diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/lpc176x/misc/dma-copy.c')
| -rw-r--r-- | c/src/lib/libbsp/arm/lpc176x/misc/dma-copy.c | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/c/src/lib/libbsp/arm/lpc176x/misc/dma-copy.c b/c/src/lib/libbsp/arm/lpc176x/misc/dma-copy.c deleted file mode 100644 index 0e0b37dbd3..0000000000 --- a/c/src/lib/libbsp/arm/lpc176x/misc/dma-copy.c +++ /dev/null @@ -1,220 +0,0 @@ -/** - * @file - * - * @ingroup lpc176x_dma - * - * @brief Direct memory access (DMA) support. - */ - -/* - * Copyright (c) 2008, 2009 - * embedded brains GmbH - * Obere Lagerstr. 30 - * D-82178 Puchheim - * Germany - * <rtems@embedded-brains.de> - * - * The license and distribution terms for this file may be - * found in the file LICENSE in this distribution or at - * http://www.rtems.org/license/LICENSE. - */ - -#include <bsp/lpc176x.h> -#include <bsp/dma.h> -#include <bsp/irq.h> - -static rtems_id lpc176x_dma_sema_table[ GPDMA_CH_NUMBER ]; -static bool lpc176x_dma_status_table[ GPDMA_CH_NUMBER ]; - -static void lpc176x_dma_copy_handler( void *arg ) -{ - /* Get interrupt status */ - uint32_t tc = GPDMA_INT_TCSTAT; - uint32_t err = GPDMA_INT_ERR_STAT; - - /* Clear interrupt status */ - GPDMA_INT_TCCLR = tc; - GPDMA_INT_ERR_CLR = err; - - if ( ( tc & GPDMA_STATUS_CH_0 ) != 0 ) { - rtems_semaphore_release( lpc176x_dma_sema_table[ 0 ] ); - } - - /* else implies that the channel is not the 0. Also, - there is nothing to do. */ - - lpc176x_dma_status_table[ 0 ] = ( err & GPDMA_STATUS_CH_0 ) == 0; - - if ( ( tc & GPDMA_STATUS_CH_1 ) != 0 ) { - rtems_semaphore_release( lpc176x_dma_sema_table[ 1 ] ); - } - - /* else implies that the channel is not the 1. Also, - there is nothing to do. */ - - lpc176x_dma_status_table[ 1 ] = ( err & GPDMA_STATUS_CH_1 ) == 0; -} - -rtems_status_code lpc176x_dma_copy_initialize( void ) -{ - rtems_status_code status_code = RTEMS_SUCCESSFUL; - rtems_id id0 = RTEMS_ID_NONE; - rtems_id id1 = RTEMS_ID_NONE; - - /* Create semaphore for channel 0 */ - status_code = rtems_semaphore_create( rtems_build_name( 'D', 'M', 'A', '0' ), - 0, - RTEMS_LOCAL | RTEMS_FIFO | RTEMS_SIMPLE_BINARY_SEMAPHORE, - 0, - &id0 ); - - if ( status_code != RTEMS_SUCCESSFUL ) { - return status_code; - } - - /* else implies that the semaphore to the channel 0 was created succefully. - Also, there is nothing to do. */ - - /* Create semaphore for channel 1 */ - status_code = rtems_semaphore_create( rtems_build_name( 'D', 'M', 'A', '1' ), - 0, - RTEMS_LOCAL | RTEMS_FIFO | RTEMS_SIMPLE_BINARY_SEMAPHORE, - 0, - &id1 ); - - if ( status_code != RTEMS_SUCCESSFUL ) { - rtems_semaphore_delete( id0 ); - - return status_code; - } - - /* else implies that the semaphore to the channel 1 was created succefully. - Also, there is nothing to do. */ - - /* Install DMA interrupt handler */ - status_code = rtems_interrupt_handler_install( LPC176X_IRQ_DMA, - "DMA copy", - RTEMS_INTERRUPT_UNIQUE, - lpc176x_dma_copy_handler, - NULL ); - - if ( status_code != RTEMS_SUCCESSFUL ) { - rtems_semaphore_delete( id0 ); - rtems_semaphore_delete( id1 ); - - return status_code; - } - - /* else implies that the interrupt handler was installed succefully. Also, - there is nothing to do. */ - - /* Initialize global data */ - lpc176x_dma_sema_table[ 0 ] = id0; - lpc176x_dma_sema_table[ 1 ] = id1; - - return RTEMS_SUCCESSFUL; -} - -rtems_status_code lpc176x_dma_copy_release( void ) -{ - rtems_status_code status_code = RTEMS_SUCCESSFUL; - rtems_status_code status_code_aux = RTEMS_SUCCESSFUL; - - status_code = rtems_interrupt_handler_remove( LPC176X_IRQ_DMA, - lpc176x_dma_copy_handler, - NULL ); - - if ( status_code != RTEMS_SUCCESSFUL ) { - status_code_aux = status_code; - } - - /* else implies that the interrupt handler was removed succefully. Also, - there is nothing to do. */ - - status_code = rtems_semaphore_delete( lpc176x_dma_sema_table[ 0 ] ); - - if ( status_code != RTEMS_SUCCESSFUL ) { - status_code_aux = status_code; - } - - /* else implies that the semaphore to the channel 0 was deleted succefully. - Also, there is nothing to do. */ - - status_code = rtems_semaphore_delete( lpc176x_dma_sema_table[ 1 ] ); - - if ( status_code != RTEMS_SUCCESSFUL ) { - status_code_aux = status_code; - } - - /* else implies that the semaphore to the channel 1 was deleted succefully. - Also, there is nothing to do. */ - - return status_code_aux; -} - -rtems_status_code lpc176x_dma_copy( - unsigned channel, - const void *const dest, - const void *const src, - size_t n, - const size_t width -) -{ - rtems_status_code status_code = RTEMS_SUCCESSFUL; - volatile lpc176x_dma_channel *e = GPDMA_CH_BASE_ADDR( channel ); - uint32_t w = GPDMA_CH_CTRL_W_8; - - switch ( width ) { - case 4: - w = GPDMA_CH_CTRL_W_32; - break; - case 2: - w = GPDMA_CH_CTRL_W_16; - break; - } - - n = n >> w; - - if ( n > 0 && n < 4096 ) { - e->desc.src = (uint32_t) src; - e->desc.dest = (uint32_t) dest; - e->desc.lli = 0; - e->desc.ctrl = SET_GPDMA_CH_CTRL_TSZ( 0, n ) | - SET_GPDMA_CH_CTRL_SBSZ( 0, GPDMA_CH_CTRL_BSZ_1 ) | - SET_GPDMA_CH_CTRL_DBSZ( 0, GPDMA_CH_CTRL_BSZ_1 ) | - SET_GPDMA_CH_CTRL_SW( 0, w ) | - SET_GPDMA_CH_CTRL_DW( 0, w ) | - GPDMA_CH_CTRL_ITC | - GPDMA_CH_CTRL_SI | - GPDMA_CH_CTRL_DI; - e->cfg = SET_GPDMA_CH_CFG_FLOW( 0, GPDMA_CH_CFG_FLOW_MEM_TO_MEM_DMA ) | - GPDMA_CH_CFG_IE | - GPDMA_CH_CFG_ITC | - GPDMA_CH_CFG_EN; - } else { - status_code = RTEMS_INVALID_SIZE; - } - - return status_code; -} - -rtems_status_code lpc176x_dma_copy_wait( const unsigned channel ) -{ - rtems_status_code status_code = RTEMS_SUCCESSFUL; - - status_code = rtems_semaphore_obtain( lpc176x_dma_sema_table[ channel ], - RTEMS_WAIT, - RTEMS_NO_TIMEOUT ); - - if ( status_code != RTEMS_SUCCESSFUL ) { - return status_code; - } - - /* else implies that the semaphore was obtained succefully. Also, - there is nothing to do. */ - - status_code = lpc176x_dma_status_table[ channel ] - ? RTEMS_SUCCESSFUL : RTEMS_IO_ERROR; - - return status_code; -} |