linux-imx

/*

 *    pata_oldpiix.c - Intel PATA/SATA controllers

 *

 *  (C) 2005 Red Hat

 *

 *    Some parts based on ata_piix.c by Jeff Garzik and others.

 *

 *    Early PIIX differs significantly from the later PIIX as it lacks

 *    SITRE and the slave timing registers. This means that you have to

 *    set timing per channel, or be clever. Libata tells us whenever it

 *    does drive selection and we use this to reload the timings.

 *

 *    Because of these behaviour differences PIIX gets its own driver module.

 */

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/pci.h>

#include <linux/blkdev.h>

#include <linux/delay.h>

#include <linux/device.h>

#include <scsi/scsi_host.h>

#include <linux/libata.h>

#include <linux/ata.h>

​

#define DRV_NAME    "pata_oldpiix"

#define DRV_VERSION "0.5.5"

​

/**

 *  oldpiix_pre_reset       -   probe begin

 *  @link: ATA link

 *  @deadline: deadline jiffies for the operation

 *

 *  Set up cable type and use generic probe init

 */

​

static int oldpiix_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 oldpiix_enable_bits[] = {

        { 0x41U, 1U, 0x80UL, 0x80UL },  /* port 0 */

        { 0x43U, 1U, 0x80UL, 0x80UL },  /* port 1 */

    };

​

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

        return -ENOENT;

​

    return ata_sff_prereset(link, deadline);

}

​

/**

 *  oldpiix_set_piomode - Initialize host controller PATA PIO timings

 *  @ap: Port whose timings we are configuring

 *  @adev: Device whose timings we are configuring

 *

 *  Set PIO mode for device, in host controller PCI config space.

 *

 *  LOCKING:

 *  None (inherited from caller).

 */

​

static void oldpiix_set_piomode (struct ata_port *ap, struct ata_device *adev)