[mirror_ubuntu-artful-kernel.git] / drivers / scsi / mac_scsi.c

/*
 * Generic Macintosh NCR5380 driver
 *
 * Copyright 1998, Michael Schmitz <mschmitz@lbl.gov>
 *
 * derived in part from:
 */
/*
 * Generic Generic NCR5380 driver
 *
 * Copyright 1995, Russell King
 */

#include <linux/types.h>
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>

#include <asm/hwtest.h>
#include <asm/io.h>
#include <asm/macints.h>
#include <asm/setup.h>

#include <scsi/scsi_host.h>

/* Definitions for the core NCR5380 driver. */

#define PSEUDO_DMA

#define NCR5380_implementation_fields   unsigned char *pdma_base

#define NCR5380_read(reg)               macscsi_read(instance, reg)
#define NCR5380_write(reg, value)       macscsi_write(instance, reg, value)

#define NCR5380_pread                   macscsi_pread
#define NCR5380_pwrite                  macscsi_pwrite
#define NCR5380_dma_xfer_len(instance, cmd, phase)	(cmd->transfersize)

#define NCR5380_intr                    macscsi_intr
#define NCR5380_queue_command           macscsi_queue_command
#define NCR5380_abort                   macscsi_abort
#define NCR5380_bus_reset               macscsi_bus_reset
#define NCR5380_info                    macscsi_info
#define NCR5380_show_info               macscsi_show_info
#define NCR5380_write_info              macscsi_write_info

#include "NCR5380.h"

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);
static int setup_use_pdma = -1;
module_param(setup_use_pdma, int, 0);
static int setup_use_tagged_queuing = -1;
module_param(setup_use_tagged_queuing, int, 0);
static int setup_hostid = -1;
module_param(setup_hostid, int, 0);
static int setup_toshiba_delay = -1;
module_param(setup_toshiba_delay, int, 0);

/*
 * NCR 5380 register access functions
 */

static inline char macscsi_read(struct Scsi_Host *instance, int reg)
{
	return in_8(instance->base + (reg << 4));
}

static inline void macscsi_write(struct Scsi_Host *instance, int reg, int value)
{
	out_8(instance->base + (reg << 4), value);
}

#ifndef MODULE
static int __init mac_scsi_setup(char *str)
{
	int ints[8];

	(void)get_options(str, ARRAY_SIZE(ints), ints);

	if (ints[0] < 1) {
		pr_err("Usage: mac5380=<can_queue>[,<cmd_per_lun>[,<sg_tablesize>[,<hostid>[,<use_tags>[,<use_pdma>[,<toshiba_delay>]]]]]]\n");
		return 0;
	}
	if (ints[0] >= 1)
		setup_can_queue = ints[1];
	if (ints[0] >= 2)
		setup_cmd_per_lun = ints[2];
	if (ints[0] >= 3)
		setup_sg_tablesize = ints[3];
	if (ints[0] >= 4)
		setup_hostid = ints[4];
	if (ints[0] >= 5)
		setup_use_tagged_queuing = ints[5];
	if (ints[0] >= 6)
		setup_use_pdma = ints[6];
	if (ints[0] >= 7)
		setup_toshiba_delay = ints[7];
	return 1;
}

__setup("mac5380=", mac_scsi_setup);
#endif /* !MODULE */

#ifdef PSEUDO_DMA
/* 
   Pseudo-DMA: (Ove Edlund)
   The code attempts to catch bus errors that occur if one for example
   "trips over the cable".
   XXX: Since bus errors in the PDMA routines never happen on my 
   computer, the bus error code is untested. 
   If the code works as intended, a bus error results in Pseudo-DMA 
   being disabled, meaning that the driver switches to slow handshake.
   If bus errors are NOT extremely rare, this has to be changed. 
*/

