Linux Kernel  3.7.1
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cats-hw.c
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1 /*
2  * linux/arch/arm/mach-footbridge/cats-hw.c
3  *
4  * CATS machine fixup
5  *
6  * Copyright (C) 1998, 1999 Russell King, Phil Blundell
7  */
8 #include <linux/ioport.h>
9 #include <linux/kernel.h>
10 #include <linux/init.h>
11 #include <linux/screen_info.h>
12 #include <linux/io.h>
13 #include <linux/spinlock.h>
14 
15 #include <asm/hardware/dec21285.h>
16 #include <asm/mach-types.h>
17 #include <asm/setup.h>
18 
19 #include <asm/mach/arch.h>
20 
21 #include "common.h"
22 
23 #define CFG_PORT 0x370
24 #define INDEX_PORT (CFG_PORT)
25 #define DATA_PORT (CFG_PORT + 1)
26 
27 static int __init cats_hw_init(void)
28 {
29  if (machine_is_cats()) {
30  /* Set Aladdin to CONFIGURE mode */
31  outb(0x51, CFG_PORT);
32  outb(0x23, CFG_PORT);
33 
34  /* Select logical device 3 */
35  outb(0x07, INDEX_PORT);
36  outb(0x03, DATA_PORT);
37 
38  /* Set parallel port to DMA channel 3, ECP+EPP1.9,
39  enable EPP timeout */
40  outb(0x74, INDEX_PORT);
41  outb(0x03, DATA_PORT);
42 
43  outb(0xf0, INDEX_PORT);
44  outb(0x0f, DATA_PORT);
45 
46  outb(0xf1, INDEX_PORT);
47  outb(0x07, DATA_PORT);
48 
49  /* Select logical device 4 */
50  outb(0x07, INDEX_PORT);
51  outb(0x04, DATA_PORT);
52 
53  /* UART1 high speed mode */
54  outb(0xf0, INDEX_PORT);
55  outb(0x02, DATA_PORT);
56 
57  /* Select logical device 5 */
58  outb(0x07, INDEX_PORT);
59  outb(0x05, DATA_PORT);
60 
61  /* UART2 high speed mode */
62  outb(0xf0, INDEX_PORT);
63  outb(0x02, DATA_PORT);
64 
65  /* Set Aladdin to RUN mode */
66  outb(0xbb, CFG_PORT);
67  }
68 
69  return 0;
70 }
71 
72 __initcall(cats_hw_init);
73 
74 /*
75  * CATS uses soft-reboot by default, since
76  * hard reboots fail on early boards.
77  */
78 static void __init
79 fixup_cats(struct tag *tags, char **cmdline, struct meminfo *mi)
80 {
81  screen_info.orig_video_lines = 25;
82  screen_info.orig_video_points = 16;
83  screen_info.orig_y = 24;
84 }
85 
86 MACHINE_START(CATS, "Chalice-CATS")
87  /* Maintainer: Philip Blundell */
88  .atag_offset = 0x100,
89  .restart_mode = 's',
90  .fixup = fixup_cats,
91  .map_io = footbridge_map_io,
92  .init_irq = footbridge_init_irq,
93  .timer = &isa_timer,
94  .restart = footbridge_restart,
95 MACHINE_END
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