1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 /* Driver for the Iomega MatchMaker parallel port SCSI HBA embedded in 4 * the Iomega ZIP Plus drive 5 * 6 * (c) 1998 David Campbell 7 * 8 * Please note that I live in Perth, Western Australia. GMT+0800 9 */ 10 11 #ifndef _IMM_H 12 #define _IMM_H 13 14 #define IMM_VERSION "2.05 (for Linux 2.4.0)" 15 16 /* 17 * 10 Apr 1998 (Good Friday) - Received EN144302 by email from Iomega. 18 * Scarry thing is the level of support from one of their managers. 19 * The onus is now on us (the developers) to shut up and start coding. 20 * 11Apr98 [ 0.10 ] 21 * 22 * --- SNIP --- 23 * 24 * It manages to find the drive which is a good start. Writing data during 25 * data phase is known to be broken (due to requirements of two byte writes). 26 * Removing "Phase" debug messages. 27 * 28 * PS: Took four hours of coding after I bought a drive. 29 * ANZAC Day (Aus "War Veterans Holiday") 25Apr98 [ 0.14 ] 30 * 31 * Ten minutes later after a few fixes.... (LITERALLY!!!) 32 * Have mounted disk, copied file, dismounted disk, remount disk, diff file 33 * ----- It actually works!!! ----- 34 * 25Apr98 [ 0.15 ] 35 * 36 * Twenty minutes of mucking around, rearanged the IEEE negotiate mechanism. 37 * Now have byte mode working (only EPP and ECP to go now... :=) 38 * 26Apr98 [ 0.16 ] 39 * 40 * Thirty minutes of further coding results in EPP working on my machine. 41 * 27Apr98 [ 0.17 ] 42 * 43 * Due to work commitments and inability to get a "true" ECP mode functioning 44 * I have decided to code the parport support into imm. 45 * 09Jun98 [ 0.18 ] 46 * 47 * Driver is now out of beta testing. 48 * Support for parport has been added. 49 * Now distributed with the ppa driver. 50 * 12Jun98 [ 2.00 ] 51 * 52 * Err.. It appears that imm-2.00 was broken.... 53 * 18Jun98 [ 2.01 ] 54 * 55 * Patch applied to sync this against the Linux 2.1.x kernel code 56 * Included qboot_zip.sh 57 * 21Jun98 [ 2.02 ] 58 * 59 * Other clean ups include the follow changes: 60 * CONFIG_SCSI_PPA_HAVE_PEDANTIC => CONFIG_SCSI_IZIP_EPP16 61 * added CONFIG_SCSI_IZIP_SLOW_CTR option 62 * [2.03] 63 * Fix kernel panic on scsi timeout. 20Aug00 [2.04] 64 * 65 * Avoid io_request_lock problems. 66 * John Cavan <johncavan@home.com> 16Nov00 [2.05] 67 */ 68 /* ------ END OF USER CONFIGURABLE PARAMETERS ----- */ 69 70 #include <linux/stddef.h> 71 #include <linux/module.h> 72 #include <linux/kernel.h> 73 #include <linux/ioport.h> 74 #include <linux/delay.h> 75 #include <linux/proc_fs.h> 76 #include <linux/stat.h> 77 #include <linux/blkdev.h> 78 #include <linux/sched.h> 79 #include <linux/interrupt.h> 80 81 #include <asm/io.h> 82 #include <scsi/scsi_host.h> 83 /* batteries not included :-) */ 84 85 /* 86 * modes in which the driver can operate 87 */ 88 #define IMM_AUTODETECT 0 /* Autodetect mode */ 89 #define IMM_NIBBLE 1 /* work in standard 4 bit mode */ 90 #define IMM_PS2 2 /* PS/2 byte mode */ 91 #define IMM_EPP_8 3 /* EPP mode, 8 bit */ 92 #define IMM_EPP_16 4 /* EPP mode, 16 bit */ 93 #define IMM_EPP_32 5 /* EPP mode, 32 bit */ 94 #define IMM_UNKNOWN 6 /* Just in case... */ 95 96 static char *IMM_MODE_STRING[] = 97 { 98 [IMM_AUTODETECT] = "Autodetect", 99 [IMM_NIBBLE] = "SPP", 100 [IMM_PS2] = "PS/2", 101 [IMM_EPP_8] = "EPP 8 bit", 102 [IMM_EPP_16] = "EPP 16 bit", 103 #ifdef CONFIG_SCSI_IZIP_EPP16 104 [IMM_EPP_32] = "EPP 16 bit", 105 #else 106 [IMM_EPP_32] = "EPP 32 bit", 107 #endif 108 [IMM_UNKNOWN] = "Unknown", 109 }; 110 111 /* other options */ 112 #define IMM_BURST_SIZE 512 /* data burst size */ 113 #define IMM_SELECT_TMO 500 /* 500 how long to wait for target ? */ 114 #define IMM_SPIN_TMO 5000 /* 50000 imm_wait loop limiter */ 115 #define IMM_DEBUG 0 /* debugging option */ 116 #define IN_EPP_MODE(x) (x == IMM_EPP_8 || x == IMM_EPP_16 || x == IMM_EPP_32) 117 118 /* args to imm_connect */ 119 #define CONNECT_EPP_MAYBE 1 120 #define CONNECT_NORMAL 0 121 122 #define r_dtr(x) (unsigned char)inb((x)) 123 #define r_str(x) (unsigned char)inb((x)+1) 124 #define r_ctr(x) (unsigned char)inb((x)+2) 125 #define r_epp(x) (unsigned char)inb((x)+4) 126 #define r_fifo(x) (unsigned char)inb((x)) /* x must be base_hi */ 127 /* On PCI is: base+0x400 != base_hi */ 128 #define r_ecr(x) (unsigned char)inb((x)+2) /* x must be base_hi */ 129 130 #define w_dtr(x,y) outb(y, (x)) 131 #define w_str(x,y) outb(y, (x)+1) 132 #define w_epp(x,y) outb(y, (x)+4) 133 #define w_fifo(x,y) outb(y, (x)) /* x must be base_hi */ 134 #define w_ecr(x,y) outb(y, (x)+0x2) /* x must be base_hi */ 135 136 #ifdef CONFIG_SCSI_IZIP_SLOW_CTR 137 #define w_ctr(x,y) outb_p(y, (x)+2) 138 #else 139 #define w_ctr(x,y) outb(y, (x)+2) 140 #endif 141 142 static inline struct scsi_pointer *imm_scsi_pointer(struct scsi_cmnd *cmd) 143 { 144 return scsi_cmd_priv(cmd); 145 } 146 147 static int imm_engine(imm_struct *, struct scsi_cmnd *); 148 149 #endif /* _IMM_H */ 150