Beispiel #1
0
static void omap24xxcam_dmahw_transfer_chain(void __iomem *base, int dmach,
					     int free_dmach)
{
	int prev_dmach, ch;

	if (dmach == 0)
		prev_dmach = NUM_CAMDMA_CHANNELS - 1;
	else
		prev_dmach = dmach - 1;
	omap24xxcam_reg_out(base, CAMDMA_CLNK_CTRL(prev_dmach),
			    CAMDMA_CLNK_CTRL_ENABLE_LNK | dmach);
	/* Did we chain the DMA transfer before the previous one
	 * finished?
	 */
	ch = (dmach + free_dmach) % NUM_CAMDMA_CHANNELS;
	while (!(omap24xxcam_reg_in(base, CAMDMA_CCR(ch))
		 & CAMDMA_CCR_ENABLE)) {
		if (ch == dmach) {
			/* The previous transfer has ended and this one
			 * hasn't started, so we must not have chained
			 * to the previous one in time.  We'll have to
			 * start it now.
			 */
			omap24xxcam_dmahw_transfer_start(base, dmach);
			break;
		} else
			ch = (ch + 1) % NUM_CAMDMA_CHANNELS;
	}
}
Beispiel #2
0
/* Abort all chained DMA transfers. After all transfers have been
 * aborted and the DMA controller is idle, the completion routines for
 * any aborted transfers will be called in sequence. The DMA
 * controller may not be idle after this routine completes, because
 * the completion routines might start new transfers.
 */
static void omap24xxcam_dmahw_abort_ch(void __iomem *base, int dmach)
{
	/* mask all interrupts from this channel */
	omap24xxcam_reg_out(base, CAMDMA_CICR(dmach), 0);
	/* unlink this channel */
	omap24xxcam_reg_merge(base, CAMDMA_CLNK_CTRL(dmach), 0,
			      CAMDMA_CLNK_CTRL_ENABLE_LNK);
	/* disable this channel */
	omap24xxcam_reg_merge(base, CAMDMA_CCR(dmach), 0, CAMDMA_CCR_ENABLE);
}
Beispiel #3
0
static void omap24xxcam_dmahw_abort_ch(unsigned long base, int dmach)
{
	
	omap24xxcam_reg_out(base, CAMDMA_CICR(dmach), 0);
	
	omap24xxcam_reg_merge(base, CAMDMA_CLNK_CTRL(dmach), 0,
			      CAMDMA_CLNK_CTRL_ENABLE_LNK);
	
	omap24xxcam_reg_merge(base, CAMDMA_CCR(dmach), 0, CAMDMA_CCR_ENABLE);
}
Beispiel #4
0
static void omap24xxcam_dmahw_transfer_setup(void __iomem *base, int dmach,
					     dma_addr_t start, u32 len)
{
	omap24xxcam_reg_out(base, CAMDMA_CCR(dmach),
			    CAMDMA_CCR_SEL_SRC_DST_SYNC
			    | CAMDMA_CCR_BS
			    | CAMDMA_CCR_DST_AMODE_POST_INC
			    | CAMDMA_CCR_SRC_AMODE_POST_INC
			    | CAMDMA_CCR_FS
			    | CAMDMA_CCR_WR_ACTIVE
			    | CAMDMA_CCR_RD_ACTIVE
			    | CAMDMA_CCR_SYNCHRO_CAMERA);
	omap24xxcam_reg_out(base, CAMDMA_CLNK_CTRL(dmach), 0);
	omap24xxcam_reg_out(base, CAMDMA_CEN(dmach), len);
	omap24xxcam_reg_out(base, CAMDMA_CFN(dmach), 1);
	omap24xxcam_reg_out(base, CAMDMA_CSDP(dmach),
			    CAMDMA_CSDP_WRITE_MODE_POSTED
			    | CAMDMA_CSDP_DST_BURST_EN_32
			    | CAMDMA_CSDP_DST_PACKED
			    | CAMDMA_CSDP_SRC_BURST_EN_32
			    | CAMDMA_CSDP_SRC_PACKED
			    | CAMDMA_CSDP_DATA_TYPE_8BITS);
	omap24xxcam_reg_out(base, CAMDMA_CSSA(dmach), 0);
	omap24xxcam_reg_out(base, CAMDMA_CDSA(dmach), start);
	omap24xxcam_reg_out(base, CAMDMA_CSEI(dmach), 0);
	omap24xxcam_reg_out(base, CAMDMA_CSFI(dmach), DMA_THRESHOLD);
	omap24xxcam_reg_out(base, CAMDMA_CDEI(dmach), 0);
	omap24xxcam_reg_out(base, CAMDMA_CDFI(dmach), 0);
	omap24xxcam_reg_out(base, CAMDMA_CSR(dmach),
			    CAMDMA_CSR_MISALIGNED_ERR
			    | CAMDMA_CSR_SECURE_ERR
			    | CAMDMA_CSR_TRANS_ERR
			    | CAMDMA_CSR_BLOCK
			    | CAMDMA_CSR_DROP);
	omap24xxcam_reg_out(base, CAMDMA_CICR(dmach),
			    CAMDMA_CICR_MISALIGNED_ERR_IE
			    | CAMDMA_CICR_SECURE_ERR_IE
			    | CAMDMA_CICR_TRANS_ERR_IE
			    | CAMDMA_CICR_BLOCK_IE
			    | CAMDMA_CICR_DROP_IE);
}
Beispiel #5
0
static void omap24xxcam_dmahw_transfer_chain(unsigned long base, int dmach,
					     int free_dmach)
{
	int prev_dmach, ch;

	if (dmach == 0)
		prev_dmach = NUM_CAMDMA_CHANNELS - 1;
	else
		prev_dmach = dmach - 1;
	omap24xxcam_reg_out(base, CAMDMA_CLNK_CTRL(prev_dmach),
			    CAMDMA_CLNK_CTRL_ENABLE_LNK | dmach);
	
	ch = (dmach + free_dmach) % NUM_CAMDMA_CHANNELS;
	while (!(omap24xxcam_reg_in(base, CAMDMA_CCR(ch))
		 & CAMDMA_CCR_ENABLE)) {
		if (ch == dmach) {
			
			omap24xxcam_dmahw_transfer_start(base, dmach);
			break;
		} else
			ch = (ch + 1) % NUM_CAMDMA_CHANNELS;
	}
}