#define CP_IO_TO_MEM(s,d,len)				\
__asm__ __volatile__					\
    ("    cmp.w  #4,%2\n"				\
     "    bls    8f\n"					\
     "    move.w %1,%%d0\n"				\
     "    neg.b  %%d0\n"				\
     "    and.w  #3,%%d0\n"				\
     "    sub.w  %%d0,%2\n"				\
     "    bra    2f\n"					\
     " 1: move.b (%0),(%1)+\n"				\
     " 2: dbf    %%d0,1b\n"				\
     "    move.w %2,%%d0\n"				\
     "    lsr.w  #5,%%d0\n"				\
     "    bra    4f\n"					\
     " 3: move.l (%0),(%1)+\n"				\
     "31: move.l (%0),(%1)+\n"				\
     "32: move.l (%0),(%1)+\n"				\
     "33: move.l (%0),(%1)+\n"				\
     "34: move.l (%0),(%1)+\n"				\
     "35: move.l (%0),(%1)+\n"				\
     "36: move.l (%0),(%1)+\n"				\
     "37: move.l (%0),(%1)+\n"				\
     " 4: dbf    %%d0,3b\n"				\
     "    move.w %2,%%d0\n"				\
     "    lsr.w  #2,%%d0\n"				\
     "    and.w  #7,%%d0\n"				\
     "    bra    6f\n"					\
     " 5: move.l (%0),(%1)+\n"				\
     " 6: dbf    %%d0,5b\n"				\
     "    and.w  #3,%2\n"				\
     "    bra    8f\n"					\
     " 7: move.b (%0),(%1)+\n"				\
     " 8: dbf    %2,7b\n"				\
     "    moveq.l #0, %2\n"				\
     " 9: \n"						\
     ".section .fixup,\"ax\"\n"				\
     "    .even\n"					\
     "90: moveq.l #1, %2\n"				\
     "    jra 9b\n"					\
     ".previous\n"					\
     ".section __ex_table,\"a\"\n"			\
     "   .align 4\n"					\
     "   .long  1b,90b\n"				\
     "   .long  3b,90b\n"				\
     "   .long 31b,90b\n"				\
     "   .long 32b,90b\n"				\
     "   .long 33b,90b\n"				\
     "   .long 34b,90b\n"				\
     "   .long 35b,90b\n"				\
     "   .long 36b,90b\n"				\
     "   .long 37b,90b\n"				\
     "   .long  5b,90b\n"				\
     "   .long  7b,90b\n"				\
     ".previous"					\
     : "=a"(s), "=a"(d), "=d"(len)			\
     : "0"(s), "1"(d), "2"(len)				\
     : "d0")

static int macscsi_pread(struct Scsi_Host *instance,
                         unsigned char *dst, int len)
{
	struct NCR5380_hostdata *hostdata = shost_priv(instance);
	unsigned char *d;
	unsigned char *s;

	s = hostdata->pdma_base + (INPUT_DATA_REG << 4);
	d = dst;

	/* These conditions are derived from MacOS */

	while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) &&
	       !(NCR5380_read(STATUS_REG) & SR_REQ))
		;

	if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) &&
	    (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)) {
		pr_err("Error in macscsi_pread\n");
		return -1;
	}

	CP_IO_TO_MEM(s, d, len);

	if (len != 0) {
		pr_notice("Bus error in macscsi_pread\n");
		return -1;
	}

	return 0;
}


#define CP_MEM_TO_IO(s,d,len)				\
__asm__ __volatile__					\
    ("    cmp.w  #4,%2\n"				\
     "    bls    8f\n"					\
     "    move.w %0,%%d0\n"				\
     "    neg.b  %%d0\n"				\
     "    and.w  #3,%%d0\n"				\
     "    sub.w  %%d0,%2\n"				\
     "    bra    2f\n"					\
     " 1: move.b (%0)+,(%1)\n"				\
     " 2: dbf    %%d0,1b\n"				\
     "    move.w %2,%%d0\n"				\
     "    lsr.w  #5,%%d0\n"				\
     "    bra    4f\n"					\
     " 3: move.l (%0)+,(%1)\n"				\
     "31: move.l (%0)+,(%1)\n"				\
     "32: move.l (%0)+,(%1)\n"				\
     "33: move.l (%0)+,(%1)\n"				\
     "34: move.l (%0)+,(%1)\n"				\
     "35: move.l (%0)+,(%1)\n"				\
     "36: move.l (%0)+,(%1)\n"				\
     "37: move.l (%0)+,(%1)\n"				\
     " 4: dbf    %%d0,3b\n"				\
     "    move.w %2,%%d0\n"				\
     "    lsr.w  #2,%%d0\n"				\
     "    and.w  #7,%%d0\n"				\
     "    bra    6f\n"					\
     " 5: move.l (%0)+,(%1)\n"				\
     " 6: dbf    %%d0,5b\n"				\
     "    and.w  #3,%2\n"				\
     "    bra    8f\n"					\
     " 7: move.b (%0)+,(%1)\n"				\
     " 8: dbf    %2,7b\n"				\
     "    moveq.l #0, %2\n"				\
     " 9: \n"						\
     ".section .fixup,\"ax\"\n"				\
     "    .even\n"					\
     "90: moveq.l #1, %2\n"				\
     "    jra 9b\n"					\
     ".previous\n"					\
     ".section __ex_table,\"a\"\n"			\
     "   .align 4\n"					\
     "   .long  1b,90b\n"				\
     "   .long  3b,90b\n"				\
     "   .long 31b,90b\n"				\
     "   .long 32b,90b\n"				\
     "   .long 33b,90b\n"				\
     "   .long 34b,90b\n"				\
     "   .long 35b,90b\n"				\
     "   .long 36b,90b\n"				\
     "   .long 37b,90b\n"				\
     "   .long  5b,90b\n"				\
     "   .long  7b,90b\n"				\
     ".previous"					\
     : "=a"(s), "=a"(d), "=d"(len)			\
     : "0"(s), "1"(d), "2"(len)				\
     : "d0")

