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Sat, 09 Mar 2024 09:53:49 -0800 (PST) Received: from localhost.localdomain ([117.135.91.249]) by smtp.gmail.com with ESMTPSA id e2-20020a631e02000000b005d7994a08dcsm1530651pge.36.2024.03.09.09.53.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 09 Mar 2024 09:53:49 -0800 (PST) From: Kongyang Liu To: u-boot@lists.denx.de Cc: Jaehoon Chung , Kever Yang , Marek Vasut , Oleksandr Suvorov , Paul Barker , Peng Fan , Peter Geis , Stefan Roese , Tom Rini Subject: [PATCH v2 1/3] mmc: cv1800b: Add sdhci driver support for cv1800b SoC Date: Sun, 10 Mar 2024 01:51:55 +0800 Message-ID: <20240309175330.79267-2-seashell11234455@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20240309175330.79267-1-seashell11234455@gmail.com> References: <20240309175330.79267-1-seashell11234455@gmail.com> MIME-Version: 1.0 X-Mailman-Approved-At: Sat, 09 Mar 2024 22:59:37 +0100 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean Add sdhci driver for cv1800b SoC. Signed-off-by: Kongyang Liu Reviewed-by: Leo Yu-Chi Liang --- Changes in v2: - Refactored and simplified some of the code. drivers/mmc/Kconfig | 13 ++++ drivers/mmc/Makefile | 1 + drivers/mmc/cv1800b_sdhci.c | 116 ++++++++++++++++++++++++++++++++++++ 3 files changed, 130 insertions(+) create mode 100644 drivers/mmc/cv1800b_sdhci.c diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index cef05790dd..f7fe6d1042 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -568,6 +568,19 @@ config MMC_SDHCI_CADENCE If unsure, say N. +config MMC_SDHCI_CV1800B + bool "SDHCI support for the CV1800B SD/SDIO/eMMC controller" + depends on BLK && DM_MMC + depends on MMC_SDHCI + depends on OF_CONTROL + help + This selects the CV1800B SD/SDIO/eMMC driver. + + If you have a controller with this interface, + say Y here. + + If unsure, say N. + config MMC_SDHCI_AM654 bool "SDHCI Controller on TI's Am654 devices" depends on ARCH_K3 diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile index e9cf1fcc64..3374321e29 100644 --- a/drivers/mmc/Makefile +++ b/drivers/mmc/Makefile @@ -60,6 +60,7 @@ obj-$(CONFIG_MMC_SDHCI_ATMEL) += atmel_sdhci.o obj-$(CONFIG_MMC_SDHCI_BCM2835) += bcm2835_sdhci.o obj-$(CONFIG_MMC_SDHCI_BCMSTB) += bcmstb_sdhci.o obj-$(CONFIG_MMC_SDHCI_CADENCE) += sdhci-cadence.o +obj-$(CONFIG_MMC_SDHCI_CV1800B) += cv1800b_sdhci.o obj-$(CONFIG_MMC_SDHCI_AM654) += am654_sdhci.o obj-$(CONFIG_MMC_SDHCI_IPROC) += iproc_sdhci.o obj-$(CONFIG_MMC_SDHCI_KONA) += kona_sdhci.o diff --git a/drivers/mmc/cv1800b_sdhci.c b/drivers/mmc/cv1800b_sdhci.c new file mode 100644 index 0000000000..2275c53777 --- /dev/null +++ b/drivers/mmc/cv1800b_sdhci.c @@ -0,0 +1,116 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2024, Kongyang Liu + */ + +#include +#include +#include +#include + +#define SDHCI_PHY_TX_RX_DLY 0x240 +#define MMC_MAX_CLOCK 375000000 +#define TUNE_MAX_PHCODE 128 + +struct cv1800b_sdhci_plat { + struct mmc_config cfg; + struct mmc mmc; +}; + +static void cv1800b_set_tap_delay(struct sdhci_host *host, u16 tap) +{ + sdhci_writel(host, tap << 16, SDHCI_PHY_TX_RX_DLY); +} + +static void cv1800b_sdhci_reset(struct sdhci_host *host, u8 mask) +{ + sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET); + while (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) + udelay(10); +} + +static int cv1800b_execute_tuning(struct mmc *mmc, u8 opcode) +{ + struct sdhci_host *host = dev_get_priv(mmc->dev); + + u16 tap; + + int current_size = 0; + int max_size = 0; + int max_window = 0; + + for (tap = 0; tap < TUNE_MAX_PHCODE; tap++) { + cv1800b_set_tap_delay(host, tap); + + if (mmc_send_tuning(host->mmc, opcode, NULL)) { + current_size = 0; + } else { + current_size++; + if (current_size > max_size) { + max_size = current_size; + max_window = tap; + } + } + } + + cv1800b_sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA); + + cv1800b_set_tap_delay(host, max_window - max_size / 2); + + return 0; +} + +const struct sdhci_ops cv1800b_sdhci_sd_ops = { + .platform_execute_tuning = cv1800b_execute_tuning, +}; + +static int cv1800b_sdhci_bind(struct udevice *dev) +{ + struct cv1800b_sdhci_plat *plat = dev_get_plat(dev); + + return sdhci_bind(dev, &plat->mmc, &plat->cfg); +} + +static int cv1800b_sdhci_probe(struct udevice *dev) +{ + struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); + struct cv1800b_sdhci_plat *plat = dev_get_plat(dev); + struct sdhci_host *host = dev_get_priv(dev); + int ret; + + host->name = dev->name; + host->ioaddr = devfdt_get_addr_ptr(dev); + + upriv->mmc = &plat->mmc; + host->mmc = &plat->mmc; + host->mmc->priv = host; + host->mmc->dev = dev; + host->ops = &cv1800b_sdhci_sd_ops; + host->max_clk = MMC_MAX_CLOCK; + + ret = mmc_of_parse(dev, &plat->cfg); + if (ret) + return ret; + + ret = sdhci_setup_cfg(&plat->cfg, host, 0, 200000); + if (ret) + return ret; + + return sdhci_probe(dev); +} + +static const struct udevice_id cv1800b_sdhci_match[] = { + { .compatible = "sophgo,cv1800b-dwcmshc" }, + { } +}; + +U_BOOT_DRIVER(cv1800b_sdhci) = { + .name = "sdhci-cv1800b", + .id = UCLASS_MMC, + .of_match = cv1800b_sdhci_match, + .bind = cv1800b_sdhci_bind, + .probe = cv1800b_sdhci_probe, + .priv_auto = sizeof(struct sdhci_host), + .plat_auto = sizeof(struct cv1800b_sdhci_plat), + .ops = &sdhci_ops, +};