summaryrefslogtreecommitdiff
path: root/board/cds/common/cadmus.c
blob: 5f86de5af22ff4129bf36898f65d25d7208b557e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
/*
 * Copyright 2004 Freescale Semiconductor.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */


#include <common.h>


/*
 * CADMUS Board System Registers
 */
#ifndef CFG_CADMUS_BASE_REG
#define CFG_CADMUS_BASE_REG	(CADMUS_BASE_ADDR + 0x4000)
#endif

typedef struct cadmus_reg {
    u_char cm_ver;		/* Board version */
    u_char cm_csr;		/* General control/status */
    u_char cm_rst;		/* Reset control */
    u_char cm_hsclk;		/* High speed clock */
    u_char cm_hsxclk;		/* High speed clock extended */
    u_char cm_led;		/* LED data */
    u_char cm_pci;		/* PCI control/status */
    u_char cm_dma;		/* DMA control */
    u_char cm_reserved[248];	/* Total 256 bytes */
} cadmus_reg_t;


unsigned int
get_board_version(void)
{
	volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CFG_CADMUS_BASE_REG;

	return cadmus->cm_ver;
}


unsigned long
get_clock_freq(void)
{
	volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CFG_CADMUS_BASE_REG;

	uint pci1_speed = (cadmus->cm_pci >> 2) & 0x3; /* PSPEED in [4:5] */

	if (pci1_speed == 0) {
		return 33000000;
	} else if (pci1_speed == 1) {
		return 66000000;
	} else {
		/* Really, unknown. Be safe? */
		return 33000000;
	}
}


unsigned int
get_pci_slot(void)
{
	volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CFG_CADMUS_BASE_REG;

	/*
	 * PCI slot in USER bits CSR[6:7] by convention.
	 */
	return ((cadmus->cm_csr >> 6) & 0x3) + 1;
}


unsigned int
get_pci_dual(void)
{
	volatile cadmus_reg_t *cadmus = (cadmus_reg_t *)CFG_CADMUS_BASE_REG;

	/*
	 * PCI DUAL in CM_PCI[3]
	 */
	return cadmus->cm_pci & 0x10;
}