[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / sun3_scsi_vme.c

 /*
 * 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

#define NDEBUG 0

#define NDEBUG_ABORT		0x00100000
#define NDEBUG_TAGS		0x00200000
#define NDEBUG_MERGING		0x00400000

#include "scsi.h"
#include "initio.h"
#include <scsi/scsi_host.h>
#include "sun3_scsi.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");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Sun3 SCSI stuff by Erik Verbruggen (erik@bigmama.xtdnet.nl)
	3	*
	4	* Sun3 DMA routines added by Sam Creasey (sammy@sammy.net)
	5	*
	6	* VME support added by Sam Creasey
	7	*
	8	* Adapted from sun3_scsi.c -- see there for other headers
	9	*
	10	* TODO: modify this driver to support multiple Sun3 SCSI VME boards
	11	*
	12	*/
	13
	14	#define AUTOSENSE
	15
	16	#include <linux/types.h>
	17	#include <linux/stddef.h>
	18	#include <linux/ctype.h>
	19	#include <linux/delay.h>
	20
	21	#include <linux/module.h>
	22	#include <linux/signal.h>
1da177e4 LT	23	#include <linux/ioport.h>
	24	#include <linux/init.h>
	25	#include <linux/blkdev.h>
	26
	27	#include <asm/io.h>
1da177e4 LT	28
	29	#include <asm/sun3ints.h>
	30	#include <asm/dvma.h>
	31	#include <asm/idprom.h>
	32	#include <asm/machines.h>
	33
	34	#define SUN3_SCSI_VME
	35
	36	#undef SUN3_SCSI_DEBUG
	37
	38	/* dma on! */
	39	#define REAL_DMA
	40
2ba51ea2 GU	41	#define NDEBUG 0
	42
	43	#define NDEBUG_ABORT 0x00100000
	44	#define NDEBUG_TAGS 0x00200000
	45	#define NDEBUG_MERGING 0x00400000
	46
1da177e4	47	#include "scsi.h"
c39e7eee	48	#include "initio.h"
1da177e4 LT	49	#include <scsi/scsi_host.h>
1da177e4 LT	50	#include "sun3_scsi.h"
1da177e4 LT	51
	52	extern int sun3_map_test(unsigned long, char *);
	53
	54	#define USE_WRAPPER
	55	/#define RESET_BOOT /
	56	#define DRIVER_SETUP
	57
1da177e4 LT	58	/*
	59	* BUG can be used to trigger a strange code-size related hang on 2.1 kernels
	60	*/
	61	#ifdef BUG
	62	#undef RESET_BOOT
	63	#undef DRIVER_SETUP
	64	#endif
	65
	66	/* #define SUPPORT_TAGS */
	67
	68	//#define ENABLE_IRQ() enable_irq( SUN3_VEC_VMESCSI0 );
	69	#define ENABLE_IRQ()
	70
	71
7d12e780	72	static irqreturn_t scsi_sun3_intr(int irq, void *dummy);
1da177e4 LT	73	static inline unsigned char sun3scsi_read(int reg);
	74	static inline void sun3scsi_write(int reg, int value);
	75
	76	static int setup_can_queue = -1;
	77	module_param(setup_can_queue, int, 0);
	78	static int setup_cmd_per_lun = -1;
	79	module_param(setup_cmd_per_lun, int, 0);
	80	static int setup_sg_tablesize = -1;
	81	module_param(setup_sg_tablesize, int, 0);
	82	#ifdef SUPPORT_TAGS
	83	static int setup_use_tagged_queuing = -1;
	84	module_param(setup_use_tagged_queuing, int, 0);
	85	#endif
	86	static int setup_hostid = -1;
	87	module_param(setup_hostid, int, 0);
	88
811c9366	89	static struct scsi_cmnd *sun3_dma_setup_done = NULL;
1da177e4 LT	90
	91	#define AFTER_RESET_DELAY (HZ/2)
	92
	93	/* ms to wait after hitting dma regs */
	94	#define SUN3_DMA_DELAY 10
	95
	96	/* dvma buffer to allocate -- 32k should hopefully be more than sufficient */
	97	#define SUN3_DVMA_BUFSIZE 0xe000
	98
	99	/* minimum number of bytes to do dma on */
	100	#define SUN3_DMA_MINSIZE 128
	101
	102	static volatile unsigned char *sun3_scsi_regp;
	103	static volatile struct sun3_dma_regs *dregs;
	104	#ifdef OLDDMA
	105	static unsigned char dmabuf = NULL; / dma memory buffer */
	106	#endif
	107	static unsigned char *sun3_dma_orig_addr = NULL;
	108	static unsigned long sun3_dma_orig_count = 0;
	109	static int sun3_dma_active = 0;
	110	static unsigned long last_residual = 0;
	111
	112	/*
	113	* NCR 5380 register access functions
	114	*/
	115
	116	static inline unsigned char sun3scsi_read(int reg)
	117	{
	118	return( sun3_scsi_regp[reg] );
	119	}
	120
	121	static inline void sun3scsi_write(int reg, int value)
	122	{
	123	sun3_scsi_regp[reg] = value;
	124	}
	125
	126	/*
	127	* XXX: status debug
	128	*/
	129	static struct Scsi_Host *default_instance;
	130
	131	/*
d0be4a7d	132	* Function : int sun3scsi_detect(struct scsi_host_template * tpnt)
1da177e4 LT	133	*
	134	* Purpose : initializes mac NCR5380 driver based on the
	135	* command line / compile time port and irq definitions.
