| /* |
| * 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 "0.4.6" |
| |
| /** |
| * ns87410_pre_reset - probe begin |
| * @link: ATA link |
| * @deadline: deadline jiffies for the operation |
| * |
| * Check enabled ports |
| */ |
| |
| static int ns87410_pre_reset(struct ata_link *link, unsigned long deadline) |
| { |
| struct ata_port *ap = link->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; |
| |
| return ata_std_prereset(link, deadline); |
| } |
| |
| /** |
| * 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 |
| * necessary. |
| */ |
| |
| 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 = { |
| ATA_PIO_SHT(DRV_NAME), |
| }; |
| |
| static struct ata_port_operations ns87410_port_ops = { |
| .inherits = &ata_sff_port_ops, |
| .qc_issue = ns87410_qc_issue_prot, |
| .cable_detect = ata_cable_40wire, |
| .set_piomode = ns87410_set_piomode, |
| .error_handler = ns87410_error_handler, |
| }; |
| |
| static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id) |
| { |
| static const struct ata_port_info info = { |
| .sht = &ns87410_sht, |
| .flags = ATA_FLAG_SLAVE_POSS, |
| .pio_mask = 0x0F, |
| .port_ops = &ns87410_port_ops |
| }; |
| const struct ata_port_info *ppi[] = { &info, NULL }; |
| return ata_pci_init_one(dev, ppi); |
| } |
| |
| 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); |