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[linux-2.6-omap-h63xx.git] / 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/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
43 static void triflex_set_mode(ide_drive_t *drive, const u8 speed)
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         
52         pci_read_config_dword(dev, channel_offset, &triflex_timings);
53         
54         switch(speed) {
55                 case XFER_MW_DMA_2:
56                         timing = 0x0103; 
57                         break;
58                 case XFER_MW_DMA_1:
59                         timing = 0x0203;
60                         break;
61                 case XFER_MW_DMA_0:
62                         timing = 0x0808;
63                         break;
64                 case XFER_SW_DMA_2:
65                 case XFER_SW_DMA_1:
66                 case XFER_SW_DMA_0:
67                         timing = 0x0f0f;
68                         break;
69                 case XFER_PIO_4:
70                         timing = 0x0202;
71                         break;
72                 case XFER_PIO_3:
73                         timing = 0x0204;
74                         break;
75                 case XFER_PIO_2:
76                         timing = 0x0404;
77                         break;
78                 case XFER_PIO_1:
79                         timing = 0x0508;
80                         break;
81                 case XFER_PIO_0:
82                         timing = 0x0808;
83                         break;
84                 default:
85                         return;
86         }
87
88         triflex_timings &= ~(0xFFFF << (16 * unit));
89         triflex_timings |= (timing << (16 * unit));
90         
91         pci_write_config_dword(dev, channel_offset, triflex_timings);
92 }
93
94 static void triflex_set_pio_mode(ide_drive_t *drive, const u8 pio)
95 {
96         triflex_set_mode(drive, XFER_PIO_0 + pio);
97 }
98
99 static int triflex_config_drive_xfer_rate(ide_drive_t *drive)
100 {
101         if (ide_tune_dma(drive))
102                 return 0;
103
104         ide_set_max_pio(drive);
105
106         return -1;
107 }
108
109 static void __devinit init_hwif_triflex(ide_hwif_t *hwif)
110 {
111         hwif->set_pio_mode = &triflex_set_pio_mode;
112         hwif->set_dma_mode = &triflex_set_mode;
113
114         if (hwif->dma_base == 0)
115                 return;
116
117         hwif->atapi_dma  = 1;
118         hwif->mwdma_mask = 0x07;
119         hwif->swdma_mask = 0x07;
120         hwif->ide_dma_check = &triflex_config_drive_xfer_rate;
121         
122         if (!noautodma)
123                 hwif->autodma = 1;
124         hwif->drives[0].autodma = hwif->autodma;
125         hwif->drives[1].autodma = hwif->autodma;
126 }
127
128 static ide_pci_device_t triflex_device __devinitdata = {
129         .name           = "TRIFLEX",
130         .init_hwif      = init_hwif_triflex,
131         .autodma        = AUTODMA,
132         .enablebits     = {{0x80, 0x01, 0x01}, {0x80, 0x02, 0x02}},
133         .bootable       = ON_BOARD,
134         .pio_mask       = ATA_PIO4,
135 };
136
137 static int __devinit triflex_init_one(struct pci_dev *dev, 
138                 const struct pci_device_id *id)
139 {
140         return ide_setup_pci_device(dev, &triflex_device);
141 }
142
143 static struct pci_device_id triflex_pci_tbl[] = {
144         { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE,
145           PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
146         { 0, },
147 };
148 MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
149
150 static struct pci_driver driver = {
151         .name           = "TRIFLEX_IDE",
152         .id_table       = triflex_pci_tbl,
153         .probe          = triflex_init_one,
154 };
155
156 static int __init triflex_ide_init(void)
157 {
158         return ide_pci_register_driver(&driver);
159 }
160
161 module_init(triflex_ide_init);
162
163 MODULE_AUTHOR("Torben Mathiasen");
164 MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
165 MODULE_LICENSE("GPL");
166
167