vi_pre_driver_of.c 9.5 KB

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  1. /*
  2. * Copyright (C) 2021 Alibaba Group Holding Limited
  3. * Author: Shenwuyi <shenwuyi.swy@alibaba-inc.com>
  4. *
  5. * This program is free software; you can redistribute it and/or modify
  6. * it under the terms of the GNU General Public License version 2 as
  7. * published by the Free Software Foundation.
  8. */
  9. #include <linux/poll.h>
  10. #include <linux/pm_runtime.h>
  11. #include "vi_pre.h"
  12. #include "vi_pre_ioctl.h"
  13. static unsigned int vi_pre_major = 0;
  14. static unsigned int vi_pre_minor = 0;
  15. struct class *vi_pre_class;
  16. static unsigned int device_register_index = 0;
  17. static int vipre_runtime_suspend(struct device *dev)
  18. {
  19. struct vi_pre_dev *pdriver_dev = dev_get_drvdata(dev);
  20. pr_info("enter %s\n", __func__);
  21. if (pdriver_dev->aclk!= NULL) {
  22. clk_disable_unprepare(pdriver_dev->aclk);
  23. }
  24. if (pdriver_dev->pclk != NULL) {
  25. clk_disable_unprepare(pdriver_dev->pclk);
  26. }
  27. if (pdriver_dev->pixclk!= NULL) {
  28. clk_disable_unprepare(pdriver_dev->pixclk);
  29. }
  30. pr_info("exit %s\n", __func__);
  31. return 0;
  32. }
  33. static int vipre_runtime_resume(struct device *dev)
  34. {
  35. int ret = 0;
  36. struct vi_pre_dev *pdriver_dev = dev_get_drvdata(dev);
  37. if (pdriver_dev->pclk != NULL) {
  38. ret = clk_prepare_enable(pdriver_dev->pclk);
  39. if (ret < 0) {
  40. dev_err(dev, "could not prepare or enable csi pclk\n");
  41. clk_disable_unprepare(pdriver_dev->pclk);
  42. }
  43. }
  44. if (pdriver_dev->pixclk!= NULL) {
  45. ret = clk_prepare_enable(pdriver_dev->pixclk);
  46. if (ret < 0) {
  47. dev_err(dev, "could not prepare or enable pixclk\n");
  48. clk_disable_unprepare(pdriver_dev->pixclk);
  49. }
  50. }
  51. if (pdriver_dev->aclk!= NULL) {
  52. ret = clk_prepare_enable(pdriver_dev->aclk);
  53. if (ret < 0) {
  54. dev_err(dev, "could not prepare or enable aclk\n");
  55. clk_disable_unprepare(pdriver_dev->aclk);
  56. }
  57. }
  58. pr_info("%s Enabled clock\n", __func__);
  59. return ret;
  60. }
  61. static const struct dev_pm_ops vipre_runtime_pm_ops = {
  62. SET_RUNTIME_PM_OPS(vipre_runtime_suspend, vipre_runtime_resume, NULL)
  63. };
  64. static int vi_pre_open(struct inode * inode, struct file * file)
  65. {
  66. int ret = 0;
  67. struct vi_pre_dev *pdriver_dev;
  68. struct device *dev;
  69. pr_info("entry %s\n", __func__);
  70. pdriver_dev = container_of(inode->i_cdev, struct vi_pre_dev, cdev);
  71. file->private_data = pdriver_dev;
  72. dev = &pdriver_dev->pdev->dev;
  73. if (pm_runtime_get_sync(dev)) {
  74. ret = vipre_runtime_resume(dev);
  75. if (ret)
  76. pr_err("fail to resume csi %s %d\n", __func__, __LINE__);
  77. }
  78. pr_info("exit %s\n", __func__);
  79. return 0;
  80. };
  81. static long vi_pre_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
  82. {
  83. long ret = 0;
  84. struct vi_pre_dev *pdriver_dev;
  85. pr_debug("enter %s\n", __func__);
  86. //printk("%s, %d, vipre_cmd %u\n", __func__, __LINE__, cmd);
  87. pdriver_dev = file->private_data;
  88. if (pdriver_dev == NULL) {
  89. pr_err("%s:file private is null point error\n", __func__);
  90. return -ENOMEM;
  91. }
  92. mutex_lock(&pdriver_dev->mutex);
  93. ret = vi_pre_priv_ioctl(pdriver_dev, cmd ,(void *)arg);
  94. mutex_unlock(&pdriver_dev->mutex);
  95. pr_debug("exit %s\n", __func__);
  96. return ret;
  97. };
  98. static int vi_pre_release(struct inode * inode, struct file * file)
