119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2016 Fuzhou Rockchip Electronics Co., Ltd
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*
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* Rockchip SD Host Controller Interface
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*/
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#include <common.h>
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#include <dm.h>
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#include <dt-structs.h>
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#include <linux/libfdt.h>
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#include <malloc.h>
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#include <mapmem.h>
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#include <sdhci.h>
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#include <clk.h>
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/* 400KHz is max freq for card ID etc. Use that as min */
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#define EMMC_MIN_FREQ 400000
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struct rockchip_sdhc_plat {
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#if CONFIG_IS_ENABLED(OF_PLATDATA)
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struct dtd_rockchip_rk3399_sdhci_5_1 dtplat;
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#endif
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struct mmc_config cfg;
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struct mmc mmc;
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};
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struct rockchip_sdhc {
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struct sdhci_host host;
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void *base;
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};
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static int arasan_sdhci_probe(struct udevice *dev)
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{
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struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
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struct rockchip_sdhc_plat *plat = dev_get_platdata(dev);
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struct rockchip_sdhc *prv = dev_get_priv(dev);
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struct sdhci_host *host = &prv->host;
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int max_frequency, ret;
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struct clk clk;
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#if CONFIG_IS_ENABLED(OF_PLATDATA)
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struct dtd_rockchip_rk3399_sdhci_5_1 *dtplat = &plat->dtplat;
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host->name = dev->name;
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host->ioaddr = map_sysmem(dtplat->reg[0], dtplat->reg[1]);
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max_frequency = dtplat->max_frequency;
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ret = clk_get_by_index_platdata(dev, 0, dtplat->clocks, &clk);
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#else
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max_frequency = dev_read_u32_default(dev, "max-frequency", 0);
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ret = clk_get_by_index(dev, 0, &clk);
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#endif
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if (!ret) {
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ret = clk_set_rate(&clk, max_frequency);
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if (IS_ERR_VALUE(ret))
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printf("%s clk set rate fail!\n", __func__);
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} else {
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printf("%s fail to get clk\n", __func__);
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}
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host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD;
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host->max_clk = max_frequency;
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/*
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* The sdhci-driver only supports 4bit and 8bit, as sdhci_setup_cfg
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* doesn't allow us to clear MMC_MODE_4BIT. Consequently, we don't
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* check for other bus-width values.
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*/
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if (host->bus_width == 8)
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host->host_caps |= MMC_MODE_8BIT;
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ret = sdhci_setup_cfg(&plat->cfg, host, 0, EMMC_MIN_FREQ);
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host->mmc = &plat->mmc;
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if (ret)
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return ret;
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host->mmc->priv = &prv->host;
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host->mmc->dev = dev;
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upriv->mmc = host->mmc;
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return sdhci_probe(dev);
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}
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static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev)
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{
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#if !CONFIG_IS_ENABLED(OF_PLATDATA)
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struct sdhci_host *host = dev_get_priv(dev);
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host->name = dev->name;
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host->ioaddr = dev_read_addr_ptr(dev);
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host->bus_width = dev_read_u32_default(dev, "bus-width", 4);
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#endif
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return 0;
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}
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static int rockchip_sdhci_bind(struct udevice *dev)
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{
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struct rockchip_sdhc_plat *plat = dev_get_platdata(dev);
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return sdhci_bind(dev, &plat->mmc, &plat->cfg);
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}
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static const struct udevice_id arasan_sdhci_ids[] = {
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{ .compatible = "arasan,sdhci-5.1" },
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{ }
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};
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U_BOOT_DRIVER(arasan_sdhci_drv) = {
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.name = "rockchip_rk3399_sdhci_5_1",
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.id = UCLASS_MMC,
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.of_match = arasan_sdhci_ids,
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.ofdata_to_platdata = arasan_sdhci_ofdata_to_platdata,
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.ops = &sdhci_ops,
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.bind = rockchip_sdhci_bind,
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.probe = arasan_sdhci_probe,
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.priv_auto_alloc_size = sizeof(struct rockchip_sdhc),
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.platdata_auto_alloc_size = sizeof(struct rockchip_sdhc_plat),
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};
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