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Subject[PATCH v5 04/16] media: rkisp1: add Rockchip MIPI Synopsys DPHY driver
Date
From: Jacob Chen <jacob2.chen@rock-chips.com>

This commit adds a subdev driver for Rockchip MIPI Synopsys DPHY driver

Signed-off-by: Jacob Chen <jacob2.chen@rock-chips.com>
Signed-off-by: Shunqian Zheng <zhengsq@rock-chips.com>
Signed-off-by: Tomasz Figa <tfiga@chromium.org>
---
.../media/platform/rockchip/isp1/mipi_dphy_sy.c | 787 +++++++++++++++++++++
1 file changed, 787 insertions(+)
create mode 100644 drivers/media/platform/rockchip/isp1/mipi_dphy_sy.c

diff --git a/drivers/media/platform/rockchip/isp1/mipi_dphy_sy.c b/drivers/media/platform/rockchip/isp1/mipi_dphy_sy.c
new file mode 100644
index 0000000..9421183
--- /dev/null
+++ b/drivers/media/platform/rockchip/isp1/mipi_dphy_sy.c
@@ -0,0 +1,787 @@
+/*
+ * Rockchip MIPI Synopsys DPHY driver
+ *
+ * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <media/media-entity.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+#define RK3288_GRF_SOC_CON6 0x025c
+#define RK3288_GRF_SOC_CON8 0x0264
+#define RK3288_GRF_SOC_CON9 0x0268
+#define RK3288_GRF_SOC_CON10 0x026c
+#define RK3288_GRF_SOC_CON14 0x027c
+#define RK3288_GRF_SOC_STATUS21 0x02d4
+#define RK3288_GRF_IO_VSEL 0x0380
+#define RK3288_GRF_SOC_CON15 0x03a4
+
+#define RK3399_GRF_SOC_CON9 0x6224
+#define RK3399_GRF_SOC_CON21 0x6254
+#define RK3399_GRF_SOC_CON22 0x6258
+#define RK3399_GRF_SOC_CON23 0x625c
+#define RK3399_GRF_SOC_CON24 0x6260
+#define RK3399_GRF_SOC_CON25 0x6264
+#define RK3399_GRF_SOC_STATUS1 0xe2a4
+
+#define CLOCK_LANE_HS_RX_CONTROL 0x34
+#define LANE0_HS_RX_CONTROL 0x44
+#define LANE1_HS_RX_CONTROL 0x54
+#define LANE2_HS_RX_CONTROL 0x84
+#define LANE3_HS_RX_CONTROL 0x94
+#define HS_RX_DATA_LANES_THS_SETTLE__CONTROL 0x75
+
+#define HIWORD_UPDATE(val, mask, shift) \
+ ((val) << (shift) | (mask) << ((shift) + 16))
+
+enum mipi_dphy_sy_pads {
+ MIPI_DPHY_SY_PAD_SINK = 0,
+ MIPI_DPHY_SY_PAD_SOURCE,
+ MIPI_DPHY_SY_PADS_NUM,
+};
+
+enum dphy_reg_id {
+ GRF_DPHY_RX0_TURNDISABLE = 0,
+ GRF_DPHY_RX0_FORCERXMODE,
+ GRF_DPHY_RX0_FORCETXSTOPMODE,
+ GRF_DPHY_RX0_ENABLE,
+ GRF_DPHY_RX0_TESTCLR,
+ GRF_DPHY_RX0_TESTCLK,
+ GRF_DPHY_RX0_TESTEN,
+ GRF_DPHY_RX0_TESTDIN,
+ GRF_DPHY_RX0_TURNREQUEST,
+ GRF_DPHY_RX0_TESTDOUT,
+ GRF_DPHY_TX0_TURNDISABLE,
+ GRF_DPHY_TX0_FORCERXMODE,
+ GRF_DPHY_TX0_FORCETXSTOPMODE,
+ GRF_DPHY_TX0_TURNREQUEST,
+ GRF_DPHY_TX1RX1_TURNDISABLE,
+ GRF_DPHY_TX1RX1_FORCERXMODE,
+ GRF_DPHY_TX1RX1_FORCETXSTOPMODE,
+ GRF_DPHY_TX1RX1_ENABLE,
+ GRF_DPHY_TX1RX1_MASTERSLAVEZ,
+ GRF_DPHY_TX1RX1_BASEDIR,
+ GRF_DPHY_TX1RX1_ENABLECLK,
+ GRF_DPHY_TX1RX1_TURNREQUEST,
+ GRF_DPHY_RX1_SRC_SEL,
+ /* rk3288 only */
+ GRF_CON_DISABLE_ISP,
+ GRF_CON_ISP_DPHY_SEL,
+ GRF_DSI_CSI_TESTBUS_SEL,
+ GRF_DVP_V18SEL,
+ /* below is for rk3399 only */
