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[linux-2.6.9-moxart.git] / drivers / scsi / ini9100u.c

/**************************************************************************
 * Initio 9100 device driver for Linux.
 *
 * Copyright (c) 1994-1998 Initio Corporation
 * Copyright (c) 1998 Bas Vermeulen <bvermeul@blackstar.xs4all.nl>
 * All rights reserved.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * --------------------------------------------------------------------------
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification, immediately at the beginning of the file.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * Where this Software is combined with software released under the terms of 
 * the GNU General Public License ("GPL") and the terms of the GPL would require the 
 * combined work to also be released under the terms of the GPL, the terms
 * and conditions of this License will apply in addition to those of the
 * GPL with the exception of any terms or conditions of this License that
 * conflict with, or are expressly prohibited by, the GPL.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *************************************************************************
 *
 * DESCRIPTION:
 *
 * This is the Linux low-level SCSI driver for Initio INI-9X00U/UW SCSI host
 * adapters
 *
 * 08/06/97 hc  - v1.01h
 *              - Support inic-940 and inic-935
 * 09/26/97 hc  - v1.01i
 *              - Make correction from J.W. Schultz suggestion
 * 10/13/97 hc  - Support reset function
 * 10/21/97 hc  - v1.01j
 *              - Support 32 LUN (SCSI 3)
 * 01/14/98 hc  - v1.01k
 *              - Fix memory allocation problem
 * 03/04/98 hc  - v1.01l
 *              - Fix tape rewind which will hang the system problem
 *              - Set can_queue to tul_num_scb
 * 06/25/98 hc  - v1.01m
 *              - Get it work for kernel version >= 2.1.75
 *              - Dynamic assign SCSI bus reset holding time in init_tulip()
 * 07/02/98 hc  - v1.01n
 *              - Support 0002134A
 * 08/07/98 hc  - v1.01o
 *              - Change the tul_abort_srb routine to use scsi_done. <01>
 * 09/07/98 hl  - v1.02
 *              - Change the INI9100U define and proc_dir_entry to
 *                reflect the newer Kernel 2.1.118, but the v1.o1o
 *                should work with Kernel 2.1.118.
 * 09/20/98 wh  - v1.02a
 *              - Support Abort command.
 *              - Handle reset routine.
 * 09/21/98 hl  - v1.03
 *              - remove comments.
 * 12/09/98 bv  - v1.03a
 *              - Removed unused code
 * 12/13/98 bv  - v1.03b
 *              - Remove cli() locking for kernels >= 2.1.95. This uses
 *                spinlocks to serialize access to the pSRB_head and
 *                pSRB_tail members of the HCS structure.
 * 09/01/99 bv  - v1.03d
 *              - Fixed a deadlock problem in SMP.
 * 21/01/99 bv  - v1.03e
 *              - Add support for the Domex 3192U PCI SCSI
 *                This is a slightly modified patch by
 *                Brian Macy <bmacy@sunshinecomputing.com>
 * 22/02/99 bv  - v1.03f
 *              - Didn't detect the INIC-950 in 2.0.x correctly.
 *                Now fixed.
 * 05/07/99 bv  - v1.03g
 *              - Changed the assumption that HZ = 100
 * 10/17/03 mc  - v1.04
 *              - added new DMA API support
 * 06/01/04 jmd - v1.04a
 *              - Re-add reset_bus support
 **************************************************************************/

#define CVT_LINUX_VERSION(V,P,S)        (V * 65536 + P * 256 + S)

#ifndef LINUX_VERSION_CODE
#include <linux/version.h>
#endif

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/spinlock.h>
#include <linux/stat.h>
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/string.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/slab.h>

#include <asm/io.h>

#include "scsi.h"
#include <scsi/scsi_host.h>
#include "ini9100u.h"

