41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
150 lines
3.6 KiB
C
150 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017, STMicroelectronics - All Rights Reserved
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* Author(s): Patrice Chotard, <patrice.chotard@st.com> for STMicroelectronics.
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*/
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#include <common.h>
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#include <dm.h>
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#include <log.h>
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#include <mmc.h>
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#include <reset-uclass.h>
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#include <sdhci.h>
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#include <asm/arch/sdhci.h>
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DECLARE_GLOBAL_DATA_PTR;
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struct sti_sdhci_plat {
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struct mmc_config cfg;
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struct mmc mmc;
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struct reset_ctl reset;
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int instance;
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};
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/**
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* sti_mmc_core_config: configure the Arasan HC
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* @dev : udevice
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*
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* Description: this function is to configure the Arasan MMC HC.
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* This should be called when the system starts in case of, on the SoC,
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* it is needed to configure the host controller.
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* This happens on some SoCs, i.e. StiH410, where the MMC0 inside the flashSS
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* needs to be configured as MMC 4.5 to have full capabilities.
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* W/o these settings the SDHCI could configure and use the embedded controller
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* with limited features.
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*/
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static int sti_mmc_core_config(struct udevice *dev)
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{
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struct sti_sdhci_plat *plat = dev_get_platdata(dev);
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struct sdhci_host *host = dev_get_priv(dev);
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int ret;
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/* only MMC1 has a reset line */
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if (plat->instance) {
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ret = reset_deassert(&plat->reset);
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if (ret < 0) {
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pr_err("MMC1 deassert failed: %d", ret);
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return ret;
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}
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}
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writel(STI_FLASHSS_MMC_CORE_CONFIG_1,
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host->ioaddr + FLASHSS_MMC_CORE_CONFIG_1);
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if (plat->instance) {
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writel(STI_FLASHSS_MMC_CORE_CONFIG2,
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host->ioaddr + FLASHSS_MMC_CORE_CONFIG_2);
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writel(STI_FLASHSS_MMC_CORE_CONFIG3,
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host->ioaddr + FLASHSS_MMC_CORE_CONFIG_3);
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} else {
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writel(STI_FLASHSS_SDCARD_CORE_CONFIG2,
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host->ioaddr + FLASHSS_MMC_CORE_CONFIG_2);
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writel(STI_FLASHSS_SDCARD_CORE_CONFIG3,
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host->ioaddr + FLASHSS_MMC_CORE_CONFIG_3);
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}
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writel(STI_FLASHSS_MMC_CORE_CONFIG4,
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host->ioaddr + FLASHSS_MMC_CORE_CONFIG_4);
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return 0;
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}
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static int sti_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 sti_sdhci_plat *plat = dev_get_platdata(dev);
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struct sdhci_host *host = dev_get_priv(dev);
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int ret;
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/*
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* identify current mmc instance, mmc1 has a reset, not mmc0
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* MMC0 is wired to the SD slot,
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* MMC1 is wired on the high speed connector
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*/
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ret = reset_get_by_index(dev, 0, &plat->reset);
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if (!ret)
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plat->instance = 1;
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else
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if (ret == -ENOENT)
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plat->instance = 0;
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else
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return ret;
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ret = sti_mmc_core_config(dev);
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if (ret)
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return ret;
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host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD |
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SDHCI_QUIRK_32BIT_DMA_ADDR |
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SDHCI_QUIRK_NO_HISPD_BIT;
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host->host_caps = MMC_MODE_DDR_52MHz;
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host->mmc = &plat->mmc;
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host->mmc->dev = dev;
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host->mmc->priv = host;
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ret = sdhci_setup_cfg(&plat->cfg, host, 50000000, 400000);
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if (ret)
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return ret;
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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 sti_sdhci_ofdata_to_platdata(struct udevice *dev)
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{
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struct sdhci_host *host = dev_get_priv(dev);
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host->name = strdup(dev->name);
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host->ioaddr = dev_read_addr_ptr(dev);
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host->bus_width = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
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"bus-width", 4);
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return 0;
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}
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static int sti_sdhci_bind(struct udevice *dev)
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{
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struct sti_sdhci_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 sti_sdhci_ids[] = {
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{ .compatible = "st,sdhci" },
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{ }
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};
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U_BOOT_DRIVER(sti_mmc) = {
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.name = "sti_sdhci",
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.id = UCLASS_MMC,
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.of_match = sti_sdhci_ids,
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.bind = sti_sdhci_bind,
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.ops = &sdhci_ops,
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.ofdata_to_platdata = sti_sdhci_ofdata_to_platdata,
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.probe = sti_sdhci_probe,
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.priv_auto = sizeof(struct sdhci_host),
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.platdata_auto = sizeof(struct sti_sdhci_plat),
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};
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