1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _I8042_SPARCIO_H 3 #define _I8042_SPARCIO_H 4 5 #include <linux/of.h> 6 #include <linux/of_platform.h> 7 #include <linux/platform_device.h> 8 #include <linux/types.h> 9 10 #include <asm/io.h> 11 #include <asm/oplib.h> 12 #include <asm/prom.h> 13 14 static int i8042_kbd_irq = -1; 15 static int i8042_aux_irq = -1; 16 #define I8042_KBD_IRQ i8042_kbd_irq 17 #define I8042_AUX_IRQ i8042_aux_irq 18 19 #define I8042_KBD_PHYS_DESC "sparcps2/serio0" 20 #define I8042_AUX_PHYS_DESC "sparcps2/serio1" 21 #define I8042_MUX_PHYS_DESC "sparcps2/serio%d" 22 23 static void __iomem *kbd_iobase; 24 25 #define I8042_COMMAND_REG (kbd_iobase + 0x64UL) 26 #define I8042_DATA_REG (kbd_iobase + 0x60UL) 27 28 static inline int i8042_read_data(void) 29 { 30 return readb(kbd_iobase + 0x60UL); 31 } 32 33 static inline int i8042_read_status(void) 34 { 35 return readb(kbd_iobase + 0x64UL); 36 } 37 38 static inline void i8042_write_data(int val) 39 { 40 writeb(val, kbd_iobase + 0x60UL); 41 } 42 43 static inline void i8042_write_command(int val) 44 { 45 writeb(val, kbd_iobase + 0x64UL); 46 } 47 48 #ifdef CONFIG_PCI 49 50 static struct resource *kbd_res; 51 52 #define OBP_PS2KBD_NAME1 "kb_ps2" 53 #define OBP_PS2KBD_NAME2 "keyboard" 54 #define OBP_PS2MS_NAME1 "kdmouse" 55 #define OBP_PS2MS_NAME2 "mouse" 56 57 static int sparc_i8042_probe(struct platform_device *op) 58 { 59 struct device_node *dp; 60 61 for_each_child_of_node(op->dev.of_node, dp) { 62 if (of_node_name_eq(dp, OBP_PS2KBD_NAME1) || 63 of_node_name_eq(dp, OBP_PS2KBD_NAME2)) { 64 struct platform_device *kbd = of_find_device_by_node(dp); 65 unsigned int irq = kbd->archdata.irqs[0]; 66 if (irq == 0xffffffff) 67 irq = op->archdata.irqs[0]; 68 i8042_kbd_irq = irq; 69 kbd_iobase = of_ioremap(&kbd->resource[0], 70 0, 8, "kbd"); 71 kbd_res = &kbd->resource[0]; 72 } else if (of_node_name_eq(dp, OBP_PS2MS_NAME1) || 73 of_node_name_eq(dp, OBP_PS2MS_NAME2)) { 74 struct platform_device *ms = of_find_device_by_node(dp); 75 unsigned int irq = ms->archdata.irqs[0]; 76 if (irq == 0xffffffff) 77 irq = op->archdata.irqs[0]; 78 i8042_aux_irq = irq; 79 } 80 } 81 82 return 0; 83 } 84 85 static int sparc_i8042_remove(struct platform_device *op) 86 { 87 of_iounmap(kbd_res, kbd_iobase, 8); 88 89 return 0; 90 } 91 92 static const struct of_device_id sparc_i8042_match[] = { 93 { 94 .name = "8042", 95 }, 96 {}, 97 }; 98 MODULE_DEVICE_TABLE(of, sparc_i8042_match); 99 100 static struct platform_driver sparc_i8042_driver = { 101 .driver = { 102 .name = "i8042", 103 .of_match_table = sparc_i8042_match, 104 }, 105 .probe = sparc_i8042_probe, 106 .remove = sparc_i8042_remove, 107 }; 108 109 static bool i8042_is_mr_coffee(void) 110 { 111 struct device_node *root; 112 const char *name; 113 bool is_mr_coffee; 114 115 root = of_find_node_by_path("/"); 116 117 name = of_get_property(root, "name", NULL); 118 is_mr_coffee = name && !strcmp(name, "SUNW,JavaStation-1"); 119 120 of_node_put(root); 121 122 return is_mr_coffee; 123 } 124 125 static int __init i8042_platform_init(void) 126 { 127 if (i8042_is_mr_coffee()) { 128 /* Hardcoded values for MrCoffee. */ 129 i8042_kbd_irq = i8042_aux_irq = 13 | 0x20; 130 kbd_iobase = ioremap(0x71300060, 8); 131 if (!kbd_iobase) 132 return -ENODEV; 133 } else { 134 int err = platform_driver_register(&sparc_i8042_driver); 135 if (err) 136 return err; 137 138 if (i8042_kbd_irq == -1 || 139 i8042_aux_irq == -1) { 140 if (kbd_iobase) { 141 of_iounmap(kbd_res, kbd_iobase, 8); 142 kbd_iobase = (void __iomem *) NULL; 143 } 144 return -ENODEV; 145 } 146 } 147 148 i8042_reset = I8042_RESET_ALWAYS; 149 150 return 0; 151 } 152 153 static inline void i8042_platform_exit(void) 154 { 155 if (!i8042_is_mr_coffee()) 156 platform_driver_unregister(&sparc_i8042_driver); 157 } 158 159 #else /* !CONFIG_PCI */ 160 static int __init i8042_platform_init(void) 161 { 162 return -ENODEV; 163 } 164 165 static inline void i8042_platform_exit(void) 166 { 167 } 168 #endif /* !CONFIG_PCI */ 169 170 #endif /* _I8042_SPARCIO_H */ 171