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 "0.2.3"
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
55 * @unused: returned device on set_mode failure
57 * Use a non standard set_mode function. We don't want to be tuned. We
58 * would prefer to be BIOS generic but for the fact our hardware is
62 static int rz1000_set_mode(struct ata_port *ap, struct ata_device **unused)
66 for (i = 0; i < ATA_MAX_DEVICES; i++) {
67 struct ata_device *dev = &ap->device[i];
68 if (ata_dev_ready(dev)) {
69 /* We don't really care */
70 dev->pio_mode = XFER_PIO_0;
71 dev->xfer_mode = XFER_PIO_0;
72 dev->xfer_shift = ATA_SHIFT_PIO;
73 dev->flags |= ATA_DFLAG_PIO;
74 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
81 static struct scsi_host_template rz1000_sht = {
82 .module = THIS_MODULE,
84 .ioctl = ata_scsi_ioctl,
85 .queuecommand = ata_scsi_queuecmd,
86 .can_queue = ATA_DEF_QUEUE,
87 .this_id = ATA_SHT_THIS_ID,
88 .sg_tablesize = LIBATA_MAX_PRD,
89 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
90 .emulated = ATA_SHT_EMULATED,
91 .use_clustering = ATA_SHT_USE_CLUSTERING,
92 .proc_name = DRV_NAME,
93 .dma_boundary = ATA_DMA_BOUNDARY,
94 .slave_configure = ata_scsi_slave_config,
95 .slave_destroy = ata_scsi_slave_destroy,
96 .bios_param = ata_std_bios_param,
98 .resume = ata_scsi_device_resume,
99 .suspend = ata_scsi_device_suspend,
103 static struct ata_port_operations rz1000_port_ops = {
104 .set_mode = rz1000_set_mode,
106 .port_disable = ata_port_disable,
107 .tf_load = ata_tf_load,
108 .tf_read = ata_tf_read,
109 .check_status = ata_check_status,
110 .exec_command = ata_exec_command,
111 .dev_select = ata_std_dev_select,
113 .bmdma_setup = ata_bmdma_setup,
114 .bmdma_start = ata_bmdma_start,
115 .bmdma_stop = ata_bmdma_stop,
116 .bmdma_status = ata_bmdma_status,
118 .qc_prep = ata_qc_prep,
119 .qc_issue = ata_qc_issue_prot,
121 .data_xfer = ata_data_xfer,
123 .freeze = ata_bmdma_freeze,
124 .thaw = ata_bmdma_thaw,
125 .error_handler = rz1000_error_handler,
126 .post_internal_cmd = ata_bmdma_post_internal_cmd,
128 .irq_handler = ata_interrupt,
129 .irq_clear = ata_bmdma_irq_clear,
130 .irq_on = ata_irq_on,
131 .irq_ack = ata_irq_ack,
133 .port_start = ata_port_start,
136 static int rz1000_fifo_disable(struct pci_dev *pdev)
139 /* Be exceptionally paranoid as we must be sure to apply the fix */
140 if (pci_read_config_word(pdev, 0x40, ®) != 0)
143 if (pci_write_config_word(pdev, 0x40, reg) != 0)
145 printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n");
150 * rz1000_init_one - Register RZ1000 ATA PCI device with kernel services
151 * @pdev: PCI device to register
152 * @ent: Entry in rz1000_pci_tbl matching with @pdev
154 * Configure an RZ1000 interface. This doesn't require much special
155 * handling except that we *MUST* kill the chipset readahead or the
156 * user may experience data corruption.
159 static int rz1000_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
161 static int printed_version;
162 struct ata_port_info *port_info[2];
163 static struct ata_port_info info = {
165 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
167 .port_ops = &rz1000_port_ops
170 if (!printed_version++)
171 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
173 if (rz1000_fifo_disable(pdev) == 0) {
174 port_info[0] = &info;
175 port_info[1] = &info;
176 return ata_pci_init_one(pdev, port_info, 2);
178 printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n");
179 /* Not safe to use so skip */
184 static int rz1000_reinit_one(struct pci_dev *pdev)
186 /* If this fails on resume (which is a "cant happen" case), we
187 must stop as any progress risks data loss */
188 if (rz1000_fifo_disable(pdev))
189 panic("rz1000 fifo");
190 return ata_pci_device_resume(pdev);
194 static const struct pci_device_id pata_rz1000[] = {
195 { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), },
196 { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), },
201 static struct pci_driver rz1000_pci_driver = {
203 .id_table = pata_rz1000,
204 .probe = rz1000_init_one,
205 .remove = ata_pci_remove_one,
207 .suspend = ata_pci_device_suspend,
208 .resume = rz1000_reinit_one,
212 static int __init rz1000_init(void)
214 return pci_register_driver(&rz1000_pci_driver);
217 static void __exit rz1000_exit(void)
219 pci_unregister_driver(&rz1000_pci_driver);
222 MODULE_AUTHOR("Alan Cox");
223 MODULE_DESCRIPTION("low-level driver for RZ1000 PCI ATA");
224 MODULE_LICENSE("GPL");
225 MODULE_DEVICE_TABLE(pci, pata_rz1000);
226 MODULE_VERSION(DRV_VERSION);
228 module_init(rz1000_init);
229 module_exit(rz1000_exit);