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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) Guangzhou FriendlyARM Computer Tech. Co., Ltd.
* (http://www.friendlyarm.com)
*/
#include <config.h>
#include <common.h>
#include <i2c.h>
#include <asm/io.h>
#include <asm/arch/nexell.h>
#include <asm/arch/nx_gpio.h>
/* Board revision list: <PCB3 | PCB2 | PCB1>
* 0b000 - NanoPi 2
* 0b001 - NanoPC-T2
* 0b010 - NanoPi S2
* 0b011 - Smart4418
* 0b100 - NanoPi Fire 2A
* 0b111 - NanoPi M2A
*
* Extented revision:
* 0b001 - Smart4418-SDK
*/
#define __IO_GRP 2 /* GPIO_C */
#define __IO_PCB1 26
#define __IO_PCB2 27
#define __IO_PCB3 25
static int pcb_rev = -1;
static int base_rev;
static void bd_hwrev_config_gpio(void)
{
int gpios[3][2] = {
{ __IO_PCB1, 1 },
{ __IO_PCB2, 1 },
{ __IO_PCB3, 1 },
};
int i;
/* gpio input mode, pull-down */
for (i = 0; i < 3; i++) {
nx_gpio_set_pad_function(__IO_GRP, gpios[i][0], gpios[i][1]);
nx_gpio_set_output_enable(__IO_GRP, gpios[i][0], 0);
nx_gpio_set_pull_mode(__IO_GRP, gpios[i][0], 0);
}
}
void bd_hwrev_init(void)
{
if (pcb_rev >= 0)
return;
bd_hwrev_config_gpio();
pcb_rev = nx_gpio_get_input_value(__IO_GRP, __IO_PCB1);
pcb_rev |= nx_gpio_get_input_value(__IO_GRP, __IO_PCB2) << 1;
pcb_rev |= nx_gpio_get_input_value(__IO_GRP, __IO_PCB3) << 2;
}
/* Get extended revision for SmartXX18 */
void bd_base_rev_init(void)
{
struct udevice *dev;
u8 val = 0;
if (pcb_rev != 0x3)
return;
#define PCA9536_I2C_BUS 2
#define PCA9636_I2C_ADDR 0x41
if (i2c_get_chip_for_busnum
(PCA9536_I2C_BUS, PCA9636_I2C_ADDR, 1, &dev))
return;
if (!dm_i2c_read(dev, 0, &val, 1))
base_rev = (val & 0xf);
}
/* To override __weak symbols */
u32 get_board_rev(void)
{
return (base_rev << 8) | pcb_rev;
}
const char *get_board_name(void)
{
bd_hwrev_init();
switch (pcb_rev) {
case 0:
return "NanoPi 2";
case 1:
return "NanoPC-T2";
case 2:
return "NanoPi S2";
case 3:
return "Smart4418";
case 4:
return "NanoPi Fire 2A";
case 7:
return "NanoPi M2A";
default:
return "s5p4418-X";
}
}
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