irq-madera.c 7.2 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Interrupt support for Cirrus Logic Madera codecs
  4. *
  5. * Copyright (C) 2015-2018 Cirrus Logic, Inc. and
  6. * Cirrus Logic International Semiconductor Ltd.
  7. */
  8. #include <linux/module.h>
  9. #include <linux/interrupt.h>
  10. #include <linux/irq.h>
  11. #include <linux/irqdomain.h>
  12. #include <linux/pm_runtime.h>
  13. #include <linux/regmap.h>
  14. #include <linux/slab.h>
  15. #include <linux/of.h>
  16. #include <linux/of_device.h>
  17. #include <linux/of_irq.h>
  18. #include <linux/irqchip/irq-madera.h>
  19. #include <linux/mfd/madera/core.h>
  20. #include <linux/mfd/madera/pdata.h>
  21. #include <linux/mfd/madera/registers.h>
  22. #define MADERA_IRQ(_irq, _reg) \
  23. [MADERA_IRQ_ ## _irq] = { \
  24. .reg_offset = (_reg) - MADERA_IRQ1_STATUS_2, \
  25. .mask = MADERA_ ## _irq ## _EINT1 \
  26. }
  27. /* Mappings are the same for all Madera codecs */
  28. static const struct regmap_irq madera_irqs[MADERA_NUM_IRQ] = {
  29. MADERA_IRQ(FLL1_LOCK, MADERA_IRQ1_STATUS_2),
  30. MADERA_IRQ(FLL2_LOCK, MADERA_IRQ1_STATUS_2),
  31. MADERA_IRQ(FLL3_LOCK, MADERA_IRQ1_STATUS_2),
  32. MADERA_IRQ(FLLAO_LOCK, MADERA_IRQ1_STATUS_2),
  33. MADERA_IRQ(MICDET1, MADERA_IRQ1_STATUS_6),
  34. MADERA_IRQ(MICDET2, MADERA_IRQ1_STATUS_6),
  35. MADERA_IRQ(HPDET, MADERA_IRQ1_STATUS_6),
  36. MADERA_IRQ(MICD_CLAMP_RISE, MADERA_IRQ1_STATUS_7),
  37. MADERA_IRQ(MICD_CLAMP_FALL, MADERA_IRQ1_STATUS_7),
  38. MADERA_IRQ(JD1_RISE, MADERA_IRQ1_STATUS_7),
  39. MADERA_IRQ(JD1_FALL, MADERA_IRQ1_STATUS_7),
  40. MADERA_IRQ(ASRC2_IN1_LOCK, MADERA_IRQ1_STATUS_9),
  41. MADERA_IRQ(ASRC2_IN2_LOCK, MADERA_IRQ1_STATUS_9),
  42. MADERA_IRQ(ASRC1_IN1_LOCK, MADERA_IRQ1_STATUS_9),
  43. MADERA_IRQ(ASRC1_IN2_LOCK, MADERA_IRQ1_STATUS_9),
  44. MADERA_IRQ(DRC2_SIG_DET, MADERA_IRQ1_STATUS_9),
  45. MADERA_IRQ(DRC1_SIG_DET, MADERA_IRQ1_STATUS_9),
  46. MADERA_IRQ(DSP_IRQ1, MADERA_IRQ1_STATUS_11),
  47. MADERA_IRQ(DSP_IRQ2, MADERA_IRQ1_STATUS_11),
  48. MADERA_IRQ(DSP_IRQ3, MADERA_IRQ1_STATUS_11),
  49. MADERA_IRQ(DSP_IRQ4, MADERA_IRQ1_STATUS_11),
  50. MADERA_IRQ(DSP_IRQ5, MADERA_IRQ1_STATUS_11),
  51. MADERA_IRQ(DSP_IRQ6, MADERA_IRQ1_STATUS_11),
  52. MADERA_IRQ(DSP_IRQ7, MADERA_IRQ1_STATUS_11),
  53. MADERA_IRQ(DSP_IRQ8, MADERA_IRQ1_STATUS_11),
  54. MADERA_IRQ(DSP_IRQ9, MADERA_IRQ1_STATUS_11),
  55. MADERA_IRQ(DSP_IRQ10, MADERA_IRQ1_STATUS_11),
  56. MADERA_IRQ(DSP_IRQ11, MADERA_IRQ1_STATUS_11),
