Merge branch 'master' of /home/src/linux-2.6/
[linux-2.6] / drivers / ide / pci / triflex.c
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 __devinit 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