linux-imx

// SPDX-License-Identifier: GPL-2.0-only

/* imm.c   --  low level driver for the IOMEGA MatchMaker

 * parallel port SCSI host adapter.

 * 

 * (The IMM is the embedded controller in the ZIP Plus drive.)

 * 

 * My unofficial company acronym list is 21 pages long:

 *      FLA:    Four letter acronym with built in facility for

 *              future expansion to five letters.

 */

​

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/blkdev.h>

#include <linux/parport.h>

#include <linux/workqueue.h>

#include <linux/delay.h>

#include <linux/slab.h>

#include <asm/io.h>

​

#include <scsi/scsi.h>

#include <scsi/scsi_cmnd.h>

#include <scsi/scsi_device.h>

#include <scsi/scsi_host.h>

​

/* The following #define is to avoid a clash with hosts.c */

#define IMM_PROBE_SPP   0x0001

#define IMM_PROBE_PS2   0x0002

#define IMM_PROBE_ECR   0x0010

#define IMM_PROBE_EPP17 0x0100

#define IMM_PROBE_EPP19 0x0200

​

​

typedef struct {

    struct pardevice *dev;  /* Parport device entry         */

    int base;       /* Actual port address          */

    int base_hi;        /* Hi Base address for ECP-ISA chipset */

    int mode;       /* Transfer mode                */

    struct scsi_cmnd *cur_cmd;  /* Current queued command       */

    struct delayed_work imm_tq; /* Polling interrupt stuff       */

    unsigned long jstart;   /* Jiffies at start             */

    unsigned failed:1;  /* Failure flag                 */

    unsigned dp:1;      /* Data phase present           */

    unsigned rd:1;      /* Read data in data phase      */

    unsigned wanted:1;  /* Parport sharing busy flag    */

    unsigned int dev_no;    /* Device number        */

    wait_queue_head_t *waiting;

    struct Scsi_Host *host;

    struct list_head list;

} imm_struct;

​

static void imm_reset_pulse(unsigned int base);

static int device_check(imm_struct *dev);

​

#include "imm.h"

​

static inline imm_struct *imm_dev(struct Scsi_Host *host)

{

    return *(imm_struct **)&host->hostdata;

}

​

static DEFINE_SPINLOCK(arbitration_lock);