Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/scsi/wd33c93.c b/drivers/scsi/wd33c93.c
new file mode 100644
index 0000000..5754445
--- /dev/null
+++ b/drivers/scsi/wd33c93.c
@@ -0,0 +1,2077 @@
+/*
+ * 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 from Linux-PC
+ * provided much of the inspiration and some of the code for this
+ * driver. Everything I know about Amiga DMA was gleaned from careful
+ * reading of Hamish Mcdonald's original wd33c93 driver; in fact, I
+ * borrowed shamelessly from all over that source. Thanks Hamish!
+ *
+ * _This_ driver is (I feel) an improvement over the old one in
+ * several respects:
+ *
+ * - 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
+ * call '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 of
+ * a few devices that choke after telling the driver that
+ * they can do sync transfers, we don't automatically use
+ * this faster protocol - it can be enabled via the command-
+ * line on a device-by-device basis.
+ *
+ * - Runtime operating parameters can now be specified through
+ * the 'amiboot' or the 'insmod' command line. For amiboot do:
+ * "amiboot [usual stuff] wd33c93=blah,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.
+ *
+ *
+ * TODO:
+ * more speed. linked commands.
+ *
+ *
+ * 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".
+ *
+ * Updates:
+ *
+ * Added support for pre -A chips, which don't have advanced features
+ * and will generate CSR_RESEL rather than CSR_RESEL_AM.
+ * Richard Hirst <richard@sleepie.demon.co.uk> August 2000
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <asm/irq.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+
+#include "wd33c93.h"
+
+
+#define WD33C93_VERSION "1.26"
+#define WD33C93_DATE "22/Feb/2003"
+
+MODULE_AUTHOR("John Shifflett");
+MODULE_DESCRIPTION("Generic WD33C93 SCSI driver");
+MODULE_LICENSE("GPL");
+
+/*
+ * 'setup_strings' is a single string used to pass operating parameters and
+ * settings from the kernel/module command-line to the driver. 'setup_args[]'
+ * is an array of strings that define the compile-time default values for
+ * these settings. If Linux boots with an amiboot or insmod command-line,
+ * those settings are combined with 'setup_args[]'. Note that amiboot
+ * command-lines are prefixed with "wd33c93=" while insmod uses a
+ * "setup_strings=" prefix. The driver recognizes the following keywords
+ * (lower case required) and arguments:
+ *
+ * - nosync:bitmask -bitmask is a byte where the 1st 7 bits correspond with
+ * the 7 possible SCSI devices. Set a bit to negotiate for
+ * asynchronous transfers on that device. To maintain
+ * backwards compatibility, a command-line such as
+ * "wd33c93=255" will be automatically translated to
+ * "wd33c93=nosync:0xff".
+ * - nodma:x -x = 1 to disable DMA, x = 0 to enable it. Argument is
+ * optional - if not present, same as "nodma:1".
+ * - 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 bit mask that causes
+ * various types of debug output to printed - see the DB_xxx
+ * defines in wd33c93.h
+ * - clock:x -x = clock input in MHz for WD33c93 chip. Normal values
+ * would be from 8 through 20. Default is 8.
+ * - next -No argument. Used to separate blocks of keywords when
+ * there's more than one host adapter in the system.
+ *
+ * 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.
+ * - A keyword in the 'nth' comma-separated command-line member will overwrite
+ * the 'nth' element of setup_args[]. A blank command-line member (in
+ * other words, a comma with no preceding keyword) will _not_ overwrite
+ * the corresponding setup_args[] element.
+ * - If a keyword is used more than once, the first one applies to the first
+ * SCSI host found, the second to the second card, etc, unless the 'next'
+ * keyword is used to change the order.
+ *
+ * Some amiboot examples (for insmod, use 'setup_strings' instead of 'wd33c93'):
+ * - wd33c93=nosync:255
+ * - wd33c93=nodma
+ * - wd33c93=nodma:1
+ * - wd33c93=disconnect:2,nosync:0x08,period:250
+ * - wd33c93=debug:0x1c
+ */
+
+/* Normally, no defaults are specified */
+static char *setup_args[] = { "", "", "", "", "", "", "", "", "" };
+
+static char *setup_strings;
+module_param(setup_strings, charp, 0);
+
+static void wd33c93_execute(struct Scsi_Host *instance);
+
+#ifdef CONFIG_WD33C93_PIO
+static inline uchar
+read_wd33c93(const wd33c93_regs regs, uchar reg_num)
+{
+ uchar data;
+
+ outb(reg_num, regs.SASR);
+ data = inb(regs.SCMD);
+ return data;
+}
+
+static inline unsigned long
+read_wd33c93_count(const wd33c93_regs regs)
+{
+ unsigned long value;
+
+ outb(WD_TRANSFER_COUNT_MSB, regs.SASR);
+ value = inb(regs.SCMD) << 16;
+ value |= inb(regs.SCMD) << 8;
+ value |= inb(regs.SCMD);
+ return value;
+}
+
+static inline uchar
+read_aux_stat(const wd33c93_regs regs)
+{
+ return inb(regs.SASR);
+}
+
+static inline void
+write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value)
+{
+ outb(reg_num, regs.SASR);
+ outb(value, regs.SCMD);
+}
+
+static inline void
+write_wd33c93_count(const wd33c93_regs regs, unsigned long value)
+{
+ outb(WD_TRANSFER_COUNT_MSB, regs.SASR);
+ outb((value >> 16) & 0xff, regs.SCMD);
+ outb((value >> 8) & 0xff, regs.SCMD);
+ outb( value & 0xff, regs.SCMD);
+}
+
+#define write_wd33c93_cmd(regs, cmd) \
+ write_wd33c93((regs), WD_COMMAND, (cmd))
+
+static inline void
+write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[])
+{
+ int i;
+
+ outb(WD_CDB_1, regs.SASR);
+ for (i=0; i<len; i++)
+ outb(cmnd[i], regs.SCMD);
+}
+
+#else /* CONFIG_WD33C93_PIO */
+static inline uchar
+read_wd33c93(const wd33c93_regs regs, uchar reg_num)
+{
+ *regs.SASR = reg_num;
+ mb();
+ return (*regs.SCMD);
+}
+
+static unsigned long
+read_wd33c93_count(const wd33c93_regs regs)
+{
+ unsigned long value;
+
+ *regs.SASR = WD_TRANSFER_COUNT_MSB;
+ mb();
+ value = *regs.SCMD << 16;
+ value |= *regs.SCMD << 8;
+ value |= *regs.SCMD;
+ mb();
+ return value;
+}
+
+static inline uchar
+read_aux_stat(const wd33c93_regs regs)
+{
+ return *regs.SASR;
+}
+
