eesox.c

linux-2.6.15.6

			writel(l1, reg_dmadata);
			length -= 4;
			continue;
		}

		if (status >= 2) {
			writel(*(u16 *)buf << 16, reg_dmadata);
			buf += 2;
			length -= 2;
		}
	} while (length);
}

static void
eesoxscsi_dma_pseudo(struct Scsi_Host *host, struct scsi_pointer *SCp,
		     fasdmadir_t dir, int transfer_size)
{
	struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
	if (dir == DMA_IN) {
		eesoxscsi_buffer_in(SCp->ptr, SCp->this_residual, info->base);
	} else {
		eesoxscsi_buffer_out(SCp->ptr, SCp->this_residual, info->base);
	}
}

/* Prototype: int eesoxscsi_dma_stop(host, SCpnt)
 * Purpose  : stops DMA/PIO
 * Params   : host  - host
 *	      SCpnt - command
 */
static void
eesoxscsi_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp)
{
	struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
	if (info->info.scsi.dma != NO_DMA)
		disable_dma(info->info.scsi.dma);
}

/* Prototype: const char *eesoxscsi_info(struct Scsi_Host * host)
 * Purpose  : returns a descriptive string about this interface,
 * Params   : host - driver host structure to return info for.
 * Returns  : pointer to a static buffer containing null terminated string.
 */
const char *eesoxscsi_info(struct Scsi_Host *host)
{
	struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
	static char string[150];

	sprintf(string, "%s (%s) in slot %d v%s terminators o%s",
		host->hostt->name, info->info.scsi.type, info->ec->slot_no,
		VERSION, info->control & EESOX_TERM_ENABLE ? "n" : "ff");

	return string;
}

/* Prototype: int eesoxscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
 * Purpose  : Set a driver specific function
 * Params   : host   - host to setup
 *          : buffer - buffer containing string describing operation
 *          : length - length of string
 * Returns  : -EINVAL, or 0
 */
static int
eesoxscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
{
	int ret = length;

	if (length >= 9 && strncmp(buffer, "EESOXSCSI", 9) == 0) {
		buffer += 9;
		length -= 9;

		if (length >= 5 && strncmp(buffer, "term=", 5) == 0) {
			if (buffer[5] == '1')
				eesoxscsi_terminator_ctl(host, 1);
			else if (buffer[5] == '0')
				eesoxscsi_terminator_ctl(host, 0);
			else
				ret = -EINVAL;
		} else
			ret = -EINVAL;
	} else
		ret = -EINVAL;

	return ret;
}

/* Prototype: int eesoxscsi_proc_info(char *buffer, char **start, off_t offset,
 *				      int length, int host_no, int inout)
 * Purpose  : Return information about the driver to a user process accessing
 *	      the /proc filesystem.
 * Params   : buffer - a buffer to write information to
 *	      start  - a pointer into this buffer set by this routine to the start
 *		       of the required information.
 *	      offset - offset into information that we have read upto.
 *	      length - length of buffer
 *	      host_no - host number to return information for
 *	      inout  - 0 for reading, 1 for writing.
 * Returns  : length of data written to buffer.
 */
int eesoxscsi_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset,
			    int length, int inout)
{
	struct eesoxscsi_info *info;
	char *p = buffer;
	int pos;

	if (inout == 1)
		return eesoxscsi_set_proc_info(host, buffer, length);

	info = (struct eesoxscsi_info *)host->hostdata;

	p += sprintf(p, "EESOX SCSI driver v%s\n", VERSION);
	p += fas216_print_host(&info->info, p);
	p += sprintf(p, "Term    : o%s\n",
			info->control & EESOX_TERM_ENABLE ? "n" : "ff");

	p += fas216_print_stats(&info->info, p);
	p += fas216_print_devices(&info->info, p);

	*start = buffer + offset;
	pos = p - buffer - offset;
	if (pos > length)
		pos = length;

	return pos;
}

static ssize_t eesoxscsi_show_term(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct expansion_card *ec = ECARD_DEV(dev);
	struct Scsi_Host *host = ecard_get_drvdata(ec);
	struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;

	return sprintf(buf, "%d\n", info->control & EESOX_TERM_ENABLE ? 1 : 0);
}

static ssize_t eesoxscsi_store_term(struct device *dev, struct device_attribute *attr, const char *buf, size_t len)
{
	struct expansion_card *ec = ECARD_DEV(dev);
	struct Scsi_Host *host = ecard_get_drvdata(ec);
	struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;
	unsigned long flags;

	if (len > 1) {
		spin_lock_irqsave(host->host_lock, flags);
		if (buf[0] != '0') {
			info->control |= EESOX_TERM_ENABLE;
		} else {
			info->control &= ~EESOX_TERM_ENABLE;
		}
		writeb(info->control, info->ctl_port);
		spin_unlock_irqrestore(host->host_lock, flags);
	}

	return len;
}

static DEVICE_ATTR(bus_term, S_IRUGO | S_IWUSR,
		   eesoxscsi_show_term, eesoxscsi_store_term);

static struct scsi_host_template eesox_template = {
	.module				= THIS_MODULE,
	.proc_info			= eesoxscsi_proc_info,
	.name				= "EESOX SCSI",
	.info				= eesoxscsi_info,
	.queuecommand			= fas216_queue_command,
	.eh_host_reset_handler		= fas216_eh_host_reset,
	.eh_bus_reset_handler		= fas216_eh_bus_reset,
	.eh_device_reset_handler	= fas216_eh_device_reset,
	.eh_abort_handler		= fas216_eh_abort,
	.can_queue			= 1,
	.this_id			= 7,
	.sg_tablesize			= SG_ALL,
	.cmd_per_lun			= 1,
	.use_clustering			= DISABLE_CLUSTERING,
	.proc_name			= "eesox",
};