  57. MADERA_IRQ(DSP_IRQ12, MADERA_IRQ1_STATUS_11),
  58. MADERA_IRQ(DSP_IRQ13, MADERA_IRQ1_STATUS_11),
  59. MADERA_IRQ(DSP_IRQ14, MADERA_IRQ1_STATUS_11),
  60. MADERA_IRQ(DSP_IRQ15, MADERA_IRQ1_STATUS_11),
  61. MADERA_IRQ(DSP_IRQ16, MADERA_IRQ1_STATUS_11),
  62. MADERA_IRQ(HP3R_SC, MADERA_IRQ1_STATUS_12),
  63. MADERA_IRQ(HP3L_SC, MADERA_IRQ1_STATUS_12),
  64. MADERA_IRQ(HP2R_SC, MADERA_IRQ1_STATUS_12),
  65. MADERA_IRQ(HP2L_SC, MADERA_IRQ1_STATUS_12),
  66. MADERA_IRQ(HP1R_SC, MADERA_IRQ1_STATUS_12),
  67. MADERA_IRQ(HP1L_SC, MADERA_IRQ1_STATUS_12),
  68. MADERA_IRQ(SPK_OVERHEAT_WARN, MADERA_IRQ1_STATUS_15),
  69. MADERA_IRQ(SPK_OVERHEAT, MADERA_IRQ1_STATUS_15),
  70. MADERA_IRQ(DSP1_BUS_ERR, MADERA_IRQ1_STATUS_33),
  71. MADERA_IRQ(DSP2_BUS_ERR, MADERA_IRQ1_STATUS_33),
  72. MADERA_IRQ(DSP3_BUS_ERR, MADERA_IRQ1_STATUS_33),
  73. MADERA_IRQ(DSP4_BUS_ERR, MADERA_IRQ1_STATUS_33),
  74. MADERA_IRQ(DSP5_BUS_ERR, MADERA_IRQ1_STATUS_33),
  75. MADERA_IRQ(DSP6_BUS_ERR, MADERA_IRQ1_STATUS_33),
  76. MADERA_IRQ(DSP7_BUS_ERR, MADERA_IRQ1_STATUS_33),
  77. };
  78. static const struct regmap_irq_chip madera_irq_chip = {
  79. .name = "madera IRQ",
  80. .status_base = MADERA_IRQ1_STATUS_2,
  81. .mask_base = MADERA_IRQ1_MASK_2,
  82. .ack_base = MADERA_IRQ1_STATUS_2,
  83. .runtime_pm = true,
  84. .num_regs = 32,
  85. .irqs = madera_irqs,
  86. .num_irqs = ARRAY_SIZE(madera_irqs),
  87. };
  88. #ifdef CONFIG_PM_SLEEP
  89. static int madera_suspend(struct device *dev)
  90. {
  91. struct madera *madera = dev_get_drvdata(dev->parent);
  92. dev_dbg(madera->irq_dev, "Suspend, disabling IRQ\n");
  93. /*
  94. * A runtime resume would be needed to access the chip interrupt
  95. * controller but runtime pm doesn't function during suspend.
  96. * Temporarily disable interrupts until we reach suspend_noirq state.
  97. */
  98. disable_irq(madera->irq);
  99. return 0;
  100. }
  101. static int madera_suspend_noirq(struct device *dev)
  102. {
  103. struct madera *madera = dev_get_drvdata(dev->parent);
  104. dev_dbg(madera->irq_dev, "No IRQ suspend, reenabling IRQ\n");
  105. /* Re-enable interrupts to service wakeup interrupts from the chip */
  106. enable_irq(madera->irq);
  107. return 0;
  108. }
  109. static int madera_resume_noirq(struct device *dev)
  110. {
  111. struct madera *madera = dev_get_drvdata(dev->parent);
  112. dev_dbg(madera->irq_dev, "No IRQ resume, disabling IRQ\n");
  113. /*
  114. * We can't handle interrupts until runtime pm is available again.
