463 lines
12 KiB
C
463 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Author: Dan Scally <djrscally@gmail.com> */
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#include <linux/acpi.h>
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#include <linux/device.h>
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#include <linux/i2c.h>
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#include <linux/pci.h>
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#include <linux/property.h>
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#include <media/v4l2-fwnode.h>
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#include "cio2-bridge.h"
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/*
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* Extend this array with ACPI Hardware IDs of devices known to be working
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* plus the number of link-frequencies expected by their drivers, along with
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* the frequency values in hertz. This is somewhat opportunistic way of adding
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* support for this for now in the hopes of a better source for the information
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* (possibly some encoded value in the SSDB buffer that we're unaware of)
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* becoming apparent in the future.
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*
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* Do not add an entry for a sensor that is not actually supported.
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*/
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static const struct cio2_sensor_config cio2_supported_sensors[] = {
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/* Omnivision OV5693 */
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CIO2_SENSOR_CONFIG("INT33BE", 1, 419200000),
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/* Omnivision OV8865 */
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CIO2_SENSOR_CONFIG("INT347A", 1, 360000000),
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/* Omnivision OV7251 */
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CIO2_SENSOR_CONFIG("INT347E", 1, 319200000),
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/* Omnivision OV2680 */
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CIO2_SENSOR_CONFIG("OVTI2680", 0),
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};
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static const struct cio2_property_names prop_names = {
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.clock_frequency = "clock-frequency",
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.rotation = "rotation",
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.orientation = "orientation",
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.bus_type = "bus-type",
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.data_lanes = "data-lanes",
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.remote_endpoint = "remote-endpoint",
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.link_frequencies = "link-frequencies",
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};
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static const char * const cio2_vcm_types[] = {
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"ad5823",
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"dw9714",
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"ad5816",
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"dw9719",
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"dw9718",
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"dw9806b",
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"wv517s",
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"lc898122xa",
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"lc898212axb",
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};
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static int cio2_bridge_read_acpi_buffer(struct acpi_device *adev, char *id,
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void *data, u32 size)
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{
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object *obj;
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acpi_status status;
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int ret = 0;
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status = acpi_evaluate_object(adev->handle, id, NULL, &buffer);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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obj = buffer.pointer;
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if (!obj) {
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dev_err(&adev->dev, "Couldn't locate ACPI buffer\n");
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return -ENODEV;
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}
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if (obj->type != ACPI_TYPE_BUFFER) {
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dev_err(&adev->dev, "Not an ACPI buffer\n");
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ret = -ENODEV;
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goto out_free_buff;
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}
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if (obj->buffer.length > size) {
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dev_err(&adev->dev, "Given buffer is too small\n");
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ret = -EINVAL;
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goto out_free_buff;
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}
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memcpy(data, obj->buffer.pointer, obj->buffer.length);
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out_free_buff:
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kfree(buffer.pointer);
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return ret;
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}
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static u32 cio2_bridge_parse_rotation(struct cio2_sensor *sensor)
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{
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switch (sensor->ssdb.degree) {
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case CIO2_SENSOR_ROTATION_NORMAL:
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return 0;
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case CIO2_SENSOR_ROTATION_INVERTED:
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return 180;
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default:
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dev_warn(&sensor->adev->dev,
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"Unknown rotation %d. Assume 0 degree rotation\n",
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sensor->ssdb.degree);
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return 0;
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}
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}
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static enum v4l2_fwnode_orientation cio2_bridge_parse_orientation(struct cio2_sensor *sensor)
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{
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switch (sensor->pld->panel) {
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case ACPI_PLD_PANEL_FRONT:
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return V4L2_FWNODE_ORIENTATION_FRONT;
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case ACPI_PLD_PANEL_BACK:
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return V4L2_FWNODE_ORIENTATION_BACK;
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case ACPI_PLD_PANEL_TOP:
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case ACPI_PLD_PANEL_LEFT:
