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freebsd-skq/sys/dev/ppbus/immio.c
Nicolas Souchu 0f210c922b Port of ppbus standalone framework to the newbus system. 
Note1: the correct interrupt level is invoked correctly for each driver.
       For this purpose, drivers request the bus before being able to
       call BUS_SETUP_INTR and BUS_TEARDOWN_INTR call is forced by the ppbus
       core when drivers release it. Thus, when BUS_SETUP_INTR is called
       at ppbus driver level, ppbus checks that the caller owns the
       bus and stores the interrupt handler cookie (in order to unregister
       it later).

       Printing is impossible while plip link is up is still TRUE.
       vpo (ZIP driver) and lpt are make in such a way that
       using the ZIP and printing concurrently is permitted is also TRUE.

Note2: specific chipset detection is not done by default. PPC_PROBE_CHIPSET
       is now needed to force chipset detection. If set, the flags 0x40
       still avoid detection at boot.

Port of the pcf(4) driver to the newbus system (was previously directly
connected to the rootbus and attached by a bogus pcf_isa_probe function).
2000-01-14 00:18:06 +00:00

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/*-
* Copyright (c) 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.
*
* $FreeBSD$
*
*/
/*
* Iomega ZIP+ Matchmaker Parallel Port Interface driver
*
* Thanks to David Campbell work on the Linux driver and the Iomega specs
* Thanks to Thiebault Moeglin for the drive
*/
#ifdef _KERNEL
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <machine/clock.h>
#endif /* _KERNEL */
#ifdef _KERNEL
#include <sys/kernel.h>
#endif /* _KERNEL */
#include "opt_vpo.h"
#include <dev/ppbus/ppbio.h>
#include <dev/ppbus/ppbconf.h>
#include <dev/ppbus/ppb_msq.h>
#include <dev/ppbus/vpoio.h>
#include <dev/ppbus/ppb_1284.h>
#include "ppbus_if.h"
#define VP0_SELTMO 5000 /* select timeout */
#define VP0_FAST_SPINTMO 500000 /* wait status timeout */
#define VP0_LOW_SPINTMO 5000000 /* wait status timeout */
#define VP0_SECTOR_SIZE 512
/*
* Microcode to execute very fast I/O sequences at the lowest bus level.
*/
#define SELECT_TARGET MS_PARAM(6, 1, MS_TYP_CHA)
#define DECLARE_SELECT_MICROSEQUENCE \
struct ppb_microseq select_microseq[] = { \
MS_CASS(0xc), \
/* first, check there is nothing holding onto the bus */ \
MS_SET(VP0_SELTMO), \
/* _loop: */ \
MS_BRCLEAR(0x8, 2 /* _ready */), \
MS_DBRA(-2 /* _loop */), \
MS_RET(2), /* bus busy */ \
/* _ready: */ \
MS_CASS(0x4), \
MS_DASS(MS_UNKNOWN /* 0x80 | 1 << target */), \
MS_DELAY(1), \
MS_CASS(0xc), \
MS_CASS(0xd), \
/* now, wait until the drive is ready */ \
MS_SET(VP0_SELTMO), \
/* loop: */ \
MS_BRSET(0x8, 3 /* ready */), \
MS_DBRA(-2 /* loop */), \
/* error: */ \
MS_CASS(0xc), \
MS_RET(VP0_ESELECT_TIMEOUT), \
/* ready: */ \
MS_CASS(0xc), \
MS_RET(0) \
}
static struct ppb_microseq transfer_epilog[] = {
MS_CASS(0x4),
MS_CASS(0xc),
MS_CASS(0xe),
