| /* |
| * Greybus Camera protocol driver. |
| * |
| * Copyright 2015 Google Inc. |
| * Copyright 2015 Linaro Ltd. |
| * |
| * Released under the GPLv2 only. |
| */ |
| |
| #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; |
| }; |
| |
| /** |
| * struct gb_camera - A Greybus Camera Device |
| * @connection: the greybus connection for camera control |
| * @data_connected: whether the data connection has been established |
| * @debugfs: debugfs entries for camera protocol operations testing |
| */ |
| struct gb_camera { |
| struct gb_connection *connection; |
| bool data_connected; |
| |
| struct { |
| struct dentry *root; |
| struct gb_camera_debugfs_buffer *buffers; |
| } debugfs; |
| }; |
| |
| 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_map { |
| enum v4l2_mbus_pixelcode mbus_code; |
| unsigned int gb_format; |
| }; |
| |
| /* GB format to media code map */ |
| static const struct gb_camera_fmt_map mbus_to_gbus_format[] = { |
| { |
| .mbus_code = V4L2_MBUS_FMT_UYVY8_1X16, |
| .gb_format = 0x01, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_NV12_1x8, |
| .gb_format = 0x12, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_NV21_1x8, |
| .gb_format = 0x13, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_YU12_1x8, |
| .gb_format = 0x16, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_YV12_1x8, |
| .gb_format = 0x17, |
| }, |
| { |
| .mbus_code = V4L2_MBUS_FMT_JPEG_1X8, |
| .gb_format = 0x40, |
| } |
| }; |
| |
| #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->connection->bundle->dev, format) |
| #define gcam_info(gcam, format...) \ |
| dev_info(&gcam->connection->bundle->dev, format) |
| #define gcam_err(gcam, format...) \ |
| dev_err(&gcam->connection->bundle->dev, format) |
| |
| /* ----------------------------------------------------------------------------- |
| * Camera Protocol Operations |
| */ |
| |
| 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_UNIPRO_FAST_MODE, 2, 2, |
| GB_SVC_PWRM_RXTERMINATION | |
| GB_SVC_PWRM_TXTERMINATION, 0); |
| else |
| ret = gb_svc_intf_set_power_mode(svc, intf_id, |
| GB_SVC_UNIPRO_HS_SERIES_A, |
| GB_SVC_UNIPRO_SLOW_AUTO_MODE, |
| 1, 2, |
| GB_SVC_UNIPRO_SLOW_AUTO_MODE, |
| 1, 2, |
| 0, 0); |
| |
| 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 bus_freq; |
| __le32 lines_per_second; |
| } __packed; |
| |
| 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_configure_streams_request *req; |
| struct gb_camera_configure_streams_response *resp; |
| struct ap_csi_config_request csi_cfg; |
| |
| 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) { |
| ret = -ENOMEM; |
| goto done; |
| } |
| |
| 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; |
| } |
| |
| ret = gb_operation_sync(gcam->connection, |
| GB_CAMERA_TYPE_CONFIGURE_STREAMS, |
| req, req_size, resp, resp_size); |
| if (ret < 0) |
| goto done; |
| |
| if (resp->num_streams > nstreams) { |
| gcam_dbg(gcam, "got #streams %u > request %u\n", |
| resp->num_streams, nstreams); |
| ret = -EIO; |
| goto done; |
| } |
| |
| if (resp->padding != 0) { |
| gcam_dbg(gcam, "response padding != 0"); |
| ret = -EIO; |
| goto done; |
| } |
| |
| for (i = 0; i < nstreams; ++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 (cfg->padding[0] || cfg->padding[1] || cfg->padding[2]) { |
| gcam_dbg(gcam, "stream #%u padding != 0", i); |
| ret = -EIO; |
| goto done; |
| } |
| } |
| |
| if ((resp->flags & GB_CAMERA_CONFIGURE_STREAMS_ADJUSTED) || |
| (*flags & GB_CAMERA_CONFIGURE_STREAMS_TEST_ONLY)) { |
| *flags = resp->flags; |
| *num_streams = resp->num_streams; |
| goto done; |
| } |
| |
| /* Setup unipro link speed. */ |
| ret = gb_camera_set_power_mode(gcam, nstreams != 0); |
| if (ret < 0) |
| goto done; |
| |
| /* |
| * Configure the APB1 CSI transmitter using the lines count reported by |
| * the camera module, but with hard-coded bus frequency and lanes number. |
| * |
| * TODO: use the clocking and size informations reported by camera module |
| * to compute the required CSI bandwidth, and configure the CSI receiver |
| * on AP side, and the CSI transmitter on APB1 side accordingly. |
| */ |
| memset(&csi_cfg, 0, sizeof(csi_cfg)); |
| |
| if (nstreams) { |
