openwrt/package/boot/uboot-d1/patches/0017-sunxi-mmc-group-non-DM-specific-functions.patch

From 74afc3a4e0ff780eddd859a25de7142e4baeeed5 Mon Sep 17 00:00:00 2001
From: Andre Przywara <[email protected]>
Date: Wed, 13 Jul 2022 17:21:44 +0100
Subject: [PATCH 17/90] sunxi: mmc: group non-DM specific functions

As the SPL code for sunxi boards does not use the driver model, we have
two mmc_ops structures, one for DM, one for non-DM. The actual hardware
access code is shared, with the respective callback functions using that
common code.

To make this more obvious and easier to read, reorder the functions to
group them: we first have the common code, then the non-DM bits, and
the proper DM implementation at the end.
Also document this structure in the comment at the beginning of the file.

No functional change intended.

Signed-off-by: Andre Przywara <[email protected]>
---
 drivers/mmc/sunxi_mmc.c | 117 +++++++++++++++++++++-------------------
 1 file changed, 61 insertions(+), 56 deletions(-)

--- a/drivers/mmc/sunxi_mmc.c
+++ b/drivers/mmc/sunxi_mmc.c
@@ -5,6 +5,12 @@
  * Aaron <[email protected]>
  *
  * MMC driver for allwinner sunxi platform.
+ *
+ * This driver is used by the (ARM) SPL with the legacy MMC interface, and
+ * by U-Boot proper using the full DM interface. The actual hardware access
+ * code is common, and comes first in this file.
+ * The legacy MMC interface implementation comes next, followed by the
+ * proper DM_MMC implementation at the end.
  */
 
 #include <common.h>
@@ -40,48 +46,6 @@ struct sunxi_mmc_priv {
 	struct mmc_config cfg;
 };
 
-#if !CONFIG_IS_ENABLED(DM_MMC)
-/* support 4 mmc hosts */
-struct sunxi_mmc_priv mmc_host[4];
-
-static int mmc_resource_init(int sdc_no)
-{
-	struct sunxi_mmc_priv *priv = &mmc_host[sdc_no];
-	struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
-
-	debug("init mmc %d resource\n", sdc_no);
-
-	switch (sdc_no) {
-	case 0:
-		priv->reg = (struct sunxi_mmc *)SUNXI_MMC0_BASE;
-		priv->mclkreg = &ccm->sd0_clk_cfg;
-		break;
-	case 1:
-		priv->reg = (struct sunxi_mmc *)SUNXI_MMC1_BASE;
-		priv->mclkreg = &ccm->sd1_clk_cfg;
-		break;
-#ifdef SUNXI_MMC2_BASE
-	case 2:
-		priv->reg = (struct sunxi_mmc *)SUNXI_MMC2_BASE;
-		priv->mclkreg = &ccm->sd2_clk_cfg;
-		break;
-#endif
-#ifdef SUNXI_MMC3_BASE
-	case 3:
-		priv->reg = (struct sunxi_mmc *)SUNXI_MMC3_BASE;
-		priv->mclkreg = &ccm->sd3_clk_cfg;
-		break;
-#endif
-	default:
-		printf("Wrong mmc number %d\n", sdc_no);
-		return -1;
-	}
-	priv->mmc_no = sdc_no;
-
-	return 0;
-}
-#endif
-
 /*
  * All A64 and later MMC controllers feature auto-calibration. This would
  * normally be detected via the compatible string, but we need something
@@ -269,19 +233,6 @@ static int sunxi_mmc_set_ios_common(stru
 	return 0;
 }
 
-#if !CONFIG_IS_ENABLED(DM_MMC)
-static int sunxi_mmc_core_init(struct mmc *mmc)
-{
-	struct sunxi_mmc_priv *priv = mmc->priv;
-
-	/* Reset controller */
-	writel(SUNXI_MMC_GCTRL_RESET, &priv->reg->gctrl);
-	udelay(1000);
-
-	return 0;
-}
-#endif
-
 static int mmc_trans_data_by_cpu(struct sunxi_mmc_priv *priv, struct mmc *mmc,
 				 struct mmc_data *data)
 {
@@ -486,7 +437,60 @@ out:
 	return error;
 }
 
+/* non-DM code here is used by the (ARM) SPL only */
+
 #if !CONFIG_IS_ENABLED(DM_MMC)
+/* support 4 mmc hosts */
+struct sunxi_mmc_priv mmc_host[4];
+
+static int mmc_resource_init(int sdc_no)
+{
+	struct sunxi_mmc_priv *priv = &mmc_host[sdc_no];
+	struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
+
+	debug("init mmc %d resource\n", sdc_no);
+
+	switch (sdc_no) {
+	case 0:
+		priv->reg = (struct sunxi_mmc *)SUNXI_MMC0_BASE;
+		priv->mclkreg = &ccm->sd0_clk_cfg;
+		break;
+	case 1:
+		priv->reg = (struct sunxi_mmc *)SUNXI_MMC1_BASE;
+		priv->mclkreg = &ccm->sd1_clk_cfg;
+		break;
+#ifdef SUNXI_MMC2_BASE
+	case 2:
+		priv->reg = (struct sunxi_mmc *)SUNXI_MMC2_BASE;
+		priv->mclkreg = &ccm->sd2_clk_cfg;
+		break;
+#endif
+#ifdef SUNXI_MMC3_BASE
+	case 3:
+		priv->reg = (struct sunxi_mmc *)SUNXI_MMC3_BASE;
+		priv->mclkreg = &ccm->sd3_clk_cfg;
+		break;
+#endif
+	default:
+		printf("Wrong mmc number %d\n", sdc_no);
+		return -1;
+	}
+	priv->mmc_no = sdc_no;
+
+	return 0;
+}
+
+static int sunxi_mmc_core_init(struct mmc *mmc)
+{
+	struct sunxi_mmc_priv *priv = mmc->priv;
+
+	/* Reset controller */
+	writel(SUNXI_MMC_GCTRL_RESET, &priv->reg->gctrl);
+	udelay(1000);
+
+	return 0;
+}
+
 static int sunxi_mmc_set_ios_legacy(struct mmc *mmc)
 {
 	struct sunxi_mmc_priv *priv = mmc->priv;
@@ -562,7 +566,8 @@ struct mmc *sunxi_mmc_init(int sdc_no)
 
 	return mmc_create(cfg, priv);
 }
-#else
+
+#else /* CONFIG_DM_MMC code below, as used by U-Boot proper */
 
 static int sunxi_mmc_set_ios(struct udevice *dev)
 {