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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>
bool pc386_ide_show;
/* #define DEBUG_OUT */
static bool pc386_ide_status_busy (uint32_t port,
uint32_t timeout,
uint8_t* status_val)
{
do
{
inport_byte (port + IDE_REGISTER_STATUS, *status_val);
if ((*status_val & IDE_REGISTER_STATUS_BSY) == 0)
return true;
if (timeout)
{
timeout--;
rtems_task_wake_after (TOD_MICROSECONDS_TO_TICKS (1000));
}
}
while (timeout);
return false;
}
static bool pc386_ide_status_data_ready (uint32_t port,
uint32_t timeout,
uint8_t* status_val)
{
do
{
inport_byte (port + IDE_REGISTER_STATUS, *status_val);
if (((*status_val & IDE_REGISTER_STATUS_BSY) == 0) &&
(*status_val & IDE_REGISTER_STATUS_DRQ))
return true;
if (timeout)
{
timeout--;
rtems_task_wake_after (TOD_MICROSECONDS_TO_TICKS (1000));
}
}
while (timeout);
return false;
}
/*
* support functions for IDE harddisk IF
*/
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
bool 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 |
\*=========================================================================*/
{
bool ide_card_plugged = true; /* assume: we have a disk here */
return ide_card_plugged;
}
static void wait(volatile uint32_t loops)
{
while (loops)
loops--;
}
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
void pc386_ide_initialize
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| initialize IDE access |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
int minor /* controller minor number */
)
/*-------------------------------------------------------------------------*\
| Return Value: |
| <none> |
\*=========================================================================*/
{
uint32_t port = IDE_Controller_Table[minor].port1;
uint8_t dev = 0;
if (pc386_ide_show)
printk("IDE%d: port base: %04x\n", minor, port);
outport_byte(port+IDE_REGISTER_DEVICE_HEAD,
(dev << IDE_REGISTER_DEVICE_HEAD_DEV_POS) | 0xE0);
wait(10000);
outport_byte(port+IDE_REGISTER_DEVICE_CONTROL,
IDE_REGISTER_DEVICE_CONTROL_SRST | IDE_REGISTER_DEVICE_CONTROL_nIEN);
wait(10000);
outport_byte(port+IDE_REGISTER_DEVICE_CONTROL,
IDE_REGISTER_DEVICE_CONTROL_nIEN);
wait(10000);
for (dev = 0; dev < 2; dev++)
{
uint32_t byte;
uint8_t status;
uint8_t error;
uint8_t cyllsb;
uint8_t cylmsb;
const char* label = dev ? " slave" : "master";
char model_number[41];
char* p = &model_number[0];
memset(model_number, 0, sizeof(model_number));
outport_byte(port+IDE_REGISTER_DEVICE_HEAD,
(dev << IDE_REGISTER_DEVICE_HEAD_DEV_POS) | 0xE0);
/*
outport_byte(port+IDE_REGISTER_SECTOR_NUMBER,
(dev << IDE_REGISTER_DEVICE_HEAD_DEV_POS) | IDE_REGISTER_LBA3_L);
*/
outport_byte(port+IDE_REGISTER_COMMAND, 0x00);
if (!pc386_ide_status_busy (port, 6000, &status))
continue;
inport_byte(port+IDE_REGISTER_STATUS, status);
inport_byte(port+IDE_REGISTER_ERROR, error);
inport_byte(port+IDE_REGISTER_CYLINDER_LOW, cyllsb);
inport_byte(port+IDE_REGISTER_CYLINDER_HIGH, cylmsb);
if (pc386_ide_show)
{
printk("IDE%d:%s: status=%02x\n", minor, label, status);
printk("IDE%d:%s: error=%02x\n", minor, label, error);
printk("IDE%d:%s: cylinder-low=%02x\n", minor, label, cyllsb);
printk("IDE%d:%s: cylinder-high=%02x\n", minor, label, cylmsb);
}
#if 0
/*
* Filter based on the cylinder values and the status.
* Taken from grub's ata.c.
*/
if (cyllsb != 0x14 || cylmsb != 0xeb)
if (status == 0 || (cyllsb != 0 && cylmsb != 0 &&
cyllsb != 0xc3 && cylmsb != 0x3c))
{
if (pc386_ide_show)
printk("IDE%d:%s: bad device\n", minor, label);
}
#endif
outport_byte(port+IDE_REGISTER_COMMAND, 0xec);
if (!pc386_ide_status_busy (port, 6000, &status))
{
if (pc386_ide_show)
printk("IDE%d:%s: device busy: %02x\n", minor, label, status);
continue;
}
byte = 0;
while (byte < 512)
{
uint16_t word;
bool data_ready;
if (pc386_ide_show && ((byte % 16) == 0))
printk("\n %04x : ", byte);
data_ready = pc386_ide_status_data_ready (port, 100, &status);
if (status & IDE_REGISTER_STATUS_ERR)
{
inport_byte(port+IDE_REGISTER_ERROR, error);
if (error != 4)
{
if (pc386_ide_show)
printk("IDE%d:%s: error=%04x\n", minor, label, error);
break;
}
/*
* The device is an ATAPI device.
*/
outport_byte(port+IDE_REGISTER_COMMAND, 0xa1);
continue;
}
if (!data_ready)
break;
inport_word(port+IDE_REGISTER_DATA, word);
if (pc386_ide_show)
printk ("%04x ", word);
if (byte >= 54 && byte < (54 + 40))
{
*p = word >> 8;
p++;
*p = word;
p++;
}
byte += 2;
}
if (pc386_ide_show)
printk("\nbytes read = %d\n", byte);
if (p != &model_number[0])
printk("IDE%d:%s: %s\n", minor, label, model_number);
}
/*
* 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,
rtems_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
int i32 = 0;
#endif
while (cnt < block_size)
{
if (!pc386_ide_status_data_ready (port, 100, &status_val))
{
printk ("pc386_ide_read_block: status=%02x, cnt=%d bs=%d\n", status_val, cnt, block_size);
/* FIXME: add an error here. */
return;
}
if (status_val & IDE_REGISTER_STATUS_ERR)
printk("pc386_ide_read_block: error: %02x\n", status_val);
inport_word(port+IDE_REGISTER_DATA,*lbuf);
#ifdef DEBUG_OUT
printk("%04x ",*lbuf);
i32++;
if (i32 >= 16)
{
printk("\n");
i32 = 0;
}
#endif
lbuf++;
cnt += sizeof(*lbuf);
(*pos) += sizeof(*lbuf);
if ((*pos) == llength) {
(*pos) = 0;
(*cbuf)++;
lbuf = bufs[(*cbuf)].buffer;
llength = bufs[(*cbuf)].length;
}
}
}
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
void pc386_ide_write_block
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| write a IDE controller data block |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
int minor,
uint16_t block_size,
rtems_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()\n");
#endif
while (cnt < block_size)
{
if (!pc386_ide_status_data_ready (port, 100, &status_val))
{
printk ("pc386_ide_write_block: status=%02x, cnt=%d bs=%d\n", status_val, cnt, block_size);
/* FIXME: add an error here. */
return;
}
if (status_val & IDE_REGISTER_STATUS_ERR)
printk("pc386_ide_write_block: error: %02x\n", status_val);
#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;
}
}
}
/*=========================================================================*\
| 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 */
uint16_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
};
|