| csi_cfg.csi_id = 1; |
| csi_cfg.flags = 0; |
| csi_cfg.num_lanes = 4; |
| csi_cfg.bus_freq = cpu_to_le32(960000000); |
| csi_cfg.lines_per_second = resp->lines_per_second; |
| ret = gb_hd_output(gcam->connection->hd, &csi_cfg, |
| sizeof(csi_cfg), |
| GB_APB_REQUEST_CSI_TX_CONTROL, false); |
| } else { |
| 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 %s the CSI transmitter\n", |
| nstreams ? "start" : "stop"); |
| |
| *flags = resp->flags; |
| *num_streams = resp->num_streams; |
| ret = 0; |
| |
| done: |
| 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); |
| |
| ret = gb_operation_sync(gcam->connection, GB_CAMERA_TYPE_CAPTURE, |
| req, req_size, NULL, 0); |
| |
| kfree(req); |
| |
| return ret; |
| } |
| |
| static int gb_camera_flush(struct gb_camera *gcam, u32 *request_id) |
| { |
| struct gb_camera_flush_response resp; |
| int ret; |
| |
| ret = gb_operation_sync(gcam->connection, GB_CAMERA_TYPE_FLUSH, NULL, 0, |
| &resp, sizeof(resp)); |
| if (ret < 0) |
| return ret; |
| |
| if (request_id) |
| *request_id = le32_to_cpu(resp.request_id); |
| |
| return 0; |
| } |
| |
| static int gb_camera_event_recv(u8 type, struct gb_operation *op) |
| { |
| struct gb_camera *gcam = op->connection->private; |
| struct gb_camera_metadata_request *payload; |
| struct gb_message *request; |
| |
| if (type != GB_CAMERA_TYPE_METADATA) { |
| gcam_err(gcam, "Unsupported unsolicited event: %u\n", 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 ara camera. |
| */ |
| static unsigned int gb_camera_mbus_to_gb(enum v4l2_mbus_pixelcode mbus_code) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(mbus_to_gbus_format); i++) { |
| if (mbus_to_gbus_format[i].mbus_code == mbus_code) |
| return mbus_to_gbus_format[i].gb_format; |
| } |
| return mbus_to_gbus_format[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(mbus_to_gbus_format); i++) { |
| if (mbus_to_gbus_format[i].gb_format == gb_fmt) |
| return mbus_to_gbus_format[i].mbus_code; |
| } |
| return mbus_to_gbus_format[0].mbus_code; |
| } |
| |
| static int gb_camera_op_configure_streams(void *priv, unsigned int *nstreams, |
| unsigned int *flags, struct gb_camera_stream *streams) |
| { |
| 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 = kzalloc(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); |
| 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) |
| { |
| return gb_camera_capture(priv, request_id, streams, num_frames, |
| settings_size, settings); |
| } |
| |
| static int gb_camera_op_flush(void *priv, u32 *request_id) |
| { |
| return gb_camera_flush(priv, request_id); |
| } |
| |
| struct gb_camera_ops gb_cam_ops = { |
| .configure_streams = gb_camera_op_configure_streams, |
| .capture = gb_camera_op_capture, |
| .flush = gb_camera_op_flush, |
| }; |
| |
| static int gb_camera_register_intf_ops(struct gb_camera *gcam) |
| { |
| return gb_camera_register(&gb_cam_ops, gcam); |
| } |
| |
| /* ----------------------------------------------------------------------------- |
| * DebugFS |
| */ |
| static ssize_t gb_camera_debugfs_capabilities(struct gb_camera *gcam, |
| char *buf, size_t len) |
| { |
| return len; |
| } |
| |
| 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 == NULL) |
| 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 == NULL) |
| return -EINVAL; |
| |
| ret = kstrtouint(token, 10, &flags); |
| if (ret < 0) |
| return ret; |
| |
| /* For each stream to configure parse width, height and format */ |
| streams = kzalloc(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 == NULL) { |
| ret = -EINVAL; |
| goto done; |
| } |
| ret = kstrtouint(token, 10, &stream->width); |
| if (ret < 0) |
| goto done; |
| |
| /* height */ |
| token = strsep(&buf, ";"); |
| if (token == NULL) |
| goto done; |
| |
| ret = kstrtouint(token, 10, &stream->height); |
| if (ret < 0) |
| goto done; |
| |
| /* Image format code */ |
| token = strsep(&buf, ";"); |
| if (token == NULL) |
| goto done; |
| |
| ret = kstrtouint(token, 16, &stream->format); |
| if (ret < 0) |
| goto done; |
| } |
| |
| ret = gb_camera_configure_streams(gcam, &nstreams, &flags, streams); |
| 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 == NULL) |
| return -EINVAL; |