	136	*
	137	* Inputs : tpnt - template for this SCSI adapter.
	138	*
	139	* Returns : 1 if a host adapter was found, 0 if not.
	140	*
	141	*/
	142
d559c49e	143	static int __init sun3scsi_detect(struct scsi_host_template * tpnt)
1da177e4 LT	144	{
	145	unsigned long ioaddr, irq = 0;
	146	static int called = 0;
	147	struct Scsi_Host *instance;
	148	int i;
	149	unsigned long addrs[3] = { IOBASE_SUN3_VMESCSI,
	150	IOBASE_SUN3_VMESCSI + 0x4000,
	151	0 };
	152	unsigned long vecs[3] = { SUN3_VEC_VMESCSI0,
	153	SUN3_VEC_VMESCSI1,
	154	0 };
	155	/* check that this machine has an onboard 5380 */
	156	switch(idprom->id_machtype) {
	157	case SM_SUN3\|SM_3_160:
	158	case SM_SUN3\|SM_3_260:
	159	break;
	160
	161	default:
	162	return 0;
	163	}
	164
	165	if(called)
	166	return 0;
	167
	168	tpnt->proc_name = "Sun3 5380 VME SCSI";
	169
	170	/* setup variables */
	171	tpnt->can_queue =
	172	(setup_can_queue > 0) ? setup_can_queue : CAN_QUEUE;
	173	tpnt->cmd_per_lun =
	174	(setup_cmd_per_lun > 0) ? setup_cmd_per_lun : CMD_PER_LUN;
	175	tpnt->sg_tablesize =
	176	(setup_sg_tablesize >= 0) ? setup_sg_tablesize : SG_TABLESIZE;
	177
	178	if (setup_hostid >= 0)
	179	tpnt->this_id = setup_hostid;
	180	else {
	181	/* use 7 as default */
	182	tpnt->this_id = 7;
	183	}
	184
	185	ioaddr = 0;
	186	for(i = 0; addrs[i] != 0; i++) {
	187	unsigned char x;
	188
	189	ioaddr = (unsigned long)sun3_ioremap(addrs[i], PAGE_SIZE,
	190	SUN3_PAGE_TYPE_VME16);
	191	irq = vecs[i];
	192	sun3_scsi_regp = (unsigned char *)ioaddr;
	193
	194	dregs = (struct sun3_dma_regs )(((unsigned char )ioaddr) + 8);
	195
	196	if(sun3_map_test((unsigned long)dregs, &x)) {
	197	unsigned short oldcsr;
	198
	199	oldcsr = dregs->csr;
	200	dregs->csr = 0;
	201	udelay(SUN3_DMA_DELAY);
	202	if(dregs->csr == 0x1400)
	203	break;
	204
	205	dregs->csr = oldcsr;
	206	}
	207
208	iounmap((void *)ioaddr);
209	ioaddr = 0;
210	}
211
212	if(!ioaddr)
213	return 0;
214
215	#ifdef SUPPORT_TAGS
216	if (setup_use_tagged_queuing < 0)
217	setup_use_tagged_queuing = USE_TAGGED_QUEUING;
218	#endif
219
220	instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
221	if(instance == NULL)
222	return 0;
223
224	default_instance = instance;
225
226	instance->io_port = (unsigned long) ioaddr;
227	instance->irq = irq;
228
229	NCR5380_init(instance, 0);
230
231	instance->n_io_port = 32;
232
233	((struct NCR5380_hostdata *)instance->hostdata)->ctrl = 0;
234
235	if (request_irq(instance->irq, scsi_sun3_intr,
1e641664	236	0, "Sun3SCSI-5380VME", instance)) {
1da177e4 LT	237	#ifndef REAL_DMA
	238	printk("scsi%d: IRQ%d not free, interrupts disabled\n",
	239	instance->host_no, instance->irq);
	240	instance->irq = SCSI_IRQ_NONE;
	241	#else
	242	printk("scsi%d: IRQ%d not free, bailing out\n",
	243	instance->host_no, instance->irq);
	244	return 0;
	245	#endif
	246	}
	247
	248	printk("scsi%d: Sun3 5380 VME at port %lX irq", instance->host_no, instance->io_port);
