1eca4365be
There currently are the following looping constructs. * __ata_port_for_each_link() for all available links * ata_port_for_each_link() for edge links * ata_link_for_each_dev() for all devices * ata_link_for_each_dev_reverse() for all devices in reverse order Now there's a need for looping construct which is similar to __ata_port_for_each_link() but iterates over PMP links before the host link. Instead of adding another one with long name, do the following cleanup. * Implement and export ata_link_next() and ata_dev_next() which take @mode parameter and can be used to build custom loop. * Implement ata_for_each_link() and ata_for_each_dev() which take looping mode explicitly. The following iteration modes are implemented. * ATA_LITER_EDGE : loop over edge links * ATA_LITER_HOST_FIRST : loop over all links, host link first * ATA_LITER_PMP_FIRST : loop over all links, PMP links first * ATA_DITER_ENABLED : loop over enabled devices * ATA_DITER_ENABLED_REVERSE : loop over enabled devices in reverse order * ATA_DITER_ALL : loop over all devices * ATA_DITER_ALL_REVERSE : loop over all devices in reverse order This change removes exlicit device enabledness checks from many loops and makes it clear which ones are iterated over in which direction. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
155 lines
3.9 KiB
C
155 lines
3.9 KiB
C
/*
|
|
* 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 "0.2.4"
|
|
|
|
|
|
/**
|
|
* rz1000_set_mode - mode setting function
|
|
* @link: ATA link
|
|
* @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_link *link, struct ata_device **unused)
|
|
{
|
|
struct ata_device *dev;
|
|
|
|
ata_for_each_dev(dev, link, ENABLED) {
|
|
/* 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;
|
|
ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct scsi_host_template rz1000_sht = {
|
|
ATA_PIO_SHT(DRV_NAME),
|
|
};
|
|
|
|
static struct ata_port_operations rz1000_port_ops = {
|
|
.inherits = &ata_sff_port_ops,
|
|
.cable_detect = ata_cable_40wire,
|
|
.set_mode = rz1000_set_mode,
|
|
};
|
|
|
|
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;
|
|
static const struct ata_port_info info = {
|
|
.flags = ATA_FLAG_SLAVE_POSS,
|
|
.pio_mask = 0x1f,
|
|
.port_ops = &rz1000_port_ops
|
|
};
|
|
const struct ata_port_info *ppi[] = { &info, NULL };
|
|
|
|
if (!printed_version++)
|
|
printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
|
|
|
|
if (rz1000_fifo_disable(pdev) == 0)
|
|
return ata_pci_sff_init_one(pdev, ppi, &rz1000_sht, NULL);
|
|
|
|
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);
|
|
|