freebsd-dev/sys/dev/ppbus/vpo.c
Kenneth D. Merry db15b5b790 The base transfer speed for the parallel port bus is 93K/sec, not 3.3MB/sec.
Submitted by:	Nick Hibma <hibma@skylink.it>
1999-05-06 21:14:49 +00:00

448 lines
10 KiB
C

/*-
* Copyright (c) 1997, 1998 Nicolas Souchu
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: vpo.c,v 1.13 1999/05/06 21:12:52 ken Exp $
*
*/
#ifdef KERNEL
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <machine/clock.h>
#endif /* KERNEL */
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt_sim.h>
#include <cam/cam_debug.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_message.h>
#include <cam/scsi/scsi_da.h>
#ifdef KERNEL
#include <sys/kernel.h>
#endif /*KERNEL */
#include "opt_vpo.h"
#include <dev/ppbus/ppbconf.h>
#include <dev/ppbus/vpoio.h>
struct vpo_sense {
struct scsi_sense cmd;
unsigned int stat;
unsigned int count;
};
struct vpo_data {
unsigned short vpo_unit;
int vpo_stat;
int vpo_count;
int vpo_error;
int vpo_isplus;
struct cam_sim *sim;
struct cam_path *path;
struct vpo_sense vpo_sense;
struct vpoio_data vpo_io; /* interface to low level functions */
};
/* cam related functions */
static void vpo_action(struct cam_sim *sim, union ccb *ccb);
static void vpo_poll(struct cam_sim *sim);
static int nvpo = 0;
#define MAXVP0 8 /* XXX not much better! */
static struct vpo_data *vpodata[MAXVP0];
#ifdef KERNEL
/*
* Make ourselves visible as a ppbus driver
*/
static struct ppb_device *vpoprobe(struct ppb_data *ppb);
static int vpoattach(struct ppb_device *dev);
static struct ppb_driver vpodriver = {
vpoprobe, vpoattach, "vpo"
};
DATA_SET(ppbdriver_set, vpodriver);
#endif /* KERNEL */
/*
* vpoprobe()
*
* Called by ppb_attachdevs().
*/
static struct ppb_device *
vpoprobe(struct ppb_data *ppb)
{
struct vpo_data *vpo;
struct ppb_device *dev;
if (nvpo >= MAXVP0) {
printf("vpo: Too many devices (max %d)\n", MAXVP0);
return(NULL);
}
vpo = (struct vpo_data *)malloc(sizeof(struct vpo_data),
M_DEVBUF, M_NOWAIT);
if (!vpo) {
printf("vpo: cannot malloc!\n");
return(NULL);
}
bzero(vpo, sizeof(struct vpo_data));
vpodata[nvpo] = vpo;
/* vpo dependent initialisation */
vpo->vpo_unit = nvpo;
/* ok, go to next device on next probe */
nvpo ++;
/* low level probe */
vpoio_set_unit(&vpo->vpo_io, vpo->vpo_unit);
/* check ZIP before ZIP+ or imm_probe() will send controls to
* the printer or whatelse connected to the port */
if ((dev = vpoio_probe(ppb, &vpo->vpo_io))) {
vpo->vpo_isplus = 0;
} else if ((dev = imm_probe(ppb, &vpo->vpo_io))) {
vpo->vpo_isplus = 1;
} else {
free(vpo, M_DEVBUF);
return (NULL);
}
return (dev);
}
/*
* vpoattach()
*
* Called by ppb_attachdevs().
