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1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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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 | |
14 | static int i8042_kbd_irq = -1; |
15 | static 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 | |
23 | static void __iomem *kbd_iobase; |
24 | |
25 | #define I8042_COMMAND_REG (kbd_iobase + 0x64UL) |
26 | #define I8042_DATA_REG (kbd_iobase + 0x60UL) |
27 | |
28 | static inline int i8042_read_data(void) |
29 | { |
30 | return readb(kbd_iobase + 0x60UL); |
31 | } |
32 | |
33 | static inline int i8042_read_status(void) |
34 | { |
35 | return readb(kbd_iobase + 0x64UL); |
36 | } |
37 | |
38 | static inline void i8042_write_data(int val) |
39 | { |
40 | writeb(val, kbd_iobase + 0x60UL); |
41 | } |
42 | |
43 | static inline void i8042_write_command(int val) |
44 | { |
45 | writeb(val, kbd_iobase + 0x64UL); |
46 | } |
47 | |
48 | #ifdef CONFIG_PCI |
49 | |
50 | static 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 | |
57 | static 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 | |
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 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 | |
125 | static 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 | |
153 | static 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 */ |
160 | static int __init i8042_platform_init(void) |
161 | { |
162 | return -ENODEV; |
163 | } |
164 | |
165 | static inline void i8042_platform_exit(void) |
166 | { |
167 | } |
168 | #endif /* !CONFIG_PCI */ |
169 | |
170 | #endif /* _I8042_SPARCIO_H */ |
171 |
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