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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-04-18 00:46:34 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-04-18 00:46:34 +0200
commitffd4f6f0eed0423652826f3775077d11918b4180 (patch)
treef574449a3fa0da029d42b401336adefa42bca06b /drivers/ide/legacy
parent26d799b729003220c0f3e5d9e046e1588c011897 (diff)
ide: add ide-4drives host driver (take 3)
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. v2: * s/paramater/parameter/ in ide.txt. (Noticed by Randy Dunlap) v3: * s/ide_4drives.probe/ide-4drives.probe/ in help entry. (Noticed by Sergei Shtylyov) Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/legacy')
-rw-r--r--drivers/ide/legacy/Makefile1
-rw-r--r--drivers/ide/legacy/ide-4drives.c46
2 files changed, 47 insertions, 0 deletions
diff --git a/drivers/ide/legacy/Makefile b/drivers/ide/legacy/Makefile
index 7043ec7d1e0..6939329f89e 100644
--- a/drivers/ide/legacy/Makefile
+++ b/drivers/ide/legacy/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_BLK_DEV_UMC8672) += umc8672.o
obj-$(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
diff --git a/drivers/ide/legacy/ide-4drives.c b/drivers/ide/legacy/ide-4drives.c
new file mode 100644
index 00000000000..5aa7e93cfd3
--- /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");