/*
* byte_1284_inbyte()
*
* Read 1 byte in BYTE mode
*/
int
byte_1284_inbyte(device_t bus, char *buffer)
{
int error = 0;
/* Event 7 - ready to take data (nAUTO low) */
ppb_wctr(bus, (PCD | nINIT | AUTOFEED) & ~(STROBE | SELECTIN));
/* Event 9 - peripheral set nAck low */
if ((error = do_1284_wait(bus, nACK, 0))) {
ppb_1284_set_error(bus, PPB_TIMEOUT, 9);
goto error;
}
/* read the byte */
*buffer = ppb_rdtr(bus);
/* Event 10 - data received, can't accept more */
ppb_wctr(bus, (nINIT) & ~(AUTOFEED | STROBE | SELECTIN));
/* Event 11 - peripheral ack */
if ((error = do_1284_wait(bus, nACK, nACK))) {
ppb_1284_set_error(bus, PPB_TIMEOUT, 11);
goto error;
}
/* Event 16 - strobe */
ppb_wctr(bus, (nINIT | STROBE) & ~(AUTOFEED | SELECTIN));
DELAY(3);
ppb_wctr(bus, (nINIT) & ~(AUTOFEED | STROBE | SELECTIN));
error:
return (error);
}
/*
* byte_peripheral_outbyte()
*
* Write 1 byte in BYTE mode
*/
static int
byte_peripheral_outbyte(device_t bus, char *buffer, int last)
{
int error = 0;
/* Event 7 */
if ((error = do_1284_wait(bus, nBUSY, nBUSY))) {
ppb_1284_set_error(bus, PPB_TIMEOUT, 7);
goto error;
}
/* check termination */
if (!(ppb_rstr(bus) & SELECT)) {
ppb_peripheral_terminate(bus, PPB_WAIT);
goto error;
}
/* Event 15 - put byte on data lines */
#ifdef DEBUG_1284
printf("B");
#endif
ppb_wdtr(bus, *buffer);
/* Event 9 */
ppb_wctr(bus, (AUTOFEED | STROBE) & ~(nINIT | SELECTIN));
/* Event 10 - wait data read */
if ((error = do_peripheral_wait(bus, nBUSY, 0))) {
ppb_1284_set_error(bus, PPB_TIMEOUT, 16);
goto error;
}
/* Event 11 */
if (!last) {
ppb_wctr(bus, (AUTOFEED) & ~(nINIT | STROBE | SELECTIN));
} else {
ppb_wctr(bus, (nINIT) & ~(STROBE | SELECTIN | AUTOFEED));
}
#if 0
/* Event 16 - wait strobe */
if ((error = do_peripheral_wait(bus, nACK | nBUSY, 0))) {
ppb_1284_set_error(bus, PPB_TIMEOUT, 16);
goto error;
}
#endif
/* check termination */
if (!(ppb_rstr(bus) & SELECT)) {
ppb_peripheral_terminate(bus, PPB_WAIT);
goto error;
}
error:
return (error);
}
static void
lpbb_setscl(device_t dev, int val)
{
device_t ppbus = device_get_parent(dev);
ppb_lock(ppbus);
if (val == 0)
ppb_wctr(ppbus, (u_char)(ppb_rctr(ppbus) & ~SCL_out));
else
ppb_wctr(ppbus, (u_char)(ppb_rctr(ppbus) | SCL_out));
ppb_unlock(ppbus);
}
/*
* ppb_1284_terminate()
*
* IEEE1284 termination phase, return code should ignored since the host
* is _always_ in compatible mode after ppb_1284_terminate()
*/
int
ppb_1284_terminate(device_t bus)
{
#ifdef DEBUG_1284
printf("T");
#endif
/* do not reset error here to keep the error that
* may occured before the ppb_1284_terminate() call */
