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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
Jeff Garzik669a5db2006-08-29 18:12:40 -04004 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2, or (at your option)
8 * any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; see the file COPYING. If not, write to
17 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/pci.h>
23#include <linux/init.h>
24#include <linux/blkdev.h>
25#include <linux/delay.h>
26#include <scsi/scsi_host.h>
27#include <linux/libata.h>
28
29#define DRV_NAME "pata_ns87410"
Jeff Garzika0fcdc02007-03-09 07:24:15 -050030#define DRV_VERSION "0.4.6"
Jeff Garzik669a5db2006-08-29 18:12:40 -040031
32/**
33 * ns87410_pre_reset - probe begin
Tejun Heocc0680a2007-08-06 18:36:23 +090034 * @link: ATA link
Tejun Heod4b2bab2007-02-02 16:50:52 +090035 * @deadline: deadline jiffies for the operation
Jeff Garzik669a5db2006-08-29 18:12:40 -040036 *
Jeff Garzika0fcdc02007-03-09 07:24:15 -050037 * Check enabled ports
Jeff Garzik669a5db2006-08-29 18:12:40 -040038 */
39
Tejun Heocc0680a2007-08-06 18:36:23 +090040static int ns87410_pre_reset(struct ata_link *link, unsigned long deadline)
Jeff Garzik669a5db2006-08-29 18:12:40 -040041{
Tejun Heocc0680a2007-08-06 18:36:23 +090042 struct ata_port *ap = link->ap;
Jeff Garzik669a5db2006-08-29 18:12:40 -040043 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
44 static const struct pci_bits ns87410_enable_bits[] = {
45 { 0x43, 1, 0x08, 0x08 },
46 { 0x47, 1, 0x08, 0x08 }
47 };
48
Alan Coxc9619222006-09-26 17:53:38 +010049 if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no]))
50 return -ENOENT;
Tejun Heod4b2bab2007-02-02 16:50:52 +090051
Tejun Heo9363c382008-04-07 22:47:16 +090052 return ata_sff_prereset(link, deadline);
Jeff Garzik669a5db2006-08-29 18:12:40 -040053}
54
55/**
Jeff Garzik669a5db2006-08-29 18:12:40 -040056 * ns87410_set_piomode - set initial PIO mode data
57 * @ap: ATA interface
58 * @adev: ATA device
59 *
60 * Program timing data. This is kept per channel not per device,
61 * and only affects the data port.
62 */
63
64static void ns87410_set_piomode(struct ata_port *ap, struct ata_device *adev)
65{
66 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
67 int port = 0x40 + 4 * ap->port_no;
68 u8 idetcr, idefr;
69 struct ata_timing at;
70
71 static const u8 activebits[15] = {
72 0, 1, 2, 3, 4,
73 5, 5, 6, 6, 6,
74 6, 7, 7, 7, 7
75 };
76
77 static const u8 recoverbits[12] = {
78 0, 1, 2, 3, 4, 5, 6, 6, 7, 7, 7, 7
79 };
80
81 pci_read_config_byte(pdev, port + 3, &idefr);
82
83 if (ata_pio_need_iordy(adev))
84 idefr |= 0x04; /* IORDY enable */
85 else
86 idefr &= ~0x04;
87
88 if (ata_timing_compute(adev, adev->pio_mode, &at, 30303, 1) < 0) {
Joe Perchesa44fec12011-04-15 15:51:58 -070089 dev_err(&pdev->dev, "unknown mode %d\n", adev->pio_mode);
Jeff Garzik669a5db2006-08-29 18:12:40 -040090 return;
91 }
92
Harvey Harrison07633b52008-05-14 16:17:00 -070093 at.active = clamp_val(at.active, 2, 16) - 2;
94 at.setup = clamp_val(at.setup, 1, 4) - 1;
95 at.recover = clamp_val(at.recover, 1, 12) - 1;
Jeff Garzik669a5db2006-08-29 18:12:40 -040096
97 idetcr = (at.setup << 6) | (recoverbits[at.recover] << 3) | activebits[at.active];
98
99 pci_write_config_byte(pdev, port, idetcr);
100 pci_write_config_byte(pdev, port + 3, idefr);
101 /* We use ap->private_data as a pointer to the device currently
102 loaded for timing */
103 ap->private_data = adev;
104}
105
106/**
Tejun Heo9363c382008-04-07 22:47:16 +0900107 * ns87410_qc_issue - command issue
Jeff Garzik669a5db2006-08-29 18:12:40 -0400108 * @qc: command pending
109 *
110 * Called when the libata layer is about to issue a command. We wrap
111 * this interface so that we can load the correct ATA timings if
Robert P. J. Day3a4fa0a2007-10-19 23:10:43 +0200112 * necessary.
