void *clk_of_data;
};
- struct sdhci_arasan_zynqmp_clk_data {
- const struct zynqmp_eemi_ops *eemi_ops;
- };
-
/**
- * struct sdhci_arasan_data
+ * struct sdhci_arasan_data - Arasan Controller Data
+ *
* @host: Pointer to the main SDHCI host structure.
* @clk_ahb: Pointer to the AHB clock
* @phy: Pointer to the generic phy
.set_phase = sdhci_zynqmp_sampleclk_set_phase,
};
+/**
+ * sdhci_versal_sdcardclk_set_phase - Set the SD Output Clock Tap Delays
+ *
+ * @hw: Pointer to the hardware clock structure.
+ * @degrees: The clock phase shift between 0 - 359.
+ *
+ * Set the SD Output Clock Tap Delays for Output path
+ *
+ * Return: 0 on success and error value on error
+ */
+static int sdhci_versal_sdcardclk_set_phase(struct clk_hw *hw, int degrees)
+{
+ struct sdhci_arasan_clk_data *clk_data =
+ container_of(hw, struct sdhci_arasan_clk_data, sdcardclk_hw);
+ struct sdhci_arasan_data *sdhci_arasan =
+ container_of(clk_data, struct sdhci_arasan_data, clk_data);
+ struct sdhci_host *host = sdhci_arasan->host;
+ u8 tap_delay, tap_max = 0;
+
+ /*
+ * This is applicable for SDHCI_SPEC_300 and above
+ * Versal does not set phase for <=25MHz clock.
+ * If degrees is zero, no need to do anything.
+ */
+ if (host->version < SDHCI_SPEC_300 ||
+ host->timing == MMC_TIMING_LEGACY ||
+ host->timing == MMC_TIMING_UHS_SDR12 || !degrees)
+ return 0;
+
+ switch (host->timing) {
+ case MMC_TIMING_MMC_HS:
+ case MMC_TIMING_SD_HS:
+ case MMC_TIMING_UHS_SDR25:
+ case MMC_TIMING_UHS_DDR50:
+ case MMC_TIMING_MMC_DDR52:
+ /* For 50MHz clock, 30 Taps are available */
+ tap_max = 30;
+ break;
+ case MMC_TIMING_UHS_SDR50:
+ /* For 100MHz clock, 15 Taps are available */
+ tap_max = 15;
+ break;
+ case MMC_TIMING_UHS_SDR104:
+ case MMC_TIMING_MMC_HS200:
+ /* For 200MHz clock, 8 Taps are available */
+ tap_max = 8;
+ default:
+ break;
+ }
+
+ tap_delay = (degrees * tap_max) / 360;
+
+ /* Set the Clock Phase */
+ if (tap_delay) {
+ u32 regval;
+
+ regval = sdhci_readl(host, SDHCI_ARASAN_OTAPDLY_REGISTER);
+ regval |= SDHCI_OTAPDLY_ENABLE;
+ sdhci_writel(host, regval, SDHCI_ARASAN_OTAPDLY_REGISTER);
+ regval |= tap_delay;
+ sdhci_writel(host, regval, SDHCI_ARASAN_OTAPDLY_REGISTER);
+ }
+
+ return 0;
+}
+
+static const struct clk_ops versal_sdcardclk_ops = {
+ .recalc_rate = sdhci_arasan_sdcardclk_recalc_rate,
+ .set_phase = sdhci_versal_sdcardclk_set_phase,
+};
+
+/**
+ * sdhci_versal_sampleclk_set_phase - Set the SD Input Clock Tap Delays
+ *
+ * @hw: Pointer to the hardware clock structure.
+ * @degrees: The clock phase shift between 0 - 359.
+ *
+ * Set the SD Input Clock Tap Delays for Input path
+ *
+ * Return: 0 on success and error value on error
+ */
+static int sdhci_versal_sampleclk_set_phase(struct clk_hw *hw, int degrees)
+{
+ struct sdhci_arasan_clk_data *clk_data =
+ container_of(hw, struct sdhci_arasan_clk_data, sampleclk_hw);
+ struct sdhci_arasan_data *sdhci_arasan =
+ container_of(clk_data, struct sdhci_arasan_data, clk_data);
+ struct sdhci_host *host = sdhci_arasan->host;
+ u8 tap_delay, tap_max = 0;
+
+ /*
+ * This is applicable for SDHCI_SPEC_300 and above
+ * Versal does not set phase for <=25MHz clock.
+ * If degrees is zero, no need to do anything.
+ */
+ if (host->version < SDHCI_SPEC_300 ||
+ host->timing == MMC_TIMING_LEGACY ||
+ host->timing == MMC_TIMING_UHS_SDR12 || !degrees)
+ return 0;
+
+ switch (host->timing) {
+ case MMC_TIMING_MMC_HS:
+ case MMC_TIMING_SD_HS:
+ case MMC_TIMING_UHS_SDR25:
+ case MMC_TIMING_UHS_DDR50:
+ case MMC_TIMING_MMC_DDR52:
+ /* For 50MHz clock, 120 Taps are available */
+ tap_max = 120;
+ break;
+ case MMC_TIMING_UHS_SDR50:
+ /* For 100MHz clock, 60 Taps are available */
+ tap_max = 60;
+ break;
+ case MMC_TIMING_UHS_SDR104:
+ case MMC_TIMING_MMC_HS200:
+ /* For 200MHz clock, 30 Taps are available */
+ tap_max = 30;
+ default:
+ break;
+ }
+
+ tap_delay = (degrees * tap_max) / 360;
+
+ /* Set the Clock Phase */
+ if (tap_delay) {
+ u32 regval;
+
+ regval = sdhci_readl(host, SDHCI_ARASAN_ITAPDLY_REGISTER);
+ regval |= SDHCI_ITAPDLY_CHGWIN;
+ sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
+ regval |= SDHCI_ITAPDLY_ENABLE;
+ sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
+ regval |= tap_delay;
+ sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
+ regval &= ~SDHCI_ITAPDLY_CHGWIN;
+ sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
+ }
+
+ return 0;
+}
+
+static const struct clk_ops versal_sampleclk_ops = {
+ .recalc_rate = sdhci_arasan_sampleclk_recalc_rate,
+ .set_phase = sdhci_versal_sampleclk_set_phase,
+};
+
static void arasan_zynqmp_dll_reset(struct sdhci_host *host, u32 deviceid)
{
- struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
- struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
- struct sdhci_arasan_zynqmp_clk_data *zynqmp_clk_data =
- sdhci_arasan->clk_data.clk_of_data;
- const struct zynqmp_eemi_ops *eemi_ops = zynqmp_clk_data->eemi_ops;
u16 clk;
clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);