1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Socionext F_SDH30 eMMC driver
4 * Copyright 2021 Linaro Ltd.
5 * Copyright 2021 Socionext, Inc.
6 */
7
8#include <common.h>
9#include <clk.h>
10#include <dm.h>
11#include <malloc.h>
12#include <sdhci.h>
13
14#define F_SDH30_ESD_CONTROL		0x124
15#define F_SDH30_CMD_DAT_DELAY		BIT(9)
16
17#define F_SDH30_TEST			0x158
18#define F_SDH30_FORCE_CARD_INSERT	BIT(6)
19
20struct f_sdh30_data {
21	void (*init)(struct udevice *dev);
22	u32 quirks;
23};
24
25struct f_sdh30_plat {
26	struct mmc_config cfg;
27	struct mmc mmc;
28
29	bool enable_cmd_dat_delay;
30	const struct f_sdh30_data *data;
31};
32
33DECLARE_GLOBAL_DATA_PTR;
34
35static void f_sdh30_e51_init(struct udevice *dev)
36{
37	struct f_sdh30_plat *plat = dev_get_plat(dev);
38	struct sdhci_host *host = dev_get_priv(dev);
39	u32 val;
40
41	val = sdhci_readl(host, F_SDH30_ESD_CONTROL);
42	if (plat->enable_cmd_dat_delay)
43		val |= F_SDH30_CMD_DAT_DELAY;
44	else
45		val &= ~F_SDH30_CMD_DAT_DELAY;
46	sdhci_writel(host, val, F_SDH30_ESD_CONTROL);
47
48	val = sdhci_readl(host, F_SDH30_TEST);
49	if (plat->cfg.host_caps & MMC_CAP_NONREMOVABLE)
50		val |= F_SDH30_FORCE_CARD_INSERT;
51	else
52		val &= ~F_SDH30_FORCE_CARD_INSERT;
53	sdhci_writel(host, val, F_SDH30_TEST);
54}
55
56static int f_sdh30_sdhci_probe(struct udevice *dev)
57{
58	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
59	struct f_sdh30_plat *plat = dev_get_plat(dev);
60	struct sdhci_host *host = dev_get_priv(dev);
61	int ret;
62
63	plat->data = (const struct f_sdh30_data *)dev_get_driver_data(dev);
64
65	ret = mmc_of_parse(dev, &plat->cfg);
66	if (ret)
67		return ret;
68
69	host->mmc = &plat->mmc;
70	host->mmc->dev = dev;
71	host->mmc->priv = host;
72
73	if (plat->data && plat->data->quirks)
74		host->quirks = plat->data->quirks;
75
76	ret = sdhci_setup_cfg(&plat->cfg, host, 200000000, 400000);
77	if (ret)
78		return ret;
79
80	upriv->mmc = host->mmc;
81
82	mmc_set_clock(host->mmc, host->mmc->cfg->f_min, MMC_CLK_ENABLE);
83
84	ret = sdhci_probe(dev);
85	if (ret)
86		return ret;
87
88	if (plat->data && plat->data->init)
89		plat->data->init(dev);
90
91	return 0;
92}
93
94static int f_sdh30_of_to_plat(struct udevice *dev)
95{
96	struct sdhci_host *host = dev_get_priv(dev);
97	struct f_sdh30_plat *plat = dev_get_plat(dev);
98
99	host->name = strdup(dev->name);
100	host->ioaddr = dev_read_addr_ptr(dev);
101	host->bus_width = dev_read_u32_default(dev, "bus-width", 4);
102	host->index = dev_read_u32_default(dev, "index", 0);
103
104	plat->enable_cmd_dat_delay =
105		dev_read_bool(dev, "socionext,enable-cmd-dat-delay");
106
107	return 0;
108}
109
110static int f_sdh30_bind(struct udevice *dev)
111{
112	struct f_sdh30_plat *plat = dev_get_plat(dev);
113
114	return sdhci_bind(dev, &plat->mmc, &plat->cfg);
115}
116
117static const struct f_sdh30_data f_sdh30_e51_data = {
118	.init = f_sdh30_e51_init,
119	.quirks = SDHCI_QUIRK_WAIT_SEND_CMD | SDHCI_QUIRK_SUPPORT_SINGLE,
120};
121
122static const struct udevice_id f_sdh30_mmc_ids[] = {
123	{
124		.compatible = "fujitsu,mb86s70-sdhci-3.0",
125	},
126	{
127		.compatible = "socionext,f-sdh30-e51-mmc",
128		.data = (ulong)&f_sdh30_e51_data,
129	},
130	{ }
131};
132
133U_BOOT_DRIVER(f_sdh30_drv) = {
134	.name		= "f_sdh30_sdhci",
135	.id		= UCLASS_MMC,
136	.of_match	= f_sdh30_mmc_ids,
137	.of_to_plat	= f_sdh30_of_to_plat,
138	.ops		= &sdhci_ops,
139	.bind		= f_sdh30_bind,
140	.probe		= f_sdh30_sdhci_probe,
141	.priv_auto	= sizeof(struct sdhci_host),
142	.plat_auto	= sizeof(struct f_sdh30_plat),
143};
144