ide: add "cdrom=" and "chs=" parameters
* Add "cdrom=" and "chs=" parameters.
* Obsolete "hdx=cdrom" and "hdx=cyls,heads,sects" kernel parameters.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index d8f40ee..a4bceeec 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -924,7 +924,7 @@
drive->media = ide_cdrom;
/* an ATAPI device ignores DRDY */
drive->ready_stat = 0;
- goto done;
+ goto obsolete_option;
case -5: /* nodma */
drive->nodma = 1;
goto obsolete_option;
@@ -948,7 +948,7 @@
drive->sect = drive->bios_sect = vals[2];
drive->present = 1;
drive->forced_geom = 1;
- goto done;
+ goto obsolete_option;
default:
goto bad_option;
}
@@ -975,9 +975,6 @@
obsolete_option:
printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
return 1;
-done:
- printk("\n");
- return 1;
}
EXPORT_SYMBOL(ide_lock);
@@ -1167,6 +1164,51 @@
module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device");
+static unsigned int ide_cdroms;
+
+module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
+MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
+
+struct chs_geom {
+ unsigned int cyl;
+ u8 head;
+ u8 sect;
+};
+
+static unsigned int ide_disks;
+static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
+
+static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
+{
+ int a, b, c = 0, h = 0, s = 0, i, j = 1;
+
+ if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
+ sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
+ return -EINVAL;
+
+ i = a * MAX_DRIVES + b;
+
+ if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
+ return -EINVAL;
+
+ if (c > INT_MAX || h > 255 || s > 255)
+ return -EINVAL;
+
+ if (j)
+ ide_disks |= (1 << i);
+ else
+ ide_disks &= (1 << i);
+
+ ide_disks_chs[i].cyl = c;
+ ide_disks_chs[i].head = h;
+ ide_disks_chs[i].sect = s;
+
+ return 0;
+}
+
+module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
+MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
+
static void ide_dev_apply_params(ide_drive_t *drive)
{
int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
@@ -1189,6 +1231,25 @@
drive->name);
drive->bad_wstat = BAD_R_STAT;
}
+ if (ide_cdroms & (1 << i)) {
+ printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
+ drive->present = 1;
+ drive->media = ide_cdrom;
+ /* an ATAPI device ignores DRDY */
+ drive->ready_stat = 0;
+ }
+ if (ide_disks & (1 << i)) {
+ drive->cyl = drive->bios_cyl = ide_disks_chs[i].cyl;
+ drive->head = drive->bios_head = ide_disks_chs[i].head;
+ drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
+ drive->forced_geom = 1;
+ printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
+ drive->name,
+ drive->cyl, drive->head, drive->sect);
+ drive->present = 1;
+ drive->media = ide_disk;
+ drive->ready_stat = READY_STAT;
+ }
}
static unsigned int ide_ignore_cable;