From af1a266670d040d2f4083ff309d732d648afba2a Mon Sep 17 00:00:00 2001
From: Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com>
Date: Tue, 10 Oct 2023 14:33:42 +0000
Subject: Add submodule dependency files
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
---
roms/u-boot/drivers/mmc/sti_sdhci.c | 150 ++++++++++++++++++++++++++++++++++++
1 file changed, 150 insertions(+)
create mode 100644 roms/u-boot/drivers/mmc/sti_sdhci.c
(limited to 'roms/u-boot/drivers/mmc/sti_sdhci.c')
diff --git a/roms/u-boot/drivers/mmc/sti_sdhci.c b/roms/u-boot/drivers/mmc/sti_sdhci.c
new file mode 100644
index 000000000..6194768fd
--- /dev/null
+++ b/roms/u-boot/drivers/mmc/sti_sdhci.c
@@ -0,0 +1,150 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
+ * Author(s): Patrice Chotard, <patrice.chotard@foss.st.com> for STMicroelectronics.
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <log.h>
+#include <mmc.h>
+#include <reset-uclass.h>
+#include <sdhci.h>
+#include <asm/arch/sdhci.h>
+#include <asm/global_data.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct sti_sdhci_plat {
+ struct mmc_config cfg;
+ struct mmc mmc;
+ struct reset_ctl reset;
+ int instance;
+};
+
+/**
+ * sti_mmc_core_config: configure the Arasan HC
+ * @dev : udevice
+ *
+ * Description: this function is to configure the Arasan MMC HC.
+ * This should be called when the system starts in case of, on the SoC,
+ * it is needed to configure the host controller.
+ * This happens on some SoCs, i.e. StiH410, where the MMC0 inside the flashSS
+ * needs to be configured as MMC 4.5 to have full capabilities.
+ * W/o these settings the SDHCI could configure and use the embedded controller
+ * with limited features.
+ */
+static int sti_mmc_core_config(struct udevice *dev)
+{
+ struct sti_sdhci_plat *plat = dev_get_plat(dev);
+ struct sdhci_host *host = dev_get_priv(dev);
+ int ret;
+
+ /* only MMC1 has a reset line */
+ if (plat->instance) {
+ ret = reset_deassert(&plat->reset);
+ if (ret < 0) {
+ pr_err("MMC1 deassert failed: %d", ret);
+ return ret;
+ }
+ }
+
+ writel(STI_FLASHSS_MMC_CORE_CONFIG_1,
+ host->ioaddr + FLASHSS_MMC_CORE_CONFIG_1);
+
+ if (plat->instance) {
+ writel(STI_FLASHSS_MMC_CORE_CONFIG2,
+ host->ioaddr + FLASHSS_MMC_CORE_CONFIG_2);
+ writel(STI_FLASHSS_MMC_CORE_CONFIG3,
+ host->ioaddr + FLASHSS_MMC_CORE_CONFIG_3);
+ } else {
+ writel(STI_FLASHSS_SDCARD_CORE_CONFIG2,
+ host->ioaddr + FLASHSS_MMC_CORE_CONFIG_2);
+ writel(STI_FLASHSS_SDCARD_CORE_CONFIG3,
+ host->ioaddr + FLASHSS_MMC_CORE_CONFIG_3);
+ }
+ writel(STI_FLASHSS_MMC_CORE_CONFIG4,
+ host->ioaddr + FLASHSS_MMC_CORE_CONFIG_4);
+
+ return 0;
+}
+
+static int sti_sdhci_probe(struct udevice *dev)
+{
+ struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+ struct sti_sdhci_plat *plat = dev_get_plat(dev);
+ struct sdhci_host *host = dev_get_priv(dev);
+ int ret;
+
+ /*
+ * identify current mmc instance, mmc1 has a reset, not mmc0
+ * MMC0 is wired to the SD slot,
+ * MMC1 is wired on the high speed connector
+ */
+ ret = reset_get_by_index(dev, 0, &plat->reset);
+ if (!ret)
+ plat->instance = 1;
+ else
+ if (ret == -ENOENT)
+ plat->instance = 0;
+ else
+ return ret;
+
+ ret = sti_mmc_core_config(dev);
+ if (ret)
+ return ret;
+
+ host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD |
+ SDHCI_QUIRK_32BIT_DMA_ADDR |
+ SDHCI_QUIRK_NO_HISPD_BIT;
+
+ host->host_caps = MMC_MODE_DDR_52MHz;
+ host->mmc = &plat->mmc;
+ host->mmc->dev = dev;
+ host->mmc->priv = host;
+
+ ret = sdhci_setup_cfg(&plat->cfg, host, 50000000, 400000);
+ if (ret)
+ return ret;
+
+ upriv->mmc = host->mmc;
+
+ return sdhci_probe(dev);
+}
+
+static int sti_sdhci_of_to_plat(struct udevice *dev)
+{
+ struct sdhci_host *host = dev_get_priv(dev);
+
+ host->name = strdup(dev->name);
+ host->ioaddr = dev_read_addr_ptr(dev);
+
+ host->bus_width = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
+ "bus-width", 4);
+
+ return 0;
+}
+
+static int sti_sdhci_bind(struct udevice *dev)
+{
+ struct sti_sdhci_plat *plat = dev_get_plat(dev);
+
+ return sdhci_bind(dev, &plat->mmc, &plat->cfg);
+}
+
+static const struct udevice_id sti_sdhci_ids[] = {
+ { .compatible = "st,sdhci" },
+ { }
+};
+
+U_BOOT_DRIVER(sti_mmc) = {
+ .name = "sti_sdhci",
+ .id = UCLASS_MMC,
+ .of_match = sti_sdhci_ids,
+ .bind = sti_sdhci_bind,
+ .ops = &sdhci_ops,
+ .of_to_plat = sti_sdhci_of_to_plat,
+ .probe = sti_sdhci_probe,
+ .priv_auto = sizeof(struct sdhci_host),
+ .plat_auto = sizeof(struct sti_sdhci_plat),
+};
--
cgit