blob: bf1d4d1b9531233dfdcc36c5951b1bfd86e6ac9a [file] [log] [blame]
/*
* 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/io.h>
#include "../parisc/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 "zalon.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);
}
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;
}