	249	if (instance->irq == SCSI_IRQ_NONE)
	250	printk ("s disabled");
	251	else
	252	printk (" %d", instance->irq);
	253	printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
	254	instance->can_queue, instance->cmd_per_lun,
	255	SUN3SCSI_PUBLIC_RELEASE);
	256	printk("\nscsi%d:", instance->host_no);
	257	NCR5380_print_options(instance);
	258	printk("\n");
	259
	260	dregs->csr = 0;
	261	udelay(SUN3_DMA_DELAY);
	262	dregs->csr = CSR_SCSI \| CSR_FIFO \| CSR_INTR;
	263	udelay(SUN3_DMA_DELAY);
	264	dregs->fifo_count = 0;
	265	dregs->fifo_count_hi = 0;
	266	dregs->dma_addr_hi = 0;
	267	dregs->dma_addr_lo = 0;
	268	dregs->dma_count_hi = 0;
	269	dregs->dma_count_lo = 0;
	270
	271	dregs->ivect = VME_DATA24 \| (instance->irq & 0xff);
	272
	273	called = 1;
	274
	275	#ifdef RESET_BOOT
	276	sun3_scsi_reset_boot(instance);
	277	#endif
	278
	279	return 1;
	280	}
	281
	282	int sun3scsi_release (struct Scsi_Host *shpnt)
	283	{
	284	if (shpnt->irq != SCSI_IRQ_NONE)
1e641664	285	free_irq(shpnt->irq, shpnt);
1da177e4 LT	286
	287	iounmap((void *)sun3_scsi_regp);
	288
19b6c51c	289	NCR5380_exit(shpnt);
1da177e4 LT	290	return 0;
	291	}
	292
	293	#ifdef RESET_BOOT
	294	/*
	295	* Our 'bus reset on boot' function
	296	*/
	297
	298	static void sun3_scsi_reset_boot(struct Scsi_Host *instance)
	299	{
	300	unsigned long end;
	301
	302	NCR5380_local_declare();
	303	NCR5380_setup(instance);
	304
	305	/*
	306	* Do a SCSI reset to clean up the bus during initialization. No
	307	* messing with the queues, interrupts, or locks necessary here.
	308	*/
	309
	310	printk( "Sun3 SCSI: resetting the SCSI bus..." );
	311
	312	/* switch off SCSI IRQ - catch an interrupt without IRQ bit set else */
	313	// sun3_disable_irq( IRQ_SUN3_SCSI );
	314
	315	/* get in phase */
	316	NCR5380_write( TARGET_COMMAND_REG,
	317	PHASE_SR_TO_TCR( NCR5380_read(STATUS_REG) ));
	318
	319	/* assert RST */
	320	NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE \| ICR_ASSERT_RST );
	321
	322	/* The min. reset hold time is 25us, so 40us should be enough */
	323	udelay( 50 );
	324
	325	/* reset RST and interrupt */
	326	NCR5380_write( INITIATOR_COMMAND_REG, ICR_BASE );
	327	NCR5380_read( RESET_PARITY_INTERRUPT_REG );
	328
	329	for( end = jiffies + AFTER_RESET_DELAY; time_before(jiffies, end); )
	330	barrier();
	331
	332	/* switch on SCSI IRQ again */
	333	// sun3_enable_irq( IRQ_SUN3_SCSI );
	334
	335	printk( " done\n" );
	336	}
	337	#endif
	338
	339	static const char * sun3scsi_info (struct Scsi_Host *spnt) {
	340	return "";
	341	}
	342
	343	// safe bits for the CSR
	344	#define CSR_GOOD 0x060f
	345
7d12e780	346	static irqreturn_t scsi_sun3_intr(int irq, void *dummy)
1da177e4 LT	347	{
	348	unsigned short csr = dregs->csr;
	349	int handled = 0;
	350
	351	dregs->csr &= ~CSR_DMA_ENABLE;
	352
	353
	354	#ifdef SUN3_SCSI_DEBUG
	355	printk("scsi_intr csr %x\n", csr);
	356	#endif
	357
	358	if(csr & ~CSR_GOOD) {
	359	if(csr & CSR_DMA_BUSERR) {
