projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 102142c9 AP |
2 | /* |
| 3 | * Support of SDHCI for Microchip PIC32 SoC. | |
| 4 | * | |
| 5 | * Copyright (C) 2015 Microchip Technology Inc. | |
| 6 | * Andrei Pistirica <[email protected]> | |
| 102142c9 AP |
7 | */ |
| 8 | ||
| 4af0d7e8 | 9 | #include <dm.h> |
| 102142c9 | 10 | #include <sdhci.h> |
| 6978db36 | 11 | #include <clk.h> |
| 401d1c4f SG |
12 | #include <linux/errno.h> |
| 13 | #include <mach/pic32.h> | |
| 102142c9 | 14 | |
| 6978db36 JR |
15 | struct pic32_sdhci_plat { |
| 16 | struct mmc_config cfg; | |
| 17 | struct mmc mmc; | |
| 5e96217f JC |
18 | }; |
| 19 | ||
| 102142c9 AP |
20 | static int pic32_sdhci_probe(struct udevice *dev) |
| 21 | { | |
| 6978db36 | 22 | struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev); |
| c69cda25 | 23 | struct pic32_sdhci_plat *plat = dev_get_plat(dev); |
| 102142c9 | 24 | struct sdhci_host *host = dev_get_priv(dev); |
| 6978db36 JR |
25 | |
| 26 | struct clk clk; | |
| 27 | ulong clk_rate; | |
| 102142c9 AP |
28 | int ret; |
| 29 | ||
| 6978db36 JR |
30 | ret = clk_get_by_name(dev, "base_clk", &clk); |
| 31 | if (ret) | |
| 32 | return ret; | |
| 33 | ||
| 34 | clk_rate = clk_get_rate(&clk); | |
| 6978db36 JR |
35 | |
| 36 | if (IS_ERR_VALUE(clk_rate)) | |
| 37 | return clk_rate; | |
| 38 | ||
| 39 | host->ioaddr = dev_remap_addr(dev); | |
| 40 | ||
| 41 | if (!host->ioaddr) | |
| 102142c9 AP |
42 | return -EINVAL; |
| 43 | ||
| cacd1d2f | 44 | host->name = dev->name; |
| 6f88a3a5 | 45 | host->quirks = SDHCI_QUIRK_NO_HISPD_BIT; |
| 6978db36 JR |
46 | host->bus_width = dev_read_u32_default(dev, "bus-width", 4); |
| 47 | host->max_clk = clk_rate; | |
| 48 | ||
| 49 | host->mmc = &plat->mmc; | |
| 50 | host->mmc->dev = dev; | |
| 51 | ||
| 52 | ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0); | |
| 53 | if (ret) | |
| 102142c9 | 54 | return ret; |
| 102142c9 | 55 | |
| 6978db36 JR |
56 | host->mmc->priv = host; |
| 57 | upriv->mmc = host->mmc; | |
| 6d0e34bf | 58 | |
| 6978db36 | 59 | ret = sdhci_probe(dev); |
| cffe5d86 SG |
60 | if (ret) |
| 61 | return ret; | |
| 6978db36 JR |
62 | |
| 63 | if (!dev_read_bool(dev, "microchip,use-sdcd")) { | |
| 64 | // Use workaround 1 for erratum #15 by default | |
| 65 | u8 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); | |
| 66 | ctrl = (ctrl & ~SDHCI_CTRL_CD_TEST_INS) | SDHCI_CTRL_CD_TEST; | |
| 67 | sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL); | |
| 68 | } | |
| cffe5d86 SG |
69 | |
| 70 | return 0; | |
| 102142c9 AP |
71 | } |
| 72 | ||
| 6978db36 JR |
73 | static int pic32_sdhci_bind(struct udevice *dev) |
| 74 | { | |
| c69cda25 | 75 | struct pic32_sdhci_plat *plat = dev_get_plat(dev); |
| 6978db36 JR |
76 | |
| 77 | return sdhci_bind(dev, &plat->mmc, &plat->cfg); | |
| 78 | } | |
| 79 | ||
| 102142c9 AP |
80 | static const struct udevice_id pic32_sdhci_ids[] = { |
| 81 | { .compatible = "microchip,pic32mzda-sdhci" }, | |
| 82 | { } | |
| 83 | }; | |
| 84 | ||
| 85 | U_BOOT_DRIVER(pic32_sdhci_drv) = { | |
| 86 | .name = "pic32_sdhci", | |
| 87 | .id = UCLASS_MMC, | |
| 88 | .of_match = pic32_sdhci_ids, | |
| 6978db36 JR |
89 | .ops = &sdhci_ops, |
| 90 | .bind = pic32_sdhci_bind, | |
| 102142c9 | 91 | .probe = pic32_sdhci_probe, |
| 41575d8e | 92 | .priv_auto = sizeof(struct sdhci_host), |
| caa4daa2 | 93 | .plat_auto = sizeof(struct pic32_sdhci_plat) |
| 102142c9 | 94 | }; |