| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Greybus Camera protocol driver. |
| * |
| * Copyright 2015 Google Inc. |
| * Copyright 2015 Linaro Ltd. |
| */ |
| |
| #include <linux/debugfs.h> |
| #include <linux/fs.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/string.h> |
| #include <linux/uaccess.h> |
| #include <linux/vmalloc.h> |
| |
| #include "gb-camera.h" |
| #include "greybus.h" |
| #include "greybus_protocols.h" |
| |
| enum gb_camera_debugs_buffer_id { |
| GB_CAMERA_DEBUGFS_BUFFER_CAPABILITIES, |
| GB_CAMERA_DEBUGFS_BUFFER_STREAMS, |
| GB_CAMERA_DEBUGFS_BUFFER_CAPTURE, |
| GB_CAMERA_DEBUGFS_BUFFER_FLUSH, |
| GB_CAMERA_DEBUGFS_BUFFER_MAX, |
| }; |
| |
| struct gb_camera_debugfs_buffer { |
| char data[PAGE_SIZE]; |
| size_t length; |
| }; |
| |
| enum gb_camera_state { |
| GB_CAMERA_STATE_UNCONFIGURED, |
| GB_CAMERA_STATE_CONFIGURED, |
| }; |
| |
| /** |
| * struct gb_camera - A Greybus Camera Device |
| * @connection: the greybus connection for camera management |
| * @data_connection: the greybus connection for camera data |
| * @data_cport_id: the data CPort ID on the module side |
| * @mutex: protects the connection and state fields |
| * @state: the current module state |
| * @debugfs: debugfs entries for camera protocol operations testing |
| * @module: Greybus camera module registered to HOST processor. |
| */ |
| struct gb_camera { |
| struct gb_bundle *bundle; |
| struct gb_connection *connection; |
| struct gb_connection *data_connection; |
| u16 data_cport_id; |
| |
| struct mutex mutex; |
| enum gb_camera_state state; |
| |
| struct { |
| struct dentry *root; |
| struct gb_camera_debugfs_buffer *buffers; |
| } debugfs; |
| |
| struct gb_camera_module module; |
| }; |
| |
| struct gb_camera_stream_config { |
| unsigned int width; |
| unsigned int height; |
| unsigned int format; |
| unsigned int vc; |
| unsigned int dt[2]; |
| unsigned int max_size; |
| }; |
| |
| struct gb_camera_fmt_info { |
| enum v4l2_mbus_pixelcode mbus_code; |
| unsigned int gb_format; |
| unsigned int bpp; |
| }; |
| |
| /* GB format to media code map */ |
| static const struct gb_camera_fmt_info gb_fmt_info[] = { |
| { |
| .mbus_code = V4L2_MBUS_FMT_UYVY8_1X16, |
| .gb_format = 0x01, |
| .bpp = 16, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_NV12_1x8, |
| .gb_format = 0x12, |
| .bpp = 12, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_NV21_1x8, |
| .gb_format = 0x13, |
| .bpp = 12, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_YU12_1x8, |
| .gb_format = 0x16, |
| .bpp = 12, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_YV12_1x8, |
| .gb_format = 0x17, |
| .bpp = 12, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_JPEG_1X8, |
| .gb_format = 0x40, |
| .bpp = 0, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_GB_CAM_METADATA_1X8, |
| .gb_format = 0x41, |
| .bpp = 0, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_GB_CAM_DEBUG_DATA_1X8, |
| .gb_format = 0x42, |
| .bpp = 0, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_SBGGR10_1X10, |
| .gb_format = 0x80, |
| .bpp = 10, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_SGBRG10_1X10, |
| .gb_format = 0x81, |
| .bpp = 10, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_SGRBG10_1X10, |
| .gb_format = 0x82, |
| .bpp = 10, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_SRGGB10_1X10, |
| .gb_format = 0x83, |
| .bpp = 10, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_SBGGR12_1X12, |
| .gb_format = 0x84, |
| .bpp = 12, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_SGBRG12_1X12, |
| .gb_format = 0x85, |
| .bpp = 12, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_SGRBG12_1X12, |
| .gb_format = 0x86, |
| .bpp = 12, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_SRGGB12_1X12, |
| .gb_format = 0x87, |
| .bpp = 12, |
| }, |
| }; |
| |
| static const struct gb_camera_fmt_info *gb_camera_get_format_info(u16 gb_fmt) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(gb_fmt_info); i++) { |
| if (gb_fmt_info[i].gb_format == gb_fmt) |
| return &gb_fmt_info[i]; |
| } |
| |
| return NULL; |
| } |
| |
| #define ES2_APB_CDSI0_CPORT 16 |
| #define ES2_APB_CDSI1_CPORT 17 |
| |
| #define GB_CAMERA_MAX_SETTINGS_SIZE 8192 |
| |
| #define gcam_dbg(gcam, format...) dev_dbg(&gcam->bundle->dev, format) |
| #define gcam_info(gcam, format...) dev_info(&gcam->bundle->dev, format) |
| #define gcam_err(gcam, format...) dev_err(&gcam->bundle->dev, format) |
| |
| static int gb_camera_operation_sync_flags(struct gb_connection *connection, |
