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-rw-r--r--linux/src/drivers/scsi/ppa.h176
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diff --git a/linux/src/drivers/scsi/ppa.h b/linux/src/drivers/scsi/ppa.h
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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 */