nsp32.c

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/*
 * NinjaSCSI-32Bi Cardbus, NinjaSCSI-32UDE PCI/CardBus SCSI driver
 * Copyright (C) 2001, 2002, 2003
 *      YOKOTA Hiroshi <[e-mail]>
 *      GOTO Masanori <[e-mail]>, <[e-mail]>
 *
 * 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.h"
#include <scsi/scsi_host.h>
#include <scsi/scsi_ioctl.h>
#include <scsi/scsi.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_PARM     (trans_mode, "i");
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_PARM     (auto_param, "i");
MODULE_PARM_DESC(auto_param, "AutoParameter mode (0: ON(default) 1: OFF)");

static int       disc_priv  = 1;	/* default: OFF */
MODULE_PARM     (disc_priv,  "i");
MODULE_PARM_DESC(disc_priv,  "disconnection privilege mode (0: ON 1: OFF(default))");

MODULE_AUTHOR("YOKOTA Hiroshi <[e-mail]>, GOTO Masanori <[e-mail]>");
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(Scsi_Cmnd *, void (*done)(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     (Scsi_Cmnd *);
static int         nsp32_eh_bus_reset (Scsi_Cmnd *);
static int         nsp32_eh_host_reset(Scsi_Cmnd *);

/* generate SCSI message */
static void nsp32_build_identify(Scsi_Cmnd *);
static void nsp32_build_nop     (Scsi_Cmnd *);
static void nsp32_build_reject  (Scsi_Cmnd *);
static void nsp32_build_sdtr    (Scsi_Cmnd *, unsigned char, unsigned char);

/* SCSI message handler */
static int  nsp32_busfree_occur(Scsi_Cmnd *, unsigned short);
static void nsp32_msgout_occur (Scsi_Cmnd *);
static void nsp32_msgin_occur  (Scsi_Cmnd *, unsigned long, unsigned short);

static int  nsp32_setup_sg_table    (Scsi_Cmnd *);
static int  nsp32_selection_autopara(Scsi_Cmnd *);
static int  nsp32_selection_autoscsi(Scsi_Cmnd *);
static void nsp32_scsi_done         (Scsi_Cmnd *);
static int  nsp32_arbitration       (Scsi_Cmnd *, unsigned int);
static int  nsp32_reselection       (Scsi_Cmnd *, unsigned char);
static void nsp32_adjust_busfree    (Scsi_Cmnd *, unsigned int);
static void nsp32_restart_autoscsi  (Scsi_Cmnd *, unsigned short);

/* SCSI SDTR */
static void nsp32_analyze_sdtr       (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 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(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(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(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(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(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(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;