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esp-idf/components/usb/usb_phy.c

402 wiersze
17 KiB
C
Czysty Wina Historia

/*
* SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <esp_types.h>
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "esp_log.h"
#include "esp_check.h"
#include "esp_private/periph_ctrl.h"
#include "esp_private/usb_phy.h"
#include "soc/usb_dwc_periph.h"
#include "hal/usb_wrap_hal.h"
#include "hal/usb_serial_jtag_hal.h"
#include "esp_rom_gpio.h"
#include "driver/gpio.h"
#include "hal/gpio_ll.h"
#include "soc/soc_caps.h"
#include "soc/usb_pins.h"
#if !SOC_RCC_IS_INDEPENDENT
#define USB_WRAP_RCC_ATOMIC() PERIPH_RCC_ATOMIC()
#else
#define USB_WRAP_RCC_ATOMIC()
#endif
static const char *USBPHY_TAG = "usb_phy";
#define USBPHY_NOT_INIT_ERR_STR "USB_PHY is not initialized"
typedef struct phy_context_t phy_context_t;
struct phy_context_t {
usb_phy_target_t target; /**< PHY target */
usb_phy_controller_t controller; /**< PHY controller */
usb_phy_status_t status; /**< PHY status */
usb_otg_mode_t otg_mode; /**< USB OTG mode */
usb_phy_speed_t otg_speed; /**< USB speed */
usb_phy_ext_io_conf_t *iopins; /**< external PHY I/O pins */
usb_wrap_hal_context_t wrap_hal; /**< USB WRAP HAL context */
#if SOC_USB_SERIAL_JTAG_SUPPORTED
usb_serial_jtag_hal_context_t usj_hal; /**< USJ HAL context */
#endif
};
typedef struct {
phy_context_t *internal_phy; /**< internal PHY context */
phy_context_t *external_phy; /**< external PHY context */
uint32_t ref_count; /**< reference count used to protect p_phy_ctrl_obj */
} phy_ctrl_obj_t;
/**
* @brief A pin descriptor for initialize external PHY I/O pins
*/
typedef struct {
int pin; /**< GPIO pin num */
const int func; /**< GPIO matrix signal */
const bool is_output; /**< input/output signal */
} usb_iopin_dsc_t;
static phy_ctrl_obj_t *p_phy_ctrl_obj = NULL;
static portMUX_TYPE phy_spinlock = portMUX_INITIALIZER_UNLOCKED;
static esp_err_t phy_iopins_configure(const usb_iopin_dsc_t *usb_periph_iopins, int iopins_num)
{
for (int i = 0; i < iopins_num; i++) {
const usb_iopin_dsc_t iopin = usb_periph_iopins[i];
if (iopin.pin != GPIO_NUM_NC) {
ESP_RETURN_ON_FALSE((iopin.is_output && GPIO_IS_VALID_OUTPUT_GPIO(iopin.pin)) ||
(!iopin.is_output && GPIO_IS_VALID_GPIO(iopin.pin)),
ESP_ERR_INVALID_ARG, USBPHY_TAG, "io_num argument is invalid");
esp_rom_gpio_pad_select_gpio(iopin.pin);
if (iopin.is_output) {
esp_rom_gpio_connect_out_signal(iopin.pin, iopin.func, false, false);
} else {
esp_rom_gpio_connect_in_signal(iopin.pin, iopin.func, false);
gpio_ll_input_enable(&GPIO, iopin.pin);
}
esp_rom_gpio_pad_unhold(iopin.pin);
}
}
return ESP_OK;
}
static esp_err_t phy_external_iopins_configure(const usb_phy_ext_io_conf_t *ext_io_conf)
{
const usb_iopin_dsc_t usb_periph_iopins[] = {
{ext_io_conf->vp_io_num, usb_otg_periph_signal.extphy_vp_in, false},
{ext_io_conf->vm_io_num, usb_otg_periph_signal.extphy_vm_in, false},
