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path: root/drivers/media/platform/ti-vpe/cal-camerarx.c
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Diffstat (limited to 'drivers/media/platform/ti-vpe/cal-camerarx.c')
-rw-r--r--drivers/media/platform/ti-vpe/cal-camerarx.c649
1 files changed, 649 insertions, 0 deletions
diff --git a/drivers/media/platform/ti-vpe/cal-camerarx.c b/drivers/media/platform/ti-vpe/cal-camerarx.c
new file mode 100644
index 000000000000..806cbf175d39
--- /dev/null
+++ b/drivers/media/platform/ti-vpe/cal-camerarx.c
@@ -0,0 +1,649 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * TI Camera Access Layer (CAL) - CAMERARX
+ *
+ * Copyright (c) 2015-2020 Texas Instruments Inc.
+ *
+ * Authors:
+ * Benoit Parrot <bparrot@ti.com>
+ * Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+#include "cal.h"
+#include "cal_regs.h"
+
+/* ------------------------------------------------------------------
+ * I/O Register Accessors
+ * ------------------------------------------------------------------
+ */
+
+static inline u32 camerarx_read(struct cal_camerarx *phy, u32 offset)
+{
+ return ioread32(phy->base + offset);
+}
+
+static inline void camerarx_write(struct cal_camerarx *phy, u32 offset, u32 val)
+{
+ iowrite32(val, phy->base + offset);
+}
+
+/* ------------------------------------------------------------------
+ * CAMERARX Management
+ * ------------------------------------------------------------------
+ */
+
+static s64 cal_camerarx_get_external_rate(struct cal_camerarx *phy)
+{
+ struct v4l2_ctrl *ctrl;
+ s64 rate;
+
+ ctrl = v4l2_ctrl_find(phy->sensor->ctrl_handler, V4L2_CID_PIXEL_RATE);
+ if (!ctrl) {
+ phy_err(phy, "no pixel rate control in subdev: %s\n",
+ phy->sensor->name);
+ return -EPIPE;
+ }
+
+ rate = v4l2_ctrl_g_ctrl_int64(ctrl);
+ phy_dbg(3, phy, "sensor Pixel Rate: %llu\n", rate);
+
+ return rate;
+}
+
+static void cal_camerarx_lane_config(struct cal_camerarx *phy)
+{
+ u32 val = cal_read(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance));
+ u32 lane_mask = CAL_CSI2_COMPLEXIO_CFG_CLOCK_POSITION_MASK;
+ u32 polarity_mask = CAL_CSI2_COMPLEXIO_CFG_CLOCK_POL_MASK;
+ struct v4l2_fwnode_bus_mipi_csi2 *mipi_csi2 =
+ &phy->endpoint.bus.mipi_csi2;
+ int lane;
+
+ cal_set_field(&val, mipi_csi2->clock_lane + 1, lane_mask);
+ cal_set_field(&val, mipi_csi2->lane_polarities[0], polarity_mask);
+ for (lane = 0; lane < mipi_csi2->num_data_lanes; lane++) {
+ /*
+ * Every lane are one nibble apart starting with the
+ * clock followed by the data lanes so shift masks by 4.
