mirror of
https://github.com/torvalds/linux.git
synced 2024-11-24 05:02:12 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
152 lines
5.0 KiB
C
152 lines
5.0 KiB
C
/* Driver for the PPA3 parallel port SCSI HBA embedded in
|
|
* the Iomega ZIP drive
|
|
*
|
|
* (c) 1996 Grant R. Guenther grant@torque.net
|
|
* David Campbell campbell@torque.net
|
|
*
|
|
* 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/config.h>
|
|
#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 */
|