// SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
/*
* UCSI driver for STMicroelectronics STM32G0 Type-C PD controller
*
* Copyright (C) 2022, STMicroelectronics - All Rights Reserved
* Author: Fabrice Gasnier <[email protected]>.
*/
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/unaligned.h>
#include "ucsi.h"
/* STM32G0 I2C bootloader addr: 0b1010001x (See AN2606) */
#define STM32G0_I2C_BL_ADDR (0xa2 >> 1)
/* STM32G0 I2C bootloader max data size */
#define STM32G0_I2C_BL_SZ 256
/* STM32 I2C bootloader commands (See AN4221) */
#define STM32_CMD_GVR 0x01 /* Gets the bootloader version */
#define STM32_CMD_GVR_LEN 1
#define STM32_CMD_RM 0x11 /* Reag memory */
#define STM32_CMD_WM 0x31 /* Write memory */
#define STM32_CMD_ADDR_LEN 5 /* Address len for go, mem write... */
#define STM32_CMD_ERASE 0x44 /* Erase page, bank or all */
#define STM32_CMD_ERASE_SPECIAL_LEN 3
#define STM32_CMD_GLOBAL_MASS_ERASE 0xffff /* All-bank erase */
/* STM32 I2C bootloader answer status */
#define STM32G0_I2C_BL_ACK 0x79
#define STM32G0_I2C_BL_NACK 0x1f
#define STM32G0_I2C_BL_BUSY 0x76
/* STM32G0 flash definitions */
#define STM32G0_USER_OPTION_BYTES 0x1fff7800
#define STM32G0_USER_OB_NBOOT0 BIT(26)
#define STM32G0_USER_OB_NBOOT_SEL BIT(24)
#define STM32G0_USER_OB_BOOT_MAIN (STM32G0_USER_OB_NBOOT0 | STM32G0_USER_OB_NBOOT_SEL)
#define STM32G0_MAIN_MEM_ADDR 0x08000000
/* STM32 Firmware definitions: additional commands */
#define STM32G0_FW_GETVER 0x00 /* Gets the firmware version */
#define STM32G0_FW_GETVER_LEN 4
#define STM32G0_FW_RSTGOBL 0x21 /* Reset and go to bootloader */
#define STM32G0_FW_KEYWORD 0xa56959a6
/* ucsi_stm32g0_fw_info located at the end of the firmware */
struct ucsi_stm32g0_fw_info {
u32 version;
u32 keyword;
};
struct ucsi_stm32g0 {
struct i2c_client *client;
struct i2c_client *i2c_bl;
bool in_bootloader;
u8 bl_version;
struct device *dev;
const char *fw_name;
struct ucsi *ucsi;
bool suspended;
bool wakeup_event;
};
/*
* Bootloader commands helpers:
* - send command (2 bytes)
* - check ack
* Then either:
* - receive data
* - receive data + check ack
* - send data + check ack
* These operations depends on the command and have various length.
