blob: 46d6bc1bf1e92afc990479c37525f4e91f197904 [file] [log] [blame]
Jeff Garzik669a5db2006-08-29 18:12:40 -04001/*
2 * RZ1000/1001 driver based upon
3 *
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)
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
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>
22
23#define DRV_NAME "pata_rz1000"
Jeff Garzik8bc3fc42007-05-21 20:26:38 -040024#define DRV_VERSION "0.2.4"
Jeff Garzik669a5db2006-08-29 18:12:40 -040025
26
27/**
Jeff Garzik669a5db2006-08-29 18:12:40 -040028 * rz1000_set_mode - mode setting function
Tejun Heo02607312007-08-06 18:36:23 +090029 * @link: ATA link
Alanb229a7b2007-01-24 11:47:07 +000030 * @unused: returned device on set_mode failure
Jeff Garzik669a5db2006-08-29 18:12:40 -040031 *
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
34 * whacked out.
35 */
36
Tejun Heo02607312007-08-06 18:36:23 +090037static int rz1000_set_mode(struct ata_link *link, struct ata_device **unused)
Jeff Garzik669a5db2006-08-29 18:12:40 -040038{
Tejun Heof58229f2007-08-06 18:36:23 +090039 struct ata_device *dev;
Jeff Garzik669a5db2006-08-29 18:12:40 -040040
Tejun Heo1eca4362008-11-03 20:03:17 +090041 ata_for_each_dev(dev, link, ENABLED) {
42 /* We don't really care */
43 dev->pio_mode = XFER_PIO_0;
44 dev->xfer_mode = XFER_PIO_0;
45 dev->xfer_shift = ATA_SHIFT_PIO;
46 dev->flags |= ATA_DFLAG_PIO;
47 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
Jeff Garzik669a5db2006-08-29 18:12:40 -040048 }
Alanb229a7b2007-01-24 11:47:07 +000049 return 0;
Jeff Garzik669a5db2006-08-29 18:12:40 -040050}
51
52
53static struct scsi_host_template rz1000_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +090054 ATA_PIO_SHT(DRV_NAME),
Jeff Garzik669a5db2006-08-29 18:12:40 -040055};
56
57static struct ata_port_operations rz1000_port_ops = {
Tejun Heo029cfd62008-03-25 12:22:49 +090058 .inherits = &ata_sff_port_ops,
Alan Cox2a25dfe2007-03-08 22:57:03 +000059 .cable_detect = ata_cable_40wire,
Tejun Heo029cfd62008-03-25 12:22:49 +090060 .set_mode = rz1000_set_mode,
Jeff Garzik669a5db2006-08-29 18:12:40 -040061};
62
Alanad4a42d2006-11-22 17:23:37 +000063static int rz1000_fifo_disable(struct pci_dev *pdev)
64{
65 u16 reg;
66 /* Be exceptionally paranoid as we must be sure to apply the fix */
67 if (pci_read_config_word(pdev, 0x40, &reg) != 0)
68 return -1;
69 reg &= 0xDFFF;
70 if (pci_write_config_word(pdev, 0x40, reg) != 0)
71 return -1;
72 printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n");
73 return 0;
74}
75
Jeff Garzik669a5db2006-08-29 18:12:40 -040076/**
77 * rz1000_init_one - Register RZ1000 ATA PCI device with kernel services
78 * @pdev: PCI device to register
79 * @ent: Entry in rz1000_pci_tbl matching with @pdev
80 *
81 * Configure an RZ1000 interface. This doesn't require much special
82 * handling except that we *MUST* kill the chipset readahead or the
83 * user may experience data corruption.
84 */
85
86static int rz1000_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
87{
88 static int printed_version;
Tejun Heo1626aeb2007-05-04 12:43:58 +020089 static const struct ata_port_info info = {
Jeff Garzik1d2808f2007-05-28 06:59:48 -040090 .flags = ATA_FLAG_SLAVE_POSS,
Jeff Garzik669a5db2006-08-29 18:12:40 -040091 .pio_mask = 0x1f,
92 .port_ops = &rz1000_port_ops
93 };
Tejun Heo1626aeb2007-05-04 12:43:58 +020094 const struct ata_port_info *ppi[] = { &info, NULL };
Jeff Garzik669a5db2006-08-29 18:12:40 -040095
96 if (!printed_version++)
97 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
98
Tejun Heo1626aeb2007-05-04 12:43:58 +020099 if (rz1000_fifo_disable(pdev) == 0)
Tejun Heo9363c382008-04-07 22:47:16 +0900100 return ata_pci_sff_init_one(pdev, ppi, &rz1000_sht, NULL);
Tejun Heo1626aeb2007-05-04 12:43:58 +0200101
Jeff Garzik669a5db2006-08-29 18:12:40 -0400102 printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n");
103 /* Not safe to use so skip */
104 return -ENODEV;
105}
106
Tejun Heo438ac6d2007-03-02 17:31:26 +0900107#ifdef CONFIG_PM
Alanad4a42d2006-11-22 17:23:37 +0000108static int rz1000_reinit_one(struct pci_dev *pdev)
109{
110 /* If this fails on resume (which is a "cant happen" case), we
111 must stop as any progress risks data loss */
112 if (rz1000_fifo_disable(pdev))
113 panic("rz1000 fifo");
114 return ata_pci_device_resume(pdev);
115}
Tejun Heo438ac6d2007-03-02 17:31:26 +0900116#endif
Alanad4a42d2006-11-22 17:23:37 +0000117
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400118static const struct pci_device_id pata_rz1000[] = {
119 { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), },
120 { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), },
121
122 { },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400123};
124
125static struct pci_driver rz1000_pci_driver = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400126 .name = DRV_NAME,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400127 .id_table = pata_rz1000,
128 .probe = rz1000_init_one,
Alanad4a42d2006-11-22 17:23:37 +0000129 .remove = ata_pci_remove_one,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900130#ifdef CONFIG_PM
Alanad4a42d2006-11-22 17:23:37 +0000131 .suspend = ata_pci_device_suspend,
132 .resume = rz1000_reinit_one,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900133#endif
Jeff Garzik669a5db2006-08-29 18:12:40 -0400134};
135
Jeff Garzik669a5db2006-08-29 18:12:40 -0400136static int __init rz1000_init(void)
137{
138 return pci_register_driver(&rz1000_pci_driver);
139}
140
141static void __exit rz1000_exit(void)
142{
143 pci_unregister_driver(&rz1000_pci_driver);
144}
145
146MODULE_AUTHOR("Alan Cox");
147MODULE_DESCRIPTION("low-level driver for RZ1000 PCI ATA");
148MODULE_LICENSE("GPL");
149MODULE_DEVICE_TABLE(pci, pata_rz1000);
150MODULE_VERSION(DRV_VERSION);
151
152module_init(rz1000_init);
153module_exit(rz1000_exit);
154