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/*

 * Zalon 53c7xx device driver.

 * By Richard Hirst (rhirst@linuxcare.com)

 */

#include <linux/init.h>

#include <linux/types.h>

#include <linux/stat.h>

#include <linux/mm.h>

#include <linux/blk.h>

#include <linux/sched.h>

#include <linux/version.h>

#include <linux/config.h>

#include <linux/module.h>

#include <asm/page.h>

#include <asm/pgtable.h>

#include <asm/irq.h>

#include <asm/hardware.h>

#include <asm/delay.h>

#include <asm/gsc.h>

#include "scsi.h"

#include "hosts.h"

/*

 * **      Define the BSD style u_int32 and u_int64 type.

 * **      Are in fact u_int32_t and u_int64_t :-)

 * */

typedef u32 u_int32;

typedef u64 u_int64;

typedef u_long          vm_offset_t;

#include "zalon7xx.h"

/* hosts_* are kluges to pass info between the zalon7xx_detected()

** and the register_parisc_driver() callbacks.

*/

static Scsi_Host_Template *hosts_tptr;

static int hosts_used=0;

static int zalon_id = 0;

extern int zalon_attach(Scsi_Host_Template *tpnt,

                        unsigned long base_addr,

                        struct parisc_device *dev,

                        int irq_vector,

                        int unit

                        );

#if 0

/* FIXME:

 * Is this function dead code? or is someone planning on using it in the

 * future.  The clock = (int) pdc_result[16] does not look correct to

 * me ... I think it should be iodc_data[16].  Since this cause a compile

 * error with the new encapsulated PDC, I'm not compiling in this function.

 * - RB

 */

/* poke SCSI clock out of iodc data */

static u8 iodc_data[32] __attribute__ ((aligned (64)));

static unsigned long pdc_result[32] __attribute__ ((aligned (16))) ={0,0,0,0};

static int

lasi_scsi_clock(void * hpa, int defaultclock)

{

        int clock, status;

        status = pdc_iodc_read(&pdc_result, hpa, 0, &iodc_data, 32 );

        if (status == PDC_RET_OK) {

                clock = (int) pdc_result[16];

        } else {

                printk(KERN_WARNING "%s: pdc_iodc_read returned %d\n", __FUNCTION__, status);

                clock = defaultclock;

        }

        printk(KERN_DEBUG "%s: SCSI clock %d\n", __FUNCTION__, clock);

        return clock;

}

#endif

static int __init

zalon_scsi_callback(struct parisc_device *dev)

{

        struct gsc_irq gsc_irq;

        u32 zalon_vers;

        int irq;

        unsigned long zalon = dev->hpa;

        __raw_writel(CMD_RESET, zalon + IO_MODULE_IO_COMMAND);

        while (!(__raw_readl(zalon + IO_MODULE_IO_STATUS) & IOSTATUS_RY))

                ;

        __raw_writel(IOIIDATA_MINT5EN | IOIIDATA_PACKEN | IOIIDATA_PREFETCHEN,

                zalon + IO_MODULE_II_CDATA);

        /* XXX: Save the Zalon version for bug workarounds? */

        zalon_vers = __raw_readl(dev->hpa + IO_MODULE_II_CDATA) & 0x07000000;

        zalon_vers >>= 24;

        /* Setup the interrupts first.

        ** Later on request_irq() will register the handler.

        */

        irq = gsc_alloc_irq(&gsc_irq);

        printk("%s: Zalon vers field is 0x%x, IRQ %d\n", __FUNCTION__,

                zalon_vers, irq);

        __raw_writel(gsc_irq.txn_addr | gsc_irq.txn_data, dev->hpa + IO_MODULE_EIM);

        if ( zalon_vers == 0)

                printk(KERN_WARNING "%s: Zalon 1.1 or earlier\n", __FUNCTION__);

        /*

        **  zalon_attach: returns -1 on failure, 0 on success

        */

        hosts_used = zalon_attach(hosts_tptr, dev->hpa + GSC_SCSI_ZALON_OFFSET,

                        dev, irq, zalon_id);

        if (hosts_used == 0)

                zalon_id++;

        hosts_used = (hosts_used == 0);

        return (hosts_used == 0);

}

static struct parisc_device_id zalon_tbl[] = {

        { HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00089 },

        { 0, }

};

MODULE_DEVICE_TABLE(parisc, zalon_tbl);

static struct parisc_driver zalon_driver = {

        name:           "GSC SCSI (Zalon)",

        id_table:       zalon_tbl,

        probe:          zalon_scsi_callback,

};

int zalon7xx_detect(Scsi_Host_Template *tpnt)

{

        /* "pass" the parameter to the callback functions */

        hosts_tptr = tpnt;

        hosts_used = 0;

        /* claim all zalon cards. */

        register_parisc_driver(&zalon_driver);

        /* Check if any callbacks actually found/claimed anything. */

        return (hosts_used != 0);

}

#ifdef MODULE

extern int ncr53c8xx_release(struct Scsi_Host *host);

int zalon7xx_release(struct Scsi_Host *host)

{

        ncr53c8xx_release(host);

        unregister_parisc_driver(&zalon_driver);

        return 1;

}

#endif