cam_fd_dev.c 4.5 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * Copyright (c) 2017-2019, The Linux Foundation. All rights reserved.
  4. */
  5. #include <linux/device.h>
  6. #include <linux/platform_device.h>
  7. #include <linux/slab.h>
  8. #include <linux/module.h>
  9. #include <linux/kernel.h>
  10. #include "cam_subdev.h"
  11. #include "cam_node.h"
  12. #include "cam_fd_context.h"
  13. #include "cam_fd_hw_mgr.h"
  14. #include "cam_fd_hw_mgr_intf.h"
  15. #define CAM_FD_DEV_NAME "cam-fd"
  16. /**
  17. * struct cam_fd_dev - FD device information
  18. *
  19. * @sd: Subdev information
  20. * @base_ctx: List of base contexts
  21. * @fd_ctx: List of FD contexts
  22. * @lock: Mutex handle
  23. * @open_cnt: FD subdev open count
  24. * @probe_done: Whether FD probe is completed
  25. */
  26. struct cam_fd_dev {
  27. struct cam_subdev sd;
  28. struct cam_context base_ctx[CAM_CTX_MAX];
  29. struct cam_fd_context fd_ctx[CAM_CTX_MAX];
  30. struct mutex lock;
  31. uint32_t open_cnt;
  32. bool probe_done;
  33. };
  34. static struct cam_fd_dev g_fd_dev;
  35. static int cam_fd_dev_open(struct v4l2_subdev *sd,
  36. struct v4l2_subdev_fh *fh)
  37. {
  38. struct cam_fd_dev *fd_dev = &g_fd_dev;
  39. if (!fd_dev->probe_done) {
  40. CAM_ERR(CAM_FD, "FD Dev not initialized, fd_dev=%pK", fd_dev);
  41. return -ENODEV;
  42. }
  43. mutex_lock(&fd_dev->lock);
  44. fd_dev->open_cnt++;
  45. CAM_DBG(CAM_FD, "FD Subdev open count %d", fd_dev->open_cnt);
  46. mutex_unlock(&fd_dev->lock);
  47. return 0;
  48. }
  49. static int cam_fd_dev_close(struct v4l2_subdev *sd,
  50. struct v4l2_subdev_fh *fh)
  51. {
  52. struct cam_fd_dev *fd_dev = &g_fd_dev;
  53. struct cam_node *node = v4l2_get_subdevdata(sd);
  54. if (!fd_dev->probe_done) {
  55. CAM_ERR(CAM_FD, "FD Dev not initialized, fd_dev=%pK", fd_dev);
  56. return -ENODEV;
  57. }
  58. mutex_lock(&fd_dev->lock);
  59. fd_dev->open_cnt--;
  60. CAM_DBG(CAM_FD, "FD Subdev open count %d", fd_dev->open_cnt);
  61. mutex_unlock(&fd_dev->lock);
  62. if (!node) {
  63. CAM_ERR(CAM_FD, "Node ptr is NULL");
  64. return -EINVAL;
  65. }
  66. cam_node_shutdown(node);
  67. return 0;
  68. }
  69. static const struct v4l2_subdev_internal_ops cam_fd_subdev_internal_ops = {
  70. .open = cam_fd_dev_open,
  71. .close = cam_fd_dev_close,
  72. };
  73. static int cam_fd_dev_probe(struct platform_device *pdev)
  74. {
  75. int rc;
  76. int i;
  77. struct cam_hw_mgr_intf hw_mgr_intf;
  78. struct cam_node *node;
  79. g_fd_dev.sd.internal_ops = &cam_fd_subdev_internal_ops;
  80. /* Initialize the v4l2 subdevice first. (create cam_node) */
  81. rc = cam_subdev_probe(&g_fd_dev.sd, pdev, CAM_FD_DEV_NAME,
