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keychron_qmk_firmware/drivers/usb2422.c

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/* Copyright 2021 QMK
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include "usb2422.h"
#include "i2c_master.h"
#include "wait.h"
#include "gpio.h"
/* -------- USB2422_VID : (USB2422L Offset: 0x00) (R/W 16) Vendor ID -------- */
typedef union {
struct {
uint16_t VID_LSB : 8;
uint16_t VID_MSB : 8;
} bit; /*!< Structure used for bit access */
uint16_t reg; /*!< Type used for register access */
} USB2422_VID_Type;
/* -------- USB2422_PID : (USB2422L Offset: 0x02) (R/W 16) Product ID -------- */
typedef union {
struct {
uint16_t PID_LSB : 8;
uint16_t PID_MSB : 8;
} bit; /*!< Structure used for bit access */
uint16_t reg; /*!< Type used for register access */
} USB2422_PID_Type;
/* -------- USB2422_DID : (USB2422L Offset: 0x04) (R/W 16) Device ID -------- */
typedef union {
struct {
uint16_t DID_LSB : 8;
uint16_t DID_MSB : 8;
} bit; /*!< Structure used for bit access */
uint16_t reg; /*!< Type used for register access */
} USB2422_DID_Type;
/* -------- USB2422_CFG1 : (USB2422L Offset: 0x06) (R/W 8) Configuration Data Byte 1-------- */
typedef union {
struct {
uint8_t PORT_PWR : 1;
uint8_t CURRENT_SNS : 2;
uint8_t EOP_DISABLE : 1;
uint8_t MTT_ENABLE : 1;
uint8_t HS_DISABLE : 1;
uint8_t : 1;
uint8_t SELF_BUS_PWR : 1;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_CFG1_Type;
/* -------- USB2422_CFG2 : (USB2422L Offset: 0x07) (R/W 8) Configuration Data Byte 2-------- */
typedef union {
struct {
uint8_t : 3;
uint8_t COMPOUND : 1;
uint8_t OC_TIMER : 2;
uint8_t : 1;
uint8_t DYNAMIC : 1;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_CFG2_Type;
/* -------- USB2422_CFG3 : (USB2422L Offset: 0x08) (R/W 16) Configuration Data Byte 3-------- */
typedef union {
struct {
uint8_t STRING_EN : 1;
uint8_t : 2;
uint8_t PRTMAP_EN : 1;
uint8_t : 4;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_CFG3_Type;
/* -------- USB2422_NRD : (USB2422L Offset: 0x09) (R/W 8) Non Removable Device -------- */
typedef union {
struct {
uint8_t : 5;
uint8_t PORT2_NR : 1;
uint8_t PORT1_NR : 1;
uint8_t : 1;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_NRD_Type;
/* -------- USB2422_PDS : (USB2422L Offset: 0x0A) (R/W 8) Port Diable for Self-Powered Operation -------- */
typedef union {
struct {
uint8_t : 1;
uint8_t PORT1_DIS : 1;
uint8_t PORT2_DIS : 1;
uint8_t : 5;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_PDS_Type;
/* -------- USB2422_PDB : (USB2422L Offset: 0x0B) (R/W 8) Port Diable for Bus-Powered Operation -------- */
typedef union {
struct {
uint8_t : 1;
uint8_t PORT1_DIS : 1;
uint8_t PORT2_DIS : 1;
uint8_t : 5;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_PDB_Type;
/* -------- USB2422_MAXPS : (USB2422L Offset: 0x0C) (R/W 8) Max Power for Self-Powered Operation -------- */
typedef union {
struct {
uint8_t MAX_PWR_SP : 8;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_MAXPS_Type;
/* -------- USB2422_MAXPB : (USB2422L Offset: 0x0D) (R/W 8) Max Power for Bus-Powered Operation -------- */
typedef union {
struct {
uint8_t MAX_PWR_BP : 8;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_MAXPB_Type;
/* -------- USB2422_HCMCS : (USB2422L Offset: 0x0E) (R/W 8) Hub Controller Max Current for Self-Powered Operation -------- */
typedef union {
struct {
uint8_t HC_MAX_C_SP : 8;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_HCMCS_Type;
/* -------- USB2422_HCMCB : (USB2422L Offset: 0x0F) (R/W 8) Hub Controller Max Current for Bus-Powered Operation -------- */
typedef union {
struct {
uint8_t HC_MAX_C_BP : 8;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_HCMCB_Type;
/* -------- USB2422_PWRT : (USB2422L Offset: 0x10) (R/W 8) Power On Time -------- */