{ext_io_conf->rcv_io_num, usb_otg_periph_signal.extphy_rcv_in, false},
{ext_io_conf->oen_io_num, usb_otg_periph_signal.extphy_oen_out, true},
{ext_io_conf->vpo_io_num, usb_otg_periph_signal.extphy_vpo_out, true},
{ext_io_conf->vmo_io_num, usb_otg_periph_signal.extphy_vmo_out, true},
};
return phy_iopins_configure(usb_periph_iopins, sizeof(usb_periph_iopins) / sizeof(usb_iopin_dsc_t));
}
static esp_err_t phy_otg_iopins_configure(const usb_phy_otg_io_conf_t *otg_io_conf)
{
const usb_iopin_dsc_t usb_periph_iopins[] = {
{otg_io_conf->iddig_io_num, usb_otg_periph_signal.otg_iddig_in, false},
{otg_io_conf->avalid_io_num, usb_otg_periph_signal.otg_avalid_in, false},
{otg_io_conf->vbusvalid_io_num, usb_otg_periph_signal.otg_vbusvalid_in, false},
{otg_io_conf->idpullup_io_num, usb_otg_periph_signal.otg_idpullup_out, true},
{otg_io_conf->dppulldown_io_num, usb_otg_periph_signal.otg_dppulldown_out, true},
{otg_io_conf->dmpulldown_io_num, usb_otg_periph_signal.otg_dmpulldown_out, true},
{otg_io_conf->drvvbus_io_num, usb_otg_periph_signal.otg_drvvbus_out, true},
{otg_io_conf->bvalid_io_num, usb_otg_periph_signal.srp_bvalid_in, false},
{otg_io_conf->sessend_io_num, usb_otg_periph_signal.srp_sessend_in, false},
{otg_io_conf->chrgvbus_io_num, usb_otg_periph_signal.srp_chrgvbus_out, true},
{otg_io_conf->dischrgvbus_io_num, usb_otg_periph_signal.srp_dischrgvbus_out, true},
};
return phy_iopins_configure(usb_periph_iopins, sizeof(usb_periph_iopins) / sizeof(usb_iopin_dsc_t));
}
esp_err_t usb_phy_otg_set_mode(usb_phy_handle_t handle, usb_otg_mode_t mode)
{
ESP_RETURN_ON_FALSE(handle, ESP_ERR_INVALID_ARG, USBPHY_TAG, "handle argument is invalid");
ESP_RETURN_ON_FALSE(mode < USB_OTG_MODE_MAX, ESP_ERR_INVALID_ARG, USBPHY_TAG, "mode argument is invalid");
ESP_RETURN_ON_FALSE(handle->controller == USB_PHY_CTRL_OTG, ESP_FAIL, USBPHY_TAG, "phy source is not USB_OTG");
handle->otg_mode = mode;
if (mode == USB_OTG_MODE_HOST) {
esp_rom_gpio_connect_in_signal(GPIO_MATRIX_CONST_ZERO_INPUT, USB_OTG_IDDIG_IN_IDX, false); // connected connector is A side
esp_rom_gpio_connect_in_signal(GPIO_MATRIX_CONST_ZERO_INPUT, USB_SRP_BVALID_IN_IDX, false);
esp_rom_gpio_connect_in_signal(GPIO_MATRIX_CONST_ONE_INPUT, USB_OTG_VBUSVALID_IN_IDX, false); // receiving a valid Vbus from host
esp_rom_gpio_connect_in_signal(GPIO_MATRIX_CONST_ONE_INPUT, USB_OTG_AVALID_IN_IDX, false); // HIGH to force USB host mode
if (handle->target == USB_PHY_TARGET_INT) {
// Configure pull resistors for host
usb_wrap_pull_override_vals_t vals = {
.dp_pu = false,
.dm_pu = false,
.dp_pd = true,
.dm_pd = true,
};
usb_wrap_hal_phy_enable_pull_override(&handle->wrap_hal, &vals);
}
} else if (mode == USB_OTG_MODE_DEVICE) {
esp_rom_gpio_connect_in_signal(GPIO_MATRIX_CONST_ONE_INPUT, USB_OTG_IDDIG_IN_IDX, false); // connected connector is mini-B side
esp_rom_gpio_connect_in_signal(GPIO_MATRIX_CONST_ONE_INPUT, USB_SRP_BVALID_IN_IDX, false); // HIGH to force USB device mode