ppb_1284_set_state(bus, PPB_TERMINATION);
#ifdef PERIPH_1284
/* request remote host attention */
ppb_wctr(bus, (nINIT | STROBE | SELECTIN) & ~(AUTOFEED));
DELAY(1);
#endif /* PERIPH_1284 */
/* Event 22 - set nSelectin low and nAutoFeed high */
ppb_wctr(bus, (nINIT | SELECTIN) & ~(STROBE | AUTOFEED));
/* Event 24 - waiting for peripheral, Xflag ignored */
if (do_1284_wait(bus, nACK | nBUSY | nFAULT, nFAULT)) {
ppb_1284_set_error(bus, PPB_TIMEOUT, 24);
goto error;
}
/* Event 25 - set nAutoFd low */
ppb_wctr(bus, (nINIT | SELECTIN | AUTOFEED) & ~STROBE);
/* Event 26 - compatible mode status is set */
/* Event 27 - peripheral set nAck high */
if (do_1284_wait(bus, nACK, nACK)) {
ppb_1284_set_error(bus, PPB_TIMEOUT, 27);
}
/* Event 28 - end termination, return to idle phase */
ppb_wctr(bus, (nINIT | SELECTIN) & ~(STROBE | AUTOFEED));
error:
/* return to compatible mode */
ppb_set_mode(bus, PPB_COMPATIBLE);
ppb_1284_set_state(bus, PPB_FORWARD_IDLE);
return (0);
}
/* Reset bus by setting SDA first and then SCL. */
static void
lpbb_reset_bus(device_t dev)
{
device_t ppbus = device_get_parent(dev);
ppb_assert_locked(ppbus);
ppb_wdtr(ppbus, (u_char)~SDA_out);
ppb_wctr(ppbus, (u_char)(ppb_rctr(ppbus) | SCL_out));
}
/*
* ppb_peripheral_terminate()
*
* Terminate peripheral transfer side
*
* Always return 0 in compatible mode
*/
int
ppb_peripheral_terminate(device_t bus, int how)
{
int error = 0;
#ifdef DEBUG_1284
printf("t");
#endif
ppb_1284_set_state(bus, PPB_PERIPHERAL_TERMINATION);
/* Event 22 - wait up to host response time (1s) */
if ((error = do_peripheral_wait(bus, SELECT | nBUSY, 0))) {
ppb_1284_set_error(bus, PPB_TIMEOUT, 22);
goto error;
}
/* Event 24 */
ppb_wctr(bus, (nINIT | STROBE) & ~(AUTOFEED | SELECTIN));
/* Event 25 - wait up to host response time (1s) */
if ((error = do_peripheral_wait(bus, nBUSY, nBUSY))) {
ppb_1284_set_error(bus, PPB_TIMEOUT, 25);
goto error;
}
/* Event 26 */
ppb_wctr(bus, (SELECTIN | nINIT | STROBE) & ~(AUTOFEED));
DELAY(1);
/* Event 27 */
ppb_wctr(bus, (SELECTIN | nINIT) & ~(STROBE | AUTOFEED));
/* Event 28 - wait up to host response time (1s) */
if ((error = do_peripheral_wait(bus, nBUSY, 0))) {
ppb_1284_set_error(bus, PPB_TIMEOUT, 28);
goto error;
}
error:
ppb_set_mode(bus, PPB_COMPATIBLE);
ppb_1284_set_state(bus, PPB_FORWARD_IDLE);
return (0);
}
/*
* nibble_1284_inbyte()
*
* Read 1 byte in NIBBLE mode
*/
int
nibble_1284_inbyte(device_t bus, char *buffer)
{
char nibble[2];
int i, error;
for (i = 0; i < 2; i++) {
/* Event 7 - ready to take data (nAUTO low) */
ppb_wctr(bus, (nINIT | AUTOFEED) & ~(STROBE | SELECTIN));
