[PATCH] ide: ide-generic, allow for capture of other unsupported devices

The ide-generic driver gives you DMA at bios tuned speed so can actually run a
lot of unsupported devices quite well.  It has a pci table so that it doesn't
grab disks owned by other drivers but no way to override this.  The patch adds
an option ide-generic-all which makes the driver grab everything going that is
IDE class.

The diff is messy because I put the special case as case 0 to make the if
conditional and long term maintenance easier.

This has been in Fedora for some time.

Signed-off-by: Alan Cox <alan@redhat.com>
Acked-by: Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/ide/pci/generic.c

@@ -39,6 +39,17 @@
 
 #include <asm/io.h>
 
+static int ide_generic_all;		/* Set to claim all devices */
+
+static int __init ide_generic_all_on(char *unused)
+{
+	ide_generic_all = 1;
+	printk(KERN_INFO "IDE generic will claim all unknown PCI IDE storage controllers.\n");
+	return 1;
+}
+
+__setup("all-generic-ide", ide_generic_all_on);
+
 static void __devinit init_hwif_generic (ide_hwif_t *hwif)
 {
 	switch(hwif->pci_dev->device) {
@@ -78,79 +89,85 @@ static void __devinit init_hwif_generic (ide_hwif_t *hwif)
 
 static ide_pci_device_t generic_chipsets[] __devinitdata = {
 	{	/* 0 */
+		.name		= "Unknown",
+		.init_hwif	= init_hwif_generic,
+		.channels	= 2,
+		.autodma	= AUTODMA,
+		.bootable	= ON_BOARD,
+	},{	/* 1 */
 		.name		= "NS87410",
 		.init_hwif	= init_hwif_generic,
 		.channels	= 2,
 		.autodma	= AUTODMA,
 		.enablebits	= {{0x43,0x08,0x08}, {0x47,0x08,0x08}},
 		.bootable	= ON_BOARD,
-        },{	/* 1 */
+        },{	/* 2 */
 		.name		= "SAMURAI",
 		.init_hwif	= init_hwif_generic,
 		.channels	= 2,
 		.autodma	= AUTODMA,
 		.bootable	= ON_BOARD,
-	},{	/* 2 */
+	},{	/* 3 */
 		.name		= "HT6565",
 		.init_hwif	= init_hwif_generic,
 		.channels	= 2,
 		.autodma	= AUTODMA,
 		.bootable	= ON_BOARD,
-	},{	/* 3 */
+	},{	/* 4 */
 		.name		= "UM8673F",
 		.init_hwif	= init_hwif_generic,
 		.channels	= 2,
 		.autodma	= NODMA,
 		.bootable	= ON_BOARD,
-	},{	/* 4 */
+	},{	/* 5 */
 		.name		= "UM8886A",
 		.init_hwif	= init_hwif_generic,
 		.channels	= 2,
 		.autodma	= NODMA,
 		.bootable	= ON_BOARD,
-	},{	/* 5 */
+	},{	/* 6 */
 		.name		= "UM8886BF",
 		.init_hwif	= init_hwif_generic,
 		.channels	= 2,
 		.autodma	= NODMA,
 		.bootable	= ON_BOARD,
-	},{	/* 6 */
+	},{	/* 7 */
 		.name		= "HINT_IDE",
 		.init_hwif	= init_hwif_generic,
 		.channels	= 2,
 		.autodma	= AUTODMA,
 		.bootable	= ON_BOARD,
-	},{	/* 7 */
+	},{	/* 8 */
 		.name		= "VIA_IDE",
 		.init_hwif	= init_hwif_generic,
 		.channels	= 2,
 		.autodma	= NOAUTODMA,
 		.bootable	= ON_BOARD,
-	},{	/* 8 */
+	},{	/* 9 */
 		.name		= "OPTI621V",
 		.init_hwif	= init_hwif_generic,
 		.channels	= 2,
 		.autodma	= NOAUTODMA,
 		.bootable	= ON_BOARD,
-	},{	/* 9 */
+	},{	/* 10 */
 		.name		= "VIA8237SATA",
 		.init_hwif	= init_hwif_generic,
 		.channels	= 2,
 		.autodma	= AUTODMA,
 		.bootable	= OFF_BOARD,
-	},{	/* 10 */
+	},{	/* 11 */
 		.name 		= "Piccolo0102",
 		.init_hwif	= init_hwif_generic,
 		.channels	= 2,
 		.autodma	= NOAUTODMA,
 		.bootable	= ON_BOARD,
-	},{	/* 11 */
+	},{	/* 12 */
 		.name 		= "Piccolo0103",
 		.init_hwif	= init_hwif_generic,
 		.channels	= 2,
 		.autodma	= NOAUTODMA,
 		.bootable	= ON_BOARD,
-	},{	/* 12 */
+	},{	/* 13 */
 		.name 		= "Piccolo0105",
 		.init_hwif	= init_hwif_generic,
 		.channels	= 2,
@@ -174,6 +191,10 @@ static int __devinit generic_init_one(struct pci_dev *dev, const struct pci_devi
 	u16 command;
 	int ret = -ENODEV;
 
