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118 lines
2.9 KiB
118 lines
2.9 KiB
// 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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