g_ncr5380.c

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/*
 * Generic Generic NCR5380 driver
 *	
 * Copyright 1993, Drew Eckhardt
 *	Visionary Computing
 *	(Unix and Linux consulting and custom programming)
 *	[e-mail]
 *      [phone]
 *
 * NCR53C400 extensions (c) 1994,1995,1996, Kevin Lentin
 *    [e-mail]
 *
 * NCR53C400A extensions (c) 1996, Ingmar Baumgart
 *    [e-mail]
 *
 * DTC3181E extensions (c) 1997, Ronald van Cuijlenborg
 * [e-mail] or [e-mail]
 *
 * Added ISAPNP support for DTC436 adapters,
 * Thomas Sailer, [e-mail]
 *
 * ALPHA RELEASE 1. 
 *
 * For more information, please consult 
 *
 * NCR 5380 Family
 * SCSI Protocol Controller
 * Databook
 *
 * NCR Microelectronics
 * 1635 Aeroplaza Drive
 * Colorado Springs, CO 80916
 * 1+ [phone]
 * 1+ [phone]
 */

/* 
 * TODO : flesh out DMA support, find some one actually using this (I have
 * 	a memory mapped Trantor board that works fine)
 */

/*
 * Options :
 *
 * PARITY - enable parity checking.  Not supported.
 *
 * SCSI2 - enable support for SCSI-II tagged queueing.  Untested.
 *
 * USLEEP - enable support for devices that don't disconnect.  Untested.
 *
 * The card is detected and initialized in one of several ways : 
 * 1.  With command line overrides - NCR5380=port,irq may be 
 *     used on the LILO command line to override the defaults.
 *
 * 2.  With the GENERIC_NCR5380_OVERRIDE compile time define.  This is 
 *     specified as an array of address, irq, dma, board tuples.  Ie, for
 *     one board at 0x350, IRQ5, no dma, I could say  
 *     -DGENERIC_NCR5380_OVERRIDE={{0xcc000, 5, DMA_NONE, BOARD_NCR5380}}
 * 
 * -1 should be specified for no or DMA interrupt, -2 to autoprobe for an 
 * 	IRQ line if overridden on the command line.
 *
 * 3.  When included as a module, with arguments passed on the command line:
 *         ncr_irq=xx	the interrupt
 *         ncr_addr=xx  the port or base address (for port or memory
 *              	mapped, resp.)
 *         ncr_dma=xx	the DMA
 *         ncr_5380=1	to set up for a NCR5380 board
 *         ncr_53c400=1	to set up for a NCR53C400 board
 *     e.g.
 *     modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_5380=1
 *       for a port mapped NCR5380 board or
 *     modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1
 *       for a memory mapped NCR53C400 board with interrupts disabled.
 * 
 * 255 should be specified for no or DMA interrupt, 254 to autoprobe for an 
 * 	IRQ line if overridden on the command line.
 *     
 */

/*
 * $Log: generic_NCR5380.c,v $
 */

/* settings for DTC3181E card with only Mustek scanner attached */
#define USLEEP
#define USLEEP_POLL	1
#define USLEEP_SLEEP	20
#define USLEEP_WAITLONG	500

#define AUTOPROBE_IRQ
#define AUTOSENSE

#include <linux/config.h>

#ifdef CONFIG_SCSI_GENERIC_NCR53C400
#define NCR53C400_PSEUDO_DMA 1
#define PSEUDO_DMA
#define NCR53C400
#define NCR5380_STATS
#undef NCR5380_STAT_LIMIT
#endif
#if defined(CONFIG_SCSI_G_NCR5380_PORT) && defined(CONFIG_SCSI_G_NCR5380_MEM)
#error You can not configure the Generic NCR 5380 SCSI Driver for memory mapped I/O and port mapped I/O at the same time (yet)
#endif
#if !defined(CONFIG_SCSI_G_NCR5380_PORT) && !defined(CONFIG_SCSI_G_NCR5380_MEM)
#error You must configure the Generic NCR 5380 SCSI Driver for one of memory mapped I/O and port mapped I/O.
#endif

#include <asm/system.h>
#include <asm/io.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/blk.h>
#include "scsi.h"
#include "hosts.h"
#include "g_NCR5380.h"
#include "NCR5380.h"
#include "constants.h"
#include "sd.h"
#include <linux/stat.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/isapnp.h>

#define NCR_NOT_SET 0
static int ncr_irq = NCR_NOT_SET;
static int ncr_dma = NCR_NOT_SET;
static int ncr_addr = NCR_NOT_SET;
static int ncr_5380 = NCR_NOT_SET;
static int ncr_53c400 = NCR_NOT_SET;
static int ncr_53c400a = NCR_NOT_SET;
static int dtc_3181e = NCR_NOT_SET;

static struct override {
	NCR5380_implementation_fields;
	int irq;
	int dma;
	int board;		/* Use NCR53c400, Ricoh, etc. extensions ? */
} overrides
#ifdef GENERIC_NCR5380_OVERRIDE
[] __initdata = GENERIC_NCR5380_OVERRIDE;
#else
[1] __initdata = { { 0,},};
#endif

