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 
21 #define I8042_COMMAND_REG	(kbd_iobase + 0x64UL)
22 #define I8042_DATA_REG		(kbd_iobase + 0x60UL)
23 
24 static inline int i8042_read_data(void)
25 {
26 	return readb(kbd_iobase + 0x60UL);
27 }
28 
29 static inline int i8042_read_status(void)
30 {
31 	return readb(kbd_iobase + 0x64UL);
32 }
33 
34 static inline void i8042_write_data(int val)
35 {
36 	writeb(val, kbd_iobase + 0x60UL);
37 }
38 
39 static inline void i8042_write_command(int val)
40 {
41 	writeb(val, kbd_iobase + 0x64UL);
42 }
43 
44 #ifdef CONFIG_PCI
45 
46 static struct resource *kbd_res;
47 
48 #define OBP_PS2KBD_NAME1	"kb_ps2"
49 #define OBP_PS2KBD_NAME2	"keyboard"
50 #define OBP_PS2MS_NAME1		"kdmouse"
51 #define OBP_PS2MS_NAME2		"mouse"
52 
53 static int sparc_i8042_probe(struct platform_device *op)
54 {
55 	struct device_node *dp = op->dev.of_node;
56 
57 	dp = dp->child;
58 	while (dp) {
59 		if (!strcmp(dp->name, OBP_PS2KBD_NAME1) ||
60 		    !strcmp(dp->name, OBP_PS2KBD_NAME2)) {
61 			struct platform_device *kbd = of_find_device_by_node(dp);
62 			unsigned int irq = kbd->archdata.irqs[0];
63 			if (irq == 0xffffffff)
64 				irq = op->archdata.irqs[0];
65 			i8042_kbd_irq = irq;
66 			kbd_iobase = of_ioremap(&kbd->resource[0],
67 						0, 8, "kbd");
68 			kbd_res = &kbd->resource[0];
69 		} else if (!strcmp(dp->name, OBP_PS2MS_NAME1) ||
70 			   !strcmp(dp->name, OBP_PS2MS_NAME2)) {
71 			struct platform_device *ms = of_find_device_by_node(dp);
72 			unsigned int irq = ms->archdata.irqs[0];
73 			if (irq == 0xffffffff)
74 				irq = op->archdata.irqs[0];
75 			i8042_aux_irq = irq;
76 		}
77 
78 		dp = dp->sibling;
79 	}
80 
81 	return 0;
82 }
83 
84 static int sparc_i8042_remove(struct platform_device *op)
85 {
86 	of_iounmap(kbd_res, kbd_iobase, 8);
87 
88 	return 0;
89 }
90 
91 static const struct of_device_id sparc_i8042_match[] = {
92 	{
93 		.name = "8042",
94 	},
95 	{},
96 };
97 MODULE_DEVICE_TABLE(of, sparc_i8042_match);
98 
99 static struct platform_driver sparc_i8042_driver = {
100 	.driver = {
101 		.name = "i8042",
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 = I8042_RESET_ALWAYS;
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