Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 379 insertions, 0 deletions

diff --git a/drivers/pmdomain/amlogic/meson-gx-pwrc-vpu.c b/drivers/pmdomain/amlogic/meson-gx-pwrc-vpu.c
new file mode 100644
index 0000000000..33df520eab
--- /dev/null
+++ b/drivers/pmdomain/amlogic/meson-gx-pwrc-vpu.c
@@ -0,0 +1,379 @@
+/*
+ * Copyright (c) 2017 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/bitfield.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/reset.h>
+#include <linux/clk.h>
+#include <linux/module.h>
+
+/* AO Offsets */
+
+#define AO_RTI_GEN_PWR_SLEEP0		(0x3a << 2)
+
+#define GEN_PWR_VPU_HDMI		BIT(8)
+#define GEN_PWR_VPU_HDMI_ISO		BIT(9)
+
+/* HHI Offsets */
+
+#define HHI_MEM_PD_REG0			(0x40 << 2)
+#define HHI_VPU_MEM_PD_REG0		(0x41 << 2)
+#define HHI_VPU_MEM_PD_REG1		(0x42 << 2)
+#define HHI_VPU_MEM_PD_REG2		(0x4d << 2)
+
+struct meson_gx_pwrc_vpu {
+	struct generic_pm_domain genpd;
+	struct regmap *regmap_ao;
+	struct regmap *regmap_hhi;
+	struct reset_control *rstc;
+	struct clk *vpu_clk;
+	struct clk *vapb_clk;
+};
+
+static inline
+struct meson_gx_pwrc_vpu *genpd_to_pd(struct generic_pm_domain *d)
+{
+	return container_of(d, struct meson_gx_pwrc_vpu, genpd);
+}
+
+static int meson_gx_pwrc_vpu_power_off(struct generic_pm_domain *genpd)
+{
+	struct meson_gx_pwrc_vpu *pd = genpd_to_pd(genpd);
+	int i;
+
+	regmap_update_bits(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+			   GEN_PWR_VPU_HDMI_ISO, GEN_PWR_VPU_HDMI_ISO);
+	udelay(20);
+
+	/* Power Down Memories */
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG0,
+				   0x3 << i, 0x3 << i);
+		udelay(5);
+	}
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG1,
+				   0x3 << i, 0x3 << i);
+		udelay(5);
+	}
+	for (i = 8; i < 16; i++) {
+		regmap_update_bits(pd->regmap_hhi, HHI_MEM_PD_REG0,
+				   BIT(i), BIT(i));
+		udelay(5);
+	}
+	udelay(20);
+
+	regmap_update_bits(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+			   GEN_PWR_VPU_HDMI, GEN_PWR_VPU_HDMI);
+
+	msleep(20);
+
+	clk_disable_unprepare(pd->vpu_clk);
+	clk_disable_unprepare(pd->vapb_clk);
+
+	return 0;
+}
+
+static int meson_g12a_pwrc_vpu_power_off(struct generic_pm_domain *genpd)
+{
+	struct meson_gx_pwrc_vpu *pd = genpd_to_pd(genpd);
+	int i;
+
+	regmap_update_bits(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+			   GEN_PWR_VPU_HDMI_ISO, GEN_PWR_VPU_HDMI_ISO);
+	udelay(20);
+
+	/* Power Down Memories */
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG0,
+				   0x3 << i, 0x3 << i);
+		udelay(5);
+	}
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG1,
+				   0x3 << i, 0x3 << i);
+		udelay(5);
+	}
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG2,
+				   0x3 << i, 0x3 << i);
+		udelay(5);
+	}
+	for (i = 8; i < 16; i++) {
+		regmap_update_bits(pd->regmap_hhi, HHI_MEM_PD_REG0,
+				   BIT(i), BIT(i));
+		udelay(5);
+	}
+	udelay(20);
+
+	regmap_update_bits(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+			   GEN_PWR_VPU_HDMI, GEN_PWR_VPU_HDMI);
+
+	msleep(20);
+
+	clk_disable_unprepare(pd->vpu_clk);
