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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * MTK SATA platform driver
- *
- * Copyright (C) 2020 MediaTek Inc.
- *
- * Author: Ryder Lee <ryder.lee@mediatek.com>
- * Author: Frank Wunderlich <frank-w@public-files.de>
- */
- #include <common.h>
- #include <ahci.h>
- #include <asm/global_data.h>
- #include <asm/io.h>
- #include <dm.h>
- #include <dm/of_access.h>
- #include <generic-phy.h>
- #include <linux/err.h>
- #include <regmap.h>
- #include <reset.h>
- #include <sata.h>
- #include <scsi.h>
- #include <syscon.h>
- #include <dm/device_compat.h>
- #define SYS_CFG 0x14
- #define SYS_CFG_SATA_MSK GENMASK(31, 30)
- #define SYS_CFG_SATA_EN BIT(31)
- struct mtk_ahci_priv {
- void *base;
- struct ahci_uc_priv ahci_priv;
- struct regmap *mode;
- struct reset_ctl_bulk rst_bulk;
- };
- static int mtk_ahci_bind(struct udevice *dev)
- {
- struct udevice *scsi_dev;
- return ahci_bind_scsi(dev, &scsi_dev);
- }
- static int mtk_ahci_of_to_plat(struct udevice *dev)
- {
- struct mtk_ahci_priv *priv = dev_get_priv(dev);
- priv->base = devfdt_remap_addr_index(dev, 0);
- return 0;
- }
- static int mtk_ahci_parse_property(struct ahci_uc_priv *hpriv,
- struct udevice *dev)
- {
- struct mtk_ahci_priv *plat = dev_get_priv(dev);
- const void *fdt = gd->fdt_blob;
- /* enable SATA function if needed */
- if (fdt_get_property(fdt, dev_of_offset(dev),
- "mediatek,phy-mode", NULL)) {
- plat->mode = syscon_regmap_lookup_by_phandle(dev,
- "mediatek,phy-mode");
- if (IS_ERR(plat->mode)) {
- dev_err(dev, "missing phy-mode phandle\n");
- return PTR_ERR(plat->mode);
- }
- regmap_update_bits(plat->mode, SYS_CFG,
- SYS_CFG_SATA_MSK, SYS_CFG_SATA_EN);
- }
- ofnode_read_u32(dev_ofnode(dev), "ports-implemented",
- &hpriv->port_map);
- return 0;
- }
- static int mtk_ahci_probe(struct udevice *dev)
- {
- struct mtk_ahci_priv *priv = dev_get_priv(dev);
- int ret;
- struct phy phy;
- ret = mtk_ahci_parse_property(&priv->ahci_priv, dev);
- if (ret)
- return ret;
- ret = reset_get_bulk(dev, &priv->rst_bulk);
- if (!ret) {
- reset_assert_bulk(&priv->rst_bulk);
- reset_deassert_bulk(&priv->rst_bulk);
- } else {
- dev_err(dev, "Failed to get reset: %d\n", ret);
- }
- ret = generic_phy_get_by_name(dev, "sata-phy", &phy);
- if (ret) {
- pr_err("can't get the phy from DT\n");
- return ret;
- }
- ret = generic_phy_init(&phy);
- if (ret) {
- pr_err("unable to initialize the sata phy\n");
- return ret;
- }
- ret = generic_phy_power_on(&phy);
- if (ret) {
- pr_err("unable to power on the sata phy\n");
- return ret;
- }
- return ahci_probe_scsi(dev, (ulong)priv->base);
- }
- static const struct udevice_id mtk_ahci_ids[] = {
- { .compatible = "mediatek,mtk-ahci" },
- { }
- };
- U_BOOT_DRIVER(mtk_ahci) = {
- .name = "mtk_ahci",
- .id = UCLASS_AHCI,
- .of_match = mtk_ahci_ids,
- .bind = mtk_ahci_bind,
- .of_to_plat = mtk_ahci_of_to_plat,
- .ops = &scsi_ops,
- .probe = mtk_ahci_probe,
- .priv_auto = sizeof(struct mtk_ahci_priv),
- };
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