/
nsp32.c
3588 lines (3037 loc) · 92.4 KB
/
nsp32.c
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/*
* 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 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 (struct 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_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 = scmd_id(SCpnt);
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 = scmd_id(SCpnt);
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 (scmd_id(SCpnt) == 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;