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i2c-ibm_iic.h

i2c-ibm_iic.h 2.7 KB
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  1. /*
    2. 

  2.  * drivers/i2c/i2c-ibm_iic.h
    3. 

  3.  *
    4. 

  4.  * Support for the IIC peripheral on IBM PPC 4xx
    5. 

  5.  * 
    6. 

  6.  * Copyright (c) 2003 Zultys Technologies.
    7. 

  7.  * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
    8. 

  8.  *
    9. 

  9.  * Based on original work by 
    10. 

  10.  * 	Ian DaSilva  <idasilva@mvista.com>
    11. 

  11.  *      Armin Kuster <akuster@mvista.com>
    12. 

  12.  * 	Matt Porter  <mporter@mvista.com>
    13. 

  13.  *
    14. 

  14.  *      Copyright 2000-2003 MontaVista Software Inc.
    15. 

  15.  *
    16. 

  16.  * This program is free software; you can redistribute  it and/or modify it
    17. 

  17.  * under  the terms of  the GNU General  Public License as published by the
    18. 

  18.  * Free Software Foundation;  either version 2 of the  License, or (at your
    19. 

  19.  * option) any later version.
    20. 

  20.  *
    21. 

  21.  */
    22. 

  22. #ifndef __I2C_IBM_IIC_H_
    23. 

  23. #define __I2C_IBM_IIC_H_
    24. 

  24. 

  25. #include <linux/config.h>
    26. 

  26. #include <linux/i2c.h> 
    27. 

  27. 

  28. struct iic_regs {
    29. 

  29. 	u16 mdbuf;
    30. 

  30. 	u16 sbbuf;
    31. 

  31. 	u8 lmadr;
    32. 

  32. 	u8 hmadr;
    33. 

  33. 	u8 cntl;
    34. 

  34. 	u8 mdcntl;
    35. 

  35. 	u8 sts;
    36. 

  36. 	u8 extsts;
    37. 

  37. 	u8 lsadr;
    38. 

  38. 	u8 hsadr;
    39. 

  39. 	u8 clkdiv;
    40. 

  40. 	u8 intmsk;
    41. 

  41. 	u8 xfrcnt;
    42. 

  42. 	u8 xtcntlss;
    43. 

  43. 	u8 directcntl;
    44. 

  44. };
    45. 

  45. 

  46. struct ibm_iic_private {
    47. 

  47. 	struct i2c_adapter adap;
    48. 

  48. 	volatile struct iic_regs __iomem *vaddr;
    49. 

  49. 	wait_queue_head_t wq;
    50. 

  50. 	int idx;
    51. 

  51. 	int irq;
    52. 

  52. 	int fast_mode;
    53. 

  53. 	u8  clckdiv;
    54. 

  54. };
    55. 

  55. 

  56. /* IICx_CNTL register */
    57. 

  57. #define CNTL_HMT	0x80
    58. 

  58. #define CNTL_AMD	0x40
    59. 

  59. #define CNTL_TCT_MASK	0x30
    60. 

  60. #define CNTL_TCT_SHIFT	4
    61. 

  61. #define CNTL_RPST	0x08
    62. 

  62. #define CNTL_CHT	0x04 
    63. 

  63. #define CNTL_RW		0x02
    64. 

  64. #define CNTL_PT		0x01
    65. 

  65. 

  66. /* IICx_MDCNTL register */
    67. 

  67. #define MDCNTL_FSDB	0x80
    68. 

  68. #define MDCNTL_FMDB	0x40
    69. 

  69. #define MDCNTL_EGC	0x20
    70. 

  70. #define MDCNTL_FSM	0x10
    71. 

  71. #define MDCNTL_ESM	0x08
    72. 

  72. #define MDCNTL_EINT	0x04
    73. 

  73. #define MDCNTL_EUBS	0x02
    74. 

  74. #define MDCNTL_HSCL	0x01
    75. 

  75. 

  76. /* IICx_STS register */
    77. 

  77. #define STS_SSS		0x80
    78. 

  78. #define STS_SLPR	0x40
    79. 

  79. #define STS_MDBS	0x20
    80. 

  80. #define STS_MDBF	0x10
    81. 

  81. #define STS_SCMP	0x08
    82. 

  82. #define STS_ERR		0x04
    83. 

  83. #define STS_IRQA	0x02
    84. 

  84. #define STS_PT		0x01
    85. 

  85. 

  86. /* IICx_EXTSTS register */
    87. 

  87. #define EXTSTS_IRQP	0x80
    88. 

  88. #define EXTSTS_BCS_MASK	0x70
    89. 

  89. #define   EXTSTS_BCS_FREE  0x40
    90. 

  90. #define EXTSTS_IRQD	0x08
    91. 

  91. #define EXTSTS_LA	0x04
    92. 

  92. #define EXTSTS_ICT	0x02
    93. 

  93. #define EXTSTS_XFRA	0x01
    94. 

  94. 

  95. /* IICx_INTRMSK register */
    96. 

  96. #define INTRMSK_EIRC	0x80
    97. 

  97. #define INTRMSK_EIRS	0x40
    98. 

  98. #define INTRMSK_EIWC	0x20
    99. 

  99. #define INTRMSK_EIWS	0x10
    100. 

  100. #define INTRMSK_EIHE	0x08
    101. 

  101. #define INTRMSK_EIIC	0x04
    102. 

  102. #define INTRMSK_EITA	0x02
    103. 

  103. #define INTRMSK_EIMTC	0x01
    104. 

  104. 

  105. /* IICx_XFRCNT register */
    106. 

  106. #define XFRCNT_MTC_MASK	0x07
    107. 

  107. 

  108. /* IICx_XTCNTLSS register */
    109. 

  109. #define XTCNTLSS_SRC	0x80
    110. 

  110. #define XTCNTLSS_SRS	0x40
    111. 

  111. #define XTCNTLSS_SWC	0x20
    112. 

  112. #define XTCNTLSS_SWS	0x10
    113. 

  113. #define XTCNTLSS_SRST	0x01
    114. 

  114. 

  115. /* IICx_DIRECTCNTL register */
    116. 

  116. #define DIRCNTL_SDAC	0x08
    117. 

  117. #define DIRCNTL_SCC	0x04
    118. 

  118. #define DIRCNTL_MSDA	0x02
    119. 

  119. #define DIRCNTL_MSC	0x01
    120. 

  120. 

  121. /* Check if we really control the I2C bus and bus is free */
    122. 

  122. #define DIRCTNL_FREE(v)	(((v) & 0x0f) == 0x0f)
    123. 

  123. 

  124. #endif /* __I2C_IBM_IIC_H_ */
    125.