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