1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (C) 2023-2025 SpacemiT (Hangzhou) Technology Co. Ltd
12 #include <linux/mmc/card.h>
13 #include <linux/mmc/host.h>
14 #include <linux/mmc/mmc.h>
21 #include "sdhci-pltfm.h"
69 static inline void spacemit_sdhci_setbits(struct sdhci_host *host, u32 val, int reg)  in spacemit_sdhci_setbits()  argument
71 	sdhci_writel(host, sdhci_readl(host, reg) | val, reg);  in spacemit_sdhci_setbits()
74 static inline void spacemit_sdhci_clrbits(struct sdhci_host *host, u32 val, int reg)  in spacemit_sdhci_clrbits()  argument
76 	sdhci_writel(host, sdhci_readl(host, reg) & ~val, reg);  in spacemit_sdhci_clrbits()
79 static inline void spacemit_sdhci_clrsetbits(struct sdhci_host *host, u32 clr, u32 set, int reg)  in spacemit_sdhci_clrsetbits()  argument
81 	u32 val = sdhci_readl(host, reg);  in spacemit_sdhci_clrsetbits()
84 	sdhci_writel(host, val, reg);  in spacemit_sdhci_clrsetbits()
87 static void spacemit_sdhci_reset(struct sdhci_host *host, u8 mask)  in spacemit_sdhci_reset()  argument
89 	sdhci_reset(host, mask);  in spacemit_sdhci_reset()
94 	spacemit_sdhci_setbits(host, PHY_FUNC_EN | PHY_PLL_LOCK, SDHC_PHY_CTRL_REG);  in spacemit_sdhci_reset()
96 	spacemit_sdhci_clrsetbits(host, PHY_DRIVE_SEL,  in spacemit_sdhci_reset()
100 	if (!(host->mmc->caps2 & MMC_CAP2_NO_MMC))  in spacemit_sdhci_reset()
101 		spacemit_sdhci_setbits(host, MMC_CARD_MODE, SDHC_MMC_CTRL_REG);  in spacemit_sdhci_reset()
104 static void spacemit_sdhci_set_uhs_signaling(struct sdhci_host *host, unsigned int timing)  in spacemit_sdhci_set_uhs_signaling()  argument
107 		spacemit_sdhci_setbits(host, MMC_HS200, SDHC_MMC_CTRL_REG);  in spacemit_sdhci_set_uhs_signaling()
110 		spacemit_sdhci_setbits(host, MMC_HS400, SDHC_MMC_CTRL_REG);  in spacemit_sdhci_set_uhs_signaling()
112 	sdhci_set_uhs_signaling(host, timing);  in spacemit_sdhci_set_uhs_signaling()
114 	if (!(host->mmc->caps2 & MMC_CAP2_NO_SDIO))  in spacemit_sdhci_set_uhs_signaling()
115 		spacemit_sdhci_setbits(host, SDHCI_CTRL_VDD_180, SDHCI_HOST_CONTROL2);  in spacemit_sdhci_set_uhs_signaling()
118 static void spacemit_sdhci_set_clock(struct sdhci_host *host, unsigned int clock)  in spacemit_sdhci_set_clock()  argument
120 	struct mmc_host *mmc = host->mmc;  in spacemit_sdhci_set_clock()  local
122 	if (mmc->ios.timing <= MMC_TIMING_UHS_SDR50)  in spacemit_sdhci_set_clock()
123 		spacemit_sdhci_setbits(host, TX_INT_CLK_SEL, SDHC_TX_CFG_REG);  in spacemit_sdhci_set_clock()
125 		spacemit_sdhci_clrbits(host, TX_INT_CLK_SEL, SDHC_TX_CFG_REG);  in spacemit_sdhci_set_clock()
127 	sdhci_set_clock(host, clock);  in spacemit_sdhci_set_clock()
130 static void spacemit_sdhci_phy_dll_init(struct sdhci_host *host)  in spacemit_sdhci_phy_dll_init()  argument
135 	spacemit_sdhci_clrsetbits(host, DLL_PREDLY_NUM | DLL_FULLDLY_RANGE | DLL_VREG_CTRL,  in spacemit_sdhci_phy_dll_init()
141 	spacemit_sdhci_clrsetbits(host, DLL_REG1_CTRL,  in spacemit_sdhci_phy_dll_init()
145 	spacemit_sdhci_setbits(host, DLL_ENABLE, SDHC_PHY_DLLCFG);  in spacemit_sdhci_phy_dll_init()
147 	ret = readl_poll_timeout(host->ioaddr + SDHC_PHY_DLLSTS, state,  in spacemit_sdhci_phy_dll_init()
149 	if (ret == -ETIMEDOUT)  in spacemit_sdhci_phy_dll_init()
150 		dev_warn(mmc_dev(host->mmc), "fail to lock phy dll in 100us!\n");  in spacemit_sdhci_phy_dll_init()
153 static void spacemit_sdhci_hs400_enhanced_strobe(struct mmc_host *mmc, struct mmc_ios *ios)  in spacemit_sdhci_hs400_enhanced_strobe()  argument
155 	struct sdhci_host *host = mmc_priv(mmc);  in spacemit_sdhci_hs400_enhanced_strobe()  local
157 	if (!ios->enhanced_strobe) {  in spacemit_sdhci_hs400_enhanced_strobe()
158 		spacemit_sdhci_clrbits(host, ENHANCE_STROBE_EN, SDHC_MMC_CTRL_REG);  in spacemit_sdhci_hs400_enhanced_strobe()
