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/*
* Copyright (C) 2017 C-SKY Microsystems Co., Ltd. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may 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.
*/
/******************************************************************************
* @file pinmux.c
* @brief source file for the pinmux
* @version V1.0
* @date 02. June 2017
******************************************************************************/
#include <stdint.h>
#include "pinmux.h"
#include "pin_name.h"
#define readl(addr) \
({ unsigned int __v = (*(volatile unsigned int *) (addr)); __v; })
#define writel(b,addr) (void)((*(volatile unsigned int *) (addr)) = (b))
/*******************************************************************************
* function: hobbit_ioreuse_inital
*
* description:
* initial hobbit_pinmux
*******************************************************************************/
extern int32_t target_qspi_init(pin_name_t mosi, pin_name_t miso, pin_name_t sclk, pin_name_t ssel, pin_name_t wp, pin_name_t hold, uint32_t *base, uint32_t *irq);
void hobbit_ioreuse_initial(void)
{
unsigned int value;
/* gpio data source select */
value = readl(HOBBIT_GIPO0_PORTCTL_REG);
value |= GPIO0_REUSE_EN;
writel(value, HOBBIT_GIPO0_PORTCTL_REG);
value = readl(HOBBIT_GIPO1_PORTCTL_REG);
value |= GPIO1_REUSE_EN;
writel(value, HOBBIT_GIPO1_PORTCTL_REG);
/* reuse function select */
value = readl(HOBBIT_IOMUX0L_REG);
value |= IOMUX0L_FUNCTION_SEL;
writel(value, HOBBIT_IOMUX0H_REG);
value = readl(HOBBIT_IOMUX0H_REG);
value |= IOMUX1L_FUNCTION_SEL;
writel(value, HOBBIT_IOMUX0H_REG);
value = readl(HOBBIT_IOMUX1L_REG);
value |= IOMUX1L_FUNCTION_SEL;
writel(value, HOBBIT_IOMUX1L_REG);
target_qspi_init(PA4_QSPI0MOSI_XX_XX_XX, PA3_QSPI0MISO_XX_XX_XX, PA2_QSPI0CLK_XX_XX_XX, PA7_QSPI0CS0_XX_XX_XX, PA6_QSPI0WP_XX_XX_XX, PA5_QSPI0HOLD_XX_XX_XX, 0, 0);
}
int32_t pin_mux(pin_name_t pin, uint16_t function)
{
unsigned int val = 0;
unsigned int reg_val = 0;
uint8_t offset;
if (function > 3) {
if (pin < PB0_UART2TX_XX_XX_SIROUT2) {
offset = pin;
/* gpio data source select */
val = readl(HOBBIT_GIPO0_PORTCTL_REG);
val &= ~(1 << offset);
writel(val, HOBBIT_GIPO0_PORTCTL_REG);
return 0;
} else if (pin >= PB0_UART2TX_XX_XX_SIROUT2) {
offset = pin - 32;
/* gpio data source select */
val = readl(HOBBIT_GIPO1_PORTCTL_REG);
val &= ~(1 << offset);
writel(val, HOBBIT_GIPO1_PORTCTL_REG);
return 0;
} else {
return -1;
}
}
if (pin >= PB0_UART2TX_XX_XX_SIROUT2) {
offset = pin - 32;
/* gpio data source select */
val = readl(HOBBIT_GIPO1_PORTCTL_REG);
val |= (1 << offset);
writel(val, HOBBIT_GIPO1_PORTCTL_REG);
reg_val = (0x3 << (offset * 2));
/* reuse function select */
val = readl(HOBBIT_IOMUX1L_REG);
val &= ~(reg_val);
val |= (function << (2 * offset));
writel(val, HOBBIT_IOMUX1L_REG);
return 0;
}
offset = pin;
/* gpio data source select */
val = readl(HOBBIT_GIPO0_PORTCTL_REG);
val |= (1 << offset);
writel(val, HOBBIT_GIPO0_PORTCTL_REG);
if (pin >= PA16_SPI0CS0_PWMTRIG0_XX_USI1SCLK) {
offset = pin - 16;
reg_val = (0x3 << (offset * 2));
/* reuse function select */
val = readl(HOBBIT_IOMUX0H_REG);
val &= ~(reg_val);
val |= (function << (2 * offset));
writel(val, HOBBIT_IOMUX0H_REG);
return 0;
}
reg_val = (0x3 << (offset * 2));
/* reuse function select */
val = readl(HOBBIT_IOMUX0L_REG);
val &= ~(reg_val);
val |= (function << (2 * offset));
writel(val, HOBBIT_IOMUX0L_REG);
return 0;
}
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