xref: /openbmc/u-boot/arch/m68k/cpu/mcf523x/cpu.c (revision 9d86f0c3)
1 /*
2  *
3  * (C) Copyright 2000-2003
4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5  *
6  * Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
7  * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
8  *
9  * See file CREDITS for list of people who contributed to this
10  * project.
11  *
12  * This program is free software; you can redistribute it and/or
13  * modify it under the terms of the GNU General Public License as
14  * published by the Free Software Foundation; either version 2 of
15  * the License, or (at your option) any later version.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  * GNU General Public License for more details.
21  *
22  * You should have received a copy of the GNU General Public License
23  * along with this program; if not, write to the Free Software
24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25  * MA 02111-1307 USA
26  */
27 
28 #include <common.h>
29 #include <watchdog.h>
30 #include <command.h>
31 #include <netdev.h>
32 
33 #include <asm/immap.h>
34 #include <asm/io.h>
35 
36 DECLARE_GLOBAL_DATA_PTR;
37 
38 int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
39 {
40 	ccm_t *ccm = (ccm_t *) MMAP_CCM;
41 
42 	out_8(&ccm->rcr, CCM_RCR_SOFTRST);
43 	/* we don't return! */
44 	return 0;
45 }
46 
47 int checkcpu(void)
48 {
49 	ccm_t *ccm = (ccm_t *) MMAP_CCM;
50 	u16 msk;
51 	u16 id = 0;
52 	u8 ver;
53 
54 	puts("CPU:   ");
55 	msk = (in_be16(&ccm->cir) >> 6);
56 	ver = (in_be16(&ccm->cir) & 0x003f);
57 	switch (msk) {
58 	case 0x31:
59 		id = 5235;
60 		break;
61 	}
62 
63 	if (id) {
64 		char buf1[32], buf2[32];
65 
66 		printf("Freescale MCF%d (Mask:%01x Version:%x)\n", id, msk,
67 		       ver);
68 		printf("       CPU CLK %s MHz BUS CLK %s MHz\n",
69 		       strmhz(buf1, gd->cpu_clk),
70 		       strmhz(buf2, gd->bus_clk));
71 	}
72 
73 	return 0;
74 };
75 
76 #if defined(CONFIG_WATCHDOG)
77 /* Called by macro WATCHDOG_RESET */
78 void watchdog_reset(void)
79 {
80 	wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
81 
82 	/* Count register */
83 	out_be16(&wdp->sr, 0x5555);
84 	asm("nop");
85 	out_be16(&wdp->sr, 0xaaaa);
86 }
87 
88 int watchdog_disable(void)
89 {
90 	wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
91 
92 	/* UserManual, once the wdog is disabled, wdog cannot be re-enabled */
93 	/* halted watchdog timer */
94 	setbits_be16(&wdp->cr, WTM_WCR_HALTED);
95 
96 	puts("WATCHDOG:disabled\n");
97 	return (0);
98 }
99 
100 int watchdog_init(void)
101 {
102 	wdog_t *wdp = (wdog_t *) (MMAP_WDOG);
103 	u32 wdog_module = 0;
104 
105 	/* set timeout and enable watchdog */
106 	wdog_module = ((CONFIG_SYS_CLK / CONFIG_SYS_HZ) * CONFIG_WATCHDOG_TIMEOUT);
107 	wdog_module |= (wdog_module / 8192);
108 	out_be16(&wdp->mr, wdog_module);
109 
110 	out_be16(&wdp->cr, WTM_WCR_EN);
111 	puts("WATCHDOG:enabled\n");
112 
113 	return (0);
114 }
115 #endif				/* CONFIG_WATCHDOG */
116 
117 #if defined(CONFIG_MCFFEC)
118 /* Default initializations for MCFFEC controllers.  To override,
119  * create a board-specific function called:
120  * 	int board_eth_init(bd_t *bis)
121  */
122 
123 int cpu_eth_init(bd_t *bis)
124 {
125 	return mcffec_initialize(bis);
126 }
127 #endif
128