+ GRF_DPHY_RX0_CLK_INV_SEL,
+ GRF_DPHY_RX1_CLK_INV_SEL,
+};
+
+struct dphy_reg {
+ u32 offset;
+ u32 mask;
+ u32 shift;
+};
+
+#define PHY_REG(_offset, _width, _shift) \
+ { .offset = _offset, .mask = BIT(_width) - 1, .shift = _shift, }
+
+static const struct dphy_reg rk3399_grf_dphy_regs[] = {
+ [GRF_DPHY_RX0_TURNREQUEST] = PHY_REG(RK3399_GRF_SOC_CON9, 4, 0),
+ [GRF_DPHY_RX0_CLK_INV_SEL] = PHY_REG(RK3399_GRF_SOC_CON9, 1, 10),
+ [GRF_DPHY_RX1_CLK_INV_SEL] = PHY_REG(RK3399_GRF_SOC_CON9, 1, 11),
+ [GRF_DPHY_RX0_ENABLE] = PHY_REG(RK3399_GRF_SOC_CON21, 4, 0),
+ [GRF_DPHY_RX0_FORCERXMODE] = PHY_REG(RK3399_GRF_SOC_CON21, 4, 4),
+ [GRF_DPHY_RX0_FORCETXSTOPMODE] = PHY_REG(RK3399_GRF_SOC_CON21, 4, 8),
+ [GRF_DPHY_RX0_TURNDISABLE] = PHY_REG(RK3399_GRF_SOC_CON21, 4, 12),
+ [GRF_DPHY_TX0_FORCERXMODE] = PHY_REG(RK3399_GRF_SOC_CON22, 4, 0),
+ [GRF_DPHY_TX0_FORCETXSTOPMODE] = PHY_REG(RK3399_GRF_SOC_CON22, 4, 4),
+ [GRF_DPHY_TX0_TURNDISABLE] = PHY_REG(RK3399_GRF_SOC_CON22, 4, 8),
+ [GRF_DPHY_TX0_TURNREQUEST] = PHY_REG(RK3399_GRF_SOC_CON22, 4, 12),
+ [GRF_DPHY_TX1RX1_ENABLE] = PHY_REG(RK3399_GRF_SOC_CON23, 4, 0),
+ [GRF_DPHY_TX1RX1_FORCERXMODE] = PHY_REG(RK3399_GRF_SOC_CON23, 4, 4),
+ [GRF_DPHY_TX1RX1_FORCETXSTOPMODE] = PHY_REG(RK3399_GRF_SOC_CON23, 4, 8),
+ [GRF_DPHY_TX1RX1_TURNDISABLE] = PHY_REG(RK3399_GRF_SOC_CON23, 4, 12),
+ [GRF_DPHY_TX1RX1_TURNREQUEST] = PHY_REG(RK3399_GRF_SOC_CON24, 4, 0),
+ [GRF_DPHY_RX1_SRC_SEL] = PHY_REG(RK3399_GRF_SOC_CON24, 1, 4),
+ [GRF_DPHY_TX1RX1_BASEDIR] = PHY_REG(RK3399_GRF_SOC_CON24, 1, 5),
+ [GRF_DPHY_TX1RX1_ENABLECLK] = PHY_REG(RK3399_GRF_SOC_CON24, 1, 6),
+ [GRF_DPHY_TX1RX1_MASTERSLAVEZ] = PHY_REG(RK3399_GRF_SOC_CON24, 1, 7),
+ [GRF_DPHY_RX0_TESTDIN] = PHY_REG(RK3399_GRF_SOC_CON25, 8, 0),
+ [GRF_DPHY_RX0_TESTEN] = PHY_REG(RK3399_GRF_SOC_CON25, 1, 8),
+ [GRF_DPHY_RX0_TESTCLK] = PHY_REG(RK3399_GRF_SOC_CON25, 1, 9),
+ [GRF_DPHY_RX0_TESTCLR] = PHY_REG(RK3399_GRF_SOC_CON25, 1, 10),
+ [GRF_DPHY_RX0_TESTDOUT] = PHY_REG(RK3399_GRF_SOC_STATUS1, 8, 0),
+};
+
+static const struct dphy_reg rk3288_grf_dphy_regs[] = {
+ [GRF_CON_DISABLE_ISP] = PHY_REG(RK3288_GRF_SOC_CON6, 1, 0),
+ [GRF_CON_ISP_DPHY_SEL] = PHY_REG(RK3288_GRF_SOC_CON6, 1, 1),
+ [GRF_DSI_CSI_TESTBUS_SEL] = PHY_REG(RK3288_GRF_SOC_CON6, 1, 14),
+ [GRF_DPHY_TX0_TURNDISABLE] = PHY_REG(RK3288_GRF_SOC_CON8, 4, 0),
+ [GRF_DPHY_TX0_FORCERXMODE] = PHY_REG(RK3288_GRF_SOC_CON8, 4, 4),
+ [GRF_DPHY_TX0_FORCETXSTOPMODE] = PHY_REG(RK3288_GRF_SOC_CON8, 4, 8),
+ [GRF_DPHY_TX1RX1_TURNDISABLE] = PHY_REG(RK3288_GRF_SOC_CON9, 4, 0),
+ [GRF_DPHY_TX1RX1_FORCERXMODE] = PHY_REG(RK3288_GRF_SOC_CON9, 4, 4),
+ [GRF_DPHY_TX1RX1_FORCETXSTOPMODE] = PHY_REG(RK3288_GRF_SOC_CON9, 4, 8),
+ [GRF_DPHY_TX1RX1_ENABLE] = PHY_REG(RK3288_GRF_SOC_CON9, 4, 12),
+ [GRF_DPHY_RX0_TURNDISABLE] = PHY_REG(RK3288_GRF_SOC_CON10, 4, 0),
