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