+ */
+ lane_mask <<= 4;
+ polarity_mask <<= 4;
+ cal_set_field(&val, mipi_csi2->data_lanes[lane] + 1, lane_mask);
+ cal_set_field(&val, mipi_csi2->lane_polarities[lane + 1],
+ polarity_mask);
+ }
+
+ cal_write(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance), val);
+ phy_dbg(3, phy, "CAL_CSI2_COMPLEXIO_CFG(%d) = 0x%08x\n",
+ phy->instance, val);
+}
+
+static void cal_camerarx_enable(struct cal_camerarx *phy)
+{
+ u32 num_lanes = phy->cal->data->camerarx[phy->instance].num_lanes;
+
+ regmap_field_write(phy->fields[F_CAMMODE], 0);
+ /* Always enable all lanes at the phy control level */
+ regmap_field_write(phy->fields[F_LANEENABLE], (1 << num_lanes) - 1);
+ /* F_CSI_MODE is not present on every architecture */
+ if (phy->fields[F_CSI_MODE])
+ regmap_field_write(phy->fields[F_CSI_MODE], 1);
+ regmap_field_write(phy->fields[F_CTRLCLKEN], 1);
+}
+
+void cal_camerarx_disable(struct cal_camerarx *phy)
+{
+ regmap_field_write(phy->fields[F_CTRLCLKEN], 0);
+}
+
+/*
+ * TCLK values are OK at their reset values
+ */
+#define TCLK_TERM 0
+#define TCLK_MISS 1
+#define TCLK_SETTLE 14
+
+static void cal_camerarx_config(struct cal_camerarx *phy, s64 external_rate,
+ const struct cal_fmt *fmt)
+{
+ unsigned int reg0, reg1;
+ unsigned int ths_term, ths_settle;
+ unsigned int csi2_ddrclk_khz;
+ struct v4l2_fwnode_bus_mipi_csi2 *mipi_csi2 =
+ &phy->endpoint.bus.mipi_csi2;
+ u32 num_lanes = mipi_csi2->num_data_lanes;
+
+ /* DPHY timing configuration */
+
+ /*
+ * CSI-2 is DDR and we only count used lanes.
+ *
+ * csi2_ddrclk_khz = external_rate / 1000
+ * / (2 * num_lanes) * fmt->bpp;
+ */
+ csi2_ddrclk_khz = div_s64(external_rate * fmt->bpp,
+ 2 * num_lanes * 1000);
+
+ phy_dbg(1, phy, "csi2_ddrclk_khz: %d\n", csi2_ddrclk_khz);
+
+ /* THS_TERM: Programmed value = floor(20 ns/DDRClk period) */
+ ths_term = 20 * csi2_ddrclk_khz / 1000000;
+ phy_dbg(1, phy, "ths_term: %d (0x%02x)\n", ths_term, ths_term);
+
+ /* THS_SETTLE: Programmed value = floor(105 ns/DDRClk period) + 4 */
+ ths_settle = (105 * csi2_ddrclk_khz / 1000000) + 4;
+ phy_dbg(1, phy, "ths_settle: %d (0x%02x)\n", ths_settle, ths_settle);
+
+ reg0 = camerarx_read(phy, CAL_CSI2_PHY_REG0);
+ cal_set_field(&reg0, CAL_CSI2_PHY_REG0_HSCLOCKCONFIG_DISABLE,
+ CAL_CSI2_PHY_REG0_HSCLOCKCONFIG_MASK);
+ cal_set_field(&reg0, ths_term, CAL_CSI2_PHY_REG0_THS_TERM_MASK);
+ cal_set_field(&reg0, ths_settle, CAL_CSI2_PHY_REG0_THS_SETTLE_MASK);
+
+ phy_dbg(1, phy, "CSI2_%d_REG0 = 0x%08x\n", phy->instance, reg0);
+ camerarx_write(phy, CAL_CSI2_PHY_REG0, reg0);
+
+ reg1 = camerarx_read(phy, CAL_CSI2_PHY_REG1);
+ cal_set_field(&reg1, TCLK_TERM, CAL_CSI2_PHY_REG1_TCLK_TERM_MASK);
+ cal_set_field(&reg1, 0xb8, CAL_CSI2_PHY_REG1_DPHY_HS_SYNC_PATTERN_MASK);
+ cal_set_field(&reg1, TCLK_MISS,
+ CAL_CSI2_PHY_REG1_CTRLCLK_DIV_FACTOR_MASK);
+ cal_set_field(&reg1, TCLK_SETTLE, CAL_CSI2_PHY_REG1_TCLK_SETTLE_MASK);
+
+ phy_dbg(1, phy, "CSI2_%d_REG1 = 0x%08x\n", phy->instance, reg1);