+ [GRF_DPHY_RX0_FORCERXMODE] = PHY_REG(RK3288_GRF_SOC_CON10, 4, 4),
+ [GRF_DPHY_RX0_FORCETXSTOPMODE] = PHY_REG(RK3288_GRF_SOC_CON10, 4, 8),
+ [GRF_DPHY_RX0_ENABLE] = PHY_REG(RK3288_GRF_SOC_CON10, 4, 12),
+ [GRF_DPHY_RX0_TESTCLR] = PHY_REG(RK3288_GRF_SOC_CON14, 1, 0),
+ [GRF_DPHY_RX0_TESTCLK] = PHY_REG(RK3288_GRF_SOC_CON14, 1, 1),
+ [GRF_DPHY_RX0_TESTEN] = PHY_REG(RK3288_GRF_SOC_CON14, 1, 2),
+ [GRF_DPHY_RX0_TESTDIN] = PHY_REG(RK3288_GRF_SOC_CON14, 8, 3),
+ [GRF_DPHY_TX1RX1_ENABLECLK] = PHY_REG(RK3288_GRF_SOC_CON14, 1, 12),
+ [GRF_DPHY_RX1_SRC_SEL] = PHY_REG(RK3288_GRF_SOC_CON14, 1, 13),
+ [GRF_DPHY_TX1RX1_MASTERSLAVEZ] = PHY_REG(RK3288_GRF_SOC_CON14, 1, 14),
+ [GRF_DPHY_TX1RX1_BASEDIR] = PHY_REG(RK3288_GRF_SOC_CON14, 1, 15),
+ [GRF_DPHY_RX0_TURNREQUEST] = PHY_REG(RK3288_GRF_SOC_CON15, 4, 0),
+ [GRF_DPHY_TX1RX1_TURNREQUEST] = PHY_REG(RK3288_GRF_SOC_CON15, 4, 4),
+ [GRF_DPHY_TX0_TURNREQUEST] = PHY_REG(RK3288_GRF_SOC_CON15, 3, 8),
+ [GRF_DVP_V18SEL] = PHY_REG(RK3288_GRF_IO_VSEL, 1, 1),
+ [GRF_DPHY_RX0_TESTDOUT] = PHY_REG(RK3288_GRF_SOC_STATUS21, 8, 0),
+};
+
+struct hsfreq_range {
+ u32 range_h;
+ u8 cfg_bit;
+};
+
+struct dphy_drv_data {
+ const char * const *clks;
+ int num_clks;
+ const struct hsfreq_range *hsfreq_ranges;
+ int num_hsfreq_ranges;
+ const struct dphy_reg *regs;
+};
+
+struct sensor_async_subdev {
+ struct v4l2_async_subdev asd;
+ struct v4l2_mbus_config mbus;
+ int lanes;
+};
+
+#define MAX_DPHY_CLK 8
+#define MAX_DPHY_SENSORS 2
+
+struct mipidphy_sensor {
+ struct v4l2_subdev *sd;
+ struct v4l2_mbus_config mbus;
+ int lanes;
+};
+
+struct mipidphy_priv {
+ struct device *dev;
+ struct regmap *regmap_grf;
+ const struct dphy_reg *grf_regs;
+ struct clk *clks[MAX_DPHY_CLK];
+ const struct dphy_drv_data *drv_data;
+ u64 data_rate_mbps;
+ struct v4l2_async_notifier notifier;
+ struct v4l2_subdev sd;
+ struct media_pad pads[MIPI_DPHY_SY_PADS_NUM];
+ struct mipidphy_sensor sensors[MAX_DPHY_SENSORS];
+ int num_sensors;
+ bool is_streaming;
+};
+
+static inline struct mipidphy_priv *to_dphy_priv(struct v4l2_subdev *subdev)
+{
+ return container_of(subdev, struct mipidphy_priv, sd);
+}
+
+static inline void write_reg(struct mipidphy_priv *priv, int index, u8 value)
+{
+ const struct dphy_reg *reg = &priv->grf_regs[index];
+ unsigned int val = HIWORD_UPDATE(value, reg->mask, reg->shift);
+
+ WARN_ON(!reg->offset);
+ regmap_write(priv->regmap_grf, reg->offset, val);
+}
+
+static void mipidphy_wr_reg(struct mipidphy_priv *priv,
+ u8 test_code, u8 test_data)
+{
+ /*
+ * With the falling edge on TESTCLK, the TESTDIN[7:0] signal content
+ * is latched internally as the current test code. Test data is
+ * programmed internally by rising edge on TESTCLK.
+ */
+ write_reg(priv, GRF_DPHY_RX0_TESTCLK, 1);
+ write_reg(priv, GRF_DPHY_RX0_TESTDIN, test_code);
+ write_reg(priv, GRF_DPHY_RX0_TESTEN, 1);
