patch-1.3.97 linux/drivers/scsi/in2000.c
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- Lines: 3035
- Date:
Sun Apr 28 12:13:45 1996
- Orig file:
v1.3.96/linux/drivers/scsi/in2000.c
- Orig date:
Fri Mar 1 07:50:52 1996
diff -u --recursive --new-file v1.3.96/linux/drivers/scsi/in2000.c linux/drivers/scsi/in2000.c
@@ -1,731 +1,2375 @@
/*
- * This file is in2000.c, written and
- * Copyright (C) 1993 Brad McLean
- * Last edit 1/19/95 TZ
- * Disclaimer:
- * Note: This is ugly. I know it, I wrote it, but my whole
- * focus was on getting the damn thing up and out quickly.
- * Future stuff that would be nice: Command chaining, and
- * a local queue of commands would speed stuff up considerably.
- * Disconnection needs some supporting code. All of this
- * is beyond the scope of what I wanted to address, but if you
- * have time and patience, more power to you.
- * Also, there are some constants scattered throughout that
- * should have defines, and I should have built functions to
- * address the registers on the WD chip.
- * Oh well, I'm out of time for this project.
- * The one good thing to be said is that you can use the card.
- */
-
-/*
- * This module was updated by Shaun Savage first on 5-13-93
- * At that time the write was fixed, irq detection, and some
- * timing stuff. since that time other problems were fixed.
- * On 7-20-93 this file was updated for patch level 11
- * There are still problems with it but it work on 95% of
- * the machines. There are still problems with it working with
- * IDE drives, as swap drive and HD that support reselection.
- * But for most people it will work.
- */
-/* More changes by Bill Earnest, wde@aluxpo.att.com
- * through 4/07/94. Includes rewrites of FIFO routines,
- * length-limited commands to make swap partitions work.
- * Merged the changes released by Larry Doolittle, based on input
- * from Jon Luckey, Roger Sunshine, John Shifflett. The FAST_FIFO
- * doesn't work for me. Scatter-gather code from Eric. The change to
- * an IF stmt. in the interrupt routine finally made it stable.
- * Limiting swap request size patch to ll_rw_blk.c not needed now.
- * Please ignore the clutter of debug stmts., pretty can come later.
- */
-/* Merged code from Matt Postiff improving the auto-sense validation
- * for all I/O addresses. Some reports of problems still come in, but
- * have been unable to reproduce or localize the cause. Some are from
- * LUN > 0 problems, but that is not host specific. Now 6/6/94.
- */
-/* Changes for 1.1.28 kernel made 7/19/94, code not affected. (WDE)
- */
-/* Changes for 1.1.43+ kernels made 8/25/94, code added to check for
- * new BIOS version, derived by jshiffle@netcom.com. (WDE)
+ * in2000.c - Linux device driver for the
+ * Always IN2000 ISA SCSI card.
+ *
+ * Copyright (c) 1996 John Shifflett, GeoLog Consulting
+ * john@geolog.com
+ * jshiffle@netcom.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ *
+ * Drew Eckhardt's excellent 'Generic NCR5380' sources provided
+ * much of the inspiration and some of the code for this driver.
+ * The Linux IN2000 driver distributed in the Linux kernels through
+ * version 1.2.13 was an extremely valuable reference on the arcane
+ * (and still mysterious) workings of the IN2000's fifo. It also
+ * is where I lifted in2000_biosparam(), the gist of the card
+ * detection scheme, and other bits of code. Many thanks to the
+ * talented and courageous people who wrote, contributed to, and
+ * maintained that driver (including Brad McLean, Shaun Savage,
+ * Bill Earnest, Larry Doolittle, Roger Sunshine, John Luckey,
+ * Matt Postiff, Peter Lu, zerucha@shell.portal.com, and Eric
+ * Youngdale). I should also mention the driver written by
+ * Hamish Mcdonald for the (GASP!) Amiga A2091 card, included
+ * in the Linux-m68k distribution; it gave me a good initial
+ * understandng of the proper way to run a WD33c93 chip, and I
+ * ended up stealing lots of code from it.
+ *
+ * _This_ driver is (I feel) an improvement over the old one in
+ * several respects:
+ * - All problems relating to the data size of a SCSI request are
+ * gone (as far as I know). The old driver couldn't handle
+ * swapping to partitions because that involved 4k blocks, nor
+ * could it deal with the st.c tape driver unmodified, because
+ * that usually involved 4k - 32k blocks. The old driver never
+ * quite got away from a morbid dependence on 2k block sizes -
+ * which of course is the size of the card's fifo.
+ *
+ * - Target Disconnection/Reconnection is now supported. Any
+ * system with more than one device active on the SCSI bus
+ * will benefit from this. The driver defaults to what I'm
+ * calling 'adaptive disconnect' - meaning that each command
+ * is evaluated individually as to whether or not it should
+ * be run with the option to disconnect/reselect (if the
+ * device chooses), or as a "SCSI-bus-hog".
+ *
+ * - Synchronous data transfers are now supported. Because there
+ * are a few devices (and many improperly terminated systems)
+ * that choke when doing sync, the default is sync DISABLED
+ * for all devices. This faster protocol can (and should!)
+ * be enabled on selected devices via the command-line.
+ *
+ * - Runtime operating parameters can now be specified through
+ * either the LILO or the 'insmod' command line. For LILO do:
+ * "in2000=blah,blah,blah"
+ * and with insmod go like:
+ * "insmod /usr/src/linux/modules/in2000.o setup_strings=blah,blah"
+ * The defaults should be good for most people. See the comment
+ * for 'setup_strings' below for more details.
+ *
+ * - The old driver relied exclusively on what the Western Digital
+ * docs call "Combination Level 2 Commands", which are a great
+ * idea in that the CPU is relieved of a lot of interrupt
+ * overhead. However, by accepting a certain (user-settable)
+ * amount of additional interrupts, this driver achieves
+ * better control over the SCSI bus, and data transfers are
+ * almost as fast while being much easier to define, track,
+ * and debug.
+ *
+ * - You can force detection of a card whose BIOS has been disabled.
*
- * 1/7/95 Fix from Peter Lu (swift@world.std.com) for datalen vs. dataptr
- * logic, much more stable under load.
+ * - Multiple IN2000 cards might almost be supported. I've tried to
+ * keep it in mind, but have no way to test...
+ *
+ *
+ * TODO:
+ * proc interface. tagged queuing. multiple cards.
+ *
+ *
+ * NOTE:
+ * When using this or any other SCSI driver as a module, you'll
+ * find that with the stock kernel, at most _two_ SCSI hard
+ * drives will be linked into the device list (ie, usable).
+ * If your IN2000 card has more than 2 disks on its bus, you
+ * might want to change the define of 'SD_EXTRA_DEVS' in the
+ * 'hosts.h' file from 2 to whatever is appropriate. It took
+ * me a while to track down this surprisingly obscure and
+ * undocumented little "feature".
+ *
+ *
+ * People with bug reports, wish-lists, complaints, comments,
+ * or improvements are asked to pah-leeez email me (John Shifflett)
+ * at john@geolog.com or jshiffle@netcom.com! I'm anxious to get
+ * this thing into as good a shape as possible, and I'm positive
+ * there are lots of lurking bugs and "Stupid Places".
*
- * 1/19/95 (zerucha@shell.portal.com) Added module and biosparam support for
- * larger SCSI hard drives (untested).
*/
-#ifdef MODULE
-#include <linux/module.h>
-#endif
-#include <linux/kernel.h>
-#include <linux/head.h>
-#include <linux/types.h>
-#include <linux/string.h>
+
+#include <asm/system.h>
#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/delay.h>
#include <linux/proc_fs.h>
-#include <asm/dma.h>
-#include <asm/system.h>
#include <asm/io.h>
-#include <linux/blk.h>
+#include <linux/ioport.h>
+#include <linux/blkdev.h>
+
#include "scsi.h"
-#include "hosts.h"
#include "sd.h"
-
+#include "hosts.h"
#include "in2000.h"
-#include<linux/stat.h>
-struct proc_dir_entry proc_scsi_in2000 = {
- PROC_SCSI_IN2000, 6, "in2000",
- S_IFDIR | S_IRUGO | S_IXUGO, 2
-};
+#if LINUX_VERSION_CODE >= 0x010300
+#include <linux/blk.h>
+#else
+#include "../block/blk.h"
+#endif
+
+#ifdef MODULE
+#include <linux/module.h>
+#endif
+
+
+#define PROC_INTERFACE /* add code for /proc/scsi/in2000/xxx interface */
+
+#define FAST_READ_IO /* No problems with these on my machine */
+#define FAST_WRITE_IO
-/*#define FAST_FIFO_IO*/
+#define SYNC_DEBUG /* extra info on sync negotiation printed */
+#define DEBUGGING_ON /* enable command-line debugging bitmask */
+#define DEBUG_DEFAULTS 0 /* default bitmask - change from command-line */
-/*#define DEBUG*/
-#ifdef DEBUG
-#define DEB(x) x
+#define IN2000_VERSION "1.28"
+#define IN2000_DATE "27/Apr/1996"
+
+#ifdef DEBUGGING_ON
+#define DB(f,a) if (hostdata->args & (f)) a;
+#define CHECK_NULL(p,s) if (!(p)) {printk("\n"); while (1) printk("NP:%s\r",(s));}
#else
-#define DEB(x)
+#define DB(f,a)
+#define CHECK_NULL(p,s)
+#endif
+
+#define IS_DIR_OUT(cmd) ((cmd)->cmnd[0] == WRITE_6 || \
+ (cmd)->cmnd[0] == WRITE_10 || \
+ (cmd)->cmnd[0] == WRITE_12)
+
+
+/*
+ * setup_strings is an array of strings that define some of the operating
+ * parameters and settings for this driver. It is used unless a LILO
+ * or insmod command line has been specified, in which case those settings
+ * are combined with the ones here. The driver recognizes the following
+ * keywords (lower case required) and arguments:
+ *
+ * - ioport:addr -Where addr is IO address of a (usually ROM-less) card.
+ * - noreset -No optional args. Prevents SCSI bus reset at boot time.
+ * - nosync:x -x is a bitmask where the 1st 7 bits correspond with
+ * the 7 possible SCSI devices (bit 0 for device #0, etc).
+ * Set a bit to PREVENT sync negotiation on that device.
+ * The driver default is sync DISABLED on all devices.
+ * - period:ns -ns is the minimum # of nanoseconds in a SCSI data transfer
+ * period. Default is 500; acceptable values are 250 - 1000.
+ * - disconnect:x -x = 0 to never allow disconnects, 2 to always allow them.
+ * x = 1 does 'adaptive' disconnects, which is the default
+ * and generally the best choice.
+ * - debug:x -If 'DEBUGGING_ON' is defined, x is a bitmask that causes
+ * various types of debug output to printed - see the DB_xxx
+ * defines in in2000.h
+ * - proc:x -If 'PROC_INTERFACE' is defined, x is a bitmask that
+ * determines how the /proc interface works and what it
+ * does - see the PR_xxx defines in in2000.h
+ *
+ * Syntax Notes:
+ * - Numeric arguments can be decimal or the '0x' form of hex notation. There
+ * _must_ be a colon between a keyword and its numeric argument, with no
+ * spaces.
+ * - Keywords are separated by commas, no spaces, in the standard kernel
+ * command-line manner, except in the case of 'setup_strings[]' (see
+ * below), which is simply a C array of pointers to char. Each element
+ * in the array is a string comprising one keyword & argument.
+ * - A keyword in the 'nth' comma-separated command-line member will overwrite
+ * the 'nth' element of setup_strings[]. A blank command-line member (in
+ * other words, a comma with no preceding keyword) will _not_ overwrite
+ * the corresponding setup_strings[] element.
+ *
+ * A few LILO examples (for insmod, use 'setup_strings' instead of 'in2000'):
+ * - in2000=ioport:0x220,noreset
+ * - in2000=period:250,disconnect:2,nosync:0x03
+ * - in2000=debug:0x1e
+ * - in2000=proc:3
+ */
+
+static char *setup_strings[] =
+ {"","","","","","","","","","","",""};
+
+static struct Scsi_Host *instance_list = 0;
+
+#ifdef PROC_INTERFACE
+unsigned long disc_allowed_total;
+unsigned long disc_taken_total;
#endif
-/* These functions are based on include/asm/io.h */
-#ifndef inw
-inline static unsigned short inw( unsigned short port )
+
+#define read1_io(a) (inb(hostdata->io_base+(a)))
+#define read2_io(a) (inw(hostdata->io_base+(a)))
+#define write1_io(b,a) (outb((b),hostdata->io_base+(a)))
+#define write2_io(w,a) (outw((w),hostdata->io_base+(a)))
+
+/* These inline assembly defines are derived from a patch
+ * sent to me by Bill Earnest. He's done a lot of very
+ * valuable thinking, testing, and coding during his effort
+ * to squeeze more speed out of this driver. I really think
+ * that we are doing IO at close to the maximum now with
+ * the fifo. (And yes, insw uses 'edi' while outsw uses
+ * 'esi'. Thanks Bill!)