typedef union {
struct {
uint8_t POWER_ON_TIME : 8;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_PWRT_Type;
/* -------- USB2422_LANGID LSB : (USB2422L Offset: 0x11) (R/W 16) Language ID -------- */
typedef union {
struct {
uint8_t LANGID_LSB : 8;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_LANGID_LSB_Type;
/* -------- USB2422_LANGID MSB : (USB2422L Offset: 0x12) (R/W 16) Language ID -------- */
typedef union {
struct {
uint8_t LANGID_MSB : 8;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_LANGID_MSB_Type;
/* -------- USB2422_MFRSL : (USB2422L Offset: 0x13) (R/W 8) Manufacturer String Length -------- */
typedef union {
struct {
uint8_t MFR_STR_LEN : 8;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_MFRSL_Type;
/* -------- USB2422_PRDSL : (USB2422L Offset: 0x14) (R/W 8) Product String Length -------- */
typedef union {
struct {
uint8_t PRD_STR_LEN : 8;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_PRDSL_Type;
/* -------- USB2422_SERSL : (USB2422L Offset: 0x15) (R/W 8) Serial String Length -------- */
typedef union {
struct {
uint8_t SER_STR_LEN : 8;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_SERSL_Type;
/* -------- USB2422_MFRSTR : (USB2422L Offset: 0x16-53) (R/W 8) Maufacturer String -------- */
typedef uint16_t USB2422_MFRSTR_Type;
/* -------- USB2422_PRDSTR : (USB2422L Offset: 0x54-91) (R/W 8) Product String -------- */
typedef uint16_t USB2422_PRDSTR_Type;
/* -------- USB2422_SERSTR : (USB2422L Offset: 0x92-CF) (R/W 8) Serial String -------- */
typedef uint16_t USB2422_SERSTR_Type;
/* -------- USB2422_BCEN : (USB2422L Offset: 0xD0) (R/W 8) Battery Charging Enable -------- */
typedef union {
struct {
uint8_t : 1;
uint8_t PORT1_BCE : 1;
uint8_t PORT2_BCE : 1;
uint8_t : 5;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_BCEN_Type;
/* -------- USB2422_BOOSTUP : (USB2422L Offset: 0xF6) (R/W 8) Boost Upstream -------- */
typedef union {
struct {
uint8_t BOOST : 2;
uint8_t : 6;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_BOOSTUP_Type;
/* -------- USB2422_BOOSTDOWN : (USB2422L Offset: 0xF8) (R/W 8) Boost Downstream -------- */
typedef union {
struct {
uint8_t BOOST1 : 2;
uint8_t BOOST2 : 2;
uint8_t : 4;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_BOOSTDOWN_Type;
/* -------- USB2422_PRTSP : (USB2422L Offset: 0xFA) (R/W 8) Port Swap -------- */
typedef union {
struct {
uint8_t : 1;
uint8_t PORT1_SP : 1;
uint8_t PORT2_SP : 1;
uint8_t : 5;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_PRTSP_Type;
/* -------- USB2422_PRTR12 : (USB2422L Offset: 0xFB) (R/W 8) Port 1/2 Remap -------- */
typedef union {
struct {
uint8_t PORT1_REMAP : 4;
uint8_t PORT2_REMAP : 4;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_PRTR12_Type;
#define USB2422_PRTR12_DISABLE 0
#define USB2422_PRT12_P2TOL1 1
#define USB2422_PRT12_P2XTOL2 2
#define USB2422_PRT12_P1TOL1 1
#define USB2422_PRT12_P1XTOL2 2
/* -------- USB2422_STCD : (USB2422L Offset: 0xFF) (R/W 8) Status Command -------- */
typedef union {
struct {
uint8_t USB_ATTACH : 1;
uint8_t RESET : 1;
uint8_t INTF_PWRDN : 1;
uint8_t : 5;
} bit; /*!< Structure used for bit access */
uint8_t reg; /*!< Type used for register access */
} USB2422_STCD_Type;
/** \brief USB2422 device hardware registers */
typedef struct {
USB2422_VID_Type VID; /**< \brief Offset: 0x00*/
USB2422_PID_Type PID; /**< \brief Offset: 0x02*/
USB2422_DID_Type DID; /**< \brief Offset: 0x04*/
USB2422_CFG1_Type CFG1; /**< \brief Offset: 0x06*/
USB2422_CFG2_Type CFG2; /**< \brief Offset: 0x07*/
USB2422_CFG3_Type CFG3; /**< \brief Offset: 0x08*/
USB2422_NRD_Type NRD; /**< \brief Offset: 0x09*/
USB2422_PDS_Type PDS; /**< \brief Offset: 0x0A*/
USB2422_PDB_Type PDB; /**< \brief Offset: 0x0B*/