+ write_reg(priv, GRF_DPHY_RX0_TESTCLK, 0);
+ write_reg(priv, GRF_DPHY_RX0_TESTEN, 0);
+ write_reg(priv, GRF_DPHY_RX0_TESTDIN, test_data);
+ write_reg(priv, GRF_DPHY_RX0_TESTCLK, 1);
+}
+
+static struct v4l2_subdev *get_remote_sensor(struct v4l2_subdev *sd)
+{
+ struct media_pad *local, *remote;
+ struct media_entity *sensor_me;
+
+ local = &sd->entity.pads[MIPI_DPHY_SY_PAD_SINK];
+ remote = media_entity_remote_pad(local);
+ if (!remote) {
+ v4l2_warn(sd, "No link between dphy and sensor\n");
+ return NULL;
+ }
+
+ sensor_me = media_entity_remote_pad(local)->entity;
+ return media_entity_to_v4l2_subdev(sensor_me);
+}
+
+static struct mipidphy_sensor *sd_to_sensor(struct mipidphy_priv *priv,
+ struct v4l2_subdev *sd)
+{
+ int i;
+
+ for (i = 0; i < priv->num_sensors; ++i)
+ if (priv->sensors[i].sd == sd)
+ return &priv->sensors[i];
+
+ return NULL;
+}
+
+static int mipidphy_get_sensor_data_rate(struct v4l2_subdev *sd)
+{
+ struct mipidphy_priv *priv = to_dphy_priv(sd);
+ struct v4l2_subdev *sensor_sd = get_remote_sensor(sd);
+ struct v4l2_ctrl *link_freq;
+ struct v4l2_querymenu qm = { .id = V4L2_CID_LINK_FREQ, };
+ int ret;
+
+ link_freq = v4l2_ctrl_find(sensor_sd->ctrl_handler, V4L2_CID_LINK_FREQ);
+ if (!link_freq) {
+ v4l2_warn(sd, "No pixel rate control in subdev\n");
+ return -EPIPE;
+ }
+
+ qm.index = v4l2_ctrl_g_ctrl(link_freq);
+ ret = v4l2_querymenu(sensor_sd->ctrl_handler, &qm);
+ if (ret < 0) {
+ v4l2_err(sd, "Failed to get menu item\n");
+ return ret;
+ }
+
+ if (!qm.value) {
+ v4l2_err(sd, "Invalid link_freq\n");
+ return -EINVAL;
+ }
+ priv->data_rate_mbps = qm.value * 2;
+ do_div(priv->data_rate_mbps, 1000 * 1000);
+
+ return 0;
+}
+
+static int mipidphy_s_stream_start(struct v4l2_subdev *sd)
+{
+ struct mipidphy_priv *priv = to_dphy_priv(sd);
+ const struct dphy_drv_data *drv_data = priv->drv_data;
+ const struct hsfreq_range *hsfreq_ranges = drv_data->hsfreq_ranges;
+ int num_hsfreq_ranges = drv_data->num_hsfreq_ranges;
+ struct v4l2_subdev *sensor_sd = get_remote_sensor(sd);
+ struct mipidphy_sensor *sensor = sd_to_sensor(priv, sensor_sd);
+ int i, ret, hsfreq = 0;
+
+ if (priv->is_streaming)
+ return 0;
+
+ ret = mipidphy_get_sensor_data_rate(sd);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; i < num_hsfreq_ranges; i++) {
+ if (hsfreq_ranges[i].range_h >= priv->data_rate_mbps) {
+ hsfreq = hsfreq_ranges[i].cfg_bit;
+ break;
+ }
+ }
+
+ write_reg(priv, GRF_DPHY_RX0_FORCERXMODE, 0);
+ write_reg(priv, GRF_DPHY_RX0_FORCETXSTOPMODE, 0);
+ /* Disable lan turn around, which is ignored in receive mode */
+ write_reg(priv, GRF_DPHY_RX0_TURNREQUEST, 0);
+ write_reg(priv, GRF_DPHY_RX0_TURNDISABLE, 0xf);
+
+ write_reg(priv, GRF_DPHY_RX0_ENABLE, GENMASK(sensor->lanes - 1, 0));
+
+ /* dphy start */
+ write_reg(priv, GRF_DPHY_RX0_TESTCLK, 1);
+ write_reg(priv, GRF_DPHY_RX0_TESTCLR, 1);
