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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 1996 Linus Torvalds & author (see below)
4 */
5
6#include <linux/module.h>
7#include <linux/types.h>
8#include <linux/kernel.h>
9#include <linux/delay.h>
10#include <linux/timer.h>
11#include <linux/mm.h>
12#include <linux/ioport.h>
13#include <linux/blkdev.h>
14#include <linux/ide.h>
15#include <linux/init.h>
16
17#include <asm/io.h>
18
19#define DRV_NAME "dtc2278"
20
21/*
22 * Changing this #undef to #define may solve start up problems in some systems.
23 */
24#undef ALWAYS_SET_DTC2278_PIO_MODE
25
26/*
27 * From: andy@cercle.cts.com (Dyan Wile)
28 *
29 * Below is a patch for DTC-2278 - alike software-programmable controllers
30 * The code enables the secondary IDE controller and the PIO4 (3?) timings on
31 * the primary (EIDE). You may probably have to enable the 32-bit support to
32 * get the full speed. You better get the disk interrupts disabled ( hdparm -u0
33 * /dev/hd.. ) for the drives connected to the EIDE interface. (I get my
34 * filesystem corrupted with -u1, but under heavy disk load only :-)
35 *
36 * This card is now forced to use the "serialize" feature,
37 * and irq-unmasking is disallowed. If io_32bit is enabled,
38 * it must be done for BOTH drives on each interface.
39 *
40 * This code was written for the DTC2278E, but might work with any of these:
41 *
42 * DTC2278S has only a single IDE interface.
43 * DTC2278D has two IDE interfaces and is otherwise identical to the S version.
44 * DTC2278E also has serial ports and a printer port
45 * DTC2278EB: has onboard BIOS, and "works like a charm" -- Kent Bradford <kent@theory.caltech.edu>
46 *
47 * There may be a fourth controller type. The S and D versions use the
48 * Winbond chip, and I think the E version does also.
49 *
50 */
51
52static void sub22 (char b, char c)
53{
54 int i;
55
56 for(i = 0; i < 3; ++i) {
57 inb(0x3f6);
58 outb_p(b,0xb0);
59 inb(0x3f6);
60 outb_p(c,0xb4);
61 inb(0x3f6);
62 if(inb(0xb4) == c) {
63 outb_p(7,0xb0);
64 inb(0x3f6);
65 return; /* success */
66 }
67 }
68}
69
70static DEFINE_SPINLOCK(dtc2278_lock);
71
72static void dtc2278_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
73{
74 unsigned long flags;
75
76 if (drive->pio_mode >= XFER_PIO_3) {
77 spin_lock_irqsave(&dtc2278_lock, flags);
78 /*
79 * This enables PIO mode4 (3?) on the first interface
80 */
81 sub22(1,0xc3);
82 sub22(0,0xa0);
83 spin_unlock_irqrestore(&dtc2278_lock, flags);
84 } else {
85 /* we don't know how to set it back again.. */
86 /* Actually we do - there is a data sheet available for the
87 Winbond but does anyone actually care */
88 }
89}
90
91static const struct ide_port_ops dtc2278_port_ops = {
92 .set_pio_mode = dtc2278_set_pio_mode,
93};
94
95static const struct ide_port_info dtc2278_port_info __initconst = {
96 .name = DRV_NAME,
97 .chipset = ide_dtc2278,
98 .port_ops = &dtc2278_port_ops,
99 .host_flags = IDE_HFLAG_SERIALIZE |
100 IDE_HFLAG_NO_UNMASK_IRQS |
101 IDE_HFLAG_IO_32BIT |
102 /* disallow ->io_32bit changes */
103 IDE_HFLAG_NO_IO_32BIT |
104 IDE_HFLAG_NO_DMA |
105 IDE_HFLAG_DTC2278,
106 .pio_mask = ATA_PIO4,
107};
108
109static int __init dtc2278_probe(void)
110{
111 unsigned long flags;
112
113 local_irq_save(flags);
114 /*
115 * This enables the second interface
116 */
117 outb_p(4,0xb0);
118 inb(0x3f6);
119 outb_p(0x20,0xb4);
120 inb(0x3f6);
121#ifdef ALWAYS_SET_DTC2278_PIO_MODE
122 /*
123 * This enables PIO mode4 (3?) on the first interface
124 * and may solve start-up problems for some people.
125 */
126 sub22(1,0xc3);
127 sub22(0,0xa0);
128#endif
129 local_irq_restore(flags);
130
131 return ide_legacy_device_add(&dtc2278_port_info, 0);
132}
133
134static bool probe_dtc2278;
135
136module_param_named(probe, probe_dtc2278, bool, 0);
137MODULE_PARM_DESC(probe, "probe for DTC2278xx chipsets");
138
139static int __init dtc2278_init(void)
140{
141 if (probe_dtc2278 == 0)
142 return -ENODEV;
143
144 if (dtc2278_probe()) {
145 printk(KERN_ERR "dtc2278: ide interfaces already in use!\n");
146 return -EBUSY;
147 }
148 return 0;
149}
150
151module_init(dtc2278_init);
152
153MODULE_AUTHOR("See Local File");
154MODULE_DESCRIPTION("support of DTC-2278 VLB IDE chipsets");
155MODULE_LICENSE("GPL");
1/*
2 * Copyright (C) 1996 Linus Torvalds & author (see below)
3 */
4
5#include <linux/module.h>
6#include <linux/types.h>
7#include <linux/kernel.h>
8#include <linux/delay.h>
9#include <linux/timer.h>
10#include <linux/mm.h>
11#include <linux/ioport.h>
12#include <linux/blkdev.h>
13#include <linux/ide.h>
14#include <linux/init.h>
15
16#include <asm/io.h>
17
18#define DRV_NAME "dtc2278"
19
20/*
21 * Changing this #undef to #define may solve start up problems in some systems.