/* Event 8 - peripheral writes the first nibble */
/* Event 9 - peripheral set nAck low */
if ((error = do_1284_wait(bus, nACK, 0))) {
ppb_1284_set_error(bus, PPB_TIMEOUT, 9);
goto error;
}
/* read nibble */
nibble[i] = ppb_rstr(bus);
/* Event 10 - ack, nibble received */
ppb_wctr(bus, nINIT & ~(AUTOFEED | STROBE | SELECTIN));
/* Event 11 - wait ack from peripherial */
if ((error = do_1284_wait(bus, nACK, nACK))) {
ppb_1284_set_error(bus, PPB_TIMEOUT, 11);
goto error;
}
}
*buffer = ((nibble2char(nibble[1]) << 4) & 0xf0) |
(nibble2char(nibble[0]) & 0x0f);
error:
return (error);
}
/*
* byte_peripheral_write()
*
* Write n bytes in BYTE mode
*/
int
byte_peripheral_write(device_t bus, char *buffer, int len, int *sent)
{
int error = 0, i;
char r;
ppb_1284_set_state(bus, PPB_PERIPHERAL_TRANSFER);
/* wait forever, the remote host is master and should initiate
* termination
*/
for (i=0; i<len; i++) {
/* force remote nFAULT low to release the remote waiting
* process, if any
*/
r = ppb_rctr(bus);
ppb_wctr(bus, r & ~nINIT);
#ifdef DEBUG_1284
printf("y");
#endif
/* Event 7 */
error = ppb_poll_bus(bus, PPB_FOREVER, nBUSY, nBUSY,
PPB_INTR);
if (error && error != EWOULDBLOCK)
goto error;
#ifdef DEBUG_1284
printf("b");
#endif
if ((error = byte_peripheral_outbyte(bus, buffer+i, (i == len-1))))
goto error;
}
error:
if (!error)
ppb_1284_set_state(bus, PPB_PERIPHERAL_IDLE);
*sent = i;
return (error);
}
/*
* vpoio_do_scsi()
*
* Send an SCSI command
*
*/
int
vpoio_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;
register int k;
/*
* 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 = vpoio_connect(vpo, PPB_WAIT|PPB_INTR)))
return (error);
if (!vpoio_in_disk_mode(vpo)) {
*ret = VP0_ECONNECT;
goto error;
}
if ((*ret = vpoio_select(vpo,host,target)))
goto error;
/*
* Send the command ...
*
* set H_SELIN low for vpoio_wait().
*/
ppb_wctr(ppbus, H_AUTO | H_nSELIN | H_INIT | H_STROBE);
for (k = 0; k < clen; k++) {
if (vpoio_wait(vpo, VP0_FAST_SPINTMO) != (char)0xe0) {
*ret = VP0_ECMD_TIMEOUT;
goto error;
}
if (vpoio_outstr(vpo, &command[k], 1)) {
*ret = VP0_EPPDATA_TIMEOUT;
goto error;
}
}
/*
* Completion ...
*/
*count = 0;
for (;;) {
if (!(r = vpoio_wait(vpo, VP0_LOW_SPINTMO))) {
*ret = VP0_ESTATUS_TIMEOUT;
goto error;
}
/* stop when the ZIP wants to send status */
if (r == (char)0xf0)
break;
if (*count >= blen) {
*ret = VP0_EDATA_OVERFLOW;
goto error;
}
/* if in EPP mode or writing bytes, try to transfer a sector
* otherwise, just send one byte
*/
if (PPB_IN_EPP_MODE(ppbus) || r == (char)0xc0)
len = (((blen - *count) >= VP0_SECTOR_SIZE)) ?
