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path: root/drivers/phy/samsung/phy-exynos-mipi-video.c
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Diffstat (limited to 'drivers/phy/samsung/phy-exynos-mipi-video.c')
-rw-r--r--drivers/phy/samsung/phy-exynos-mipi-video.c377
1 files changed, 377 insertions, 0 deletions
diff --git a/drivers/phy/samsung/phy-exynos-mipi-video.c b/drivers/phy/samsung/phy-exynos-mipi-video.c
new file mode 100644
index 000000000000..c198886f80a3
--- /dev/null
+++ b/drivers/phy/samsung/phy-exynos-mipi-video.c
@@ -0,0 +1,377 @@
+/*
+ * Samsung S5P/EXYNOS SoC series MIPI CSIS/DSIM DPHY driver
+ *
+ * Copyright (C) 2013,2016 Samsung Electronics Co., Ltd.
+ * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/spinlock.h>
+#include <linux/soc/samsung/exynos-regs-pmu.h>
+#include <linux/mfd/syscon.h>
+
+enum exynos_mipi_phy_id {
+ EXYNOS_MIPI_PHY_ID_NONE = -1,
+ EXYNOS_MIPI_PHY_ID_CSIS0,
+ EXYNOS_MIPI_PHY_ID_DSIM0,
+ EXYNOS_MIPI_PHY_ID_CSIS1,
+ EXYNOS_MIPI_PHY_ID_DSIM1,
+ EXYNOS_MIPI_PHY_ID_CSIS2,
+ EXYNOS_MIPI_PHYS_NUM
+};
+
+enum exynos_mipi_phy_regmap_id {
+ EXYNOS_MIPI_REGMAP_PMU,
+ EXYNOS_MIPI_REGMAP_DISP,
+ EXYNOS_MIPI_REGMAP_CAM0,
+ EXYNOS_MIPI_REGMAP_CAM1,
+ EXYNOS_MIPI_REGMAPS_NUM
+};
+
+struct mipi_phy_device_desc {
+ int num_phys;
+ int num_regmaps;
+ const char *regmap_names[EXYNOS_MIPI_REGMAPS_NUM];
+ struct exynos_mipi_phy_desc {
+ enum exynos_mipi_phy_id coupled_phy_id;
+ u32 enable_val;
+ unsigned int enable_reg;
+ enum exynos_mipi_phy_regmap_id enable_map;
+ u32 resetn_val;
+ unsigned int resetn_reg;
+ enum exynos_mipi_phy_regmap_id resetn_map;
+ } phys[EXYNOS_MIPI_PHYS_NUM];
+};
+
+static const struct mipi_phy_device_desc s5pv210_mipi_phy = {
+ .num_regmaps = 1,
+ .regmap_names = {"syscon"},
+ .num_phys = 4,
+ .phys = {
+ {
+ /* EXYNOS_MIPI_PHY_ID_CSIS0 */
+ .coupled_phy_id = EXYNOS_MIPI_PHY_ID_DSIM0,
+ .enable_val = EXYNOS4_PHY_ENABLE,
+ .enable_reg = EXYNOS4_MIPI_PHY_CONTROL(0),
+ .enable_map = EXYNOS_MIPI_REGMAP_PMU,
+ .resetn_val = EXYNOS4_MIPI_PHY_SRESETN,
+ .resetn_reg = EXYNOS4_MIPI_PHY_CONTROL(0),
+ .resetn_map = EXYNOS_MIPI_REGMAP_PMU,
+ }, {
+ /* EXYNOS_MIPI_PHY_ID_DSIM0 */
+ .coupled_phy_id = EXYNOS_MIPI_PHY_ID_CSIS0,
+ .enable_val = EXYNOS4_PHY_ENABLE,
+ .enable_reg = EXYNOS4_MIPI_PHY_CONTROL(0),
+ .enable_map = EXYNOS_MIPI_REGMAP_PMU,
+ .resetn_val = EXYNOS4_MIPI_PHY_MRESETN,
+ .resetn_reg = EXYNOS4_MIPI_PHY_CONTROL(0),
+ .resetn_map = EXYNOS_MIPI_REGMAP_PMU,
+ }, {
+ /* EXYNOS_MIPI_PHY_ID_CSIS1 */
+ .coupled_phy_id = EXYNOS_MIPI_PHY_ID_DSIM1,
+ .enable_val = EXYNOS4_PHY_ENABLE,
+ .enable_reg = EXYNOS4_MIPI_PHY_CONTROL(1),
+ .enable_map = EXYNOS_MIPI_REGMAP_PMU,
+ .resetn_val = EXYNOS4_MIPI_PHY_SRESETN,
+ .resetn_reg = EXYNOS4_MIPI_PHY_CONTROL(1),
+ .resetn_map = EXYNOS_MIPI_REGMAP_PMU,
+ }, {
+ /* EXYNOS_MIPI_PHY_ID_DSIM1 */
+ .coupled_phy_id = EXYNOS_MIPI_PHY_ID_CSIS1,
