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Date: Sat, 16 Feb 2008 17:39:11 +0100
From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To: linux-ide@...r.kernel.org
Cc: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH 03/12] ide: add ide-4drives host driver
CONFIG_BLK_DEV_4DRIVES deserves its own host driver:
* Add drivers/ide/legacy/ide-4drives.c and move "4drives" support there.
* Add ide-4drives.o in the link order after all other legacy host
drivers enabled by "ide0=" options (they all are mutually exclusive).
* Make ide-4drives host driver probe itself for IDE devices instead of
indirectly depending on ide_generic host driver.
* Add "probe" module parameter to ide-4drives and update documentation.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
Documentation/ide.txt | 5 ++--
drivers/ide/Kconfig | 4 +--
drivers/ide/ide.c | 15 ++----------
drivers/ide/legacy/Makefile | 1
drivers/ide/legacy/ide-4drives.c | 46 +++++++++++++++++++++++++++++++++++++++
5 files changed, 55 insertions(+), 16 deletions(-)
Index: b/Documentation/ide.txt
===================================================================
--- a/Documentation/ide.txt
+++ b/Documentation/ide.txt
@@ -242,8 +242,6 @@ Summary of ide driver parameters for ker
both the respective primary and secondary channel
to take effect.
- "idex=four" : four drives on idex and ide(x^1) share same ports
-
"idex=reset" : reset interface after probe
"idex=ata66" : informs the interface that it has an 80c cable
@@ -276,6 +274,9 @@ Also for legacy CMD640 host driver (cmd6
kernel paremeter to enable probing for VLB version of the chipset (PCI ones
are detected automatically).
+You also need to use "probe" kernel paramater for ide-4drives driver
+(support for IDE generic chipset with four drives on one port).
+
================================================================================
IDE ATAPI streaming tape driver
Index: b/drivers/ide/Kconfig
===================================================================
--- a/drivers/ide/Kconfig
+++ b/drivers/ide/Kconfig
@@ -1042,8 +1042,8 @@ config BLK_DEV_4DRIVES
Certain older chipsets, including the Tekram 690CD, use a single set
of I/O ports at 0x1f0 to control up to four drives, instead of the
customary two drives per port. Support for this can be enabled at
- runtime using the "ide0=four" kernel boot parameter if you say Y
- here.
+ runtime using the "ide_4drives.probe" kernel boot parameter if you
+ say Y here.
config BLK_DEV_ALI14XX
tristate "ALI M14xx support"
Index: b/drivers/ide/ide.c
===================================================================
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -989,6 +989,7 @@ extern int probe_dtc2278;
extern int probe_ht6560b;
extern int probe_qd65xx;
extern int cmd640_vlb;
+extern int probe_4drives;
static int __initdata is_chipset_set[MAX_HWIFS];
@@ -1213,19 +1214,9 @@ static int __init ide_setup(char *s)
#endif
#ifdef CONFIG_BLK_DEV_4DRIVES
case -11: /* "four" drives on one set of ports */
- {
- ide_hwif_t *mate = &ide_hwifs[hw^1];
- mate->drives[0].select.all ^= 0x20;
- mate->drives[1].select.all ^= 0x20;
- hwif->chipset = mate->chipset = ide_4drives;
- mate->irq = hwif->irq;
- memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
- hwif->mate = mate;
- mate->mate = hwif;
- hwif->serialized = mate->serialized = 1;
+ probe_4drives = 1;
goto obsolete_option;
- }
-#endif /* CONFIG_BLK_DEV_4DRIVES */
+#endif
case -10: /* minus10 */
case -9: /* minus9 */
case -8: /* minus8 */
Index: b/drivers/ide/legacy/Makefile
===================================================================
--- a/drivers/ide/legacy/Makefile
+++ b/drivers/ide/legacy/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_BLK_DEV_UMC8672) += umc867
obj-$(CONFIG_BLK_DEV_DTC2278) += dtc2278.o
obj-$(CONFIG_BLK_DEV_HT6560B) += ht6560b.o
obj-$(CONFIG_BLK_DEV_QD65XX) += qd65xx.o
+obj-$(CONFIG_BLK_DEV_4DRIVES) += ide-4drives.o
obj-$(CONFIG_BLK_DEV_GAYLE) += gayle.o
obj-$(CONFIG_BLK_DEV_FALCON_IDE) += falconide.o
Index: b/drivers/ide/legacy/ide-4drives.c
===================================================================
--- /dev/null
+++ b/drivers/ide/legacy/ide-4drives.c
@@ -0,0 +1,46 @@
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/ide.h>
+
+int probe_4drives = 0;
+
+module_param_named(probe, probe_4drives, bool, 0);
+MODULE_PARM_DESC(probe, "probe for generic IDE chipset with 4 drives/port");
+
+static int __init ide_4drives_init(void)
+{
+ ide_hwif_t *hwif, *mate;
+ u8 idx[4] = { 0, 1, 0xff, 0xff };
+
+ if (probe_4drives == 0)
+ return -ENODEV;
+
+ hwif = &ide_hwifs[0];
+ mate = &ide_hwifs[1];
+
+ memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
+
+ mate->irq = hwif->irq;
+
+ mate->chipset = hwif->chipset = ide_4drives;
+
+ mate->drives[0].select.all ^= 0x20;
+ mate->drives[1].select.all ^= 0x20;
+
+ hwif->mate = mate;
+ mate->mate = hwif;
+
+ hwif->serialized = mate->serialized = 1;
+
+ ide_device_add(idx, NULL);
+
+ return 0;
+}
+
+module_init(ide_4drives_init);
+
+MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
+MODULE_DESCRIPTION("generic IDE chipset with 4 drives/port support");
+MODULE_LICENSE("GPL");
--
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