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[kernel] Update idequery.c to same version as TLVC
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ghaerr committed Oct 22, 2024
1 parent 1bcdc74 commit 7dd2883
Showing 1 changed file with 41 additions and 45 deletions.
86 changes: 41 additions & 45 deletions elks/arch/i86/drivers/block/idequery.c
Original file line number Diff line number Diff line change
Expand Up @@ -8,25 +8,26 @@
#include <linuxmt/init.h>
#include <linuxmt/kernel.h>
#include <linuxmt/heap.h>
#include <linuxmt/config.h>
#include <linuxmt/debug.h>
#include <arch/ports.h>
#include <arch/io.h>
#include "blk.h"

#define IDE_DRIVE_ID 0xec /* IDE command to get access to drive data */
#define IDE_STATUS 7 /* get drive status */
#define IDE_ERROR 1
#define WAIT_READY (3*HZ/100) /* 3/100 sec = 30msec - should be instantaneous */
#define WAIT_READY (30*HZ/100) /* 30/100 sec = 300msec */

#define IDE_DEBUG 0 /* IDE probe debugging */

/* For IDE/ATA access */
#define STATUS(port) inb_p(port + IDE_STATUS)
#define ERROR(port) inb_p(port + IDE_ERROR)
#define WAITING(port) (STATUS(port) & 0x80) == 0x80

#if IDE_DEBUG
#define debug printk
#define ide_debug printk
#else
#define debug(...)
#define ide_debug(...)
#endif

static int io_ports[2] = { HD1_PORT, HD2_PORT }; /* physical port addresses */
Expand All @@ -42,12 +43,8 @@ static void INITPROC out_hd(int drive, word_t cmd)
{
word_t port = io_ports[drive >> 1];

outb(0xff, ++port); /* Feature set, should not matter */
outb_p(0, ++port);
outb_p(0, ++port);
outb_p(0, ++port);
outb_p(0, ++port);
outb_p(0xA0 | ((drive & 1) << 4), ++port);
port += 6;
outb_p(0xA0 | ((drive & 1) << 4), port);
outb_p(cmd, ++port);
}

Expand All @@ -74,76 +71,75 @@ static void INITPROC dump_ide(word_t *buffer, int size) {
int INITPROC get_ide_data(int drive, struct drive_infot *drivep) {

word_t port = io_ports[drive >> 1];
int retval = -1;
int retval = -1, i;

word_t *ide_buffer = (word_t *)heap_alloc(512, 0);
word_t *ide_buffer = (word_t *)heap_alloc(512, HEAP_TAG_DRVR);
if (!ide_buffer) return -1;

while (1) {
unsigned long timeout = jiffies + WAIT_READY; /* 30 ms */
unsigned long timeout = jiffies + WAIT_READY;
out_hd(drive, IDE_DRIVE_ID);
while ((STATUS(port) & 0x80) == 0x80) { /* wait 30ms until not busy */
while ((STATUS(port) & 0x80) == 0x80) { /* wait 300ms until not busy */
if (time_after(jiffies, timeout))
goto out; /* timeout */
}

if ((STATUS(port) & 1) == 1) {
i = STATUS(port);
if (!i || (i & 1) == 1) {
/* Error - drive not found or non-IDE.
* If drive # is 2 it may actually be physical drive 3 -
* slave, not master. Take another round to check.
* NOTE: If drive # is 2 (i.e. 2nd controller) is missing,
* there may be a 3rd (slave) drive.
*/
if (drive == 2) {
drive++;
continue;
}
debug("hd%c: drive at port 0x%x not found\n", 'a'+drive, port);
ide_debug("hd%c: drive at port 0x%x not found\n", 'a'+drive, port);
break;
}

insw(port, ide_buffer, 512/2); /* read - word size */

/*
* Sanity check: Head, cyl and sector values must be other than
* 0 and buffer has to contain valid data (first entry in buffer
* must be != 0).
*
* Using 'current' CHS values from the ID data (words 54, 55 & 56),
* Using 'actual' CHS values from the ID data (words 54, 55 & 56),
* considered more reliable than 'default' CHS values (words 1, 3 & 6).
* The difference is that some devices have selectable translation modes,
* which is reflected in 'current' values. ELKS does not use translation
* which is reflected in 'actual' values. ELKS does not use translation
* modes, so they are always the same.
* Check for large # of cyls to detect (and skip) ATAPI CDROMs.
* HS sep2020
*/

/* this is the real sanity check */
if ((ide_buffer[54] < 34096) && (ide_buffer[0] != 0)
&& (ide_buffer[54] != 0) && (ide_buffer[55] != 0)
&& (ide_buffer[55] < 256)
&& (ide_buffer[56] != 0) && (ide_buffer[56] < 64)) {
if ((ide_buffer[1] < 34096) && (*ide_buffer != 0)
&& (ide_buffer[1] != 0) && (ide_buffer[3] != 0) && (ide_buffer[3] < 256)
&& (ide_buffer[6] != 0) && (ide_buffer[6] < 64)) {
#if IDE_DEBUG
ide_buffer[20] = 0; /* String termination */
printk("IDE default CHS: %d/%d/%d serial %s\n",
ide_buffer[1], ide_buffer[3], ide_buffer[6], &ide_buffer[10]);
printk(" IDE default CHS: %d/%d/%d serial %s\n", ide_buffer[1], ide_buffer[3],
ide_buffer[6], &ide_buffer[10]);
#endif
drivep->cylinders = ide_buffer[54];
drivep->heads = ide_buffer[55];
drivep->sectors = ide_buffer[56];

/* Note: If the 3rd drive is slave, not master, it will be reported as
* hdd, not hdc here. */
debug("hd%c: %d heads, %d cylinders, %d sectors\n", 'a'+drive,
drivep->heads, drivep->cylinders, drivep->sectors);
if (ide_buffer[53]&1) { /* if set, the 'actual' data are valid */
/* Old IDE drives don't support 'actual data' */
drivep->cylinders = ide_buffer[54];
drivep->heads = ide_buffer[55];
drivep->sectors = ide_buffer[56];
} else {
drivep->cylinders = ide_buffer[1];
drivep->heads = ide_buffer[3];
drivep->sectors = ide_buffer[6];
}
ide_debug("hd%c: %d heads, %d cylinders, %d sectors\n", 'a'+drive,
drivep->heads, drivep->cylinders, drivep->sectors);
retval = 0;
} else {
#if IDE_DEBUG
printk("hd%c: Error in IDE device data.\n", 'a'+drive);
dump_ide(ide_buffer, 256);
#endif
retval = -2;
ide_debug("hd%c: Error in IDE device data.\n", 'a'+drive);
}
break;
}
out:
#if IDE_DEBUG
if (retval != -1) dump_ide(ide_buffer, 128);
#endif
heap_free(ide_buffer);

return retval;
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