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669a5db4 JG |
1 | /* |
2 | * pata_ns87410.c - National Semiconductor 87410 PATA for new ATA layer | |
3 | * (C) 2006 Red Hat Inc | |
669a5db4 JG |
4 | * |
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" | |
a0fcdc02 | 30 | #define DRV_VERSION "0.4.6" |
669a5db4 JG |
31 | |
32 | /** | |
33 | * ns87410_pre_reset - probe begin | |
cc0680a5 | 34 | * @link: ATA link |
d4b2bab4 | 35 | * @deadline: deadline jiffies for the operation |
669a5db4 | 36 | * |
a0fcdc02 | 37 | * Check enabled ports |
669a5db4 JG |
38 | */ |
39 | ||
cc0680a5 | 40 | static int ns87410_pre_reset(struct ata_link *link, unsigned long deadline) |
669a5db4 | 41 | { |
cc0680a5 | 42 | struct ata_port *ap = link->ap; |
669a5db4 JG |
43 | 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 | ||
c961922b AC |
49 | if (!pci_test_config_bits(pdev, &ns87410_enable_bits[ap->port_no])) |
50 | return -ENOENT; | |
d4b2bab4 | 51 | |
9363c382 | 52 | return ata_sff_prereset(link, deadline); |
669a5db4 JG |
53 | } |
54 | ||
669a5db4 JG |
55 | /** |
56 | * 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 | ||
64 | static 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) { | |
a44fec1f | 89 | dev_err(&pdev->dev, "unknown mode %d\n", adev->pio_mode); |
669a5db4 JG |
90 | return; |
91 | } | |
92 | ||
07633b5d HH |
93 | 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; | |
669a5db4 JG |
96 | |
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 | /** | |
9363c382 | 107 | * ns87410_qc_issue - command issue |
669a5db4 JG |
108 | * @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 | |
3a4fa0a2 | 112 | * necessary. |
669a5db4 JG |
113 | */ |
114 | ||
9363c382 | 115 | static unsigned int ns87410_qc_issue(struct ata_queued_cmd *qc) |
669a5db4 JG |
116 | { |
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 | ||
9363c382 | 128 | return ata_sff_qc_issue(qc); |
669a5db4 JG |
129 | } |
130 | ||
131 | static struct scsi_host_template ns87410_sht = { | |
68d1d07b | 132 | ATA_PIO_SHT(DRV_NAME), |
669a5db4 JG |
133 | }; |
134 | ||
135 | static struct ata_port_operations ns87410_port_ops = { | |
029cfd6b | 136 | .inherits = &ata_sff_port_ops, |
9363c382 | 137 | .qc_issue = ns87410_qc_issue, |
029cfd6b | 138 | .cable_detect = ata_cable_40wire, |
669a5db4 | 139 | .set_piomode = ns87410_set_piomode, |
a1efdaba | 140 | .prereset = ns87410_pre_reset, |
669a5db4 JG |
141 | }; |
142 | ||
143 | static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id) | |
144 | { | |
1626aeb8 | 145 | static const struct ata_port_info info = { |
1d2808fd | 146 | .flags = ATA_FLAG_SLAVE_POSS, |
14bdef98 | 147 | .pio_mask = ATA_PIO3, |
669a5db4 JG |
148 | .port_ops = &ns87410_port_ops |
149 | }; | |
1626aeb8 | 150 | const struct ata_port_info *ppi[] = { &info, NULL }; |
16ea0fc9 | 151 | return ata_pci_sff_init_one(dev, ppi, &ns87410_sht, NULL, 0); |
669a5db4 JG |
152 | } |
153 | ||
154 | static const struct pci_device_id ns87410[] = { | |
2d2744fc JG |
155 | { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_87410), }, |
156 | ||
157 | { }, | |
669a5db4 JG |
158 | }; |
159 | ||
160 | static struct pci_driver ns87410_pci_driver = { | |
2d2744fc | 161 | .name = DRV_NAME, |
669a5db4 JG |
162 | .id_table = ns87410, |
163 | .probe = ns87410_init_one, | |
30ced0f0 | 164 | .remove = ata_pci_remove_one, |
438ac6d5 | 165 | #ifdef CONFIG_PM |
30ced0f0 A |
166 | .suspend = ata_pci_device_suspend, |
167 | .resume = ata_pci_device_resume, | |
438ac6d5 | 168 | #endif |
669a5db4 JG |
169 | }; |
170 | ||
2fc75da0 | 171 | module_pci_driver(ns87410_pci_driver); |
669a5db4 | 172 | |
669a5db4 JG |
173 | MODULE_AUTHOR("Alan Cox"); |
174 | MODULE_DESCRIPTION("low-level driver for Nat Semi 87410"); | |
175 | MODULE_LICENSE("GPL"); | |
176 | MODULE_DEVICE_TABLE(pci, ns87410); | |
177 | MODULE_VERSION(DRV_VERSION); |