| int type, unsigned int flags, |
| void *request, size_t request_size, |
| void *response, size_t *response_size) |
| { |
| struct gb_operation *operation; |
| int ret; |
| |
| operation = gb_operation_create_flags(connection, type, request_size, |
| *response_size, flags, |
| GFP_KERNEL); |
| if (!operation) |
| return -ENOMEM; |
| |
| if (request_size) |
| memcpy(operation->request->payload, request, request_size); |
| |
| ret = gb_operation_request_send_sync(operation); |
| if (ret) { |
| dev_err(&connection->hd->dev, |
| "%s: synchronous operation of type 0x%02x failed: %d\n", |
| connection->name, type, ret); |
| } else { |
| *response_size = operation->response->payload_size; |
| |
| if (operation->response->payload_size) |
| memcpy(response, operation->response->payload, |
| operation->response->payload_size); |
| } |
| |
| gb_operation_put(operation); |
| |
| return ret; |
| } |
| |
| static int gb_camera_get_max_pkt_size(struct gb_camera *gcam, |
| struct gb_camera_configure_streams_response *resp) |
| { |
| unsigned int max_pkt_size = 0; |
| unsigned int i; |
| |
| for (i = 0; i < resp->num_streams; i++) { |
| struct gb_camera_stream_config_response *cfg = &resp->config[i]; |
| const struct gb_camera_fmt_info *fmt_info; |
| unsigned int pkt_size; |
| |
| fmt_info = gb_camera_get_format_info(cfg->format); |
| if (!fmt_info) { |
| gcam_err(gcam, "unsupported greybus image format: %d\n", |
| cfg->format); |
| return -EIO; |
| } |
| |
| if (fmt_info->bpp == 0) { |
| pkt_size = le32_to_cpu(cfg->max_pkt_size); |
| |
| if (pkt_size == 0) { |
| gcam_err(gcam, |
| "Stream %u: invalid zero maximum packet size\n", |
| i); |
| return -EIO; |
| } |
| } else { |
| pkt_size = le16_to_cpu(cfg->width) * fmt_info->bpp / 8; |
| |
| if (pkt_size != le32_to_cpu(cfg->max_pkt_size)) { |
| gcam_err(gcam, |
| "Stream %u: maximum packet size mismatch (%u/%u)\n", |
| i, pkt_size, cfg->max_pkt_size); |
| return -EIO; |
| } |
| } |
| |
| max_pkt_size = max(pkt_size, max_pkt_size); |
| } |
| |
| return max_pkt_size; |
| } |
| |
| /* |
| * Validate the stream configuration response verifying padding is correctly |
| * set and the returned number of streams is supported |
| */ |
| static const int gb_camera_configure_streams_validate_response( |
| struct gb_camera *gcam, |
| struct gb_camera_configure_streams_response *resp, |
| unsigned int nstreams) |
| { |
| unsigned int i; |
| |
| /* Validate the returned response structure */ |
| if (resp->padding[0] || resp->padding[1]) { |
| gcam_err(gcam, "response padding != 0\n"); |
| return -EIO; |
| } |
| |
| if (resp->num_streams > nstreams) { |
| gcam_err(gcam, "got #streams %u > request %u\n", |
| resp->num_streams, nstreams); |
| return -EIO; |
| } |
| |
| for (i = 0; i < resp->num_streams; i++) { |
| struct gb_camera_stream_config_response *cfg = &resp->config[i]; |
| |
| if (cfg->padding) { |
| gcam_err(gcam, "stream #%u padding != 0\n", i); |
| return -EIO; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* ----------------------------------------------------------------------------- |
| * Hardware Configuration |
| */ |
| |
| static int gb_camera_set_intf_power_mode(struct gb_camera *gcam, u8 intf_id, |
| bool hs) |
| { |
| struct gb_svc *svc = gcam->connection->hd->svc; |
| int ret; |
| |
| if (hs) |
| ret = gb_svc_intf_set_power_mode(svc, intf_id, |
| GB_SVC_UNIPRO_HS_SERIES_A, |
| GB_SVC_UNIPRO_FAST_MODE, 2, 2, |
| GB_SVC_SMALL_AMPLITUDE, |
| GB_SVC_NO_DE_EMPHASIS, |
| GB_SVC_UNIPRO_FAST_MODE, 2, 2, |
| GB_SVC_PWRM_RXTERMINATION | |
| GB_SVC_PWRM_TXTERMINATION, 0, |
| NULL, NULL); |
| else |
| ret = gb_svc_intf_set_power_mode(svc, intf_id, |
| GB_SVC_UNIPRO_HS_SERIES_A, |
| GB_SVC_UNIPRO_SLOW_AUTO_MODE, |
| 2, 1, |
| GB_SVC_SMALL_AMPLITUDE, |
| GB_SVC_NO_DE_EMPHASIS, |
| GB_SVC_UNIPRO_SLOW_AUTO_MODE, |
| 2, 1, |
| 0, 0, |
| NULL, NULL); |
| |
| return ret; |
| } |
| |
| static int gb_camera_set_power_mode(struct gb_camera *gcam, bool hs) |
| { |
| struct gb_interface *intf = gcam->connection->intf; |
| struct gb_svc *svc = gcam->connection->hd->svc; |
| int ret; |
| |
| ret = gb_camera_set_intf_power_mode(gcam, intf->interface_id, hs); |
| if (ret < 0) { |
| gcam_err(gcam, "failed to set module interface to %s (%d)\n", |
| hs ? "HS" : "PWM", ret); |
| return ret; |
| } |
| |
| ret = gb_camera_set_intf_power_mode(gcam, svc->ap_intf_id, hs); |
| if (ret < 0) { |
| gb_camera_set_intf_power_mode(gcam, intf->interface_id, !hs); |
| gcam_err(gcam, "failed to set AP interface to %s (%d)\n", |