	360	printk("scsi%d: bus error in dma\n", default_instance->host_no);
	361	#ifdef SUN3_SCSI_DEBUG
	362	printk("scsi: residual %x count %x addr %p dmaaddr %x\n",
	363	dregs->fifo_count,
	364	dregs->dma_count_lo \| (dregs->dma_count_hi << 16),
	365	sun3_dma_orig_addr,
	366	dregs->dma_addr_lo \| (dregs->dma_addr_hi << 16));
	367	#endif
	368	}
	369
	370	if(csr & CSR_DMA_CONFLICT) {
	371	printk("scsi%d: dma conflict\n", default_instance->host_no);
	372	}
	373	handled = 1;
	374	}
	375
	376	if(csr & (CSR_SDB_INT \| CSR_DMA_INT)) {
7d12e780	377	NCR5380_intr(irq, dummy);
1da177e4 LT	378	handled = 1;
	379	}
	380
	381	return IRQ_RETVAL(handled);
	382	}
	383
	384	/*
	385	* Debug stuff - to be called on NMI, or sysrq key. Use at your own risk;
	386	* reentering NCR5380_print_status seems to have ugly side effects
	387	*/
	388
	389	/* this doesn't seem to get used at all -- sam */
	390	#if 0
	391	void sun3_sun3_debug (void)
	392	{
	393	unsigned long flags;
	394	NCR5380_local_declare();
	395
	396	if (default_instance) {
	397	local_irq_save(flags);
	398	NCR5380_print_status(default_instance);
	399	local_irq_restore(flags);
	400	}
	401	}
	402	#endif
	403
	404
	405	/* sun3scsi_dma_setup() -- initialize the dma controller for a read/write */
	406	static unsigned long sun3scsi_dma_setup(void *data, unsigned long count, int write_flag)
	407	{
	408	void *addr;
	409
	410	if(sun3_dma_orig_addr != NULL)
	411	dvma_unmap(sun3_dma_orig_addr);
	412
	413	// addr = sun3_dvma_page((unsigned long)data, (unsigned long)dmabuf);
	414	addr = (void *)dvma_map_vme((unsigned long) data, count);
	415
	416	sun3_dma_orig_addr = addr;
	417	sun3_dma_orig_count = count;
	418
	419	#ifdef SUN3_SCSI_DEBUG
	420	printk("scsi: dma_setup addr %p count %x\n", addr, count);
	421	#endif
	422
	423	// dregs->fifo_count = 0;
	424	#if 0
	425	/* reset fifo */
	426	dregs->csr &= ~CSR_FIFO;
	427	dregs->csr \|= CSR_FIFO;
	428	#endif
	429	/* set direction */
	430	if(write_flag)
	431	dregs->csr \|= CSR_SEND;
	432	else
	433	dregs->csr &= ~CSR_SEND;
	434
	435	/* reset fifo */
	436	// dregs->csr &= ~CSR_FIFO;
	437	// dregs->csr \|= CSR_FIFO;
	438
	439	dregs->csr \|= CSR_PACK_ENABLE;
	440
	441	dregs->dma_addr_hi = ((unsigned long)addr >> 16);
442	dregs->dma_addr_lo = ((unsigned long)addr & 0xffff);
443
444	dregs->dma_count_hi = 0;
445	dregs->dma_count_lo = 0;
446	dregs->fifo_count_hi = 0;
447	dregs->fifo_count = 0;
448
449	#ifdef SUN3_SCSI_DEBUG
450	printk("scsi: dma_setup done csr %x\n", dregs->csr);
451	#endif
452	return count;
453
454	}
455
456	static inline unsigned long sun3scsi_dma_residual(struct Scsi_Host *instance)
457	{
458	return last_residual;
459	}
460
811c9366 HK	461	static inline unsigned long sun3scsi_dma_xfer_len(unsigned long wanted,
	462	struct scsi_cmnd *cmd,
	463	int write_flag)
1da177e4	464	{
33659ebb	465	if (cmd->request->cmd_type == REQ_TYPE_FS)
1da177e4 LT	466	return wanted;
	467	else
