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author | Ralf Baechle <ralf@linux-mips.org> | 2008-09-16 17:12:16 (GMT) |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2008-10-11 15:18:50 (GMT) |
commit | e8c7c482347574ecdd45c43e32c332d5fc2ece61 (patch) | |
tree | c741aa6cdb4e897df9f9476d83a816a7a2b058dd /arch/mips/alchemy/common/puts.c | |
parent | 8d2d91e86b4153cc2305ec86fe908048f459ff7f (diff) | |
download | linux-fsl-qoriq-e8c7c482347574ecdd45c43e32c332d5fc2ece61.tar.xz |
MIPS: Alchemy: rename directory
It's more than the au1000 these days.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/alchemy/common/puts.c')
-rw-r--r-- | arch/mips/alchemy/common/puts.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/arch/mips/alchemy/common/puts.c b/arch/mips/alchemy/common/puts.c new file mode 100644 index 0000000..55bbe24 --- /dev/null +++ b/arch/mips/alchemy/common/puts.c @@ -0,0 +1,68 @@ +/* + * + * BRIEF MODULE DESCRIPTION + * Low level UART routines to directly access Alchemy UART. + * + * Copyright 2001, 2008 MontaVista Software Inc. + * Author: MontaVista Software, Inc. <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 <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 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 +prom_putchar(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; +} |