Commit 757f5bad authored by Finn Thain's avatar Finn Thain Committed by Christoph Hellwig
Browse files

scsi/NCR5380: merge sun3_scsi_vme.c into sun3_scsi.c 



The sun3 drivers suffer from a whole bunch of duplicated code. Fix this
by following the g_NCR5380_mmio example. (Notionally, sun3_scsi relates to
sun3_scsi_vme in the same way that g_NCR5380 relates to g_NCR5380_mmio.)

Dead code is also removed: we now have working debug macros so
SUN3_SCSI_DEBUG is undesirable. Dead code within #ifdef OLD_DMA is also
dropped, consistent with sun3_scsi_vme.c.

Signed-off-by: default avatarFinn Thain <fthain@telegraphics.com.au>
Acked-by: default avatarSam Creasey <sammy@sammy.net>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 9f6620a3

drivers/scsi/sun3_scsi.c

+171 −52
Original line number Diff line number Diff line
@@ -3,6 +3,10 @@ 
 *

 * Sun3 DMA routines added by Sam Creasey (sammy@sammy.net)

 *

 * VME support added by Sam Creasey

 *

 * TODO: modify this driver to support multiple Sun3 SCSI VME boards

 *

 * Adapted from mac_scsinew.c:

 */

/*
@@ -73,7 +77,7 @@ 
#include "sun3_scsi.h"

#include "NCR5380.h"



/* #define OLDDMA */

extern int sun3_map_test(unsigned long, char *);



#define USE_WRAPPER

/*#define RESET_BOOT */
@@ -89,7 +93,11 @@ 


/* #define SUPPORT_TAGS */



#ifdef SUN3_SCSI_VME

#define ENABLE_IRQ()

#else

#define	ENABLE_IRQ()	enable_irq( IRQ_SUN3_SCSI ); 

#endif





static irqreturn_t scsi_sun3_intr(int irq, void *dummy);
@@ -126,10 +134,9 @@ static struct scsi_cmnd *sun3_dma_setup_done = NULL; 


static volatile unsigned char *sun3_scsi_regp;

static volatile struct sun3_dma_regs *dregs;

#ifdef OLDDMA

static unsigned char *dmabuf = NULL; /* dma memory buffer */

#endif

#ifndef SUN3_SCSI_VME

static struct sun3_udc_regs *udc_regs = NULL;

#endif

static unsigned char *sun3_dma_orig_addr = NULL;

static unsigned long sun3_dma_orig_count = 0;

static int sun3_dma_active = 0;
@@ -149,6 +156,7 @@ static inline void sun3scsi_write(int reg, int value) 
	sun3_scsi_regp[reg] = value;

}



#ifndef SUN3_SCSI_VME

/* dma controller register access functions */



static inline unsigned short sun3_udc_read(unsigned char reg)
@@ -170,6 +178,7 @@ static inline void sun3_udc_write(unsigned short val, unsigned char reg) 
	dregs->udc_data = val;

	udelay(SUN3_DMA_DELAY);

}

#endif



/*

 * XXX: status debug
@@ -188,17 +197,32 @@ static struct Scsi_Host *default_instance; 
 *

 */

 

int __init sun3scsi_detect(struct scsi_host_template * tpnt)

static int __init sun3scsi_detect(struct scsi_host_template *tpnt)

{

	unsigned long ioaddr;

	unsigned long ioaddr, irq;

	static int called = 0;

	struct Scsi_Host *instance;

#ifdef SUN3_SCSI_VME

	int i;

	unsigned long addrs[3] = { IOBASE_SUN3_VMESCSI,

				   IOBASE_SUN3_VMESCSI + 0x4000,

				   0 };

	unsigned long vecs[3] = { SUN3_VEC_VMESCSI0,

				  SUN3_VEC_VMESCSI1,

				  0 };

#endif



	/* check that this machine has an onboard 5380 */

	switch(idprom->id_machtype) {

#ifdef SUN3_SCSI_VME

	case SM_SUN3|SM_3_160:

	case SM_SUN3|SM_3_260:

		break;

#else

	case SM_SUN3|SM_3_50:

	case SM_SUN3|SM_3_60:

		break;