+ usleep_range(100, 150);
+ write_reg(priv, GRF_DPHY_RX0_TESTCLR, 0);
+ usleep_range(100, 150);
+
+ /* set clock lane */
+ /* HS hsfreq_range & lane 0 settle bypass */
+ mipidphy_wr_reg(priv, CLOCK_LANE_HS_RX_CONTROL, 0);
+ /* HS RX Control of lane0 */
+ mipidphy_wr_reg(priv, LANE0_HS_RX_CONTROL, hsfreq << 1);
+ /* HS RX Control of lane1 */
+ mipidphy_wr_reg(priv, LANE1_HS_RX_CONTROL, 0);
+ /* HS RX Control of lane2 */
+ mipidphy_wr_reg(priv, LANE2_HS_RX_CONTROL, 0);
+ /* HS RX Control of lane3 */
+ mipidphy_wr_reg(priv, LANE3_HS_RX_CONTROL, 0);
+ /* HS RX Data Lanes Settle State Time Control */
+ mipidphy_wr_reg(priv, HS_RX_DATA_LANES_THS_SETTLE__CONTROL, 0x04);
+
+ /* Normal operation */
+ mipidphy_wr_reg(priv, 0x0, 0);
+
+ priv->is_streaming = true;
+
+ return 0;
+}
+
+static int mipidphy_s_stream_stop(struct v4l2_subdev *sd)
+{
+ struct mipidphy_priv *priv = to_dphy_priv(sd);
+
+ if (!priv->is_streaming)
+ return 0;
+
+ priv->is_streaming = false;
+
+ return 0;
+}
+
+static int mipidphy_s_stream(struct v4l2_subdev *sd, int on)
+{
+ if (on)
+ return mipidphy_s_stream_start(sd);
+ else
+ return mipidphy_s_stream_stop(sd);
+}
+
+static int mipidphy_g_mbus_config(struct v4l2_subdev *sd,
+ struct v4l2_mbus_config *config)
+{
+ struct mipidphy_priv *priv = to_dphy_priv(sd);
+ struct v4l2_subdev *sensor_sd = get_remote_sensor(sd);
+ struct mipidphy_sensor *sensor = sd_to_sensor(priv, sensor_sd);
+
+ *config = sensor->mbus;
+
+ return 0;
+}
+
+static int mipidphy_s_power(struct v4l2_subdev *sd, int on)
+{
+ struct mipidphy_priv *priv = to_dphy_priv(sd);
+
+ if (on)
+ return pm_runtime_get_sync(priv->dev);
+ else
+ return pm_runtime_put(priv->dev);
+}
+
+static int mipidphy_runtime_suspend(struct device *dev)
+{
+ struct media_entity *me = dev_get_drvdata(dev);
+ struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(me);
+ struct mipidphy_priv *priv = to_dphy_priv(sd);
+ int i, num_clks;
+
+ num_clks = priv->drv_data->num_clks;
+ for (i = num_clks - 1; i >= 0; i--)
+ clk_disable_unprepare(priv->clks[i]);
+
+ return 0;
+}
+
+static int mipidphy_runtime_resume(struct device *dev)
+{
+ struct media_entity *me = dev_get_drvdata(dev);
+ struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(me);
+ struct mipidphy_priv *priv = to_dphy_priv(sd);
+ int i, num_clks, ret;
+
+ num_clks = priv->drv_data->num_clks;
+ for (i = 0; i < num_clks; i++) {
+ ret = clk_prepare_enable(priv->clks[i]);
+ if (ret < 0)
+ goto err;
+ }
+
+ return 0;
+err:
+ while (--i >= 0)
+ clk_disable_unprepare(priv->clks[i]);
+ return ret;
+}
+
+/* dphy accepts all fmt/size from sensor */
+static int mipidphy_get_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct v4l2_subdev *sensor = get_remote_sensor(sd);
+
+ /*
+ * Do not allow format changes and just relay whatever
+ * set currently in the sensor.
