blob: fbc97af14b1cc845e91775aac976646ed6294e8c [file] [log] [blame]
/* Copyright (c) 2011, The Linux Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of The Linux Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* 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.
*/
#include <debug.h>
#include <reg.h>
#include <platform/iomap.h>
#include <platform/gpio.h>
#include <gsbi.h>
void gpio_tlmm_config(uint32_t gpio, uint8_t func,
uint8_t dir, uint8_t pull,
uint8_t drvstr, uint32_t enable)
{
unsigned int val = 0;
val |= pull;
val |= func << 2;
val |= drvstr << 6;
val |= enable << 9;
unsigned int *addr = (unsigned int *)GPIO_CONFIG_ADDR(gpio);
writel(val, addr);
return;
}
void gpio_set(uint32_t gpio, uint32_t dir)
{
unsigned int *addr = (unsigned int *)GPIO_IN_OUT_ADDR(gpio);
writel(dir, addr);
return;
}
/* Configure gpio for uart - based on gsbi id */
void gpio_config_uart_dm(uint8_t id)
{
switch (id)
{
case GSBI_ID_4:
/* Enable GSBI4 through gpio */
/* configure rx gpio -- gsbi4(2) */
gpio_tlmm_config(14, 1, GPIO_INPUT, GPIO_NO_PULL,
GPIO_8MA, GPIO_DISABLE);
/* configure tx gpio -- gsbi4(3) */
gpio_tlmm_config(15, 1, GPIO_OUTPUT, GPIO_NO_PULL,
GPIO_8MA, GPIO_DISABLE);
break;
default:
ASSERT(0);
}
}