| hs ? "HS" : "PWM", ret); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| struct ap_csi_config_request { |
| __u8 csi_id; |
| __u8 flags; |
| #define GB_CAMERA_CSI_FLAG_CLOCK_CONTINUOUS 0x01 |
| __u8 num_lanes; |
| __u8 padding; |
| __le32 csi_clk_freq; |
| __le32 max_pkt_size; |
| } __packed; |
| |
| /* |
| * TODO: Compute the number of lanes dynamically based on bandwidth |
| * requirements. |
| */ |
| #define GB_CAMERA_CSI_NUM_DATA_LANES 4 |
| |
| #define GB_CAMERA_CSI_CLK_FREQ_MAX 999000000U |
| #define GB_CAMERA_CSI_CLK_FREQ_MIN 100000000U |
| #define GB_CAMERA_CSI_CLK_FREQ_MARGIN 150000000U |
| |
| static int gb_camera_setup_data_connection(struct gb_camera *gcam, |
| struct gb_camera_configure_streams_response *resp, |
| struct gb_camera_csi_params *csi_params) |
| { |
| struct ap_csi_config_request csi_cfg; |
| struct gb_connection *conn; |
| unsigned int clk_freq; |
| int ret; |
| |
| /* |
| * Create the data connection between the camera module data CPort and |
| * APB CDSI1. The CDSI1 CPort ID is hardcoded by the ES2 bridge. |
| */ |
| conn = gb_connection_create_offloaded(gcam->bundle, gcam->data_cport_id, |
| GB_CONNECTION_FLAG_NO_FLOWCTRL | |
| GB_CONNECTION_FLAG_CDSI1); |
| if (IS_ERR(conn)) |
| return PTR_ERR(conn); |
| |
| gcam->data_connection = conn; |
| gb_connection_set_data(conn, gcam); |
| |
| ret = gb_connection_enable(conn); |
| if (ret) |
| goto error_conn_destroy; |
| |
| /* Set the UniPro link to high speed mode. */ |
| ret = gb_camera_set_power_mode(gcam, true); |
| if (ret < 0) |
| goto error_conn_disable; |
| |
| /* |
| * Configure the APB-A CSI-2 transmitter. |
| * |
| * Hardcode the number of lanes to 4 and compute the bus clock frequency |
| * based on the module bandwidth requirements with a safety margin. |
| */ |
| memset(&csi_cfg, 0, sizeof(csi_cfg)); |
| csi_cfg.csi_id = 1; |
| csi_cfg.flags = 0; |
| csi_cfg.num_lanes = GB_CAMERA_CSI_NUM_DATA_LANES; |
| |
| clk_freq = resp->data_rate / 2 / GB_CAMERA_CSI_NUM_DATA_LANES; |
| clk_freq = clamp(clk_freq + GB_CAMERA_CSI_CLK_FREQ_MARGIN, |
| GB_CAMERA_CSI_CLK_FREQ_MIN, |
| GB_CAMERA_CSI_CLK_FREQ_MAX); |
| csi_cfg.csi_clk_freq = clk_freq; |
| |
| ret = gb_camera_get_max_pkt_size(gcam, resp); |
| if (ret < 0) { |
| ret = -EIO; |
| goto error_power; |
| } |
| csi_cfg.max_pkt_size = ret; |
| |
| ret = gb_hd_output(gcam->connection->hd, &csi_cfg, |
| sizeof(csi_cfg), |
| GB_APB_REQUEST_CSI_TX_CONTROL, false); |
| if (ret < 0) { |
| gcam_err(gcam, "failed to start the CSI transmitter\n"); |
| goto error_power; |
| } |
| |
| if (csi_params) { |
| csi_params->clk_freq = csi_cfg.csi_clk_freq; |
| csi_params->num_lanes = csi_cfg.num_lanes; |
| } |
| |
| return 0; |
| |
| error_power: |
| gb_camera_set_power_mode(gcam, false); |
| error_conn_disable: |
| gb_connection_disable(gcam->data_connection); |
| error_conn_destroy: |
| gb_connection_destroy(gcam->data_connection); |
| gcam->data_connection = NULL; |
| return ret; |
| } |
| |
| static void gb_camera_teardown_data_connection(struct gb_camera *gcam) |
| { |
| struct ap_csi_config_request csi_cfg; |
| int ret; |
| |
| /* Stop the APB1 CSI transmitter. */ |
| memset(&csi_cfg, 0, sizeof(csi_cfg)); |
| csi_cfg.csi_id = 1; |
| |
| ret = gb_hd_output(gcam->connection->hd, &csi_cfg, |
| sizeof(csi_cfg), |
| GB_APB_REQUEST_CSI_TX_CONTROL, false); |
| |
| if (ret < 0) |
| gcam_err(gcam, "failed to stop the CSI transmitter\n"); |
| |
| /* Set the UniPro link to low speed mode. */ |
| gb_camera_set_power_mode(gcam, false); |
| |
| /* Destroy the data connection. */ |
| gb_connection_disable(gcam->data_connection); |
| gb_connection_destroy(gcam->data_connection); |
| gcam->data_connection = NULL; |
| } |
| |
| /* ----------------------------------------------------------------------------- |
| * Camera Protocol Operations |
| */ |
| |
| static int gb_camera_capabilities(struct gb_camera *gcam, |
| u8 *capabilities, size_t *size) |
| { |
| int ret; |
| |
| ret = gb_pm_runtime_get_sync(gcam->bundle); |
| if (ret) |
| return ret; |
| |
| mutex_lock(&gcam->mutex); |
| |
| if (!gcam->connection) { |
| ret = -EINVAL; |
| goto done; |
| } |
| |
| ret = gb_camera_operation_sync_flags(gcam->connection, |
| GB_CAMERA_TYPE_CAPABILITIES, |
| GB_OPERATION_FLAG_SHORT_RESPONSE, |
| NULL, 0, |
| (void *)capabilities, size); |
| if (ret) |
| gcam_err(gcam, "failed to retrieve capabilities: %d\n", ret); |
| |
| done: |
| mutex_unlock(&gcam->mutex); |
| |
| gb_pm_runtime_put_autosuspend(gcam->bundle); |
| |
| return ret; |