#define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))

/**
 *	internal_setup		-	handle lilo command string override
 *	@board:	BOARD_* identifier for the board
 *	@str: unused
 *	@ints: numeric parameters
 *
 * 	Do LILO command line initialization of the overrides array. Display
 *	errors when needed
 *
 *	Locks: none
 */

static void __init internal_setup(int board, char *str, int *ints)
{
	static int commandline_current = 0;
	switch (board) {
	case BOARD_NCR5380:
		if (ints[0] != 2 && ints[0] != 3) {
			printk(KERN_ERR "generic_NCR5380_setup : usage ncr5380=" STRVAL(NCR5380_map_name) ",irq,dma\n");
			return;
		}
		break;
	case BOARD_NCR53C400:
		if (ints[0] != 2) {
			printk(KERN_ERR "generic_NCR53C400_setup : usage ncr53c400=" STRVAL(NCR5380_map_name) ",irq\n");
			return;
		}
		break;
	case BOARD_NCR53C400A:
		if (ints[0] != 2) {
			printk(KERN_ERR "generic_NCR53C400A_setup : usage ncr53c400a=" STRVAL(NCR5380_map_name) ",irq\n");
			return;
		}
		break;
	case BOARD_DTC3181E:
		if (ints[0] != 2) {
			printk("generic_DTC3181E_setup : usage dtc3181e=" STRVAL(NCR5380_map_name) ",irq\n");
			return;
		}
		break;
	}

	if (commandline_current < NO_OVERRIDES) {
		overrides[commandline_current].NCR5380_map_name = (NCR5380_map_type) ints[1];
		overrides[commandline_current].irq = ints[2];
		if (ints[0] == 3)
			overrides[commandline_current].dma = ints[3];
		else
			overrides[commandline_current].dma = DMA_NONE;
		overrides[commandline_current].board = board;
		++commandline_current;
	}
}

/**
 * 	do_NCR53C80_setup		-	set up entry point
 *	@str: unused
 *
 *	Setup function invoked at boot to parse the ncr5380= command
 *	line.
 */

static int __init do_NCR5380_setup(char *str)
{
	int ints[10];

	get_options(str, sizeof(ints) / sizeof(int), ints);
	internal_setup(BOARD_NCR5380, str, ints);
	return 1;
}

/**
 * 	do_NCR53C400_setup		-	set up entry point
 *	@str: unused
 *	@ints: integer parameters from kernel setup code 
 *
 *	Setup function invoked at boot to parse the ncr53c400= command
 *	line.
 */

static int __init do_NCR53C400_setup(char *str)
{
	int ints[10];

	get_options(str, sizeof(ints) / sizeof(int), ints);
	internal_setup(BOARD_NCR53C400, str, ints);
	return 1;
}

/**
 * 	do_NCR53C400A_setup	-	set up entry point
 *	@str: unused
 *	@ints: integer parameters from kernel setup code 
 *
 *	Setup function invoked at boot to parse the ncr53c400a= command
 *	line.
 */

static int __init do_NCR53C400A_setup(char *str)
{
	int ints[10];

	get_options(str, sizeof(ints) / sizeof(int), ints);
	internal_setup(BOARD_NCR53C400A, str, ints);
	return 1;
}

/**
 * 	do_DTC3181E_setup	-	set up entry point
 *	@str: unused
 *	@ints: integer parameters from kernel setup code 
 *
 *	Setup function invoked at boot to parse the dtc3181e= command
 *	line.
 */

static int __init do_DTC3181E_setup(char *str)
{
	int ints[10];

	get_options(str, sizeof(ints) / sizeof(int), ints);
	internal_setup(BOARD_DTC3181E, str, ints);
	return 1;
}

/**
 * 	generic_NCR5380_detect	-	look for NCR5380 controllers
 *	@tpnt: the scsi template
 *
 *	Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
 *	and DTC436(ISAPnP) controllers. If overrides have been set we use
 *	them.
 *
 *	The caller supplied NCR5380_init function is invoked from here, before
 *	the interrupt line is taken.
 *
 *	Locks: none
 */

int __init generic_NCR5380_detect(Scsi_Host_Template * tpnt)
{
	static int current_override = 0;
	int count, i;
	unsigned int *ports;
	static unsigned int __initdata ncr_53c400a_ports[] = {
		0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
	};
	static unsigned int __initdata dtc_3181e_ports[] = {
		0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
	};
	int flags = 0;
	struct Scsi_Host *instance;

	if (ncr_irq != NCR_NOT_SET)
		overrides[0].irq = ncr_irq;
	if (ncr_dma != NCR_NOT_SET)
		overrides[0].dma = ncr_dma;
	if (ncr_addr != NCR_NOT_SET)
		overrides[0].NCR5380_map_name = (NCR5380_map_type) ncr_addr;
	if (ncr_5380 != NCR_NOT_SET)
		overrides[0].board = BOARD_NCR5380;
	else if (ncr_53c400 != NCR_NOT_SET)
		overrides[0].board = BOARD_NCR53C400;
	else if (ncr_53c400a != NCR_NOT_SET)
		overrides[0].board = BOARD_NCR53C400A;
	else if (dtc_3181e != NCR_NOT_SET)
		overrides[0].board = BOARD_DTC3181E;

