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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/scsi/nsp32.c
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!
Diffstat (limited to 'drivers/scsi/nsp32.c')
-rw-r--r--drivers/scsi/nsp32.c3585
1 files changed, 3585 insertions, 0 deletions
diff --git a/drivers/scsi/nsp32.c b/drivers/scsi/nsp32.c
new file mode 100644
index 000000000000..acfead1e9f17
--- /dev/null
+++ b/drivers/scsi/nsp32.c
@@ -0,0 +1,3585 @@
+/*
+ * NinjaSCSI-32Bi Cardbus, NinjaSCSI-32UDE PCI/CardBus SCSI driver
+ * Copyright (C) 2001, 2002, 2003
+ * YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>
+ * GOTO Masanori <gotom@debian.or.jp>, <gotom@debian.org>
+ *
+ * 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.
+ *
+ *
+ * Revision History:
+ * 1.0: Initial Release.
+ * 1.1: Add /proc SDTR status.
+ * Remove obsolete error handler nsp32_reset.
+ * Some clean up.
+ * 1.2: PowerPC (big endian) support.
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/ioport.h>
+#include <linux/major.h>
+#include <linux/blkdev.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/ctype.h>
+
+#include <asm/dma.h>
+#include <asm/system.h>
+#include <asm/io.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_ioctl.h>
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
+# include <linux/blk.h>
+#endif
+
+#include "nsp32.h"
+
+
+/***********************************************************************
+ * Module parameters
+ */
+static int trans_mode = 0; /* default: BIOS */
+module_param (trans_mode, int, 0);
+MODULE_PARM_DESC(trans_mode, "transfer mode (0: BIOS(default) 1: Async 2: Ultra20M");
+#define ASYNC_MODE 1
+#define ULTRA20M_MODE 2
+
+static int auto_param = 0; /* default: ON */
+module_param (auto_param, bool, 0);
+MODULE_PARM_DESC(auto_param, "AutoParameter mode (0: ON(default) 1: OFF)");
+
+static int disc_priv = 1; /* default: OFF */
+module_param (disc_priv, bool, 0);
+MODULE_PARM_DESC(disc_priv, "disconnection privilege mode (0: ON 1: OFF(default))");
+
+MODULE_AUTHOR("YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>, GOTO Masanori <gotom@debian.or.jp>");
+MODULE_DESCRIPTION("Workbit NinjaSCSI-32Bi/UDE CardBus/PCI SCSI host bus adapter module");
+MODULE_LICENSE("GPL");
+
+static const char *nsp32_release_version = "1.2";
+
+
+/****************************************************************************
+ * Supported hardware
+ */
+static struct pci_device_id nsp32_pci_table[] __devinitdata = {
+ {
+ .vendor = PCI_VENDOR_ID_IODATA,
+ .device = PCI_DEVICE_ID_NINJASCSI_32BI_CBSC_II,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = MODEL_IODATA,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_WORKBIT,
+ .device = PCI_DEVICE_ID_NINJASCSI_32BI_KME,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = MODEL_KME,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_WORKBIT,
+ .device = PCI_DEVICE_ID_NINJASCSI_32BI_WBT,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = MODEL_WORKBIT,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_WORKBIT,
+ .device = PCI_DEVICE_ID_WORKBIT_STANDARD,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = MODEL_PCI_WORKBIT,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_WORKBIT,
+ .device = PCI_DEVICE_ID_NINJASCSI_32BI_LOGITEC,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = MODEL_LOGITEC,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_WORKBIT,
+ .device = PCI_DEVICE_ID_NINJASCSI_32BIB_LOGITEC,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = MODEL_PCI_LOGITEC,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_WORKBIT,
+ .device = PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = MODEL_PCI_MELCO,
+ },
+ {
+ .vendor = PCI_VENDOR_ID_WORKBIT,
+ .device = PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO_II,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = MODEL_PCI_MELCO,
+ },
+ {0,0,},
+};
+MODULE_DEVICE_TABLE(pci, nsp32_pci_table);
+
+static nsp32_hw_data nsp32_data_base; /* probe <-> detect glue */
+
+
+/*
+ * Period/AckWidth speed conversion table
+ *
+ * Note: This period/ackwidth speed table must be in descending order.
+ */
+static nsp32_sync_table nsp32_sync_table_40M[] = {
+ /* {PNo, AW, SP, EP, SREQ smpl} Speed(MB/s) Period AckWidth */
+ {0x1, 0, 0x0c, 0x0c, SMPL_40M}, /* 20.0 : 50ns, 25ns */
+ {0x2, 0, 0x0d, 0x18, SMPL_40M}, /* 13.3 : 75ns, 25ns */
+ {0x3, 1, 0x19, 0x19, SMPL_40M}, /* 10.0 : 100ns, 50ns */
+ {0x4, 1, 0x1a, 0x1f, SMPL_20M}, /* 8.0 : 125ns, 50ns */
+ {0x5, 2, 0x20, 0x25, SMPL_20M}, /* 6.7 : 150ns, 75ns */
+ {0x6, 2, 0x26, 0x31, SMPL_20M}, /* 5.7 : 175ns, 75ns */
+ {0x7, 3, 0x32, 0x32, SMPL_20M}, /* 5.0 : 200ns, 100ns */
+ {0x8, 3, 0x33, 0x38, SMPL_10M}, /* 4.4 : 225ns, 100ns */
+ {0x9, 3, 0x39, 0x3e, SMPL_10M}, /* 4.0 : 250ns, 100ns */
+};
+
+static nsp32_sync_table nsp32_sync_table_20M[] = {
+ {0x1, 0, 0x19, 0x19, SMPL_40M}, /* 10.0 : 100ns, 50ns */
+ {0x2, 0, 0x1a, 0x25, SMPL_20M}, /* 6.7 : 150ns, 50ns */
+ {0x3, 1, 0x26, 0x32, SMPL_20M}, /* 5.0 : 200ns, 100ns */
+ {0x4, 1, 0x33, 0x3e, SMPL_10M}, /* 4.0 : 250ns, 100ns */
+ {0x5, 2, 0x3f, 0x4b, SMPL_10M}, /* 3.3 : 300ns, 150ns */
+ {0x6, 2, 0x4c, 0x57, SMPL_10M}, /* 2.8 : 350ns, 150ns */
+ {0x7, 3, 0x58, 0x64, SMPL_10M}, /* 2.5 : 400ns, 200ns */
+ {0x8, 3, 0x65, 0x70, SMPL_10M}, /* 2.2 : 450ns, 200ns */
+ {0x9, 3, 0x71, 0x7d, SMPL_10M}, /* 2.0 : 500ns, 200ns */
+};
+
+static nsp32_sync_table nsp32_sync_table_pci[] = {
+ {0x1, 0, 0x0c, 0x0f, SMPL_40M}, /* 16.6 : 60ns, 30ns */
+ {0x2, 0, 0x10, 0x16, SMPL_40M}, /* 11.1 : 90ns, 30ns */
+ {0x3, 1, 0x17, 0x1e, SMPL_20M}, /* 8.3 : 120ns, 60ns */
+ {0x4, 1, 0x1f, 0x25, SMPL_20M}, /* 6.7 : 150ns, 60ns */
+ {0x5, 2, 0x26, 0x2d, SMPL_20M}, /* 5.6 : 180ns, 90ns */
+ {0x6, 2, 0x2e, 0x34, SMPL_10M}, /* 4.8 : 210ns, 90ns */
+ {0x7, 3, 0x35, 0x3c, SMPL_10M}, /* 4.2 : 240ns, 120ns */
+ {0x8, 3, 0x3d, 0x43, SMPL_10M}, /* 3.7 : 270ns, 120ns */
+ {0x9, 3, 0x44, 0x4b, SMPL_10M}, /* 3.3 : 300ns, 120ns */
+};
+
+/*
+ * function declaration
+ */
+/* module entry point */
+static int __devinit nsp32_probe (struct pci_dev *, const struct pci_device_id *);
+static void __devexit nsp32_remove(struct pci_dev *);
+static int __init init_nsp32 (void);
+static void __exit exit_nsp32 (void);
+
+/* struct Scsi_Host_Template */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
+static int nsp32_proc_info (struct Scsi_Host *, char *, char **, off_t, int, int);
+#else
+static int nsp32_proc_info (char *, char **, off_t, int, int, int);
+#endif
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
+static int nsp32_detect (struct pci_dev *pdev);
+#else
+static int nsp32_detect (Scsi_Host_Template *);
+#endif
+static int nsp32_queuecommand(struct scsi_cmnd *,
+ void (*done)(struct scsi_cmnd *));
+static const char *nsp32_info (struct Scsi_Host *);
+static int nsp32_release (struct Scsi_Host *);
+
+/* SCSI error handler */
+static int nsp32_eh_abort (struct scsi_cmnd *);
+static int nsp32_eh_bus_reset (struct scsi_cmnd *);
+static int nsp32_eh_host_reset(struct scsi_cmnd *);
+
+/* generate SCSI message */
+static void nsp32_build_identify(struct scsi_cmnd *);
+static void nsp32_build_nop (struct scsi_cmnd *);
+static void nsp32_build_reject (struct scsi_cmnd *);
+static void nsp32_build_sdtr (struct scsi_cmnd *, unsigned char, unsigned char);
+
+/* SCSI message handler */
+static int nsp32_busfree_occur(struct scsi_cmnd *, unsigned short);
+static void nsp32_msgout_occur (struct scsi_cmnd *);
+static void nsp32_msgin_occur (struct scsi_cmnd *, unsigned long, unsigned short);
+
+static int nsp32_setup_sg_table (struct scsi_cmnd *);
+static int nsp32_selection_autopara(struct scsi_cmnd *);
+static int nsp32_selection_autoscsi(struct scsi_cmnd *);
+static void nsp32_scsi_done (struct scsi_cmnd *);
+static int nsp32_arbitration (struct scsi_cmnd *, unsigned int);
+static int nsp32_reselection (struct scsi_cmnd *, unsigned char);
+static void nsp32_adjust_busfree (struct scsi_cmnd *, unsigned int);
+static void nsp32_restart_autoscsi (struct scsi_cmnd *, unsigned short);
+
+/* SCSI SDTR */
+static void nsp32_analyze_sdtr (struct scsi_cmnd *);
+static int nsp32_search_period_entry(nsp32_hw_data *, nsp32_target *, unsigned char);
+static void nsp32_set_async (nsp32_hw_data *, nsp32_target *);
+static void nsp32_set_max_sync (nsp32_hw_data *, nsp32_target *, unsigned char *, unsigned char *);
+static void nsp32_set_sync_entry (nsp32_hw_data *, nsp32_target *, int, unsigned char);
+
+/* SCSI bus status handler */
+static void nsp32_wait_req (nsp32_hw_data *, int);
+static void nsp32_wait_sack (nsp32_hw_data *, int);
+static void nsp32_sack_assert (nsp32_hw_data *);
+static void nsp32_sack_negate (nsp32_hw_data *);
+static void nsp32_do_bus_reset(nsp32_hw_data *);
+
+/* hardware interrupt handler */
+static irqreturn_t do_nsp32_isr(int, void *, struct pt_regs *);
+
+/* initialize hardware */
+static int nsp32hw_init(nsp32_hw_data *);
+
+/* EEPROM handler */
+static int nsp32_getprom_param (nsp32_hw_data *);
+static int nsp32_getprom_at24 (nsp32_hw_data *);
+static int nsp32_getprom_c16 (nsp32_hw_data *);
+static void nsp32_prom_start (nsp32_hw_data *);
+static void nsp32_prom_stop (nsp32_hw_data *);
+static int nsp32_prom_read (nsp32_hw_data *, int);
+static int nsp32_prom_read_bit (nsp32_hw_data *);
+static void nsp32_prom_write_bit(nsp32_hw_data *, int);
+static void nsp32_prom_set (nsp32_hw_data *, int, int);
+static int nsp32_prom_get (nsp32_hw_data *, int);
+
+/* debug/warning/info message */
+static void nsp32_message (const char *, int, char *, char *, ...);
+#ifdef NSP32_DEBUG
+static void nsp32_dmessage(const char *, int, int, char *, ...);
+#endif
+
+/*
+ * max_sectors is currently limited up to 128.
+ */
+static struct scsi_host_template nsp32_template = {
+ .proc_name = "nsp32",
+ .name = "Workbit NinjaSCSI-32Bi/UDE",
+ .proc_info = nsp32_proc_info,
+ .info = nsp32_info,
+ .queuecommand = nsp32_queuecommand,
+ .can_queue = 1,
+ .sg_tablesize = NSP32_SG_SIZE,
+ .max_sectors = 128,
+ .cmd_per_lun = 1,
+ .this_id = NSP32_HOST_SCSIID,
+ .use_clustering = DISABLE_CLUSTERING,
+ .eh_abort_handler = nsp32_eh_abort,
+/* .eh_device_reset_handler = NULL, */
+ .eh_bus_reset_handler = nsp32_eh_bus_reset,
+ .eh_host_reset_handler = nsp32_eh_host_reset,
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,74))
+ .detect = nsp32_detect,
+ .release = nsp32_release,
+#endif
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,2))
+ .use_new_eh_code = 1,
+#else
+/* .highmem_io = 1, */
+#endif
+};
+
+#include "nsp32_io.h"
+
+/***********************************************************************
+ * debug, error print
+ */
+#ifndef NSP32_DEBUG
+# define NSP32_DEBUG_MASK 0x000000
+# define nsp32_msg(type, args...) nsp32_message ("", 0, (type), args)
+# define nsp32_dbg(mask, args...) /* */
+#else
+# define NSP32_DEBUG_MASK 0xffffff
+# define nsp32_msg(type, args...) \
+ nsp32_message (__FUNCTION__, __LINE__, (type), args)
+# define nsp32_dbg(mask, args...) \
+ nsp32_dmessage(__FUNCTION__, __LINE__, (mask), args)
+#endif
+
+#define NSP32_DEBUG_QUEUECOMMAND BIT(0)
+#define NSP32_DEBUG_REGISTER BIT(1)
+#define NSP32_DEBUG_AUTOSCSI BIT(2)
+#define NSP32_DEBUG_INTR BIT(3)
+#define NSP32_DEBUG_SGLIST BIT(4)
+#define NSP32_DEBUG_BUSFREE BIT(5)
+#define NSP32_DEBUG_CDB_CONTENTS BIT(6)
+#define NSP32_DEBUG_RESELECTION BIT(7)
+#define NSP32_DEBUG_MSGINOCCUR BIT(8)
+#define NSP32_DEBUG_EEPROM BIT(9)
+#define NSP32_DEBUG_MSGOUTOCCUR BIT(10)
+#define NSP32_DEBUG_BUSRESET BIT(11)
+#define NSP32_DEBUG_RESTART BIT(12)
+#define NSP32_DEBUG_SYNC BIT(13)
+#define NSP32_DEBUG_WAIT BIT(14)
+#define NSP32_DEBUG_TARGETFLAG BIT(15)
+#define NSP32_DEBUG_PROC BIT(16)
+#define NSP32_DEBUG_INIT BIT(17)
+#define NSP32_SPECIAL_PRINT_REGISTER BIT(20)
+
+#define NSP32_DEBUG_BUF_LEN 100
+
+static void nsp32_message(const char *func, int line, char *type, char *fmt, ...)
+{
+ va_list args;
+ char buf[NSP32_DEBUG_BUF_LEN];
+
+ va_start(args, fmt);
+ vsnprintf(buf, sizeof(buf), fmt, args);
+ va_end(args);
+
+#ifndef NSP32_DEBUG
+ printk("%snsp32: %s\n", type, buf);
+#else
+ printk("%snsp32: %s (%d): %s\n", type, func, line, buf);
+#endif
+}
+
+#ifdef NSP32_DEBUG
+static void nsp32_dmessage(const char *func, int line, int mask, char *fmt, ...)
