1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2019 IBM Corp.
4 * Eddie James <eajames@linux.ibm.com>
5 */
6
7 #include <common.h>
8 #include <clk.h>
9 #include <dm.h>
10 #include <malloc.h>
11 #include <sdhci.h>
12 #include <linux/err.h>
13
14 struct aspeed_sdhci_plat {
15 struct mmc_config cfg;
16 struct mmc mmc;
17 };
18
aspeed_sdhci_probe(struct udevice * dev)19 static int aspeed_sdhci_probe(struct udevice *dev)
20 {
21 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
22 struct aspeed_sdhci_plat *plat = dev_get_plat(dev);
23 struct sdhci_host *host = dev_get_priv(dev);
24 u32 max_clk;
25 struct clk clk;
26 int ret;
27
28 ret = clk_get_by_index(dev, 0, &clk);
29 if (ret)
30 return ret;
31
32 ret = clk_enable(&clk);
33 if (ret)
34 goto free;
35
36 host->name = dev->name;
37 host->ioaddr = dev_read_addr_ptr(dev);
38
39 max_clk = clk_get_rate(&clk);
40 if (IS_ERR_VALUE(max_clk)) {
41 ret = max_clk;
42 goto err;
43 }
44
45 host->max_clk = max_clk;
46 host->mmc = &plat->mmc;
47 host->mmc->dev = dev;
48 host->mmc->priv = host;
49 upriv->mmc = host->mmc;
50
51 ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
52 if (ret)
53 goto err;
54
55 ret = sdhci_probe(dev);
56 if (ret)
57 goto err;
58
59 return 0;
60
61 err:
62 clk_disable(&clk);
63 free:
64 clk_free(&clk);
65 return ret;
66 }
67
aspeed_sdhci_bind(struct udevice * dev)68 static int aspeed_sdhci_bind(struct udevice *dev)
69 {
70 struct aspeed_sdhci_plat *plat = dev_get_plat(dev);
71
72 return sdhci_bind(dev, &plat->mmc, &plat->cfg);
73 }
74
75 static const struct udevice_id aspeed_sdhci_ids[] = {
76 { .compatible = "aspeed,ast2400-sdhci" },
77 { .compatible = "aspeed,ast2500-sdhci" },
78 { .compatible = "aspeed,ast2600-sdhci" },
79 { }
80 };
81
82 U_BOOT_DRIVER(aspeed_sdhci_drv) = {
83 .name = "aspeed_sdhci",
84 .id = UCLASS_MMC,
85 .of_match = aspeed_sdhci_ids,
86 .ops = &sdhci_ops,
87 .bind = aspeed_sdhci_bind,
88 .probe = aspeed_sdhci_probe,
89 .priv_auto = sizeof(struct sdhci_host),
90 .plat_auto = sizeof(struct aspeed_sdhci_plat),
91 };
92