#endif



	default:

		return 0;
@@ -207,7 +231,11 @@ int __init sun3scsi_detect(struct scsi_host_template * tpnt) 
	if(called)

		return 0;



#ifdef SUN3_SCSI_VME

	tpnt->proc_name = "Sun3 5380 VME SCSI";

#else

	tpnt->proc_name = "Sun3 5380 SCSI";

#endif



	/* setup variables */

	tpnt->can_queue =
@@ -224,6 +252,38 @@ int __init sun3scsi_detect(struct scsi_host_template * tpnt) 
		tpnt->this_id = 7;

	}



#ifdef SUN3_SCSI_VME

	ioaddr = 0;

	for (i = 0; addrs[i] != 0; i++) {

		unsigned char x;



		ioaddr = (unsigned long)sun3_ioremap(addrs[i], PAGE_SIZE,

						     SUN3_PAGE_TYPE_VME16);

		irq = vecs[i];

		sun3_scsi_regp = (unsigned char *)ioaddr;



		dregs = (struct sun3_dma_regs *)(((unsigned char *)ioaddr) + 8);



		if (sun3_map_test((unsigned long)dregs, &x)) {

			unsigned short oldcsr;



			oldcsr = dregs->csr;

			dregs->csr = 0;

			udelay(SUN3_DMA_DELAY);

			if (dregs->csr == 0x1400)

				break;



			dregs->csr = oldcsr;

		}



		iounmap((void *)ioaddr);

		ioaddr = 0;

	}



	if (!ioaddr)

		return 0;

#else

	irq = IRQ_SUN3_SCSI;

	ioaddr = (unsigned long)ioremap(IOBASE_SUN3_SCSI, PAGE_SIZE);

	sun3_scsi_regp = (unsigned char *)ioaddr;
@@ -234,11 +294,6 @@ int __init sun3scsi_detect(struct scsi_host_template * tpnt) 
	     printk("SUN3 Scsi couldn't allocate DVMA memory!\n");

	     return 0;

	}

#ifdef OLDDMA

	if((dmabuf = dvma_malloc_align(SUN3_DVMA_BUFSIZE, 0x10000)) == NULL) {

	     printk("SUN3 Scsi couldn't allocate DVMA memory!\n");

	     return 0;

	}

#endif

#ifdef SUPPORT_TAGS

	if (setup_use_tagged_queuing < 0)
@@ -252,7 +307,7 @@ int __init sun3scsi_detect(struct scsi_host_template * tpnt) 
	default_instance = instance;



        instance->io_port = (unsigned long) ioaddr;

	instance->irq = IRQ_SUN3_SCSI;

	instance->irq = irq;



	NCR5380_init(instance, 0);
@@ -273,7 +328,8 @@ int __init sun3scsi_detect(struct scsi_host_template * tpnt) 
#endif

	}

	

	printk("scsi%d: Sun3 5380 at port %lX irq", instance->host_no, instance->io_port);

	pr_info("scsi%d: %s at port %lX irq", instance->host_no,

		tpnt->proc_name, instance->io_port);

	if (instance->irq == SCSI_IRQ_NONE)

		printk ("s disabled");

	else
@@ -290,6 +346,15 @@ int __init sun3scsi_detect(struct scsi_host_template * tpnt) 
	dregs->csr = CSR_SCSI | CSR_FIFO | CSR_INTR;

	udelay(SUN3_DMA_DELAY);

	dregs->fifo_count = 0;

#ifdef SUN3_SCSI_VME

	dregs->fifo_count_hi = 0;

	dregs->dma_addr_hi = 0;

	dregs->dma_addr_lo = 0;

	dregs->dma_count_hi = 0;

	dregs->dma_count_lo = 0;



	dregs->ivect = VME_DATA24 | (instance->irq & 0xff);

#endif



	called = 1;
@@ -357,7 +422,8 @@ static void sun3_scsi_reset_boot(struct Scsi_Host *instance) 
}

#endif



const char * sun3scsi_info (struct Scsi_Host *spnt) {

static const char *sun3scsi_info(struct Scsi_Host *spnt)

{

    return "";

}
@@ -369,6 +435,10 @@ static irqreturn_t scsi_sun3_intr(int irq, void *dummy) 
	unsigned short csr = dregs->csr;

	int handled = 0;