	if (!current_override && isapnp_present()) {
		struct pci_dev *dev = NULL;
		count = 0;
		while ((dev = isapnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
			if (count >= NO_OVERRIDES)
				break;
			if (!dev->active && dev->prepare(dev) < 0) {
				printk(KERN_ERR "dtc436e probe: prepare failed\n");
				continue;
			}
			if (!(dev->resource[0].flags & IORESOURCE_IO))
				continue;
			if (!dev->active && dev->activate(dev) < 0) {
				printk(KERN_ERR "dtc436e probe: activate failed\n");
				continue;
			}
			if (dev->irq_resource[0].flags & IORESOURCE_IRQ)
				overrides[count].irq = dev->irq_resource[0].start;
			else
				overrides[count].irq = IRQ_NONE;
			if (dev->dma_resource[0].flags & IORESOURCE_DMA)
				overrides[count].dma = dev->dma_resource[0].start;
			else
				overrides[count].dma = DMA_NONE;
			overrides[count].NCR5380_map_name = (NCR5380_map_type) dev->resource[0].start;
			overrides[count].board = BOARD_DTC3181E;
			count++;
		}
	}

	tpnt->proc_name = "g_NCR5380";

	for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
		if (!(overrides[current_override].NCR5380_map_name))
			continue;

		ports = 0;
		switch (overrides[current_override].board) {
		case BOARD_NCR5380:
			flags = FLAG_NO_PSEUDO_DMA;
			break;
		case BOARD_NCR53C400:
			flags = FLAG_NCR53C400;
			break;
		case BOARD_NCR53C400A:
			flags = FLAG_NO_PSEUDO_DMA;
			ports = ncr_53c400a_ports;
			break;
		case BOARD_DTC3181E:
			flags = FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E;
			ports = dtc_3181e_ports;
			break;
		}

#ifdef CONFIG_SCSI_G_NCR5380_PORT
		if (ports) {
			/* wakeup sequence for the NCR53C400A and DTC3181E */

			/* Disable the adapter and look for a free io port */
			outb(0x59, 0x779);
			outb(0xb9, 0x379);
			outb(0xc5, 0x379);
			outb(0xae, 0x379);
			outb(0xa6, 0x379);
			outb(0x00, 0x379);

			if (overrides[current_override].NCR5380_map_name != PORT_AUTO)
				for (i = 0; ports[i]; i++) {
					if (overrides[current_override].NCR5380_map_name == ports[i])
						break;
			} else
				for (i = 0; ports[i]; i++) {
					if ((!check_region(ports[i], 16)) && (inb(ports[i]) == 0xff))
						break;
				}
			if (ports[i]) {
				outb(0x59, 0x779);
				outb(0xb9, 0x379);
				outb(0xc5, 0x379);
				outb(0xae, 0x379);
				outb(0xa6, 0x379);
				outb(0x80 | i, 0x379);	/* set io port to be used */
				outb(0xc0, ports[i] + 9);
				if (inb(ports[i] + 9) != 0x80)
					continue;
				else
					overrides[current_override].NCR5380_map_name = ports[i];
			} else
				continue;
		}

		request_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380");
#else
		if (check_mem_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size))
			continue;
		request_mem_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size, "ncr5380");
#endif
		instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
		if (instance == NULL) {
#ifdef CONFIG_SCSI_G_NCR5380_PORT
			release_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size);
#else
			release_mem_region(overrides[current_override].NCR5380_map_name, NCR5380_region_size);
#endif
			continue;
		}

		instance->NCR5380_instance_name = overrides[current_override].NCR5380_map_name;

		NCR5380_init(instance, flags);

		if (overrides[current_override].irq != IRQ_AUTO)
			instance->irq = overrides[current_override].irq;
		else
			instance->irq = NCR5380_probe_irq(instance, 0xffff);

		if (instance->irq != IRQ_NONE)
			if (request_irq(instance->irq, do_generic_NCR5380_intr, SA_INTERRUPT, "NCR5380", NULL)) {
				printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
				instance->irq = IRQ_NONE;
			}

		if (instance->irq == IRQ_NONE) {
			printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
			printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
		}

		printk(KERN_INFO "scsi%d : at " STRVAL(NCR5380_map_name) " 0x%x", instance->host_no, (unsigned int) instance->NCR5380_instance_name);
		if (instance->irq == IRQ_NONE)
			printk(" interrupts disabled");
		else
			printk(" irq %d", instance->irq);
		printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d", CAN_QUEUE, CMD_PER_LUN, GENERIC_NCR5380_PUBLIC_RELEASE);
		NCR5380_print_options(instance);
		printk("\n");

		++current_override;
		++count;
	}
	return count;
}

/**