+	clk_disable_unprepare(pd->vapb_clk);
+
+	return 0;
+}
+
+static int meson_gx_pwrc_vpu_setup_clk(struct meson_gx_pwrc_vpu *pd)
+{
+	int ret;
+
+	ret = clk_prepare_enable(pd->vpu_clk);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(pd->vapb_clk);
+	if (ret)
+		clk_disable_unprepare(pd->vpu_clk);
+
+	return ret;
+}
+
+static int meson_gx_pwrc_vpu_power_on(struct generic_pm_domain *genpd)
+{
+	struct meson_gx_pwrc_vpu *pd = genpd_to_pd(genpd);
+	int ret;
+	int i;
+
+	regmap_update_bits(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+			   GEN_PWR_VPU_HDMI, 0);
+	udelay(20);
+
+	/* Power Up Memories */
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG0,
+				   0x3 << i, 0);
+		udelay(5);
+	}
+
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG1,
+				   0x3 << i, 0);
+		udelay(5);
+	}
+
+	for (i = 8; i < 16; i++) {
+		regmap_update_bits(pd->regmap_hhi, HHI_MEM_PD_REG0,
+				   BIT(i), 0);
+		udelay(5);
+	}
+	udelay(20);
+
+	ret = reset_control_assert(pd->rstc);
+	if (ret)
+		return ret;
+
+	regmap_update_bits(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+			   GEN_PWR_VPU_HDMI_ISO, 0);
+
+	ret = reset_control_deassert(pd->rstc);
+	if (ret)
+		return ret;
+
+	ret = meson_gx_pwrc_vpu_setup_clk(pd);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int meson_g12a_pwrc_vpu_power_on(struct generic_pm_domain *genpd)
+{
+	struct meson_gx_pwrc_vpu *pd = genpd_to_pd(genpd);
+	int ret;
+	int i;
+
+	regmap_update_bits(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+			   GEN_PWR_VPU_HDMI, 0);
+	udelay(20);
+
+	/* Power Up Memories */
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG0,
+				   0x3 << i, 0);
+		udelay(5);
+	}
+
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG1,
+				   0x3 << i, 0);
+		udelay(5);
+	}
+
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(pd->regmap_hhi, HHI_VPU_MEM_PD_REG2,
+				   0x3 << i, 0);
+		udelay(5);
+	}
+
+	for (i = 8; i < 16; i++) {
+		regmap_update_bits(pd->regmap_hhi, HHI_MEM_PD_REG0,
+				   BIT(i), 0);
+		udelay(5);
+	}
+	udelay(20);
+
+	ret = reset_control_assert(pd->rstc);
+	if (ret)
+		return ret;
+
+	regmap_update_bits(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+			   GEN_PWR_VPU_HDMI_ISO, 0);
+
+	ret = reset_control_deassert(pd->rstc);
+	if (ret)
+		return ret;
+
+	ret = meson_gx_pwrc_vpu_setup_clk(pd);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static bool meson_gx_pwrc_vpu_get_power(struct meson_gx_pwrc_vpu *pd)
+{
+	u32 reg;
+
+	regmap_read(pd->regmap_ao, AO_RTI_GEN_PWR_SLEEP0, &reg);
+
+	return (reg & GEN_PWR_VPU_HDMI);
+}
+
+static struct meson_gx_pwrc_vpu vpu_hdmi_pd = {
+	.genpd = {
+		.name = "vpu_hdmi",
+		.power_off = meson_gx_pwrc_vpu_power_off,
+		.power_on = meson_gx_pwrc_vpu_power_on,
+	},
+};
+
+static struct meson_gx_pwrc_vpu vpu_hdmi_pd_g12a = {
+	.genpd = {
+		.name = "vpu_hdmi",
+		.power_off = meson_g12a_pwrc_vpu_power_off,
+		.power_on = meson_g12a_pwrc_vpu_power_on,
+	},
+};
+
+static int meson_gx_pwrc_vpu_probe(struct platform_device *pdev)
+{