+{
+ va_list args;
+ char buf[NSP32_DEBUG_BUF_LEN];
+
+ va_start(args, fmt);
+ vsnprintf(buf, sizeof(buf), fmt, args);
+ va_end(args);
+
+ if (mask & NSP32_DEBUG_MASK) {
+ printk("nsp32-debug: 0x%x %s (%d): %s\n", mask, func, line, buf);
+ }
+}
+#endif
+
+#ifdef NSP32_DEBUG
+# include "nsp32_debug.c"
+#else
+# define show_command(arg) /* */
+# define show_busphase(arg) /* */
+# define show_autophase(arg) /* */
+#endif
+
+/*
+ * IDENTIFY Message
+ */
+static void nsp32_build_identify(struct scsi_cmnd *SCpnt)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ int pos = data->msgout_len;
+ int mode = FALSE;
+
+ /* XXX: Auto DiscPriv detection is progressing... */
+ if (disc_priv == 0) {
+ /* mode = TRUE; */
+ }
+
+ data->msgoutbuf[pos] = IDENTIFY(mode, SCpnt->device->lun); pos++;
+
+ data->msgout_len = pos;
+}
+
+/*
+ * SDTR Message Routine
+ */
+static void nsp32_build_sdtr(struct scsi_cmnd *SCpnt,
+ unsigned char period,
+ unsigned char offset)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ int pos = data->msgout_len;
+
+ data->msgoutbuf[pos] = EXTENDED_MESSAGE; pos++;
+ data->msgoutbuf[pos] = EXTENDED_SDTR_LEN; pos++;
+ data->msgoutbuf[pos] = EXTENDED_SDTR; pos++;
+ data->msgoutbuf[pos] = period; pos++;
+ data->msgoutbuf[pos] = offset; pos++;
+
+ data->msgout_len = pos;
+}
+
+/*
+ * No Operation Message
+ */
+static void nsp32_build_nop(struct scsi_cmnd *SCpnt)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ int pos = data->msgout_len;
+
+ if (pos != 0) {
+ nsp32_msg(KERN_WARNING,
+ "Some messages are already contained!");
+ return;
+ }
+
+ data->msgoutbuf[pos] = NOP; pos++;
+ data->msgout_len = pos;
+}
+
+/*
+ * Reject Message
+ */
+static void nsp32_build_reject(struct scsi_cmnd *SCpnt)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ int pos = data->msgout_len;
+
+ data->msgoutbuf[pos] = MESSAGE_REJECT; pos++;
+ data->msgout_len = pos;
+}
+
+/*
+ * timer
+ */
+#if 0
+static void nsp32_start_timer(struct scsi_cmnd *SCpnt, int time)
+{
+ unsigned int base = SCpnt->host->io_port;
+
+ nsp32_dbg(NSP32_DEBUG_INTR, "timer=%d", time);
+
+ if (time & (~TIMER_CNT_MASK)) {
+ nsp32_dbg(NSP32_DEBUG_INTR, "timer set overflow");
+ }
+
+ nsp32_write2(base, TIMER_SET, time & TIMER_CNT_MASK);
+}
+#endif
+
+
+/*
+ * set SCSI command and other parameter to asic, and start selection phase
+ */
+static int nsp32_selection_autopara(struct scsi_cmnd *SCpnt)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ unsigned int base = SCpnt->device->host->io_port;
+ unsigned int host_id = SCpnt->device->host->this_id;
+ unsigned char target = SCpnt->device->id;
+ nsp32_autoparam *param = data->autoparam;
+ unsigned char phase;
+ int i, ret;
+ unsigned int msgout;
+ u16_le s;
+
+ nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "in");
+
+ /*
+ * check bus free
+ */
+ phase = nsp32_read1(base, SCSI_BUS_MONITOR);
+ if (phase != BUSMON_BUS_FREE) {
+ nsp32_msg(KERN_WARNING, "bus busy");
+ show_busphase(phase & BUSMON_PHASE_MASK);
+ SCpnt->result = DID_BUS_BUSY << 16;
+ return FALSE;
+ }
+
+ /*
+ * message out
+ *
+ * Note: If the range of msgout_len is 1 - 3, fill scsi_msgout.
+ * over 3 messages needs another routine.
+ */
+ if (data->msgout_len == 0) {
+ nsp32_msg(KERN_ERR, "SCSI MsgOut without any message!");
+ SCpnt->result = DID_ERROR << 16;
+ return FALSE;
+ } else if (data->msgout_len > 0 && data->msgout_len <= 3) {
+ msgout = 0;
+ for (i = 0; i < data->msgout_len; i++) {
+ /*
+ * the sending order of the message is:
+ * MCNT 3: MSG#0 -> MSG#1 -> MSG#2
+ * MCNT 2: MSG#1 -> MSG#2
+ * MCNT 1: MSG#2
+ */
+ msgout >>= 8;
+ msgout |= ((unsigned int)(data->msgoutbuf[i]) << 24);
+ }
+ msgout |= MV_VALID; /* MV valid */
+ msgout |= (unsigned int)data->msgout_len; /* len */
+ } else {
+ /* data->msgout_len > 3 */
+ msgout = 0;
+ }
+
+ // nsp_dbg(NSP32_DEBUG_AUTOSCSI, "sel time out=0x%x\n", nsp32_read2(base, SEL_TIME_OUT));
+ // nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME);
+
+ /*
+ * setup asic parameter
+ */
+ memset(param, 0, sizeof(nsp32_autoparam));
+
+ /* cdb */
+ for (i = 0; i < SCpnt->cmd_len; i++) {
+ param->cdb[4 * i] = SCpnt->cmnd[i];
+ }
+
+ /* outgoing messages */
+ param->msgout = cpu_to_le32(msgout);
+
+ /* syncreg, ackwidth, target id, SREQ sampling rate */
+ param->syncreg = data->cur_target->syncreg;
+ param->ackwidth = data->cur_target->ackwidth;
+ param->target_id = BIT(host_id) | BIT(target);
+ param->sample_reg = data->cur_target->sample_reg;
+
+ // nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "sample rate=0x%x\n", data->cur_target->sample_reg);
+
+ /* command control */
+ param->command_control = cpu_to_le16(CLEAR_CDB_FIFO_POINTER |
+ AUTOSCSI_START |
+ AUTO_MSGIN_00_OR_04 |
+ AUTO_MSGIN_02 |
+ AUTO_ATN );
+
+
+ /* transfer control */
+ s = 0;
+ switch (data->trans_method) {
+ case NSP32_TRANSFER_BUSMASTER:
+ s |= BM_START;
+ break;
+ case NSP32_TRANSFER_MMIO:
+ s |= CB_MMIO_MODE;
+ break;
+ case NSP32_TRANSFER_PIO:
+ s |= CB_IO_MODE;
+ break;
+ default:
+ nsp32_msg(KERN_ERR, "unknown trans_method");
+ break;
+ }
+ /*
+ * OR-ed BLIEND_MODE, FIFO intr is decreased, instead of PCI bus waits.
+ * For bus master transfer, it's taken off.
+ */
+ s |= (TRANSFER_GO | ALL_COUNTER_CLR);
+ param->transfer_control = cpu_to_le16(s);
+
+ /* sg table addr */
+ param->sgt_pointer = cpu_to_le32(data->cur_lunt->sglun_paddr);
+
+ /*
+ * transfer parameter to ASIC
+ */
+ nsp32_write4(base, SGT_ADR, data->auto_paddr);
+ nsp32_write2(base, COMMAND_CONTROL, CLEAR_CDB_FIFO_POINTER |
+ AUTO_PARAMETER );
+
+ /*
+ * Check arbitration
+ */
+ ret = nsp32_arbitration(SCpnt, base);
+
+ return ret;
+}
+
+
+/*
+ * Selection with AUTO SCSI (without AUTO PARAMETER)
+ */
+static int nsp32_selection_autoscsi(struct scsi_cmnd *SCpnt)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ unsigned int base = SCpnt->device->host->io_port;
+ unsigned int host_id = SCpnt->device->host->this_id;
+ unsigned char target = SCpnt->device->id;
+ unsigned char phase;
+ int status;
+ unsigned short command = 0;
+ unsigned int msgout = 0;
+ unsigned short execph;
+ int i;
+
+ nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "in");
+
+ /*
+ * IRQ disable
+ */
+ nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
+
+ /*
+ * check bus line
+ */
+ phase = nsp32_read1(base, SCSI_BUS_MONITOR);
+ if(((phase & BUSMON_BSY) == 1) || (phase & BUSMON_SEL) == 1) {
+ nsp32_msg(KERN_WARNING, "bus busy");
+ SCpnt->result = DID_BUS_BUSY << 16;
+ status = 1;
+ goto out;
+ }
+
+ /*
+ * clear execph
+ */
+ execph = nsp32_read2(base, SCSI_EXECUTE_PHASE);
+
+ /*
+ * clear FIFO counter to set CDBs
+ */
+ nsp32_write2(base, COMMAND_CONTROL, CLEAR_CDB_FIFO_POINTER);
+
+ /*
+ * set CDB0 - CDB15
+ */
+ for (i = 0; i < SCpnt->cmd_len; i++) {
+ nsp32_write1(base, COMMAND_DATA, SCpnt->cmnd[i]);
+ }
+ nsp32_dbg(NSP32_DEBUG_CDB_CONTENTS, "CDB[0]=[0x%x]", SCpnt->cmnd[0]);
+
+ /*
+ * set SCSIOUT LATCH(initiator)/TARGET(target) (OR-ed) ID
+ */
+ nsp32_write1(base, SCSI_OUT_LATCH_TARGET_ID, BIT(host_id) | BIT(target));
+
+ /*
+ * set SCSI MSGOUT REG
+ *
+ * Note: If the range of msgout_len is 1 - 3, fill scsi_msgout.
+ * over 3 messages needs another routine.
+ */
+ if (data->msgout_len == 0) {
+ nsp32_msg(KERN_ERR, "SCSI MsgOut without any message!");
+ SCpnt->result = DID_ERROR << 16;
+ status = 1;
+ goto out;
+ } else if (data->msgout_len > 0 && data->msgout_len <= 3) {
+ msgout = 0;
+ for (i = 0; i < data->msgout_len; i++) {
+ /*
+ * the sending order of the message is:
+ * MCNT 3: MSG#0 -> MSG#1 -> MSG#2
+ * MCNT 2: MSG#1 -> MSG#2
+ * MCNT 1: MSG#2
+ */
+ msgout >>= 8;
+ msgout |= ((unsigned int)(data->msgoutbuf[i]) << 24);
+ }
+ msgout |= MV_VALID; /* MV valid */
+ msgout |= (unsigned int)data->msgout_len; /* len */
+ nsp32_write4(base, SCSI_MSG_OUT, msgout);
+ } else {
+ /* data->msgout_len > 3 */
+ nsp32_write4(base, SCSI_MSG_OUT, 0);
+ }
+
+ /*
+ * set selection timeout(= 250ms)
+ */
+ nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME);
+
+ /*
+ * set SREQ hazard killer sampling rate
+ *
+ * TODO: sample_rate (BASE+0F) is 0 when internal clock = 40MHz.
+ * check other internal clock!
+ */
+ nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg);
+
+ /*
+ * clear Arbit
+ */
+ nsp32_write1(base, SET_ARBIT, ARBIT_CLEAR);
+
+ /*
+ * set SYNCREG
+ * Don't set BM_START_ADR before setting this register.
+ */
+ nsp32_write1(base, SYNC_REG, data->cur_target->syncreg);
+
+ /*
+ * set ACKWIDTH
+ */
+ nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth);
+
+ nsp32_dbg(NSP32_DEBUG_AUTOSCSI,
+ "syncreg=0x%x, ackwidth=0x%x, sgtpaddr=0x%x, id=0x%x",
+ nsp32_read1(base, SYNC_REG), nsp32_read1(base, ACK_WIDTH),
+ nsp32_read4(base, SGT_ADR), nsp32_read1(base, SCSI_OUT_LATCH_TARGET_ID));
+ nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "msgout_len=%d, msgout=0x%x",
+ data->msgout_len, msgout);
+
+ /*
+ * set SGT ADDR (physical address)
+ */
+ nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr);
+
+ /*
+ * set TRANSFER CONTROL REG
+ */
+ command = 0;
+ command |= (TRANSFER_GO | ALL_COUNTER_CLR);
+ if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
+ if (SCpnt->request_bufflen > 0) {
+ command |= BM_START;
+ }
+ } else if (data->trans_method & NSP32_TRANSFER_MMIO) {
+ command |= CB_MMIO_MODE;
+ } else if (data->trans_method & NSP32_TRANSFER_PIO) {
+ command |= CB_IO_MODE;
+ }
+ nsp32_write2(base, TRANSFER_CONTROL, command);
+
+ /*
+ * start AUTO SCSI, kick off arbitration
+ */
+ command = (CLEAR_CDB_FIFO_POINTER |
+ AUTOSCSI_START |
+ AUTO_MSGIN_00_OR_04 |
+ AUTO_MSGIN_02 |
+ AUTO_ATN );
+ nsp32_write2(base, COMMAND_CONTROL, command);
+
+ /*
+ * Check arbitration
+ */
+ status = nsp32_arbitration(SCpnt, base);
+
+ out:
+ /*
+ * IRQ enable
+ */
+ nsp32_write2(base, IRQ_CONTROL, 0);
+
+ return status;
+}
+
+
+/*
+ * Arbitration Status Check
+ *
+ * Note: Arbitration counter is waited during ARBIT_GO is not lifting.
+ * Using udelay(1) consumes CPU time and system time, but
+ * arbitration delay time is defined minimal 2.4us in SCSI
+ * specification, thus udelay works as coarse grained wait timer.
+ */
+static int nsp32_arbitration(struct scsi_cmnd *SCpnt, unsigned int base)
+{
+ unsigned char arbit;
+ int status = TRUE;
+ int time = 0;
+
+ do {
+ arbit = nsp32_read1(base, ARBIT_STATUS);
+ time++;
+ } while ((arbit & (ARBIT_WIN | ARBIT_FAIL)) == 0 &&
+ (time <= ARBIT_TIMEOUT_TIME));
+
+ nsp32_dbg(NSP32_DEBUG_AUTOSCSI,
+ "arbit: 0x%x, delay time: %d", arbit, time);
+
+ if (arbit & ARBIT_WIN) {
+ /* Arbitration succeeded */
+ SCpnt->result = DID_OK << 16;
+ nsp32_index_write1(base, EXT_PORT, LED_ON); /* PCI LED on */
+ } else if (arbit & ARBIT_FAIL) {
+ /* Arbitration failed */
+ SCpnt->result = DID_BUS_BUSY << 16;
+ status = FALSE;
+ } else {
+ /*
+ * unknown error or ARBIT_GO timeout,
+ * something lock up! guess no connection.
+ */
+ nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "arbit timeout");
+ SCpnt->result = DID_NO_CONNECT << 16;
+ status = FALSE;
+ }
+
+ /*
+ * clear Arbit
+ */
+ nsp32_write1(base, SET_ARBIT, ARBIT_CLEAR);
+
+ return status;
+}
+
+
+/*
+ * reselection
+ *
+ * Note: This reselection routine is called from msgin_occur,
+ * reselection target id&lun must be already set.
+ * SCSI-2 says IDENTIFY implies RESTORE_POINTER operation.
