patch-2.1.64 linux/drivers/scsi/ppa.h

• Lines: 188
• Date: Fri Nov 14 18:41:30 1997
• Orig file: v2.1.63/linux/drivers/scsi/ppa.h
• Orig date: Mon Nov 3 13:04:26 1997

diff -u --recursive --new-file v2.1.63/linux/drivers/scsi/ppa.h linux/drivers/scsi/ppa.h
@@ -2,30 +2,62 @@
  * 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   "Curtin 1-08-BETA"
-
-/* This driver reqires a 1.3.37 kernel or higher!! */
+#define   PPA_VERSION   "1.39"
 
 /* Use the following to enable certain chipset support
  * Default is PEDANTIC = 3
  */
-
-#include <linux/config.h>
-
 #ifndef CONFIG_SCSI_PPA_HAVE_PEDANTIC
 #define CONFIG_SCSI_PPA_HAVE_PEDANTIC	3
 #endif
-#ifndef CONFIG_SCSI_PPA_EPP_TIME
-#define CONFIG_SCSI_PPA_EPP_TIME	64
-#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 <arcangeli@mbox.queen.it>
+ *							[1.39]
+ */
 /* ------ END OF USER CONFIGURABLE PARAMETERS ----- */
 
+#ifdef PPA_CODE
 #include  <linux/stddef.h>
 #include  <linux/module.h>
 #include  <linux/kernel.h>
@@ -35,14 +67,76 @@
 #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"
-#include  <linux/parport.h>
 /* batteries not included :-) */
 
-#define	PPA_INITIATOR	7
+/*
+ * 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   0	/* 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;
+#define ppa_release 0
+#endif
 
 int ppa_detect(Scsi_Host_Template *);
 const char *ppa_info(struct Scsi_Host *);
@@ -51,25 +145,13 @@
 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*);
-int ppa_release(struct Scsi_Host *);
-
-#ifndef	MODULE
-#ifdef	PPA_CODE
-#define SKIP_PROC_DIR
-#endif
-#endif
-
-#ifndef SKIP_PROC_DIR
-struct proc_dir_entry proc_scsi_ppa =
-{PROC_SCSI_PPA, 3, "ppa", S_IFDIR | S_IRUGO | S_IXUGO, 2};
-#endif /* !PPA_CODE => hosts.c */
+int ppa_biosparam(Disk *, kdev_t, int *);
 
 #define PPA {	/* next */	 	0, \
 		/* usage_count */	0, \
 		/* proc_dir */		&proc_scsi_ppa, \
 		/* proc_info */		ppa_proc_info, \
-		/* name */		"Iomega ZIP/JAZ Traveller", \
+		/* name */		"Iomega parport ZIP drive", \
 		/* detect */		ppa_detect, \
 		/* release */		ppa_release, \
 		/* info */		0, \
@@ -80,7 +162,7 @@
 		/* slave_attach */	0, \
 		/* bios_param */	ppa_biosparam, \
 		/* can_queue */		0, \
-		/* this_id */		PPA_INITIATOR, \
+		/* this_id */		-1, \
 		/* sg_tablesize */	SG_ALL, \
 		/* cmd_per_lun */	1, \
 		/* present */		0, \