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 campbell@torque.net 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 #ifdef PPA_CODE 77 #include <linux/config.h> 78 #include <linux/stddef.h> 79 #include <linux/module.h> 80 #include <linux/kernel.h> 81 #include <linux/tqueue.h> 82 #include <linux/ioport.h> 83 #include <linux/delay.h> 84 #include <linux/proc_fs.h> 85 #include <linux/stat.h> 86 #include <linux/blk.h> 87 #include <linux/sched.h> 88 #include <linux/interrupt.h> 89 90 #include <asm/io.h> 91 #include "sd.h" 92 #include "hosts.h" 93 /* batteries not included :-) */ 94 95 /* 96 * modes in which the driver can operate 97 */ 98 #define PPA_AUTODETECT 0 /* Autodetect mode */ 99 #define PPA_NIBBLE 1 /* work in standard 4 bit mode */ 100 #define PPA_PS2 2 /* PS/2 byte mode */ 101 #define PPA_EPP_8 3 /* EPP mode, 8 bit */ 102 #define PPA_EPP_16 4 /* EPP mode, 16 bit */ 103 #define PPA_EPP_32 5 /* EPP mode, 32 bit */ 104 #define PPA_UNKNOWN 6 /* Just in case... */ 105 106 static char *PPA_MODE_STRING[] = 107 { 108 "Autodetect", 109 "SPP", 110 "PS/2", 111 "EPP 8 bit", 112 "EPP 16 bit", 113 #ifdef CONFIG_SCSI_IZIP_EPP16 114 "EPP 16 bit", 115 #else 116 "EPP 32 bit", 117 #endif 118 "Unknown"}; 119 120 /* This is a global option */ 121 int ppa_sg = SG_ALL; /* enable/disable scatter-gather. */ 122 123 /* other options */ 124 #define PPA_CAN_QUEUE 1 /* use "queueing" interface */ 125 #define PPA_BURST_SIZE 512 /* data burst size */ 126 #define PPA_SELECT_TMO 5000 /* how long to wait for target ? */ 127 #define PPA_SPIN_TMO 50000 /* ppa_wait loop limiter */ 128 #define PPA_RECON_TMO 500 /* scsi reconnection loop limiter */ 129 #define PPA_DEBUG 0 /* debugging option */ 130 #define IN_EPP_MODE(x) (x == PPA_EPP_8 || x == PPA_EPP_16 || x == PPA_EPP_32) 131 132 /* args to ppa_connect */ 133 #define CONNECT_EPP_MAYBE 1 134 #define CONNECT_NORMAL 0 135 136 #define r_dtr(x) (unsigned char)inb((x)) 137 #define r_str(x) (unsigned char)inb((x)+1) 138 #define r_ctr(x) (unsigned char)inb((x)+2) 139 #define r_epp(x) (unsigned char)inb((x)+4) 140 #define r_fifo(x) (unsigned char)inb((x)) /* x must be base_hi */ 141 /* On PCI is base+0x400 != base_hi */ 142 #define r_ecr(x) (unsigned char)inb((x)+0x2) /* x must be base_hi */ 143 144 #define w_dtr(x,y) outb(y, (x)) 145 #define w_str(x,y) outb(y, (x)+1) 146 #define w_epp(x,y) outb(y, (x)+4) 147 #define w_fifo(x,y) outb(y, (x)) /* x must be base_hi */ 148 #define w_ecr(x,y) outb(y, (x)+0x2)/* x must be base_hi */ 149 150 #ifdef CONFIG_SCSI_IZIP_SLOW_CTR 151 #define w_ctr(x,y) outb_p(y, (x)+2) 152 #else 153 #define w_ctr(x,y) outb(y, (x)+2) 154 #endif 155 156 static int ppa_engine(ppa_struct *, Scsi_Cmnd *); 157 static int ppa_in(int, char *, int); 158 static int ppa_init(int); 159 static void ppa_interrupt(void *); 160 static int ppa_out(int, char *, int); 161 162 #else 163 #define ppa_release 0 164 #endif 165 166 int ppa_detect(Scsi_Host_Template *); 167 const char *ppa_info(struct Scsi_Host *); 168 int ppa_command(Scsi_Cmnd *); 169 int ppa_queuecommand(Scsi_Cmnd *, void (*done) (Scsi_Cmnd *)); 170 int ppa_abort(Scsi_Cmnd *); 171 int ppa_reset(Scsi_Cmnd *); 172 int ppa_proc_info(char *, char **, off_t, int, int, int); 173 int ppa_biosparam(Disk *, kdev_t, int *); 174 175 #define PPA { proc_name: "ppa", \ 176 proc_info: ppa_proc_info, \ 177 name: "Iomega VPI0 (ppa) interface",\ 178 detect: ppa_detect, \ 179 release: ppa_release, \ 180 command: ppa_command, \ 181 queuecommand: ppa_queuecommand, \ 182 eh_abort_handler: ppa_abort, \ 183 eh_device_reset_handler: NULL, \ 184 eh_bus_reset_handler: ppa_reset, \ 185 eh_host_reset_handler: ppa_reset, \ 186 use_new_eh_code: 1, \ 187 bios_param: ppa_biosparam, \ 188 this_id: -1, \ 189 sg_tablesize: SG_ALL, \ 190 cmd_per_lun: 1, \ 191 use_clustering: ENABLE_CLUSTERING \ 192 } 193 #endif /* _PPA_H */ 194