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case ACPI_PLD_PANEL_RIGHT:
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case ACPI_PLD_PANEL_UNKNOWN:
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return V4L2_FWNODE_ORIENTATION_EXTERNAL;
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default:
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dev_warn(&sensor->adev->dev, "Unknown _PLD panel value %d\n",
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sensor->pld->panel);
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return V4L2_FWNODE_ORIENTATION_EXTERNAL;
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}
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}
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static void cio2_bridge_create_fwnode_properties(
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struct cio2_sensor *sensor,
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struct cio2_bridge *bridge,
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const struct cio2_sensor_config *cfg)
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{
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u32 rotation;
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enum v4l2_fwnode_orientation orientation;
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rotation = cio2_bridge_parse_rotation(sensor);
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orientation = cio2_bridge_parse_orientation(sensor);
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sensor->prop_names = prop_names;
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sensor->local_ref[0] = SOFTWARE_NODE_REFERENCE(&sensor->swnodes[SWNODE_CIO2_ENDPOINT]);
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sensor->remote_ref[0] = SOFTWARE_NODE_REFERENCE(&sensor->swnodes[SWNODE_SENSOR_ENDPOINT]);
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sensor->dev_properties[0] = PROPERTY_ENTRY_U32(
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sensor->prop_names.clock_frequency,
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sensor->ssdb.mclkspeed);
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sensor->dev_properties[1] = PROPERTY_ENTRY_U32(
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sensor->prop_names.rotation,
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rotation);
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sensor->dev_properties[2] = PROPERTY_ENTRY_U32(
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sensor->prop_names.orientation,
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orientation);
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if (sensor->ssdb.vcmtype) {
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sensor->vcm_ref[0] =
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SOFTWARE_NODE_REFERENCE(&sensor->swnodes[SWNODE_VCM]);
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sensor->dev_properties[3] =
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PROPERTY_ENTRY_REF_ARRAY("lens-focus", sensor->vcm_ref);
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}
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sensor->ep_properties[0] = PROPERTY_ENTRY_U32(
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sensor->prop_names.bus_type,
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V4L2_FWNODE_BUS_TYPE_CSI2_DPHY);
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sensor->ep_properties[1] = PROPERTY_ENTRY_U32_ARRAY_LEN(
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sensor->prop_names.data_lanes,
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bridge->data_lanes,
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sensor->ssdb.lanes);
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sensor->ep_properties[2] = PROPERTY_ENTRY_REF_ARRAY(
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sensor->prop_names.remote_endpoint,
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sensor->local_ref);
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if (cfg->nr_link_freqs > 0)
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sensor->ep_properties[3] = PROPERTY_ENTRY_U64_ARRAY_LEN(
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sensor->prop_names.link_frequencies,
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cfg->link_freqs,
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cfg->nr_link_freqs);
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sensor->cio2_properties[0] = PROPERTY_ENTRY_U32_ARRAY_LEN(
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sensor->prop_names.data_lanes,
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bridge->data_lanes,
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sensor->ssdb.lanes);
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sensor->cio2_properties[1] = PROPERTY_ENTRY_REF_ARRAY(
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sensor->prop_names.remote_endpoint,
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sensor->remote_ref);
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}
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static void cio2_bridge_init_swnode_names(struct cio2_sensor *sensor)
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{
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snprintf(sensor->node_names.remote_port,
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sizeof(sensor->node_names.remote_port),
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SWNODE_GRAPH_PORT_NAME_FMT, sensor->ssdb.link);
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snprintf(sensor->node_names.port,
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sizeof(sensor->node_names.port),
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SWNODE_GRAPH_PORT_NAME_FMT, 0); /* Always port 0 */
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snprintf(sensor->node_names.endpoint,
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sizeof(sensor->node_names.endpoint),
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SWNODE_GRAPH_ENDPOINT_NAME_FMT, 0); /* And endpoint 0 */
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}
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static void cio2_bridge_create_connection_swnodes(struct cio2_bridge *bridge,
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struct cio2_sensor *sensor)
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{
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struct software_node *nodes = sensor->swnodes;
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cio2_bridge_init_swnode_names(sensor);
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nodes[SWNODE_SENSOR_HID] = NODE_SENSOR(sensor->name,
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sensor->dev_properties);
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nodes[SWNODE_SENSOR_PORT] = NODE_PORT(sensor->node_names.port,
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&nodes[SWNODE_SENSOR_HID]);
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nodes[SWNODE_SENSOR_ENDPOINT] = NODE_ENDPOINT(
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sensor->node_names.endpoint,
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&nodes[SWNODE_SENSOR_PORT],
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sensor->ep_properties);
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nodes[SWNODE_CIO2_PORT] = NODE_PORT(sensor->node_names.remote_port,
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&bridge->cio2_hid_node);
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nodes[SWNODE_CIO2_ENDPOINT] = NODE_ENDPOINT(
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sensor->node_names.endpoint,
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&nodes[SWNODE_CIO2_PORT],
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sensor->cio2_properties);
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if (sensor->ssdb.vcmtype)
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nodes[SWNODE_VCM] =
