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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-04-27 15:38:23 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-04-27 15:38:23 +0200
commit9fd91d959f1a19d1bfa46d97cbbbb55641ce26a6 (patch)
tree9938cfef8cce9dd87f48fe40b6bca51a1c737fc5 /drivers/ide
parent9c391bae6a65bd39962877ad7dc000b600757bbe (diff)
ide: add "ignore_cable" parameter (take 2)
Add "ignore_cable" parameter: * "ide_core.ignore_cable=[interface_number]" boot option if IDE is built-in (i.e. "ide_core.ignore_cable=1" to force ignoring cable for "ide1") * "ignore_cable=[interface_number]" module parameter (for ide_core module) if IDE is compiled as module v2: * Add ide_port_apply_params() helper - use it in ide_device_add_all() and ide_scan_port(). * Make it possible to later disable ignoring cable detection by passing "[interface_number]:0" to /sys/module/ide_core/parameters/ignore_cable (however sysfs interface is not enabled yet since it needs some other IDE changes to make it work reliable). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide')
-rw-r--r--drivers/ide/ide-probe.c10
-rw-r--r--drivers/ide/ide.c32
2 files changed, 41 insertions, 1 deletions
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index a4b65b321f5..4a33100a231 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1518,13 +1518,20 @@ int ide_device_add_all(u8 *idx, const struct ide_port_info *d)
int i, rc = 0;
for (i = 0; i < MAX_HWIFS; i++) {
- if (d == NULL || idx[i] == 0xff) {
+ if (idx[i] == 0xff) {
mate = NULL;
continue;
}
hwif = &ide_hwifs[idx[i]];
+ ide_port_apply_params(hwif);
+
+ if (d == NULL) {
+ mate = NULL;
+ continue;
+ }
+
if (d->chipset != ide_etrax100 && (i & 1) && mate) {
hwif->mate = mate;
mate->mate = hwif;
@@ -1621,6 +1628,7 @@ EXPORT_SYMBOL_GPL(ide_device_add);
void ide_port_scan(ide_hwif_t *hwif)
{
+ ide_port_apply_params(hwif);
ide_port_cable_detect(hwif);
ide_port_init_devices(hwif);
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index bced02f9f2c..6cd112cc4af 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -1239,6 +1239,38 @@ static void ide_port_class_release(struct device *portdev)
put_device(&hwif->gendev);
}
+static unsigned int ide_ignore_cable;
+
+static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
+{
+ int i, j = 1;
+
+ if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
+ return -EINVAL;
+
+ if (i >= MAX_HWIFS || j < 0 || j > 1)
+ return -EINVAL;
+
+ if (j)
+ ide_ignore_cable |= (1 << i);
+ else
+ ide_ignore_cable &= (1 << i);
+
+ return 0;
+}
+
+module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
+MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
+
+void ide_port_apply_params(ide_hwif_t *hwif)
+{
+ if (ide_ignore_cable & (1 << hwif->index)) {
+ printk(KERN_INFO "ide: ignoring cable detection for %s\n",
+ hwif->name);
+ hwif->cbl = ATA_CBL_PATA40_SHORT;
+ }
+}
+
/*
* This is gets invoked once during initialization, to set *everything* up
*/