| ret = kstrtouint(token, 10, &request_id); |
| if (ret < 0) |
| return ret; |
| |
| /* Stream mask */ |
| token = strsep(&buf, ";"); |
| if (token == NULL) |
| return -EINVAL; |
| ret = kstrtouint(token, 16, &streams_mask); |
| if (ret < 0) |
| return ret; |
| |
| /* number of frames */ |
| token = strsep(&buf, ";"); |
| if (token == NULL) |
| 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 | S_IRUGO, |
| .buffer = GB_CAMERA_DEBUGFS_BUFFER_CAPABILITIES, |
| .execute = gb_camera_debugfs_capabilities, |
| }, { |
| .name = "configure_streams", |
| .mask = S_IFREG | S_IRUGO | S_IWUGO, |
| .buffer = GB_CAMERA_DEBUGFS_BUFFER_STREAMS, |
| .execute = gb_camera_debugfs_configure_streams, |
| }, { |
| .name = "capture", |
| .mask = S_IFREG | S_IRUGO | S_IWUGO, |
| .buffer = GB_CAMERA_DEBUGFS_BUFFER_CAPTURE, |
| .execute = gb_camera_debugfs_capture, |
| }, { |
| .name = "flush", |
| .mask = S_IFREG | S_IRUGO | S_IWUGO, |
| .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->f_inode->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 & S_IWUGO)) { |
| 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->f_inode->i_private; |
| ssize_t ret; |
| char *kbuf; |
| |
| if (len > 1024) |
| return -EINVAL; |
| |
| kbuf = kmalloc(len + 1, GFP_KERNEL); |
| if (kbuf == NULL) |
| 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, |
| connection->bundle->id); |
| |
| gcam->debugfs.root = debugfs_create_dir(dirname, gb_debugfs_get()); |
| if (IS_ERR(gcam->debugfs.root)) { |
| gcam_err(gcam, "debugfs root create failed (%ld)\n", |
| PTR_ERR(gcam->debugfs.root)); |
| return PTR_ERR(gcam->debugfs.root); |
| } |
| |
| gcam->debugfs.buffers = vmalloc(sizeof(*gcam->debugfs.buffers) * |
| GB_CAMERA_DEBUGFS_BUFFER_MAX); |
| 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]; |
| struct dentry *dentry; |
| |
| gcam->debugfs.buffers[i].length = 0; |
| |
| dentry = debugfs_create_file(entry->name, entry->mask, |
| gcam->debugfs.root, gcam, |
| &gb_camera_debugfs_ops); |
| if (IS_ERR(dentry)) { |
| gcam_err(gcam, |
| "debugfs operation %s create failed (%ld)\n", |
| entry->name, PTR_ERR(gcam->debugfs.root)); |
| return PTR_ERR(dentry); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void gb_camera_debugfs_cleanup(struct gb_camera *gcam) |
| { |
| if (gcam->debugfs.root) |
| 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); |
| |
| if (gcam->data_connected) { |
| struct gb_interface *intf = gcam->connection->intf; |
| struct gb_svc *svc = gcam->connection->hd->svc; |
| |
| gb_svc_connection_destroy(svc, intf->interface_id, |
| ES2_APB_CDSI0_CPORT, svc->ap_intf_id, |
| ES2_APB_CDSI1_CPORT); |
| } |
| |
| kfree(gcam); |
| } |
| |
| static int gb_camera_connection_init(struct gb_connection *connection) |
| { |
| struct gb_svc *svc = connection->hd->svc; |
| struct gb_camera *gcam; |
| int ret; |
| |
| gcam = kzalloc(sizeof(*gcam), GFP_KERNEL); |
| if (!gcam) |
| return -ENOMEM; |
| |
| gcam->connection = connection; |
| connection->private = gcam; |
| |
| /* |
| * Create the data connection between camera module CDSI0 and APB CDS1. |
| * The CPort IDs are hardcoded by the ES2 bridges. |
| */ |
| ret = gb_svc_connection_create(svc, connection->intf->interface_id, |
| ES2_APB_CDSI0_CPORT, svc->ap_intf_id, |
| ES2_APB_CDSI1_CPORT, false); |
| if (ret < 0) |
| goto error; |
| |
| gcam->data_connected = true; |
| |
| ret = gb_camera_debugfs_init(gcam); |
| if (ret < 0) |
| goto error; |
| |
| ret = gb_camera_register_intf_ops(gcam); |
| if (ret < 0) |
| goto error; |
| |
| return 0; |
| |
| error: |
| gb_camera_cleanup(gcam); |
| return ret; |
| } |
| |
| static void gb_camera_connection_exit(struct gb_connection *connection) |
| { |
| struct gb_camera *gcam = connection->private; |
| |
| gb_camera_cleanup(gcam); |
| } |
| |
| static struct gb_protocol camera_protocol = { |
| .name = "camera", |
| .id = GREYBUS_PROTOCOL_CAMERA_MGMT, |
| .major = GB_CAMERA_VERSION_MAJOR, |
| .minor = GB_CAMERA_VERSION_MINOR, |
| .connection_init = gb_camera_connection_init, |
| .connection_exit = gb_camera_connection_exit, |
| .request_recv = gb_camera_event_recv, |
| }; |
| |
| gb_protocol_driver(&camera_protocol); |
| |
| MODULE_LICENSE("GPL v2"); |