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_SH_CAYMAN) 25 #include <asm/irq.h> 26 #elif defined(CONFIG_PPC) 27 extern int of_i8042_kbd_irq; 28 extern int of_i8042_aux_irq; 29 # define I8042_KBD_IRQ of_i8042_kbd_irq 30 # define I8042_AUX_IRQ of_i8042_aux_irq 31 #else 32 # define I8042_KBD_IRQ 1 33 # define I8042_AUX_IRQ 12 34 #endif 35 36 37 /* 38 * Register numbers. 39 */ 40 41 #define I8042_COMMAND_REG 0x64 42 #define I8042_STATUS_REG 0x64 43 #define I8042_DATA_REG 0x60 44 45 static inline int i8042_read_data(void) 46 { 47 return inb(I8042_DATA_REG); 48 } 49 50 static inline int i8042_read_status(void) 51 { 52 return inb(I8042_STATUS_REG); 53 } 54 55 static inline void i8042_write_data(int val) 56 { 57 outb(val, I8042_DATA_REG); 58 } 59 60 static inline void i8042_write_command(int val) 61 { 62 outb(val, I8042_COMMAND_REG); 63 } 64 65 static inline int i8042_platform_init(void) 66 { 67 /* 68 * On some platforms touching the i8042 data register region can do really 69 * bad things. Because of this the region is always reserved on such boxes. 70 */ 71 #if defined(CONFIG_PPC) 72 if (check_legacy_ioport(I8042_DATA_REG)) 73 return -ENODEV; 74 #endif 75 #if !defined(__sh__) && !defined(__alpha__) 76 if (!request_region(I8042_DATA_REG, 16, "i8042")) 77 return -EBUSY; 78 #endif 79 80 i8042_reset = I8042_RESET_ALWAYS; 81 return 0; 82 } 83 84 static inline void i8042_platform_exit(void) 85 { 86 #if !defined(__sh__) && !defined(__alpha__) 87 release_region(I8042_DATA_REG, 16); 88 #endif 89 } 90 91 #endif /* _I8042_IO_H */ 92