+ */
+
+#define FAST_READ2_IO() \
+ __asm__ __volatile__ ("\n \
+ cld \n \
+ orl %%ecx, %%ecx \n \
+ jz 1f \n \
+ rep \n \
+ insw %%dx \n \
+1: " \
+ : "=D" (sp) /* output */ \
+ : "d" (f), "D" (sp), "c" (i) /* input */ \
+ : "edx", "ecx", "edi" ) /* trashed */
+
+#define FAST_WRITE2_IO() \
+ __asm__ __volatile__ ("\n \
+ cld \n \
+ orl %%ecx, %%ecx \n \
+ jz 1f \n \
+ rep \n \
+ outsw %%dx \n \
+1: " \
+ : "=S" (sp) /* output */ \
+ : "d" (f), "S" (sp), "c" (i) /* input */ \
+ : "edx", "ecx", "esi" ) /* trashed */
+
+
+inline uchar read_3393(struct IN2000_hostdata *hostdata, uchar reg_num)
{
- unsigned short _v;
-
- __asm__ volatile ("inw %1,%0"
- :"=a" (_v):"d" ((unsigned short) port));
- return _v;
+ write1_io(reg_num,IO_WD_ADDR);
+ return read1_io(IO_WD_DATA);
}
-#endif
-#ifndef outw
-inline static void outw( unsigned short value, unsigned short port )
-{
- __asm__ volatile ("outw %0,%1"
- : /* no outputs */
- :"a" ((unsigned short) value),
- "d" ((unsigned short) port));
+
+#define READ_AUX_STAT() read1_io(IO_WD_ASR)
+
+
+inline void write_3393(struct IN2000_hostdata *hostdata, uchar reg_num, uchar value)
+{
+ write1_io(reg_num,IO_WD_ADDR);
+ write1_io(value,IO_WD_DATA);
}
-#endif
-/* These functions are lifted from drivers/block/hd.c */
-
-#define port_read(port,buf,nr) \
-__asm__("cld;rep;insw": :"d" (port),"D" (buf),"c" (nr):"cx","di")
-
-#define port_write(port,buf,nr) \
-__asm__("cld;rep;outsw": :"d" (port),"S" (buf),"c" (nr):"cx","si")
-
-static unsigned int base;
-static unsigned int ficmsk;
-static unsigned char irq_level;
-static int in2000_datalen;
-static unsigned int in2000_nsegment;
-static unsigned int in2000_current_segment;
-static unsigned short *in2000_dataptr;
-static char in2000_datawrite;
-static struct scatterlist * in2000_scatter;
-static Scsi_Cmnd *in2000_SCptr = 0;
-
-static void (*in2000_done)(Scsi_Cmnd *);
-
-static int in2000_test_port(int index)
-{
- static const int *bios_tab[] = {
- (int *) 0xc8000, (int *) 0xd0000, (int *) 0xd8000 };
- int i;
- char tmp;
-
- tmp = inb(INFLED);
- /* First, see if the DIP switch values are valid */
- /* The test of B7 may fail on some early boards, mine works. */
- if ( ((~tmp & 0x3) != index ) || (tmp & 0x80) || !(tmp & 0x4) )
- return 0;
- printk("IN-2000 probe got dip setting of %02X\n", tmp);
- tmp = inb(INVERS);
-/* Add some extra sanity checks here */
- for(i=0; i < 3; i++)
- if(*(bios_tab[i]+0x04) == 0x41564f4e ||
- *(bios_tab[i]+0xc) == 0x61776c41) {
- printk("IN-2000 probe found hdw. vers. %02x, BIOS at %06x\n",
- tmp, (unsigned int)bios_tab[i]);
- return 1;
- }
- printk("in2000 BIOS not found.\n");
- return 0;
+
+inline void write_3393_cmd(struct IN2000_hostdata *hostdata, uchar cmd)
+{
+/* while (READ_AUX_STAT() & ASR_CIP)
+ printk("|");*/
+ write1_io(WD_COMMAND,IO_WD_ADDR);
+ write1_io(cmd,IO_WD_DATA);
}
-/*
- * retrieve the current transaction counter from the WD
- */
+uchar read_1_byte(struct IN2000_hostdata *hostdata)
+{
+uchar asr, x = 0;
+
+ write_3393(hostdata,WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
+ write_3393_cmd(hostdata,WD_CMD_TRANS_INFO|0x80);
+ do {
+ asr = READ_AUX_STAT();
+ if (asr & ASR_DBR)
+ x = read_3393(hostdata,WD_DATA);
+ } while (!(asr & ASR_INT));
+ return x;
+}
-static unsigned in2000_txcnt(void)
+
+void write_3393_count(struct IN2000_hostdata *hostdata, unsigned long value)
{
- unsigned total=0;
+ write1_io(WD_TRANSFER_COUNT_MSB,IO_WD_ADDR);
+ write1_io((value >> 16),IO_WD_DATA);
+ write1_io((value >> 8),IO_WD_DATA);
+ write1_io(value,IO_WD_DATA);
+}
+
+
+unsigned long read_3393_count(struct IN2000_hostdata *hostdata)
+{
+unsigned long value;
+
+ write1_io(WD_TRANSFER_COUNT_MSB,IO_WD_ADDR);
+ value = read1_io(IO_WD_DATA) << 16;
+ value |= read1_io(IO_WD_DATA) << 8;
+ value |= read1_io(IO_WD_DATA);
+ return value;
+}
+
+
+
+static struct sx_period sx_table[] = {
+ { 1, 0x20},
+ {252, 0x20},
+ {376, 0x30},
+ {500, 0x40},
+ {624, 0x50},
+ {752, 0x60},
+ {876, 0x70},
+ {1000,0x00},
+ {0, 0} };
+
+int round_period(unsigned int period)
+{
+int x;
+
+ for (x=1; sx_table[x].period_ns; x++) {
+ if ((period <= sx_table[x-0].period_ns) &&
+ (period > sx_table[x-1].period_ns)) {
+ return x;
+ }
+ }
+ return 7;
+}
+
+uchar calc_sync_xfer(unsigned int period, unsigned int offset)
+{
+uchar result;
+
+ period *= 4; /* convert SDTR code to ns */
+ result = sx_table[round_period(period)].reg_value;
+ result |= (offset < OPTIMUM_SX_OFF)?offset:OPTIMUM_SX_OFF;
+ return result;
+}
+
+
+
+void in2000_execute(struct Scsi_Host *instance);
+
+int in2000_queuecommand (Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *))
+{
+struct IN2000_hostdata *hostdata;
+Scsi_Cmnd *tmp;
+unsigned long flags;
+
+
+ hostdata = (struct IN2000_hostdata *)cmd->host->hostdata;
+
+DB(DB_QUEUE_COMMAND,printk("Q-%d-%02x-%ld(",cmd->target,cmd->cmnd[0],cmd->pid))
+
+/* Set up a few fields in the Scsi_Cmnd structure for our own use:
+ * - host_scribble is the pointer to the next cmd in the input queue
+ * - scsi_done points to the routine we call when a cmd is finished
+ * - result is what you'd expect
+ */
+
+ cmd->host_scribble = NULL;
+ cmd->scsi_done = done;
+ cmd->result = 0;
+
+/* We use the Scsi_Pointer structure that's included with each command
+ * as a scratchpad (as it's intended to be used!). The handy thing about
+ * the SCp.xxx fields is that they're always associated with a given
+ * cmd, and are preserved across disconnect-reconnect. This means we
+ * can pretty much ignore SAVE_POINTERS and RESTORE_POINTERS messages
+ * if we keep all the critical pointers and counters in SCp:
+ * - SCp.ptr is the pointer into the RAM buffer
+ * - SCp.this_residual is the size of that buffer
+ * - SCp.buffer points to the current scatter-gather buffer
+ * - SCp.buffers_residual tells us how many S.G. buffers there are
+ * - SCp.have_data_in helps keep track of >2048 byte transfers
+ * - SCp.sent_command is not used
+ * - SCp.phase records this command's SRCID_ER bit setting
+ */
+
+ if (cmd->use_sg) {
+ cmd->SCp.buffer = (struct scatterlist *)cmd->buffer;
+ cmd->SCp.buffers_residual = cmd->use_sg - 1;
+ cmd->SCp.ptr = (char *)cmd->SCp.buffer->address;
+ cmd->SCp.this_residual = cmd->SCp.buffer->length;
+ }
+ else {
+ cmd->SCp.buffer = NULL;
+ cmd->SCp.buffers_residual = 0;
+ cmd->SCp.ptr = (char *)cmd->request_buffer;
+ cmd->SCp.this_residual = cmd->request_bufflen;
+ }
+ cmd->SCp.have_data_in = 0;
+
+/* We don't set SCp.phase here - that's done in in2000_execute() */
+
+/* Preset the command status to GOOD, since that's the normal case */
+
+ cmd->SCp.Status = GOOD;
+
+ save_flags(flags);
+ cli();
+
+ /*
+ * Add the cmd to the end of 'input_Q'. Note that REQUEST_SENSE
+ * commands are added to the head of the queue so that the desired
+ * sense data is not lost before REQUEST_SENSE executes.
+ */
+
+ if (!(hostdata->input_Q) || (cmd->cmnd[0] == REQUEST_SENSE)) {
+ cmd->host_scribble = (uchar *)hostdata->input_Q;
+ hostdata->input_Q = cmd;
+ }
+ else { /* find the end of the queue */
+ for (tmp=(Scsi_Cmnd *)hostdata->input_Q; tmp->host_scribble;
+ tmp=(Scsi_Cmnd *)tmp->host_scribble)
+ ;
+ tmp->host_scribble = (uchar *)cmd;
+ }
+
+/* We know that there's at least one command in 'input_Q' now.
+ * Go see if any of them are runnable!
+ */
- if(inb(INSTAT) & 0x20) return 0xffffff; /* not readable now */
- outb(TXCNTH,INSTAT); /* then autoincrement */
- total = (inb(INDATA) & 0xff) << 16;
- outb(TXCNTM,INSTAT);
- total += (inb(INDATA) & 0xff) << 8;
- outb(TXCNTL,INSTAT);
- total += (inb(INDATA) & 0xff);
- return total;
+ in2000_execute(cmd->host);
+
+DB(DB_QUEUE_COMMAND,printk(")Q-%ld ",cmd->pid))
+
+ restore_flags(flags);
+ return 0;
}
+
+
/*
- * Note: the FIFO is screwy, and has a counter granularity of 16 bytes, so
- * we have to reconcile the FIFO counter, the transaction byte count from the
- * WD chip, and of course, our desired transaction size. It may look strange,
- * and could probably use improvement, but it works, for now.
- */
-
-static void in2000_fifo_out(void) /* uses FIFOCNTR */
-{
- unsigned count, infcnt, txcnt;
-
- infcnt = inb(INFCNT)& 0xfe; /* FIFO counter */
- do {
- txcnt = in2000_txcnt();
-/*DEB(printk("FIw:%d %02x %d\n", in2000_datalen, infcnt, txcnt));*/
- count = (infcnt << 3) - 32; /* don't fill completely */
- if ( count > in2000_datalen )
- count = in2000_datalen; /* limit to actual data on hand */
- count >>= 1; /* Words, not bytes */
-#ifdef FAST_FIFO_IO
- if ( count ) {
- port_write(INFIFO, in2000_dataptr, count);
- in2000_datalen -= (count<<1);
- }
-#else
- while ( count-- )
- {
- outw(*in2000_dataptr++, INFIFO);
- in2000_datalen -= 2;
- }
-#endif
- } while((in2000_datalen > 0) && ((infcnt = (inb(INFCNT)) & 0xfe) >= 0x20) );
- /* If scatter-gather, go on to next segment */
- if( !in2000_datalen && ++in2000_current_segment < in2000_nsegment)
- {
- in2000_scatter++;
- in2000_datalen = in2000_scatter->length;
- in2000_dataptr = (unsigned short*)in2000_scatter->address;
- }
- if ( in2000_datalen <= 0 )
- {
- ficmsk = 0;
- count = 32; /* Always says to use this much flush */
- while ( count-- )
- outw(0, INFIFO);
- outb(2, ININTR); /* Mask FIFO Interrupts when done */
- }
-}
-
-static void in2000_fifo_in(void) /* uses FIFOCNTR */
-{
- unsigned fic, count, count2;
-
- count = inb(INFCNT) & 0xe1;
- do{
- count2 = count;
- count = (fic = inb(INFCNT)) & 0xe1;
- } while ( count != count2 );
-DEB(printk("FIir:%d %02x %08x\n", in2000_datalen,fic,(unsigned int )in2000_dataptr));
- do {
- count2 = in2000_txcnt(); /* bytes yet to come over SCSI bus */
-DEB(printk("FIr:%d %02x %08x %08x\n", in2000_datalen,fic,count2,(unsigned int)in2000_dataptr));
- if(count2 > 65536) count2 = 0;
- if(fic > 128) count = 1024;
- else if(fic > 64) count = 512;
- else if (fic > 32) count = 256;
- else if ( count2 < in2000_datalen ) /* if drive has < what we want */
- count = in2000_datalen - count2; /* FIFO has the rest */
- if ( count > in2000_datalen ) /* count2 is lesser of FIFO & rqst */
- count2 = in2000_datalen >> 1; /* converted to word count */
- else
- count2 = count >> 1;
- count >>= 1; /* also to words */
- count -= count2; /* extra left over in FIFO */
-#ifdef FAST_FIFO_IO
- if ( count2 ) {
- port_read(INFIFO, in2000_dataptr, count2);
- in2000_datalen -= (count2<<1);
- }
-#else
- while ( count2-- )
- {
- *in2000_dataptr++ = inw(INFIFO);
- in2000_datalen -=2;
- }
-#endif
- } while((in2000_datalen > 0) && (fic = inb(INFCNT)) );
-DEB(printk("FIer:%d %02x %08x\n", in2000_datalen,fic,(unsigned int )in2000_dataptr));
-/* while ( count-- )
- inw(INFIFO);*/ /* Throw away some extra stuff */
- if( !in2000_datalen && ++in2000_current_segment < in2000_nsegment)
- {
- in2000_scatter++;
- in2000_datalen = in2000_scatter->length;
- in2000_dataptr = (unsigned short*)in2000_scatter->address;
- }
- if ( ! in2000_datalen ){
- outb(2, ININTR); /* Mask FIFO Interrupts when done */
- ficmsk = 0;}
-}
-
-static void in2000_intr_handle(int irq, void *dev_id, struct pt_regs *regs)
-{
- int result=0;
- unsigned int count,auxstatus,scsistatus,cmdphase,scsibyte;
- int action=0;
- Scsi_Cmnd *SCptr;
-
- DEB(printk("INT:%d %02x %08x\n", in2000_datalen, inb(INFCNT),(unsigned int)in2000_dataptr));
-
- if (( (ficmsk & (count = inb(INFCNT))) == 0xfe ) ||
- ( (inb(INSTAT) & 0x8c) == 0x80))
- { /* FIFO interrupt or WD interrupt */
- auxstatus = inb(INSTAT); /* need to save now */
- outb(SCSIST,INSTAT);
- scsistatus = inb(INDATA); /* This clears the WD intrpt bit */
- outb(TARGETU,INSTAT); /* then autoincrement */
- scsibyte = inb(INDATA); /* Get the scsi status byte */
- outb(CMDPHAS,INSTAT);
- cmdphase = inb(INDATA);
- DEB(printk("(int2000:%02x %02x %02x %02x %02x)\n",count,auxstatus,
- scsistatus,cmdphase,scsibyte));
-
- /* Why do we assume that we need to send more data here??? ERY */
- if ( in2000_datalen ) /* data xfer pending */
- {
- if ( in2000_dataptr == NULL )
- printk("int2000: dataptr=NULL datalen=%d\n",
- in2000_datalen);
- else if ( in2000_datawrite )
- in2000_fifo_out();
- else
- in2000_fifo_in();
- }
- if ( (auxstatus & 0x8c) == 0x80 )
- { /* There is a WD Chip interrupt & register read good */
- outb(2,ININTR); /* Disable fifo interrupts */
- ficmsk = 0;
- result = DID_OK << 16;
- /* 16=Select & transfer complete, 85=got disconnect */
- if ((scsistatus != 0x16) && (scsistatus != 0x85)
- && (scsistatus != 0x42)){
-/* printk("(WDi2000:%02x %02x %02x %02x %02x)\n",count,auxstatus,
- scsistatus,cmdphase,scsibyte);*/
-/* printk("QDAT:%d %08x %02x\n",
- in2000_datalen,(unsigned int)in2000_dataptr,ficmsk);*/
- ;
- }
- switch ( scsistatus & 0xf0 )
- {
- case 0x00: /* Card Reset Completed */
- action = 3;
- break;
- case 0x10: /* Successful Command Completion */
- if ( scsistatus & 0x8 )
- action = 1;
- break;
- case 0x20: /* Command Paused or Aborted */
- if ( (scsistatus & 0x8) )
- action = 1;
- else if ( (scsistatus & 7) < 2 )
- action = 2;
- else
- result = DID_ABORT << 16;
- break;
- case 0x40: /* Terminated early */
- if ( scsistatus & 0x8 )
- action = 1;
- else if ( (scsistatus & 7) > 2 )
- action = 2;
- else
- result = DID_TIME_OUT << 16;
- break;
- case 0x80: /* Service Required from SCSI bus */
- if ( scsistatus & 0x8 )
- action = 1;
- else
- action = 2;
- break;
- } /* end switch(scsistatus) */
- outb(0,INFLED);
- switch ( action )
- {
- case 0x02: /* Issue an abort */
- outb(COMMAND,INSTAT);
- outb(1,INDATA); /* ABORT COMMAND */
- result = DID_ABORT << 16;
- case 0x00: /* Basically all done */
- if ( ! in2000_SCptr )
- return;
- in2000_SCptr->result = result | scsibyte;
- SCptr = in2000_SCptr;
- in2000_SCptr = 0;
- if ( in2000_done )
- (*in2000_done)(SCptr);
- break;
- case 0x01: /* We need to reissue a command */
- outb(CMDPHAS,INSTAT);
- switch ( scsistatus & 7 )
- {
- case 0: /* Data out phase */
- case 1: /* Data in phase */
- case 4: /* Unspec info out phase */
- case 5: /* Unspec info in phase */
- case 6: /* Message in phase */
- case 7: /* Message in phase */
- outb(0x41,INDATA); /* rdy to disconn */
- break;
- case 2: /* command phase */
- outb(0x30,INDATA); /* rdy to send cmd bytes */
- break;
- case 3: /* status phase */
- outb(0x45,INDATA); /* To go to status phase,*/
- outb(TXCNTH,INSTAT); /* elim. data, autoinc */
- outb(0,INDATA);
- outb(0,INDATA);
- outb(0,INDATA);
- in2000_datalen = 0;
- in2000_dataptr = 0;
- break;
- } /* end switch(scsistatus) */
- outb(COMMAND,INSTAT);
- outb(8,INDATA); /* RESTART THE COMMAND */
- break;
- case 0x03: /* Finish up a Card Reset */
- outb(TIMEOUT,INSTAT); /* I got these values */
- /* by reverse Engineering */
- outb(IN2000_TMOUT,INDATA); /* the Always' bios. */
- outb(CONTROL,INSTAT);
- outb(0,INDATA);
- outb(SYNCTXR,INSTAT);
- outb(0x40,INDATA); /* async, 4 cyc xfer per. */
- break;
- } /* end switch(action) */
- } /* end if auxstatus for WD int */
- } /* end while intrpt active */
-}
-
-int in2000_queuecommand(Scsi_Cmnd * SCpnt, void (*done)(Scsi_Cmnd *))
-{
- unchar direction;
- unchar *cmd = (unchar *) SCpnt->cmnd;
- unchar target = SCpnt->target;
- void *buff = SCpnt->request_buffer;
- unsigned long flags;
- int bufflen = SCpnt->request_bufflen;
- int timeout, size, loop;
- int i;
+ * This routine attempts to start a scsi command. If the host_card is
+ * already connected, we give up immediately. Otherwise, look through
+ * the input_Q, using the first command we find that's intended
+ * for a currently non-busy target/lun.