+static inline void
+write_wd33c93(const wd33c93_regs regs, uchar reg_num, uchar value)
+{
+ *regs.SASR = reg_num;
+ mb();
+ *regs.SCMD = value;
+ mb();
+}
+
+static void
+write_wd33c93_count(const wd33c93_regs regs, unsigned long value)
+{
+ *regs.SASR = WD_TRANSFER_COUNT_MSB;
+ mb();
+ *regs.SCMD = value >> 16;
+ *regs.SCMD = value >> 8;
+ *regs.SCMD = value;
+ mb();
+}
+
+static inline void
+write_wd33c93_cmd(const wd33c93_regs regs, uchar cmd)
+{
+ *regs.SASR = WD_COMMAND;
+ mb();
+ *regs.SCMD = cmd;
+ mb();
+}
+
+static inline void
+write_wd33c93_cdb(const wd33c93_regs regs, uint len, uchar cmnd[])
+{
+ int i;
+
+ *regs.SASR = WD_CDB_1;
+ for (i = 0; i < len; i++)
+ *regs.SCMD = cmnd[i];
+}
+#endif /* CONFIG_WD33C93_PIO */
+
+static inline uchar
+read_1_byte(const wd33c93_regs regs)
+{
+ uchar asr;
+ uchar x = 0;
+
+ write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
+ write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO | 0x80);
+ do {
+ asr = read_aux_stat(regs);
+ if (asr & ASR_DBR)
+ x = read_wd33c93(regs, WD_DATA);
+ } while (!(asr & ASR_INT));
+ return x;
+}
+
+static struct sx_period sx_table[] = {
+ {1, 0x20},
+ {252, 0x20},
+ {376, 0x30},
+ {500, 0x40},
+ {624, 0x50},
+ {752, 0x60},
+ {876, 0x70},
+ {1000, 0x00},
+ {0, 0}
+};
+
+static 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;
+}
+
+static 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;
+}
+
+int
+wd33c93_queuecommand(struct scsi_cmnd *cmd,
+ void (*done)(struct scsi_cmnd *))
+{
+ struct WD33C93_hostdata *hostdata;
+ struct scsi_cmnd *tmp;
+
+ hostdata = (struct WD33C93_hostdata *) cmd->device->host->hostdata;
+
+ DB(DB_QUEUE_COMMAND,
+ printk("Q-%d-%02x-%ld( ", cmd->device->id, 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-reselect. 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 is not used
+ * - 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 = page_address(cmd->SCp.buffer->page) +
+ cmd->SCp.buffer->offset;
+ 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;
+ }
+
+/* WD docs state that at the conclusion of a "LEVEL2" command, the
+ * status byte can be retrieved from the LUN register. Apparently,
+ * this is the case only for *uninterrupted* LEVEL2 commands! If
+ * there are any unexpected phases entered, even if they are 100%
+ * legal (different devices may choose to do things differently),
+ * the LEVEL2 command sequence is exited. This often occurs prior
+ * to receiving the status byte, in which case the driver does a
+ * status phase interrupt and gets the status byte on its own.
+ * While such a command can then be "resumed" (ie restarted to
+ * finish up as a LEVEL2 command), the LUN register will NOT be
+ * a valid status byte at the command's conclusion, and we must
+ * use the byte obtained during the earlier interrupt. Here, we
+ * preset SCp.Status to an illegal value (0xff) so that when
+ * this command finally completes, we can tell where the actual
+ * status byte is stored.
+ */
+
+ cmd->SCp.Status = ILLEGAL_STATUS_BYTE;
+
+ /*
+ * 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.
+ */
+
+ spin_lock_irq(&hostdata->lock);
+
+ 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 = (struct scsi_cmnd *) hostdata->input_Q;
+ tmp->host_scribble;
+ tmp = (struct 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!
+ */
+
+ wd33c93_execute(cmd->device->host);
+
+ DB(DB_QUEUE_COMMAND, printk(")Q-%ld ", cmd->pid))
+
+ spin_unlock_irq(&hostdata->lock);
+ return 0;
+}
+
+/*
+ * 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.
+ *
+ * wd33c93_execute() is always called with interrupts disabled or from
+ * the wd33c93_intr itself, which means that a wd33c93 interrupt
+ * cannot occur while we are in here.
+ */
+static void
+wd33c93_execute(struct Scsi_Host *instance)
+{
+ struct WD33C93_hostdata *hostdata =
+ (struct WD33C93_hostdata *) instance->hostdata;
+ const wd33c93_regs regs = hostdata->regs;
+ struct scsi_cmnd *cmd, *prev;
+
+ DB(DB_EXECUTE, printk("EX("))
+ if (hostdata->selecting || hostdata->connected) {
+ DB(DB_EXECUTE, printk(")EX-0 "))
+ return;
+ }
+
+ /*
+ * Search through the input_Q for a command destined
+ * for an idle target/lun.
+ */
+
+ cmd = (struct scsi_cmnd *) hostdata->input_Q;
+ prev = 0;
+ while (cmd) {
+ if (!(hostdata->busy[cmd->device->id] & (1 << cmd->device->lun)))
+ break;
+ prev = cmd;
+ cmd = (struct scsi_cmnd *) cmd->host_scribble;
+ }
+
+ /* quit if queue empty or all possible targets are busy */
+
+ if (!cmd) {
+ DB(DB_EXECUTE, printk(")EX-1 "))
+ return;
+ }
+
+ /* remove command from queue */
+
+ if (prev)
+ prev->host_scribble = cmd->host_scribble;
+ else
+ hostdata->input_Q = (struct scsi_cmnd *) cmd->host_scribble;
+
+#ifdef PROC_STATISTICS
+ hostdata->cmd_cnt[cmd->device->id]++;
+#endif
+
+ /*
+ * Start the selection process
+ */
+
+ if (cmd->sc_data_direction == DMA_TO_DEVICE)
+ write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id);
+ else
+ write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id | 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 = (struct scsi_cmnd *) hostdata->input_Q; prev;
+ prev = (struct scsi_cmnd *) prev->host_scribble) {
+ if ((prev->device->id != cmd->device->id) ||
+ (prev->device->lun != cmd->device->lun)) {
+ for (prev = (struct scsi_cmnd *) hostdata->input_Q; prev;
+ prev = (struct scsi_cmnd *) prev->host_scribble)
+ prev->SCp.phase = 1;
+ goto yes;
+ }
+ }
+
+ goto no;
+
+ yes:
+ cmd->SCp.phase = 1;
+
+#ifdef PROC_STATISTICS
+ hostdata->disc_allowed_cnt[cmd->device->id]++;
+#endif
+
+ no:
+
+ write_wd33c93(regs, WD_SOURCE_ID, ((cmd->SCp.phase) ? SRCID_ER : 0));
+
+ write_wd33c93(regs, WD_TARGET_LUN, cmd->device->lun);
+ write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER,
+ hostdata->sync_xfer[cmd->device->id]);
+ hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun);
+
+ if ((hostdata->level2 == L2_NONE) ||
+ (hostdata->sync_stat[cmd->device->id] == 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 SX_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.
