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
i8042_read_data(void)25 static inline int i8042_read_data(void)
26 {
27 return readb(kbd_iobase + 0x60UL);
28 }
29
i8042_read_status(void)30 static inline int i8042_read_status(void)
31 {
32 return readb(kbd_iobase + 0x64UL);
33 }
34
i8042_write_data(int val)35 static inline void i8042_write_data(int val)
36 {
37 writeb(val, kbd_iobase + 0x60UL);
38 }
39
i8042_write_command(int val)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
sparc_i8042_probe(struct platform_device * op)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
sparc_i8042_remove(struct platform_device * op)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
i8042_platform_init(void)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
i8042_platform_exit(void)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 */
i8042_platform_init(void)147 static int __init i8042_platform_init(void)
148 {
149 return -ENODEV;
150 }
151
i8042_platform_exit(void)152 static inline void i8042_platform_exit(void)
153 {
154 }
155 #endif /* !CONFIG_PCI */
156
157 #endif /* _I8042_SPARCIO_H */
158
