u32 val;
sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_RST);
- while (readl(host->base + MSDC_CFG) & MSDC_CFG_RST)
- cpu_relax();
+ readl_poll_timeout(host->base + MSDC_CFG, val, !(val & MSDC_CFG_RST), 0, 0);
sdr_set_bits(host->base + MSDC_FIFOCS, MSDC_FIFOCS_CLR);
- while (readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_CLR)
- cpu_relax();
+ readl_poll_timeout(host->base + MSDC_FIFOCS, val,
+ !(val & MSDC_FIFOCS_CLR), 0, 0);
val = readl(host->base + MSDC_INT);
writel(val, host->base + MSDC_INT);
clk_disable_unprepare(host->h_clk);
}
-static void msdc_ungate_clock(struct msdc_host *host)
+static int msdc_ungate_clock(struct msdc_host *host)
{
+ u32 val;
int ret;
clk_prepare_enable(host->h_clk);
ret = clk_bulk_prepare_enable(MSDC_NR_CLOCKS, host->bulk_clks);
if (ret) {
dev_err(host->dev, "Cannot enable pclk/axi/ahb clock gates\n");
- return;
+ return ret;
}
- while (!(readl(host->base + MSDC_CFG) & MSDC_CFG_CKSTB))
- cpu_relax();
+ return readl_poll_timeout(host->base + MSDC_CFG, val,
+ (val & MSDC_CFG_CKSTB), 1, 20000);
}
static void msdc_set_mclk(struct msdc_host *host, unsigned char timing, u32 hz)
u32 div;
u32 sclk;
u32 tune_reg = host->dev_comp->pad_tune_reg;
+ u32 val;
if (!hz) {
dev_dbg(host->dev, "set mclk to 0\n");
else
clk_prepare_enable(clk_get_parent(host->src_clk));
- while (!(readl(host->base + MSDC_CFG) & MSDC_CFG_CKSTB))
- cpu_relax();
+ readl_poll_timeout(host->base + MSDC_CFG, val, (val & MSDC_CFG_CKSTB), 0, 0);
sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_CKPDN);
mmc->actual_clock = sclk;
host->mclk = hz;
static inline bool msdc_cmd_is_ready(struct msdc_host *host,
struct mmc_request *mrq, struct mmc_command *cmd)
{
- /* The max busy time we can endure is 20ms */
- unsigned long tmo = jiffies + msecs_to_jiffies(20);
+ u32 val;
+ int ret;
- while ((readl(host->base + SDC_STS) & SDC_STS_CMDBUSY) &&
- time_before(jiffies, tmo))
- cpu_relax();
- if (readl(host->base + SDC_STS) & SDC_STS_CMDBUSY) {
+ /* The max busy time we can endure is 20ms */
+ ret = readl_poll_timeout_atomic(host->base + SDC_STS, val,
+ !(val & SDC_STS_CMDBUSY), 1, 20000);
+ if (ret) {
dev_err(host->dev, "CMD bus busy detected\n");
host->error |= REQ_CMD_BUSY;
msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd);
}
if (mmc_resp_type(cmd) == MMC_RSP_R1B || cmd->data) {
- tmo = jiffies + msecs_to_jiffies(20);
/* R1B or with data, should check SDCBUSY */
- while ((readl(host->base + SDC_STS) & SDC_STS_SDCBUSY) &&
- time_before(jiffies, tmo))
- cpu_relax();
- if (readl(host->base + SDC_STS) & SDC_STS_SDCBUSY) {
+ ret = readl_poll_timeout_atomic(host->base + SDC_STS, val,
+ !(val & SDC_STS_SDCBUSY), 1, 20000);
+ if (ret) {
dev_err(host->dev, "Controller busy detected\n");
host->error |= REQ_CMD_BUSY;
msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd);
(MSDC_INT_XFER_COMPL | MSDC_INT_DATCRCERR | MSDC_INT_DATTMO
| MSDC_INT_DMA_BDCSERR | MSDC_INT_DMA_GPDCSERR
| MSDC_INT_DMA_PROTECT);
+ u32 val;
+ int ret;
spin_lock_irqsave(&host->lock, flags);
done = !host->data;
readl(host->base + MSDC_DMA_CFG));
sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_STOP,
1);
- while (readl(host->base + MSDC_DMA_CFG) & MSDC_DMA_CFG_STS)
- cpu_relax();
+
+ ret = readl_poll_timeout_atomic(host->base + MSDC_DMA_CFG, val,
+ !(val & MSDC_DMA_CFG_STS), 1, 20000);
+ if (ret) {
+ dev_dbg(host->dev, "DMA stop timed out\n");
+ return false;
+ }
+
sdr_clr_bits(host->base + MSDC_INTEN, data_ints_mask);
dev_dbg(host->dev, "DMA stop\n");
spin_lock_init(&host->lock);
platform_set_drvdata(pdev, mmc);
- msdc_ungate_clock(host);
+ ret = msdc_ungate_clock(host);
+ if (ret) {
+ dev_err(&pdev->dev, "Cannot ungate clocks!\n");
+ goto release_mem;
+ }
msdc_init_hw(host);
if (mmc->caps2 & MMC_CAP2_CQE) {
{
struct mmc_host *mmc = dev_get_drvdata(dev);
struct msdc_host *host = mmc_priv(mmc);
+ int ret;
+
+ ret = msdc_ungate_clock(host);
+ if (ret)
+ return ret;
- msdc_ungate_clock(host);
msdc_restore_reg(host);
return 0;
}