static int macscsi_pwrite(struct Scsi_Host *instance,
                          unsigned char *src, int len)
{
	struct NCR5380_hostdata *hostdata = shost_priv(instance);
	unsigned char *s;
	unsigned char *d;

	s = src;
	d = hostdata->pdma_base + (OUTPUT_DATA_REG << 4);

	/* These conditions are derived from MacOS */

	while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) &&
	       (!(NCR5380_read(STATUS_REG) & SR_REQ) ||
	        (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)))
		;

	if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ)) {
		pr_err("Error in macscsi_pwrite\n");
		return -1;
	}

	CP_MEM_TO_IO(s, d, len);

	if (len != 0) {
		pr_notice("Bus error in macscsi_pwrite\n");
		return -1;
	}

	return 0;
}
#endif

#include "NCR5380.c"

#define DRV_MODULE_NAME         "mac_scsi"
#define PFX                     DRV_MODULE_NAME ": "

static struct scsi_host_template mac_scsi_template = {
	.module				= THIS_MODULE,
	.proc_name			= DRV_MODULE_NAME,
	.show_info			= macscsi_show_info,
	.write_info			= macscsi_write_info,
	.name				= "Macintosh NCR5380 SCSI",
	.info				= macscsi_info,
	.queuecommand			= macscsi_queue_command,
	.eh_abort_handler		= macscsi_abort,
	.eh_bus_reset_handler		= macscsi_bus_reset,
	.can_queue			= 16,
	.this_id			= 7,
	.sg_tablesize			= SG_ALL,
	.cmd_per_lun			= 2,
	.use_clustering			= DISABLE_CLUSTERING
};

static int __init mac_scsi_probe(struct platform_device *pdev)
{
	struct Scsi_Host *instance;
	int error;
	int host_flags = 0;
	struct resource *irq, *pio_mem, *pdma_mem = NULL;

	pio_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!pio_mem)
		return -ENODEV;

#ifdef PSEUDO_DMA
	pdma_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
#endif

	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);

	if (!hwreg_present((unsigned char *)pio_mem->start +
	                   (STATUS_REG << 4))) {
		pr_info(PFX "no device detected at %pap\n", &pio_mem->start);
		return -ENODEV;
	}

	if (setup_can_queue > 0)
		mac_scsi_template.can_queue = setup_can_queue;
	if (setup_cmd_per_lun > 0)
		mac_scsi_template.cmd_per_lun = setup_cmd_per_lun;
	if (setup_sg_tablesize >= 0)
		mac_scsi_template.sg_tablesize = setup_sg_tablesize;
	if (setup_hostid >= 0)
		mac_scsi_template.this_id = setup_hostid & 7;
	if (setup_use_pdma < 0)
		setup_use_pdma = 0;

	instance = scsi_host_alloc(&mac_scsi_template,
	                           sizeof(struct NCR5380_hostdata));
	if (!instance)
		return -ENOMEM;

	instance->base = pio_mem->start;
	if (irq)
		instance->irq = irq->start;
	else
		instance->irq = NO_IRQ;

	if (pdma_mem && setup_use_pdma) {
		struct NCR5380_hostdata *hostdata = shost_priv(instance);

		hostdata->pdma_base = (unsigned char *)pdma_mem->start;
	} else
		host_flags |= FLAG_NO_PSEUDO_DMA;

