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/config.h>
31 #include <linux/types.h>
32 #include <linux/module.h>
33 #include <linux/kernel.h>
34 #include <linux/delay.h>
35 #include <linux/timer.h>
36 #include <linux/mm.h>
37 #include <linux/ioport.h>
38 #include <linux/blkdev.h>
39 #include <linux/hdreg.h>
40 #include <linux/pci.h>
41 #include <linux/ide.h>
42 #include <linux/init.h>
43
44 static int triflex_tune_chipset(ide_drive_t *drive, u8 xferspeed)
45 {
46 ide_hwif_t *hwif = HWIF(drive);
47 struct pci_dev *dev = hwif->pci_dev;
48 u8 channel_offset = hwif->channel ? 0x74 : 0x70;
49 u16 timing = 0;
50 u32 triflex_timings = 0;
51 u8 unit = (drive->select.b.unit & 0x01);
52 u8 speed = ide_rate_filter(0, xferspeed);
53
54 pci_read_config_dword(dev, channel_offset, &triflex_timings);
55
56 switch(speed) {
57 case XFER_MW_DMA_2:
58 timing = 0x0103;
59 break;
60 case XFER_MW_DMA_1:
61 timing = 0x0203;
62 break;
63 case XFER_MW_DMA_0:
64 timing = 0x0808;
65 break;
66 case XFER_SW_DMA_2:
67 case XFER_SW_DMA_1:
68 case XFER_SW_DMA_0:
69 timing = 0x0f0f;
70 break;
71 case XFER_PIO_4:
72 timing = 0x0202;
73 break;
74 case XFER_PIO_3:
75 timing = 0x0204;
76 break;
77 case XFER_PIO_2:
78 timing = 0x0404;
79 break;
80 case XFER_PIO_1:
81 timing = 0x0508;
82 break;
83 case XFER_PIO_0:
84 timing = 0x0808;
85 break;
86 default:
87 return -1;
88 }
89
90 triflex_timings &= ~(0xFFFF << (16 * unit));
91 triflex_timings |= (timing << (16 * unit));
92
93 pci_write_config_dword(dev, channel_offset, triflex_timings);
94
95 return (ide_config_drive_speed(drive, speed));
96 }
97
98 static void triflex_tune_drive(ide_drive_t *drive, u8 pio)
99 {
100 int use_pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
101 (void) triflex_tune_chipset(drive, (XFER_PIO_0 + use_pio));
102 }
103
104 static int triflex_config_drive_for_dma(ide_drive_t *drive)
105 {
106 int speed = ide_dma_speed(drive, 0); /* No ultra speeds */
107
108 if (!speed) {
109 u8 pspeed = ide_get_best_pio_mode(drive, 255, 4, NULL);
110 speed = XFER_PIO_0 + pspeed;
111 }
112
113 (void) triflex_tune_chipset(drive, speed);
114 return ide_dma_enable(drive);
115 }
116
117 static int triflex_config_drive_xfer_rate(ide_drive_t *drive)
118 {
119 ide_hwif_t *hwif = HWIF(drive);
120 struct hd_driveid *id = drive->id;
121
122 if ((id->capability & 1) && drive->autodma) {
123 if (ide_use_dma(drive)) {
124 if (triflex_config_drive_for_dma(drive))
125 return hwif->ide_dma_on(drive);
126 }
127 }
128
129 hwif->tuneproc(drive, 255);
130 return hwif->ide_dma_off_quietly(drive);
131 }
132
133 static void __init init_hwif_triflex(ide_hwif_t *hwif)
134 {
135 hwif->tuneproc = &triflex_tune_drive;
136 hwif->speedproc = &triflex_tune_chipset;
137
138 hwif->atapi_dma = 1;
139 hwif->mwdma_mask = 0x07;
140 hwif->swdma_mask = 0x07;
141 hwif->ide_dma_check = &triflex_config_drive_xfer_rate;
142
143 if (!noautodma)
144 hwif->autodma = 1;
145 hwif->drives[0].autodma = hwif->autodma;
146 hwif->drives[1].autodma = hwif->autodma;
147 }
148
149 static ide_pci_device_t triflex_device __devinitdata = {
150 .name = "TRIFLEX",
151 .init_hwif = init_hwif_triflex,
152 .channels = 2,
153 .autodma = AUTODMA,
154 .enablebits = {{0x80, 0x01, 0x01}, {0x80, 0x02, 0x02}},
155 .bootable = ON_BOARD,
156 };
157
158 static int __devinit triflex_init_one(struct pci_dev *dev,
159 const struct pci_device_id *id)
160 {
161 return ide_setup_pci_device(dev, &triflex_device);
162 }
163
164 static struct pci_device_id triflex_pci_tbl[] = {
165 { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE,
166 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
167 { 0, },
168 };
169 MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
170
171 static struct pci_driver driver = {
172 .name = "TRIFLEX_IDE",
173 .id_table = triflex_pci_tbl,
174 .probe = triflex_init_one,
175 };
176
177 static int triflex_ide_init(void)
178 {
179 return ide_pci_register_driver(&driver);
180 }
181
182 module_init(triflex_ide_init);
183
184 MODULE_AUTHOR("Torben Mathiasen");
185 MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
186 MODULE_LICENSE("GPL");
187
188
189
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