  99. {
  100. int ret = 0;
  101. struct vi_pre_dev *pdriver_dev;
  102. struct device *dev;
  103. pr_info("enter %s\n", __func__);
  104. pdriver_dev = container_of(inode->i_cdev, struct vi_pre_dev, cdev);
  105. file->private_data = pdriver_dev;
  106. dev = &pdriver_dev->pdev->dev;
  107. ret = pm_runtime_put_sync(dev);
  108. if (ret) {
  109. pr_info("fail to resume vipre %s %d\n", __func__, __LINE__);
  110. }
  111. pr_info("exit %s\n", __func__);
  112. return 0;
  113. };
  114. static int vi_pre_mmap(struct file *pFile, struct vm_area_struct *vma)
  115. {
  116. #define img_buf 0xf0000000
  117. pr_info("enter %s\n", __func__);
  118. vma->vm_flags |= VM_IO;
  119. vma->vm_flags |= (VM_DONTEXPAND | VM_DONTDUMP);
  120. if(remap_pfn_range(vma,
  121. vma->vm_start,
  122. img_buf >> PAGE_SHIFT,
  123. vma->vm_end - vma->vm_start,
  124. vma->vm_page_prot)) {
  125. return -EAGAIN;
  126. }
  127. pr_info("exit %s\n", __func__);
  128. return 0;
  129. };
  130. extern unsigned vi_pre_poll(struct file *file, poll_table *wait);
  131. struct file_operations vi_pre_fops = {
  132. .owner = THIS_MODULE,
  133. .open = vi_pre_open,
  134. .release = vi_pre_release,
  135. .unlocked_ioctl = vi_pre_ioctl,
  136. .mmap = vi_pre_mmap,
  137. .poll = vi_pre_poll,
  138. };
  139. static int vi_pre_probe(struct platform_device *pdev)
  140. {
  141. int ret = 0;
  142. struct vi_pre_dev *pdriver_dev;
  143. struct resource *mem;
  144. struct device *dev = NULL;
  145. pr_info("enter %s\n", __func__);
  146. dev = &pdev->dev;
  147. pdev->id = device_register_index;
  148. if (pdev->id >= VI_PRE_MAXCNT) {
  149. pr_err("%s:pdev id is %d error\n", __func__, pdev->id);
  150. return -EINVAL;
  151. }
  152. pdriver_dev = devm_kzalloc(&pdev->dev, sizeof(struct vi_pre_dev), GFP_KERNEL);
  153. if (pdriver_dev == NULL) {
  154. pr_err("%s:alloc struct vi_pre_dev error\n", __func__);
  155. return -ENOMEM;
  156. }
  157. pr_info("%s:isp[%d]: pdriver_dev =0x%px\n", __func__, pdev->id, pdriver_dev);
  158. mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  159. pdriver_dev->reg_base = devm_ioremap_resource(&pdev->dev, mem);
  160. if (IS_ERR(pdriver_dev->reg_base))
  161. return PTR_ERR(pdriver_dev->reg_base);
  162. pr_info("%s:isp[%d]: pdriver_dev->base=0x%px\n", __func__,
  163. pdev->id, pdriver_dev->reg_base);
  164. pdriver_dev->id = pdev->id;
  165. pdriver_dev->pdev = pdev;
  166. mutex_init(&pdriver_dev->mutex);
  167. /*parse clk info from dts*/
  168. pdriver_dev->pclk = devm_clk_get(&pdev->dev, "pclk");
  169. if (IS_ERR(pdriver_dev->pclk)) {
  170. dev_err(&pdev->dev, "failed to get pclk");
  171. pdriver_dev->pclk = NULL;
  172. }
  173. pdriver_dev->pixclk = devm_clk_get(&pdev->dev, "pixclk");
  174. if (IS_ERR(pdriver_dev->pixclk)) {
  175. dev_err(&pdev->dev, "failed to get pixclk");
  176. pdriver_dev->pixclk = NULL;
  177. }
  178. pdriver_dev->aclk = devm_clk_get(&pdev->dev, "aclk");
  179. if (IS_ERR(pdriver_dev->aclk)) {
  180. dev_err(&pdev->dev, "failed to get aclk");
  181. pdriver_dev->aclk = NULL;
  182. }
  183. platform_set_drvdata(pdev, pdriver_dev);
  184. if (device_register_index == 0) {
  185. int ret;
  186. if (vi_pre_major == 0) {
  187. ret = alloc_chrdev_region(&pdriver_dev->devt, 0, VI_PRE_MAXCNT, VI_PRE_NAME);
  188. if (ret != 0) {
  189. pr_err("%s:alloc_chrdev_region error\n", __func__);
  190. return ret;
  191. }
  192. vi_pre_major = MAJOR(pdriver_dev->devt);
  193. vi_pre_minor = MINOR(pdriver_dev->devt);
  194. }
  195. else
  196. {
