1 /*
2 * Copyright (C) NEC Electronics Corporation 2004-2006
3 *
4 * This file is based on the arch/mips/ddb5xxx/ddb5477/setup.c.
5 *
6 * Copyright 2001 MontaVista Software Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22 #include <linux/init.h>
23 #include <linux/kernel.h>
24 #include <linux/types.h>
25
26 #include <asm/time.h>
27 #include <asm/reboot.h>
28
29 #include <asm/emma/emma2rh.h>
30
31 #define USE_CPU_COUNTER_TIMER /* whether we use cpu counter */
32
33 extern void markeins_led(const char *);
34
35 static int bus_frequency;
36
markeins_machine_restart(char * command)37 static void markeins_machine_restart(char *command)
38 {
39 static void (*back_to_prom) (void) = (void (*)(void))0xbfc00000;
40
41 printk("cannot EMMA2RH Mark-eins restart.\n");
42 markeins_led("restart.");
43 back_to_prom();
44 }
45
markeins_machine_halt(void)46 static void markeins_machine_halt(void)
47 {
48 printk("EMMA2RH Mark-eins halted.\n");
49 markeins_led("halted.");
50 while (1) ;
51 }
52
markeins_machine_power_off(void)53 static void markeins_machine_power_off(void)
54 {
55 markeins_led("poweroff.");
56 while (1) ;
57 }
58
59 static unsigned long __initdata emma2rh_clock[4] = {
60 166500000, 187312500, 199800000, 210600000
61 };
62
detect_bus_frequency(unsigned long rtc_base)63 static unsigned int __init detect_bus_frequency(unsigned long rtc_base)
64 {
65 u32 reg;
66
67 /* detect from boot strap */
68 reg = emma2rh_in32(EMMA2RH_BHIF_STRAP_0);
69 reg = (reg >> 4) & 0x3;
70
71 return emma2rh_clock[reg];
72 }
73
plat_time_init(void)74 void __init plat_time_init(void)
75 {
76 u32 reg;
77 if (bus_frequency == 0)
78 bus_frequency = detect_bus_frequency(0);
79
80 reg = emma2rh_in32(EMMA2RH_BHIF_STRAP_0);
81 if ((reg & 0x3) == 0)
82 reg = (reg >> 6) & 0x3;
83 else {
84 reg = emma2rh_in32(EMMA2RH_BHIF_MAIN_CTRL);
85 reg = (reg >> 4) & 0x3;
86 }
87 mips_hpt_frequency = (bus_frequency * (4 + reg)) / 4 / 2;
88 }
89
90 static void markeins_board_init(void);
91 extern void markeins_irq_setup(void);
92
markeins_sio_setup(void)93 static void inline __init markeins_sio_setup(void)
94 {
95 }
96
plat_mem_setup(void)97 void __init plat_mem_setup(void)
98 {
99 /* initialize board - we don't trust the loader */
100 markeins_board_init();
101
102 set_io_port_base(KSEG1ADDR(EMMA2RH_PCI_IO_BASE));
103
104 _machine_restart = markeins_machine_restart;
105 _machine_halt = markeins_machine_halt;
106 pm_power_off = markeins_machine_power_off;
107
108 /* setup resource limits */
109 ioport_resource.start = EMMA2RH_PCI_IO_BASE;
110 ioport_resource.end = EMMA2RH_PCI_IO_BASE + EMMA2RH_PCI_IO_SIZE - 1;
111 iomem_resource.start = EMMA2RH_IO_BASE;
112 iomem_resource.end = EMMA2RH_ROM_BASE - 1;
113
114 /* Reboot on panic */
115 panic_timeout = 180;
116
117 markeins_sio_setup();
118 }
119
markeins_board_init(void)120 static void __init markeins_board_init(void)
121 {
122 u32 val;
123
124 val = emma2rh_in32(EMMA2RH_PBRD_INT_EN); /* open serial interrupts. */
125 emma2rh_out32(EMMA2RH_PBRD_INT_EN, val | 0xaa);
126 val = emma2rh_in32(EMMA2RH_PBRD_CLKSEL); /* set serial clocks. */
127 emma2rh_out32(EMMA2RH_PBRD_CLKSEL, val | 0x5); /* 18MHz */
128 emma2rh_out32(EMMA2RH_PCI_CONTROL, 0);
129
130 markeins_led("MVL E2RH");
131 }
132