// SPDX-License-Identifier: GPL-2.0-only /* * pata_ninja32.c - Ninja32 PATA for new ATA layer * (C) 2007 Red Hat Inc * * Note: The controller like many controllers has shared timings for * PIO and DMA. We thus flip to the DMA timings in dma_start and flip back * in the dma_stop function. Thus we actually don't need a set_dmamode * method as the PIO method is always called and will set the right PIO * timing parameters. * * The Ninja32 Cardbus is not a generic SFF controller. Instead it is * laid out as follows off BAR 0. This is based upon Mark Lord's delkin * driver and the extensive analysis done by the BSD developers, notably * ITOH Yasufumi. * * Base + 0x00 IRQ Status * Base + 0x01 IRQ control * Base + 0x02 Chipset control * Base + 0x03 Unknown * Base + 0x04 VDMA and reset control + wait bits * Base + 0x08 BMIMBA * Base + 0x0C DMA Length * Base + 0x10 Taskfile * Base + 0x18 BMDMA Status ? * Base + 0x1C * Base + 0x1D Bus master control * bit 0 = enable * bit 1 = 0 write/1 read * bit 2 = 1 sgtable * bit 3 = go * bit 4-6 wait bits * bit 7 = done * Base + 0x1E AltStatus * Base + 0x1F timing register
*/
/** * ninja32_set_piomode - set initial PIO mode data * @ap: ATA interface * @adev: ATA device * * Called to do the PIO mode setup. Our timing registers are shared * but we want to set the PIO timing by default.
*/
host = ata_host_alloc(&dev->dev, 1); if (!host) return -ENOMEM;
ap = host->ports[0];
/* Set up the PCI device */
rc = pcim_enable_device(dev); if (rc) return rc;
rc = pcim_iomap_regions(dev, 1 << 0, DRV_NAME); if (rc == -EBUSY)
pcim_pin_device(dev); if (rc) return rc;
/* Set up the register mappings. We use the I/O mapping as only the
older chips also have MMIO on BAR 1 */
base = host->iomap[0]; if (!base) return -ENOMEM;
ap->ops = &ninja32_port_ops;
ap->pio_mask = ATA_PIO4;
ap->flags |= ATA_FLAG_SLAVE_POSS;
ap->ioaddr.cmd_addr = base + 0x10;
ap->ioaddr.ctl_addr = base + 0x1E;
ap->ioaddr.altstatus_addr = base + 0x1E;
ap->ioaddr.bmdma_addr = base;
ata_sff_std_ports(&ap->ioaddr);
ap->pflags |= ATA_PFLAG_PIO32 | ATA_PFLAG_PIO32CHANGE;
ninja32_program(base); /* FIXME: Should we disable them at remove ? */ return ata_host_activate(host, dev->irq, ata_bmdma_interrupt,
IRQF_SHARED, &ninja32_sht);
}
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