Add an MMC driver which supports RK3288, but may also support other SoCs. It uses the Designware MMC device. Signed-off-by: Simon Glass <sjg@chromium.org>master
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/*
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* Copyright (c) 2013 Google, Inc |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <common.h> |
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#include <clk.h> |
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#include <dm.h> |
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#include <dwmmc.h> |
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#include <errno.h> |
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#include <syscon.h> |
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#include <asm/arch/clock.h> |
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#include <asm/arch/periph.h> |
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#include <linux/err.h> |
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DECLARE_GLOBAL_DATA_PTR; |
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struct rockchip_dwmmc_priv { |
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struct udevice *clk; |
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struct rk3288_grf *grf; |
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struct dwmci_host host; |
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}; |
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static uint rockchip_dwmmc_get_mmc_clk(struct dwmci_host *host, uint freq) |
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{ |
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struct udevice *dev = host->priv; |
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struct rockchip_dwmmc_priv *priv = dev_get_priv(dev); |
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int ret; |
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ret = clk_set_periph_rate(priv->clk, PERIPH_ID_SDMMC0 + host->dev_index, |
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freq); |
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if (ret < 0) { |
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debug("%s: err=%d\n", __func__, ret); |
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return ret; |
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} |
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return freq; |
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} |
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static int rockchip_dwmmc_ofdata_to_platdata(struct udevice *dev) |
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{ |
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struct rockchip_dwmmc_priv *priv = dev_get_priv(dev); |
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struct dwmci_host *host = &priv->host; |
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host->name = dev->name; |
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host->ioaddr = (void *)dev_get_addr(dev); |
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host->buswidth = fdtdec_get_int(gd->fdt_blob, dev->of_offset, |
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"bus-width", 4); |
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host->get_mmc_clk = rockchip_dwmmc_get_mmc_clk; |
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host->priv = dev; |
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/* TODO(sjg@chromium.org): Remove the need for this hack */ |
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host->dev_index = (ulong)host->ioaddr == 0xff0f0000 ? 0 : 1; |
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return 0; |
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} |
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static int rockchip_dwmmc_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_dwmmc_priv *priv = dev_get_priv(dev); |
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struct dwmci_host *host = &priv->host; |
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u32 minmax[2]; |
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int ret; |
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priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); |
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if (IS_ERR(priv->grf)) |
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return PTR_ERR(priv->grf); |
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ret = uclass_get_device(UCLASS_CLK, CLK_GENERAL, &priv->clk); |
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if (ret) |
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return ret; |
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ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset, |
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"clock-freq-min-max", minmax, 2); |
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if (!ret) |
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ret = add_dwmci(host, minmax[1], minmax[0]); |
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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 0; |
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} |
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static const struct udevice_id rockchip_dwmmc_ids[] = { |
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{ .compatible = "rockchip,rk3288-dw-mshc" }, |
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{ } |
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}; |
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U_BOOT_DRIVER(rockchip_dwmmc_drv) = { |
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.name = "rockchip_dwmmc", |
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.id = UCLASS_MMC, |
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.of_match = rockchip_dwmmc_ids, |
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.ofdata_to_platdata = rockchip_dwmmc_ofdata_to_platdata, |
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.probe = rockchip_dwmmc_probe, |
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.priv_auto_alloc_size = sizeof(struct rockchip_dwmmc_priv), |
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}; |
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