mmc: dw_mmc: k3: support hi6220
Support hi6220, tested on hikey board emmc: support hs sd: support hs, sdr12, sdr25 Signed-off-by: Jorge A. Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org> Signed-off-by: Dan Yuan <yuandan@hisilicon.com> Signed-off-by: Zhangfei Gao <zhangfei.gao@linaro.org> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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@ -8,16 +8,30 @@
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* (at your option) any later version.
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* (at your option) any later version.
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*/
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/clk.h>
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#include <linux/mfd/syscon.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/dw_mmc.h>
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#include <linux/mmc/dw_mmc.h>
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#include <linux/module.h>
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#include <linux/of_address.h>
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#include <linux/of_address.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#include "dw_mmc.h"
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#include "dw_mmc.h"
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#include "dw_mmc-pltfm.h"
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#include "dw_mmc-pltfm.h"
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/*
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* hi6220 sd only support io voltage 1.8v and 3v
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* Also need config AO_SCTRL_SEL18 accordingly
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*/
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#define AO_SCTRL_SEL18 BIT(10)
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#define AO_SCTRL_CTRL3 0x40C
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struct k3_priv {
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struct regmap *reg;
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};
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static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios)
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static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios)
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{
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{
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int ret;
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int ret;
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@ -33,8 +47,93 @@ static const struct dw_mci_drv_data k3_drv_data = {
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.set_ios = dw_mci_k3_set_ios,
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.set_ios = dw_mci_k3_set_ios,
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};
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};
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static int dw_mci_hi6220_parse_dt(struct dw_mci *host)
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{
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struct k3_priv *priv;
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priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->reg = syscon_regmap_lookup_by_phandle(host->dev->of_node,
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"hisilicon,peripheral-syscon");
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if (IS_ERR(priv->reg))
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priv->reg = NULL;
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host->priv = priv;
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return 0;
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}
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static int dw_mci_hi6220_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
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{
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struct dw_mci_slot *slot = mmc_priv(mmc);
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struct k3_priv *priv;
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struct dw_mci *host;
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int min_uv, max_uv;
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int ret;
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host = slot->host;
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priv = host->priv;
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if (!priv || !priv->reg)
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return 0;
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if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
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ret = regmap_update_bits(priv->reg, AO_SCTRL_CTRL3,
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AO_SCTRL_SEL18, 0);
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min_uv = 3000000;
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max_uv = 3000000;
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} else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) {
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ret = regmap_update_bits(priv->reg, AO_SCTRL_CTRL3,
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AO_SCTRL_SEL18, AO_SCTRL_SEL18);
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min_uv = 1800000;
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max_uv = 1800000;
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} else {
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dev_dbg(host->dev, "voltage not supported\n");
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return -EINVAL;
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}
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if (ret) {
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dev_dbg(host->dev, "switch voltage failed\n");
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return ret;
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}
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if (IS_ERR_OR_NULL(mmc->supply.vqmmc))
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return 0;
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ret = regulator_set_voltage(mmc->supply.vqmmc, min_uv, max_uv);
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if (ret) {
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dev_dbg(host->dev, "Regulator set error %d: %d - %d\n",
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ret, min_uv, max_uv);
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return ret;
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}
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return 0;
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}
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static void dw_mci_hi6220_set_ios(struct dw_mci *host, struct mmc_ios *ios)
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{
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int ret;
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unsigned int clock;
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clock = (ios->clock <= 25000000) ? 25000000 : ios->clock;
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ret = clk_set_rate(host->biu_clk, clock);
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if (ret)
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dev_warn(host->dev, "failed to set rate %uHz\n", clock);
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host->bus_hz = clk_get_rate(host->biu_clk);
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}
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static const struct dw_mci_drv_data hi6220_data = {
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.switch_voltage = dw_mci_hi6220_switch_voltage,
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.set_ios = dw_mci_hi6220_set_ios,
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.parse_dt = dw_mci_hi6220_parse_dt,
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};
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static const struct of_device_id dw_mci_k3_match[] = {
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static const struct of_device_id dw_mci_k3_match[] = {
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{ .compatible = "hisilicon,hi4511-dw-mshc", .data = &k3_drv_data, },
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{ .compatible = "hisilicon,hi4511-dw-mshc", .data = &k3_drv_data, },
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{ .compatible = "hisilicon,hi6220-dw-mshc", .data = &hi6220_data, },
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{},
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{},
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};
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};
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MODULE_DEVICE_TABLE(of, dw_mci_k3_match);
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MODULE_DEVICE_TABLE(of, dw_mci_k3_match);
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