#ifdef SUN3_SCSI_VME

	dregs->csr &= ~CSR_DMA_ENABLE;

#endif



	if(csr & ~CSR_GOOD) {

		if(csr & CSR_DMA_BUSERR) {

			printk("scsi%d: bus error in dma\n", default_instance->host_no);
@@ -412,31 +482,28 @@ void sun3_sun3_debug (void) 
/* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */

static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag)

{

#ifdef OLDDMA

	if(write_flag) 

		memcpy(dmabuf, data, count);

	else {

		sun3_dma_orig_addr = data;

		sun3_dma_orig_count = count;

	}

#else

	void *addr;



	if(sun3_dma_orig_addr != NULL)

		dvma_unmap(sun3_dma_orig_addr);



//	addr = sun3_dvma_page((unsigned long)data, (unsigned long)dmabuf);

#ifdef SUN3_SCSI_VME

	addr = (void *)dvma_map_vme((unsigned long) data, count);

#else

	addr = (void *)dvma_map((unsigned long) data, count);

#endif

		

	sun3_dma_orig_addr = addr;

	sun3_dma_orig_count = count;

#endif



#ifndef SUN3_SCSI_VME

	dregs->fifo_count = 0;

	sun3_udc_write(UDC_RESET, UDC_CSR);

	

	/* reset fifo */

	dregs->csr &= ~CSR_FIFO;

	dregs->csr |= CSR_FIFO;

#endif

	

	/* set direction */

	if(write_flag)
@@ -444,6 +511,17 @@ static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int wri 
	else

		dregs->csr &= ~CSR_SEND;

	

#ifdef SUN3_SCSI_VME

	dregs->csr |= CSR_PACK_ENABLE;



	dregs->dma_addr_hi = ((unsigned long)addr >> 16);

	dregs->dma_addr_lo = ((unsigned long)addr & 0xffff);



	dregs->dma_count_hi = 0;

	dregs->dma_count_lo = 0;

	dregs->fifo_count_hi = 0;

	dregs->fifo_count = 0;

#else

	/* byte count for fifo */

	dregs->fifo_count = count;
@@ -461,13 +539,8 @@ static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int wri 
	}



	/* setup udc */

#ifdef OLDDMA

	udc_regs->addr_hi = ((dvma_vtob(dmabuf) & 0xff0000) >> 8);

	udc_regs->addr_lo = (dvma_vtob(dmabuf) & 0xffff);

#else

	udc_regs->addr_hi = (((unsigned long)(addr) & 0xff0000) >> 8);

	udc_regs->addr_lo = ((unsigned long)(addr) & 0xffff);

#endif

	udc_regs->count = count/2; /* count in words */

	udc_regs->mode_hi = UDC_MODE_HIWORD;

	if(write_flag) {
@@ -491,11 +564,13 @@ static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int wri 


	/* interrupt enable */

	sun3_udc_write(UDC_INT_ENABLE, UDC_CSR);

#endif

	

       	return count;



}



#ifndef SUN3_SCSI_VME

static inline unsigned long sun3scsi_dma_count(struct Scsi_Host *instance)

{

	unsigned short resid;
@@ -508,6 +583,7 @@ static inline unsigned long sun3scsi_dma_count(struct Scsi_Host *instance) 


	return (unsigned long) resid;

}

#endif



static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance)

{
@@ -526,8 +602,23 @@ static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted, 


static inline int sun3scsi_dma_start(unsigned long count, unsigned char *data)

{

#ifdef SUN3_SCSI_VME

	unsigned short csr;



	csr = dregs->csr;



	dregs->dma_count_hi = (sun3_dma_orig_count >> 16);

	dregs->dma_count_lo = (sun3_dma_orig_count & 0xffff);



	dregs->fifo_count_hi = (sun3_dma_orig_count >> 16);

	dregs->fifo_count = (sun3_dma_orig_count & 0xffff);



/*	if(!(csr & CSR_DMA_ENABLE))

 *		dregs->csr |= CSR_DMA_ENABLE;

 */

#else

    sun3_udc_write(UDC_CHN_START, UDC_CSR);

#endif

    

    return 0;