+ */
+static int nsp32_reselection(struct scsi_cmnd *SCpnt, unsigned char newlun)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ unsigned int host_id = SCpnt->device->host->this_id;
+ unsigned int base = SCpnt->device->host->io_port;
+ unsigned char tmpid, newid;
+
+ nsp32_dbg(NSP32_DEBUG_RESELECTION, "enter");
+
+ /*
+ * calculate reselected SCSI ID
+ */
+ tmpid = nsp32_read1(base, RESELECT_ID);
+ tmpid &= (~BIT(host_id));
+ newid = 0;
+ while (tmpid) {
+ if (tmpid & 1) {
+ break;
+ }
+ tmpid >>= 1;
+ newid++;
+ }
+
+ /*
+ * If reselected New ID:LUN is not existed
+ * or current nexus is not existed, unexpected
+ * reselection is occurred. Send reject message.
+ */
+ if (newid >= ARRAY_SIZE(data->lunt) || newlun >= ARRAY_SIZE(data->lunt[0])) {
+ nsp32_msg(KERN_WARNING, "unknown id/lun");
+ return FALSE;
+ } else if(data->lunt[newid][newlun].SCpnt == NULL) {
+ nsp32_msg(KERN_WARNING, "no SCSI command is processing");
+ return FALSE;
+ }
+
+ data->cur_id = newid;
+ data->cur_lun = newlun;
+ data->cur_target = &(data->target[newid]);
+ data->cur_lunt = &(data->lunt[newid][newlun]);
+
+ /* reset SACK/SavedACK counter (or ALL clear?) */
+ nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK);
+
+ return TRUE;
+}
+
+
+/*
+ * nsp32_setup_sg_table - build scatter gather list for transfer data
+ * with bus master.
+ *
+ * Note: NinjaSCSI-32Bi/UDE bus master can not transfer over 64KB at a time.
+ */
+static int nsp32_setup_sg_table(struct scsi_cmnd *SCpnt)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ struct scatterlist *sgl;
+ nsp32_sgtable *sgt = data->cur_lunt->sglun->sgt;
+ int num, i;
+ u32_le l;
+
+ if (SCpnt->request_bufflen == 0) {
+ return TRUE;
+ }
+
+ if (sgt == NULL) {
+ nsp32_dbg(NSP32_DEBUG_SGLIST, "SGT == null");
+ return FALSE;
+ }
+
+ if (SCpnt->use_sg) {
+ sgl = (struct scatterlist *)SCpnt->request_buffer;
+ num = pci_map_sg(data->Pci, sgl, SCpnt->use_sg,
+ SCpnt->sc_data_direction);
+ for (i = 0; i < num; i++) {
+ /*
+ * Build nsp32_sglist, substitute sg dma addresses.
+ */
+ sgt[i].addr = cpu_to_le32(sg_dma_address(sgl));
+ sgt[i].len = cpu_to_le32(sg_dma_len(sgl));
+ sgl++;
+
+ if (le32_to_cpu(sgt[i].len) > 0x10000) {
+ nsp32_msg(KERN_ERR,
+ "can't transfer over 64KB at a time, size=0x%lx", le32_to_cpu(sgt[i].len));
+ return FALSE;
+ }
+ nsp32_dbg(NSP32_DEBUG_SGLIST,
+ "num 0x%x : addr 0x%lx len 0x%lx",
+ i,
+ le32_to_cpu(sgt[i].addr),
+ le32_to_cpu(sgt[i].len ));
+ }
+
+ /* set end mark */
+ l = le32_to_cpu(sgt[num-1].len);
+ sgt[num-1].len = cpu_to_le32(l | SGTEND);
+
+ } else {
+ SCpnt->SCp.have_data_in = pci_map_single(data->Pci,
+ SCpnt->request_buffer, SCpnt->request_bufflen,
+ SCpnt->sc_data_direction);
+
+ sgt[0].addr = cpu_to_le32(SCpnt->SCp.have_data_in);
+ sgt[0].len = cpu_to_le32(SCpnt->request_bufflen | SGTEND); /* set end mark */
+
+ if (SCpnt->request_bufflen > 0x10000) {
+ nsp32_msg(KERN_ERR,
+ "can't transfer over 64KB at a time, size=0x%lx", SCpnt->request_bufflen);
+ return FALSE;
+ }
+ nsp32_dbg(NSP32_DEBUG_SGLIST, "single : addr 0x%lx len=0x%lx",
+ le32_to_cpu(sgt[0].addr),
+ le32_to_cpu(sgt[0].len ));
+ }
+
+ return TRUE;
+}
+
+static int nsp32_queuecommand(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ nsp32_target *target;
+ nsp32_lunt *cur_lunt;
+ int ret;
+
+ nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
+ "enter. target: 0x%x LUN: 0x%x cmnd: 0x%x cmndlen: 0x%x "
+ "use_sg: 0x%x reqbuf: 0x%lx reqlen: 0x%x",
+ SCpnt->device->id, SCpnt->device->lun, SCpnt->cmnd[0], SCpnt->cmd_len,
+ SCpnt->use_sg, SCpnt->request_buffer, SCpnt->request_bufflen);
+
+ if (data->CurrentSC != NULL) {
+ nsp32_msg(KERN_ERR, "Currentsc != NULL. Cancel this command request");
+ data->CurrentSC = NULL;
+ SCpnt->result = DID_NO_CONNECT << 16;
+ done(SCpnt);
+ return 0;
+ }
+
+ /* check target ID is not same as this initiator ID */
+ if (SCpnt->device->id == SCpnt->device->host->this_id) {
+ nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "terget==host???");
+ SCpnt->result = DID_BAD_TARGET << 16;
+ done(SCpnt);
+ return 0;
+ }
+
+ /* check target LUN is allowable value */
+ if (SCpnt->device->lun >= MAX_LUN) {
+ nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "no more lun");
+ SCpnt->result = DID_BAD_TARGET << 16;
+ done(SCpnt);
+ return 0;
+ }
+
+ show_command(SCpnt);
+
+ SCpnt->scsi_done = done;
+ data->CurrentSC = SCpnt;
+ SCpnt->SCp.Status = CHECK_CONDITION;
+ SCpnt->SCp.Message = 0;
+ SCpnt->resid = SCpnt->request_bufflen;
+
+ SCpnt->SCp.ptr = (char *) SCpnt->request_buffer;
+ SCpnt->SCp.this_residual = SCpnt->request_bufflen;
+ SCpnt->SCp.buffer = NULL;
+ SCpnt->SCp.buffers_residual = 0;
+
+ /* initialize data */
+ data->msgout_len = 0;
+ data->msgin_len = 0;
+ cur_lunt = &(data->lunt[SCpnt->device->id][SCpnt->device->lun]);
+ cur_lunt->SCpnt = SCpnt;
+ cur_lunt->save_datp = 0;
+ cur_lunt->msgin03 = FALSE;
+ data->cur_lunt = cur_lunt;
+ data->cur_id = SCpnt->device->id;
+ data->cur_lun = SCpnt->device->lun;
+
+ ret = nsp32_setup_sg_table(SCpnt);
+ if (ret == FALSE) {
+ nsp32_msg(KERN_ERR, "SGT fail");
+ SCpnt->result = DID_ERROR << 16;
+ nsp32_scsi_done(SCpnt);
+ return 0;
+ }
+
+ /* Build IDENTIFY */
+ nsp32_build_identify(SCpnt);
+
+ /*
+ * If target is the first time to transfer after the reset
+ * (target don't have SDTR_DONE and SDTR_INITIATOR), sync
+ * message SDTR is needed to do synchronous transfer.
+ */
+ target = &data->target[SCpnt->device->id];
+ data->cur_target = target;
+
+ if (!(target->sync_flag & (SDTR_DONE | SDTR_INITIATOR | SDTR_TARGET))) {
+ unsigned char period, offset;
+
+ if (trans_mode != ASYNC_MODE) {
+ nsp32_set_max_sync(data, target, &period, &offset);
+ nsp32_build_sdtr(SCpnt, period, offset);
+ target->sync_flag |= SDTR_INITIATOR;
+ } else {
+ nsp32_set_async(data, target);
+ target->sync_flag |= SDTR_DONE;
+ }
+
+ nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
+ "SDTR: entry: %d start_period: 0x%x offset: 0x%x\n",
+ target->limit_entry, period, offset);
+ } else if (target->sync_flag & SDTR_INITIATOR) {
+ /*
+ * It was negotiating SDTR with target, sending from the
+ * initiator, but there are no chance to remove this flag.
+ * Set async because we don't get proper negotiation.
+ */
+ nsp32_set_async(data, target);
+ target->sync_flag &= ~SDTR_INITIATOR;
+ target->sync_flag |= SDTR_DONE;
+
+ nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
+ "SDTR_INITIATOR: fall back to async");
+ } else if (target->sync_flag & SDTR_TARGET) {
+ /*
+ * It was negotiating SDTR with target, sending from target,
+ * but there are no chance to remove this flag. Set async
+ * because we don't get proper negotiation.
+ */
+ nsp32_set_async(data, target);
+ target->sync_flag &= ~SDTR_TARGET;
+ target->sync_flag |= SDTR_DONE;
+
+ nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
+ "Unknown SDTR from target is reached, fall back to async.");
+ }
+
+ nsp32_dbg(NSP32_DEBUG_TARGETFLAG,
+ "target: %d sync_flag: 0x%x syncreg: 0x%x ackwidth: 0x%x",
+ SCpnt->device->id, target->sync_flag, target->syncreg,
+ target->ackwidth);
+
+ /* Selection */
+ if (auto_param == 0) {
+ ret = nsp32_selection_autopara(SCpnt);
+ } else {
+ ret = nsp32_selection_autoscsi(SCpnt);
+ }
+
+ if (ret != TRUE) {
+ nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "selection fail");
+ nsp32_scsi_done(SCpnt);
+ }
+
+ return 0;
+}
+
+/* initialize asic */
+static int nsp32hw_init(nsp32_hw_data *data)
+{
+ unsigned int base = data->BaseAddress;
+ unsigned short irq_stat;
+ unsigned long lc_reg;
+ unsigned char power;
+
+ lc_reg = nsp32_index_read4(base, CFG_LATE_CACHE);
+ if ((lc_reg & 0xff00) == 0) {
+ lc_reg |= (0x20 << 8);
+ nsp32_index_write2(base, CFG_LATE_CACHE, lc_reg & 0xffff);
+ }
+
+ nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
+ nsp32_write2(base, TRANSFER_CONTROL, 0);
+ nsp32_write4(base, BM_CNT, 0);
+ nsp32_write2(base, SCSI_EXECUTE_PHASE, 0);
+
+ do {
+ irq_stat = nsp32_read2(base, IRQ_STATUS);
+ nsp32_dbg(NSP32_DEBUG_INIT, "irq_stat 0x%x", irq_stat);
+ } while (irq_stat & IRQSTATUS_ANY_IRQ);
+
+ /*
+ * Fill FIFO_FULL_SHLD, FIFO_EMPTY_SHLD. Below parameter is
+ * designated by specification.
+ */
+ if ((data->trans_method & NSP32_TRANSFER_PIO) ||
+ (data->trans_method & NSP32_TRANSFER_MMIO)) {
+ nsp32_index_write1(base, FIFO_FULL_SHLD_COUNT, 0x40);
+ nsp32_index_write1(base, FIFO_EMPTY_SHLD_COUNT, 0x40);
+ } else if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
+ nsp32_index_write1(base, FIFO_FULL_SHLD_COUNT, 0x10);
+ nsp32_index_write1(base, FIFO_EMPTY_SHLD_COUNT, 0x60);
+ } else {
+ nsp32_dbg(NSP32_DEBUG_INIT, "unknown transfer mode");
+ }
+
+ nsp32_dbg(NSP32_DEBUG_INIT, "full 0x%x emp 0x%x",
+ nsp32_index_read1(base, FIFO_FULL_SHLD_COUNT),
+ nsp32_index_read1(base, FIFO_EMPTY_SHLD_COUNT));
+
+ nsp32_index_write1(base, CLOCK_DIV, data->clock);
+ nsp32_index_write1(base, BM_CYCLE, MEMRD_CMD1 | SGT_AUTO_PARA_MEMED_CMD);
+ nsp32_write1(base, PARITY_CONTROL, 0); /* parity check is disable */
+
+ /*
+ * initialize MISC_WRRD register
+ *
+ * Note: Designated parameters is obeyed as following:
+ * MISC_SCSI_DIRECTION_DETECTOR_SELECT: It must be set.
+ * MISC_MASTER_TERMINATION_SELECT: It must be set.
+ * MISC_BMREQ_NEGATE_TIMING_SEL: It should be set.
+ * MISC_AUTOSEL_TIMING_SEL: It should be set.
+ * MISC_BMSTOP_CHANGE2_NONDATA_PHASE: It should be set.
+ * MISC_DELAYED_BMSTART: It's selected for safety.
+ *
+ * Note: If MISC_BMSTOP_CHANGE2_NONDATA_PHASE is set, then
+ * we have to set TRANSFERCONTROL_BM_START as 0 and set
+ * appropriate value before restarting bus master transfer.
+ */
+ nsp32_index_write2(base, MISC_WR,
+ (SCSI_DIRECTION_DETECTOR_SELECT |
+ DELAYED_BMSTART |
+ MASTER_TERMINATION_SELECT |
+ BMREQ_NEGATE_TIMING_SEL |
+ AUTOSEL_TIMING_SEL |
+ BMSTOP_CHANGE2_NONDATA_PHASE));
+
+ nsp32_index_write1(base, TERM_PWR_CONTROL, 0);
+ power = nsp32_index_read1(base, TERM_PWR_CONTROL);
+ if (!(power & SENSE)) {
+ nsp32_msg(KERN_INFO, "term power on");
+ nsp32_index_write1(base, TERM_PWR_CONTROL, BPWR);
+ }
+
+ nsp32_write2(base, TIMER_SET, TIMER_STOP);
+ nsp32_write2(base, TIMER_SET, TIMER_STOP); /* Required 2 times */
+
+ nsp32_write1(base, SYNC_REG, 0);
+ nsp32_write1(base, ACK_WIDTH, 0);
+ nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME);
+
+ /*
+ * enable to select designated IRQ (except for
+ * IRQSELECT_SERR, IRQSELECT_PERR, IRQSELECT_BMCNTERR)
+ */
+ nsp32_index_write2(base, IRQ_SELECT, IRQSELECT_TIMER_IRQ |
+ IRQSELECT_SCSIRESET_IRQ |
+ IRQSELECT_FIFO_SHLD_IRQ |
+ IRQSELECT_RESELECT_IRQ |
+ IRQSELECT_PHASE_CHANGE_IRQ |
+ IRQSELECT_AUTO_SCSI_SEQ_IRQ |
+ // IRQSELECT_BMCNTERR_IRQ |
+ IRQSELECT_TARGET_ABORT_IRQ |
+ IRQSELECT_MASTER_ABORT_IRQ );
+ nsp32_write2(base, IRQ_CONTROL, 0);
+
+ /* PCI LED off */
+ nsp32_index_write1(base, EXT_PORT_DDR, LED_OFF);
+ nsp32_index_write1(base, EXT_PORT, LED_OFF);
+
+ return TRUE;
+}
+
+
+/* interrupt routine */
+static irqreturn_t do_nsp32_isr(int irq, void *dev_id, struct pt_regs *regs)
+{
+ nsp32_hw_data *data = dev_id;
+ unsigned int base = data->BaseAddress;
+ struct scsi_cmnd *SCpnt = data->CurrentSC;
+ unsigned short auto_stat, irq_stat, trans_stat;
+ unsigned char busmon, busphase;
+ unsigned long flags;
+ int ret;
+ int handled = 0;
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ struct Scsi_Host *host = data->Host;
+ spin_lock_irqsave(host->host_lock, flags);
+#else
+ spin_lock_irqsave(&io_request_lock, flags);
+#endif
+
+ /*
+ * IRQ check, then enable IRQ mask
+ */
+ irq_stat = nsp32_read2(base, IRQ_STATUS);
+ nsp32_dbg(NSP32_DEBUG_INTR,
+ "enter IRQ: %d, IRQstatus: 0x%x", irq, irq_stat);
+ /* is this interrupt comes from Ninja asic? */
+ if ((irq_stat & IRQSTATUS_ANY_IRQ) == 0) {
+ nsp32_dbg(NSP32_DEBUG_INTR, "shared interrupt: irq other 0x%x", irq_stat);
+ goto out2;
+ }
+ handled = 1;
+ nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
+
+ busmon = nsp32_read1(base, SCSI_BUS_MONITOR);
+ busphase = busmon & BUSMON_PHASE_MASK;
+
+ trans_stat = nsp32_read2(base, TRANSFER_STATUS);
+ if ((irq_stat == 0xffff) && (trans_stat == 0xffff)) {
+ nsp32_msg(KERN_INFO, "card disconnect");
+ if (data->CurrentSC != NULL) {
+ nsp32_msg(KERN_INFO, "clean up current SCSI command");
+ SCpnt->result = DID_BAD_TARGET << 16;
+ nsp32_scsi_done(SCpnt);
+ }
+ goto out;
+ }
+
+ /* Timer IRQ */
+ if (irq_stat & IRQSTATUS_TIMER_IRQ) {
+ nsp32_dbg(NSP32_DEBUG_INTR, "timer stop");
+ nsp32_write2(base, TIMER_SET, TIMER_STOP);
+ goto out;
+ }
+
+ /* SCSI reset */
+ if (irq_stat & IRQSTATUS_SCSIRESET_IRQ) {
+ nsp32_msg(KERN_INFO, "detected someone do bus reset");
+ nsp32_do_bus_reset(data);
+ if (SCpnt != NULL) {
+ SCpnt->result = DID_RESET << 16;
+ nsp32_scsi_done(SCpnt);
+ }
+ goto out;
+ }
+
+ if (SCpnt == NULL) {
+ nsp32_msg(KERN_WARNING, "SCpnt==NULL this can't be happened");
+ nsp32_msg(KERN_WARNING, "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
+ goto out;
+ }
+
+ /*
+ * AutoSCSI Interrupt.
