[mirror_ubuntu-zesty-kernel.git] / drivers / scsi / mvme147.c

#include <linux/types.h>
#include <linux/mm.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>

#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/mvme147hw.h>
#include <asm/irq.h>

#include "scsi.h"
#include <scsi/scsi_host.h>
#include "wd33c93.h"
#include "mvme147.h"

#include<linux/stat.h>

#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))

static struct Scsi_Host *mvme147_host = NULL;

static irqreturn_t mvme147_intr (int irq, void *dummy)
{
    if (irq == MVME147_IRQ_SCSI_PORT)
	wd33c93_intr (mvme147_host);
    else
	m147_pcc->dma_intr = 0x89;	/* Ack and enable ints */
    return IRQ_HANDLED;
}

static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
{
    unsigned char flags = 0x01;
    unsigned long addr = virt_to_bus(cmd->SCp.ptr);

    /* setup dma direction */
    if (!dir_in)
	flags |= 0x04;

    /* remember direction */
    HDATA(mvme147_host)->dma_dir = dir_in;

    if (dir_in)
  	/* invalidate any cache */
	cache_clear (addr, cmd->SCp.this_residual);
    else
	/* push any dirty cache */
	cache_push (addr, cmd->SCp.this_residual);

    /* start DMA */
    m147_pcc->dma_bcr   = cmd->SCp.this_residual | (1<<24);
    m147_pcc->dma_dadr  = addr;
    m147_pcc->dma_cntrl = flags;

    /* return success */
    return 0;
}

static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
		      int status)
{
    m147_pcc->dma_cntrl = 0;
}

int mvme147_detect(struct scsi_host_template *tpnt)
{
    static unsigned char called = 0;
    wd33c93_regs regs;

    if (!MACH_IS_MVME147 || called)
	return 0;
    called++;

    tpnt->proc_name = "MVME147";
    tpnt->proc_info = &wd33c93_proc_info;

    mvme147_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata));
    if (!mvme147_host)
	    goto err_out;

    mvme147_host->base = 0xfffe4000;
    mvme147_host->irq = MVME147_IRQ_SCSI_PORT;
    regs.SASR = (volatile unsigned char *)0xfffe4000;
    regs.SCMD = (volatile unsigned char *)0xfffe4001;
    HDATA(mvme147_host)->no_sync = 0xff;
    HDATA(mvme147_host)->fast = 0;
    HDATA(mvme147_host)->dma_mode = CTRL_DMA;
    wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10);

    if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", mvme147_intr))
	    goto err_unregister;
    if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", mvme147_intr))
	    goto err_free_irq;
#if 0	/* Disabled; causes problems booting */
    m147_pcc->scsi_interrupt = 0x10;	/* Assert SCSI bus reset */
    udelay(100);
    m147_pcc->scsi_interrupt = 0x00;	/* Negate SCSI bus reset */
    udelay(2000);
    m147_pcc->scsi_interrupt = 0x40;	/* Clear bus reset interrupt */
#endif
    m147_pcc->scsi_interrupt = 0x09;	/* Enable interrupt */

    m147_pcc->dma_cntrl = 0x00;		/* ensure DMA is stopped */
    m147_pcc->dma_intr = 0x89;		/* Ack and enable ints */

    return 1;

 err_free_irq:
    free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
 err_unregister:
    wd33c93_release();
    scsi_unregister(mvme147_host);
 err_out:
    return 0;
}

static int mvme147_bus_reset(struct scsi_cmnd *cmd)
{
	/* FIXME perform bus-specific reset */

	/* FIXME 2: kill this function, and let midlayer fallback to 
	   the same result, calling wd33c93_host_reset() */

	spin_lock_irq(cmd->device->host->host_lock);
	wd33c93_host_reset(cmd);
	spin_unlock_irq(cmd->device->host->host_lock);

	return SUCCESS;
}

#define HOSTS_C

#include "mvme147.h"

static struct scsi_host_template driver_template = {
	.proc_name		= "MVME147",
	.name			= "MVME147 built-in SCSI",
	.detect			= mvme147_detect,
	.release		= mvme147_release,
	.queuecommand		= wd33c93_queuecommand,
	.eh_abort_handler	= wd33c93_abort,
	.eh_bus_reset_handler	= mvme147_bus_reset,
	.eh_host_reset_handler	= wd33c93_host_reset,
	.can_queue		= CAN_QUEUE,
	.this_id		= 7,
	.sg_tablesize		= SG_ALL,
	.cmd_per_lun		= CMD_PER_LUN,
	.use_clustering		= ENABLE_CLUSTERING
};


#include "scsi_module.c"

