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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/ata/atapci/chipsets/atacyrix/@/dev/ppbus/immio.c |
/*-
* Copyright (c) 1998, 1999 Nicolas Souchu
* Copyright (c) 2001 Alcove - 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: release/9.1.0/sys/dev/ppbus/immio.c 187576 2009-01-21 23:10:06Z jhb $");
/*
* 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>
#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 WAIT_RET MS_PARAM(7, 2, MS_TYP_PTR)
#define WAIT_TMO MS_PARAM(1, 0, MS_TYP_INT)
#define DECLARE_WAIT_MICROSEQUENCE \
struct ppb_microseq wait_microseq[] = { \
MS_CASS(0x0c), \
MS_SET(MS_UNKNOWN), \
/* loop */ \
MS_BRSET(nBUSY, 4 /* ready */), \
MS_DBRA(-2 /* loop */), \
MS_CASS(0x04), \
MS_RET(1), /* timed out */ \
/* ready */ \
MS_CASS(0x04), \
MS_RFETCH(MS_REG_STR, 0xb8, MS_UNKNOWN ), \
MS_RET(0) /* no error */ \
}
#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 \
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) \
}
#define INB_NIBBLE_L MS_PARAM(3, 2, MS_TYP_PTR)
#define INB_NIBBLE_H MS_PARAM(6, 2, MS_TYP_PTR)
#define INB_NIBBLE_F MS_PARAM(9, 0, MS_TYP_FUN)
#define INB_NIBBLE_P MS_PARAM(9, 1, MS_TYP_PTR)
/*
* 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())
*/
#define DECLARE_NIBBLE_INBYTE_SUBMICROSEQ \
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) \
}
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);
}
/*
* 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)
device_printf(vpo->vpo_dev,
"(disconnect) s1=0x%x s2=0x%x, s3=0x%x\n",
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)
device_printf(vpo->vpo_dev,
"(connect) s1=0x%x s2=0x%x, s3=0x%x\n",
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);
vpo->vpo_mode_found = VP0_MODE_UNDEFINED;
error = 1;
/* try to enter EPP mode since vpoio failure put the bus in NIBBLE */
if (ppb_set_mode(ppbus, PPB_EPP) != -1) {
imm_connect(vpo, PPB_DONTWAIT, &error, 0);
}
/* if connection failed try PS/2 then NIBBLE modes */
if (error) {
if (ppb_set_mode(ppbus, PPB_PS2) != -1) {
imm_connect(vpo, PPB_DONTWAIT, &error, 0);
}
if (error) {
if (ppb_set_mode(ppbus, PPB_NIBBLE) != -1) {
imm_connect(vpo, PPB_DONTWAIT, &error, 0);
if (error)
goto error;
vpo->vpo_mode_found = VP0_MODE_NIBBLE;
} else {
device_printf(vpo->vpo_dev,
"NIBBLE mode unavailable!\n");
goto error;
}
} else {
vpo->vpo_mode_found = VP0_MODE_PS2;
}
} else {
vpo->vpo_mode_found = VP0_MODE_EPP;
}
/* 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)
device_printf(vpo->vpo_dev,
"can't disconnect from the drive\n");
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.
*
*/
static char
imm_wait(struct vpoio_data *vpo, int tmo)
{
DECLARE_WAIT_MICROSEQUENCE;
device_t ppbus = device_get_parent(vpo->vpo_dev);
int ret, err;
/*
* 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_MS_init_msq(wait_microseq, 2,
WAIT_RET, (void *)&ret,
WAIT_TMO, tmo);
ppb_MS_microseq(ppbus, vpo->vpo_dev, wait_microseq, &err);
if (err)
return (0); /* command timed out */
return(ret);
}
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)
{
DECLARE_NIBBLE_INBYTE_SUBMICROSEQ;
device_t ppbus = device_get_parent(vpo->vpo_dev);
int error = 0;
/*
* 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));
ppb_MS_init_msq(vpo->vpo_nibble_inbyte_msq, 4,
INB_NIBBLE_H, (void *)&(vpo)->vpo_nibble.h,
INB_NIBBLE_L, (void *)&(vpo)->vpo_nibble.l,
INB_NIBBLE_F, nibble_inbyte_hook,
INB_NIBBLE_P, (void *)&(vpo)->vpo_nibble);
/*
* Initialize mode dependent in/out microsequences
*/
ppb_lock(ppbus);
if ((error = ppb_request_bus(ppbus, vpo->vpo_dev, PPB_WAIT)))
goto error;
/* ppbus automatically restore the last mode entered during detection */
switch (vpo->vpo_mode_found) {
case VP0_MODE_EPP:
ppb_MS_GET_init(ppbus, vpo->vpo_dev, epp17_instr);
ppb_MS_PUT_init(ppbus, vpo->vpo_dev, epp17_outstr);
device_printf(vpo->vpo_dev, "EPP mode\n");
break;
case VP0_MODE_PS2:
ppb_MS_GET_init(ppbus, vpo->vpo_dev, ps2_inbyte_submicroseq);
ppb_MS_PUT_init(ppbus, vpo->vpo_dev, spp_outbyte_submicroseq);
device_printf(vpo->vpo_dev, "PS2 mode\n");
break;
case VP0_MODE_NIBBLE:
ppb_MS_GET_init(ppbus, vpo->vpo_dev, vpo->vpo_nibble_inbyte_msq);
ppb_MS_PUT_init(ppbus, vpo->vpo_dev, spp_outbyte_submicroseq);
device_printf(vpo->vpo_dev, "NIBBLE mode\n");
break;
default:
panic("imm: unknown mode %d", vpo->vpo_mode_found);
}
ppb_release_bus(ppbus, vpo->vpo_dev);
error:
ppb_unlock(ppbus);
return (error);
}
/*
* 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 to upper SCSI code :^(
*/
if ((error = imm_connect(vpo, PPB_WAIT|PPB_INTR, ¬_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;
}
/* Experience showed that we should discard this */
if (h == (char) -1)
h = 0;
*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);
}