+ */
+void in2000_execute (struct Scsi_Host *instance)
+{
+struct IN2000_hostdata *hostdata;
+Scsi_Cmnd *cmd, *prev;
+unsigned long flags;
+int i;
+unsigned short *sp;
+unsigned short f;
+unsigned short flushbuf[16];
- /*
- * This SCSI command has no data phase, but unfortunately the mid-level
- * SCSI drivers ask for 256 bytes of data xfer. Our card hangs if you
- * do this, so we protect against it here. It would be nice if the mid-
- * level could be changed, but who knows if that would break other host
- * adapter drivers.
- */
- if ( *cmd == TEST_UNIT_READY )
- bufflen = 0;
+
+ save_flags(flags);
+ cli();
+ hostdata = (struct IN2000_hostdata *)instance->hostdata;
+
+DB(DB_EXECUTE,printk("EX("))
+
+ if (hostdata->selecting || hostdata->connected) {
+
+DB(DB_EXECUTE,printk(")EX-0 "))
+
+ restore_flags(flags);
+ return;
+ }
/*
- * What it looks like. Boy did I get tired of reading its output.
- */
- if (*cmd == READ_10 || *cmd == WRITE_10) {
- i = xscsi2int((cmd+1));
- } else if (*cmd == READ_6 || *cmd == WRITE_6) {
- i = scsi2int((cmd+1));
- } else {
- i = -1;
- }
-#ifdef DEBUG
- printk("in2000qcmd: pos %d len %d ", i, bufflen);
- printk("scsi cmd:");
- for (i = 0; i < SCpnt->cmd_len; i++) printk("%02x ", cmd[i]);
- printk("\n");
-#endif
- direction = 1; /* assume for most commands */
- if (*cmd == WRITE_10 || *cmd == WRITE_6)
- direction = 0;
- size = SCpnt->cmd_len; /* CDB length */
- /*
- * Setup our current pointers
- * This is where you would allocate a control structure in a queue,
- * If you were going to upgrade this to do multiple issue.
- * Note that datalen and dataptr exist because we can change the
- * values during the course of the operation, while managing the
- * FIFO.
- * Note the nasty little first clause. In theory, the mid-level
- * drivers should never hand us more than one command at a time,
- * but just in case someone gets cute in configuring the driver,
- * we'll protect them, although not very politely.
- */
- if ( in2000_SCptr )
- {
- printk("in2000_queue_command waiting for free command block!\n");
- while ( in2000_SCptr )
- barrier();
- }
- for ( timeout = jiffies + 5; timeout > jiffies; )
- {
- if ( ! ( inb(INSTAT) & 0xb0 ) )
- {
- timeout = 0;
- break;
- }
- else
- {
- inb(INSTAT);
- outb(SCSIST,INSTAT);
- inb(INDATA);
- outb(TARGETU,INSTAT); /* then autoinc */
- inb(INDATA);
- inb(INDATA);
- }
- }
- if ( timeout )
- {
- printk("in2000_queue_command timeout!\n");
- SCpnt->result = DID_TIME_OUT << 16;
- (*done)(SCpnt);
- return 1;
- }
- /* Added for scatter-gather support */
- in2000_nsegment = SCpnt->use_sg;
- in2000_current_segment = 0;
- if(SCpnt->use_sg){
- in2000_scatter = (struct scatterlist *) buff;
- in2000_datalen = in2000_scatter->length;
- in2000_dataptr = (unsigned short*)in2000_scatter->address;
- } else {
- in2000_scatter = NULL;
- in2000_datalen = bufflen;
- in2000_dataptr = (unsigned short*) buff;
- };
- in2000_done = done;
- in2000_SCptr = SCpnt;
- /*
- * Write the CDB to the card, then the LUN, the length, and the target.
- */
- outb(TOTSECT, INSTAT); /* start here then autoincrement */
- for ( loop=0; loop < size; loop++ )
- outb(cmd[loop],INDATA);
- outb(TARGETU,INSTAT);
- outb(SCpnt->lun & 7,INDATA);
- SCpnt->host_scribble = NULL;
- outb(TXCNTH,INSTAT); /* then autoincrement */
- outb(bufflen>>16,INDATA);
- outb(bufflen>>8,INDATA);
- outb(bufflen,INDATA);
- outb(target&7,INDATA);
- /*
- * Set up the FIFO
- */
- save_flags(flags);
- cli(); /* so FIFO init waits till WD set */
- outb(0,INFRST);
- if ( direction == 1 )
- {
- in2000_datawrite = 0;
- outb(0,INFWRT);
- }
- else
- {
- in2000_datawrite = 1;
- for ( loop=16; --loop; ) /* preload the outgoing fifo */
- {
- outw(*in2000_dataptr++,INFIFO);
- if(in2000_datalen > 0) in2000_datalen-=2;
- }
- }
- ficmsk = 0xff;
- /*
- * Start it up
+ * Search through the input_Q for a command destined
+ * for an idle target/lun.
*/
- outb(CONTROL,INSTAT); /* WD BUS Mode */
- outb(0x4C,INDATA);
- if ( in2000_datalen ) /* if data xfer cmd */
- outb(0,ININTR); /* Enable FIFO intrpt some boards? */
- outb(COMMAND,INSTAT);
- outb(0,INNLED);
- outb(8,INDATA); /* Select w/ATN & Transfer */
- restore_flags(flags); /* let the intrpt rip */
- return 0;
+
+ cmd = (Scsi_Cmnd *)hostdata->input_Q;
+ prev = 0;
+ while (cmd) {
+ if (!(hostdata->busy[cmd->target] & (1 << cmd->lun)))
+ break;
+ prev = cmd;
+ cmd = (Scsi_Cmnd *)cmd->host_scribble;
+ }
+
+ /* quit if queue empty or all possible targets are busy */
+
+ if (!cmd) {
+
+DB(DB_EXECUTE,printk(")EX-1 "))
+
+ restore_flags(flags);
+ return;
+ }
+
+ /* remove command from queue */
+
+ if (prev)
+ prev->host_scribble = cmd->host_scribble;
+ else
+ hostdata->input_Q = (Scsi_Cmnd *)cmd->host_scribble;
+
+/*
+ * Start the selection process
+ */
+
+ if (IS_DIR_OUT(cmd))
+ write_3393(hostdata,WD_DESTINATION_ID, cmd->target);
+ else
+ write_3393(hostdata,WD_DESTINATION_ID, cmd->target | DSTID_DPD);
+
+/* Now we need to figure out whether or not this command is a good
+ * candidate for disconnect/reselect. We guess to the best of our
+ * ability, based on a set of hierarchical rules. When several
+ * devices are operating simultaneously, disconnects are usually
+ * an advantage. In a single device system, or if only 1 device
+ * is being accessed, transfers usually go faster if disconnects
+ * are not allowed:
+ *
+ * + Commands should NEVER disconnect if hostdata->disconnect =
+ * DIS_NEVER (this holds for tape drives also), and ALWAYS
+ * disconnect if hostdata->disconnect = DIS_ALWAYS.
+ * + Tape drive commands should always be allowed to disconnect.
+ * + Disconnect should be allowed if disconnected_Q isn't empty.
+ * + Commands should NOT disconnect if input_Q is empty.
+ * + Disconnect should be allowed if there are commands in input_Q
+ * for a different target/lun. In this case, the other commands
+ * should be made disconnect-able, if not already.
+ *
+ * I know, I know - this code would flunk me out of any
+ * "C Programming 101" class ever offered. But it's easy
+ * to change around and experiment with for now.
+ */
+
+ cmd->SCp.phase = 0; /* assume no disconnect */
+ if (hostdata->disconnect == DIS_NEVER)
+ goto no;
+ if (hostdata->disconnect == DIS_ALWAYS)
+ goto yes;
+ if (cmd->device->type == 1) /* tape drive? */
+ goto yes;
+ if (hostdata->disconnected_Q) /* other commands disconnected? */
+ goto yes;
+ if (!(hostdata->input_Q)) /* input_Q empty? */
+ goto no;
+ for (prev=(Scsi_Cmnd *)hostdata->input_Q; prev;
+ prev=(Scsi_Cmnd *)prev->host_scribble) {
+ if ((prev->target != cmd->target) || (prev->lun != cmd->lun)) {
+ for (prev=(Scsi_Cmnd *)hostdata->input_Q; prev;
+ prev=(Scsi_Cmnd *)prev->host_scribble)
+ prev->SCp.phase = 1;
+ goto yes;
+ }
+ }
+ goto no;
+
+yes:
+ cmd->SCp.phase = 1;
+
+#ifdef PROC_INTERFACE
+ disc_allowed_total++;
+#endif
+
+no:
+ write_3393(hostdata,WD_SOURCE_ID,((cmd->SCp.phase)?SRCID_ER:0));
+
+ write_3393(hostdata,WD_TARGET_LUN, cmd->lun);
+ write_3393(hostdata,WD_SYNCHRONOUS_TRANSFER,hostdata->sync_xfer[cmd->target]);
+ hostdata->busy[cmd->target] |= (1 << cmd->lun);
+
+ if ((hostdata->level2 <= L2_NONE) ||
+ (hostdata->sync_stat[cmd->target] == SS_UNSET)) {
+
+ /*
+ * Do a 'Select-With-ATN' command. This will end with
+ * one of the following interrupts:
+ * CSR_RESEL_AM: failure - can try again later.
+ * CSR_TIMEOUT: failure - give up.
+ * CSR_SELECT: success - proceed.
+ */
+
+ hostdata->selecting = cmd;
+
+/* Every target has its own synchronous transfer setting, kept in
+ * the sync_xfer array, and a corresponding status byte in sync_stat[].
+ * Each target's sync_stat[] entry is initialized to SS_UNSET, and its
+ * sync_xfer[] entry is initialized to the default/safe value. SS_UNSET
+ * means that the parameters are undetermined as yet, and that we
+ * need to send an SDTR message to this device after selection is
+ * complete. We set SS_FIRST to tell the interrupt routine to do so,
+ * unless we don't want to even _try_ synchronous transfers: In this
+ * case we set SS_SET to make the defaults final.
+ */
+ if (hostdata->sync_stat[cmd->target] == SS_UNSET) {
+ if (hostdata->sync_off & (1 << cmd->target))
+ hostdata->sync_stat[cmd->target] = SS_SET;
+ else
+ hostdata->sync_stat[cmd->target] = SS_FIRST;
+ }
+ hostdata->state = S_SELECTING;
+ write_3393_count(hostdata,0); /* this guarantees a DATA_PHASE interrupt */
+ write_3393_cmd(hostdata,WD_CMD_SEL_ATN);
+ }
+
+ else {
+
+ /*
+ * Do a 'Select-With-ATN-Xfer' command. This will end with
+ * one of the following interrupts:
+ * CSR_RESEL_AM: failure - can try again later.
