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