+ * Note: This interrupt is occurred when AutoSCSI is finished. Then
+ * check SCSIEXECUTEPHASE, and do appropriate action. Each phases are
+ * recorded when AutoSCSI sequencer has been processed.
+ */
+ if(irq_stat & IRQSTATUS_AUTOSCSI_IRQ) {
+ /* getting SCSI executed phase */
+ auto_stat = nsp32_read2(base, SCSI_EXECUTE_PHASE);
+ nsp32_write2(base, SCSI_EXECUTE_PHASE, 0);
+
+ /* Selection Timeout, go busfree phase. */
+ if (auto_stat & SELECTION_TIMEOUT) {
+ nsp32_dbg(NSP32_DEBUG_INTR,
+ "selection timeout occurred");
+
+ SCpnt->result = DID_TIME_OUT << 16;
+ nsp32_scsi_done(SCpnt);
+ goto out;
+ }
+
+ if (auto_stat & MSGOUT_PHASE) {
+ /*
+ * MsgOut phase was processed.
+ * If MSG_IN_OCCUER is not set, then MsgOut phase is
+ * completed. Thus, msgout_len must reset. Otherwise,
+ * nothing to do here. If MSG_OUT_OCCUER is occurred,
+ * then we will encounter the condition and check.
+ */
+ if (!(auto_stat & MSG_IN_OCCUER) &&
+ (data->msgout_len <= 3)) {
+ /*
+ * !MSG_IN_OCCUER && msgout_len <=3
+ * ---> AutoSCSI with MSGOUTreg is processed.
+ */
+ data->msgout_len = 0;
+ };
+
+ nsp32_dbg(NSP32_DEBUG_INTR, "MsgOut phase processed");
+ }
+
+ if ((auto_stat & DATA_IN_PHASE) &&
+ (SCpnt->resid > 0) &&
+ ((nsp32_read2(base, FIFO_REST_CNT) & FIFO_REST_MASK) != 0)) {
+ printk( "auto+fifo\n");
+ //nsp32_pio_read(SCpnt);
+ }
+
+ if (auto_stat & (DATA_IN_PHASE | DATA_OUT_PHASE)) {
+ /* DATA_IN_PHASE/DATA_OUT_PHASE was processed. */
+ nsp32_dbg(NSP32_DEBUG_INTR,
+ "Data in/out phase processed");
+
+ /* read BMCNT, SGT pointer addr */
+ nsp32_dbg(NSP32_DEBUG_INTR, "BMCNT=0x%lx",
+ nsp32_read4(base, BM_CNT));
+ nsp32_dbg(NSP32_DEBUG_INTR, "addr=0x%lx",
+ nsp32_read4(base, SGT_ADR));
+ nsp32_dbg(NSP32_DEBUG_INTR, "SACK=0x%lx",
+ nsp32_read4(base, SACK_CNT));
+ nsp32_dbg(NSP32_DEBUG_INTR, "SSACK=0x%lx",
+ nsp32_read4(base, SAVED_SACK_CNT));
+
+ SCpnt->resid = 0; /* all data transfered! */
+ }
+
+ /*
+ * MsgIn Occur
+ */
+ if (auto_stat & MSG_IN_OCCUER) {
+ nsp32_msgin_occur(SCpnt, irq_stat, auto_stat);
+ }
+
+ /*
+ * MsgOut Occur
+ */
+ if (auto_stat & MSG_OUT_OCCUER) {
+ nsp32_msgout_occur(SCpnt);
+ }
+
+ /*
+ * Bus Free Occur
+ */
+ if (auto_stat & BUS_FREE_OCCUER) {
+ ret = nsp32_busfree_occur(SCpnt, auto_stat);
+ if (ret == TRUE) {
+ goto out;
+ }
+ }
+
+ if (auto_stat & STATUS_PHASE) {
+ /*
+ * Read CSB and substitute CSB for SCpnt->result
+ * to save status phase stutas byte.
+ * scsi error handler checks host_byte (DID_*:
+ * low level driver to indicate status), then checks
+ * status_byte (SCSI status byte).
+ */
+ SCpnt->result = (int)nsp32_read1(base, SCSI_CSB_IN);
+ }
+
+ if (auto_stat & ILLEGAL_PHASE) {
+ /* Illegal phase is detected. SACK is not back. */
+ nsp32_msg(KERN_WARNING,
+ "AUTO SCSI ILLEGAL PHASE OCCUR!!!!");
+
+ /* TODO: currently we don't have any action... bus reset? */
+
+ /*
+ * To send back SACK, assert, wait, and negate.
+ */
+ nsp32_sack_assert(data);
+ nsp32_wait_req(data, NEGATE);
+ nsp32_sack_negate(data);
+
+ }
+
+ if (auto_stat & COMMAND_PHASE) {
+ /* nothing to do */
+ nsp32_dbg(NSP32_DEBUG_INTR, "Command phase processed");
+ }
+
+ if (auto_stat & AUTOSCSI_BUSY) {
+ /* AutoSCSI is running */
+ }
+
+ show_autophase(auto_stat);
+ }
+
+ /* FIFO_SHLD_IRQ */
+ if (irq_stat & IRQSTATUS_FIFO_SHLD_IRQ) {
+ nsp32_dbg(NSP32_DEBUG_INTR, "FIFO IRQ");
+
+ switch(busphase) {
+ case BUSPHASE_DATA_OUT:
+ nsp32_dbg(NSP32_DEBUG_INTR, "fifo/write");
+
+ //nsp32_pio_write(SCpnt);
+
+ break;
+
+ case BUSPHASE_DATA_IN:
+ nsp32_dbg(NSP32_DEBUG_INTR, "fifo/read");
+
+ //nsp32_pio_read(SCpnt);
+
+ break;
+
+ case BUSPHASE_STATUS:
+ nsp32_dbg(NSP32_DEBUG_INTR, "fifo/status");
+
+ SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN);
+
+ break;
+ default:
+ nsp32_dbg(NSP32_DEBUG_INTR, "fifo/other phase");
+ nsp32_dbg(NSP32_DEBUG_INTR, "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
+ show_busphase(busphase);
+ break;
+ }
+
+ goto out;
+ }
+
+ /* Phase Change IRQ */
+ if (irq_stat & IRQSTATUS_PHASE_CHANGE_IRQ) {
+ nsp32_dbg(NSP32_DEBUG_INTR, "phase change IRQ");
+
+ switch(busphase) {
+ case BUSPHASE_MESSAGE_IN:
+ nsp32_dbg(NSP32_DEBUG_INTR, "phase chg/msg in");
+ nsp32_msgin_occur(SCpnt, irq_stat, 0);
+ break;
+ default:
+ nsp32_msg(KERN_WARNING, "phase chg/other phase?");
+ nsp32_msg(KERN_WARNING, "irq_stat=0x%x trans_stat=0x%x\n",
+ irq_stat, trans_stat);
+ show_busphase(busphase);
+ break;
+ }
+ goto out;
+ }
+
+ /* PCI_IRQ */
+ if (irq_stat & IRQSTATUS_PCI_IRQ) {
+ nsp32_dbg(NSP32_DEBUG_INTR, "PCI IRQ occurred");
+ /* Do nothing */
+ }
+
+ /* BMCNTERR_IRQ */
+ if (irq_stat & IRQSTATUS_BMCNTERR_IRQ) {
+ nsp32_msg(KERN_ERR, "Received unexpected BMCNTERR IRQ! ");
+ /*
+ * TODO: To be implemented improving bus master
+ * transfer reliablity when BMCNTERR is occurred in
+ * AutoSCSI phase described in specification.
+ */
+ }
+
+#if 0
+ nsp32_dbg(NSP32_DEBUG_INTR,
+ "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
+ show_busphase(busphase);
+#endif
+
+ out:
+ /* disable IRQ mask */
+ nsp32_write2(base, IRQ_CONTROL, 0);
+
+ out2:
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
+ spin_unlock_irqrestore(host->host_lock, flags);
+#else
+ spin_unlock_irqrestore(&io_request_lock, flags);
+#endif
+
+ nsp32_dbg(NSP32_DEBUG_INTR, "exit");
+
+ return IRQ_RETVAL(handled);
+}
+
+#undef SPRINTF
+#define SPRINTF(args...) \
+ do { \
+ if(length > (pos - buffer)) { \
+ pos += snprintf(pos, length - (pos - buffer) + 1, ## args); \
+ nsp32_dbg(NSP32_DEBUG_PROC, "buffer=0x%p pos=0x%p length=%d %d\n", buffer, pos, length, length - (pos - buffer));\
+ } \
+ } while(0)
+static int nsp32_proc_info(
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
+ struct Scsi_Host *host,
+#endif
+ char *buffer,
+ char **start,
+ off_t offset,
+ int length,
+#if !(LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
+ int hostno,
+#endif
+ int inout)
+{
+ char *pos = buffer;
+ int thislength;
+ unsigned long flags;
+ nsp32_hw_data *data;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
+ int hostno;
+#else
+ struct Scsi_Host *host;
+#endif
+ unsigned int base;
+ unsigned char mode_reg;
+ int id, speed;
+ long model;
+
+ /* Write is not supported, just return. */
+ if (inout == TRUE) {
+ return -EINVAL;
+ }
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
+ hostno = host->host_no;
+#else
+ /* search this HBA host */
+ host = scsi_host_hn_get(hostno);
+ if (host == NULL) {
+ return -ESRCH;
+ }
+#endif
+ data = (nsp32_hw_data *)host->hostdata;
+ base = host->io_port;
+
+ SPRINTF("NinjaSCSI-32 status\n\n");
+ SPRINTF("Driver version: %s, $Revision: 1.33 $\n", nsp32_release_version);
+ SPRINTF("SCSI host No.: %d\n", hostno);
+ SPRINTF("IRQ: %d\n", host->irq);
+ SPRINTF("IO: 0x%lx-0x%lx\n", host->io_port, host->io_port + host->n_io_port - 1);
+ SPRINTF("MMIO(virtual address): 0x%lx-0x%lx\n", host->base, host->base + data->MmioLength - 1);
+ SPRINTF("sg_tablesize: %d\n", host->sg_tablesize);
+ SPRINTF("Chip revision: 0x%x\n", (nsp32_read2(base, INDEX_REG) >> 8) & 0xff);
+
+ mode_reg = nsp32_index_read1(base, CHIP_MODE);
+ model = data->pci_devid->driver_data;
+
+#ifdef CONFIG_PM
+ SPRINTF("Power Management: %s\n", (mode_reg & OPTF) ? "yes" : "no");
+#endif
+ SPRINTF("OEM: %ld, %s\n", (mode_reg & (OEM0|OEM1)), nsp32_model[model]);
+
+ spin_lock_irqsave(&(data->Lock), flags);
+ SPRINTF("CurrentSC: 0x%p\n\n", data->CurrentSC);
+ spin_unlock_irqrestore(&(data->Lock), flags);
+
+
+ SPRINTF("SDTR status\n");
+ for (id = 0; id < ARRAY_SIZE(data->target); id++) {
+
+ SPRINTF("id %d: ", id);
+
+ if (id == host->this_id) {
+ SPRINTF("----- NinjaSCSI-32 host adapter\n");
+ continue;
+ }
+
+ if (data->target[id].sync_flag == SDTR_DONE) {
+ if (data->target[id].period == 0 &&
+ data->target[id].offset == ASYNC_OFFSET ) {
+ SPRINTF("async");
+ } else {
+ SPRINTF(" sync");
+ }
+ } else {
+ SPRINTF(" none");
+ }
+
+ if (data->target[id].period != 0) {
+
+ speed = 1000000 / (data->target[id].period * 4);
+
+ SPRINTF(" transfer %d.%dMB/s, offset %d",
+ speed / 1000,
+ speed % 1000,
+ data->target[id].offset
+ );
+ }
+ SPRINTF("\n");
+ }
+
+
+ thislength = pos - (buffer + offset);
+
+ if(thislength < 0) {
+ *start = NULL;
+ return 0;
+ }
+
+
+ thislength = min(thislength, length);
+ *start = buffer + offset;
+
+ return thislength;
+}
+#undef SPRINTF
+
+
+
+/*
+ * Reset parameters and call scsi_done for data->cur_lunt.
+ * Be careful setting SCpnt->result = DID_* before calling this function.
+ */
+static void nsp32_scsi_done(struct scsi_cmnd *SCpnt)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ unsigned int base = SCpnt->device->host->io_port;
+
+ /*
+ * unmap pci
+ */
+ if (SCpnt->request_bufflen == 0) {
+ goto skip;
+ }
+
+ if (SCpnt->use_sg) {
+ pci_unmap_sg(data->Pci,
+ (struct scatterlist *)SCpnt->buffer,
+ SCpnt->use_sg, SCpnt->sc_data_direction);
+ } else {
+ pci_unmap_single(data->Pci,
+ (u32)SCpnt->SCp.have_data_in,
+ SCpnt->request_bufflen,
+ SCpnt->sc_data_direction);
+ }
+
+ skip:
+ /*
+ * clear TRANSFERCONTROL_BM_START
+ */
+ nsp32_write2(base, TRANSFER_CONTROL, 0);
+ nsp32_write4(base, BM_CNT, 0);
+
+ /*
+ * call scsi_done
+ */
+ (*SCpnt->scsi_done)(SCpnt);
+
+ /*
+ * reset parameters
+ */
+ data->cur_lunt->SCpnt = NULL;
+ data->cur_lunt = NULL;
+ data->cur_target = NULL;
+ data->CurrentSC = NULL;
+}
+
+
+/*
+ * Bus Free Occur
+ *
+ * Current Phase is BUSFREE. AutoSCSI is automatically execute BUSFREE phase
+ * with ACK reply when below condition is matched:
+ * MsgIn 00: Command Complete.