+ */
+ return v4l2_subdev_call(sensor, pad, get_fmt, NULL, fmt);
+}
+
+static const struct v4l2_subdev_pad_ops mipidphy_subdev_pad_ops = {
+ .set_fmt = mipidphy_get_set_fmt,
+ .get_fmt = mipidphy_get_set_fmt,
+};
+
+static const struct v4l2_subdev_core_ops mipidphy_core_ops = {
+ .s_power = mipidphy_s_power,
+};
+
+static const struct v4l2_subdev_video_ops mipidphy_video_ops = {
+ .g_mbus_config = mipidphy_g_mbus_config,
+ .s_stream = mipidphy_s_stream,
+};
+
+static const struct v4l2_subdev_ops mipidphy_subdev_ops = {
+ .core = &mipidphy_core_ops,
+ .video = &mipidphy_video_ops,
+ .pad = &mipidphy_subdev_pad_ops,
+};
+
+/* These tables must be sorted by .range_h ascending. */
+static const struct hsfreq_range rk3288_mipidphy_hsfreq_ranges[] = {
+ { 89, 0x00}, { 99, 0x10}, { 109, 0x20}, { 129, 0x01},
+ { 139, 0x11}, { 149, 0x21}, { 169, 0x02}, { 179, 0x12},
+ { 199, 0x22}, { 219, 0x03}, { 239, 0x13}, { 249, 0x23},
+ { 269, 0x04}, { 299, 0x14}, { 329, 0x05}, { 359, 0x15},
+ { 399, 0x25}, { 449, 0x06}, { 499, 0x16}, { 549, 0x07},
+ { 599, 0x17}, { 649, 0x08}, { 699, 0x18}, { 749, 0x09},
+ { 799, 0x19}, { 849, 0x29}, { 899, 0x39}, { 949, 0x0a},
+ { 999, 0x1a}
+};
+
+static const struct hsfreq_range rk3399_mipidphy_hsfreq_ranges[] = {
+ { 89, 0x00}, { 99, 0x10}, { 109, 0x20}, { 129, 0x01},
+ { 139, 0x11}, { 149, 0x21}, { 169, 0x02}, { 179, 0x12},
+ { 199, 0x22}, { 219, 0x03}, { 239, 0x13}, { 249, 0x23},
+ { 269, 0x04}, { 299, 0x14}, { 329, 0x05}, { 359, 0x15},
+ { 399, 0x25}, { 449, 0x06}, { 499, 0x16}, { 549, 0x07},
+ { 599, 0x17}, { 649, 0x08}, { 699, 0x18}, { 749, 0x09},
+ { 799, 0x19}, { 849, 0x29}, { 899, 0x39}, { 949, 0x0a},
+ { 999, 0x1a}, {1049, 0x2a}, {1099, 0x3a}, {1149, 0x0b},
+ {1199, 0x1b}, {1249, 0x2b}, {1299, 0x3b}, {1349, 0x0c},
+ {1399, 0x1c}, {1449, 0x2c}, {1500, 0x3c}
+};
+
+static const char * const rk3399_mipidphy_clks[] = {
+ "dphy-ref",
+ "dphy-cfg",
+ "grf",
+};
+
+static const char * const rk3288_mipidphy_clks[] = {
+ "dphy-ref",
+ "pclk",
+};
+
+static const struct dphy_drv_data rk3288_mipidphy_drv_data = {
+ .clks = rk3288_mipidphy_clks,
+ .num_clks = ARRAY_SIZE(rk3288_mipidphy_clks),
+ .hsfreq_ranges = rk3288_mipidphy_hsfreq_ranges,
+ .num_hsfreq_ranges = ARRAY_SIZE(rk3288_mipidphy_hsfreq_ranges),
+ .regs = rk3288_grf_dphy_regs,
+};
+
+static const struct dphy_drv_data rk3399_mipidphy_drv_data = {
+ .clks = rk3399_mipidphy_clks,
+ .num_clks = ARRAY_SIZE(rk3399_mipidphy_clks),
+ .hsfreq_ranges = rk3399_mipidphy_hsfreq_ranges,
+ .num_hsfreq_ranges = ARRAY_SIZE(rk3399_mipidphy_hsfreq_ranges),
+ .regs = rk3399_grf_dphy_regs,
+};
+
+static const struct of_device_id rockchip_mipidphy_match_id[] = {
+ {
+ .compatible = "rockchip,rk3399-mipi-dphy",
+ .data = &rk3399_mipidphy_drv_data,
+ },
+ {
+ .compatible = "rockchip,rk3288-mipi-dphy",
+ .data = &rk3288_mipidphy_drv_data,
+ },
+ {}
+};
+MODULE_DEVICE_TABLE(of, rockchip_mipidphy_match_id);
+
+/* The .bound() notifier callback when a match is found */
+static int
