1 // SPDX-License-Identifier: GPL-2.0+
3 * MTK SATA platform driver
8 * Author: Frank Wunderlich <frank-w@public-files.de>
9 * based on https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/ata/ahci_mtk.c
10 * Author: Ryder Lee <ryder.lee@mediatek.com>
17 #include <dm/of_access.h>
18 #include <generic-phy.h>
19 #include <linux/err.h>
27 #define SYS_CFG_SATA_MSK GENMASK(31, 30)
28 #define SYS_CFG_SATA_EN BIT(31)
30 struct mtk_ahci_priv {
33 struct ahci_uc_priv ahci_priv;
35 struct reset_ctl_bulk rst_bulk;
38 static int mtk_ahci_bind(struct udevice *dev)
40 struct udevice *scsi_dev;
42 return ahci_bind_scsi(dev, &scsi_dev);
45 static int mtk_ahci_ofdata_to_platdata(struct udevice *dev)
47 struct mtk_ahci_priv *priv = dev_get_priv(dev);
49 priv->base = devfdt_remap_addr_index(dev, 0);
54 static int mtk_ahci_parse_property(struct ahci_uc_priv *hpriv,
57 struct mtk_ahci_priv *plat = dev_get_priv(dev);
58 const void *fdt = gd->fdt_blob;
60 /* enable SATA function if needed */
61 if (fdt_get_property(fdt, dev_of_offset(dev),
62 "mediatek,phy-mode", NULL)) {
63 plat->mode = syscon_regmap_lookup_by_phandle(dev,
65 if (IS_ERR(plat->mode)) {
66 dev_err(dev, "missing phy-mode phandle\n");
67 return PTR_ERR(plat->mode);
69 regmap_update_bits(plat->mode, SYS_CFG,
70 SYS_CFG_SATA_MSK, SYS_CFG_SATA_EN);
73 ofnode_read_u32(dev->node, "ports-implemented", &hpriv->port_map);
77 static int mtk_ahci_probe(struct udevice *dev)
79 struct mtk_ahci_priv *priv = dev_get_priv(dev);
83 ret = mtk_ahci_parse_property(&priv->ahci_priv, dev);
87 ret = reset_get_bulk(dev, &priv->rst_bulk);
89 reset_assert_bulk(&priv->rst_bulk);
90 reset_deassert_bulk(&priv->rst_bulk);
92 dev_err(dev, "Failed to get reset: %d\n", ret);
95 ret = generic_phy_get_by_name(dev, "sata-phy", &phy);
97 pr_err("can't get the phy from DT\n");
101 ret = generic_phy_init(&phy);
103 pr_err("unable to initialize the sata phy\n");
107 ret = generic_phy_power_on(&phy);
109 pr_err("unable to power on the sata phy\n");
113 return ahci_probe_scsi(dev, (ulong)priv->base);
116 static const struct udevice_id mtk_ahci_ids[] = {
117 { .compatible = "mediatek,mtk-ahci" },
121 U_BOOT_DRIVER(mtk_ahci) = {
124 .of_match = mtk_ahci_ids,
125 .bind = mtk_ahci_bind,
126 .ofdata_to_platdata = mtk_ahci_ofdata_to_platdata,
128 .probe = mtk_ahci_probe,
129 .priv_auto_alloc_size = sizeof(struct mtk_ahci_priv),