/* * * BRIEF MODULE DESCRIPTION * Low level uart routines to directly access a TX[34]927 SIO. * * Copyright 2001 MontaVista Software Inc. * Author: MontaVista Software, Inc. * ahennessy@mvista.com or source@mvista.com * * Copyright (C) 2000-2001 Toshiba Corporation * * Based on arch/mips/au1000/common/puts.c * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/types.h> #include <asm/jmr3927/txx927.h> #include <asm/jmr3927/tx3927.h> #include <asm/jmr3927/jmr3927.h> #define TIMEOUT 0xffffff #define SLOW_DOWN static const char digits[16] = "0123456789abcdef"; #ifdef SLOW_DOWN #define slow_down() { int k; for (k=0; k<10000; k++); } #else #define slow_down() #endif void putch(const unsigned char c) { int i = 0; do { slow_down(); i++; if (i>TIMEOUT) { break; } } while (!(tx3927_sioptr(1)->cisr & TXx927_SICISR_TXALS)); tx3927_sioptr(1)->tfifo = c; return; } unsigned char getch(void) { int i = 0; int dicr; char c; /* diable RX int. */ dicr = tx3927_sioptr(1)->dicr; tx3927_sioptr(1)->dicr = 0; do { slow_down(); i++; if (i>TIMEOUT) { break; } } while (tx3927_sioptr(1)->disr & TXx927_SIDISR_UVALID) ; c = tx3927_sioptr(1)->rfifo; /* clear RX int. status */ tx3927_sioptr(1)->disr &= ~TXx927_SIDISR_RDIS; /* enable RX int. */ tx3927_sioptr(1)->dicr = dicr; return c; } void do_jmr3927_led_set(char n) { /* and with current leds */ jmr3927_led_and_set(n); } void puts(unsigned char *cp) { int i = 0; while (*cp) { do { slow_down(); i++; if (i>TIMEOUT) { break; } } while (!(tx3927_sioptr(1)->cisr & TXx927_SICISR_TXALS)); tx3927_sioptr(1)->tfifo = *cp++; } putch('\r'); putch('\n'); } void fputs(unsigned char *cp) { int i = 0; while (*cp) { do { slow_down(); i++; if (i>TIMEOUT) { break; } } while (!(tx3927_sioptr(1)->cisr & TXx927_SICISR_TXALS)); tx3927_sioptr(1)->tfifo = *cp++; } } void put64(uint64_t ul) { int cnt; unsigned ch; cnt = 16; /* 16 nibbles in a 64 bit long */ putch('0'); putch('x'); do { cnt--; ch = (unsigned char)(ul >> cnt * 4) & 0x0F; putch(digits[ch]); } while (cnt > 0); } void put32(unsigned u) { int cnt; unsigned ch; cnt = 8; /* 8 nibbles in a 32 bit long */ putch('0'); putch('x'); do { cnt--; ch = (unsigned char)(u >> cnt * 4) & 0x0F; putch(digits[ch]); } while (cnt > 0); }