+ * If we've been asked not to try synchronous transfers on this
+ * target (and _all_ luns within it), we'll still send the SDTR message
+ * later, but at that time we'll negotiate for async by specifying a
+ * sync fifo depth of 0.
+ */
+ if (hostdata->sync_stat[cmd->device->id] == SS_UNSET)
+ hostdata->sync_stat[cmd->device->id] = SS_FIRST;
+ hostdata->state = S_SELECTING;
+ write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */
+ write_wd33c93_cmd(regs, 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_wd33c93(regs, WD_COMMAND_PHASE, 0);
+
+ /* copy command_descriptor_block into WD chip
+ * (take advantage of auto-incrementing)
+ */
+
+ write_wd33c93_cdb(regs, cmd->cmd_len, cmd->cmnd);
+
+ /* 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_wd33c93(regs, WD_OWN_ID, cmd->cmd_len);
+
+ /* When doing a non-disconnect command with DMA, we can save
+ * ourselves a DATA phase interrupt later by setting everything
+ * up ahead of time.
+ */
+
+ if ((cmd->SCp.phase == 0) && (hostdata->no_dma == 0)) {
+ if (hostdata->dma_setup(cmd,
+ (cmd->sc_data_direction == DMA_TO_DEVICE) ?
+ DATA_OUT_DIR : DATA_IN_DIR))
+ write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */
+ else {
+ write_wd33c93_count(regs,
+ cmd->SCp.this_residual);
+ write_wd33c93(regs, WD_CONTROL,
+ CTRL_IDI | CTRL_EDI | CTRL_DMA);
+ hostdata->dma = D_DMA_RUNNING;
+ }
+ } else
+ write_wd33c93_count(regs, 0); /* guarantee a DATA_PHASE interrupt */
+
+ hostdata->state = S_RUNNING_LEVEL2;
+ write_wd33c93_cmd(regs, 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))
+}
+
+static void
+transfer_pio(const wd33c93_regs regs, uchar * buf, int cnt,
+ int data_in_dir, struct WD33C93_hostdata *hostdata)
+{
+ uchar asr;
+
+ DB(DB_TRANSFER,
+ printk("(%p,%d,%s:", buf, cnt, data_in_dir ? "in" : "out"))
+
+ write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
+ write_wd33c93_count(regs, cnt);
+ write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO);
+ if (data_in_dir) {
+ do {
+ asr = read_aux_stat(regs);
+ if (asr & ASR_DBR)
+ *buf++ = read_wd33c93(regs, WD_DATA);
+ } while (!(asr & ASR_INT));
+ } else {
+ do {
+ asr = read_aux_stat(regs);
+ if (asr & ASR_DBR)
+ write_wd33c93(regs, 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.
+ */
+
+}
+
+static void
+transfer_bytes(const wd33c93_regs regs, struct scsi_cmnd *cmd,
+ int data_in_dir)
+{
+ struct WD33C93_hostdata *hostdata;
+ unsigned long length;
+
+ hostdata = (struct WD33C93_hostdata *) cmd->device->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 = page_address(cmd->SCp.buffer->page) +
+ cmd->SCp.buffer->offset;
+ }
+
+ write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER,
+ hostdata->sync_xfer[cmd->device->id]);
+
+/* 'hostdata->no_dma' is TRUE if we don't even want to try DMA.
+ * Update 'this_residual' and 'ptr' after 'transfer_pio()' returns.
+ */
+
+ if (hostdata->no_dma || hostdata->dma_setup(cmd, data_in_dir)) {
+#ifdef PROC_STATISTICS
+ hostdata->pio_cnt++;
+#endif
+ transfer_pio(regs, (uchar *) cmd->SCp.ptr,
+ cmd->SCp.this_residual, data_in_dir, hostdata);
+ length = cmd->SCp.this_residual;
+ cmd->SCp.this_residual = read_wd33c93_count(regs);
+ cmd->SCp.ptr += (length - cmd->SCp.this_residual);
+ }
+
+/* We are able to do DMA (in fact, the Amiga hardware is
+ * already going!), so start up the wd33c93 in DMA mode.
+ * We set 'hostdata->dma' = D_DMA_RUNNING so that when the
+ * transfer completes and causes an interrupt, we're
+ * reminded to tell the Amiga to shut down its end. We'll
+ * postpone the updating of 'this_residual' and 'ptr'
+ * until then.
+ */
+
+ else {
+#ifdef PROC_STATISTICS
+ hostdata->dma_cnt++;
+#endif
+ write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_DMA);
+ write_wd33c93_count(regs, cmd->SCp.this_residual);
+
+ if ((hostdata->level2 >= L2_DATA) ||
+ (hostdata->level2 == L2_BASIC && cmd->SCp.phase == 0)) {
+ write_wd33c93(regs, WD_COMMAND_PHASE, 0x45);
+ write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
+ hostdata->state = S_RUNNING_LEVEL2;
+ } else
+ write_wd33c93_cmd(regs, WD_CMD_TRANS_INFO);
+
+ hostdata->dma = D_DMA_RUNNING;
+ }
+}
+
+void
+wd33c93_intr(struct Scsi_Host *instance)
+{
+ struct WD33C93_hostdata *hostdata =
+ (struct WD33C93_hostdata *) instance->hostdata;
+ const wd33c93_regs regs = hostdata->regs;
+ struct scsi_cmnd *patch, *cmd;
+ uchar asr, sr, phs, id, lun, *ucp, msg;
+ unsigned long length, flags;
+
+ asr = read_aux_stat(regs);
+ if (!(asr & ASR_INT) || (asr & ASR_BSY))
+ return;
+
+ spin_lock_irqsave(&hostdata->lock, flags);
+
+#ifdef PROC_STATISTICS
+ hostdata->int_cnt++;
+#endif
+
+ cmd = (struct scsi_cmnd *) hostdata->connected; /* assume we're connected */
+ sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear the interrupt */
+ phs = read_wd33c93(regs, WD_COMMAND_PHASE);
+
+ DB(DB_INTR, printk("{%02x:%02x-", asr, sr))
+
+/* After starting a DMA transfer, the next interrupt
+ * is guaranteed to be in response to completion of
+ * the transfer. Since the Amiga DMA hardware runs in
+ * in an open-ended fashion, it needs to be told when
+ * to stop; do that here if D_DMA_RUNNING is true.
+ * 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 needed, we go on and service the WD3393
+ * interrupt normally.
