projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 | 1 | /* |
| 1da177e4 LT |
2 | * Copyright (C) 1995-1998 Linus Torvalds & author (see below) |
| 3 | */ | |
| 4 | ||
| 5 | /* | |
| 6 | * Principal Author: mlord@pobox.com (Mark Lord) | |
| 7 | * | |
| 8 | * See linux/MAINTAINERS for address of current maintainer. | |
| 9 | * | |
| 10 | * This file provides support for disabling the buggy read-ahead | |
| 11 | * mode of the RZ1000 IDE chipset, commonly used on Intel motherboards. | |
| 12 | * | |
| 13 | * Dunno if this fixes both ports, or only the primary port (?). | |
| 14 | */ | |
| 15 | ||
| 1da177e4 LT |
16 | #include <linux/types.h> |
| 17 | #include <linux/module.h> | |
| 18 | #include <linux/kernel.h> | |
| 1da177e4 LT |
19 | #include <linux/hdreg.h> |
| 20 | #include <linux/pci.h> | |
| 21 | #include <linux/ide.h> | |
| 22 | #include <linux/init.h> | |
| 23 | ||
| 1da177e4 LT |
24 | static void __devinit init_hwif_rz1000 (ide_hwif_t *hwif) |
| 25 | { | |
| 36501650 | 26 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
| 1da177e4 | 27 | u16 reg; |
| 1da177e4 | 28 | |
| 1da177e4 LT |
29 | if (!pci_read_config_word (dev, 0x40, ®) && |
| 30 | !pci_write_config_word(dev, 0x40, reg & 0xdfff)) { | |
| 31 | printk(KERN_INFO "%s: disabled chipset read-ahead " | |
| 32 | "(buggy RZ1000/RZ1001)\n", hwif->name); | |
| 33 | } else { | |
| 746f312a BZ |
34 | if (hwif->mate) |
| 35 | hwif->mate->serialized = hwif->serialized = 1; | |
| 807b90d0 | 36 | hwif->host_flags |= IDE_HFLAG_NO_UNMASK_IRQS; |
| 1da177e4 LT |
37 | printk(KERN_INFO "%s: serialized, disabled unmasking " |
| 38 | "(buggy RZ1000/RZ1001)\n", hwif->name); | |
| 39 | } | |
| 40 | } | |
| 41 | ||
| 85620436 | 42 | static const struct ide_port_info rz1000_chipset __devinitdata = { |
| 1da177e4 LT |
43 | .name = "RZ100x", |
| 44 | .init_hwif = init_hwif_rz1000, | |
| 528a572d | 45 | .chipset = ide_rz1000, |
| 47b68788 | 46 | .host_flags = IDE_HFLAG_NO_DMA | IDE_HFLAG_BOOTABLE, |
| 1da177e4 LT |
47 | }; |
| 48 | ||
| 49 | static int __devinit rz1000_init_one(struct pci_dev *dev, const struct pci_device_id *id) | |
| 50 | { | |
| 51 | return ide_setup_pci_device(dev, &rz1000_chipset); | |
| 52 | } | |
| 53 | ||
| 9cbcc5e3 BZ |
54 | static const struct pci_device_id rz1000_pci_tbl[] = { |
| 55 | { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), 0 }, | |
| 56 | { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), 0 }, | |
| 1da177e4 LT |
57 | { 0, }, |
| 58 | }; | |
| 59 | MODULE_DEVICE_TABLE(pci, rz1000_pci_tbl); | |
| 60 | ||
| 61 | static struct pci_driver driver = { | |
| 62 | .name = "RZ1000_IDE", | |
| 63 | .id_table = rz1000_pci_tbl, | |
| 64 | .probe = rz1000_init_one, | |
| 65 | }; | |
| 66 | ||
| 82ab1eec | 67 | static int __init rz1000_ide_init(void) |
| 1da177e4 LT |
68 | { |
| 69 | return ide_pci_register_driver(&driver); | |
| 70 | } | |
| 71 | ||
| 72 | module_init(rz1000_ide_init); | |
| 73 | ||
| 74 | MODULE_AUTHOR("Andre Hedrick"); | |
| 75 | MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE"); | |
| 76 | MODULE_LICENSE("GPL"); | |
| 77 |