u16 idetm_data;
int control = 0;
/*
* See Intel Document 298600-004 for the timing programing rules
* for PIIX/ICH. Note that the early PIIX does not have the slave
* timing port at 0x44.
*/
static const /* ISP RTC */
u8 timings[][2] = { { 0, 0 },
{ 0, 0 },
{ 1, 0 },
{ 2, 1 },
{ 2, 3 }, };
if (pio > 2)
control |= 1; /* TIME1 enable */
if (ata_pio_need_iordy(adev))
control |= 2; /* IE IORDY */
/* Intel specifies that the PPE functionality is for disk only */
if (adev->class == ATA_DEV_ATA)
control |= 4; /* PPE enable */
pci_read_config_word(dev, idetm_port, &idetm_data);
/* Enable PPE, IE and TIME as appropriate. Clear the other
drive timing bits */
if (adev->devno == 0) {
idetm_data &= 0xCCE0;
idetm_data |= control;
} else {
idetm_data &= 0xCC0E;
idetm_data |= (control << 4);
}
idetm_data |= (timings[pio][0] << 12) |
(timings[pio][1] << 8);
pci_write_config_word(dev, idetm_port, idetm_data);
/* Track which port is configured */
ap->private_data = adev;
}
/**
* oldpiix_set_dmamode - Initialize host controller PATA DMA timings
* @ap: Port whose timings we are configuring
* @adev: Device to program
* @isich: True if the device is an ICH and has IOCFG registers
*
* Set MWDMA mode for device, in host controller PCI config space.
*
* LOCKING:
* None (inherited from caller).
*/
/**
* oldpiix_qc_issue_prot - command issue
* @qc: command pending
*
* Called when the libata layer is about to issue a command. We wrap
* this interface so that we can load the correct ATA timings if
* neccessary. Our logic also clears TIME0/TIME1 for the other device so
* that, even if we get this wrong, cycles to the other device will
* be made PIO0.
*/
static int oldpiix_qc_issue_prot(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
struct ata_device *adev = qc->dev;
if (adev != ap->private_data) {
if (adev->dma_mode)
oldpiix_set_dmamode(ap, adev);
else if (adev->pio_mode)
oldpiix_set_piomode(ap, adev);
}
return ata_qc_issue_prot(qc);
}
static struct scsi_host_template oldpiix_sht = {
.module = THIS_MODULE,
.name = DRV_NAME,
.ioctl = ata_scsi_ioctl,
.queuecommand = ata_scsi_queuecmd,
.eh_strategy_handler = ata_scsi_error,
.can_queue = ATA_DEF_QUEUE,
.this_id = ATA_SHT_THIS_ID,
.sg_tablesize = LIBATA_MAX_PRD,
.max_sectors = ATA_MAX_SECTORS,
.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
.emulated = ATA_SHT_EMULATED,
.use_clustering = ATA_SHT_USE_CLUSTERING,
.proc_name = DRV_NAME,
.dma_boundary = ATA_DMA_BOUNDARY,
.slave_configure = ata_scsi_slave_config,
.bios_param = ata_std_bios_param,
.ordered_flush = 1,
};
static const struct ata_port_operations oldpiix_pata_ops = {
.port_disable = ata_port_disable,
.set_piomode = oldpiix_set_piomode,
.set_dmamode = oldpiix_set_dmamode,
.tf_load = ata_tf_load,
.tf_read = ata_tf_read,
.check_status = ata_check_status,
.exec_command = ata_exec_command,
.dev_select = ata_std_dev_select,
.phy_reset = oldpiix_pata_phy_reset,
.bmdma_setup = ata_bmdma_setup,
.bmdma_start = ata_bmdma_start,
.bmdma_stop = ata_bmdma_stop,
.bmdma_status = ata_bmdma_status,
.qc_prep = ata_qc_prep,
.qc_issue = oldpiix_qc_issue_prot,
.eng_timeout = ata_eng_timeout,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
.port_start = ata_port_start,
.port_stop = ata_port_stop,
.host_stop = ata_host_stop,
};
/**
* oldpiix_init_one - Register PIIX ATA PCI device with kernel services
* @pdev: PCI device to register
* @ent: Entry in oldpiix_pci_tbl matching with @pdev
*
* Called from kernel PCI layer.
*
* LOCKING:
* Inherited from PCI layer (may sleep).
*
* RETURNS:
* Zero on success, or -ERRNO value.
*/
static int oldpiix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
{
static int printed_version;
static struct ata_port_info info = {
.sht = &oldpiix_sht,
.host_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
.pio_mask = 0x1f, /* pio0-4 */
.mwdma_mask = 0x07, /* mwdma1-2 */
.port_ops = &oldpiix_pata_ops,
};
static struct ata_port_info *port_info[2] = { &info, &info };
if (!printed_version++)
dev_printk(KERN_DEBUG, &pdev->dev,
"version " DRV_VERSION "\n");
return ata_pci_init_one(pdev, port_info, 2);
}
static const struct pci_device_id oldpiix_pci_tbl[] = {
{ 0x8086, 0x1230, PCI_ANY_ID, PCI_ANY_ID, },
{ } /* terminate list */
};
static struct pci_driver oldpiix_pci_driver = {
.name = DRV_NAME,
.id_table = oldpiix_pci_tbl,
.probe = oldpiix_init_one,
.remove = ata_pci_remove_one,
};
static int __init oldpiix_init(void)
{
int rc;
DPRINTK("pci_module_init\n");
rc = pci_module_init(&oldpiix_pci_driver);
if (rc)
return rc;
DPRINTK("done\n");
return 0;
}