*/
static int ucsi_stm32g0_bl_check_ack(struct ucsi *ucsi)
{
struct ucsi_stm32g0 *g0 = ucsi_get_drvdata(ucsi);
struct i2c_client *client = g0->i2c_bl;
unsigned char ack;
struct i2c_msg msg[] = {
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = 1,
.buf = &ack,
},
};
int ret;
ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
if (ret != ARRAY_SIZE(msg)) {
dev_err(g0->dev, "i2c bl ack (%02x), error: %d\n", client->addr, ret);
return ret < 0 ? ret : -EIO;
}
/* The 'ack' byte should contain bootloader answer: ack/nack/busy */
switch (ack) {
case STM32G0_I2C_BL_ACK:
return 0;
case STM32G0_I2C_BL_NACK:
return -ENOENT;
case STM32G0_I2C_BL_BUSY:
return -EBUSY;
default:
dev_err(g0->dev, "i2c bl ack (%02x), invalid byte: %02x\n",
client->addr, ack);
return -EINVAL;
}
}
static int ucsi_stm32g0_bl_cmd_check_ack(struct ucsi *ucsi, unsigned int cmd, bool check_ack)
{
struct ucsi_stm32g0 *g0 = ucsi_get_drvdata(ucsi);
struct i2c_client *client = g0->i2c_bl;
unsigned char buf[2];
struct i2c_msg msg[] = {
{
.addr = client->addr,
.flags = 0,
.len = sizeof(buf),
.buf = buf,
},
};
int ret;
/*
* Send STM32 bootloader command format is two bytes:
* - command code
* - XOR'ed command code
*/
buf[0] = cmd;
buf[1] = cmd ^ 0xff;
ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
if (ret != ARRAY_SIZE(msg)) {
dev_dbg(g0->dev, "i2c bl cmd %d (%02x), error: %d\n", cmd, client->addr, ret);
return ret < 0 ? ret : -EIO;
}
if (check_ack)
return ucsi_stm32g0_bl_check_ack(ucsi);
return 0;
}
static int ucsi_stm32g0_bl_cmd(struct ucsi *ucsi, unsigned int cmd)
{
return ucsi_stm32g0_bl_cmd_check_ack(ucsi, cmd, true);
}
static int ucsi_stm32g0_bl_rcv_check_ack(struct ucsi *ucsi, void *data, size_t len, bool check_ack)
{
struct ucsi_stm32g0 *g0 = ucsi_get_drvdata(ucsi);
struct i2c_client *client = g0->i2c_bl;
struct i2c_msg msg[] = {
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = len,
.buf = data,
},
};
int ret;
ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
if (ret != ARRAY_SIZE(msg)) {
dev_err(g0->dev, "i2c bl rcv %02x, error: %d\n", client->addr, ret);
return ret < 0 ? ret : -EIO;
}
if (check_ack)
return ucsi_stm32g0_bl_check_ack(ucsi);
return 0;
}
static int ucsi_stm32g0_bl_rcv(struct ucsi *ucsi, void *data, size_t len)
{
return ucsi_stm32g0_bl_rcv_check_ack(ucsi, data, len, true);
}
static int ucsi_stm32g0_bl_rcv_woack(struct ucsi *ucsi, void *data, size_t len)
{
return ucsi_stm32g0_bl_rcv_check_ack(ucsi, data, len, false);
}
static int ucsi_stm32g0_bl_send(struct ucsi *ucsi, void *data, size_t len)
{
struct ucsi_stm32g0 *g0 = ucsi_get_drvdata(ucsi);
struct i2c_client *client = g0->i2c_bl;
struct i2c_msg msg[] = {
{
.addr = client->addr,
.flags = 0,
.len = len,
.buf = data,
},
};
int ret;
ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
if (ret != ARRAY_SIZE(msg)) {
dev_err(g0->dev, "i2c bl send %02x, error: %d\n", client->addr, ret);
return ret < 0 ? ret : -EIO;
}
return ucsi_stm32g0_bl_check_ack(ucsi);
}
/* Bootloader commands */
static int ucsi_stm32g0_bl_get_version(struct ucsi *ucsi, u8 *bl_version)
{
int ret;
ret = ucsi_stm32g0_bl_cmd(ucsi, STM32_CMD_GVR);
if (ret)
return ret;
return ucsi_stm32g0_bl_rcv(ucsi, bl_version, STM32_CMD_GVR_LEN);