  82. CAM_FD_DEVICE_TYPE);
  83. if (rc) {
  84. CAM_ERR(CAM_FD, "FD cam_subdev_probe failed, rc=%d", rc);
  85. return rc;
  86. }
  87. node = (struct cam_node *) g_fd_dev.sd.token;
  88. rc = cam_fd_hw_mgr_init(pdev->dev.of_node, &hw_mgr_intf);
  89. if (rc) {
  90. CAM_ERR(CAM_FD, "Failed in initializing FD HW manager, rc=%d",
  91. rc);
  92. goto unregister_subdev;
  93. }
  94. for (i = 0; i < CAM_CTX_MAX; i++) {
  95. rc = cam_fd_context_init(&g_fd_dev.fd_ctx[i],
  96. &g_fd_dev.base_ctx[i], &node->hw_mgr_intf, i);
  97. if (rc) {
  98. CAM_ERR(CAM_FD, "FD context init failed i=%d, rc=%d",
  99. i, rc);
  100. goto deinit_ctx;
  101. }
  102. }
  103. rc = cam_node_init(node, &hw_mgr_intf, g_fd_dev.base_ctx, CAM_CTX_MAX,
  104. CAM_FD_DEV_NAME);
  105. if (rc) {
  106. CAM_ERR(CAM_FD, "FD node init failed, rc=%d", rc);
  107. goto deinit_ctx;
  108. }
  109. mutex_init(&g_fd_dev.lock);
  110. g_fd_dev.probe_done = true;
  111. CAM_DBG(CAM_FD, "Camera FD probe complete");
  112. return 0;
  113. deinit_ctx:
  114. for (--i; i >= 0; i--) {
  115. if (cam_fd_context_deinit(&g_fd_dev.fd_ctx[i]))
  116. CAM_ERR(CAM_FD, "FD context %d deinit failed", i);
  117. }
  118. unregister_subdev:
  119. if (cam_subdev_remove(&g_fd_dev.sd))
  120. CAM_ERR(CAM_FD, "Failed in subdev remove");
  121. return rc;
  122. }
  123. static int cam_fd_dev_remove(struct platform_device *pdev)
  124. {
  125. int i, rc;
  126. for (i = 0; i < CAM_CTX_MAX; i++) {
  127. rc = cam_fd_context_deinit(&g_fd_dev.fd_ctx[i]);
  128. if (rc)
  129. CAM_ERR(CAM_FD, "FD context %d deinit failed, rc=%d",
  130. i, rc);
  131. }
  132. rc = cam_fd_hw_mgr_deinit(pdev->dev.of_node);
  133. if (rc)
  134. CAM_ERR(CAM_FD, "Failed in hw mgr deinit, rc=%d", rc);
  135. rc = cam_subdev_remove(&g_fd_dev.sd);
  136. if (rc)
  137. CAM_ERR(CAM_FD, "Unregister failed, rc=%d", rc);
  138. mutex_destroy(&g_fd_dev.lock);
  139. g_fd_dev.probe_done = false;
  140. return rc;
  141. }
  142. static const struct of_device_id cam_fd_dt_match[] = {
  143. {
  144. .compatible = "qcom,cam-fd"
  145. },
  146. {}
  147. };
  148. static struct platform_driver cam_fd_driver = {
  149. .probe = cam_fd_dev_probe,
  150. .remove = cam_fd_dev_remove,
  151. .driver = {
  152. .name = "cam_fd",
  153. .owner = THIS_MODULE,
  154. .of_match_table = cam_fd_dt_match,
  155. .suppress_bind_attrs = true,
  156. },
  157. };
  158. int cam_fd_dev_init_module(void)
  159. {
  160. return platform_driver_register(&cam_fd_driver);
  161. }
  162. void cam_fd_dev_exit_module(void)
  163. {
  164. platform_driver_unregister(&cam_fd_driver);
  165. }
  166. MODULE_DESCRIPTION("MSM FD driver");
  167. MODULE_LICENSE("GPL v2");