1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 21da177e4SLinus Torvalds /* Driver for the PPA3 parallel port SCSI HBA embedded in 31da177e4SLinus Torvalds * the Iomega ZIP drive 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * (c) 1996 Grant R. Guenther grant@torque.net 6bdca3f20SAdrian Bunk * David Campbell 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * All comments to David. 91da177e4SLinus Torvalds */ 101da177e4SLinus Torvalds 111da177e4SLinus Torvalds #ifndef _PPA_H 121da177e4SLinus Torvalds #define _PPA_H 131da177e4SLinus Torvalds 141da177e4SLinus Torvalds #define PPA_VERSION "2.07 (for Linux 2.4.x)" 151da177e4SLinus Torvalds 161da177e4SLinus Torvalds /* 171da177e4SLinus Torvalds * this driver has been hacked by Matteo Frigo (athena@theory.lcs.mit.edu) 181da177e4SLinus Torvalds * to support EPP and scatter-gather. [0.26-athena] 191da177e4SLinus Torvalds * 201da177e4SLinus Torvalds * additional hacks by David Campbell 211da177e4SLinus Torvalds * in response to this driver "mis-behaving" on his machine. 221da177e4SLinus Torvalds * Fixed EPP to handle "software" changing of EPP port data direction. 231da177e4SLinus Torvalds * Chased down EPP timeouts 241da177e4SLinus Torvalds * Made this driver "kernel version friendly" [0.28-athena] 251da177e4SLinus Torvalds * 261da177e4SLinus Torvalds * [ Stuff removed ] 271da177e4SLinus Torvalds * 281da177e4SLinus Torvalds * Corrected ppa.h for 2.1.x kernels (>=2.1.85) 291da177e4SLinus Torvalds * Modified "Nat Semi Kludge" for extended chipsets 301da177e4SLinus Torvalds * [1.41] 311da177e4SLinus Torvalds * 321da177e4SLinus Torvalds * Fixed id_probe for EPP 1.9 chipsets (misdetected as EPP 1.7) 331da177e4SLinus Torvalds * [1.42] 341da177e4SLinus Torvalds * 351da177e4SLinus Torvalds * Development solely for 2.1.x kernels from now on! 361da177e4SLinus Torvalds * [2.00] 371da177e4SLinus Torvalds * 381da177e4SLinus Torvalds * Hack and slash at the init code (EPP device check routine) 391da177e4SLinus Torvalds * Added INSANE option. 401da177e4SLinus Torvalds * [2.01] 411da177e4SLinus Torvalds * 421da177e4SLinus Torvalds * Patch applied to sync against the 2.1.x kernel code 431da177e4SLinus Torvalds * Included qboot_zip.sh 441da177e4SLinus Torvalds * [2.02] 451da177e4SLinus Torvalds * 461da177e4SLinus Torvalds * Cleaned up the mess left by someone else trying to fix the 471da177e4SLinus Torvalds * asm section to keep egcc happy. The asm section no longer 481da177e4SLinus Torvalds * exists, the nibble code is *almost* as fast as the asm code 491da177e4SLinus Torvalds * providing it is compiled with egcc. 501da177e4SLinus Torvalds * 511da177e4SLinus Torvalds * Other clean ups include the follow changes: 521da177e4SLinus Torvalds * CONFIG_SCSI_PPA_HAVE_PEDANTIC => CONFIG_SCSI_IZIP_EPP16 531da177e4SLinus Torvalds * added CONFIG_SCSI_IZIP_SLOW_CTR option 541da177e4SLinus Torvalds * [2.03] 551da177e4SLinus Torvalds * 561da177e4SLinus Torvalds * Use ppa_wait() to check for ready AND connected status bits 571da177e4SLinus Torvalds * Add ppa_wait() calls to ppa_completion() 581da177e4SLinus Torvalds * by Peter Cherriman <pjc@ecs.soton.ac.uk> and 591da177e4SLinus Torvalds * Tim Waugh <twaugh@redhat.com> 601da177e4SLinus Torvalds * [2.04] 611da177e4SLinus Torvalds * 621da177e4SLinus Torvalds * Fix kernel panic on scsi timeout, 2000-08-18 [2.05] 631da177e4SLinus Torvalds * 641da177e4SLinus Torvalds * Avoid io_request_lock problems. 