	468	return 0;
	469	}
	470
	471	static int sun3scsi_dma_start(unsigned long count, char *data)
	472	{
	473
	474	unsigned short csr;
	475
	476	csr = dregs->csr;
	477	#ifdef SUN3_SCSI_DEBUG
	478	printk("scsi: dma_start data %p count %x csr %x fifo %x\n", data, count, csr, dregs->fifo_count);
	479	#endif
	480
	481	dregs->dma_count_hi = (sun3_dma_orig_count >> 16);
	482	dregs->dma_count_lo = (sun3_dma_orig_count & 0xffff);
	483
	484	dregs->fifo_count_hi = (sun3_dma_orig_count >> 16);
	485	dregs->fifo_count = (sun3_dma_orig_count & 0xffff);
	486
	487	// if(!(csr & CSR_DMA_ENABLE))
	488	// dregs->csr \|= CSR_DMA_ENABLE;
	489
	490	return 0;
	491	}
	492
	493	/* clean up after our dma is done */
	494	static int sun3scsi_dma_finish(int write_flag)
	495	{
	496	unsigned short fifo;
	497	int ret = 0;
	498
	499	sun3_dma_active = 0;
	500
	501	dregs->csr &= ~CSR_DMA_ENABLE;
	502
	503	fifo = dregs->fifo_count;
	504	if(write_flag) {
	505	if((fifo > 0) && (fifo < sun3_dma_orig_count))
	506	fifo++;
	507	}
	508
	509	last_residual = fifo;
	510	#ifdef SUN3_SCSI_DEBUG
	511	printk("scsi: residual %x total %x\n", fifo, sun3_dma_orig_count);
	512	#endif
	513	/* empty bytes from the fifo which didn't make it */
	514	if((!write_flag) && (dregs->csr & CSR_LEFT)) {
	515	unsigned char *vaddr;
	516
	517	#ifdef SUN3_SCSI_DEBUG
	518	printk("scsi: got left over bytes\n");
	519	#endif
	520
	521	vaddr = (unsigned char *)dvma_vmetov(sun3_dma_orig_addr);
	522
	523	vaddr += (sun3_dma_orig_count - fifo);
	524	vaddr--;
	525
	526	switch(dregs->csr & CSR_LEFT) {
	527	case CSR_LEFT_3:
	528	*vaddr = (dregs->bpack_lo & 0xff00) >> 8;
	529	vaddr--;
530
531	case CSR_LEFT_2:
532	*vaddr = (dregs->bpack_hi & 0x00ff);
533	vaddr--;
534
535	case CSR_LEFT_1:
536	*vaddr = (dregs->bpack_hi & 0xff00) >> 8;
537	break;
538	}
539
540
541	}
542
543	dvma_unmap(sun3_dma_orig_addr);
544	sun3_dma_orig_addr = NULL;
545
546	dregs->dma_addr_hi = 0;
547	dregs->dma_addr_lo = 0;
548	dregs->dma_count_hi = 0;
549	dregs->dma_count_lo = 0;
550
551	dregs->fifo_count = 0;
552	dregs->fifo_count_hi = 0;
553
554	dregs->csr &= ~CSR_SEND;
555
556	// dregs->csr \|= CSR_DMA_ENABLE;
557
558	#if 0
559	/* reset fifo */
560	dregs->csr &= ~CSR_FIFO;
561	dregs->csr \|= CSR_FIFO;
562	#endif
563	sun3_dma_setup_done = NULL;
564
565	return ret;
566
567	}
568
569	#include "sun3_NCR5380.c"
570
d0be4a7d	571	static struct scsi_host_template driver_template = {
1da177e4 LT	572	.name = SUN3_SCSI_NAME,
	573	.detect = sun3scsi_detect,
	574	.release = sun3scsi_release,
	575	.info = sun3scsi_info,
	576	.queuecommand = sun3scsi_queue_command,
	577	.eh_abort_handler = sun3scsi_abort,
	578	.eh_bus_reset_handler = sun3scsi_bus_reset,
	579	.can_queue = CAN_QUEUE,
	580	.this_id = 7,
	581	.sg_tablesize = SG_TABLESIZE,
	582	.cmd_per_lun = CMD_PER_LUN,
	583	.use_clustering = DISABLE_CLUSTERING
	584	};
	585
	586
	587	#include "scsi_module.c"
	588
582df153	589	MODULE_LICENSE("GPL");