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// SPDX-License-Identifier: GPL-2.0+
/*
* MTK SATA platform driver
*
* (C) Copyright 2020
* Mediatek
*
* Author: Frank Wunderlich <frank-w@public-files.de>
* based on https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/ata/ahci_mtk.c
* Author: Ryder Lee <ryder.lee@mediatek.com>
*/
#include <common.h>
#include <ahci.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>
#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_ofdata_to_platdata(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->node, "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,
.ofdata_to_platdata = mtk_ahci_ofdata_to_platdata,
.ops = &scsi_ops,
.probe = mtk_ahci_probe,
.priv_auto_alloc_size = sizeof(struct mtk_ahci_priv),
};
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