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