+ */
+ if (hostdata->dma == D_DMA_RUNNING) {
+ DB(DB_TRANSFER,
+ printk("[%p/%d:", cmd->SCp.ptr, cmd->SCp.this_residual))
+ hostdata->dma_stop(cmd->device->host, cmd, 1);
+ hostdata->dma = D_DMA_OFF;
+ length = cmd->SCp.this_residual;
+ cmd->SCp.this_residual = read_wd33c93_count(regs);
+ 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"))
+
+ if (hostdata->state == S_RUNNING_LEVEL2)
+ hostdata->connected = NULL;
+ else {
+ cmd = (struct scsi_cmnd *) hostdata->selecting; /* get a valid cmd */
+ hostdata->selecting = NULL;
+ }
+
+ cmd->result = DID_NO_CONNECT << 16;
+ hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
+ hostdata->state = S_UNCONNECTED;
+ cmd->scsi_done(cmd);
+
+ /* From esp.c:
+ * There is a window of time within the scsi_done() path
+ * of execution where interrupts are turned back on full
+ * blast and left that way. During that time we could
+ * reconnect to a disconnected command, then we'd bomb
+ * out below. We could also end up executing two commands
+ * at _once_. ...just so you know why the restore_flags()
+ * is here...
+ */
+
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+
+/* We are not connected to a target - check to see if there
+ * are commands waiting to be executed.
+ */
+
+ wd33c93_execute(instance);
+ break;
+
+/* Note: this interrupt should not occur in a LEVEL2 command */
+
+ case CSR_SELECT:
+ DB(DB_INTR, printk("SELECT"))
+ hostdata->connected = cmd =
+ (struct scsi_cmnd *) hostdata->selecting;
+ hostdata->selecting = NULL;
+
+ /* construct an IDENTIFY message with correct disconnect bit */
+
+ hostdata->outgoing_msg[0] = (0x80 | 0x00 | cmd->device->lun);
+ if (cmd->SCp.phase)
+ hostdata->outgoing_msg[0] |= 0x40;
+
+ if (hostdata->sync_stat[cmd->device->id] == SS_FIRST) {
+#ifdef SYNC_DEBUG
+ printk(" sending SDTR ");
+#endif
+
+ hostdata->sync_stat[cmd->device->id] = SS_WAITING;
+
+/* Tack on a 2nd message to ask about synchronous transfers. If we've
+ * been asked to do only asynchronous transfers on this device, we
+ * request a fifo depth of 0, which is equivalent to async - should
+ * solve the problems some people have had with GVP's Guru ROM.
+ */
+
+ hostdata->outgoing_msg[1] = EXTENDED_MESSAGE;
+ hostdata->outgoing_msg[2] = 3;
+ hostdata->outgoing_msg[3] = EXTENDED_SDTR;
+ if (hostdata->no_sync & (1 << cmd->device->id)) {
+ hostdata->outgoing_msg[4] =
+ hostdata->default_sx_per / 4;
+ hostdata->outgoing_msg[5] = 0;
+ } else {
+ 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;
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+ 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(regs, cmd, DATA_IN_DIR);
+ if (hostdata->state != S_RUNNING_LEVEL2)
+ hostdata->state = S_CONNECTED;
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+ 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(regs, cmd, DATA_OUT_DIR);
+ if (hostdata->state != S_RUNNING_LEVEL2)
+ hostdata->state = S_CONNECTED;
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+ 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(regs, cmd->cmnd, cmd->cmd_len, DATA_OUT_DIR,
+ hostdata);
+ hostdata->state = S_CONNECTED;
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+ 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(regs);
+ DB(DB_INTR, printk("%02x", cmd->SCp.Status))
+ if (hostdata->level2 >= L2_BASIC) {
+ sr = read_wd33c93(regs, WD_SCSI_STATUS); /* clear interrupt */
+ hostdata->state = S_RUNNING_LEVEL2;
+ write_wd33c93(regs, WD_COMMAND_PHASE, 0x50);
+ write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
+ } else {
+ hostdata->state = S_CONNECTED;
+ }
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+ 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="))
+
+ msg = read_1_byte(regs);
+ sr = read_wd33c93(regs, 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_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
+ hostdata->state = S_PRE_CMP_DISC;
+ break;
+
+ case SAVE_POINTERS:
+ DB(DB_INTR, printk("SDP"))
+ write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
+ hostdata->state = S_CONNECTED;
+ break;
+
+ case RESTORE_POINTERS:
+ DB(DB_INTR, printk("RDP"))
+ if (hostdata->level2 >= L2_BASIC) {
+ write_wd33c93(regs, WD_COMMAND_PHASE, 0x45);
+ write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
+ hostdata->state = S_RUNNING_LEVEL2;
+ } else {
+ write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
+ hostdata->state = S_CONNECTED;
+ }
+ break;
+
+ case DISCONNECT:
+ DB(DB_INTR, printk("DIS"))
+ cmd->device->disconnect = 1;
+ write_wd33c93_cmd(regs, 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->device->id] == SS_WAITING)
+ hostdata->sync_stat[cmd->device->id] = SS_SET;
+ write_wd33c93_cmd(regs, 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->device->id] !=
+ 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_wd33c93_cmd(regs, 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->device->id] =
+ calc_sync_xfer(hostdata->
+ default_sx_per
+ / 4, 0);
+ } else {
+ hostdata->sync_xfer[cmd->device->id] = id;
+ }
+#ifdef SYNC_DEBUG
+ printk("sync_xfer=%02x",
+ hostdata->sync_xfer[cmd->device->id]);
+#endif
+ hostdata->sync_stat[cmd->device->id] =
+ SS_SET;
+ write_wd33c93_cmd(regs,
+ WD_CMD_NEGATE_ACK);
+ hostdata->state = S_CONNECTED;
+ break;
+ case EXTENDED_WDTR:
+ write_wd33c93_cmd(regs, 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_wd33c93_cmd(regs,
+ WD_CMD_NEGATE_ACK);
+ hostdata->state = S_CONNECTED;
+ break;
+ default:
+ write_wd33c93_cmd(regs, 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_wd33c93_cmd(regs,
+ 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_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
+ hostdata->state = S_CONNECTED;
+ }
+ break;
+
+ default:
+ printk("Rejecting Unknown Message(%02x) ", msg);
+ write_wd33c93_cmd(regs, WD_CMD_ASSERT_ATN); /* want MESS_OUT */
+ hostdata->outgoing_msg[0] = MESSAGE_REJECT;
+ hostdata->outgoing_len = 1;
+ write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
+ hostdata->state = S_CONNECTED;
+ }
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+ break;
+
+/* Note: this interrupt will occur only after a LEVEL2 command */
+
+ case CSR_SEL_XFER_DONE:
+
+/* Make sure that reselection is enabled at this point - it may
+ * have been turned off for the command that just completed.
+ */
+
+ write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER);
+ if (phs == 0x60) {
+ DB(DB_INTR, printk("SX-DONE-%ld", cmd->pid))
+ cmd->SCp.Message = COMMAND_COMPLETE;
+ lun = read_wd33c93(regs, WD_TARGET_LUN);
+ DB(DB_INTR, printk(":%d.%d", cmd->SCp.Status, lun))
+ hostdata->connected = NULL;
+ hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
+ hostdata->state = S_UNCONNECTED;
+ if (cmd->SCp.Status == ILLEGAL_STATUS_BYTE)
+ cmd->SCp.Status = lun;
+ if (cmd->cmnd[0] == REQUEST_SENSE
+ && cmd->SCp.Status != GOOD)
+ cmd->result =
+ (cmd->
+ result & 0x00ffff) | (DID_ERROR << 16);
+ else
+ cmd->result =
+ cmd->SCp.Status | (cmd->SCp.Message << 8);
+ cmd->scsi_done(cmd);
+
+/* We are no longer connected to a target - check to see if
+ * there are commands waiting to be executed.
