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151 lines
5.0 KiB
151 lines
5.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* Driver for the PPA3 parallel port SCSI HBA embedded in |
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* the Iomega ZIP drive |
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* |
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* (c) 1996 Grant R. Guenther [email protected] |
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* David Campbell |
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* |
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* All comments to David. |
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*/ |
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#ifndef _PPA_H |
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#define _PPA_H |
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#define PPA_VERSION "2.07 (for Linux 2.4.x)" |
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/* |
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* this driver has been hacked by Matteo Frigo ([email protected]) |
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* to support EPP and scatter-gather. [0.26-athena] |
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* |
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* additional hacks by David Campbell |
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* in response to this driver "mis-behaving" on his machine. |
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* Fixed EPP to handle "software" changing of EPP port data direction. |
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* Chased down EPP timeouts |
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* Made this driver "kernel version friendly" [0.28-athena] |
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* |
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* [ Stuff removed ] |
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* |
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* Corrected ppa.h for 2.1.x kernels (>=2.1.85) |
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* Modified "Nat Semi Kludge" for extended chipsets |
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* [1.41] |
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* |
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* Fixed id_probe for EPP 1.9 chipsets (misdetected as EPP 1.7) |
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* [1.42] |
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* |
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* Development solely for 2.1.x kernels from now on! |
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* [2.00] |
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* |
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* Hack and slash at the init code (EPP device check routine) |
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* Added INSANE option. |
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* [2.01] |
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* |
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* Patch applied to sync against the 2.1.x kernel code |
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* Included qboot_zip.sh |
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* [2.02] |
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* |
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* Cleaned up the mess left by someone else trying to fix the |
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* asm section to keep egcc happy. The asm section no longer |
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* exists, the nibble code is *almost* as fast as the asm code |
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* providing it is compiled with egcc. |
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* |
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* Other clean ups include the follow changes: |
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* CONFIG_SCSI_PPA_HAVE_PEDANTIC => CONFIG_SCSI_IZIP_EPP16 |
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* added CONFIG_SCSI_IZIP_SLOW_CTR option |
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* [2.03] |
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* |
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* Use ppa_wait() to check for ready AND connected status bits |
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* Add ppa_wait() calls to ppa_completion() |
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* by Peter Cherriman <[email protected]> and |
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* Tim Waugh <[email protected]> |
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* [2.04] |
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* |
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* Fix kernel panic on scsi timeout, 2000-08-18 [2.05] |
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* |
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* Avoid io_request_lock problems. |
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* John Cavan <[email protected]> [2.06] |
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* |
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* Busy wait for connected status bit in ppa_completion() |
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* in order to cope with some hardware that has this bit low |
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* for short periods of time. |
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* Add udelay() to ppa_select() |
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* by Peter Cherriman <[email protected]> and |
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* Oleg Makarenko <[email protected]> |
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* [2.07] |
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*/ |
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/* ------ END OF USER CONFIGURABLE PARAMETERS ----- */ |
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#include <linux/stddef.h> |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/ioport.h> |
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#include <linux/delay.h> |
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#include <linux/proc_fs.h> |
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#include <linux/stat.h> |
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#include <linux/blkdev.h> |
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#include <linux/sched.h> |
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#include <linux/interrupt.h> |
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#include <asm/io.h> |
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#include <scsi/scsi_host.h> |
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/* batteries not included :-) */ |
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/* |
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* modes in which the driver can operate |
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*/ |
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#define PPA_AUTODETECT 0 /* Autodetect mode */ |
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#define PPA_NIBBLE 1 /* work in standard 4 bit mode */ |
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#define PPA_PS2 2 /* PS/2 byte mode */ |
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#define PPA_EPP_8 3 /* EPP mode, 8 bit */ |
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#define PPA_EPP_16 4 /* EPP mode, 16 bit */ |
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#define PPA_EPP_32 5 /* EPP mode, 32 bit */ |
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#define PPA_UNKNOWN 6 /* Just in case... */ |
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static char *PPA_MODE_STRING[] = |
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{ |
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"Autodetect", |
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"SPP", |
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"PS/2", |
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"EPP 8 bit", |
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"EPP 16 bit", |
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#ifdef CONFIG_SCSI_IZIP_EPP16 |
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"EPP 16 bit", |
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#else |
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"EPP 32 bit", |
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#endif |
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"Unknown"}; |
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/* other options */ |
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#define PPA_BURST_SIZE 512 /* data burst size */ |
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#define PPA_SELECT_TMO 5000 /* how long to wait for target ? */ |
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#define PPA_SPIN_TMO 50000 /* ppa_wait loop limiter */ |
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#define PPA_RECON_TMO 500 /* scsi reconnection loop limiter */ |
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#define PPA_DEBUG 0 /* debugging option */ |
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#define IN_EPP_MODE(x) (x == PPA_EPP_8 || x == PPA_EPP_16 || x == PPA_EPP_32) |
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/* args to ppa_connect */ |
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#define CONNECT_EPP_MAYBE 1 |
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#define CONNECT_NORMAL 0 |
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#define r_dtr(x) (unsigned char)inb((x)) |
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#define r_str(x) (unsigned char)inb((x)+1) |
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#define r_ctr(x) (unsigned char)inb((x)+2) |
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#define r_epp(x) (unsigned char)inb((x)+4) |
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#define r_fifo(x) (unsigned char)inb((x)) /* x must be base_hi */ |
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/* On PCI is base+0x400 != base_hi */ |
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#define r_ecr(x) (unsigned char)inb((x)+0x2) /* x must be base_hi */ |
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#define w_dtr(x,y) outb(y, (x)) |
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#define w_str(x,y) outb(y, (x)+1) |
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#define w_epp(x,y) outb(y, (x)+4) |
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#define w_fifo(x,y) outb(y, (x)) /* x must be base_hi */ |
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#define w_ecr(x,y) outb(y, (x)+0x2)/* x must be base_hi */ |
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#ifdef CONFIG_SCSI_IZIP_SLOW_CTR |
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#define w_ctr(x,y) outb_p(y, (x)+2) |
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#else |
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#define w_ctr(x,y) outb(y, (x)+2) |
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#endif |
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static int ppa_engine(ppa_struct *, struct scsi_cmnd *); |
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#endif /* _PPA_H */
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