+ * CSR_TIMEOUT: failure - give up.
+ * anything else: success - proceed.
+ */
+
+ hostdata->connected = cmd;
+ write_3393(hostdata,WD_COMMAND_PHASE, 0);
+
+ /* copy command_descriptor_block into WD chip
+ * (take advantage of auto-incrementing)
+ */
+
+ write1_io(WD_CDB_1, IO_WD_ADDR);
+ for (i=0; i<cmd->cmd_len; i++)
+ write1_io(cmd->cmnd[i], IO_WD_DATA);
+
+ /* The wd33c93 only knows about Group 0, 1, and 5 commands when
+ * it's doing a 'select-and-transfer'. To be safe, we write the
+ * size of the CDB into the OWN_ID register for every case. This
+ * way there won't be problems with vendor-unique, audio, etc.
+ */
+
+ write_3393(hostdata, WD_OWN_ID, cmd->cmd_len);
+
+ /* When doing a non-disconnect command, we can save ourselves a DATA
+ * phase interrupt later by setting everything up now. With writes we
+ * need to pre-fill the fifo; if there's room for the 32 flush bytes,
+ * put them in there too - that'll avoid a fifo interrupt. Reads are
+ * somewhat simpler.
+ * KLUDGE NOTE: It seems that you can't completely fill the fifo here:
+ * This results in the IO_FIFO_COUNT register rolling over to zero,
+ * and apparently the gate array logic sees this as empty, not full,
+ * so the 3393 chip is never signalled to start reading from the
+ * fifo. Or maybe it's seen as a permanent fifo interrupt condition.
+ * Regardless, we fix this by temporarily pretending that the fifo
+ * is 16 bytes smaller. (I see now that the old driver has a comment
+ * about "don't fill completely" in an analogous place - must be the
+ * same deal.) This results in CDROM, swap partitions, and tape drives
+ * needing an extra interrupt per write command - I think we can live
+ * with that!
+ */
+
+ if (!(cmd->SCp.phase)) {
+ write_3393_count(hostdata, cmd->SCp.this_residual);
+ write_3393(hostdata,WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_BUS);
+ write1_io(0, IO_FIFO_WRITE); /* clear fifo counter, write mode */
+
+ if (IS_DIR_OUT(cmd)) {
+ hostdata->fifo = FI_FIFO_WRITING;
+ if ((i = cmd->SCp.this_residual) > (IN2000_FIFO_SIZE - 16) )
+ i = IN2000_FIFO_SIZE - 16;
+ cmd->SCp.have_data_in = i; /* this much data in fifo */
+ i >>= 1; /* Gulp. Assumimg modulo 2. */
+ sp = (unsigned short *)cmd->SCp.ptr;
+ f = hostdata->io_base + IO_FIFO;
+
+#ifdef FAST_WRITE_IO
+
+ FAST_WRITE2_IO();
+#else
+ while (i--)
+ write2_io(*sp++,IO_FIFO);
+
+#endif
+
+ /* Is there room for the flush bytes? */
+
+ if (cmd->SCp.have_data_in <= ((IN2000_FIFO_SIZE - 16) - 32)) {
+ sp = flushbuf;
+ i = 16;
+
+#ifdef FAST_WRITE_IO
+
+ FAST_WRITE2_IO();
+#else
+ while (i--)
+ write2_io(0,IO_FIFO);
+
+#endif
+
+ }
+ }
+
+ else {
+ write1_io(0, IO_FIFO_READ); /* put fifo in read mode */
+ hostdata->fifo = FI_FIFO_READING;
+ cmd->SCp.have_data_in = 0; /* nothing transfered yet */
+ }
+
+ }
+ else {
+ write_3393_count(hostdata,0); /* this guarantees a DATA_PHASE interrupt */
+ }
+ hostdata->state = S_RUNNING_LEVEL2;
+ write_3393_cmd(hostdata,WD_CMD_SEL_ATN_XFER);
+ }
+
+ /*
+ * Since the SCSI bus can handle only 1 connection at a time,
+ * we get out of here now. If the selection fails, or when
+ * the command disconnects, we'll come back to this routine
+ * to search the input_Q again...
+ */
+
+DB(DB_EXECUTE,printk("%s%ld)EX-2 ",(cmd->SCp.phase)?"d:":"",cmd->pid))
+
+ restore_flags(flags);
}
-static volatile int internal_done_flag = 0;
-static volatile int internal_done_errcode = 0;
-static void internal_done(Scsi_Cmnd * SCpnt)
+
+void transfer_pio(uchar *buf, int cnt,
+ int data_in_dir, struct IN2000_hostdata *hostdata)
{
- internal_done_errcode = SCpnt->result;
- ++internal_done_flag;
+uchar asr;
+
+DB(DB_TRANSFER,printk("(%p,%d,%s)",buf,cnt,data_in_dir?"in":"out"))
+
+ write_3393(hostdata,WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
+ write_3393_count(hostdata,cnt);
+ write_3393_cmd(hostdata,WD_CMD_TRANS_INFO);
+ if (data_in_dir) {
+ do {
+ asr = READ_AUX_STAT();
+ if (asr & ASR_DBR)
+ *buf++ = read_3393(hostdata,WD_DATA);
+ } while (!(asr & ASR_INT));
+ }
+ else {
+ do {
+ asr = READ_AUX_STAT();
+ if (asr & ASR_DBR)
+ write_3393(hostdata,WD_DATA, *buf++);
+ } while (!(asr & ASR_INT));
+ }
+
+ /* Note: we are returning with the interrupt UN-cleared.
+ * Since (presumably) an entire I/O operation has
+ * completed, the bus phase is probably different, and
+ * the interrupt routine will discover this when it
+ * responds to the uncleared int.
+ */
+
}
-int in2000_command(Scsi_Cmnd * SCpnt)
+
+
+void transfer_bytes(Scsi_Cmnd *cmd, int data_in_dir)
{
- in2000_queuecommand(SCpnt, internal_done);
+struct IN2000_hostdata *hostdata;
+unsigned short *sp;
+unsigned short f;
+int i;
+
+ hostdata = (struct IN2000_hostdata *)cmd->host->hostdata;
+
+/* Normally, you'd expect 'this_residual' to be non-zero here.
+ * In a series of scatter-gather transfers, however, this
+ * routine will usually be called with 'this_residual' equal
+ * to 0 and 'buffers_residual' non-zero. This means that a
+ * previous transfer completed, clearing 'this_residual', and
+ * now we need to setup the next scatter-gather buffer as the
+ * source or destination for THIS transfer.
+ */
+ if (!cmd->SCp.this_residual && cmd->SCp.buffers_residual) {
+ ++cmd->SCp.buffer;
+ --cmd->SCp.buffers_residual;
+ cmd->SCp.this_residual = cmd->SCp.buffer->length;
+ cmd->SCp.ptr = cmd->SCp.buffer->address;
+ }
+
+/* Set up hardware registers */
+
+ write_3393(hostdata,WD_SYNCHRONOUS_TRANSFER,hostdata->sync_xfer[cmd->target]);
+ write_3393_count(hostdata,cmd->SCp.this_residual);
+ write_3393(hostdata,WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_BUS);
+ write1_io(0,IO_FIFO_WRITE); /* zero counter, assume write */
+
+/* Reading is easy. Just issue the command and return - we'll
+ * get an interrupt later when we have actual data to worry about.
+ */
+
+ if (data_in_dir) {
+ write1_io(0,IO_FIFO_READ);
+ if ((hostdata->level2 >= L2_DATA) || (cmd->SCp.phase == 0)) {
+ write_3393(hostdata,WD_COMMAND_PHASE,0x45);
+ write_3393_cmd(hostdata,WD_CMD_SEL_ATN_XFER);
+ hostdata->state = S_RUNNING_LEVEL2;
+ }
+ else
+ write_3393_cmd(hostdata,WD_CMD_TRANS_INFO);
+ hostdata->fifo = FI_FIFO_READING;
+ cmd->SCp.have_data_in = 0;
+ return;
+ }
+
+/* Writing is more involved - we'll start the WD chip and write as
+ * much data to the fifo as we can right now. Later interrupts will
+ * write any bytes that don't make it at this stage.
+ */
+
+ if ((hostdata->level2 >= L2_DATA) || (cmd->SCp.phase == 0)) {
+ write_3393(hostdata,WD_COMMAND_PHASE,0x45);
+ write_3393_cmd(hostdata,WD_CMD_SEL_ATN_XFER);
+ hostdata->state = S_RUNNING_LEVEL2;
+ }
+ else
+ write_3393_cmd(hostdata,WD_CMD_TRANS_INFO);
+ hostdata->fifo = FI_FIFO_WRITING;
+ sp = (unsigned short *)cmd->SCp.ptr;
+
+ if ((i = cmd->SCp.this_residual) > IN2000_FIFO_SIZE)
+ i = IN2000_FIFO_SIZE;
+ cmd->SCp.have_data_in = i;
+ i >>= 1; /* Gulp. We assume this_residual is modulo 2 */
+ f = hostdata->io_base + IO_FIFO;
+
+#ifdef FAST_WRITE_IO
+
+ FAST_WRITE2_IO();
+#else
+ while (i--)
+ write2_io(*sp++,IO_FIFO);
+
+#endif
- while (!internal_done_flag);
- internal_done_flag = 0;
- return internal_done_errcode;
}
-int in2000_detect(Scsi_Host_Template * tpnt)
+
+/* It appears that the Linux interrupt dispatcher calls this
+ * function in a non-reentrant fashion. What that means to us
+ * is that we can use an SA_INTERRUPT type of interrupt (which
+ * is faster), and do an sti() right away to let timer, serial,
+ * etc. ints happen.
+ *
+ * WHOA! Wait a minute, pardner! Does this hold when more than
+ * one card has been detected?? I doubt it. Maybe better
+ * re-think the multiple card capability....
+ */
+
+#if LINUX_VERSION_CODE >= 0x010346 /* 1.3.70 */
+void in2000_intr (int irqnum, void * dev_id, struct pt_regs *ptregs)
+#else
+void in2000_intr (int irqnum, struct pt_regs *ptregs)
+#endif
{
-/* Order chosen to reduce conflicts with some multi-port serial boards */
- int base_tab[] = { 0x220,0x200,0x110,0x100 };
- int int_tab[] = { 15,14,11,10 };
- struct Scsi_Host * shpnt;
- int loop, tmp;
-
- DEB(printk("in2000_detect: \n"));
-
- tpnt->proc_dir = &proc_scsi_in2000;
-
- for ( loop=0; loop < 4; loop++ )
- {
- base = base_tab[loop];
- if ( in2000_test_port(loop)) break;
- }
- if ( loop == 4 )
- return 0;
-
- /* Read the dip switch values again for miscellaneous checking and
- informative messages */
- tmp = inb(INFLED);
+struct Scsi_Host *instance;
+struct IN2000_hostdata *hostdata;
+Scsi_Cmnd *patch, *cmd;
+unsigned long flags;
+uchar asr, sr, phs, id, lun, *ucp, msg;
+int i,j;
+unsigned long length;
+unsigned short *sp;
+unsigned short f;
+
+ for (instance = instance_list; instance; instance = instance->next) {
+ if (instance->irq == irqnum)
+ break;
+ }
+ if (!instance) {
+ printk("*** Hmm... interrupts are screwed up! ***\n");
+ return;
+ }
+ hostdata = (struct IN2000_hostdata *)instance->hostdata;
+
+/* OK - it should now be safe to re-enable system interrupts */
+
+ save_flags(flags);
+ sti();
+
+/* The IN2000 card has 2 interrupt sources OR'ed onto its IRQ line - the
+ * WD3393 chip and the 2k fifo (which is actually a dual-port RAM combined
+ * with a big logic array, so it's a little different than what you might
+ * expect). As far as I know, there's no reason that BOTH can't be active
+ * at the same time, but there's a problem: while we can read the 3393
+ * to tell if _it_ wants an interrupt, I don't know of a way to ask the
+ * fifo the same question. The best we can do is check the 3393 and if
+ * it _isn't_ the source of the interrupt, then we can be pretty sure
+ * that the fifo is the culprit.
+ * UPDATE: I have it on good authority (Bill Earnest) that bit 0 of the
+ * IO_FIFO_COUNT register mirrors the fifo interrupt state. I
+ * assume that bit clear means interrupt active. As it turns
+ * out, the driver really doesn't need to check for this after
+ * all, so my remarks above about a 'problem' can safely be
+ * ignored. The way the logic is set up, there's no advantage
+ * (that I can see) to worrying about it.
+ *
+ * It seems that the fifo interrupt signal is negated when we extract
+ * bytes during read or write bytes during write.
+ * - fifo will interrupt when data is moving from it to the 3393, and
+ * there are 31 (or less?) bytes left to go. This is sort of short-
+ * sighted: what if you don't WANT to do more? In any case, our
+ * response is to push more into the fifo - either actual data or
+ * dummy bytes if need be. Note that we apparently have to write at
+ * least 32 additional bytes to the fifo after an interrupt in order
+ * to get it to release the ones it was holding on to - writing fewer
+ * than 32 will result in another fifo int.
+ * UPDATE: Again, info from Bill Earnest makes this more understandable:
+ * 32 bytes = two counts of the fifo counter register. He tells
+ * me that the fifo interrupt is a non-latching signal derived
+ * from a straightforward boolean interpretation of the 7
+ * highest bits of the fifo counter and the fifo-read/fifo-write
+ * state. Who'd a thought?
+ */
+
+ write1_io(0, IO_LED_ON);
+ asr = READ_AUX_STAT();
+ if (!(asr & ASR_INT)) { /* no WD33c93 interrupt? */
+
+/* Ok. This is definitely a FIFO-only interrupt.
+ *
+ * If FI_FIFO_READING is set, there are up to 2048 bytes waiting to be read,
+ * maybe more to come from the SCSI bus. Read as many as we can out of the
+ * fifo and into memory at the location of SCp.ptr[SCp.have_data_in], and
+ * update have_data_in afterwards.
+ *
+ * If we have FI_FIFO_WRITING, the FIFO has almost run out of bytes to move
+ * into the WD3393 chip (I think the interrupt happens when there are 31
+ * bytes left, but it may be fewer...). The 3393 is still waiting, so we
+ * shove some more into the fifo, which gets things moving again. If the
+ * original SCSI command specified more than 2048 bytes, there may still
+ * be some of that data left: fine - use it (from SCp.ptr[SCp.have_data_in]).
