upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
101 lines
3.3 KiB
101 lines
3.3 KiB
23 years ago
|
#ifndef DMA_EXPORT_H
|
||
|
|
#define DMA_EXPORT_H
|
||
|
|
|
||
|
|
/****************************************************
|
||
|
|
* $Id:
|
||
|
|
*
|
||
|
|
* Copyright Motorola 1999
|
||
|
|
*
|
||
|
|
* $Log:
|
||
|
|
*
|
||
|
|
****************************************************/
|
||
|
|
|
||
|
|
/* These are the defined return values for the DMA_* functions.
|
||
|
|
* Any non-zero value indicates failure. Failure modes can be added for
|
||
|
|
* more detailed error reporting.
|
||
|
|
*/
|
||
|
|
typedef enum _dma_status
|
||
|
|
{
|
||
|
|
DMA_SUCCESS = 0,
|
||
|
|
DMA_ERROR,
|
||
|
|
} DMA_Status;
|
||
|
|
|
||
|
|
/* These are the defined channel transfer types. */
|
||
|
|
typedef enum _dma_transfer_types
|
||
|
|
{
|
||
|
|
DMA_M2M = 0, /* local memory to local memory */
|
||
|
|
DMA_M2P = 1, /* local memory to PCI */
|
||
|
|
DMA_P2M = 2, /* PCI to local memory */
|
||
|
|
DMA_P2P = 3, /* PCI to PCI */
|
||
|
|
} DMA_TRANSFER_TYPE;
|
||
|
|
|
||
|
|
typedef enum _dma_interrupt_steer
|
||
|
|
{
|
||
|
|
DMA_INT_STEER_LOCAL = 0, /* steer DMA int to local processor */
|
||
|
|
DMA_INT_STEER_PCI = 1, /* steer DMA int to PCI bus through INTA_ */
|
||
|
|
} DMA_INTERRUPT_STEER;
|
||
|
|
|
||
|
|
typedef enum _dma_channel
|
||
|
|
{
|
||
|
|
DMA_CHN_0 = 0, /* kahlua has two dma channels: 0 and 1 */
|
||
|
|
DMA_CHN_1 = 1,
|
||
|
|
} DMA_CHANNEL;
|
||
|
|
|
||
|
|
typedef enum _dma_snoop_mode
|
||
|
|
{
|
||
|
|
DMA_SNOOP_DISABLE = 0,
|
||
|
|
DMA_SNOOP_ENABLE = 1,
|
||
|
|
} DMA_SNOOP_MODE;
|
||
|
|
|
||
|
|
/******************** App. API ********************
|
||
|
|
* The application API is for user level application
|
||
|
|
* to use the functionality provided by DMA driver.
|
||
|
|
* This is a "generic" DMA interface, it should contain
|
||
|
|
* nothing specific to the Kahlua implementation.
|
||
|
|
* Only the generic functions are exported by the library.
|
||
|
|
*
|
||
|
|
* Note: Its App.s responsibility to swap the data
|
||
|
|
* byte. In our API, we currently transfer whatever
|
||
|
|
* we are given - Big/Little Endian. This could
|
||
|
|
* become part of the DMA config, though.
|
||
|
|
**************************************************/
|
||
|
|
|
||
|
|
|
||
|
|
/* Initialize DMA unit with the following:
|
||
|
|
* optional pointer to application layer print function
|
||
|
|
*
|
||
|
|
* These parameters may be added:
|
||
|
|
* ???
|
||
|
|
* Interrupt enables, modes, etc. are set for each transfer.
|
||
|
|
*
|
||
|
|
* This function must be called before DMA unit can be used.
|
||
|
|
*/
|
||
|
|
extern DMA_Status DMA_Initialize(
|
||
|
|
int (*app_print_function)(char *,...)); /* pointer to optional "printf"
|
||
|
|
* provided by application
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Perform the DMA transfer, only direct mode is currently implemented.
|
||
|
|
* At this point, I think it would be better to define a different
|
||
|
|
* function for chaining mode.
|
||
|
|
* Also, I'm not sure if it is appropriate to have the "generic" API
|
||
|
|
* accept snoop and int_steer parameters. The DINK user interface allows
|
||
|
|
* them, so for now I'll leave them.
|
||
|
|
*
|
||
|
|
* int_steer controls DMA interrupt steering to PCI or local processor
|
||
|
|
* type is the type of transfer: M2M, M2P, P2M, P2P
|
||
|
|
* source is the source address of the data
|
||
|
|
* dest is the destination address of the data
|
||
|
|
* len is the length of data to transfer
|
||
|
|
* channel is the DMA channel to use for the transfer
|
||
|
|
* snoop is the snoop enable control
|
||
|
|
*/
|
||
|
|
extern DMA_Status DMA_direct_transfer( DMA_INTERRUPT_STEER int_steer,
|
||
|
|
DMA_TRANSFER_TYPE type,
|
||
|
|
unsigned int source,
|
||
|
|
unsigned int dest,
|
||
|
|
unsigned int len,
|
||
|
|
DMA_CHANNEL channel,
|
||
|
|
DMA_SNOOP_MODE snoop);
|
||
|
|
#endif
|