| /* Copyright (c) 2017, The Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| |
| #include "cam_debug_util.h" |
| #include "cam_fd_context.h" |
| |
| /* Functions in Available state */ |
| static int __cam_fd_ctx_acquire_dev_in_available(struct cam_context *ctx, |
| struct cam_acquire_dev_cmd *cmd) |
| { |
| int rc; |
| |
| rc = cam_context_acquire_dev_to_hw(ctx, cmd); |
| if (rc) { |
| CAM_ERR(CAM_FD, "Failed in Acquire dev, rc=%d", rc); |
| return rc; |
| } |
| |
| ctx->state = CAM_CTX_ACQUIRED; |
| |
| return rc; |
| } |
| |
| /* Functions in Acquired state */ |
| static int __cam_fd_ctx_release_dev_in_acquired(struct cam_context *ctx, |
| struct cam_release_dev_cmd *cmd) |
| { |
| int rc; |
| |
| rc = cam_context_release_dev_to_hw(ctx, cmd); |
| if (rc) { |
| CAM_ERR(CAM_FD, "Failed in Release dev, rc=%d", rc); |
| return rc; |
| } |
| |
| ctx->state = CAM_CTX_AVAILABLE; |
| |
| return rc; |
| } |
| |
| static int __cam_fd_ctx_config_dev_in_acquired(struct cam_context *ctx, |
| struct cam_config_dev_cmd *cmd) |
| { |
| int rc; |
| |
| rc = cam_context_prepare_dev_to_hw(ctx, cmd); |
| if (rc) { |
| CAM_ERR(CAM_FD, "Failed in Prepare dev, rc=%d", rc); |
| return rc; |
| } |
| |
| return rc; |
| } |
| |
| static int __cam_fd_ctx_start_dev_in_acquired(struct cam_context *ctx, |
| struct cam_start_stop_dev_cmd *cmd) |
| { |
| int rc; |
| |
| rc = cam_context_start_dev_to_hw(ctx, cmd); |
| if (rc) { |
| CAM_ERR(CAM_FD, "Failed in Start dev, rc=%d", rc); |
| return rc; |
| } |
| |
| ctx->state = CAM_CTX_ACTIVATED; |
| |
| return rc; |
| } |
| |
| /* Functions in Activated state */ |
| static int __cam_fd_ctx_stop_dev_in_activated(struct cam_context *ctx, |
| struct cam_start_stop_dev_cmd *cmd) |
| { |
| int rc; |
| |
| rc = cam_context_stop_dev_to_hw(ctx); |
| if (rc) { |
| CAM_ERR(CAM_FD, "Failed in Stop dev, rc=%d", rc); |
| return rc; |
| } |
| |
| ctx->state = CAM_CTX_ACQUIRED; |
| |
| return rc; |
| } |
| |
| static int __cam_fd_ctx_release_dev_in_activated(struct cam_context *ctx, |
| struct cam_release_dev_cmd *cmd) |
| { |
| int rc; |
| |
| rc = __cam_fd_ctx_stop_dev_in_activated(ctx, NULL); |
| if (rc) { |
| CAM_ERR(CAM_FD, "Failed in Stop dev, rc=%d", rc); |
| return rc; |
| } |
| |
| rc = __cam_fd_ctx_release_dev_in_acquired(ctx, cmd); |
| if (rc) { |
| CAM_ERR(CAM_FD, "Failed in Release dev, rc=%d", rc); |
| return rc; |
| } |
| |
| return rc; |
| } |
| |
| static int __cam_fd_ctx_config_dev_in_activated( |
| struct cam_context *ctx, struct cam_config_dev_cmd *cmd) |
| { |
| int rc; |
| |
| rc = cam_context_prepare_dev_to_hw(ctx, cmd); |
| if (rc) { |
| CAM_ERR(CAM_FD, "Failed in Prepare dev, rc=%d", rc); |
| return rc; |
| } |
| |
| return rc; |
| } |
| |
| static int __cam_fd_ctx_handle_irq_in_activated(void *context, |
| uint32_t evt_id, void *evt_data) |
| { |
| int rc; |
| |
| rc = cam_context_buf_done_from_hw(context, evt_data, evt_id); |
| if (rc) { |
| CAM_ERR(CAM_FD, "Failed in buf done, rc=%d", rc); |
| return rc; |
| } |
| |
| return rc; |
| } |
| |
| /* top state machine */ |
| static struct cam_ctx_ops |
| cam_fd_ctx_state_machine[CAM_CTX_STATE_MAX] = { |
| /* Uninit */ |
| { |
| .ioctl_ops = {}, |
| .crm_ops = {}, |
| .irq_ops = NULL, |
| }, |
| /* Available */ |
| { |
| .ioctl_ops = { |
| .acquire_dev = __cam_fd_ctx_acquire_dev_in_available, |
| }, |
| .crm_ops = {}, |
| .irq_ops = NULL, |
| }, |
| /* Acquired */ |
| { |
| .ioctl_ops = { |
| .release_dev = __cam_fd_ctx_release_dev_in_acquired, |
| .config_dev = __cam_fd_ctx_config_dev_in_acquired, |
| .start_dev = __cam_fd_ctx_start_dev_in_acquired, |
| }, |
| .crm_ops = {}, |
| .irq_ops = NULL, |
| }, |
| /* Ready */ |
| { |
| .ioctl_ops = { }, |
| .crm_ops = {}, |
| .irq_ops = NULL, |
| }, |
| /* Activated */ |
| { |
| .ioctl_ops = { |
| .stop_dev = __cam_fd_ctx_stop_dev_in_activated, |
| .release_dev = __cam_fd_ctx_release_dev_in_activated, |
| .config_dev = __cam_fd_ctx_config_dev_in_activated, |
| }, |
| .crm_ops = {}, |
| .irq_ops = __cam_fd_ctx_handle_irq_in_activated, |
| }, |
| }; |
| |
| |
| int cam_fd_context_init(struct cam_fd_context *fd_ctx, |
| struct cam_context *base_ctx, struct cam_hw_mgr_intf *hw_intf) |
| { |
| int rc; |
| |
| if (!base_ctx || !fd_ctx) { |
| CAM_ERR(CAM_FD, "Invalid Context %pK %pK", base_ctx, fd_ctx); |
| return -EINVAL; |
| } |
| |
| memset(fd_ctx, 0, sizeof(*fd_ctx)); |
| |
| rc = cam_context_init(base_ctx, NULL, hw_intf, fd_ctx->req_base, |
| CAM_CTX_REQ_MAX); |
| if (rc) { |
| CAM_ERR(CAM_FD, "Camera Context Base init failed, rc=%d", rc); |
| return rc; |
| } |
| |
| fd_ctx->base = base_ctx; |
| base_ctx->ctx_priv = fd_ctx; |
| base_ctx->state_machine = cam_fd_ctx_state_machine; |
| |
| return rc; |
| } |
| |
| int cam_fd_context_deinit(struct cam_fd_context *fd_ctx) |
| { |
| int rc = 0; |
| |
| if (!fd_ctx || !fd_ctx->base) { |
| CAM_ERR(CAM_FD, "Invalid inputs %pK", fd_ctx); |
| return -EINVAL; |
| } |
| |
| rc = cam_context_deinit(fd_ctx->base); |
| if (rc) |
| CAM_ERR(CAM_FD, "Error in base deinit, rc=%d", rc); |
| |
| memset(fd_ctx, 0, sizeof(*fd_ctx)); |
| |
| return rc; |
| } |