+ * MsgIn 02: Save Data Pointer.
+ * MsgIn 04: Diconnect.
+ * In other case, unexpected BUSFREE is detected.
+ */
+static int nsp32_busfree_occur(struct scsi_cmnd *SCpnt, unsigned short execph)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ unsigned int base = SCpnt->device->host->io_port;
+
+ nsp32_dbg(NSP32_DEBUG_BUSFREE, "enter execph=0x%x", execph);
+ show_autophase(execph);
+
+ nsp32_write4(base, BM_CNT, 0);
+ nsp32_write2(base, TRANSFER_CONTROL, 0);
+
+ /*
+ * MsgIn 02: Save Data Pointer
+ *
+ * VALID:
+ * Save Data Pointer is received. Adjust pointer.
+ *
+ * NO-VALID:
+ * SCSI-3 says if Save Data Pointer is not received, then we restart
+ * processing and we can't adjust any SCSI data pointer in next data
+ * phase.
+ */
+ if (execph & MSGIN_02_VALID) {
+ nsp32_dbg(NSP32_DEBUG_BUSFREE, "MsgIn02_Valid");
+
+ /*
+ * Check sack_cnt/saved_sack_cnt, then adjust sg table if
+ * needed.
+ */
+ if (!(execph & MSGIN_00_VALID) &&
+ ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE))) {
+ unsigned int sacklen, s_sacklen;
+
+ /*
+ * Read SACK count and SAVEDSACK count, then compare.
+ */
+ sacklen = nsp32_read4(base, SACK_CNT );
+ s_sacklen = nsp32_read4(base, SAVED_SACK_CNT);
+
+ /*
+ * If SAVEDSACKCNT == 0, it means SavedDataPointer is
+ * come after data transfering.
+ */
+ if (s_sacklen > 0) {
+ /*
+ * Comparing between sack and savedsack to
+ * check the condition of AutoMsgIn03.
+ *
+ * If they are same, set msgin03 == TRUE,
+ * COMMANDCONTROL_AUTO_MSGIN_03 is enabled at
+ * reselection. On the other hand, if they
+ * aren't same, set msgin03 == FALSE, and
+ * COMMANDCONTROL_AUTO_MSGIN_03 is disabled at
+ * reselection.
+ */
+ if (sacklen != s_sacklen) {
+ data->cur_lunt->msgin03 = FALSE;
+ } else {
+ data->cur_lunt->msgin03 = TRUE;
+ }
+
+ nsp32_adjust_busfree(SCpnt, s_sacklen);
+ }
+ }
+
+ /* This value has not substitude with valid value yet... */
+ //data->cur_lunt->save_datp = data->cur_datp;
+ } else {
+ /*
+ * no processing.
+ */
+ }
+
+ if (execph & MSGIN_03_VALID) {
+ /* MsgIn03 was valid to be processed. No need processing. */
+ }
+
+ /*
+ * target SDTR check
+ */
+ if (data->cur_target->sync_flag & SDTR_INITIATOR) {
+ /*
+ * SDTR negotiation pulled by the initiator has not
+ * finished yet. Fall back to ASYNC mode.
+ */
+ nsp32_set_async(data, data->cur_target);
+ data->cur_target->sync_flag &= ~SDTR_INITIATOR;
+ data->cur_target->sync_flag |= SDTR_DONE;
+ } else if (data->cur_target->sync_flag & SDTR_TARGET) {
+ /*
+ * SDTR negotiation pulled by the target has been
+ * negotiating.
+ */
+ if (execph & (MSGIN_00_VALID | MSGIN_04_VALID)) {
+ /*
+ * If valid message is received, then
+ * negotiation is succeeded.
+ */
+ } else {
+ /*
+ * On the contrary, if unexpected bus free is
+ * occurred, then negotiation is failed. Fall
+ * back to ASYNC mode.
+ */
+ nsp32_set_async(data, data->cur_target);
+ }
+ data->cur_target->sync_flag &= ~SDTR_TARGET;
+ data->cur_target->sync_flag |= SDTR_DONE;
+ }
+
+ /*
+ * It is always ensured by SCSI standard that initiator
+ * switches into Bus Free Phase after
+ * receiving message 00 (Command Complete), 04 (Disconnect).
+ * It's the reason that processing here is valid.
+ */
+ if (execph & MSGIN_00_VALID) {
+ /* MsgIn 00: Command Complete */
+ nsp32_dbg(NSP32_DEBUG_BUSFREE, "command complete");
+
+ SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN);
+ SCpnt->SCp.Message = 0;
+ nsp32_dbg(NSP32_DEBUG_BUSFREE,
+ "normal end stat=0x%x resid=0x%x\n",
+ SCpnt->SCp.Status, SCpnt->resid);
+ SCpnt->result = (DID_OK << 16) |
+ (SCpnt->SCp.Message << 8) |
+ (SCpnt->SCp.Status << 0);
+ nsp32_scsi_done(SCpnt);
+ /* All operation is done */
+ return TRUE;
+ } else if (execph & MSGIN_04_VALID) {
+ /* MsgIn 04: Disconnect */
+ SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN);
+ SCpnt->SCp.Message = 4;
+
+ nsp32_dbg(NSP32_DEBUG_BUSFREE, "disconnect");
+ return TRUE;
+ } else {
+ /* Unexpected bus free */
+ nsp32_msg(KERN_WARNING, "unexpected bus free occurred");
+
+ /* DID_ERROR? */
+ //SCpnt->result = (DID_OK << 16) | (SCpnt->SCp.Message << 8) | (SCpnt->SCp.Status << 0);
+ SCpnt->result = DID_ERROR << 16;
+ nsp32_scsi_done(SCpnt);
+ return TRUE;
+ }
+ return FALSE;
+}
+
+
+/*
+ * nsp32_adjust_busfree - adjusting SG table
+ *
+ * Note: This driver adjust the SG table using SCSI ACK
+ * counter instead of BMCNT counter!
+ */
+static void nsp32_adjust_busfree(struct scsi_cmnd *SCpnt, unsigned int s_sacklen)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ int old_entry = data->cur_entry;
+ int new_entry;
+ int sg_num = data->cur_lunt->sg_num;
+ nsp32_sgtable *sgt = data->cur_lunt->sglun->sgt;
+ unsigned int restlen, sentlen;
+ u32_le len, addr;
+
+ nsp32_dbg(NSP32_DEBUG_SGLIST, "old resid=0x%x", SCpnt->resid);
+
+ /* adjust saved SACK count with 4 byte start address boundary */
+ s_sacklen -= le32_to_cpu(sgt[old_entry].addr) & 3;
+
+ /*
+ * calculate new_entry from sack count and each sgt[].len
+ * calculate the byte which is intent to send
+ */
+ sentlen = 0;
+ for (new_entry = old_entry; new_entry < sg_num; new_entry++) {
+ sentlen += (le32_to_cpu(sgt[new_entry].len) & ~SGTEND);
+ if (sentlen > s_sacklen) {
+ break;
+ }
+ }
+
+ /* all sgt is processed */
+ if (new_entry == sg_num) {
+ goto last;
+ }
+
+ if (sentlen == s_sacklen) {
+ /* XXX: confirm it's ok or not */
+ /* In this case, it's ok because we are at
+ the head element of the sg. restlen is correctly calculated. */
+ }
+
+ /* calculate the rest length for transfering */
+ restlen = sentlen - s_sacklen;
+
+ /* update adjusting current SG table entry */
+ len = le32_to_cpu(sgt[new_entry].len);
+ addr = le32_to_cpu(sgt[new_entry].addr);
+ addr += (len - restlen);
+ sgt[new_entry].addr = cpu_to_le32(addr);
+ sgt[new_entry].len = cpu_to_le32(restlen);
+
+ /* set cur_entry with new_entry */
+ data->cur_entry = new_entry;
+
+ return;
+
+ last:
+ if (SCpnt->resid < sentlen) {
+ nsp32_msg(KERN_ERR, "resid underflow");
+ }
+
+ SCpnt->resid -= sentlen;
+ nsp32_dbg(NSP32_DEBUG_SGLIST, "new resid=0x%x", SCpnt->resid);
+
+ /* update hostdata and lun */
+
+ return;
+}
+
+
+/*
+ * It's called MsgOut phase occur.
+ * NinjaSCSI-32Bi/UDE automatically processes up to 3 messages in
+ * message out phase. It, however, has more than 3 messages,
+ * HBA creates the interrupt and we have to process by hand.
+ */
+static void nsp32_msgout_occur(struct scsi_cmnd *SCpnt)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ unsigned int base = SCpnt->device->host->io_port;
+ //unsigned short command;
+ long new_sgtp;
+ int i;
+
+ nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR,
+ "enter: msgout_len: 0x%x", data->msgout_len);
+
+ /*
+ * If MsgOut phase is occurred without having any
+ * message, then No_Operation is sent (SCSI-2).
+ */
+ if (data->msgout_len == 0) {
+ nsp32_build_nop(SCpnt);
+ }
+
+ /*
+ * Set SGTP ADDR current entry for restarting AUTOSCSI,
+ * because SGTP is incremented next point.
+ * There is few statement in the specification...
+ */
+ new_sgtp = data->cur_lunt->sglun_paddr +
+ (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable));
+
+ /*
+ * send messages
+ */
+ for (i = 0; i < data->msgout_len; i++) {
+ nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR,
+ "%d : 0x%x", i, data->msgoutbuf[i]);
+
+ /*
+ * Check REQ is asserted.
+ */
+ nsp32_wait_req(data, ASSERT);
+
+ if (i == (data->msgout_len - 1)) {
+ /*
+ * If the last message, set the AutoSCSI restart
+ * before send back the ack message. AutoSCSI
+ * restart automatically negate ATN signal.
+ */
+ //command = (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02);
+ //nsp32_restart_autoscsi(SCpnt, command);
+ nsp32_write2(base, COMMAND_CONTROL,
+ (CLEAR_CDB_FIFO_POINTER |
+ AUTO_COMMAND_PHASE |
+ AUTOSCSI_RESTART |
+ AUTO_MSGIN_00_OR_04 |
+ AUTO_MSGIN_02 ));
+ }
+ /*
+ * Write data with SACK, then wait sack is
+ * automatically negated.
+ */
+ nsp32_write1(base, SCSI_DATA_WITH_ACK, data->msgoutbuf[i]);
+ nsp32_wait_sack(data, NEGATE);
+
+ nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "bus: 0x%x\n",
+ nsp32_read1(base, SCSI_BUS_MONITOR));
+ };
+
+ data->msgout_len = 0;
+
+ nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "exit");
+}
+
+/*
+ * Restart AutoSCSI
+ *
+ * Note: Restarting AutoSCSI needs set:
+ * SYNC_REG, ACK_WIDTH, SGT_ADR, TRANSFER_CONTROL
+ */
+static void nsp32_restart_autoscsi(struct scsi_cmnd *SCpnt, unsigned short command)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ unsigned int base = data->BaseAddress;
+ unsigned short transfer = 0;
+
+ nsp32_dbg(NSP32_DEBUG_RESTART, "enter");
+
+ if (data->cur_target == NULL || data->cur_lunt == NULL) {
+ nsp32_msg(KERN_ERR, "Target or Lun is invalid");
+ }
+
+ /*
+ * set SYNC_REG
+ * Don't set BM_START_ADR before setting this register.
+ */
+ nsp32_write1(base, SYNC_REG, data->cur_target->syncreg);
+
+ /*
+ * set ACKWIDTH
+ */
+ nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth);
+
+ /*
+ * set SREQ hazard killer sampling rate
+ */
+ nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg);
+
+ /*
+ * set SGT ADDR (physical address)
+ */
+ nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr);
+
+ /*
+ * set TRANSFER CONTROL REG
+ */
+ transfer = 0;
+ transfer |= (TRANSFER_GO | ALL_COUNTER_CLR);
+ if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
+ if (SCpnt->request_bufflen > 0) {
+ transfer |= BM_START;
+ }
+ } else if (data->trans_method & NSP32_TRANSFER_MMIO) {
+ transfer |= CB_MMIO_MODE;
+ } else if (data->trans_method & NSP32_TRANSFER_PIO) {
+ transfer |= CB_IO_MODE;
+ }
+ nsp32_write2(base, TRANSFER_CONTROL, transfer);
+
+ /*
+ * restart AutoSCSI
+ *
+ * TODO: COMMANDCONTROL_AUTO_COMMAND_PHASE is needed ?
+ */
+ command |= (CLEAR_CDB_FIFO_POINTER |
+ AUTO_COMMAND_PHASE |
+ AUTOSCSI_RESTART );
+ nsp32_write2(base, COMMAND_CONTROL, command);
+
+ nsp32_dbg(NSP32_DEBUG_RESTART, "exit");
+}
+
+
+/*
+ * cannot run automatically message in occur
+ */
+static void nsp32_msgin_occur(struct scsi_cmnd *SCpnt,
+ unsigned long irq_status,
+ unsigned short execph)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ unsigned int base = SCpnt->device->host->io_port;
+ unsigned char msg;
+ unsigned char msgtype;
+ unsigned char newlun;
+ unsigned short command = 0;
+ int msgclear = TRUE;
+ long new_sgtp;
+ int ret;
+
+ /*
+ * read first message
+ * Use SCSIDATA_W_ACK instead of SCSIDATAIN, because the procedure
+ * of Message-In have to be processed before sending back SCSI ACK.
+ */
+ msg = nsp32_read1(base, SCSI_DATA_IN);
+ data->msginbuf[(unsigned char)data->msgin_len] = msg;
+ msgtype = data->msginbuf[0];
+ nsp32_dbg(NSP32_DEBUG_MSGINOCCUR,
+ "enter: msglen: 0x%x msgin: 0x%x msgtype: 0x%x",
+ data->msgin_len, msg, msgtype);
+
+ /*
+ * TODO: We need checking whether bus phase is message in?
+ */
+
+ /*
+ * assert SCSI ACK
+ */
+ nsp32_sack_assert(data);
+
+ /*
+ * processing IDENTIFY
+ */
+ if (msgtype & 0x80) {
+ if (!(irq_status & IRQSTATUS_RESELECT_OCCUER)) {
+ /* Invalid (non reselect) phase */
+ goto reject;
+ }
+
+ newlun = msgtype & 0x1f; /* TODO: SPI-3 compliant? */
+ ret = nsp32_reselection(SCpnt, newlun);
+ if (ret == TRUE) {
+ goto restart;
+ } else {
+ goto reject;
+ }
+ }
+
+ /*
+ * processing messages except for IDENTIFY
+ *
+ * TODO: Messages are all SCSI-2 terminology. SCSI-3 compliance is TODO.
+ */
+ switch (msgtype) {
+ /*
+ * 1-byte message
+ */
+ case COMMAND_COMPLETE:
+ case DISCONNECT:
+ /*
+ * These messages should not be occurred.
+ * They should be processed on AutoSCSI sequencer.
