2 * Copyright (c) 2013 Linaro Ltd.
3 * Copyright (c) 2013 Hisilicon Limited.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
11 #include <linux/clk.h>
12 #include <linux/mfd/syscon.h>
13 #include <linux/mmc/host.h>
14 #include <linux/mmc/dw_mmc.h>
15 #include <linux/module.h>
16 #include <linux/of_address.h>
17 #include <linux/platform_device.h>
18 #include <linux/regmap.h>
19 #include <linux/regulator/consumer.h>
22 #include "dw_mmc-pltfm.h"
25 * hi6220 sd only support io voltage 1.8v and 3v
26 * Also need config AO_SCTRL_SEL18 accordingly
28 #define AO_SCTRL_SEL18 BIT(10)
29 #define AO_SCTRL_CTRL3 0x40C
35 static unsigned long dw_mci_hi6220_caps[] = {
41 static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios)
45 ret = clk_set_rate(host->ciu_clk, ios->clock);
47 dev_warn(host->dev, "failed to set rate %uHz\n", ios->clock);
49 host->bus_hz = clk_get_rate(host->ciu_clk);
52 static const struct dw_mci_drv_data k3_drv_data = {
53 .set_ios = dw_mci_k3_set_ios,
56 static int dw_mci_hi6220_parse_dt(struct dw_mci *host)
60 priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL);
64 priv->reg = syscon_regmap_lookup_by_phandle(host->dev->of_node,
65 "hisilicon,peripheral-syscon");
66 if (IS_ERR(priv->reg))
73 static int dw_mci_hi6220_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
75 struct dw_mci_slot *slot = mmc_priv(mmc);
84 if (!priv || !priv->reg)
87 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
88 ret = regmap_update_bits(priv->reg, AO_SCTRL_CTRL3,
92 } else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) {
93 ret = regmap_update_bits(priv->reg, AO_SCTRL_CTRL3,
94 AO_SCTRL_SEL18, AO_SCTRL_SEL18);
98 dev_dbg(host->dev, "voltage not supported\n");
103 dev_dbg(host->dev, "switch voltage failed\n");
107 if (IS_ERR_OR_NULL(mmc->supply.vqmmc))
110 ret = regulator_set_voltage(mmc->supply.vqmmc, min_uv, max_uv);
112 dev_dbg(host->dev, "Regulator set error %d: %d - %d\n",
113 ret, min_uv, max_uv);
120 static void dw_mci_hi6220_set_ios(struct dw_mci *host, struct mmc_ios *ios)
125 clock = (ios->clock <= 25000000) ? 25000000 : ios->clock;
127 ret = clk_set_rate(host->biu_clk, clock);
129 dev_warn(host->dev, "failed to set rate %uHz\n", clock);
131 host->bus_hz = clk_get_rate(host->biu_clk);
134 static int dw_mci_hi6220_execute_tuning(struct dw_mci_slot *slot, u32 opcode)
139 static const struct dw_mci_drv_data hi6220_data = {
140 .caps = dw_mci_hi6220_caps,
141 .switch_voltage = dw_mci_hi6220_switch_voltage,
142 .set_ios = dw_mci_hi6220_set_ios,
143 .parse_dt = dw_mci_hi6220_parse_dt,
144 .execute_tuning = dw_mci_hi6220_execute_tuning,
147 static const struct of_device_id dw_mci_k3_match[] = {
148 { .compatible = "hisilicon,hi4511-dw-mshc", .data = &k3_drv_data, },
149 { .compatible = "hisilicon,hi6220-dw-mshc", .data = &hi6220_data, },
152 MODULE_DEVICE_TABLE(of, dw_mci_k3_match);
154 static int dw_mci_k3_probe(struct platform_device *pdev)
156 const struct dw_mci_drv_data *drv_data;
157 const struct of_device_id *match;
159 match = of_match_node(dw_mci_k3_match, pdev->dev.of_node);
160 drv_data = match->data;
162 return dw_mci_pltfm_register(pdev, drv_data);
165 #ifdef CONFIG_PM_SLEEP
166 static int dw_mci_k3_suspend(struct device *dev)
168 struct dw_mci *host = dev_get_drvdata(dev);
171 ret = dw_mci_suspend(host);
173 clk_disable_unprepare(host->ciu_clk);
178 static int dw_mci_k3_resume(struct device *dev)
180 struct dw_mci *host = dev_get_drvdata(dev);
183 ret = clk_prepare_enable(host->ciu_clk);
185 dev_err(host->dev, "failed to enable ciu clock\n");
189 return dw_mci_resume(host);
191 #endif /* CONFIG_PM_SLEEP */
193 static SIMPLE_DEV_PM_OPS(dw_mci_k3_pmops, dw_mci_k3_suspend, dw_mci_k3_resume);
195 static struct platform_driver dw_mci_k3_pltfm_driver = {
196 .probe = dw_mci_k3_probe,
197 .remove = dw_mci_pltfm_remove,
200 .of_match_table = dw_mci_k3_match,
201 .pm = &dw_mci_k3_pmops,
205 module_platform_driver(dw_mci_k3_pltfm_driver);
207 MODULE_DESCRIPTION("K3 Specific DW-MSHC Driver Extension");
208 MODULE_LICENSE("GPL v2");
209 MODULE_ALIAS("platform:dwmmc_k3");