| } |
| |
| static int gb_camera_configure_streams(struct gb_camera *gcam, |
| unsigned int *num_streams, |
| unsigned int *flags, |
| struct gb_camera_stream_config *streams, |
| struct gb_camera_csi_params *csi_params) |
| { |
| struct gb_camera_configure_streams_request *req; |
| struct gb_camera_configure_streams_response *resp; |
| unsigned int nstreams = *num_streams; |
| unsigned int i; |
| size_t req_size; |
| size_t resp_size; |
| int ret; |
| |
| if (nstreams > GB_CAMERA_MAX_STREAMS) |
| return -EINVAL; |
| |
| req_size = sizeof(*req) + nstreams * sizeof(req->config[0]); |
| resp_size = sizeof(*resp) + nstreams * sizeof(resp->config[0]); |
| |
| req = kmalloc(req_size, GFP_KERNEL); |
| resp = kmalloc(resp_size, GFP_KERNEL); |
| if (!req || !resp) { |
| kfree(req); |
| kfree(resp); |
| return -ENOMEM; |
| } |
| |
| req->num_streams = nstreams; |
| req->flags = *flags; |
| req->padding = 0; |
| |
| for (i = 0; i < nstreams; ++i) { |
| struct gb_camera_stream_config_request *cfg = &req->config[i]; |
| |
| cfg->width = cpu_to_le16(streams[i].width); |
| cfg->height = cpu_to_le16(streams[i].height); |
| cfg->format = cpu_to_le16(streams[i].format); |
| cfg->padding = 0; |
| } |
| |
| mutex_lock(&gcam->mutex); |
| |
| ret = gb_pm_runtime_get_sync(gcam->bundle); |
| if (ret) |
| goto done_skip_pm_put; |
| |
| if (!gcam->connection) { |
| ret = -EINVAL; |
| goto done; |
| } |
| |
| ret = gb_camera_operation_sync_flags(gcam->connection, |
| GB_CAMERA_TYPE_CONFIGURE_STREAMS, |
| GB_OPERATION_FLAG_SHORT_RESPONSE, |
| req, req_size, |
| resp, &resp_size); |
| if (ret < 0) |
| goto done; |
| |
| ret = gb_camera_configure_streams_validate_response(gcam, resp, |
| nstreams); |
| if (ret < 0) |
| goto done; |
| |
| *flags = resp->flags; |
| *num_streams = resp->num_streams; |
| |
| for (i = 0; i < resp->num_streams; ++i) { |
| struct gb_camera_stream_config_response *cfg = &resp->config[i]; |
| |
| streams[i].width = le16_to_cpu(cfg->width); |
| streams[i].height = le16_to_cpu(cfg->height); |
| streams[i].format = le16_to_cpu(cfg->format); |
| streams[i].vc = cfg->virtual_channel; |
| streams[i].dt[0] = cfg->data_type[0]; |
| streams[i].dt[1] = cfg->data_type[1]; |
| streams[i].max_size = le32_to_cpu(cfg->max_size); |
| } |
| |
| if ((resp->flags & GB_CAMERA_CONFIGURE_STREAMS_ADJUSTED) || |
| (req->flags & GB_CAMERA_CONFIGURE_STREAMS_TEST_ONLY)) |
| goto done; |
| |
| if (gcam->state == GB_CAMERA_STATE_CONFIGURED) { |
| gb_camera_teardown_data_connection(gcam); |
| gcam->state = GB_CAMERA_STATE_UNCONFIGURED; |
| |
| /* |
| * When unconfiguring streams release the PM runtime reference |
| * that was acquired when streams were configured. The bundle |
| * won't be suspended until the PM runtime reference acquired at |
| * the beginning of this function gets released right before |
| * returning. |
| */ |
| gb_pm_runtime_put_noidle(gcam->bundle); |
| } |
| |
| if (resp->num_streams == 0) |
| goto done; |
| |
| /* |
| * Make sure the bundle won't be suspended until streams get |
| * unconfigured after the stream is configured successfully |
| */ |
| gb_pm_runtime_get_noresume(gcam->bundle); |
| |
| /* Setup CSI-2 connection from APB-A to AP */ |
| ret = gb_camera_setup_data_connection(gcam, resp, csi_params); |
| if (ret < 0) { |
| memset(req, 0, sizeof(*req)); |
| gb_operation_sync(gcam->connection, |
| GB_CAMERA_TYPE_CONFIGURE_STREAMS, |
| req, sizeof(*req), |
| resp, sizeof(*resp)); |
| *flags = 0; |
| *num_streams = 0; |
| gb_pm_runtime_put_noidle(gcam->bundle); |
| goto done; |
| } |
| |
| gcam->state = GB_CAMERA_STATE_CONFIGURED; |
| |
| done: |
| gb_pm_runtime_put_autosuspend(gcam->bundle); |
| |
| done_skip_pm_put: |
| mutex_unlock(&gcam->mutex); |
| kfree(req); |
| kfree(resp); |
| return ret; |
| } |
| |
| static int gb_camera_capture(struct gb_camera *gcam, u32 request_id, |
| unsigned int streams, unsigned int num_frames, |
| size_t settings_size, const void *settings) |
| { |
| struct gb_camera_capture_request *req; |
| size_t req_size; |
| int ret; |
| |
| if (settings_size > GB_CAMERA_MAX_SETTINGS_SIZE) |
| return -EINVAL; |
| |
| req_size = sizeof(*req) + settings_size; |
| req = kmalloc(req_size, GFP_KERNEL); |
| if (!req) |
| return -ENOMEM; |
| |
| req->request_id = cpu_to_le32(request_id); |
| req->streams = streams; |
| req->padding = 0; |
| req->num_frames = cpu_to_le16(num_frames); |
| memcpy(req->settings, settings, settings_size); |
| |
| mutex_lock(&gcam->mutex); |
| |
| if (!gcam->connection) { |
| ret = -EINVAL; |
