dm: mmc: Implement the MMC functions for block devices

Implement the functions in mmc_legacy.c for driver-model block devices, so
that MMC can use driver model for these. This allows CONFIG_BLK to be enabled
with DM_MMC.

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/mmc/Makefile

@@ -5,7 +5,9 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-obj-$(CONFIG_DM_MMC) += mmc-uclass.o
+ifdef CONFIG_DM_MMC
+obj-$(CONFIG_GENERIC_MMC) += mmc-uclass.o
+endif
 
 ifndef CONFIG_BLK
 obj-$(CONFIG_GENERIC_MMC) += mmc_legacy.o

drivers/mmc/mmc-uclass.c

@@ -21,6 +21,112 @@ struct mmc *mmc_get_mmc_dev(struct udevice *dev)
 	return upriv->mmc;
 }
 
+#ifdef CONFIG_BLK
+struct mmc *find_mmc_device(int dev_num)
+{
+	struct udevice *dev, *mmc_dev;
+	int ret;
+
+	ret = blk_get_device(IF_TYPE_MMC, dev_num, &dev);
+
+	if (ret) {
+#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
+		printf("MMC Device %d not found\n", dev_num);
+#endif
+		return NULL;
+	}
+
+	mmc_dev = dev_get_parent(dev);
+
+	return mmc_get_mmc_dev(mmc_dev);
+}
+
+int get_mmc_num(void)
+{
+	return max(blk_find_max_devnum(IF_TYPE_MMC), 0);
+}
+
+int mmc_get_next_devnum(void)
+{
+	int ret;
+
+	ret = get_mmc_num();
+	if (ret < 0)
+		return ret;
+
+	return ret + 1;
+}
+
+struct blk_desc *mmc_get_blk_desc(struct mmc *mmc)
+{
+	struct blk_desc *desc;
+	struct udevice *dev;
+
+	device_find_first_child(mmc->dev, &dev);
+	if (!dev)
+		return NULL;
+	desc = dev_get_uclass_platdata(dev);
+
+	return desc;
+}
+
+void mmc_do_preinit(void)
+{
+	struct udevice *dev;
+	struct uclass *uc;
+	int ret;
+
+	ret = uclass_get(UCLASS_MMC, &uc);
+	if (ret)
+		return;
+	uclass_foreach_dev(dev, uc) {
+		struct mmc *m = mmc_get_mmc_dev(dev);
+
+		if (!m)
+			continue;
+#ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
+		mmc_set_preinit(m, 1);
+#endif
+		if (m->preinit)
+			mmc_start_init(m);
+	}
+}
+
+#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
+void print_mmc_devices(char separator)
+{
+	struct udevice *dev;
+	char *mmc_type;
+	bool first = true;
+
+	for (uclass_first_device(UCLASS_MMC, &dev);
+	     dev;
+	     uclass_next_device(&dev)) {
+		struct mmc *m = mmc_get_mmc_dev(dev);
+
+		if (!first) {
+			printf("%c", separator);
+			if (separator != '\n')
+				puts(" ");
+		}
+		if (m->has_init)
+			mmc_type = IS_SD(m) ? "SD" : "eMMC";
+		else
+			mmc_type = NULL;
+
+		printf("%s: %d", m->cfg->name, mmc_get_blk_desc(m)->devnum);
+		if (mmc_type)
+			printf(" (%s)", mmc_type);
+	}
+
+	printf("\n");
+}
+
+#else
+void print_mmc_devices(char separator) { }
+#endif
+#endif /* CONFIG_BLK */
+
 U_BOOT_DRIVER(mmc) = {
 	.name	= "mmc",
 	.id	= UCLASS_MMC,