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;
}
}
/* 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);
}
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);
}
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);
}
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;
}
}