esp_rom_gpio_connect_in_signal(GPIO_MATRIX_CONST_ONE_INPUT, USB_OTG_VBUSVALID_IN_IDX, false); // receiving a valid Vbus from device
esp_rom_gpio_connect_in_signal(GPIO_MATRIX_CONST_ZERO_INPUT, USB_OTG_AVALID_IN_IDX, false);
}
return ESP_OK;
}
esp_err_t usb_phy_otg_dev_set_speed(usb_phy_handle_t handle, usb_phy_speed_t speed)
{
ESP_RETURN_ON_FALSE(handle, ESP_ERR_INVALID_ARG, USBPHY_TAG, "handle argument is invalid");
ESP_RETURN_ON_FALSE(speed < USB_PHY_SPEED_MAX, ESP_ERR_INVALID_ARG, USBPHY_TAG, "speed argument is invalid");
ESP_RETURN_ON_FALSE(handle->controller == USB_PHY_CTRL_OTG, ESP_FAIL, USBPHY_TAG, "phy source is not USB_OTG");
ESP_RETURN_ON_FALSE((handle->target == USB_PHY_TARGET_INT && handle->otg_mode == USB_OTG_MODE_DEVICE), ESP_FAIL,
USBPHY_TAG, "set speed not supported");
handle->otg_speed = speed;
// Configure pull resistors for device
usb_wrap_pull_override_vals_t vals = {
.dp_pd = false,
.dm_pd = false,
};
if (speed == USB_PHY_SPEED_LOW) {
vals.dp_pu = false;
vals.dm_pu = true;
} else {
vals.dp_pu = true;
vals.dm_pu = false;
}
usb_wrap_hal_phy_enable_pull_override(&handle->wrap_hal, &vals);
return ESP_OK;
}
esp_err_t usb_phy_action(usb_phy_handle_t handle, usb_phy_action_t action)
{
ESP_RETURN_ON_FALSE(handle, ESP_ERR_INVALID_ARG, USBPHY_TAG, "handle argument is invalid");
ESP_RETURN_ON_FALSE(action < USB_PHY_ACTION_MAX, ESP_ERR_INVALID_ARG, USBPHY_TAG, "action argument is invalid");
ESP_RETURN_ON_FALSE((action == USB_PHY_ACTION_HOST_ALLOW_CONN && handle->controller == USB_PHY_CTRL_OTG) ||
(action == USB_PHY_ACTION_HOST_FORCE_DISCONN && handle->controller == USB_PHY_CTRL_OTG),
ESP_ERR_INVALID_ARG, USBPHY_TAG, "wrong target for the action");
esp_err_t ret = ESP_OK;
switch (action) {
case USB_PHY_ACTION_HOST_ALLOW_CONN:
if (handle->target == USB_PHY_TARGET_INT) {
usb_wrap_hal_phy_enable_test_mode(&handle->wrap_hal, false);
} else {
if (!handle->iopins) {
ret = ESP_FAIL;
ESP_LOGE(USBPHY_TAG, "no I/O pins provided for connection");
break;
}
/*
Allow for connections on the external PHY by connecting the VP and VM signals to the external PHY.
*/
esp_rom_gpio_connect_in_signal(handle->iopins->vp_io_num, USB_EXTPHY_VP_IDX, false);
esp_rom_gpio_connect_in_signal(handle->iopins->vm_io_num, USB_EXTPHY_VM_IDX, false);
}
break;
case USB_PHY_ACTION_HOST_FORCE_DISCONN:
if (handle->target == USB_PHY_TARGET_INT) {
/*
We mimic a disconnect by enabling the internal PHY's test mode,
then forcing the output_enable to HIGH. This will cause the received
VP and VM to be zero, thus mimicking a disconnection.
*/
const usb_wrap_test_mode_vals_t vals = {
.tx_enable_n = true,
.tx_dp = false,
.tx_dm = false,
.rx_dp = false,
.rx_dm = false,
.rx_rcv = false,
};
usb_wrap_hal_phy_test_mode_set_signals(&handle->wrap_hal, &vals);
usb_wrap_hal_phy_enable_test_mode(&handle->wrap_hal, true);
} else {
/*
Disable connections on the external PHY by connecting the VP and VM signals to the constant LOW signal.
