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Jeff Garzik669a5db2006-08-29 18:12:40 -04001/*
2 * pata_ns87410.c - National Semiconductor 87410 PATA for new ATA layer
3 * (C) 2006 Red Hat Inc
4 * Alan Cox <alan@redhat.com>
5 *
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)
9 * any later version.
10 *
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.
15 *
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.
19 */
20
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>
29
30#define DRV_NAME "pata_ns87410"
Jeff Garzika0fcdc02007-03-09 07:24:15 -050031#define DRV_VERSION "0.4.6"
Jeff Garzik669a5db2006-08-29 18:12:40 -040032
33/**
34 * ns87410_pre_reset - probe begin
Tejun Heocc0680a2007-08-06 18:36:23 +090035 * @link: ATA link
Tejun Heod4b2bab2007-02-02 16:50:52 +090036 * @deadline: deadline jiffies for the operation
Jeff Garzik669a5db2006-08-29 18:12:40 -040037 *
Jeff Garzika0fcdc02007-03-09 07:24:15 -050038 * Check enabled ports
Jeff Garzik669a5db2006-08-29 18:12:40 -040039 */
40
Tejun Heocc0680a2007-08-06 18:36:23 +090041static int ns87410_pre_reset(struct ata_link *link, unsigned long deadline)
Jeff Garzik669a5db2006-08-29 18:12:40 -040042{
Tejun Heocc0680a2007-08-06 18:36:23 +090043 struct ata_port *ap = link->ap;
Jeff Garzik669a5db2006-08-29 18:12:40 -040044 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 }
48 };
49
Alan Coxc9619222006-09-26 17:53:38 +010050 if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no]))
51 return -ENOENT;
Tejun Heod4b2bab2007-02-02 16:50:52 +090052
Tejun Heo9363c382008-04-07 22:47:16 +090053 return ata_sff_prereset(link, deadline);
Jeff Garzik669a5db2006-08-29 18:12:40 -040054}
55
56/**
Jeff Garzik669a5db2006-08-29 18:12:40 -040057 * ns87410_set_piomode - set initial PIO mode data
58 * @ap: ATA interface
59 * @adev: ATA device
60 *
61 * Program timing data. This is kept per channel not per device,
62 * and only affects the data port.
63 */
64
65static void ns87410_set_piomode(struct ata_port *ap, struct ata_device *adev)
66{
67 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
68 int port = 0x40 + 4 * ap->port_no;
69 u8 idetcr, idefr;
70 struct ata_timing at;
71
72 static const u8 activebits[15] = {
73 0, 1, 2, 3, 4,
74 5, 5, 6, 6, 6,
75 6, 7, 7, 7, 7
76 };
77
78 static const u8 recoverbits[12] = {
79 0, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7
80 };
81
82 pci_read_config_byte(pdev, port + 3, &idefr);
83
84 if (ata_pio_need_iordy(adev))
85 idefr |= 0x04; /* IORDY enable */
86 else
87 idefr &= ~0x04;
88
89 if (ata_timing_compute(adev, adev->pio_mode, &at, 30303, 1) < 0) {
90 dev_printk(KERN_ERR, &pdev->dev, "unknown mode %d.\n", adev->pio_mode);
91 return;
92 }
93
Harvey Harrison07633b52008-05-14 16:17:00 -070094 at.active = clamp_val(at.active, 2, 16) - 2;
95 at.setup = clamp_val(at.setup, 1, 4) - 1;
96 at.recover = clamp_val(at.recover, 1, 12) - 1;
Jeff Garzik669a5db2006-08-29 18:12:40 -040097
98 idetcr = (at.setup << 6) | (recoverbits[at.recover] << 3) | activebits[at.active];
99
100 pci_write_config_byte(pdev, port, idetcr);
101 pci_write_config_byte(pdev, port + 3, idefr);
102 /* We use ap->private_data as a pointer to the device currently
103 loaded for timing */
104 ap->private_data = adev;
105}
106
107/**
Tejun Heo9363c382008-04-07 22:47:16 +0900108 * ns87410_qc_issue - command issue
Jeff Garzik669a5db2006-08-29 18:12:40 -0400109 * @qc: command pending
110 *
111 * Called when the libata layer is about to issue a command. We wrap
112 * this interface so that we can load the correct ATA timings if
Robert P. J. Day3a4fa0a2007-10-19 23:10:43 +0200113 * necessary.
