82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
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/*
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* Copyright (c) 2012, The Linux Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Linux Foundation nor
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* the names of its contributors may be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <reg.h>
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#include <debug.h>
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#include <platform/iomap.h>
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#include <platform/gpio.h>
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void gpio_tlmm_config(uint32_t gpio,
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uint8_t func,
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uint8_t dir,
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uint8_t pull,
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uint8_t drvstr,
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uint32_t enable)
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{
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uint32_t val = 0;
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val |= pull;
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val |= func << 2;
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val |= drvstr << 6;
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val |= enable << 9;
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writel(val, GPIO_CONFIG_ADDR(gpio));
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return;
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}
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void gpio_set(uint32_t gpio, uint32_t dir)
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{
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writel(dir, GPIO_IN_OUT_ADDR(gpio));
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return;
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}
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uint32_t gpio_get_state(uint32_t gpio)
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{
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return readl(GPIO_IN_OUT_ADDR(gpio));
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}
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void gpio_config_uart_dm(uint8_t id)
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{
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if (id == 3)
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{
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/* configure rx gpio. */
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gpio_tlmm_config(9, 1, GPIO_INPUT, GPIO_NO_PULL, GPIO_8MA, GPIO_DISABLE);
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/* configure tx gpio. */
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gpio_tlmm_config(8, 1, GPIO_OUTPUT, GPIO_NO_PULL, GPIO_8MA, GPIO_DISABLE);
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}
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else
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{
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dprintf(CRITICAL, "GPIO config for UART id = %d not supported.\n", id);
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ASSERT(0);
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}
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}
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