USB2422_MAXPS_Type MAXPS; /**< \brief Offset: 0x0C*/
USB2422_MAXPB_Type MAXPB; /**< \brief Offset: 0x0D*/
USB2422_HCMCS_Type HCMCS; /**< \brief Offset: 0x0E*/
USB2422_HCMCB_Type HCMCB; /**< \brief Offset: 0x0F*/
USB2422_PWRT_Type PWRT; /**< \brief Offset: 0x10*/
USB2422_LANGID_LSB_Type LANGID_LSB; /**< \brief Offset: 0x11*/
USB2422_LANGID_MSB_Type LANGID_MSB; /**< \brief Offset: 0x12*/
USB2422_MFRSL_Type MFRSL; /**< \brief Offset: 0x13*/
USB2422_PRDSL_Type PRDSL; /**< \brief Offset: 0x14*/
USB2422_SERSL_Type SERSL; /**< \brief Offset: 0x15*/
USB2422_MFRSTR_Type MFRSTR[31]; /**< \brief Offset: 0x16*/
USB2422_PRDSTR_Type PRDSTR[31]; /**< \brief Offset: 0x54*/
USB2422_SERSTR_Type SERSTR[31]; /**< \brief Offset: 0x92*/
USB2422_BCEN_Type BCEN; /**< \brief Offset: 0xD0*/
uint8_t Reserved1[0x25];
USB2422_BOOSTUP_Type BOOSTUP; /**< \brief Offset: 0xF6*/
uint8_t Reserved2[0x1];
USB2422_BOOSTDOWN_Type BOOSTDOWN; /**< \brief Offset: 0xF8*/
uint8_t Reserved3[0x1];
USB2422_PRTSP_Type PRTSP; /**< \brief Offset: 0xFA*/
USB2422_PRTR12_Type PRTR12; /**< \brief Offset: 0xFB*/
uint8_t Reserved4[0x3];
USB2422_STCD_Type STCD; /**< \brief Offset: 0xFF*/
} Usb2422_t;
// ***************************************************************
static Usb2422_t config;
// ***************************************************************
/** \brief Handle the conversion to allow simple strings
*/
static void USB2422_strcpy(const char* str, USB2422_MFRSTR_Type* dest, uint8_t len) {
for (uint8_t i = 0; i < len; i++) {
dest[i] = str[i];
}
}
/** \brief Handle the conversion to allow simple strings
*/
static void USB2422_write_block(void) {
static unsigned char i2c0_buf[34];
unsigned char* dest = i2c0_buf;
unsigned char* src;
unsigned char* base = (unsigned char*)&config;
for (src = base; src < base + 256; src += 32) {
dest[0] = src - base;
dest[1] = 32;
memcpy(&dest[2], src, 32);
i2c_transmit(USB2422_ADDRESS, dest, 34, 50000);
wait_us(100);
}
}
// ***************************************************************
void USB2422_init(void) {
#ifdef USB2422_RESET_PIN
gpio_set_pin_output(USB2422_RESET_PIN);
#endif
#ifdef USB2422_ACTIVE_PIN
gpio_set_pin_input(USB2422_ACTIVE_PIN);
#endif
i2c_init(); // IC2 clk must be high at USB2422 reset release time to signal SMB configuration
}
void USB2422_configure(void) {
static const char SERNAME[] = "Unavailable";
memset(&config, 0, sizeof(Usb2422_t));
// configure Usb2422 registers
config.VID.reg = USB2422_VENDOR_ID;
config.PID.reg = USB2422_PRODUCT_ID;
config.DID.reg = USB2422_DEVICE_VER; // BCD format, eg 01.01
config.CFG1.bit.SELF_BUS_PWR = 1; // self powered for now
config.CFG1.bit.HS_DISABLE = 1; // full or high speed
// config.CFG2.bit.COMPOUND = 0; // compound device
config.CFG3.bit.STRING_EN = 1; // strings enabled
// config.NRD.bit.PORT2_NR = 0; // MCU is non-removable
config.MAXPB.reg = 20; // 0mA
config.HCMCB.reg = 20; // 0mA
config.MFRSL.reg = sizeof(USB2422_MANUFACTURER);
config.PRDSL.reg = sizeof(USB2422_PRODUCT);
config.SERSL.reg = sizeof(SERNAME);
USB2422_strcpy(USB2422_MANUFACTURER, config.MFRSTR, sizeof(USB2422_MANUFACTURER));
USB2422_strcpy(USB2422_PRODUCT, config.PRDSTR, sizeof(USB2422_PRODUCT));
USB2422_strcpy(SERNAME, config.SERSTR, sizeof(SERNAME));
// config.BOOSTUP.bit.BOOST=3; //upstream port
// config.BOOSTDOWN.bit.BOOST1=0; // extra port
// config.BOOSTDOWN.bit.BOOST2=2; //MCU is close
config.STCD.bit.USB_ATTACH = 1;
USB2422_write_block();
}
void USB2422_reset(void) {
#ifdef USB2422_RESET_PIN
gpio_write_pin_low(USB2422_RESET_PIN);
wait_us(2);
gpio_write_pin_high(USB2422_RESET_PIN);
#endif
}
bool USB2422_active(void) {
#ifdef USB2422_ACTIVE_PIN
return gpio_read_pin(USB2422_ACTIVE_PIN);
#else
return 1;
#endif
}
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