+ */
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+ wd33c93_execute(instance);
+ } else {
+ printk
+ ("%02x:%02x:%02x-%ld: Unknown SEL_XFER_DONE phase!!---",
+ asr, sr, phs, cmd->pid);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+ }
+ 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_wd33c93(regs, WD_COMMAND_PHASE, 0x41);
+ write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+ 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(regs, 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;
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+ 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.
+ */
+
+/* Make sure that reselection is enabled at this point - it may
+ * have been turned off for the command that just completed.
+ */
+
+ write_wd33c93(regs, WD_SOURCE_ID, SRCID_ER);
+ if (cmd == NULL) {
+ printk(" - Already disconnected! ");
+ hostdata->state = S_UNCONNECTED;
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+ return;
+ }
+ DB(DB_INTR, printk("UNEXP_DISC-%ld", cmd->pid))
+ hostdata->connected = NULL;
+ hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
+ hostdata->state = S_UNCONNECTED;
+ if (cmd->cmnd[0] == REQUEST_SENSE && cmd->SCp.Status != GOOD)
+ cmd->result =
+ (cmd->result & 0x00ffff) | (DID_ERROR << 16);
+ else
+ cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
+ cmd->scsi_done(cmd);
+
+/* We are no longer connected to a target - check to see if
+ * there are commands waiting to be executed.
+ */
+ /* look above for comments on scsi_done() */
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+ wd33c93_execute(instance);
+ break;
+
+ case CSR_DISC:
+
+/* Make sure that reselection is enabled at this point - it may
+ * have been turned off for the command that just completed.
+ */
+
+ write_wd33c93(regs, 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->device->id] &= ~(1 << cmd->device->lun);
+ hostdata->state = S_UNCONNECTED;
+ DB(DB_INTR, printk(":%d", cmd->SCp.Status))
+ if (cmd->cmnd[0] == REQUEST_SENSE
+ && cmd->SCp.Status != GOOD)
+ cmd->result =
+ (cmd->
+ result & 0x00ffff) | (DID_ERROR << 16);
+ else
+ cmd->result =
+ cmd->SCp.Status | (cmd->SCp.Message << 8);
+ 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_STATISTICS
+ hostdata->disc_done_cnt[cmd->device->id]++;
+#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.
+ */
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+ wd33c93_execute(instance);
+ break;
+
+ case CSR_RESEL_AM:
+ case CSR_RESEL:
+ DB(DB_INTR, printk("RESEL%s", sr == CSR_RESEL_AM ? "_AM" : ""))
+
+ /* Old chips (pre -A ???) don't have advanced features and will
+ * generate CSR_RESEL. In that case we have to extract the LUN the
+ * hard way (see below).
+ * 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 = (struct scsi_cmnd *) hostdata->selecting;
+ hostdata->selecting = NULL;
+ hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
+ cmd->host_scribble =
+ (uchar *) hostdata->input_Q;
+ hostdata->input_Q = cmd;
+ }
+ }
+
+ else {
+
+ if (cmd) {
+ if (phs == 0x00) {
+ hostdata->busy[cmd->device->id] &=
+ ~(1 << cmd->device->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_wd33c93(regs, 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...)
+ */
+
+ if (sr == CSR_RESEL_AM) {
+ lun = read_wd33c93(regs, WD_DATA);
+ if (hostdata->level2 < L2_RESELECT)
+ write_wd33c93_cmd(regs, WD_CMD_NEGATE_ACK);
+ lun &= 7;
+ } else {
+ /* Old chip; wait for msgin phase to pick up the LUN. */
+ for (lun = 255; lun; lun--) {
+ if ((asr = read_aux_stat(regs)) & ASR_INT)
+ break;
+ udelay(10);
+ }
+ if (!(asr & ASR_INT)) {
+ printk
+ ("wd33c93: Reselected without IDENTIFY\n");
+ lun = 0;
+ } else {
+ /* Verify this is a change to MSG_IN and read the message */
+ sr = read_wd33c93(regs, WD_SCSI_STATUS);
+ if (sr == (CSR_ABORT | PHS_MESS_IN) ||
+ sr == (CSR_UNEXP | PHS_MESS_IN) ||
+ sr == (CSR_SRV_REQ | PHS_MESS_IN)) {
+ /* Got MSG_IN, grab target LUN */
+ lun = read_1_byte(regs);
+ /* Now we expect a 'paused with ACK asserted' int.. */
+ asr = read_aux_stat(regs);
+ if (!(asr & ASR_INT)) {
+ udelay(10);
+ asr = read_aux_stat(regs);
+ if (!(asr & ASR_INT))
+ printk
+ ("wd33c93: No int after LUN on RESEL (%02x)\n",
+ asr);
+ }
+ sr = read_wd33c93(regs, WD_SCSI_STATUS);
+ if (sr != CSR_MSGIN)
+ printk
+ ("wd33c93: Not paused with ACK on RESEL (%02x)\n",
+ sr);
+ lun &= 7;
+ write_wd33c93_cmd(regs,
+ WD_CMD_NEGATE_ACK);
+ } else {
+ printk
+ ("wd33c93: Not MSG_IN on reselect (%02x)\n",
+ sr);
+ lun = 0;
+ }
+ }
+ }
+
+ /* Now we look for the command that's reconnecting. */
+
+ cmd = (struct scsi_cmnd *) hostdata->disconnected_Q;
+ patch = NULL;
+ while (cmd) {
+ if (id == cmd->device->id && lun == cmd->device->lun)
+ break;
+ patch = cmd;
+ cmd = (struct 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);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+ return;
+ }
+
+ /* Ok, found the command - now start it up again. */
+
+ if (patch)
+ patch->host_scribble = cmd->host_scribble;
+ else
+ hostdata->disconnected_Q =
+ (struct 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 (cmd->sc_data_direction == DMA_TO_DEVICE)
+ write_wd33c93(regs, WD_DESTINATION_ID, cmd->device->id);
