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https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
124 lines
3.4 KiB
C
124 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Enhanced Direct Memory Access (EDMA3) Controller
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*
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* (C) Copyright 2014
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* Texas Instruments Incorporated, <www.ti.com>
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*/
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#ifndef _EDMA3_H_
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#define _EDMA3_H_
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#include <linux/stddef.h>
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#define EDMA3_PARSET_NULL_LINK 0xffff
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/*
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* All parameter RAM set options
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* opt field in edma3_param_set_config structure
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*/
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#define EDMA3_SLOPT_PRIV_LEVEL BIT(31)
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#define EDMA3_SLOPT_PRIV_ID(id) ((0xf & (id)) << 24)
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#define EDMA3_SLOPT_INTERM_COMP_CHAIN_ENB BIT(23)
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#define EDMA3_SLOPT_TRANS_COMP_CHAIN_ENB BIT(22)
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#define EDMA3_SLOPT_INTERM_COMP_INT_ENB BIT(21)
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#define EDMA3_SLOPT_TRANS_COMP_INT_ENB BIT(20)
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#define EDMA3_SLOPT_COMP_CODE(code) ((0x3f & (code)) << 12)
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#define EDMA3_SLOPT_FIFO_WIDTH_8 0
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#define EDMA3_SLOPT_FIFO_WIDTH_16 (1 << 8)
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#define EDMA3_SLOPT_FIFO_WIDTH_32 (2 << 8)
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#define EDMA3_SLOPT_FIFO_WIDTH_64 (3 << 8)
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#define EDMA3_SLOPT_FIFO_WIDTH_128 (4 << 8)
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#define EDMA3_SLOPT_FIFO_WIDTH_256 (5 << 8)
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#define EDMA3_SLOPT_FIFO_WIDTH_SET(w) ((w & 0x7) << 8)
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#define EDMA3_SLOPT_STATIC BIT(3)
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#define EDMA3_SLOPT_AB_SYNC BIT(2)
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#define EDMA3_SLOPT_DST_ADDR_CONST_MODE BIT(1)
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#define EDMA3_SLOPT_SRC_ADDR_CONST_MODE BIT(0)
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enum edma3_address_mode {
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INCR = 0,
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FIFO = 1
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};
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enum edma3_fifo_width {
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W8BIT = 0,
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W16BIT = 1,
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W32BIT = 2,
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W64BIT = 3,
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W128BIT = 4,
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W256BIT = 5
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};
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enum edma3_sync_dimension {
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ASYNC = 0,
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ABSYNC = 1
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};
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/* PaRAM slots are laid out like this */
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struct edma3_slot_layout {
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u32 opt;
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u32 src;
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u32 a_b_cnt;
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u32 dst;
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u32 src_dst_bidx;
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u32 link_bcntrld;
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u32 src_dst_cidx;
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u32 ccnt;
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} __packed;
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/*
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* Use this to assign trigger word number of edma3_slot_layout struct.
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* trigger_word_name - is the exact name from edma3_slot_layout.
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*/
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#define EDMA3_TWORD(trigger_word_name)\
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(offsetof(struct edma3_slot_layout, trigger_word_name) / 4)
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struct edma3_slot_config {
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u32 opt;
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u32 src;
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u32 dst;
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int bcnt;
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int acnt;
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int ccnt;
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int src_bidx;
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int dst_bidx;
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int src_cidx;
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int dst_cidx;
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int bcntrld;
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int link;
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};
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struct edma3_channel_config {
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int slot;
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int chnum;
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int complete_code; /* indicate pending complete interrupt */
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int trigger_slot_word; /* only used for qedma */
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};
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void qedma3_start(u32 base, struct edma3_channel_config *cfg);
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void qedma3_stop(u32 base, struct edma3_channel_config *cfg);
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void edma3_slot_configure(u32 base, int slot, struct edma3_slot_config *cfg);
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int edma3_check_for_transfer(u32 base, struct edma3_channel_config *cfg);
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void edma3_write_slot(u32 base, int slot, struct edma3_slot_layout *param);
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void edma3_read_slot(u32 base, int slot, struct edma3_slot_layout *param);
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void edma3_set_dest(u32 base, int slot, u32 dst, enum edma3_address_mode mode,
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enum edma3_fifo_width width);
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void edma3_set_dest_index(u32 base, unsigned slot, int bidx, int cidx);
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void edma3_set_dest_addr(u32 base, int slot, u32 dst);
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void edma3_set_src(u32 base, int slot, u32 src, enum edma3_address_mode mode,
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enum edma3_fifo_width width);
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void edma3_set_src_index(u32 base, unsigned slot, int bidx, int cidx);
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void edma3_set_src_addr(u32 base, int slot, u32 src);
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void edma3_set_transfer_params(u32 base, int slot, int acnt,
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int bcnt, int ccnt, u16 bcnt_rld,
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enum edma3_sync_dimension sync_mode);
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void edma3_transfer(unsigned long edma3_base_addr, unsigned int
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edma_slot_num, void *dst, void *src, size_t len);
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void edma3_fill(unsigned long edma3_base_addr, unsigned int edma_slot_num,
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void *dst, u8 val, size_t len);
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#endif
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