1 files changed, 0 insertions, 115 deletions
diff --git a/chip/stm32/usart_rx_dma.h b/chip/stm32/usart_rx_dma.h
deleted file mode 100644
index 064ab8046c..0000000000
--- a/chip/stm32/usart_rx_dma.h
+++ /dev/null
@@ -1,115 +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.
- *
- * Hybrid DMA/Interrupt based USART RX driver for STM32
- */
-#ifndef __CROS_EC_USART_RX_DMA_H
-#define __CROS_EC_USART_RX_DMA_H
-
-#include "producer.h"
-#include "dma.h"
-#include "queue.h"
-#include "usart.h"
-
-/*
- * Only reference the usart_rx_dma_info function if CONFIG_CMD_USART_INFO
- * is defined.  This allows the compiler to remove this function as dead code
- * when CONFIG_CMD_USART_INFO is not defined.
- */
-#ifdef CONFIG_CMD_USART_INFO
-#define USART_RX_DMA_INFO usart_rx_dma_info
-#else
-#define USART_RX_DMA_INFO NULL
-#endif
-
-/*
- * Construct a USART RX instance for DMA using the given DMA channel.
- *
- * This macro creates a new usart_rx_dma struct, complete with in RAM state,
- * the contained usart_rx struct can be used in initializing a usart_config
- * struct.
- *
- * CHANNEL is the DMA channel to be used for reception.  This must be a valid
- * DMA channel for the USART peripheral and any alternate channel mappings must
- * be handled by the board specific code.
- *
- * FIFO_SIZE is the number of bytes (which does not need to be a power of two)
- * to use for the DMA circular buffer.  This buffer must be large enough to
- * hide the worst case interrupt latency the system will encounter.  The DMA
- * RX driver adds to the output of the usart_info command a high water mark
- * of how many bytes were transferred out of this FIFO on any one interrupt.
- * This value can be used to correctly size the FIFO by setting the FIFO_SIZE
- * to something large, stress test the USART, and run usart_info.  After a
- * reasonable stress test the "DMA RX max_bytes" value will be a reasonable
- * size for the FIFO (perhaps +10% for safety).
- */
-#define USART_RX_DMA(CHANNEL, FIFO_SIZE)				\
-	((struct usart_rx_dma const) {					\
-		.usart_rx = {						\
-			.producer_ops = {				\
-				.read = NULL,				\
-			},						\
-									\
-			.init      = usart_rx_dma_init,			\
-			.interrupt = usart_rx_dma_interrupt,		\
-			.info      = USART_RX_DMA_INFO,			\
-		},							\
-									\
-		.state       = &((struct usart_rx_dma_state) {}),	\
-		 .fifo_buffer = ((uint8_t[FIFO_SIZE]) {}),		\
-		 .fifo_size   = FIFO_SIZE,				\
-		 .channel     = CHANNEL,				\
-	})
-
-/*
- * In RAM state required to manage DMA based transmission.
- */
-struct usart_rx_dma_state {
-	/*
-	 * Previous value of dma_bytes_done.  This will wrap when the DMA fills
-	 * the queue.
-	 */
-	size_t index;
-
-	/*
-	 * Maximum number of bytes transferred in any one RX interrupt.
-	 */
-	uint32_t max_bytes;
-};
-
-/*
- * Extension of the usart_rx struct to include required configuration for
- * DMA based transmission.
- */
-struct usart_rx_dma {
-	struct usart_rx usart_rx;
-
-	struct usart_rx_dma_state volatile *state;
-
-	uint8_t *fifo_buffer;
-	size_t  fifo_size;
-
-	enum dma_channel channel;
-};
-
-/*
- * Function pointers needed to initialize a usart_rx struct.  These shouldn't
- * be called in any other context as they assume that the producer or config
- * that they are passed was initialized with a complete usart_rx_dma struct.
- */
-void usart_rx_dma_init(struct usart_config const *config);
-void usart_rx_dma_interrupt(struct usart_config const *config);
-
-/*
- * Function pointers needed to initialize host command rx dma interrupt.
- * This should be only called from usart host command layer.
- */
-void usart_host_command_rx_dma_interrupt(struct usart_config const *config);
-
-/*
- * Debug function, used to print DMA RX statistics to the console.
- */
-void usart_rx_dma_info(struct usart_config const *config);
-
-#endif /* __CROS_EC_USART_RX_DMA_H */