+ camerarx_write(phy, CAL_CSI2_PHY_REG1, reg1);
+}
+
+static void cal_camerarx_power(struct cal_camerarx *phy, bool enable)
+{
+ u32 target_state;
+ unsigned int i;
+
+ target_state = enable ? CAL_CSI2_COMPLEXIO_CFG_PWR_CMD_STATE_ON :
+ CAL_CSI2_COMPLEXIO_CFG_PWR_CMD_STATE_OFF;
+
+ cal_write_field(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance),
+ target_state, CAL_CSI2_COMPLEXIO_CFG_PWR_CMD_MASK);
+
+ for (i = 0; i < 10; i++) {
+ u32 current_state;
+
+ current_state = cal_read_field(phy->cal,
+ CAL_CSI2_COMPLEXIO_CFG(phy->instance),
+ CAL_CSI2_COMPLEXIO_CFG_PWR_STATUS_MASK);
+
+ if (current_state == target_state)
+ break;
+
+ usleep_range(1000, 1100);
+ }
+
+ if (i == 10)
+ phy_err(phy, "Failed to power %s complexio\n",
+ enable ? "up" : "down");
+}
+
+static void cal_camerarx_wait_reset(struct cal_camerarx *phy)
+{
+ unsigned long timeout;
+
+ timeout = jiffies + msecs_to_jiffies(750);
+ while (time_before(jiffies, timeout)) {
+ if (cal_read_field(phy->cal,
+ CAL_CSI2_COMPLEXIO_CFG(phy->instance),
+ CAL_CSI2_COMPLEXIO_CFG_RESET_DONE_MASK) ==
+ CAL_CSI2_COMPLEXIO_CFG_RESET_DONE_RESETCOMPLETED)
+ break;
+ usleep_range(500, 5000);
+ }
+
+ if (cal_read_field(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance),
+ CAL_CSI2_COMPLEXIO_CFG_RESET_DONE_MASK) !=
+ CAL_CSI2_COMPLEXIO_CFG_RESET_DONE_RESETCOMPLETED)
+ phy_err(phy, "Timeout waiting for Complex IO reset done\n");
+}
+
+static void cal_camerarx_wait_stop_state(struct cal_camerarx *phy)
+{
+ unsigned long timeout;
+
+ timeout = jiffies + msecs_to_jiffies(750);
+ while (time_before(jiffies, timeout)) {
+ if (cal_read_field(phy->cal,
+ CAL_CSI2_TIMING(phy->instance),
+ CAL_CSI2_TIMING_FORCE_RX_MODE_IO1_MASK) == 0)
+ break;
+ usleep_range(500, 5000);
+ }
+
+ if (cal_read_field(phy->cal, CAL_CSI2_TIMING(phy->instance),
+ CAL_CSI2_TIMING_FORCE_RX_MODE_IO1_MASK) != 0)
+ phy_err(phy, "Timeout waiting for stop state\n");
+}
+
+int cal_camerarx_start(struct cal_camerarx *phy, const struct cal_fmt *fmt)
+{
+ s64 external_rate;
+ u32 sscounter;
+ u32 val;
+ int ret;
+
+ external_rate = cal_camerarx_get_external_rate(phy);
+ if (external_rate < 0)
+ return external_rate;
+
+ ret = v4l2_subdev_call(phy->sensor, core, s_power, 1);
+ if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) {
+ phy_err(phy, "power on failed in subdev\n");
+ return ret;
+ }
+
+ /*
+ * CSI-2 PHY Link Initialization Sequence, according to the DRA74xP /
+ * DRA75xP / DRA76xP / DRA77xP TRM. The DRA71x / DRA72x and the AM65x /
+ * DRA80xM TRMs have a a slightly simplified sequence.
+ */
+
+ /*
+ * 1. Configure all CSI-2 low level protocol registers to be ready to
+ * receive signals/data from the CSI-2 PHY.
+ *
+ * i.-v. Configure the lanes position and polarity.
+ */
+ cal_camerarx_lane_config(phy);
+
+ /*
+ * vi.-vii. Configure D-PHY mode, enable the required lanes and
+ * enable the CAMERARX clock.
+ */
+ cal_camerarx_enable(phy);
+
+ /*
+ * 2. CSI PHY and link initialization sequence.
