1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _I8042_SPARCIO_H 3 #define _I8042_SPARCIO_H 4 5 #include <linux/of_device.h> 6 7 #include <asm/io.h> 8 #include <asm/oplib.h> 9 #include <asm/prom.h> 10 11 static int i8042_kbd_irq = -1; 12 static int i8042_aux_irq = -1; 13 #define I8042_KBD_IRQ i8042_kbd_irq 14 #define I8042_AUX_IRQ i8042_aux_irq 15 16 #define I8042_KBD_PHYS_DESC "sparcps2/serio0" 17 #define I8042_AUX_PHYS_DESC "sparcps2/serio1" 18 #define I8042_MUX_PHYS_DESC "sparcps2/serio%d" 19 20 static void __iomem *kbd_iobase; 21 22 #define I8042_COMMAND_REG (kbd_iobase + 0x64UL) 23 #define I8042_DATA_REG (kbd_iobase + 0x60UL) 24 25 static inline int i8042_read_data(void) 26 { 27 return readb(kbd_iobase + 0x60UL); 28 } 29 30 static inline int i8042_read_status(void) 31 { 32 return readb(kbd_iobase + 0x64UL); 33 } 34 35 static inline void i8042_write_data(int val) 36 { 37 writeb(val, kbd_iobase + 0x60UL); 38 } 39 40 static inline void i8042_write_command(int val) 41 { 42 writeb(val, kbd_iobase + 0x64UL); 43 } 44 45 #ifdef CONFIG_PCI 46 47 static struct resource *kbd_res; 48 49 #define OBP_PS2KBD_NAME1 "kb_ps2" 50 #define OBP_PS2KBD_NAME2 "keyboard" 51 #define OBP_PS2MS_NAME1 "kdmouse" 52 #define OBP_PS2MS_NAME2 "mouse" 53 54 static int sparc_i8042_probe(struct platform_device *op) 55 { 56 struct device_node *dp; 57 58 for_each_child_of_node(op->dev.of_node, dp) { 59 if (of_node_name_eq(dp, OBP_PS2KBD_NAME1) || 60 of_node_name_eq(dp, OBP_PS2KBD_NAME2)) { 61 struct platform_device *kbd = of_find_device_by_node(dp); 62 unsigned int irq = kbd->archdata.irqs[0]; 63 if (irq == 0xffffffff) 64 irq = op->archdata.irqs[0]; 65 i8042_kbd_irq = irq; 66 kbd_iobase = of_ioremap(&kbd->resource[0], 67 0, 8, "kbd"); 68 kbd_res = &kbd->resource[0]; 69 } else if (of_node_name_eq(dp, OBP_PS2MS_NAME1) || 70 of_node_name_eq(dp, OBP_PS2MS_NAME2)) { 71 struct platform_device *ms = of_find_device_by_node(dp); 72 unsigned int irq = ms->archdata.irqs[0]; 73 if (irq == 0xffffffff) 74 irq = op->archdata.irqs[0]; 75 i8042_aux_irq = irq; 76 } 77 } 78 79 return 0; 80 } 81 82 static int sparc_i8042_remove(struct platform_device *op) 83 { 84 of_iounmap(kbd_res, kbd_iobase, 8); 85 86 return 0; 87 } 88 89 static const struct of_device_id sparc_i8042_match[] = { 90 { 91 .name = "8042", 92 }, 93 {}, 94 }; 95 MODULE_DEVICE_TABLE(of, sparc_i8042_match); 96 97 static struct platform_driver sparc_i8042_driver = { 98 .driver = { 99 .name = "i8042", 100 .of_match_table = sparc_i8042_match, 101 }, 102 .probe = sparc_i8042_probe, 103 .remove = sparc_i8042_remove, 104 }; 105 106 static int __init i8042_platform_init(void) 107 { 108 struct device_node *root = of_find_node_by_path("/"); 109 const char *name = of_get_property(root, "name", NULL); 110 111 if (name && !strcmp(name, "SUNW,JavaStation-1")) { 112 /* Hardcoded values for MrCoffee. */ 113 i8042_kbd_irq = i8042_aux_irq = 13 | 0x20; 114 kbd_iobase = ioremap(0x71300060, 8); 115 if (!kbd_iobase) 116 return -ENODEV; 117 } else { 118 int err = platform_driver_register(&sparc_i8042_driver); 119 if (err) 120 return err; 121 122 if (i8042_kbd_irq == -1 || 123 i8042_aux_irq == -1) { 124 if (kbd_iobase) { 125 of_iounmap(kbd_res, kbd_iobase, 8); 126 kbd_iobase = (void __iomem *) NULL; 127 } 128 return -ENODEV; 129 } 130 } 131 132 i8042_reset = I8042_RESET_ALWAYS; 133 134 return 0; 135 } 136 137 static inline void i8042_platform_exit(void) 138 { 139 struct device_node *root = of_find_node_by_path("/"); 140 const char *name = of_get_property(root, "name", NULL); 141 142 if (!name || strcmp(name, "SUNW,JavaStation-1")) 143 platform_driver_unregister(&sparc_i8042_driver); 144 } 145 146 #else /* !CONFIG_PCI */ 147 static int __init i8042_platform_init(void) 148 { 149 return -ENODEV; 150 } 151 152 static inline void i8042_platform_exit(void) 153 { 154 } 155 #endif /* !CONFIG_PCI */ 156 157 #endif /* _I8042_SPARCIO_H */ 158