target/linux/ramips/files-3.7/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
  20 #include <asm/mach-ralink/common.h>
  21 #include <asm/mach-ralink/machine.h>
  22
  23 unsigned char ramips_sys_type[RAMIPS_SYS_TYPE_LEN];
  24 unsigned long (*ramips_get_mem_size)(void);
  25
  26 const char *get_system_type(void)
  27 {
  28         return ramips_sys_type;
  29 }
  30
  31 static void __init detect_mem_size(void)
  32 {
  33         unsigned long size;
  34
  35         if (ramips_get_mem_size) {
  36                 size = ramips_get_mem_size();
  37         } else {
  38                 void *base;
  39
  40                 base = (void *) KSEG1ADDR(detect_mem_size);
  41                 for (size = ramips_mem_size_min; size < ramips_mem_size_max;
  42                      size <<= 1 ) {
  43                         if (!memcmp(base, base + size, 1024))
  44                                 break;
  45                 }
  46         }
  47
  48         add_memory_region(ramips_mem_base, size, BOOT_MEM_RAM);
  49 }
  50
  51 void __init ramips_early_serial_setup(int line, unsigned base, unsigned freq,
  52                                       unsigned irq)
  53 {
  54         struct uart_port p;
  55         int err;
  56
  57         memset(&p, 0, sizeof(p));
  58         p.flags         = UPF_SKIP_TEST | UPF_FIXED_TYPE;
  59         p.iotype        = UPIO_AU;
  60         p.uartclk       = freq;
  61         p.regshift      = 2;
  62         p.type          = PORT_16550A;
  63
  64         p.mapbase       = base;
  65         p.membase       = ioremap_nocache(p.mapbase, PAGE_SIZE);
  66         p.line          = line;
  67         p.irq           = irq;
  68
  69         err = early_serial_setup(&p);
  70         if (err)
  71                 printk(KERN_ERR "early serial%d registration failed %d\n",
  72                        line, err);
  73 }
  74
  75 void __init plat_mem_setup(void)
  76 {
  77         set_io_port_base(KSEG1);
  78
  79         detect_mem_size();
  80         ramips_soc_setup();
  81 }
  82
  83 __setup("board=", mips_machtype_setup);
  84
  85 static int __init ramips_machine_setup(void)
  86 {
  87         mips_machine_setup();
  88         return 0;
  89 }
  90
  91 arch_initcall(ramips_machine_setup);
  92
  93 static void __init ramips_generic_init(void)
  94 {
  95 }
  96
  97 MIPS_MACHINE(RAMIPS_MACH_GENERIC, "Generic", "Generic Ralink board",
  98              ramips_generic_init);