From 95d6b74cf83e53d3acaff175d5addfcb389068ea Mon Sep 17 00:00:00 2001 From: Sean Anderson Date: Tue, 23 Nov 2021 15:03:39 -0500 Subject: [PATCH] mmc: fsl_esdhc_imx: clean up bus width configuration code [ fsl_esdhc commit 07bae1de382723b94244096953b05225572728cd ] This patch is to clean up bus width setting code. - For DM_MMC, remove getting "bus-width" from device tree. This has been done in mmc_of_parse(). - For non-DM_MMC, move bus width configuration from fsl_esdhc_init() to fsl_esdhc_initialize() which is non-DM_MMC specific. And fix up bus width configuration to support only 1-bit, 4-bit, or 8-bit. Keep using 8-bit if it's not set because many platforms use driver without providing max bus width. - Remove bus_width member from fsl_esdhc_priv structure. Signed-off-by: Yangbo Lu [ converted if statement to switch ] Signed-off-by: Sean Anderson Reviewed-by: Jaehoon Chung --- drivers/mmc/fsl_esdhc_imx.c | 83 ++++++++++++------------------------- 1 file changed, 26 insertions(+), 57 deletions(-) diff --git a/drivers/mmc/fsl_esdhc_imx.c b/drivers/mmc/fsl_esdhc_imx.c index f4ccb19d9f..98b3db737b 100644 --- a/drivers/mmc/fsl_esdhc_imx.c +++ b/drivers/mmc/fsl_esdhc_imx.c @@ -126,7 +126,6 @@ struct esdhc_soc_data { * * @esdhc_regs: registers of the sdhc controller * @sdhc_clk: Current clk of the sdhc controller - * @bus_width: bus width, 1bit, 4bit or 8bit * @cfg: mmc config * @mmc: mmc * Following is used when Driver Model is enabled for MMC @@ -151,7 +150,6 @@ struct fsl_esdhc_priv { struct clk per_clk; unsigned int clock; unsigned int mode; - unsigned int bus_width; #if !CONFIG_IS_ENABLED(DM_MMC) struct mmc *mmc; #endif @@ -1235,31 +1233,13 @@ static int fsl_esdhc_init(struct fsl_esdhc_priv *priv, #if !CONFIG_IS_ENABLED(DM_MMC) cfg->ops = &esdhc_ops; #endif - if (priv->bus_width == 8) - cfg->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT; - else if (priv->bus_width == 4) - cfg->host_caps = MMC_MODE_4BIT; - - cfg->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT; #ifdef CONFIG_SYS_FSL_ESDHC_HAS_DDR_MODE cfg->host_caps |= MMC_MODE_DDR_52MHz; #endif - if (priv->bus_width > 0) { - if (priv->bus_width < 8) - cfg->host_caps &= ~MMC_MODE_8BIT; - if (priv->bus_width < 4) - cfg->host_caps &= ~MMC_MODE_4BIT; - } - if (caps & HOSTCAPBLT_HSS) cfg->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS; -#ifdef CONFIG_ESDHC_DETECT_8_BIT_QUIRK - if (CONFIG_ESDHC_DETECT_8_BIT_QUIRK) - cfg->host_caps &= ~MMC_MODE_8BIT; -#endif - cfg->host_caps |= priv->caps; cfg->f_min = 400000; @@ -1297,25 +1277,11 @@ static int fsl_esdhc_init(struct fsl_esdhc_priv *priv, } #if !CONFIG_IS_ENABLED(DM_MMC) -static int fsl_esdhc_cfg_to_priv(struct fsl_esdhc_cfg *cfg, - struct fsl_esdhc_priv *priv) -{ - if (!cfg || !priv) - return -EINVAL; - - priv->esdhc_regs = (struct fsl_esdhc *)(unsigned long)(cfg->esdhc_base); - priv->bus_width = cfg->max_bus_width; - priv->sdhc_clk = cfg->sdhc_clk; - priv->wp_enable = cfg->wp_enable; - priv->vs18_enable = cfg->vs18_enable; - - return 0; -}; - int fsl_esdhc_initialize(struct bd_info *bis, struct fsl_esdhc_cfg *cfg) { struct fsl_esdhc_plat *plat; struct fsl_esdhc_priv *priv; + struct mmc_config *mmc_cfg; struct mmc *mmc; int ret; @@ -1331,14 +1297,33 @@ int fsl_esdhc_initialize(struct bd_info *bis, struct fsl_esdhc_cfg *cfg) return -ENOMEM; } - ret = fsl_esdhc_cfg_to_priv(cfg, priv); - if (ret) { - debug("%s xlate failure\n", __func__); - free(plat); - free(priv); - return ret; + priv->esdhc_regs = (struct fsl_esdhc *)(unsigned long)(cfg->esdhc_base); + priv->sdhc_clk = cfg->sdhc_clk; + priv->wp_enable = cfg->wp_enable; + + mmc_cfg = &plat->cfg; + + switch (cfg->max_bus_width) { + case 0: /* Not set in config; assume everything is supported */ + case 8: + mmc_cfg->host_caps |= MMC_MODE_8BIT; + fallthrough; + case 4: + mmc_cfg->host_caps |= MMC_MODE_4BIT; + fallthrough; + case 1: + mmc_cfg->host_caps |= MMC_MODE_1BIT; + break; + default: + printf("invalid max bus width %u\n", cfg->max_bus_width); + return -EINVAL; } +#ifdef CONFIG_ESDHC_DETECT_8_BIT_QUIRK + if (CONFIG_ESDHC_DETECT_8_BIT_QUIRK) + mmc_cfg->host_caps &= ~MMC_MODE_8BIT; +#endif + ret = fsl_esdhc_init(priv, plat); if (ret) { debug("%s init failure\n", __func__); @@ -1420,14 +1405,6 @@ static int fsl_esdhc_of_to_plat(struct udevice *dev) priv->dev = dev; priv->mode = -1; - val = dev_read_u32_default(dev, "bus-width", -1); - if (val == 8) - priv->bus_width = 8; - else if (val == 4) - priv->bus_width = 4; - else - priv->bus_width = 1; - val = fdtdec_get_int(fdt, node, "fsl,tuning-step", 1); priv->tuning_step = val; val = fdtdec_get_int(fdt, node, "fsl,tuning-start-tap", @@ -1500,16 +1477,8 @@ static int fsl_esdhc_probe(struct udevice *dev) #if CONFIG_IS_ENABLED(OF_PLATDATA) struct dtd_fsl_esdhc *dtplat = &plat->dtplat; - unsigned int val; priv->esdhc_regs = map_sysmem(dtplat->reg[0], dtplat->reg[1]); - val = plat->dtplat.bus_width; - if (val == 8) - priv->bus_width = 8; - else if (val == 4) - priv->bus_width = 4; - else - priv->bus_width = 1; if (dtplat->non_removable) priv->non_removable = 1; -- 2.39.5