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/**************************************************************************//**
*
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-11-11 Wayne First version
*
******************************************************************************/
#include <rtthread.h>
#include "NuMicro.h"
#define ERROR rt_kprintf
#define RETRY_COUNT 3
/*---------------------------------------------------------------------------------------------------------*/
/* Global variables */
/*---------------------------------------------------------------------------------------------------------*/
static uint8_t g_u8DeviceAddr = 0xB0;
static uint8_t g_uPageNum;
static uint8_t g_u8RegAddr;
static uint8_t g_u8WriteData;
static volatile uint8_t g_u8RxData;
static volatile uint8_t g_u8DataLen;
static volatile uint8_t g_u8EndFlag = 0;
static void I2C0_MasterRx(uint32_t u32Status)
{
if (u32Status == 0x08)
{
/* START has been transmitted and prepare SLA+W */
I2C0->DAT = g_u8DeviceAddr | (g_uPageNum << 1);
I2C0->CTL0 = (I2C0->CTL0 & ~0x3c) | I2C_CTL_SI;
}
else if (u32Status == 0x18)
{
/* SLA+W has been transmitted and ACK has been received */
I2C0->DAT = g_u8RegAddr;
I2C0->CTL0 = (I2C0->CTL0 & ~0x3c) | I2C_CTL_SI;
}
else if (u32Status == 0x20)
{
/* SLA+W has been transmitted and NACK has been received */
I2C0->CTL0 = (I2C0->CTL0 & ~0x3c) | (I2C_CTL_STA | I2C_CTL_STO | I2C_CTL_SI);
}
else if (u32Status == 0x28)
{
/* DATA has been transmitted and ACK has been received */
I2C0->CTL0 = (I2C0->CTL0 & ~0x3c) | (I2C_CTL_STA | I2C_CTL_SI); // repeat start
}
else if (u32Status == 0x10)
{
/* Repeat START has been transmitted and prepare SLA+R */
I2C0->DAT = (g_u8DeviceAddr | (g_uPageNum << 1)) | 0x01;
I2C0->CTL0 = (I2C0->CTL0 & ~0x3c) | I2C_CTL_SI;
}
else if (u32Status == 0x40)
{
/* SLA+R has been transmitted and ACK has been received */
I2C0->CTL0 = (I2C0->CTL0 & ~0x3c) | I2C_CTL_SI;
}
else if (u32Status == 0x58)
{
/* DATA has been received and NACK has been returned */
g_u8RxData = I2C0->DAT;
I2C0->CTL0 = (I2C0->CTL0 & ~0x3c) | (I2C_CTL_STO | I2C_CTL_SI);
g_u8EndFlag = 1;
}
else
{
ERROR("Status 0x%x is NOT processed\n", u32Status);
}
}
static void I2C0_MasterTx(uint32_t u32Status)
{
if (u32Status == 0x08)
{
/* START has been transmitted */
I2C0->DAT = g_u8DeviceAddr | (g_uPageNum << 1); /* Write SLA+W to Register I2CDAT */
I2C0->CTL0 = (I2C0->CTL0 & ~0x3c) | I2C_CTL_SI;
}
else if (u32Status == 0x18)
{
/* SLA+W has been transmitted and ACK has been received */
I2C0->DAT = g_u8RegAddr;
I2C0->CTL0 = (I2C0->CTL0 & ~0x3c) | I2C_CTL_SI;
}
else if (u32Status == 0x20)
{
/* SLA+W has been transmitted and NACK has been received */
I2C0->CTL0 = (I2C0->CTL0 & ~0x3c) | (I2C_CTL_STA | I2C_CTL_STO | I2C_CTL_SI);
}
else if (u32Status == 0x28)
{
/* DATA has been transmitted and ACK has been received */
if ((g_u8DataLen == 0) && (g_u8EndFlag == 0))
{
I2C0->DAT = g_u8WriteData;
I2C0->CTL0 = (I2C0->CTL0 & ~0x3c) | I2C_CTL_SI;
g_u8DataLen++;
}
else
{
g_u8DataLen = 0;
I2C0->CTL0 = (I2C0->CTL0 & ~0x3c) | (I2C_CTL_STO | I2C_CTL_SI);
g_u8EndFlag = 1;
}
}
else
{
ERROR("Status 0x%x is NOT processed\n", u32Status);
