Initial import

1 files changed, 150 insertions, 0 deletions

diff --git a/drivers/scsi/ppa.h b/drivers/scsi/ppa.h
new file mode 100644
index 000000000..ba8021427
--- /dev/null
+++ b/drivers/scsi/ppa.h
@@ -0,0 +1,150 @@
+/*  Driver for the PPA3 parallel port SCSI HBA embedded in 
+ * the Iomega ZIP drive
+ * 
+ * (c) 1996     Grant R. Guenther  grant@torque.net
+ *              David Campbell
+ *
+ *      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/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 */