--- /dev/null
+/*
+ * RZ1000/1001 driver based upon
+ *
+ * linux/drivers/ide/pci/rz1000.c Version 0.06 January 12, 2003
+ * Copyright (C) 1995-1998 Linus Torvalds & author (see below)
+ * Principal Author: mlord@pobox.com (Mark Lord)
+ *
+ * See linux/MAINTAINERS for address of current maintainer.
+ *
+ * This file provides support for disabling the buggy read-ahead
+ * mode of the RZ1000 IDE chipset, commonly used on Intel motherboards.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+
+#define DRV_NAME "pata_rz1000"
+#define DRV_VERSION "0.2.3"
+
+
+/**
+ * rz1000_prereset - probe begin
+ * @ap: ATA port
+ *
+ * Set up cable type and use generics
+ */
+
+static int rz1000_prereset(struct ata_port *ap)
+{
+ ap->cbl = ATA_CBL_PATA40;
+ return ata_std_prereset(ap);
+}
+
+/**
+ * rz1000_error_handler - probe reset
+ * @ap: ATA port
+ *
+ * Perform the ATA standard reset sequence
+ */
+
+static void rz1000_error_handler(struct ata_port *ap)
+{
+ ata_bmdma_drive_eh(ap, rz1000_prereset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/**
+ * rz1000_set_mode - mode setting function
+ * @ap: ATA interface
+ * @unused: returned device on set_mode failure
+ *
+ * Use a non standard set_mode function. We don't want to be tuned. We
+ * would prefer to be BIOS generic but for the fact our hardware is
+ * whacked out.
+ */
+
+static int rz1000_set_mode(struct ata_port *ap, struct ata_device **unused)
+{
+ int i;
+
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ struct ata_device *dev = &ap->device[i];
+ if (ata_dev_ready(dev)) {
+ /* We don't really care */
+ dev->pio_mode = XFER_PIO_0;
+ dev->xfer_mode = XFER_PIO_0;
+ dev->xfer_shift = ATA_SHIFT_PIO;
+ dev->flags |= ATA_DFLAG_PIO;
+ }
+ }
+ return 0;
+}
+
+
+static struct scsi_host_template rz1000_sht = {
+ .module = THIS_MODULE,
+ .name = DRV_NAME,
+ .ioctl = ata_scsi_ioctl,
+ .queuecommand = ata_scsi_queuecmd,
+ .can_queue = ATA_DEF_QUEUE,
+ .this_id = ATA_SHT_THIS_ID,
+ .sg_tablesize = LIBATA_MAX_PRD,
+ .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
+ .emulated = ATA_SHT_EMULATED,
+ .use_clustering = ATA_SHT_USE_CLUSTERING,
+ .proc_name = DRV_NAME,
+ .dma_boundary = ATA_DMA_BOUNDARY,
+ .slave_configure = ata_scsi_slave_config,
+ .slave_destroy = ata_scsi_slave_destroy,
+ .bios_param = ata_std_bios_param,
+#ifdef CONFIG_PM
+ .resume = ata_scsi_device_resume,
+ .suspend = ata_scsi_device_suspend,
+#endif
+};
+
+static struct ata_port_operations rz1000_port_ops = {
+ .set_mode = rz1000_set_mode,
+
+ .port_disable = ata_port_disable,
+ .tf_load = ata_tf_load,
+ .tf_read = ata_tf_read,
+ .check_status = ata_check_status,
+ .exec_command = ata_exec_command,
+ .dev_select = ata_std_dev_select,
+
+ .bmdma_setup = ata_bmdma_setup,
+ .bmdma_start = ata_bmdma_start,
+ .bmdma_stop = ata_bmdma_stop,
+ .bmdma_status = ata_bmdma_status,
+
+ .qc_prep = ata_qc_prep,
+ .qc_issue = ata_qc_issue_prot,
+
+ .data_xfer = ata_pio_data_xfer,
+
+ .freeze = ata_bmdma_freeze,
+ .thaw = ata_bmdma_thaw,
+ .error_handler = rz1000_error_handler,
+ .post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+ .irq_handler = ata_interrupt,
+ .irq_clear = ata_bmdma_irq_clear,
+
+ .port_start = ata_port_start,
+ .port_stop = ata_port_stop,
+ .host_stop = ata_host_stop
+};
+
+static int rz1000_fifo_disable(struct pci_dev *pdev)
+{
+ u16 reg;
+ /* Be exceptionally paranoid as we must be sure to apply the fix */
+ if (pci_read_config_word(pdev, 0x40, ®) != 0)
+ return -1;
+ reg &= 0xDFFF;
+ if (pci_write_config_word(pdev, 0x40, reg) != 0)
+ return -1;
+ printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n");
+ return 0;
+}
+
+/**
+ * rz1000_init_one - Register RZ1000 ATA PCI device with kernel services
+ * @pdev: PCI device to register
+ * @ent: Entry in rz1000_pci_tbl matching with @pdev
+ *
+ * Configure an RZ1000 interface. This doesn't require much special
+ * handling except that we *MUST* kill the chipset readahead or the
+ * user may experience data corruption.
+ */
+
+static int rz1000_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ static int printed_version;
+ struct ata_port_info *port_info[2];
+ static struct ata_port_info info = {
+ .sht = &rz1000_sht,
+ .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+ .pio_mask = 0x1f,
+ .port_ops = &rz1000_port_ops
+ };
+
+ if (!printed_version++)
+ printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
+
+ if (rz1000_fifo_disable(pdev) == 0) {
+ port_info[0] = &info;
+ port_info[1] = &info;
+ return ata_pci_init_one(pdev, port_info, 2);
+ }
+ printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n");
+ /* Not safe to use so skip */
+ return -ENODEV;
+}
+
+#ifdef CONFIG_PM
+static int rz1000_reinit_one(struct pci_dev *pdev)
+{
+ /* If this fails on resume (which is a "cant happen" case), we
+ must stop as any progress risks data loss */
+ if (rz1000_fifo_disable(pdev))
+ panic("rz1000 fifo");
+ return ata_pci_device_resume(pdev);
+}
+#endif
+
+static const struct pci_device_id pata_rz1000[] = {
+ { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), },
+ { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), },
+
+ { },
+};
+
+static struct pci_driver rz1000_pci_driver = {
+ .name = DRV_NAME,
+ .id_table = pata_rz1000,
+ .probe = rz1000_init_one,
+ .remove = ata_pci_remove_one,
+#ifdef CONFIG_PM
+ .suspend = ata_pci_device_suspend,
+ .resume = rz1000_reinit_one,
+#endif
+};
+
+static int __init rz1000_init(void)
+{
+ return pci_register_driver(&rz1000_pci_driver);
+}
+
+static void __exit rz1000_exit(void)
+{
+ pci_unregister_driver(&rz1000_pci_driver);
+}
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for RZ1000 PCI ATA");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, pata_rz1000);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(rz1000_init);
+module_exit(rz1000_exit);
+
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