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drivers: dma: stm32: Improve code readability

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Some small code readability changes.

Signed-off-by: Erwin Rol <erwin@erwinrol.com>
This commit is contained in:
Erwin Rol 2020-08-23 09:20:17 +02:00 • committed by Carles Cufí
commit c8ae070de7
2 changed files with 28 additions and 50 deletions
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71
drivers/dma/dma_stm32.c
View file

@ -62,6 +62,7 @@ static void dma_stm32_irq_handler(void *arg)
DMA_TypeDef *dma = (DMA_TypeDef *)(config->base);
struct dma_stm32_stream *stream;
int id;
uint32_t callback_arg;
for (id = 0; id < data->max_streams; id++) {
if (func_ll_is_active_tc[id](dma)) {
@ -79,6 +80,12 @@ static void dma_stm32_irq_handler(void *arg)
stream = &data->streams[id];
#ifdef CONFIG_DMAMUX_STM32
callback_arg = stream->mux_channel;
#else
callback_arg = id + STREAM_OFFSET;
#endif /* CONFIG_DMAMUX_STM32 */
if (!IS_ENABLED(CONFIG_DMAMUX_STM32)) {
stream->busy = false;
}
@ -89,35 +96,20 @@ static void dma_stm32_irq_handler(void *arg)
#ifdef CONFIG_DMAMUX_STM32
stream->busy = false;
/* the callback function expects the dmamux channel nb */
stream->dma_callback(dev, stream->user_data,
stream->mux_channel, 0);
#else
stream->dma_callback(dev, stream->user_data,
id + STREAM_OFFSET, 0);
#endif /* CONFIG_DMAMUX_STM32 */
#endif
stream->dma_callback(dev, stream->user_data, callback_arg, 0);
} else if (stm32_dma_is_unexpected_irq_happened(dma, id)) {
LOG_ERR("Unexpected irq happened.");
#ifdef CONFIG_DMAMUX_STM32
stream->dma_callback(dev, stream->user_data,
stream->mux_channel, -EIO);
#else
stream->dma_callback(dev, stream->user_data,
id + STREAM_OFFSET, -EIO);
#endif /* CONFIG_DMAMUX_STM32 */
callback_arg, -EIO);
} else {
LOG_ERR("Transfer Error.");
dma_stm32_dump_stream_irq(dev, id);
dma_stm32_clear_stream_irq(dev, id);
#ifdef CONFIG_DMAMUX_STM32
stream->dma_callback(dev, stream->user_data,
stream->mux_channel, -EIO);
#else
stream->dma_callback(dev, stream->user_data,
id + STREAM_OFFSET, -EIO);
#endif /* CONFIG_DMAMUX_STM32 */
callback_arg, -EIO);
}
}
@ -232,13 +224,8 @@ static int dma_stm32_get_periph_increment(enum dma_addr_adj increment,
return 0;
}
#ifdef CONFIG_DMAMUX_STM32
int dma_stm32_configure(const struct device *dev, uint32_t id,
struct dma_config *config)
#else
static int dma_stm32_configure(const struct device *dev, uint32_t id,
struct dma_config *config)
#endif /* CONFIG_DMAMUX_STM32 */
DMA_STM32_EXPORT_API int dma_stm32_configure(const struct device *dev, uint32_t id,
struct dma_config *config)
{
struct dma_stm32_data *data = dev->data;
struct dma_stm32_stream *stream = &data->streams[id - STREAM_OFFSET];
@ -469,13 +456,9 @@ static int dma_stm32_disable_stream(DMA_TypeDef *dma, uint32_t id)
return 0;
}
#ifdef CONFIG_DMAMUX_STM32
int dma_stm32_reload(const struct device *dev, uint32_t id,
uint32_t src, uint32_t dst, size_t size)
#else
static int dma_stm32_reload(const struct device *dev, uint32_t id,
