/* * pata_ns87410.c - National Semiconductor 87410 PATA for new ATA layer * (C) 2006 Red Hat Inc * * 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_sff_prereset(link, deadline); } /** * 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 = clamp_val(at.active, 2, 16) - 2; at.setup = clamp_val(at.setup, 1, 4) - 1; at.recover = clamp_val(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 - 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(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_sff_qc_issue(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, .cable_detect = ata_cable_40wire, .set_piomode = ns87410_set_piomode, .prereset = ns87410_pre_reset, }; static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id) { static const struct ata_port_info info = { .flags = ATA_FLAG_SLAVE_POSS, .pio_mask = 0x0F, .port_ops = &ns87410_port_ops }; const struct ata_port_info *ppi[] = { &info, NULL }; return ata_pci_sff_init_one(dev, ppi, &ns87410_sht, NULL); } 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);