1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Support of SDHCI for Microchip PIC32 SoC.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Copyright (C) 2015 Microchip Technology Inc.
5*4882a593Smuzhiyun * Andrei Pistirica <andrei.pistirica@microchip.com>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <common.h>
11*4882a593Smuzhiyun #include <dm.h>
12*4882a593Smuzhiyun #include <sdhci.h>
13*4882a593Smuzhiyun #include <linux/errno.h>
14*4882a593Smuzhiyun #include <mach/pic32.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun DECLARE_GLOBAL_DATA_PTR;
17*4882a593Smuzhiyun
pic32_sdhci_get_cd(struct sdhci_host * host)18*4882a593Smuzhiyun static int pic32_sdhci_get_cd(struct sdhci_host *host)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun /* PIC32 SDHCI CD errata:
21*4882a593Smuzhiyun * - set CD_TEST and clear CD_TEST_INS bit
22*4882a593Smuzhiyun */
23*4882a593Smuzhiyun sdhci_writeb(host, SDHCI_CTRL_CD_TEST, SDHCI_HOST_CONTROL);
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun return 0;
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun static const struct sdhci_ops pic32_sdhci_ops = {
29*4882a593Smuzhiyun .get_cd = pic32_sdhci_get_cd,
30*4882a593Smuzhiyun };
31*4882a593Smuzhiyun
pic32_sdhci_probe(struct udevice * dev)32*4882a593Smuzhiyun static int pic32_sdhci_probe(struct udevice *dev)
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun struct sdhci_host *host = dev_get_priv(dev);
35*4882a593Smuzhiyun const void *fdt = gd->fdt_blob;
36*4882a593Smuzhiyun u32 f_min_max[2];
37*4882a593Smuzhiyun fdt_addr_t addr;
38*4882a593Smuzhiyun fdt_size_t size;
39*4882a593Smuzhiyun int ret;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun addr = fdtdec_get_addr_size(fdt, dev_of_offset(dev), "reg", &size);
42*4882a593Smuzhiyun if (addr == FDT_ADDR_T_NONE)
43*4882a593Smuzhiyun return -EINVAL;
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun host->ioaddr = ioremap(addr, size);
46*4882a593Smuzhiyun host->name = dev->name;
47*4882a593Smuzhiyun host->quirks = SDHCI_QUIRK_NO_HISPD_BIT;
48*4882a593Smuzhiyun host->bus_width = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
49*4882a593Smuzhiyun "bus-width", 4);
50*4882a593Smuzhiyun host->ops = &pic32_sdhci_ops;
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(dev),
53*4882a593Smuzhiyun "clock-freq-min-max", f_min_max, 2);
54*4882a593Smuzhiyun if (ret) {
55*4882a593Smuzhiyun printf("sdhci: clock-freq-min-max not found\n");
56*4882a593Smuzhiyun return ret;
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun host->max_clk = f_min_max[1];
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun ret = add_sdhci(host, 0, f_min_max[0]);
62*4882a593Smuzhiyun if (ret)
63*4882a593Smuzhiyun return ret;
64*4882a593Smuzhiyun host->mmc->dev = dev;
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun return 0;
67*4882a593Smuzhiyun }
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun static const struct udevice_id pic32_sdhci_ids[] = {
70*4882a593Smuzhiyun { .compatible = "microchip,pic32mzda-sdhci" },
71*4882a593Smuzhiyun { }
72*4882a593Smuzhiyun };
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun U_BOOT_DRIVER(pic32_sdhci_drv) = {
75*4882a593Smuzhiyun .name = "pic32_sdhci",
76*4882a593Smuzhiyun .id = UCLASS_MMC,
77*4882a593Smuzhiyun .of_match = pic32_sdhci_ids,
78*4882a593Smuzhiyun .probe = pic32_sdhci_probe,
79*4882a593Smuzhiyun .priv_auto_alloc_size = sizeof(struct sdhci_host),
80*4882a593Smuzhiyun };
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