@@ -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);