--- /dev/null
+/*
+ * 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 "0.2.7"
+
+/**
+ * triflex_prereset - probe begin
+ * @ap: ATA port
+ *
+ * Set up cable type and use generic probe init
+ */
+
+static int triflex_prereset(struct ata_port *ap)
+{
+ static const struct pci_bits triflex_enable_bits[] = {
+ { 0x80, 1, 0x01, 0x01 },
+ { 0x80, 1, 0x02, 0x02 }
+ };
+
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+
+ if (!pci_test_config_bits(pdev, &triflex_enable_bits[ap->port_no]))
+ return -ENOENT;
+ ap->cbl = ATA_CBL_PATA40;
+ return ata_std_prereset(ap);
+}
+
+
+
+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,
+#ifdef CONFIG_PM
+ .resume = ata_scsi_device_resume,
+ .suspend = ata_scsi_device_suspend,
+#endif
+};
+
+static struct ata_port_operations triflex_port_ops = {
+ .port_disable = ata_port_disable,
+ .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,
+
+ .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_pio_data_xfer,
+
+ .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
+};
+
+static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ static struct ata_port_info info = {
+ .sht = &triflex_sht,
+ .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+ .pio_mask = 0x1f,
+ .mwdma_mask = 0x07,
+ .port_ops = &triflex_port_ops
+ };
+ static struct ata_port_info *port_info[2] = { &info, &info };
+ static int printed_version;
+
+ if (!printed_version++)
+ dev_printk(KERN_DEBUG, &dev->dev, "version " DRV_VERSION "\n");
+
+ return ata_pci_init_one(dev, port_info, 2);
+}
+
+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);
git://git.onelab.eu / linux-2.6.git / blobdiff