+ *
+ * a. Deassert the CSI-2 PHY reset. Do not wait for reset completion
+ * at this point, as it requires the external sensor to send the
+ * CSI-2 HS clock.
+ */
+ cal_write_field(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance),
+ CAL_CSI2_COMPLEXIO_CFG_RESET_CTRL_OPERATIONAL,
+ CAL_CSI2_COMPLEXIO_CFG_RESET_CTRL_MASK);
+ phy_dbg(3, phy, "CAL_CSI2_COMPLEXIO_CFG(%d) = 0x%08x De-assert Complex IO Reset\n",
+ phy->instance,
+ cal_read(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance)));
+
+ /* Dummy read to allow SCP reset to complete. */
+ camerarx_read(phy, CAL_CSI2_PHY_REG0);
+
+ /* Program the PHY timing parameters. */
+ cal_camerarx_config(phy, external_rate, fmt);
+
+ /*
+ * b. Assert the FORCERXMODE signal.
+ *
+ * The stop-state-counter is based on fclk cycles, and we always use
+ * the x16 and x4 settings, so stop-state-timeout =
+ * fclk-cycle * 16 * 4 * counter.
+ *
+ * Stop-state-timeout must be more than 100us as per CSI-2 spec, so we
+ * calculate a timeout that's 100us (rounding up).
+ */
+ sscounter = DIV_ROUND_UP(clk_get_rate(phy->cal->fclk), 10000 * 16 * 4);
+
+ val = cal_read(phy->cal, CAL_CSI2_TIMING(phy->instance));
+ cal_set_field(&val, 1, CAL_CSI2_TIMING_STOP_STATE_X16_IO1_MASK);
+ cal_set_field(&val, 1, CAL_CSI2_TIMING_STOP_STATE_X4_IO1_MASK);
+ cal_set_field(&val, sscounter,
+ CAL_CSI2_TIMING_STOP_STATE_COUNTER_IO1_MASK);
+ cal_write(phy->cal, CAL_CSI2_TIMING(phy->instance), val);
+ phy_dbg(3, phy, "CAL_CSI2_TIMING(%d) = 0x%08x Stop States\n",
+ phy->instance,
+ cal_read(phy->cal, CAL_CSI2_TIMING(phy->instance)));
+
+ /* Assert the FORCERXMODE signal. */
+ cal_write_field(phy->cal, CAL_CSI2_TIMING(phy->instance),
+ 1, CAL_CSI2_TIMING_FORCE_RX_MODE_IO1_MASK);
+ phy_dbg(3, phy, "CAL_CSI2_TIMING(%d) = 0x%08x Force RXMODE\n",
+ phy->instance,
+ cal_read(phy->cal, CAL_CSI2_TIMING(phy->instance)));
+
+ /*
+ * c. Connect pull-down on CSI-2 PHY link (using pad control).
+ *
+ * This is not required on DRA71x, DRA72x, AM65x and DRA80xM. Not
+ * implemented.
+ */
+
+ /*
+ * d. Power up the CSI-2 PHY.
+ * e. Check whether the state status reaches the ON state.
+ */
+ cal_camerarx_power(phy, true);
+
+ /*
+ * Start the sensor to enable the CSI-2 HS clock. We can now wait for
+ * CSI-2 PHY reset to complete.
+ */
+ ret = v4l2_subdev_call(phy->sensor, video, s_stream, 1);
+ if (ret) {
+ v4l2_subdev_call(phy->sensor, core, s_power, 0);
+ phy_err(phy, "stream on failed in subdev\n");
+ return ret;
+ }
+
+ cal_camerarx_wait_reset(phy);
+
+ /* f. Wait for STOPSTATE=1 for all enabled lane modules. */
+ cal_camerarx_wait_stop_state(phy);
+
+ phy_dbg(1, phy, "CSI2_%u_REG1 = 0x%08x (bits 31-28 should be set)\n",
+ phy->instance, camerarx_read(phy, CAL_CSI2_PHY_REG1));
+
+ /*
+ * g. Disable pull-down on CSI-2 PHY link (using pad control).