Jeff Garzik669a5db2006-08-29 18:12:40 -0400114 */
115
Tejun Heo9363c382008-04-07 22:47:16 +0900116static unsigned int ns87410_qc_issue(struct ata_queued_cmd *qc)
Jeff Garzik669a5db2006-08-29 18:12:40 -0400117{
118 struct ata_port *ap = qc->ap;
119 struct ata_device *adev = qc->dev;
120
121 /* If modes have been configured and the channel data is not loaded
122 then load it. We have to check if pio_mode is set as the core code
123 does not set adev->pio_mode to XFER_PIO_0 while probing as would be
124 logical */
125
126 if (adev->pio_mode && adev != ap->private_data)
127 ns87410_set_piomode(ap, adev);
128
Tejun Heo9363c382008-04-07 22:47:16 +0900129 return ata_sff_qc_issue(qc);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400130}
131
132static struct scsi_host_template ns87410_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +0900133 ATA_PIO_SHT(DRV_NAME),
Jeff Garzik669a5db2006-08-29 18:12:40 -0400134};
135
136static struct ata_port_operations ns87410_port_ops = {
Tejun Heo029cfd62008-03-25 12:22:49 +0900137 .inherits = &ata_sff_port_ops,
Tejun Heo9363c382008-04-07 22:47:16 +0900138 .qc_issue = ns87410_qc_issue,
Tejun Heo029cfd62008-03-25 12:22:49 +0900139 .cable_detect = ata_cable_40wire,
140 .set_piomode = ns87410_set_piomode,
Tejun Heoa1efdab2008-03-25 12:22:50 +0900141 .prereset = ns87410_pre_reset,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400142};
143
144static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id)
145{
Tejun Heo1626aeb2007-05-04 12:43:58 +0200146 static const struct ata_port_info info = {
Jeff Garzik1d2808f2007-05-28 06:59:48 -0400147 .flags = ATA_FLAG_SLAVE_POSS,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400148 .pio_mask = 0x0F,
149 .port_ops = &ns87410_port_ops
150 };
Tejun Heo1626aeb2007-05-04 12:43:58 +0200151 const struct ata_port_info *ppi[] = { &info, NULL };
Tejun Heo9363c382008-04-07 22:47:16 +0900152 return ata_pci_sff_init_one(dev, ppi, &ns87410_sht, NULL);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400153}
154
155static const struct pci_device_id ns87410[] = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400156 { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), },
157
158 { },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400159};
160
161static struct pci_driver ns87410_pci_driver = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400162 .name = DRV_NAME,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400163 .id_table = ns87410,
164 .probe = ns87410_init_one,
Alan30ced0f2006-11-22 16:57:36 +0000165 .remove = ata_pci_remove_one,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900166#ifdef CONFIG_PM
Alan30ced0f2006-11-22 16:57:36 +0000167 .suspend = ata_pci_device_suspend,
168 .resume = ata_pci_device_resume,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900169#endif
Jeff Garzik669a5db2006-08-29 18:12:40 -0400170};
171
172static int __init ns87410_init(void)
173{
174 return pci_register_driver(&ns87410_pci_driver);
175}
176
Jeff Garzik669a5db2006-08-29 18:12:40 -0400177static void __exit ns87410_exit(void)
178{
179 pci_unregister_driver(&ns87410_pci_driver);
180}
181
Jeff Garzik669a5db2006-08-29 18:12:40 -0400182MODULE_AUTHOR("Alan Cox");
183MODULE_DESCRIPTION("low-level driver for Nat Semi 87410");
184MODULE_LICENSE("GPL");
185MODULE_DEVICE_TABLE(pci, ns87410);
186MODULE_VERSION(DRV_VERSION);
187
188module_init(ns87410_init);
189module_exit(ns87410_exit);