2 * Ralink RT305x SoC specific setup
4 * Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
6 * Parts of this file are based on Ralink's 2.6.21 BSP
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published
10 * by the Free Software Foundation.
13 #include <linux/kernel.h>
14 #include <linux/init.h>
16 #include <linux/serial_8250.h>
18 #include <asm/bootinfo.h>
19 #include <asm/mips_machine.h>
20 #include <asm/reboot.h>
23 #include <asm/mach-ralink/rt305x.h>
24 #include <asm/mach-ralink/rt305x_regs.h>
28 enum rt305x_mach_type rt305x_mach
;
30 static void rt305x_restart(char *command
)
32 rt305x_sysc_wr(RT305X_RESET_SYSTEM
, SYSC_REG_RESET_CTRL
);
38 static void rt305x_halt(void)
45 static void __init
rt305x_detect_mem_size(void)
49 for (size
= RT305X_MEM_SIZE_MIN
; size
< RT305X_MEM_SIZE_MAX
;
51 if (!memcmp(rt305x_detect_mem_size
,
52 rt305x_detect_mem_size
+ size
, 1024))
56 add_memory_region(RT305X_SDRAM_BASE
, size
, BOOT_MEM_RAM
);
59 static void __init
rt305x_early_serial_setup(void)
64 memset(&p
, 0, sizeof(p
));
65 p
.flags
= UPF_SKIP_TEST
;
67 p
.uartclk
= rt305x_sys_freq
;
71 p
.mapbase
= RT305X_UART0_BASE
;
72 p
.membase
= ioremap_nocache(p
.mapbase
, RT305X_UART0_SIZE
);
74 p
.irq
= RT305X_INTC_IRQ_UART0
;
76 err
= early_serial_setup(&p
);
78 printk(KERN_ERR
"RT305x: early UART0 registration failed %d\n",
81 p
.mapbase
= RT305X_UART1_BASE
;
82 p
.membase
= ioremap_nocache(p
.mapbase
, RT305X_UART1_SIZE
);
84 p
.irq
= RT305X_INTC_IRQ_UART1
;
86 err
= early_serial_setup(&p
);
88 printk(KERN_ERR
"RT305x: early UART1 registration failed %d\n",
92 const char *get_system_type(void)
94 return rt305x_sys_type
;
97 unsigned int __cpuinit
get_c0_compare_irq(void)
99 return CP0_LEGACY_COMPARE_IRQ
;
102 void __init
plat_mem_setup(void)
104 set_io_port_base(KSEG1
);
106 rt305x_intc_base
= ioremap_nocache(RT305X_INTC_BASE
, PAGE_SIZE
);
107 rt305x_sysc_base
= ioremap_nocache(RT305X_SYSC_BASE
, PAGE_SIZE
);
108 rt305x_memc_base
= ioremap_nocache(RT305X_MEMC_BASE
, PAGE_SIZE
);
110 rt305x_detect_mem_size();
111 rt305x_detect_sys_type();
112 rt305x_detect_sys_freq();
114 printk(KERN_INFO
"%s running at %lu.%02lu MHz\n", get_system_type(),
115 rt305x_cpu_freq
/ 1000000,
116 (rt305x_cpu_freq
% 1000000) * 100 / 1000000);
118 _machine_restart
= rt305x_restart
;
119 _machine_halt
= rt305x_halt
;
120 pm_power_off
= rt305x_halt
;
122 rt305x_early_serial_setup();
125 void __init
plat_time_init(void)
127 mips_hpt_frequency
= rt305x_cpu_freq
/ 2;
130 static int __init
rt305x_machine_setup(void)
132 mips_machine_setup(rt305x_mach
);
137 arch_initcall(rt305x_machine_setup
);