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Commit 0293efdd authored by Zhangfei Gao's avatar Zhangfei Gao Committed by Ulf Hansson
Browse files

mmc: dw_mmc: k3: support hi6220 



Support hi6220, tested on hikey board
emmc: support hs
sd: support hs, sdr12, sdr25

Signed-off-by: default avatarJorge A. Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Signed-off-by: default avatarDan Yuan <yuandan@hisilicon.com>
Signed-off-by: default avatarZhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: default avatarJaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 8f7849c4

drivers/mmc/host/dw_mmc-k3.c

+101 −2
Original line number Diff line number Diff line
@@ -8,16 +8,30 @@ 
 * (at your option) any later version.

 */



#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/clk.h>

#include <linux/mfd/syscon.h>

#include <linux/mmc/host.h>

#include <linux/mmc/dw_mmc.h>

#include <linux/module.h>

#include <linux/of_address.h>

#include <linux/platform_device.h>

#include <linux/regmap.h>

#include <linux/regulator/consumer.h>



#include "dw_mmc.h"

#include "dw_mmc-pltfm.h"



/*

 * hi6220 sd only support io voltage 1.8v and 3v

 * Also need config AO_SCTRL_SEL18 accordingly

 */

#define AO_SCTRL_SEL18		BIT(10)

#define AO_SCTRL_CTRL3		0x40C



struct k3_priv {

	struct regmap	*reg;

};



static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios)

{

	int ret;
@@ -33,8 +47,93 @@ static const struct dw_mci_drv_data k3_drv_data = { 
	.set_ios		= dw_mci_k3_set_ios,

};



static int dw_mci_hi6220_parse_dt(struct dw_mci *host)

{

	struct k3_priv *priv;



	priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL);

	if (!priv)

		return -ENOMEM;



	priv->reg = syscon_regmap_lookup_by_phandle(host->dev->of_node,

					 "hisilicon,peripheral-syscon");

	if (IS_ERR(priv->reg))

		priv->reg = NULL;



	host->priv = priv;

	return 0;

}



static int dw_mci_hi6220_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)

{

	struct dw_mci_slot *slot = mmc_priv(mmc);

	struct k3_priv *priv;

	struct dw_mci *host;

	int min_uv, max_uv;

	int ret;



	host = slot->host;

	priv = host->priv;



	if (!priv || !priv->reg)

		return 0;



	if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {

		ret = regmap_update_bits(priv->reg, AO_SCTRL_CTRL3,

					 AO_SCTRL_SEL18, 0);

		min_uv = 3000000;

		max_uv = 3000000;

	} else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) {

		ret = regmap_update_bits(priv->reg, AO_SCTRL_CTRL3,

					 AO_SCTRL_SEL18, AO_SCTRL_SEL18);

		min_uv = 1800000;

		max_uv = 1800000;

	} else {

		dev_dbg(host->dev, "voltage not supported\n");

		return -EINVAL;

	}



	if (ret) {

		dev_dbg(host->dev, "switch voltage failed\n");

		return ret;

	}



	if (IS_ERR_OR_NULL(mmc->supply.vqmmc))

		return 0;



	ret = regulator_set_voltage(mmc->supply.vqmmc, min_uv, max_uv);

	if (ret) {

		dev_dbg(host->dev, "Regulator set error %d: %d - %d\n",

				 ret, min_uv, max_uv);

		return ret;

	}



	return 0;

}



static void dw_mci_hi6220_set_ios(struct dw_mci *host, struct mmc_ios *ios)

{

	int ret;

	unsigned int clock;



	clock = (ios->clock <= 25000000) ? 25000000 : ios->clock;



	ret = clk_set_rate(host->biu_clk, clock);

	if (ret)

		dev_warn(host->dev, "failed to set rate %uHz\n", clock);



	host->bus_hz = clk_get_rate(host->biu_clk);

}



static const struct dw_mci_drv_data hi6220_data = {

	.switch_voltage		= dw_mci_hi6220_switch_voltage,

	.set_ios		= dw_mci_hi6220_set_ios,

	.parse_dt		= dw_mci_hi6220_parse_dt,

};



static const struct of_device_id dw_mci_k3_match[] = {

	{ .compatible = "hisilicon,hi4511-dw-mshc", .data = &k3_drv_data, },

	{ .compatible = "hisilicon,hi6220-dw-mshc", .data = &hi6220_data, },

	{},

};

MODULE_DEVICE_TABLE(of, dw_mci_k3_match);