| goto done; |
| } |
| |
| ret = gb_operation_sync(gcam->connection, GB_CAMERA_TYPE_CAPTURE, |
| req, req_size, NULL, 0); |
| done: |
| mutex_unlock(&gcam->mutex); |
| |
| kfree(req); |
| |
| return ret; |
| } |
| |
| static int gb_camera_flush(struct gb_camera *gcam, u32 *request_id) |
| { |
| struct gb_camera_flush_response resp; |
| int ret; |
| |
| mutex_lock(&gcam->mutex); |
| |
| if (!gcam->connection) { |
| ret = -EINVAL; |
| goto done; |
| } |
| |
| ret = gb_operation_sync(gcam->connection, GB_CAMERA_TYPE_FLUSH, NULL, 0, |
| &resp, sizeof(resp)); |
| |
| if (ret < 0) |
| goto done; |
| |
| if (request_id) |
| *request_id = le32_to_cpu(resp.request_id); |
| |
| done: |
| mutex_unlock(&gcam->mutex); |
| |
| return ret; |
| } |
| |
| static int gb_camera_request_handler(struct gb_operation *op) |
| { |
| struct gb_camera *gcam = gb_connection_get_data(op->connection); |
| struct gb_camera_metadata_request *payload; |
| struct gb_message *request; |
| |
| if (op->type != GB_CAMERA_TYPE_METADATA) { |
| gcam_err(gcam, "Unsupported unsolicited event: %u\n", op->type); |
| return -EINVAL; |
| } |
| |
| request = op->request; |
| |
| if (request->payload_size < sizeof(*payload)) { |
| gcam_err(gcam, "Wrong event size received (%zu < %zu)\n", |
| request->payload_size, sizeof(*payload)); |
| return -EINVAL; |
| } |
| |
| payload = request->payload; |
| |
| gcam_dbg(gcam, "received metadata for request %u, frame %u, stream %u\n", |
| payload->request_id, payload->frame_number, payload->stream); |
| |
| return 0; |
| } |
| |
| /* ----------------------------------------------------------------------------- |
| * Interface with HOST gmp camera. |
| */ |
| static unsigned int gb_camera_mbus_to_gb(enum v4l2_mbus_pixelcode mbus_code) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(gb_fmt_info); i++) { |
| if (gb_fmt_info[i].mbus_code == mbus_code) |
| return gb_fmt_info[i].gb_format; |
| } |
| return gb_fmt_info[0].gb_format; |
| } |
| |
| static enum v4l2_mbus_pixelcode gb_camera_gb_to_mbus(u16 gb_fmt) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(gb_fmt_info); i++) { |
| if (gb_fmt_info[i].gb_format == gb_fmt) |
| return gb_fmt_info[i].mbus_code; |
| } |
| return gb_fmt_info[0].mbus_code; |
| } |
| |
| static ssize_t gb_camera_op_capabilities(void *priv, char *data, size_t len) |
| { |
| struct gb_camera *gcam = priv; |
| size_t capabilities_len = len; |
| int ret; |
| |
| ret = gb_camera_capabilities(gcam, data, &capabilities_len); |
| if (ret) |
| return ret; |
| |
| return capabilities_len; |
| } |
| |
| static int gb_camera_op_configure_streams(void *priv, unsigned int *nstreams, |
| unsigned int *flags, struct gb_camera_stream *streams, |
| struct gb_camera_csi_params *csi_params) |
| { |
| struct gb_camera *gcam = priv; |
| struct gb_camera_stream_config *gb_streams; |
| unsigned int gb_flags = 0; |
| unsigned int gb_nstreams = *nstreams; |
| unsigned int i; |
| int ret; |
| |
| if (gb_nstreams > GB_CAMERA_MAX_STREAMS) |
| return -EINVAL; |
| |
| gb_streams = kcalloc(gb_nstreams, sizeof(*gb_streams), GFP_KERNEL); |
| if (!gb_streams) |
| return -ENOMEM; |
| |
| for (i = 0; i < gb_nstreams; i++) { |
| gb_streams[i].width = streams[i].width; |
| gb_streams[i].height = streams[i].height; |
| gb_streams[i].format = |
| gb_camera_mbus_to_gb(streams[i].pixel_code); |
| } |
| |
| if (*flags & GB_CAMERA_IN_FLAG_TEST) |
| gb_flags |= GB_CAMERA_CONFIGURE_STREAMS_TEST_ONLY; |
| |
| ret = gb_camera_configure_streams(gcam, &gb_nstreams, |
| &gb_flags, gb_streams, csi_params); |
| if (ret < 0) |
| goto done; |
| if (gb_nstreams > *nstreams) { |
| ret = -EINVAL; |
| goto done; |
| } |
| |
| *flags = 0; |
| if (gb_flags & GB_CAMERA_CONFIGURE_STREAMS_ADJUSTED) |
| *flags |= GB_CAMERA_OUT_FLAG_ADJUSTED; |
| |
| for (i = 0; i < gb_nstreams; i++) { |
| streams[i].width = gb_streams[i].width; |
| streams[i].height = gb_streams[i].height; |
| streams[i].vc = gb_streams[i].vc; |
| streams[i].dt[0] = gb_streams[i].dt[0]; |
| streams[i].dt[1] = gb_streams[i].dt[1]; |
| streams[i].max_size = gb_streams[i].max_size; |
| streams[i].pixel_code = |
| gb_camera_gb_to_mbus(gb_streams[i].format); |
| } |
| *nstreams = gb_nstreams; |
| |
| done: |
| kfree(gb_streams); |
| return ret; |
| } |
| |
| static int gb_camera_op_capture(void *priv, u32 request_id, |
| unsigned int streams, unsigned int num_frames, |
| size_t settings_size, const void *settings) |
| { |
| struct gb_camera *gcam = priv; |
| |
| return gb_camera_capture(gcam, request_id, streams, num_frames, |
