xref: /openbmc/u-boot/drivers/mmc/pic32_sdhci.c (revision 4101f687)
1 /*
2  * Support of SDHCI for Microchip PIC32 SoC.
3  *
4  * Copyright (C) 2015 Microchip Technology Inc.
5  * Andrei Pistirica <andrei.pistirica@microchip.com>
6  *
7  * SPDX-License-Identifier:	GPL-2.0+
8  */
9 
10 #include <dm.h>
11 #include <common.h>
12 #include <sdhci.h>
13 #include <asm/errno.h>
14 #include <mach/pic32.h>
15 
16 DECLARE_GLOBAL_DATA_PTR;
17 
18 static int pic32_sdhci_probe(struct udevice *dev)
19 {
20 	struct sdhci_host *host = dev_get_priv(dev);
21 	const void *fdt = gd->fdt_blob;
22 	u32 f_min_max[2];
23 	fdt_addr_t addr;
24 	fdt_size_t size;
25 	int ret;
26 
27 	addr = fdtdec_get_addr_size(fdt, dev->of_offset, "reg", &size);
28 	if (addr == FDT_ADDR_T_NONE)
29 		return -EINVAL;
30 
31 	host->ioaddr	= ioremap(addr, size);
32 	host->name	= (char *)dev->name;
33 	host->quirks	= SDHCI_QUIRK_NO_HISPD_BIT | SDHCI_QUIRK_NO_CD;
34 	host->bus_width	= fdtdec_get_int(gd->fdt_blob, dev->of_offset,
35 					"bus-width", 4);
36 
37 	ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset,
38 				   "clock-freq-min-max", f_min_max, 2);
39 	if (ret) {
40 		printf("sdhci: clock-freq-min-max not found\n");
41 		return ret;
42 	}
43 
44 	return add_sdhci(host, f_min_max[1], f_min_max[0]);
45 }
46 
47 static const struct udevice_id pic32_sdhci_ids[] = {
48 	{ .compatible = "microchip,pic32mzda-sdhci" },
49 	{ }
50 };
51 
52 U_BOOT_DRIVER(pic32_sdhci_drv) = {
53 	.name			= "pic32_sdhci",
54 	.id			= UCLASS_MMC,
55 	.of_match		= pic32_sdhci_ids,
56 	.probe			= pic32_sdhci_probe,
57 	.priv_auto_alloc_size	= sizeof(struct sdhci_host),
58 };
59