370
371		ccg->heads = 64;
372		ccg->secs_per_track = 32;
373		ccg->cylinders = ccg->volume_size /
374				 (ccg->heads * ccg->secs_per_track);
375
376		ccb->ccb_h.status = CAM_REQ_CMP;
377		xpt_done(ccb);
378		break;
379	}
380	case XPT_RESET_BUS:		/* Reset the specified SCSI bus */
381	{
382
383#ifdef VP0_DEBUG
384		printf("vpo%d: XPT_RESET_BUS request\n", vpo->vpo_unit);
385#endif
386
387		if (vpo->vpo_isplus) {
388			if (imm_reset_bus(&vpo->vpo_io)) {
389				ccb->ccb_h.status = CAM_REQ_CMP_ERR;
390				xpt_done(ccb);
391				return;
392			}
393		} else {
394			if (vpoio_reset_bus(&vpo->vpo_io)) {
395				ccb->ccb_h.status = CAM_REQ_CMP_ERR;
396				xpt_done(ccb);
397				return;
398			}
399		}
400
401		ccb->ccb_h.status = CAM_REQ_CMP;
402		xpt_done(ccb);
403		break;
404	}
405	case XPT_PATH_INQ:		/* Path routing inquiry */
406	{
407		struct ccb_pathinq *cpi = &ccb->cpi;
408
409#ifdef VP0_DEBUG
410		printf("vpo%d: XPT_PATH_INQ request\n", vpo->vpo_unit);
411#endif
412		cpi->version_num = 1; /* XXX??? */
413		cpi->hba_inquiry = 0;
414		cpi->target_sprt = 0;
415		cpi->hba_misc = 0;
416		cpi->hba_eng_cnt = 0;
417		cpi->max_target = 7;
418		cpi->max_lun = 0;
419		cpi->initiator_id = VP0_INITIATOR;
420		cpi->bus_id = sim->bus_id;
421		cpi->base_transfer_speed = 93;
422		strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
423		strncpy(cpi->hba_vid, "Iomega", HBA_IDLEN);
424		strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
425		cpi->unit_number = sim->unit_number;
426
427		cpi->ccb_h.status = CAM_REQ_CMP;
428		xpt_done(ccb);
429		break;
430	}
431	default:
432		ccb->ccb_h.status = CAM_REQ_INVALID;
433		xpt_done(ccb);
434		break;
435	}
436
437	return;
438}
439
440static void
441vpo_poll(struct cam_sim *sim)
442{
443	/* The ZIP is actually always polled throw vpo_action() */
444	return;
445}
446
447static devclass_t vpo_devclass;
448
449static device_method_t vpo_methods[] = {
450	/* device interface */
451	DEVMETHOD(device_identify,	vpo_identify),
452	DEVMETHOD(device_probe,		vpo_probe),
453	DEVMETHOD(device_attach,	vpo_attach),
454
455	{ 0, 0 }
456};
457
458static driver_t vpo_driver = {
459	"vpo",
460	vpo_methods,
461	sizeof(struct vpo_data),
462};
463DRIVER_MODULE(vpo, ppbus, vpo_driver, vpo_devclass, 0, 0);
464