linux-imx

​

/*

 * Copyright (C) 2006       Red Hat

 *

 *  May be copied or modified under the terms of the GNU General Public License

 */

​

#include <linux/types.h>

#include <linux/module.h>

#include <linux/pci.h>

#include <linux/ide.h>

#include <linux/init.h>

​

#define DRV_NAME "jmicron"

​

typedef enum {

    PORT_PATA0 = 0,

    PORT_PATA1 = 1,

    PORT_SATA = 2,

} port_type;

​

/**

 *  jmicron_cable_detect    -   cable detection

 *  @hwif: IDE port

 *

 *  Returns the cable type.

 */

​

static u8 jmicron_cable_detect(ide_hwif_t *hwif)

{

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

​

    u32 control;

    u32 control5;

​

    int port = hwif->channel;

    port_type port_map[2];

​

    pci_read_config_dword(pdev, 0x40, &control);

​

    /* There are two basic mappings. One has the two SATA ports merged

       as master/slave and the secondary as PATA, the other has only the

       SATA port mapped */

    if (control & (1 << 23)) {

        port_map[0] = PORT_SATA;

        port_map[1] = PORT_PATA0;

    } else {

        port_map[0] = PORT_SATA;

        port_map[1] = PORT_SATA;

    }

​

    /* The 365/366 may have this bit set to map the second PATA port

       as the internal primary channel */

    pci_read_config_dword(pdev, 0x80, &control5);

    if (control5 & (1<<24))

        port_map[0] = PORT_PATA1;

​

    /* The two ports may then be logically swapped by the firmware */

    if (control & (1 << 22))

        port = port ^ 1;

​

    /*

     *  Now we know which physical port we are talking about we can