int __init sgiwd93_detect(Scsi_Host_Template *SGIblows)
{
static unsigned char called = 0;
struct hpc3_scsiregs *hregs = &hpc3c0->scsi_chan0;
struct hpc3_scsiregs *hregs1 = &hpc3c0->scsi_chan1;
struct WD33C93_hostdata *hdata;
struct WD33C93_hostdata *hdata1;
wd33c93_regs regs;
uchar *buf;
if(called)
return 0; /* Should bitch on the console about this... */
SGIblows->proc_name = "SGIWD93";
sgiwd93_host = scsi_register(SGIblows, sizeof(struct WD33C93_hostdata));
if(sgiwd93_host == NULL)
return 0;
sgiwd93_host->base = (unsigned long) hregs;
sgiwd93_host->irq = SGI_WD93_0_IRQ;
buf = (uchar *) get_zeroed_page(GFP_KERNEL);
if (!buf) {
printk(KERN_WARNING "sgiwd93: Could not allocate memory for host0 buffer.\n");
scsi_unregister(sgiwd93_host);
return 0;
}
init_hpc_chain(buf);
/* HPC_SCSI_REG0 | 0x03 | KSEG1 */
regs.SASR = (unsigned char*) KSEG1ADDR (0x1fbc0003);
regs.SCMD = (unsigned char*) KSEG1ADDR (0x1fbc0007);
wd33c93_init(sgiwd93_host, regs, dma_setup, dma_stop, WD33C93_FS_16_20);
hdata = (struct WD33C93_hostdata *)sgiwd93_host->hostdata;
hdata->no_sync = 0;
hdata->dma_bounce_buffer = (uchar *) (KSEG1ADDR(buf));
if (request_irq(SGI_WD93_0_IRQ, sgiwd93_intr, 0, "SGI WD93", (void *) sgiwd93_host)) {
printk(KERN_WARNING "sgiwd93: Could not register IRQ %d (for host 0).\n", SGI_WD93_0_IRQ);
wd33c93_release();
free_page((unsigned long)buf);
scsi_unregister(sgiwd93_host);
return 0;
}
/* set up second controller on the Indigo2 */
if(!sgi_guiness) {
sgiwd93_host1 = scsi_register(SGIblows, sizeof(struct WD33C93_hostdata));
if(sgiwd93_host1 != NULL)
{
sgiwd93_host1->base = (unsigned long) hregs1;
sgiwd93_host1->irq = SGI_WD93_1_IRQ;
buf = (uchar *) get_zeroed_page(GFP_KERNEL);
if (!buf) {
printk(KERN_WARNING "sgiwd93: Could not allocate memory for host1 buffer.\n");
scsi_unregister(sgiwd93_host1);
called = 1;
return 1; /* We registered host0 so return success*/
}
init_hpc_chain(buf);
/* HPC_SCSI_REG1 | 0x03 | KSEG1 */
regs.SASR = (unsigned char*) KSEG1ADDR(0x1fbc8003);
regs.SCMD = (unsigned char*) KSEG1ADDR(0x1fbc8007);
wd33c93_init(sgiwd93_host1, regs, dma_setup, dma_stop,
WD33C93_FS_16_20);
hdata1 = (struct WD33C93_hostdata *)sgiwd93_host1->hostdata;
hdata1->no_sync = 0;
hdata1->dma_bounce_buffer = (uchar *) (KSEG1ADDR(buf));
if (request_irq(SGI_WD93_1_IRQ, sgiwd93_intr, 0, "SGI WD93", (void *) sgiwd93_host1)) {
printk(KERN_WARNING "sgiwd93: Could not allocate irq %d (for host1).\n", SGI_WD93_1_IRQ);
wd33c93_release();
free_page((unsigned long)buf);
scsi_unregister(sgiwd93_host1);
/* Fall through since host0 registered OK */
}
}
}
called = 1;
return 1; /* Found one. */
}
static int __devinit sgiwd93_probe(struct platform_device *pdev)
{
struct sgiwd93_platform_data *pd = pdev->dev.platform_data;
unsigned char *wdregs = pd->wdregs;
struct hpc3_scsiregs *hregs = pd->hregs;
struct ip22_hostdata *hdata;
struct Scsi_Host *host;
wd33c93_regs regs;
unsigned int unit = pd->unit;
unsigned int irq = pd->irq;
int err;
host = scsi_host_alloc(&sgiwd93_template, sizeof(struct ip22_hostdata));
if (!host) {
err = -ENOMEM;
goto out;
}
host->base = (unsigned long) hregs;
host->irq = irq;
hdata = host_to_hostdata(host);
hdata->dev = &pdev->dev;
hdata->cpu = dma_alloc_noncoherent(&pdev->dev, HPC_DMA_SIZE,
&hdata->dma, GFP_KERNEL);
if (!hdata->cpu) {
printk(KERN_WARNING "sgiwd93: Could not allocate memory for "
"host %d buffer.\n", unit);
err = -ENOMEM;
goto out_put;
}
init_hpc_chain(hdata);
regs.SASR = wdregs + 3;
regs.SCMD = wdregs + 7;
hdata->wh.no_sync = 0;
hdata->wh.fast = 1;
hdata->wh.dma_mode = CTRL_BURST;
wd33c93_init(host, regs, dma_setup, dma_stop, WD33C93_FS_MHZ(20));
err = request_irq(irq, sgiwd93_intr, 0, "SGI WD93", host);
if (err) {
printk(KERN_WARNING "sgiwd93: Could not register irq %d "
"for host %d.\n", irq, unit);
goto out_free;
}
platform_set_drvdata(pdev, host);
err = scsi_add_host(host, NULL);
if (err)
goto out_irq;
scsi_scan_host(host);
return 0;
out_irq:
free_irq(irq, host);
out_free:
dma_free_noncoherent(&pdev->dev, HPC_DMA_SIZE, hdata->cpu, hdata->dma);
out_put:
scsi_host_put(host);
out:
return err;
}