+ */
+ nsp32_msg(KERN_WARNING,
+ "unexpected message of AutoSCSI MsgIn: 0x%x", msg);
+ break;
+
+ case RESTORE_POINTERS:
+ /*
+ * AutoMsgIn03 is disabled, and HBA gets this message.
+ */
+
+ if ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE)) {
+ unsigned int s_sacklen;
+
+ s_sacklen = nsp32_read4(base, SAVED_SACK_CNT);
+ if ((execph & MSGIN_02_VALID) && (s_sacklen > 0)) {
+ nsp32_adjust_busfree(SCpnt, s_sacklen);
+ } else {
+ /* No need to rewrite SGT */
+ }
+ }
+ data->cur_lunt->msgin03 = FALSE;
+
+ /* Update with the new value */
+
+ /* reset SACK/SavedACK counter (or ALL clear?) */
+ nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK);
+
+ /*
+ * set new sg pointer
+ */
+ new_sgtp = data->cur_lunt->sglun_paddr +
+ (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable));
+ nsp32_write4(base, SGT_ADR, new_sgtp);
+
+ break;
+
+ case SAVE_POINTERS:
+ /*
+ * These messages should not be occurred.
+ * They should be processed on AutoSCSI sequencer.
+ */
+ nsp32_msg (KERN_WARNING,
+ "unexpected message of AutoSCSI MsgIn: SAVE_POINTERS");
+
+ break;
+
+ case MESSAGE_REJECT:
+ /* If previous message_out is sending SDTR, and get
+ message_reject from target, SDTR negotiation is failed */
+ if (data->cur_target->sync_flag &
+ (SDTR_INITIATOR | SDTR_TARGET)) {
+ /*
+ * Current target is negotiating SDTR, but it's
+ * failed. Fall back to async transfer mode, and set
+ * SDTR_DONE.
+ */
+ nsp32_set_async(data, data->cur_target);
+ data->cur_target->sync_flag &= ~SDTR_INITIATOR;
+ data->cur_target->sync_flag |= SDTR_DONE;
+
+ }
+ break;
+
+ case LINKED_CMD_COMPLETE:
+ case LINKED_FLG_CMD_COMPLETE:
+ /* queue tag is not supported currently */
+ nsp32_msg (KERN_WARNING,
+ "unsupported message: 0x%x", msgtype);
+ break;
+
+ case INITIATE_RECOVERY:
+ /* staring ECA (Extended Contingent Allegiance) state. */
+ /* This message is declined in SPI2 or later. */
+
+ goto reject;
+
+ /*
+ * 2-byte message
+ */
+ case SIMPLE_QUEUE_TAG:
+ case 0x23:
+ /*
+ * 0x23: Ignore_Wide_Residue is not declared in scsi.h.
+ * No support is needed.
+ */
+ if (data->msgin_len >= 1) {
+ goto reject;
+ }
+
+ /* current position is 1-byte of 2 byte */
+ msgclear = FALSE;
+
+ break;
+
+ /*
+ * extended message
+ */
+ case EXTENDED_MESSAGE:
+ if (data->msgin_len < 1) {
+ /*
+ * Current position does not reach 2-byte
+ * (2-byte is extended message length).
+ */
+ msgclear = FALSE;
+ break;
+ }
+
+ if ((data->msginbuf[1] + 1) > data->msgin_len) {
+ /*
+ * Current extended message has msginbuf[1] + 2
+ * (msgin_len starts counting from 0, so buf[1] + 1).
+ * If current message position is not finished,
+ * continue receiving message.
+ */
+ msgclear = FALSE;
+ break;
+ }
+
+ /*
+ * Reach here means regular length of each type of
+ * extended messages.
+ */
+ switch (data->msginbuf[2]) {
+ case EXTENDED_MODIFY_DATA_POINTER:
+ /* TODO */
+ goto reject; /* not implemented yet */
+ break;
+
+ case EXTENDED_SDTR:
+ /*
+ * Exchange this message between initiator and target.
+ */
+ if (data->msgin_len != EXTENDED_SDTR_LEN + 1) {
+ /*
+ * received inappropriate message.
+ */
+ goto reject;
+ break;
+ }
+
+ nsp32_analyze_sdtr(SCpnt);
+
+ break;
+
+ case EXTENDED_EXTENDED_IDENTIFY:
+ /* SCSI-I only, not supported. */
+ goto reject; /* not implemented yet */
+
+ break;
+
+ case EXTENDED_WDTR:
+ goto reject; /* not implemented yet */
+
+ break;
+
+ default:
+ goto reject;
+ }
+ break;
+
+ default:
+ goto reject;
+ }
+
+ restart:
+ if (msgclear == TRUE) {
+ data->msgin_len = 0;
+
+ /*
+ * If restarting AutoSCSI, but there are some message to out
+ * (msgout_len > 0), set AutoATN, and set SCSIMSGOUT as 0
+ * (MV_VALID = 0). When commandcontrol is written with
+ * AutoSCSI restart, at the same time MsgOutOccur should be
+ * happened (however, such situation is really possible...?).
+ */
+ if (data->msgout_len > 0) {
+ nsp32_write4(base, SCSI_MSG_OUT, 0);
+ command |= AUTO_ATN;
+ }
+
+ /*
+ * restart AutoSCSI
+ * If it's failed, COMMANDCONTROL_AUTO_COMMAND_PHASE is needed.
+ */
+ command |= (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02);
+
+ /*
+ * If current msgin03 is TRUE, then flag on.
+ */
+ if (data->cur_lunt->msgin03 == TRUE) {
+ command |= AUTO_MSGIN_03;
+ }
+ data->cur_lunt->msgin03 = FALSE;
+ } else {
+ data->msgin_len++;
+ }
+
+ /*
+ * restart AutoSCSI
+ */
+ nsp32_restart_autoscsi(SCpnt, command);
+
+ /*
+ * wait SCSI REQ negate for REQ-ACK handshake
+ */
+ nsp32_wait_req(data, NEGATE);
+
+ /*
+ * negate SCSI ACK
+ */
+ nsp32_sack_negate(data);
+
+ nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit");
+
+ return;
+
+ reject:
+ nsp32_msg(KERN_WARNING,
+ "invalid or unsupported MessageIn, rejected. "
+ "current msg: 0x%x (len: 0x%x), processing msg: 0x%x",
+ msg, data->msgin_len, msgtype);
+ nsp32_build_reject(SCpnt);
+ data->msgin_len = 0;
+
+ goto restart;
+}
+
+/*
+ *
+ */
+static void nsp32_analyze_sdtr(struct scsi_cmnd *SCpnt)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ nsp32_target *target = data->cur_target;
+ nsp32_sync_table *synct;
+ unsigned char get_period = data->msginbuf[3];
+ unsigned char get_offset = data->msginbuf[4];
+ int entry;
+ int syncnum;
+
+ nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "enter");
+
+ synct = data->synct;
+ syncnum = data->syncnum;
+
+ /*
+ * If this inititor sent the SDTR message, then target responds SDTR,
+ * initiator SYNCREG, ACKWIDTH from SDTR parameter.
+ * Messages are not appropriate, then send back reject message.
+ * If initiator did not send the SDTR, but target sends SDTR,
+ * initiator calculator the appropriate parameter and send back SDTR.
+ */
+ if (target->sync_flag & SDTR_INITIATOR) {
+ /*
+ * Initiator sent SDTR, the target responds and
+ * send back negotiation SDTR.
+ */
+ nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target responds SDTR");
+
+ target->sync_flag &= ~SDTR_INITIATOR;
+ target->sync_flag |= SDTR_DONE;
+
+ /*
+ * offset:
+ */
+ if (get_offset > SYNC_OFFSET) {
+ /*
+ * Negotiation is failed, the target send back
+ * unexpected offset value.
+ */
+ goto reject;
+ }
+
+ if (get_offset == ASYNC_OFFSET) {
+ /*
+ * Negotiation is succeeded, the target want
+ * to fall back into asynchronous transfer mode.
+ */
+ goto async;
+ }
+
+ /*
+ * period:
+ * Check whether sync period is too short. If too short,
+ * fall back to async mode. If it's ok, then investigate
+ * the received sync period. If sync period is acceptable
+ * between sync table start_period and end_period, then
+ * set this I_T nexus as sent offset and period.
+ * If it's not acceptable, send back reject and fall back
+ * to async mode.
+ */
+ if (get_period < data->synct[0].period_num) {
+ /*
+ * Negotiation is failed, the target send back
+ * unexpected period value.
+ */
+ goto reject;
+ }
+
+ entry = nsp32_search_period_entry(data, target, get_period);
+
+ if (entry < 0) {
+ /*
+ * Target want to use long period which is not
+ * acceptable NinjaSCSI-32Bi/UDE.
+ */
+ goto reject;
+ }
+
+ /*
+ * Set new sync table and offset in this I_T nexus.
+ */
+ nsp32_set_sync_entry(data, target, entry, get_offset);
+ } else {
+ /* Target send SDTR to initiator. */
+ nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target send SDTR");
+
+ target->sync_flag |= SDTR_INITIATOR;
+
+ /* offset: */
+ if (get_offset > SYNC_OFFSET) {
+ /* send back as SYNC_OFFSET */
+ get_offset = SYNC_OFFSET;
+ }
+
+ /* period: */
+ if (get_period < data->synct[0].period_num) {
+ get_period = data->synct[0].period_num;
+ }
+
+ entry = nsp32_search_period_entry(data, target, get_period);
+
+ if (get_offset == ASYNC_OFFSET || entry < 0) {
+ nsp32_set_async(data, target);
+ nsp32_build_sdtr(SCpnt, 0, ASYNC_OFFSET);
+ } else {
+ nsp32_set_sync_entry(data, target, entry, get_offset);
+ nsp32_build_sdtr(SCpnt, get_period, get_offset);
+ }
+ }
+
+ target->period = get_period;
+ nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit");
+ return;
+
+ reject:
+ /*
+ * If the current message is unacceptable, send back to the target
+ * with reject message.
+ */
+ nsp32_build_reject(SCpnt);
+
+ async:
+ nsp32_set_async(data, target); /* set as ASYNC transfer mode */
+
+ target->period = 0;
+ nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit: set async");
+ return;
+}
+
+
+/*
+ * Search config entry number matched in sync_table from given
+ * target and speed period value. If failed to search, return negative value.
+ */
+static int nsp32_search_period_entry(nsp32_hw_data *data,
+ nsp32_target *target,
+ unsigned char period)
+{
+ int i;
+
+ if (target->limit_entry >= data->syncnum) {
+ nsp32_msg(KERN_ERR, "limit_entry exceeds syncnum!");
+ target->limit_entry = 0;
+ }
+
+ for (i = target->limit_entry; i < data->syncnum; i++) {
+ if (period >= data->synct[i].start_period &&
+ period <= data->synct[i].end_period) {
+ break;
+ }
+ }
+
+ /*
+ * Check given period value is over the sync_table value.
+ * If so, return max value.
+ */
+ if (i == data->syncnum) {
+ i = -1;
+ }
+
+ return i;
+}
+
+
+/*
+ * target <-> initiator use ASYNC transfer
+ */
+static void nsp32_set_async(nsp32_hw_data *data, nsp32_target *target)
+{
+ unsigned char period = data->synct[target->limit_entry].period_num;
+
+ target->offset = ASYNC_OFFSET;
+ target->period = 0;
+ target->syncreg = TO_SYNCREG(period, ASYNC_OFFSET);
+ target->ackwidth = 0;
+ target->sample_reg = 0;
+
+ nsp32_dbg(NSP32_DEBUG_SYNC, "set async");
+}
+
+
+/*
+ * target <-> initiator use maximum SYNC transfer
+ */
+static void nsp32_set_max_sync(nsp32_hw_data *data,
+ nsp32_target *target,
+ unsigned char *period,
+ unsigned char *offset)
+{
+ unsigned char period_num, ackwidth;
+
+ period_num = data->synct[target->limit_entry].period_num;
+ *period = data->synct[target->limit_entry].start_period;
+ ackwidth = data->synct[target->limit_entry].ackwidth;
+ *offset = SYNC_OFFSET;
+
+ target->syncreg = TO_SYNCREG(period_num, *offset);
+ target->ackwidth = ackwidth;
+ target->offset = *offset;
+ target->sample_reg = 0; /* disable SREQ sampling */
+}
+
+
+/*
+ * target <-> initiator use entry number speed
+ */
+static void nsp32_set_sync_entry(nsp32_hw_data *data,
+ nsp32_target *target,
+ int entry,
+ unsigned char offset)
+{
+ unsigned char period, ackwidth, sample_rate;
+
+ period = data->synct[entry].period_num;
+ ackwidth = data->synct[entry].ackwidth;
+ offset = offset;
+ sample_rate = data->synct[entry].sample_rate;
+
+ target->syncreg = TO_SYNCREG(period, offset);
+ target->ackwidth = ackwidth;
+ target->offset = offset;
+ target->sample_reg = sample_rate | SAMPLING_ENABLE;
+
+ nsp32_dbg(NSP32_DEBUG_SYNC, "set sync");
+}
+
+
+/*
+ * It waits until SCSI REQ becomes assertion or negation state.
+ *
+ * Note: If nsp32_msgin_occur is called, we asserts SCSI ACK. Then
+ * connected target responds SCSI REQ negation. We have to wait
+ * SCSI REQ becomes negation in order to negate SCSI ACK signal for
+ * REQ-ACK handshake.
+ */
+static void nsp32_wait_req(nsp32_hw_data *data, int state)
+{
+ unsigned int base = data->BaseAddress;
+ int wait_time = 0;
+ unsigned char bus, req_bit;
+
+ if (!((state == ASSERT) || (state == NEGATE))) {
+ nsp32_msg(KERN_ERR, "unknown state designation");
+ }
+ /* REQ is BIT(5) */
+ req_bit = (state == ASSERT ? BUSMON_REQ : 0);
+
+ do {
+ bus = nsp32_read1(base, SCSI_BUS_MONITOR);
+ if ((bus & BUSMON_REQ) == req_bit) {
+ nsp32_dbg(NSP32_DEBUG_WAIT,
+ "wait_time: %d", wait_time);
+ return;
+ }
+ udelay(1);
+ wait_time++;
+ } while (wait_time < REQSACK_TIMEOUT_TIME);
+
+ nsp32_msg(KERN_WARNING, "wait REQ timeout, req_bit: 0x%x", req_bit);
+}
+
+/*
+ * It waits until SCSI SACK becomes assertion or negation state.
+ */
+static void nsp32_wait_sack(nsp32_hw_data *data, int state)
+{
+ unsigned int base = data->BaseAddress;
+ int wait_time = 0;
+ unsigned char bus, ack_bit;
+
+ if (!((state == ASSERT) || (state == NEGATE))) {
+ nsp32_msg(KERN_ERR, "unknown state designation");
+ }
+ /* ACK is BIT(4) */
+ ack_bit = (state == ASSERT ? BUSMON_ACK : 0);
+
+ do {
+ bus = nsp32_read1(base, SCSI_BUS_MONITOR);
+ if ((bus & BUSMON_ACK) == ack_bit) {
+ nsp32_dbg(NSP32_DEBUG_WAIT,
+ "wait_time: %d", wait_time);
+ return;
+ }
+ udelay(1);
+ wait_time++;
+ } while (wait_time < REQSACK_TIMEOUT_TIME);
+
+ nsp32_msg(KERN_WARNING, "wait SACK timeout, ack_bit: 0x%x", ack_bit);
+}
+
+/*
+ * assert SCSI ACK
+ *
+ * Note: SCSI ACK assertion needs with ACKENB=1, AUTODIRECTION=1.