}
}
static uint32_t ma35d1_write_i2c_data(uint32_t u32Addr, uint32_t u32Data)
{
uint32_t I2C_TIME_OUT_COUNT = 0x20000;
uint32_t u32Status;
uint32_t u32time_out = 0;
g_uPageNum = 0;
if (g_uPageNum == 0xff)
{
ERROR("\n address error !!\n");
return 0;
}
g_u8RegAddr = u32Addr;
g_u8WriteData = u32Data;
g_u8EndFlag = 0x0;
I2C0->CTL0 = (I2C0->CTL0 & ~0x3c) | I2C_CTL_STA;
while (1)
{
if (I2C0->CTL0 & I2C_CTL_SI)
{
u32time_out = 0;
u32Status = I2C0->STATUS0;
I2C0_MasterTx(u32Status);
}
if (g_u8EndFlag)
{
break;
}
u32time_out++;
if (u32time_out > I2C_TIME_OUT_COUNT)
{
ERROR("i2c Write Time Out!\n");
return 0; // error
}
}
return 1;
}
static uint32_t ma35d1_read_i2c_data(uint32_t u32Addr, uint32_t *pu32Data)
{
uint32_t I2C_TIME_OUT_COUNT = 0x200000;
uint32_t u32Status;
uint32_t u32time_out = 0;
g_uPageNum = 0;
if (g_uPageNum == 0xff)
{
ERROR("\n address error !!\n");
return 0;
}
g_u8RegAddr = u32Addr;
g_u8EndFlag = 0x0;
I2C0->CTL0 = (I2C0->CTL0 & ~0x3c) | I2C_CTL_STA;
while (1)
{
if (I2C0->CTL0 & I2C_CTL_SI)
{
u32time_out = 0;
u32Status = I2C0->STATUS0;
I2C0_MasterRx(u32Status);
}
if (g_u8EndFlag)
{
break;
}
u32time_out++;
if (u32time_out > I2C_TIME_OUT_COUNT)
{
ERROR("i2c Read Time Out!\n");
return 1; // error
}
}
*pu32Data = g_u8RxData;
return 2;
}
static uint32_t ma35d1_read_pmic_data(uint32_t u32Addr, uint32_t *pu32Data)
{
uint32_t j = RETRY_COUNT;
while (j-- > 0)
{
if (ma35d1_read_i2c_data(u32Addr, pu32Data) == 2)
{
break;
}
}
if (j <= 0)
{
ERROR("\n READ ERROR! \n");
return 0;
}
return 1;
}
static uint32_t ma35d1_write_pmic_data(uint32_t u32Addr, uint32_t u32Data)
{
uint32_t j = RETRY_COUNT;
while (j-- > 0)
{
if (ma35d1_write_i2c_data(u32Addr, u32Data) == 1)
{
break;
}
}
if (j <= 0)
{
ERROR("\n WRITE ERROR [%d]! \n", j);
return 0;
}
return 1;
}
static void ma35d1_i2c0_init(uint32_t sys_clk)
{
unsigned long clk_rate;
uint32_t u32Div, speed;
outpw((void *)0x40460208, inpw((void *)0x40460208) | (0x3fff << 16)); // enable GPIO clock
outpw((void *)0x40460210, inpw((void *)0x40460210) | (0x1 << 0)); // I2C0 CLK
outpw(0x40460098, ((inpw(0x40460098) & ~0x0f000000) | (0x6 << 24))); // PD.6 I2C0_SDA
outpw(0x40460098, ((inpw(0x40460098) & ~0xf0000000) | (0x6 << 28))); // PD.7 I2C0_CLK
outpw(0x400400F0, 0x5 << 12); // pull high
/* i2c_clk = 100KHz */
clk_rate = sys_clk;
speed = 100 * 1000;
/* assume speed above 1000 are Hz-specified */
if (speed > 1000) speed = speed / 1000;
if (speed > 400) speed = 400;
u32Div = (uint32_t)(((clk_rate * 10U) / (speed * 4U) + 5U) / 10U - 1U);
I2C0->CLKDIV = u32Div;
I2C0->CTL0 = I2C0->CTL0 | I2C_CTL0_I2CEN_Msk; /* i2c enable */
}
uint32_t ma35d1_set_cpu_voltage(uint32_t sys_clk, uint32_t u32Vol)
{
/*
RegValue = (Voltage - 0.3) / 0.01
RegValue(hex) Voltage(v)
0x5B 1.22
0x5C 1.23
0x5D 1.24
0x5F 1.25
0x60 1.26
0x61 1.27
0x62 1.28
0x63 1.29
0x64 1.30
0x65 1.31
0x66 1.32
0x67 1.33
0x68 1.34
0x69 1.35
*/
uint32_t u32Data = 0;
if ((u32Vol < 0x59) || (u32Vol > 0x68))
return 0;
ma35d1_i2c0_init(sys_clk);
ma35d1_write_pmic_data(0xA4, u32Vol);
ma35d1_read_pmic_data(0xA4, &u32Data);
return (u32Data == u32Vol);
}
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