1/*
2 * triflex.c
3 *
4 * IDE Chipset driver for the Compaq TriFlex IDE controller.
5 *
6 * Known to work with the Compaq Workstation 5x00 series.
7 *
8 * Copyright (C) 2002 Hewlett-Packard Development Group, L.P.
9 * Author: Torben Mathiasen <torben.mathiasen@hp.com>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
23 *
24 * Loosely based on the piix & svwks drivers.
25 *
26 * Documentation:
27 *	Not publically available.
28 */
29
30#include <linux/types.h>
31#include <linux/module.h>
32#include <linux/kernel.h>
33#include <linux/delay.h>
34#include <linux/timer.h>
35#include <linux/mm.h>
36#include <linux/ioport.h>
37#include <linux/blkdev.h>
38#include <linux/hdreg.h>
39#include <linux/pci.h>
40#include <linux/ide.h>
41#include <linux/init.h>
42
43static int triflex_tune_chipset(ide_drive_t *drive, u8 xferspeed)
44{
45	ide_hwif_t *hwif = HWIF(drive);
46	struct pci_dev *dev = hwif->pci_dev;
47	u8 channel_offset = hwif->channel ? 0x74 : 0x70;
48	u16 timing = 0;
49	u32 triflex_timings = 0;
50	u8 unit = (drive->select.b.unit & 0x01);
51	u8 speed = ide_rate_filter(drive, xferspeed);
52
53	pci_read_config_dword(dev, channel_offset, &triflex_timings);
54
55	switch(speed) {
56		case XFER_MW_DMA_2:
57			timing = 0x0103;
58			break;
59		case XFER_MW_DMA_1:
60			timing = 0x0203;
61			break;
62		case XFER_MW_DMA_0:
63			timing = 0x0808;
64			break;
65		case XFER_SW_DMA_2:
66		case XFER_SW_DMA_1:
67		case XFER_SW_DMA_0:
68			timing = 0x0f0f;
69			break;
70		case XFER_PIO_4:
71			timing = 0x0202;
72			break;
73		case XFER_PIO_3:
74			timing = 0x0204;
75			break;
76		case XFER_PIO_2:
77			timing = 0x0404;
78			break;
79		case XFER_PIO_1:
80			timing = 0x0508;
81			break;
82		case XFER_PIO_0:
83			timing = 0x0808;
84			break;
85		default:
86			return -1;
87	}
88
89	triflex_timings &= ~(0xFFFF << (16 * unit));
90	triflex_timings |= (timing << (16 * unit));
91
92	pci_write_config_dword(dev, channel_offset, triflex_timings);
93
94	return (ide_config_drive_speed(drive, speed));
95}
96
97static void triflex_tune_drive(ide_drive_t *drive, u8 pio)
98{
99	int use_pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
100	(void) triflex_tune_chipset(drive, (XFER_PIO_0 + use_pio));
101}
102
103static int triflex_config_drive_xfer_rate(ide_drive_t *drive)
104{
105	if (ide_tune_dma(drive))
106		return 0;
107
108	triflex_tune_drive(drive, 255);
109
110	return -1;
111}
112
113static void __devinit init_hwif_triflex(ide_hwif_t *hwif)
114{
115	hwif->tuneproc = &triflex_tune_drive;
116	hwif->speedproc = &triflex_tune_chipset;
117
118	hwif->atapi_dma  = 1;
119	hwif->mwdma_mask = 0x07;
120	hwif->swdma_mask = 0x07;
121	hwif->ide_dma_check = &triflex_config_drive_xfer_rate;
122
123	if (!noautodma)
124		hwif->autodma = 1;
125	hwif->drives[0].autodma = hwif->autodma;
126	hwif->drives[1].autodma = hwif->autodma;
127}
128
129static ide_pci_device_t triflex_device __devinitdata = {
130	.name		= "TRIFLEX",
131	.init_hwif	= init_hwif_triflex,
132	.channels	= 2,
133	.autodma	= AUTODMA,
134	.enablebits	= {{0x80, 0x01, 0x01}, {0x80, 0x02, 0x02}},
135	.bootable	= ON_BOARD,
136};
137
138static int __devinit triflex_init_one(struct pci_dev *dev,
139		const struct pci_device_id *id)
140{
141	return ide_setup_pci_device(dev, &triflex_device);
142}
143
144static struct pci_device_id triflex_pci_tbl[] = {
145	{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE,
146	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
147	{ 0, },
148};
149MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
150
151static struct pci_driver driver = {
152	.name		= "TRIFLEX_IDE",
153	.id_table	= triflex_pci_tbl,
154	.probe		= triflex_init_one,
155};
156
157static int __init triflex_ide_init(void)
158{
159	return ide_pci_register_driver(&driver);
160}
161
162module_init(triflex_ide_init);
163
164MODULE_AUTHOR("Torben Mathiasen");
165MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
166MODULE_LICENSE("GPL");
167