VP0_SECTOR_SIZE : 1;
else
len = 1;
/* ZIP wants to send data? */
if (r == (char)0xc0)
error = vpoio_outstr(vpo, &buffer[*count], len);
else
error = vpoio_instr(vpo, &buffer[*count], len);
if (error) {
*ret = error;
goto error;
}
*count += len;
}
if (vpoio_instr(vpo, &l, 1)) {
*ret = VP0_EOTHER;
goto error;
}
/* check if the ZIP wants to send more status */
if (vpoio_wait(vpo, VP0_FAST_SPINTMO) == (char)0xf0)
if (vpoio_instr(vpo, &h, 1)) {
*ret = VP0_EOTHER + 2;
goto error;
}
*result = ((int) h << 8) | ((int) l & 0xff);
error:
/* return to printer state, release the ppbus */
vpoio_disconnect(vpo);
return (0);
}
/*
* ppb_1284_negociate()
*
* IEEE1284 negociation phase
*
* Normal nibble mode or request device id mode (see ppb_1284.h)
*
* After negociation, nFAULT is low if data is available
*/
int
ppb_1284_negociate(device_t bus, int mode, int options)
{
int error;
int request_mode;
#ifdef DEBUG_1284
printf("n");
#endif
if (ppb_1284_get_state(bus) >= PPB_PERIPHERAL_NEGOCIATION)
ppb_peripheral_terminate(bus, PPB_WAIT);
if (ppb_1284_get_state(bus) != PPB_FORWARD_IDLE)
ppb_1284_terminate(bus);
#ifdef DEBUG_1284
printf("%d", mode);
#endif
/* ensure the host is in compatible mode */
ppb_set_mode(bus, PPB_COMPATIBLE);
/* reset error to catch the actual negociation error */
ppb_1284_reset_error(bus, PPB_FORWARD_IDLE);
/* calculate ext. value */
request_mode = ppb_request_mode(mode, options);
/* default state */
ppb_wctr(bus, (nINIT | SELECTIN) & ~(STROBE | AUTOFEED));
DELAY(1);
/* enter negociation phase */
ppb_1284_set_state(bus, PPB_NEGOCIATION);
/* Event 0 - put the exten. value on the data lines */
ppb_wdtr(bus, request_mode);
#ifdef PERIPH_1284
/* request remote host attention */
ppb_wctr(bus, (nINIT | STROBE) & ~(AUTOFEED | SELECTIN));
DELAY(1);
ppb_wctr(bus, (nINIT) & ~(STROBE | AUTOFEED | SELECTIN));
#else
DELAY(1);
#endif /* !PERIPH_1284 */
/* Event 1 - enter IEEE1284 mode */
ppb_wctr(bus, (nINIT | AUTOFEED) & ~(STROBE | SELECTIN));
#ifdef PERIPH_1284
/* ignore the PError line, wait a bit more, remote host's
* interrupts don't respond fast enough */
if (ppb_poll_bus(bus, 40, nACK | SELECT | nFAULT,
SELECT | nFAULT, PPB_NOINTR | PPB_POLL)) {
ppb_1284_set_error(bus, PPB_NOT_IEEE1284, 2);
error = ENODEV;
goto error;
}
#else
/* Event 2 - trying IEEE1284 dialog */
if (do_1284_wait(bus, nACK | PERROR | SELECT | nFAULT,
PERROR | SELECT | nFAULT)) {
ppb_1284_set_error(bus, PPB_NOT_IEEE1284, 2);
error = ENODEV;
goto error;
}
#endif /* !PERIPH_1284 */
/* Event 3 - latch the ext. value to the peripheral */
ppb_wctr(bus, (nINIT | STROBE | AUTOFEED) & ~SELECTIN);
DELAY(1);
/* Event 4 - IEEE1284 device recognized */
ppb_wctr(bus, nINIT & ~(SELECTIN | AUTOFEED | STROBE));
/* Event 6 - waiting for status lines */
if (do_1284_wait(bus, nACK, nACK)) {
ppb_1284_set_error(bus, PPB_TIMEOUT, 6);
error = EBUSY;
goto error;
}
/* Event 7 - quering result consider nACK not to misunderstand
* a remote computer terminate sequence */
