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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 | |
37 | static 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 | |
84 | static 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 | |
90 | static 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 | |
95 | static 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 | |
104 | static 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 | |
109 | static const struct pci_device_id triflex_pci_tbl[] = { |
110 | { PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), 0 }, |
111 | { 0, }, |
112 | }; |
113 | MODULE_DEVICE_TABLE(pci, triflex_pci_tbl); |
114 | |
115 | #ifdef CONFIG_PM |
116 | static 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 | |
129 | static 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 | |
138 | static int __init triflex_ide_init(void) |
139 | { |
140 | return ide_pci_register_driver(&triflex_pci_driver); |
141 | } |
142 | |
143 | static void __exit triflex_ide_exit(void) |
144 | { |
145 | pci_unregister_driver(&triflex_pci_driver); |
146 | } |
147 | |
148 | module_init(triflex_ide_init); |
149 | module_exit(triflex_ide_exit); |
150 | |
151 | MODULE_AUTHOR("Torben Mathiasen"); |
152 | MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE"); |
153 | MODULE_LICENSE("GPL"); |
154 | |
155 | |
156 |
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