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/irq.h>
  22 #include <asm/delay.h>
  23 #include <asm/mv64x60.h>
  24 #include <asm/machdep.h>
  25
  26
  27 #if defined(CONFIG_SERIAL_TEXT_DEBUG)
  28
  29 #define MPSC_CHR_1      0x000c
  30 #define MPSC_CHR_2      0x0010
  31
  32 static struct mv64x60_handle    mv64x60_dbg_bh;
  33
  34 void
  35 mv64x60_progress_init(u32 base)
  36 {
  37         mv64x60_dbg_bh.v_base = base;
  38         return;
  39 }
  40
  41 static void
  42 mv64x60_polled_putc(int chan, char c)
  43 {
  44         u32     offset;
  45
  46         if (chan == 0)
  47                 offset = 0x8000;
  48         else
  49                 offset = 0x9000;
  50
  51         mv64x60_write(&mv64x60_dbg_bh, offset + MPSC_CHR_1, (u32)c);
  52         mv64x60_write(&mv64x60_dbg_bh, offset + MPSC_CHR_2, 0x200);
  53         udelay(2000);
  54 }
  55
  56 void
  57 mv64x60_mpsc_progress(char *s, unsigned short hex)
  58 {
  59         volatile char   c;
  60
  61         mv64x60_polled_putc(0, '\r');
  62
  63         while ((c = *s++) != 0)
  64                 mv64x60_polled_putc(0, c);
  65
  66         mv64x60_polled_putc(0, '\n');
  67         mv64x60_polled_putc(0, '\r');
  68
  69         return;
  70 }
  71 #endif  /* CONFIG_SERIAL_TEXT_DEBUG */
  72
  73
  74 #if defined(CONFIG_KGDB)
  75
  76 #if defined(CONFIG_KGDB_TTYS0)
  77 #define KGDB_PORT 0
  78 #elif defined(CONFIG_KGDB_TTYS1)
  79 #define KGDB_PORT 1
  80 #else
  81 #error "Invalid kgdb_tty port"
  82 #endif
  83
  84 void
  85 putDebugChar(unsigned char c)
  86 {
  87         mv64x60_polled_putc(KGDB_PORT, (char)c);
  88 }
  89
  90 int
  91 getDebugChar(void)
  92 {
  93         unsigned char   c;
  94
  95         while (!mv64x60_polled_getc(KGDB_PORT, &c));
  96         return (int)c;
  97 }
  98
  99 void
 100 putDebugString(char* str)
 101 {
 102         while (*str != '\0') {
 103                 putDebugChar(*str);
 104                 str++;
 105         }
 106         putDebugChar('\r');
 107         return;
 108 }
 109
 110 void
 111 kgdb_interruptible(int enable)
 112 {
 113 }
 114
 115 void
 116 kgdb_map_scc(void)
 117 {
 118         if (ppc_md.early_serial_map)
 119                 ppc_md.early_serial_map();
 120 }
 121 #endif  /* CONFIG_KGDB */