}
@@ -535,12 +626,46 @@ static inline int sun3scsi_dma_start(unsigned long count, unsigned char *data) 
/* clean up after our dma is done */

static int sun3scsi_dma_finish(int write_flag)

{

	unsigned short count;

	unsigned short __maybe_unused count;

	unsigned short fifo;

	int ret = 0;

	

	sun3_dma_active = 0;

#if 1



#ifdef SUN3_SCSI_VME

	dregs->csr &= ~CSR_DMA_ENABLE;



	fifo = dregs->fifo_count;

	if (write_flag) {

		if ((fifo > 0) && (fifo < sun3_dma_orig_count))

			fifo++;

	}



	last_residual = fifo;

	/* empty bytes from the fifo which didn't make it */

	if ((!write_flag) && (dregs->csr & CSR_LEFT)) {

		unsigned char *vaddr;



		vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr);



		vaddr += (sun3_dma_orig_count - fifo);

		vaddr--;



		switch (dregs->csr & CSR_LEFT) {

		case CSR_LEFT_3:

			*vaddr = (dregs->bpack_lo & 0xff00) >> 8;

			vaddr--;



		case CSR_LEFT_2:

			*vaddr = (dregs->bpack_hi & 0x00ff);

			vaddr--;



		case CSR_LEFT_1:

			*vaddr = (dregs->bpack_hi & 0xff00) >> 8;

			break;

		}

	}

#else

	// check to empty the fifo on a read

	if(!write_flag) {

		int tmo = 20000; /* .2 sec */
@@ -557,27 +682,7 @@ static int sun3scsi_dma_finish(int write_flag) 
		}

	}



#endif



	count = sun3scsi_dma_count(default_instance);

#ifdef OLDDMA



	/* if we've finished a read, copy out the data we read */

 	if(sun3_dma_orig_addr) {

		/* check for residual bytes after dma end */

		if(count && (NCR5380_read(BUS_AND_STATUS_REG) &

			     (BASR_PHASE_MATCH | BASR_ACK))) {

			printk("scsi%d: sun3_scsi_finish: read overrun baby... ", default_instance->host_no);

			printk("basr now %02x\n", NCR5380_read(BUS_AND_STATUS_REG));

			ret = count;

		}

		

		/* copy in what we dma'd no matter what */

		memcpy(sun3_dma_orig_addr, dmabuf, sun3_dma_orig_count);

		sun3_dma_orig_addr = NULL;



	}

#else



	fifo = dregs->fifo_count;

	last_residual = fifo;
@@ -595,10 +700,23 @@ static int sun3scsi_dma_finish(int write_flag) 
		vaddr[-2] = (data & 0xff00) >> 8;

		vaddr[-1] = (data & 0xff);

	}

#endif



	dvma_unmap(sun3_dma_orig_addr);

	sun3_dma_orig_addr = NULL;

#endif



#ifdef SUN3_SCSI_VME

	dregs->dma_addr_hi = 0;

	dregs->dma_addr_lo = 0;

	dregs->dma_count_hi = 0;

	dregs->dma_count_lo = 0;



	dregs->fifo_count = 0;

	dregs->fifo_count_hi = 0;



	dregs->csr &= ~CSR_SEND;

/*	dregs->csr |= CSR_DMA_ENABLE; */

#else

	sun3_udc_write(UDC_RESET, UDC_CSR);

	dregs->fifo_count = 0;

	dregs->csr &= ~CSR_SEND;
@@ -606,6 +724,7 @@ static int sun3scsi_dma_finish(int write_flag) 
	/* reset fifo */

	dregs->csr &= ~CSR_FIFO;

	dregs->csr |= CSR_FIFO;

#endif

	

	sun3_dma_setup_done = NULL;

drivers/scsi/sun3_scsi_vme.c

+1 −582
Original line number Diff line number Diff line 
 /*

 * Sun3 SCSI stuff by Erik Verbruggen (erik@bigmama.xtdnet.nl)

 *

 * Sun3 DMA routines added by Sam Creasey (sammy@sammy.net)

