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![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program see the file copying if not write to the free software foundation 675 mass ave cambridge ma 02139 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 52 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154042.342335923@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
163 lines
4.1 KiB
C
163 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* pata_ns87410.c - National Semiconductor 87410 PATA for new ATA layer
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* (C) 2006 Red Hat Inc
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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/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_ns87410"
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#define DRV_VERSION "0.4.6"
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/**
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* ns87410_pre_reset - probe begin
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* @link: ATA link
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* @deadline: deadline jiffies for the operation
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*
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* Check enabled ports
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*/
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static int ns87410_pre_reset(struct ata_link *link, unsigned long deadline)
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{
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struct ata_port *ap = link->ap;
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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static const struct pci_bits ns87410_enable_bits[] = {
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{ 0x43, 1, 0x08, 0x08 },
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{ 0x47, 1, 0x08, 0x08 }
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};
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if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no]))
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return -ENOENT;
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return ata_sff_prereset(link, deadline);
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}
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/**
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* ns87410_set_piomode - set initial PIO mode data
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* @ap: ATA interface
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* @adev: ATA device
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*
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* Program timing data. This is kept per channel not per device,
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* and only affects the data port.
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*/
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static void ns87410_set_piomode(struct ata_port *ap, struct ata_device *adev)
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{
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struct pci_dev *pdev = to_pci_dev(ap->host->dev);
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int port = 0x40 + 4 * ap->port_no;
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u8 idetcr, idefr;
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struct ata_timing at;
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static const u8 activebits[15] = {
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0, 1, 2, 3, 4,
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5, 5, 6, 6, 6,
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6, 7, 7, 7, 7
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};
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static const u8 recoverbits[12] = {
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0, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7
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};
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pci_read_config_byte(pdev, port + 3, &idefr);
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if (ata_pio_need_iordy(adev))
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idefr |= 0x04; /* IORDY enable */
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else
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idefr &= ~0x04;
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if (ata_timing_compute(adev, adev->pio_mode, &at, 30303, 1) < 0) {
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dev_err(&pdev->dev, "unknown mode %d\n", adev->pio_mode);
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return;
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}
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at.active = clamp_val(at.active, 2, 16) - 2;
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at.setup = clamp_val(at.setup, 1, 4) - 1;
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at.recover = clamp_val(at.recover, 1, 12) - 1;
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idetcr = (at.setup << 6) | (recoverbits[at.recover] << 3) | activebits[at.active];
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pci_write_config_byte(pdev, port, idetcr);
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pci_write_config_byte(pdev, port + 3, idefr);
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/* We use ap->private_data as a pointer to the device currently
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loaded for timing */
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ap->private_data = adev;
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}
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/**
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* ns87410_qc_issue - command issue
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* @qc: command pending
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*
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* Called when the libata layer is about to issue a command. We wrap
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* this interface so that we can load the correct ATA timings if
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* necessary.
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*/
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static unsigned int ns87410_qc_issue(struct ata_queued_cmd *qc)
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{
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struct ata_port *ap = qc->ap;
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struct ata_device *adev = qc->dev;
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/* If modes have been configured and the channel data is not loaded
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then load it. We have to check if pio_mode is set as the core code
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does not set adev->pio_mode to XFER_PIO_0 while probing as would be
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logical */
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if (adev->pio_mode && adev != ap->private_data)
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ns87410_set_piomode(ap, adev);
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return ata_sff_qc_issue(qc);
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}
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static struct scsi_host_template ns87410_sht = {
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ATA_PIO_SHT(DRV_NAME),
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};
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static struct ata_port_operations ns87410_port_ops = {
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.inherits = &ata_sff_port_ops,
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.qc_issue = ns87410_qc_issue,
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.cable_detect = ata_cable_40wire,
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.set_piomode = ns87410_set_piomode,
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.prereset = ns87410_pre_reset,
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};
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static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id)
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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_PIO3,
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.port_ops = &ns87410_port_ops
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};
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const struct ata_port_info *ppi[] = { &info, NULL };
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return ata_pci_sff_init_one(dev, ppi, &ns87410_sht, NULL, 0);
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}
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static const struct pci_device_id ns87410[] = {
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{ PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), },
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{ },
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};
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static struct pci_driver ns87410_pci_driver = {
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.name = DRV_NAME,
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.id_table = ns87410,
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.probe = ns87410_init_one,
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.remove = ata_pci_remove_one,
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#ifdef CONFIG_PM_SLEEP
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.suspend = ata_pci_device_suspend,
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.resume = ata_pci_device_resume,
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#endif
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};
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module_pci_driver(ns87410_pci_driver);
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("low-level driver for Nat Semi 87410");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(pci, ns87410);
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MODULE_VERSION(DRV_VERSION);
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