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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>
hifive-unleashed-5.1
Zhangfei Gao 2015-05-14 16:45:19 +08:00 committed by Ulf Hansson
parent 8f7849c4f9
commit 0293efddad
1 changed files with 101 additions and 2 deletions
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103
drivers/mmc/host/dw_mmc-k3.c
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@ -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);