+ *
+ * This is not required on DRA71x, DRA72x, AM65x and DRA80xM. Not
+ * implemented.
+ */
+
+ return 0;
+}
+
+void cal_camerarx_stop(struct cal_camerarx *phy)
+{
+ unsigned int i;
+ int ret;
+
+ cal_camerarx_power(phy, false);
+
+ /* Assert Complex IO Reset */
+ cal_write_field(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance),
+ CAL_CSI2_COMPLEXIO_CFG_RESET_CTRL,
+ CAL_CSI2_COMPLEXIO_CFG_RESET_CTRL_MASK);
+
+ /* Wait for power down completion */
+ for (i = 0; i < 10; i++) {
+ if (cal_read_field(phy->cal,
+ CAL_CSI2_COMPLEXIO_CFG(phy->instance),
+ CAL_CSI2_COMPLEXIO_CFG_RESET_DONE_MASK) ==
+ CAL_CSI2_COMPLEXIO_CFG_RESET_DONE_RESETONGOING)
+ break;
+ usleep_range(1000, 1100);
+ }
+ phy_dbg(3, phy, "CAL_CSI2_COMPLEXIO_CFG(%d) = 0x%08x Complex IO in Reset (%d) %s\n",
+ phy->instance,
+ cal_read(phy->cal, CAL_CSI2_COMPLEXIO_CFG(phy->instance)), i,
+ (i >= 10) ? "(timeout)" : "");
+
+ /* Disable the phy */
+ cal_camerarx_disable(phy);
+
+ if (v4l2_subdev_call(phy->sensor, video, s_stream, 0))
+ phy_err(phy, "stream off failed in subdev\n");
+
+ ret = v4l2_subdev_call(phy->sensor, core, s_power, 0);
+ if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
+ phy_err(phy, "power off failed in subdev\n");
+}
+
+/*
+ * Errata i913: CSI2 LDO Needs to be disabled when module is powered on
+ *
+ * Enabling CSI2 LDO shorts it to core supply. It is crucial the 2 CSI2
+ * LDOs on the device are disabled if CSI-2 module is powered on
+ * (0x4845 B304 | 0x4845 B384 [28:27] = 0x1) or in ULPS (0x4845 B304
+ * | 0x4845 B384 [28:27] = 0x2) mode. Common concerns include: high
+ * current draw on the module supply in active mode.
+ *
+ * Errata does not apply when CSI-2 module is powered off
+ * (0x4845 B304 | 0x4845 B384 [28:27] = 0x0).
+ *
+ * SW Workaround:
+ * Set the following register bits to disable the LDO,
+ * which is essentially CSI2 REG10 bit 6:
+ *
+ * Core 0: 0x4845 B828 = 0x0000 0040
+ * Core 1: 0x4845 B928 = 0x0000 0040
+ */
+void cal_camerarx_i913_errata(struct cal_camerarx *phy)
+{
+ u32 reg10 = camerarx_read(phy, CAL_CSI2_PHY_REG10);
+
+ cal_set_field(&reg10, 1, CAL_CSI2_PHY_REG10_I933_LDO_DISABLE_MASK);
+
+ phy_dbg(1, phy, "CSI2_%d_REG10 = 0x%08x\n", phy->instance, reg10);
+ camerarx_write(phy, CAL_CSI2_PHY_REG10, reg10);
+}
+
+/*
+ * Enable the expected IRQ sources
+ */
+void cal_camerarx_enable_irqs(struct cal_camerarx *phy)
+{
+ u32 val;
+
+ const u32 cio_err_mask =
+ CAL_CSI2_COMPLEXIO_IRQ_LANE_ERRORS_MASK |
+ CAL_CSI2_COMPLEXIO_IRQ_FIFO_OVR_MASK |
+ CAL_CSI2_COMPLEXIO_IRQ_SHORT_PACKET_MASK |
+ CAL_CSI2_COMPLEXIO_IRQ_ECC_NO_CORRECTION_MASK;
+
+ /* Enable CIO error irqs */
+ cal_write(phy->cal, CAL_HL_IRQENABLE_SET(0),
+ CAL_HL_IRQ_CIO_MASK(phy->instance));
+ cal_write(phy->cal, CAL_CSI2_COMPLEXIO_IRQENABLE(phy->instance),