#ifdef SUPPORT_TAGS
	host_flags |= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0;
#endif
	host_flags |= setup_toshiba_delay > 0 ? FLAG_TOSHIBA_DELAY : 0;

	error = NCR5380_init(instance, host_flags);
	if (error)
		goto fail_init;

	if (instance->irq != NO_IRQ) {
		error = request_irq(instance->irq, macscsi_intr, IRQF_SHARED,
		                    "NCR5380", instance);
		if (error)
			goto fail_irq;
	}

	NCR5380_maybe_reset_bus(instance);

	error = scsi_add_host(instance, NULL);
	if (error)
		goto fail_host;

	platform_set_drvdata(pdev, instance);

	scsi_scan_host(instance);
	return 0;

fail_host:
	if (instance->irq != NO_IRQ)
		free_irq(instance->irq, instance);
fail_irq:
	NCR5380_exit(instance);
fail_init:
	scsi_host_put(instance);
	return error;
}

static int __exit mac_scsi_remove(struct platform_device *pdev)
{
	struct Scsi_Host *instance = platform_get_drvdata(pdev);

	scsi_remove_host(instance);
	if (instance->irq != NO_IRQ)
		free_irq(instance->irq, instance);
	NCR5380_exit(instance);
	scsi_host_put(instance);
	return 0;
}

static struct platform_driver mac_scsi_driver = {
	.remove = __exit_p(mac_scsi_remove),
	.driver = {
		.name	= DRV_MODULE_NAME,
	},
};

module_platform_driver_probe(mac_scsi_driver, mac_scsi_probe);

