linux-imx
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slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << (ap->port_no ? 4 : 0);/* * pata_it8213.c - iTE Tech. Inc. IT8213 PATA driver * * The IT8213 is a very Intel ICH like device for timing purposes, having * a similar register layout and the same split clock arrangement. Cable * detection is different, and it does not have slave channels or all the * clutter of later ICH/SATA setups. *//** * it8213_pre_reset - probe begin * @link: link * @deadline: deadline jiffies for the operation * * Filter out ports by the enable bits before doing the normal reset * and probe. */static int it8213_pre_reset(struct ata_link *link, unsigned long deadline){ static const struct pci_bits it8213_enable_bits[] = { { 0x41U, 1U, 0x80UL, 0x80UL }, /* port 0 */ }; struct ata_port *ap = link->ap; struct pci_dev *pdev = to_pci_dev(ap->host->dev); if (!pci_test_config_bits(pdev, &it8213_enable_bits[ap->port_no])) return -ENOENT; return ata_sff_prereset(link, deadline);}/** * it8213_cable_detect - check for 40/80 pin * @ap: Port * * Perform cable detection for the 8213 ATA interface. This is * different to the PIIX arrangement */static int it8213_cable_detect(struct ata_port *ap){ struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 tmp; pci_read_config_byte(pdev, 0x42, &tmp); if (tmp & 2) /* The initial docs are incorrect */ return ATA_CBL_PATA40; return ATA_CBL_PATA80;}/** * it8213_set_piomode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: Device whose timings we are configuring * * Set PIO mode for device, in host controller PCI config space. * * LOCKING: * None (inherited from caller). */static void it8213_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; u16 master_data; int control = 0; /* * See Intel Document 298600-004 for the timing programing rules * for PIIX/ICH. The 8213 is a clone so very similar */ static const /* ISP RTC */ u8 timings[][2] = { { 0, 0 }, { 0, 0 }, { 1, 0 }, { 2, 1 }, { 2, 3 }, };