board/Marvell/common/serial.c

   1 /*
   2  * (C) Copyright 2001
   3  * Josh Huber <huber@mclx.com>, Mission Critical Linux, Inc.
   4  *
   5  * modified for marvell db64360 eval board by
   6  * Ingo Assmus <ingo.assmus@keymile.com>
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 /*
  12  * serial.c - serial support for the gal ev board
  13  */
  14
  15 /* supports both the 16650 duart and the MPSC */
  16
  17 #include <common.h>
  18 #include <command.h>
  19 #include <serial.h>
  20 #include <linux/compiler.h>
  21
  22 #include "../include/memory.h"
  23 #include "serial.h"
  24
  25 #ifdef CONFIG_DB64360
  26 #include "../db64360/mpsc.h"
  27 #endif
  28
  29 #ifdef CONFIG_DB64460
  30 #include "../db64460/mpsc.h"
  31 #endif
  32
  33 #include "ns16550.h"
  34
  35 DECLARE_GLOBAL_DATA_PTR;
  36
  37 #ifdef CONFIG_MPSC
  38 static int marvell_serial_init(void)
  39 {
  40 #if (defined CONFIG_SYS_INIT_CHAN1) || (defined CONFIG_SYS_INIT_CHAN2)
  41         int clock_divisor = 230400 / gd->baudrate;
  42 #endif
  43
  44         mpsc_init (gd->baudrate);
  45
  46         /* init the DUART chans so that KGDB in the kernel can use them */
  47 #ifdef CONFIG_SYS_INIT_CHAN1
  48         NS16550_reinit (COM_PORTS[0], clock_divisor);
  49 #endif
  50 #ifdef CONFIG_SYS_INIT_CHAN2
  51         NS16550_reinit (COM_PORTS[1], clock_divisor);
  52 #endif
  53         return (0);
  54 }
  55
  56 static void marvell_serial_putc(const char c)
  57 {
  58         if (c == '\n')
  59                 mpsc_putchar ('\r');
  60
  61         mpsc_putchar (c);
  62 }
  63
  64 static int marvell_serial_getc(void)
  65 {
  66         return mpsc_getchar ();
  67 }
  68
  69 static int marvell_serial_tstc(void)
  70 {
  71         return mpsc_test_char ();
  72 }
  73
  74 static void marvell_serial_setbrg(void)
  75 {
  76         galbrg_set_baudrate (CONFIG_MPSC_PORT, gd->baudrate);
  77 }
  78
  79 #else  /* ! CONFIG_MPSC */
  80
  81 static int marvell_serial_init(void)
  82 {
  83         int clock_divisor = 230400 / gd->baudrate;
  84
  85 #ifdef CONFIG_SYS_INIT_CHAN1
  86         (void) NS16550_init (0, clock_divisor);
  87 #endif
  88 #ifdef CONFIG_SYS_INIT_CHAN2
  89         (void) NS16550_init (1, clock_divisor);
  90 #endif
  91         return (0);
  92 }
  93
  94 static void marvell_serial_putc(const char c)
  95 {
  96         if (c == '\n')
  97                 NS16550_putc (COM_PORTS[CONFIG_SYS_DUART_CHAN], '\r');
  98
  99         NS16550_putc (COM_PORTS[CONFIG_SYS_DUART_CHAN], c);
 100 }
 101
 102 static int marvell_serial_getc(void)
 103 {
 104         return NS16550_getc (COM_PORTS[CONFIG_SYS_DUART_CHAN]);
 105 }
 106
 107 static int marvell_serial_tstc(void)
 108 {
 109         return NS16550_tstc (COM_PORTS[CONFIG_SYS_DUART_CHAN]);
 110 }
 111
 112 static void marvell_serial_setbrg(void)
 113 {
 114         int clock_divisor = 230400 / gd->baudrate;
 115
 116 #ifdef CONFIG_SYS_INIT_CHAN1
 117         NS16550_reinit (COM_PORTS[0], clock_divisor);
 118 #endif
 119 #ifdef CONFIG_SYS_INIT_CHAN2
 120         NS16550_reinit (COM_PORTS[1], clock_divisor);
 121 #endif
 122 }
 123
 124 #endif /* CONFIG_MPSC */
 125
 126 static struct serial_device marvell_serial_drv = {
 127         .name   = "marvell_serial",
 128         .start  = marvell_serial_init,
 129         .stop   = NULL,
 130         .setbrg = marvell_serial_setbrg,
 131         .putc   = marvell_serial_putc,
 132         .puts   = default_serial_puts,
 133         .getc   = marvell_serial_getc,
 134         .tstc   = marvell_serial_tstc,
 135 };
 136
 137 void marvell_serial_initialize(void)
 138 {
 139         serial_register(&marvell_serial_drv);
 140 }
 141
 142 __weak struct serial_device *default_serial_console(void)
 143 {
 144         return &marvell_serial_drv;
 145 }
 146
 147 #if defined(CONFIG_CMD_KGDB)
 148 void kgdb_serial_init (void)
 149 {
 150 }
 151
 152 void putDebugChar (int c)
 153 {
 154         serial_putc (c);
 155 }
 156
 157 void putDebugStr (const char *str)
 158 {
 159         serial_puts (str);
 160 }
 161
 162 int getDebugChar (void)
 163 {
 164         return serial_getc ();
 165 }
 166
 167 void kgdb_interruptible (int yes)
 168 {
 169         return;
 170 }
 171 #endif