1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * linux/arch/arm/mach-footbridge/cats-hw.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * CATS machine fixup
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Copyright (C) 1998, 1999 Russell King, Phil Blundell
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun #include <linux/ioport.h>
10*4882a593Smuzhiyun #include <linux/kernel.h>
11*4882a593Smuzhiyun #include <linux/init.h>
12*4882a593Smuzhiyun #include <linux/screen_info.h>
13*4882a593Smuzhiyun #include <linux/io.h>
14*4882a593Smuzhiyun #include <linux/spinlock.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include <asm/hardware/dec21285.h>
17*4882a593Smuzhiyun #include <asm/mach-types.h>
18*4882a593Smuzhiyun #include <asm/setup.h>
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #include <asm/mach/arch.h>
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #include "common.h"
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun #define CFG_PORT 0x370
25*4882a593Smuzhiyun #define INDEX_PORT (CFG_PORT)
26*4882a593Smuzhiyun #define DATA_PORT (CFG_PORT + 1)
27*4882a593Smuzhiyun
cats_hw_init(void)28*4882a593Smuzhiyun static int __init cats_hw_init(void)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun if (machine_is_cats()) {
31*4882a593Smuzhiyun /* Set Aladdin to CONFIGURE mode */
32*4882a593Smuzhiyun outb(0x51, CFG_PORT);
33*4882a593Smuzhiyun outb(0x23, CFG_PORT);
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun /* Select logical device 3 */
36*4882a593Smuzhiyun outb(0x07, INDEX_PORT);
37*4882a593Smuzhiyun outb(0x03, DATA_PORT);
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun /* Set parallel port to DMA channel 3, ECP+EPP1.9,
40*4882a593Smuzhiyun enable EPP timeout */
41*4882a593Smuzhiyun outb(0x74, INDEX_PORT);
42*4882a593Smuzhiyun outb(0x03, DATA_PORT);
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun outb(0xf0, INDEX_PORT);
45*4882a593Smuzhiyun outb(0x0f, DATA_PORT);
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun outb(0xf1, INDEX_PORT);
48*4882a593Smuzhiyun outb(0x07, DATA_PORT);
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun /* Select logical device 4 */
51*4882a593Smuzhiyun outb(0x07, INDEX_PORT);
52*4882a593Smuzhiyun outb(0x04, DATA_PORT);
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun /* UART1 high speed mode */
55*4882a593Smuzhiyun outb(0xf0, INDEX_PORT);
56*4882a593Smuzhiyun outb(0x02, DATA_PORT);
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun /* Select logical device 5 */
59*4882a593Smuzhiyun outb(0x07, INDEX_PORT);
60*4882a593Smuzhiyun outb(0x05, DATA_PORT);
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun /* UART2 high speed mode */
63*4882a593Smuzhiyun outb(0xf0, INDEX_PORT);
64*4882a593Smuzhiyun outb(0x02, DATA_PORT);
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun /* Set Aladdin to RUN mode */
67*4882a593Smuzhiyun outb(0xbb, CFG_PORT);
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun return 0;
71*4882a593Smuzhiyun }
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun __initcall(cats_hw_init);
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun /*
76*4882a593Smuzhiyun * CATS uses soft-reboot by default, since
77*4882a593Smuzhiyun * hard reboots fail on early boards.
78*4882a593Smuzhiyun */
79*4882a593Smuzhiyun static void __init
fixup_cats(struct tag * tags,char ** cmdline)80*4882a593Smuzhiyun fixup_cats(struct tag *tags, char **cmdline)
81*4882a593Smuzhiyun {
82*4882a593Smuzhiyun #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
83*4882a593Smuzhiyun screen_info.orig_video_lines = 25;
84*4882a593Smuzhiyun screen_info.orig_video_points = 16;
85*4882a593Smuzhiyun screen_info.orig_y = 24;
86*4882a593Smuzhiyun #endif
87*4882a593Smuzhiyun }
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun MACHINE_START(CATS, "Chalice-CATS")
90*4882a593Smuzhiyun /* Maintainer: Philip Blundell */
91*4882a593Smuzhiyun .atag_offset = 0x100,
92*4882a593Smuzhiyun .reboot_mode = REBOOT_SOFT,
93*4882a593Smuzhiyun .fixup = fixup_cats,
94*4882a593Smuzhiyun .map_io = footbridge_map_io,
95*4882a593Smuzhiyun .init_irq = footbridge_init_irq,
96*4882a593Smuzhiyun .init_time = isa_timer_init,
97*4882a593Smuzhiyun .restart = footbridge_restart,
98*4882a593Smuzhiyun MACHINE_END
99