+ */
+static void nsp32_sack_assert(nsp32_hw_data *data)
+{
+ unsigned int base = data->BaseAddress;
+ unsigned char busctrl;
+
+ busctrl = nsp32_read1(base, SCSI_BUS_CONTROL);
+ busctrl |= (BUSCTL_ACK | AUTODIRECTION | ACKENB);
+ nsp32_write1(base, SCSI_BUS_CONTROL, busctrl);
+}
+
+/*
+ * negate SCSI ACK
+ */
+static void nsp32_sack_negate(nsp32_hw_data *data)
+{
+ unsigned int base = data->BaseAddress;
+ unsigned char busctrl;
+
+ busctrl = nsp32_read1(base, SCSI_BUS_CONTROL);
+ busctrl &= ~BUSCTL_ACK;
+ nsp32_write1(base, SCSI_BUS_CONTROL, busctrl);
+}
+
+
+
+/*
+ * Note: n_io_port is defined as 0x7f because I/O register port is
+ * assigned as:
+ * 0x800-0x8ff: memory mapped I/O port
+ * 0x900-0xbff: (map same 0x800-0x8ff I/O port image repeatedly)
+ * 0xc00-0xfff: CardBus status registers
+ */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
+#define DETECT_OK 0
+#define DETECT_NG 1
+#define PCIDEV pdev
+static int nsp32_detect(struct pci_dev *pdev)
+#else
+#define DETECT_OK 1
+#define DETECT_NG 0
+#define PCIDEV (data->Pci)
+static int nsp32_detect(Scsi_Host_Template *sht)
+#endif
+{
+ struct Scsi_Host *host; /* registered host structure */
+ struct resource *res;
+ nsp32_hw_data *data;
+ int ret;
+ int i, j;
+
+ nsp32_dbg(NSP32_DEBUG_REGISTER, "enter");
+
+ /*
+ * register this HBA as SCSI device
+ */
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
+ host = scsi_host_alloc(&nsp32_template, sizeof(nsp32_hw_data));
+#else
+ host = scsi_register(sht, sizeof(nsp32_hw_data));
+#endif
+ if (host == NULL) {
+ nsp32_msg (KERN_ERR, "failed to scsi register");
+ goto err;
+ }
+
+ /*
+ * set nsp32_hw_data
+ */
+ data = (nsp32_hw_data *)host->hostdata;
+
+ memcpy(data, &nsp32_data_base, sizeof(nsp32_hw_data));
+
+ host->irq = data->IrqNumber;
+ host->io_port = data->BaseAddress;
+ host->unique_id = data->BaseAddress;
+ host->n_io_port = data->NumAddress;
+ host->base = (unsigned long)data->MmioAddress;
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,63))
+ scsi_set_device(host, &PCIDEV->dev);
+#else
+ scsi_set_pci_device(host, PCIDEV);
+#endif
+
+ data->Host = host;
+ spin_lock_init(&(data->Lock));
+
+ data->cur_lunt = NULL;
+ data->cur_target = NULL;
+
+ /*
+ * Bus master transfer mode is supported currently.
+ */
+ data->trans_method = NSP32_TRANSFER_BUSMASTER;
+
+ /*
+ * Set clock div, CLOCK_4 (HBA has own external clock, and
+ * dividing * 100ns/4).
+ * Currently CLOCK_4 has only tested, not for CLOCK_2/PCICLK yet.
+ */
+ data->clock = CLOCK_4;
+
+ /*
+ * Select appropriate nsp32_sync_table and set I_CLOCKDIV.
+ */
+ switch (data->clock) {
+ case CLOCK_4:
+ /* If data->clock is CLOCK_4, then select 40M sync table. */
+ data->synct = nsp32_sync_table_40M;
+ data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M);
+ break;
+ case CLOCK_2:
+ /* If data->clock is CLOCK_2, then select 20M sync table. */
+ data->synct = nsp32_sync_table_20M;
+ data->syncnum = ARRAY_SIZE(nsp32_sync_table_20M);
+ break;
+ case PCICLK:
+ /* If data->clock is PCICLK, then select pci sync table. */
+ data->synct = nsp32_sync_table_pci;
+ data->syncnum = ARRAY_SIZE(nsp32_sync_table_pci);
+ break;
+ default:
+ nsp32_msg(KERN_WARNING,
+ "Invalid clock div is selected, set CLOCK_4.");
+ /* Use default value CLOCK_4 */
+ data->clock = CLOCK_4;
+ data->synct = nsp32_sync_table_40M;
+ data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M);
+ }
+
+ /*
+ * setup nsp32_lunt
+ */
+
+ /*
+ * setup DMA
+ */
+ if (pci_set_dma_mask(PCIDEV, 0xffffffffUL) != 0) {
+ nsp32_msg (KERN_ERR, "failed to set PCI DMA mask");
+ goto scsi_unregister;
+ }
+
+ /*
+ * allocate autoparam DMA resource.
+ */
+ data->autoparam = pci_alloc_consistent(PCIDEV, sizeof(nsp32_autoparam), &(data->auto_paddr));
+ if (data->autoparam == NULL) {
+ nsp32_msg(KERN_ERR, "failed to allocate DMA memory");
+ goto scsi_unregister;
+ }
+
+ /*
+ * allocate scatter-gather DMA resource.
+ */
+ data->sg_list = pci_alloc_consistent(PCIDEV, NSP32_SG_TABLE_SIZE,
+ &(data->sg_paddr));
+ if (data->sg_list == NULL) {
+ nsp32_msg(KERN_ERR, "failed to allocate DMA memory");
+ goto free_autoparam;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(data->lunt); i++) {
+ for (j = 0; j < ARRAY_SIZE(data->lunt[0]); j++) {
+ int offset = i * ARRAY_SIZE(data->lunt[0]) + j;
+ nsp32_lunt tmp = {
+ .SCpnt = NULL,
+ .save_datp = 0,
+ .msgin03 = FALSE,
+ .sg_num = 0,
+ .cur_entry = 0,
+ .sglun = &(data->sg_list[offset]),
+ .sglun_paddr = data->sg_paddr + (offset * sizeof(nsp32_sglun)),
+ };
+
+ data->lunt[i][j] = tmp;
+ }
+ }
+
+ /*
+ * setup target
+ */
+ for (i = 0; i < ARRAY_SIZE(data->target); i++) {
+ nsp32_target *target = &(data->target[i]);
+
+ target->limit_entry = 0;
+ target->sync_flag = 0;
+ nsp32_set_async(data, target);
+ }
+
+ /*
+ * EEPROM check
+ */
+ ret = nsp32_getprom_param(data);
+ if (ret == FALSE) {
+ data->resettime = 3; /* default 3 */
+ }
+
+ /*
+ * setup HBA
+ */
+ nsp32hw_init(data);
+
+ snprintf(data->info_str, sizeof(data->info_str),
+ "NinjaSCSI-32Bi/UDE: irq %d, io 0x%lx+0x%x",
+ host->irq, host->io_port, host->n_io_port);
+
+ /*
+ * SCSI bus reset
+ *
+ * Note: It's important to reset SCSI bus in initialization phase.
+ * NinjaSCSI-32Bi/UDE HBA EEPROM seems to exchange SDTR when
+ * system is coming up, so SCSI devices connected to HBA is set as
+ * un-asynchronous mode. It brings the merit that this HBA is
+ * ready to start synchronous transfer without any preparation,
+ * but we are difficult to control transfer speed. In addition,
+ * it prevents device transfer speed from effecting EEPROM start-up
+ * SDTR. NinjaSCSI-32Bi/UDE has the feature if EEPROM is set as
+ * Auto Mode, then FAST-10M is selected when SCSI devices are
+ * connected same or more than 4 devices. It should be avoided
+ * depending on this specification. Thus, resetting the SCSI bus
+ * restores all connected SCSI devices to asynchronous mode, then
+ * this driver set SDTR safely later, and we can control all SCSI
+ * device transfer mode.
+ */
+ nsp32_do_bus_reset(data);
+
+ ret = request_irq(host->irq, do_nsp32_isr,
+ SA_SHIRQ | SA_SAMPLE_RANDOM, "nsp32", data);
+ if (ret < 0) {
+ nsp32_msg(KERN_ERR, "Unable to allocate IRQ for NinjaSCSI32 "
+ "SCSI PCI controller. Interrupt: %d", host->irq);
+ goto free_sg_list;
+ }
+
+ /*
+ * PCI IO register
+ */
+ res = request_region(host->io_port, host->n_io_port, "nsp32");
+ if (res == NULL) {
+ nsp32_msg(KERN_ERR,
+ "I/O region 0x%lx+0x%lx is already used",
+ data->BaseAddress, data->NumAddress);
+ goto free_irq;
+ }
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
+ scsi_add_host (host, &PCIDEV->dev);
+ scsi_scan_host(host);
+#endif
+ pci_set_drvdata(PCIDEV, host);
+ return DETECT_OK;
+
+ free_irq:
+ free_irq(host->irq, data);
+
+ free_sg_list:
+ pci_free_consistent(PCIDEV, NSP32_SG_TABLE_SIZE,
+ data->sg_list, data->sg_paddr);
+
+ free_autoparam:
+ pci_free_consistent(PCIDEV, sizeof(nsp32_autoparam),
+ data->autoparam, data->auto_paddr);
+
+ scsi_unregister:
+ scsi_host_put(host);
+
+ err:
+ return DETECT_NG;
+}
+#undef DETECT_OK
+#undef DETECT_NG
+#undef PCIDEV
+
+static int nsp32_release(struct Scsi_Host *host)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata;
+
+ if (data->autoparam) {
+ pci_free_consistent(data->Pci, sizeof(nsp32_autoparam),
+ data->autoparam, data->auto_paddr);
+ }
+
+ if (data->sg_list) {
+ pci_free_consistent(data->Pci, NSP32_SG_TABLE_SIZE,
+ data->sg_list, data->sg_paddr);
+ }
+
+ if (host->irq) {
+ free_irq(host->irq, data);
+ }
+
+ if (host->io_port && host->n_io_port) {
+ release_region(host->io_port, host->n_io_port);
+ }
+
+ if (data->MmioAddress) {
+ iounmap(data->MmioAddress);
+ }
+
+ return 0;
+}
+
+static const char *nsp32_info(struct Scsi_Host *shpnt)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)shpnt->hostdata;
+
+ return data->info_str;
+}
+
+
+/****************************************************************************
+ * error handler
+ */
+static int nsp32_eh_abort(struct scsi_cmnd *SCpnt)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ unsigned int base = SCpnt->device->host->io_port;
+
+ nsp32_msg(KERN_WARNING, "abort");
+
+ if (data->cur_lunt->SCpnt == NULL) {
+ nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort failed");
+ return FAILED;
+ }
+
+ if (data->cur_target->sync_flag & (SDTR_INITIATOR | SDTR_TARGET)) {
+ /* reset SDTR negotiation */
+ data->cur_target->sync_flag = 0;
+ nsp32_set_async(data, data->cur_target);
+ }
+
+ nsp32_write2(base, TRANSFER_CONTROL, 0);
+ nsp32_write2(base, BM_CNT, 0);
+
+ SCpnt->result = DID_ABORT << 16;
+ nsp32_scsi_done(SCpnt);
+
+ nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort success");
+ return SUCCESS;
+}
+
+static int nsp32_eh_bus_reset(struct scsi_cmnd *SCpnt)
+{
+ nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
+ unsigned int base = SCpnt->device->host->io_port;
+
+ nsp32_msg(KERN_INFO, "Bus Reset");
+ nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt);
+
+ nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
+ nsp32_do_bus_reset(data);
+ nsp32_write2(base, IRQ_CONTROL, 0);
+
+ return SUCCESS; /* SCSI bus reset is succeeded at any time. */
+}
+
+static void nsp32_do_bus_reset(nsp32_hw_data *data)
+{
+ unsigned int base = data->BaseAddress;
+ unsigned short intrdat;
+ int i;
+
+ nsp32_dbg(NSP32_DEBUG_BUSRESET, "in");
+
+ /*
+ * stop all transfer
+ * clear TRANSFERCONTROL_BM_START
+ * clear counter
+ */
+ nsp32_write2(base, TRANSFER_CONTROL, 0);
+ nsp32_write4(base, BM_CNT, 0);
+ nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK);
+
+ /*
+ * fall back to asynchronous transfer mode
+ * initialize SDTR negotiation flag
+ */
+ for (i = 0; i < ARRAY_SIZE(data->target); i++) {
+ nsp32_target *target = &data->target[i];
+
+ target->sync_flag = 0;
+ nsp32_set_async(data, target);
+ }
+
+ /*
+ * reset SCSI bus
+ */
+ nsp32_write1(base, SCSI_BUS_CONTROL, BUSCTL_RST);
+ udelay(RESET_HOLD_TIME);
+ nsp32_write1(base, SCSI_BUS_CONTROL, 0);
+ for(i = 0; i < 5; i++) {
+ intrdat = nsp32_read2(base, IRQ_STATUS); /* dummy read */
+ nsp32_dbg(NSP32_DEBUG_BUSRESET, "irq:1: 0x%x", intrdat);
+ }
+
+ data->CurrentSC = NULL;
+}
+
+static int nsp32_eh_host_reset(struct scsi_cmnd *SCpnt)
+{
+ struct Scsi_Host *host = SCpnt->device->host;
+ unsigned int base = SCpnt->device->host->io_port;
+ nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata;
+
+ nsp32_msg(KERN_INFO, "Host Reset");
+ nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt);
+
+ nsp32hw_init(data);
+ nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
+ nsp32_do_bus_reset(data);
+ nsp32_write2(base, IRQ_CONTROL, 0);
+
+ return SUCCESS; /* Host reset is succeeded at any time. */
+}
+
+
+/**************************************************************************
+ * EEPROM handler
+ */
+
+/*
+ * getting EEPROM parameter
+ */
+static int nsp32_getprom_param(nsp32_hw_data *data)
+{
+ int vendor = data->pci_devid->vendor;
+ int device = data->pci_devid->device;
+ int ret, val, i;
+
+ /*
+ * EEPROM checking.
+ */
+ ret = nsp32_prom_read(data, 0x7e);
+ if (ret != 0x55) {
+ nsp32_msg(KERN_INFO, "No EEPROM detected: 0x%x", ret);
+ return FALSE;
+ }
+ ret = nsp32_prom_read(data, 0x7f);
+ if (ret != 0xaa) {
+ nsp32_msg(KERN_INFO, "Invalid number: 0x%x", ret);
+ return FALSE;
+ }
+
+ /*
+ * check EEPROM type
+ */
+ if (vendor == PCI_VENDOR_ID_WORKBIT &&
+ device == PCI_DEVICE_ID_WORKBIT_STANDARD) {
+ ret = nsp32_getprom_c16(data);
+ } else if (vendor == PCI_VENDOR_ID_WORKBIT &&
+ device == PCI_DEVICE_ID_NINJASCSI_32BIB_LOGITEC) {
+ ret = nsp32_getprom_at24(data);
+ } else if (vendor == PCI_VENDOR_ID_WORKBIT &&
+ device == PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO ) {
+ ret = nsp32_getprom_at24(data);
+ } else {
+ nsp32_msg(KERN_WARNING, "Unknown EEPROM");
+ ret = FALSE;
+ }
+
+ /* for debug : SPROM data full checking */
+ for (i = 0; i <= 0x1f; i++) {
+ val = nsp32_prom_read(data, i);
+ nsp32_dbg(NSP32_DEBUG_EEPROM,
+ "rom address 0x%x : 0x%x", i, val);
+ }
+
+ return ret;
+}
+
+
+/*
+ * AT24C01A (Logitec: LHA-600S), AT24C02 (Melco Buffalo: IFC-USLP) data map:
+ *
+ * ROMADDR
+ * 0x00 - 0x06 : Device Synchronous Transfer Period (SCSI ID 0 - 6)
+ * Value 0x0: ASYNC, 0x0c: Ultra-20M, 0x19: Fast-10M
+ * 0x07 : HBA Synchronous Transfer Period
+ * Value 0: AutoSync, 1: Manual Setting
+ * 0x08 - 0x0f : Not Used? (0x0)
+ * 0x10 : Bus Termination
+ * Value 0: Auto[ON], 1: ON, 2: OFF
+ * 0x11 : Not Used? (0)
+ * 0x12 : Bus Reset Delay Time (0x03)
+ * 0x13 : Bootable CD Support
+ * Value 0: Disable, 1: Enable
+ * 0x14 : Device Scan
+ * Bit 7 6 5 4 3 2 1 0
+ * | <----------------->
+ * | SCSI ID: Value 0: Skip, 1: YES
+ * |-> Value 0: ALL scan, Value 1: Manual
+ * 0x15 - 0x1b : Not Used? (0)
+ * 0x1c : Constant? (0x01) (clock div?)
