static int dma_dwc_xfer_setup(struct scatterlist *sg, int num_elems,
struct lli *lli, dma_addr_t dma_lli,
void __iomem *addr, int dir)
{
int dma_ch;
int num_lli;
/* Acquire DMA channel */
dma_ch = dma_request_channel();
if (dma_ch == -1) {
dev_err(host_pvt.dwc_dev, "%s: dma channel unavailable\n",
__func__);
return -EAGAIN;
}
/* Convert SG list to linked list of items (LLIs) for AHB DMA */
num_lli = map_sg_to_lli(sg, num_elems, lli, dma_lli, addr, dir);
dev_dbg(host_pvt.dwc_dev, "%s sg: 0x%p, count: %d lli: %p dma_lli:"
" 0x%0xlx addr: %p lli count: %d\n", __func__, sg, num_elems,
lli, (u32)dma_lli, addr, num_lli);
clear_chan_interrupts(dma_ch);
/* Program the CFG register. */
out_le32(&(host_pvt.sata_dma_regs->chan_regs[dma_ch].cfg.high),
DMA_CFG_HW_HS_SRC(dma_ch) | DMA_CFG_HW_HS_DEST(dma_ch) |
DMA_CFG_PROTCTL | DMA_CFG_FCMOD_REQ);
out_le32(&(host_pvt.sata_dma_regs->chan_regs[dma_ch].cfg.low),
DMA_CFG_HW_CH_PRIOR(dma_ch));
/* Program the address of the linked list */
out_le32(&(host_pvt.sata_dma_regs->chan_regs[dma_ch].llp.low),
DMA_LLP_LMS(dma_lli, DMA_LLP_AHBMASTER2));
/* Program the CTL register with src enable / dst enable */
out_le32(&(host_pvt.sata_dma_regs->chan_regs[dma_ch].ctl.low),
DMA_CTL_LLP_SRCEN | DMA_CTL_LLP_DSTEN);
return dma_ch;
}
static int dma_dwc_xfer_setup(struct scatterlist *sg, int num_elems,
struct lli *lli, dma_addr_t dma_lli,
void __iomem *addr, int dir)
{
int dma_ch;
int num_lli;
dma_ch = dma_request_channel();
if (dma_ch == -1) {
dev_err(host_pvt.dwc_dev, "%s: dma channel unavailable\n",
__func__);
return -EAGAIN;
}
num_lli = map_sg_to_lli(sg, num_elems, lli, dma_lli, addr, dir);
dev_dbg(host_pvt.dwc_dev, "%s sg: 0x%p, count: %d lli: %p dma_lli:"
" 0x%0xlx addr: %p lli count: %d\n", __func__, sg, num_elems,
lli, (u32)dma_lli, addr, num_lli);
clear_chan_interrupts(dma_ch);
out_le32(&(host_pvt.sata_dma_regs->chan_regs[dma_ch].cfg.high),
DMA_CFG_PROTCTL | DMA_CFG_FCMOD_REQ);
out_le32(&(host_pvt.sata_dma_regs->chan_regs[dma_ch].cfg.low), 0);
out_le32(&(host_pvt.sata_dma_regs->chan_regs[dma_ch].llp.low),
DMA_LLP_LMS(dma_lli, DMA_LLP_AHBMASTER2));
out_le32(&(host_pvt.sata_dma_regs->chan_regs[dma_ch].ctl.low),
DMA_CTL_LLP_SRCEN | DMA_CTL_LLP_DSTEN);
return dma_ch;
}
