1 /*
2 * arch/mips/emma2rh/markeins/setup.c
3 * This file is setup for EMMA2RH Mark-eins.
4 *
5 * Copyright (C) NEC Electronics Corporation 2004-2006
6 *
7 * This file is based on the arch/mips/ddb5xxx/ddb5477/setup.c.
8 *
9 * Copyright 2001 MontaVista Software Inc.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 */
25 #include <linux/init.h>
26 #include <linux/kernel.h>
27 #include <linux/types.h>
28
29 #include <asm/time.h>
30 #include <asm/reboot.h>
31
32 #include <asm/emma/emma2rh.h>
33
34 #define USE_CPU_COUNTER_TIMER /* whether we use cpu counter */
35
36 extern void markeins_led(const char *);
37
38 static int bus_frequency = 0;
39
markeins_machine_restart(char * command)40 static void markeins_machine_restart(char *command)
41 {
42 static void (*back_to_prom) (void) = (void (*)(void))0xbfc00000;
43
44 printk("cannot EMMA2RH Mark-eins restart.\n");
45 markeins_led("restart.");
46 back_to_prom();
47 }
48
markeins_machine_halt(void)49 static void markeins_machine_halt(void)
50 {
51 printk("EMMA2RH Mark-eins halted.\n");
52 markeins_led("halted.");
53 while (1) ;
54 }
55
markeins_machine_power_off(void)56 static void markeins_machine_power_off(void)
57 {
58 printk("EMMA2RH Mark-eins halted. Please turn off the power.\n");
59 markeins_led("poweroff.");
60 while (1) ;
61 }
62
63 static unsigned long __initdata emma2rh_clock[4] = {
64 166500000, 187312500, 199800000, 210600000
65 };
66
detect_bus_frequency(unsigned long rtc_base)67 static unsigned int __init detect_bus_frequency(unsigned long rtc_base)
68 {
69 u32 reg;
70
71 /* detect from boot strap */
72 reg = emma2rh_in32(EMMA2RH_BHIF_STRAP_0);
73 reg = (reg >> 4) & 0x3;
74
75 return emma2rh_clock[reg];
76 }
77
plat_time_init(void)78 void __init plat_time_init(void)
79 {
80 u32 reg;
81 if (bus_frequency == 0)
82 bus_frequency = detect_bus_frequency(0);
83
84 reg = emma2rh_in32(EMMA2RH_BHIF_STRAP_0);
85 if ((reg & 0x3) == 0)
86 reg = (reg >> 6) & 0x3;
87 else {
88 reg = emma2rh_in32(EMMA2RH_BHIF_MAIN_CTRL);
89 reg = (reg >> 4) & 0x3;
90 }
91 mips_hpt_frequency = (bus_frequency * (4 + reg)) / 4 / 2;
92 }
93
94 static void markeins_board_init(void);
95 extern void markeins_irq_setup(void);
96
markeins_sio_setup(void)97 static void inline __init markeins_sio_setup(void)
98 {
99 }
100
plat_mem_setup(void)101 void __init plat_mem_setup(void)
102 {
103 /* initialize board - we don't trust the loader */
104 markeins_board_init();
105
106 set_io_port_base(KSEG1ADDR(EMMA2RH_PCI_IO_BASE));
107
108 _machine_restart = markeins_machine_restart;
109 _machine_halt = markeins_machine_halt;
110 pm_power_off = markeins_machine_power_off;
111
112 /* setup resource limits */
113 ioport_resource.start = EMMA2RH_PCI_IO_BASE;
114 ioport_resource.end = EMMA2RH_PCI_IO_BASE + EMMA2RH_PCI_IO_SIZE - 1;
115 iomem_resource.start = EMMA2RH_IO_BASE;
116 iomem_resource.end = EMMA2RH_ROM_BASE - 1;
117
118 /* Reboot on panic */
119 panic_timeout = 180;
120
121 markeins_sio_setup();
122 }
123
markeins_board_init(void)124 static void __init markeins_board_init(void)
125 {
126 u32 val;
127
128 val = emma2rh_in32(EMMA2RH_PBRD_INT_EN); /* open serial interrupts. */
129 emma2rh_out32(EMMA2RH_PBRD_INT_EN, val | 0xaa);
130 val = emma2rh_in32(EMMA2RH_PBRD_CLKSEL); /* set serial clocks. */
131 emma2rh_out32(EMMA2RH_PBRD_CLKSEL, val | 0x5); /* 18MHz */
132 emma2rh_out32(EMMA2RH_PCI_CONTROL, 0);
133
134 markeins_led("MVL E2RH");
135 }
136