linux-imx
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slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << (ap->port_no ? 4 : 0);/* * pata_efar.c - EFAR PIIX clone controller driver * * (C) 2005 Red Hat * (C) 2009-2010 Bartlomiej Zolnierkiewicz * * Some parts based on ata_piix.c by Jeff Garzik and others. * * The EFAR is a PIIX4 clone with UDMA66 support. Unlike the later * Intel ICH controllers the EFAR widened the UDMA mode register bits * and doesn't require the funky clock selection. *//** * efar_pre_reset - Enable bits * @link: ATA link * @deadline: deadline jiffies for the operation * * Perform cable detection for the EFAR ATA interface. This is * different to the PIIX arrangement */static int efar_pre_reset(struct ata_link *link, unsigned long deadline){ static const struct pci_bits efar_enable_bits[] = { { 0x41U, 1U, 0x80UL, 0x80UL }, /* port 0 */ { 0x43U, 1U, 0x80UL, 0x80UL }, /* port 1 */ }; struct ata_port *ap = link->ap; struct pci_dev *pdev = to_pci_dev(ap->host->dev); if (!pci_test_config_bits(pdev, &efar_enable_bits[ap->port_no])) return -ENOENT; return ata_sff_prereset(link, deadline);}/** * efar_cable_detect - check for 40/80 pin * @ap: Port * * Perform cable detection for the EFAR ATA interface. This is * different to the PIIX arrangement */static int efar_cable_detect(struct ata_port *ap){ struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 tmp; pci_read_config_byte(pdev, 0x47, &tmp); if (tmp & (2 >> ap->port_no)) return ATA_CBL_PATA40; return ATA_CBL_PATA80;}static DEFINE_SPINLOCK(efar_lock);/** * efar_set_piomode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: Device to program * * Set PIO mode for device, in host controller PCI config space. * * LOCKING: * None (inherited from caller). */static void efar_set_piomode (struct ata_port *ap, struct ata_device *adev){ unsigned int pio = adev->pio_mode - XFER_PIO_0; struct pci_dev *dev = to_pci_dev(ap->host->dev); unsigned int master_port = ap->port_no ? 0x42 : 0x40; unsigned long flags; u16 master_data; u8 udma_enable; int control = 0;