MS_CASS(0x4),
MS_RET(0)
};
#define CPP_S1 MS_PARAM(10, 2, MS_TYP_PTR)
#define CPP_S2 MS_PARAM(13, 2, MS_TYP_PTR)
#define CPP_S3 MS_PARAM(16, 2, MS_TYP_PTR)
#define CPP_PARAM MS_PARAM(17, 1, MS_TYP_CHA)
#define DECLARE_CPP_MICROSEQ \
struct ppb_microseq cpp_microseq[] = { \
MS_CASS(0x0c), MS_DELAY(2), \
MS_DASS(0xaa), MS_DELAY(10), \
MS_DASS(0x55), MS_DELAY(10), \
MS_DASS(0x00), MS_DELAY(10), \
MS_DASS(0xff), MS_DELAY(10), \
MS_RFETCH(MS_REG_STR, 0xb8, MS_UNKNOWN /* &s1 */), \
MS_DASS(0x87), MS_DELAY(10), \
MS_RFETCH(MS_REG_STR, 0xb8, MS_UNKNOWN /* &s2 */), \
MS_DASS(0x78), MS_DELAY(10), \
MS_RFETCH(MS_REG_STR, 0x38, MS_UNKNOWN /* &s3 */), \
MS_DASS(MS_UNKNOWN /* param */), \
MS_DELAY(2), \
MS_CASS(0x0c), MS_DELAY(10), \
MS_CASS(0x0d), MS_DELAY(2), \
MS_CASS(0x0c), MS_DELAY(10), \
MS_DASS(0xff), MS_DELAY(10), \
MS_RET(0) \
}
#define NEGOCIATED_MODE MS_PARAM(2, 1, MS_TYP_CHA)
#define DECLARE_NEGOCIATE_MICROSEQ \
static struct ppb_microseq negociate_microseq[] = { \
MS_CASS(0x4), \
MS_DELAY(5), \
MS_DASS(MS_UNKNOWN /* mode */), \
MS_DELAY(100), \
MS_CASS(0x6), \
MS_DELAY(5), \
MS_BRSET(0x20, 5 /* continue */), \
MS_DELAY(5), \
MS_CASS(0x7), \
MS_DELAY(5), \
MS_CASS(0x6), \
MS_RET(VP0_ENEGOCIATE), \
/* continue: */ \
MS_DELAY(5), \
MS_CASS(0x7), \
MS_DELAY(5), \
MS_CASS(0x6), \
MS_RET(0) \
}
static struct ppb_microseq reset_microseq[] = {
MS_CASS(0x04),
MS_DASS(0x40),
MS_DELAY(1),
MS_CASS(0x0c),
MS_CASS(0x0d),
MS_DELAY(50),
MS_CASS(0x0c),
MS_CASS(0x04),
MS_RET(0)
};
/*
* nibble_inbyte_hook()
*
* Formats high and low nibble into a character
*/
static int
nibble_inbyte_hook (void *p, char *ptr)
{
struct vpo_nibble *s = (struct vpo_nibble *)p;
/* increment the buffer pointer */
*ptr = ((s->l >> 4) & 0x0f) + (s->h & 0xf0);
return (0);
}
/*
* Macro used to initialize each vpoio_data structure during
* low level attachment
*
* XXX should be converted to ppb_MS_init_msq()
*/
#define INIT_NIBBLE_INBYTE_SUBMICROSEQ(vpo) { \
(vpo)->vpo_nibble_inbyte_msq[6].arg[2].p = \
(void *)&(vpo)->vpo_nibble.h; \
(vpo)->vpo_nibble_inbyte_msq[3].arg[2].p = \
(void *)&(vpo)->vpo_nibble.l; \
(vpo)->vpo_nibble_inbyte_msq[9].arg[0].f = \
nibble_inbyte_hook; \
(vpo)->vpo_nibble_inbyte_msq[9].arg[1].p = \
(void *)&(vpo)->vpo_nibble; \
}
/*
* This is the sub-microseqence for MS_GET in NIBBLE mode
* Retrieve the two nibbles and call the C function to generate the character
* and store it in the buffer (see nibble_inbyte_hook())
*/
static struct ppb_microseq nibble_inbyte_submicroseq[] = {
MS_CASS(0x4),
/* loop: */
MS_CASS(0x6),
MS_DELAY(1),
MS_RFETCH(MS_REG_STR, MS_FETCH_ALL, MS_UNKNOWN /* low nibble */),
MS_CASS(0x5),
MS_DELAY(1),
MS_RFETCH(MS_REG_STR, MS_FETCH_ALL, MS_UNKNOWN /* high nibble */),
MS_CASS(0x4),
MS_DELAY(1),
/* do a C call to format the received nibbles */
MS_C_CALL(MS_UNKNOWN /* C hook */, MS_UNKNOWN /* param */),
MS_DBRA(-7 /* loop */),
MS_RET(0)
};
/*
* This is the sub-microseqence for MS_GET in PS2 mode
