linux-imx

/*

 * pata_cypress.c   - Cypress PATA for new ATA layer

 *            (C) 2006 Red Hat Inc

 *            Alan Cox

 *

 * Based heavily on

 * linux/drivers/ide/pci/cy82c693.c     Version 0.40    Sep. 10, 2002

 *

 */

​

#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_cypress"

#define DRV_VERSION "0.1.5"

​

/* here are the offset definitions for the registers */

​

enum {

    CY82_IDE_CMDREG     = 0x04,

    CY82_IDE_ADDRSETUP  = 0x48,

    CY82_IDE_MASTER_IOR = 0x4C,

    CY82_IDE_MASTER_IOW = 0x4D,

    CY82_IDE_SLAVE_IOR  = 0x4E,

    CY82_IDE_SLAVE_IOW  = 0x4F,

    CY82_IDE_MASTER_8BIT    = 0x50,

    CY82_IDE_SLAVE_8BIT = 0x51,

​

    CY82_INDEX_PORT     = 0x22,

    CY82_DATA_PORT      = 0x23,

​

    CY82_INDEX_CTRLREG1 = 0x01,

    CY82_INDEX_CHANNEL0 = 0x30,

    CY82_INDEX_CHANNEL1 = 0x31,

    CY82_INDEX_TIMEOUT  = 0x32

};

​

/**

 *  cy82c693_set_piomode    -   set initial PIO mode data

 *  @ap: ATA interface

 *  @adev: ATA device

 *

 *  Called to do the PIO mode setup.

 */

​

static void cy82c693_set_piomode(struct ata_port *ap, struct ata_device *adev)

{

    struct pci_dev *pdev = to_pci_dev(ap->host->dev);

    struct ata_timing t;

    const unsigned long T = 1000000 / 33;

    short time_16, time_8;

    u32 addr;

​

    if (ata_timing_compute(adev, adev->pio_mode, &t, T, 1) < 0) {

        printk(KERN_ERR DRV_NAME ": mome computation failed.\n");

        return;

    }

​