22 */
23#undef ALWAYS_SET_DTC2278_PIO_MODE
24
25/*
26 * From: andy@cercle.cts.com (Dyan Wile)
27 *
28 * Below is a patch for DTC-2278 - alike software-programmable controllers
29 * The code enables the secondary IDE controller and the PIO4 (3?) timings on
30 * the primary (EIDE). You may probably have to enable the 32-bit support to
31 * get the full speed. You better get the disk interrupts disabled ( hdparm -u0
32 * /dev/hd.. ) for the drives connected to the EIDE interface. (I get my
33 * filesystem corrupted with -u1, but under heavy disk load only :-)
34 *
35 * This card is now forced to use the "serialize" feature,
36 * and irq-unmasking is disallowed. If io_32bit is enabled,
37 * it must be done for BOTH drives on each interface.
38 *
39 * This code was written for the DTC2278E, but might work with any of these:
40 *
41 * DTC2278S has only a single IDE interface.
42 * DTC2278D has two IDE interfaces and is otherwise identical to the S version.
43 * DTC2278E also has serial ports and a printer port
44 * DTC2278EB: has onboard BIOS, and "works like a charm" -- Kent Bradford <kent@theory.caltech.edu>
45 *
46 * There may be a fourth controller type. The S and D versions use the
47 * Winbond chip, and I think the E version does also.
48 *
49 */
50
51static void sub22 (char b, char c)
52{
53 int i;
54
55 for(i = 0; i < 3; ++i) {
56 inb(0x3f6);
57 outb_p(b,0xb0);
58 inb(0x3f6);
59 outb_p(c,0xb4);
60 inb(0x3f6);
61 if(inb(0xb4) == c) {
62 outb_p(7,0xb0);
63 inb(0x3f6);
64 return; /* success */
65 }
66 }
67}
68
69static DEFINE_SPINLOCK(dtc2278_lock);
70
71static void dtc2278_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
72{
73 unsigned long flags;
74
75 if (drive->pio_mode >= XFER_PIO_3) {
76 spin_lock_irqsave(&dtc2278_lock, flags);
77 /*
78 * This enables PIO mode4 (3?) on the first interface
79 */
80 sub22(1,0xc3);
81 sub22(0,0xa0);
82 spin_unlock_irqrestore(&dtc2278_lock, flags);
83 } else {
84 /* we don't know how to set it back again.. */
85 /* Actually we do - there is a data sheet available for the
86 Winbond but does anyone actually care */
87 }
88}
89
90static const struct ide_port_ops dtc2278_port_ops = {
91 .set_pio_mode = dtc2278_set_pio_mode,
92};
93
94static const struct ide_port_info dtc2278_port_info __initdata = {
95 .name = DRV_NAME,
96 .chipset = ide_dtc2278,
97 .port_ops = &dtc2278_port_ops,
98 .host_flags = IDE_HFLAG_SERIALIZE |
99 IDE_HFLAG_NO_UNMASK_IRQS |
100 IDE_HFLAG_IO_32BIT |
101 /* disallow ->io_32bit changes */
102 IDE_HFLAG_NO_IO_32BIT |
103 IDE_HFLAG_NO_DMA |
104 IDE_HFLAG_DTC2278,
105 .pio_mask = ATA_PIO4,
106};
107
108static int __init dtc2278_probe(void)
109{
110 unsigned long flags;
111
112 local_irq_save(flags);
113 /*
114 * This enables the second interface
115 */
116 outb_p(4,0xb0);
117 inb(0x3f6);
118 outb_p(0x20,0xb4);
119 inb(0x3f6);
120#ifdef ALWAYS_SET_DTC2278_PIO_MODE
121 /*
122 * This enables PIO mode4 (3?) on the first interface
123 * and may solve start-up problems for some people.
124 */
125 sub22(1,0xc3);
126 sub22(0,0xa0);
127#endif
128 local_irq_restore(flags);
129
130 return ide_legacy_device_add(&dtc2278_port_info, 0);
131}
132
133static int probe_dtc2278;
134
135module_param_named(probe, probe_dtc2278, bool, 0);
136MODULE_PARM_DESC(probe, "probe for DTC2278xx chipsets");
137
138static int __init dtc2278_init(void)
139{
140 if (probe_dtc2278 == 0)
141 return -ENODEV;
142
143 if (dtc2278_probe()) {
144 printk(KERN_ERR "dtc2278: ide interfaces already in use!\n");
145 return -EBUSY;
146 }
147 return 0;
148}
149
150module_init(dtc2278_init);
151
152MODULE_AUTHOR("See Local File");
153MODULE_DESCRIPTION("support of DTC-2278 VLB IDE chipsets");
154MODULE_LICENSE("GPL");