 *

 * VME support added by Sam Creasey

 *

 * Adapted from sun3_scsi.c -- see there for other headers

 *

 * TODO: modify this driver to support multiple Sun3 SCSI VME boards

 *

 */



#define AUTOSENSE



#include <linux/types.h>

#include <linux/stddef.h>

#include <linux/ctype.h>

#include <linux/delay.h>



#include <linux/module.h>

#include <linux/signal.h>

#include <linux/ioport.h>

#include <linux/init.h>

#include <linux/blkdev.h>



#include <asm/io.h>



#include <asm/sun3ints.h>

#include <asm/dvma.h>

#include <asm/idprom.h>

#include <asm/machines.h>



#define SUN3_SCSI_VME



#undef SUN3_SCSI_DEBUG



/* dma on! */

#define REAL_DMA



#include "scsi.h"

#include "initio.h"

#include <scsi/scsi_host.h>

#include "sun3_scsi.h"

#include "NCR5380.h"



extern int sun3_map_test(unsigned long, char *);



#define USE_WRAPPER

/*#define RESET_BOOT */

#define DRIVER_SETUP



/*

 * BUG can be used to trigger a strange code-size related hang on 2.1 kernels

 */

#ifdef BUG

#undef RESET_BOOT

#undef DRIVER_SETUP

#endif



/* #define SUPPORT_TAGS */



//#define	ENABLE_IRQ()	enable_irq( SUN3_VEC_VMESCSI0 ); 

#define ENABLE_IRQ()





static irqreturn_t scsi_sun3_intr(int irq, void *dummy);

static inline unsigned char sun3scsi_read(int reg);

static inline void sun3scsi_write(int reg, int value);



static int setup_can_queue = -1;

module_param(setup_can_queue, int, 0);

static int setup_cmd_per_lun = -1;

module_param(setup_cmd_per_lun, int, 0);

static int setup_sg_tablesize = -1;

module_param(setup_sg_tablesize, int, 0);

#ifdef SUPPORT_TAGS

static int setup_use_tagged_queuing = -1;

module_param(setup_use_tagged_queuing, int, 0);

#endif

static int setup_hostid = -1;

module_param(setup_hostid, int, 0);



static struct scsi_cmnd *sun3_dma_setup_done = NULL;



#define	AFTER_RESET_DELAY	(HZ/2)



/* ms to wait after hitting dma regs */

#define SUN3_DMA_DELAY 10



/* dvma buffer to allocate -- 32k should hopefully be more than sufficient */

#define SUN3_DVMA_BUFSIZE 0xe000



/* minimum number of bytes to do dma on */

#define SUN3_DMA_MINSIZE 128



static volatile unsigned char *sun3_scsi_regp;

static volatile struct sun3_dma_regs *dregs;

#ifdef OLDDMA

static unsigned char *dmabuf = NULL; /* dma memory buffer */

#endif

static unsigned char *sun3_dma_orig_addr = NULL;

static unsigned long sun3_dma_orig_count = 0;

static int sun3_dma_active = 0;

static unsigned long last_residual = 0;



/*

 * NCR 5380 register access functions

 */



static inline unsigned char sun3scsi_read(int reg)

{

	return( sun3_scsi_regp[reg] );

}



static inline void sun3scsi_write(int reg, int value)

{

	sun3_scsi_regp[reg] = value;

}



/*

 * XXX: status debug

 */

static struct Scsi_Host *default_instance;



/*

 * Function : int sun3scsi_detect(struct scsi_host_template * tpnt)

 *

 * Purpose : initializes mac NCR5380 driver based on the

 *	command line / compile time port and irq definitions.

 *

 * Inputs : tpnt - template for this SCSI adapter.

 *

 * Returns : 1 if a host adapter was found, 0 if not.

 *

 */

 

static int __init sun3scsi_detect(struct scsi_host_template * tpnt)

{

	unsigned long ioaddr, irq = 0;

	static int called = 0;

	struct Scsi_Host *instance;

	int i;

	unsigned long addrs[3] = { IOBASE_SUN3_VMESCSI, 

				   IOBASE_SUN3_VMESCSI + 0x4000,

				   0 };

	unsigned long vecs[3] = { SUN3_VEC_VMESCSI0,

				  SUN3_VEC_VMESCSI1,

				  0 };

	/* check that this machine has an onboard 5380 */

	switch(idprom->id_machtype) {

	case SM_SUN3|SM_3_160:

	case SM_SUN3|SM_3_260:

		break;



	default:

		return 0;

