fsl_ssi_dbg.c 2.8 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. //
  3. // Freescale SSI ALSA SoC Digital Audio Interface (DAI) debugging functions
  4. //
  5. // Copyright 2014 Markus Pargmann <[email protected]>, Pengutronix
  6. //
  7. // Split from fsl_ssi.c
  8. #include <linux/debugfs.h>
  9. #include <linux/device.h>
  10. #include <linux/kernel.h>
  11. #include "fsl_ssi.h"
  12. void fsl_ssi_dbg_isr(struct fsl_ssi_dbg *dbg, u32 sisr)
  13. {
  14. if (sisr & SSI_SISR_RFRC)
  15. dbg->stats.rfrc++;
  16. if (sisr & SSI_SISR_TFRC)
  17. dbg->stats.tfrc++;
  18. if (sisr & SSI_SISR_CMDAU)
  19. dbg->stats.cmdau++;
  20. if (sisr & SSI_SISR_CMDDU)
  21. dbg->stats.cmddu++;
  22. if (sisr & SSI_SISR_RXT)
  23. dbg->stats.rxt++;
  24. if (sisr & SSI_SISR_RDR1)
  25. dbg->stats.rdr1++;
  26. if (sisr & SSI_SISR_RDR0)
  27. dbg->stats.rdr0++;
  28. if (sisr & SSI_SISR_TDE1)
  29. dbg->stats.tde1++;
  30. if (sisr & SSI_SISR_TDE0)
  31. dbg->stats.tde0++;
  32. if (sisr & SSI_SISR_ROE1)
  33. dbg->stats.roe1++;
  34. if (sisr & SSI_SISR_ROE0)
  35. dbg->stats.roe0++;
  36. if (sisr & SSI_SISR_TUE1)
  37. dbg->stats.tue1++;
  38. if (sisr & SSI_SISR_TUE0)
  39. dbg->stats.tue0++;
  40. if (sisr & SSI_SISR_TFS)
  41. dbg->stats.tfs++;
  42. if (sisr & SSI_SISR_RFS)
  43. dbg->stats.rfs++;
  44. if (sisr & SSI_SISR_TLS)
  45. dbg->stats.tls++;
  46. if (sisr & SSI_SISR_RLS)
  47. dbg->stats.rls++;
  48. if (sisr & SSI_SISR_RFF1)
  49. dbg->stats.rff1++;
  50. if (sisr & SSI_SISR_RFF0)
  51. dbg->stats.rff0++;
  52. if (sisr & SSI_SISR_TFE1)
  53. dbg->stats.tfe1++;
  54. if (sisr & SSI_SISR_TFE0)
  55. dbg->stats.tfe0++;
  56. }
  57. /*
  58. * Show the statistics of a flag only if its interrupt is enabled
  59. *
  60. * Compilers will optimize it to a no-op if the interrupt is disabled
  61. */
  62. #define SIER_SHOW(flag, name) \
  63. do { \
  64. if (SSI_SIER_##flag) \
  65. seq_printf(s, #name "=%u\n", ssi_dbg->stats.name); \
  66. } while (0)
  67. /*
  68. * Display the statistics for the current SSI device
  69. *
  70. * To avoid confusion, only show those counts that are enabled
  71. */
  72. static int fsl_ssi_stats_show(struct seq_file *s, void *unused)
  73. {
  74. struct fsl_ssi_dbg *ssi_dbg = s->private;
  75. SIER_SHOW(RFRC_EN, rfrc);
  76. SIER_SHOW(TFRC_EN, tfrc);
  77. SIER_SHOW(CMDAU_EN, cmdau);
  78. SIER_SHOW(CMDDU_EN, cmddu);
  79. SIER_SHOW(RXT_EN, rxt);
  80. SIER_SHOW(RDR1_EN, rdr1);
  81. SIER_SHOW(RDR0_EN, rdr0);
  82. SIER_SHOW(TDE1_EN, tde1);
  83. SIER_SHOW(TDE0_EN, tde0);
  84. SIER_SHOW(ROE1_EN, roe1);
  85. SIER_SHOW(ROE0_EN, roe0);
  86. SIER_SHOW(TUE1_EN, tue1);
  87. SIER_SHOW(TUE0_EN, tue0);
  88. SIER_SHOW(TFS_EN, tfs);
  89. SIER_SHOW(RFS_EN, rfs);
  90. SIER_SHOW(TLS_EN, tls);
  91. SIER_SHOW(RLS_EN, rls);
  92. SIER_SHOW(RFF1_EN, rff1);
  93. SIER_SHOW(RFF0_EN, rff0);
  94. SIER_SHOW(TFE1_EN, tfe1);
  95. SIER_SHOW(TFE0_EN, tfe0);
  96. return 0;
  97. }
  98. DEFINE_SHOW_ATTRIBUTE(fsl_ssi_stats);
  99. void fsl_ssi_debugfs_create(struct fsl_ssi_dbg *ssi_dbg, struct device *dev)
  100. {
  101. ssi_dbg->dbg_dir = debugfs_create_dir(dev_name(dev), NULL);
  102. debugfs_create_file("stats", 0444, ssi_dbg->dbg_dir, ssi_dbg,
  103. &fsl_ssi_stats_fops);
  104. }
  105. void fsl_ssi_debugfs_remove(struct fsl_ssi_dbg *ssi_dbg)
  106. {
  107. debugfs_remove_recursive(ssi_dbg->dbg_dir);
  108. }