Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

151 lines (136 sloc) 5.084 kb
/* Driver for the PPA3 parallel port SCSI HBA embedded in
* the Iomega ZIP drive
*
* (c) 1996 Grant R. Guenther grant@torque.net
* David Campbell
*
* All comments to David.
*/
#ifndef _PPA_H
#define _PPA_H
#define PPA_VERSION "2.07 (for Linux 2.4.x)"
/*
* this driver has been hacked by Matteo Frigo (athena@theory.lcs.mit.edu)
* to support EPP and scatter-gather. [0.26-athena]
*
* additional hacks by David Campbell
* in response to this driver "mis-behaving" on his machine.
* Fixed EPP to handle "software" changing of EPP port data direction.
* Chased down EPP timeouts
* Made this driver "kernel version friendly" [0.28-athena]
*
* [ Stuff removed ]
*
* Corrected ppa.h for 2.1.x kernels (>=2.1.85)
* Modified "Nat Semi Kludge" for extended chipsets
* [1.41]
*
* Fixed id_probe for EPP 1.9 chipsets (misdetected as EPP 1.7)
* [1.42]
*
* Development solely for 2.1.x kernels from now on!
* [2.00]
*
* Hack and slash at the init code (EPP device check routine)
* Added INSANE option.
* [2.01]
*
* Patch applied to sync against the 2.1.x kernel code
* Included qboot_zip.sh
* [2.02]
*
* Cleaned up the mess left by someone else trying to fix the
* asm section to keep egcc happy. The asm section no longer
* exists, the nibble code is *almost* as fast as the asm code
* providing it is compiled with egcc.
*
* 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]
*
* Use ppa_wait() to check for ready AND connected status bits
* Add ppa_wait() calls to ppa_completion()
* by Peter Cherriman <pjc@ecs.soton.ac.uk> and
* Tim Waugh <twaugh@redhat.com>
* [2.04]
*
* Fix kernel panic on scsi timeout, 2000-08-18 [2.05]
*
* Avoid io_request_lock problems.
* John Cavan <johncavan@home.com> [2.06]
*
* Busy wait for connected status bit in ppa_completion()
* in order to cope with some hardware that has this bit low
* for short periods of time.
* Add udelay() to ppa_select()
* by Peter Cherriman <pjc@ecs.soton.ac.uk> and
* Oleg Makarenko <omakarenko@cyberplat.ru>
* [2.07]
*/
/* ------ 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 PPA_AUTODETECT 0 /* Autodetect mode */
#define PPA_NIBBLE 1 /* work in standard 4 bit mode */
#define PPA_PS2 2 /* PS/2 byte mode */
#define PPA_EPP_8 3 /* EPP mode, 8 bit */
#define PPA_EPP_16 4 /* EPP mode, 16 bit */
#define PPA_EPP_32 5 /* EPP mode, 32 bit */
#define PPA_UNKNOWN 6 /* Just in case... */
static char *PPA_MODE_STRING[] =
{
"Autodetect",
"SPP",
"PS/2",
"EPP 8 bit",
"EPP 16 bit",
#ifdef CONFIG_SCSI_IZIP_EPP16
"EPP 16 bit",
#else
"EPP 32 bit",
#endif
"Unknown"};
/* other options */
#define PPA_BURST_SIZE 512 /* data burst size */
#define PPA_SELECT_TMO 5000 /* how long to wait for target ? */
#define PPA_SPIN_TMO 50000 /* ppa_wait loop limiter */
#define PPA_RECON_TMO 500 /* scsi reconnection loop limiter */
#define PPA_DEBUG 0 /* debugging option */
#define IN_EPP_MODE(x) (x == PPA_EPP_8 || x == PPA_EPP_16 || x == PPA_EPP_32)
/* args to ppa_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)+0x2) /* 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 int ppa_engine(ppa_struct *, struct scsi_cmnd *);
#endif /* _PPA_H */
Jump to Line
Something went wrong with that request. Please try again.