+rockchip_mipidphy_notifier_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *sd,
+ struct v4l2_async_subdev *asd)
+{
+ struct mipidphy_priv *priv = container_of(notifier,
+ struct mipidphy_priv,
+ notifier);
+ struct sensor_async_subdev *s_asd = container_of(asd,
+ struct sensor_async_subdev, asd);
+ struct mipidphy_sensor *sensor;
+ unsigned int pad, ret;
+
+ if (priv->num_sensors == ARRAY_SIZE(priv->sensors))
+ return -EBUSY;
+
+ sensor = &priv->sensors[priv->num_sensors++];
+ sensor->lanes = s_asd->lanes;
+ sensor->mbus = s_asd->mbus;
+ sensor->sd = sd;
+
+ for (pad = 0; pad < sensor->sd->entity.num_pads; pad++)
+ if (sensor->sd->entity.pads[pad].flags
+ & MEDIA_PAD_FL_SOURCE)
+ break;
+
+ if (pad == sensor->sd->entity.num_pads) {
+ dev_err(priv->dev,
+ "failed to find src pad for %s\n",
+ sensor->sd->name);
+
+ return -ENXIO;
+ }
+
+ ret = media_create_pad_link(
+ &sensor->sd->entity, pad,
+ &priv->sd.entity, MIPI_DPHY_SY_PAD_SINK,
+ priv->num_sensors != 1 ? 0 : MEDIA_LNK_FL_ENABLED);
+ if (ret) {
+ dev_err(priv->dev,
+ "failed to create link for %s\n",
+ sensor->sd->name);
+ return ret;
+ }
+
+ return 0;
+}
+
+/* The .unbind callback */
+static void
+rockchip_mipidphy_notifier_unbind(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *sd,
+ struct v4l2_async_subdev *asd)
+{
+ struct mipidphy_priv *priv = container_of(notifier,
+ struct mipidphy_priv,
+ notifier);
+ struct mipidphy_sensor *sensor = sd_to_sensor(priv, sd);
+
+ sensor->sd = NULL;
+}
+
+static const struct
+v4l2_async_notifier_operations rockchip_mipidphy_async_ops = {
+ .bound = rockchip_mipidphy_notifier_bound,
+ .unbind = rockchip_mipidphy_notifier_unbind,
+};
+
+static int rockchip_mipidphy_fwnode_parse(struct device *dev,
+ struct v4l2_fwnode_endpoint *vep,
+ struct v4l2_async_subdev *asd)
+{
+ struct sensor_async_subdev *s_asd =
+ container_of(asd, struct sensor_async_subdev, asd);
+ struct v4l2_mbus_config *config = &s_asd->mbus;
+
+ if (vep->bus_type != V4L2_MBUS_CSI2) {
+ dev_err(dev, "Only CSI2 bus type is currently supported\n");
+ return -EINVAL;
+ }
+
+ if (vep->base.port != 0) {
+ dev_err(dev, "The PHY has only port 0\n");
+ return -EINVAL;
+ }
+
+ config->type = V4L2_MBUS_CSI2;
+ config->flags = vep->bus.mipi_csi2.flags;
+ s_asd->lanes = vep->bus.mipi_csi2.num_data_lanes;
+
+ switch (vep->bus.mipi_csi2.num_data_lanes) {
+ case 1:
+ config->flags |= V4L2_MBUS_CSI2_1_LANE;
+ break;
+ case 2:
+ config->flags |= V4L2_MBUS_CSI2_2_LANE;
+ break;
+ case 3:
+ config->flags |= V4L2_MBUS_CSI2_3_LANE;
+ break;
+ case 4:
+ config->flags |= V4L2_MBUS_CSI2_4_LANE;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int rockchip_mipidphy_media_init(struct mipidphy_priv *priv)
+{
+ int ret;
+
+ priv->pads[MIPI_DPHY_SY_PAD_SOURCE].flags =
+ MEDIA_PAD_FL_SOURCE | MEDIA_PAD_FL_MUST_CONNECT;
+ priv->pads[MIPI_DPHY_SY_PAD_SINK].flags =
+ MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_MUST_CONNECT;
+
+ ret = media_entity_pads_init(&priv->sd.entity,
+ MIPI_DPHY_SY_PADS_NUM, priv->pads);
+ if (ret < 0)