*/
esp_rom_gpio_connect_in_signal(GPIO_MATRIX_CONST_ZERO_INPUT, USB_EXTPHY_VP_IDX, false);
esp_rom_gpio_connect_in_signal(GPIO_MATRIX_CONST_ZERO_INPUT, USB_EXTPHY_VM_IDX, false);
}
break;
default:
break;
}
return ret;
}
static esp_err_t usb_phy_install(void)
{
portENTER_CRITICAL(&phy_spinlock);
if (p_phy_ctrl_obj) {
// p_phy_ctrl_obj already installed, return immediately
portEXIT_CRITICAL(&phy_spinlock);
return ESP_OK;
}
portEXIT_CRITICAL(&phy_spinlock);
esp_err_t ret = ESP_OK;
phy_ctrl_obj_t *phy_ctrl_obj = (phy_ctrl_obj_t *) calloc(1, sizeof(phy_ctrl_obj_t));
ESP_GOTO_ON_FALSE(phy_ctrl_obj, ESP_ERR_NO_MEM, cleanup, USBPHY_TAG, "no mem for USB_PHY driver");
portENTER_CRITICAL(&phy_spinlock);
if (!p_phy_ctrl_obj) {
p_phy_ctrl_obj = phy_ctrl_obj;
p_phy_ctrl_obj->ref_count = 0;
} else {
// p_phy_ctrl_obj already installed, need to free resource
portEXIT_CRITICAL(&phy_spinlock);
goto cleanup;
}
// Enable USB peripheral and reset the register
portEXIT_CRITICAL(&phy_spinlock);
USB_WRAP_RCC_ATOMIC() {
usb_wrap_ll_enable_bus_clock(true);
usb_wrap_ll_reset_register();
}
return ESP_OK;
cleanup:
free(phy_ctrl_obj);
return ret;
}
esp_err_t usb_new_phy(const usb_phy_config_t *config, usb_phy_handle_t *handle_ret)
{
ESP_RETURN_ON_FALSE(config, ESP_ERR_INVALID_ARG, USBPHY_TAG, "config argument is invalid");
ESP_RETURN_ON_FALSE(config->target < USB_PHY_TARGET_MAX, ESP_ERR_INVALID_ARG, USBPHY_TAG, "specified PHY argument is invalid");
ESP_RETURN_ON_FALSE(config->controller < USB_PHY_CTRL_MAX, ESP_ERR_INVALID_ARG, USBPHY_TAG, "specified source argument is invalid");
ESP_RETURN_ON_ERROR(usb_phy_install(), USBPHY_TAG, "usb_phy driver installation failed");
esp_err_t ret = ESP_OK;
bool new_phy = false;
phy_context_t *phy_context = (phy_context_t *) calloc(1, sizeof(phy_context_t));
ESP_GOTO_ON_FALSE(phy_context, ESP_ERR_NO_MEM, cleanup, USBPHY_TAG, "no mem for phy context");
portENTER_CRITICAL(&phy_spinlock);
usb_phy_get_phy_status(config->target, &phy_context->status);
if (phy_context->status == USB_PHY_STATUS_FREE) {
new_phy = true;
p_phy_ctrl_obj->ref_count++;
if (config->target == USB_PHY_TARGET_EXT) {
p_phy_ctrl_obj->external_phy = phy_context;
} else {
p_phy_ctrl_obj->internal_phy = phy_context;
}
}
portEXIT_CRITICAL(&phy_spinlock);
ESP_GOTO_ON_FALSE(new_phy, ESP_ERR_INVALID_STATE, cleanup, USBPHY_TAG, "selected PHY is in use");
phy_context->target = config->target;
phy_context->controller = config->controller;
phy_context->status = USB_PHY_STATUS_IN_USE;
usb_wrap_hal_init(&phy_context->wrap_hal);
#if SOC_USB_SERIAL_JTAG_SUPPORTED
usb_serial_jtag_hal_init(&phy_context->usj_hal);
#endif
if (config->controller == USB_PHY_CTRL_OTG) {
#if USB_WRAP_LL_EXT_PHY_SUPPORTED
usb_wrap_hal_phy_set_external(&phy_context->wrap_hal, (config->target == USB_PHY_TARGET_EXT));
#endif
}
#if SOC_USB_SERIAL_JTAG_SUPPORTED
else if (config->controller == USB_PHY_CTRL_SERIAL_JTAG) {