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NODE_VCM(cio2_vcm_types[sensor->ssdb.vcmtype - 1]);
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}
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static void cio2_bridge_instantiate_vcm_i2c_client(struct cio2_sensor *sensor)
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{
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struct i2c_board_info board_info = { };
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char name[16];
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if (!sensor->ssdb.vcmtype)
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return;
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snprintf(name, sizeof(name), "%s-VCM", acpi_dev_name(sensor->adev));
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board_info.dev_name = name;
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strscpy(board_info.type, cio2_vcm_types[sensor->ssdb.vcmtype - 1],
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ARRAY_SIZE(board_info.type));
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board_info.swnode = &sensor->swnodes[SWNODE_VCM];
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sensor->vcm_i2c_client =
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i2c_acpi_new_device_by_fwnode(acpi_fwnode_handle(sensor->adev),
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1, &board_info);
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if (IS_ERR(sensor->vcm_i2c_client)) {
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dev_warn(&sensor->adev->dev, "Error instantiation VCM i2c-client: %ld\n",
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PTR_ERR(sensor->vcm_i2c_client));
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sensor->vcm_i2c_client = NULL;
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}
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}
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static void cio2_bridge_unregister_sensors(struct cio2_bridge *bridge)
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{
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struct cio2_sensor *sensor;
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unsigned int i;
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for (i = 0; i < bridge->n_sensors; i++) {
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sensor = &bridge->sensors[i];
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software_node_unregister_nodes(sensor->swnodes);
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ACPI_FREE(sensor->pld);
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acpi_dev_put(sensor->adev);
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i2c_unregister_device(sensor->vcm_i2c_client);
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}
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}
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static int cio2_bridge_connect_sensor(const struct cio2_sensor_config *cfg,
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struct cio2_bridge *bridge,
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struct pci_dev *cio2)
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{
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struct fwnode_handle *fwnode;
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struct cio2_sensor *sensor;
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struct acpi_device *adev;
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acpi_status status;
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int ret;
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for_each_acpi_dev_match(adev, cfg->hid, NULL, -1) {
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if (!adev->status.enabled)
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continue;
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if (bridge->n_sensors >= CIO2_NUM_PORTS) {
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acpi_dev_put(adev);
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dev_err(&cio2->dev, "Exceeded available CIO2 ports\n");
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return -EINVAL;
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}
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sensor = &bridge->sensors[bridge->n_sensors];
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strscpy(sensor->name, cfg->hid, sizeof(sensor->name));
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ret = cio2_bridge_read_acpi_buffer(adev, "SSDB",
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&sensor->ssdb,
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sizeof(sensor->ssdb));
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if (ret)
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goto err_put_adev;
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if (sensor->ssdb.vcmtype > ARRAY_SIZE(cio2_vcm_types)) {
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dev_warn(&adev->dev, "Unknown VCM type %d\n",
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sensor->ssdb.vcmtype);
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sensor->ssdb.vcmtype = 0;
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}
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status = acpi_get_physical_device_location(adev->handle, &sensor->pld);
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if (ACPI_FAILURE(status)) {
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ret = -ENODEV;
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goto err_put_adev;
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}
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if (sensor->ssdb.lanes > CIO2_MAX_LANES) {
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dev_err(&adev->dev,
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"Number of lanes in SSDB is invalid\n");
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ret = -EINVAL;
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goto err_free_pld;
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}
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cio2_bridge_create_fwnode_properties(sensor, bridge, cfg);
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cio2_bridge_create_connection_swnodes(bridge, sensor);
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ret = software_node_register_nodes(sensor->swnodes);
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if (ret)
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goto err_free_pld;
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fwnode = software_node_fwnode(&sensor->swnodes[
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SWNODE_SENSOR_HID]);
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if (!fwnode) {
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ret = -ENODEV;
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goto err_free_swnodes;
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}
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sensor->adev = acpi_dev_get(adev);
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adev->fwnode.secondary = fwnode;
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cio2_bridge_instantiate_vcm_i2c_client(sensor);
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dev_info(&cio2->dev, "Found supported sensor %s\n",
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acpi_dev_name(adev));
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bridge->n_sensors++;
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}
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return 0;
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err_free_swnodes:
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software_node_unregister_nodes(sensor->swnodes);
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err_free_pld:
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ACPI_FREE(sensor->pld);
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err_put_adev:
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acpi_dev_put(adev);