  197. pdriver_dev->devt = MKDEV(vi_pre_major, vi_pre_minor);
  198. ret = register_chrdev_region(pdriver_dev->devt, VI_PRE_MAXCNT, VI_PRE_NAME);
  199. if (ret) {
  200. pr_err("%s:register_chrdev_region error\n", __func__);
  201. return ret;
  202. }
  203. }
  204. vi_pre_class = class_create(THIS_MODULE, VI_PRE_NAME);
  205. if (IS_ERR(vi_pre_class)) {
  206. pr_err("%s[%d]:class_create error!\n", __func__, __LINE__);
  207. return -EINVAL;
  208. }
  209. }
  210. pdriver_dev->devt = MKDEV(vi_pre_major, vi_pre_minor + pdev->id);
  211. cdev_init(&pdriver_dev->cdev, &vi_pre_fops);
  212. ret = cdev_add(&pdriver_dev->cdev, pdriver_dev->devt, 1);
  213. if ( ret ) {
  214. pr_err("%s[%d]:cdev_add error!\n", __func__, __LINE__);
  215. return ret;
  216. }
  217. pdriver_dev->class = vi_pre_class;
  218. device_create(pdriver_dev->class, NULL, pdriver_dev->devt,
  219. pdriver_dev, "%s%d", VI_PRE_NAME, pdev->id);
  220. pdriver_dev->irq = platform_get_irq(pdev, 0);
  221. if (pdriver_dev->irq < 0) {
  222. dev_err(dev, "vipre get irq error: %d\n", pdriver_dev->id);
  223. ret = pdriver_dev->irq;
  224. goto end;
  225. }
  226. spin_lock_init(&pdriver_dev->slock);
  227. /*
  228. if (device_property_read_bool(dev, "vi_pre_irq_en")) {
  229. ret = devm_request_irq(dev, pdriver_dev->irq,
  230. vi_pre_irq, IRQF_SHARED,
  231. dev_name(dev), pdriver_dev);
  232. if (ret) {
  233. dev_err(dev, "irq vipre failed\n");
  234. goto end;
  235. }
  236. }
  237. */
  238. pm_runtime_enable(&pdev->dev);
  239. ret = vipre_runtime_resume(&pdev->dev);
  240. if (ret < 0) {
  241. dev_err(&pdev->dev, "fail to resume vipre\n");
  242. }
  243. vipre_runtime_suspend(&pdev->dev);
  244. if (ret < 0) {
  245. dev_err(&pdev->dev, "fail to suspend vipre\n");
  246. }
  247. device_register_index++;
  248. pr_info("exit %s:[%d]\n", __func__, pdev->id);
  249. end:
  250. return ret;
  251. }
  252. static int vi_pre_remove(struct platform_device *pdev)
  253. {
  254. struct vi_pre_dev *pdriver_dev;
  255. pr_info("enter %s\n", __func__);
  256. device_register_index--;
  257. pdriver_dev = platform_get_drvdata(pdev);
  258. cdev_del(&pdriver_dev->cdev);
  259. device_destroy(pdriver_dev->class, pdriver_dev->devt);
  260. unregister_chrdev_region(pdriver_dev->devt, VI_PRE_MAXCNT);
  261. if (device_register_index == 0) {
  262. class_destroy(pdriver_dev->class);
  263. }
  264. devm_kfree(&pdev->dev, pdriver_dev);
  265. return 0;
  266. }
  267. static const struct of_device_id vi_pre_of_match_table[] = {
  268. { .compatible = "thead,vi_pre", },
  269. { },
  270. };
  271. static struct platform_driver vi_pre_driver = {
  272. .probe = vi_pre_probe,
  273. .remove = vi_pre_remove,
  274. .driver = {
  275. .owner = THIS_MODULE,
  276. .name = VI_PRE_DEV_NAME,
  277. .of_match_table = vi_pre_of_match_table,
  278. .pm = &vipre_runtime_pm_ops,
  279. },
  280. };
  281. static int __init vi_pre_init_module(void)
  282. {
  283. int ret = 0;
  284. pr_info("enter %s\n", __func__);
  285. ret = platform_driver_register(&vi_pre_driver);
  286. if (ret) {
  287. pr_err("register platform driver failed.\n");
  288. return ret;
  289. }
  290. pr_info("exit %s\n", __func__);
  291. return ret;
  292. }
  293. static void __exit vi_pre_exit_module(void)
  294. {
  295. pr_info("enter %s\n", __func__);
  296. platform_driver_unregister(&vi_pre_driver);
  297. pr_info("exit %s\n", __func__);
  298. }
  299. module_init(vi_pre_init_module);
  300. module_exit(vi_pre_exit_module);
  301. MODULE_DESCRIPTION("VI_PRE");
  302. MODULE_LICENSE("GPL");