write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/drivers/dma/dw/regs.h
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@@ -1,13 +1,10 @@
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+/* SPDX-License-Identifier: GPL-2.0 */
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 /*
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  * Driver for the Synopsys DesignWare AHB DMA Controller
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  *
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  * Copyright (C) 2005-2007 Atmel Corporation
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  * Copyright (C) 2010-2011 ST Microelectronics
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  * Copyright (C) 2016 Intel Corporation
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License version 2 as
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- * published by the Free Software Foundation.
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  */
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9
 
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 #include <linux/bitops.h>
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@@ -128,6 +125,8 @@
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 /* Bitfields in DWC_PARAMS */
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 #define DWC_PARAMS_MBLK_EN	11		/* multi block transfer */
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+#define DWC_PARAMS_HC_LLP	13		/* set LLP register to zero */
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+#define DWC_PARAMS_MSIZE	16		/* max group transaction size */
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 /* bursts size */
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 enum dw_dma_msize {
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@@ -222,6 +221,16 @@
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 /* iDMA 32-bit support */
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+/* bursts size */
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+enum idma32_msize {
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+	IDMA32_MSIZE_1,
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+	IDMA32_MSIZE_2,
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+	IDMA32_MSIZE_4,
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+	IDMA32_MSIZE_8,
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+	IDMA32_MSIZE_16,
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+	IDMA32_MSIZE_32,
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+};
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+
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 /* Bitfields in CTL_HI */
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 #define IDMA32C_CTLH_BLOCK_TS_MASK	GENMASK(16, 0)
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 #define IDMA32C_CTLH_BLOCK_TS(x)	((x) & IDMA32C_CTLH_BLOCK_TS_MASK)
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@@ -276,6 +285,7 @@
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 	/* hardware configuration */
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 	unsigned int		block_size;
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 	bool			nollp;
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+	u32			max_burst;
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 	/* custom slave configuration */
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 	struct dw_dma_slave	dws;
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@@ -312,6 +322,21 @@
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 	u8			all_chan_mask;
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 	u8			in_use;
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+	/* Channel operations */
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+	void	(*initialize_chan)(struct dw_dma_chan *dwc);
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+	void	(*suspend_chan)(struct dw_dma_chan *dwc, bool drain);
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+	void	(*resume_chan)(struct dw_dma_chan *dwc, bool drain);
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+	u32	(*prepare_ctllo)(struct dw_dma_chan *dwc);
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+	void	(*encode_maxburst)(struct dw_dma_chan *dwc, u32 *maxburst);
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+	u32	(*bytes2block)(struct dw_dma_chan *dwc, size_t bytes,
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+			       unsigned int width, size_t *len);
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+	size_t	(*block2bytes)(struct dw_dma_chan *dwc, u32 block, u32 width);
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+
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+	/* Device operations */
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+	void (*set_device_name)(struct dw_dma *dw, int id);
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+	void (*disable)(struct dw_dma *dw);
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+	void (*enable)(struct dw_dma *dw);
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+
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 	/* platform data */
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 	struct dw_dma_platform_data	*pdata;
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 };