2 * RZ1000/1001 driver based upon
4 * linux/drivers/ide/pci/rz1000.c Version 0.06 January 12, 2003
5 * Copyright (C) 1995-1998 Linus Torvalds & author (see below)
6 * Principal Author: mlord@pobox.com (Mark Lord)
8 * See linux/MAINTAINERS for address of current maintainer.
10 * This file provides support for disabling the buggy read-ahead
11 * mode of the RZ1000 IDE chipset, commonly used on Intel motherboards.
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/pci.h>
17 #include <linux/init.h>
18 #include <linux/blkdev.h>
19 #include <linux/delay.h>
20 #include <scsi/scsi_host.h>
21 #include <linux/libata.h>
23 #define DRV_NAME "pata_rz1000"
24 #define DRV_VERSION "0.2.4"
28 * rz1000_set_mode - mode setting function
30 * @unused: returned device on set_mode failure
32 * Use a non standard set_mode function. We don't want to be tuned. We
33 * would prefer to be BIOS generic but for the fact our hardware is
37 static int rz1000_set_mode(struct ata_link *link, struct ata_device **unused)
39 struct ata_device *dev;
41 ata_link_for_each_dev(dev, link) {
42 if (ata_dev_enabled(dev)) {
43 /* We don't really care */
44 dev->pio_mode = XFER_PIO_0;
45 dev->xfer_mode = XFER_PIO_0;
46 dev->xfer_shift = ATA_SHIFT_PIO;
47 dev->flags |= ATA_DFLAG_PIO;
48 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
55 static struct scsi_host_template rz1000_sht = {
56 ATA_PIO_SHT(DRV_NAME),
59 static struct ata_port_operations rz1000_port_ops = {
60 .inherits = &ata_sff_port_ops,
61 .cable_detect = ata_cable_40wire,
62 .set_mode = rz1000_set_mode,
65 static int rz1000_fifo_disable(struct pci_dev *pdev)
68 /* Be exceptionally paranoid as we must be sure to apply the fix */
69 if (pci_read_config_word(pdev, 0x40, ®) != 0)
72 if (pci_write_config_word(pdev, 0x40, reg) != 0)
74 printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n");
79 * rz1000_init_one - Register RZ1000 ATA PCI device with kernel services
80 * @pdev: PCI device to register
81 * @ent: Entry in rz1000_pci_tbl matching with @pdev
83 * Configure an RZ1000 interface. This doesn't require much special
84 * handling except that we *MUST* kill the chipset readahead or the
85 * user may experience data corruption.
88 static int rz1000_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
90 static int printed_version;
91 static const struct ata_port_info info = {
92 .flags = ATA_FLAG_SLAVE_POSS,
94 .port_ops = &rz1000_port_ops
96 const struct ata_port_info *ppi[] = { &info, NULL };
98 if (!printed_version++)
99 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
101 if (rz1000_fifo_disable(pdev) == 0)
102 return ata_pci_sff_init_one(pdev, ppi, &rz1000_sht, NULL);
104 printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n");
105 /* Not safe to use so skip */
110 static int rz1000_reinit_one(struct pci_dev *pdev)
112 /* If this fails on resume (which is a "cant happen" case), we
113 must stop as any progress risks data loss */
114 if (rz1000_fifo_disable(pdev))
115 panic("rz1000 fifo");
116 return ata_pci_device_resume(pdev);
120 static const struct pci_device_id pata_rz1000[] = {
121 { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), },
122 { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), },
127 static struct pci_driver rz1000_pci_driver = {
129 .id_table = pata_rz1000,
130 .probe = rz1000_init_one,
131 .remove = ata_pci_remove_one,
133 .suspend = ata_pci_device_suspend,
134 .resume = rz1000_reinit_one,
138 static int __init rz1000_init(void)
140 return pci_register_driver(&rz1000_pci_driver);
143 static void __exit rz1000_exit(void)
145 pci_unregister_driver(&rz1000_pci_driver);
148 MODULE_AUTHOR("Alan Cox");
149 MODULE_DESCRIPTION("low-level driver for RZ1000 PCI ATA");
150 MODULE_LICENSE("GPL");
151 MODULE_DEVICE_TABLE(pci, pata_rz1000);
152 MODULE_VERSION(DRV_VERSION);
154 module_init(rz1000_init);
155 module_exit(rz1000_exit);