2 * pata_ns87410.c - National Semiconductor 87410 PATA for new ATA layer
4 * Alan Cox <alan@redhat.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/pci.h>
24 #include <linux/init.h>
25 #include <linux/blkdev.h>
26 #include <linux/delay.h>
27 #include <scsi/scsi_host.h>
28 #include <linux/libata.h>
30 #define DRV_NAME "pata_ns87410"
31 #define DRV_VERSION "0.4.6"
34 * ns87410_pre_reset - probe begin
36 * @deadline: deadline jiffies for the operation
41 static int ns87410_pre_reset(struct ata_link *link, unsigned long deadline)
43 struct ata_port *ap = link->ap;
44 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
45 static const struct pci_bits ns87410_enable_bits[] = {
46 { 0x43, 1, 0x08, 0x08 },
47 { 0x47, 1, 0x08, 0x08 }
50 if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no]))
53 return ata_std_prereset(link, deadline);
57 * ns87410_error_handler - probe reset
60 * Perform the ATA probe and bus reset sequence plus specific handling
61 * for this hardware. The MPIIX has the enable bits in a different place
62 * to PIIX4 and friends. As a pure PIO device it has no cable detect
65 static void ns87410_error_handler(struct ata_port *ap)
67 ata_bmdma_drive_eh(ap, ns87410_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
71 * ns87410_set_piomode - set initial PIO mode data
75 * Program timing data. This is kept per channel not per device,
76 * and only affects the data port.
79 static void ns87410_set_piomode(struct ata_port *ap, struct ata_device *adev)
81 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
82 int port = 0x40 + 4 * ap->port_no;
86 static const u8 activebits[15] = {
92 static const u8 recoverbits[12] = {
93 0, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7
96 pci_read_config_byte(pdev, port + 3, &idefr);
98 if (ata_pio_need_iordy(adev))
99 idefr |= 0x04; /* IORDY enable */
103 if (ata_timing_compute(adev, adev->pio_mode, &at, 30303, 1) < 0) {
104 dev_printk(KERN_ERR, &pdev->dev, "unknown mode %d.\n", adev->pio_mode);
108 at.active = FIT(at.active, 2, 16) - 2;
109 at.setup = FIT(at.setup, 1, 4) - 1;
110 at.recover = FIT(at.recover, 1, 12) - 1;
112 idetcr = (at.setup << 6) | (recoverbits[at.recover] << 3) | activebits[at.active];
114 pci_write_config_byte(pdev, port, idetcr);
115 pci_write_config_byte(pdev, port + 3, idefr);
116 /* We use ap->private_data as a pointer to the device currently
118 ap->private_data = adev;
122 * ns87410_qc_issue_prot - command issue
123 * @qc: command pending
125 * Called when the libata layer is about to issue a command. We wrap
126 * this interface so that we can load the correct ATA timings if
130 static unsigned int ns87410_qc_issue_prot(struct ata_queued_cmd *qc)
132 struct ata_port *ap = qc->ap;
133 struct ata_device *adev = qc->dev;
135 /* If modes have been configured and the channel data is not loaded
136 then load it. We have to check if pio_mode is set as the core code
137 does not set adev->pio_mode to XFER_PIO_0 while probing as would be
140 if (adev->pio_mode && adev != ap->private_data)
141 ns87410_set_piomode(ap, adev);
143 return ata_qc_issue_prot(qc);
146 static struct scsi_host_template ns87410_sht = {
147 ATA_PIO_SHT(DRV_NAME),
150 static struct ata_port_operations ns87410_port_ops = {
151 .inherits = &ata_sff_port_ops,
152 .qc_issue = ns87410_qc_issue_prot,
153 .cable_detect = ata_cable_40wire,
154 .set_piomode = ns87410_set_piomode,
155 .error_handler = ns87410_error_handler,
158 static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id)
160 static const struct ata_port_info info = {
161 .flags = ATA_FLAG_SLAVE_POSS,
163 .port_ops = &ns87410_port_ops
165 const struct ata_port_info *ppi[] = { &info, NULL };
166 return ata_pci_init_one(dev, ppi, &ns87410_sht);
169 static const struct pci_device_id ns87410[] = {
170 { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), },
175 static struct pci_driver ns87410_pci_driver = {
178 .probe = ns87410_init_one,
179 .remove = ata_pci_remove_one,
181 .suspend = ata_pci_device_suspend,
182 .resume = ata_pci_device_resume,
186 static int __init ns87410_init(void)
188 return pci_register_driver(&ns87410_pci_driver);
191 static void __exit ns87410_exit(void)
193 pci_unregister_driver(&ns87410_pci_driver);
196 MODULE_AUTHOR("Alan Cox");
197 MODULE_DESCRIPTION("low-level driver for Nat Semi 87410");
198 MODULE_LICENSE("GPL");
199 MODULE_DEVICE_TABLE(pci, ns87410);
200 MODULE_VERSION(DRV_VERSION);
202 module_init(ns87410_init);
203 module_exit(ns87410_exit);