| settings_size, settings); |
| } |
| |
| static int gb_camera_op_flush(void *priv, u32 *request_id) |
| { |
| struct gb_camera *gcam = priv; |
| |
| return gb_camera_flush(gcam, request_id); |
| } |
| |
| static const struct gb_camera_ops gb_cam_ops = { |
| .capabilities = gb_camera_op_capabilities, |
| .configure_streams = gb_camera_op_configure_streams, |
| .capture = gb_camera_op_capture, |
| .flush = gb_camera_op_flush, |
| }; |
| |
| /* ----------------------------------------------------------------------------- |
| * DebugFS |
| */ |
| |
| static ssize_t gb_camera_debugfs_capabilities(struct gb_camera *gcam, |
| char *buf, size_t len) |
| { |
| struct gb_camera_debugfs_buffer *buffer = |
| &gcam->debugfs.buffers[GB_CAMERA_DEBUGFS_BUFFER_CAPABILITIES]; |
| size_t size = 1024; |
| unsigned int i; |
| u8 *caps; |
| int ret; |
| |
| caps = kmalloc(size, GFP_KERNEL); |
| if (!caps) |
| return -ENOMEM; |
| |
| ret = gb_camera_capabilities(gcam, caps, &size); |
| if (ret < 0) |
| goto done; |
| |
| /* |
| * hex_dump_to_buffer() doesn't return the number of bytes dumped prior |
| * to v4.0, we need our own implementation :-( |
| */ |
| buffer->length = 0; |
| |
| for (i = 0; i < size; i += 16) { |
| unsigned int nbytes = min_t(unsigned int, size - i, 16); |
| |
| buffer->length += sprintf(buffer->data + buffer->length, |
| "%*ph\n", nbytes, caps + i); |
| } |
| |
| done: |
| kfree(caps); |
| return ret; |
| } |
| |
| static ssize_t gb_camera_debugfs_configure_streams(struct gb_camera *gcam, |
| char *buf, size_t len) |
| { |
| struct gb_camera_debugfs_buffer *buffer = |
| &gcam->debugfs.buffers[GB_CAMERA_DEBUGFS_BUFFER_STREAMS]; |
| struct gb_camera_stream_config *streams; |
| unsigned int nstreams; |
| unsigned int flags; |
| unsigned int i; |
| char *token; |
| int ret; |
| |
| /* Retrieve number of streams to configure */ |
| token = strsep(&buf, ";"); |
| if (!token) |
| return -EINVAL; |
| |
| ret = kstrtouint(token, 10, &nstreams); |
| if (ret < 0) |
| return ret; |
| |
| if (nstreams > GB_CAMERA_MAX_STREAMS) |
| return -EINVAL; |
| |
| token = strsep(&buf, ";"); |
| if (!token) |
| return -EINVAL; |
| |
| ret = kstrtouint(token, 10, &flags); |
| if (ret < 0) |
| return ret; |
| |
| /* For each stream to configure parse width, height and format */ |
| streams = kcalloc(nstreams, sizeof(*streams), GFP_KERNEL); |
| if (!streams) |
| return -ENOMEM; |
| |
| for (i = 0; i < nstreams; ++i) { |
| struct gb_camera_stream_config *stream = &streams[i]; |
| |
| /* width */ |
| token = strsep(&buf, ";"); |
| if (!token) { |
| ret = -EINVAL; |
| goto done; |
| } |
| ret = kstrtouint(token, 10, &stream->width); |
| if (ret < 0) |
| goto done; |
| |
| /* height */ |
| token = strsep(&buf, ";"); |
| if (!token) |
| goto done; |
| |
| ret = kstrtouint(token, 10, &stream->height); |
| if (ret < 0) |
| goto done; |
| |
| /* Image format code */ |
| token = strsep(&buf, ";"); |
| if (!token) |
| goto done; |
| |
| ret = kstrtouint(token, 16, &stream->format); |
| if (ret < 0) |
| goto done; |
| } |
| |
| ret = gb_camera_configure_streams(gcam, &nstreams, &flags, streams, |
| NULL); |
| if (ret < 0) |
| goto done; |
| |
| buffer->length = sprintf(buffer->data, "%u;%u;", nstreams, flags); |
| |
| for (i = 0; i < nstreams; ++i) { |
| struct gb_camera_stream_config *stream = &streams[i]; |
| |
| buffer->length += sprintf(buffer->data + buffer->length, |
| "%u;%u;%u;%u;%u;%u;%u;", |
| stream->width, stream->height, |
| stream->format, stream->vc, |
| stream->dt[0], stream->dt[1], |
| stream->max_size); |
| } |
| |
| ret = len; |
| |
| done: |
| kfree(streams); |
| return ret; |
| }; |
| |
| static ssize_t gb_camera_debugfs_capture(struct gb_camera *gcam, |
| char *buf, size_t len) |
| { |
| unsigned int request_id; |
| unsigned int streams_mask; |
| unsigned int num_frames; |
| char *token; |
| int ret; |
| |
| /* Request id */ |
| token = strsep(&buf, ";"); |
| if (!token) |
| return -EINVAL; |
| ret = kstrtouint(token, 10, &request_id); |
| if (ret < 0) |
| return ret; |
| |
| /* Stream mask */ |
| token = strsep(&buf, ";"); |
| if (!token) |
| return -EINVAL; |
| ret = kstrtouint(token, 16, &streams_mask); |
| if (ret < 0) |
| return ret; |
| |
| /* number of frames */ |
| token = strsep(&buf, ";"); |
| if (!token) |
| return -EINVAL; |
| ret = kstrtouint(token, 10, &num_frames); |
| if (ret < 0) |
| return ret; |
| |
| ret = gb_camera_capture(gcam, request_id, streams_mask, num_frames, 0, |
| NULL); |
| if (ret < 0) |