	}



	if(called)

		return 0;



	tpnt->proc_name = "Sun3 5380 VME SCSI";



	/* setup variables */

	tpnt->can_queue =

		(setup_can_queue > 0) ? setup_can_queue : CAN_QUEUE;

	tpnt->cmd_per_lun =

		(setup_cmd_per_lun > 0) ? setup_cmd_per_lun : CMD_PER_LUN;

	tpnt->sg_tablesize = 

		(setup_sg_tablesize >= 0) ? setup_sg_tablesize : SG_TABLESIZE;

	

	if (setup_hostid >= 0)

		tpnt->this_id = setup_hostid;

	else {

		/* use 7 as default */

		tpnt->this_id = 7;

	}

	

	ioaddr = 0;

	for(i = 0; addrs[i] != 0; i++) {

		unsigned char x;

		

		ioaddr = (unsigned long)sun3_ioremap(addrs[i], PAGE_SIZE,

						     SUN3_PAGE_TYPE_VME16);

		irq = vecs[i];

		sun3_scsi_regp = (unsigned char *)ioaddr;

		

		dregs = (struct sun3_dma_regs *)(((unsigned char *)ioaddr) + 8);

		

		if(sun3_map_test((unsigned long)dregs, &x)) {

			unsigned short oldcsr;



			oldcsr = dregs->csr;

			dregs->csr = 0;

			udelay(SUN3_DMA_DELAY);

			if(dregs->csr == 0x1400)

				break;

			

			dregs->csr = oldcsr;

		}



		iounmap((void *)ioaddr);

		ioaddr = 0;

	}



	if(!ioaddr)

		return 0;

	

#ifdef SUPPORT_TAGS

	if (setup_use_tagged_queuing < 0)

		setup_use_tagged_queuing = USE_TAGGED_QUEUING;

#endif



	instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));

	if(instance == NULL)

		return 0;

		

	default_instance = instance;



        instance->io_port = (unsigned long) ioaddr;

	instance->irq = irq;



	NCR5380_init(instance, 0);



	instance->n_io_port = 32;



        ((struct NCR5380_hostdata *)instance->hostdata)->ctrl = 0;



	if (request_irq(instance->irq, scsi_sun3_intr,

			0, "Sun3SCSI-5380VME", instance)) {

#ifndef REAL_DMA

		printk("scsi%d: IRQ%d not free, interrupts disabled\n",

		       instance->host_no, instance->irq);

		instance->irq = SCSI_IRQ_NONE;

#else

		printk("scsi%d: IRQ%d not free, bailing out\n",

		       instance->host_no, instance->irq);

		return 0;

#endif

	}



	printk("scsi%d: Sun3 5380 VME at port %lX irq", instance->host_no, instance->io_port);

	if (instance->irq == SCSI_IRQ_NONE)

		printk ("s disabled");

	else

		printk (" %d", instance->irq);

	printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",

	       instance->can_queue, instance->cmd_per_lun,

	       SUN3SCSI_PUBLIC_RELEASE);

	printk("\nscsi%d:", instance->host_no);

	NCR5380_print_options(instance);

	printk("\n");



	dregs->csr = 0;

	udelay(SUN3_DMA_DELAY);

	dregs->csr = CSR_SCSI | CSR_FIFO | CSR_INTR;

	udelay(SUN3_DMA_DELAY);

	dregs->fifo_count = 0;

	dregs->fifo_count_hi = 0;

	dregs->dma_addr_hi = 0;

	dregs->dma_addr_lo = 0;

	dregs->dma_count_hi = 0;

	dregs->dma_count_lo = 0;



	dregs->ivect = VME_DATA24 | (instance->irq & 0xff);



	called = 1;



#ifdef RESET_BOOT

	sun3_scsi_reset_boot(instance);

#endif



	return 1;

}



int sun3scsi_release (struct Scsi_Host *shpnt)

{

	if (shpnt->irq != SCSI_IRQ_NONE)

		free_irq(shpnt->irq, shpnt);



	iounmap((void *)sun3_scsi_regp);



	NCR5380_exit(shpnt);

	return 0;

}



#ifdef RESET_BOOT

/*

 * Our 'bus reset on boot' function

 */



static void sun3_scsi_reset_boot(struct Scsi_Host *instance)

{

	unsigned long end;



	NCR5380_local_declare();

	NCR5380_setup(instance);

	

	/*

	 * Do a SCSI reset to clean up the bus during initialization. No

	 * messing with the queues, interrupts, or locks necessary here.

