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/* SPDX-License-Identifier: GPL-2.0 */
/* Driver for the Iomega MatchMaker parallel port SCSI HBA embedded in
* the Iomega ZIP Plus drive
*
* (c) 1998 David Campbell
*
* Please note that I live in Perth, Western Australia. GMT+0800
*/
#ifndef _IMM_H
#define _IMM_H
#define IMM_VERSION "2.05 (for Linux 2.4.0)"
/*
* 10 Apr 1998 (Good Friday) - Received EN144302 by email from Iomega.
* Scarry thing is the level of support from one of their managers.
* The onus is now on us (the developers) to shut up and start coding.
* 11Apr98 [ 0.10 ]
*
* --- SNIP ---
*
* It manages to find the drive which is a good start. Writing data during
* data phase is known to be broken (due to requirements of two byte writes).
* Removing "Phase" debug messages.
*
* PS: Took four hours of coding after I bought a drive.
* ANZAC Day (Aus "War Veterans Holiday") 25Apr98 [ 0.14 ]
*
* Ten minutes later after a few fixes.... (LITERALLY!!!)
* Have mounted disk, copied file, dismounted disk, remount disk, diff file
* ----- It actually works!!! -----
* 25Apr98 [ 0.15 ]
*
* Twenty minutes of mucking around, rearanged the IEEE negotiate mechanism.
* Now have byte mode working (only EPP and ECP to go now... :=)
* 26Apr98 [ 0.16 ]
*
* Thirty minutes of further coding results in EPP working on my machine.
* 27Apr98 [ 0.17 ]
*
* Due to work commitments and inability to get a "true" ECP mode functioning
* I have decided to code the parport support into imm.
* 09Jun98 [ 0.18 ]
*
* Driver is now out of beta testing.
* Support for parport has been added.
* Now distributed with the ppa driver.
* 12Jun98 [ 2.00 ]
*
* Err.. It appears that imm-2.00 was broken....
* 18Jun98 [ 2.01 ]
*
* Patch applied to sync this against the Linux 2.1.x kernel code
* Included qboot_zip.sh
* 21Jun98 [ 2.02 ]
*
* Other clean ups include the follow changes:
* CONFIG_SCSI_PPA_HAVE_PEDANTIC => CONFIG_SCSI_IZIP_EPP16
* added CONFIG_SCSI_IZIP_SLOW_CTR option
* [2.03]
* Fix kernel panic on scsi timeout. 20Aug00 [2.04]
*
* Avoid io_request_lock problems.
* John Cavan <johncavan@home.com> 16Nov00 [2.05]
*/
/* ------ END OF USER CONFIGURABLE PARAMETERS ----- */
#include <linux/stddef.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/blkdev.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <asm/io.h>
#include <scsi/scsi_host.h>
/* batteries not included :-) */
/*
* modes in which the driver can operate
*/
#define IMM_AUTODETECT 0 /* Autodetect mode */
#define IMM_NIBBLE 1 /* work in standard 4 bit mode */
#define IMM_PS2 2 /* PS/2 byte mode */
#define IMM_EPP_8 3 /* EPP mode, 8 bit */
#define IMM_EPP_16 4 /* EPP mode, 16 bit */
#define IMM_EPP_32 5 /* EPP mode, 32 bit */
#define IMM_UNKNOWN 6 /* Just in case... */
static char *IMM_MODE_STRING[] =
{
[IMM_AUTODETECT] = "Autodetect",
[IMM_NIBBLE] = "SPP",
[IMM_PS2] = "PS/2",
[IMM_EPP_8] = "EPP 8 bit",
[IMM_EPP_16] = "EPP 16 bit",
[IMM_EPP_32] = "EPP 32 bit",
[IMM_UNKNOWN] = "Unknown",
};
/* other options */
#define IMM_BURST_SIZE 512 /* data burst size */
#define IMM_SELECT_TMO 500 /* 500 how long to wait for target ? */
#define IMM_SPIN_TMO 5000 /* 50000 imm_wait loop limiter */
#define IMM_DEBUG 0 /* debugging option */
#define IN_EPP_MODE(x) (x == IMM_EPP_8 || x == IMM_EPP_16 || x == IMM_EPP_32)
/* args to imm_connect */
#define CONNECT_EPP_MAYBE 1
#define CONNECT_NORMAL 0
#define r_dtr(x) (unsigned char)inb((x))
#define r_str(x) (unsigned char)inb((x)+1)
#define r_ctr(x) (unsigned char)inb((x)+2)
#define r_epp(x) (unsigned char)inb((x)+4)
#define r_fifo(x) (unsigned char)inb((x)) /* x must be base_hi */
/* On PCI is: base+0x400 != base_hi */
#define r_ecr(x) (unsigned char)inb((x)+2) /* x must be base_hi */
#define w_dtr(x,y) outb(y, (x))
#define w_str(x,y) outb(y, (x)+1)
#define w_epp(x,y) outb(y, (x)+4)
#define w_fifo(x,y) outb(y, (x)) /* x must be base_hi */
#define w_ecr(x,y) outb(y, (x)+0x2) /* x must be base_hi */
#ifdef CONFIG_SCSI_IZIP_SLOW_CTR
#define w_ctr(x,y) outb_p(y, (x)+2)
#else
#define w_ctr(x,y) outb(y, (x)+2)
#endif
static inline struct scsi_pointer *imm_scsi_pointer(struct scsi_cmnd *cmd)
{
return scsi_cmd_priv(cmd);
}
static int imm_engine(imm_struct *, struct scsi_cmnd *);
#endif /* _IMM_H */
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