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
i8042_read_data(void)28 static inline int i8042_read_data(void)
29 {
30 return readb(kbd_iobase + 0x60UL);
31 }
32
i8042_read_status(void)33 static inline int i8042_read_status(void)
34 {
35 return readb(kbd_iobase + 0x64UL);
36 }
37
i8042_write_data(int val)38 static inline void i8042_write_data(int val)
39 {
40 writeb(val, kbd_iobase + 0x60UL);
41 }
42
i8042_write_command(int val)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
sparc_i8042_probe(struct platform_device * op)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
sparc_i8042_remove(struct platform_device * op)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
i8042_is_mr_coffee(void)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
i8042_platform_init(void)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
i8042_platform_exit(void)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 */
i8042_platform_init(void)160 static int __init i8042_platform_init(void)
161 {
162 return -ENODEV;
163 }
164
i8042_platform_exit(void)165 static inline void i8042_platform_exit(void)
166 {
167 }
168 #endif /* !CONFIG_PCI */
169
170 #endif /* _I8042_SPARCIO_H */
171