target/linux/rb532/files/arch/mips/rb500/prom.c

   1 /*
   2 * prom.c
   3 **********************************************************************
   4 * P . Sadik Oct 10, 2003
   5 *
   6 * Started change log
   7 * idt_cpu_freq is make a kernel configuration parameter
   8 * idt_cpu_freq is exported so that other modules can use it.
   9 * Code cleanup
  10 **********************************************************************
  11 * P. Sadik Oct 20, 2003
  12 *
  13 * Removed NVRAM code from here, since they are already available under
  14 * nvram directory.
  15 * Added serial port initialisation.
  16 **********************************************************************
  17 **********************************************************************
  18 * P. Sadik Oct 30, 2003
  19 *
  20 * Added reset_cons_port
  21 **********************************************************************
  22
  23   P.Christeas, 2005-2006
  24   Port to 2.6, add 2.6 cmdline parsing
  25
  26 */
  27
  28 #include <linux/autoconf.h>
  29 #include <linux/init.h>
  30 #include <linux/mm.h>
  31 #include <linux/module.h>
  32 #include <linux/string.h>
  33 #include <linux/console.h>
  34 #include <asm/bootinfo.h>
  35 #include <linux/bootmem.h>
  36 #include <linux/ioport.h>
  37 #include <linux/blkdev.h>
  38 #include <asm/rc32434/ddr.h>
  39
  40 #define PROM_ENTRY(x)   (0xbfc00000+((x)*8))
  41 extern void __init setup_serial_port(void);
  42
  43 unsigned int idt_cpu_freq = 132000000;
  44 EXPORT_SYMBOL(idt_cpu_freq);
  45 char *board_type;
  46 EXPORT_SYMBOL(board_type);
  47 unsigned int gpio_bootup_state = 0;
  48 EXPORT_SYMBOL(gpio_bootup_state);
  49
  50
  51 char mips_mac_address[18] = "08:00:06:05:40:01";
  52 EXPORT_SYMBOL(mips_mac_address);
  53
  54 /* what to append to cmdline when button is [not] pressed */
  55 #define GPIO_INIT_NOBUTTON ""
  56 #define GPIO_INIT_BUTTON   " 2"
  57
  58 #ifdef CONFIG_MIKROTIK_RB500
  59 unsigned soft_reboot = 0;
  60 EXPORT_SYMBOL(soft_reboot);
  61 #endif
  62
  63 #define SR_NMI                  0x00180000      /* NMI */
  64 #define SERIAL_SPEED_ENTRY      0x00000001
  65
  66 #ifdef CONFIG_REMOTE_DEBUG
  67 extern int remote_debug;
  68 #endif
  69
  70 extern unsigned long mips_machgroup;
  71 extern unsigned long mips_machtype;
  72
  73 #define FREQ_TAG   "HZ="
  74 #define GPIO_TAG   "gpio="
  75 #define KMAC_TAG   "kmac="
  76 #define MEM_TAG    "mem="
  77 #define BOARD_TAG  "board="
  78 #define IGNORE_CMDLINE_MEM 1
  79 #define DEBUG_DDR
  80
  81 void parse_soft_settings(unsigned *ptr, unsigned size);
  82 void parse_hard_settings(unsigned *ptr, unsigned size);
  83
  84 void __init prom_setup_cmdline(void);
  85
  86 void __init prom_init(void)
  87 {
  88         DDR_t ddr = (DDR_t) DDR_VirtualAddress; /* define the pointer to the DDR registers */
  89         phys_t memsize = 0-ddr->ddrmask;
  90
  91         /* this should be the very first message, even before serial is properly initialized */
  92         prom_setup_cmdline();
  93         setup_serial_port();
  94
  95         mips_machgroup = MACH_GROUP_MIKROTIK;
  96         soft_reboot = read_c0_status() & SR_NMI;
  97         pm_power_off = NULL;
  98
  99         /*
 100          * give all RAM to boot allocator,
 101          * except for the first 0x400 and the last 0x200 bytes
 102          */
 103         add_memory_region(ddr->ddrbase + 0x400, memsize - 0x600, BOOT_MEM_RAM);
 104 }
 105
 106 void __init prom_free_prom_memory(void)
 107 {
 108         /* No prom memory to free */
 109 }
 110
 111 extern char _image_cmdline;
 112 void __init prom_setup_cmdline(void){
 113         char cmd_line[CL_SIZE];
 114         char *cp;
 115         int prom_argc;
 116         char **prom_argv, **prom_envp;
 117         int i;
 118
 119         prom_argc = fw_arg0;
 120         prom_argv = (char **) fw_arg1;
 121         prom_envp = (char **) fw_arg2;
 122
 123         cp=cmd_line;
 124                 /* Note: it is common that parameters start at argv[1] and not argv[0],
 125                 however, our elf loader starts at [0] */
 126         for(i=0;i<prom_argc;i++){
 127                 if (strncmp(prom_argv[i], FREQ_TAG, sizeof(FREQ_TAG) - 1) == 0) {
 128                         idt_cpu_freq = simple_strtoul(prom_argv[i] + sizeof(FREQ_TAG) - 1, 0, 10);
 129                         continue;
 130                 }
 131 #ifdef IGNORE_CMDLINE_MEM
 132                 /* parses out the "mem=xx" arg */
 133                 if (strncmp(prom_argv[i], MEM_TAG, sizeof(MEM_TAG) - 1) == 0) {
 134                         continue;
 135                 }
 136 #endif
 137                 if (i>0) *(cp++) = ' ';
 138                 if (strncmp(prom_argv[i], BOARD_TAG, sizeof(BOARD_TAG) - 1) == 0) {
 139                         strcpy(board_type, prom_argv[i] + sizeof(BOARD_TAG) -1);
 140                 }
 141                 if (strncmp(prom_argv[i], GPIO_TAG, sizeof(GPIO_TAG) - 1) == 0) {
 142                         gpio_bootup_state =  simple_strtoul(prom_argv[i] + sizeof(GPIO_TAG) - 1, 0, 10);
 143                 }
 144                 strcpy(cp,prom_argv[i]);
 145                 cp+=strlen(prom_argv[i]);
 146         }
 147         *(cp++) = ' ';
 148         strcpy(cp,(&_image_cmdline + 8));
 149         cp += strlen(&_image_cmdline);
 150
 151         i=strlen(arcs_cmdline);
 152         if (i>0){
 153                 *(cp++) = ' ';
 154                 strcpy(cp,arcs_cmdline);
 155                 cp+=strlen(arcs_cmdline);
 156         }
 157         if (gpio_bootup_state&0x02)
 158                 strcpy(cp,GPIO_INIT_NOBUTTON);
 159         else
 160                 strcpy(cp,GPIO_INIT_BUTTON);
 161         cmd_line[CL_SIZE-1] = '\0';
 162
 163         strcpy(arcs_cmdline,cmd_line);
 164 }
 165