+ * Don't forget to update have_data_in. If we've already written out the
+ * entire buffer, feed 32 dummy bytes to the fifo - they're needed to
+ * push out the remaining real data.
+ * (Big thanks to Bill Earnest for getting me out of the mud in here.)
+ */
+
+ cmd = (Scsi_Cmnd *)hostdata->connected; /* assume we're connected */
+CHECK_NULL(cmd,"fifo_int")
+
+ if (hostdata->fifo == FI_FIFO_READING) {
+
+DB(DB_FIFO,printk("{R:%02x} ",read1_io(IO_FIFO_COUNT)))
+
+ sp = (unsigned short *)(cmd->SCp.ptr + cmd->SCp.have_data_in);
+ i = read1_io(IO_FIFO_COUNT) & 0xfe;
+ i <<= 2; /* # of words waiting in the fifo */
+ f = hostdata->io_base + IO_FIFO;
+
+#ifdef FAST_READ_IO
+
+ FAST_READ2_IO();
+#else
+ while (i--)
+ *sp++ = read2_io(IO_FIFO);
+
+#endif
+
+ i = sp - (unsigned short *)(cmd->SCp.ptr + cmd->SCp.have_data_in);
+ i <<= 1;
+ cmd->SCp.have_data_in += i;
+ }
+
+ else if (hostdata->fifo == FI_FIFO_WRITING) {
+
+DB(DB_FIFO,printk("{W:%02x} ",read1_io(IO_FIFO_COUNT)))
+
+/* If all bytes have been written to the fifo, flush out the stragglers.
+ * Note that while writing 16 dummy words seems arbitrary, we don't
+ * have another choice that I can see. What we really want is to read
+ * the 3393 transfer count register (that would tell us how many bytes
+ * needed flushing), but the TRANSFER_INFO command hasn't completed
+ * yet (not enough bytes!) and that register won't be accessible. So,
+ * we use 16 words - a number obtained through trial and error.
+ * UPDATE: Bill says this is exactly what Always does, so there.
+ * More thanks due him for help in this section.
+ */
+
+ if (cmd->SCp.this_residual == cmd->SCp.have_data_in) {
+ i = 16;
+ while (i--) /* write 32 dummy bytes */
+ write2_io(0,IO_FIFO);
+ }
+
+/* If there are still bytes left in the SCSI buffer, write as many as we
+ * can out to the fifo.
+ */
+
+ else {
+ sp = (unsigned short *)(cmd->SCp.ptr + cmd->SCp.have_data_in);
+ i = cmd->SCp.this_residual - cmd->SCp.have_data_in; /* bytes yet to go */
+ j = read1_io(IO_FIFO_COUNT) & 0xfe;
+ j <<= 2; /* how many words the fifo has room for */
+ if ((j << 1) > i)
+ j = (i >> 1);
+ while (j--)
+ write2_io(*sp++,IO_FIFO);
+
+ i = sp - (unsigned short *)(cmd->SCp.ptr + cmd->SCp.have_data_in);
+ i <<= 1;
+ cmd->SCp.have_data_in += i;
+ }
+ }
+
+ else {
+ printk("*** Spurious FIFO interrupt ***");
+ }
+
+ write1_io(0, IO_LED_OFF);
+ restore_flags(flags);
+ return;
+ }
+
+/* This interrupt was triggered by the WD33c93 chip. The fifo interrupt
+ * may also be asserted, but we don't bother to check it: we get more
+ * detailed info from FIFO_READING and FIFO_WRITING (see below).
+ */
+
+ cmd = (Scsi_Cmnd *)hostdata->connected; /* assume we're connected */
+ sr = read_3393(hostdata,WD_SCSI_STATUS); /* clear the interrupt */
+ phs = read_3393(hostdata,WD_COMMAND_PHASE);
+
+ if (!cmd && (sr != CSR_RESEL_AM && sr != CSR_TIMEOUT && sr != CSR_SELECT)) {
+ printk("\nNR:wd-intr-1\n");
+ write1_io(0, IO_LED_OFF);
+ restore_flags(flags);
+ return;
+ }
+
+DB(DB_INTR,printk("{%02x:%02x-",asr,sr))
+
+/* After starting a FIFO-based transfer, the next _WD3393_ interrupt is
+ * guarenteed to be in response to the completion of the transfer.
+ * If we were reading, there's probably data in the fifo that needs
+ * to be copied into RAM - do that here. Also, we have to update
+ * 'this_residual' and 'ptr' based on the contents of the
+ * TRANSFER_COUNT register, in case the device decided to do an
+ * intermediate disconnect (a device may do this if it has to
+ * do a seek, or just to be nice and let other devices have
+ * some bus time during long transfers).
+ * After doing whatever is necessary with the fifo, we go on and
+ * service the WD3393 interrupt normally.
+ */
+
+ if (hostdata->fifo == FI_FIFO_READING) {
+
+/* buffer index = start-of-buffer + #-of-bytes-already-read */
+
+ sp = (unsigned short *)(cmd->SCp.ptr + cmd->SCp.have_data_in);
+
+/* bytes remaining in fifo = (total-wanted - #-not-got) - #-already-read */
+
+ i = (cmd->SCp.this_residual - read_3393_count(hostdata)) - cmd->SCp.have_data_in;
+ i >>= 1; /* Gulp. We assume this will always be modulo 2 */
+ f = hostdata->io_base + IO_FIFO;
+
+#ifdef FAST_READ_IO
+
+ FAST_READ2_IO();
+#else
+ while (i--)
+ *sp++ = read2_io(IO_FIFO);
+
+#endif
+
+ hostdata->fifo = FI_FIFO_UNUSED;
+ length = cmd->SCp.this_residual;
+ cmd->SCp.this_residual = read_3393_count(hostdata);
+ cmd->SCp.ptr += (length - cmd->SCp.this_residual);
+
+DB(DB_TRANSFER,printk("(%p,%d)",cmd->SCp.ptr,cmd->SCp.this_residual))
+
+ }
+
+ else if (hostdata->fifo == FI_FIFO_WRITING) {
+ hostdata->fifo = FI_FIFO_UNUSED;
+ length = cmd->SCp.this_residual;
+ cmd->SCp.this_residual = read_3393_count(hostdata);
+ cmd->SCp.ptr += (length - cmd->SCp.this_residual);
+
+DB(DB_TRANSFER,printk("(%p,%d)",cmd->SCp.ptr,cmd->SCp.this_residual))
+
+ }
+
+/* Respond to the specific WD3393 interrupt - there are quite a few! */
+
+ switch (sr) {
+
+ case CSR_TIMEOUT:
+DB(DB_INTR,printk("TIMEOUT"))
+
+ cli();
+ if (hostdata->state == S_RUNNING_LEVEL2)
+ hostdata->connected = NULL;
+ else {
+ cmd = (Scsi_Cmnd *)hostdata->selecting; /* get a valid cmd */
+CHECK_NULL(cmd,"csr_timeout")
+ hostdata->selecting = NULL;
+ }
+
+ cmd->result = DID_NO_CONNECT << 16;
+ hostdata->busy[cmd->target] &= ~(1 << cmd->lun);
+ hostdata->state = S_UNCONNECTED;
+ cmd->scsi_done(cmd);
+
+/* We are not connected to a target - check to see if there
+ * are commands waiting to be executed.
+ */
+
+ sti();
+ in2000_execute(instance);
+ break;
+
+
+/* Note: this interrupt should not occur in a LEVEL2 command */
+
+ case CSR_SELECT:
+ cli();
+DB(DB_INTR,printk("SELECT"))
+ hostdata->connected = cmd = (Scsi_Cmnd *)hostdata->selecting;
+CHECK_NULL(cmd,"csr_select")
+ hostdata->selecting = NULL;
+
+ /* construct an IDENTIFY message with correct disconnect bit */
+
+ hostdata->outgoing_msg[0] = (0x80 | 0x00 | cmd->lun);
+ if (cmd->SCp.phase)
+ hostdata->outgoing_msg[0] |= 0x40;
+
+ if (hostdata->sync_stat[cmd->target] == SS_FIRST) {
+#ifdef SYNC_DEBUG
+printk(" sending SDTR ");
+#endif
+
+ hostdata->sync_stat[cmd->target] = SS_WAITING;
+
+ /* tack on a 2nd message to ask about synchronous transfers */
+
+ hostdata->outgoing_msg[1] = EXTENDED_MESSAGE;
+ hostdata->outgoing_msg[2] = 3;
+ hostdata->outgoing_msg[3] = EXTENDED_SDTR;
+ hostdata->outgoing_msg[4] = OPTIMUM_SX_PER/4;
+ hostdata->outgoing_msg[5] = OPTIMUM_SX_OFF;
+ hostdata->outgoing_len = 6;
+ }
+ else
+ hostdata->outgoing_len = 1;
+
+ hostdata->state = S_CONNECTED;
+ break;
+
+
+ case CSR_XFER_DONE|PHS_DATA_IN:
+ case CSR_UNEXP |PHS_DATA_IN:
+ case CSR_SRV_REQ |PHS_DATA_IN:
+DB(DB_INTR,printk("IN-%d.%d",cmd->SCp.this_residual,cmd->SCp.buffers_residual))
+ transfer_bytes(cmd, DATA_IN_DIR);
+ if (hostdata->state != S_RUNNING_LEVEL2)
+ hostdata->state = S_CONNECTED;
+ break;
+
+
+ case CSR_XFER_DONE|PHS_DATA_OUT:
+ case CSR_UNEXP |PHS_DATA_OUT:
+ case CSR_SRV_REQ |PHS_DATA_OUT:
+DB(DB_INTR,printk("OUT-%d.%d",cmd->SCp.this_residual,cmd->SCp.buffers_residual))
+ transfer_bytes(cmd, DATA_OUT_DIR);
+ if (hostdata->state != S_RUNNING_LEVEL2)
+ hostdata->state = S_CONNECTED;
+ break;
+
+
+/* Note: this interrupt should not occur in a LEVEL2 command */
+
+ case CSR_XFER_DONE|PHS_COMMAND:
+ case CSR_UNEXP |PHS_COMMAND:
+ case CSR_SRV_REQ |PHS_COMMAND:
+DB(DB_INTR,printk("CMND-%02x,%ld",cmd->cmnd[0],cmd->pid))
+ transfer_pio(cmd->cmnd, cmd->cmd_len, DATA_OUT_DIR, hostdata);
+ hostdata->state = S_CONNECTED;
+ break;
+
+
+ case CSR_XFER_DONE|PHS_STATUS:
+ case CSR_UNEXP |PHS_STATUS:
+ case CSR_SRV_REQ |PHS_STATUS:
+DB(DB_INTR,printk("STATUS"))
+
+ cmd->SCp.Status = read_1_byte(hostdata);
+ if (hostdata->level2 >= L2_BASIC) {
+ sr = read_3393(hostdata,WD_SCSI_STATUS); /* clear interrupt */
+ hostdata->state = S_RUNNING_LEVEL2;
+ write_3393(hostdata,WD_COMMAND_PHASE, 0x50);
+ write_3393_cmd(hostdata,WD_CMD_SEL_ATN_XFER);
+ }
+ else {
+DB(DB_INTR,printk("=%02x",cmd->SCp.Status))
+ hostdata->state = S_CONNECTED;
+ }
+ break;
+
+
+ case CSR_XFER_DONE|PHS_MESS_IN:
+ case CSR_UNEXP |PHS_MESS_IN:
+ case CSR_SRV_REQ |PHS_MESS_IN:
+DB(DB_INTR,printk("MSG_IN="))
+
+ cli();
+ msg = read_1_byte(hostdata);
+ sr = read_3393(hostdata,WD_SCSI_STATUS); /* clear interrupt */
+
+ hostdata->incoming_msg[hostdata->incoming_ptr] = msg;
+ if (hostdata->incoming_msg[0] == EXTENDED_MESSAGE)
+ msg = EXTENDED_MESSAGE;
+ else
+ hostdata->incoming_ptr = 0;
+
+ cmd->SCp.Message = msg;
+ switch (msg) {
+
+ case COMMAND_COMPLETE:
+DB(DB_INTR,printk("CCMP-%ld",cmd->pid))
+ write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK);
+ hostdata->state = S_PRE_CMP_DISC;
+ break;
+
+ case SAVE_POINTERS:
+DB(DB_INTR,printk("SDP"))
+ write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK);
+ hostdata->state = S_CONNECTED;
+ break;
+
+ case RESTORE_POINTERS:
+DB(DB_INTR,printk("RDP"))
+ if (hostdata->level2 >= L2_BASIC) {
+ write_3393(hostdata,WD_COMMAND_PHASE, 0x45);
+ write_3393_cmd(hostdata,WD_CMD_SEL_ATN_XFER);
+ hostdata->state = S_RUNNING_LEVEL2;
+ }
+ else {
+ write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK);
+ hostdata->state = S_CONNECTED;
+ }
+ break;
+
+ case DISCONNECT:
+DB(DB_INTR,printk("DIS"))
+ cmd->device->disconnect = 1;
+ write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK);
+ hostdata->state = S_PRE_TMP_DISC;
+ break;
+
+ case MESSAGE_REJECT:
+DB(DB_INTR,printk("REJ"))
+#ifdef SYNC_DEBUG
+printk("-REJ-");
+#endif
+ if (hostdata->sync_stat[cmd->target] == SS_WAITING)
+ hostdata->sync_stat[cmd->target] = SS_SET;
+ write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK);
+ hostdata->state = S_CONNECTED;
+ break;
+
+ case EXTENDED_MESSAGE:
+DB(DB_INTR,printk("EXT"))
+
+ ucp = hostdata->incoming_msg;
+
+#ifdef SYNC_DEBUG
+printk("%02x",ucp[hostdata->incoming_ptr]);
+#endif
+ /* Is this the last byte of the extended message? */
+
+ if ((hostdata->incoming_ptr >= 2) &&
+ (hostdata->incoming_ptr == (ucp[1] + 1))) {
+
+ switch (ucp[2]) { /* what's the EXTENDED code? */
+ case EXTENDED_SDTR:
+ id = calc_sync_xfer(ucp[3],ucp[4]);
+ if (hostdata->sync_stat[cmd->target] != SS_WAITING) {
+
+/* A device has sent an unsolicited SDTR message; rather than go
+ * through the effort of decoding it and then figuring out what
+ * our reply should be, we're just gonna say that we have a
+ * synchronous fifo depth of 0. This will result in asynchronous
+ * transfers - not ideal but so much easier.
+ * Actually, this is OK because it assures us that if we don't
+ * specifically ask for sync transfers, we won't do any.