#ifdef DEBUG_i91u
unsigned int i91u_debug = DEBUG_DEFAULT;
#endif

static Scsi_Host_Template driver_template = {
        .proc_name      = "INI9100U",
        .name           = i91u_REVID,
        .detect         = i91u_detect,
        .release        = i91u_release,
        .queuecommand   = i91u_queue,
//      .abort          = i91u_abort,
//      .reset          = i91u_reset,
        .eh_bus_reset_handler = i91u_bus_reset,
        .bios_param     = i91u_biosparam,
        .can_queue      = 1,
        .this_id        = 1,
        .sg_tablesize   = SG_ALL,
        .cmd_per_lun    = 1,
        .use_clustering = ENABLE_CLUSTERING,
};
#include "scsi_module.c"

char *i91uCopyright = "Copyright (C) 1996-98";
char *i91uInitioName = "by Initio Corporation";
char *i91uProductName = "INI-9X00U/UW";
char *i91uVersion = "v1.04a";

#define TULSZ(sz)     (sizeof(sz) / sizeof(sz[0]))
#define TUL_RDWORD(x,y)         (short)(inl((int)((ULONG)((ULONG)x+(UCHAR)y)) ))

/* set by i91_setup according to the command line */
static int setup_called = 0;

static int tul_num_ch = 4;      /* Maximum 4 adapters           */
static int tul_num_scb;
static int tul_tag_enable = 1;
static SCB *tul_scb;

#ifdef DEBUG_i91u
static int setup_debug = 0;
#endif

static char *setup_str = (char *) NULL;

static void i91u_panic(char *msg);

static void i91uSCBPost(BYTE * pHcb, BYTE * pScb);

                                /* ---- EXTERNAL FUNCTIONS ---- */
                                        /* Get total number of adapters */
extern void init_i91uAdapter_table(void);
extern int Addi91u_into_Adapter_table(WORD, WORD, BYTE, BYTE, BYTE);
extern int tul_ReturnNumberOfAdapters(void);
extern void get_tulipPCIConfig(HCS * pHCB, int iChannel_index);
extern int init_tulip(HCS * pHCB, SCB * pSCB, int tul_num_scb, BYTE * pbBiosAdr, int reset_time);
extern SCB *tul_alloc_scb(HCS * pHCB);
extern int tul_abort_srb(HCS * pHCB, Scsi_Cmnd * pSRB);
extern void tul_exec_scb(HCS * pHCB, SCB * pSCB);
extern void tul_release_scb(HCS * pHCB, SCB * pSCB);
extern void tul_stop_bm(HCS * pHCB);
extern int tul_reset_scsi(HCS * pCurHcb, int seconds);
extern int tul_isr(HCS * pHCB);
extern int tul_reset(HCS * pHCB, Scsi_Cmnd * pSRB, unsigned char target);
extern int tul_reset_scsi_bus(HCS * pCurHcb);
extern int tul_device_reset(HCS * pCurHcb, ULONG pSrb, unsigned int target, unsigned int ResetFlags);
                                /* ---- EXTERNAL VARIABLES ---- */
extern HCS tul_hcs[];

const PCI_ID i91u_pci_devices[] = {
        { INI_VENDOR_ID, I950_DEVICE_ID },
        { INI_VENDOR_ID, I940_DEVICE_ID },
        { INI_VENDOR_ID, I935_DEVICE_ID },
        { INI_VENDOR_ID, I920_DEVICE_ID },
        { DMX_VENDOR_ID, I920_DEVICE_ID },
};

/*
 *  queue services:
 */
/*****************************************************************************
 Function name  : i91uAppendSRBToQueue
 Description    : This function will push current request into save list
 Input          : pSRB  -       Pointer to SCSI request block.
                  pHCB  -       Pointer to host adapter structure
 Output         : None.
 Return         : None.
*****************************************************************************/
static void i91uAppendSRBToQueue(HCS * pHCB, Scsi_Cmnd * pSRB)
{
        ULONG flags;
        spin_lock_irqsave(&(pHCB->pSRB_lock), flags);

        pSRB->host_scribble = NULL;     /* Pointer to next */

        if (pHCB->pSRB_head == NULL)
                pHCB->pSRB_head = pSRB;
        else
                pHCB->pSRB_tail->host_scribble = (char *)pSRB;  /* Pointer to next */
        pHCB->pSRB_tail = pSRB;