+ .enable_val = EXYNOS4_PHY_ENABLE,
+ .enable_reg = EXYNOS4_MIPI_PHY_CONTROL(1),
+ .enable_map = EXYNOS_MIPI_REGMAP_PMU,
+ .resetn_val = EXYNOS4_MIPI_PHY_MRESETN,
+ .resetn_reg = EXYNOS4_MIPI_PHY_CONTROL(1),
+ .resetn_map = EXYNOS_MIPI_REGMAP_PMU,
+ },
+ },
+};
+
+static const struct mipi_phy_device_desc exynos5420_mipi_phy = {
+ .num_regmaps = 1,
+ .regmap_names = {"syscon"},
+ .num_phys = 5,
+ .phys = {
+ {
+ /* EXYNOS_MIPI_PHY_ID_CSIS0 */
+ .coupled_phy_id = EXYNOS_MIPI_PHY_ID_DSIM0,
+ .enable_val = EXYNOS4_PHY_ENABLE,
+ .enable_reg = EXYNOS5420_MIPI_PHY_CONTROL(0),
+ .enable_map = EXYNOS_MIPI_REGMAP_PMU,
+ .resetn_val = EXYNOS4_MIPI_PHY_SRESETN,
+ .resetn_reg = EXYNOS5420_MIPI_PHY_CONTROL(0),
+ .resetn_map = EXYNOS_MIPI_REGMAP_PMU,
+ }, {
+ /* EXYNOS_MIPI_PHY_ID_DSIM0 */
+ .coupled_phy_id = EXYNOS_MIPI_PHY_ID_CSIS0,
+ .enable_val = EXYNOS4_PHY_ENABLE,
+ .enable_reg = EXYNOS5420_MIPI_PHY_CONTROL(0),
+ .enable_map = EXYNOS_MIPI_REGMAP_PMU,
+ .resetn_val = EXYNOS4_MIPI_PHY_MRESETN,
+ .resetn_reg = EXYNOS5420_MIPI_PHY_CONTROL(0),
+ .resetn_map = EXYNOS_MIPI_REGMAP_PMU,
+ }, {
+ /* EXYNOS_MIPI_PHY_ID_CSIS1 */
+ .coupled_phy_id = EXYNOS_MIPI_PHY_ID_DSIM1,
+ .enable_val = EXYNOS4_PHY_ENABLE,
+ .enable_reg = EXYNOS5420_MIPI_PHY_CONTROL(1),
+ .enable_map = EXYNOS_MIPI_REGMAP_PMU,
+ .resetn_val = EXYNOS4_MIPI_PHY_SRESETN,
+ .resetn_reg = EXYNOS5420_MIPI_PHY_CONTROL(1),
+ .resetn_map = EXYNOS_MIPI_REGMAP_PMU,
+ }, {
+ /* EXYNOS_MIPI_PHY_ID_DSIM1 */
+ .coupled_phy_id = EXYNOS_MIPI_PHY_ID_CSIS1,
+ .enable_val = EXYNOS4_PHY_ENABLE,
+ .enable_reg = EXYNOS5420_MIPI_PHY_CONTROL(1),
+ .enable_map = EXYNOS_MIPI_REGMAP_PMU,
+ .resetn_val = EXYNOS4_MIPI_PHY_MRESETN,
+ .resetn_reg = EXYNOS5420_MIPI_PHY_CONTROL(1),
+ .resetn_map = EXYNOS_MIPI_REGMAP_PMU,
+ }, {
+ /* EXYNOS_MIPI_PHY_ID_CSIS2 */
+ .coupled_phy_id = EXYNOS_MIPI_PHY_ID_NONE,
+ .enable_val = EXYNOS4_PHY_ENABLE,
+ .enable_reg = EXYNOS5420_MIPI_PHY_CONTROL(2),
+ .enable_map = EXYNOS_MIPI_REGMAP_PMU,
+ .resetn_val = EXYNOS4_MIPI_PHY_SRESETN,
+ .resetn_reg = EXYNOS5420_MIPI_PHY_CONTROL(2),
+ .resetn_map = EXYNOS_MIPI_REGMAP_PMU,
+ },
+ },
+};
+
+#define EXYNOS5433_SYSREG_DISP_MIPI_PHY 0x100C
+#define EXYNOS5433_SYSREG_CAM0_MIPI_DPHY_CON 0x1014
+#define EXYNOS5433_SYSREG_CAM1_MIPI_DPHY_CON 0x1020
+
+static const struct mipi_phy_device_desc exynos5433_mipi_phy = {
+ .num_regmaps = 4,
+ .regmap_names = {
+ "samsung,pmu-syscon",
+ "samsung,disp-sysreg",
+ "samsung,cam0-sysreg",
+ "samsung,cam1-sysreg"
+ },
+ .num_phys = 5,
+ .phys = {
+ {
+ /* EXYNOS_MIPI_PHY_ID_CSIS0 */
+ .coupled_phy_id = EXYNOS_MIPI_PHY_ID_DSIM0,
+ .enable_val = EXYNOS4_PHY_ENABLE,
+ .enable_reg = EXYNOS4_MIPI_PHY_CONTROL(0),
+ .enable_map = EXYNOS_MIPI_REGMAP_PMU,
+ .resetn_val = BIT(0),
+ .resetn_reg = EXYNOS5433_SYSREG_CAM0_MIPI_DPHY_CON,
+ .resetn_map = EXYNOS_MIPI_REGMAP_CAM0,
+ }, {
+ /* EXYNOS_MIPI_PHY_ID_DSIM0 */
