arch/mips/jmr3927/common/puts.c

   1 /*
   2  *
   3  * BRIEF MODULE DESCRIPTION
   4  *      Low level uart routines to directly access a TX[34]927 SIO.
   5  *
   6  * Copyright 2001 MontaVista Software Inc.
   7  * Author: MontaVista Software, Inc.
   8  *              ahennessy@mvista.com or source@mvista.com
   9  *
  10  * Copyright (C) 2000-2001 Toshiba Corporation
  11  *
  12  * Based on arch/mips/au1000/common/puts.c
  13  *
  14  *  This program is free software; you can redistribute  it and/or modify it
  15  *  under  the terms of  the GNU General  Public License as published by the
  16  *  Free Software Foundation;  either version 2 of the  License, or (at your
  17  *  option) any later version.
  18  *
  19  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  20  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  21  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  22  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  23  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  25  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  26  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  27  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  *  You should have received a copy of the  GNU General Public License along
  31  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  32  *  675 Mass Ave, Cambridge, MA 02139, USA.
  33  */
  34
  35 #include <linux/types.h>
  36 #include <asm/jmr3927/txx927.h>
  37 #include <asm/jmr3927/tx3927.h>
  38 #include <asm/jmr3927/jmr3927.h>
  39
  40 #define TIMEOUT       0xffffff
  41 #define SLOW_DOWN
  42
  43 static const char digits[16] = "0123456789abcdef";
  44
  45 #ifdef SLOW_DOWN
  46 #define slow_down() { int k; for (k=0; k<10000; k++); }
  47 #else
  48 #define slow_down()
  49 #endif
  50
  51 void
  52 putch(const unsigned char c)
  53 {
  54         int i = 0;
  55
  56         do {
  57             slow_down();
  58             i++;
  59             if (i>TIMEOUT) {
  60                 break;
  61             }
  62         } while (!(tx3927_sioptr(1)->cisr & TXx927_SICISR_TXALS));
  63         tx3927_sioptr(1)->tfifo = c;
  64         return;
  65 }
  66
  67 unsigned char getch(void)
  68 {
  69         int i = 0;
  70         int dicr;
  71         char c;
  72
  73         /* diable RX int. */
  74         dicr = tx3927_sioptr(1)->dicr;
  75         tx3927_sioptr(1)->dicr = 0;
  76
  77         do {
  78             slow_down();
  79             i++;
  80             if (i>TIMEOUT) {
  81                 break;
  82             }
  83         } while (tx3927_sioptr(1)->disr & TXx927_SIDISR_UVALID)
  84                 ;
  85         c = tx3927_sioptr(1)->rfifo;
  86
  87         /* clear RX int. status */
  88         tx3927_sioptr(1)->disr &= ~TXx927_SIDISR_RDIS;
  89         /* enable RX int. */
  90         tx3927_sioptr(1)->dicr = dicr;
  91
  92         return c;
  93 }
  94 void
  95 do_jmr3927_led_set(char n)
  96 {
  97     /* and with current leds */
  98     jmr3927_led_and_set(n);
  99 }
 100
 101 void
 102 puts(unsigned char *cp)
 103 {
 104     int i = 0;
 105
 106     while (*cp) {
 107         do {
 108             slow_down();
 109             i++;
 110             if (i>TIMEOUT) {
 111                 break;
 112             }
 113         } while (!(tx3927_sioptr(1)->cisr & TXx927_SICISR_TXALS));
 114         tx3927_sioptr(1)->tfifo = *cp++;
 115     }
 116     putch('\r');
 117     putch('\n');
 118 }
 119
 120 void
 121 fputs(unsigned char *cp)
 122 {
 123     int i = 0;
 124
 125     while (*cp) {
 126         do {
 127              slow_down();
 128             i++;
 129             if (i>TIMEOUT) {
 130                 break;
 131             }
 132         } while (!(tx3927_sioptr(1)->cisr & TXx927_SICISR_TXALS));
 133         tx3927_sioptr(1)->tfifo = *cp++;
 134     }
 135 }
 136
 137
 138 void
 139 put64(uint64_t ul)
 140 {
 141     int cnt;
 142     unsigned ch;
 143
 144     cnt = 16;            /* 16 nibbles in a 64 bit long */
 145     putch('0');
 146     putch('x');
 147     do {
 148         cnt--;
 149         ch = (unsigned char)(ul >> cnt * 4) & 0x0F;
 150                 putch(digits[ch]);
 151     } while (cnt > 0);
 152 }
 153
 154 void
 155 put32(unsigned u)
 156 {
 157     int cnt;
 158     unsigned ch;
 159
 160     cnt = 8;            /* 8 nibbles in a 32 bit long */
 161     putch('0');
 162     putch('x');
 163     do {
 164         cnt--;
 165         ch = (unsigned char)(u >> cnt * 4) & 0x0F;
 166                 putch(digits[ch]);
 167     } while (cnt > 0);
 168 }