*/
static struct ppb_microseq ps2_inbyte_submicroseq[] = {
MS_CASS(0x4),
/* loop: */
MS_CASS(PCD | 0x6),
MS_RFETCH_P(1, MS_REG_DTR, MS_FETCH_ALL),
MS_CASS(PCD | 0x5),
MS_DBRA(-4 /* loop */),
MS_RET(0)
};
/*
* This is the sub-microsequence for MS_PUT in both NIBBLE and PS2 modes
*/
static struct ppb_microseq spp_outbyte_submicroseq[] = {
MS_CASS(0x4),
/* loop: */
MS_RASSERT_P(1, MS_REG_DTR),
MS_CASS(0x5),
MS_DBRA(0), /* decrement counter */
MS_RASSERT_P(1, MS_REG_DTR),
MS_CASS(0x0),
MS_DBRA(-6 /* loop */),
/* return from the put call */
MS_CASS(0x4),
MS_RET(0)
};
/* EPP 1.7 microsequences, ptr and len set at runtime */
static struct ppb_microseq epp17_outstr[] = {
MS_CASS(0x4),
MS_RASSERT_P(MS_ACCUM, MS_REG_EPP_D),
MS_CASS(0xc),
MS_RET(0),
};
static struct ppb_microseq epp17_instr[] = {
MS_CASS(PCD | 0x4),
MS_RFETCH_P(MS_ACCUM, MS_REG_EPP_D, MS_FETCH_ALL),
MS_CASS(PCD | 0xc),
MS_RET(0),
};
static int
imm_disconnect(struct vpoio_data *vpo, int *connected, int release_bus)
{
DECLARE_CPP_MICROSEQ;
device_t ppbus = device_get_parent(vpo->vpo_dev);
char s1, s2, s3;
int ret;
/* all should be ok */
if (connected)
*connected = 0;
ppb_MS_init_msq(cpp_microseq, 4, CPP_S1, (void *)&s1,
CPP_S2, (void *)&s2, CPP_S3, (void *)&s3,
CPP_PARAM, 0x30);
ppb_MS_microseq(ppbus, vpo->vpo_dev, cpp_microseq, &ret);
if ((s1 != (char)0xb8 || s2 != (char)0x18 || s3 != (char)0x38)) {
if (bootverbose)
printf("imm%d: (disconnect) s1=0x%x s2=0x%x, s3=0x%x\n",
vpo->vpo_unit, s1 & 0xff, s2 & 0xff, s3 & 0xff);
if (connected)
*connected = VP0_ECONNECT;
}
if (release_bus)
return (ppb_release_bus(ppbus, vpo->vpo_dev));
else
return (0);
}
/*
* how : PPB_WAIT or PPB_DONTWAIT
*/
static int
imm_connect(struct vpoio_data *vpo, int how, int *disconnected, int request_bus)
{
DECLARE_CPP_MICROSEQ;
device_t ppbus = device_get_parent(vpo->vpo_dev);
char s1, s2, s3;
int error;
int ret;
/* all should be ok */
if (disconnected)
*disconnected = 0;
if (request_bus)
if ((error = ppb_request_bus(ppbus, vpo->vpo_dev, how)))
return (error);
ppb_MS_init_msq(cpp_microseq, 3, CPP_S1, (void *)&s1,
CPP_S2, (void *)&s2, CPP_S3, (void *)&s3);
/* select device 0 in compatible mode */
ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0xe0);
ppb_MS_microseq(ppbus, vpo->vpo_dev, cpp_microseq, &ret);
/* disconnect all devices */
ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0x30);
ppb_MS_microseq(ppbus, vpo->vpo_dev, cpp_microseq, &ret);
if (PPB_IN_EPP_MODE(ppbus))
ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0x28);
else
ppb_MS_init_msq(cpp_microseq, 1, CPP_PARAM, 0xe0);
ppb_MS_microseq(ppbus, vpo->vpo_dev, cpp_microseq, &ret);
if ((s1 != (char)0xb8 || s2 != (char)0x18 || s3 != (char)0x30)) {
if (bootverbose)
printf("imm%d: (connect) s1=0x%x s2=0x%x, s3=0x%x\n",
vpo->vpo_unit, s1 & 0xff, s2 & 0xff, s3 & 0xff);
if (disconnected)
*disconnected = VP0_ECONNECT;
}
return (0);
}
/*
* imm_detect()
*
* Detect and initialise the VP0 adapter.
