Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/* -*- mode: c; c-basic-offset: 8 -*- */

/* PARISC LASI driver for the 53c700 chip

 *

 * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com

**-----------------------------------------------------------------------------

**

**  This program is free software; you can redistribute it and/or modify

**  it under the terms of the GNU General Public License as published by

**  the Free Software Foundation; either version 2 of the License, or

**  (at your option) any later version.

**

**  This program is distributed in the hope that it will be useful,

**  but WITHOUT ANY WARRANTY; without even the implied warranty of

**  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

**  GNU General Public License for more details.

**

**  You should have received a copy of the GNU General Public License

**  along with this program; if not, write to the Free Software

**  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

**

**-----------------------------------------------------------------------------

 */

/*

 * Many thanks to Richard Hirst <rhirst@linuxcare.com> for patiently

 * debugging this driver on the parisc architecture and suggesting

 * many improvements and bug fixes.

 *

 * Thanks also go to Linuxcare Inc. for providing several PARISC

 * machines for me to debug the driver on.

 */

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/types.h>

#include <linux/stat.h>

#include <linux/mm.h>

#include <linux/blkdev.h>

#include <linux/ioport.h>

#include <linux/dma-mapping.h>

#include <asm/page.h>

#include <asm/pgtable.h>

#include <asm/irq.h>

#include <asm/hardware.h>

#include <asm/parisc-device.h>

#include <asm/delay.h>

#include <scsi/scsi_host.h>

#include <scsi/scsi_device.h>

#include <scsi/scsi_transport.h>

#include <scsi/scsi_transport_spi.h>

#include "53c700.h"

MODULE_AUTHOR("James Bottomley");

MODULE_DESCRIPTION("lasi700 SCSI Driver");

MODULE_LICENSE("GPL");

#define LASI_700_SVERSION 0x00071

#define LASI_710_SVERSION 0x00082

#define LASI700_ID_TABLE {                      \

        .hw_type        = HPHW_FIO,             \

        .sversion       = LASI_700_SVERSION,    \

        .hversion       = HVERSION_ANY_ID,      \

        .hversion_rev   = HVERSION_REV_ANY_ID,  \

}

#define LASI710_ID_TABLE {                      \

        .hw_type        = HPHW_FIO,             \

        .sversion       = LASI_710_SVERSION,    \

        .hversion       = HVERSION_ANY_ID,      \

        .hversion_rev   = HVERSION_REV_ANY_ID,  \

}

#define LASI700_CLOCK   25

#define LASI710_CLOCK   40

#define LASI_SCSI_CORE_OFFSET 0x100

static struct parisc_device_id lasi700_ids[] = {

        LASI700_ID_TABLE,

        LASI710_ID_TABLE,

        { 0 }

};

static struct scsi_host_template lasi700_template = {

        .name           = "LASI SCSI 53c700",

        .proc_name      = "lasi700",

        .this_id        = 7,

        .module         = THIS_MODULE,

};

MODULE_DEVICE_TABLE(parisc, lasi700_ids);

static int __init

lasi700_probe(struct parisc_device *dev)

{

        unsigned long base = dev->hpa.start + LASI_SCSI_CORE_OFFSET;

        struct NCR_700_Host_Parameters *hostdata;

        struct Scsi_Host *host;

        hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);

        if (!hostdata) {

                printk(KERN_ERR "%s: Failed to allocate host data\n",

                       dev->dev.bus_id);

                return -ENOMEM;

        }

        hostdata->dev = &dev->dev;

        dma_set_mask(&dev->dev, DMA_32BIT_MASK);

        hostdata->base = ioremap_nocache(base, 0x100);

        hostdata->differential = 0;

        if (dev->id.sversion == LASI_700_SVERSION) {

                hostdata->clock = LASI700_CLOCK;

                hostdata->force_le_on_be = 1;

        } else {

                hostdata->clock = LASI710_CLOCK;

                hostdata->force_le_on_be = 0;

                hostdata->chip710 = 1;

                hostdata->dmode_extra = DMODE_FC2;

                hostdata->burst_length = 8;

        }

        host = NCR_700_detect(&lasi700_template, hostdata, &dev->dev);

        if (!host)

                goto out_kfree;

        host->this_id = 7;

        host->base = base;

        host->irq = dev->irq;

        if(request_irq(dev->irq, NCR_700_intr, IRQF_SHARED, "lasi700", host)) {

                printk(KERN_ERR "lasi700: request_irq failed!\n");

                goto out_put_host;

        }

        dev_set_drvdata(&dev->dev, host);

        scsi_scan_host(host);

        return 0;

 out_put_host:

        scsi_host_put(host);

 out_kfree:

        iounmap(hostdata->base);

        kfree(hostdata);

        return -ENODEV;

}

static int __exit

lasi700_driver_remove(struct parisc_device *dev)

{

        struct Scsi_Host *host = dev_get_drvdata(&dev->dev);

        struct NCR_700_Host_Parameters *hostdata =

                (struct NCR_700_Host_Parameters *)host->hostdata[0];

        scsi_remove_host(host);

        NCR_700_release(host);

        free_irq(host->irq, host);

        iounmap(hostdata->base);

        kfree(hostdata);

        return 0;

}

static struct parisc_driver lasi700_driver = {

        .name =         "lasi_scsi",

        .id_table =     lasi700_ids,

        .probe =        lasi700_probe,

        .remove =       __devexit_p(lasi700_driver_remove),

};

static int __init

lasi700_init(void)

{

        return register_parisc_driver(&lasi700_driver);

}

static void __exit

lasi700_exit(void)

{

        unregister_parisc_driver(&lasi700_driver);

}

module_init(lasi700_init);

module_exit(lasi700_exit);