1/*
2 * IDE Chipset driver for the Compaq TriFlex IDE controller.
3 *
4 * Known to work with the Compaq Workstation 5x00 series.
5 *
6 * Copyright (C) 2002 Hewlett-Packard Development Group, L.P.
7 * Author: Torben Mathiasen <torben.mathiasen@hp.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
21 *
22 * Loosely based on the piix & svwks drivers.
23 *
24 * Documentation:
25 *	Not publicly available.
26 */
27
28#include <linux/types.h>
29#include <linux/module.h>
30#include <linux/kernel.h>
31#include <linux/pci.h>
32#include <linux/ide.h>
33#include <linux/init.h>
34
35#define DRV_NAME "triflex"
36
37static void triflex_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
38{
39	struct pci_dev *dev = to_pci_dev(hwif->dev);
40	u32 triflex_timings = 0;
41	u16 timing = 0;
42	u8 channel_offset = hwif->channel ? 0x74 : 0x70, unit = drive->dn & 1;
43
44	pci_read_config_dword(dev, channel_offset, &triflex_timings);
45
46	switch (drive->dma_mode) {
47		case XFER_MW_DMA_2:
48			timing = 0x0103;
49			break;
50		case XFER_MW_DMA_1:
51			timing = 0x0203;
52			break;
53		case XFER_MW_DMA_0:
54			timing = 0x0808;
55			break;
56		case XFER_SW_DMA_2:
57		case XFER_SW_DMA_1:
58		case XFER_SW_DMA_0:
59			timing = 0x0f0f;
60			break;
61		case XFER_PIO_4:
62			timing = 0x0202;
63			break;
64		case XFER_PIO_3:
65			timing = 0x0204;
66			break;
67		case XFER_PIO_2:
68			timing = 0x0404;
69			break;
70		case XFER_PIO_1:
71			timing = 0x0508;
72			break;
73		case XFER_PIO_0:
74			timing = 0x0808;
75			break;
76	}
77
78	triflex_timings &= ~(0xFFFF << (16 * unit));
79	triflex_timings |= (timing << (16 * unit));
80
81	pci_write_config_dword(dev, channel_offset, triflex_timings);
82}
83
84static void triflex_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
85{
86	drive->dma_mode = drive->pio_mode;
87	triflex_set_mode(hwif, drive);
88}
89
90static const struct ide_port_ops triflex_port_ops = {
91	.set_pio_mode		= triflex_set_pio_mode,
92	.set_dma_mode		= triflex_set_mode,
93};
94
95static const struct ide_port_info triflex_device = {
96	.name		= DRV_NAME,
97	.enablebits	= {{0x80, 0x01, 0x01}, {0x80, 0x02, 0x02}},
98	.port_ops	= &triflex_port_ops,
99	.pio_mask	= ATA_PIO4,
100	.swdma_mask	= ATA_SWDMA2,
101	.mwdma_mask	= ATA_MWDMA2,
102};
103
104static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
105{
106	return ide_pci_init_one(dev, &triflex_device, NULL);
107}
108
109static const struct pci_device_id triflex_pci_tbl[] = {
110	{ PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), 0 },
111	{ 0, },
112};
113MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
114
115#ifdef CONFIG_PM
116static int triflex_ide_pci_suspend(struct pci_dev *dev, pm_message_t state)
117{
118	/*
119	 * We must not disable or powerdown the device.
120	 * APM bios refuses to suspend if IDE is not accessible.
121	 */
122	pci_save_state(dev);
123	return 0;
124}
125#else
126#define triflex_ide_pci_suspend NULL
127#endif
128
129static struct pci_driver triflex_pci_driver = {
130	.name		= "TRIFLEX_IDE",
131	.id_table	= triflex_pci_tbl,
132	.probe		= triflex_init_one,
133	.remove		= ide_pci_remove,
134	.suspend	= triflex_ide_pci_suspend,
135	.resume		= ide_pci_resume,
136};
137
138static int __init triflex_ide_init(void)
139{
140	return ide_pci_register_driver(&triflex_pci_driver);
141}
142
143static void __exit triflex_ide_exit(void)
144{
145	pci_unregister_driver(&triflex_pci_driver);
146}
147
148module_init(triflex_ide_init);
149module_exit(triflex_ide_exit);
150
151MODULE_AUTHOR("Torben Mathiasen");
152MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
153MODULE_LICENSE("GPL");
154
155
156