ethernet: stm32: add a alternative HAL_ETH_Init for V1 api

add a alternative HAL_ETH_Init for V1 api without phy
configuration, as this is already been done outside of
the ethernet driver.

Signed-off-by: Fin Maaß <[email protected]>

Author: maass-hamburg

drivers/ethernet/eth_stm32_hal.c

@@ -877,6 +877,75 @@ static void RISAF_Config(void)
 }
 #endif
 
+#if defined(CONFIG_ETH_STM32_HAL_API_V1)
+#define ETH_TIMEOUT_SWRESET 500U
+
+HAL_StatusTypeDef HAL_ETH_Init_alt(ETH_HandleTypeDef *heth)
+{
+	uint32_t tmpreg1 = 0U;
+	uint32_t tickstart = 0U;
+
+	/* Check the ETH peripheral state */
+	if (heth == NULL) {
+		return HAL_ERROR;
+	}
+
+	if (heth->State == HAL_ETH_STATE_RESET) {
+		/* Allocate lock resource and initialize it */
+		heth->Lock = HAL_UNLOCKED;
+	}
+
+	/* Select MII or RMII Mode*/
+#ifdef SOC_SERIES_STM32F1X
+	AFIO->MAPR &= ~(AFIO_MAPR_MII_RMII_SEL);
+	AFIO->MAPR |= (uint32_t)heth->Init.MediaInterface;
+#else
+	/* Enable SYSCFG Clock */
+	__HAL_RCC_SYSCFG_CLK_ENABLE();
+
+	/* Select MII or RMII Mode*/
+	SYSCFG->PMC &= ~(SYSCFG_PMC_MII_RMII_SEL);
+	SYSCFG->PMC |= (uint32_t)heth->Init.MediaInterface;
+#endif /* SOC_SERIES_STM32F1X */
+
+	/* Get the ETHERNET MACMIIAR value, this is responsible for mdio, so save it to restore it
+	 * later
+	 */
+	tmpreg1 = (heth->Instance)->MACMIIAR;
+
+	/* Ethernet Software reset */
+	/* Set the SWR bit: resets all MAC subsystem internal registers and logic */
+	/* After reset all the registers holds their respective reset values */
+	(heth->Instance)->DMABMR |= ETH_DMABMR_SR;
+
+	/* Get tick */
+	tickstart = k_uptime_get_32();
+
+	/* Wait for software reset */
+	while (((heth->Instance)->DMABMR & ETH_DMABMR_SR) != (uint32_t)RESET) {
+		/* Check for the Timeout */
+		if ((k_uptime_get_32() - tickstart) > ETH_TIMEOUT_SWRESET) {
+			heth->State = HAL_ETH_STATE_TIMEOUT;
+
+			/* Process Unlocked */
+			__HAL_UNLOCK(heth);
+
+			return HAL_TIMEOUT;
+		}
+	}
+
+	(heth->Instance)->MACMIIAR = (uint32_t)tmpreg1;
+
+	/* Config MAC and DMA */
+	ETH_MACDMAConfig(heth, ETH_SUCCESS);
+
+	/* Set ETH HAL State to Ready */
+	heth->State = HAL_ETH_STATE_READY;
+
+	return HAL_OK;
+}
+#endif /* CONFIG_ETH_STM32_HAL_API_V1 */
+
 static int eth_initialize(const struct device *dev)
 {
 	struct eth_stm32_hal_dev_data *dev_data;
@@ -948,7 +1017,7 @@ static int eth_initialize(const struct device *dev)
 			PHY_LINK_IS_SPEED_100M(state.speed) ? ETH_SPEED_100M : ETH_SPEED_10M;
 	}
 
-	hal_ret = HAL_ETH_Init(heth);
+	hal_ret = HAL_ETH_Init_alt(heth);
 	if (hal_ret == HAL_TIMEOUT) {
 		/* HAL Init time out. This could be linked to */
 		/* a recoverable error. Log the issue and continue */