linux-imx

/*

 *  Promise PATA TX2/TX4/TX2000/133 IDE driver for pdc20268 to pdc20277.

 *

 *  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 of the License, or (at your option) any later version.

 *

 *  Ported to libata by:

 *  Albert Lee <albertcc@tw.ibm.com> IBM Corporation

 *

 *  Copyright (C) 1998-2002     Andre Hedrick <andre@linux-ide.org>

 *  Portions Copyright (C) 1999 Promise Technology, Inc.

 *

 *  Author: Frank Tiernan (frankt@promise.com)

 *  Released under terms of General Public License

 *

 *

 *  libata documentation is available via 'make {ps|pdf}docs',

 *  as Documentation/driver-api/libata.rst

 *

 *  Hardware information only available under NDA.

 *

 */

#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 <linux/ktime.h>

#include <scsi/scsi.h>

#include <scsi/scsi_host.h>

#include <scsi/scsi_cmnd.h>

#include <linux/libata.h>

​

#define DRV_NAME    "pata_pdc2027x"

#define DRV_VERSION "1.0"

#undef PDC_DEBUG

​

#ifdef PDC_DEBUG

#define PDPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args)

#else

#define PDPRINTK(fmt, args...)

#endif

​

enum {

    PDC_MMIO_BAR        = 5,

​

    PDC_UDMA_100        = 0,

    PDC_UDMA_133        = 1,

​

    PDC_100_MHZ     = 100000000,

    PDC_133_MHZ     = 133333333,

​

    PDC_SYS_CTL     = 0x1100,

    PDC_ATA_CTL     = 0x1104,

    PDC_GLOBAL_CTL      = 0x1108,

    PDC_CTCR0       = 0x110C,

    PDC_CTCR1       = 0x1110,

    PDC_BYTE_COUNT      = 0x1120,

    PDC_PLL_CTL     = 0x1202,

};

​

static int pdc2027x_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);

#ifdef CONFIG_PM_SLEEP

static int pdc2027x_reinit_one(struct pci_dev *pdev);

#endif

static int pdc2027x_prereset(struct ata_link *link, unsigned long deadline);

static void pdc2027x_set_piomode(struct ata_port *ap, struct ata_device *adev);

static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev);

static int pdc2027x_check_atapi_dma(struct ata_queued_cmd *qc);

static unsigned long pdc2027x_mode_filter(struct ata_device *adev, unsigned long mask);

static int pdc2027x_cable_detect(struct ata_port *ap);

static int pdc2027x_set_mode(struct ata_link *link, struct ata_device **r_failed);

​

/*

 * ATA Timing Tables based on 133MHz controller clock.

 * These tables are only used when the controller is in 133MHz clock.

 * If the controller is in 100MHz clock, the ASIC hardware will

 * set the timing registers automatically when "set feature" command

 * is issued to the device. However, if the controller clock is 133MHz,

 * the following tables must be used.

 */

static const struct pdc2027x_pio_timing {

    u8 value0, value1, value2;

} pdc2027x_pio_timing_tbl[] = {

    { 0xfb, 0x2b, 0xac }, /* PIO mode 0 */

    { 0x46, 0x29, 0xa4 }, /* PIO mode 1 */

    { 0x23, 0x26, 0x64 }, /* PIO mode 2 */

    { 0x27, 0x0d, 0x35 }, /* PIO mode 3, IORDY on, Prefetch off */

    { 0x23, 0x09, 0x25 }, /* PIO mode 4, IORDY on, Prefetch off */