arch/ppc/syslib/mv64x60_dbg.c

   1 /*
   2  * arch/ppc/syslib/mv64x60_dbg.c
   3  *
   4  * KGDB and progress routines for the Marvell/Galileo MV64x60 (Discovery).
   5  *
   6  * Author: Mark A. Greer <mgreer@mvista.com>
   7  *
   8  * 2003 (c) MontaVista Software, Inc.  This file is licensed under
   9  * the terms of the GNU General Public License version 2.  This program
  10  * is licensed "as is" without any warranty of any kind, whether express
  11  * or implied.
  12  */
  13
  14 /*
  15  *****************************************************************************
  16  *
  17  *      Low-level MPSC/UART I/O routines
  18  *
  19  *****************************************************************************
  20  */
  21
  22
  23 #include <linux/config.h>
  24 #include <linux/irq.h>
  25 #include <asm/delay.h>
  26 #include <asm/mv64x60.h>
  27
  28
  29 #if defined(CONFIG_SERIAL_TEXT_DEBUG)
  30
  31 #define MPSC_CHR_1      0x000c
  32 #define MPSC_CHR_2      0x0010
  33
  34 static struct mv64x60_handle    mv64x60_dbg_bh;
  35
  36 void
  37 mv64x60_progress_init(u32 base)
  38 {
  39         mv64x60_dbg_bh.v_base = base;
  40         return;
  41 }
  42
  43 static void
  44 mv64x60_polled_putc(int chan, char c)
  45 {
  46         u32     offset;
  47
  48         if (chan == 0)
  49                 offset = 0x8000;
  50         else
  51                 offset = 0x9000;
  52
  53         mv64x60_write(&mv64x60_dbg_bh, offset + MPSC_CHR_1, (u32)c);
  54         mv64x60_write(&mv64x60_dbg_bh, offset + MPSC_CHR_2, 0x200);
  55         udelay(2000);
  56 }
  57
  58 void
  59 mv64x60_mpsc_progress(char *s, unsigned short hex)
  60 {
  61         volatile char   c;
  62
  63         mv64x60_polled_putc(0, '\r');
  64
  65         while ((c = *s++) != 0)
  66                 mv64x60_polled_putc(0, c);
  67
  68         mv64x60_polled_putc(0, '\n');
  69         mv64x60_polled_putc(0, '\r');
  70
  71         return;
  72 }
  73 #endif  /* CONFIG_SERIAL_TEXT_DEBUG */
  74
  75
  76 #if defined(CONFIG_KGDB)
  77
  78 #if defined(CONFIG_KGDB_TTYS0)
  79 #define KGDB_PORT 0
  80 #elif defined(CONFIG_KGDB_TTYS1)
  81 #define KGDB_PORT 1
  82 #else
  83 #error "Invalid kgdb_tty port"
  84 #endif
  85
  86 void
  87 putDebugChar(unsigned char c)
  88 {
  89         mv64x60_polled_putc(KGDB_PORT, (char)c);
  90 }
  91
  92 int
  93 getDebugChar(void)
  94 {
  95         unsigned char   c;
  96
  97         while (!mv64x60_polled_getc(KGDB_PORT, &c));
  98         return (int)c;
  99 }
 100
 101 void
 102 putDebugString(char* str)
 103 {
 104         while (*str != '\0') {
 105                 putDebugChar(*str);
 106                 str++;
 107         }
 108         putDebugChar('\r');
 109         return;
 110 }
 111
 112 void
 113 kgdb_interruptible(int enable)
 114 {
 115 }
 116
 117 void
 118 kgdb_map_scc(void)
 119 {
 120         if (ppc_md.early_serial_map)
 121                 ppc_md.early_serial_map();
 122 }
 123 #endif  /* CONFIG_KGDB */