*/
static int
vpoattach(struct ppb_device *dev)
{
struct vpo_data *vpo = vpodata[dev->id_unit];
struct cam_devq *devq;
/* low level attachment */
if (vpo->vpo_isplus) {
if (!imm_attach(&vpo->vpo_io))
return (0);
} else {
if (!vpoio_attach(&vpo->vpo_io))
return (0);
}
/*
** Now tell the generic SCSI layer
** about our bus.
*/
devq = cam_simq_alloc(/*maxopenings*/1);
/* XXX What about low-level detach on error? */
if (devq == NULL)
return (0);
vpo->sim = cam_sim_alloc(vpo_action, vpo_poll, "vpo", vpo, dev->id_unit,
/*untagged*/1, /*tagged*/0, devq);
if (vpo->sim == NULL) {
cam_simq_free(devq);
return (0);
}
if (xpt_bus_register(vpo->sim, /*bus*/0) != CAM_SUCCESS) {
cam_sim_free(vpo->sim, /*free_devq*/TRUE);
return (0);
}
if (xpt_create_path(&vpo->path, /*periph*/NULL,
cam_sim_path(vpo->sim), CAM_TARGET_WILDCARD,
CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
xpt_bus_deregister(cam_sim_path(vpo->sim));
cam_sim_free(vpo->sim, /*free_devq*/TRUE);
return (0);
}
/* all went ok */
return (1);
}
/*
* vpo_intr()
*/
static void
vpo_intr(struct vpo_data *vpo, struct ccb_scsiio *csio)
{
int errno; /* error in errno.h */
int s;
#ifdef VP0_DEBUG
int i;
#endif
s = splcam();
if (vpo->vpo_isplus) {
errno = imm_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
csio->ccb_h.target_id,
(char *)&csio->cdb_io.cdb_bytes, csio->cdb_len,
(char *)csio->data_ptr, csio->dxfer_len,
&vpo->vpo_stat, &vpo->vpo_count, &vpo->vpo_error);
} else {
errno = vpoio_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
csio->ccb_h.target_id,
(char *)&csio->cdb_io.cdb_bytes, csio->cdb_len,
(char *)csio->data_ptr, csio->dxfer_len,
&vpo->vpo_stat, &vpo->vpo_count, &vpo->vpo_error);
}
#ifdef VP0_DEBUG
printf("vpo_do_scsi = %d, status = 0x%x, count = %d, vpo_error = %d\n",
errno, vpo->vpo_stat, vpo->vpo_count, vpo->vpo_error);
/* dump of command */
for (i=0; i<csio->cdb_len; i++)
printf("%x ", ((char *)&csio->cdb_io.cdb_bytes)[i]);
printf("\n");
#endif
if (errno) {
/* connection to ppbus interrupted */
csio->ccb_h.status = CAM_CMD_TIMEOUT;
goto error;
}
/* if a timeout occured, no sense */
if (vpo->vpo_error) {
if (vpo->vpo_error != VP0_ESELECT_TIMEOUT)
printf("vpo%d: VP0 error/timeout (%d)\n",
vpo->vpo_unit, vpo->vpo_error);
csio->ccb_h.status = CAM_CMD_TIMEOUT;
goto error;
}
/* check scsi status */
if (vpo->vpo_stat != SCSI_STATUS_OK) {
csio->scsi_status = vpo->vpo_stat;
/* check if we have to sense the drive */
if ((vpo->vpo_stat & SCSI_STATUS_CHECK_COND) != 0) {
vpo->vpo_sense.cmd.opcode = REQUEST_SENSE;
vpo->vpo_sense.cmd.length = csio->sense_len;
vpo->vpo_sense.cmd.control = 0;
if (vpo->vpo_isplus) {
errno = imm_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
csio->ccb_h.target_id,
(char *)&vpo->vpo_sense.cmd,
sizeof(vpo->vpo_sense.cmd),
(char *)&csio->sense_data, csio->sense_len,
&vpo->vpo_sense.stat, &vpo->vpo_sense.count,
&vpo->vpo_error);
} else {
errno = vpoio_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
csio->ccb_h.target_id,
(char *)&vpo->vpo_sense.cmd,
sizeof(vpo->vpo_sense.cmd),
(char *)&csio->sense_data, csio->sense_len,
