74 lines
2.6 KiB
C
74 lines
2.6 KiB
C
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/* Copyright (c) 2011, 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
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* 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
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <debug.h>
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#include <reg.h>
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#include <platform/iomap.h>
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#include <platform/gpio.h>
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#include <gsbi.h>
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void gpio_tlmm_config(uint32_t gpio, uint8_t func,
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uint8_t dir, uint8_t pull,
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uint8_t drvstr, uint32_t enable)
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{
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unsigned int 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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unsigned int *addr = (unsigned int *)GPIO_CONFIG_ADDR(gpio);
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writel(val, addr);
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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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unsigned int *addr = (unsigned int *)GPIO_IN_OUT_ADDR(gpio);
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writel(dir, addr);
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return;
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}
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/* Configure gpio for uart - based on gsbi id */
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void gpio_config_uart_dm(uint8_t id)
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{
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switch (id)
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{
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case GSBI_ID_4:
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/* Enable GSBI4 through gpio */
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/* configure rx gpio -- gsbi4(2) */
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gpio_tlmm_config(14, 1, GPIO_INPUT, GPIO_NO_PULL,
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GPIO_8MA, GPIO_DISABLE);
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/* configure tx gpio -- gsbi4(3) */
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gpio_tlmm_config(15, 1, GPIO_OUTPUT, GPIO_NO_PULL,
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GPIO_8MA, GPIO_DISABLE);
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break;
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default:
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ASSERT(0);
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}
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}
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