+ */
+
+ write_3393_cmd(hostdata,WD_CMD_ASSERT_ATN); /* want MESS_OUT */
+ hostdata->outgoing_msg[0] = EXTENDED_MESSAGE;
+ hostdata->outgoing_msg[1] = 3;
+ hostdata->outgoing_msg[2] = EXTENDED_SDTR;
+ hostdata->outgoing_msg[3] = hostdata->default_sx_per/4;
+ hostdata->outgoing_msg[4] = 0;
+ hostdata->outgoing_len = 5;
+ hostdata->sync_xfer[cmd->target] =
+ calc_sync_xfer(hostdata->default_sx_per/4,0);
+ }
+ else {
+ hostdata->sync_xfer[cmd->target] = id;
+ }
+#ifdef SYNC_DEBUG
+printk("sync_xfer=%02x",hostdata->sync_xfer[cmd->target]);
+#endif
+ hostdata->sync_stat[cmd->target] = SS_SET;
+ write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK);
+ hostdata->state = S_CONNECTED;
+ break;
+ case EXTENDED_WDTR:
+ write_3393_cmd(hostdata,WD_CMD_ASSERT_ATN); /* want MESS_OUT */
+ printk("sending WDTR ");
+ hostdata->outgoing_msg[0] = EXTENDED_MESSAGE;
+ hostdata->outgoing_msg[1] = 2;
+ hostdata->outgoing_msg[2] = EXTENDED_WDTR;
+ hostdata->outgoing_msg[3] = 0; /* 8 bit transfer width */
+ hostdata->outgoing_len = 4;
+ write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK);
+ hostdata->state = S_CONNECTED;
+ break;
+ default:
+ write_3393_cmd(hostdata,WD_CMD_ASSERT_ATN); /* want MESS_OUT */
+ printk("Rejecting Unknown Extended Message(%02x). ",ucp[2]);
+ hostdata->outgoing_msg[0] = MESSAGE_REJECT;
+ hostdata->outgoing_len = 1;
+ write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK);
+ hostdata->state = S_CONNECTED;
+ break;
+ }
+ hostdata->incoming_ptr = 0;
+ }
+
+ /* We need to read more MESS_IN bytes for the extended message */
+
+ else {
+ hostdata->incoming_ptr++;
+ write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK);
+ hostdata->state = S_CONNECTED;
+ }
+ break;
+
+ default:
+ printk("Rejecting Unknown Message(%02x) ",msg);
+ write_3393_cmd(hostdata,WD_CMD_ASSERT_ATN); /* want MESS_OUT */
+ hostdata->outgoing_msg[0] = MESSAGE_REJECT;
+ hostdata->outgoing_len = 1;
+ write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK);
+ hostdata->state = S_CONNECTED;
+ }
+ break;
+
+
+/* Note: this interrupt will occur only after a LEVEL2 command */
+
+ case CSR_SEL_XFER_DONE:
+ cli();
+
+/* Make sure that reselection is enabled at this point - it may
+ * have been turned off for the command that just completed.
+ */
+
+ write_3393(hostdata,WD_SOURCE_ID, SRCID_ER);
+ if (phs == 0x60) {
+DB(DB_INTR,printk("SX-DONE-%ld",cmd->pid))
+ cmd->SCp.Message = COMMAND_COMPLETE;
+ lun = read_3393(hostdata,WD_TARGET_LUN);
+ if (cmd->SCp.Status == GOOD)
+ cmd->SCp.Status = lun;
+ hostdata->connected = NULL;
+ if (cmd->cmnd[0] != REQUEST_SENSE)
+ cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
+ else if (cmd->SCp.Status != GOOD)
+ cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16);
+ hostdata->busy[cmd->target] &= ~(1 << cmd->lun);
+ hostdata->state = S_UNCONNECTED;
+ cmd->scsi_done(cmd);
+
+/* We are no longer connected to a target - check to see if
+ * there are commands waiting to be executed.
+ */
+
+ sti();
+ in2000_execute(instance);
+ }
+ else {
+ printk("%02x:%02x:%02x-%ld: Unknown SEL_XFER_DONE phase!!---",asr,sr,phs,cmd->pid);
+ }
+ break;
+
+
+/* Note: this interrupt will occur only after a LEVEL2 command */
+
+ case CSR_SDP:
+DB(DB_INTR,printk("SDP"))
+ hostdata->state = S_RUNNING_LEVEL2;
+ write_3393(hostdata,WD_COMMAND_PHASE, 0x41);
+ write_3393_cmd(hostdata,WD_CMD_SEL_ATN_XFER);
+ break;
+
+
+ case CSR_XFER_DONE|PHS_MESS_OUT:
+ case CSR_UNEXP |PHS_MESS_OUT:
+ case CSR_SRV_REQ |PHS_MESS_OUT:
+DB(DB_INTR,printk("MSG_OUT="))
+
+/* To get here, we've probably requested MESSAGE_OUT and have
+ * already put the correct bytes in outgoing_msg[] and filled
+ * in outgoing_len. We simply send them out to the SCSI bus.
+ * Sometimes we get MESSAGE_OUT phase when we're not expecting
+ * it - like when our SDTR message is rejected by a target. Some
+ * targets send the REJECT before receiving all of the extended
+ * message, and then seem to go back to MESSAGE_OUT for a byte
+ * or two. Not sure why, or if I'm doing something wrong to
+ * cause this to happen. Regardless, it seems that sending
+ * NOP messages in these situations results in no harm and
+ * makes everyone happy.
+ */
+
+ if (hostdata->outgoing_len == 0) {
+ hostdata->outgoing_len = 1;
+ hostdata->outgoing_msg[0] = NOP;
+ }
+ transfer_pio(hostdata->outgoing_msg, hostdata->outgoing_len,
+ DATA_OUT_DIR, hostdata);
+DB(DB_INTR,printk("%02x",hostdata->outgoing_msg[0]))
+ hostdata->outgoing_len = 0;
+ hostdata->state = S_CONNECTED;
+ break;
+
+
+ case CSR_UNEXP_DISC:
+
+/* I think I've seen this after a request-sense that was in response
+ * to an error condition, but not sure. We certainly need to do
+ * something when we get this interrupt - the question is 'what?'.
+ * Let's think positively, and assume some command has finished
+ * in a legal manner (like a command that provokes a request-sense),
+ * so we treat it as a normal command-complete-disconnect.
+ */
+
+ cli();
+
+/* Make sure that reselection is enabled at this point - it may
+ * have been turned off for the command that just completed.
+ */
+
+ write_3393(hostdata,WD_SOURCE_ID, SRCID_ER);
+ if (cmd == NULL) {
+ printk(" - Already disconnected! ");
+ hostdata->state = S_UNCONNECTED;
+ return;
+ }
+DB(DB_INTR,printk("UNEXP_DISC-%ld",cmd->pid))
+ hostdata->connected = NULL;
+ hostdata->busy[cmd->target] &= ~(1 << cmd->lun);
+ hostdata->state = S_UNCONNECTED;
+ if (cmd->cmnd[0] != REQUEST_SENSE)
+ cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
+ else if (cmd->SCp.Status != GOOD)
+ cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16);
+ cmd->scsi_done(cmd);
+
+/* We are no longer connected to a target - check to see if
+ * there are commands waiting to be executed.
+ */
+
+ sti();
+ in2000_execute(instance);
+ break;
+
+
+ case CSR_DISC:
+ cli();
+
+/* Make sure that reselection is enabled at this point - it may
+ * have been turned off for the command that just completed.
+ */
+
+ write_3393(hostdata,WD_SOURCE_ID, SRCID_ER);
+DB(DB_INTR,printk("DISC-%ld",cmd->pid))
+ if (cmd == NULL) {
+ printk(" - Already disconnected! ");
+ hostdata->state = S_UNCONNECTED;
+ }
+ switch (hostdata->state) {
+ case S_PRE_CMP_DISC:
+ hostdata->connected = NULL;
+ hostdata->busy[cmd->target] &= ~(1 << cmd->lun);
+ hostdata->state = S_UNCONNECTED;
+ if (cmd->cmnd[0] != REQUEST_SENSE)
+ cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
+ else if (cmd->SCp.Status != GOOD)
+ cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16);
+ cmd->scsi_done(cmd);
+ break;
+ case S_PRE_TMP_DISC:
+ case S_RUNNING_LEVEL2:
+ cmd->host_scribble = (uchar *)hostdata->disconnected_Q;
+ hostdata->disconnected_Q = cmd;
+ hostdata->connected = NULL;
+ hostdata->state = S_UNCONNECTED;
+
+#ifdef PROC_INTERFACE
+ disc_taken_total++;
+#endif
+
+ break;
+ default:
+ printk("*** Unexpected DISCONNECT interrupt! ***");
+ hostdata->state = S_UNCONNECTED;
+ }
+
+/* We are no longer connected to a target - check to see if
+ * there are commands waiting to be executed.
+ */
+
+ sti();
+ in2000_execute(instance);
+ break;
+
+
+ case CSR_RESEL_AM:
+DB(DB_INTR,printk("RESEL"))
+
+ cli();
+
+ /* First we have to make sure this reselection didn't */
+ /* happen during Arbitration/Selection of some other device. */
+ /* If yes, put losing command back on top of input_Q. */
+
+ if (hostdata->level2 <= L2_NONE) {
+
+ if (hostdata->selecting) {
+ cmd = (Scsi_Cmnd *)hostdata->selecting;
+ hostdata->selecting = NULL;
+ hostdata->busy[cmd->target] &= ~(1 << cmd->lun);
+ cmd->host_scribble = (uchar *)hostdata->input_Q;
+ hostdata->input_Q = cmd;
+ }
+ }
+
+ else {
+
+ if (cmd) {
+ if (phs == 0x00) {
+ hostdata->busy[cmd->target] &= ~(1 << cmd->lun);
+ cmd->host_scribble = (uchar *)hostdata->input_Q;
+ hostdata->input_Q = cmd;
+ }
+ else {
+ printk("---%02x:%02x:%02x-TROUBLE: Intrusive ReSelect!---",asr,sr,phs);
+ while (1)
+ printk("\r");
+ }
+ }
+
+ }
+
+ /* OK - find out which device reselected us. */
+
+ id = read_3393(hostdata,WD_SOURCE_ID);
+ id &= SRCID_MASK;
+
+ /* and extract the lun from the ID message. (Note that we don't
+ * bother to check for a valid message here - I guess this is
+ * not the right way to go, but....)
+ */
+
+ lun = read_3393(hostdata,WD_DATA);
+ if (hostdata->level2 < L2_RESELECT)
+ write_3393_cmd(hostdata,WD_CMD_NEGATE_ACK);
+ lun &= 7;
+
+ /* Now we look for the command that's reconnecting. */
+
+ cmd = (Scsi_Cmnd *)hostdata->disconnected_Q;
+ patch = NULL;
+ while (cmd) {
+ if (id == cmd->target && lun == cmd->lun)
+ break;
+ patch = cmd;
+ cmd = (Scsi_Cmnd *)cmd->host_scribble;
+ }
+
+ /* Hmm. Couldn't find a valid command.... What to do? */
+
+ if (!cmd) {
+ printk("---TROUBLE: target %d.%d not in disconnect queue---",id,lun);
+ break;
+ }
+
+ /* Ok, found the command - now start it up again. */
+
+ if (patch)
+ patch->host_scribble = cmd->host_scribble;
+ else
+ hostdata->disconnected_Q = (Scsi_Cmnd *)cmd->host_scribble;
+ hostdata->connected = cmd;
+
+ /* We don't need to worry about 'initialize_SCp()' or 'hostdata->busy[]'
+ * because these things are preserved over a disconnect.
+ * But we DO need to fix the DPD bit so it's correct for this command.
+ */
+
+ if (IS_DIR_OUT(cmd))
+ write_3393(hostdata,WD_DESTINATION_ID,cmd->target);
+ else
+ write_3393(hostdata,WD_DESTINATION_ID,cmd->target | DSTID_DPD);
+ if (hostdata->level2 >= L2_RESELECT) {
+ write_3393_count(hostdata,0); /* we want a DATA_PHASE interrupt */
+ write_3393(hostdata,WD_COMMAND_PHASE, 0x45);
+ write_3393_cmd(hostdata,WD_CMD_SEL_ATN_XFER);
+ hostdata->state = S_RUNNING_LEVEL2;
+ }
+ else
+ hostdata->state = S_CONNECTED;
+
+DB(DB_INTR,printk("-%ld",cmd->pid))
+ break;
+
+ default:
+ printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--",asr,sr,phs);
+ }
+
+ write1_io(0, IO_LED_OFF);
+ restore_flags(flags);
+
+DB(DB_INTR,printk("} "))
- /* Bit 2 tells us if interrupts are disabled */
- if ( (tmp & 0x4) == 0 ) {
- printk("The IN-2000 is not configured for interrupt operation\n");
- printk("Change the DIP switch settings to enable interrupt operation\n");
- }
-
- /* Bit 6 tells us about floppy controller */
- printk("IN-2000 probe found floppy controller on IN-2000 ");
- if ( (tmp & 0x40) == 0)
- printk("enabled\n");
- else
- printk("disabled\n");
-
- /* Bit 5 tells us about synch/asynch mode */
- printk("IN-2000 probe found IN-2000 in ");
- if ( (tmp & 0x20) == 0)
- printk("synchronous mode\n");
- else
- printk("asynchronous mode\n");
-
- irq_level = int_tab [ ((~inb(INFLED)>>3)&0x3) ];
-
- printk("Configuring IN2000 at IO:%x, IRQ %d"
-#ifdef FAST_FIFO_IO
- " (using fast FIFO I/O code)"
-#endif
- "\n",base, irq_level);
-
- outb(2,ININTR); /* Shut off the FIFO first, so it won't ask for data.*/
- if (request_irq(irq_level,in2000_intr_handle, 0, "in2000", NULL))
- {
- printk("in2000_detect: Unable to allocate IRQ.\n");
- return 0;
- }
- outb(0,INFWRT); /* read mode so WD can intrpt */
- outb(SCSIST,INSTAT);
- inb(INDATA); /* free status reg, clear WD intrpt */
- outb(OWNID,INSTAT);
- outb(0x7,INDATA); /* we use addr 7 */
- outb(COMMAND,INSTAT);
- outb(0,INDATA); /* do chip reset */
- shpnt = scsi_register(tpnt, 0);
- /* Set these up so that we can unload the driver properly. */
- shpnt->io_port = base;
- shpnt->n_io_port = 12;
- shpnt->irq = irq_level;
- request_region(base, 12,"in2000"); /* Prevent other drivers from using this space */
- return 1;
}
-int in2000_abort(Scsi_Cmnd * SCpnt)
+
+
+#define RESET_CARD 0
+#define RESET_CARD_AND_BUS 1
+#define B_FLAG 0x80
+
+int reset_hardware(struct Scsi_Host *instance, int type)
{
- DEB(printk("in2000_abort\n"));
- /*
- * Ask no stupid questions, just order the abort.