| return ret; |
| |
| return len; |
| } |
| |
| static ssize_t gb_camera_debugfs_flush(struct gb_camera *gcam, |
| char *buf, size_t len) |
| { |
| struct gb_camera_debugfs_buffer *buffer = |
| &gcam->debugfs.buffers[GB_CAMERA_DEBUGFS_BUFFER_FLUSH]; |
| unsigned int req_id; |
| int ret; |
| |
| ret = gb_camera_flush(gcam, &req_id); |
| if (ret < 0) |
| return ret; |
| |
| buffer->length = sprintf(buffer->data, "%u", req_id); |
| |
| return len; |
| } |
| |
| struct gb_camera_debugfs_entry { |
| const char *name; |
| unsigned int mask; |
| unsigned int buffer; |
| ssize_t (*execute)(struct gb_camera *gcam, char *buf, size_t len); |
| }; |
| |
| static const struct gb_camera_debugfs_entry gb_camera_debugfs_entries[] = { |
| { |
| .name = "capabilities", |
| .mask = S_IFREG | 0444, |
| .buffer = GB_CAMERA_DEBUGFS_BUFFER_CAPABILITIES, |
| .execute = gb_camera_debugfs_capabilities, |
| }, { |
| .name = "configure_streams", |
| .mask = S_IFREG | 0666, |
| .buffer = GB_CAMERA_DEBUGFS_BUFFER_STREAMS, |
| .execute = gb_camera_debugfs_configure_streams, |
| }, { |
| .name = "capture", |
| .mask = S_IFREG | 0666, |
| .buffer = GB_CAMERA_DEBUGFS_BUFFER_CAPTURE, |
| .execute = gb_camera_debugfs_capture, |
| }, { |
| .name = "flush", |
| .mask = S_IFREG | 0666, |
| .buffer = GB_CAMERA_DEBUGFS_BUFFER_FLUSH, |
| .execute = gb_camera_debugfs_flush, |
| }, |
| }; |
| |
| static ssize_t gb_camera_debugfs_read(struct file *file, char __user *buf, |
| size_t len, loff_t *offset) |
| { |
| const struct gb_camera_debugfs_entry *op = file->private_data; |
| struct gb_camera *gcam = file_inode(file)->i_private; |
| struct gb_camera_debugfs_buffer *buffer; |
| ssize_t ret; |
| |
| /* For read-only entries the operation is triggered by a read. */ |
| if (!(op->mask & 0222)) { |
| ret = op->execute(gcam, NULL, 0); |
| if (ret < 0) |
| return ret; |
| } |
| |
| buffer = &gcam->debugfs.buffers[op->buffer]; |
| |
| return simple_read_from_buffer(buf, len, offset, buffer->data, |
| buffer->length); |
| } |
| |
| static ssize_t gb_camera_debugfs_write(struct file *file, |
| const char __user *buf, size_t len, |
| loff_t *offset) |
| { |
| const struct gb_camera_debugfs_entry *op = file->private_data; |
| struct gb_camera *gcam = file_inode(file)->i_private; |
| ssize_t ret; |
| char *kbuf; |
| |
| if (len > 1024) |
| return -EINVAL; |
| |
| kbuf = kmalloc(len + 1, GFP_KERNEL); |
| if (!kbuf) |
| return -ENOMEM; |
| |
| if (copy_from_user(kbuf, buf, len)) { |
| ret = -EFAULT; |
| goto done; |
| } |
| |
| kbuf[len] = '\0'; |
| |
| ret = op->execute(gcam, kbuf, len); |
| |
| done: |
| kfree(kbuf); |
| return ret; |
| } |
| |
| static int gb_camera_debugfs_open(struct inode *inode, struct file *file) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(gb_camera_debugfs_entries); ++i) { |
| const struct gb_camera_debugfs_entry *entry = |
| &gb_camera_debugfs_entries[i]; |
| |
| if (!strcmp(file->f_path.dentry->d_iname, entry->name)) { |
| file->private_data = (void *)entry; |
| break; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static const struct file_operations gb_camera_debugfs_ops = { |
| .open = gb_camera_debugfs_open, |
| .read = gb_camera_debugfs_read, |
| .write = gb_camera_debugfs_write, |
| }; |
| |
| static int gb_camera_debugfs_init(struct gb_camera *gcam) |
| { |
| struct gb_connection *connection = gcam->connection; |
| char dirname[27]; |
| unsigned int i; |
| |
| /* |
| * Create root debugfs entry and a file entry for each camera operation. |
| */ |
| snprintf(dirname, 27, "camera-%u.%u", connection->intf->interface_id, |
| gcam->bundle->id); |
| |
| gcam->debugfs.root = debugfs_create_dir(dirname, gb_debugfs_get()); |
| |
| gcam->debugfs.buffers = |
| vmalloc(array_size(GB_CAMERA_DEBUGFS_BUFFER_MAX, |
| sizeof(*gcam->debugfs.buffers))); |
| if (!gcam->debugfs.buffers) |
| return -ENOMEM; |
| |
| for (i = 0; i < ARRAY_SIZE(gb_camera_debugfs_entries); ++i) { |
| const struct gb_camera_debugfs_entry *entry = |
| &gb_camera_debugfs_entries[i]; |
| |
| gcam->debugfs.buffers[i].length = 0; |
| |
| debugfs_create_file(entry->name, entry->mask, |
| gcam->debugfs.root, gcam, |
| &gb_camera_debugfs_ops); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void gb_camera_debugfs_cleanup(struct gb_camera *gcam) |
| { |
| debugfs_remove_recursive(gcam->debugfs.root); |
| |
| vfree(gcam->debugfs.buffers); |
| } |
| |
| /* ----------------------------------------------------------------------------- |
| * Init & Cleanup |
| */ |
| |
