C++ (Cpp) ppc4xx_set_sg_addr Examples

Example #1

File: ppc4xx_sgdma.c Project: 274914765/C

/*
 * Enable (start) the DMA described by the sgl handle.
 */
void
ppc4xx_enable_dma_sgl(sgl_handle_t handle)
{
    sgl_list_info_t *psgl = (sgl_list_info_t *) handle;
    ppc_dma_ch_t *p_dma_ch;
    uint32_t sg_command;

    if (!handle) {
        printk("ppc4xx_enable_dma_sgl: null handle\n");
        return;
    } else if (psgl->dmanr > (MAX_PPC4xx_DMA_CHANNELS - 1)) {
        printk("ppc4xx_enable_dma_sgl: bad channel in handle %d\n",
               psgl->dmanr);
        return;
    } else if (!psgl->phead) {
        printk("ppc4xx_enable_dma_sgl: sg list empty\n");
        return;
    }

    p_dma_ch = &dma_channels[psgl->dmanr];
    psgl->ptail->control_count &= ~SG_LINK;    /* make this the last dscrptr */
    sg_command = mfdcr(DCRN_ASGC);

    ppc4xx_set_sg_addr(psgl->dmanr, psgl->phead_dma);

    sg_command |= SSG_ENABLE(psgl->dmanr);

    mtdcr(DCRN_ASGC, sg_command);    /* start transfer */
}

Example #2

File: ppc4xx_sgdma.c Project: Picture-Elements/linux-2.4-peijse

/*
 * Enable (start) the DMA described by the sgl handle.
 */
static __inline__ void
ppc4xx_enable_dma_sgl(sgl_handle_t handle)
{
	sgl_list_info_t *psgl = (sgl_list_info_t *) handle;
	ppc_dma_ch_t *p_dma_ch;
	uint32_t sg_command;

	if (!handle) {
		printk("ppc4xx_enable_dma_sgl: null handle\n");
		return;
	} else if (psgl->dmanr > (MAX_PPC4xx_DMA_CHANNELS - 1)) {
		printk("ppc4xx_enable_dma_sgl: bad channel in handle %d\n",
		       psgl->dmanr);
		return;
	} else if (!psgl->phead) {
		printk("ppc4xx_enable_dma_sgl: sg list empty\n");
		return;
	}

	p_dma_ch = &dma_channels[psgl->dmanr];
	psgl->ptail->control_count &= ~SG_LINK;	/* make this the last dscrptr */
	sg_command = mfdcr(DCRN_ASGC);

	ppc4xx_set_sg_addr(psgl->dmanr, iopa((unsigned long)psgl->phead));

	switch (psgl->dmanr) {
	case 0:
		sg_command |= SSG0_ENABLE;
		break;
	case 1:
		sg_command |= SSG1_ENABLE;
		break;
	case 2:
		sg_command |= SSG2_ENABLE;
		break;
	case 3:
		sg_command |= SSG3_ENABLE;
		break;
	default:
		printk("ppc4xx_enable_dma_sgl: bad channel: %d\n", psgl->dmanr);
	}

	mtdcr(DCRN_ASGC, sg_command);	/* start transfer */
}