286 lines
7.5 KiB
C
286 lines
7.5 KiB
C
/*
|
|
* pata_triflex.c - Compaq PATA for new ATA layer
|
|
* (C) 2005 Red Hat Inc
|
|
* Alan Cox <alan@redhat.com>
|
|
*
|
|
* based upon
|
|
*
|
|
* triflex.c
|
|
*
|
|
* IDE Chipset driver for the Compaq TriFlex IDE controller.
|
|
*
|
|
* Known to work with the Compaq Workstation 5x00 series.
|
|
*
|
|
* Copyright (C) 2002 Hewlett-Packard Development Group, L.P.
|
|
* Author: Torben Mathiasen <torben.mathiasen@hp.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* Loosely based on the piix & svwks drivers.
|
|
*
|
|
* Documentation:
|
|
* Not publically available.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/init.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/delay.h>
|
|
#include <scsi/scsi_host.h>
|
|
#include <linux/libata.h>
|
|
|
|
#define DRV_NAME "pata_triflex"
|
|
#define DRV_VERSION "0.2.8"
|
|
|
|
/**
|
|
* triflex_prereset - probe begin
|
|
* @link: ATA link
|
|
* @deadline: deadline jiffies for the operation
|
|
*
|
|
* Set up cable type and use generic probe init
|
|
*/
|
|
|
|
static int triflex_prereset(struct ata_link *link, unsigned long deadline)
|
|
{
|
|
static const struct pci_bits triflex_enable_bits[] = {
|
|
{ 0x80, 1, 0x01, 0x01 },
|
|
{ 0x80, 1, 0x02, 0x02 }
|
|
};
|
|
|
|
struct ata_port *ap = link->ap;
|
|
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
|
|
|
|
if (!pci_test_config_bits(pdev, &triflex_enable_bits[ap->port_no]))
|
|
return -ENOENT;
|
|
|
|
return ata_std_prereset(link, deadline);
|
|
}
|
|
|
|
|
|
|
|
static void triflex_error_handler(struct ata_port *ap)
|
|
{
|
|
ata_bmdma_drive_eh(ap, triflex_prereset, ata_std_softreset, NULL, ata_std_postreset);
|
|
}
|
|
|
|
/**
|
|
* triflex_load_timing - timing configuration
|
|
* @ap: ATA interface
|
|
* @adev: Device on the bus
|
|
* @speed: speed to configure
|
|
*
|
|
* The Triflex has one set of timings per device per channel. This
|
|
* means we must do some switching. As the PIO and DMA timings don't
|
|
* match we have to do some reloading unlike PIIX devices where tuning
|
|
* tricks can avoid it.
|
|
*/
|
|
|
|
static void triflex_load_timing(struct ata_port *ap, struct ata_device *adev, int speed)
|
|
{
|
|
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
|
|
u32 timing = 0;
|
|
u32 triflex_timing, old_triflex_timing;
|
|
int channel_offset = ap->port_no ? 0x74: 0x70;
|
|
unsigned int is_slave = (adev->devno != 0);
|
|
|
|
|
|
pci_read_config_dword(pdev, channel_offset, &old_triflex_timing);
|
|
triflex_timing = old_triflex_timing;
|
|
|
|
switch(speed)
|
|
{
|
|
case XFER_MW_DMA_2:
|
|
timing = 0x0103;break;
|
|
case XFER_MW_DMA_1:
|
|
timing = 0x0203;break;
|
|
case XFER_MW_DMA_0:
|
|
timing = 0x0808;break;
|
|
case XFER_SW_DMA_2:
|
|
case XFER_SW_DMA_1:
|
|
case XFER_SW_DMA_0:
|
|
timing = 0x0F0F;break;
|
|
case XFER_PIO_4:
|
|
timing = 0x0202;break;
|
|
case XFER_PIO_3:
|
|
timing = 0x0204;break;
|
|
case XFER_PIO_2:
|
|
timing = 0x0404;break;
|
|
case XFER_PIO_1:
|
|
timing = 0x0508;break;
|
|
case XFER_PIO_0:
|
|
timing = 0x0808;break;
|
|
default:
|
|
BUG();
|
|
}
|
|
triflex_timing &= ~ (0xFFFF << (16 * is_slave));
|
|
triflex_timing |= (timing << (16 * is_slave));
|
|
|
|
if (triflex_timing != old_triflex_timing)
|
|
pci_write_config_dword(pdev, channel_offset, triflex_timing);
|
|
}
|
|
|
|
/**
|
|
* triflex_set_piomode - set initial PIO mode data
|
|
* @ap: ATA interface
|
|
* @adev: ATA device
|
|
*
|
|
* Use the timing loader to set up the PIO mode. We have to do this
|
|
* because DMA start/stop will only be called once DMA occurs. If there
|
|
* has been no DMA then the PIO timings are still needed.