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return ret;
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}
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static int cio2_bridge_connect_sensors(struct cio2_bridge *bridge,
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struct pci_dev *cio2)
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{
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unsigned int i;
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int ret;
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for (i = 0; i < ARRAY_SIZE(cio2_supported_sensors); i++) {
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const struct cio2_sensor_config *cfg =
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&cio2_supported_sensors[i];
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ret = cio2_bridge_connect_sensor(cfg, bridge, cio2);
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if (ret)
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goto err_unregister_sensors;
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}
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return 0;
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err_unregister_sensors:
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cio2_bridge_unregister_sensors(bridge);
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return ret;
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}
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/*
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* The VCM cannot be probed until the PMIC is completely setup. We cannot rely
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* on -EPROBE_DEFER for this, since the consumer<->supplier relations between
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* the VCM and regulators/clks are not described in ACPI, instead they are
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* passed as board-data to the PMIC drivers. Since -PROBE_DEFER does not work
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* for the clks/regulators the VCM i2c-clients must not be instantiated until
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* the PMIC is fully setup.
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*
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* The sensor/VCM ACPI device has an ACPI _DEP on the PMIC, check this using the
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* acpi_dev_ready_for_enumeration() helper, like the i2c-core-acpi code does
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* for the sensors.
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*/
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static int cio2_bridge_sensors_are_ready(void)
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{
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struct acpi_device *adev;
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bool ready = true;
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(cio2_supported_sensors); i++) {
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const struct cio2_sensor_config *cfg =
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&cio2_supported_sensors[i];
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for_each_acpi_dev_match(adev, cfg->hid, NULL, -1) {
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if (!adev->status.enabled)
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continue;
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if (!acpi_dev_ready_for_enumeration(adev))
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ready = false;
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}
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}
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return ready;
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}
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int cio2_bridge_init(struct pci_dev *cio2)
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{
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struct device *dev = &cio2->dev;
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struct fwnode_handle *fwnode;
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struct cio2_bridge *bridge;
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unsigned int i;
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int ret;
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if (!cio2_bridge_sensors_are_ready())
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return -EPROBE_DEFER;
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bridge = kzalloc(sizeof(*bridge), GFP_KERNEL);
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if (!bridge)
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return -ENOMEM;
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strscpy(bridge->cio2_node_name, CIO2_HID,
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sizeof(bridge->cio2_node_name));
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bridge->cio2_hid_node.name = bridge->cio2_node_name;
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ret = software_node_register(&bridge->cio2_hid_node);
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if (ret < 0) {
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dev_err(dev, "Failed to register the CIO2 HID node\n");
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goto err_free_bridge;
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}
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/*
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* Map the lane arrangement, which is fixed for the IPU3 (meaning we
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* only need one, rather than one per sensor). We include it as a
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* member of the struct cio2_bridge rather than a global variable so
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* that it survives if the module is unloaded along with the rest of
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* the struct.
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*/
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for (i = 0; i < CIO2_MAX_LANES; i++)
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bridge->data_lanes[i] = i + 1;
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ret = cio2_bridge_connect_sensors(bridge, cio2);
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if (ret || bridge->n_sensors == 0)
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goto err_unregister_cio2;
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dev_info(dev, "Connected %d cameras\n", bridge->n_sensors);
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fwnode = software_node_fwnode(&bridge->cio2_hid_node);
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if (!fwnode) {
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dev_err(dev, "Error getting fwnode from cio2 software_node\n");
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ret = -ENODEV;
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goto err_unregister_sensors;
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}
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set_secondary_fwnode(dev, fwnode);
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return 0;
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err_unregister_sensors:
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cio2_bridge_unregister_sensors(bridge);
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err_unregister_cio2:
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software_node_unregister(&bridge->cio2_hid_node);
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err_free_bridge:
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kfree(bridge);
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return ret;
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}
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