1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * linux/arch/arm/mach-footbridge/cats-hw.c
4 *
5 * CATS machine fixup
6 *
7 * Copyright (C) 1998, 1999 Russell King, Phil Blundell
8 */
9 #include <linux/ioport.h>
10 #include <linux/kernel.h>
11 #include <linux/init.h>
12 #include <linux/screen_info.h>
13 #include <linux/io.h>
14 #include <linux/spinlock.h>
15
16 #include <asm/hardware/dec21285.h>
17 #include <asm/mach-types.h>
18 #include <asm/setup.h>
19
20 #include <asm/mach/arch.h>
21
22 #include "common.h"
23
24 #define CFG_PORT 0x370
25 #define INDEX_PORT (CFG_PORT)
26 #define DATA_PORT (CFG_PORT + 1)
27
cats_hw_init(void)28 static int __init cats_hw_init(void)
29 {
30 if (machine_is_cats()) {
31 /* Set Aladdin to CONFIGURE mode */
32 outb(0x51, CFG_PORT);
33 outb(0x23, CFG_PORT);
34
35 /* Select logical device 3 */
36 outb(0x07, INDEX_PORT);
37 outb(0x03, DATA_PORT);
38
39 /* Set parallel port to DMA channel 3, ECP+EPP1.9,
40 enable EPP timeout */
41 outb(0x74, INDEX_PORT);
42 outb(0x03, DATA_PORT);
43
44 outb(0xf0, INDEX_PORT);
45 outb(0x0f, DATA_PORT);
46
47 outb(0xf1, INDEX_PORT);
48 outb(0x07, DATA_PORT);
49
50 /* Select logical device 4 */
51 outb(0x07, INDEX_PORT);
52 outb(0x04, DATA_PORT);
53
54 /* UART1 high speed mode */
55 outb(0xf0, INDEX_PORT);
56 outb(0x02, DATA_PORT);
57
58 /* Select logical device 5 */
59 outb(0x07, INDEX_PORT);
60 outb(0x05, DATA_PORT);
61
62 /* UART2 high speed mode */
63 outb(0xf0, INDEX_PORT);
64 outb(0x02, DATA_PORT);
65
66 /* Set Aladdin to RUN mode */
67 outb(0xbb, CFG_PORT);
68 }
69
70 return 0;
71 }
72
73 __initcall(cats_hw_init);
74
75 /*
76 * CATS uses soft-reboot by default, since
77 * hard reboots fail on early boards.
78 */
79 static void __init
fixup_cats(struct tag * tags,char ** cmdline)80 fixup_cats(struct tag *tags, char **cmdline)
81 {
82 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
83 screen_info.orig_video_lines = 25;
84 screen_info.orig_video_points = 16;
85 screen_info.orig_y = 24;
86 #endif
87 }
88
89 MACHINE_START(CATS, "Chalice-CATS")
90 /* Maintainer: Philip Blundell */
91 .atag_offset = 0x100,
92 .reboot_mode = REBOOT_SOFT,
93 .fixup = fixup_cats,
94 .map_io = footbridge_map_io,
95 .init_irq = footbridge_init_irq,
96 .init_time = isa_timer_init,
97 .restart = footbridge_restart,
98 MACHINE_END
99