        spin_unlock_irqrestore(&(pHCB->pSRB_lock), flags);
        return;
}

/*****************************************************************************
 Function name  : i91uPopSRBFromQueue
 Description    : This function will pop current request from save list
 Input          : pHCB  -       Pointer to host adapter structure
 Output         : None.
 Return         : pSRB  -       Pointer to SCSI request block.
*****************************************************************************/
static Scsi_Cmnd *i91uPopSRBFromQueue(HCS * pHCB)
{
        Scsi_Cmnd *pSRB;
        ULONG flags;

        spin_lock_irqsave(&(pHCB->pSRB_lock), flags);

        if ((pSRB = pHCB->pSRB_head) != NULL) {
                pHCB->pSRB_head = (struct scsi_cmnd *)pHCB->pSRB_head->host_scribble;
                pSRB->host_scribble = NULL;
        }
        spin_unlock_irqrestore(&(pHCB->pSRB_lock), flags);

        return (pSRB);
}

static irqreturn_t i91u_intr(int irqno, void *dev_id, struct pt_regs *regs)
{
        struct Scsi_Host *dev = dev_id;
        unsigned long flags;
        
        spin_lock_irqsave(dev->host_lock, flags);
        tul_isr((HCS *)dev->base);
        spin_unlock_irqrestore(dev->host_lock, flags);
        return IRQ_HANDLED;
}

/* called from init/main.c */

void i91u_setup(char *str, int *ints)
{
        if (setup_called)
                i91u_panic("i91u: i91u_setup called twice.\n");

        setup_called = ints[0];
        setup_str = str;

#ifdef DEBUG_i91u
        setup_debug = ints[0] >= 1 ? ints[1] : DEBUG_DEFAULT;
#endif
}

int tul_NewReturnNumberOfAdapters(void)
{
        struct pci_dev *pDev = NULL;    /* Start from none              */
        int iAdapters = 0;
        long dRegValue;
        WORD wBIOS;
        int i = 0;

        init_i91uAdapter_table();

        for (i = 0; i < TULSZ(i91u_pci_devices); i++)
        {
                while ((pDev = pci_find_device(i91u_pci_devices[i].vendor_id, i91u_pci_devices[i].device_id, pDev)) != NULL) {
                        if (pci_enable_device(pDev))
                                continue;
                        pci_read_config_dword(pDev, 0x44, (u32 *) & dRegValue);
                        wBIOS = (UWORD) (dRegValue & 0xFF);
                        if (((dRegValue & 0xFF00) >> 8) == 0xFF)
                                dRegValue = 0;
                        wBIOS = (wBIOS << 8) + ((UWORD) ((dRegValue & 0xFF00) >> 8));
                        if (pci_set_dma_mask(pDev, 0xffffffff)) {
                                printk(KERN_WARNING 
                                       "i91u: Could not set 32 bit DMA mask\n");
                                continue;
                        }

                        if (Addi91u_into_Adapter_table(wBIOS,
                                                        (pDev->resource[0].start),
                                                        pDev->irq,
                                                        pDev->bus->number,
                                                        (pDev->devfn >> 3)
                                ) == 0)
                                iAdapters++;
                }
        }

        return (iAdapters);
}

int i91u_detect(Scsi_Host_Template * tpnt)
{
        HCS *pHCB;
        struct Scsi_Host *hreg;
        unsigned long i;        /* 01/14/98                     */
        int ok = 0, iAdapters;
        ULONG dBiosAdr;
        BYTE *pbBiosAdr;

        tpnt->proc_name = "INI9100U";

        if (setup_called) {     /* Setup by i91u_setup          */
                printk("i91u: processing commandline: ");

