| /* Driver for the PPA3 parallel port SCSI HBA embedded in |
| * the Iomega ZIP drive |
| * |
| * (c) 1996 Grant R. Guenther grant@torque.net |
| * David Campbell |
| * |
| * All comments to David. |
| */ |
| |
| #ifndef _PPA_H |
| #define _PPA_H |
| |
| #define PPA_VERSION "2.07 (for Linux 2.4.x)" |
| |
| /* |
| * this driver has been hacked by Matteo Frigo (athena@theory.lcs.mit.edu) |
| * to support EPP and scatter-gather. [0.26-athena] |
| * |
| * additional hacks by David Campbell |
| * in response to this driver "mis-behaving" on his machine. |
| * Fixed EPP to handle "software" changing of EPP port data direction. |
| * Chased down EPP timeouts |
| * Made this driver "kernel version friendly" [0.28-athena] |
| * |
| * [ Stuff removed ] |
| * |
| * Corrected ppa.h for 2.1.x kernels (>=2.1.85) |
| * Modified "Nat Semi Kludge" for extended chipsets |
| * [1.41] |
| * |
| * Fixed id_probe for EPP 1.9 chipsets (misdetected as EPP 1.7) |
| * [1.42] |
| * |
| * Development solely for 2.1.x kernels from now on! |
| * [2.00] |
| * |
| * Hack and slash at the init code (EPP device check routine) |
| * Added INSANE option. |
| * [2.01] |
| * |
| * Patch applied to sync against the 2.1.x kernel code |
| * Included qboot_zip.sh |
| * [2.02] |
| * |
| * Cleaned up the mess left by someone else trying to fix the |
| * asm section to keep egcc happy. The asm section no longer |
| * exists, the nibble code is *almost* as fast as the asm code |
| * providing it is compiled with egcc. |
| * |
| * Other clean ups include the follow changes: |
| * CONFIG_SCSI_PPA_HAVE_PEDANTIC => CONFIG_SCSI_IZIP_EPP16 |
| * added CONFIG_SCSI_IZIP_SLOW_CTR option |
| * [2.03] |
| * |
| * Use ppa_wait() to check for ready AND connected status bits |
| * Add ppa_wait() calls to ppa_completion() |
| * by Peter Cherriman <pjc@ecs.soton.ac.uk> and |
| * Tim Waugh <twaugh@redhat.com> |
| * [2.04] |
| * |
| * Fix kernel panic on scsi timeout, 2000-08-18 [2.05] |
| * |
| * Avoid io_request_lock problems. |
| * John Cavan <johncavan@home.com> [2.06] |
| * |
| * Busy wait for connected status bit in ppa_completion() |
| * in order to cope with some hardware that has this bit low |
| * for short periods of time. |
| * Add udelay() to ppa_select() |
| * by Peter Cherriman <pjc@ecs.soton.ac.uk> and |
| * Oleg Makarenko <omakarenko@cyberplat.ru> |
| * [2.07] |
| */ |
| /* ------ END OF USER CONFIGURABLE PARAMETERS ----- */ |
| |
| #include <linux/stddef.h> |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/ioport.h> |
| #include <linux/delay.h> |
| #include <linux/proc_fs.h> |
| #include <linux/stat.h> |
| #include <linux/blkdev.h> |
| #include <linux/sched.h> |
| #include <linux/interrupt.h> |
| |
| #include <asm/io.h> |
| #include <scsi/scsi_host.h> |
| /* batteries not included :-) */ |
| |
| /* |
| * modes in which the driver can operate |
| */ |
| #define PPA_AUTODETECT 0 /* Autodetect mode */ |
| #define PPA_NIBBLE 1 /* work in standard 4 bit mode */ |
| #define PPA_PS2 2 /* PS/2 byte mode */ |
| #define PPA_EPP_8 3 /* EPP mode, 8 bit */ |
| #define PPA_EPP_16 4 /* EPP mode, 16 bit */ |
| #define PPA_EPP_32 5 /* EPP mode, 32 bit */ |
| #define PPA_UNKNOWN 6 /* Just in case... */ |
| |
| static char *PPA_MODE_STRING[] = |
| { |
| "Autodetect", |
| "SPP", |
| "PS/2", |
| "EPP 8 bit", |
| "EPP 16 bit", |
| #ifdef CONFIG_SCSI_IZIP_EPP16 |
| "EPP 16 bit", |
| #else |
| "EPP 32 bit", |
| #endif |
| "Unknown"}; |
| |
| /* other options */ |
| #define PPA_BURST_SIZE 512 /* data burst size */ |
| #define PPA_SELECT_TMO 5000 /* how long to wait for target ? */ |
| #define PPA_SPIN_TMO 50000 /* ppa_wait loop limiter */ |
| #define PPA_RECON_TMO 500 /* scsi reconnection loop limiter */ |
| #define PPA_DEBUG 0 /* debugging option */ |
| #define IN_EPP_MODE(x) (x == PPA_EPP_8 || x == PPA_EPP_16 || x == PPA_EPP_32) |
| |
| /* args to ppa_connect */ |
| #define CONNECT_EPP_MAYBE 1 |
| #define CONNECT_NORMAL 0 |
| |
| #define r_dtr(x) (unsigned char)inb((x)) |
| #define r_str(x) (unsigned char)inb((x)+1) |
| #define r_ctr(x) (unsigned char)inb((x)+2) |
| #define r_epp(x) (unsigned char)inb((x)+4) |
| #define r_fifo(x) (unsigned char)inb((x)) /* x must be base_hi */ |
| /* On PCI is base+0x400 != base_hi */ |
| #define r_ecr(x) (unsigned char)inb((x)+0x2) /* x must be base_hi */ |
| |
| #define w_dtr(x,y) outb(y, (x)) |
| #define w_str(x,y) outb(y, (x)+1) |
| #define w_epp(x,y) outb(y, (x)+4) |
| #define w_fifo(x,y) outb(y, (x)) /* x must be base_hi */ |
| #define w_ecr(x,y) outb(y, (x)+0x2)/* x must be base_hi */ |
| |
| #ifdef CONFIG_SCSI_IZIP_SLOW_CTR |
| #define w_ctr(x,y) outb_p(y, (x)+2) |
| #else |
| #define w_ctr(x,y) outb(y, (x)+2) |
| #endif |
| |
| static int ppa_engine(ppa_struct *, struct scsi_cmnd *); |
| |
| #endif /* _PPA_H */ |
