164 lines
4.1 KiB
C
164 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* pata_ns87410.c - National Semiconductor 87410 PATA for new ATA layer
|
|
* (C) 2006 Red Hat Inc
|
|
*/
|
|
|
|
#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_ns87410"
|
|
#define DRV_VERSION "0.4.6"
|
|
|
|
/**
|
|
* ns87410_pre_reset - probe begin
|
|
* @link: ATA link
|
|
* @deadline: deadline jiffies for the operation
|
|
*
|
|
* Check enabled ports
|
|
*/
|
|
|
|
static int ns87410_pre_reset(struct ata_link *link, unsigned long deadline)
|
|
{
|
|
struct ata_port *ap = link->ap;
|
|
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
|
|
static const struct pci_bits ns87410_enable_bits[] = {
|
|
{ 0x43, 1, 0x08, 0x08 },
|
|
{ 0x47, 1, 0x08, 0x08 }
|
|
};
|
|
|
|
if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no]))
|
|
return -ENOENT;
|
|
|
|
return ata_sff_prereset(link, deadline);
|
|
}
|
|
|
|
/**
|
|
* ns87410_set_piomode - set initial PIO mode data
|
|
* @ap: ATA interface
|
|
* @adev: ATA device
|
|
*
|
|
* Program timing data. This is kept per channel not per device,
|
|
* and only affects the data port.
|
|
*/
|
|
|
|
static void ns87410_set_piomode(struct ata_port *ap, struct ata_device *adev)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
|
|
int port = 0x40 + 4 * ap->port_no;
|
|
u8 idetcr, idefr;
|
|
struct ata_timing at;
|
|
|
|
static const u8 activebits[15] = {
|
|
0, 1, 2, 3, 4,
|
|
5, 5, 6, 6, 6,
|
|
6, 7, 7, 7, 7
|
|
};
|
|
|
|
static const u8 recoverbits[12] = {
|
|
0, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7
|
|
};
|
|
|
|
pci_read_config_byte(pdev, port + 3, &idefr);
|
|
|
|
if (ata_pio_need_iordy(adev))
|
|
idefr |= 0x04; /* IORDY enable */
|
|
else
|
|
idefr &= ~0x04;
|
|
|
|
if (ata_timing_compute(adev, adev->pio_mode, &at, 30303, 1) < 0) {
|
|
dev_err(&pdev->dev, "unknown mode %d\n", adev->pio_mode);
|
|
return;
|
|
}
|
|
|
|
at.active = clamp_val(at.active, 2, 16) - 2;
|
|
at.setup = clamp_val(at.setup, 1, 4) - 1;
|
|
at.recover = clamp_val(at.recover, 1, 12) - 1;
|
|
|
|
idetcr = (at.setup << 6) | (recoverbits[at.recover] << 3) | activebits[at.active];
|
|
|
|
pci_write_config_byte(pdev, port, idetcr);
|
|
pci_write_config_byte(pdev, port + 3, idefr);
|
|
/* We use ap->private_data as a pointer to the device currently
|
|
loaded for timing */
|
|
ap->private_data = adev;
|
|
}
|
|
|
|
/**
|
|
* ns87410_qc_issue - command issue
|
|
* @qc: command pending
|
|
*
|
|
* Called when the libata layer is about to issue a command. We wrap
|
|
* this interface so that we can load the correct ATA timings if
|
|
* necessary.
|
|
*/
|
|
|
|
static unsigned int ns87410_qc_issue(struct ata_queued_cmd *qc)
|
|
{
|
|
struct ata_port *ap = qc->ap;
|
|
struct ata_device *adev = qc->dev;
|
|
|
|
/* If modes have been configured and the channel data is not loaded
|
|
then load it. We have to check if pio_mode is set as the core code
|
|
does not set adev->pio_mode to XFER_PIO_0 while probing as would be
|
|
logical */
|
|
|
|
if (adev->pio_mode && adev != ap->private_data)
|
|
ns87410_set_piomode(ap, adev);
|
|
|
|
return ata_sff_qc_issue(qc);
|
|
}
|
|
|
|
static struct scsi_host_template ns87410_sht = {
|
|
ATA_PIO_SHT(DRV_NAME),
|
|
};
|
|
|
|
static struct ata_port_operations ns87410_port_ops = {
|
|
.inherits = &ata_sff_port_ops,
|
|
.qc_issue = ns87410_qc_issue,
|
|
.cable_detect = ata_cable_40wire,
|
|
.set_piomode = ns87410_set_piomode,
|
|
.prereset = ns87410_pre_reset,
|
|
};
|
|
|
|
static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id)
|
|
{
|
|
static const struct ata_port_info info = {
|
|
.flags = ATA_FLAG_SLAVE_POSS,
|
|
.pio_mask = ATA_PIO3,
|
|
.port_ops = &ns87410_port_ops
|
|
};
|
|
const struct ata_port_info *ppi[] = { &info, NULL };
|
|
return ata_pci_sff_init_one(dev, ppi, &ns87410_sht, NULL, 0);
|
|
}
|
|
|
|
static const struct pci_device_id ns87410[] = {
|
|
{ PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), },
|
|
|
|
{ },
|
|
};
|
|
|
|
static struct pci_driver ns87410_pci_driver = {
|
|
.name = DRV_NAME,
|
|
.id_table = ns87410,
|
|
.probe = ns87410_init_one,
|
|
.remove = ata_pci_remove_one,
|
|
#ifdef CONFIG_PM_SLEEP
|
|
.suspend = ata_pci_device_suspend,
|
|
.resume = ata_pci_device_resume,
|
|
#endif
|
|
};
|
|
|
|
module_pci_driver(ns87410_pci_driver);
|
|
|
|
MODULE_AUTHOR("Alan Cox");
|
|
MODULE_DESCRIPTION("low-level driver for Nat Semi 87410");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DEVICE_TABLE(pci, ns87410);
|
|
MODULE_VERSION(DRV_VERSION);
|