- */
- outb(COMMAND,INSTAT);
- outb(1,INDATA); /* Abort Command */
- return 0;
+struct IN2000_hostdata *hostdata;
+int qt,x;
+unsigned long flags;
+
+ hostdata = (struct IN2000_hostdata *)instance->hostdata;
+
+ write1_io(0, IO_LED_ON);
+ if (type == RESET_CARD_AND_BUS) {
+ write1_io(0,IO_CARD_RESET);
+ x = read1_io(IO_HARDWARE);
+ }
+ x = read_3393(hostdata,WD_SCSI_STATUS); /* clear any WD intrpt */
+ write_3393(hostdata,WD_OWN_ID, instance->this_id |
+ OWNID_EAF | OWNID_RAF | OWNID_FS_8);
+ write_3393(hostdata,WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
+ write_3393(hostdata,WD_SYNCHRONOUS_TRANSFER,
+ calc_sync_xfer(hostdata->default_sx_per/4,DEFAULT_SX_OFF));
+ save_flags(flags);
+ cli();
+ write1_io(0,IO_FIFO_WRITE); /* clear fifo counter */
+ write1_io(0,IO_FIFO_READ); /* start fifo out in read mode */
+ write_3393(hostdata,WD_COMMAND, WD_CMD_RESET);
+ while (!(READ_AUX_STAT() & ASR_INT))
+ ; /* wait for RESET to complete */
+
+ x = read_3393(hostdata,WD_SCSI_STATUS); /* clear interrupt */
+ restore_flags(flags);
+ write_3393(hostdata,WD_QUEUE_TAG,0xa5); /* any random number */
+ qt = read_3393(hostdata,WD_QUEUE_TAG);
+ if (qt == 0xa5) {
+ x |= B_FLAG;
+ write_3393(hostdata,WD_QUEUE_TAG,0);
+ }
+ write_3393(hostdata,WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE);
+ write_3393(hostdata,WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
+ write1_io(0, IO_LED_OFF);
+ return x;
}
-static inline void delay( unsigned how_long )
+
+
+#if LINUX_VERSION_CODE >= 0x010359 /* 1.3.89 */
+int in2000_reset(Scsi_Cmnd *cmd, unsigned int reset_flags)
+#else
+int in2000_reset(Scsi_Cmnd *cmd)
+#endif
{
- unsigned long time = jiffies + how_long;
- while (jiffies < time) ;
+unsigned long flags;
+struct Scsi_Host *instance;
+struct IN2000_hostdata *hostdata;
+int x;
+
+ instance = cmd->host;
+ hostdata = (struct IN2000_hostdata *)instance->hostdata;
+
+ printk("scsi%d: Reset. ", instance->host_no);
+ save_flags(flags);
+ cli();
+
+ /* do scsi-reset here */
+
+ reset_hardware(instance, RESET_CARD_AND_BUS);
+ for (x = 0; x < 8; x++) {
+ hostdata->busy[x] = 0;
+ hostdata->sync_xfer[x] = calc_sync_xfer(DEFAULT_SX_PER/4,DEFAULT_SX_OFF);
+ hostdata->sync_stat[x] = SS_UNSET; /* using default sync values */
+ }
+ hostdata->input_Q = NULL;
+ hostdata->selecting = NULL;
+ hostdata->connected = NULL;
+ hostdata->disconnected_Q = NULL;
+ hostdata->state = S_UNCONNECTED;
+ hostdata->fifo = FI_FIFO_UNUSED;
+ hostdata->incoming_ptr = 0;
+ hostdata->outgoing_len = 0;
+
+ cmd->result = DID_RESET << 16;
+ restore_flags(flags);
+ return 0;
}
-int in2000_reset(Scsi_Cmnd * SCpnt)
+
+
+int in2000_abort (Scsi_Cmnd *cmd)
{
- DEB(printk("in2000_reset called\n"));
- /*
- * Note: this is finished off by an incoming interrupt
- */
- outb(0,INFWRT); /* read mode so WD can intrpt */
- outb(SCSIST,INSTAT);
- inb(INDATA);
- outb(OWNID,INSTAT);
- outb(0x7,INDATA); /* ID=7,noadv, no parity, clk div=2 (8-10Mhz clk) */
- outb(COMMAND,INSTAT);
- outb(0,INDATA); /* reset WD chip */
- delay(2);
-#ifdef SCSI_RESET_PENDING
- return SCSI_RESET_PENDING;
+struct Scsi_Host *instance;
+struct IN2000_hostdata *hostdata;
+Scsi_Cmnd *tmp, *prev;
+unsigned long flags;
+uchar sr, asr;
+unsigned long timeout;
+
+ save_flags (flags);
+ cli();
+
+ instance = cmd->host;
+ hostdata = (struct IN2000_hostdata *)instance->hostdata;
+
+ printk ("scsi%d: Abort-", instance->host_no);
+ printk("(asr=%02x,count=%ld,resid=%d,buf_resid=%d,have_data=%d,FC=%02x)- ",
+ READ_AUX_STAT(),read_3393_count(hostdata),cmd->SCp.this_residual,cmd->SCp.buffers_residual,
+ cmd->SCp.have_data_in,read1_io(IO_FIFO_COUNT));
+
+/*
+ * Case 1 : If the command hasn't been issued yet, we simply remove it
+ * from the inout_Q.
+ */
+
+ tmp = (Scsi_Cmnd *)hostdata->input_Q;
+ prev = 0;
+ while (tmp) {
+ if (tmp == cmd) {
+ if (prev)
+ prev->host_scribble = cmd->host_scribble;
+ cmd->host_scribble = NULL;
+ cmd->result = DID_ABORT << 16;
+ printk("scsi%d: Abort - removing command %ld from input_Q. ",
+ instance->host_no, cmd->pid);
+ cmd->scsi_done(cmd);
+ restore_flags(flags);
+ return SCSI_ABORT_SUCCESS;
+ }
+ prev = tmp;
+ tmp = (Scsi_Cmnd *)tmp->host_scribble;
+ }
+
+/*
+ * Case 2 : If the command is connected, we're going to fail the abort
+ * and let the high level SCSI driver retry at a later time or
+ * issue a reset.
+ *
+ * Timeouts, and therefore aborted commands, will be highly unlikely
+ * and handling them cleanly in this situation would make the common
+ * case of noresets less efficient, and would pollute our code. So,
+ * we fail.
+ */
+
+ if (hostdata->connected == cmd) {
+
+ printk("scsi%d: Aborting connected command %ld - ",
+ instance->host_no, cmd->pid);
+
+ printk("sending wd33c93 ABORT command - ");
+ write_3393(hostdata, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
+ write_3393_cmd(hostdata, WD_CMD_ABORT);
+
+/* Now we have to attempt to flush out the FIFO... */
+
+ printk("flushing fifo - ");
+ timeout = 1000000;
+ do {
+ asr = READ_AUX_STAT();
+ if (asr & ASR_DBR)
+ read_3393(hostdata, WD_DATA);
+ } while (!(asr & ASR_INT) && timeout-- > 0);
+ sr = read_3393(hostdata, WD_SCSI_STATUS);
+ printk("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ",
+ asr, sr, read_3393_count(hostdata), timeout);
+
+ /*
+ * Abort command processed.
+ * Still connected.
+ * We must disconnect.
+ */
+
+ printk("sending wd33c93 DISCONNECT command - ");
+ write_3393_cmd(hostdata, WD_CMD_DISCONNECT);
+
+ timeout = 1000000;
+ asr = READ_AUX_STAT();
+ while ((asr & ASR_CIP) && timeout-- > 0)
+ asr = READ_AUX_STAT();
+ sr = read_3393(hostdata, WD_SCSI_STATUS);
+ printk("asr=%02x, sr=%02x.",asr,sr);
+
+ hostdata->busy[cmd->target] &= ~(1 << cmd->lun);
+ hostdata->connected = NULL;
+ hostdata->state = S_UNCONNECTED;
+ cmd->result = DID_ABORT << 16;
+ cmd->scsi_done(cmd);
+
+/* sti();*/
+ in2000_execute (instance);
+
+ restore_flags(flags);
+ return SCSI_ABORT_SUCCESS;
+ }
+
+/*
+ * Case 3: If the command is currently disconnected from the bus,
+ * we're not going to expend much effort here: Let's just return
+ * an ABORT_SNOOZE and hope for the best...
+ */
+
+ for (tmp=(Scsi_Cmnd *)hostdata->disconnected_Q; tmp;
+ tmp=(Scsi_Cmnd *)tmp->host_scribble)
+ if (cmd == tmp) {
+ restore_flags(flags);
+ printk("Sending ABORT_SNOOZE. ");
+ return SCSI_ABORT_SNOOZE;
+ }
+
+/*
+ * Case 4 : If we reached this point, the command was not found in any of
+ * the queues.
+ *
+ * We probably reached this point because of an unlikely race condition
+ * between the command completing successfully and the abortion code,
+ * so we won't panic, but we will notify the user in case somethign really
+ * broke.
+ */
+
+/* sti();*/
+ in2000_execute (instance);
+
+ restore_flags(flags);
+ printk("scsi%d: warning : SCSI command probably completed successfully"
+ " before abortion. ", instance->host_no);
+ return SCSI_ABORT_NOT_RUNNING;
+}
+
+
+
+#define MAX_IN2000_HOSTS 3
+#define MAX_SETUP_STRINGS (sizeof(setup_strings) / sizeof(char *))
+#define SETUP_BUFFER_SIZE 200
+static char setup_buffer[SETUP_BUFFER_SIZE];
+static char setup_used[MAX_SETUP_STRINGS];
+
+void in2000_setup (char *str, int *ints)
+{
+int i;
+char *p1,*p2;
+
+ strncpy(setup_buffer,str,SETUP_BUFFER_SIZE);
+ setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0';
+ p1 = setup_buffer;
+ i = 0;
+ while (*p1 && (i < MAX_SETUP_STRINGS)) {
+ p2 = strchr(p1, ',');
+ if (p2) {
+ *p2 = '\0';
+ if (p1 != p2)
+ setup_strings[i] = p1;
+ p1 = p2 + 1;
+ i++;
+ }
+ else {
+ setup_strings[i] = p1;
+ break;
+ }
+ }
+ for (i=0; i<MAX_SETUP_STRINGS; i++)
+ setup_used[i] = 0;
+}
+
+
+/* check_setup_strings() returns index if key found, 0 if not
+ */
+
+int check_setup_strings(char *key, int *flags, int *val, char *buf)
+{
+int x;
+char *cp;
+
+ for (x=0; x<MAX_SETUP_STRINGS; x++) {
+ if (setup_used[x])
+ continue;
+ if (!strncmp(setup_strings[x], key, strlen(key)))
+ break;
+ }
+ if (x == MAX_SETUP_STRINGS)
+ return 0;
+ setup_used[x] = 1;
+ cp = setup_strings[x] + strlen(key);
+ *val = -1;
+ if (*cp != ':')
+ return ++x;
+ cp++;
+ if ((*cp >= '0') && (*cp <= '9')) {
+ *val = simple_strtoul(cp,NULL,0);
+ }
+ return ++x;
+}
+
+
+
+#if LINUX_VERSION_CODE >= 0x010300
+#include <linux/stat.h>
+struct proc_dir_entry proc_scsi_in2000 = {
+ PROC_SCSI_IN2000, 6, "in2000",
+ S_IFDIR | S_IRUGO | S_IXUGO, 2
+ };
+#endif
+
+
+const unsigned int *bios_tab[] = {
+ (unsigned int *)0xc8000,
+ (unsigned int *)0xd0000,
+ (unsigned int *)0xd8000,
+ 0
+ };
+
+const unsigned short base_tab[] = {
+ 0x220,
+ 0x200,
+ 0x110,
+ 0x100,
+ };
+
+const int int_tab[] = {
+ 15,
+ 14,
+ 11,
+ 10
+ };
+
+int in2000_detect(Scsi_Host_Template * tpnt)
+{
+struct Scsi_Host *instance;
+struct IN2000_hostdata *hostdata;
+int detect_count;
+int bios;
+int x;
+unsigned short base;
+uchar switches;
+uchar hrev;
+int flags;
+int val;
+char buf[32];
+
+/* Thanks to help from Bill Earnest, probing for IN2000 cards is a
+ * pretty straightforward and fool-proof operation. We do require
+ * that cards have their BIOS enabled, although I hope to be able
+ * to detect and use BIOS-less cards in the future. There are 3
+ * possible locations for the IN2000 EPROM in memory space - if we
+ * find a BIOS signature, we can read the dip switch settings from
+ * the byte at BIOS+32 (shadowed in by logic on the card). From 2
+ * of the switch bits we get the card's address in IO space. There's
+ * an image of the dip switch there, also, so we have a way to back-
+ * check that this really is an IN2000 card. Very nifty.
+ *
+ * There have been a couple of BIOS versions with different layouts
+ * for the obvious ID strings. We look for the 2 most common ones and
+ * hope that they cover all the cases...
+ */
+
+ detect_count = 0;
+ for (bios = 0; bios_tab[bios]; bios++) {
+ if (check_setup_strings("ioport",&flags,&val,buf)) {
+ base = val;
+ switches = ~inb(base + IO_SWITCHES) & 0xff;
+ printk("Forcing detection at IOport 0x%x.\n",base);
+ bios = 2;
+ }
+ else if (*(bios_tab[bios]+0x04) == 0x41564f4e ||
+ *(bios_tab[bios]+0x0c) == 0x61776c41) {
+ printk("Found IN2000 BIOS at 0x%x.\n",(unsigned int)bios_tab[bios]);
+
+/* Read the switch image that's mapped into EPROM space */
+
+ switches = ~((*(bios_tab[bios]+0x08) & 0xff));
+
+/* Find out where the IO space is */
+
+ x = switches & (SW_ADDR0 | SW_ADDR1);
+ base = base_tab[x];
+
+/* Check for the IN2000 signature in IO space. */
+
+ x = ~inb(base + IO_SWITCHES) & 0xff;
+ if (x != switches) {
+ printk("Bad IO signature: %02x vs %02x\n",x,switches);
+ continue;
+ }
+ }
+ else
+ continue;
+
+/* OK. We have a base address for the IO ports - run a few safety checks */
+
+ if (!(switches & SW_BIT7)) { /* I _think_ all cards do this */
+ printk("There is no IN-2000 SCSI card at IOport 0x%03x!\n",base);
+ continue;
+ }
+
+/* Let's expect only known legal hardware version here. There
+ * can't be THAT many of them, and it's easy to add new ones
+ * as we hear about them.