+ .coupled_phy_id = EXYNOS_MIPI_PHY_ID_CSIS0,
+ .enable_val = EXYNOS4_PHY_ENABLE,
+ .enable_reg = EXYNOS4_MIPI_PHY_CONTROL(0),
+ .enable_map = EXYNOS_MIPI_REGMAP_PMU,
+ .resetn_val = BIT(0),
+ .resetn_reg = EXYNOS5433_SYSREG_DISP_MIPI_PHY,
+ .resetn_map = EXYNOS_MIPI_REGMAP_DISP,
+ }, {
+ /* EXYNOS_MIPI_PHY_ID_CSIS1 */
+ .coupled_phy_id = EXYNOS_MIPI_PHY_ID_NONE,
+ .enable_val = EXYNOS4_PHY_ENABLE,
+ .enable_reg = EXYNOS4_MIPI_PHY_CONTROL(1),
+ .enable_map = EXYNOS_MIPI_REGMAP_PMU,
+ .resetn_val = BIT(1),
+ .resetn_reg = EXYNOS5433_SYSREG_CAM0_MIPI_DPHY_CON,
+ .resetn_map = EXYNOS_MIPI_REGMAP_CAM0,
+ }, {
+ /* EXYNOS_MIPI_PHY_ID_DSIM1 */
+ .coupled_phy_id = EXYNOS_MIPI_PHY_ID_NONE,
+ .enable_val = EXYNOS4_PHY_ENABLE,
+ .enable_reg = EXYNOS4_MIPI_PHY_CONTROL(1),
+ .enable_map = EXYNOS_MIPI_REGMAP_PMU,
+ .resetn_val = BIT(1),
+ .resetn_reg = EXYNOS5433_SYSREG_DISP_MIPI_PHY,
+ .resetn_map = EXYNOS_MIPI_REGMAP_DISP,
+ }, {
+ /* EXYNOS_MIPI_PHY_ID_CSIS2 */
+ .coupled_phy_id = EXYNOS_MIPI_PHY_ID_NONE,
+ .enable_val = EXYNOS4_PHY_ENABLE,
+ .enable_reg = EXYNOS4_MIPI_PHY_CONTROL(2),
+ .enable_map = EXYNOS_MIPI_REGMAP_PMU,
+ .resetn_val = BIT(0),
+ .resetn_reg = EXYNOS5433_SYSREG_CAM1_MIPI_DPHY_CON,
+ .resetn_map = EXYNOS_MIPI_REGMAP_CAM1,
+ },
+ },
+};
+
+struct exynos_mipi_video_phy {
+ struct regmap *regmaps[EXYNOS_MIPI_REGMAPS_NUM];
+ int num_phys;
+ struct video_phy_desc {
+ struct phy *phy;
+ unsigned int index;
+ const struct exynos_mipi_phy_desc *data;
+ } phys[EXYNOS_MIPI_PHYS_NUM];
+ spinlock_t slock;
+};
+
+static int __set_phy_state(const struct exynos_mipi_phy_desc *data,
+ struct exynos_mipi_video_phy *state, unsigned int on)
+{
+ u32 val;
+
+ spin_lock(&state->slock);
+
+ /* disable in PMU sysreg */
+ if (!on && data->coupled_phy_id >= 0 &&
+ state->phys[data->coupled_phy_id].phy->power_count == 0) {
+ regmap_read(state->regmaps[data->enable_map], data->enable_reg,
+ &val);
+ val &= ~data->enable_val;
+ regmap_write(state->regmaps[data->enable_map], data->enable_reg,
+ val);
+ }
+
+ /* PHY reset */
+ regmap_read(state->regmaps[data->resetn_map], data->resetn_reg, &val);
+ val = on ? (val | data->resetn_val) : (val & ~data->resetn_val);
+ regmap_write(state->regmaps[data->resetn_map], data->resetn_reg, val);
+
+ /* enable in PMU sysreg */
+ if (on) {
+ regmap_read(state->regmaps[data->enable_map], data->enable_reg,
+ &val);
+ val |= data->enable_val;
+ regmap_write(state->regmaps[data->enable_map], data->enable_reg,
+ val);
+ }
+
+ spin_unlock(&state->slock);
+
+ return 0;
+}
+
+#define to_mipi_video_phy(desc) \
+ container_of((desc), struct exynos_mipi_video_phy, phys[(desc)->index])
+
+static int exynos_mipi_video_phy_power_on(struct phy *phy)
+{
+ struct video_phy_desc *phy_desc = phy_get_drvdata(phy);
+ struct exynos_mipi_video_phy *state = to_mipi_video_phy(phy_desc);
+
+ return __set_phy_state(phy_desc->data, state, 1);
