Hi, I remembered that this patch was pushed at Ulf's tree. Since dw_mci_idmac_reset() is located into #if CONFIG_MMC_DW_IDMAC, it occurred the compiler error. And it seems that didn't need to use "IS_ENABLED()" at there. Acked-by: Jaehoon Chung <jh80.chung@xxxxxxxxxxx> Best Regards, Jaehoon Chung On 08/05/2014 10:19 AM, Sonny Rao wrote: > This patch changes the fifo reset code to follow the reset procedure > outlined in the documentation of Synopsys Mobile storage host databook. > > Signed-off-by: Sonny Rao <sonnyrao@xxxxxxxxxxxx> > Signed-off-by: Yuvaraj Kumar C D <yuvaraj.cd@xxxxxxxxxxx> > Acked-by: Seungwon Jeon <tgih.jun@xxxxxxxxxxx> > Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> > [sonnyrao: fix compile for !CONFIG_MMC_DW_IDMAC case] > --- > drivers/mmc/host/dw_mmc.c | 87 ++++++++++++++++++++++++++++++++++------------- > drivers/mmc/host/dw_mmc.h | 5 +++ > 2 files changed, 69 insertions(+), 23 deletions(-) > > diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c > index 1ac227c..39cf54f 100644 > --- a/drivers/mmc/host/dw_mmc.c > +++ b/drivers/mmc/host/dw_mmc.c > @@ -111,8 +111,7 @@ static const u8 tuning_blk_pattern_8bit[] = { > 0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, > }; > > -static inline bool dw_mci_fifo_reset(struct dw_mci *host); > -static inline bool dw_mci_ctrl_all_reset(struct dw_mci *host); > +static bool dw_mci_reset(struct dw_mci *host); > > #if defined(CONFIG_DEBUG_FS) > static int dw_mci_req_show(struct seq_file *s, void *v) > @@ -1235,7 +1234,7 @@ static int dw_mci_data_complete(struct dw_mci *host, struct mmc_data *data) > * After an error, there may be data lingering > * in the FIFO > */ > - dw_mci_fifo_reset(host); > + dw_mci_reset(host); > } else { > data->bytes_xfered = data->blocks * data->blksz; > data->error = 0; > @@ -1352,7 +1351,7 @@ static void dw_mci_tasklet_func(unsigned long priv) > > /* CMD error in data command */ > if (mrq->cmd->error && mrq->data) > - dw_mci_fifo_reset(host); > + dw_mci_reset(host); > > host->cmd = NULL; > host->data = NULL; > @@ -1963,14 +1962,8 @@ static void dw_mci_work_routine_card(struct work_struct *work) > } > > /* Power down slot */ > - if (present == 0) { > - /* Clear down the FIFO */ > - dw_mci_fifo_reset(host); > -#ifdef CONFIG_MMC_DW_IDMAC > - dw_mci_idmac_reset(host); > -#endif > - > - } > + if (present == 0) > + dw_mci_reset(host); > > spin_unlock_bh(&host->lock); > > @@ -2208,8 +2201,11 @@ static bool dw_mci_ctrl_reset(struct dw_mci *host, u32 reset) > return false; > } > > -static inline bool dw_mci_fifo_reset(struct dw_mci *host) > +static bool dw_mci_reset(struct dw_mci *host) > { > + u32 flags = SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET; > + bool ret = false; > + > /* > * Reseting generates a block interrupt, hence setting > * the scatter-gather pointer to NULL. > @@ -2219,15 +2215,60 @@ static inline bool dw_mci_fifo_reset(struct dw_mci *host) > host->sg = NULL; > } > > - return dw_mci_ctrl_reset(host, SDMMC_CTRL_FIFO_RESET); > -} > + if (host->use_dma) > + flags |= SDMMC_CTRL_DMA_RESET; > > -static inline bool dw_mci_ctrl_all_reset(struct dw_mci *host) > -{ > - return dw_mci_ctrl_reset(host, > - SDMMC_CTRL_FIFO_RESET | > - SDMMC_CTRL_RESET | > - SDMMC_CTRL_DMA_RESET); > + if (dw_mci_ctrl_reset(host, flags)) { > + /* > + * In all cases we clear the RAWINTS register to clear any > + * interrupts. > + */ > + mci_writel(host, RINTSTS, 0xFFFFFFFF); > + > + /* if using dma we wait for dma_req to clear */ > + if (host->use_dma) { > + unsigned long timeout = jiffies + msecs_to_jiffies(500); > + u32 status; > + do { > + status = mci_readl(host, STATUS); > + if (!(status & SDMMC_STATUS_DMA_REQ)) > + break; > + cpu_relax(); > + } while (time_before(jiffies, timeout)); > + > + if (status & SDMMC_STATUS_DMA_REQ) { > + dev_err(host->dev, > + "%s: Timeout waiting for dma_req to " > + "clear during reset\n", __func__); > + goto ciu_out; > + } > + > + /* when using DMA next we reset the fifo again */ > + if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_FIFO_RESET)) > + goto ciu_out; > + } > + } else { > + /* if the controller reset bit did clear, then set clock regs */ > + if (!(mci_readl(host, CTRL) & SDMMC_CTRL_RESET)) { > + dev_err(host->dev, "%s: fifo/dma reset bits didn't " > + "clear but ciu was reset, doing clock update\n", > + __func__); > + goto ciu_out; > + } > + } > + > +#if IS_ENABLED(CONFIG_MMC_DW_IDMAC) > + /* It is also recommended that we reset and reprogram idmac */ > + dw_mci_idmac_reset(host); > +#endif > + > + ret = true; > + > +ciu_out: > + /* After a CTRL reset we need to have CIU set clock registers */ > + mci_send_cmd(host->cur_slot, SDMMC_CMD_UPD_CLK, 0); > + > + return ret; > } > > #ifdef CONFIG_OF > @@ -2425,7 +2466,7 @@ int dw_mci_probe(struct dw_mci *host) > } > > /* Reset all blocks */ > - if (!dw_mci_ctrl_all_reset(host)) > + if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) > return -ENODEV; > > host->dma_ops = host->pdata->dma_ops; > @@ -2612,7 +2653,7 @@ int dw_mci_resume(struct dw_mci *host) > } > } > > - if (!dw_mci_ctrl_all_reset(host)) { > + if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) { > ret = -ENODEV; > return ret; > } > diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h > index 738fa24..08fd956 100644 > --- a/drivers/mmc/host/dw_mmc.h > +++ b/drivers/mmc/host/dw_mmc.h > @@ -129,6 +129,7 @@ > #define SDMMC_CMD_INDX(n) ((n) & 0x1F) > /* Status register defines */ > #define SDMMC_GET_FCNT(x) (((x)>>17) & 0x1FFF) > +#define SDMMC_STATUS_DMA_REQ BIT(31) > /* FIFOTH register defines */ > #define SDMMC_SET_FIFOTH(m, r, t) (((m) & 0x7) << 28 | \ > ((r) & 0xFFF) << 16 | \ > @@ -150,6 +151,10 @@ > /* Card read threshold */ > #define SDMMC_SET_RD_THLD(v, x) (((v) & 0x1FFF) << 16 | (x)) > > +/* All ctrl reset bits */ > +#define SDMMC_CTRL_ALL_RESET_FLAGS \ > + (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | SDMMC_CTRL_DMA_RESET) > + > /* Register access macros */ > #define mci_readl(dev, reg) \ > __raw_readl((dev)->regs + SDMMC_##reg) > -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html