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2008-05-07 Till Straumann <strauman@slac.stanford.edu>

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PR 649/bsps
	* libchip/ide/ata.c: Give up if the interface does not become ready.
This commit is contained in:
Joel Sherrill
2008-05-07 20:49:05 +00:00
parent 9b949dddef
commit 89d190339d
2 changed files with 23 additions and 0 deletions
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5
c/src/ChangeLog
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@@ -1,3 +1,8 @@
2008-05-07 Till Straumann <strauman@slac.stanford.edu>
PR 649/bsps
* libchip/ide/ata.c: Give up if the interface does not become ready.
2008-04-25 Joel Sherrill <joel.sherrill@OARcorp.com>
Moved to cpukit.

18
c/src/libchip/ide/ata.c
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@@ -1405,6 +1405,7 @@ ata_process_request_on_init_phase(rtems_device_minor_number ctrl_minor,
uint16_t data_bs; /* the number of 512 bytes sectors into one
* data block
*/
unsigned retries;
assert(areq);
dev = areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] &
@@ -1416,8 +1417,25 @@ ata_process_request_on_init_phase(rtems_device_minor_number ctrl_minor,
ide_controller_write_register(ctrl_minor, IDE_REGISTER_DEVICE_HEAD,
areq->regs.regs[IDE_REGISTER_DEVICE_HEAD]);
retries = 0;
do {
ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, &byte);
/* If device (on INIT, i.e. it should be idle) is neither
* busy nor ready something's fishy, i.e., there is probably
* no device present.
* I'd like to do a proper timeout but don't know of a portable
* timeout routine (w/o using multitasking / rtems_task_wake_after())
*/
if ( ! (byte & (IDE_REGISTER_STATUS_BSY | IDE_REGISTER_STATUS_DRDY)))
retries++;
else
retries=0;
if ( 10000 == retries ) {
/* probably no drive connected */
areq->breq->status = RTEMS_UNSATISFIED;
areq->breq->error = RTEMS_IO_ERROR;
return;
}
} while ((byte & IDE_REGISTER_STATUS_BSY) ||
(!(byte & IDE_REGISTER_STATUS_DRDY)));