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/mips_machine.h>
19 #include <asm/reboot.h>
22 #include <asm/mach-ralink/common.h>
23 #include <asm/mach-ralink/rt305x.h>
24 #include <asm/mach-ralink/rt305x_regs.h>
26 static void rt305x_restart(char *command
)
28 rt305x_sysc_wr(RT305X_RESET_SYSTEM
, SYSC_REG_RESET_CTRL
);
34 static void rt305x_halt(void)
41 static void __init
rt305x_early_serial_setup(void)
46 memset(&p
, 0, sizeof(p
));
47 p
.flags
= UPF_SKIP_TEST
;
49 p
.uartclk
= rt305x_sys_freq
;
53 p
.mapbase
= RT305X_UART0_BASE
;
54 p
.membase
= ioremap_nocache(p
.mapbase
, RT305X_UART0_SIZE
);
56 p
.irq
= RT305X_INTC_IRQ_UART0
;
58 err
= early_serial_setup(&p
);
60 printk(KERN_ERR
"RT305x: early UART0 registration failed %d\n",
63 p
.mapbase
= RT305X_UART1_BASE
;
64 p
.membase
= ioremap_nocache(p
.mapbase
, RT305X_UART1_SIZE
);
66 p
.irq
= RT305X_INTC_IRQ_UART1
;
68 err
= early_serial_setup(&p
);
70 printk(KERN_ERR
"RT305x: early UART1 registration failed %d\n",
74 unsigned int __cpuinit
get_c0_compare_irq(void)
76 return CP0_LEGACY_COMPARE_IRQ
;
79 void __init
ramips_soc_setup(void)
81 rt305x_sysc_base
= ioremap_nocache(RT305X_SYSC_BASE
, PAGE_SIZE
);
82 rt305x_memc_base
= ioremap_nocache(RT305X_MEMC_BASE
, PAGE_SIZE
);
84 rt305x_detect_sys_type();
85 rt305x_detect_sys_freq();
87 printk(KERN_INFO
"%s running at %lu.%02lu MHz\n", ramips_sys_type
,
88 rt305x_cpu_freq
/ 1000000,
89 (rt305x_cpu_freq
% 1000000) * 100 / 1000000);
91 _machine_restart
= rt305x_restart
;
92 _machine_halt
= rt305x_halt
;
93 pm_power_off
= rt305x_halt
;
95 rt305x_early_serial_setup();
98 void __init
plat_time_init(void)
100 mips_hpt_frequency
= rt305x_cpu_freq
/ 2;