1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 #ifndef _I8042_IO_H 3 #define _I8042_IO_H 4 5 6 /* 7 * Names. 8 */ 9 10 #define I8042_KBD_PHYS_DESC "isa0060/serio0" 11 #define I8042_AUX_PHYS_DESC "isa0060/serio1" 12 #define I8042_MUX_PHYS_DESC "isa0060/serio%d" 13 14 /* 15 * IRQs. 16 */ 17 18 #ifdef __alpha__ 19 # define I8042_KBD_IRQ 1 20 # define I8042_AUX_IRQ (RTC_PORT(0) == 0x170 ? 9 : 12) /* Jensen is special */ 21 #elif defined(__arm__) 22 /* defined in include/asm-arm/arch-xxx/irqs.h */ 23 #include <asm/irq.h> 24 #elif defined(CONFIG_PPC) 25 extern int of_i8042_kbd_irq; 26 extern int of_i8042_aux_irq; 27 # define I8042_KBD_IRQ of_i8042_kbd_irq 28 # define I8042_AUX_IRQ of_i8042_aux_irq 29 #else 30 # define I8042_KBD_IRQ 1 31 # define I8042_AUX_IRQ 12 32 #endif 33 34 35 /* 36 * Register numbers. 37 */ 38 39 #define I8042_COMMAND_REG 0x64 40 #define I8042_STATUS_REG 0x64 41 #define I8042_DATA_REG 0x60 42 43 static inline int i8042_read_data(void) 44 { 45 return inb(I8042_DATA_REG); 46 } 47 48 static inline int i8042_read_status(void) 49 { 50 return inb(I8042_STATUS_REG); 51 } 52 53 static inline void i8042_write_data(int val) 54 { 55 outb(val, I8042_DATA_REG); 56 } 57 58 static inline void i8042_write_command(int val) 59 { 60 outb(val, I8042_COMMAND_REG); 61 } 62 63 static inline int i8042_platform_init(void) 64 { 65 /* 66 * On some platforms touching the i8042 data register region can do really 67 * bad things. Because of this the region is always reserved on such boxes. 68 */ 69 #if defined(CONFIG_PPC) 70 if (check_legacy_ioport(I8042_DATA_REG)) 71 return -ENODEV; 72 #endif 73 #if !defined(__sh__) && !defined(__alpha__) 74 if (!request_region(I8042_DATA_REG, 16, "i8042")) 75 return -EBUSY; 76 #endif 77 78 i8042_reset = I8042_RESET_ALWAYS; 79 return 0; 80 } 81 82 static inline void i8042_platform_exit(void) 83 { 84 #if !defined(__sh__) && !defined(__alpha__) 85 release_region(I8042_DATA_REG, 16); 86 #endif 87 } 88 89 #endif /* _I8042_IO_H */ 90