static int __devinit
eesoxscsi_probe(struct expansion_card *ec, const struct ecard_id *id)
{
	struct Scsi_Host *host;
	struct eesoxscsi_info *info;
	unsigned long resbase, reslen;
	void __iomem *base;
	int ret;

	ret = ecard_request_resources(ec);
	if (ret)
		goto out;

	resbase = ecard_resource_start(ec, ECARD_RES_IOCFAST);
	reslen = ecard_resource_len(ec, ECARD_RES_IOCFAST);
	base = ioremap(resbase, reslen);
	if (!base) {
		ret = -ENOMEM;
		goto out_region;
	}

	host = scsi_host_alloc(&eesox_template,
			       sizeof(struct eesoxscsi_info));
	if (!host) {
		ret = -ENOMEM;
		goto out_unmap;
	}

	ecard_set_drvdata(ec, host);

	info = (struct eesoxscsi_info *)host->hostdata;
	info->ec	= ec;
	info->base	= base;
	info->ctl_port	= base + EESOX_CONTROL;
	info->control	= term[ec->slot_no] ? EESOX_TERM_ENABLE : 0;
	writeb(info->control, info->ctl_port);

	info->info.scsi.io_base		= base + EESOX_FAS216_OFFSET;
	info->info.scsi.io_shift	= EESOX_FAS216_SHIFT;
	info->info.scsi.irq		= ec->irq;
	info->info.scsi.dma		= ec->dma;
	info->info.ifcfg.clockrate	= 40; /* MHz */
	info->info.ifcfg.select_timeout	= 255;
	info->info.ifcfg.asyncperiod	= 200; /* ns */
	info->info.ifcfg.sync_max_depth	= 7;
	info->info.ifcfg.cntl3		= CNTL3_FASTSCSI | CNTL3_FASTCLK;
	info->info.ifcfg.disconnect_ok	= 1;
	info->info.ifcfg.wide_max_size	= 0;
	info->info.ifcfg.capabilities	= FASCAP_PSEUDODMA;
	info->info.dma.setup		= eesoxscsi_dma_setup;
	info->info.dma.pseudo		= eesoxscsi_dma_pseudo;
	info->info.dma.stop		= eesoxscsi_dma_stop;

	ec->irqaddr	= base + EESOX_DMASTAT;
	ec->irqmask	= EESOX_STAT_INTR;
	ec->irq_data	= info;
	ec->ops		= &eesoxscsi_ops;

	device_create_file(&ec->dev, &dev_attr_bus_term);

	ret = fas216_init(host);
	if (ret)
		goto out_free;

	ret = request_irq(ec->irq, eesoxscsi_intr, 0, "eesoxscsi", info);
	if (ret) {
		printk("scsi%d: IRQ%d not free: %d\n",
		       host->host_no, ec->irq, ret);
		goto out_remove;
	}

	if (info->info.scsi.dma != NO_DMA) {
		if (request_dma(info->info.scsi.dma, "eesox")) {
			printk("scsi%d: DMA%d not free, DMA disabled\n",
			       host->host_no, info->info.scsi.dma);
			info->info.scsi.dma = NO_DMA;
		} else {
			set_dma_speed(info->info.scsi.dma, 180);
			info->info.ifcfg.capabilities |= FASCAP_DMA;
			info->info.ifcfg.cntl3 |= CNTL3_BS8;
		}
	}

	ret = fas216_add(host, &ec->dev);
	if (ret == 0)
		goto out;

	if (info->info.scsi.dma != NO_DMA)
		free_dma(info->info.scsi.dma);
	free_irq(ec->irq, host);

 out_remove:
	fas216_remove(host);

 out_free:
	device_remove_file(&ec->dev, &dev_attr_bus_term);
	scsi_host_put(host);

 out_unmap:
	iounmap(base);

 out_region:
	ecard_release_resources(ec);

 out:
	return ret;
}

static void __devexit eesoxscsi_remove(struct expansion_card *ec)
{
	struct Scsi_Host *host = ecard_get_drvdata(ec);
	struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;

	ecard_set_drvdata(ec, NULL);
	fas216_remove(host);

	if (info->info.scsi.dma != NO_DMA)
		free_dma(info->info.scsi.dma);
	free_irq(ec->irq, info);

	device_remove_file(&ec->dev, &dev_attr_bus_term);

	iounmap(info->base);

	fas216_release(host);
	scsi_host_put(host);
	ecard_release_resources(ec);
}

static const struct ecard_id eesoxscsi_cids[] = {
	{ MANU_EESOX, PROD_EESOX_SCSI2 },
	{ 0xffff, 0xffff },
};

static struct ecard_driver eesoxscsi_driver = {
	.probe		= eesoxscsi_probe,
	.remove		= __devexit_p(eesoxscsi_remove),
	.id_table	= eesoxscsi_cids,
	.drv = {
		.name		= "eesoxscsi",
	},
};

static int __init eesox_init(void)
{
	return ecard_register_driver(&eesoxscsi_driver);
}

static void __exit eesox_exit(void)
{
	ecard_remove_driver(&eesoxscsi_driver);
}

module_init(eesox_init);
module_exit(eesox_exit);

MODULE_AUTHOR("Russell King");
MODULE_DESCRIPTION("EESOX 'Fast' SCSI driver for Acorn machines");
MODULE_PARM(term, "1-8i");
MODULE_PARM_DESC(term, "SCSI bus termination");
MODULE_LICENSE("GPL");