&vpo->vpo_sense.stat, &vpo->vpo_sense.count,
&vpo->vpo_error);
}
#ifdef VP0_DEBUG
printf("(sense) vpo_do_scsi = %d, status = 0x%x, count = %d, vpo_error = %d\n",
errno, vpo->vpo_sense.stat, vpo->vpo_sense.count, vpo->vpo_error);
#endif
/* check sense return status */
if (errno == 0 && vpo->vpo_sense.stat == SCSI_STATUS_OK) {
/* sense ok */
csio->ccb_h.status = CAM_AUTOSNS_VALID | CAM_SCSI_STATUS_ERROR;
csio->sense_resid = csio->sense_len - vpo->vpo_sense.count;
#ifdef VP0_DEBUG
/* dump of sense info */
printf("(sense) ");
for (i=0; i<vpo->vpo_sense.count; i++)
printf("%x ", ((char *)&csio->sense_data)[i]);
printf("\n");
#endif
} else {
/* sense failed */
csio->ccb_h.status = CAM_AUTOSENSE_FAIL;
}
} else {
/* no sense */
csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
}
goto error;
}
csio->resid = csio->dxfer_len - vpo->vpo_count;
csio->ccb_h.status = CAM_REQ_CMP;
error:
splx(s);
return;
}
static void
vpo_action(struct cam_sim *sim, union ccb *ccb)
{
struct vpo_data *vpo = (struct vpo_data *)sim->softc;
switch (ccb->ccb_h.func_code) {
case XPT_SCSI_IO:
{
struct ccb_scsiio *csio;
csio = &ccb->csio;
#ifdef VP0_DEBUG
printf("vpo%d: XPT_SCSI_IO (0x%x) request\n",
vpo->vpo_unit, csio->cdb_io.cdb_bytes[0]);
#endif
vpo_intr(vpo, csio);
xpt_done(ccb);
break;
}
case XPT_CALC_GEOMETRY:
{
struct ccb_calc_geometry *ccg;
u_int32_t size_mb;
u_int32_t secs_per_cylinder;
ccg = &ccb->ccg;
size_mb = ccg->volume_size
/ ((1024L * 1024L) / ccg->block_size);
#ifdef VP0_DEBUG
printf("vpo%d: XPT_CALC_GEOMETRY (%d, %d) request\n",
vpo->vpo_unit, ccg->volume_size, ccg->block_size);
#endif
ccg->heads = 64;
ccg->secs_per_track = 32;
secs_per_cylinder = ccg->heads * ccg->secs_per_track;
ccg->cylinders = ccg->volume_size / secs_per_cylinder;
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
case XPT_RESET_BUS: /* Reset the specified SCSI bus */
{
#ifdef VP0_DEBUG
printf("vpo%d: XPT_RESET_BUS request\n", vpo->vpo_unit);
#endif
if (vpo->vpo_isplus) {
if (imm_reset_bus(&vpo->vpo_io)) {
ccb->ccb_h.status = CAM_REQ_CMP_ERR;
xpt_done(ccb);
return;
}
} else {
if (vpoio_reset_bus(&vpo->vpo_io)) {
ccb->ccb_h.status = CAM_REQ_CMP_ERR;
xpt_done(ccb);
return;
}
}
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
case XPT_PATH_INQ: /* Path routing inquiry */
{
struct ccb_pathinq *cpi = &ccb->cpi;
#ifdef VP0_DEBUG
printf("vpo%d: XPT_PATH_INQ request\n", vpo->vpo_unit);
#endif
cpi->version_num = 1; /* XXX??? */
cpi->hba_inquiry = 0;
cpi->target_sprt = 0;
cpi->hba_misc = 0;
cpi->hba_eng_cnt = 0;
cpi->max_target = 7;
cpi->max_lun = 0;
cpi->initiator_id = VP0_INITIATOR;
cpi->bus_id = sim->bus_id;
cpi->base_transfer_speed = 93;
strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
strncpy(cpi->hba_vid, "Iomega", HBA_IDLEN);
strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
cpi->unit_number = sim->unit_number;
cpi->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
default:
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
break;
}
return;
}
static void
vpo_poll(struct cam_sim *sim)
{
/* The ZIP is actually always polled throw vpo_action() */
return;
}