cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

ppa.h (5123B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*  Driver for the PPA3 parallel port SCSI HBA embedded in 
      3 * the Iomega ZIP drive
      4 * 
      5 * (c) 1996     Grant R. Guenther  grant@torque.net
      6 *              David Campbell
      7 *
      8 *      All comments to David.
      9 */
     10
     11#ifndef _PPA_H
     12#define _PPA_H
     13
     14#define   PPA_VERSION   "2.07 (for Linux 2.4.x)"
     15
     16/* 
     17 * this driver has been hacked by Matteo Frigo (athena@theory.lcs.mit.edu)
     18 * to support EPP and scatter-gather.                        [0.26-athena]
     19 *
     20 * additional hacks by David Campbell
     21 * in response to this driver "mis-behaving" on his machine.
     22 *      Fixed EPP to handle "software" changing of EPP port data direction.
     23 *      Chased down EPP timeouts
     24 *      Made this driver "kernel version friendly"           [0.28-athena]
     25 *
     26 * [ Stuff removed ]
     27 *
     28 * Corrected ppa.h for 2.1.x kernels (>=2.1.85)
     29 * Modified "Nat Semi Kludge" for extended chipsets
     30 *                                                      [1.41]
     31 *
     32 * Fixed id_probe for EPP 1.9 chipsets (misdetected as EPP 1.7)
     33 *                                                      [1.42]
     34 *
     35 * Development solely for 2.1.x kernels from now on!
     36 *                                                      [2.00]
     37 *
     38 * Hack and slash at the init code (EPP device check routine)
     39 * Added INSANE option.
     40 *                                                      [2.01]
     41 *
     42 * Patch applied to sync against the 2.1.x kernel code
     43 * Included qboot_zip.sh
     44 *                                                      [2.02]
     45 *
     46 * Cleaned up the mess left by someone else trying to fix the
     47 * asm section to keep egcc happy. The asm section no longer
     48 * exists, the nibble code is *almost* as fast as the asm code
     49 * providing it is compiled with egcc.
     50 *
     51 * Other clean ups include the follow changes:
     52 *    CONFIG_SCSI_PPA_HAVE_PEDANTIC => CONFIG_SCSI_IZIP_EPP16
     53 *    added CONFIG_SCSI_IZIP_SLOW_CTR option
     54 *                                                      [2.03]
     55 *
     56 * Use ppa_wait() to check for ready AND connected status bits
     57 * Add ppa_wait() calls to ppa_completion()
     58 *  by Peter Cherriman <pjc@ecs.soton.ac.uk> and
     59 *     Tim Waugh <twaugh@redhat.com>
     60 *							[2.04]
     61 *
     62 * Fix kernel panic on scsi timeout, 2000-08-18		[2.05]
     63 *
     64 * Avoid io_request_lock problems.
     65 * John Cavan <johncavan@home.com>			[2.06]
     66 *
     67 * Busy wait for connected status bit in ppa_completion()
     68 *  in order to cope with some hardware that has this bit low
     69 *  for short periods of time.
     70 * Add udelay() to ppa_select()
     71 *  by Peter Cherriman <pjc@ecs.soton.ac.uk> and
     72 *     Oleg Makarenko <omakarenko@cyberplat.ru>         
     73 *                                                      [2.07]
     74 */
     75/* ------ END OF USER CONFIGURABLE PARAMETERS ----- */
     76
     77#include  <linux/stddef.h>
     78#include  <linux/module.h>
     79#include  <linux/kernel.h>
     80#include  <linux/ioport.h>
     81#include  <linux/delay.h>
     82#include  <linux/proc_fs.h>
     83#include  <linux/stat.h>
     84#include  <linux/blkdev.h>
     85#include  <linux/sched.h>
     86#include  <linux/interrupt.h>
     87
     88#include  <asm/io.h>
     89#include  <scsi/scsi_host.h>
     90/* batteries not included :-) */
     91
     92/*
     93 * modes in which the driver can operate 
     94 */
     95#define   PPA_AUTODETECT        0	/* Autodetect mode                */
     96#define   PPA_NIBBLE            1	/* work in standard 4 bit mode    */
     97#define   PPA_PS2               2	/* PS/2 byte mode         */
     98#define   PPA_EPP_8             3	/* EPP mode, 8 bit                */
     99#define   PPA_EPP_16            4	/* EPP mode, 16 bit               */
    100#define   PPA_EPP_32            5	/* EPP mode, 32 bit               */
    101#define   PPA_UNKNOWN           6	/* Just in case...                */
    102
    103static char *PPA_MODE_STRING[] =
    104{
    105    "Autodetect",
    106    "SPP",
    107    "PS/2",
    108    "EPP 8 bit",
    109    "EPP 16 bit",
    110#ifdef CONFIG_SCSI_IZIP_EPP16
    111    "EPP 16 bit",
    112#else
    113    "EPP 32 bit",
    114#endif
    115    "Unknown"};
    116
    117/* other options */
    118#define PPA_BURST_SIZE	512	/* data burst size */
    119#define PPA_SELECT_TMO  5000	/* how long to wait for target ? */
    120#define PPA_SPIN_TMO    50000	/* ppa_wait loop limiter */
    121#define PPA_RECON_TMO   500	/* scsi reconnection loop limiter */
    122#define PPA_DEBUG	0	/* debugging option */
    123#define IN_EPP_MODE(x) (x == PPA_EPP_8 || x == PPA_EPP_16 || x == PPA_EPP_32)
    124
    125/* args to ppa_connect */
    126#define CONNECT_EPP_MAYBE 1
    127#define CONNECT_NORMAL  0
    128
    129#define r_dtr(x)        (unsigned char)inb((x))
    130#define r_str(x)        (unsigned char)inb((x)+1)
    131#define r_ctr(x)        (unsigned char)inb((x)+2)
    132#define r_epp(x)        (unsigned char)inb((x)+4)
    133#define r_fifo(x)       (unsigned char)inb((x)) /* x must be base_hi */
    134					/* On PCI is base+0x400 != base_hi */
    135#define r_ecr(x)        (unsigned char)inb((x)+0x2) /* x must be base_hi */
    136
    137#define w_dtr(x,y)      outb(y, (x))
    138#define w_str(x,y)      outb(y, (x)+1)
    139#define w_epp(x,y)      outb(y, (x)+4)
    140#define w_fifo(x,y)     outb(y, (x))	/* x must be base_hi */
    141#define w_ecr(x,y)      outb(y, (x)+0x2)/* x must be base_hi */
    142
    143#ifdef CONFIG_SCSI_IZIP_SLOW_CTR
    144#define w_ctr(x,y)      outb_p(y, (x)+2)
    145#else
    146#define w_ctr(x,y)      outb(y, (x)+2)
    147#endif
    148
    149static int ppa_engine(ppa_struct *, struct scsi_cmnd *);
    150
    151#endif				/* _PPA_H */