+ return ret;
+
+ ret = v4l2_async_notifier_parse_fwnode_endpoints_by_port(
+ priv->dev, &priv->notifier,
+ sizeof(struct sensor_async_subdev), 0,
+ rockchip_mipidphy_fwnode_parse);
+ if (ret < 0)
+ return ret;
+
+ if (!priv->notifier.num_subdevs)
+ return -ENODEV; /* no endpoint */
+
+ priv->sd.subdev_notifier = &priv->notifier;
+ priv->notifier.ops = &rockchip_mipidphy_async_ops;
+ ret = v4l2_async_subdev_notifier_register(&priv->sd, &priv->notifier);
+ if (ret) {
+ dev_err(priv->dev,
+ "failed to register async notifier : %d\n", ret);
+ v4l2_async_notifier_cleanup(&priv->notifier);
+ return ret;
+ }
+
+ return v4l2_async_register_subdev(&priv->sd);
+}
+
+static int rockchip_mipidphy_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct v4l2_subdev *sd;
+ struct mipidphy_priv *priv;
+ struct regmap *grf;
+ const struct of_device_id *of_id;
+ const struct dphy_drv_data *drv_data;
+ int i, ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ priv->dev = dev;
+
+ of_id = of_match_device(rockchip_mipidphy_match_id, dev);
+ if (!of_id)
+ return -EINVAL;
+
+ grf = syscon_node_to_regmap(dev->parent->of_node);
+ if (IS_ERR(grf)) {
+ dev_err(dev, "Can't find GRF syscon\n");
+ return -ENODEV;
+ }
+ priv->regmap_grf = grf;
+
+ drv_data = of_id->data;
+ for (i = 0; i < drv_data->num_clks; i++) {
+ priv->clks[i] = devm_clk_get(dev, drv_data->clks[i]);
+
+ if (IS_ERR(priv->clks[i])) {
+ dev_err(dev, "Failed to get %s\n", drv_data->clks[i]);
+ return PTR_ERR(priv->clks[i]);
+ }
+ }
+
+ priv->grf_regs = drv_data->regs;
+ priv->drv_data = drv_data;
+
+ sd = &priv->sd;
+ v4l2_subdev_init(sd, &mipidphy_subdev_ops);
+ sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ snprintf(sd->name, sizeof(sd->name), "rockchip-sy-mipi-dphy");
+ sd->dev = dev;
+
+ platform_set_drvdata(pdev, &sd->entity);
+
+ ret = rockchip_mipidphy_media_init(priv);
+ if (ret < 0)
+ return ret;
+
+ pm_runtime_enable(&pdev->dev);
+
+ return 0;
+}
+
+static int rockchip_mipidphy_remove(struct platform_device *pdev)
+{
+ struct media_entity *me = platform_get_drvdata(pdev);
+ struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(me);
+
+ media_entity_cleanup(&sd->entity);
+
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static const struct dev_pm_ops rockchip_mipidphy_pm_ops = {
+ SET_RUNTIME_PM_OPS(mipidphy_runtime_suspend,
+ mipidphy_runtime_resume, NULL)
+};
+
+static struct platform_driver rockchip_isp_mipidphy_driver = {
+ .probe = rockchip_mipidphy_probe,
+ .remove = rockchip_mipidphy_remove,
+ .driver = {
+ .name = "rockchip-sy-mipi-dphy",
+ .pm = &rockchip_mipidphy_pm_ops,
+ .of_match_table = rockchip_mipidphy_match_id,
+ },
+};
+
+module_platform_driver(rockchip_isp_mipidphy_driver);
+MODULE_AUTHOR("Rockchip Camera/ISP team");
+MODULE_DESCRIPTION("Rockchip MIPI DPHY driver");
+MODULE_LICENSE("Dual BSD/GPL");
--
1.9.1
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  Last update: 2017-12-29 09:02    [W:0.247 / U:11.468 seconds]
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