int mvme147_release(struct Scsi_Host *instance)
{
#ifdef MODULE
    /* XXX Make sure DMA is stopped! */
    wd33c93_release();
    free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
    free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);
#endif
    return 1;
}
Commit	Line	Data
1da177e4 LT	1	#include <linux/types.h>
	2	#include <linux/mm.h>
	3	#include <linux/blkdev.h>
1da177e4 LT	4	#include <linux/interrupt.h>
	5
	6	#include <asm/page.h>
	7	#include <asm/pgtable.h>
	8	#include <asm/mvme147hw.h>
	9	#include <asm/irq.h>
	10
	11	#include "scsi.h"
	12	#include <scsi/scsi_host.h>
	13	#include "wd33c93.h"
	14	#include "mvme147.h"
	15
	16	#include<linux/stat.h>
	17
	18	#define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata))
	19
	20	static struct Scsi_Host *mvme147_host = NULL;
	21
7d12e780	22	static irqreturn_t mvme147_intr (int irq, void *dummy)
1da177e4 LT	23	{
	24	if (irq == MVME147_IRQ_SCSI_PORT)
	25	wd33c93_intr (mvme147_host);
	26	else
	27	m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
	28	return IRQ_HANDLED;
	29	}
	30
65396410	31	static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
1da177e4 LT	32	{
	33	unsigned char flags = 0x01;
	34	unsigned long addr = virt_to_bus(cmd->SCp.ptr);
	35
	36	/* setup dma direction */
	37	if (!dir_in)
	38	flags \|= 0x04;
	39
	40	/* remember direction */
	41	HDATA(mvme147_host)->dma_dir = dir_in;
	42
	43	if (dir_in)
	44	/* invalidate any cache */
	45	cache_clear (addr, cmd->SCp.this_residual);
	46	else
	47	/* push any dirty cache */
	48	cache_push (addr, cmd->SCp.this_residual);
	49
	50	/* start DMA */
	51	m147_pcc->dma_bcr = cmd->SCp.this_residual \| (1<<24);
	52	m147_pcc->dma_dadr = addr;
	53	m147_pcc->dma_cntrl = flags;
	54
	55	/* return success */
	56	return 0;
	57	}
	58
65396410	59	static void dma_stop(struct Scsi_Host instance, struct scsi_cmnd SCpnt,
1da177e4 LT	60	int status)
	61	{
	62	m147_pcc->dma_cntrl = 0;
	63	}
	64
d0be4a7d	65	int mvme147_detect(struct scsi_host_template *tpnt)
1da177e4 LT	66	{
	67	static unsigned char called = 0;
	68	wd33c93_regs regs;
	69
	70	if (!MACH_IS_MVME147 \|\| called)
	71	return 0;
	72	called++;
	73
	74	tpnt->proc_name = "MVME147";
	75	tpnt->proc_info = &wd33c93_proc_info;
	76
	77	mvme147_host = scsi_register (tpnt, sizeof(struct WD33C93_hostdata));
	78	if (!mvme147_host)
	79	goto err_out;
	80
	81	mvme147_host->base = 0xfffe4000;
	82	mvme147_host->irq = MVME147_IRQ_SCSI_PORT;
	83	regs.SASR = (volatile unsigned char *)0xfffe4000;
	84	regs.SCMD = (volatile unsigned char *)0xfffe4001;
a579dab1 JB	85	HDATA(mvme147_host)->no_sync = 0xff;
	86	HDATA(mvme147_host)->fast = 0;
	87	HDATA(mvme147_host)->dma_mode = CTRL_DMA;
1da177e4 LT	88	wd33c93_init(mvme147_host, regs, dma_setup, dma_stop, WD33C93_FS_8_10);
	89
	90	if (request_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr, 0, "MVME147 SCSI PORT", mvme147_intr))
	91	goto err_unregister;
	92	if (request_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr, 0, "MVME147 SCSI DMA", mvme147_intr))
	93	goto err_free_irq;
	94	#if 0 /* Disabled; causes problems booting */
	95	m147_pcc->scsi_interrupt = 0x10; /* Assert SCSI bus reset */
	96	udelay(100);
	97	m147_pcc->scsi_interrupt = 0x00; /* Negate SCSI bus reset */
	98	udelay(2000);
	99	m147_pcc->scsi_interrupt = 0x40; /* Clear bus reset interrupt */
	100	#endif
	101	m147_pcc->scsi_interrupt = 0x09; /* Enable interrupt */
	102
	103	m147_pcc->dma_cntrl = 0x00; /* ensure DMA is stopped */
	104	m147_pcc->dma_intr = 0x89; /* Ack and enable ints */
	105
	106	return 1;
	107
	108	err_free_irq:
	109	free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
	110	err_unregister:
	111	wd33c93_release();
	112	scsi_unregister(mvme147_host);
	113	err_out:
	114	return 0;
	115	}
	116
65396410	117	static int mvme147_bus_reset(struct scsi_cmnd *cmd)
1da177e4 LT	118	{
1da177e4 LT	119	/* FIXME perform bus-specific reset */
68b3aa7c	120
df0ae249 JG	121	/* FIXME 2: kill this function, and let midlayer fallback to
	122	the same result, calling wd33c93_host_reset() */
	123
68b3aa7c	124	spin_lock_irq(cmd->device->host->host_lock);
1da177e4	125	wd33c93_host_reset(cmd);
68b3aa7c JG	126	spin_unlock_irq(cmd->device->host->host_lock);
68b3aa7c JG	127
1da177e4 LT	128	return SUCCESS;
	129	}
	130
	131	#define HOSTS_C
	132
	133	#include "mvme147.h"
	134
d0be4a7d	135	static struct scsi_host_template driver_template = {
1da177e4 LT	136	.proc_name = "MVME147",
	137	.name = "MVME147 built-in SCSI",
	138	.detect = mvme147_detect,
	139	.release = mvme147_release,
	140	.queuecommand = wd33c93_queuecommand,
	141	.eh_abort_handler = wd33c93_abort,
	142	.eh_bus_reset_handler = mvme147_bus_reset,
	143	.eh_host_reset_handler = wd33c93_host_reset,
	144	.can_queue = CAN_QUEUE,
	145	.this_id = 7,
	146	.sg_tablesize = SG_ALL,
	147	.cmd_per_lun = CMD_PER_LUN,
	148	.use_clustering = ENABLE_CLUSTERING
	149	};
	150
	151
	152	#include "scsi_module.c"
	153
	154	int mvme147_release(struct Scsi_Host *instance)
	155	{
	156	#ifdef MODULE
	157	/* XXX Make sure DMA is stopped! */
	158	wd33c93_release();
	159	free_irq(MVME147_IRQ_SCSI_PORT, mvme147_intr);
	160	free_irq(MVME147_IRQ_SCSI_DMA, mvme147_intr);
	161	#endif
	162	return 1;
	163	}