/**
* ti_mmchs_intr_error - handles error interrupts
* @sc: pointer to the driver context
* @cmd: the command that was sent previously
* @stat_reg: the value that was in the status register
*
*
* LOCKING:
* Called from interrupt context
*
* RETURNS:
* Return value indicates if the transaction is complete, not done = 0, done != 0
*/
static int
ti_mmchs_intr_error(struct ti_mmchs_softc *sc, struct mmc_command *cmd,
uint32_t stat_reg)
{
ti_mmchs_dbg(sc, "error in xfer - stat 0x%08x\n", stat_reg);
/* Ignore CRC errors on CMD2 and ACMD47, per relevant standards */
if ((stat_reg & MMCHS_STAT_CCRC) && (cmd->opcode == MMC_SEND_OP_COND ||
cmd->opcode == ACMD_SD_SEND_OP_COND))
cmd->error = MMC_ERR_NONE;
else if (stat_reg & (MMCHS_STAT_CTO | MMCHS_STAT_DTO))
cmd->error = MMC_ERR_TIMEOUT;
else if (stat_reg & (MMCHS_STAT_CCRC | MMCHS_STAT_DCRC))
cmd->error = MMC_ERR_BADCRC;
else
cmd->error = MMC_ERR_FAILED;
/* If a dma transaction we should also stop the dma transfer */
if (ti_mmchs_read_4(sc, MMCHS_CMD) & MMCHS_CMD_DE) {
/* Abort the DMA transfer (DDIR bit tells direction) */
if (ti_mmchs_read_4(sc, MMCHS_CMD) & MMCHS_CMD_DDIR)
ti_sdma_stop_xfer(sc->sc_dmach_rd);
else
ti_sdma_stop_xfer(sc->sc_dmach_wr);
/* If an error occure abort the DMA operation and free the dma map */
if ((sc->sc_dmamapped > 0) && (cmd->error != MMC_ERR_NONE)) {
bus_dmamap_unload(sc->sc_dmatag, sc->sc_dmamap);
sc->sc_dmamapped--;
}
}
/* Command error occured? ... if so issue a soft reset for the cmd fsm */
if (stat_reg & (MMCHS_STAT_CCRC | MMCHS_STAT_CTO)) {
ti_mmchs_reset_controller(sc, MMCHS_SYSCTL_SRC);
}
/* Data error occured? ... if so issue a soft reset for the data line */
if (stat_reg & (MMCHS_STAT_DEB | MMCHS_STAT_DCRC | MMCHS_STAT_DTO)) {
ti_mmchs_reset_controller(sc, MMCHS_SYSCTL_SRD);
}
/* On any error the command is cancelled ... so we are done */
return 1;
}
/**
* ti_mmchs_intr_error - handles error interrupts
* @sc: pointer to the driver context
* @cmd: the command that was sent previously
* @stat_reg: the value that was in the status register
*
*
* LOCKING:
* Called from interrupt context
*
* RETURNS:
* Return value indicates if the transaction is complete, not done = 0, done != 0
*/
static int
ti_mmchs_intr_error(struct ti_mmchs_softc *sc, struct mmc_command *cmd,
uint32_t stat_reg)
{
ti_mmchs_dbg(sc, "error in xfer - stat 0x%08x\n", stat_reg);
/* Ignore CRC errors on CMD2 and ACMD47, per relevant standards */
if ((stat_reg & MMCHS_STAT_CCRC) && (cmd->opcode == MMC_SEND_OP_COND ||
cmd->opcode == ACMD_SD_SEND_OP_COND))
cmd->error = MMC_ERR_NONE;
else if (stat_reg & (MMCHS_STAT_CTO | MMCHS_STAT_DTO))
cmd->error = MMC_ERR_TIMEOUT;
else if (stat_reg & (MMCHS_STAT_CCRC | MMCHS_STAT_DCRC))
cmd->error = MMC_ERR_BADCRC;
else
cmd->error = MMC_ERR_FAILED;
/* If a dma transaction we should also stop the dma transfer */
if (ti_mmchs_read_4(sc, MMCHS_CMD) & MMCHS_CMD_DE) {
/* Abort the DMA transfer (DDIR bit tells direction) */
if (ti_mmchs_read_4(sc, MMCHS_CMD) & MMCHS_CMD_DDIR)
#ifdef SOC_TI_AM335X
printf("%s: DMA unimplemented\n", __func__);
#else
ti_sdma_stop_xfer(sc->sc_dmach_rd);
#endif
else
#ifdef SOC_TI_AM335X
printf("%s: DMA unimplemented\n", __func__);
#else
ti_sdma_stop_xfer(sc->sc_dmach_wr);
#endif
/* If an error occure abort the DMA operation and free the dma map */
if ((sc->sc_dmamapped > 0) && (cmd->error != MMC_ERR_NONE)) {
bus_dmamap_unload(sc->sc_dmatag, sc->sc_dmamap);
sc->sc_dmamapped--;
}
}
