1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2016 Socionext Inc.
4  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
5  */
6 
7 #include <common.h>
8 #include <clk.h>
9 #include <fdtdec.h>
10 #include <malloc.h>
11 #include <mmc.h>
12 #include <dm.h>
13 #include <dm/device_compat.h>
14 #include <linux/compat.h>
15 #include <linux/dma-direction.h>
16 #include <linux/io.h>
17 #include <linux/sizes.h>
18 #include <power/regulator.h>
19 #include <asm/unaligned.h>
20 
21 #include "tmio-common.h"
22 
23 static const struct dm_mmc_ops uniphier_sd_ops = {
24 	.send_cmd = tmio_sd_send_cmd,
25 	.set_ios = tmio_sd_set_ios,
26 	.get_cd = tmio_sd_get_cd,
27 };
28 
29 static const struct udevice_id uniphier_sd_match[] = {
30 	{ .compatible = "socionext,uniphier-sd-v2.91" },
31 	{ .compatible = "socionext,uniphier-sd-v3.1" },
32 	{ .compatible = "socionext,uniphier-sd-v3.1.1" },
33 	{ /* sentinel */ }
34 };
35 
uniphier_sd_clk_get_rate(struct tmio_sd_priv * priv)36 static ulong uniphier_sd_clk_get_rate(struct tmio_sd_priv *priv)
37 {
38 #if CONFIG_IS_ENABLED(CLK)
39 	return clk_get_rate(&priv->clk);
40 #elif CONFIG_SPL_BUILD
41 	return 100000000;
42 #else
43 	return 0;
44 #endif
45 }
46 
uniphier_sd_probe(struct udevice * dev)47 static int uniphier_sd_probe(struct udevice *dev)
48 {
49 	struct tmio_sd_priv *priv = dev_get_priv(dev);
50 
51 	priv->clk_get_rate = uniphier_sd_clk_get_rate;
52 	priv->read_poll_flag = TMIO_SD_DMA_INFO1_END_RD2;
53 
54 #ifndef CONFIG_SPL_BUILD
55 	int ret;
56 
57 	ret = clk_get_by_index(dev, 0, &priv->clk);
58 	if (ret < 0) {
59 		dev_err(dev, "failed to get host clock\n");
60 		return ret;
61 	}
62 
63 	/* set to max rate */
64 	ret = clk_set_rate(&priv->clk, ULONG_MAX);
65 	if (ret < 0) {
66 		dev_err(dev, "failed to set rate for host clock\n");
67 		clk_free(&priv->clk);
68 		return ret;
69 	}
70 
71 	ret = clk_enable(&priv->clk);
72 	if (ret) {
73 		dev_err(dev, "failed to enable host clock\n");
74 		return ret;
75 	}
76 #endif
77 
78 	return tmio_sd_probe(dev, 0);
79 }
80 
81 U_BOOT_DRIVER(uniphier_mmc) = {
82 	.name = "uniphier-mmc",
83 	.id = UCLASS_MMC,
84 	.of_match = uniphier_sd_match,
85 	.bind = tmio_sd_bind,
86 	.probe = uniphier_sd_probe,
87 	.priv_auto	= sizeof(struct tmio_sd_priv),
88 	.plat_auto	= sizeof(struct tmio_sd_plat),
89 	.ops = &uniphier_sd_ops,
90 };
91