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Diffstat (limited to 'drivers/scsi/ppa.h')
| -rw-r--r-- | drivers/scsi/ppa.h | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/drivers/scsi/ppa.h b/drivers/scsi/ppa.h new file mode 100644 index 000000000000..f6e1a1574bb8 --- /dev/null +++ b/drivers/scsi/ppa.h @@ -0,0 +1,151 @@ +/* Driver for the PPA3 parallel port SCSI HBA embedded in + * the Iomega ZIP drive + * + * (c) 1996 Grant R. Guenther grant@torque.net + * David Campbell campbell@torque.net + * + * 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/config.h> +#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 */ |