	 */



	printk( "Sun3 SCSI: resetting the SCSI bus..." );



	/* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */

//       	sun3_disable_irq( IRQ_SUN3_SCSI );



	/* get in phase */

	NCR5380_write( TARGET_COMMAND_REG,

		      PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) ));



	/* assert RST */

	NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST );



	/* The min. reset hold time is 25us, so 40us should be enough */

	udelay( 50 );



	/* reset RST and interrupt */

	NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE );

	NCR5380_read( RESET_PARITY_INTERRUPT_REG );



	for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); )

		barrier();



	/* switch on SCSI IRQ again */

//       	sun3_enable_irq( IRQ_SUN3_SCSI );



	printk( " done\n" );

}

#endif



static const char * sun3scsi_info (struct Scsi_Host *spnt) {

    return "";

}



// safe bits for the CSR

#define CSR_GOOD 0x060f



static irqreturn_t scsi_sun3_intr(int irq, void *dummy)

{

	unsigned short csr = dregs->csr;

	int handled = 0;



	dregs->csr &= ~CSR_DMA_ENABLE;





#ifdef SUN3_SCSI_DEBUG

	printk("scsi_intr csr %x\n", csr);

#endif



	if(csr & ~CSR_GOOD) {

		if(csr & CSR_DMA_BUSERR) {

			printk("scsi%d: bus error in dma\n", default_instance->host_no);

#ifdef SUN3_SCSI_DEBUG

			printk("scsi: residual %x count %x addr %p dmaaddr %x\n", 

			       dregs->fifo_count,

			       dregs->dma_count_lo | (dregs->dma_count_hi << 16),

			       sun3_dma_orig_addr,

			       dregs->dma_addr_lo | (dregs->dma_addr_hi << 16));

#endif

		}



		if(csr & CSR_DMA_CONFLICT) {

			printk("scsi%d: dma conflict\n", default_instance->host_no);

		}

		handled = 1;

	}



	if(csr & (CSR_SDB_INT | CSR_DMA_INT)) {

		NCR5380_intr(irq, dummy);

		handled = 1;

	}



	return IRQ_RETVAL(handled);

}



/*

 * Debug stuff - to be called on NMI, or sysrq key. Use at your own risk; 

 * reentering NCR5380_print_status seems to have ugly side effects

 */



/* this doesn't seem to get used at all -- sam */

#if 0

void sun3_sun3_debug (void)

{

	unsigned long flags;

	NCR5380_local_declare();



	if (default_instance) {

			local_irq_save(flags);

			NCR5380_print_status(default_instance);

			local_irq_restore(flags);

	}

}

#endif





/* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */

static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag)

{

	void *addr;



	if(sun3_dma_orig_addr != NULL)

		dvma_unmap(sun3_dma_orig_addr);



//	addr = sun3_dvma_page((unsigned long)data, (unsigned long)dmabuf);

	addr = (void *)dvma_map_vme((unsigned long) data, count);

		

	sun3_dma_orig_addr = addr;

	sun3_dma_orig_count = count;

	

#ifdef SUN3_SCSI_DEBUG

	printk("scsi: dma_setup addr %p count %x\n", addr, count);

#endif



//	dregs->fifo_count = 0;

#if 0	

	/* reset fifo */

	dregs->csr &= ~CSR_FIFO;

	dregs->csr |= CSR_FIFO;

#endif	

	/* set direction */

	if(write_flag)

		dregs->csr |= CSR_SEND;

	else

		dregs->csr &= ~CSR_SEND;

	

	/* reset fifo */

//	dregs->csr &= ~CSR_FIFO;

//	dregs->csr |= CSR_FIFO;



	dregs->csr |= CSR_PACK_ENABLE;



	dregs->dma_addr_hi = ((unsigned long)addr >> 16);

	dregs->dma_addr_lo = ((unsigned long)addr & 0xffff);

	

	dregs->dma_count_hi = 0;

	dregs->dma_count_lo = 0;

	dregs->fifo_count_hi = 0;

	dregs->fifo_count = 0;

