static int pata_buddha_probe()

in pata_buddha.c [150:247]

• 78 lines of code
• 14 McCabe index (conditional complexity)

static int pata_buddha_probe(struct zorro_dev *z,
			     const struct zorro_device_id *ent)
{
	static const char * const board_name[] = {
		"Buddha", "Catweasel", "X-Surf"
	};
	struct ata_host *host;
	void __iomem *buddha_board;
	unsigned long board;
	unsigned int type = ent->driver_data;
	unsigned int nr_ports = (type == BOARD_CATWEASEL) ? 3 : 2;
	void *old_drvdata;
	int i;

	dev_info(&z->dev, "%s IDE controller\n", board_name[type]);

	board = z->resource.start;

	if (type != BOARD_XSURF) {
		if (!devm_request_mem_region(&z->dev,
					     board + BUDDHA_BASE1,
					     0x800, DRV_NAME))
			return -ENXIO;
	} else {
		if (!devm_request_mem_region(&z->dev,
					     board + XSURF_BASE1,
					     0x1000, DRV_NAME))
			return -ENXIO;
		if (!devm_request_mem_region(&z->dev,
					     board + XSURF_BASE2,
					     0x1000, DRV_NAME)) {
		}
	}

	/* Workaround for X-Surf: Save drvdata in case zorro8390 has set it */
	if (type == BOARD_XSURF)
		old_drvdata = dev_get_drvdata(&z->dev);

	/* allocate host */
	host = ata_host_alloc(&z->dev, nr_ports);
	if (type == BOARD_XSURF)
		dev_set_drvdata(&z->dev, old_drvdata);
	if (!host)
		return -ENXIO;

	buddha_board = ZTWO_VADDR(board);

	/* enable the board IRQ on Buddha/Catweasel */
	if (type != BOARD_XSURF)
		z_writeb(0, buddha_board + BUDDHA_IRQ_MR);

	for (i = 0; i < nr_ports; i++) {
		struct ata_port *ap = host->ports[i];
		void __iomem *base, *irqport;
		unsigned long ctl = 0;

		if (type != BOARD_XSURF) {
			ap->ops = &pata_buddha_ops;
			base = buddha_board + buddha_bases[i];
			ctl = BUDDHA_CONTROL;
			irqport = buddha_board + BUDDHA_IRQ + i * 0x40;
		} else {
			ap->ops = &pata_xsurf_ops;
			base = buddha_board + xsurf_bases[i];
			/* X-Surf has no CS1* (Control/AltStat) */
			irqport = buddha_board + XSURF_IRQ;
		}

		ap->pio_mask = ATA_PIO4;
		ap->flags |= ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY;

		ap->ioaddr.data_addr		= base;
		ap->ioaddr.error_addr		= base + 2 + 1 * 4;
		ap->ioaddr.feature_addr		= base + 2 + 1 * 4;
		ap->ioaddr.nsect_addr		= base + 2 + 2 * 4;
		ap->ioaddr.lbal_addr		= base + 2 + 3 * 4;
		ap->ioaddr.lbam_addr		= base + 2 + 4 * 4;
		ap->ioaddr.lbah_addr		= base + 2 + 5 * 4;
		ap->ioaddr.device_addr		= base + 2 + 6 * 4;
		ap->ioaddr.status_addr		= base + 2 + 7 * 4;
		ap->ioaddr.command_addr		= base + 2 + 7 * 4;

		if (ctl) {
			ap->ioaddr.altstatus_addr = base + ctl;
			ap->ioaddr.ctl_addr	  = base + ctl;
		}

		ap->private_data = (void *)irqport;

		ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", board,
			      ctl ? board + buddha_bases[i] + ctl : 0);
	}

	ata_host_activate(host, IRQ_AMIGA_PORTS, ata_sff_interrupt,
			  IRQF_SHARED, &pata_buddha_sht);

	return 0;
}