+}
+
+static int exynos_mipi_video_phy_power_off(struct phy *phy)
+{
+ struct video_phy_desc *phy_desc = phy_get_drvdata(phy);
+ struct exynos_mipi_video_phy *state = to_mipi_video_phy(phy_desc);
+
+ return __set_phy_state(phy_desc->data, state, 0);
+}
+
+static struct phy *exynos_mipi_video_phy_xlate(struct device *dev,
+ struct of_phandle_args *args)
+{
+ struct exynos_mipi_video_phy *state = dev_get_drvdata(dev);
+
+ if (WARN_ON(args->args[0] >= state->num_phys))
+ return ERR_PTR(-ENODEV);
+
+ return state->phys[args->args[0]].phy;
+}
+
+static const struct phy_ops exynos_mipi_video_phy_ops = {
+ .power_on = exynos_mipi_video_phy_power_on,
+ .power_off = exynos_mipi_video_phy_power_off,
+ .owner = THIS_MODULE,
+};
+
+static int exynos_mipi_video_phy_probe(struct platform_device *pdev)
+{
+ const struct mipi_phy_device_desc *phy_dev;
+ struct exynos_mipi_video_phy *state;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct phy_provider *phy_provider;
+ unsigned int i;
+
+ phy_dev = of_device_get_match_data(dev);
+ if (!phy_dev)
+ return -ENODEV;
+
+ state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return -ENOMEM;
+
+ for (i = 0; i < phy_dev->num_regmaps; i++) {
+ state->regmaps[i] = syscon_regmap_lookup_by_phandle(np,
+ phy_dev->regmap_names[i]);
+ if (IS_ERR(state->regmaps[i]))
+ return PTR_ERR(state->regmaps[i]);
+ }
+ state->num_phys = phy_dev->num_phys;
+ spin_lock_init(&state->slock);
+
+ dev_set_drvdata(dev, state);
+
+ for (i = 0; i < state->num_phys; i++) {
+ struct phy *phy = devm_phy_create(dev, NULL,
+ &exynos_mipi_video_phy_ops);
+ if (IS_ERR(phy)) {
+ dev_err(dev, "failed to create PHY %d\n", i);
+ return PTR_ERR(phy);
+ }
+
+ state->phys[i].phy = phy;
+ state->phys[i].index = i;
+ state->phys[i].data = &phy_dev->phys[i];
+ phy_set_drvdata(phy, &state->phys[i]);
+ }
+
+ phy_provider = devm_of_phy_provider_register(dev,
+ exynos_mipi_video_phy_xlate);
+
+ return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static const struct of_device_id exynos_mipi_video_phy_of_match[] = {
+ {
+ .compatible = "samsung,s5pv210-mipi-video-phy",
+ .data = &s5pv210_mipi_phy,
+ }, {
+ .compatible = "samsung,exynos5420-mipi-video-phy",
+ .data = &exynos5420_mipi_phy,
+ }, {
+ .compatible = "samsung,exynos5433-mipi-video-phy",
+ .data = &exynos5433_mipi_phy,
+ },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, exynos_mipi_video_phy_of_match);
+
+static struct platform_driver exynos_mipi_video_phy_driver = {
+ .probe = exynos_mipi_video_phy_probe,
+ .driver = {
+ .of_match_table = exynos_mipi_video_phy_of_match,
+ .name = "exynos-mipi-video-phy",
+ }
+};
+module_platform_driver(exynos_mipi_video_phy_driver);
+
+MODULE_DESCRIPTION("Samsung S5P/EXYNOS SoC MIPI CSI-2/DSI PHY driver");
+MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
+MODULE_LICENSE("GPL v2");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.