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spi: implement processing

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Implement processing with writing to provided buffer or in-place
Fix types.
Add more PortInfo flags
Remove release-id, we now use a callback, which is more practical and
still allows deallocation out of the rt-threads if needed as well as
recycling the buffers into an atomic pool
Add more comments
Allow NULL in set_params to reset params
This commit is contained in:
Wim Taymans 2016-06-02 16:40:20 +02:00
parent b44d2d86b6
commit 03046301bf
5 changed files with 333 additions and 109 deletions
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39
pinos/spi/buffer.h
View file

@ -60,10 +60,16 @@ typedef enum {
SPI_DATA_TYPE_FD,
} SpiDataType;
/**
* SpiDataFd
* fd: a file descriptor
* offset: offset in the data referenced by @fd
* @size: size of data referenced by fd
*/
typedef struct {
int fd;
int offset;
size_t size;
int fd;
unsigned int offset;
size_t size;
} SpiDataFD;
/**
@ -79,8 +85,6 @@ typedef struct {
size_t size;
} SpiData;
typedef void (*SpiNotify) (void *data);
/**
* SpiBuffer:
* @refcount: reference counter
@ -95,10 +99,31 @@ struct _SpiBuffer {
volatile int refcount;
SpiNotify notify;
size_t size;
int n_metas;
unsigned int n_metas;
SpiMeta *metas;
int n_datas;
unsigned int n_datas;
SpiData *datas;
};
static inline SpiBuffer *
spi_buffer_ref (SpiBuffer *buffer)
{
if (buffer != NULL)
buffer->refcount++;
return buffer;
}
static inline SpiBuffer *
spi_buffer_unref (SpiBuffer *buffer)
{
if (buffer != NULL) {
if (--buffer->refcount == 0) {
buffer->notify (buffer);
return NULL;
}
}
return buffer;
}
#endif /* __SPI_BUFFER_H__ */