#ifdef DEBUG_i91u
                if (setup_called > 1) {
                        printk("\ni91u: %s\n", setup_str);
                        printk("i91u: usage: i91u[=<DEBUG>]\n");
                        i91u_panic("i91u panics in line %d", __LINE__);
                }
                i91u_debug = setup_debug;
#endif
        }
        /* Get total number of adapters in the motherboard */
        iAdapters = tul_NewReturnNumberOfAdapters();
        if (iAdapters == 0)     /* If no tulip founded, return */
                return (0);

        tul_num_ch = (iAdapters > tul_num_ch) ? tul_num_ch : iAdapters;
        /* Update actually channel number */
        if (tul_tag_enable) {   /* 1.01i                  */
                tul_num_scb = MAX_TARGETS * i91u_MAXQUEUE;
        } else {
                tul_num_scb = MAX_TARGETS + 3;  /* 1-tape, 1-CD_ROM, 1- extra */
        }                       /* Update actually SCBs per adapter */

        /* Get total memory needed for HCS */
        i = tul_num_ch * sizeof(HCS);
        memset((unsigned char *) &tul_hcs[0], 0, i);    /* Initialize tul_hcs 0 */
        /* Get total memory needed for SCB */

        for (; tul_num_scb >= MAX_TARGETS + 3; tul_num_scb--) {
                i = tul_num_ch * tul_num_scb * sizeof(SCB);
                if ((tul_scb = (SCB *) kmalloc(i, GFP_ATOMIC | GFP_DMA)) != NULL)
                        break;
        }
        if (tul_scb == NULL) {
                printk("i91u: SCB memory allocation error\n");
                return (0);
        }
        memset((unsigned char *) tul_scb, 0, i);

        for (i = 0, pHCB = &tul_hcs[0];         /* Get pointer for control block */
             i < tul_num_ch;
             i++, pHCB++) {
                pHCB->pSRB_head = NULL;         /* Initial SRB save queue       */
                pHCB->pSRB_tail = NULL;         /* Initial SRB save queue       */
                pHCB->pSRB_lock = SPIN_LOCK_UNLOCKED;   /* SRB save queue lock */
                get_tulipPCIConfig(pHCB, i);

                dBiosAdr = pHCB->HCS_BIOS;
                dBiosAdr = (dBiosAdr << 4);

                pbBiosAdr = phys_to_virt(dBiosAdr);

                init_tulip(pHCB, tul_scb + (i * tul_num_scb), tul_num_scb, pbBiosAdr, 10);
                request_region(pHCB->HCS_Base, 256, "i91u"); /* Register */ 

                pHCB->HCS_Index = i;    /* 7/29/98 */
                hreg = scsi_register(tpnt, sizeof(HCS));
                if(hreg == NULL) {
                        release_region(pHCB->HCS_Base, 256);
                        return 0;
                }
                hreg->io_port = pHCB->HCS_Base;
                hreg->n_io_port = 0xff;
                hreg->can_queue = tul_num_scb;  /* 03/05/98                      */
                hreg->unique_id = pHCB->HCS_Base;
                hreg->max_id = pHCB->HCS_MaxTar;
                hreg->max_lun = 32;     /* 10/21/97                     */
                hreg->irq = pHCB->HCS_Intr;
                hreg->this_id = pHCB->HCS_SCSI_ID;      /* Assign HCS index           */
                hreg->base = (unsigned long)pHCB;
                hreg->sg_tablesize = TOTAL_SG_ENTRY;    /* Maximun support is 32 */

                /* Initial tulip chip           */
                ok = request_irq(pHCB->HCS_Intr, i91u_intr, SA_INTERRUPT | SA_SHIRQ, "i91u", hreg);
                if (ok < 0) {
                        printk(KERN_WARNING "i91u: unable to request IRQ %d\n\n", pHCB->HCS_Intr);
                        return 0;
                }
        }

        tpnt->this_id = -1;
        tpnt->can_queue = 1;

        return 1;
}

static void i91uBuildSCB(HCS * pHCB, SCB * pSCB, Scsi_Cmnd * SCpnt)
{                               /* Create corresponding SCB     */
        struct scatterlist *pSrbSG;
        SG *pSG;                /* Pointer to SG list           */
        int i;
        long TotalLen;
        dma_addr_t dma_addr;