651da177e4SLinus Torvalds * John Cavan <johncavan@home.com> [2.06] 661da177e4SLinus Torvalds * 671da177e4SLinus Torvalds * Busy wait for connected status bit in ppa_completion() 681da177e4SLinus Torvalds * in order to cope with some hardware that has this bit low 691da177e4SLinus Torvalds * for short periods of time. 701da177e4SLinus Torvalds * Add udelay() to ppa_select() 711da177e4SLinus Torvalds * by Peter Cherriman <pjc@ecs.soton.ac.uk> and 721da177e4SLinus Torvalds * Oleg Makarenko <omakarenko@cyberplat.ru> 731da177e4SLinus Torvalds * [2.07] 741da177e4SLinus Torvalds */ 751da177e4SLinus Torvalds /* ------ END OF USER CONFIGURABLE PARAMETERS ----- */ 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds #include <linux/stddef.h> 781da177e4SLinus Torvalds #include <linux/module.h> 791da177e4SLinus Torvalds #include <linux/kernel.h> 801da177e4SLinus Torvalds #include <linux/ioport.h> 811da177e4SLinus Torvalds #include <linux/delay.h> 821da177e4SLinus Torvalds #include <linux/proc_fs.h> 831da177e4SLinus Torvalds #include <linux/stat.h> 841da177e4SLinus Torvalds #include <linux/blkdev.h> 851da177e4SLinus Torvalds #include <linux/sched.h> 861da177e4SLinus Torvalds #include <linux/interrupt.h> 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds #include <asm/io.h> 891da177e4SLinus Torvalds #include <scsi/scsi_host.h> 901da177e4SLinus Torvalds /* batteries not included :-) */ 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds /* 931da177e4SLinus Torvalds * modes in which the driver can operate 941da177e4SLinus Torvalds */ 951da177e4SLinus Torvalds #define PPA_AUTODETECT 0 /* Autodetect mode */ 961da177e4SLinus Torvalds #define PPA_NIBBLE 1 /* work in standard 4 bit mode */ 971da177e4SLinus Torvalds #define PPA_PS2 2 /* PS/2 byte mode */ 981da177e4SLinus Torvalds #define PPA_EPP_8 3 /* EPP mode, 8 bit */ 991da177e4SLinus Torvalds #define PPA_EPP_16 4 /* EPP mode, 16 bit */ 1001da177e4SLinus Torvalds #define PPA_EPP_32 5 /* EPP mode, 32 bit */ 1011da177e4SLinus Torvalds #define PPA_UNKNOWN 6 /* Just in case... */ 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds static char *PPA_MODE_STRING[] = 1041da177e4SLinus Torvalds { 1051da177e4SLinus Torvalds "Autodetect", 1061da177e4SLinus Torvalds "SPP", 1071da177e4SLinus Torvalds "PS/2", 1081da177e4SLinus Torvalds "EPP 8 bit", 1091da177e4SLinus Torvalds "EPP 16 bit", 1101da177e4SLinus Torvalds "EPP 32 bit", 1111da177e4SLinus Torvalds "Unknown"}; 1121da177e4SLinus Torvalds 1131da177e4SLinus Torvalds /* other options */ 1141da177e4SLinus Torvalds #define PPA_BURST_SIZE 512 /* data burst size */ 1151da177e4SLinus Torvalds #define PPA_SELECT_TMO 5000 /* how long to wait for target ? */ 1161da177e4SLinus Torvalds #define PPA_SPIN_TMO 50000 /* ppa_wait loop limiter */ 1171da177e4SLinus Torvalds #define PPA_RECON_TMO 500 /* scsi reconnection loop limiter */ 1181da177e4SLinus Torvalds #define PPA_DEBUG 0 /* debugging option */ 1191da177e4SLinus Torvalds #define IN_EPP_MODE(x) (x == PPA_EPP_8 || x == PPA_EPP_16 || x == PPA_EPP_32) 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds /* args to ppa_connect */ 1221da177e4SLinus Torvalds #define CONNECT_EPP_MAYBE 1 1231da177e4SLinus Torvalds #define CONNECT_NORMAL 0 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds #define r_dtr(x) (unsigned char)inb((x)) 1261da177e4SLinus Torvalds #define r_str(x) (unsigned char)inb((x)+1) 1271da177e4SLinus Torvalds #define r_ctr(x) (unsigned char)inb((x)+2) 1281da177e4SLinus Torvalds #define r_epp(x) (unsigned char)inb((x)+4) 1291da177e4SLinus Torvalds #define r_fifo(x) (unsigned char)inb((x)) /* x must be base_hi */ 1301da177e4SLinus Torvalds /* On PCI is base+0x400 != base_hi */ 1311da177e4SLinus Torvalds #define r_ecr(x) (unsigned char)inb((x)+0x2) /* x must be base_hi */ 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds #define w_dtr(x,y) outb(y, (x)) 1341da177e4SLinus Torvalds #define w_str(x,y) outb(y, (x)+1) 1351da177e4SLinus Torvalds #define w_epp(x,y) outb(y, (x)+4) 1361da177e4SLinus Torvalds #define w_fifo(x,y) outb(y, (x)) /* x must be base_hi */ 1371da177e4SLinus Torvalds #define w_ecr(x,y) outb(y, (x)+0x2)/* x must be base_hi */ 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds #ifdef CONFIG_SCSI_IZIP_SLOW_CTR 1401da177e4SLinus Torvalds #define w_ctr(x,y) outb_p(y, (x)+2) 1411da177e4SLinus Torvalds #else 1421da177e4SLinus Torvalds #define w_ctr(x,y) outb(y, (x)+2) 1431da177e4SLinus Torvalds #endif 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds static int ppa_engine(ppa_struct *, struct scsi_cmnd *); 1461da177e4SLinus Torvalds 1471da177e4SLinus Torvalds #endif /* _PPA_H */ 148