forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
149 lines
3.8 KiB
149 lines
3.8 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* 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: [email protected] (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/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_info(dev, "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 const struct ata_port_info info = { |
|
.flags = ATA_FLAG_SLAVE_POSS, |
|
.pio_mask = ATA_PIO4, |
|
.port_ops = &rz1000_port_ops |
|
}; |
|
const struct ata_port_info *ppi[] = { &info, NULL }; |
|
|
|
ata_print_version_once(&pdev->dev, DRV_VERSION); |
|
|
|
if (rz1000_fifo_disable(pdev) == 0) |
|
return ata_pci_sff_init_one(pdev, ppi, &rz1000_sht, NULL, 0); |
|
|
|
printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n"); |
|
/* Not safe to use so skip */ |
|
return -ENODEV; |
|
} |
|
|
|
#ifdef CONFIG_PM_SLEEP |
|
static int rz1000_reinit_one(struct pci_dev *pdev) |
|
{ |
|
struct ata_host *host = pci_get_drvdata(pdev); |
|
int rc; |
|
|
|
rc = ata_pci_device_do_resume(pdev); |
|
if (rc) |
|
return rc; |
|
|
|
/* If this fails on resume (which is a "can't happen" case), we |
|
must stop as any progress risks data loss */ |
|
if (rz1000_fifo_disable(pdev)) |
|
panic("rz1000 fifo"); |
|
|
|
ata_host_resume(host); |
|
return 0; |
|
} |
|
#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_SLEEP |
|
.suspend = ata_pci_device_suspend, |
|
.resume = rz1000_reinit_one, |
|
#endif |
|
}; |
|
|
|
module_pci_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);
|
|
|