MODULE_ALIAS("platform:" DRV_MODULE_NAME);
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Generic Macintosh NCR5380 driver
	3	*
	4	* Copyright 1998, Michael Schmitz <mschmitz@lbl.gov>
	5	*
	6	* derived in part from:
	7	*/
	8	/*
	9	* Generic Generic NCR5380 driver
	10	*
	11	* Copyright 1995, Russell King
1da177e4 LT	12	*/
1da177e4 LT	13
1da177e4	14	#include <linux/types.h>
1da177e4	15	#include <linux/module.h>
1da177e4 LT	16	#include <linux/ioport.h>
	17	#include <linux/init.h>
	18	#include <linux/blkdev.h>
	19	#include <linux/interrupt.h>
cbad48de	20	#include <linux/platform_device.h>
1da177e4	21
cbad48de	22	#include <asm/hwtest.h>
1da177e4	23	#include <asm/io.h>
1da177e4	24	#include <asm/macints.h>
cbad48de	25	#include <asm/setup.h>
1da177e4	26
1da177e4	27	#include <scsi/scsi_host.h>
92de3831 FT	28
92de3831 FT	29	/* Definitions for the core NCR5380 driver. */
e744fdea	30
e744fdea BH	31	#define PSEUDO_DMA
e744fdea BH	32
cbad48de	33	#define NCR5380_implementation_fields unsigned char *pdma_base
92de3831	34
54d8fe44 FT	35	#define NCR5380_read(reg) macscsi_read(instance, reg)
54d8fe44 FT	36	#define NCR5380_write(reg, value) macscsi_write(instance, reg, value)
92de3831 FT	37
	38	#define NCR5380_pread macscsi_pread
	39	#define NCR5380_pwrite macscsi_pwrite
ff3d4578	40	#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize)
92de3831 FT	41
	42	#define NCR5380_intr macscsi_intr
	43	#define NCR5380_queue_command macscsi_queue_command
	44	#define NCR5380_abort macscsi_abort
	45	#define NCR5380_bus_reset macscsi_bus_reset
	46	#define NCR5380_info macscsi_info
	47	#define NCR5380_show_info macscsi_show_info
	48	#define NCR5380_write_info macscsi_write_info
	49
1da177e4 LT	50	#include "NCR5380.h"
1da177e4 LT	51
1da177e4	52	static int setup_can_queue = -1;
6e9ae6d5	53	module_param(setup_can_queue, int, 0);
1da177e4	54	static int setup_cmd_per_lun = -1;
6e9ae6d5	55	module_param(setup_cmd_per_lun, int, 0);
1da177e4	56	static int setup_sg_tablesize = -1;
6e9ae6d5	57	module_param(setup_sg_tablesize, int, 0);
1da177e4	58	static int setup_use_pdma = -1;
6e9ae6d5	59	module_param(setup_use_pdma, int, 0);
1da177e4	60	static int setup_use_tagged_queuing = -1;
6e9ae6d5	61	module_param(setup_use_tagged_queuing, int, 0);
1da177e4	62	static int setup_hostid = -1;
6e9ae6d5	63	module_param(setup_hostid, int, 0);
9c3f0e2b FT	64	static int setup_toshiba_delay = -1;
9c3f0e2b FT	65	module_param(setup_toshiba_delay, int, 0);
1da177e4	66
1da177e4 LT	67	/*
	68	* NCR 5380 register access functions
	69	*/
	70
cbad48de	71	static inline char macscsi_read(struct Scsi_Host *instance, int reg)
1da177e4	72	{
cbad48de	73	return in_8(instance->base + (reg << 4));
1da177e4 LT	74	}
1da177e4 LT	75
cbad48de	76	static inline void macscsi_write(struct Scsi_Host *instance, int reg, int value)
1da177e4	77	{
cbad48de	78	out_8(instance->base + (reg << 4), value);
1da177e4	79	}
1da177e4	80
6e9ae6d5 FT	81	#ifndef MODULE
	82	static int __init mac_scsi_setup(char *str)
	83	{
9c3f0e2b	84	int ints[8];
6e9ae6d5 FT	85
	86	(void)get_options(str, ARRAY_SIZE(ints), ints);
	87
9c3f0e2b FT	88	if (ints[0] < 1) {
9c3f0e2b FT	89	pr_err("Usage: mac5380=<can_queue>[,<cmd_per_lun>[,<sg_tablesize>[,<hostid>[,<use_tags>[,<use_pdma>[,<toshiba_delay>]]]]]]\n");
6e9ae6d5	90	return 0;
1da177e4	91	}
6e9ae6d5 FT	92	if (ints[0] >= 1)
	93	setup_can_queue = ints[1];
