diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/shared/vme/vme_universe_dma.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/shared/vme/vme_universe_dma.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/shared/vme/vme_universe_dma.c b/c/src/lib/libbsp/powerpc/shared/vme/vme_universe_dma.c new file mode 100644 index 0000000000..68a0dc887c --- /dev/null +++ b/c/src/lib/libbsp/powerpc/shared/vme/vme_universe_dma.c @@ -0,0 +1,146 @@ +/* $Id$ */ + +/* Implementation of the VMEDMA.h API for the BSP using the vmeUniverse driver */ + +/* + * Authorship + * ---------- + * This software was created by + * Till Straumann <strauman@slac.stanford.edu>, 2006, 2007 + * Stanford Linear Accelerator Center, Stanford University. + * + * Acknowledgement of sponsorship + * ------------------------------ + * This software was produced by + * the Stanford Linear Accelerator Center, Stanford University, + * under Contract DE-AC03-76SFO0515 with the Department of Energy. + * + * Government disclaimer of liability + * ---------------------------------- + * Neither the United States nor the United States Department of Energy, + * nor any of their employees, makes any warranty, express or implied, or + * assumes any legal liability or responsibility for the accuracy, + * completeness, or usefulness of any data, apparatus, product, or process + * disclosed, or represents that its use would not infringe privately owned + * rights. + * + * Stanford disclaimer of liability + * -------------------------------- + * Stanford University makes no representations or warranties, express or + * implied, nor assumes any liability for the use of this software. + * + * Stanford disclaimer of copyright + * -------------------------------- + * Stanford University, owner of the copyright, hereby disclaims its + * copyright and all other rights in this software. Hence, anyone may + * freely use it for any purpose without restriction. + * + * Maintenance of notices + * ---------------------- + * In the interest of clarity regarding the origin and status of this + * SLAC software, this and all the preceding Stanford University notices + * are to remain affixed to any copy or derivative of this software made + * or distributed by the recipient and are to be affixed to any copy of + * software made or distributed by the recipient that contains a copy or + * derivative of this software. + * + * ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03 + */ + +#include <stdint.h> +#include <rtems.h> +#include <bsp.h> +#include <bsp/VME.h> +#include <bsp/VMEDMA.h> +#include <bsp/vmeUniverse.h> +#include <bsp/vmeUniverseDMA.h> +#include <bsp/bspVmeDmaList.h> + +int +BSP_VMEDmaSetup(int channel, uint32_t bus_mode, uint32_t xfer_mode, void *custom_setup) +{ + return vmeUniverseDmaSetup(channel, bus_mode, xfer_mode, custom_setup); +} + +int +BSP_VMEDmaStart(int channel, uint32_t pci_addr, uint32_t vme_addr, uint32_t n_bytes) +{ + return vmeUniverseDmaStart(channel, pci_addr, vme_addr, n_bytes); +} + +uint32_t +BSP_VMEDmaStatus(int channel) +{ + return vmeUniverseDmaStatus(channel); +} + +BSP_VMEDmaListDescriptor +BSP_VMEDmaListDescriptorSetup( + BSP_VMEDmaListDescriptor d, + uint32_t attr_mask, + uint32_t xfer_mode, + uint32_t pci_addr, + uint32_t vme_addr, + uint32_t n_bytes) +{ +VMEDmaListClass pc; + if ( !d ) { + pc = &vmeUniverseDmaListClass; + + return BSP_VMEDmaListDescriptorNewTool( + pc, + attr_mask, + xfer_mode, + pci_addr, + vme_addr, + n_bytes); + + } + return BSP_VMEDmaListDescriptorSetupTool(d, attr_mask, xfer_mode, pci_addr, vme_addr, n_bytes); +} + +int +BSP_VMEDmaListStart(int channel, BSP_VMEDmaListDescriptor list) +{ + return BSP_VMEDmaListDescriptorStartTool(0, channel, list); +} + +/* NOT thread safe! */ +int +BSP_VMEDmaInstallISR(int channel, BSP_VMEDmaIRQCallback cb, void *usr_arg) +{ +int vec; +BSP_VME_ISR_t curr; +void *carg; + + if ( channel != 0 ) + return -1; + + vec = UNIV_DMA_INT_VEC; + + curr = BSP_getVME_isr(vec, &carg); + + if ( cb && curr ) { + /* IRQ currently in use */ + return -1; + } + + if ( !cb && !curr ) { + /* Allow uninstall if no handler is currently installed; + * just make sure IRQ is disabled + */ + BSP_disableVME_int_lvl(vec); + return 0; + } + + if ( cb ) { + if ( BSP_installVME_isr(vec, (BSP_VME_ISR_t)cb, usr_arg) ) + return -4; + BSP_enableVME_int_lvl(vec); + } else { + BSP_disableVME_int_lvl(vec); + if ( BSP_removeVME_isr(vec, curr, carg) ) + return -4; + } + return 0; +} |