static void meson_nfc_cmd_access(struct nand_chip *nand, int raw, bool dir,
int scrambler)
{
struct mtd_info *mtd = nand_to_mtd(nand);
struct meson_nfc *nfc = nand_get_controller_data(mtd_to_nand(mtd));
struct meson_nfc_nand_chip *meson_chip = to_meson_nand(nand);
u32 bch = meson_chip->bch_mode, cmd;
int len = mtd->writesize, pagesize, pages;
pagesize = nand->ecc.size;
if (raw) {
len = mtd->writesize + mtd->oobsize;
cmd = (len & GENMASK(5, 0)) | scrambler | DMA_DIR(dir);
writel(cmd, nfc->reg_base + NFC_REG_CMD);
return;
}
pages = len / nand->ecc.size;
cmd = CMDRWGEN(DMA_DIR(dir), scrambler, bch,
NFC_CMD_SHORTMODE_DISABLE, pagesize, pages);
writel(cmd, nfc->reg_base + NFC_REG_CMD);
}
static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
int status)
{
struct ip22_hostdata *hdata = host_to_hostdata(instance);
struct hpc3_scsiregs *hregs;
if (!SCpnt)
return;
if (SCpnt->SCp.ptr == NULL || SCpnt->SCp.this_residual == 0)
return;
hregs = (struct hpc3_scsiregs *) SCpnt->device->host->base;
pr_debug("dma_stop: status<%d> ", status);
/* First stop the HPC and flush it's FIFO. */
if (hdata->wh.dma_dir) {
hregs->ctrl |= HPC3_SCTRL_FLUSH;
while (hregs->ctrl & HPC3_SCTRL_ACTIVE)
barrier();
}
hregs->ctrl = 0;
dma_unmap_single(hdata->dev, SCpnt->SCp.dma_handle,
SCpnt->SCp.this_residual,
DMA_DIR(hdata->wh.dma_dir));
pr_debug("\n");
}
static inline
void fill_hpc_entries(struct ip22_hostdata *hd, struct scsi_cmnd *cmd, int din)
{
unsigned long len = cmd->SCp.this_residual;
void *addr = cmd->SCp.ptr;
dma_addr_t physaddr;
unsigned long count;
struct hpc_chunk *hcp;
physaddr = dma_map_single(hd->dev, addr, len, DMA_DIR(din));
cmd->SCp.dma_handle = physaddr;
hcp = hd->cpu;
while (len) {
/*
* even cntinfo could be up to 16383, without
* magic only 8192 works correctly
*/
count = len > 8192 ? 8192 : len;
hcp->desc.pbuf = physaddr;
hcp->desc.cntinfo = count;
hcp++;
len -= count;
physaddr += count;
}
/*
* To make sure, if we trip an HPC bug, that we transfer every single
* byte, we tag on an extra zero length dma descriptor at the end of
* the chain.
*/
hcp->desc.pbuf = 0;
hcp->desc.cntinfo = HPCDMA_EOX;
dma_cache_sync(hd->dev, hd->cpu,
(unsigned long)(hcp + 1) - (unsigned long)hd->cpu,
DMA_TO_DEVICE);
}
