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/*
* Copyright (c) 2010 embedded brains GmbH.
*
* Copyright (C) 2001 OKTET Ltd., St.-Petersburg, Russia
* Authors: Eugeny S. Mints <Eugeny.Mints@oktet.ru>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include "ata_internal.h"
#include <assert.h>
#include <string.h>
#include <libchip/ide_ctrl_io.h>
#include <libchip/ide_ctrl_cfg.h>
/* ata_process_request_on_init_phase --
* Process the ATA request during system initialization. Request
* processing is syncronous and doesn't use multiprocessing enviroment.
*
* PARAMETERS:
* ctrl_minor - controller identifier
* areq - ATA request
*
* RETURNS:
* NONE
*/
void
ata_process_request_on_init_phase(rtems_device_minor_number ctrl_minor,
ata_req_t *areq)
{
uint16_t byte;/* emphasize that only 8 low bits is meaningful */
uint8_t i;
#if 0
uint8_t dev;
#endif
uint16_t val, val1;
volatile unsigned retries;
assert(areq);
#if 0
dev = areq->regs.regs[IDE_REGISTER_DEVICE_HEAD] &
IDE_REGISTER_DEVICE_HEAD_DEV;
#endif
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++;
if ( 10000 == retries ) {
/* probably no drive connected */
areq->breq->status = RTEMS_UNSATISFIED;
return;
}
}
} while ((byte & IDE_REGISTER_STATUS_BSY) ||
(!(byte & IDE_REGISTER_STATUS_DRDY)));
for (i=0; i< ATA_MAX_CMD_REG_OFFSET; i++)
{
uint32_t reg = (1 << i);
if (areq->regs.to_write & reg)
ide_controller_write_register(ctrl_minor, i,
areq->regs.regs[i]);
}
do {
ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, &byte);
} while (byte & IDE_REGISTER_STATUS_BSY);
ide_controller_read_register(ctrl_minor, IDE_REGISTER_STATUS, &val);
ide_controller_read_register(ctrl_minor, IDE_REGISTER_ERROR, &val1);
if (val & IDE_REGISTER_STATUS_ERR)
{
areq->breq->status = RTEMS_IO_ERROR;
return;
}
switch(areq->type)
{
case ATA_COMMAND_TYPE_PIO_IN:
if (areq->cnt)
{
int ccbuf = areq->cbuf;
ide_controller_read_data_block(ctrl_minor,
areq->breq->bufs[0].length * areq->cnt,
areq->breq->bufs, &areq->cbuf,
&areq->pos);
ccbuf = areq->cbuf - ccbuf;
areq->cnt -= ccbuf;
}
if (areq->cnt == 0)
{
areq->breq->status = RTEMS_SUCCESSFUL;
}
else
{
/*
* this shouldn't happend on the initialization
* phase!
*/
rtems_fatal_error_occurred(RTEMS_INTERNAL_ERROR);
}
break;
case ATA_COMMAND_TYPE_NON_DATA:
areq->breq->status = RTEMS_SUCCESSFUL;
areq->info = val1;
break;
default:
areq->breq->status = RTEMS_IO_ERROR;
break;
}
}
void ata_breq_init(blkdev_request1 *breq, uint16_t *sector_buffer)
{
memset(breq, 0, sizeof(*breq));
breq->req.done_arg = breq;
breq->req.bufnum = 1;
breq->req.bufs [0].length = ATA_SECTOR_SIZE;
breq->req.bufs [0].buffer = sector_buffer;
}
rtems_status_code ata_identify_device(
rtems_device_minor_number ctrl_minor,
int dev,
uint16_t *sector_buffer,
ata_dev_t *device_entry
)
{
ata_req_t areq;
blkdev_request1 breq;
ata_breq_init(&breq, sector_buffer);
/*
* Issue DEVICE IDENTIFY ATA command and get device
* configuration
*/
memset(&areq, 0, sizeof(ata_req_t));
areq.type = ATA_COMMAND_TYPE_PIO_IN;
areq.regs.to_write = ATA_REGISTERS_VALUE(IDE_REGISTER_COMMAND);
areq.regs.regs [IDE_REGISTER_COMMAND] = ATA_COMMAND_IDENTIFY_DEVICE;
areq.regs.to_read = ATA_REGISTERS_VALUE(IDE_REGISTER_STATUS);
areq.breq = (rtems_blkdev_request *)&breq;
areq.cnt = breq.req.bufnum;
areq.regs.regs [IDE_REGISTER_DEVICE_HEAD] |=
dev << IDE_REGISTER_DEVICE_HEAD_DEV_POS;
/*
* Process the request. Special processing of requests on
* initialization phase is needed because at this moment there
* is no multitasking enviroment
*/
ata_process_request_on_init_phase(ctrl_minor, &areq);
/* check status of I/O operation */
if (breq.req.status != RTEMS_SUCCESSFUL) {
return RTEMS_IO_ERROR;
}
/*
* Parse returned device configuration and fill in ATA internal
* device info structure
*/
device_entry->cylinders =
CF_LE_W(sector_buffer[ATA_IDENT_WORD_NUM_OF_CURR_LOG_CLNDS]);
device_entry->heads =
CF_LE_W(sector_buffer[ATA_IDENT_WORD_NUM_OF_CURR_LOG_HEADS]);
device_entry->sectors =
CF_LE_W(sector_buffer[ATA_IDENT_WORD_NUM_OF_CURR_LOG_SECS]);
device_entry->lba_sectors =
CF_LE_W(sector_buffer[ATA_IDENT_WORD_NUM_OF_USR_SECS1]);
device_entry->lba_sectors <<= 16;
device_entry->lba_sectors += CF_LE_W(sector_buffer[ATA_IDENT_WORD_NUM_OF_USR_SECS0]);
device_entry->lba_avaible =
(CF_LE_W(sector_buffer[ATA_IDENT_WORD_CAPABILITIES]) >> 9) & 0x1;
if ((CF_LE_W(sector_buffer[ATA_IDENT_WORD_FIELD_VALIDITY]) &
ATA_IDENT_BIT_VALID) == 0) {
/* no "supported modes" info -> use default */
device_entry->mode_active = ATA_MODES_PIO3;
} else {
device_entry->modes_available =
((CF_LE_W(sector_buffer[64]) & 0x1) ? ATA_MODES_PIO3 : 0) |
((CF_LE_W(sector_buffer[64]) & 0x2) ? ATA_MODES_PIO4 : 0) |
((CF_LE_W(sector_buffer[63]) & 0x1) ? ATA_MODES_DMA0 : 0) |
((CF_LE_W(sector_buffer[63]) & 0x2) ?
ATA_MODES_DMA0 | ATA_MODES_DMA1 : 0) |
((CF_LE_W(sector_buffer[63]) & 0x4) ?
ATA_MODES_DMA0 | ATA_MODES_DMA1 | ATA_MODES_DMA2 : 0);
if (device_entry->modes_available == 0) {
return RTEMS_IO_ERROR;
}
}
return RTEMS_SUCCESSFUL;
}
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