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https://github.com/brain-hackers/u-boot-brain
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41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
129 lines
2.7 KiB
C
129 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* MTK SATA platform driver
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*
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* Copyright (C) 2020 MediaTek Inc.
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*
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* Author: Ryder Lee <ryder.lee@mediatek.com>
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* Author: Frank Wunderlich <frank-w@public-files.de>
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*/
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#include <common.h>
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#include <ahci.h>
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#include <asm/io.h>
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#include <dm.h>
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#include <dm/of_access.h>
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#include <generic-phy.h>
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#include <linux/err.h>
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#include <regmap.h>
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#include <reset.h>
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#include <sata.h>
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#include <scsi.h>
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#include <syscon.h>
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#define SYS_CFG 0x14
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#define SYS_CFG_SATA_MSK GENMASK(31, 30)
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#define SYS_CFG_SATA_EN BIT(31)
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struct mtk_ahci_priv {
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void *base;
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struct ahci_uc_priv ahci_priv;
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struct regmap *mode;
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struct reset_ctl_bulk rst_bulk;
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};
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static int mtk_ahci_bind(struct udevice *dev)
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{
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struct udevice *scsi_dev;
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return ahci_bind_scsi(dev, &scsi_dev);
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}
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static int mtk_ahci_ofdata_to_platdata(struct udevice *dev)
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{
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struct mtk_ahci_priv *priv = dev_get_priv(dev);
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priv->base = devfdt_remap_addr_index(dev, 0);
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return 0;
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}
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static int mtk_ahci_parse_property(struct ahci_uc_priv *hpriv,
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struct udevice *dev)
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{
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struct mtk_ahci_priv *plat = dev_get_priv(dev);
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const void *fdt = gd->fdt_blob;
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/* enable SATA function if needed */
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if (fdt_get_property(fdt, dev_of_offset(dev),
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"mediatek,phy-mode", NULL)) {
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plat->mode = syscon_regmap_lookup_by_phandle(dev,
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"mediatek,phy-mode");
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if (IS_ERR(plat->mode)) {
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dev_err(dev, "missing phy-mode phandle\n");
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return PTR_ERR(plat->mode);
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}
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regmap_update_bits(plat->mode, SYS_CFG,
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SYS_CFG_SATA_MSK, SYS_CFG_SATA_EN);
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}
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ofnode_read_u32(dev->node, "ports-implemented", &hpriv->port_map);
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return 0;
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}
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static int mtk_ahci_probe(struct udevice *dev)
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{
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struct mtk_ahci_priv *priv = dev_get_priv(dev);
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int ret;
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struct phy phy;
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ret = mtk_ahci_parse_property(&priv->ahci_priv, dev);
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if (ret)
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return ret;
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ret = reset_get_bulk(dev, &priv->rst_bulk);
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if (!ret) {
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reset_assert_bulk(&priv->rst_bulk);
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reset_deassert_bulk(&priv->rst_bulk);
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} else {
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dev_err(dev, "Failed to get reset: %d\n", ret);
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}
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ret = generic_phy_get_by_name(dev, "sata-phy", &phy);
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if (ret) {
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pr_err("can't get the phy from DT\n");
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return ret;
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}
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ret = generic_phy_init(&phy);
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if (ret) {
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pr_err("unable to initialize the sata phy\n");
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return ret;
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}
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ret = generic_phy_power_on(&phy);
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if (ret) {
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pr_err("unable to power on the sata phy\n");
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return ret;
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}
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return ahci_probe_scsi(dev, (ulong)priv->base);
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}
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static const struct udevice_id mtk_ahci_ids[] = {
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{ .compatible = "mediatek,mtk-ahci" },
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{ }
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};
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U_BOOT_DRIVER(mtk_ahci) = {
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.name = "mtk_ahci",
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.id = UCLASS_AHCI,
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.of_match = mtk_ahci_ids,
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.bind = mtk_ahci_bind,
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.ofdata_to_platdata = mtk_ahci_ofdata_to_platdata,
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.ops = &scsi_ops,
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.probe = mtk_ahci_probe,
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.priv_auto = sizeof(struct mtk_ahci_priv),
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};
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