}
static int ucsi_stm32g0_bl_send_addr(struct ucsi *ucsi, u32 addr)
{
u8 data8[STM32_CMD_ADDR_LEN];
/* Address format: 4 bytes addr (MSB first) + XOR'ed addr bytes */
put_unaligned_be32(addr, data8);
data8[4] = data8[0] ^ data8[1] ^ data8[2] ^ data8[3];
return ucsi_stm32g0_bl_send(ucsi, data8, STM32_CMD_ADDR_LEN);
}
static int ucsi_stm32g0_bl_global_mass_erase(struct ucsi *ucsi)
{
u8 data8[4];
u16 *data16 = (u16 *)&data8[0];
int ret;
data16[0] = STM32_CMD_GLOBAL_MASS_ERASE;
data8[2] = data8[0] ^ data8[1];
ret = ucsi_stm32g0_bl_cmd(ucsi, STM32_CMD_ERASE);
if (ret)
return ret;
return ucsi_stm32g0_bl_send(ucsi, data8, STM32_CMD_ERASE_SPECIAL_LEN);
}
static int ucsi_stm32g0_bl_write(struct ucsi *ucsi, u32 addr, const void *data, size_t len)
{
u8 *data8;
int i, ret;
if (!len || len > STM32G0_I2C_BL_SZ)
return -EINVAL;
/* Write memory: len bytes -1, data up to 256 bytes + XOR'ed bytes */
data8 = kmalloc(STM32G0_I2C_BL_SZ + 2, GFP_KERNEL);
if (!data8)
return -ENOMEM;
ret = ucsi_stm32g0_bl_cmd(ucsi, STM32_CMD_WM);
if (ret)
goto free;
ret = ucsi_stm32g0_bl_send_addr(ucsi, addr);
if (ret)
goto free;
data8[0] = len - 1;
memcpy(data8 + 1, data, len);
data8[len + 1] = data8[0];
for (i = 1; i <= len; i++)
data8[len + 1] ^= data8[i];
ret = ucsi_stm32g0_bl_send(ucsi, data8, len + 2);
free:
kfree(data8);
return ret;
}
static int ucsi_stm32g0_bl_read(struct ucsi *ucsi, u32 addr, void *data, size_t len)
{
int ret;
if (!len || len > STM32G0_I2C_BL_SZ)
return -EINVAL;
ret = ucsi_stm32g0_bl_cmd(ucsi, STM32_CMD_RM);
if (ret)
return ret;
ret = ucsi_stm32g0_bl_send_addr(ucsi, addr);
if (ret)
return ret;
ret = ucsi_stm32g0_bl_cmd(ucsi, len - 1);
if (ret)
return ret;
return ucsi_stm32g0_bl_rcv_woack(ucsi, data, len);
}
/* Firmware commands (the same address as the bootloader) */
static int ucsi_stm32g0_fw_cmd(struct ucsi *ucsi, unsigned int cmd)
{
return ucsi_stm32g0_bl_cmd_check_ack(ucsi, cmd, false);
}
static int ucsi_stm32g0_fw_rcv(struct ucsi *ucsi, void *data, size_t len)
{
return ucsi_stm32g0_bl_rcv_woack(ucsi, data, len);
}
/* UCSI ops */
static int ucsi_stm32g0_read(struct ucsi *ucsi, unsigned int offset, void *val, size_t len)
{
struct ucsi_stm32g0 *g0 = ucsi_get_drvdata(ucsi);
struct i2c_client *client = g0->client;
u8 reg = offset;
struct i2c_msg msg[] = {
{
.addr = client->addr,
.flags = 0,
.len = 1,
.buf = ®,
},
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = len,
.buf = val,
},
};
int ret;
ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
if (ret != ARRAY_SIZE(msg)) {
dev_err(g0->dev, "i2c read %02x, %02x error: %d\n", client->addr, reg, ret);
return ret < 0 ? ret : -EIO;
}
return 0;
}
static int ucsi_stm32g0_read_version(struct ucsi *ucsi, u16 *version)
{
return ucsi_stm32g0_read(ucsi, UCSI_VERSION, version, sizeof(*version));
}
static int ucsi_stm32g0_read_cci(struct ucsi *ucsi, u32 *cci)
{
return ucsi_stm32g0_read(ucsi, UCSI_CCI, cci, sizeof(*cci));
}
static int ucsi_stm32g0_read_message_in(struct ucsi *ucsi, void *val, size_t len)
{
return ucsi_stm32g0_read(ucsi, UCSI_MESSAGE_IN, val, len);
}
static int ucsi_stm32g0_async_control(struct ucsi *ucsi, u64 command)
{