|
|
*/
|
|
static void triflex_set_piomode(struct ata_port *ap, struct ata_device *adev)
|
|
{
|
|
triflex_load_timing(ap, adev, adev->pio_mode);
|
|
}
|
|
|
|
/**
|
|
* triflex_dma_start - DMA start callback
|
|
* @qc: Command in progress
|
|
*
|
|
* Usually drivers set the DMA timing at the point the set_dmamode call
|
|
* is made. Triflex however requires we load new timings on the
|
|
* transition or keep matching PIO/DMA pairs (ie MWDMA2/PIO4 etc).
|
|
* We load the DMA timings just before starting DMA and then restore
|
|
* the PIO timing when the DMA is finished.
|
|
*/
|
|
|
|
static void triflex_bmdma_start(struct ata_queued_cmd *qc)
|
|
{
|
|
triflex_load_timing(qc->ap, qc->dev, qc->dev->dma_mode);
|
|
ata_bmdma_start(qc);
|
|
}
|
|
|
|
/**
|
|
* triflex_dma_stop - DMA stop callback
|
|
* @ap: ATA interface
|
|
* @adev: ATA device
|
|
*
|
|
* We loaded new timings in dma_start, as a result we need to restore
|
|
* the PIO timings in dma_stop so that the next command issue gets the
|
|
* right clock values.
|
|
*/
|
|
|
|
static void triflex_bmdma_stop(struct ata_queued_cmd *qc)
|
|
{
|
|
ata_bmdma_stop(qc);
|
|
triflex_load_timing(qc->ap, qc->dev, qc->dev->pio_mode);
|
|
}
|
|
|
|
static struct scsi_host_template triflex_sht = {
|
|
.module = THIS_MODULE,
|
|
.name = DRV_NAME,
|
|
.ioctl = ata_scsi_ioctl,
|
|
.queuecommand = ata_scsi_queuecmd,
|
|
.can_queue = ATA_DEF_QUEUE,
|
|
.this_id = ATA_SHT_THIS_ID,
|
|
.sg_tablesize = LIBATA_MAX_PRD,
|
|
.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,
|
|
.slave_destroy = ata_scsi_slave_destroy,
|
|
.bios_param = ata_std_bios_param,
|
|
};
|
|
|
|
static struct ata_port_operations triflex_port_ops = {
|
|
.set_piomode = triflex_set_piomode,
|
|
.mode_filter = ata_pci_default_filter,
|
|
|
|
.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,
|
|
|
|
.freeze = ata_bmdma_freeze,
|
|
.thaw = ata_bmdma_thaw,
|
|
.error_handler = triflex_error_handler,
|
|
.post_internal_cmd = ata_bmdma_post_internal_cmd,
|
|
.cable_detect = ata_cable_40wire,
|
|
|
|
.bmdma_setup = ata_bmdma_setup,
|
|
.bmdma_start = triflex_bmdma_start,
|
|
.bmdma_stop = triflex_bmdma_stop,
|
|
.bmdma_status = ata_bmdma_status,
|
|
|
|
.qc_prep = ata_qc_prep,
|
|
.qc_issue = ata_qc_issue_prot,
|
|
|
|
.data_xfer = ata_data_xfer,
|
|
|
|
.irq_handler = ata_interrupt,
|
|
.irq_clear = ata_bmdma_irq_clear,
|
|
.irq_on = ata_irq_on,
|
|
|
|
.port_start = ata_sff_port_start,
|
|
};
|
|
|
|
static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
|
|
{
|
|
static const struct ata_port_info info = {
|
|
.sht = &triflex_sht,
|
|
.flags = ATA_FLAG_SLAVE_POSS,
|
|
.pio_mask = 0x1f,
|
|
.mwdma_mask = 0x07,
|
|
.port_ops = &triflex_port_ops
|
|
};
|
|
const struct ata_port_info *ppi[] = { &info, NULL };
|
|
static int printed_version;
|
|
|
|
if (!printed_version++)
|
|
dev_printk(KERN_DEBUG, &dev->dev, "version " DRV_VERSION "\n");
|
|
|
|
return ata_pci_init_one(dev, ppi);
|
|
}
|
|
|
|
static const struct pci_device_id triflex[] = {
|
|
{ PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), },
|
|
|
|
{ },
|
|
};
|
|
|
|
static struct pci_driver triflex_pci_driver = {
|
|
.name = DRV_NAME,
|
|
.id_table = triflex,
|
|
.probe = triflex_init_one,
|
|
.remove = ata_pci_remove_one,
|
|
#ifdef CONFIG_PM
|
|
.suspend = ata_pci_device_suspend,
|
|
.resume = ata_pci_device_resume,
|
|
#endif
|
|
};
|
|
|
|
static int __init triflex_init(void)
|
|
{
|
|
return pci_register_driver(&triflex_pci_driver);
|
|
}
|
|
|
|
static void __exit triflex_exit(void)
|
|
{
|
|
pci_unregister_driver(&triflex_pci_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Alan Cox");
|
|
MODULE_DESCRIPTION("low-level driver for Compaq Triflex");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DEVICE_TABLE(pci, triflex);
|
|
MODULE_VERSION(DRV_VERSION);
|
|
|
|
module_init(triflex_init);
|
|
module_exit(triflex_exit);
|