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freebsd-nq/sys/dev/ppbus/vpo.c
John Baldwin ae6b868a2a Several cleanups to remove the need for explicit unit numbers and a few 
other fixes:
- Add pointers back to device_t objects in softc structures instead
  of storing the unit and using devclass_get_device().
- Add 'lpbb', 'pcf', 'pps', and 'vpo' child devices to every 'ppbus' device
  instead of just the first one.
- Store softc pointers in si_drv1 of character devices instead of
  pulling the unit number from the minor number and using
  devclass_get_softc() and devclass_get_device().
- Store the LP_BYPASS flag in si_drv2 instead of encoding it in the minor
  number.
- Destroy character devices for lpt(4) when detaching the device.
- Use bus_print_child_footer() instead of duplicating it in
  ppbus_print_child() and fix ppbus_print_child()'s return value.
- Remove unused AVM ivar from ppbus.
- Don't store the 'mode' ivar in the ppbus ivars since we always fetch it
  from the parent anyway.
- Try to detach all the child devices before deleting them in
  ppbus_detach().
- Use pause() instead of a tsleep() on a dummy address when polling the
  ppbus.
- Use if_printf() and device_printf() instead of explicit names with unit
  numbers.

Silence on:	current@
2008-10-21 18:30:10 +00:00

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/*-
* Copyright (c) 1997, 1998, 1999 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.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/malloc.h>
#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/cam_periph.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_message.h>
#include <cam/scsi/scsi_da.h>
#include <sys/kernel.h>
#include "opt_vpo.h"
#include <dev/ppbus/ppbconf.h>
#include <dev/ppbus/vpoio.h>
#include "ppbus_if.h"
struct vpo_sense {
struct scsi_sense cmd;
unsigned int stat;
unsigned int count;
};
struct vpo_data {
device_t vpo_dev;
int vpo_stat;
int vpo_count;
int vpo_error;
int vpo_isplus;
struct cam_sim *sim;
struct vpo_sense vpo_sense;
struct vpoio_data vpo_io; /* interface to low level functions */
};
#define DEVTOSOFTC(dev) \
((struct vpo_data *)device_get_softc(dev))
/* cam related functions */
static void vpo_action(struct cam_sim *sim, union ccb *ccb);
static void vpo_poll(struct cam_sim *sim);
static void vpo_cam_rescan_callback(struct cam_periph *periph,
union ccb *ccb);
static void vpo_cam_rescan(struct vpo_data *vpo);
static void
vpo_identify(driver_t *driver, device_t parent)
{
device_t dev;
dev = device_find_child(parent, "vpo", -1);
if (!dev)
BUS_ADD_CHILD(parent, 0, "vpo", -1);
}
/*
* vpo_probe()
*/
static int
vpo_probe(device_t dev)
{
struct vpo_data *vpo;
int error;
vpo = DEVTOSOFTC(dev);
vpo->vpo_dev = dev;
/* check ZIP before ZIP+ or imm_probe() will send controls to
* the printer or whatelse connected to the port */
if ((error = vpoio_probe(dev, &vpo->vpo_io)) == 0) {
vpo->vpo_isplus = 0;
device_set_desc(dev,
"Iomega VPI0 Parallel to SCSI interface");
} else if ((error = imm_probe(dev, &vpo->vpo_io)) == 0) {
vpo->vpo_isplus = 1;
device_set_desc(dev,
"Iomega Matchmaker Parallel to SCSI interface");
} else {
return (error);
}
return (0);
}
/*
* vpo_attach()
*/
static int
vpo_attach(device_t dev)
{
struct vpo_data *vpo = DEVTOSOFTC(dev);
struct cam_devq *devq;
int error;
/* low level attachment */
if (vpo->vpo_isplus) {
if ((error = imm_attach(&vpo->vpo_io)))
return (error);
} else {
if ((error = vpoio_attach(&vpo->vpo_io)))
return (error);
}
/*
** 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 (ENXIO);
vpo->sim = cam_sim_alloc(vpo_action, vpo_poll, "vpo", vpo,
device_get_unit(dev), &Giant,
/*untagged*/1, /*tagged*/0, devq);
if (vpo->sim == NULL) {
cam_simq_free(devq);
return (ENXIO);
}
if (xpt_bus_register(vpo->sim, dev, /*bus*/0) != CAM_SUCCESS) {
cam_sim_free(vpo->sim, /*free_devq*/TRUE);
return (ENXIO);
}
/* all went ok */
vpo_cam_rescan(vpo); /* have CAM rescan the bus */
return (0);
}
static void
vpo_cam_rescan_callback(struct cam_periph *periph, union ccb *ccb)
{
free(ccb, M_TEMP);
}
static void
vpo_cam_rescan(struct vpo_data *vpo)
{
struct cam_path *path;
union ccb *ccb = malloc(sizeof(union ccb), M_TEMP, M_WAITOK | M_ZERO);
if (xpt_create_path(&path, xpt_periph, cam_sim_path(vpo->sim), 0, 0)
!= CAM_REQ_CMP) {
/* A failure is benign as the user can do a manual rescan */
free(ccb, M_TEMP);
return;
}
xpt_setup_ccb(&ccb->ccb_h, path, 5/*priority (low)*/);
ccb->ccb_h.func_code = XPT_SCAN_BUS;
ccb->ccb_h.cbfcnp = vpo_cam_rescan_callback;
ccb->crcn.flags = CAM_FLAG_NONE;
xpt_action(ccb);
/* The scan is in progress now. */
}
/*
* 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)
device_printf(vpo->vpo_dev, "VP0 error/timeout (%d)\n",
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
device_printf(vpo->vpo_dev, "XPT_SCSI_IO (0x%x) request\n",
csio->cdb_io.cdb_bytes[0]);
#endif
vpo_intr(vpo, csio);
xpt_done(ccb);
break;
}
case XPT_CALC_GEOMETRY:
{
struct ccb_calc_geometry *ccg;
ccg = &ccb->ccg;
#ifdef VP0_DEBUG
device_printf(vpo->vpo_dev, "XPT_CALC_GEOMETRY (bs=%d,vs=%jd,c=%d,h=%d,spt=%d) request\n",
ccg->block_size,
(intmax_t)ccg->volume_size,
ccg->cylinders,
ccg->heads,
ccg->secs_per_track);
#endif
ccg->heads = 64;
ccg->secs_per_track = 32;
ccg->cylinders = ccg->volume_size /
(ccg->heads * ccg->secs_per_track);
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
case XPT_RESET_BUS: /* Reset the specified SCSI bus */
{
#ifdef VP0_DEBUG
device_printf(vpo->vpo_dev, "XPT_RESET_BUS request\n");
#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
device_printf(vpo->vpo_dev, "XPT_PATH_INQ request\n");
#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;
}
static devclass_t vpo_devclass;
static device_method_t vpo_methods[] = {
/* device interface */
DEVMETHOD(device_identify, vpo_identify),
DEVMETHOD(device_probe, vpo_probe),
DEVMETHOD(device_attach, vpo_attach),
{ 0, 0 }
};
static driver_t vpo_driver = {
"vpo",
vpo_methods,
sizeof(struct vpo_data),
};
DRIVER_MODULE(vpo, ppbus, vpo_driver, vpo_devclass, 0, 0);
MODULE_DEPEND(vpo, ppbus, 1, 1, 1);
MODULE_DEPEND(vpo, cam, 1, 1, 1);
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