maxim_codec.c 2.0 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687
  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * maxim_codec.c -- MAXIM CODEC Common driver
  4. *
  5. * Copyright 2011 Maxim Integrated Products
  6. */
  7. #include <common.h>
  8. #include <div64.h>
  9. #include <i2c.h>
  10. #include <i2s.h>
  11. #include <sound.h>
  12. #include <asm/gpio.h>
  13. #include <asm/io.h>
  14. #include <asm/arch/clk.h>
  15. #include <asm/arch/cpu.h>
  16. #include <asm/arch/power.h>
  17. #include "maxim_codec.h"
  18. /*
  19. * Writes value to a device register through i2c
  20. *
  21. * @param priv Private data for driver
  22. * @param reg reg number to be write
  23. * @param data data to be writen to the above registor
  24. *
  25. * @return int value 1 for change, 0 for no change or negative error code.
  26. */
  27. int maxim_i2c_write(struct maxim_priv *priv, unsigned int reg,
  28. unsigned char data)
  29. {
  30. debug("%s: Write Addr : 0x%02X, Data : 0x%02X\n",
  31. __func__, reg, data);
  32. return dm_i2c_write(priv->dev, reg, &data, 1);
  33. }
  34. /*
  35. * Read a value from a device register through i2c
  36. *
  37. * @param priv Private data for driver
  38. * @param reg reg number to be read
  39. * @param data address of read data to be stored
  40. *
  41. * @return int value 0 for success, -1 in case of error.
  42. */
  43. unsigned int maxim_i2c_read(struct maxim_priv *priv, unsigned int reg,
  44. unsigned char *data)
  45. {
  46. int ret;
  47. return dm_i2c_read(priv->dev, reg, data, 1);
  48. if (ret != 0) {
  49. debug("%s: Error while reading register %#04x\n",
  50. __func__, reg);
  51. return -1;
  52. }
  53. return 0;
  54. }
  55. /*
  56. * update device register bits through i2c
  57. *
  58. * @param priv Private data for driver
  59. * @param reg codec register
  60. * @param mask register mask
  61. * @param value new value
  62. *
  63. * @return int value 0 for success, non-zero error code.
  64. */
  65. int maxim_bic_or(struct maxim_priv *priv, unsigned int reg, unsigned char mask,
  66. unsigned char value)
  67. {
  68. int change, ret = 0;
  69. unsigned char old, new;
  70. if (maxim_i2c_read(priv, reg, &old) != 0)
  71. return -1;
  72. new = (old & ~mask) | (value & mask);
  73. change = (old != new) ? 1 : 0;
  74. if (change)
  75. ret = maxim_i2c_write(priv, reg, new);
  76. if (ret < 0)
  77. return ret;
  78. return change;
  79. }