target/linux/ramips/files/arch/mips/ralink/common/setup.c

   1 /*
   2  * Ralink SoC common setup
   3  *
   4  * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
   5  * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published
   9  * by the Free Software Foundation.
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/io.h>
  15 #include <linux/serial_8250.h>
  16
  17 #include <asm/bootinfo.h>
  18 #include <asm/addrspace.h>
  19 #include <asm/mips_machine.h>
  20
  21 #include <asm/mach-ralink/common.h>
  22 #include <asm/mach-ralink/machine.h>
  23 #include <ralink_soc.h>
  24
  25 unsigned char ramips_sys_type[RAMIPS_SYS_TYPE_LEN];
  26 enum ramips_mach_type ramips_mach = RAMIPS_MACH_GENERIC;
  27
  28 const char *get_system_type(void)
  29 {
  30         return ramips_sys_type;
  31 }
  32
  33 static void __init detect_mem_size(void)
  34 {
  35         unsigned long size;
  36
  37         for (size = RALINK_SOC_MEM_SIZE_MIN; size < RALINK_SOC_MEM_SIZE_MAX;
  38              size <<= 1 ) {
  39                 if (!memcmp(detect_mem_size,
  40                             detect_mem_size + size, 1024))
  41                         break;
  42         }
  43
  44         add_memory_region(RALINK_SOC_SDRAM_BASE, size, BOOT_MEM_RAM);
  45 }
  46
  47 void __init ramips_early_serial_setup(int line, unsigned base, unsigned freq,
  48                                       unsigned irq)
  49 {
  50         struct uart_port p;
  51         int err;
  52
  53         memset(&p, 0, sizeof(p));
  54         p.flags         = UPF_SKIP_TEST;
  55         p.iotype        = UPIO_AU;
  56         p.uartclk       = freq;
  57         p.regshift      = 2;
  58         p.type          = PORT_16550A;
  59
  60         p.mapbase       = base;
  61         p.membase       = ioremap_nocache(p.mapbase, PAGE_SIZE);
  62         p.line          = line;
  63         p.irq           = irq;
  64
  65         err = early_serial_setup(&p);
  66         if (err)
  67                 printk(KERN_ERR "early serial%d registration failed %d\n",
  68                        line, err);
  69 }
  70
  71 void __init plat_mem_setup(void)
  72 {
  73         set_io_port_base(KSEG1);
  74
  75         detect_mem_size();
  76         ramips_soc_setup();
  77 }
  78
  79 static int __init ramips_machine_setup(void)
  80 {
  81         mips_machine_setup(ramips_mach);
  82         return 0;
  83 }
  84
  85 arch_initcall(ramips_machine_setup);
  86
  87 static void __init ramips_generic_init(void)
  88 {
  89 }
  90
  91 MIPS_MACHINE(RAMIPS_MACH_GENERIC, "Generic Ralink board", ramips_generic_init);