Commit a033a74e authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Vinod Koul
Browse files

dmaengine: remove coh901318 driver 



The ST-Ericsson U300 platform is getting removed, so this driver is no
longer needed.

Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210120131859.2056308-4-arnd@kernel.org


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 1c8963f8

Documentation/devicetree/bindings/dma/ste-coh901318.txt

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ST-Ericsson COH 901 318 DMA Controller



This is a DMA controller which has begun as a fork of the

ARM PL08x PrimeCell VHDL code.



Required properties:

- compatible: should be "stericsson,coh901318"

- reg: register locations and length

- interrupts: the single DMA IRQ

- #dma-cells: must be set to <1>, as the channels on the

  COH 901 318 are simple and identified by a single number

- dma-channels: the number of DMA channels handled



Example:



dmac: dma-controller@c00020000 {

	compatible = "stericsson,coh901318";

	reg = <0xc0020000 0x1000>;

	interrupt-parent = <&vica>;

	interrupts = <2>;

	#dma-cells = <1>;

	dma-channels = <40>;

};



Consumers example:



uart0: serial@c0013000 {

	compatible = "...";

	(...)

	dmas = <&dmac 17 &dmac 18>;

	dma-names = "tx", "rx";

};

drivers/dma/Kconfig

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@@ -124,13 +124,6 @@ config BCM_SBA_RAID 
	  has the capability to offload memcpy, xor and pq computation

	  for raid5/6.



config COH901318

	bool "ST-Ericsson COH901318 DMA support"

	select DMA_ENGINE

	depends on ARCH_U300 || COMPILE_TEST

	help

	  Enable support for ST-Ericsson COH 901 318 DMA.



config DMA_BCM2835

	tristate "BCM2835 DMA engine support"

	depends on ARCH_BCM2835

drivers/dma/Makefile

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@@ -20,7 +20,6 @@ obj-$(CONFIG_AT_HDMAC) += at_hdmac.o 
obj-$(CONFIG_AT_XDMAC) += at_xdmac.o

obj-$(CONFIG_AXI_DMAC) += dma-axi-dmac.o

obj-$(CONFIG_BCM_SBA_RAID) += bcm-sba-raid.o

obj-$(CONFIG_COH901318) += coh901318.o coh901318_lli.o

obj-$(CONFIG_DMA_BCM2835) += bcm2835-dma.o

obj-$(CONFIG_DMA_JZ4780) += dma-jz4780.o

obj-$(CONFIG_DMA_SA11X0) += sa11x0-dma.o

drivers/dma/coh901318.c

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File deleted.

Preview size limit exceeded, changes collapsed.

drivers/dma/coh901318.h

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/* SPDX-License-Identifier: GPL-2.0-only */

/*

 * Copyright (C) 2007-2013 ST-Ericsson

 * DMA driver for COH 901 318

 * Author: Per Friden <per.friden@stericsson.com>

 */



#ifndef COH901318_H

#define COH901318_H



#define MAX_DMA_PACKET_SIZE_SHIFT 11

#define MAX_DMA_PACKET_SIZE (1 << MAX_DMA_PACKET_SIZE_SHIFT)



struct device;



struct coh901318_pool {

	spinlock_t lock;

	struct dma_pool *dmapool;

	struct device *dev;



#ifdef CONFIG_DEBUG_FS

	int debugfs_pool_counter;

#endif

};



/**

 * struct coh901318_lli - linked list item for DMAC

 * @control: control settings for DMAC

 * @src_addr: transfer source address

 * @dst_addr: transfer destination address

 * @link_addr:  physical address to next lli

 * @virt_link_addr: virtual address of next lli (only used by pool_free)

 * @phy_this: physical address of current lli (only used by pool_free)

 */

struct coh901318_lli {

	u32 control;

	dma_addr_t src_addr;

	dma_addr_t dst_addr;

	dma_addr_t link_addr;



	void *virt_link_addr;

	dma_addr_t phy_this;

};



/**

 * coh901318_pool_create() - Creates an dma pool for lli:s

 * @pool: pool handle

 * @dev: dma device

 * @lli_nbr: number of lli:s in the pool

 * @algin: address alignemtn of lli:s

 * returns 0 on success otherwise none zero

 */

int coh901318_pool_create(struct coh901318_pool *pool,

			  struct device *dev,

			  size_t lli_nbr, size_t align);



/**

 * coh901318_pool_destroy() - Destroys the dma pool

 * @pool: pool handle

 * returns 0 on success otherwise none zero

 */

int coh901318_pool_destroy(struct coh901318_pool *pool);



/**

 * coh901318_lli_alloc() - Allocates a linked list

 *

 * @pool: pool handle

 * @len: length to list

 * return: none NULL if success otherwise NULL

 */

struct coh901318_lli *

coh901318_lli_alloc(struct coh901318_pool *pool,

		    unsigned int len);



/**

 * coh901318_lli_free() - Returns the linked list items to the pool

 * @pool: pool handle

 * @lli: reference to lli pointer to be freed

 */

void coh901318_lli_free(struct coh901318_pool *pool,

			struct coh901318_lli **lli);



/**

 * coh901318_lli_fill_memcpy() - Prepares the lli:s for dma memcpy

 * @pool: pool handle

 * @lli: allocated lli

 * @src: src address

 * @size: transfer size

 * @dst: destination address

 * @ctrl_chained: ctrl for chained lli

 * @ctrl_last: ctrl for the last lli

 * returns number of CPU interrupts for the lli, negative on error.

 */

int

coh901318_lli_fill_memcpy(struct coh901318_pool *pool,

			  struct coh901318_lli *lli,

			  dma_addr_t src, unsigned int size,

			  dma_addr_t dst, u32 ctrl_chained, u32 ctrl_last);



/**

 * coh901318_lli_fill_single() - Prepares the lli:s for dma single transfer

 * @pool: pool handle

 * @lli: allocated lli

 * @buf: transfer buffer

 * @size: transfer size

 * @dev_addr: address of periphal

 * @ctrl_chained: ctrl for chained lli

 * @ctrl_last: ctrl for the last lli

 * @dir: direction of transfer (to or from device)

 * returns number of CPU interrupts for the lli, negative on error.

 */

int

coh901318_lli_fill_single(struct coh901318_pool *pool,

			  struct coh901318_lli *lli,

			  dma_addr_t buf, unsigned int size,

			  dma_addr_t dev_addr, u32 ctrl_chained, u32 ctrl_last,

			  enum dma_transfer_direction dir);



/**

 * coh901318_lli_fill_single() - Prepares the lli:s for dma scatter list transfer

 * @pool: pool handle

 * @lli: allocated lli

 * @sg: scatter gather list

 * @nents: number of entries in sg

 * @dev_addr: address of periphal

 * @ctrl_chained: ctrl for chained lli

 * @ctrl: ctrl of middle lli

 * @ctrl_last: ctrl for the last lli

 * @dir: direction of transfer (to or from device)

 * @ctrl_irq_mask: ctrl mask for CPU interrupt

 * returns number of CPU interrupts for the lli, negative on error.

 */

int

coh901318_lli_fill_sg(struct coh901318_pool *pool,

		      struct coh901318_lli *lli,

		      struct scatterlist *sg, unsigned int nents,

		      dma_addr_t dev_addr, u32 ctrl_chained,

		      u32 ctrl, u32 ctrl_last,

		      enum dma_transfer_direction dir, u32 ctrl_irq_mask);



#endif /* COH901318_H */