+ cio_err_mask);
+
+ /* Always enable OCPO error */
+ cal_write(phy->cal, CAL_HL_IRQENABLE_SET(0), CAL_HL_IRQ_OCPO_ERR_MASK);
+
+ /* Enable IRQ_WDMA_END 0/1 */
+ val = 0;
+ cal_set_field(&val, 1, CAL_HL_IRQ_MASK(phy->instance));
+ cal_write(phy->cal, CAL_HL_IRQENABLE_SET(1), val);
+ /* Enable IRQ_WDMA_START 0/1 */
+ val = 0;
+ cal_set_field(&val, 1, CAL_HL_IRQ_MASK(phy->instance));
+ cal_write(phy->cal, CAL_HL_IRQENABLE_SET(2), val);
+ /* Todo: Add VC_IRQ and CSI2_COMPLEXIO_IRQ handling */
+ cal_write(phy->cal, CAL_CSI2_VC_IRQENABLE(0), 0xFF000000);
+}
+
+void cal_camerarx_disable_irqs(struct cal_camerarx *phy)
+{
+ u32 val;
+
+ /* Disable CIO error irqs */
+ cal_write(phy->cal, CAL_HL_IRQENABLE_CLR(0),
+ CAL_HL_IRQ_CIO_MASK(phy->instance));
+ cal_write(phy->cal, CAL_CSI2_COMPLEXIO_IRQENABLE(phy->instance), 0);
+
+ /* Disable IRQ_WDMA_END 0/1 */
+ val = 0;
+ cal_set_field(&val, 1, CAL_HL_IRQ_MASK(phy->instance));
+ cal_write(phy->cal, CAL_HL_IRQENABLE_CLR(1), val);
+ /* Disable IRQ_WDMA_START 0/1 */
+ val = 0;
+ cal_set_field(&val, 1, CAL_HL_IRQ_MASK(phy->instance));
+ cal_write(phy->cal, CAL_HL_IRQENABLE_CLR(2), val);
+ /* Todo: Add VC_IRQ and CSI2_COMPLEXIO_IRQ handling */
+ cal_write(phy->cal, CAL_CSI2_VC_IRQENABLE(0), 0);
+}
+
+void cal_camerarx_ppi_enable(struct cal_camerarx *phy)
+{
+ cal_write(phy->cal, CAL_CSI2_PPI_CTRL(phy->instance), BIT(3));
+ cal_write_field(phy->cal, CAL_CSI2_PPI_CTRL(phy->instance),
+ 1, CAL_CSI2_PPI_CTRL_IF_EN_MASK);
+}
+
+void cal_camerarx_ppi_disable(struct cal_camerarx *phy)
+{
+ cal_write_field(phy->cal, CAL_CSI2_PPI_CTRL(phy->instance),
+ 0, CAL_CSI2_PPI_CTRL_IF_EN_MASK);
+}
+
+static int cal_camerarx_regmap_init(struct cal_dev *cal,
+ struct cal_camerarx *phy)
+{
+ const struct cal_camerarx_data *phy_data;
+ unsigned int i;
+
+ if (!cal->data)
+ return -EINVAL;
+
+ phy_data = &cal->data->camerarx[phy->instance];
+
+ for (i = 0; i < F_MAX_FIELDS; i++) {
+ struct reg_field field = {
+ .reg = cal->syscon_camerrx_offset,
+ .lsb = phy_data->fields[i].lsb,
+ .msb = phy_data->fields[i].msb,
+ };
+
+ /*
+ * Here we update the reg offset with the
+ * value found in DT
+ */
+ phy->fields[i] = devm_regmap_field_alloc(cal->dev,
+ cal->syscon_camerrx,
+ field);
+ if (IS_ERR(phy->fields[i])) {
+ cal_err(cal, "Unable to allocate regmap fields\n");
+ return PTR_ERR(phy->fields[i]);
+ }
+ }
+
+ return 0;
+}
+
+static int cal_camerarx_parse_dt(struct cal_camerarx *phy)
+{
+ struct v4l2_fwnode_endpoint *endpoint = &phy->endpoint;
+ struct device_node *ep_node;
+ char data_lanes[V4L2_FWNODE_CSI2_MAX_DATA_LANES * 2];
+ unsigned int i;
+ int ret;
+
+ /*
+ * Find the endpoint node for the port corresponding to the PHY
+ * instance, and parse its CSI-2-related properties.