+ else
+ write_wd33c93(regs, WD_DESTINATION_ID,
+ cmd->device->id | DSTID_DPD);
+ if (hostdata->level2 >= L2_RESELECT) {
+ write_wd33c93_count(regs, 0); /* we want a DATA_PHASE interrupt */
+ write_wd33c93(regs, WD_COMMAND_PHASE, 0x45);
+ write_wd33c93_cmd(regs, WD_CMD_SEL_ATN_XFER);
+ hostdata->state = S_RUNNING_LEVEL2;
+ } else
+ hostdata->state = S_CONNECTED;
+
+ DB(DB_INTR, printk("-%ld", cmd->pid))
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+ break;
+
+ default:
+ printk("--UNKNOWN INTERRUPT:%02x:%02x:%02x--", asr, sr, phs);
+ spin_unlock_irqrestore(&hostdata->lock, flags);
+ }
+
+ DB(DB_INTR, printk("} "))
+
+}
+
+static void
+reset_wd33c93(struct Scsi_Host *instance)
+{
+ struct WD33C93_hostdata *hostdata =
+ (struct WD33C93_hostdata *) instance->hostdata;
+ const wd33c93_regs regs = hostdata->regs;
+ uchar sr;
+
+#ifdef CONFIG_SGI_IP22
+ {
+ int busycount = 0;
+ extern void sgiwd93_reset(unsigned long);
+ /* wait 'til the chip gets some time for us */
+ while ((read_aux_stat(regs) & ASR_BSY) && busycount++ < 100)
+ udelay (10);
+ /*
+ * there are scsi devices out there, which manage to lock up
+ * the wd33c93 in a busy condition. In this state it won't
+ * accept the reset command. The only way to solve this is to
+ * give the chip a hardware reset (if possible). The code below
+ * does this for the SGI Indy, where this is possible
+ */
+ /* still busy ? */
+ if (read_aux_stat(regs) & ASR_BSY)
+ sgiwd93_reset(instance->base); /* yeah, give it the hard one */
+ }
+#endif
+
+ write_wd33c93(regs, WD_OWN_ID, OWNID_EAF | OWNID_RAF |
+ instance->this_id | hostdata->clock_freq);
+ write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
+ write_wd33c93(regs, WD_SYNCHRONOUS_TRANSFER,
+ calc_sync_xfer(hostdata->default_sx_per / 4,
+ DEFAULT_SX_OFF));
+ write_wd33c93(regs, WD_COMMAND, WD_CMD_RESET);
+
+
+#ifdef CONFIG_MVME147_SCSI
+ udelay(25); /* The old wd33c93 on MVME147 needs this, at least */
+#endif
+
+ while (!(read_aux_stat(regs) & ASR_INT))
+ ;
+ sr = read_wd33c93(regs, WD_SCSI_STATUS);
+
+ hostdata->microcode = read_wd33c93(regs, WD_CDB_1);
+ if (sr == 0x00)
+ hostdata->chip = C_WD33C93;
+ else if (sr == 0x01) {
+ write_wd33c93(regs, WD_QUEUE_TAG, 0xa5); /* any random number */
+ sr = read_wd33c93(regs, WD_QUEUE_TAG);
+ if (sr == 0xa5) {
+ hostdata->chip = C_WD33C93B;
+ write_wd33c93(regs, WD_QUEUE_TAG, 0);
+ } else
+ hostdata->chip = C_WD33C93A;
+ } else
+ hostdata->chip = C_UNKNOWN_CHIP;
+
+ write_wd33c93(regs, WD_TIMEOUT_PERIOD, TIMEOUT_PERIOD_VALUE);
+ write_wd33c93(regs, WD_CONTROL, CTRL_IDI | CTRL_EDI | CTRL_POLLED);
+}
+
+int
+wd33c93_host_reset(struct scsi_cmnd * SCpnt)
+{
+ struct Scsi_Host *instance;
+ struct WD33C93_hostdata *hostdata;
+ int i;
+
+ instance = SCpnt->device->host;
+ hostdata = (struct WD33C93_hostdata *) instance->hostdata;
+
+ printk("scsi%d: reset. ", instance->host_no);
+ disable_irq(instance->irq);
+
+ hostdata->dma_stop(instance, NULL, 0);
+ for (i = 0; i < 8; i++) {
+ hostdata->busy[i] = 0;
+ hostdata->sync_xfer[i] =
+ calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF);
+ hostdata->sync_stat[i] = 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->dma = D_DMA_OFF;
+ hostdata->incoming_ptr = 0;
+ hostdata->outgoing_len = 0;
+
+ reset_wd33c93(instance);
+ SCpnt->result = DID_RESET << 16;
+ enable_irq(instance->irq);
+ return SUCCESS;
+}
+
+int
+wd33c93_abort(struct scsi_cmnd * cmd)
+{
+ struct Scsi_Host *instance;
+ struct WD33C93_hostdata *hostdata;
+ wd33c93_regs regs;
+ struct scsi_cmnd *tmp, *prev;
+
+ disable_irq(cmd->device->host->irq);
+
+ instance = cmd->device->host;
+ hostdata = (struct WD33C93_hostdata *) instance->hostdata;
+ regs = hostdata->regs;
+
+/*
+ * Case 1 : If the command hasn't been issued yet, we simply remove it
+ * from the input_Q.
+ */
+
+ tmp = (struct scsi_cmnd *) hostdata->input_Q;
+ prev = 0;
+ while (tmp) {
+ if (tmp == cmd) {
+ if (prev)
+ prev->host_scribble = cmd->host_scribble;
+ else
+ hostdata->input_Q =
+ (struct scsi_cmnd *) 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);
+ enable_irq(cmd->device->host->irq);
+ cmd->scsi_done(cmd);
+ return SUCCESS;
+ }
+ prev = tmp;
+ tmp = (struct 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) {
+ uchar sr, asr;
+ unsigned long timeout;
+
+ printk("scsi%d: Aborting connected command %ld - ",
+ instance->host_no, cmd->pid);
+
+ printk("stopping DMA - ");
+ if (hostdata->dma == D_DMA_RUNNING) {
+ hostdata->dma_stop(instance, cmd, 0);
+ hostdata->dma = D_DMA_OFF;
+ }
+
+ printk("sending wd33c93 ABORT command - ");
+ write_wd33c93(regs, WD_CONTROL,
+ CTRL_IDI | CTRL_EDI | CTRL_POLLED);
+ write_wd33c93_cmd(regs, WD_CMD_ABORT);
+
+/* Now we have to attempt to flush out the FIFO... */
+
+ printk("flushing fifo - ");
+ timeout = 1000000;
+ do {
+ asr = read_aux_stat(regs);
+ if (asr & ASR_DBR)
+ read_wd33c93(regs, WD_DATA);
+ } while (!(asr & ASR_INT) && timeout-- > 0);
+ sr = read_wd33c93(regs, WD_SCSI_STATUS);
+ printk
+ ("asr=%02x, sr=%02x, %ld bytes un-transferred (timeout=%ld) - ",
+ asr, sr, read_wd33c93_count(regs), timeout);
+
+ /*
+ * Abort command processed.
+ * Still connected.
+ * We must disconnect.
