vdec-starfive.h 5.3 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Copyright (C) 2021 StarFive Technology Co., Ltd.
  4. */
  5. #ifndef __VDEC_STARFIVE_H__
  6. #define __VDEC_STARFIVE_H__
  7. #include <linux/io.h>
  8. #include <linux/clk.h>
  9. #include <linux/platform_device.h>
  10. #include <linux/reset.h>
  11. #include <linux/reset-controller.h>
  12. #include <linux/module.h>
  13. #include <linux/delay.h>
  14. #include <linux/clk-provider.h>
  15. #define VDEC_ID_NUM 5
  16. struct starfive_vdec_data {
  17. struct device *dev;
  18. struct clk *clk_vdec_axi;
  19. struct clk *clk_vdecbrg_main;
  20. struct clk *clk_vdec_bclk;
  21. struct clk *clk_vdec_cclk;
  22. struct clk *clk_vdec_apb;
  23. struct reset_control *rst_vdecbrg_main;
  24. struct reset_control *rst_vdec_axi;
  25. struct reset_control *rst_vdec_bclk;
  26. struct reset_control *rst_vdec_cclk;
  27. struct reset_control *rst_vdec_apb;
  28. struct clk *clk_vdec_id[VDEC_ID_NUM];
  29. struct reset_control *rst_vdec_id[VDEC_ID_NUM];
  30. };
  31. static struct starfive_vdec_data *sf_vdec = NULL;
  32. const char vdec_data_id[VDEC_ID_NUM][15] = {
  33. "vdec_axi",
  34. "vdecbrg_main",
  35. "vdec_bclk",
  36. "vdec_cclk",
  37. "vdec_apb",
  38. };
  39. void starfive_vdec_rst_status(void)
  40. {
  41. int i;
  42. int rst_state;
  43. for (i = 0; i < VDEC_ID_NUM; i++) {
  44. rst_state = reset_control_status(sf_vdec->rst_vdec_id[i]);
  45. }
  46. return;
  47. }
  48. void starfive_vdec_clk_status(void)
  49. {
  50. int i;
  51. int clk_state;
  52. for (i = 0; i < VDEC_ID_NUM; i++) {
  53. clk_state = __clk_is_enabled(sf_vdec->clk_vdec_id[i]);
  54. }
  55. return;
  56. }
  57. void starfive_vdec_rst_exit(void)
  58. {
  59. int i;
  60. int ret;
  61. for (i = 0; i < VDEC_ID_NUM; i++) {
  62. ret = reset_control_assert(sf_vdec->rst_vdec_id[i]);
  63. if (ret) {
  64. dev_err(sf_vdec->dev, "reset assert failed\n");
  65. }
  66. }
  67. return;
  68. }
  69. void starfive_vdec_clk_exit(void)
  70. {
  71. int i;
  72. for (i = 0; i < VDEC_ID_NUM; i++) {
  73. clk_disable_unprepare(sf_vdec->clk_vdec_id[i]);
  74. }
  75. return;
  76. }
  77. static int starfive_vdec_clk_init(void)
  78. {
  79. int ret = 0;
  80. int i;
  81. for (i = 0; i < VDEC_ID_NUM; i++) {
  82. ret = clk_prepare_enable(sf_vdec->clk_vdec_id[i]);
  83. if (ret) {
  84. dev_err(sf_vdec->dev, vdec_data_id[i]);
  85. goto init_clk_failed;
  86. }
  87. }
  88. return 0;
  89. init_clk_failed:
  90. for(; i > 0 ; i--) {
  91. clk_disable_unprepare(sf_vdec->clk_vdec_id[i-1]);
  92. }
  93. return ret;
  94. }
  95. static int starfive_vdec_get_clk(void)
  96. {
  97. int ret = 0;
  98. int i;
  99. for ( i = 0; i < VDEC_ID_NUM ; i++) {
  100. sf_vdec->clk_vdec_id[i] = devm_clk_get(sf_vdec->dev, vdec_data_id[i]);
  101. if (IS_ERR(sf_vdec->clk_vdec_id[i])) {
  102. dev_err(sf_vdec->dev, vdec_data_id[i]);
  103. ret = PTR_ERR(sf_vdec->clk_vdec_id[i]);
  104. goto get_clk_failed;
  105. }
  106. }
  107. return 0;
  108. get_clk_failed:
  109. for( ; i > 0 ; i--) {
  110. devm_clk_put(sf_vdec->dev, sf_vdec->clk_vdec_id[i-1]);
  111. }
  112. return ret;
  113. }
  114. static int starfive_vdec_reset_init(void)
  115. {
  116. int ret = 0;
  117. int i;
  118. for (i = 0; i < VDEC_ID_NUM ; i++) {
