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16ea0fc98d
This allows parallel scan and the like to be set without having to stop using the existing full helper functions. This patch merely adds the argument and fixes up the callers. It doesn't undo the special cases already in the tree or add any new parallel callers. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
162 lines
4.0 KiB
C
162 lines
4.0 KiB
C
/*
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* RZ1000/1001 driver based upon
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*
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* linux/drivers/ide/pci/rz1000.c Version 0.06 January 12, 2003
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* Copyright (C) 1995-1998 Linus Torvalds & author (see below)
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* Principal Author: mlord@pobox.com (Mark Lord)
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*
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* See linux/MAINTAINERS for address of current maintainer.
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*
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* This file provides support for disabling the buggy read-ahead
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* mode of the RZ1000 IDE chipset, commonly used on Intel motherboards.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <scsi/scsi_host.h>
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#include <linux/libata.h>
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#define DRV_NAME "pata_rz1000"
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#define DRV_VERSION "0.2.4"
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/**
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* rz1000_set_mode - mode setting function
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* @link: ATA link
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* @unused: returned device on set_mode failure
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*
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* Use a non standard set_mode function. We don't want to be tuned. We
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* would prefer to be BIOS generic but for the fact our hardware is
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* whacked out.
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*/
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static int rz1000_set_mode(struct ata_link *link, struct ata_device **unused)
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{
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struct ata_device *dev;
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ata_for_each_dev(dev, link, ENABLED) {
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/* We don't really care */
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dev->pio_mode = XFER_PIO_0;
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dev->xfer_mode = XFER_PIO_0;
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dev->xfer_shift = ATA_SHIFT_PIO;
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dev->flags |= ATA_DFLAG_PIO;
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ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
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}
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return 0;
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}
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static struct scsi_host_template rz1000_sht = {
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ATA_PIO_SHT(DRV_NAME),
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};
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static struct ata_port_operations rz1000_port_ops = {
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.inherits = &ata_sff_port_ops,
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.cable_detect = ata_cable_40wire,
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.set_mode = rz1000_set_mode,
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};
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static int rz1000_fifo_disable(struct pci_dev *pdev)
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{
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u16 reg;
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/* Be exceptionally paranoid as we must be sure to apply the fix */
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if (pci_read_config_word(pdev, 0x40, ®) != 0)
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return -1;
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reg &= 0xDFFF;
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if (pci_write_config_word(pdev, 0x40, reg) != 0)
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return -1;
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printk(KERN_INFO DRV_NAME ": disabled chipset readahead.\n");
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return 0;
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}
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/**
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* rz1000_init_one - Register RZ1000 ATA PCI device with kernel services
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* @pdev: PCI device to register
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* @ent: Entry in rz1000_pci_tbl matching with @pdev
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*
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* Configure an RZ1000 interface. This doesn't require much special
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* handling except that we *MUST* kill the chipset readahead or the
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* user may experience data corruption.
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*/
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static int rz1000_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
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{
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static const struct ata_port_info info = {
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.flags = ATA_FLAG_SLAVE_POSS,
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.pio_mask = ATA_PIO4,
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.port_ops = &rz1000_port_ops
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};
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const struct ata_port_info *ppi[] = { &info, NULL };
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printk_once(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
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if (rz1000_fifo_disable(pdev) == 0)
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return ata_pci_sff_init_one(pdev, ppi, &rz1000_sht, NULL, 0);
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printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n");
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/* Not safe to use so skip */
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return -ENODEV;
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}
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#ifdef CONFIG_PM
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static int rz1000_reinit_one(struct pci_dev *pdev)
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{
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struct ata_host *host = dev_get_drvdata(&pdev->dev);
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int rc;
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rc = ata_pci_device_do_resume(pdev);
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if (rc)
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return rc;
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/* If this fails on resume (which is a "cant happen" case), we
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must stop as any progress risks data loss */
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if (rz1000_fifo_disable(pdev))
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panic("rz1000 fifo");
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ata_host_resume(host);
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return 0;
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}
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#endif
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static const struct pci_device_id pata_rz1000[] = {
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{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), },
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{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), },
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{ },
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};
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static struct pci_driver rz1000_pci_driver = {
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.name = DRV_NAME,
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.id_table = pata_rz1000,
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.probe = rz1000_init_one,
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.remove = ata_pci_remove_one,
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#ifdef CONFIG_PM
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.suspend = ata_pci_device_suspend,
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.resume = rz1000_reinit_one,
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#endif
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};
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static int __init rz1000_init(void)
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{
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return pci_register_driver(&rz1000_pci_driver);
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}
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static void __exit rz1000_exit(void)
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{
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pci_unregister_driver(&rz1000_pci_driver);
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}
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("low-level driver for RZ1000 PCI ATA");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, pata_rz1000);
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MODULE_VERSION(DRV_VERSION);
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module_init(rz1000_init);
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module_exit(rz1000_exit);
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