--- /dev/null
+/*
+ * pata_ns87410.c - National Semiconductor 87410 PATA for new ATA layer
+ * (C) 2006 Red Hat Inc
+ * Alan Cox <alan@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * 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; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#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_ns87410"
+#define DRV_VERSION "0.4.3"
+
+/**
+ * ns87410_pre_reset - probe begin
+ * @ap: ATA port
+ *
+ * Set up cable type and use generic probe init
+ */
+
+static int ns87410_pre_reset(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ static const struct pci_bits ns87410_enable_bits[] = {
+ { 0x43, 1, 0x08, 0x08 },
+ { 0x47, 1, 0x08, 0x08 }
+ };
+
+ if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no]))
+ return -ENOENT;
+ ap->cbl = ATA_CBL_PATA40;
+ return ata_std_prereset(ap);
+}
+
+/**
+ * ns87410_error_handler - probe reset
+ * @ap: ATA port
+ *
+ * Perform the ATA probe and bus reset sequence plus specific handling
+ * for this hardware. The MPIIX has the enable bits in a different place
+ * to PIIX4 and friends. As a pure PIO device it has no cable detect
+ */
+
+static void ns87410_error_handler(struct ata_port *ap)
+{
+ ata_bmdma_drive_eh(ap, ns87410_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
+}
+
+/**
+ * ns87410_set_piomode - set initial PIO mode data
+ * @ap: ATA interface
+ * @adev: ATA device
+ *
+ * Program timing data. This is kept per channel not per device,
+ * and only affects the data port.
+ */
+
+static void ns87410_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ int port = 0x40 + 4 * ap->port_no;
+ u8 idetcr, idefr;
+ struct ata_timing at;
+
+ static const u8 activebits[15] = {
+ 0, 1, 2, 3, 4,
+ 5, 5, 6, 6, 6,
+ 6, 7, 7, 7, 7
+ };
+
+ static const u8 recoverbits[12] = {
+ 0, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7
+ };
+
+ pci_read_config_byte(pdev, port + 3, &idefr);
+
+ if (ata_pio_need_iordy(adev))
+ idefr |= 0x04; /* IORDY enable */
+ else
+ idefr &= ~0x04;
+
+ if (ata_timing_compute(adev, adev->pio_mode, &at, 30303, 1) < 0) {
+ dev_printk(KERN_ERR, &pdev->dev, "unknown mode %d.\n", adev->pio_mode);
+ return;
+ }
+
+ at.active = FIT(at.active, 2, 16) - 2;
+ at.setup = FIT(at.setup, 1, 4) - 1;
+ at.recover = FIT(at.recover, 1, 12) - 1;
+
+ idetcr = (at.setup << 6) | (recoverbits[at.recover] << 3) | activebits[at.active];
+
+ pci_write_config_byte(pdev, port, idetcr);
+ pci_write_config_byte(pdev, port + 3, idefr);
+ /* We use ap->private_data as a pointer to the device currently
+ loaded for timing */
+ ap->private_data = adev;
+}
+
+/**
+ * ns87410_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.
+ */
+
+static unsigned int ns87410_qc_issue_prot(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ struct ata_device *adev = qc->dev;
+
+ /* If modes have been configured and the channel data is not loaded
+ then load it. We have to check if pio_mode is set as the core code
+ does not set adev->pio_mode to XFER_PIO_0 while probing as would be
+ logical */
+
+ if (adev->pio_mode && adev != ap->private_data)
+ ns87410_set_piomode(ap, adev);
+
+ return ata_qc_issue_prot(qc);
+}
+
+static struct scsi_host_template ns87410_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 ns87410_port_ops = {
+ .port_disable = ata_port_disable,
+ .set_piomode = ns87410_set_piomode,
+
+ .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 = ns87410_error_handler,
+ .post_internal_cmd = ata_bmdma_post_internal_cmd,
+
+ .qc_prep = ata_qc_prep,
+ .qc_issue = ns87410_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 ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ static struct ata_port_info info = {
+ .sht = &ns87410_sht,
+ .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+ .pio_mask = 0x0F,
+ .port_ops = &ns87410_port_ops
+ };
+ static struct ata_port_info *port_info[2] = {&info, &info};
+ return ata_pci_init_one(dev, port_info, 2);
+}
+
+static const struct pci_device_id ns87410[] = {
+ { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), },
+
+ { },
+};
+
+static struct pci_driver ns87410_pci_driver = {
+ .name = DRV_NAME,
+ .id_table = ns87410,
+ .probe = ns87410_init_one,
+ .remove = ata_pci_remove_one,
+#ifdef CONFIG_PM
+ .suspend = ata_pci_device_suspend,
+ .resume = ata_pci_device_resume,
+#endif
+};
+
+static int __init ns87410_init(void)
+{
+ return pci_register_driver(&ns87410_pci_driver);
+}
+
+static void __exit ns87410_exit(void)
+{
+ pci_unregister_driver(&ns87410_pci_driver);
+}
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("low-level driver for Nat Semi 87410");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, ns87410);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(ns87410_init);
+module_exit(ns87410_exit);
git://git.onelab.eu / linux-2.6.git / blobdiff