ini9100u.c

linux和2410结合开发 用他可以生成2410所需的zImage文件

			break;
		case 3:
			ok = request_irq(pHCB->HCS_Intr, i91u_intr3, SA_INTERRUPT | SA_SHIRQ, "i91u", hreg);
			break;
		case 4:
			ok = request_irq(pHCB->HCS_Intr, i91u_intr4, SA_INTERRUPT | SA_SHIRQ, "i91u", hreg);
			break;
		case 5:
			ok = request_irq(pHCB->HCS_Intr, i91u_intr5, SA_INTERRUPT | SA_SHIRQ, "i91u", hreg);
			break;
		case 6:
			ok = request_irq(pHCB->HCS_Intr, i91u_intr6, SA_INTERRUPT | SA_SHIRQ, "i91u", hreg);
			break;
		case 7:
			ok = request_irq(pHCB->HCS_Intr, i91u_intr7, SA_INTERRUPT | SA_SHIRQ, "i91u", hreg);
			break;
		default:
			i91u_panic("i91u: Too many host adapters\n");
			break;
		}
		if (ok < 0) {
			if (ok == -EINVAL) {
				printk("i91u: bad IRQ %d.\n", pHCB->HCS_Intr);
				printk("         Contact author.\n");
			} else if (ok == -EBUSY)
				printk("i91u: IRQ %d already in use. Configure another.\n",
				       pHCB->HCS_Intr);
			else {
				printk("\ni91u: Unexpected error code on requesting IRQ %d.\n",
				       pHCB->HCS_Intr);
				printk("         Contact author.\n");
			}
			i91u_panic("i91u: driver needs an IRQ.\n");
		}
	}

	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;

	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->target;
	pSCB->SCB_Lun = SCpnt->lun;
	pSCB->SCB_Ident = SCpnt->lun | DISC_ALLOW;
	pSCB->SCB_Flags |= SCF_SENSE;	/* Turn on auto request sense   */

	pSCB->SCB_SensePtr = (U32) VIRT_TO_BUS(SCpnt->sense_buffer);

	pSCB->SCB_SenseLen = SENSE_SIZE;

	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               */
	}

	if (SCpnt->use_sg) {
		pSrbSG = (struct scatterlist *) SCpnt->request_buffer;
		if (SCpnt->use_sg == 1) {	/* If only one entry in the list *//*      treat it as regular I/O */
			pSCB->SCB_BufPtr = (U32) VIRT_TO_BUS(pSrbSG->address);
			TotalLen = pSrbSG->length;
			pSCB->SCB_SGLen = 0;
		} else {	/* Assign SG physical address   */
			pSCB->SCB_BufPtr = pSCB->SCB_SGPAddr;
			pSCB->SCB_Flags |= SCF_SG;	/* Turn on SG list flag       */
			for (i = 0, TotalLen = 0, pSG = &pSCB->SCB_SGList[0];	/* 1.01g */
			     i < SCpnt->use_sg;
			     i++, pSG++, pSrbSG++) {
				pSG->SG_Ptr = (U32) VIRT_TO_BUS(pSrbSG->address);
				TotalLen += pSG->SG_Len = pSrbSG->length;
			}
			pSCB->SCB_SGLen = i;
		}
		pSCB->SCB_BufLen = (SCpnt->request_bufflen > TotalLen) ?
		    TotalLen : SCpnt->request_bufflen;
	} else {		/* Non SG                       */
		pSCB->SCB_BufPtr = (U32) VIRT_TO_BUS(SCpnt->request_buffer);
		pSCB->SCB_BufLen = SCpnt->request_bufflen;
		pSCB->SCB_SGLen = 0;
	}

	return;
}

/* 
 *  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->lun > 16) {	/* 07/22/98 */

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

/*
 *  We only support command in interrupt-driven fashion
 */
int i91u_command(Scsi_Cmnd * SCpnt)
{
	printk("i91u: interrupt driven driver; use i91u_queue()\n");
	return -1;
}

/*
 *  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->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->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->target, reset_flags);
}

/*
 * Return the "logical geometry"
 */
int i91u_biosparam(Scsi_Disk * disk, kdev_t dev, int *info_array)
{
	HCS *pHcb;		/* Point to Host adapter control block */
	TCS *pTcb;

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

	if (pTcb->TCS_DrvHead) {
		info_array[0] = pTcb->TCS_DrvHead;
		info_array[1] = pTcb->TCS_DrvSector;
		info_array[2] = disk->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] = disk->capacity / 255 / 63;
		} else {
			info_array[0] = 64;
			info_array[1] = 32;
			info_array[2] = disk->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;
}

/*****************************************************************************
 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");
	}
	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;
}

/*
 * Interrupts handler (main routine of the driver)
 */
static void i91u_intr0(int irqno, void *dev_id, struct pt_regs *regs)
{
	unsigned long flags;

	if (tul_hcs[0].HCS_Intr != irqno)
		return;

	spin_lock_irqsave(&io_request_lock, flags);

	tul_isr(&tul_hcs[0]);

	spin_unlock_irqrestore(&io_request_lock, flags);
}

static void i91u_intr1(int irqno, void *dev_id, struct pt_regs *regs)
{
	unsigned long flags;

	if (tul_hcs[1].HCS_Intr != irqno)
		return;

	spin_lock_irqsave(&io_request_lock, flags);

	tul_isr(&tul_hcs[1]);

	spin_unlock_irqrestore(&io_request_lock, flags);
}

static void i91u_intr2(int irqno, void *dev_id, struct pt_regs *regs)
{
	unsigned long flags;

	if (tul_hcs[2].HCS_Intr != irqno)
		return;

	spin_lock_irqsave(&io_request_lock, flags);

	tul_isr(&tul_hcs[2]);

	spin_unlock_irqrestore(&io_request_lock, flags);
}

static void i91u_intr3(int irqno, void *dev_id, struct pt_regs *regs)
{
	unsigned long flags;

	if (tul_hcs[3].HCS_Intr != irqno)
		return;

	spin_lock_irqsave(&io_request_lock, flags);

	tul_isr(&tul_hcs[3]);

	spin_unlock_irqrestore(&io_request_lock, flags);
}

static void i91u_intr4(int irqno, void *dev_id, struct pt_regs *regs)
{
	unsigned long flags;

	if (tul_hcs[4].HCS_Intr != irqno)
		return;

	spin_lock_irqsave(&io_request_lock, flags);

	tul_isr(&tul_hcs[4]);

	spin_unlock_irqrestore(&io_request_lock, flags);
}

static void i91u_intr5(int irqno, void *dev_id, struct pt_regs *regs)
{
	unsigned long flags;

	if (tul_hcs[5].HCS_Intr != irqno)
		return;

	spin_lock_irqsave(&io_request_lock, flags);

	tul_isr(&tul_hcs[5]);

	spin_unlock_irqrestore(&io_request_lock, flags);
}

static void i91u_intr6(int irqno, void *dev_id, struct pt_regs *regs)
{
	unsigned long flags;

	if (tul_hcs[6].HCS_Intr != irqno)
		return;

	spin_lock_irqsave(&io_request_lock, flags);

	tul_isr(&tul_hcs[6]);

	spin_unlock_irqrestore(&io_request_lock, flags);
}

static void i91u_intr7(int irqno, void *dev_id, struct pt_regs *regs)
{
	unsigned long flags;

	if (tul_hcs[7].HCS_Intr != irqno)
		return;

	spin_lock_irqsave(&io_request_lock, flags);

	tul_isr(&tul_hcs[7]);

	spin_unlock_irqrestore(&io_request_lock, flags);
}

/* 
 * 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");