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 
25 static inline int i8042_read_data(void)
26 {
27 	return readb(kbd_iobase + 0x60UL);
28 }
29 
30 static inline int i8042_read_status(void)
31 {
32 	return readb(kbd_iobase + 0x64UL);
33 }
34 
35 static inline void i8042_write_data(int val)
36 {
37 	writeb(val, kbd_iobase + 0x60UL);
38 }
39 
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 
54 static 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 
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 
109 static 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 
139 static 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 */
148 static int __init i8042_platform_init(void)
149 {
150 	return -ENODEV;
151 }
152 
153 static inline void i8042_platform_exit(void)
154 {
155 }
156 #endif /* !CONFIG_PCI */
157 
158 #endif /* _I8042_SPARCIO_H */
159