		

#ifdef SUN3_SCSI_DEBUG

	printk("scsi: dma_setup done csr %x\n", dregs->csr);

#endif

       	return count;



}



static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance)

{

	return last_residual;

}



static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted,

						  struct scsi_cmnd *cmd,

						  int write_flag)

{

	if (cmd->request->cmd_type == REQ_TYPE_FS)

 		return wanted;

	else

		return 0;

}



static int sun3scsi_dma_start(unsigned long count, char *data)

{

	

	unsigned short csr;



	csr = dregs->csr;

#ifdef SUN3_SCSI_DEBUG

	printk("scsi: dma_start data %p count %x csr %x fifo %x\n", data, count, csr, dregs->fifo_count);

#endif

	

	dregs->dma_count_hi = (sun3_dma_orig_count >> 16);

	dregs->dma_count_lo = (sun3_dma_orig_count & 0xffff);



	dregs->fifo_count_hi = (sun3_dma_orig_count >> 16);

	dregs->fifo_count = (sun3_dma_orig_count & 0xffff);



//	if(!(csr & CSR_DMA_ENABLE))

//		dregs->csr |= CSR_DMA_ENABLE;



	return 0;

}



/* clean up after our dma is done */

static int sun3scsi_dma_finish(int write_flag)

{

	unsigned short fifo;

	int ret = 0;

	

	sun3_dma_active = 0;



	dregs->csr &= ~CSR_DMA_ENABLE;

	

	fifo = dregs->fifo_count;

	if(write_flag) {

		if((fifo > 0) && (fifo < sun3_dma_orig_count))

			fifo++;

	}



	last_residual = fifo;

#ifdef SUN3_SCSI_DEBUG

	printk("scsi: residual %x total %x\n", fifo, sun3_dma_orig_count);

#endif

	/* empty bytes from the fifo which didn't make it */

	if((!write_flag) && (dregs->csr & CSR_LEFT)) {

		unsigned char *vaddr;



#ifdef SUN3_SCSI_DEBUG

		printk("scsi: got left over bytes\n");

#endif



		vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr);

		

		vaddr += (sun3_dma_orig_count - fifo);

		vaddr--;

		

		switch(dregs->csr & CSR_LEFT) {

		case CSR_LEFT_3:

			*vaddr = (dregs->bpack_lo & 0xff00) >> 8;

			vaddr--;

			

		case CSR_LEFT_2:

			*vaddr = (dregs->bpack_hi & 0x00ff);

			vaddr--;

			

		case CSR_LEFT_1:

			*vaddr = (dregs->bpack_hi & 0xff00) >> 8;

			break;

		}

		

		

	}



	dvma_unmap(sun3_dma_orig_addr);

	sun3_dma_orig_addr = NULL;



	dregs->dma_addr_hi = 0;

	dregs->dma_addr_lo = 0;

	dregs->dma_count_hi = 0;

	dregs->dma_count_lo = 0;



	dregs->fifo_count = 0;

	dregs->fifo_count_hi = 0;



	dregs->csr &= ~CSR_SEND;

	

//	dregs->csr |= CSR_DMA_ENABLE;

	

#if 0

	/* reset fifo */

	dregs->csr &= ~CSR_FIFO;

	dregs->csr |= CSR_FIFO;

#endif	

	sun3_dma_setup_done = NULL;



	return ret;



}



#include "sun3_NCR5380.c"



static struct scsi_host_template driver_template = {

	.name			= SUN3_SCSI_NAME,

	.detect			= sun3scsi_detect,

	.release		= sun3scsi_release,

	.info			= sun3scsi_info,

	.queuecommand		= sun3scsi_queue_command,

	.eh_abort_handler      	= sun3scsi_abort,

	.eh_bus_reset_handler  	= sun3scsi_bus_reset,

	.can_queue		= CAN_QUEUE,

	.this_id		= 7,

	.sg_tablesize		= SG_TABLESIZE,

	.cmd_per_lun		= CMD_PER_LUN,

	.use_clustering		= DISABLE_CLUSTERING

};





#include "scsi_module.c"



MODULE_LICENSE("GPL");
 
#include "sun3_scsi.c"

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