diff options
Diffstat (limited to 'src/stm/ao_spi_stm.c')
| -rw-r--r-- | src/stm/ao_spi_stm.c | 162 |
1 files changed, 52 insertions, 110 deletions
diff --git a/src/stm/ao_spi_stm.c b/src/stm/ao_spi_stm.c index 214092f6..05078f3b 100644 --- a/src/stm/ao_spi_stm.c +++ b/src/stm/ao_spi_stm.c @@ -3,7 +3,8 @@ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of @@ -85,6 +86,46 @@ validate_spi(struct stm_spi *stm_spi, int which, uint16_t len) #endif static void +ao_spi_set_dma_mosi(uint8_t id, const void *data, uint16_t len, uint32_t minc) +{ + struct stm_spi *stm_spi = ao_spi_stm_info[id].stm_spi; + uint8_t mosi_dma_index = ao_spi_stm_info[id].mosi_dma_index; + + ao_dma_set_transfer(mosi_dma_index, + &stm_spi->dr, + (void *) data, + len, + (0 << STM_DMA_CCR_MEM2MEM) | + (STM_DMA_CCR_PL_MEDIUM << STM_DMA_CCR_PL) | + (STM_DMA_CCR_MSIZE_8 << STM_DMA_CCR_MSIZE) | + (STM_DMA_CCR_PSIZE_8 << STM_DMA_CCR_PSIZE) | + (minc << STM_DMA_CCR_MINC) | + (0 << STM_DMA_CCR_PINC) | + (0 << STM_DMA_CCR_CIRC) | + (STM_DMA_CCR_DIR_MEM_TO_PER << STM_DMA_CCR_DIR)); +} + +static void +ao_spi_set_dma_miso(uint8_t id, void *data, uint16_t len, uint32_t minc) +{ + struct stm_spi *stm_spi = ao_spi_stm_info[id].stm_spi; + uint8_t miso_dma_index = ao_spi_stm_info[id].miso_dma_index; + + ao_dma_set_transfer(miso_dma_index, + &stm_spi->dr, + data, + len, + (0 << STM_DMA_CCR_MEM2MEM) | + (STM_DMA_CCR_PL_HIGH << STM_DMA_CCR_PL) | + (STM_DMA_CCR_MSIZE_8 << STM_DMA_CCR_MSIZE) | + (STM_DMA_CCR_PSIZE_8 << STM_DMA_CCR_PSIZE) | + (minc << STM_DMA_CCR_MINC) | + (0 << STM_DMA_CCR_PINC) | + (0 << STM_DMA_CCR_CIRC) | + (STM_DMA_CCR_DIR_PER_TO_MEM << STM_DMA_CCR_DIR)); +} + +static void ao_spi_run(uint8_t id, uint8_t which, uint16_t len) { struct stm_spi *stm_spi = ao_spi_stm_info[id].stm_spi; @@ -123,40 +164,15 @@ void ao_spi_send(const void *block, uint16_t len, uint8_t spi_index) { uint8_t id = AO_SPI_INDEX(spi_index); - struct stm_spi *stm_spi = ao_spi_stm_info[id].stm_spi; - uint8_t mosi_dma_index = ao_spi_stm_info[id].mosi_dma_index; - uint8_t miso_dma_index = ao_spi_stm_info[id].miso_dma_index; /* Set up the transmit DMA to deliver data */ - ao_dma_set_transfer(mosi_dma_index, - &stm_spi->dr, - (void *) block, - len, - (0 << STM_DMA_CCR_MEM2MEM) | - (STM_DMA_CCR_PL_MEDIUM << STM_DMA_CCR_PL) | - (STM_DMA_CCR_MSIZE_8 << STM_DMA_CCR_MSIZE) | - (STM_DMA_CCR_PSIZE_8 << STM_DMA_CCR_PSIZE) | - (1 << STM_DMA_CCR_MINC) | - (0 << STM_DMA_CCR_PINC) | - (0 << STM_DMA_CCR_CIRC) | - (STM_DMA_CCR_DIR_MEM_TO_PER << STM_DMA_CCR_DIR)); + ao_spi_set_dma_mosi(id, block, len, 1); /* Set up the receive DMA -- when this is done, we know the SPI unit * is idle. Without this, we'd have to poll waiting for the BSY bit to * be cleared */ - ao_dma_set_transfer(miso_dma_index, - &stm_spi->dr, - &spi_dev_null, - len, - (0 << STM_DMA_CCR_MEM2MEM) | - (STM_DMA_CCR_PL_MEDIUM << STM_DMA_CCR_PL) | - (STM_DMA_CCR_MSIZE_8 << STM_DMA_CCR_MSIZE) | - (STM_DMA_CCR_PSIZE_8 << STM_DMA_CCR_PSIZE) | - (0 << STM_DMA_CCR_MINC) | - (0 << STM_DMA_CCR_PINC) | - (0 << STM_DMA_CCR_CIRC) | - (STM_DMA_CCR_DIR_PER_TO_MEM << STM_DMA_CCR_DIR)); + ao_spi_set_dma_miso(id, &spi_dev_null, len, 0); ao_spi_run(id, 1, len); } @@ -165,40 +181,15 @@ void ao_spi_send_fixed(uint8_t value, uint16_t len, uint8_t spi_index) { uint8_t id = AO_SPI_INDEX(spi_index); - struct stm_spi *stm_spi = ao_spi_stm_info[id].stm_spi; - uint8_t mosi_dma_index = ao_spi_stm_info[id].mosi_dma_index; - uint8_t miso_dma_index = ao_spi_stm_info[id].miso_dma_index; /* Set up the transmit DMA to deliver data */ - ao_dma_set_transfer(mosi_dma_index, - &stm_spi->dr, - &value, - len, - (0 << STM_DMA_CCR_MEM2MEM) | - (STM_DMA_CCR_PL_MEDIUM << STM_DMA_CCR_PL) | - (STM_DMA_CCR_MSIZE_8 << STM_DMA_CCR_MSIZE) | - (STM_DMA_CCR_PSIZE_8 << STM_DMA_CCR_PSIZE) | - (0 << STM_DMA_CCR_MINC) | - (0 << STM_DMA_CCR_PINC) | - (0 << STM_DMA_CCR_CIRC) | - (STM_DMA_CCR_DIR_MEM_TO_PER << STM_DMA_CCR_DIR)); + ao_spi_set_dma_mosi(id, &value, len, 0); /* Set up the receive DMA -- when this is done, we know the SPI unit * is idle. Without this, we'd have to poll waiting for the BSY bit to * be cleared */ - ao_dma_set_transfer(miso_dma_index, - &stm_spi->dr, - &spi_dev_null, - len, - (0 << STM_DMA_CCR_MEM2MEM) | - (STM_DMA_CCR_PL_MEDIUM << STM_DMA_CCR_PL) | - (STM_DMA_CCR_MSIZE_8 << STM_DMA_CCR_MSIZE) | - (STM_DMA_CCR_PSIZE_8 << STM_DMA_CCR_PSIZE) | - (0 << STM_DMA_CCR_MINC) | - (0 << STM_DMA_CCR_PINC) | - (0 << STM_DMA_CCR_CIRC) | - (STM_DMA_CCR_DIR_PER_TO_MEM << STM_DMA_CCR_DIR)); + ao_spi_set_dma_miso(id, &spi_dev_null, len, 0); ao_spi_run(id, 3, len); } @@ -267,78 +258,29 @@ void ao_spi_recv(void *block, uint16_t len, uint8_t spi_index) { uint8_t id = AO_SPI_INDEX(spi_index); - struct stm_spi *stm_spi = ao_spi_stm_info[id].stm_spi; - uint8_t mosi_dma_index = ao_spi_stm_info[id].mosi_dma_index; - uint8_t miso_dma_index = ao_spi_stm_info[id].miso_dma_index; spi_dev_null = 0xff; /* Set up transmit DMA to make the SPI hardware actually run */ - ao_dma_set_transfer(mosi_dma_index, - &stm_spi->dr, - &spi_dev_null, - len, - (0 << STM_DMA_CCR_MEM2MEM) | - (STM_DMA_CCR_PL_MEDIUM << STM_DMA_CCR_PL) | - (STM_DMA_CCR_MSIZE_8 << STM_DMA_CCR_MSIZE) | - (STM_DMA_CCR_PSIZE_8 << STM_DMA_CCR_PSIZE) | - (0 << STM_DMA_CCR_MINC) | - (0 << STM_DMA_CCR_PINC) | - (0 << STM_DMA_CCR_CIRC) | - (STM_DMA_CCR_DIR_MEM_TO_PER << STM_DMA_CCR_DIR)); + ao_spi_set_dma_mosi(id, &spi_dev_null, len, 0); /* Set up the receive DMA to capture data */ - ao_dma_set_transfer(miso_dma_index, - &stm_spi->dr, - block, - len, - (0 << STM_DMA_CCR_MEM2MEM) | - (STM_DMA_CCR_PL_MEDIUM << STM_DMA_CCR_PL) | - (STM_DMA_CCR_MSIZE_8 << STM_DMA_CCR_MSIZE) | - (STM_DMA_CCR_PSIZE_8 << STM_DMA_CCR_PSIZE) | - (1 << STM_DMA_CCR_MINC) | - (0 << STM_DMA_CCR_PINC) | - (0 << STM_DMA_CCR_CIRC) | - (STM_DMA_CCR_DIR_PER_TO_MEM << STM_DMA_CCR_DIR)); + ao_spi_set_dma_miso(id, block, len, 1); ao_spi_run(id, 9, len); } void -ao_spi_duplex(void *out, void *in, uint16_t len, uint8_t spi_index) +ao_spi_duplex(const void *out, void *in, uint16_t len, uint8_t spi_index) { uint8_t id = AO_SPI_INDEX(spi_index); - struct stm_spi *stm_spi = ao_spi_stm_info[id].stm_spi; - uint8_t mosi_dma_index = ao_spi_stm_info[id].mosi_dma_index; - uint8_t miso_dma_index = ao_spi_stm_info[id].miso_dma_index; /* Set up transmit DMA to send data */ - ao_dma_set_transfer(mosi_dma_index, - &stm_spi->dr, - out, - len, - (0 << STM_DMA_CCR_MEM2MEM) | - (STM_DMA_CCR_PL_MEDIUM << STM_DMA_CCR_PL) | - (STM_DMA_CCR_MSIZE_8 << STM_DMA_CCR_MSIZE) | - (STM_DMA_CCR_PSIZE_8 << STM_DMA_CCR_PSIZE) | - (1 << STM_DMA_CCR_MINC) | - (0 << STM_DMA_CCR_PINC) | - (0 << STM_DMA_CCR_CIRC) | - (STM_DMA_CCR_DIR_MEM_TO_PER << STM_DMA_CCR_DIR)); + ao_spi_set_dma_mosi(id, out, len, 1); /* Set up the receive DMA to capture data */ - ao_dma_set_transfer(miso_dma_index, - &stm_spi->dr, - in, - len, - (0 << STM_DMA_CCR_MEM2MEM) | - (STM_DMA_CCR_PL_MEDIUM << STM_DMA_CCR_PL) | - (STM_DMA_CCR_MSIZE_8 << STM_DMA_CCR_MSIZE) | - (STM_DMA_CCR_PSIZE_8 << STM_DMA_CCR_PSIZE) | - (1 << STM_DMA_CCR_MINC) | - (0 << STM_DMA_CCR_PINC) | - (0 << STM_DMA_CCR_CIRC) | - (STM_DMA_CCR_DIR_PER_TO_MEM << STM_DMA_CCR_DIR)); + ao_spi_set_dma_miso(id, in, len, 1); + ao_spi_run(id, 11, len); } |