  115. * Disable them temporarily.
  116. */
  117. disable_irq(madera->irq);
  118. return 0;
  119. }
  120. static int madera_resume(struct device *dev)
  121. {
  122. struct madera *madera = dev_get_drvdata(dev->parent);
  123. dev_dbg(madera->irq_dev, "Resume, reenabling IRQ\n");
  124. /* Interrupts can now be handled */
  125. enable_irq(madera->irq);
  126. return 0;
  127. }
  128. #endif
  129. static const struct dev_pm_ops madera_irq_pm_ops = {
  130. SET_SYSTEM_SLEEP_PM_OPS(madera_suspend, madera_resume)
  131. SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(madera_suspend_noirq,
  132. madera_resume_noirq)
  133. };
  134. static int madera_irq_probe(struct platform_device *pdev)
  135. {
  136. struct madera *madera = dev_get_drvdata(pdev->dev.parent);
  137. struct irq_data *irq_data;
  138. unsigned int irq_flags = 0;
  139. int ret;
  140. dev_dbg(&pdev->dev, "probe\n");
  141. /*
  142. * Read the flags from the interrupt controller if not specified
  143. * by pdata
  144. */
  145. irq_flags = madera->pdata.irq_flags;
  146. if (!irq_flags) {
  147. irq_data = irq_get_irq_data(madera->irq);
  148. if (!irq_data) {
  149. dev_err(&pdev->dev, "Invalid IRQ: %d\n", madera->irq);
  150. return -EINVAL;
  151. }
  152. irq_flags = irqd_get_trigger_type(irq_data);
  153. /* Codec defaults to trigger low, use this if no flags given */
  154. if (irq_flags == IRQ_TYPE_NONE)
  155. irq_flags = IRQF_TRIGGER_LOW;
  156. }
  157. if (irq_flags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
  158. dev_err(&pdev->dev, "Host interrupt not level-triggered\n");
  159. return -EINVAL;
  160. }
  161. /*
  162. * The silicon always starts at active-low, check if we need to
  163. * switch to active-high.
  164. */
  165. if (irq_flags & IRQF_TRIGGER_HIGH) {
  166. ret = regmap_update_bits(madera->regmap, MADERA_IRQ1_CTRL,
  167. MADERA_IRQ_POL_MASK, 0);
  168. if (ret) {
  169. dev_err(&pdev->dev,
  170. "Failed to set IRQ polarity: %d\n", ret);
  171. return ret;
  172. }
  173. }
  174. /*
  175. * NOTE: regmap registers this against the OF node of the parent of
  176. * the regmap - that is, against the mfd driver
  177. */
  178. ret = regmap_add_irq_chip(madera->regmap, madera->irq, IRQF_ONESHOT, 0,
  179. &madera_irq_chip, &madera->irq_data);
  180. if (ret) {
  181. dev_err(&pdev->dev, "add_irq_chip failed: %d\n", ret);
  182. return ret;
  183. }
  184. /* Save dev in parent MFD struct so it is accessible to siblings */
  185. madera->irq_dev = &pdev->dev;
  186. return 0;
  187. }
  188. static int madera_irq_remove(struct platform_device *pdev)
  189. {
  190. struct madera *madera = dev_get_drvdata(pdev->dev.parent);
  191. /*
  192. * The IRQ is disabled by the parent MFD driver before
  193. * it starts cleaning up all child drivers
  194. */
  195. madera->irq_dev = NULL;
  196. regmap_del_irq_chip(madera->irq, madera->irq_data);
  197. return 0;
  198. }
  199. static struct platform_driver madera_irq_driver = {
  200. .probe = &madera_irq_probe,
  201. .remove = &madera_irq_remove,
  202. .driver = {
  203. .name = "madera-irq",
  204. .pm = &madera_irq_pm_ops,
  205. }
  206. };
  207. module_platform_driver(madera_irq_driver);
  208. MODULE_SOFTDEP("pre: madera");
  209. MODULE_DESCRIPTION("Madera IRQ driver");
  210. MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
  211. MODULE_LICENSE("GPL v2");