struct ucsi_stm32g0 *g0 = ucsi_get_drvdata(ucsi);
struct i2c_client *client = g0->client;
struct i2c_msg msg[] = {
{
.addr = client->addr,
.flags = 0,
}
};
unsigned char *buf;
int ret;
buf = kmalloc(sizeof(command) + 1, GFP_KERNEL);
if (!buf)
return -ENOMEM;
buf[0] = UCSI_CONTROL;
memcpy(&buf[1], &command, sizeof(command));
msg[0].len = sizeof(command) + 1;
msg[0].buf = buf;
ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
kfree(buf);
if (ret != ARRAY_SIZE(msg)) {
dev_err(g0->dev, "i2c write %02x, %02x error: %d\n", client->addr, UCSI_CONTROL, ret);
return ret < 0 ? ret : -EIO;
}
return 0;
}
static irqreturn_t ucsi_stm32g0_irq_handler(int irq, void *data)
{
struct ucsi_stm32g0 *g0 = data;
u32 cci;
int ret;
if (g0->suspended)
g0->wakeup_event = true;
ret = ucsi_stm32g0_read(g0->ucsi, UCSI_CCI, &cci, sizeof(cci));
if (ret)
return IRQ_NONE;
ucsi_notify_common(g0->ucsi, cci);
return IRQ_HANDLED;
}
static const struct ucsi_operations ucsi_stm32g0_ops = {
.read_version = ucsi_stm32g0_read_version,
.read_cci = ucsi_stm32g0_read_cci,
.read_message_in = ucsi_stm32g0_read_message_in,
.sync_control = ucsi_sync_control_common,
.async_control = ucsi_stm32g0_async_control,
};
static int ucsi_stm32g0_register(struct ucsi *ucsi)
{
struct ucsi_stm32g0 *g0 = ucsi_get_drvdata(ucsi);
struct i2c_client *client = g0->client;
int ret;
/* Request alert interrupt */
ret = request_threaded_irq(client->irq, NULL, ucsi_stm32g0_irq_handler, IRQF_ONESHOT,
dev_name(g0->dev), g0);
if (ret) {
dev_err(g0->dev, "request IRQ failed: %d\n", ret);
return ret;
}
ret = ucsi_register(ucsi);
if (ret) {
dev_err_probe(g0->dev, ret, "ucsi_register failed\n");
free_irq(client->irq, g0);
return ret;
}
return 0;
}
static void ucsi_stm32g0_unregister(struct ucsi *ucsi)
{
struct ucsi_stm32g0 *g0 = ucsi_get_drvdata(ucsi);
struct i2c_client *client = g0->client;
ucsi_unregister(ucsi);
free_irq(client->irq, g0);
}
static void ucsi_stm32g0_fw_cb(const struct firmware *fw, void *context)
{
struct ucsi_stm32g0 *g0;
const u8 *data, *end;
const struct ucsi_stm32g0_fw_info *fw_info;
u32 addr = STM32G0_MAIN_MEM_ADDR, ob, fw_version;
int ret, size;
if (!context)
return;
g0 = ucsi_get_drvdata(context);
if (!fw)
goto fw_release;
fw_info = (struct ucsi_stm32g0_fw_info *)(fw->data + fw->size - sizeof(*fw_info));
if (!g0->in_bootloader) {
/* Read running firmware version */
ret = ucsi_stm32g0_fw_cmd(g0->ucsi, STM32G0_FW_GETVER);
if (ret) {
dev_err(g0->dev, "Get version cmd failed %d\n", ret);
goto fw_release;
}
ret = ucsi_stm32g0_fw_rcv(g0->ucsi, &fw_version,
STM32G0_FW_GETVER_LEN);
if (ret) {
dev_err(g0->dev, "Get version failed %d\n", ret);
goto fw_release;
}
/* Sanity check on keyword and firmware version */
if (fw_info->keyword != STM32G0_FW_KEYWORD || fw_info->version == fw_version)
goto fw_release;
dev_info(g0->dev, "Flashing FW: %08x (%08x cur)\n", fw_info->version, fw_version);
/* Switch to bootloader mode */
ucsi_stm32g0_unregister(g0->ucsi);
ret = ucsi_stm32g0_fw_cmd(g0->ucsi, STM32G0_FW_RSTGOBL);
if (ret) {
dev_err(g0->dev, "bootloader cmd failed %d\n", ret);
goto fw_release;
}
g0->in_bootloader = true;
/* STM32G0 reboot delay */
msleep(100);
}
ret = ucsi_stm32g0_bl_global_mass_erase(g0->ucsi);
