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 .module = THIS_MODULE,
58 .ioctl = ata_scsi_ioctl,
59 .queuecommand = ata_scsi_queuecmd,
60 .can_queue = ATA_DEF_QUEUE,
61 .this_id = ATA_SHT_THIS_ID,
62 .sg_tablesize = LIBATA_MAX_PRD,
63 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
64 .emulated = ATA_SHT_EMULATED,
65 .use_clustering = ATA_SHT_USE_CLUSTERING,
66 .proc_name = DRV_NAME,
67 .dma_boundary = ATA_DMA_BOUNDARY,
68 .slave_configure = ata_scsi_slave_config,
69 .slave_destroy = ata_scsi_slave_destroy,
70 .bios_param = ata_std_bios_param,
73 static struct ata_port_operations rz1000_port_ops = {
74 .set_mode = rz1000_set_mode,
76 .tf_load = ata_tf_load,
77 .tf_read = ata_tf_read,
78 .check_status = ata_check_status,
79 .exec_command = ata_exec_command,
80 .dev_select = ata_std_dev_select,
82 .bmdma_setup = ata_bmdma_setup,
83 .bmdma_start = ata_bmdma_start,
84 .bmdma_stop = ata_bmdma_stop,
85 .bmdma_status = ata_bmdma_status,
87 .qc_prep = ata_qc_prep,
88 .qc_issue = ata_qc_issue_prot,
90 .data_xfer = ata_data_xfer,
92 .freeze = ata_bmdma_freeze,
93 .thaw = ata_bmdma_thaw,
94 .error_handler = ata_bmdma_error_handler,
95 .post_internal_cmd = ata_bmdma_post_internal_cmd,
96 .cable_detect = ata_cable_40wire,
98 .irq_handler = ata_interrupt,
99 .irq_clear = ata_bmdma_irq_clear,
100 .irq_on = ata_irq_on,
102 .port_start = ata_sff_port_start,
105 static int rz1000_fifo_disable(struct pci_dev *pdev)
108 /* Be exceptionally paranoid as we must be sure to apply the fix */
109 if (pci_read_config_word(pdev, 0x40, ®) != 0)
112 if (pci_write_config_word(pdev, 0x40, reg) != 0)
114 printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n");
119 * rz1000_init_one - Register RZ1000 ATA PCI device with kernel services
120 * @pdev: PCI device to register
121 * @ent: Entry in rz1000_pci_tbl matching with @pdev
123 * Configure an RZ1000 interface. This doesn't require much special
124 * handling except that we *MUST* kill the chipset readahead or the
125 * user may experience data corruption.
128 static int rz1000_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
130 static int printed_version;
131 static const struct ata_port_info info = {
133 .flags = ATA_FLAG_SLAVE_POSS,
135 .port_ops = &rz1000_port_ops
137 const struct ata_port_info *ppi[] = { &info, NULL };
139 if (!printed_version++)
140 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
142 if (rz1000_fifo_disable(pdev) == 0)
143 return ata_pci_init_one(pdev, ppi);
145 printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n");
146 /* Not safe to use so skip */
151 static int rz1000_reinit_one(struct pci_dev *pdev)
153 /* If this fails on resume (which is a "cant happen" case), we
154 must stop as any progress risks data loss */
155 if (rz1000_fifo_disable(pdev))
156 panic("rz1000 fifo");
157 return ata_pci_device_resume(pdev);
161 static const struct pci_device_id pata_rz1000[] = {
162 { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), },
163 { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), },
168 static struct pci_driver rz1000_pci_driver = {
170 .id_table = pata_rz1000,
171 .probe = rz1000_init_one,
172 .remove = ata_pci_remove_one,
174 .suspend = ata_pci_device_suspend,
175 .resume = rz1000_reinit_one,
179 static int __init rz1000_init(void)
181 return pci_register_driver(&rz1000_pci_driver);
184 static void __exit rz1000_exit(void)
186 pci_unregister_driver(&rz1000_pci_driver);
189 MODULE_AUTHOR("Alan Cox");
190 MODULE_DESCRIPTION("low-level driver for RZ1000 PCI ATA");
191 MODULE_LICENSE("GPL");
192 MODULE_DEVICE_TABLE(pci, pata_rz1000);
193 MODULE_VERSION(DRV_VERSION);
195 module_init(rz1000_init);
196 module_exit(rz1000_exit);