	94	if (ints[0] >= 2)
	95	setup_cmd_per_lun = ints[2];
	96	if (ints[0] >= 3)
	97	setup_sg_tablesize = ints[3];
	98	if (ints[0] >= 4)
	99	setup_hostid = ints[4];
	100	if (ints[0] >= 5)
	101	setup_use_tagged_queuing = ints[5];
	102	if (ints[0] >= 6)
1da177e4	103	setup_use_pdma = ints[6];
9c3f0e2b FT	104	if (ints[0] >= 7)
9c3f0e2b FT	105	setup_toshiba_delay = ints[7];
1da177e4 LT	106	return 1;
	107	}
	108
	109	__setup("mac5380=", mac_scsi_setup);
6e9ae6d5	110	#endif /* !MODULE */
1da177e4	111
ffdede67	112	#ifdef PSEUDO_DMA
1da177e4 LT	113	/*
	114	Pseudo-DMA: (Ove Edlund)
	115	The code attempts to catch bus errors that occur if one for example
	116	"trips over the cable".
	117	XXX: Since bus errors in the PDMA routines never happen on my
	118	computer, the bus error code is untested.
	119	If the code works as intended, a bus error results in Pseudo-DMA
542cb459	120	being disabled, meaning that the driver switches to slow handshake.
1da177e4 LT	121	If bus errors are NOT extremely rare, this has to be changed.
	122	*/
	123
	124	#define CP_IO_TO_MEM(s,d,len) \
	125	__asm__ __volatile__ \
	126	(" cmp.w #4,%2\n" \
	127	" bls 8f\n" \
	128	" move.w %1,%%d0\n" \
	129	" neg.b %%d0\n" \
	130	" and.w #3,%%d0\n" \
	131	" sub.w %%d0,%2\n" \
	132	" bra 2f\n" \
	133	" 1: move.b (%0),(%1)+\n" \
	134	" 2: dbf %%d0,1b\n" \
	135	" move.w %2,%%d0\n" \
	136	" lsr.w #5,%%d0\n" \
	137	" bra 4f\n" \
	138	" 3: move.l (%0),(%1)+\n" \
	139	"31: move.l (%0),(%1)+\n" \
	140	"32: move.l (%0),(%1)+\n" \
	141	"33: move.l (%0),(%1)+\n" \
	142	"34: move.l (%0),(%1)+\n" \
	143	"35: move.l (%0),(%1)+\n" \
	144	"36: move.l (%0),(%1)+\n" \
	145	"37: move.l (%0),(%1)+\n" \
	146	" 4: dbf %%d0,3b\n" \
	147	" move.w %2,%%d0\n" \
	148	" lsr.w #2,%%d0\n" \
	149	" and.w #7,%%d0\n" \
	150	" bra 6f\n" \
	151	" 5: move.l (%0),(%1)+\n" \
	152	" 6: dbf %%d0,5b\n" \
	153	" and.w #3,%2\n" \
	154	" bra 8f\n" \
	155	" 7: move.b (%0),(%1)+\n" \
	156	" 8: dbf %2,7b\n" \
	157	" moveq.l #0, %2\n" \
	158	" 9: \n" \
	159	".section .fixup,\"ax\"\n" \
	160	" .even\n" \
	161	"90: moveq.l #1, %2\n" \
	162	" jra 9b\n" \
	163	".previous\n" \
	164	".section __ex_table,\"a\"\n" \
	165	" .align 4\n" \
	166	" .long 1b,90b\n" \
	167	" .long 3b,90b\n" \
	168	" .long 31b,90b\n" \
	169	" .long 32b,90b\n" \
	170	" .long 33b,90b\n" \
	171	" .long 34b,90b\n" \
	172	" .long 35b,90b\n" \
	173	" .long 36b,90b\n" \
	174	" .long 37b,90b\n" \
	175	" .long 5b,90b\n" \
	176	" .long 7b,90b\n" \
	177	".previous" \
	178	: "=a"(s), "=a"(d), "=d"(len) \
	179	: "0"(s), "1"(d), "2"(len) \
	180	: "d0")
	181
ffdede67 FT	182	static int macscsi_pread(struct Scsi_Host *instance,
ffdede67 FT	183	unsigned char *dst, int len)
1da177e4	184	{
cbad48de	185	struct NCR5380_hostdata *hostdata = shost_priv(instance);
ffdede67 FT	186	unsigned char *d;
	187	unsigned char *s;
	188
cbad48de	189	s = hostdata->pdma_base + (INPUT_DATA_REG << 4);
ffdede67 FT	190	d = dst;
	191
	192	/* These conditions are derived from MacOS */
	193
	194	while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) &&
	195	!(NCR5380_read(STATUS_REG) & SR_REQ))
	196	;
	197
	198	if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) &&
	199	(NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)) {
	200	pr_err("Error in macscsi_pread\n");
	201	return -1;
	202	}
	203
	204	CP_IO_TO_MEM(s, d, len);
	205
