tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
11static int i8042_kbd_irq = -1;
12static 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
20static void __iomem *kbd_iobase;
21
22#define I8042_COMMAND_REG (kbd_iobase + 0x64UL)
23#define I8042_DATA_REG (kbd_iobase + 0x60UL)
24
25static inline int i8042_read_data(void)
26{
27 return readb(kbd_iobase + 0x60UL);
28}
29
30static inline int i8042_read_status(void)
31{
32 return readb(kbd_iobase + 0x64UL);
33}
34
35static inline void i8042_write_data(int val)
36{
37 writeb(val, kbd_iobase + 0x60UL);
38}
39
40static inline void i8042_write_command(int val)
41{
42 writeb(val, kbd_iobase + 0x64UL);
43}
44
45#ifdef CONFIG_PCI
46
47static 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
54static int sparc_i8042_probe(struct platform_device *op)
55{
56 struct device_node *dp = op->dev.of_node;
57
58 dp = dp->child;
59 while (dp) {
60 if (!strcmp(dp->name, OBP_PS2KBD_NAME1) ||
61 !strcmp(dp->name, 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 (!strcmp(dp->name, OBP_PS2MS_NAME1) ||
71 !strcmp(dp->name, 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 dp = dp->sibling;
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 int __init i8042_platform_init(void)
110{
111 struct device_node *root = of_find_node_by_path("/");
112
113 if (!strcmp(root->name, "SUNW,JavaStation-1")) {
114 /* Hardcoded values for MrCoffee. */
115 i8042_kbd_irq = i8042_aux_irq = 13 | 0x20;
116 kbd_iobase = ioremap(0x71300060, 8);
117 if (!kbd_iobase)
118 return -ENODEV;
119 } else {
120 int err = platform_driver_register(&sparc_i8042_driver);
121 if (err)
122 return err;
123
124 if (i8042_kbd_irq == -1 ||
125 i8042_aux_irq == -1) {
126 if (kbd_iobase) {
127 of_iounmap(kbd_res, kbd_iobase, 8);
128 kbd_iobase = (void __iomem *) NULL;
129 }
130 return -ENODEV;
131 }
132 }
133
134 i8042_reset = I8042_RESET_ALWAYS;
135
136 return 0;
137}
138
139static inline void i8042_platform_exit(void)
140{
141 struct device_node *root = of_find_node_by_path("/");
142
143 if (strcmp(root->name, "SUNW,JavaStation-1"))
144 platform_driver_unregister(&sparc_i8042_driver);
145}
146
147#else /* !CONFIG_PCI */
148static int __init i8042_platform_init(void)
149{
150 return -ENODEV;
151}
152
153static inline void i8042_platform_exit(void)
154{
155}
156#endif /* !CONFIG_PCI */
157
158#endif /* _I8042_SPARCIO_H */