GNU Linux-libre 4.14.266-gnu1
[releases.git] / drivers / input / serio / i8042-sparcio.h
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 */