Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 200 insertions, 0 deletions

diff --git a/drivers/phy/mediatek/phy-mtk-mipi-dsi.c b/drivers/phy/mediatek/phy-mtk-mipi-dsi.c
new file mode 100644
index 0000000000..065ea62609
--- /dev/null
+++ b/drivers/phy/mediatek/phy-mtk-mipi-dsi.c
@@ -0,0 +1,200 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ */
+
+#include "phy-mtk-mipi-dsi.h"
+
+inline struct mtk_mipi_tx *mtk_mipi_tx_from_clk_hw(struct clk_hw *hw)
+{
+	return container_of(hw, struct mtk_mipi_tx, pll_hw);
+}
+
+int mtk_mipi_tx_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+			     unsigned long parent_rate)
+{
+	struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
+
+	dev_dbg(mipi_tx->dev, "set rate: %lu Hz\n", rate);
+
+	mipi_tx->data_rate = rate;
+
+	return 0;
+}
+
+unsigned long mtk_mipi_tx_pll_recalc_rate(struct clk_hw *hw,
+					  unsigned long parent_rate)
+{
+	struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
+
+	return mipi_tx->data_rate;
+}
+
+static int mtk_mipi_tx_power_on(struct phy *phy)
+{
+	struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
+	int ret;
+
+	/* Power up core and enable PLL */
+	ret = clk_prepare_enable(mipi_tx->pll_hw.clk);
+	if (ret < 0)
+		return ret;
+
+	/* Enable DSI Lane LDO outputs, disable pad tie low */
+	mipi_tx->driver_data->mipi_tx_enable_signal(phy);
+	return 0;
+}
+
+static int mtk_mipi_tx_power_off(struct phy *phy)
+{
+	struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
+
+	/* Enable pad tie low, disable DSI Lane LDO outputs */
+	mipi_tx->driver_data->mipi_tx_disable_signal(phy);
+
+	/* Disable PLL and power down core */
+	clk_disable_unprepare(mipi_tx->pll_hw.clk);
+
+	return 0;
+}
+
+static const struct phy_ops mtk_mipi_tx_ops = {
+	.power_on = mtk_mipi_tx_power_on,
+	.power_off = mtk_mipi_tx_power_off,
+	.owner = THIS_MODULE,
+};
+
+static void mtk_mipi_tx_get_calibration_datal(struct mtk_mipi_tx *mipi_tx)
+{
+	struct nvmem_cell *cell;
+	size_t len;
+	u32 *buf;
+
+	cell = nvmem_cell_get(mipi_tx->dev, "calibration-data");
+	if (IS_ERR(cell)) {
+		dev_info(mipi_tx->dev, "can't get nvmem_cell_get, ignore it\n");
+		return;
+	}
+	buf = (u32 *)nvmem_cell_read(cell, &len);
+	nvmem_cell_put(cell);
+
+	if (IS_ERR(buf)) {
+		dev_info(mipi_tx->dev, "can't get data, ignore it\n");
+		return;
+	}
+
+	if (len < 3 * sizeof(u32)) {
+		dev_info(mipi_tx->dev, "invalid calibration data\n");
+		kfree(buf);
+		return;
+	}
+
+	mipi_tx->rt_code[0] = ((buf[0] >> 6 & 0x1f) << 5) |
+			       (buf[0] >> 11 & 0x1f);
+	mipi_tx->rt_code[1] = ((buf[1] >> 27 & 0x1f) << 5) |
+			       (buf[0] >> 1 & 0x1f);
+	mipi_tx->rt_code[2] = ((buf[1] >> 17 & 0x1f) << 5) |
+			       (buf[1] >> 22 & 0x1f);
+	mipi_tx->rt_code[3] = ((buf[1] >> 7 & 0x1f) << 5) |
+			       (buf[1] >> 12 & 0x1f);
+	mipi_tx->rt_code[4] = ((buf[2] >> 27 & 0x1f) << 5) |
+			       (buf[1] >> 2 & 0x1f);
+	kfree(buf);
+}
+
