mirror of
https://github.com/torvalds/linux
synced 2024-10-09 12:54:52 +00:00
6aeec986f1
Samsung PHY drivers control the power to the SoC core components needed by their client devices (USB HCDs, SATA, camera ISP bridge, DP encoder) to properly operate. Disabling PHYs in runtime usually causes the client device to crash with external abort exception or similar issue due to lack of API to notify clients about PHY removal. This patch removes the possiblity to unbind Samsung Exynos PHY drivers in runtime. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
370 lines
11 KiB
C
370 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* 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>
|
|
*/
|
|
|
|
#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)
|
|
{
|
|
struct regmap *enable_map = state->regmaps[data->enable_map];
|
|
struct regmap *resetn_map = state->regmaps[data->resetn_map];
|
|
|
|
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_update_bits(enable_map, data->enable_reg,
|
|
data->enable_val, 0);
|
|
/* PHY reset */
|
|
if (on)
|
|
regmap_update_bits(resetn_map, data->resetn_reg,
|
|
data->resetn_val, data->resetn_val);
|
|
else
|
|
regmap_update_bits(resetn_map, data->resetn_reg,
|
|
data->resetn_val, 0);
|
|
/* enable in PMU sysreg */
|
|
if (on)
|
|
regmap_update_bits(enable_map, data->enable_reg,
|
|
data->enable_val, data->enable_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",
|
|
.suppress_bind_attrs = true,
|
|
}
|
|
};
|
|
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");
|