if (ret) {
dev_err(g0->dev, "Erase failed %d\n", ret);
goto fw_release;
}
data = fw->data;
end = fw->data + fw->size;
while (data < end) {
if ((end - data) < STM32G0_I2C_BL_SZ)
size = end - data;
else
size = STM32G0_I2C_BL_SZ;
ret = ucsi_stm32g0_bl_write(g0->ucsi, addr, data, size);
if (ret) {
dev_err(g0->dev, "Write failed %d\n", ret);
goto fw_release;
}
addr += size;
data += size;
}
dev_dbg(g0->dev, "Configure to boot from main flash\n");
ret = ucsi_stm32g0_bl_read(g0->ucsi, STM32G0_USER_OPTION_BYTES, &ob, sizeof(ob));
if (ret) {
dev_err(g0->dev, "read user option bytes failed %d\n", ret);
goto fw_release;
}
dev_dbg(g0->dev, "STM32G0_USER_OPTION_BYTES 0x%08x\n", ob);
/* Configure user option bytes to boot from main flash next time */
ob |= STM32G0_USER_OB_BOOT_MAIN;
/* Writing option bytes will also reset G0 for updates to be loaded */
ret = ucsi_stm32g0_bl_write(g0->ucsi, STM32G0_USER_OPTION_BYTES, &ob, sizeof(ob));
if (ret) {
dev_err(g0->dev, "write user option bytes failed %d\n", ret);
goto fw_release;
}
dev_info(g0->dev, "Starting, option bytes:0x%08x\n", ob);
/* STM32G0 FW boot delay */
msleep(500);
/* Register UCSI interface */
if (!ucsi_stm32g0_register(g0->ucsi))
g0->in_bootloader = false;
fw_release:
release_firmware(fw);
}
static int ucsi_stm32g0_probe_bootloader(struct ucsi *ucsi)
{
struct ucsi_stm32g0 *g0 = ucsi_get_drvdata(ucsi);
int ret;
u16 ucsi_version;
/* firmware-name is optional */
if (device_property_present(g0->dev, "firmware-name")) {
ret = device_property_read_string(g0->dev, "firmware-name", &g0->fw_name);
if (ret < 0)
return dev_err_probe(g0->dev, ret, "Error reading firmware-name\n");
}
if (g0->fw_name) {
/* STM32G0 in bootloader mode communicates at reserved address 0x51 */
g0->i2c_bl = i2c_new_dummy_device(g0->client->adapter, STM32G0_I2C_BL_ADDR);
if (IS_ERR(g0->i2c_bl)) {
ret = dev_err_probe(g0->dev, PTR_ERR(g0->i2c_bl),
"Failed to register bootloader I2C address\n");
return ret;
}
}
/*
* Try to guess if the STM32G0 is running a UCSI firmware. First probe the UCSI FW at its
* i2c address. Fallback to bootloader i2c address only if firmware-name is specified.
*/
ret = ucsi_stm32g0_read(ucsi, UCSI_VERSION, &ucsi_version, sizeof(ucsi_version));
if (!ret || !g0->fw_name)
return ret;
/* Speculatively read the bootloader version that has a known length. */
ret = ucsi_stm32g0_bl_get_version(ucsi, &g0->bl_version);
if (ret < 0) {
i2c_unregister_device(g0->i2c_bl);
return ret;
}
/* Device in bootloader mode */
g0->in_bootloader = true;
dev_info(g0->dev, "Bootloader Version 0x%02x\n", g0->bl_version);
return 0;
}
static int ucsi_stm32g0_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct ucsi_stm32g0 *g0;
int ret;
g0 = devm_kzalloc(dev, sizeof(*g0), GFP_KERNEL);
if (!g0)
return -ENOMEM;
g0->dev = dev;
g0->client = client;
i2c_set_clientdata(client, g0);
g0->ucsi = ucsi_create(dev, &ucsi_stm32g0_ops);
if (IS_ERR(g0->ucsi))
return PTR_ERR(g0->ucsi);
ucsi_set_drvdata(g0->ucsi, g0);
ret = ucsi_stm32g0_probe_bootloader(g0->ucsi);
if (ret < 0)
goto destroy;
/*
* Don't register in bootloader mode: wait for the firmware to be loaded and started before
* registering UCSI device.