+static int mtk_mipi_tx_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mtk_mipi_tx *mipi_tx;
+	const char *ref_clk_name;
+	struct clk *ref_clk;
+	struct clk_init_data clk_init = {
+		.num_parents = 1,
+		.parent_names = (const char * const *)&ref_clk_name,
+		.flags = CLK_SET_RATE_GATE,
+	};
+	struct phy *phy;
+	struct phy_provider *phy_provider;
+	int ret;
+
+	mipi_tx = devm_kzalloc(dev, sizeof(*mipi_tx), GFP_KERNEL);
+	if (!mipi_tx)
+		return -ENOMEM;
+
+	mipi_tx->driver_data = of_device_get_match_data(dev);
+	if (!mipi_tx->driver_data)
+		return -ENODEV;
+
+	mipi_tx->regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(mipi_tx->regs))
+		return PTR_ERR(mipi_tx->regs);
+
+	ref_clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(ref_clk))
+		return dev_err_probe(dev, PTR_ERR(ref_clk),
+				     "Failed to get reference clock\n");
+
+	ret = of_property_read_u32(dev->of_node, "drive-strength-microamp",
+				   &mipi_tx->mipitx_drive);
+	/* If can't get the "mipi_tx->mipitx_drive", set it default 0x8 */
+	if (ret < 0)
+		mipi_tx->mipitx_drive = 4600;
+
+	/* check the mipitx_drive valid */
+	if (mipi_tx->mipitx_drive > 6000 || mipi_tx->mipitx_drive < 3000) {
+		dev_warn(dev, "drive-strength-microamp is invalid %d, not in 3000 ~ 6000\n",
+			 mipi_tx->mipitx_drive);
+		mipi_tx->mipitx_drive = clamp_val(mipi_tx->mipitx_drive, 3000,
+						  6000);
+	}
+
+	ref_clk_name = __clk_get_name(ref_clk);
+
+	ret = of_property_read_string(dev->of_node, "clock-output-names",
+				      &clk_init.name);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "Failed to read clock-output-names\n");
+
+	clk_init.ops = mipi_tx->driver_data->mipi_tx_clk_ops;
+
+	mipi_tx->pll_hw.init = &clk_init;
+	ret = devm_clk_hw_register(dev, &mipi_tx->pll_hw);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to register PLL\n");
+
+	phy = devm_phy_create(dev, NULL, &mtk_mipi_tx_ops);
+	if (IS_ERR(phy))
+		return dev_err_probe(dev, PTR_ERR(phy), "Failed to create MIPI D-PHY\n");
+
+	phy_set_drvdata(phy, mipi_tx);
+
+	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+	if (IS_ERR(phy_provider))
+		return PTR_ERR(phy_provider);
+
+	mipi_tx->dev = dev;
+
+	mtk_mipi_tx_get_calibration_datal(mipi_tx);
+
+	return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, &mipi_tx->pll_hw);
+}
+
+static const struct of_device_id mtk_mipi_tx_match[] = {
+	{ .compatible = "mediatek,mt2701-mipi-tx", .data = &mt2701_mipitx_data },
+	{ .compatible = "mediatek,mt8173-mipi-tx", .data = &mt8173_mipitx_data },
+	{ .compatible = "mediatek,mt8183-mipi-tx", .data = &mt8183_mipitx_data },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mtk_mipi_tx_match);
+
+static struct platform_driver mtk_mipi_tx_driver = {
+	.probe = mtk_mipi_tx_probe,
+	.driver = {
+		.name = "mediatek-mipi-tx",
+		.of_match_table = mtk_mipi_tx_match,
+	},
+};
+module_platform_driver(mtk_mipi_tx_driver);
+
+MODULE_DESCRIPTION("MediaTek MIPI TX Driver");
+MODULE_LICENSE("GPL v2");