/**
* BAM DMA device enable
*
* This function initializes a BAM DMA device.
*
* @dev - pointer to BAM DMA device context
*
* @return 0 on success, negative value on error
*
*/
static int sps_dma_device_disable(struct bamdma_device *dev)
{
u32 pipe_index;
if (!dev->enabled)
return 0;
/* Do not disable if channels active */
for (pipe_index = 0; pipe_index < dev->num_pipes; pipe_index++) {
if (dev->pipes[pipe_index] != PIPE_INACTIVE)
break;
}
if (pipe_index < dev->num_pipes) {
SPS_ERR("Failed to disable BAM-DMA %x: channels are active",
dev->phys_addr);
return SPS_ERROR;
}
dev->enabled = false;
/* Disable BAM device */
if (sps_bam_disable(dev->bam)) {
SPS_ERR("Failed to disable BAM-DMA %x BAM", dev->phys_addr);
return SPS_ERROR;
}
/* Is the BAM-DMA device locally controlled? */
if (dev->local)
/* Disable BAM-DMA device */
dma_write_reg(dev->virt_addr, DMA_ENBL, 0);
return 0;
}
static int sps_dma_device_disable(struct bamdma_device *dev)
{
u32 pipe_index;
if (!dev->enabled)
return 0;
for (pipe_index = 0; pipe_index < dev->num_pipes; pipe_index++) {
if (dev->pipes[pipe_index] != PIPE_INACTIVE)
break;
}
if (pipe_index < dev->num_pipes) {
SPS_ERR("sps:Fail to disable BAM-DMA %x:channels are active",
dev->phys_addr);
return SPS_ERROR;
}
dev->enabled = false;
if (sps_bam_disable(dev->bam)) {
SPS_ERR("sps:Fail to disable BAM-DMA BAM:%x", dev->phys_addr);
return SPS_ERROR;
}
if (dev->local)
dma_write_reg(dev->virt_addr, DMA_ENBL, 0);
return 0;
}
static int sps_dma_device_enable(struct bamdma_device *dev)
{
if (dev->enabled)
return 0;
if (dev->local)
dma_write_reg(dev->virt_addr, DMA_ENBL, 1);
if (sps_bam_enable(dev->bam)) {
SPS_ERR("sps:Failed to enable BAM DMA's BAM: %x",
dev->phys_addr);
return SPS_ERROR;
}
dev->enabled = true;
return 0;
}
/**
* BAM DMA device enable
*
* This function enables a BAM DMA device and the associated BAM.
*
* @dev - pointer to BAM DMA device context
*
* @return 0 on success, negative value on error
*
*/
static int sps_dma_device_enable(struct bamdma_device *dev)
{
if (dev->enabled)
return 0;
/*
* If the BAM-DMA device is locally controlled then enable BAM-DMA
* device
*/
if (dev->local)
dma_write_reg(dev->virt_addr, DMA_ENBL, 1);
/* Enable BAM device */
if (sps_bam_enable(dev->bam)) {
SPS_ERR("Failed to enable BAM DMA's BAM: %x", dev->phys_addr);
return SPS_ERROR;
}
dev->enabled = true;
return 0;
}
