static int amd_init_one()

in pata_amd.c [458:576]

• 101 lines of code
• 11 McCabe index (conditional complexity)

static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
{
	static const struct ata_port_info info[10] = {
		{	/* 0: AMD 7401 - no swdma */
			.flags = ATA_FLAG_SLAVE_POSS,
			.pio_mask = ATA_PIO4,
			.mwdma_mask = ATA_MWDMA2,
			.udma_mask = ATA_UDMA2,
			.port_ops = &amd33_port_ops
		},
		{	/* 1: Early AMD7409 - no swdma */
			.flags = ATA_FLAG_SLAVE_POSS,
			.pio_mask = ATA_PIO4,
			.mwdma_mask = ATA_MWDMA2,
			.udma_mask = ATA_UDMA4,
			.port_ops = &amd66_port_ops
		},
		{	/* 2: AMD 7409 */
			.flags = ATA_FLAG_SLAVE_POSS,
			.pio_mask = ATA_PIO4,
			.mwdma_mask = ATA_MWDMA2,
			.udma_mask = ATA_UDMA4,
			.port_ops = &amd66_port_ops
		},
		{	/* 3: AMD 7411 */
			.flags = ATA_FLAG_SLAVE_POSS,
			.pio_mask = ATA_PIO4,
			.mwdma_mask = ATA_MWDMA2,
			.udma_mask = ATA_UDMA5,
			.port_ops = &amd100_port_ops
		},
		{	/* 4: AMD 7441 */
			.flags = ATA_FLAG_SLAVE_POSS,
			.pio_mask = ATA_PIO4,
			.mwdma_mask = ATA_MWDMA2,
			.udma_mask = ATA_UDMA5,
			.port_ops = &amd100_port_ops
		},
		{	/* 5: AMD 8111 - no swdma */
			.flags = ATA_FLAG_SLAVE_POSS,
			.pio_mask = ATA_PIO4,
			.mwdma_mask = ATA_MWDMA2,
			.udma_mask = ATA_UDMA6,
			.port_ops = &amd133_port_ops
		},
		{	/* 6: AMD 8111 UDMA 100 (Serenade) - no swdma */
			.flags = ATA_FLAG_SLAVE_POSS,
			.pio_mask = ATA_PIO4,
			.mwdma_mask = ATA_MWDMA2,
			.udma_mask = ATA_UDMA5,
			.port_ops = &amd133_port_ops
		},
		{	/* 7: Nvidia Nforce */
			.flags = ATA_FLAG_SLAVE_POSS,
			.pio_mask = ATA_PIO4,
			.mwdma_mask = ATA_MWDMA2,
			.udma_mask = ATA_UDMA5,
			.port_ops = &nv100_port_ops
		},
		{	/* 8: Nvidia Nforce2 and later - no swdma */
			.flags = ATA_FLAG_SLAVE_POSS,
			.pio_mask = ATA_PIO4,
			.mwdma_mask = ATA_MWDMA2,
			.udma_mask = ATA_UDMA6,
			.port_ops = &nv133_port_ops
		},
		{	/* 9: AMD CS5536 (Geode companion) */
			.flags = ATA_FLAG_SLAVE_POSS,
			.pio_mask = ATA_PIO4,
			.mwdma_mask = ATA_MWDMA2,
			.udma_mask = ATA_UDMA5,
			.port_ops = &amd100_port_ops
		}
	};
	const struct ata_port_info *ppi[] = { NULL, NULL };
	int type = id->driver_data;
	void *hpriv = NULL;
	u8 fifo;
	int rc;

	ata_print_version_once(&pdev->dev, DRV_VERSION);

	rc = pcim_enable_device(pdev);
	if (rc)
		return rc;

	pci_read_config_byte(pdev, 0x41, &fifo);

	/* Check for AMD7409 without swdma errata and if found adjust type */
	if (type == 1 && pdev->revision > 0x7)
		type = 2;

	/* Serenade ? */
	if (type == 5 && pdev->subsystem_vendor == PCI_VENDOR_ID_AMD &&
			 pdev->subsystem_device == PCI_DEVICE_ID_AMD_SERENADE)
		type = 6;	/* UDMA 100 only */

	/*
	 * Okay, type is determined now.  Apply type-specific workarounds.
	 */
	ppi[0] = &info[type];

	if (type < 3)
		ata_pci_bmdma_clear_simplex(pdev);
	if (pdev->vendor == PCI_VENDOR_ID_AMD)
		amd_clear_fifo(pdev);
	/* Cable detection on Nvidia chips doesn't work too well,
	 * cache BIOS programmed UDMA mode.
	 */
	if (type == 7 || type == 8) {
		u32 udma;

		pci_read_config_dword(pdev, 0x60, &udma);
		hpriv = (void *)(unsigned long)udma;
	}

	/* And fire it up */
	return ata_pci_bmdma_init_one(pdev, ppi, &amd_sht, hpriv, 0);
}