+ */
+
+ hrev = inb(base + IO_HARDWARE);
+ if ((hrev != 0x27) && (hrev != 0x26) && (hrev != 0x25)) {
+ printk("The IN-2000 SCSI card at IOport 0x%03x ",base);
+ printk("has unknown version %02x hardware - ",hrev);
+ printk("Sorry, cancelling detection.\n");
+ continue;
+ }
+
+ /* Bit 2 tells us if interrupts are disabled */
+ if (switches & SW_DISINT) {
+ printk("The IN-2000 SCSI card at IOport 0x%03x ",base);
+ printk("is not configured for interrupt operation!\n");
+ printk("This driver requires an interrupt: cancelling detection.\n");
+ continue;
+ }
+
+/* Ok. We accept that there's an IN2000 at ioaddr 'base'. Now
+ * initialize it.
+ */
+
+#if LINUX_VERSION_CODE >= 0x010300
+ tpnt->proc_dir = &proc_scsi_in2000; /* done more than once? harmless. */
+#endif
+
+ detect_count++;
+ instance = scsi_register(tpnt, sizeof(struct IN2000_hostdata));
+ if (!instance_list)
+ instance_list = instance;
+ hostdata = (struct IN2000_hostdata *)instance->hostdata;
+ instance->io_port = hostdata->io_base = base;
+ hostdata->dip_switch = switches;
+ hostdata->hrev = hrev;
+
+ write1_io(0,IO_FIFO_WRITE); /* clear fifo counter */
+ write1_io(0,IO_FIFO_READ); /* start fifo out in read mode */
+ write1_io(0,IO_INTR_MASK); /* allow all ints */
+ x = int_tab[(switches & (SW_INT0 | SW_INT1)) >> SW_INT_SHIFT];
+
+#if LINUX_VERSION_CODE >= 0x010346 /* 1.3.70 */
+ if (request_irq(x, in2000_intr, SA_INTERRUPT, "in2000", NULL)) {
#else
- if(SCpnt) SCpnt->flags |= NEEDS_JUMPSTART;
- return 0;
+ if (request_irq(x, in2000_intr, SA_INTERRUPT, "in2000")) {
+#endif
+ printk("in2000_detect: Unable to allocate IRQ.\n");
+ detect_count--;
+ continue;
+ }
+ instance->irq = x;
+ instance->n_io_port = 13;
+ request_region(base, 13, "in2000"); /* lock in this IO space for our use */
+
+ for (x = 0; x < 8; x++) {
+ hostdata->busy[x] = 0;
+ hostdata->sync_xfer[x] = calc_sync_xfer(DEFAULT_SX_PER/4,DEFAULT_SX_OFF);
+ hostdata->sync_stat[x] = SS_UNSET; /* using default sync values */
+ }
+ hostdata->input_Q = NULL;
+ hostdata->selecting = NULL;
+ hostdata->connected = NULL;
+ hostdata->disconnected_Q = NULL;
+ hostdata->state = S_UNCONNECTED;
+ hostdata->fifo = FI_FIFO_UNUSED;
+ hostdata->level2 = L2_BASIC;
+ hostdata->disconnect = DIS_ADAPTIVE;
+ hostdata->args = DEBUG_DEFAULTS;
+ hostdata->incoming_ptr = 0;
+ hostdata->outgoing_len = 0;
+ hostdata->default_sx_per = DEFAULT_SX_PER;
+
+/* Older BIOS's had a 'sync on/off' switch - use its setting */
+
+ if (*(bios_tab[bios]+0x04) == 0x41564f4e && (switches & SW_SYNC_DOS5))
+ hostdata->sync_off = 0x00; /* sync defaults to on */
+ else
+ hostdata->sync_off = 0xff; /* sync defaults to off */
+
+ hostdata->proc = PR_VERSION|PR_INFO|PR_TOTALS|
+ PR_CONNECTED|PR_INPUTQ|PR_DISCQ|
+ PR_STOP;
+
+#ifdef PROC_INTERFACE
+ disc_allowed_total = 0;
+ disc_taken_total = 0;
+#endif
+
+
+ if (check_setup_strings("nosync",&flags,&val,buf))
+ hostdata->sync_off = val;
+
+ if (check_setup_strings("period",&flags,&val,buf))
+ hostdata->default_sx_per = sx_table[round_period((unsigned int)val)].period_ns;
+
+ if (check_setup_strings("disconnect",&flags,&val,buf)) {
+ if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS))
+ hostdata->disconnect = val;
+ else
+ hostdata->disconnect = DIS_ADAPTIVE;
+ }
+
+ if (check_setup_strings("noreset",&flags,&val,buf))
+ hostdata->args ^= A_NO_SCSI_RESET;
+
+ if (check_setup_strings("debug",&flags,&val,buf))
+ hostdata->args = (val & DB_MASK);
+
+ while (check_setup_strings("proc",&flags,&val,buf))
+ hostdata->proc = val;
+
+ x = reset_hardware(instance,(hostdata->args & A_NO_SCSI_RESET)?RESET_CARD:RESET_CARD_AND_BUS);
+
+ hostdata->microcode = read_3393(hostdata,WD_CDB_1);
+ if (x & 0x01) {
+ if (x & B_FLAG)
+ hostdata->chip = C_WD33C93B;
+ else
+ hostdata->chip = C_WD33C93A;
+ }
+ else
+ hostdata->chip = C_WD33C93;
+
+ printk("in2000-%d: dip_switch=%02x: irq=%d ioport=%02x floppy=%s sync/DOS5=%s\n",
+ instance->host_no,(switches & 0x7f),
+ instance->irq,hostdata->io_base,
+ (switches & SW_FLOPPY)?"Yes":"No",
+ (switches & SW_SYNC_DOS5)?"Yes":"No");
+ printk("in2000-%d: hardware_ver=%02x chip=%s microcode=%02x\n",
+ instance->host_no,hrev,
+ (hostdata->chip==C_WD33C93)?"WD33c93":
+ (hostdata->chip==C_WD33C93A)?"WD33c93A":
+ (hostdata->chip==C_WD33C93B)?"WD33c93B":"unknown",
+ hostdata->microcode);
+#ifdef DEBUGGING_ON
+ printk("in2000-%d: setup_strings = ",instance->host_no);
+ for (x=0; x<8; x++)
+ printk("%s,",setup_strings[x]);
+ printk("\n");
#endif
+ if (hostdata->sync_off == 0xff)
+ printk("in2000-%d: Sync-transfer DISABLED on all devices: ENABLE from command-line\n",instance->host_no);
+ printk("in2000-%d: driver version %s - %s\n",instance->host_no,
+ IN2000_VERSION,IN2000_DATE);
+ }
+
+ return detect_count;
}
-int in2000_biosparam(Disk * disk, kdev_t dev, int* iinfo)
- {
- int size = disk->capacity;
- DEB(printk("in2000_biosparam\n"));
- iinfo[0] = 64;
- iinfo[1] = 32;
- iinfo[2] = size >> 11;
+
+/* NOTE: I lifted this function straight out of the old driver,
+ * and have not tested it. Presumably it does what it's
+ * supposed to do...
+ */
+
+#if LINUX_VERSION_CODE >= 0x010300
+int in2000_biosparam(Disk *disk, kdev_t dev, int *iinfo)
+#else
+int in2000_biosparam(Disk *disk, int dev, int *iinfo)
+#endif
+{
+int size;
+
+ size = disk->capacity;
+ iinfo[0] = 64;
+ iinfo[1] = 32;
+ iinfo[2] = size >> 11;
+
/* This should approximate the large drive handling that the DOS ASPI manager
uses. Drives very near the boundaries may not be handled correctly (i.e.
near 2.0 Gb and 4.0 Gb) */
- if (iinfo[2] > 1024) {
- iinfo[0] = 64;
- iinfo[1] = 63;
- iinfo[2] = disk->capacity / (iinfo[0] * iinfo[1]);
- }
- if (iinfo[2] > 1024) {
- iinfo[0] = 128;
- iinfo[1] = 63;
- iinfo[2] = disk->capacity / (iinfo[0] * iinfo[1]);
- }
- if (iinfo[2] > 1024) {
- iinfo[0] = 255;
- iinfo[1] = 63;
- iinfo[2] = disk->capacity / (iinfo[0] * iinfo[1]);
- if (iinfo[2] > 1023)
- iinfo[2] = 1023;
- }
+
+ if (iinfo[2] > 1024) {
+ iinfo[0] = 64;
+ iinfo[1] = 63;
+ iinfo[2] = disk->capacity / (iinfo[0] * iinfo[1]);
+ }
+ if (iinfo[2] > 1024) {
+ iinfo[0] = 128;
+ iinfo[1] = 63;
+ iinfo[2] = disk->capacity / (iinfo[0] * iinfo[1]);
+ }
+ if (iinfo[2] > 1024) {
+ iinfo[0] = 255;
+ iinfo[1] = 63;
+ iinfo[2] = disk->capacity / (iinfo[0] * iinfo[1]);
+ if (iinfo[2] > 1023)
+ iinfo[2] = 1023;
+ }
return 0;
- }
+}
+
+
+int in2000_proc_info(char *buf, char **start, off_t off, int len, int hn, int in)
+{
+
+#ifdef PROC_INTERFACE
+
+char *bp;
+char tbuf[128];
+unsigned long flags;
+struct Scsi_Host *instance;
+struct IN2000_hostdata *hd;
+Scsi_Cmnd *cmd;
+int x,i;
+static int stop = 0;
+
+ for (instance=instance_list; instance; instance=instance->next) {
+ if (instance->host_no == hn)
+ break;
+ }
+ if (!instance) {
+ printk("*** Hmm... Can't find host #%d!\n",hn);
+ return (-ESRCH);
+ }
+ hd = (struct IN2000_hostdata *)instance->hostdata;
+
+/* If 'in' is TRUE we need to _read_ the proc file. We accept the following
+ * keywords (same format as command-line, but only ONE per read):
+ * debug
+ * disconnect
+ * period
+ * resync
+ * proc
+ */
+
+ if (in) {
+ buf[len] = '\0';
+ bp = buf;
+ if (!strncmp(bp,"debug:",6)) {
+ bp += 6;
+ hd->args = simple_strtoul(bp,NULL,0) & DB_MASK;
+ }
+ else if (!strncmp(bp,"disconnect:",11)) {
+ bp += 11;
+ x = simple_strtoul(bp,NULL,0);
+ if (x < DIS_NEVER || x > DIS_ALWAYS)
+ x = DIS_ADAPTIVE;
+ hd->disconnect = x;
+ }
+ else if (!strncmp(bp,"period:",7)) {
+ bp += 7;
+ x = simple_strtoul(bp,NULL,0);
+ hd->default_sx_per = sx_table[round_period((unsigned int)x)].period_ns;
+ }
+ else if (!strncmp(bp,"resync:",7)) {
+ bp += 7;
+ x = simple_strtoul(bp,NULL,0);
+ for (i=0; i<7; i++)
+ if (x & (1<<i))
+ hd->sync_stat[i] = SS_UNSET;
+ }
+ else if (!strncmp(bp,"proc:",5)) {
+ bp += 5;
+ hd->proc = simple_strtoul(bp,NULL,0);
+ }
+ return len;
+ }
+
+ save_flags(flags);
+ cli();
+ bp = buf;
+ *bp = '\0';
+ if (hd->proc & PR_VERSION) {
+ sprintf(tbuf,"\nVersion %s - %s. Compiled %s %s",
+ IN2000_VERSION,IN2000_DATE,__DATE__,__TIME__);
+ strcat(bp,tbuf);
+ }
+ if (hd->proc & PR_INFO) {
+ sprintf(tbuf,"\ndip_switch=%02x: irq=%d io=%02x floppy=%s sync/DOS5=%s",
+ (hd->dip_switch & 0x7f), instance->irq, hd->io_base,
+ (hd->dip_switch & 0x40)?"Yes":"No",
+ (hd->dip_switch & 0x20)?"Yes":"No");
+ strcat(bp,tbuf);
+ }
+ if (hd->proc & PR_TOTALS) {
+ sprintf(tbuf,"\n%ld disc_allowed, %ld disc_taken",
+ disc_allowed_total,disc_taken_total);
+ strcat(bp,tbuf);
+ }
+ if (hd->proc & PR_CONNECTED) {
+ strcat(bp,"\nconnected: ");
+ if (hd->connected) {
+ cmd = (Scsi_Cmnd *)hd->connected;
+ sprintf(tbuf," %ld-%d:%d(%02x)",
+ cmd->pid, cmd->target, cmd->lun, cmd->cmnd[0]);
+ strcat(bp,tbuf);
+ }
+ }
+ if (hd->proc & PR_INPUTQ) {
+ strcat(bp,"\ninput_Q: ");
+ cmd = (Scsi_Cmnd *)hd->input_Q;
+ while (cmd) {
+ sprintf(tbuf," %ld-%d:%d(%02x)",
+ cmd->pid, cmd->target, cmd->lun, cmd->cmnd[0]);
+ strcat(bp,tbuf);
+ cmd = (Scsi_Cmnd *)cmd->host_scribble;
+ }
+ }
+ if (hd->proc & PR_DISCQ) {
+ strcat(bp,"\ndisconnected_Q:");
+ cmd = (Scsi_Cmnd *)hd->disconnected_Q;
+ while (cmd) {
+ sprintf(tbuf," %ld-%d:%d(%02x)",
+ cmd->pid, cmd->target, cmd->lun, cmd->cmnd[0]);
+ strcat(bp,tbuf);
+ cmd = (Scsi_Cmnd *)cmd->host_scribble;
+ }
+ }
+ if (hd->proc & PR_TEST) {
+ ; /* insert your own custom function here */
+ }
+ strcat(bp,"\n");
+ restore_flags(flags);
+ *start = buf;
+ if (stop) {
+ stop = 0;
+ return 0; /* return 0 to signal end-of-file */
+ }
+ if (off > 0x40000) /* ALWAYS stop after 256k bytes have been read */
+ stop = 1;;
+ if (hd->proc & PR_STOP) /* stop every other time */
+ stop = 1;
+ return strlen(bp);
+
+#else /* PROC_INTERFACE */
+
+ return 0;
+
+#endif /* PROC_INTERFACE */
+
+}
+
#ifdef MODULE
-/* Eventually this will go into an include file, but this will be later */
+
Scsi_Host_Template driver_template = IN2000;
#include "scsi_module.c"
+
#endif
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov
with Sam's (original) version of this