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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
14static int i8042_kbd_irq = -1;
15static 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
23static void __iomem *kbd_iobase;
24
25#define I8042_COMMAND_REG (kbd_iobase + 0x64UL)
26#define I8042_DATA_REG (kbd_iobase + 0x60UL)
27
28static inline int i8042_read_data(void)
29{
30 return readb(kbd_iobase + 0x60UL);
31}
32
33static inline int i8042_read_status(void)
34{
35 return readb(kbd_iobase + 0x64UL);
36}
37
38static inline void i8042_write_data(int val)
39{
40 writeb(val, kbd_iobase + 0x60UL);
41}
42
43static inline void i8042_write_command(int val)
44{
45 writeb(val, kbd_iobase + 0x64UL);
46}
47
48#ifdef CONFIG_PCI
49
50static 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
57static 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
85static int sparc_i8042_remove(struct platform_device *op)
86{
87 of_iounmap(kbd_res, kbd_iobase, 8);
88
89 return 0;
90}
91
92static const struct of_device_id sparc_i8042_match[] = {
93 {
94 .name = "8042",
95 },
96 {},
97};
98MODULE_DEVICE_TABLE(of, sparc_i8042_match);
99
100static 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
109static 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
125static 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
153static 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 */
160static int __init i8042_platform_init(void)
161{
162 return -ENODEV;
163}
164
165static inline void i8042_platform_exit(void)
166{
167}
168#endif /* !CONFIG_PCI */
169
170#endif /* _I8042_SPARCIO_H */
171

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source code of linux/drivers/input/serio/i8042-sparcio.h