*/
static int
imm_detect(struct vpoio_data *vpo)
{
device_t ppbus = device_get_parent(vpo->vpo_dev);
int error;
if ((error = ppb_request_bus(ppbus, vpo->vpo_dev, PPB_DONTWAIT)))
return (error);
/* disconnect the drive, keep the bus */
imm_disconnect(vpo, NULL, 0);
/* we already have the bus, just connect */
imm_connect(vpo, PPB_DONTWAIT, &error, 0);
if (error) {
if (bootverbose)
printf("imm%d: can't connect to the drive\n",
vpo->vpo_unit);
goto error;
}
/* send SCSI reset signal */
ppb_MS_microseq(ppbus, vpo->vpo_dev, reset_microseq, NULL);
/* release the bus now */
imm_disconnect(vpo, &error, 1);
/* ensure we are disconnected or daisy chained peripheral
* may cause serious problem to the disk */
if (error) {
if (bootverbose)
printf("imm%d: can't disconnect from the drive\n",
vpo->vpo_unit);
goto error;
}
return (0);
error:
ppb_release_bus(ppbus, vpo->vpo_dev);
return (VP0_EINITFAILED);
}
/*
* imm_outstr()
*/
static int
imm_outstr(struct vpoio_data *vpo, char *buffer, int size)
{
device_t ppbus = device_get_parent(vpo->vpo_dev);
int error = 0;
if (PPB_IN_EPP_MODE(ppbus))
ppb_reset_epp_timeout(ppbus);
ppb_MS_exec(ppbus, vpo->vpo_dev, MS_OP_PUT, (union ppb_insarg)buffer,
(union ppb_insarg)size, (union ppb_insarg)MS_UNKNOWN, &error);
return (error);
}
/*
* imm_instr()
*/
static int
imm_instr(struct vpoio_data *vpo, char *buffer, int size)
{
device_t ppbus = device_get_parent(vpo->vpo_dev);
int error = 0;
if (PPB_IN_EPP_MODE(ppbus))
ppb_reset_epp_timeout(ppbus);
ppb_MS_exec(ppbus, vpo->vpo_dev, MS_OP_GET, (union ppb_insarg)buffer,
(union ppb_insarg)size, (union ppb_insarg)MS_UNKNOWN, &error);
return (error);
}
static char
imm_select(struct vpoio_data *vpo, int initiator, int target)
{
DECLARE_SELECT_MICROSEQUENCE;
device_t ppbus = device_get_parent(vpo->vpo_dev);
int ret;
/* initialize the select microsequence */
ppb_MS_init_msq(select_microseq, 1,
SELECT_TARGET, 1 << initiator | 1 << target);
ppb_MS_microseq(ppbus, vpo->vpo_dev, select_microseq, &ret);
return (ret);
}
/*
* imm_wait()
*
* H_SELIN must be low.
*
* XXX should be ported to microseq
*/
static char
imm_wait(struct vpoio_data *vpo, int tmo)
{
device_t ppbus = device_get_parent(vpo->vpo_dev);
register int k;
register char r;
ppb_wctr(ppbus, 0xc);
/* XXX should be ported to microseq */
k = 0;
while (!((r = ppb_rstr(ppbus)) & 0x80) && (k++ < tmo))
DELAY(1);
/*
* Return some status information.
