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Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Andrei Pistirica102142c2016-01-28 15:30:18 +05302/*
3 * Support of SDHCI for Microchip PIC32 SoC.
4 *
5 * Copyright (C) 2015 Microchip Technology Inc.
6 * Andrei Pistirica <andrei.pistirica@microchip.com>
Andrei Pistirica102142c2016-01-28 15:30:18 +05307 */
8
Simon Glass4af0d7e2017-05-17 17:18:07 -06009#include <dm.h>
Andrei Pistirica102142c2016-01-28 15:30:18 +053010#include <sdhci.h>
John Robertson6978db32020-09-01 02:55:14 +000011#include <clk.h>
Andrei Pistirica102142c2016-01-28 15:30:18 +053012
John Robertson6978db32020-09-01 02:55:14 +000013struct pic32_sdhci_plat {
14 struct mmc_config cfg;
15 struct mmc mmc;
Jaehoon Chung5e962172016-12-30 15:30:14 +090016};
17
Andrei Pistirica102142c2016-01-28 15:30:18 +053018static int pic32_sdhci_probe(struct udevice *dev)
19{
John Robertson6978db32020-09-01 02:55:14 +000020 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
21 struct pic32_sdhci_plat *plat = dev_get_platdata(dev);
Andrei Pistirica102142c2016-01-28 15:30:18 +053022 struct sdhci_host *host = dev_get_priv(dev);
John Robertson6978db32020-09-01 02:55:14 +000023
24 struct clk clk;
25 ulong clk_rate;
Andrei Pistirica102142c2016-01-28 15:30:18 +053026 int ret;
27
John Robertson6978db32020-09-01 02:55:14 +000028 ret = clk_get_by_name(dev, "base_clk", &clk);
Simon Glasscffe5d82016-05-01 13:52:34 -060029 if (ret)
30 return ret;
John Robertson6978db32020-09-01 02:55:14 +000031
32 clk_rate = clk_get_rate(&clk);
33 clk_free(&clk);
34
35 if (IS_ERR_VALUE(clk_rate))
36 return clk_rate;
37
38 host->ioaddr = dev_remap_addr(dev);
39
40 if (!host->ioaddr)
41 return -EINVAL;
42
43 host->name = dev->name;
44 host->quirks = SDHCI_QUIRK_NO_HISPD_BIT;
45 host->bus_width = dev_read_u32_default(dev, "bus-width", 4);
46 host->max_clk = clk_rate;
47
48 host->mmc = &plat->mmc;
Simon Glasscffe5d82016-05-01 13:52:34 -060049 host->mmc->dev = dev;
50
John Robertson6978db32020-09-01 02:55:14 +000051 ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
52 if (ret)
53 return ret;
54
55 host->mmc->priv = host;
56 upriv->mmc = host->mmc;
57
58 ret = sdhci_probe(dev);
59 if (ret)
60 return ret;
61
62 if (!dev_read_bool(dev, "microchip,use-sdcd")) {
63 // Use workaround 1 for erratum #15 by default
64 u8 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
65 ctrl = (ctrl & ~SDHCI_CTRL_CD_TEST_INS) | SDHCI_CTRL_CD_TEST;
66 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
67 }
68
Simon Glasscffe5d82016-05-01 13:52:34 -060069 return 0;
Andrei Pistirica102142c2016-01-28 15:30:18 +053070}
71
John Robertson6978db32020-09-01 02:55:14 +000072static int pic32_sdhci_bind(struct udevice *dev)
73{
74 struct pic32_sdhci_plat *plat = dev_get_platdata(dev);
75
76 return sdhci_bind(dev, &plat->mmc, &plat->cfg);
77}
78
Andrei Pistirica102142c2016-01-28 15:30:18 +053079static const struct udevice_id pic32_sdhci_ids[] = {
80 { .compatible = "microchip,pic32mzda-sdhci" },
81 { }
82};
83
84U_BOOT_DRIVER(pic32_sdhci_drv) = {
85 .name = "pic32_sdhci",
86 .id = UCLASS_MMC,
87 .of_match = pic32_sdhci_ids,
John Robertson6978db32020-09-01 02:55:14 +000088 .ops = &sdhci_ops,
89 .bind = pic32_sdhci_bind,
Andrei Pistirica102142c2016-01-28 15:30:18 +053090 .probe = pic32_sdhci_probe,
91 .priv_auto_alloc_size = sizeof(struct sdhci_host),
John Robertson6978db32020-09-01 02:55:14 +000092 .platdata_auto_alloc_size = sizeof(struct pic32_sdhci_plat)
Andrei Pistirica102142c2016-01-28 15:30:18 +053093};