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 "0.2.2"
28 * rz1000_prereset - probe begin
31 * Set up cable type and use generics
34 static int rz1000_prereset(struct ata_port *ap)
36 ap->cbl = ATA_CBL_PATA40;
37 return ata_std_prereset(ap);
41 * rz1000_error_handler - probe reset
44 * Perform the ATA standard reset sequence
47 static void rz1000_error_handler(struct ata_port *ap)
49 ata_bmdma_drive_eh(ap, rz1000_prereset, ata_std_softreset, NULL, ata_std_postreset);
53 * rz1000_set_mode - mode setting function
56 * Use a non standard set_mode function. We don't want to be tuned. We
57 * would prefer to be BIOS generic but for the fact our hardware is
61 static void rz1000_set_mode(struct ata_port *ap)
65 for (i = 0; i < ATA_MAX_DEVICES; i++) {
66 struct ata_device *dev = &ap->device[i];
67 if (ata_dev_enabled(dev)) {
68 /* We don't really care */
69 dev->pio_mode = XFER_PIO_0;
70 dev->xfer_mode = XFER_PIO_0;
71 dev->xfer_shift = ATA_SHIFT_PIO;
72 dev->flags |= ATA_DFLAG_PIO;
78 static struct scsi_host_template rz1000_sht = {
79 .module = THIS_MODULE,
81 .ioctl = ata_scsi_ioctl,
82 .queuecommand = ata_scsi_queuecmd,
83 .can_queue = ATA_DEF_QUEUE,
84 .this_id = ATA_SHT_THIS_ID,
85 .sg_tablesize = LIBATA_MAX_PRD,
86 .max_sectors = ATA_MAX_SECTORS,
87 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
88 .emulated = ATA_SHT_EMULATED,
89 .use_clustering = ATA_SHT_USE_CLUSTERING,
90 .proc_name = DRV_NAME,
91 .dma_boundary = ATA_DMA_BOUNDARY,
92 .slave_configure = ata_scsi_slave_config,
93 .slave_destroy = ata_scsi_slave_destroy,
94 .bios_param = ata_std_bios_param,
97 static struct ata_port_operations rz1000_port_ops = {
98 .set_mode = rz1000_set_mode,
100 .port_disable = ata_port_disable,
101 .tf_load = ata_tf_load,
102 .tf_read = ata_tf_read,
103 .check_status = ata_check_status,
104 .exec_command = ata_exec_command,
105 .dev_select = ata_std_dev_select,
107 .error_handler = rz1000_error_handler,
109 .bmdma_setup = ata_bmdma_setup,
110 .bmdma_start = ata_bmdma_start,
111 .bmdma_stop = ata_bmdma_stop,
112 .bmdma_status = ata_bmdma_status,
114 .qc_prep = ata_qc_prep,
115 .qc_issue = ata_qc_issue_prot,
117 .data_xfer = ata_pio_data_xfer,
119 .freeze = ata_bmdma_freeze,
120 .thaw = ata_bmdma_thaw,
121 .error_handler = rz1000_error_handler,
122 .post_internal_cmd = ata_bmdma_post_internal_cmd,
124 .irq_handler = ata_interrupt,
125 .irq_clear = ata_bmdma_irq_clear,
127 .port_start = ata_port_start,
128 .port_stop = ata_port_stop,
129 .host_stop = ata_host_stop
133 * rz1000_init_one - Register RZ1000 ATA PCI device with kernel services
134 * @pdev: PCI device to register
135 * @ent: Entry in rz1000_pci_tbl matching with @pdev
137 * Configure an RZ1000 interface. This doesn't require much special
138 * handling except that we *MUST* kill the chipset readahead or the
139 * user may experience data corruption.
142 static int rz1000_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
144 static int printed_version;
145 struct ata_port_info *port_info[2];
147 static struct ata_port_info info = {
149 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
151 .port_ops = &rz1000_port_ops
154 if (!printed_version++)
155 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
157 /* Be exceptionally paranoid as we must be sure to apply the fix */
158 if (pci_read_config_word(pdev, 0x40, ®) != 0)
161 if (pci_write_config_word(pdev, 0x40, reg) != 0)
163 printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n");
165 port_info[0] = &info;
166 port_info[1] = &info;
167 return ata_pci_init_one(pdev, port_info, 2);
169 printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n");
170 /* Not safe to use so skip */
174 static const struct pci_device_id pata_rz1000[] = {
175 { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), },
176 { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), },
181 static struct pci_driver rz1000_pci_driver = {
183 .id_table = pata_rz1000,
184 .probe = rz1000_init_one,
185 .remove = ata_pci_remove_one
188 static int __init rz1000_init(void)
190 return pci_register_driver(&rz1000_pci_driver);
193 static void __exit rz1000_exit(void)
195 pci_unregister_driver(&rz1000_pci_driver);
198 MODULE_AUTHOR("Alan Cox");
199 MODULE_DESCRIPTION("low-level driver for RZ1000 PCI ATA");
200 MODULE_LICENSE("GPL");
201 MODULE_DEVICE_TABLE(pci, pata_rz1000);
202 MODULE_VERSION(DRV_VERSION);
204 module_init(rz1000_init);
205 module_exit(rz1000_exit);