+	const struct meson_gx_pwrc_vpu *vpu_pd_match;
+	struct regmap *regmap_ao, *regmap_hhi;
+	struct meson_gx_pwrc_vpu *vpu_pd;
+	struct device_node *parent_np;
+	struct reset_control *rstc;
+	struct clk *vpu_clk;
+	struct clk *vapb_clk;
+	bool powered_off;
+	int ret;
+
+	vpu_pd_match = of_device_get_match_data(&pdev->dev);
+	if (!vpu_pd_match) {
+		dev_err(&pdev->dev, "failed to get match data\n");
+		return -ENODEV;
+	}
+
+	vpu_pd = devm_kzalloc(&pdev->dev, sizeof(*vpu_pd), GFP_KERNEL);
+	if (!vpu_pd)
+		return -ENOMEM;
+
+	memcpy(vpu_pd, vpu_pd_match, sizeof(*vpu_pd));
+
+	parent_np = of_get_parent(pdev->dev.of_node);
+	regmap_ao = syscon_node_to_regmap(parent_np);
+	of_node_put(parent_np);
+	if (IS_ERR(regmap_ao)) {
+		dev_err(&pdev->dev, "failed to get regmap\n");
+		return PTR_ERR(regmap_ao);
+	}
+
+	regmap_hhi = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+						     "amlogic,hhi-sysctrl");
+	if (IS_ERR(regmap_hhi)) {
+		dev_err(&pdev->dev, "failed to get HHI regmap\n");
+		return PTR_ERR(regmap_hhi);
+	}
+
+	rstc = devm_reset_control_array_get_exclusive(&pdev->dev);
+	if (IS_ERR(rstc))
+		return dev_err_probe(&pdev->dev, PTR_ERR(rstc),
+				     "failed to get reset lines\n");
+
+	vpu_clk = devm_clk_get(&pdev->dev, "vpu");
+	if (IS_ERR(vpu_clk)) {
+		dev_err(&pdev->dev, "vpu clock request failed\n");
+		return PTR_ERR(vpu_clk);
+	}
+
+	vapb_clk = devm_clk_get(&pdev->dev, "vapb");
+	if (IS_ERR(vapb_clk)) {
+		dev_err(&pdev->dev, "vapb clock request failed\n");
+		return PTR_ERR(vapb_clk);
+	}
+
+	vpu_pd->regmap_ao = regmap_ao;
+	vpu_pd->regmap_hhi = regmap_hhi;
+	vpu_pd->rstc = rstc;
+	vpu_pd->vpu_clk = vpu_clk;
+	vpu_pd->vapb_clk = vapb_clk;
+
+	platform_set_drvdata(pdev, vpu_pd);
+
+	powered_off = meson_gx_pwrc_vpu_get_power(vpu_pd);
+
+	/* If already powered, sync the clock states */
+	if (!powered_off) {
+		ret = meson_gx_pwrc_vpu_setup_clk(vpu_pd);
+		if (ret)
+			return ret;
+	}
+
+	vpu_pd->genpd.flags = GENPD_FLAG_ALWAYS_ON;
+	pm_genpd_init(&vpu_pd->genpd, NULL, powered_off);
+
+	return of_genpd_add_provider_simple(pdev->dev.of_node,
+					    &vpu_pd->genpd);
+}
+
+static void meson_gx_pwrc_vpu_shutdown(struct platform_device *pdev)
+{
+	struct meson_gx_pwrc_vpu *vpu_pd = platform_get_drvdata(pdev);
+	bool powered_off;
+
+	powered_off = meson_gx_pwrc_vpu_get_power(vpu_pd);
+	if (!powered_off)
+		vpu_pd->genpd.power_off(&vpu_pd->genpd);
+}
+
+static const struct of_device_id meson_gx_pwrc_vpu_match_table[] = {
+	{ .compatible = "amlogic,meson-gx-pwrc-vpu", .data = &vpu_hdmi_pd },
+	{
+	  .compatible = "amlogic,meson-g12a-pwrc-vpu",
+	  .data = &vpu_hdmi_pd_g12a
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, meson_gx_pwrc_vpu_match_table);
+
+static struct platform_driver meson_gx_pwrc_vpu_driver = {
+	.probe	= meson_gx_pwrc_vpu_probe,
+	.shutdown = meson_gx_pwrc_vpu_shutdown,
+	.driver = {
+		.name		= "meson_gx_pwrc_vpu",
+		.of_match_table	= meson_gx_pwrc_vpu_match_table,
+	},
+};
+module_platform_driver(meson_gx_pwrc_vpu_driver);
+MODULE_LICENSE("GPL v2");