linux-imx

/*

 * pata_opti.c  - ATI PATA for new ATA layer

 *            (C) 2005 Red Hat Inc

 *

 * Based on

 *  linux/drivers/ide/pci/opti621.c     Version 0.7 Sept 10, 2002

 *

 *  Copyright (C) 1996-1998  Linus Torvalds & authors (see below)

 *

 * Authors:

 * Jaromir Koutek <miri@punknet.cz>,

 * Jan Harkes <jaharkes@cwi.nl>,

 * Mark Lord <mlord@pobox.com>

 * Some parts of code are from ali14xx.c and from rz1000.c.

 *

 * Also consulted the FreeBSD prototype driver by Kevin Day to try

 * and resolve some confusions. Further documentation can be found in

 * Ralf Brown's interrupt list

 *

 * If you have other variants of the Opti range (Viper/Vendetta) please

 * try this driver with those PCI idents and report back. For the later

 * chips see the pata_optidma driver

 *

 */

​

#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_opti"

#define DRV_VERSION "0.2.9"

​

enum {

    READ_REG    = 0,    /* index of Read cycle timing register */

    WRITE_REG   = 1,    /* index of Write cycle timing register */

    CNTRL_REG   = 3,    /* index of Control register */

    STRAP_REG   = 5,    /* index of Strap register */

    MISC_REG    = 6 /* index of Miscellaneous register */

};

​

/**

 *  opti_pre_reset      -   probe begin

 *  @link: ATA link

 *  @deadline: deadline jiffies for the operation

 *

 *  Set up cable type and use generic probe init

 */

​

static int opti_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 opti_enable_bits[] = {

        { 0x45, 1, 0x80, 0x00 },

        { 0x40, 1, 0x08, 0x00 }

    };

​

    if (!pci_test_config_bits(pdev, &opti_enable_bits[ap->port_no]))

        return -ENOENT;