blob: 7632fcb070ca8b1a85562fb0aee9ed2e1bdbfc35 [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
29 * @ap: ATA interface
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
Alanb229a7b2007-01-24 11:47:07 +000037static int rz1000_set_mode(struct ata_port *ap, struct ata_device **unused)
Jeff Garzik669a5db2006-08-29 18:12:40 -040038{
39 int i;
40
41 for (i = 0; i < ATA_MAX_DEVICES; i++) {
42 struct ata_device *dev = &ap->device[i];
Tejun Heo9666f402007-05-04 21:27:47 +020043 if (ata_dev_enabled(dev)) {
Jeff Garzik669a5db2006-08-29 18:12:40 -040044 /* We don't really care */
45 dev->pio_mode = XFER_PIO_0;
46 dev->xfer_mode = XFER_PIO_0;
47 dev->xfer_shift = ATA_SHIFT_PIO;
48 dev->flags |= ATA_DFLAG_PIO;
Alane852f702007-02-20 17:35:43 +000049 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
Jeff Garzik669a5db2006-08-29 18:12:40 -040050 }
51 }
Alanb229a7b2007-01-24 11:47:07 +000052 return 0;
Jeff Garzik669a5db2006-08-29 18:12:40 -040053}
54
55
56static struct scsi_host_template rz1000_sht = {
57 .module = THIS_MODULE,
58 .name = DRV_NAME,
59 .ioctl = ata_scsi_ioctl,
60 .queuecommand = ata_scsi_queuecmd,
61 .can_queue = ATA_DEF_QUEUE,
62 .this_id = ATA_SHT_THIS_ID,
63 .sg_tablesize = LIBATA_MAX_PRD,
Jeff Garzik669a5db2006-08-29 18:12:40 -040064 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
65 .emulated = ATA_SHT_EMULATED,
66 .use_clustering = ATA_SHT_USE_CLUSTERING,
67 .proc_name = DRV_NAME,
68 .dma_boundary = ATA_DMA_BOUNDARY,
69 .slave_configure = ata_scsi_slave_config,
Tejun Heoafdfe892006-11-29 11:26:47 +090070 .slave_destroy = ata_scsi_slave_destroy,
Jeff Garzik669a5db2006-08-29 18:12:40 -040071 .bios_param = ata_std_bios_param,
72};
73
74static struct ata_port_operations rz1000_port_ops = {
75 .set_mode = rz1000_set_mode,
76
77 .port_disable = ata_port_disable,
78 .tf_load = ata_tf_load,
79 .tf_read = ata_tf_read,
80 .check_status = ata_check_status,
81 .exec_command = ata_exec_command,
82 .dev_select = ata_std_dev_select,
83
Jeff Garzik669a5db2006-08-29 18:12:40 -040084 .bmdma_setup = ata_bmdma_setup,
85 .bmdma_start = ata_bmdma_start,
86 .bmdma_stop = ata_bmdma_stop,
87 .bmdma_status = ata_bmdma_status,
88
89 .qc_prep = ata_qc_prep,
90 .qc_issue = ata_qc_issue_prot,
Jeff Garzikbda30282006-09-27 05:41:13 -040091
Tejun Heo0d5ff562007-02-01 15:06:36 +090092 .data_xfer = ata_data_xfer,
Jeff Garzik669a5db2006-08-29 18:12:40 -040093
94 .freeze = ata_bmdma_freeze,
95 .thaw = ata_bmdma_thaw,
Alan Cox2a25dfe2007-03-08 22:57:03 +000096 .error_handler = ata_bmdma_error_handler,
Jeff Garzik669a5db2006-08-29 18:12:40 -040097 .post_internal_cmd = ata_bmdma_post_internal_cmd,
Alan Cox2a25dfe2007-03-08 22:57:03 +000098 .cable_detect = ata_cable_40wire,
Jeff Garzik669a5db2006-08-29 18:12:40 -040099
100 .irq_handler = ata_interrupt,
101 .irq_clear = ata_bmdma_irq_clear,
Akira Iguchi246ce3b2007-01-26 16:27:58 +0900102 .irq_on = ata_irq_on,
103 .irq_ack = ata_irq_ack,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400104
105 .port_start = ata_port_start,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400106};
107
Alanad4a42d2006-11-22 17:23:37 +0000108static int rz1000_fifo_disable(struct pci_dev *pdev)
109{
110 u16 reg;
111 /* Be exceptionally paranoid as we must be sure to apply the fix */
112 if (pci_read_config_word(pdev, 0x40, &reg) != 0)
113 return -1;
114 reg &= 0xDFFF;
115 if (pci_write_config_word(pdev, 0x40, reg) != 0)
116 return -1;
117 printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n");
118 return 0;
119}
120
Jeff Garzik669a5db2006-08-29 18:12:40 -0400121/**
122 * rz1000_init_one - Register RZ1000 ATA PCI device with kernel services
123 * @pdev: PCI device to register
124 * @ent: Entry in rz1000_pci_tbl matching with @pdev
125 *
126 * Configure an RZ1000 interface. This doesn't require much special
127 * handling except that we *MUST* kill the chipset readahead or the
128 * user may experience data corruption.
