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Diffstat (limited to 'arch/mips/au1000/common/puts.c')
| -rw-r--r-- | arch/mips/au1000/common/puts.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/arch/mips/au1000/common/puts.c b/arch/mips/au1000/common/puts.c new file mode 100644 index 00000000000..c2ae4624b77 --- /dev/null +++ b/arch/mips/au1000/common/puts.c @@ -0,0 +1,145 @@ +/* + * + * BRIEF MODULE DESCRIPTION + * Low level uart routines to directly access a 16550 uart. + * + * Copyright 2001 MontaVista Software Inc. + * Author: MontaVista Software, Inc. + * ppopov@mvista.com or source@mvista.com + * + * 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/mach-au1x00/au1000.h> + +#define SERIAL_BASE UART_BASE +#define SER_CMD 0x7 +#define SER_DATA 0x1 +#define TX_BUSY 0x20 + +#define TIMEOUT 0xffffff +#define SLOW_DOWN + +static const char digits[16] = "0123456789abcdef"; +static volatile unsigned long * const com1 = (unsigned long *)SERIAL_BASE; + + +#ifdef SLOW_DOWN +static inline void slow_down(void) +{ + int k; + for (k=0; k<10000; k++); +} +#else +#define slow_down() +#endif + +void +putch(const unsigned char c) +{ + unsigned char ch; + int i = 0; + + do { + ch = com1[SER_CMD]; + slow_down(); + i++; + if (i>TIMEOUT) { + break; + } + } while (0 == (ch & TX_BUSY)); + com1[SER_DATA] = c; +} + +void +puts(unsigned char *cp) +{ + unsigned char ch; + int i = 0; + + while (*cp) { + do { + ch = com1[SER_CMD]; + slow_down(); + i++; + if (i>TIMEOUT) { + break; + } + } while (0 == (ch & TX_BUSY)); + com1[SER_DATA] = *cp++; + } + putch('\r'); + putch('\n'); +} + +void +fputs(const char *cp) +{ + unsigned char ch; + int i = 0; + + while (*cp) { + + do { + ch = com1[SER_CMD]; + slow_down(); + i++; + if (i>TIMEOUT) { + break; + } + } while (0 == (ch & TX_BUSY)); + com1[SER_DATA] = *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); +} |