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drivers/cdcacm/serial: add release interface to release uart_dev resource

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Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
This commit is contained in:
dongjiuzhu1
2024-04-21 23:21:54 +08:00
committed by Xiang Xiao
parent 5af805b2ef
commit 9c55f21a6f
5 changed files with 106 additions and 10 deletions
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drivers/usbdev/cdcacm.c
+25 -1
View File
@@ -222,6 +222,7 @@ static bool cdcuart_rxflowcontrol(FAR struct uart_dev_s *dev,
#endif
static void cdcuart_txint(FAR struct uart_dev_s *dev, bool enable);
static bool cdcuart_txempty(FAR struct uart_dev_s *dev);
static int cdcuart_release(FAR struct uart_dev_s *dev);
/****************************************************************************
* Private Data
@@ -272,7 +273,8 @@ static const struct uart_ops_s g_uartops =
NULL, /* send */
cdcuart_txint, /* txinit */
NULL, /* txready */
cdcuart_txempty /* txempty */
cdcuart_txempty, /* txempty */
cdcuart_release /* release */
};
/****************************************************************************
@@ -2800,6 +2802,28 @@ static bool cdcuart_txempty(FAR struct uart_dev_s *dev)
return priv->nwrq >= CONFIG_CDCACM_NWRREQS;
}
/****************************************************************************
* Name: cdcuart_release
*
* Description:
* This is called to release some resource about the device when device
* was close and unregistered.
*
****************************************************************************/
static int cdcuart_release(FAR struct uart_dev_s *dev)
{
FAR struct cdcacm_dev_s *priv = (FAR struct cdcacm_dev_s *)dev->priv;
usbtrace(CDCACM_CLASSAPI_RELEASE, 0);
/* And free the memory resources. */
wd_cancel(&priv->rxfailsafe);
kmm_free(priv);
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
drivers/usbdev/cdcacm.h
+1
View File
@@ -181,6 +181,7 @@
#define CDCACM_CLASSAPI_TXREADY TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_TXREADY)
#define CDCACM_CLASSAPI_TXEMPTY TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_TXEMPTY)
#define CDCACM_CLASSAPI_FLOWCONTROL TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_FLOWCONTROL)
#define CDCACM_CLASSAPI_RELEASE TRACE_EVENT(TRACE_CLASSAPI_ID, USBSER_TRACECLASSAPI_RELEASE)
/****************************************************************************
* Public Types