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/**************************************************************************
*
* Copyright (c) 2013 Alcatel-Lucent
*
* Alcatel Lucent licenses this file to You under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. A copy of the License is contained the
* file LICENSE at the top level of this repository.
* You may also obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
**************************************************************************
*
* gpio.h
* DESCRIPTION HERE
* A common way of looking at general purpose IO.
*
* This header is included by all code that uses uMon's general purpose
* GPIO interface mechanism. The idea is as follows:
* Each bit has two values associated with it:
*
* bit:
* The bit number within the register it is assigned (starting from 0).
*
* vbit:
* The bit number within a device which may have multiple registers of GPIO.
* For example, if a device has three 32-bit registers for GPIO, then there
* would be a total of 96 port numbers where 0-31 represent the bits of
* register 0, 32-63 represetnt the bits of register 1 and 64
*
* For each bit, the GPIO(vbit,bit) macro uses fields within a 32-bit value to
* define this information; hence, one 32-bit value contains both the register
* and device specific bit position.
*
* Original author: Ed Sutter (ed.sutter@alcatel-lucent.com)
*
*/
#ifndef _UMONGPIO_H_
#define _UMONGPIO_H_
#define GPIO_BITNUM_MASK 0x000000ff
#define GPIO_VBITNUM_MASK 0xffff0000
#define GPIO(vbit,bit) (((vbit << 16) & GPIO_VBITNUM_MASK) | \
(bit & GPIO_BITNUM_MASK))
#define GPIOVBIT(val) ((val & GPIO_VBITNUM_MASK) >> 16)
#define GPIOBIT(val) (1 << (val & GPIO_BITNUM_MASK))
extern void GPIO_init(void);
/* Each of these functions uses the "virtual" bit number...
*/
extern int GPIO_set(int vbit);
extern int GPIO_clr(int vbit);
extern int GPIO_tst(int vbit);
extern int GPIO_in(int vbit);
extern int GPIO_out(int vbit);
#endif
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