if (options & PPB_EXTENSIBILITY_LINK) {
/* XXX not fully supported yet */
ppb_1284_terminate(bus);
return (0);
}
if (request_mode == NIBBLE_1284_NORMAL) {
if (do_1284_wait(bus, nACK | SELECT, nACK)) {
ppb_1284_set_error(bus, PPB_MODE_UNSUPPORTED, 7);
error = ENODEV;
goto error;
}
} else {
if (do_1284_wait(bus, nACK | SELECT, SELECT | nACK)) {
ppb_1284_set_error(bus, PPB_MODE_UNSUPPORTED, 7);
error = ENODEV;
goto error;
}
}
switch (mode) {
case PPB_NIBBLE:
case PPB_PS2:
/* enter reverse idle phase */
ppb_1284_set_state(bus, PPB_REVERSE_IDLE);
break;
case PPB_ECP:
/* negociation ok, now setup the communication */
ppb_1284_set_state(bus, PPB_SETUP);
ppb_wctr(bus, (nINIT | AUTOFEED) & ~(SELECTIN | STROBE));
#ifdef PERIPH_1284
/* ignore PError line */
if (do_1284_wait(bus, nACK | SELECT | nBUSY,
nACK | SELECT | nBUSY)) {
ppb_1284_set_error(bus, PPB_TIMEOUT, 30);
error = ENODEV;
goto error;
}
#else
if (do_1284_wait(bus, nACK | SELECT | PERROR | nBUSY,
nACK | SELECT | PERROR | nBUSY)) {
ppb_1284_set_error(bus, PPB_TIMEOUT, 30);
error = ENODEV;
goto error;
}
#endif /* !PERIPH_1284 */
/* ok, the host enters the ForwardIdle state */
ppb_1284_set_state(bus, PPB_ECP_FORWARD_IDLE);
break;
case PPB_EPP:
ppb_1284_set_state(bus, PPB_EPP_IDLE);
break;
default:
panic("%s: unknown mode (%d)!", __func__, mode);
}
ppb_set_mode(bus, mode);
return (0);
error:
ppb_1284_terminate(bus);
return (error);
}
/*
* ppb_peripheral_negociate()
*
* Negociate the peripheral side
*/
int
ppb_peripheral_negociate(device_t bus, int mode, int options)
{
int spin, request_mode, error = 0;
char r;
ppb_set_mode(bus, PPB_COMPATIBLE);
ppb_1284_set_state(bus, PPB_PERIPHERAL_NEGOCIATION);
/* compute ext. value */
request_mode = ppb_request_mode(mode, options);
/* wait host */
spin = 10;
while (spin-- && (ppb_rstr(bus) & nBUSY))
DELAY(1);
/* check termination */
if (!(ppb_rstr(bus) & SELECT) || !spin) {
error = ENODEV;
goto error;
}
/* Event 4 - read ext. value */
r = ppb_rdtr(bus);
/* nibble mode is not supported */
if ((r == (char)request_mode) ||
(r == NIBBLE_1284_NORMAL)) {
/* Event 5 - restore direction bit, no data avail */
ppb_wctr(bus, (STROBE | nINIT) & ~(SELECTIN));
DELAY(1);
/* Event 6 */
ppb_wctr(bus, (nINIT) & ~(SELECTIN | STROBE));
if (r == NIBBLE_1284_NORMAL) {
#ifdef DEBUG_1284
printf("R");
#endif
ppb_1284_set_error(bus, PPB_MODE_UNSUPPORTED, 4);
error = EINVAL;
goto error;
} else {
ppb_1284_set_state(bus, PPB_PERIPHERAL_IDLE);
switch (r) {
case BYTE_1284_NORMAL:
ppb_set_mode(bus, PPB_BYTE);
break;
default:
break;
}
#ifdef DEBUG_1284
printf("A");
#endif
/* negociation succeeds */
}
} else {
/* Event 5 - mode not supported */
ppb_wctr(bus, SELECTIN);
DELAY(1);
/* Event 6 */
ppb_wctr(bus, (SELECTIN) & ~(STROBE | nINIT));
ppb_1284_set_error(bus, PPB_MODE_UNSUPPORTED, 4);
#ifdef DEBUG_1284
printf("r");
#endif
error = EINVAL;
goto error;
}
return (0);
error:
ppb_peripheral_terminate(bus, PPB_WAIT);
return (error);
}
