Accueil Explorer Aide
Connexion
weimzh
/
amlogic-aml8726-mx-kernel
Suivre 1
Voter 0
Fork 0
Fichiers Tickets 0 Pull Requests 0 Wiki
Aborescence: 16855b5ec0
Branches Tags
amlogic-aml8...
/
drivers
/
video
/
bt455.h

bt455.h 2.0 KB
Historique Raw

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596 
  1. /*
    2. 

  2.  *	linux/drivers/video/bt455.h
    3. 

  3.  *
    4. 

  4.  *	Copyright 2003  Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>
    5. 

  5.  *
    6. 

  6.  *	This file is subject to the terms and conditions of the GNU General
    7. 

  7.  *	Public License. See the file COPYING in the main directory of this
    8. 

  8.  *	archive for more details.
    9. 

  9.  */
    10. 

  10. #include <linux/types.h>
    11. 

  11. #include <asm/system.h>
    12. 

  12. 

  13. /*
    14. 

  14.  * Bt455 byte-wide registers, 32-bit aligned.
    15. 

  15.  */
    16. 

  16. struct bt455_regs {
    17. 

  17. 	volatile u8 addr_cmap;
    18. 

  18. 	u8 pad0[3];
    19. 

  19. 	volatile u8 addr_cmap_data;
    20. 

  20. 	u8 pad1[3];
    21. 

  21. 	volatile u8 addr_clr;
    22. 

  22. 	u8 pad2[3];
    23. 

  23. 	volatile u8 addr_ovly;
    24. 

  24. 	u8 pad3[3];
    25. 

  25. };
    26. 

  26. 

  27. static inline void bt455_select_reg(struct bt455_regs *regs, int ir)
    28. 

  28. {
    29. 

  29. 	mb();
    30. 

  30. 	regs->addr_cmap = ir & 0x0f;
    31. 

  31. }
    32. 

  32. 

  33. /*
    34. 

  34.  * Read/write to a Bt455 color map register.
    35. 

  35.  */
    36. 

  36. static inline void bt455_read_cmap_entry(struct bt455_regs *regs, int cr,
    37. 

  37. 					 u8* red, u8* green, u8* blue)
    38. 

  38. {
    39. 

  39. 	bt455_select_reg(regs, cr);
    40. 

  40. 	mb();
    41. 

  41. 	*red = regs->addr_cmap_data & 0x0f;
    42. 

  42. 	rmb();
    43. 

  43. 	*green = regs->addr_cmap_data & 0x0f;
    44. 

  44. 	rmb();
    45. 

  45. 	*blue = regs->addr_cmap_data & 0x0f;
    46. 

  46. }
    47. 

  47. 

  48. static inline void bt455_write_cmap_entry(struct bt455_regs *regs, int cr,
    49. 

  49. 					  u8 red, u8 green, u8 blue)
    50. 

  50. {
    51. 

  51. 	bt455_select_reg(regs, cr);
    52. 

  52. 	wmb();
    53. 

  53. 	regs->addr_cmap_data = red & 0x0f;
    54. 

  54. 	wmb();
    55. 

  55. 	regs->addr_cmap_data = green & 0x0f;
    56. 

  56. 	wmb();
    57. 

  57. 	regs->addr_cmap_data = blue & 0x0f;
    58. 

  58. }
    59. 

  59. 

  60. static inline void bt455_write_ovly_entry(struct bt455_regs *regs, int cr,
    61. 

  61. 					  u8 red, u8 green, u8 blue)
    62. 

  62. {
    63. 

  63. 	bt455_select_reg(regs, cr);
    64. 

  64. 	wmb();
    65. 

  65. 	regs->addr_ovly = red & 0x0f;
    66. 

  66. 	wmb();
    67. 

  67. 	regs->addr_ovly = green & 0x0f;
    68. 

  68. 	wmb();
    69. 

  69. 	regs->addr_ovly = blue & 0x0f;
    70. 

  70. }
    71. 

  71. 

  72. static inline void bt455_set_cursor(struct bt455_regs *regs)
    73. 

  73. {
    74. 

  74. 	mb();
    75. 

  75. 	regs->addr_ovly = 0x0f;
    76. 

  76. 	wmb();
    77. 

  77. 	regs->addr_ovly = 0x0f;
    78. 

  78. 	wmb();
    79. 

  79. 	regs->addr_ovly = 0x0f;
    80. 

  80. }
    81. 

  81. 

  82. static inline void bt455_erase_cursor(struct bt455_regs *regs)
    83. 

  83. {
    84. 

  84. 	/* bt455_write_cmap_entry(regs, 8, 0x00, 0x00, 0x00); */
    85. 

  85. 	/* bt455_write_cmap_entry(regs, 9, 0x00, 0x00, 0x00); */
    86. 

  86. 	bt455_write_ovly_entry(regs, 8, 0x03, 0x03, 0x03);
    87. 

  87. 	bt455_write_ovly_entry(regs, 9, 0x07, 0x07, 0x07);
    88. 

  88. 

  89. 	wmb();
    90. 

  90. 	regs->addr_ovly = 0x09;
    91. 

  91. 	wmb();
    92. 

  92. 	regs->addr_ovly = 0x09;
    93. 

  93. 	wmb();
    94. 

  94. 	regs->addr_ovly = 0x09;
    95. 

  95. }
    96. 

  96.