+ */
+ ep_node = of_graph_get_endpoint_by_regs(phy->cal->dev->of_node,
+ phy->instance, 0);
+ if (!ep_node) {
+ /*
+ * The endpoint is not mandatory, not all PHY instances need to
+ * be connected in DT.
+ */
+ phy_dbg(3, phy, "Port has no endpoint\n");
+ return 0;
+ }
+
+ endpoint->bus_type = V4L2_MBUS_CSI2_DPHY;
+ ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep_node), endpoint);
+ if (ret < 0) {
+ phy_err(phy, "Failed to parse endpoint\n");
+ goto done;
+ }
+
+ for (i = 0; i < endpoint->bus.mipi_csi2.num_data_lanes; i++) {
+ unsigned int lane = endpoint->bus.mipi_csi2.data_lanes[i];
+
+ if (lane > 4) {
+ phy_err(phy, "Invalid position %u for data lane %u\n",
+ lane, i);
+ ret = -EINVAL;
+ goto done;
+ }
+
+ data_lanes[i*2] = '0' + lane;
+ data_lanes[i*2+1] = ' ';
+ }
+
+ data_lanes[i*2-1] = '\0';
+
+ phy_dbg(3, phy,
+ "CSI-2 bus: clock lane <%u>, data lanes <%s>, flags 0x%08x\n",
+ endpoint->bus.mipi_csi2.clock_lane, data_lanes,
+ endpoint->bus.mipi_csi2.flags);
+
+ /* Retrieve the connected device and store it for later use. */
+ phy->sensor_node = of_graph_get_remote_port_parent(ep_node);
+ if (!phy->sensor_node) {
+ phy_dbg(3, phy, "Can't get remote parent\n");
+ ret = -EINVAL;
+ goto done;
+ }
+
+ phy_dbg(1, phy, "Found connected device %pOFn\n", phy->sensor_node);
+
+done:
+ of_node_put(ep_node);
+ return ret;
+}
+
+struct cal_camerarx *cal_camerarx_create(struct cal_dev *cal,
+ unsigned int instance)
+{
+ struct platform_device *pdev = to_platform_device(cal->dev);
+ struct cal_camerarx *phy;
+ int ret;
+
+ phy = kzalloc(sizeof(*phy), GFP_KERNEL);
+ if (!phy)
+ return ERR_PTR(-ENOMEM);
+
+ phy->cal = cal;
+ phy->instance = instance;
+
+ phy->res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ (instance == 0) ?
+ "cal_rx_core0" :
+ "cal_rx_core1");
+ phy->base = devm_ioremap_resource(cal->dev, phy->res);
+ if (IS_ERR(phy->base)) {
+ cal_err(cal, "failed to ioremap\n");
+ ret = PTR_ERR(phy->base);
+ goto error;
+ }
+
+ cal_dbg(1, cal, "ioresource %s at %pa - %pa\n",
+ phy->res->name, &phy->res->start, &phy->res->end);
+
+ ret = cal_camerarx_regmap_init(cal, phy);
+ if (ret)
+ goto error;
+
+ ret = cal_camerarx_parse_dt(phy);
+ if (ret)
+ goto error;
+
+ return phy;
+
+error:
+ kfree(phy);
+ return ERR_PTR(ret);
+}
+
+void cal_camerarx_destroy(struct cal_camerarx *phy)
+{
+ if (!phy)
+ return;
+
+ of_node_put(phy->sensor_node);
+ kfree(phy);
+}