i8042-sparcio.h 3.5 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef _I8042_SPARCIO_H
  3. #define _I8042_SPARCIO_H
  4. #include <linux/of_device.h>
  5. #include <asm/io.h>
  6. #include <asm/oplib.h>
  7. #include <asm/prom.h>
  8. static int i8042_kbd_irq = -1;
  9. static int i8042_aux_irq = -1;
  10. #define I8042_KBD_IRQ i8042_kbd_irq
  11. #define I8042_AUX_IRQ i8042_aux_irq
  12. #define I8042_KBD_PHYS_DESC "sparcps2/serio0"
  13. #define I8042_AUX_PHYS_DESC "sparcps2/serio1"
  14. #define I8042_MUX_PHYS_DESC "sparcps2/serio%d"
  15. static void __iomem *kbd_iobase;
  16. #define I8042_COMMAND_REG (kbd_iobase + 0x64UL)
  17. #define I8042_DATA_REG (kbd_iobase + 0x60UL)
  18. static inline int i8042_read_data(void)
  19. {
  20. return readb(kbd_iobase + 0x60UL);
  21. }
  22. static inline int i8042_read_status(void)
  23. {
  24. return readb(kbd_iobase + 0x64UL);
  25. }
  26. static inline void i8042_write_data(int val)
  27. {
  28. writeb(val, kbd_iobase + 0x60UL);
  29. }
  30. static inline void i8042_write_command(int val)
  31. {
  32. writeb(val, kbd_iobase + 0x64UL);
  33. }
  34. #ifdef CONFIG_PCI
  35. static struct resource *kbd_res;
  36. #define OBP_PS2KBD_NAME1 "kb_ps2"
  37. #define OBP_PS2KBD_NAME2 "keyboard"
  38. #define OBP_PS2MS_NAME1 "kdmouse"
  39. #define OBP_PS2MS_NAME2 "mouse"
  40. static int sparc_i8042_probe(struct platform_device *op)
  41. {
  42. struct device_node *dp;
  43. for_each_child_of_node(op->dev.of_node, dp) {
  44. if (of_node_name_eq(dp, OBP_PS2KBD_NAME1) ||
  45. of_node_name_eq(dp, OBP_PS2KBD_NAME2)) {
  46. struct platform_device *kbd = of_find_device_by_node(dp);
  47. unsigned int irq = kbd->archdata.irqs[0];
  48. if (irq == 0xffffffff)
  49. irq = op->archdata.irqs[0];
  50. i8042_kbd_irq = irq;
  51. kbd_iobase = of_ioremap(&kbd->resource[0],
  52. 0, 8, "kbd");
  53. kbd_res = &kbd->resource[0];
  54. } else if (of_node_name_eq(dp, OBP_PS2MS_NAME1) ||
  55. of_node_name_eq(dp, OBP_PS2MS_NAME2)) {
  56. struct platform_device *ms = of_find_device_by_node(dp);
  57. unsigned int irq = ms->archdata.irqs[0];
  58. if (irq == 0xffffffff)
  59. irq = op->archdata.irqs[0];
  60. i8042_aux_irq = irq;
  61. }
  62. }
  63. return 0;
  64. }
  65. static int sparc_i8042_remove(struct platform_device *op)
  66. {
  67. of_iounmap(kbd_res, kbd_iobase, 8);
  68. return 0;
  69. }
  70. static const struct of_device_id sparc_i8042_match[] = {
  71. {
  72. .name = "8042",
  73. },
  74. {},
  75. };
  76. MODULE_DEVICE_TABLE(of, sparc_i8042_match);
  77. static struct platform_driver sparc_i8042_driver = {
  78. .driver = {
  79. .name = "i8042",
  80. .of_match_table = sparc_i8042_match,
  81. },
  82. .probe = sparc_i8042_probe,
  83. .remove = sparc_i8042_remove,
  84. };
  85. static int __init i8042_platform_init(void)
  86. {
  87. struct device_node *root = of_find_node_by_path("/");
  88. const char *name = of_get_property(root, "name", NULL);
  89. if (name && !strcmp(name, "SUNW,JavaStation-1")) {
  90. /* Hardcoded values for MrCoffee. */
  91. i8042_kbd_irq = i8042_aux_irq = 13 | 0x20;
  92. kbd_iobase = ioremap(0x71300060, 8);
  93. if (!kbd_iobase)
  94. return -ENODEV;
  95. } else {
  96. int err = platform_driver_register(&sparc_i8042_driver);
  97. if (err)
  98. return err;
  99. if (i8042_kbd_irq == -1 ||
  100. i8042_aux_irq == -1) {
  101. if (kbd_iobase) {
  102. of_iounmap(kbd_res, kbd_iobase, 8);
  103. kbd_iobase = (void __iomem *) NULL;
  104. }
  105. return -ENODEV;
  106. }
  107. }
  108. i8042_reset = I8042_RESET_ALWAYS;
  109. return 0;
  110. }
  111. static inline void i8042_platform_exit(void)
  112. {
  113. struct device_node *root = of_find_node_by_path("/");
  114. const char *name = of_get_property(root, "name", NULL);
  115. if (!name || strcmp(name, "SUNW,JavaStation-1"))
  116. platform_driver_unregister(&sparc_i8042_driver);
  117. }
  118. #else /* !CONFIG_PCI */
  119. static int __init i8042_platform_init(void)
  120. {
  121. return -ENODEV;
  122. }
  123. static inline void i8042_platform_exit(void)
  124. {
  125. }
  126. #endif /* !CONFIG_PCI */
  127. #endif /* _I8042_SPARCIO_H */