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dma: add support for MCUX EDMA

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1. expand PERIPHERAL_TO_PERIPHERAL
2. add slot size to 128 as i.MX-rt has 127 slot
3. add link_channel member in dma_conf which is used to
   support chain channel

Signed-off-by: Hake Huang <hake.huang@oss.nxp.com>
This commit is contained in:
Hake Huang 2020-04-19 13:13:41 +08:00 • committed by Maureen Helm
commit 77c4015082
1 changed files with 21 additions and 14 deletions
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35
include/drivers/dma.h
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@ -31,7 +31,8 @@ extern "C" {
enum dma_channel_direction {
MEMORY_TO_MEMORY = 0x0,
MEMORY_TO_PERIPHERAL,
PERIPHERAL_TO_MEMORY
PERIPHERAL_TO_MEMORY,
PERIPHERAL_TO_PERIPHERAL /*only supported in NXP EDMA*/
};
/** Valid values for @a source_addr_adj and @a dest_addr_adj */
@ -98,25 +99,30 @@ struct dma_block_config {
/**
* @brief DMA configuration structure.
*
* dma_slot [ 0 : 5 ] - which peripheral and direction
* dma_slot [ 0 : 6 ] - which peripheral and direction
* (HW specific)
* channel_direction [ 6 : 8 ] - 000-memory to memory, 001-memory to
* peripheral, 010-peripheral to memory,
* channel_direction [ 7 : 9 ] - 000-memory to memory,
* 001-memory to peripheral,
* 010-peripheral to memory,
* 011-peripheral to peripheral,
* ...
* complete_callback_en [ 9 ] - 0-callback invoked at completion only
* complete_callback_en [ 10 ] - 0-callback invoked at completion only
* 1-callback invoked at completion of
* each block
* error_callback_en [ 10 ] - 0-error callback enabled
* error_callback_en [ 11 ] - 0-error callback enabled
* 1-error callback disabled
* source_handshake [ 11 ] - 0-HW, 1-SW
* dest_handshake [ 12 ] - 0-HW, 1-SW
* channel_priority [ 13 : 16 ] - DMA channel priority
* source_chaining_en [ 17 ] - enable/disable source block chaining
* source_handshake [ 12 ] - 0-HW, 1-SW
* dest_handshake [ 13 ] - 0-HW, 1-SW
* channel_priority [ 14 : 17 ] - DMA channel priority
* source_chaining_en [ 18 ] - enable/disable source block chaining
* 0-disable, 1-enable
* dest_chaining_en [ 18 ] - enable/disable destination block
* dest_chaining_en [ 19 ] - enable/disable destination block
* chaining.
* 0-disable, 1-enable
* reserved [ 19 : 31 ]
* linked_channel [ 20 : 26 ] - after channel count exhaust will
* initiate a channel service request
* at this channel
* reserved [ 27 : 31 ]
*
* source_data_size [ 0 : 15 ] - width of source data (in bytes)
* dest_data_size [ 16 : 31 ] - width of dest data (in bytes)
@ -133,7 +139,7 @@ struct dma_block_config {
* (error_code: zero-transfer success, non zero-error happens).
*/
struct dma_config {
uint32_t dma_slot : 6;
uint32_t dma_slot : 7;
uint32_t channel_direction : 3;
uint32_t complete_callback_en : 1;
uint32_t error_callback_en : 1;
@ -142,7 +148,8 @@ struct dma_config {
uint32_t channel_priority : 4;
uint32_t source_chaining_en : 1;
uint32_t dest_chaining_en : 1;
uint32_t reserved : 13;
uint32_t linked_channel : 7;
uint32_t reserved : 5;
uint32_t source_data_size : 16;
uint32_t dest_data_size : 16;
uint32_t source_burst_length : 16;