diff options
Diffstat (limited to 'target/linux/ramips/files/arch/mips/ralink/rt288x/setup.c')
| -rw-r--r-- | target/linux/ramips/files/arch/mips/ralink/rt288x/setup.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/target/linux/ramips/files/arch/mips/ralink/rt288x/setup.c b/target/linux/ramips/files/arch/mips/ralink/rt288x/setup.c new file mode 100644 index 0000000..186db29 --- /dev/null +++ b/target/linux/ramips/files/arch/mips/ralink/rt288x/setup.c @@ -0,0 +1,142 @@ +/* + * Ralink RT288x SoC specific setup + * + * Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org> + * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> + * + * Parts of this file are based on Ralink's 2.6.21 BSP + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/serial_8250.h> + +#include <asm/bootinfo.h> +#include <asm/mips_machine.h> +#include <asm/reboot.h> +#include <asm/time.h> + +#include <asm/mach-ralink/rt288x.h> +#include <asm/mach-ralink/rt288x_regs.h> + +#define RT288X_MEM_SIZE_MIN (2 * 1024 * 1024) +#define RT288X_MEM_SIZE_MAX (128 * 1024 * 1024) + +unsigned long rt288x_mach_type; + +static void rt288x_restart(char *command) +{ + rt288x_sysc_wr(RT2880_RESET_SYSTEM, SYSC_REG_RESET_CTRL); + while (1) + if (cpu_wait) + cpu_wait(); +} + +static void rt288x_halt(void) +{ + while (1) + cpu_wait(); +} + +static void __init rt288x_detect_mem_size(void) +{ + unsigned long size; + + for (size = RT288X_MEM_SIZE_MIN; size < RT288X_MEM_SIZE_MAX; + size <<= 1 ) { + if (!memcmp(rt288x_detect_mem_size, + rt288x_detect_mem_size + size, 1024)) + break; + } + + add_memory_region(RT2880_SDRAM_BASE, size, BOOT_MEM_RAM); +} + +#ifdef CONFIG_RT288X_EARLY_SERIAL +static void __init rt288x_early_serial_setup(void) +{ + struct uart_port p; + int err; + + memset(&p, 0, sizeof(p)); + p.flags = UPF_SKIP_TEST; + p.iotype = UPIO_AU; + p.uartclk = rt288x_sys_freq; + p.regshift = 2; + p.type = PORT_16550A; + + p.mapbase = RT2880_UART0_BASE; + p.membase = ioremap_nocache(p.mapbase, RT2880_UART0_SIZE); + p.line = 0; + p.irq = RT2880_INTC_IRQ_UART0; + + err = early_serial_setup(&p); + if (err) + printk(KERN_ERR "RT288x: early UART0 registration failed %d\n", + err); + + p.mapbase = RT2880_UART1_BASE; + p.membase = ioremap_nocache(p.mapbase, RT2880_UART1_SIZE); + p.line = 1; + p.irq = RT2880_INTC_IRQ_UART1; + + err = early_serial_setup(&p); + if (err) + printk(KERN_ERR "RT288x: early UART1 registration failed %d\n", + err); +} +#else +static inline void rt288x_early_serial_setup(void) {}; +#endif /* CONFIG_RT288X_EARLY_SERIAL */ + +const char *get_system_type(void) +{ + return rt288x_sys_type; +} + +unsigned int __cpuinit get_c0_compare_irq(void) +{ + return CP0_LEGACY_COMPARE_IRQ; +} + +void __init plat_mem_setup(void) +{ + set_io_port_base(KSEG1); + + rt288x_intc_base = ioremap_nocache(RT2880_INTC_BASE, RT2880_INTC_SIZE); + rt288x_sysc_base = ioremap_nocache(RT2880_SYSC_BASE, RT2880_SYSC_SIZE); + rt288x_memc_base = ioremap_nocache(RT2880_MEMC_BASE, RT2880_MEMC_SIZE); + + rt288x_detect_mem_size(); + rt288x_detect_sys_type(); + rt288x_detect_sys_freq(); + + printk(KERN_INFO "%s running at %lu.%02lu MHz\n", get_system_type(), + rt288x_cpu_freq / 1000000, + (rt288x_cpu_freq % 1000000) * 100 / 1000000); + + _machine_restart = rt288x_restart; + _machine_halt = rt288x_halt; + pm_power_off = rt288x_halt; + + rt288x_early_serial_setup(); +} + +void __init plat_time_init(void) +{ + mips_hpt_frequency = rt288x_cpu_freq / 2; +} + +static int __init rt288x_machine_setup(void) +{ + mips_machine_setup(rt288x_mach_type); + + return 0; +} + +arch_initcall(rt288x_machine_setup); |