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
i8042_read_data(void)26 static inline int i8042_read_data(void)
27 {
28 return readb(kbd_iobase + 0x60UL);
29 }
30
i8042_read_status(void)31 static inline int i8042_read_status(void)
32 {
33 return readb(kbd_iobase + 0x64UL);
34 }
35
i8042_write_data(int val)36 static inline void i8042_write_data(int val)
37 {
38 writeb(val, kbd_iobase + 0x60UL);
39 }
40
i8042_write_command(int val)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
sparc_i8042_probe(struct platform_device * op)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
sparc_i8042_remove(struct platform_device * op)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
i8042_is_mr_coffee(void)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
i8042_platform_init(void)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
i8042_platform_exit(void)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 */
i8042_platform_init(void)158 static int __init i8042_platform_init(void)
159 {
160 return -ENODEV;
161 }
162
i8042_platform_exit(void)163 static inline void i8042_platform_exit(void)
164 {
165 }
166 #endif /* !CONFIG_PCI */
167
168 #endif /* _I8042_SPARCIO_H */
169