+ */
+
+ printk("sending wd33c93 DISCONNECT command - ");
+ write_wd33c93_cmd(regs, WD_CMD_DISCONNECT);
+
+ timeout = 1000000;
+ asr = read_aux_stat(regs);
+ while ((asr & ASR_CIP) && timeout-- > 0)
+ asr = read_aux_stat(regs);
+ sr = read_wd33c93(regs, WD_SCSI_STATUS);
+ printk("asr=%02x, sr=%02x.", asr, sr);
+
+ hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
+ hostdata->connected = NULL;
+ hostdata->state = S_UNCONNECTED;
+ cmd->result = DID_ABORT << 16;
+
+/* sti();*/
+ wd33c93_execute(instance);
+
+ enable_irq(cmd->device->host->irq);
+ cmd->scsi_done(cmd);
+ return 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...
+ */
+
+ tmp = (struct scsi_cmnd *) hostdata->disconnected_Q;
+ while (tmp) {
+ if (tmp == cmd) {
+ printk
+ ("scsi%d: Abort - command %ld found on disconnected_Q - ",
+ instance->host_no, cmd->pid);
+ printk("Abort SNOOZE. ");
+ enable_irq(cmd->device->host->irq);
+ return FAILED;
+ }
+ tmp = (struct scsi_cmnd *) tmp->host_scribble;
+ }
+
+/*
+ * 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 something really
+ * broke.
+ */
+
+/* sti();*/
+ wd33c93_execute(instance);
+
+ enable_irq(cmd->device->host->irq);
+ printk("scsi%d: warning : SCSI command probably completed successfully"
+ " before abortion. ", instance->host_no);
+ return FAILED;
+}
+
+#define MAX_WD33C93_HOSTS 4
+#define MAX_SETUP_ARGS ((int)(sizeof(setup_args) / sizeof(char *)))
+#define SETUP_BUFFER_SIZE 200
+static char setup_buffer[SETUP_BUFFER_SIZE];
+static char setup_used[MAX_SETUP_ARGS];
+static int done_setup = 0;
+
+int
+wd33c93_setup(char *str)
+{
+ int i;
+ char *p1, *p2;
+
+ /* The kernel does some processing of the command-line before calling
+ * this function: If it begins with any decimal or hex number arguments,
+ * ints[0] = how many numbers found and ints[1] through [n] are the values
+ * themselves. str points to where the non-numeric arguments (if any)
+ * start: We do our own parsing of those. We construct synthetic 'nosync'
+ * keywords out of numeric args (to maintain compatibility with older
+ * versions) and then add the rest of the arguments.
+ */
+
+ p1 = setup_buffer;
+ *p1 = '\0';
+ if (str)
+ strncpy(p1, str, SETUP_BUFFER_SIZE - strlen(setup_buffer));
+ setup_buffer[SETUP_BUFFER_SIZE - 1] = '\0';
+ p1 = setup_buffer;
+ i = 0;
+ while (*p1 && (i < MAX_SETUP_ARGS)) {
+ p2 = strchr(p1, ',');
+ if (p2) {
+ *p2 = '\0';
+ if (p1 != p2)
+ setup_args[i] = p1;
+ p1 = p2 + 1;
+ i++;
+ } else {
+ setup_args[i] = p1;
+ break;
+ }
+ }
+ for (i = 0; i < MAX_SETUP_ARGS; i++)
+ setup_used[i] = 0;
+ done_setup = 1;
+
+ return 1;
+}
+__setup("wd33c93=", wd33c93_setup);
+
+/* check_setup_args() returns index if key found, 0 if not
+ */
+static int
+check_setup_args(char *key, int *flags, int *val, char *buf)
+{
+ int x;
+ char *cp;
+
+ for (x = 0; x < MAX_SETUP_ARGS; x++) {
+ if (setup_used[x])
+ continue;
+ if (!strncmp(setup_args[x], key, strlen(key)))
+ break;
+ if (!strncmp(setup_args[x], "next", strlen("next")))
+ return 0;
+ }
+ if (x == MAX_SETUP_ARGS)
+ return 0;
+ setup_used[x] = 1;
+ cp = setup_args[x] + strlen(key);
+ *val = -1;
+ if (*cp != ':')
+ return ++x;
+ cp++;
+ if ((*cp >= '0') && (*cp <= '9')) {
+ *val = simple_strtoul(cp, NULL, 0);
+ }
+ return ++x;
+}
+
+void
+wd33c93_init(struct Scsi_Host *instance, const wd33c93_regs regs,
+ dma_setup_t setup, dma_stop_t stop, int clock_freq)
+{
+ struct WD33C93_hostdata *hostdata;
+ int i;
+ int flags;
+ int val;
+ char buf[32];
+
+ if (!done_setup && setup_strings)
+ wd33c93_setup(setup_strings);
+
+ hostdata = (struct WD33C93_hostdata *) instance->hostdata;
+
+ hostdata->regs = regs;
+ hostdata->clock_freq = clock_freq;
+ hostdata->dma_setup = setup;
+ hostdata->dma_stop = stop;
+ hostdata->dma_bounce_buffer = NULL;
+ hostdata->dma_bounce_len = 0;
+ for (i = 0; i < 8; i++) {
+ hostdata->busy[i] = 0;
+ hostdata->sync_xfer[i] =
+ calc_sync_xfer(DEFAULT_SX_PER / 4, DEFAULT_SX_OFF);
+ hostdata->sync_stat[i] = SS_UNSET; /* using default sync values */
+#ifdef PROC_STATISTICS
+ hostdata->cmd_cnt[i] = 0;
+ hostdata->disc_allowed_cnt[i] = 0;
+ hostdata->disc_done_cnt[i] = 0;
+#endif
+ }
+ hostdata->input_Q = NULL;
+ hostdata->selecting = NULL;
+ hostdata->connected = NULL;
+ hostdata->disconnected_Q = NULL;
+ hostdata->state = S_UNCONNECTED;
+ hostdata->dma = D_DMA_OFF;
+ 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;
+ hostdata->no_sync = 0xff; /* sync defaults to off */
+ hostdata->no_dma = 0; /* default is DMA enabled */
+
+#ifdef PROC_INTERFACE
+ hostdata->proc = PR_VERSION | PR_INFO | PR_STATISTICS |
+ PR_CONNECTED | PR_INPUTQ | PR_DISCQ | PR_STOP;
+#ifdef PROC_STATISTICS
+ hostdata->dma_cnt = 0;
+ hostdata->pio_cnt = 0;
+ hostdata->int_cnt = 0;
+#endif
+#endif
+
+ if (check_setup_args("nosync", &flags, &val, buf))
+ hostdata->no_sync = val;
+
+ if (check_setup_args("nodma", &flags, &val, buf))
+ hostdata->no_dma = (val == -1) ? 1 : val;
+
+ if (check_setup_args("period", &flags, &val, buf))
+ hostdata->default_sx_per =
+ sx_table[round_period((unsigned int) val)].period_ns;
+
+ if (check_setup_args("disconnect", &flags, &val, buf)) {
+ if ((val >= DIS_NEVER) && (val <= DIS_ALWAYS))
+ hostdata->disconnect = val;
+ else
+ hostdata->disconnect = DIS_ADAPTIVE;
+ }
+
+ if (check_setup_args("level2", &flags, &val, buf))
+ hostdata->level2 = val;
+
+ if (check_setup_args("debug", &flags, &val, buf))
+ hostdata->args = val & DB_MASK;
+
+ if (check_setup_args("clock", &flags, &val, buf)) {
+ if (val > 7 && val < 11)
+ val = WD33C93_FS_8_10;
+ else if (val > 11 && val < 16)
+ val = WD33C93_FS_12_15;
+ else if (val > 15 && val < 21)
+ val = WD33C93_FS_16_20;
+ else
+ val = WD33C93_FS_8_10;
+ hostdata->clock_freq = val;
+ }
+
+ if ((i = check_setup_args("next", &flags, &val, buf))) {
+ while (i)
+ setup_used[--i] = 1;
+ }
+#ifdef PROC_INTERFACE
+ if (check_setup_args("proc", &flags, &val, buf))
+ hostdata->proc = val;
+#endif
+
+ spin_lock_irq(&hostdata->lock);
+ reset_wd33c93(instance);
+ spin_unlock_irq(&hostdata->lock);
+
+ printk("wd33c93-%d: chip=%s/%d no_sync=0x%x no_dma=%d",
+ instance->host_no,
+ (hostdata->chip == C_WD33C93) ? "WD33c93" : (hostdata->chip ==
+ C_WD33C93A) ?