129 */
130
131static int rz1000_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
132{
133 static int printed_version;
Tejun Heo1626aeb2007-05-04 12:43:58 +0200134 static const struct ata_port_info info = {
Jeff Garzik669a5db2006-08-29 18:12:40 -0400135 .sht = &rz1000_sht,
Jeff Garzik1d2808f2007-05-28 06:59:48 -0400136 .flags = ATA_FLAG_SLAVE_POSS,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400137 .pio_mask = 0x1f,
138 .port_ops = &rz1000_port_ops
139 };
Tejun Heo1626aeb2007-05-04 12:43:58 +0200140 const struct ata_port_info *ppi[] = { &info, NULL };
Jeff Garzik669a5db2006-08-29 18:12:40 -0400141
142 if (!printed_version++)
143 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
144
Tejun Heo1626aeb2007-05-04 12:43:58 +0200145 if (rz1000_fifo_disable(pdev) == 0)
146 return ata_pci_init_one(pdev, ppi);
147
Jeff Garzik669a5db2006-08-29 18:12:40 -0400148 printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n");
149 /* Not safe to use so skip */
150 return -ENODEV;
151}
152
Tejun Heo438ac6d2007-03-02 17:31:26 +0900153#ifdef CONFIG_PM
Alanad4a42d2006-11-22 17:23:37 +0000154static int rz1000_reinit_one(struct pci_dev *pdev)
155{
156 /* If this fails on resume (which is a "cant happen" case), we
157 must stop as any progress risks data loss */
158 if (rz1000_fifo_disable(pdev))
159 panic("rz1000 fifo");
160 return ata_pci_device_resume(pdev);
161}
Tejun Heo438ac6d2007-03-02 17:31:26 +0900162#endif
Alanad4a42d2006-11-22 17:23:37 +0000163
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400164static const struct pci_device_id pata_rz1000[] = {
165 { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), },
166 { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), },
167
168 { },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400169};
170
171static struct pci_driver rz1000_pci_driver = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400172 .name = DRV_NAME,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400173 .id_table = pata_rz1000,
174 .probe = rz1000_init_one,
Alanad4a42d2006-11-22 17:23:37 +0000175 .remove = ata_pci_remove_one,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900176#ifdef CONFIG_PM
Alanad4a42d2006-11-22 17:23:37 +0000177 .suspend = ata_pci_device_suspend,
178 .resume = rz1000_reinit_one,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900179#endif
Jeff Garzik669a5db2006-08-29 18:12:40 -0400180};
181
Jeff Garzik669a5db2006-08-29 18:12:40 -0400182static int __init rz1000_init(void)
183{
184 return pci_register_driver(&rz1000_pci_driver);
185}
186
187static void __exit rz1000_exit(void)
188{
189 pci_unregister_driver(&rz1000_pci_driver);
190}
191
192MODULE_AUTHOR("Alan Cox");
193MODULE_DESCRIPTION("low-level driver for RZ1000 PCI ATA");
194MODULE_LICENSE("GPL");
195MODULE_DEVICE_TABLE(pci, pata_rz1000);
196MODULE_VERSION(DRV_VERSION);
197
198module_init(rz1000_init);
199module_exit(rz1000_exit);
200