        pSCB->SCB_Post = i91uSCBPost;   /* i91u's callback routine      */
        pSCB->SCB_Srb = SCpnt;
        pSCB->SCB_Opcode = ExecSCSI;
        pSCB->SCB_Flags = SCF_POST;     /* After SCSI done, call post routine */
        pSCB->SCB_Target = SCpnt->device->id;
        pSCB->SCB_Lun = SCpnt->device->lun;
        pSCB->SCB_Ident = SCpnt->device->lun | DISC_ALLOW;

        pSCB->SCB_Flags |= SCF_SENSE;   /* Turn on auto request sense   */
        dma_addr = dma_map_single(&pHCB->pci_dev->dev, SCpnt->sense_buffer,
                                  SENSE_SIZE, DMA_FROM_DEVICE);
        pSCB->SCB_SensePtr = cpu_to_le32((u32)dma_addr);
        pSCB->SCB_SenseLen = cpu_to_le32(SENSE_SIZE);
        SCpnt->SCp.ptr = (char *)(unsigned long)dma_addr;

        pSCB->SCB_CDBLen = SCpnt->cmd_len;
        pSCB->SCB_HaStat = 0;
        pSCB->SCB_TaStat = 0;
        memcpy(&pSCB->SCB_CDB[0], &SCpnt->cmnd, SCpnt->cmd_len);

        if (SCpnt->device->tagged_supported) {  /* Tag Support                  */
                pSCB->SCB_TagMsg = SIMPLE_QUEUE_TAG;    /* Do simple tag only   */
        } else {
                pSCB->SCB_TagMsg = 0;   /* No tag support               */
        }
        /* todo handle map_sg error */
        if (SCpnt->use_sg) {
                dma_addr = dma_map_single(&pHCB->pci_dev->dev, &pSCB->SCB_SGList[0],
                                          sizeof(struct SG_Struc) * TOTAL_SG_ENTRY,
                                          DMA_BIDIRECTIONAL);
                pSCB->SCB_BufPtr = cpu_to_le32((u32)dma_addr);
                SCpnt->SCp.dma_handle = dma_addr;

                pSrbSG = (struct scatterlist *) SCpnt->request_buffer;
                pSCB->SCB_SGLen = dma_map_sg(&pHCB->pci_dev->dev, pSrbSG,
                                             SCpnt->use_sg, SCpnt->sc_data_direction);

                pSCB->SCB_Flags |= SCF_SG;      /* Turn on SG list flag       */
                for (i = 0, TotalLen = 0, pSG = &pSCB->SCB_SGList[0];   /* 1.01g */
                     i < pSCB->SCB_SGLen; i++, pSG++, pSrbSG++) {
                        pSG->SG_Ptr = cpu_to_le32((u32)sg_dma_address(pSrbSG));
                        TotalLen += pSG->SG_Len = cpu_to_le32((u32)sg_dma_len(pSrbSG));
                }

                pSCB->SCB_BufLen = (SCpnt->request_bufflen > TotalLen) ?
                    TotalLen : SCpnt->request_bufflen;
        } else if (SCpnt->request_bufflen) {            /* Non SG */
                dma_addr = dma_map_single(&pHCB->pci_dev->dev, SCpnt->request_buffer,
                                          SCpnt->request_bufflen,
                                          SCpnt->sc_data_direction);
                SCpnt->SCp.dma_handle = dma_addr;
                pSCB->SCB_BufPtr = cpu_to_le32((u32)dma_addr);
                pSCB->SCB_BufLen = cpu_to_le32((u32)SCpnt->request_bufflen);
                pSCB->SCB_SGLen = 0;
        } else {
                pSCB->SCB_BufLen = 0;
                pSCB->SCB_SGLen = 0;
        }
}

/* 
 *  Queue a command and setup interrupts for a free bus.
 */
int i91u_queue(Scsi_Cmnd * SCpnt, void (*done) (Scsi_Cmnd *))
{
        register SCB *pSCB;
        HCS *pHCB;              /* Point to Host adapter control block */

        if (SCpnt->device->lun > 16) {  /* 07/22/98 */

                SCpnt->result = (DID_TIME_OUT << 16);
                done(SCpnt);    /* Notify system DONE           */
                return (0);
        }
        pHCB = (HCS *) SCpnt->device->host->base;

