arch/ppc/syslib/mv64x60_dbg.c

   1 /*
   2  * KGDB and progress routines for the Marvell/Galileo MV64x60 (Discovery).
   3  *
   4  * Author: Mark A. Greer <mgreer@mvista.com>
   5  *
   6  * 2003 (c) MontaVista Software, Inc.  This file is licensed under
   7  * the terms of the GNU General Public License version 2.  This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  */
  11
  12 /*
  13  *****************************************************************************
  14  *
  15  *      Low-level MPSC/UART I/O routines
  16  *
  17  *****************************************************************************
  18  */
  19
  20
  21 #include <linux/config.h>
  22 #include <linux/irq.h>
  23 #include <asm/delay.h>
  24 #include <asm/mv64x60.h>
  25 #include <asm/machdep.h>
  26
  27
  28 #if defined(CONFIG_SERIAL_TEXT_DEBUG)
  29
  30 #define MPSC_CHR_1      0x000c
  31 #define MPSC_CHR_2      0x0010
  32
  33 static struct mv64x60_handle    mv64x60_dbg_bh;
  34
  35 void
  36 mv64x60_progress_init(u32 base)
  37 {
  38         mv64x60_dbg_bh.v_base = base;
  39         return;
  40 }
  41
  42 static void
  43 mv64x60_polled_putc(int chan, char c)
  44 {
  45         u32     offset;
  46
  47         if (chan == 0)
  48                 offset = 0x8000;
  49         else
  50                 offset = 0x9000;
  51
  52         mv64x60_write(&mv64x60_dbg_bh, offset + MPSC_CHR_1, (u32)c);
  53         mv64x60_write(&mv64x60_dbg_bh, offset + MPSC_CHR_2, 0x200);
  54         udelay(2000);
  55 }
  56
  57 void
  58 mv64x60_mpsc_progress(char *s, unsigned short hex)
  59 {
  60         volatile char   c;
  61
  62         mv64x60_polled_putc(0, '\r');
  63
  64         while ((c = *s++) != 0)
  65                 mv64x60_polled_putc(0, c);
  66
  67         mv64x60_polled_putc(0, '\n');
  68         mv64x60_polled_putc(0, '\r');
  69
  70         return;
  71 }
  72 #endif  /* CONFIG_SERIAL_TEXT_DEBUG */
  73
  74
  75 #if defined(CONFIG_KGDB)
  76
  77 #if defined(CONFIG_KGDB_TTYS0)
  78 #define KGDB_PORT 0
  79 #elif defined(CONFIG_KGDB_TTYS1)
  80 #define KGDB_PORT 1
  81 #else
  82 #error "Invalid kgdb_tty port"
  83 #endif
  84
  85 void
  86 putDebugChar(unsigned char c)
  87 {
  88         mv64x60_polled_putc(KGDB_PORT, (char)c);
  89 }
  90
  91 int
  92 getDebugChar(void)
  93 {
  94         unsigned char   c;
  95
  96         while (!mv64x60_polled_getc(KGDB_PORT, &c));
  97         return (int)c;
  98 }
  99
 100 void
 101 putDebugString(char* str)
 102 {
 103         while (*str != '\0') {
 104                 putDebugChar(*str);
 105                 str++;
 106         }
 107         putDebugChar('\r');
 108         return;
 109 }
 110
 111 void
 112 kgdb_interruptible(int enable)
 113 {
 114 }
 115
 116 void
 117 kgdb_map_scc(void)
 118 {
 119         if (ppc_md.early_serial_map)
 120                 ppc_md.early_serial_map();
 121 }
 122 #endif  /* CONFIG_KGDB */