+	/* Don't use the generic entry unless instructed to do so */
+	if (id->driver_data == 0 && ide_generic_all == 0)
+			goto out;
+
 	if (dev->vendor == PCI_VENDOR_ID_UMC &&
 	    dev->device == PCI_DEVICE_ID_UMC_UM8886A &&
 	    (!(PCI_FUNC(dev->devfn) & 1)))
@@ -195,21 +216,23 @@ out:
 }
 
 static struct pci_device_id generic_pci_tbl[] = {
-	{ PCI_VENDOR_ID_NS,     PCI_DEVICE_ID_NS_87410,            PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
-	{ PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE,  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
-	{ PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565,         PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
-	{ PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8673F,         PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3},
-	{ PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8886A,         PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
-	{ PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8886BF,        PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5},
-	{ PCI_VENDOR_ID_HINT,   PCI_DEVICE_ID_HINT_VXPROII_IDE,    PCI_ANY_ID, PCI_ANY_ID, 0, 0, 6},
-	{ PCI_VENDOR_ID_VIA,    PCI_DEVICE_ID_VIA_82C561,          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 7},
-	{ PCI_VENDOR_ID_OPTI,   PCI_DEVICE_ID_OPTI_82C558,         PCI_ANY_ID, PCI_ANY_ID, 0, 0, 8},
+	{ PCI_VENDOR_ID_NS,     PCI_DEVICE_ID_NS_87410,            PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
+	{ PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_SAMURAI_IDE,  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
+	{ PCI_VENDOR_ID_HOLTEK, PCI_DEVICE_ID_HOLTEK_6565,         PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3},
+	{ PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8673F,         PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
+	{ PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8886A,         PCI_ANY_ID, PCI_ANY_ID, 0, 0, 5},
+	{ PCI_VENDOR_ID_UMC,    PCI_DEVICE_ID_UMC_UM8886BF,        PCI_ANY_ID, PCI_ANY_ID, 0, 0, 6},
+	{ PCI_VENDOR_ID_HINT,   PCI_DEVICE_ID_HINT_VXPROII_IDE,    PCI_ANY_ID, PCI_ANY_ID, 0, 0, 7},
+	{ PCI_VENDOR_ID_VIA,    PCI_DEVICE_ID_VIA_82C561,          PCI_ANY_ID, PCI_ANY_ID, 0, 0, 8},
+	{ PCI_VENDOR_ID_OPTI,   PCI_DEVICE_ID_OPTI_82C558,         PCI_ANY_ID, PCI_ANY_ID, 0, 0, 9},
 #ifdef CONFIG_BLK_DEV_IDE_SATA
-	{ PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8237_SATA,	   PCI_ANY_ID, PCI_ANY_ID, 0, 0, 9},
+	{ PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_8237_SATA,	   PCI_ANY_ID, PCI_ANY_ID, 0, 0, 10},
 #endif
-	{ PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO,     PCI_ANY_ID, PCI_ANY_ID, 0, 0, 10},
-	{ PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1,   PCI_ANY_ID, PCI_ANY_ID, 0, 0, 11},
-	{ PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2,   PCI_ANY_ID, PCI_ANY_ID, 0, 0, 12},
+	{ PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO,     PCI_ANY_ID, PCI_ANY_ID, 0, 0, 11},
+	{ PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1,   PCI_ANY_ID, PCI_ANY_ID, 0, 0, 12},
+	{ PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2,   PCI_ANY_ID, PCI_ANY_ID, 0, 0, 13},
+	/* Must come last. If you add entries adjust this table appropriately and the init_one code */
+	{ PCI_ANY_ID,		PCI_ANY_ID,			   PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 0},
 	{ 0, },
 };
 MODULE_DEVICE_TABLE(pci, generic_pci_tbl);