* Semantics : 0x88 = ZIP+ wants more data
* 0x98 = ZIP+ wants to send more data
* 0xa8 = ZIP+ wants command
* 0xb8 = end of transfer, ZIP+ is sending status
*/
ppb_wctr(ppbus, 0x4);
if (k < tmo)
return (r & 0xb8);
return (0); /* command timed out */
}
static int
imm_negociate(struct vpoio_data *vpo)
{
DECLARE_NEGOCIATE_MICROSEQ;
device_t ppbus = device_get_parent(vpo->vpo_dev);
int negociate_mode;
int ret;
if (PPB_IN_NIBBLE_MODE(ppbus))
negociate_mode = 0;
else if (PPB_IN_PS2_MODE(ppbus))
negociate_mode = 1;
else
return (0);
#if 0 /* XXX use standalone code not to depend on ppb_1284 code yet */
ret = ppb_1284_negociate(ppbus, negociate_mode);
if (ret)
return (VP0_ENEGOCIATE);
#endif
ppb_MS_init_msq(negociate_microseq, 1,
NEGOCIATED_MODE, negociate_mode);
ppb_MS_microseq(ppbus, vpo->vpo_dev, negociate_microseq, &ret);
return (ret);
}
/*
* imm_probe()
*
* Low level probe of vpo device
*
*/
int
imm_probe(device_t dev, struct vpoio_data *vpo)
{
int error;
/* ppbus dependent initialisation */
vpo->vpo_dev = dev;
/* now, try to initialise the drive */
if ((error = imm_detect(vpo))) {
return (error);
}
return (0);
}
/*
* imm_attach()
*
* Low level attachment of vpo device
*
*/
int
imm_attach(struct vpoio_data *vpo)
{
device_t ppbus = device_get_parent(vpo->vpo_dev);
int epp;
/*
* Initialize microsequence code
*/
vpo->vpo_nibble_inbyte_msq = (struct ppb_microseq *)malloc(
sizeof(nibble_inbyte_submicroseq), M_DEVBUF, M_NOWAIT);
if (!vpo->vpo_nibble_inbyte_msq)
return (ENXIO);
bcopy((void *)nibble_inbyte_submicroseq,
(void *)vpo->vpo_nibble_inbyte_msq,
sizeof(nibble_inbyte_submicroseq));
INIT_NIBBLE_INBYTE_SUBMICROSEQ(vpo);
/*
* Initialize mode dependent in/out microsequences
*/
ppb_request_bus(ppbus, vpo->vpo_dev, PPB_WAIT);
/* enter NIBBLE mode to configure submsq */
if (ppb_set_mode(ppbus, PPB_NIBBLE) != -1) {
ppb_MS_GET_init(ppbus, vpo->vpo_dev, vpo->vpo_nibble_inbyte_msq);
ppb_MS_PUT_init(ppbus, vpo->vpo_dev, spp_outbyte_submicroseq);
}
/* enter PS2 mode to configure submsq */
if (ppb_set_mode(ppbus, PPB_PS2) != -1) {
ppb_MS_GET_init(ppbus, vpo->vpo_dev, ps2_inbyte_submicroseq);
ppb_MS_PUT_init(ppbus, vpo->vpo_dev, spp_outbyte_submicroseq);
}
epp = ppb_get_epp_protocol(ppbus);
/* enter EPP mode to configure submsq */
if (ppb_set_mode(ppbus, PPB_EPP) != -1) {
switch (epp) {
case EPP_1_9:
case EPP_1_7:
ppb_MS_GET_init(ppbus, vpo->vpo_dev, epp17_instr);
ppb_MS_PUT_init(ppbus, vpo->vpo_dev, epp17_outstr);
break;
default:
panic("%s: unknown EPP protocol (0x%x)", __FUNCTION__,
epp);
}
}
/* try to enter EPP or PS/2 mode, NIBBLE otherwise */
if (ppb_set_mode(ppbus, PPB_EPP) != -1) {
switch (epp) {
case EPP_1_9:
printf("imm%d: EPP 1.9 mode\n", vpo->vpo_unit);
break;
case EPP_1_7:
printf("imm%d: EPP 1.7 mode\n", vpo->vpo_unit);
break;
default:
panic("%s: unknown EPP protocol (0x%x)", __FUNCTION__,
epp);
}
} else if (ppb_set_mode(ppbus, PPB_PS2) != -1)
printf("imm%d: PS2 mode\n", vpo->vpo_unit);
else if (ppb_set_mode(ppbus, PPB_NIBBLE) != -1)
printf("imm%d: NIBBLE mode\n", vpo->vpo_unit);
else {
printf("imm%d: can't enter NIBBLE, PS2 or EPP mode\n",
vpo->vpo_unit);
ppb_release_bus(ppbus, vpo->vpo_dev);
free(vpo->vpo_nibble_inbyte_msq, M_DEVBUF);
return (ENXIO);
}
ppb_release_bus(ppbus, vpo->vpo_dev);
return (0);
}
/*
* imm_reset_bus()
*
*/
int
imm_reset_bus(struct vpoio_data *vpo)
{
device_t ppbus = device_get_parent(vpo->vpo_dev);
int disconnected;
/* first, connect to the drive and request the bus */
imm_connect(vpo, PPB_WAIT|PPB_INTR, &disconnected, 1);
if (!disconnected) {
/* reset the SCSI bus */
ppb_MS_microseq(ppbus, vpo->vpo_dev, reset_microseq, NULL);
/* then disconnect */
imm_disconnect(vpo, NULL, 1);
}
return (0);
}
/*
* imm_do_scsi()
*
* Send an SCSI command
*
*/
int
imm_do_scsi(struct vpoio_data *vpo, int host, int target, char *command,
int clen, char *buffer, int blen, int *result, int *count,
int *ret)
{
device_t ppbus = device_get_parent(vpo->vpo_dev);
register char r;
char l, h = 0;
int len, error = 0, not_connected = 0;
register int k;
int negociated = 0;
/*
* enter disk state, allocate the ppbus
*
* XXX
* Should we allow this call to be interruptible?
