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/* 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.
*/
#include <linux/config.h> /* CONFIG_SCSI_PPA_HAVE_PEDANTIC */
#ifndef _PPA_H
#define _PPA_H
#define PPA_VERSION "1.42"
#if 0
/* Use the following to enable certain chipset support
* Default is PEDANTIC = 3
*/
#ifndef CONFIG_SCSI_PPA_HAVE_PEDANTIC
#define CONFIG_SCSI_PPA_HAVE_PEDANTIC 3
#endif
#endif
/*
* 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 ]
*
* Compiled against 2.1.53.
* Rebuilt ppa_abort() function, should handle unplugged cable.
* [1.35s]
*
* PPA now auto probes for EPP on base address which are aligned on
* 8 byte boundaries (0x278 & 0x378) using the attached devices.
* This hopefully avoids the nasty problem of trying to detect EPP.
* Tested on 2.1.53 [1.36]
*
* The id_probe utility no longer performs read/write tests.
* Additional code included for checking the Intel ECP bug
* (Bit 0 of STR stuck low which fools the EPP detection routine)
* [1.37]
*
* Oops! Got the bit sign mixed up for the Intel bug check.
* Found that an additional delay is required during SCSI resets
* to allow devices to settle down.
* [1.38]
*
* Fixed all problems in the parport sharing scheme. Now ppa can be safe
* used with lp or other parport devices on the same parallel port.
* 1997 by Andrea Arcangeli
* [1.39]
*
* Little fix in ppa engine to ensure that ppa don' t release parport
* or disconnect in wrong cases.
* 1997 by Andrea Arcangeli
* [1.40]
*
* 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]
*/
/* ------ END OF USER CONFIGURABLE PARAMETERS ----- */
#ifdef PPA_CODE
#include <linux/stddef.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/tqueue.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/blk.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <asm/io.h>
#include "sd.h"
#include "hosts.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",
"EPP 32 bit",
"Unknown"};
/* This is a global option */
int ppa_sg = SG_ALL; /* enable/disable scatter-gather. */
/* other options */
#define PPA_CAN_QUEUE 1 /* use "queueing" interface */
#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_DEBUG 0 /* debuging 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)+0x400)
#define r_ecr(x) (unsigned char)inb((x)+0x402)
#define w_dtr(x,y) outb(y, (x))
#define w_str(x,y) outb(y, (x)+1)
#define w_ctr(x,y) outb(y, (x)+2)
#define w_epp(x,y) outb(y, (x)+4)
#define w_fifo(x,y) outb(y, (x)+0x400)
#define w_ecr(x,y) outb(y, (x)+0x402)
static int ppa_engine(ppa_struct *, Scsi_Cmnd *);
static int ppa_in(int, char *, int);
static int ppa_init(int);
static void ppa_interrupt(void *);
static int ppa_out(int, char *, int);
struct proc_dir_entry proc_scsi_ppa =
{PROC_SCSI_PPA, 3, "ppa", S_IFDIR | S_IRUGO | S_IXUGO, 2};
#else
extern struct proc_dir_entry proc_scsi_ppa;
#endif
int ppa_detect(Scsi_Host_Template *);
const char *ppa_info(struct Scsi_Host *);
int ppa_queuecommand(Scsi_Cmnd *, void (*done) (Scsi_Cmnd *));
int ppa_abort(Scsi_Cmnd *);
int ppa_reset(Scsi_Cmnd *, unsigned int);
int ppa_proc_info(char *, char **, off_t, int, int, int);
int ppa_biosparam(Disk *, kdev_t, int *);
#define PPA { proc_dir: &proc_scsi_ppa, \
proc_info: ppa_proc_info, \
name: "Iomega parport ZIP drive", \
detect: ppa_detect, \
queuecommand: ppa_queuecommand, \
abort: ppa_abort, \
reset: ppa_reset, \
bios_param: ppa_biosparam, \
this_id: -1, \
sg_tablesize: SG_ALL, \
cmd_per_lun: 1, \
use_clustering: ENABLE_CLUSTERING \
}
#endif /* _PPA_H */
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