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1/* SPDX-License-Identifier: GPL-2.0 */2/* Driver for the PPA3 parallel port SCSI HBA embedded in 3 * the Iomega ZIP drive4 * 5 * (c) 1996 Grant R. Guenther grant@torque.net6 * David Campbell7 *8 * All comments to David.9 */10 11#ifndef _PPA_H12#define _PPA_H13 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 Campbell21 * 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 timeouts24 * 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 chipsets30 * [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 code43 * Included qboot_zip.sh44 * [2.02]45 *46 * Cleaned up the mess left by someone else trying to fix the47 * asm section to keep egcc happy. The asm section no longer48 * exists, the nibble code is *almost* as fast as the asm code49 * providing it is compiled with egcc.50 *51 * Other clean ups include the follow changes:52 * CONFIG_SCSI_PPA_HAVE_PEDANTIC => CONFIG_SCSI_IZIP_EPP1653 * added CONFIG_SCSI_IZIP_SLOW_CTR option54 * [2.03]55 *56 * Use ppa_wait() to check for ready AND connected status bits57 * Add ppa_wait() calls to ppa_completion()58 * by Peter Cherriman <pjc@ecs.soton.ac.uk> and59 * 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 low69 * for short periods of time.70 * Add udelay() to ppa_select()71 * by Peter Cherriman <pjc@ecs.soton.ac.uk> and72 * 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 "EPP 32 bit",111 "Unknown"};112 113/* other options */114#define PPA_BURST_SIZE 512 /* data burst size */115#define PPA_SELECT_TMO 5000 /* how long to wait for target ? */116#define PPA_SPIN_TMO 50000 /* ppa_wait loop limiter */117#define PPA_RECON_TMO 500 /* scsi reconnection loop limiter */118#define PPA_DEBUG 0 /* debugging option */119#define IN_EPP_MODE(x) (x == PPA_EPP_8 || x == PPA_EPP_16 || x == PPA_EPP_32)120 121/* args to ppa_connect */122#define CONNECT_EPP_MAYBE 1123#define CONNECT_NORMAL 0124 125#define r_dtr(x) (unsigned char)inb((x))126#define r_str(x) (unsigned char)inb((x)+1)127#define r_ctr(x) (unsigned char)inb((x)+2)128#define r_epp(x) (unsigned char)inb((x)+4)129#define r_fifo(x) (unsigned char)inb((x)) /* x must be base_hi */130 /* On PCI is base+0x400 != base_hi */131#define r_ecr(x) (unsigned char)inb((x)+0x2) /* x must be base_hi */132 133#define w_dtr(x,y) outb(y, (x))134#define w_str(x,y) outb(y, (x)+1)135#define w_epp(x,y) outb(y, (x)+4)136#define w_fifo(x,y) outb(y, (x)) /* x must be base_hi */137#define w_ecr(x,y) outb(y, (x)+0x2)/* x must be base_hi */138 139#ifdef CONFIG_SCSI_IZIP_SLOW_CTR140#define w_ctr(x,y) outb_p(y, (x)+2)141#else142#define w_ctr(x,y) outb(y, (x)+2)143#endif144 145static int ppa_engine(ppa_struct *, struct scsi_cmnd *);146 147#endif /* _PPA_H */148