1 #ifndef _I8042_SPARCIO_H
2 #define _I8042_SPARCIO_H
3 
4 #include <linux/of_device.h>
5 
6 #include <asm/io.h>
7 #include <asm/oplib.h>
8 #include <asm/prom.h>
9 
10 static int i8042_kbd_irq = -1;
11 static int i8042_aux_irq = -1;
12 #define I8042_KBD_IRQ i8042_kbd_irq
13 #define I8042_AUX_IRQ i8042_aux_irq
14 
15 #define I8042_KBD_PHYS_DESC "sparcps2/serio0"
16 #define I8042_AUX_PHYS_DESC "sparcps2/serio1"
17 #define I8042_MUX_PHYS_DESC "sparcps2/serio%d"
18 
19 static void __iomem *kbd_iobase;
20 static struct resource *kbd_res;
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 #define OBP_PS2KBD_NAME1	"kb_ps2"
48 #define OBP_PS2KBD_NAME2	"keyboard"
49 #define OBP_PS2MS_NAME1		"kdmouse"
50 #define OBP_PS2MS_NAME2		"mouse"
51 
52 static int sparc_i8042_probe(struct platform_device *op)
53 {
54 	struct device_node *dp = op->dev.of_node;
55 
56 	dp = dp->child;
57 	while (dp) {
58 		if (!strcmp(dp->name, OBP_PS2KBD_NAME1) ||
59 		    !strcmp(dp->name, OBP_PS2KBD_NAME2)) {
60 			struct platform_device *kbd = of_find_device_by_node(dp);
61 			unsigned int irq = kbd->archdata.irqs[0];
62 			if (irq == 0xffffffff)
63 				irq = op->archdata.irqs[0];
64 			i8042_kbd_irq = irq;
65 			kbd_iobase = of_ioremap(&kbd->resource[0],
66 						0, 8, "kbd");
67 			kbd_res = &kbd->resource[0];
68 		} else if (!strcmp(dp->name, OBP_PS2MS_NAME1) ||
69 			   !strcmp(dp->name, OBP_PS2MS_NAME2)) {
70 			struct platform_device *ms = of_find_device_by_node(dp);
71 			unsigned int irq = ms->archdata.irqs[0];
72 			if (irq == 0xffffffff)
73 				irq = op->archdata.irqs[0];
74 			i8042_aux_irq = irq;
75 		}
76 
77 		dp = dp->sibling;
78 	}
79 
80 	return 0;
81 }
82 
83 static int sparc_i8042_remove(struct platform_device *op)
84 {
85 	of_iounmap(kbd_res, kbd_iobase, 8);
86 
87 	return 0;
88 }
89 
90 static const struct of_device_id sparc_i8042_match[] = {
91 	{
92 		.name = "8042",
93 	},
94 	{},
95 };
96 MODULE_DEVICE_TABLE(of, sparc_i8042_match);
97 
98 static struct platform_driver sparc_i8042_driver = {
99 	.driver = {
100 		.name = "i8042",
101 		.owner = THIS_MODULE,
102 		.of_match_table = sparc_i8042_match,
103 	},
104 	.probe		= sparc_i8042_probe,
105 	.remove		= sparc_i8042_remove,
106 };
107 
108 static int __init i8042_platform_init(void)
109 {
110 	struct device_node *root = of_find_node_by_path("/");
111 
112 	if (!strcmp(root->name, "SUNW,JavaStation-1")) {
113 		/* Hardcoded values for MrCoffee.  */
114 		i8042_kbd_irq = i8042_aux_irq = 13 | 0x20;
115 		kbd_iobase = ioremap(0x71300060, 8);
116 		if (!kbd_iobase)
117 			return -ENODEV;
118 	} else {
119 		int err = platform_driver_register(&sparc_i8042_driver);
120 		if (err)
121 			return err;
122 
123 		if (i8042_kbd_irq == -1 ||
124 		    i8042_aux_irq == -1) {
125 			if (kbd_iobase) {
126 				of_iounmap(kbd_res, kbd_iobase, 8);
127 				kbd_iobase = (void __iomem *) NULL;
128 			}
129 			return -ENODEV;
130 		}
131 	}
132 
133 	i8042_reset = 1;
134 
135 	return 0;
136 }
137 
138 static inline void i8042_platform_exit(void)
139 {
140 	struct device_node *root = of_find_node_by_path("/");
141 
142 	if (strcmp(root->name, "SUNW,JavaStation-1"))
143 		platform_driver_unregister(&sparc_i8042_driver);
144 }
145 
146 #else /* !CONFIG_PCI */
147 static int __init i8042_platform_init(void)
148 {
149 	return -ENODEV;
150 }
151 
152 static inline void i8042_platform_exit(void)
153 {
154 }
155 #endif /* !CONFIG_PCI */
156 
157 #endif /* _I8042_SPARCIO_H */
158