+ * 0x1d - 0x7c : Not Used (0xff)
+ * 0x7d : Not Used? (0xff)
+ * 0x7e : Constant (0x55), Validity signature
+ * 0x7f : Constant (0xaa), Validity signature
+ */
+static int nsp32_getprom_at24(nsp32_hw_data *data)
+{
+ int ret, i;
+ int auto_sync;
+ nsp32_target *target;
+ int entry;
+
+ /*
+ * Reset time which is designated by EEPROM.
+ *
+ * TODO: Not used yet.
+ */
+ data->resettime = nsp32_prom_read(data, 0x12);
+
+ /*
+ * HBA Synchronous Transfer Period
+ *
+ * Note: auto_sync = 0: auto, 1: manual. Ninja SCSI HBA spec says
+ * that if auto_sync is 0 (auto), and connected SCSI devices are
+ * same or lower than 3, then transfer speed is set as ULTRA-20M.
+ * On the contrary if connected SCSI devices are same or higher
+ * than 4, then transfer speed is set as FAST-10M.
+ *
+ * I break this rule. The number of connected SCSI devices are
+ * only ignored. If auto_sync is 0 (auto), then transfer speed is
+ * forced as ULTRA-20M.
+ */
+ ret = nsp32_prom_read(data, 0x07);
+ switch (ret) {
+ case 0:
+ auto_sync = TRUE;
+ break;
+ case 1:
+ auto_sync = FALSE;
+ break;
+ default:
+ nsp32_msg(KERN_WARNING,
+ "Unsupported Auto Sync mode. Fall back to manual mode.");
+ auto_sync = TRUE;
+ }
+
+ if (trans_mode == ULTRA20M_MODE) {
+ auto_sync = TRUE;
+ }
+
+ /*
+ * each device Synchronous Transfer Period
+ */
+ for (i = 0; i < NSP32_HOST_SCSIID; i++) {
+ target = &data->target[i];
+ if (auto_sync == TRUE) {
+ target->limit_entry = 0; /* set as ULTRA20M */
+ } else {
+ ret = nsp32_prom_read(data, i);
+ entry = nsp32_search_period_entry(data, target, ret);
+ if (entry < 0) {
+ /* search failed... set maximum speed */
+ entry = 0;
+ }
+ target->limit_entry = entry;
+ }
+ }
+
+ return TRUE;
+}
+
+
+/*
+ * C16 110 (I-O Data: SC-NBD) data map:
+ *
+ * ROMADDR
+ * 0x00 - 0x06 : Device Synchronous Transfer Period (SCSI ID 0 - 6)
+ * Value 0x0: 20MB/S, 0x1: 10MB/S, 0x2: 5MB/S, 0x3: ASYNC
+ * 0x07 : 0 (HBA Synchronous Transfer Period: Auto Sync)
+ * 0x08 - 0x0f : Not Used? (0x0)
+ * 0x10 : Transfer Mode
+ * Value 0: PIO, 1: Busmater
+ * 0x11 : Bus Reset Delay Time (0x00-0x20)
+ * 0x12 : Bus Termination
+ * Value 0: Disable, 1: Enable
+ * 0x13 - 0x19 : Disconnection
+ * Value 0: Disable, 1: Enable
+ * 0x1a - 0x7c : Not Used? (0)
+ * 0x7d : Not Used? (0xf8)
+ * 0x7e : Constant (0x55), Validity signature
+ * 0x7f : Constant (0xaa), Validity signature
+ */
+static int nsp32_getprom_c16(nsp32_hw_data *data)
+{
+ int ret, i;
+ nsp32_target *target;
+ int entry, val;
+
+ /*
+ * Reset time which is designated by EEPROM.
+ *
+ * TODO: Not used yet.
+ */
+ data->resettime = nsp32_prom_read(data, 0x11);
+
+ /*
+ * each device Synchronous Transfer Period
+ */
+ for (i = 0; i < NSP32_HOST_SCSIID; i++) {
+ target = &data->target[i];
+ ret = nsp32_prom_read(data, i);
+ switch (ret) {
+ case 0: /* 20MB/s */
+ val = 0x0c;
+ break;
+ case 1: /* 10MB/s */
+ val = 0x19;
+ break;
+ case 2: /* 5MB/s */
+ val = 0x32;
+ break;
+ case 3: /* ASYNC */
+ val = 0x00;
+ break;
+ default: /* default 20MB/s */
+ val = 0x0c;
+ break;
+ }
+ entry = nsp32_search_period_entry(data, target, val);
+ if (entry < 0 || trans_mode == ULTRA20M_MODE) {
+ /* search failed... set maximum speed */
+ entry = 0;
+ }
+ target->limit_entry = entry;
+ }
+
+ return TRUE;
+}
+
+
+/*
+ * Atmel AT24C01A (drived in 5V) serial EEPROM routines
+ */
+static int nsp32_prom_read(nsp32_hw_data *data, int romaddr)
+{
+ int i, val;
+
+ /* start condition */
+ nsp32_prom_start(data);
+
+ /* device address */
+ nsp32_prom_write_bit(data, 1); /* 1 */
+ nsp32_prom_write_bit(data, 0); /* 0 */
+ nsp32_prom_write_bit(data, 1); /* 1 */
+ nsp32_prom_write_bit(data, 0); /* 0 */
+ nsp32_prom_write_bit(data, 0); /* A2: 0 (GND) */
+ nsp32_prom_write_bit(data, 0); /* A1: 0 (GND) */
+ nsp32_prom_write_bit(data, 0); /* A0: 0 (GND) */
+
+ /* R/W: W for dummy write */
+ nsp32_prom_write_bit(data, 0);
+
+ /* ack */
+ nsp32_prom_write_bit(data, 0);
+
+ /* word address */
+ for (i = 7; i >= 0; i--) {
+ nsp32_prom_write_bit(data, ((romaddr >> i) & 1));
+ }
+
+ /* ack */
+ nsp32_prom_write_bit(data, 0);
+
+ /* start condition */
+ nsp32_prom_start(data);
+
+ /* device address */
+ nsp32_prom_write_bit(data, 1); /* 1 */
+ nsp32_prom_write_bit(data, 0); /* 0 */
+ nsp32_prom_write_bit(data, 1); /* 1 */
+ nsp32_prom_write_bit(data, 0); /* 0 */
+ nsp32_prom_write_bit(data, 0); /* A2: 0 (GND) */
+ nsp32_prom_write_bit(data, 0); /* A1: 0 (GND) */
+ nsp32_prom_write_bit(data, 0); /* A0: 0 (GND) */
+
+ /* R/W: R */
+ nsp32_prom_write_bit(data, 1);
+
+ /* ack */
+ nsp32_prom_write_bit(data, 0);
+
+ /* data... */
+ val = 0;
+ for (i = 7; i >= 0; i--) {
+ val += (nsp32_prom_read_bit(data) << i);
+ }
+
+ /* no ack */
+ nsp32_prom_write_bit(data, 1);
+
+ /* stop condition */
+ nsp32_prom_stop(data);
+
+ return val;
+}
+
+static void nsp32_prom_set(nsp32_hw_data *data, int bit, int val)
+{
+ int base = data->BaseAddress;
+ int tmp;
+
+ tmp = nsp32_index_read1(base, SERIAL_ROM_CTL);
+
+ if (val == 0) {
+ tmp &= ~bit;
+ } else {
+ tmp |= bit;
+ }
+
+ nsp32_index_write1(base, SERIAL_ROM_CTL, tmp);
+
+ udelay(10);
+}
+
+static int nsp32_prom_get(nsp32_hw_data *data, int bit)
+{
+ int base = data->BaseAddress;
+ int tmp, ret;
+
+ if (bit != SDA) {
+ nsp32_msg(KERN_ERR, "return value is not appropriate");
+ return 0;
+ }
+
+
+ tmp = nsp32_index_read1(base, SERIAL_ROM_CTL) & bit;
+
+ if (tmp == 0) {
+ ret = 0;
+ } else {
+ ret = 1;
+ }
+
+ udelay(10);
+
+ return ret;
+}
+
+static void nsp32_prom_start (nsp32_hw_data *data)
+{
+ /* start condition */
+ nsp32_prom_set(data, SCL, 1);
+ nsp32_prom_set(data, SDA, 1);
+ nsp32_prom_set(data, ENA, 1); /* output mode */
+ nsp32_prom_set(data, SDA, 0); /* keeping SCL=1 and transiting
+ * SDA 1->0 is start condition */
+ nsp32_prom_set(data, SCL, 0);
+}
+
+static void nsp32_prom_stop (nsp32_hw_data *data)
+{
+ /* stop condition */
+ nsp32_prom_set(data, SCL, 1);
+ nsp32_prom_set(data, SDA, 0);
+ nsp32_prom_set(data, ENA, 1); /* output mode */
+ nsp32_prom_set(data, SDA, 1);
+ nsp32_prom_set(data, SCL, 0);
+}
+
+static void nsp32_prom_write_bit(nsp32_hw_data *data, int val)
+{
+ /* write */
+ nsp32_prom_set(data, SDA, val);
+ nsp32_prom_set(data, SCL, 1 );
+ nsp32_prom_set(data, SCL, 0 );
+}
+
+static int nsp32_prom_read_bit(nsp32_hw_data *data)
+{
+ int val;
+
+ /* read */
+ nsp32_prom_set(data, ENA, 0); /* input mode */
+ nsp32_prom_set(data, SCL, 1);
+
+ val = nsp32_prom_get(data, SDA);
+
+ nsp32_prom_set(data, SCL, 0);
+ nsp32_prom_set(data, ENA, 1); /* output mode */
+
+ return val;
+}
+
+
+/**************************************************************************
+ * Power Management
+ */
+#ifdef CONFIG_PM
+
+/* Device suspended */
+static int nsp32_suspend(struct pci_dev *pdev, u32 state)
+{
+ struct Scsi_Host *host = pci_get_drvdata(pdev);
+
+ nsp32_msg(KERN_INFO, "pci-suspend: pdev=0x%p, state=%ld, slot=%s, host=0x%p", pdev, state, pci_name(pdev), host);
+
+ pci_save_state (pdev);
+ pci_disable_device (pdev);
+ pci_set_power_state(pdev, state);
+
+ return 0;
+}
+
+/* Device woken up */
+static int nsp32_resume(struct pci_dev *pdev)
+{
+ struct Scsi_Host *host = pci_get_drvdata(pdev);
+ nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata;
+ unsigned short reg;
+
+ nsp32_msg(KERN_INFO, "pci-resume: pdev=0x%p, slot=%s, host=0x%p", pdev, pci_name(pdev), host);
+
+ pci_set_power_state(pdev, 0);
+ pci_enable_wake (pdev, 0, 0);
+ pci_restore_state (pdev);
+
+ reg = nsp32_read2(data->BaseAddress, INDEX_REG);
+
+ nsp32_msg(KERN_INFO, "io=0x%x reg=0x%x", data->BaseAddress, reg);
+
+ if (reg == 0xffff) {
+ nsp32_msg(KERN_INFO, "missing device. abort resume.");
+ return 0;
+ }
+
+ nsp32hw_init (data);
+ nsp32_do_bus_reset(data);
+
+ nsp32_msg(KERN_INFO, "resume success");
+
+ return 0;
+}
+
+/* Enable wake event */
+static int nsp32_enable_wake(struct pci_dev *pdev, u32 state, int enable)
+{
+ struct Scsi_Host *host = pci_get_drvdata(pdev);
+
+ nsp32_msg(KERN_INFO, "pci-enable_wake: stub, pdev=0x%p, enable=%d, slot=%s, host=0x%p", pdev, enable, pci_name(pdev), host);
+
+ return 0;
+}
+#endif
+
+/************************************************************************
+ * PCI/Cardbus probe/remove routine
+ */
+static int __devinit nsp32_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ int ret;
+ nsp32_hw_data *data = &nsp32_data_base;
+
+ nsp32_dbg(NSP32_DEBUG_REGISTER, "enter");
+
+ ret = pci_enable_device(pdev);
+ if (ret) {
+ nsp32_msg(KERN_ERR, "failed to enable pci device");
+ return ret;
+ }
+
+ data->Pci = pdev;
+ data->pci_devid = id;
+ data->IrqNumber = pdev->irq;
+ data->BaseAddress = pci_resource_start(pdev, 0);
+ data->NumAddress = pci_resource_len (pdev, 0);
+ data->MmioAddress = ioremap_nocache(pci_resource_start(pdev, 1),
+ pci_resource_len (pdev, 1));
+ data->MmioLength = pci_resource_len (pdev, 1);
+
+ pci_set_master(pdev);
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
+ ret = nsp32_detect(pdev);
+#else
+ ret = scsi_register_host(&nsp32_template);
+#endif
+
+ nsp32_msg(KERN_INFO, "irq: %i mmio: %p+0x%lx slot: %s model: %s",
+ pdev->irq,
+ data->MmioAddress, data->MmioLength,
+ pci_name(pdev),
+ nsp32_model[id->driver_data]);
+
+ nsp32_dbg(NSP32_DEBUG_REGISTER, "exit %d", ret);
+
+ return ret;
+}
+
+static void __devexit nsp32_remove(struct pci_dev *pdev)
+{
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
+ struct Scsi_Host *host = pci_get_drvdata(pdev);
+#endif
+
+ nsp32_dbg(NSP32_DEBUG_REGISTER, "enter");
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
+ scsi_remove_host(host);
+
+ nsp32_release(host);
+
+ scsi_host_put(host);
+#else
+ scsi_unregister_host(&nsp32_template);
+#endif
+}
+
+
+
+static struct pci_driver nsp32_driver = {
+ .name = "nsp32",
+ .id_table = nsp32_pci_table,
+ .probe = nsp32_probe,
+ .remove = __devexit_p(nsp32_remove),
+#ifdef CONFIG_PM
+ .suspend = nsp32_suspend,
+ .resume = nsp32_resume,
+ .enable_wake = nsp32_enable_wake,
+#endif
+};
+
+/*********************************************************************
+ * Moule entry point
+ */
+static int __init init_nsp32(void) {
+ nsp32_msg(KERN_INFO, "loading...");
+ return pci_module_init(&nsp32_driver);
+}
+
+static void __exit exit_nsp32(void) {
+ nsp32_msg(KERN_INFO, "unloading...");
+ pci_unregister_driver(&nsp32_driver);
+}
+
+module_init(init_nsp32);
+module_exit(exit_nsp32);
+
+/* end */
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-21 16:01:44 +0000