162 	spacemit_sdhci_setbits(host, ENHANCE_STROBE_EN, SDHC_MMC_CTRL_REG);  in spacemit_sdhci_hs400_enhanced_strobe()
163 	spacemit_sdhci_phy_dll_init(host);  in spacemit_sdhci_hs400_enhanced_strobe()
166 static unsigned int spacemit_sdhci_clk_get_max_clock(struct sdhci_host *host)  in spacemit_sdhci_clk_get_max_clock()  argument
168 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);  in spacemit_sdhci_clk_get_max_clock()
170 	return clk_get_rate(pltfm_host->clk);  in spacemit_sdhci_clk_get_max_clock()
173 static int spacemit_sdhci_pre_select_hs400(struct mmc_host *mmc)  in spacemit_sdhci_pre_select_hs400()  argument
175 	struct sdhci_host *host = mmc_priv(mmc);  in spacemit_sdhci_pre_select_hs400()  local
177 	spacemit_sdhci_setbits(host, MMC_HS400, SDHC_MMC_CTRL_REG);  in spacemit_sdhci_pre_select_hs400()
178 	host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;  in spacemit_sdhci_pre_select_hs400()
183 static void spacemit_sdhci_post_select_hs400(struct mmc_host *mmc)  in spacemit_sdhci_post_select_hs400()  argument
185 	struct sdhci_host *host = mmc_priv(mmc);  in spacemit_sdhci_post_select_hs400()  local
187 	spacemit_sdhci_phy_dll_init(host);  in spacemit_sdhci_post_select_hs400()
188 	host->mmc->caps &= ~MMC_CAP_WAIT_WHILE_BUSY;  in spacemit_sdhci_post_select_hs400()
191 static void spacemit_sdhci_pre_hs400_to_hs200(struct mmc_host *mmc)  in spacemit_sdhci_pre_hs400_to_hs200()  argument
193 	struct sdhci_host *host = mmc_priv(mmc);  in spacemit_sdhci_pre_hs400_to_hs200()  local
195 	spacemit_sdhci_clrbits(host, PHY_FUNC_EN | PHY_PLL_LOCK, SDHC_PHY_CTRL_REG);  in spacemit_sdhci_pre_hs400_to_hs200()
196 	spacemit_sdhci_clrbits(host, MMC_HS400 | MMC_HS200 | ENHANCE_STROBE_EN, SDHC_MMC_CTRL_REG);  in spacemit_sdhci_pre_hs400_to_hs200()
197 	spacemit_sdhci_clrbits(host, HS200_USE_RFIFO, SDHC_PHY_FUNC_REG);  in spacemit_sdhci_pre_hs400_to_hs200()
201 	spacemit_sdhci_setbits(host, PHY_FUNC_EN | PHY_PLL_LOCK, SDHC_PHY_CTRL_REG);  in spacemit_sdhci_pre_hs400_to_hs200()
209 	sdhst->clk_core = devm_clk_get_enabled(dev, "core");  in spacemit_sdhci_get_clocks()
210 	if (IS_ERR(sdhst->clk_core))  in spacemit_sdhci_get_clocks()
211 		return -EINVAL;  in spacemit_sdhci_get_clocks()
213 	sdhst->clk_io = devm_clk_get_enabled(dev, "io");  in spacemit_sdhci_get_clocks()
214 	if (IS_ERR(sdhst->clk_io))  in spacemit_sdhci_get_clocks()
215 		return -EINVAL;  in spacemit_sdhci_get_clocks()
217 	pltfm_host->clk = sdhst->clk_io;  in spacemit_sdhci_get_clocks()
243 	{ .compatible = "spacemit,k1-sdhci" },
250 	struct device *dev = &pdev->dev;  in spacemit_sdhci_probe()
253 	struct sdhci_host *host;  in spacemit_sdhci_probe()  local
257 	host = sdhci_pltfm_init(pdev, &spacemit_sdhci_k1_pdata, sizeof(*sdhst));  in spacemit_sdhci_probe()
258 	if (IS_ERR(host))  in spacemit_sdhci_probe()
259 		return PTR_ERR(host);  in spacemit_sdhci_probe()
261 	pltfm_host = sdhci_priv(host);  in spacemit_sdhci_probe()
263 	ret = mmc_of_parse(host->mmc);  in spacemit_sdhci_probe()
269 	if (!(host->mmc->caps2 & MMC_CAP2_NO_MMC)) {  in spacemit_sdhci_probe()
270 		mops = &host->mmc_host_ops;  in spacemit_sdhci_probe()
271 		mops->hs400_prepare_ddr	= spacemit_sdhci_pre_select_hs400;  in spacemit_sdhci_probe()
272 		mops->hs400_complete	= spacemit_sdhci_post_select_hs400;  in spacemit_sdhci_probe()
273 		mops->hs400_downgrade	= spacemit_sdhci_pre_hs400_to_hs200;  in spacemit_sdhci_probe()
274 		mops->hs400_enhanced_strobe = spacemit_sdhci_hs400_enhanced_strobe;  in spacemit_sdhci_probe()
277 	host->mmc->caps |= MMC_CAP_NEED_RSP_BUSY;  in spacemit_sdhci_probe()
282 	ret = sdhci_add_host(host);  in spacemit_sdhci_probe()
295 		.name	= "sdhci-spacemit",