* The only way to report the interruption is to return
* EIO do upper SCSI code :^(
*/
if ((error = imm_connect(vpo, PPB_WAIT|PPB_INTR, &not_connected, 1)))
return (error);
if (not_connected) {
*ret = VP0_ECONNECT; goto error;
}
/*
* Select the drive ...
*/
if ((*ret = imm_select(vpo,host,target)))
goto error;
/*
* Send the command ...
*/
for (k = 0; k < clen; k+=2) {
if (imm_wait(vpo, VP0_FAST_SPINTMO) != (char)0xa8) {
*ret = VP0_ECMD_TIMEOUT;
goto error;
}
if (imm_outstr(vpo, &command[k], 2)) {
*ret = VP0_EPPDATA_TIMEOUT;
goto error;
}
}
if (!(r = imm_wait(vpo, VP0_LOW_SPINTMO))) {
*ret = VP0_ESTATUS_TIMEOUT; goto error;
}
if ((r & 0x30) == 0x10) {
if (imm_negociate(vpo)) {
*ret = VP0_ENEGOCIATE;
goto error;
} else
negociated = 1;
}
/*
* Complete transfer ...
*/
*count = 0;
for (;;) {
if (!(r = imm_wait(vpo, VP0_LOW_SPINTMO))) {
*ret = VP0_ESTATUS_TIMEOUT; goto error;
}
/* stop when the ZIP+ wants to send status */
if (r == (char)0xb8)
break;
if (*count >= blen) {
*ret = VP0_EDATA_OVERFLOW;
goto error;
}
/* ZIP+ wants to send data? */
if (r == (char)0x88) {
len = (((blen - *count) >= VP0_SECTOR_SIZE)) ?
VP0_SECTOR_SIZE : 2;
error = imm_outstr(vpo, &buffer[*count], len);
} else {
if (!PPB_IN_EPP_MODE(ppbus))
len = 1;
else
len = (((blen - *count) >= VP0_SECTOR_SIZE)) ?
VP0_SECTOR_SIZE : 1;
error = imm_instr(vpo, &buffer[*count], len);
}
if (error) {
*ret = error;
goto error;
}
*count += len;
}
if ((PPB_IN_NIBBLE_MODE(ppbus) ||
PPB_IN_PS2_MODE(ppbus)) && negociated)
ppb_MS_microseq(ppbus, vpo->vpo_dev, transfer_epilog, NULL);
/*
* Retrieve status ...
*/
if (imm_negociate(vpo)) {
*ret = VP0_ENEGOCIATE;
goto error;
} else
negociated = 1;
if (imm_instr(vpo, &l, 1)) {
*ret = VP0_EOTHER; goto error;
}
/* check if the ZIP+ wants to send more status */
if (imm_wait(vpo, VP0_FAST_SPINTMO) == (char)0xb8)
if (imm_instr(vpo, &h, 1)) {
*ret = VP0_EOTHER+2; goto error;
}
*result = ((int) h << 8) | ((int) l & 0xff);
error:
if ((PPB_IN_NIBBLE_MODE(ppbus) ||
PPB_IN_PS2_MODE(ppbus)) && negociated)
ppb_MS_microseq(ppbus, vpo->vpo_dev, transfer_epilog, NULL);
/* return to printer state, release the ppbus */
imm_disconnect(vpo, NULL, 1);
return (0);
}
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