        SCpnt->scsi_done = done;
        /* Get free SCSI control block  */
        if ((pSCB = tul_alloc_scb(pHCB)) == NULL) {
                i91uAppendSRBToQueue(pHCB, SCpnt);      /* Buffer this request  */
                return (0);
        }
        i91uBuildSCB(pHCB, pSCB, SCpnt);
        tul_exec_scb(pHCB, pSCB);       /* Start execute SCB            */
        return (0);
}

/*
 *  Abort a queued command
 *  (commands that are on the bus can't be aborted easily)
 */
int i91u_abort(Scsi_Cmnd * SCpnt)
{
        HCS *pHCB;

        pHCB = (HCS *) SCpnt->device->host->base;
        return tul_abort_srb(pHCB, SCpnt);
}

/*
 *  Reset registers, reset a hanging bus and
 *  kill active and disconnected commands for target w/o soft reset
 */
int i91u_reset(Scsi_Cmnd * SCpnt, unsigned int reset_flags)
{                               /* I need Host Control Block Information */
        HCS *pHCB;

        pHCB = (HCS *) SCpnt->device->host->base;

        if (reset_flags & (SCSI_RESET_SUGGEST_BUS_RESET | SCSI_RESET_SUGGEST_HOST_RESET))
                return tul_reset_scsi_bus(pHCB);
        else
                return tul_device_reset(pHCB, (ULONG) SCpnt, SCpnt->device->id, reset_flags);
}

int i91u_bus_reset(Scsi_Cmnd * SCpnt)
{
        HCS *pHCB;

        pHCB = (HCS *) SCpnt->device->host->base;
        tul_reset_scsi(pHCB, 0);
        return SUCCESS;
}

/*
 * Return the "logical geometry"
 */
int i91u_biosparam(struct scsi_device *sdev, struct block_device *dev,
                sector_t capacity, int *info_array)
{
        HCS *pHcb;              /* Point to Host adapter control block */
        TCS *pTcb;

        pHcb = (HCS *) sdev->host->base;
        pTcb = &pHcb->HCS_Tcs[sdev->id];

        if (pTcb->TCS_DrvHead) {
                info_array[0] = pTcb->TCS_DrvHead;
                info_array[1] = pTcb->TCS_DrvSector;
                info_array[2] = (unsigned long)capacity / pTcb->TCS_DrvHead / pTcb->TCS_DrvSector;
        } else {
                if (pTcb->TCS_DrvFlags & TCF_DRV_255_63) {
                        info_array[0] = 255;
                        info_array[1] = 63;
                        info_array[2] = (unsigned long)capacity / 255 / 63;
                } else {
                        info_array[0] = 64;
                        info_array[1] = 32;
                        info_array[2] = (unsigned long)capacity >> 11;
                }
        }

#if defined(DEBUG_BIOSPARAM)
        if (i91u_debug & debug_biosparam) {
                printk("bios geometry: head=%d, sec=%d, cyl=%d\n",
                       info_array[0], info_array[1], info_array[2]);
                printk("WARNING: check, if the bios geometry is correct.\n");
        }
#endif

        return 0;
}

static void i91u_unmap_cmnd(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd)
{
        /* auto sense buffer */
        if (cmnd->SCp.ptr) {
                dma_unmap_single(&pci_dev->dev,
                                 (dma_addr_t)((unsigned long)cmnd->SCp.ptr),
                                 SENSE_SIZE, SCSI_DATA_READ);
                cmnd->SCp.ptr = NULL;
        }

