release/src-rt-6.x.4708/linux/linux-2.6.36/arch/m32r/boot/compressed/m32r_sio.c

   1 /*
   2  * arch/m32r/boot/compressed/m32r_sio.c
   3  *
   4  * 2003-02-12:  Takeo Takahashi
   5  * 2006-11-30:  OPSPUT support by Kazuhiro Inaoka
   6  *
   7  */
   8
   9 #include <asm/processor.h>
  10
  11 static void putc(char c);
  12
  13 static int puts(const char *s)
  14 {
  15         char c;
  16         while ((c = *s++)) putc(c);
  17         return 0;
  18 }
  19
  20 #if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_OPSPUT)
  21 #include <asm/m32r.h>
  22 #include <asm/io.h>
  23
  24 #define USE_FPGA_MAP    0
  25
  26 #if USE_FPGA_MAP
  27 /*
  28  * fpga configuration program uses MMU, and define map as same as
  29  * M32104 uT-Engine board.
  30  */
  31 #define BOOT_SIO0STS    (volatile unsigned short *)(0x02c00000 + 0x20006)
  32 #define BOOT_SIO0TXB    (volatile unsigned short *)(0x02c00000 + 0x2000c)
  33 #else
  34 #undef PLD_BASE
  35 #if defined(CONFIG_PLAT_OPSPUT)
  36 #define PLD_BASE        0x1cc00000
  37 #else
  38 #define PLD_BASE        0xa4c00000
  39 #endif
  40 #define BOOT_SIO0STS    PLD_ESIO0STS
  41 #define BOOT_SIO0TXB    PLD_ESIO0TXB
  42 #endif
  43
  44 static void putc(char c)
  45 {
  46         while ((*BOOT_SIO0STS & 0x3) != 0x3)
  47                 cpu_relax();
  48         if (c == '\n') {
  49                 *BOOT_SIO0TXB = '\r';
  50                 while ((*BOOT_SIO0STS & 0x3) != 0x3)
  51                         cpu_relax();
  52         }
  53         *BOOT_SIO0TXB = c;
  54 }
  55 #else /* !(CONFIG_PLAT_M32700UT) */
  56 #if defined(CONFIG_PLAT_MAPPI2)
  57 #define SIO0STS (volatile unsigned short *)(0xa0efd000 + 14)
  58 #define SIO0TXB (volatile unsigned short *)(0xa0efd000 + 30)
  59 #else
  60 #define SIO0STS (volatile unsigned short *)(0x00efd000 + 14)
  61 #define SIO0TXB (volatile unsigned short *)(0x00efd000 + 30)
  62 #endif
  63
  64 static void putc(char c)
  65 {
  66         while ((*SIO0STS & 0x1) == 0)
  67                 cpu_relax();
  68         if (c == '\n') {
  69                 *SIO0TXB = '\r';
  70                 while ((*SIO0STS & 0x1) == 0)
  71                         cpu_relax();
  72         }
  73         *SIO0TXB = c;
  74 }
  75 #endif