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... */ 102 103 static 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 148 149 static int ppa_engine(ppa_struct *, struct scsi_cmnd *); 150 151 #endif /* _PPA_H */ 152