/*
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* * Copyright 2000-2009
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* * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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* *
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* * SPDX-License-Identifier: GPL-2.0+
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* */
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#include <common.h>
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#include <asm/io.h>
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#include <physical_key.h>
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#include <sys_config.h>
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#include <fdt_support.h>
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#include <console.h>
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__attribute__((section(".data")))
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static int keyen_flag = 1;
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__weak int axp_probe_key(void)
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{
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return 0;
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}
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int sunxi_key_init(void)
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{
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uint reg_val = 0;
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sunxi_key_clock_open();
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/*choose channel 0*/
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reg_val = readl(GP_CS_EN);
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reg_val |= 1;
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writel(reg_val, GP_CS_EN);
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/*choose continue work mode and enable ADC*/
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reg_val = readl(GP_CTRL);
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reg_val &= ~(1<<18);
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reg_val |= ((1<<19) | (1<<16));
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writel(reg_val, GP_CTRL);
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/* disable all key irq */
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writel(0, GP_DATA_INTC);
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writel(1, GP_DATA_INTS);
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script_parser_fetch("key_detect_en", "keyen_flag", &keyen_flag, 1);
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return 0;
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}
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int sunxi_key_exit(void)
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{
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writel(0, GP_CTRL);
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/* disable all key irq */
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writel(0, GP_DATA_INTC);
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writel(0, GP_DATA_INTS);
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sunxi_key_clock_close();
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return 0;
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}
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int sunxi_key_read(void)
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{
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u32 ints;
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int key = -1;
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int vin;
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if (!keyen_flag)
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return -1;
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ints = readl(GP_DATA_INTS);
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/* clear the pending data */
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writel(readl(GP_DATA_INTS)|(ints & 0x1), GP_DATA_INTS);
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/* if there is already data pending, read it */
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if (ints & GPADC0_DATA_PENDING) {
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vin = readl(GP_CH0_DATA)*18/4095;
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if (vin > 16)
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key = -1;
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else {
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key = readl(GP_CH0_DATA)*63/4095;
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printf("key pressed value=0x%x\n", key);
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}
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}
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return key;
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}
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int do_key_test(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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u32 power_key = 0;
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writel(1, GP_DATA_INTS);
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printf(" press a key:\n");
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while (!ctrlc()) {
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sunxi_key_read();
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power_key = axp_probe_key();
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if (power_key > 0) {
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break;
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}
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}
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return 0;
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}
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U_BOOT_CMD(
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key_test, 1, 0, do_key_test,
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"Test the key value\n",
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""
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);
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