| static void gb_camera_cleanup(struct gb_camera *gcam) |
| { |
| gb_camera_debugfs_cleanup(gcam); |
| |
| mutex_lock(&gcam->mutex); |
| if (gcam->data_connection) { |
| gb_connection_disable(gcam->data_connection); |
| gb_connection_destroy(gcam->data_connection); |
| gcam->data_connection = NULL; |
| } |
| |
| if (gcam->connection) { |
| gb_connection_disable(gcam->connection); |
| gb_connection_destroy(gcam->connection); |
| gcam->connection = NULL; |
| } |
| mutex_unlock(&gcam->mutex); |
| } |
| |
| static void gb_camera_release_module(struct kref *ref) |
| { |
| struct gb_camera_module *cam_mod = |
| container_of(ref, struct gb_camera_module, refcount); |
| kfree(cam_mod->priv); |
| } |
| |
| static int gb_camera_probe(struct gb_bundle *bundle, |
| const struct greybus_bundle_id *id) |
| { |
| struct gb_connection *conn; |
| struct gb_camera *gcam; |
| u16 mgmt_cport_id = 0; |
| u16 data_cport_id = 0; |
| unsigned int i; |
| int ret; |
| |
| /* |
| * The camera bundle must contain exactly two CPorts, one for the |
| * camera management protocol and one for the camera data protocol. |
| */ |
| if (bundle->num_cports != 2) |
| return -ENODEV; |
| |
| for (i = 0; i < bundle->num_cports; ++i) { |
| struct greybus_descriptor_cport *desc = &bundle->cport_desc[i]; |
| |
| switch (desc->protocol_id) { |
| case GREYBUS_PROTOCOL_CAMERA_MGMT: |
| mgmt_cport_id = le16_to_cpu(desc->id); |
| break; |
| case GREYBUS_PROTOCOL_CAMERA_DATA: |
| data_cport_id = le16_to_cpu(desc->id); |
| break; |
| default: |
| return -ENODEV; |
| } |
| } |
| |
| if (!mgmt_cport_id || !data_cport_id) |
| return -ENODEV; |
| |
| gcam = kzalloc(sizeof(*gcam), GFP_KERNEL); |
| if (!gcam) |
| return -ENOMEM; |
| |
| mutex_init(&gcam->mutex); |
| |
| gcam->bundle = bundle; |
| gcam->state = GB_CAMERA_STATE_UNCONFIGURED; |
| gcam->data_cport_id = data_cport_id; |
| |
| conn = gb_connection_create(bundle, mgmt_cport_id, |
| gb_camera_request_handler); |
| if (IS_ERR(conn)) { |
| ret = PTR_ERR(conn); |
| goto error; |
| } |
| |
| gcam->connection = conn; |
| gb_connection_set_data(conn, gcam); |
| |
| ret = gb_connection_enable(conn); |
| if (ret) |
| goto error; |
| |
| ret = gb_camera_debugfs_init(gcam); |
| if (ret < 0) |
| goto error; |
| |
| gcam->module.priv = gcam; |
| gcam->module.ops = &gb_cam_ops; |
| gcam->module.interface_id = gcam->connection->intf->interface_id; |
| gcam->module.release = gb_camera_release_module; |
| ret = gb_camera_register(&gcam->module); |
| if (ret < 0) |
| goto error; |
| |
| greybus_set_drvdata(bundle, gcam); |
| |
| gb_pm_runtime_put_autosuspend(gcam->bundle); |
| |
| return 0; |
| |
| error: |
| gb_camera_cleanup(gcam); |
| kfree(gcam); |
| return ret; |
| } |
| |
| static void gb_camera_disconnect(struct gb_bundle *bundle) |
| { |
| struct gb_camera *gcam = greybus_get_drvdata(bundle); |
| int ret; |
| |
| ret = gb_pm_runtime_get_sync(bundle); |
| if (ret) |
| gb_pm_runtime_get_noresume(bundle); |
| |
| gb_camera_cleanup(gcam); |
| gb_camera_unregister(&gcam->module); |
| } |
| |
| static const struct greybus_bundle_id gb_camera_id_table[] = { |
| { GREYBUS_DEVICE_CLASS(GREYBUS_CLASS_CAMERA) }, |
| { }, |
| }; |
| |
| #ifdef CONFIG_PM |
| static int gb_camera_suspend(struct device *dev) |
| { |
| struct gb_bundle *bundle = to_gb_bundle(dev); |
| struct gb_camera *gcam = greybus_get_drvdata(bundle); |
| |
| if (gcam->data_connection) |
| gb_connection_disable(gcam->data_connection); |
| |
| gb_connection_disable(gcam->connection); |
| |
| return 0; |
| } |
| |
| static int gb_camera_resume(struct device *dev) |
| { |
| struct gb_bundle *bundle = to_gb_bundle(dev); |
| struct gb_camera *gcam = greybus_get_drvdata(bundle); |
| int ret; |
| |
| ret = gb_connection_enable(gcam->connection); |
| if (ret) { |
| gcam_err(gcam, "failed to enable connection: %d\n", ret); |
| return ret; |
| } |
| |
| if (gcam->data_connection) { |
| ret = gb_connection_enable(gcam->data_connection); |
| if (ret) { |
| gcam_err(gcam, |
| "failed to enable data connection: %d\n", ret); |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| #endif |
| |
| static const struct dev_pm_ops gb_camera_pm_ops = { |
| SET_RUNTIME_PM_OPS(gb_camera_suspend, gb_camera_resume, NULL) |
| }; |
| |
| static struct greybus_driver gb_camera_driver = { |
| .name = "camera", |
| .probe = gb_camera_probe, |
| .disconnect = gb_camera_disconnect, |
| .id_table = gb_camera_id_table, |
| .driver.pm = &gb_camera_pm_ops, |
| }; |
| |
| module_greybus_driver(gb_camera_driver); |
| |
| MODULE_LICENSE("GPL v2"); |