*/
if (!g0->in_bootloader) {
ret = ucsi_stm32g0_register(g0->ucsi);
if (ret < 0)
goto freei2c;
}
if (g0->fw_name) {
/*
* Asynchronously flash (e.g. bootloader mode) or update the running firmware,
* not to hang the boot process
*/
ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_UEVENT, g0->fw_name, g0->dev,
GFP_KERNEL, g0->ucsi, ucsi_stm32g0_fw_cb);
if (ret < 0) {
dev_err_probe(dev, ret, "firmware request failed\n");
goto unregister;
}
}
return 0;
unregister:
if (!g0->in_bootloader)
ucsi_stm32g0_unregister(g0->ucsi);
freei2c:
if (g0->fw_name)
i2c_unregister_device(g0->i2c_bl);
destroy:
ucsi_destroy(g0->ucsi);
return ret;
}
static void ucsi_stm32g0_remove(struct i2c_client *client)
{
struct ucsi_stm32g0 *g0 = i2c_get_clientdata(client);
if (!g0->in_bootloader)
ucsi_stm32g0_unregister(g0->ucsi);
if (g0->fw_name)
i2c_unregister_device(g0->i2c_bl);
ucsi_destroy(g0->ucsi);
}
static int ucsi_stm32g0_suspend(struct device *dev)
{
struct ucsi_stm32g0 *g0 = dev_get_drvdata(dev);
struct i2c_client *client = g0->client;
if (g0->in_bootloader)
return 0;
/* Keep the interrupt disabled until the i2c bus has been resumed */
disable_irq(client->irq);
g0->suspended = true;
g0->wakeup_event = false;
if (device_may_wakeup(dev) || device_wakeup_path(dev))
enable_irq_wake(client->irq);
return 0;
}
static int ucsi_stm32g0_resume(struct device *dev)
{
struct ucsi_stm32g0 *g0 = dev_get_drvdata(dev);
struct i2c_client *client = g0->client;
if (g0->in_bootloader)
return 0;
if (device_may_wakeup(dev) || device_wakeup_path(dev))
disable_irq_wake(client->irq);
enable_irq(client->irq);
/* Enforce any pending handler gets called to signal a wakeup_event */
synchronize_irq(client->irq);
if (g0->wakeup_event)
pm_wakeup_event(g0->dev, 0);
g0->suspended = false;
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(ucsi_stm32g0_pm_ops, ucsi_stm32g0_suspend, ucsi_stm32g0_resume);
static const struct of_device_id __maybe_unused ucsi_stm32g0_typec_of_match[] = {
{ .compatible = "st,stm32g0-typec" },
{},
};
MODULE_DEVICE_TABLE(of, ucsi_stm32g0_typec_of_match);
static const struct i2c_device_id ucsi_stm32g0_typec_i2c_devid[] = {
{ "stm32g0-typec" },
{}
};
MODULE_DEVICE_TABLE(i2c, ucsi_stm32g0_typec_i2c_devid);
static struct i2c_driver ucsi_stm32g0_i2c_driver = {
.driver = {
.name = "ucsi-stm32g0-i2c",
.of_match_table = of_match_ptr(ucsi_stm32g0_typec_of_match),
.pm = pm_sleep_ptr(&ucsi_stm32g0_pm_ops),
},
.probe = ucsi_stm32g0_probe,
.remove = ucsi_stm32g0_remove,
.id_table = ucsi_stm32g0_typec_i2c_devid
};
module_i2c_driver(ucsi_stm32g0_i2c_driver);
MODULE_AUTHOR("Fabrice Gasnier <[email protected]>");
MODULE_DESCRIPTION("STMicroelectronics STM32G0 Type-C controller");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS("platform:ucsi-stm32g0");
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