        /* request buffer */
        if (cmnd->use_sg) {
                dma_unmap_single(&pci_dev->dev, cmnd->SCp.dma_handle,
                                 sizeof(struct SG_Struc) * TOTAL_SG_ENTRY,
                                 DMA_BIDIRECTIONAL);

                dma_unmap_sg(&pci_dev->dev, cmnd->request_buffer,
                             cmnd->use_sg,
                             cmnd->sc_data_direction);
        } else if (cmnd->request_bufflen) {
                dma_unmap_single(&pci_dev->dev, cmnd->SCp.dma_handle,
                                 cmnd->request_bufflen,
                                 cmnd->sc_data_direction);
        }
}

/*****************************************************************************
 Function name  : i91uSCBPost
 Description    : This is callback routine be called when tulip finish one
                        SCSI command.
 Input          : pHCB  -       Pointer to host adapter control block.
                  pSCB  -       Pointer to SCSI control block.
 Output         : None.
 Return         : None.
*****************************************************************************/
static void i91uSCBPost(BYTE * pHcb, BYTE * pScb)
{
        Scsi_Cmnd *pSRB;        /* Pointer to SCSI request block */
        HCS *pHCB;
        SCB *pSCB;

        pHCB = (HCS *) pHcb;
        pSCB = (SCB *) pScb;
        if ((pSRB = pSCB->SCB_Srb) == 0) {
                printk("i91uSCBPost: SRB pointer is empty\n");

                tul_release_scb(pHCB, pSCB);    /* Release SCB for current channel */
                return;
        }
        switch (pSCB->SCB_HaStat) {
        case 0x0:
        case 0xa:               /* Linked command complete without error and linked normally */
        case 0xb:               /* Linked command complete without error interrupt generated */
                pSCB->SCB_HaStat = 0;
                break;

        case 0x11:              /* Selection time out-The initiator selection or target
                                   reselection was not complete within the SCSI Time out period */
                pSCB->SCB_HaStat = DID_TIME_OUT;
                break;

        case 0x14:              /* Target bus phase sequence failure-An invalid bus phase or bus
                                   phase sequence was requested by the target. The host adapter
                                   will generate a SCSI Reset Condition, notifying the host with
                                   a SCRD interrupt */
                pSCB->SCB_HaStat = DID_RESET;
                break;

        case 0x1a:              /* SCB Aborted. 07/21/98 */
                pSCB->SCB_HaStat = DID_ABORT;
                break;

        case 0x12:              /* Data overrun/underrun-The target attempted to transfer more data
                                   than was allocated by the Data Length field or the sum of the
                                   Scatter / Gather Data Length fields. */
        case 0x13:              /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
        case 0x16:              /* Invalid SCB Operation Code. */

        default:
                printk("ini9100u: %x %x\n", pSCB->SCB_HaStat, pSCB->SCB_TaStat);
                pSCB->SCB_HaStat = DID_ERROR;   /* Couldn't find any better */
                break;
        }

        pSRB->result = pSCB->SCB_TaStat | (pSCB->SCB_HaStat << 16);

        if (pSRB == NULL) {
                printk("pSRB is NULL\n");
        }

        i91u_unmap_cmnd(pHCB->pci_dev, pSRB);
        pSRB->scsi_done(pSRB);  /* Notify system DONE           */
        if ((pSRB = i91uPopSRBFromQueue(pHCB)) != NULL)
                /* Find the next pending SRB    */
        {                       /* Assume resend will success   */
                /* Reuse old SCB                */
                i91uBuildSCB(pHCB, pSCB, pSRB);         /* Create corresponding SCB     */

                tul_exec_scb(pHCB, pSCB);       /* Start execute SCB            */
        } else {                /* No Pending SRB               */
                tul_release_scb(pHCB, pSCB);    /* Release SCB for current channel */
        }
        return;
}

/* 
 * Dump the current driver status and panic...
 */
static void i91u_panic(char *msg)
{
        printk("\ni91u_panic: %s\n", msg);
        panic("i91u panic");
}

/*
 * Release ressources
 */
int i91u_release(struct Scsi_Host *hreg)
{
        free_irq(hreg->irq, hreg);
        release_region(hreg->io_port, 256);
        return 0;
}
MODULE_LICENSE("Dual BSD/GPL");