projects / GitHub / mt8127 / android_kernel_alcatel_ttab.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> | |
| 19 | #include <linux/delay.h> | |
| 20 | #include <linux/timer.h> | |
| 21 | #include <linux/mm.h> | |
| 22 | #include <linux/ioport.h> | |
| 23 | #include <linux/blkdev.h> | |
| 24 | #include <linux/hdreg.h> | |
| 25 | #include <linux/pci.h> | |
| 26 | #include <linux/ide.h> | |
| 27 | #include <linux/init.h> | |
| 28 | ||
| 29 | #include <asm/io.h> | |
| 30 | ||
| 31 | static void __devinit init_hwif_rz1000 (ide_hwif_t *hwif) | |
| 32 | { | |
| 36501650 | 33 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
| 1da177e4 | 34 | u16 reg; |
| 1da177e4 | 35 | |
| 1da177e4 LT |
36 | if (!pci_read_config_word (dev, 0x40, ®) && |
| 37 | !pci_write_config_word(dev, 0x40, reg & 0xdfff)) { | |
| 38 | printk(KERN_INFO "%s: disabled chipset read-ahead " | |
| 39 | "(buggy RZ1000/RZ1001)\n", hwif->name); | |
| 40 | } else { | |
| 746f312a BZ |
41 | if (hwif->mate) |
| 42 | hwif->mate->serialized = hwif->serialized = 1; | |
| 1da177e4 LT |
43 | hwif->drives[0].no_unmask = 1; |
| 44 | hwif->drives[1].no_unmask = 1; | |
| 45 | printk(KERN_INFO "%s: serialized, disabled unmasking " | |
| 46 | "(buggy RZ1000/RZ1001)\n", hwif->name); | |
| 47 | } | |
| 48 | } | |
| 49 | ||
| 85620436 | 50 | static const struct ide_port_info rz1000_chipset __devinitdata = { |
| 1da177e4 LT |
51 | .name = "RZ100x", |
| 52 | .init_hwif = init_hwif_rz1000, | |
| 528a572d | 53 | .chipset = ide_rz1000, |
| 47b68788 | 54 | .host_flags = IDE_HFLAG_NO_DMA | IDE_HFLAG_BOOTABLE, |
| 1da177e4 LT |
55 | }; |
| 56 | ||
| 57 | static int __devinit rz1000_init_one(struct pci_dev *dev, const struct pci_device_id *id) | |
| 58 | { | |
| 59 | return ide_setup_pci_device(dev, &rz1000_chipset); | |
| 60 | } | |
| 61 | ||
| 9cbcc5e3 BZ |
62 | static const struct pci_device_id rz1000_pci_tbl[] = { |
| 63 | { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), 0 }, | |
| 64 | { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), 0 }, | |
| 1da177e4 LT |
65 | { 0, }, |
| 66 | }; | |
| 67 | MODULE_DEVICE_TABLE(pci, rz1000_pci_tbl); | |
| 68 | ||
| 69 | static struct pci_driver driver = { | |
| 70 | .name = "RZ1000_IDE", | |
| 71 | .id_table = rz1000_pci_tbl, | |
| 72 | .probe = rz1000_init_one, | |
| 73 | }; | |
| 74 | ||
| 82ab1eec | 75 | static int __init rz1000_ide_init(void) |
| 1da177e4 LT |
76 | { |
| 77 | return ide_pci_register_driver(&driver); | |
| 78 | } | |
| 79 | ||
| 80 | module_init(rz1000_ide_init); | |
| 81 | ||
| 82 | MODULE_AUTHOR("Andre Hedrick"); | |
| 83 | MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE"); | |
| 84 | MODULE_LICENSE("GPL"); | |
| 85 |