+ "WD33c93A" : (hostdata->chip ==
+ C_WD33C93B) ? "WD33c93B" : "unknown",
+ hostdata->microcode, hostdata->no_sync, hostdata->no_dma);
+#ifdef DEBUGGING_ON
+ printk(" debug_flags=0x%02x\n", hostdata->args);
+#else
+ printk(" debugging=OFF\n");
+#endif
+ printk(" setup_args=");
+ for (i = 0; i < MAX_SETUP_ARGS; i++)
+ printk("%s,", setup_args[i]);
+ printk("\n");
+ printk(" Version %s - %s, Compiled %s at %s\n",
+ WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__);
+}
+
+int
+wd33c93_proc_info(struct Scsi_Host *instance, char *buf, char **start, off_t off, int len, int in)
+{
+
+#ifdef PROC_INTERFACE
+
+ char *bp;
+ char tbuf[128];
+ struct WD33C93_hostdata *hd;
+ struct scsi_cmnd *cmd;
+ int x, i;
+ static int stop = 0;
+
+ hd = (struct WD33C93_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
+ * nodma
+ */
+
+ 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);
+ } else if (!strncmp(bp, "nodma:", 6)) {
+ bp += 6;
+ hd->no_dma = simple_strtoul(bp, NULL, 0);
+ } else if (!strncmp(bp, "level2:", 7)) {
+ bp += 7;
+ hd->level2 = simple_strtoul(bp, NULL, 0);
+ }
+ return len;
+ }
+
+ spin_lock_irq(&hd->lock);
+ bp = buf;
+ *bp = '\0';
+ if (hd->proc & PR_VERSION) {
+ sprintf(tbuf, "\nVersion %s - %s. Compiled %s %s",
+ WD33C93_VERSION, WD33C93_DATE, __DATE__, __TIME__);
+ strcat(bp, tbuf);
+ }
+ if (hd->proc & PR_INFO) {
+ sprintf(tbuf, "\nclock_freq=%02x no_sync=%02x no_dma=%d",
+ hd->clock_freq, hd->no_sync, hd->no_dma);
+ strcat(bp, tbuf);
+ strcat(bp, "\nsync_xfer[] = ");
+ for (x = 0; x < 7; x++) {
+ sprintf(tbuf, "\t%02x", hd->sync_xfer[x]);
+ strcat(bp, tbuf);
+ }
+ strcat(bp, "\nsync_stat[] = ");
+ for (x = 0; x < 7; x++) {
+ sprintf(tbuf, "\t%02x", hd->sync_stat[x]);
+ strcat(bp, tbuf);
+ }
+ }
+#ifdef PROC_STATISTICS
+ if (hd->proc & PR_STATISTICS) {
+ strcat(bp, "\ncommands issued: ");
+ for (x = 0; x < 7; x++) {
+ sprintf(tbuf, "\t%ld", hd->cmd_cnt[x]);
+ strcat(bp, tbuf);
+ }
+ strcat(bp, "\ndisconnects allowed:");
+ for (x = 0; x < 7; x++) {
+ sprintf(tbuf, "\t%ld", hd->disc_allowed_cnt[x]);
+ strcat(bp, tbuf);
+ }
+ strcat(bp, "\ndisconnects done: ");
+ for (x = 0; x < 7; x++) {
+ sprintf(tbuf, "\t%ld", hd->disc_done_cnt[x]);
+ strcat(bp, tbuf);
+ }
+ sprintf(tbuf,
+ "\ninterrupts: %ld, DATA_PHASE ints: %ld DMA, %ld PIO",
+ hd->int_cnt, hd->dma_cnt, hd->pio_cnt);
+ strcat(bp, tbuf);
+ }
+#endif
+ if (hd->proc & PR_CONNECTED) {
+ strcat(bp, "\nconnected: ");
+ if (hd->connected) {
+ cmd = (struct scsi_cmnd *) hd->connected;
+ sprintf(tbuf, " %ld-%d:%d(%02x)",
+ cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
+ strcat(bp, tbuf);
+ }
+ }
+ if (hd->proc & PR_INPUTQ) {
+ strcat(bp, "\ninput_Q: ");
+ cmd = (struct scsi_cmnd *) hd->input_Q;
+ while (cmd) {
+ sprintf(tbuf, " %ld-%d:%d(%02x)",
+ cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
+ strcat(bp, tbuf);
+ cmd = (struct scsi_cmnd *) cmd->host_scribble;
+ }
+ }
+ if (hd->proc & PR_DISCQ) {
+ strcat(bp, "\ndisconnected_Q:");
+ cmd = (struct scsi_cmnd *) hd->disconnected_Q;
+ while (cmd) {
+ sprintf(tbuf, " %ld-%d:%d(%02x)",
+ cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]);
+ strcat(bp, tbuf);
+ cmd = (struct scsi_cmnd *) cmd->host_scribble;
+ }
+ }
+ strcat(bp, "\n");
+ spin_unlock_irq(&hd->lock);
+ *start = buf;
+ if (stop) {
+ stop = 0;
+ return 0;
+ }
+ 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 */
+
+}
+
+void
+wd33c93_release(void)
+{
+}
+
+EXPORT_SYMBOL(wd33c93_host_reset);
+EXPORT_SYMBOL(wd33c93_init);
+EXPORT_SYMBOL(wd33c93_release);
+EXPORT_SYMBOL(wd33c93_abort);
+EXPORT_SYMBOL(wd33c93_queuecommand);
+EXPORT_SYMBOL(wd33c93_intr);
+EXPORT_SYMBOL(wd33c93_proc_info);