  119. ret = reset_control_deassert(sf_vdec->rst_vdec_id[i]);
  120. if (ret) {
  121. dev_err(sf_vdec->dev, vdec_data_id[i]);
  122. goto init_reset_failed;
  123. }
  124. }
  125. return 0;
  126. init_reset_failed:
  127. for (; i > 0 ; i--) {
  128. reset_control_assert(sf_vdec->rst_vdec_id[i-1]);
  129. }
  130. return ret;
  131. }
  132. static int starfive_vdec_get_resets(void)
  133. {
  134. int ret = 0;
  135. int i;
  136. for (i = 0; i < VDEC_ID_NUM ; i++) {
  137. sf_vdec->rst_vdec_id[i] = devm_reset_control_get_exclusive(sf_vdec->dev, vdec_data_id[i]);
  138. if (IS_ERR(sf_vdec->rst_vdec_id[i])) {
  139. dev_err(sf_vdec->dev, vdec_data_id[i]);
  140. ret = PTR_ERR(sf_vdec->rst_vdec_id[i]);
  141. goto get_resets_failed;
  142. }
  143. }
  144. return 0;
  145. get_resets_failed:
  146. for (; i > 0; i--) {
  147. reset_control_put(sf_vdec->rst_vdec_id[i-1]);
  148. }
  149. return ret;
  150. }
  151. int starfive_vdec_data_init(struct device *dev)
  152. {
  153. int ret = 0;
  154. if (sf_vdec == NULL){
  155. sf_vdec = devm_kzalloc(dev, sizeof(*sf_vdec), GFP_KERNEL);
  156. if (!sf_vdec)
  157. return -ENOMEM;
  158. sf_vdec->dev = dev;
  159. ret = starfive_vdec_get_clk();
  160. if (ret) {
  161. dev_err(sf_vdec->dev, "failed to get vdec clock\n");
  162. return ret;
  163. }
  164. ret = starfive_vdec_get_resets();
  165. if (ret) {
  166. dev_err(sf_vdec->dev, "failed to get vdec resets\n");
  167. return ret;
  168. }
  169. }
  170. return 0;
  171. }
  172. int starfive_vdec_clk_enable(struct device *dev)
  173. {
  174. int ret = 0;
  175. ret = starfive_vdec_data_init(dev);
  176. if (ret)
  177. return ret;
  178. ret = starfive_vdec_clk_init();
  179. if (ret) {
  180. dev_err(sf_vdec->dev, "failed to enable vdec clock\n");
  181. return ret;
  182. }
  183. return 0;
  184. }
  185. int starfive_vdec_clk_disable(struct device *dev)
  186. {
  187. int ret = 0;
  188. ret = starfive_vdec_data_init(dev);
  189. if (ret)
  190. return ret;
  191. starfive_vdec_clk_exit();
  192. return 0;
  193. }
  194. int starfive_vdec_rst_deassert(struct device *dev)
  195. {
  196. int ret = 0;
  197. ret = starfive_vdec_data_init(dev);
  198. if (ret)
  199. return ret;
  200. ret = starfive_vdec_reset_init();
  201. if (ret) {
  202. dev_err(sf_vdec->dev, "failed to deassert vdec resets\n");
  203. return ret;
  204. }
  205. return 0;
  206. }
  207. int starfive_vdec_rst_assert(struct device *dev)
  208. {
  209. int ret = 0;
  210. ret = starfive_vdec_data_init(dev);
  211. if (ret)
  212. return ret;
  213. starfive_vdec_rst_exit();
  214. return 0;
  215. }
  216. int starfive_vdec_clk_rst_init(struct platform_device *pdev)
  217. {
  218. int ret = 0;
  219. ret = starfive_vdec_data_init(&pdev->dev);
  220. if (ret)
  221. return ret;
  222. ret = starfive_vdec_clk_init();
  223. if (ret) {
  224. dev_err(sf_vdec->dev, "failed to enable vdec clock\n");
  225. return ret;
  226. }
  227. starfive_vdec_rst_exit();
  228. mdelay(1);
  229. ret = starfive_vdec_reset_init();
  230. if (ret) {
  231. dev_err(sf_vdec->dev, "failed to set vdec reset\n");
  232. goto init_failed;
  233. }
  234. printk("starfive vdec clock & reset init success.");
  235. return 0;
  236. init_failed:
  237. starfive_vdec_clk_exit();
  238. return ret;
  239. }
  240. #endif