	206	if (len != 0) {
	207	pr_notice("Bus error in macscsi_pread\n");
	208	return -1;
	209	}
	210
	211	return 0;
1da177e4 LT	212	}
	213
	214
	215	#define CP_MEM_TO_IO(s,d,len) \
	216	__asm__ __volatile__ \
	217	(" cmp.w #4,%2\n" \
	218	" bls 8f\n" \
	219	" move.w %0,%%d0\n" \
	220	" neg.b %%d0\n" \
	221	" and.w #3,%%d0\n" \
	222	" sub.w %%d0,%2\n" \
	223	" bra 2f\n" \
	224	" 1: move.b (%0)+,(%1)\n" \
	225	" 2: dbf %%d0,1b\n" \
	226	" move.w %2,%%d0\n" \
	227	" lsr.w #5,%%d0\n" \
	228	" bra 4f\n" \
	229	" 3: move.l (%0)+,(%1)\n" \
	230	"31: move.l (%0)+,(%1)\n" \
	231	"32: move.l (%0)+,(%1)\n" \
	232	"33: move.l (%0)+,(%1)\n" \
	233	"34: move.l (%0)+,(%1)\n" \
	234	"35: move.l (%0)+,(%1)\n" \
	235	"36: move.l (%0)+,(%1)\n" \
	236	"37: move.l (%0)+,(%1)\n" \
	237	" 4: dbf %%d0,3b\n" \
	238	" move.w %2,%%d0\n" \
	239	" lsr.w #2,%%d0\n" \
	240	" and.w #7,%%d0\n" \
	241	" bra 6f\n" \
	242	" 5: move.l (%0)+,(%1)\n" \
	243	" 6: dbf %%d0,5b\n" \
	244	" and.w #3,%2\n" \
	245	" bra 8f\n" \
	246	" 7: move.b (%0)+,(%1)\n" \
	247	" 8: dbf %2,7b\n" \
	248	" moveq.l #0, %2\n" \
	249	" 9: \n" \
	250	".section .fixup,\"ax\"\n" \
	251	" .even\n" \
	252	"90: moveq.l #1, %2\n" \
	253	" jra 9b\n" \
	254	".previous\n" \
	255	".section __ex_table,\"a\"\n" \
	256	" .align 4\n" \
	257	" .long 1b,90b\n" \
	258	" .long 3b,90b\n" \
	259	" .long 31b,90b\n" \
	260	" .long 32b,90b\n" \
	261	" .long 33b,90b\n" \
	262	" .long 34b,90b\n" \
	263	" .long 35b,90b\n" \
	264	" .long 36b,90b\n" \
	265	" .long 37b,90b\n" \
	266	" .long 5b,90b\n" \
	267	" .long 7b,90b\n" \
	268	".previous" \
	269	: "=a"(s), "=a"(d), "=d"(len) \
	270	: "0"(s), "1"(d), "2"(len) \
	271	: "d0")
	272
ffdede67 FT	273	static int macscsi_pwrite(struct Scsi_Host *instance,
ffdede67 FT	274	unsigned char *src, int len)
1da177e4	275	{
cbad48de	276	struct NCR5380_hostdata *hostdata = shost_priv(instance);
ffdede67 FT	277	unsigned char *s;
ffdede67 FT	278	unsigned char *d;
1da177e4	279
ffdede67	280	s = src;
cbad48de	281	d = hostdata->pdma_base + (OUTPUT_DATA_REG << 4);
ffdede67 FT	282
	283	/* These conditions are derived from MacOS */
	284
	285	while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) &&
	286	(!(NCR5380_read(STATUS_REG) & SR_REQ) \|\|
	287	(NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)))
	288	;
	289
	290	if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ)) {
	291	pr_err("Error in macscsi_pwrite\n");
	292	return -1;
	293	}
	294
	295	CP_MEM_TO_IO(s, d, len);
	296
	297	if (len != 0) {
	298	pr_notice("Bus error in macscsi_pwrite\n");
	299	return -1;
	300	}
	301
	302	return 0;
	303	}
	304	#endif
1da177e4	305
1da177e4 LT	306	#include "NCR5380.c"
1da177e4 LT	307
cbad48de FT	308	#define DRV_MODULE_NAME "mac_scsi"
	309	#define PFX DRV_MODULE_NAME ": "
	310
	311	static struct scsi_host_template mac_scsi_template = {
	312	.module = THIS_MODULE,
	313	.proc_name = DRV_MODULE_NAME,
dd7ab71b AV	314	.show_info = macscsi_show_info,
dd7ab71b AV	315	.write_info = macscsi_write_info,
1da177e4	316	.name = "Macintosh NCR5380 SCSI",
1da177e4 LT	317	.info = macscsi_info,
	318	.queuecommand = macscsi_queue_command,
	319	.eh_abort_handler = macscsi_abort,
	320	.eh_bus_reset_handler = macscsi_bus_reset,
d572f65f	321	.can_queue = 16,
1da177e4 LT	322	.this_id = 7,
1da177e4 LT	323	.sg_tablesize = SG_ALL,
d572f65f	324	.cmd_per_lun = 2,
