[ramips] initial support for RT288x/RT305x

[openwrt.git] / target / linux / ramips / files / arch / mips / ralink / rt288x / setup.c

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 (file)
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);