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 #include <linux/types.h> 7 8 #include <asm/io.h> 9 #include <asm/oplib.h> 10 #include <asm/prom.h> 11 12 static int i8042_kbd_irq = -1; 13 static int i8042_aux_irq = -1; 14 #define I8042_KBD_IRQ i8042_kbd_irq 15 #define I8042_AUX_IRQ i8042_aux_irq 16 17 #define I8042_KBD_PHYS_DESC "sparcps2/serio0" 18 #define I8042_AUX_PHYS_DESC "sparcps2/serio1" 19 #define I8042_MUX_PHYS_DESC "sparcps2/serio%d" 20 21 static void __iomem *kbd_iobase; 22 23 #define I8042_COMMAND_REG (kbd_iobase + 0x64UL) 24 #define I8042_DATA_REG (kbd_iobase + 0x60UL) 25 26 static inline int i8042_read_data(void) 27 { 28 return readb(kbd_iobase + 0x60UL); 29 } 30 31 static inline int i8042_read_status(void) 32 { 33 return readb(kbd_iobase + 0x64UL); 34 } 35 36 static inline void i8042_write_data(int val) 37 { 38 writeb(val, kbd_iobase + 0x60UL); 39 } 40 41 static inline void i8042_write_command(int val) 42 { 43 writeb(val, kbd_iobase + 0x64UL); 44 } 45 46 #ifdef CONFIG_PCI 47 48 static struct resource *kbd_res; 49 50 #define OBP_PS2KBD_NAME1 "kb_ps2" 51 #define OBP_PS2KBD_NAME2 "keyboard" 52 #define OBP_PS2MS_NAME1 "kdmouse" 53 #define OBP_PS2MS_NAME2 "mouse" 54 55 static int sparc_i8042_probe(struct platform_device *op) 56 { 57 struct device_node *dp; 58 59 for_each_child_of_node(op->dev.of_node, dp) { 60 if (of_node_name_eq(dp, OBP_PS2KBD_NAME1) || 61 of_node_name_eq(dp, OBP_PS2KBD_NAME2)) { 62 struct platform_device *kbd = of_find_device_by_node(dp); 63 unsigned int irq = kbd->archdata.irqs[0]; 64 if (irq == 0xffffffff) 65 irq = op->archdata.irqs[0]; 66 i8042_kbd_irq = irq; 67 kbd_iobase = of_ioremap(&kbd->resource[0], 68 0, 8, "kbd"); 69 kbd_res = &kbd->resource[0]; 70 } else if (of_node_name_eq(dp, OBP_PS2MS_NAME1) || 71 of_node_name_eq(dp, OBP_PS2MS_NAME2)) { 72 struct platform_device *ms = of_find_device_by_node(dp); 73 unsigned int irq = ms->archdata.irqs[0]; 74 if (irq == 0xffffffff) 75 irq = op->archdata.irqs[0]; 76 i8042_aux_irq = irq; 77 } 78 } 79 80 return 0; 81 } 82 83 static int sparc_i8042_remove(struct platform_device *op) 84 { 85 of_iounmap(kbd_res, kbd_iobase, 8); 86 87 return 0; 88 } 89 90 static const struct of_device_id sparc_i8042_match[] = { 91 { 92 .name = "8042", 93 }, 94 {}, 95 }; 96 MODULE_DEVICE_TABLE(of, sparc_i8042_match); 97 98 static struct platform_driver sparc_i8042_driver = { 99 .driver = { 100 .name = "i8042", 101 .of_match_table = sparc_i8042_match, 102 }, 103 .probe = sparc_i8042_probe, 104 .remove = sparc_i8042_remove, 105 }; 106 107 static bool i8042_is_mr_coffee(void) 108 { 109 struct device_node *root; 110 const char *name; 111 bool is_mr_coffee; 112 113 root = of_find_node_by_path("/"); 114 115 name = of_get_property(root, "name", NULL); 116 is_mr_coffee = name && !strcmp(name, "SUNW,JavaStation-1"); 117 118 of_node_put(root); 119 120 return is_mr_coffee; 121 } 122 123 static int __init i8042_platform_init(void) 124 { 125 if (i8042_is_mr_coffee()) { 126 /* Hardcoded values for MrCoffee. */ 127 i8042_kbd_irq = i8042_aux_irq = 13 | 0x20; 128 kbd_iobase = ioremap(0x71300060, 8); 129 if (!kbd_iobase) 130 return -ENODEV; 131 } else { 132 int err = platform_driver_register(&sparc_i8042_driver); 133 if (err) 134 return err; 135 136 if (i8042_kbd_irq == -1 || 137 i8042_aux_irq == -1) { 138 if (kbd_iobase) { 139 of_iounmap(kbd_res, kbd_iobase, 8); 140 kbd_iobase = (void __iomem *) NULL; 141 } 142 return -ENODEV; 143 } 144 } 145 146 i8042_reset = I8042_RESET_ALWAYS; 147 148 return 0; 149 } 150 151 static inline void i8042_platform_exit(void) 152 { 153 if (!i8042_is_mr_coffee()) 154 platform_driver_unregister(&sparc_i8042_driver); 155 } 156 157 #else /* !CONFIG_PCI */ 158 static int __init i8042_platform_init(void) 159 { 160 return -ENODEV; 161 } 162 163 static inline void i8042_platform_exit(void) 164 { 165 } 166 #endif /* !CONFIG_PCI */ 167 168 #endif /* _I8042_SPARCIO_H */ 169