usb_serial_jtag_hal_phy_set_external(&phy_context->usj_hal, (config->target == USB_PHY_TARGET_EXT));
phy_context->otg_mode = USB_OTG_MODE_DEVICE;
phy_context->otg_speed = USB_PHY_SPEED_FULL;
}
#endif
if (config->target == USB_PHY_TARGET_INT) {
gpio_set_drive_capability(USBPHY_DM_NUM, GPIO_DRIVE_CAP_3);
gpio_set_drive_capability(USBPHY_DP_NUM, GPIO_DRIVE_CAP_3);
}
*handle_ret = (usb_phy_handle_t) phy_context;
if (config->ext_io_conf && config->target == USB_PHY_TARGET_EXT) {
phy_context->iopins = (usb_phy_ext_io_conf_t *) calloc(1, sizeof(usb_phy_ext_io_conf_t));
ESP_GOTO_ON_FALSE(phy_context->iopins, ESP_ERR_NO_MEM, cleanup, USBPHY_TAG, "no mem for storing I/O pins");
memcpy(phy_context->iopins, config->ext_io_conf, sizeof(usb_phy_ext_io_conf_t));
ESP_ERROR_CHECK(phy_external_iopins_configure(phy_context->iopins));
}
if (config->otg_mode != USB_PHY_MODE_DEFAULT) {
ESP_ERROR_CHECK(usb_phy_otg_set_mode(*handle_ret, config->otg_mode));
}
if (config->otg_speed != USB_PHY_SPEED_UNDEFINED) {
ESP_ERROR_CHECK(usb_phy_otg_dev_set_speed(*handle_ret, config->otg_speed));
}
if (config->otg_io_conf && (phy_context->controller == USB_PHY_CTRL_OTG)) {
ESP_ERROR_CHECK(phy_otg_iopins_configure(config->otg_io_conf));
}
return ESP_OK;
cleanup:
free(phy_context->iopins);
free(phy_context);
if (p_phy_ctrl_obj->ref_count == 0) {
free(p_phy_ctrl_obj);
p_phy_ctrl_obj = NULL;
}
return ret;
}
static void phy_uninstall(void)
{
phy_ctrl_obj_t *p_phy_ctrl_obj_free = NULL;
portENTER_CRITICAL(&phy_spinlock);
if (p_phy_ctrl_obj->ref_count == 0) {
p_phy_ctrl_obj_free = p_phy_ctrl_obj;
p_phy_ctrl_obj = NULL;
USB_WRAP_RCC_ATOMIC() {
// Disable USB peripheral without reset the module
usb_wrap_ll_enable_bus_clock(false);
}
}
portEXIT_CRITICAL(&phy_spinlock);
free(p_phy_ctrl_obj_free);
}
esp_err_t usb_del_phy(usb_phy_handle_t handle)
{
ESP_RETURN_ON_FALSE(handle, ESP_ERR_INVALID_ARG, USBPHY_TAG, "handle argument is invalid");
portENTER_CRITICAL(&phy_spinlock);
p_phy_ctrl_obj->ref_count--;
if (handle->target == USB_PHY_TARGET_EXT) {
p_phy_ctrl_obj->external_phy = NULL;
} else {
// Clear pullup and pulldown loads on D+ / D-, and disable the pads
usb_wrap_hal_phy_disable_pull_override(&handle->wrap_hal);
p_phy_ctrl_obj->internal_phy = NULL;
}
portEXIT_CRITICAL(&phy_spinlock);
free(handle->iopins);
free(handle);
phy_uninstall();
return ESP_OK;
}
esp_err_t usb_phy_get_phy_status(usb_phy_target_t target, usb_phy_status_t *status)
{
ESP_RETURN_ON_FALSE(target < USB_PHY_TARGET_MAX, ESP_ERR_INVALID_ARG, USBPHY_TAG, "argument is invalid");
ESP_RETURN_ON_FALSE(p_phy_ctrl_obj, ESP_ERR_INVALID_STATE, USBPHY_TAG, USBPHY_NOT_INIT_ERR_STR);
if (target == USB_PHY_TARGET_EXT && p_phy_ctrl_obj->external_phy) {
*status = p_phy_ctrl_obj->external_phy->status;
} else if (target == USB_PHY_TARGET_INT && p_phy_ctrl_obj->internal_phy) {
*status = p_phy_ctrl_obj->internal_phy->status;
} else {
*status = USB_PHY_STATUS_FREE;
}
return ESP_OK;
}
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