Jeff Garzik669a5db2006-08-29 18:12:40 -0400113 */
114
Tejun Heo9363c382008-04-07 22:47:16 +0900115static unsigned int ns87410_qc_issue(struct ata_queued_cmd *qc)
Jeff Garzik669a5db2006-08-29 18:12:40 -0400116{
117 struct ata_port *ap = qc->ap;
118 struct ata_device *adev = qc->dev;
119
120 /* If modes have been configured and the channel data is not loaded
121 then load it. We have to check if pio_mode is set as the core code
122 does not set adev->pio_mode to XFER_PIO_0 while probing as would be
123 logical */
124
125 if (adev->pio_mode && adev != ap->private_data)
126 ns87410_set_piomode(ap, adev);
127
Tejun Heo9363c382008-04-07 22:47:16 +0900128 return ata_sff_qc_issue(qc);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400129}
130
131static struct scsi_host_template ns87410_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +0900132 ATA_PIO_SHT(DRV_NAME),
Jeff Garzik669a5db2006-08-29 18:12:40 -0400133};
134
135static struct ata_port_operations ns87410_port_ops = {
Tejun Heo029cfd62008-03-25 12:22:49 +0900136 .inherits = &ata_sff_port_ops,
Tejun Heo9363c382008-04-07 22:47:16 +0900137 .qc_issue = ns87410_qc_issue,
Tejun Heo029cfd62008-03-25 12:22:49 +0900138 .cable_detect = ata_cable_40wire,
139 .set_piomode = ns87410_set_piomode,
Tejun Heoa1efdab2008-03-25 12:22:50 +0900140 .prereset = ns87410_pre_reset,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400141};
142
143static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id)
144{
Tejun Heo1626aeb2007-05-04 12:43:58 +0200145 static const struct ata_port_info info = {
Jeff Garzik1d2808f2007-05-28 06:59:48 -0400146 .flags = ATA_FLAG_SLAVE_POSS,
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100147 .pio_mask = ATA_PIO3,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400148 .port_ops = &ns87410_port_ops
149 };
Tejun Heo1626aeb2007-05-04 12:43:58 +0200150 const struct ata_port_info *ppi[] = { &info, NULL };
Alan Cox16ea0fc2010-02-23 02:26:06 -0500151 return ata_pci_sff_init_one(dev, ppi, &ns87410_sht, NULL, 0);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400152}
153
154static const struct pci_device_id ns87410[] = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400155 { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), },
156
157 { },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400158};
159
160static struct pci_driver ns87410_pci_driver = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400161 .name = DRV_NAME,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400162 .id_table = ns87410,
163 .probe = ns87410_init_one,
Alan30ced0f2006-11-22 16:57:36 +0000164 .remove = ata_pci_remove_one,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900165#ifdef CONFIG_PM
Alan30ced0f2006-11-22 16:57:36 +0000166 .suspend = ata_pci_device_suspend,
167 .resume = ata_pci_device_resume,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900168#endif
Jeff Garzik669a5db2006-08-29 18:12:40 -0400169};
170
171static int __init ns87410_init(void)
172{
173 return pci_register_driver(&ns87410_pci_driver);
174}
175
Jeff Garzik669a5db2006-08-29 18:12:40 -0400176static void __exit ns87410_exit(void)
177{
178 pci_unregister_driver(&ns87410_pci_driver);
179}
180
Jeff Garzik669a5db2006-08-29 18:12:40 -0400181MODULE_AUTHOR("Alan Cox");
182MODULE_DESCRIPTION("low-level driver for Nat Semi 87410");
183MODULE_LICENSE("GPL");
184MODULE_DEVICE_TABLE(pci, ns87410);
185MODULE_VERSION(DRV_VERSION);
186
187module_init(ns87410_init);
188module_exit(ns87410_exit);