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|
/*===============================================================*\
| Project: RTEMS PC386 IDE harddisc driver |
+-----------------------------------------------------------------+
| File: ide.c |
+-----------------------------------------------------------------+
| Copyright (c) 2003 IMD |
| Ingenieurbuero fuer Microcomputertechnik Th. Doerfler |
| <Thomas.Doerfler@imd-systems.de> |
| all rights reserved |
+-----------------------------------------------------------------+
| this file contains the BSP layer for IDE access below the |
| libchip IDE harddisc driver |
| based on a board specific driver from |
| Eugeny S. Mints, Oktet |
| |
| The license and distribution terms for this file may be |
| found in the file LICENSE in this distribution or at |
| http://www.rtems.com/license/LICENSE. |
| |
+-----------------------------------------------------------------+
| date history ID |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 01.14.03 creation doe |
\*===============================================================*/
#include <rtems.h>
#include <bsp.h>
#include <libchip/ide_ctrl.h>
#include <libchip/ide_ctrl_cfg.h>
#include <libchip/ide_ctrl_io.h>
/* #define DEBUG_OUT */
/*
* support functions for IDE harddisk IF
*/
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
boolean pc386_ide_probe
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| This function should probe, whether a IDE disk is available |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
int minor
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| TRUE, when flash disk available |
\*=========================================================================*/
{
boolean ide_card_plugged = TRUE; /* assume: we have a disk here */
return ide_card_plugged;
}
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
void pc386_ide_initialize
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| initialize IDE access |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
int minor /* controller minor number */
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| <none> |
\*=========================================================================*/
{
/*
* FIXME: enable interrupts, if needed
*/
}
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
void pc386_ide_read_reg
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| read a IDE controller register |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
int minor, /* controller minor number */
int reg, /* register index to access */
uint16_t *value /* ptr to return value location */
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| <none> |
\*=========================================================================*/
{
uint32_t port = IDE_Controller_Table[minor].port1;
uint8_t bval1,bval2;
if (reg == IDE_REGISTER_DATA_WORD) {
inport_byte(port+reg, bval1);
inport_byte(port+reg+1, bval2);
*value = bval1 + (bval2 << 8);
}
else {
inport_byte(port+reg, bval1);
*value = bval1;
}
#ifdef DEBUG_OUT
printk("pc386_ide_read_reg (0x%x)=0x%x\r\n",reg,*value & 0xff);
#endif
}
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
void pc386_ide_write_reg
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| write a IDE controller register |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
int minor, /* controller minor number */
int reg, /* register index to access */
uint16_t value /* value to write */
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| <none> |
\*=========================================================================*/
{
uint32_t port = IDE_Controller_Table[minor].port1;
#ifdef DEBUG_OUT
printk("pc386_ide_write_reg(0x%x,0x%x)\r\n",reg,value & 0xff);
#endif
if (reg == IDE_REGISTER_DATA_WORD) {
outport_word(port+reg,value);
}
else {
outport_byte(port+reg,value);
}
}
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
void pc386_ide_read_block
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| read a IDE controller data block |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
int minor,
uint16_t block_size,
blkdev_sg_buffer *bufs,
uint32_t *cbuf,
uint32_t *pos
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| <none> |
\*=========================================================================*/
{
uint32_t port = IDE_Controller_Table[minor].port1;
uint16_t cnt = 0;
uint32_t llength = bufs[(*cbuf)].length;
uint8_t status_val;
uint16_t *lbuf = (uint16_t*)
((uint8_t*)(bufs[(*cbuf)].buffer) + (*pos));
inport_byte(port+IDE_REGISTER_STATUS,status_val);
while ((status_val & IDE_REGISTER_STATUS_DRQ) &&
(cnt < block_size)) {
inport_word(port+IDE_REGISTER_DATA,*lbuf);
#ifdef DEBUG_OUT
printk("0x%x ",*lbuf);
#endif
lbuf++;
cnt += sizeof(*lbuf);
(*pos) += sizeof(*lbuf);
if ((*pos) == llength) {
(*pos) = 0;
(*cbuf)++;
lbuf = bufs[(*cbuf)].buffer;
llength = bufs[(*cbuf)].length;
}
inport_byte(port+IDE_REGISTER_STATUS,status_val);
}
#ifdef DEBUG_OUT
printk("pc386_ide_read_block()\r\n");
#endif
}
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
void pc386_ide_write_block
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| write a IDE controller data block |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
int minor,
uint16_t block_size,
blkdev_sg_buffer *bufs,
uint32_t *cbuf,
uint32_t *pos
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| <none> |
\*=========================================================================*/
{
uint32_t port = IDE_Controller_Table[minor].port1;
uint16_t cnt = 0;
uint32_t llength = bufs[(*cbuf)].length;
uint8_t status_val;
uint16_t *lbuf = (uint16_t*)
((uint8_t*)(bufs[(*cbuf)].buffer) + (*pos));
#ifdef DEBUG_OUT
printk("pc386_ide_write_block()\r\n");
#endif
inport_byte(port+IDE_REGISTER_STATUS,status_val);
while ((status_val & IDE_REGISTER_STATUS_DRQ) &&
(cnt < block_size)) {
#ifdef DEBUG_OUT
printk("0x%x ",*lbuf);
#endif
outport_word(port+IDE_REGISTER_DATA,*lbuf);
lbuf++;
cnt += sizeof(*lbuf);
(*pos) += sizeof(*lbuf);
if ((*pos) == llength) {
(*pos) = 0;
(*cbuf)++;
lbuf = bufs[(*cbuf)].buffer;
llength = bufs[(*cbuf)].length;
}
inport_byte(port+IDE_REGISTER_STATUS,status_val);
}
}
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
int pc386_ide_control
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| control interface for controller |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
int minor, /* controller minor number */
uint32_t cmd, /* command to send */
void * arg /* optional argument */
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| <none> |
\*=========================================================================*/
{
return 0;
}
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
rtems_status_code pc386_ide_config_io_speed
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| set up transfer speed, if possible |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
int minor, /* controller minor number */
uint8_t modes_avail /* optional argument */
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| rtems_status_code |
\*=========================================================================*/
{
return RTEMS_SUCCESSFUL;
}
/*
* The following table configures the functions used for IDE drivers
* in this BSP.
*/
ide_ctrl_fns_t pc386_ide_ctrl_fns = {
pc386_ide_probe,
pc386_ide_initialize,
pc386_ide_control,
pc386_ide_read_reg,
pc386_ide_write_reg,
pc386_ide_read_block,
pc386_ide_write_block,
pc386_ide_config_io_speed
};
|
