1 files changed, 0 insertions, 90 deletions
diff --git a/chip/stm32/usart_tx_dma.h b/chip/stm32/usart_tx_dma.h
deleted file mode 100644
index c17164e04a..0000000000
--- a/chip/stm32/usart_tx_dma.h
+++ /dev/null
@@ -1,90 +0,0 @@
-/* Copyright 2015 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- *
- * DMA based USART TX driver for STM32
- */
-#ifndef __CROS_EC_USART_TX_DMA_H
-#define __CROS_EC_USART_TX_DMA_H
-
-#include "consumer.h"
-#include "dma.h"
-#include "queue.h"
-#include "usart.h"
-
-/*
- * Construct a USART TX instance for DMA using the given DMA channel.
- *
- * This macro creates a new usart_tx_dma struct, complete with in RAM state,
- * the contained usart_tx struct can be used in initializing a usart_config
- * struct.
- *
- * CHANNEL is the DMA channel to be used for transmission.  This must be a
- * valid DMA channel for the USART peripheral and any alternate channel
- * mappings must be handled by the board specific code.
- *
- * MAX_BYTES is the maximum size in bytes of a single DMA transfer.  This
- * allows the board to tune how often the TX engine updates the queue state.
- * A larger number here could cause the queue to appear full for longer than
- * required because the queue isn't notified that it has been read from until
- * after the DMA transfer completes.
- */
-#define USART_TX_DMA(CHANNEL, MAX_BYTES)			\
-	((struct usart_tx_dma const) {				\
-		.usart_tx = {					\
-			.consumer_ops = {			\
-				.written = usart_tx_dma_written,\
-			},					\
-								\
-			.init      = usart_tx_dma_init,		\
-			.interrupt = usart_tx_dma_interrupt,	\
-			.info      = NULL,			\
-		},						\
-								\
-		.state     = &((struct usart_tx_dma_state){}),	\
-		.channel   = CHANNEL,				\
-		.max_bytes = MAX_BYTES,				\
-	})
-
-/*
- * In RAM state required to manage DMA based transmission.
- */
-struct usart_tx_dma_state {
-	/*
-	 * The current chunk of queue buffer being used for transmission.  Once
-	 * the transfer is complete, this is used to update the TX queue head
-	 * pointer as well.
-	 */
-	struct queue_chunk chunk;
-
-	/*
-	 * Flag indicating whether a DMA transfer is currently active.
-	 */
-	int dma_active;
-};
-
-/*
- * Extension of the usart_tx struct to include required configuration for
- * DMA based transmission.
- */
-struct usart_tx_dma {
-	struct usart_tx usart_tx;
-
-	struct usart_tx_dma_state volatile *state;
-
-	enum dma_channel channel;
-
-	size_t max_bytes;
-};
-
-/*
- * Function pointers needed to initialize a usart_tx struct.  These shouldn't
- * be called in any other context as they assume that the consumer or config
- * that they are passed was initialized with a complete usart_tx_dma struct.
- */
-void usart_tx_dma_written(struct consumer const *consumer, size_t count);
-void usart_tx_dma_flush(struct consumer const *consumer);
-void usart_tx_dma_init(struct usart_config const *config);
-void usart_tx_dma_interrupt(struct usart_config const *config);
-
-#endif /* __CROS_EC_USART_TX_DMA_H */