1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * IDE Chipset driver for the Compaq TriFlex IDE controller.
4 *
5 * Known to work with the Compaq Workstation 5x00 series.
6 *
7 * Copyright (C) 2002 Hewlett-Packard Development Group, L.P.
8 * Author: Torben Mathiasen <torben.mathiasen@hp.com>
9 *
10 * Loosely based on the piix & svwks drivers.
11 *
12 * Documentation:
13 * Not publicly available.
14 */
15
16 #include <linux/types.h>
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/pci.h>
20 #include <linux/ide.h>
21 #include <linux/init.h>
22
23 #define DRV_NAME "triflex"
24
triflex_set_mode(ide_hwif_t * hwif,ide_drive_t * drive)25 static void triflex_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
26 {
27 struct pci_dev *dev = to_pci_dev(hwif->dev);
28 u32 triflex_timings = 0;
29 u16 timing = 0;
30 u8 channel_offset = hwif->channel ? 0x74 : 0x70, unit = drive->dn & 1;
31
32 pci_read_config_dword(dev, channel_offset, &triflex_timings);
33
34 switch (drive->dma_mode) {
35 case XFER_MW_DMA_2:
36 timing = 0x0103;
37 break;
38 case XFER_MW_DMA_1:
39 timing = 0x0203;
40 break;
41 case XFER_MW_DMA_0:
42 timing = 0x0808;
43 break;
44 case XFER_SW_DMA_2:
45 case XFER_SW_DMA_1:
46 case XFER_SW_DMA_0:
47 timing = 0x0f0f;
48 break;
49 case XFER_PIO_4:
50 timing = 0x0202;
51 break;
52 case XFER_PIO_3:
53 timing = 0x0204;
54 break;
55 case XFER_PIO_2:
56 timing = 0x0404;
57 break;
58 case XFER_PIO_1:
59 timing = 0x0508;
60 break;
61 case XFER_PIO_0:
62 timing = 0x0808;
63 break;
64 }
65
66 triflex_timings &= ~(0xFFFF << (16 * unit));
67 triflex_timings |= (timing << (16 * unit));
68
69 pci_write_config_dword(dev, channel_offset, triflex_timings);
70 }
71
triflex_set_pio_mode(ide_hwif_t * hwif,ide_drive_t * drive)72 static void triflex_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
73 {
74 drive->dma_mode = drive->pio_mode;
75 triflex_set_mode(hwif, drive);
76 }
77
78 static const struct ide_port_ops triflex_port_ops = {
79 .set_pio_mode = triflex_set_pio_mode,
80 .set_dma_mode = triflex_set_mode,
81 };
82
83 static const struct ide_port_info triflex_device = {
84 .name = DRV_NAME,
85 .enablebits = {{0x80, 0x01, 0x01}, {0x80, 0x02, 0x02}},
86 .port_ops = &triflex_port_ops,
87 .pio_mask = ATA_PIO4,
88 .swdma_mask = ATA_SWDMA2,
89 .mwdma_mask = ATA_MWDMA2,
90 };
91
triflex_init_one(struct pci_dev * dev,const struct pci_device_id * id)92 static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
93 {
94 return ide_pci_init_one(dev, &triflex_device, NULL);
95 }
96
97 static const struct pci_device_id triflex_pci_tbl[] = {
98 { PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), 0 },
99 { 0, },
100 };
101 MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
102
103 #ifdef CONFIG_PM
triflex_ide_pci_suspend(struct pci_dev * dev,pm_message_t state)104 static int triflex_ide_pci_suspend(struct pci_dev *dev, pm_message_t state)
105 {
106 /*
107 * We must not disable or powerdown the device.
108 * APM bios refuses to suspend if IDE is not accessible.
109 */
110 pci_save_state(dev);
111 return 0;
112 }
113 #else
114 #define triflex_ide_pci_suspend NULL
115 #endif
116
117 static struct pci_driver triflex_pci_driver = {
118 .name = "TRIFLEX_IDE",
119 .id_table = triflex_pci_tbl,
120 .probe = triflex_init_one,
121 .remove = ide_pci_remove,
122 .suspend = triflex_ide_pci_suspend,
123 .resume = ide_pci_resume,
124 };
125
triflex_ide_init(void)126 static int __init triflex_ide_init(void)
127 {
128 return ide_pci_register_driver(&triflex_pci_driver);
129 }
130
triflex_ide_exit(void)131 static void __exit triflex_ide_exit(void)
132 {
133 pci_unregister_driver(&triflex_pci_driver);
134 }
135
136 module_init(triflex_ide_init);
137 module_exit(triflex_ide_exit);
138
139 MODULE_AUTHOR("Torben Mathiasen");
140 MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
141 MODULE_LICENSE("GPL");
142
143
144