arch/mips/alchemy/devboards/db1235.c

   1 /*
   2  * DB1200/PB1200 / DB1550 / DB1300 board support.
   3  *
   4  * These 4 boards can reliably be supported in a single kernel image.
   5  */
   6
   7 #include <asm/mach-au1x00/au1000.h>
   8 #include <asm/mach-db1x00/bcsr.h>
   9
  10 int __init db1200_board_setup(void);
  11 int __init db1200_dev_setup(void);
  12 int __init db1300_board_setup(void);
  13 int __init db1300_dev_setup(void);
  14 int __init db1550_board_setup(void);
  15 int __init db1550_dev_setup(void);
  16 int __init db1550_pci_setup(int);
  17
  18 static const char *board_type_str(void)
  19 {
  20         switch (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI))) {
  21         case BCSR_WHOAMI_PB1200_DDR1:
  22         case BCSR_WHOAMI_PB1200_DDR2:
  23                 return "PB1200";
  24         case BCSR_WHOAMI_DB1200:
  25                 return "DB1200";
  26         case BCSR_WHOAMI_DB1300:
  27                 return "DB1300";
  28         case BCSR_WHOAMI_DB1550:
  29                 return "DB1550";
  30         case BCSR_WHOAMI_PB1550_SDR:
  31         case BCSR_WHOAMI_PB1550_DDR:
  32                 return "PB1550";
  33         default:
  34                 return "(unknown)";
  35         }
  36 }
  37
  38 const char *get_system_type(void)
  39 {
  40         return board_type_str();
  41 }
  42
  43 void __init board_setup(void)
  44 {
  45         int ret;
  46
  47         switch (alchemy_get_cputype()) {
  48         case ALCHEMY_CPU_AU1550:
  49                 ret = db1550_board_setup();
  50                 break;
  51         case ALCHEMY_CPU_AU1200:
  52                 ret = db1200_board_setup();
  53                 break;
  54         case ALCHEMY_CPU_AU1300:
  55                 ret = db1300_board_setup();
  56                 break;
  57         default:
  58                 pr_err("unsupported CPU on board\n");
  59                 ret = -ENODEV;
  60         }
  61         if (ret)
  62                 panic("cannot initialize board support\n");
  63 }
  64
  65 int __init db1235_arch_init(void)
  66 {
  67         int id = BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI));
  68         if (id == BCSR_WHOAMI_DB1550)
  69                 return db1550_pci_setup(0);
  70         else if ((id == BCSR_WHOAMI_PB1550_SDR) ||
  71                  (id == BCSR_WHOAMI_PB1550_DDR))
  72                 return db1550_pci_setup(1);
  73
  74         return 0;
  75 }
  76 arch_initcall(db1235_arch_init);
  77
  78 int __init db1235_dev_init(void)
  79 {
  80         switch (BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI))) {
  81         case BCSR_WHOAMI_PB1200_DDR1:
  82         case BCSR_WHOAMI_PB1200_DDR2:
  83         case BCSR_WHOAMI_DB1200:
  84                 return db1200_dev_setup();
  85         case BCSR_WHOAMI_DB1300:
  86                 return db1300_dev_setup();
  87         case BCSR_WHOAMI_DB1550:
  88         case BCSR_WHOAMI_PB1550_SDR:
  89         case BCSR_WHOAMI_PB1550_DDR:
  90                 return db1550_dev_setup();
  91         }
  92         return 0;
  93 }
  94 device_initcall(db1235_dev_init);