1 files changed, 0 insertions, 119 deletions
diff --git a/chip/stm32/usart_rx_dma.c b/chip/stm32/usart_rx_dma.c
deleted file mode 100644
index a185878261..0000000000
--- a/chip/stm32/usart_rx_dma.c
+++ /dev/null
@@ -1,119 +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.
- */
-
-#include "usart_rx_dma.h"
-
-#include "atomic.h"
-#include "common.h"
-#include "console.h"
-#include "registers.h"
-#include "system.h"
-#include "usart_host_command.h"
-#include "util.h"
-
-typedef size_t (*add_data_t)(struct usart_config const *config,
-	const uint8_t *src, size_t count);
-
-void usart_rx_dma_init(struct usart_config const *config)
-{
-	struct usart_rx_dma const *dma_config =
-		DOWNCAST(config->rx, struct usart_rx_dma const, usart_rx);
-
-	intptr_t base = config->hw->base;
-
-	struct dma_option options = {
-		.channel = dma_config->channel,
-		.periph  = (void *)&STM32_USART_RDR(base),
-		.flags   = (STM32_DMA_CCR_MSIZE_8_BIT |
-			    STM32_DMA_CCR_PSIZE_8_BIT |
-			    STM32_DMA_CCR_CIRC),
-	};
-
-	if (IS_ENABLED(CHIP_FAMILY_STM32F4))
-		options.flags |= STM32_DMA_CCR_CHANNEL(STM32_REQ_USART1_RX);
-
-	STM32_USART_CR1(base) |= STM32_USART_CR1_RXNEIE;
-	STM32_USART_CR1(base) |= STM32_USART_CR1_RE;
-	STM32_USART_CR3(base) |= STM32_USART_CR3_DMAR;
-
-	dma_config->state->index     = 0;
-	dma_config->state->max_bytes = 0;
-
-	dma_start_rx(&options, dma_config->fifo_size, dma_config->fifo_buffer);
-}
-
-static void usart_rx_dma_interrupt_common(
-		struct usart_config const *config,
-		add_data_t add_data)
-{
-	struct usart_rx_dma const *dma_config =
-		DOWNCAST(config->rx, struct usart_rx_dma const, usart_rx);
-
-	dma_chan_t *channel  = dma_get_channel(dma_config->channel);
-	size_t     new_index = dma_bytes_done(channel, dma_config->fifo_size);
-	size_t     old_index = dma_config->state->index;
-	size_t     new_bytes = 0;
-	size_t     added     = 0;
-
-	if (new_index > old_index) {
-		new_bytes = new_index - old_index;
-
-		added = add_data(config,
-				dma_config->fifo_buffer + old_index,
-				new_bytes);
-	} else if (new_index < old_index) {
-		/*
-		 * Handle the case where the received bytes are not contiguous
-		 * in the circular DMA buffer.  This is done with two queue
-		 * adds.
-		 */
-		new_bytes = dma_config->fifo_size - (old_index - new_index);
-
-		added = add_data(config,
-				dma_config->fifo_buffer + old_index,
-				dma_config->fifo_size - old_index) +
-			add_data(config,
-				dma_config->fifo_buffer,
-				new_index);
-	} else {
-		/* (new_index == old_index): nothing to add to the queue. */
-	}
-
-	atomic_add((uint32_t *)&(config->state->rx_dropped), new_bytes - added);
-
-	if (dma_config->state->max_bytes < new_bytes)
-		dma_config->state->max_bytes = new_bytes;
-
-	dma_config->state->index = new_index;
-}
-
-static size_t queue_add(struct usart_config const *config,
-			const uint8_t *src, size_t count)
-{
-	return queue_add_units(config->producer.queue, (void *)src, count);
-}
-
-void usart_rx_dma_interrupt(struct usart_config const *config)
-{
-	usart_rx_dma_interrupt_common(config, &queue_add);
-}
-
-
-#if defined(CONFIG_USART_HOST_COMMAND)
-void usart_host_command_rx_dma_interrupt(struct usart_config const *config)
-{
-	usart_rx_dma_interrupt_common(config,
-				      &usart_host_command_rx_append_data);
-}
-#endif /* CONFIG_USART_HOST_COMMAND */
-
-void usart_rx_dma_info(struct usart_config const *config)
-{
-	struct usart_rx_dma const *dma_config =
-		DOWNCAST(config->rx, struct usart_rx_dma const, usart_rx);
-
-	ccprintf("    DMA RX max_bytes %d\n",
-		 atomic_clear((uint32_t *)&dma_config->state->max_bytes));
-}