1da177e4 LT	325	.use_clustering = DISABLE_CLUSTERING
	326	};
	327
cbad48de FT	328	static int __init mac_scsi_probe(struct platform_device *pdev)
	329	{
	330	struct Scsi_Host *instance;
	331	int error;
	332	int host_flags = 0;
	333	struct resource irq, pio_mem, *pdma_mem = NULL;
	334
	335	pio_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	336	if (!pio_mem)
	337	return -ENODEV;
	338
	339	#ifdef PSEUDO_DMA
	340	pdma_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	341	#endif
	342
	343	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	344
	345	if (!hwreg_present((unsigned char *)pio_mem->start +
	346	(STATUS_REG << 4))) {
	347	pr_info(PFX "no device detected at %pap\n", &pio_mem->start);
	348	return -ENODEV;
	349	}
	350
	351	if (setup_can_queue > 0)
	352	mac_scsi_template.can_queue = setup_can_queue;
	353	if (setup_cmd_per_lun > 0)
	354	mac_scsi_template.cmd_per_lun = setup_cmd_per_lun;
	355	if (setup_sg_tablesize >= 0)
	356	mac_scsi_template.sg_tablesize = setup_sg_tablesize;
	357	if (setup_hostid >= 0)
	358	mac_scsi_template.this_id = setup_hostid & 7;
cbad48de FT	359	if (setup_use_pdma < 0)
	360	setup_use_pdma = 0;
	361
	362	instance = scsi_host_alloc(&mac_scsi_template,
	363	sizeof(struct NCR5380_hostdata));
	364	if (!instance)
	365	return -ENOMEM;
	366
	367	instance->base = pio_mem->start;
	368	if (irq)
	369	instance->irq = irq->start;
	370	else
	371	instance->irq = NO_IRQ;
	372
	373	if (pdma_mem && setup_use_pdma) {
	374	struct NCR5380_hostdata *hostdata = shost_priv(instance);
	375
	376	hostdata->pdma_base = (unsigned char *)pdma_mem->start;
	377	} else
	378	host_flags \|= FLAG_NO_PSEUDO_DMA;
	379
ca513fc9 FT	380	#ifdef SUPPORT_TAGS
	381	host_flags \|= setup_use_tagged_queuing > 0 ? FLAG_TAGGED_QUEUING : 0;
	382	#endif
9c3f0e2b	383	host_flags \|= setup_toshiba_delay > 0 ? FLAG_TOSHIBA_DELAY : 0;
ca513fc9	384
0ad0eff9 FT	385	error = NCR5380_init(instance, host_flags);
	386	if (error)
	387	goto fail_init;
cbad48de FT	388
	389	if (instance->irq != NO_IRQ) {
	390	error = request_irq(instance->irq, macscsi_intr, IRQF_SHARED,
	391	"NCR5380", instance);
	392	if (error)
	393	goto fail_irq;
	394	}
	395
9c3f0e2b FT	396	NCR5380_maybe_reset_bus(instance);
9c3f0e2b FT	397
cbad48de FT	398	error = scsi_add_host(instance, NULL);
	399	if (error)
	400	goto fail_host;
	401
	402	platform_set_drvdata(pdev, instance);
	403
	404	scsi_scan_host(instance);
	405	return 0;
	406
	407	fail_host:
	408	if (instance->irq != NO_IRQ)
	409	free_irq(instance->irq, instance);
	410	fail_irq:
	411	NCR5380_exit(instance);
0ad0eff9	412	fail_init:
cbad48de FT	413	scsi_host_put(instance);
	414	return error;
	415	}
	416
	417	static int __exit mac_scsi_remove(struct platform_device *pdev)
	418	{
	419	struct Scsi_Host *instance = platform_get_drvdata(pdev);
	420
	421	scsi_remove_host(instance);
	422	if (instance->irq != NO_IRQ)
	423	free_irq(instance->irq, instance);
	424	NCR5380_exit(instance);
	425	scsi_host_put(instance);
	426	return 0;
	427	}
	428
	429	static struct platform_driver mac_scsi_driver = {
	430	.remove = __exit_p(mac_scsi_remove),
	431	.driver = {
	432	.name = DRV_MODULE_NAME,
cbad48de FT	433	},
cbad48de FT	434	};
1da177e4	435
cbad48de	436	module_platform_driver_probe(mac_scsi_driver, mac_scsi_probe);
6e9ae6d5	437
cbad48de	438	MODULE_ALIAS("platform:" DRV_MODULE_NAME);
6e9ae6d5	439	MODULE_LICENSE("GPL");