uint32_t src, uint32_t dst, size_t size)
#endif /* CONFIG_DMAMUX_STM32 */
DMA_STM32_EXPORT_API int dma_stm32_reload(const struct device *dev, uint32_t id,
uint32_t src, uint32_t dst,
size_t size)
{
const struct dma_stm32_config *config = dev->config;
DMA_TypeDef *dma = (DMA_TypeDef *)(config->base);
@ -518,11 +501,7 @@ static int dma_stm32_reload(const struct device *dev, uint32_t id,
return 0;
}
#ifdef CONFIG_DMAMUX_STM32
int dma_stm32_start(const struct device *dev, uint32_t id)
#else
static int dma_stm32_start(const struct device *dev, uint32_t id)
#endif /* CONFIG_DMAMUX_STM32 */
DMA_STM32_EXPORT_API int dma_stm32_start(const struct device *dev, uint32_t id)
{
const struct dma_stm32_config *config = dev->config;
DMA_TypeDef *dma = (DMA_TypeDef *)(config->base);
@ -543,11 +522,7 @@ static int dma_stm32_start(const struct device *dev, uint32_t id)
return 0;
}
#ifdef CONFIG_DMAMUX_STM32
int dma_stm32_stop(const struct device *dev, uint32_t id)
#else
static int dma_stm32_stop(const struct device *dev, uint32_t id)
#endif /* CONFIG_DMAMUX_STM32 */
DMA_STM32_EXPORT_API int dma_stm32_stop(const struct device *dev, uint32_t id)
{
struct dma_stm32_data *data = dev->data;
struct dma_stm32_stream *stream = &data->streams[id - STREAM_OFFSET];
@ -654,11 +629,11 @@ static const struct dma_driver_api dma_funcs = {
static void dma_stm32_config_irq_##index(const struct device *dev); \
\
const struct dma_stm32_config dma_stm32_config_##index = { \
.pclken = { .bus = DT_INST_CLOCKS_CELL(index, bus), \
.enr = DT_INST_CLOCKS_CELL(index, bits) }, \
.pclken = { .bus = DT_INST_CLOCKS_CELL(index, bus), \
.enr = DT_INST_CLOCKS_CELL(index, bits) }, \
.config_irq = dma_stm32_config_irq_##index, \
.base = DT_INST_REG_ADDR(index), \
.support_m2m = DT_INST_PROP(index, st_mem2mem), \
.base = DT_INST_REG_ADDR(index), \
.support_m2m = DT_INST_PROP(index, st_mem2mem), \
}; \
\
static struct dma_stm32_data dma_stm32_data_##index = { \
@ -666,7 +641,7 @@ static struct dma_stm32_data dma_stm32_data_##index = { \
.streams = NULL, \
}; \
\
DEVICE_AND_API_INIT(dma_##index, DT_INST_LABEL(index), \
DEVICE_AND_API_INIT(dma_##index, DT_INST_LABEL(index), \
&dma_stm32_init, \
&dma_stm32_data_##index, &dma_stm32_config_##index, \
PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT, \

7
drivers/dma/dma_stm32.h
View file

@ -75,12 +75,15 @@ uint32_t stm32_dma_get_pburst(struct dma_config *config, bool source_periph);
#ifdef CONFIG_DMAMUX_STM32
/* dma_stm32_ api functions are exported to the dmamux_stm32 */
#define DMA_STM32_EXPORT_API
int dma_stm32_configure(const struct device *dev, uint32_t id,
struct dma_config *config);
struct dma_config *config);
int dma_stm32_reload(const struct device *dev, uint32_t id,
uint32_t src, uint32_t dst, size_t size);
uint32_t src, uint32_t dst, size_t size);
int dma_stm32_start(const struct device *dev, uint32_t id);
int dma_stm32_stop(const struct device *dev, uint32_t id);
#else
#define DMA_STM32_EXPORT_API static
#endif /* CONFIG_DMAMUX_STM32 */
#endif /* DMA_STM32_H_*/