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1da177e4 LT |
1 | /* |
2 | * linux/drivers/input/serio/pcips2.c | |
3 | * | |
4 | * Copyright (C) 2003 Russell King, All Rights Reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License. | |
9 | * | |
10 | * I'm not sure if this is a generic PS/2 PCI interface or specific to | |
11 | * the Mobility Electronics docking station. | |
12 | */ | |
13 | #include <linux/module.h> | |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/ioport.h> | |
16 | #include <linux/input.h> | |
17 | #include <linux/pci.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/serio.h> | |
20 | #include <linux/delay.h> | |
21 | #include <asm/io.h> | |
22 | ||
23 | #define PS2_CTRL (0) | |
24 | #define PS2_STATUS (1) | |
25 | #define PS2_DATA (2) | |
26 | ||
27 | #define PS2_CTRL_CLK (1<<0) | |
28 | #define PS2_CTRL_DAT (1<<1) | |
29 | #define PS2_CTRL_TXIRQ (1<<2) | |
30 | #define PS2_CTRL_ENABLE (1<<3) | |
31 | #define PS2_CTRL_RXIRQ (1<<4) | |
32 | ||
33 | #define PS2_STAT_CLK (1<<0) | |
34 | #define PS2_STAT_DAT (1<<1) | |
35 | #define PS2_STAT_PARITY (1<<2) | |
36 | #define PS2_STAT_RXFULL (1<<5) | |
37 | #define PS2_STAT_TXBUSY (1<<6) | |
38 | #define PS2_STAT_TXEMPTY (1<<7) | |
39 | ||
40 | struct pcips2_data { | |
41 | struct serio *io; | |
42 | unsigned int base; | |
43 | struct pci_dev *dev; | |
44 | }; | |
45 | ||
46 | static int pcips2_write(struct serio *io, unsigned char val) | |
47 | { | |
48 | struct pcips2_data *ps2if = io->port_data; | |
49 | unsigned int stat; | |
50 | ||
51 | do { | |
52 | stat = inb(ps2if->base + PS2_STATUS); | |
53 | cpu_relax(); | |
54 | } while (!(stat & PS2_STAT_TXEMPTY)); | |
55 | ||
56 | outb(val, ps2if->base + PS2_DATA); | |
57 | ||
58 | return 0; | |
59 | } | |
60 | ||
7d12e780 | 61 | static irqreturn_t pcips2_interrupt(int irq, void *devid) |
1da177e4 LT |
62 | { |
63 | struct pcips2_data *ps2if = devid; | |
64 | unsigned char status, scancode; | |
65 | int handled = 0; | |
66 | ||
67 | do { | |
68 | unsigned int flag; | |
69 | ||
70 | status = inb(ps2if->base + PS2_STATUS); | |
71 | if (!(status & PS2_STAT_RXFULL)) | |
72 | break; | |
73 | handled = 1; | |
74 | scancode = inb(ps2if->base + PS2_DATA); | |
75 | if (status == 0xff && scancode == 0xff) | |
76 | break; | |
77 | ||
78 | flag = (status & PS2_STAT_PARITY) ? 0 : SERIO_PARITY; | |
79 | ||
80 | if (hweight8(scancode) & 1) | |
81 | flag ^= SERIO_PARITY; | |
82 | ||
7d12e780 | 83 | serio_interrupt(ps2if->io, scancode, flag); |
1da177e4 LT |
84 | } while (1); |
85 | return IRQ_RETVAL(handled); | |
86 | } | |
87 | ||
88 | static void pcips2_flush_input(struct pcips2_data *ps2if) | |
89 | { | |
90 | unsigned char status, scancode; | |
91 | ||
92 | do { | |
93 | status = inb(ps2if->base + PS2_STATUS); | |
94 | if (!(status & PS2_STAT_RXFULL)) | |
95 | break; | |
96 | scancode = inb(ps2if->base + PS2_DATA); | |
97 | if (status == 0xff && scancode == 0xff) | |
98 | break; | |
99 | } while (1); | |
100 | } | |
101 | ||
102 | static int pcips2_open(struct serio *io) | |
103 | { | |
104 | struct pcips2_data *ps2if = io->port_data; | |
105 | int ret, val = 0; | |
106 | ||
107 | outb(PS2_CTRL_ENABLE, ps2if->base); | |
108 | pcips2_flush_input(ps2if); | |
109 | ||
dace1453 | 110 | ret = request_irq(ps2if->dev->irq, pcips2_interrupt, IRQF_SHARED, |
1da177e4 LT |
111 | "pcips2", ps2if); |
112 | if (ret == 0) | |
113 | val = PS2_CTRL_ENABLE | PS2_CTRL_RXIRQ; | |
114 | ||
115 | outb(val, ps2if->base); | |
116 | ||
117 | return ret; | |
118 | } | |
119 | ||
120 | static void pcips2_close(struct serio *io) | |
121 | { | |
122 | struct pcips2_data *ps2if = io->port_data; | |
123 | ||
124 | outb(0, ps2if->base); | |
125 | ||
126 | free_irq(ps2if->dev->irq, ps2if); | |
127 | } | |
128 | ||
129 | static int __devinit pcips2_probe(struct pci_dev *dev, const struct pci_device_id *id) | |
130 | { | |
131 | struct pcips2_data *ps2if; | |
132 | struct serio *serio; | |
133 | int ret; | |
134 | ||
135 | ret = pci_enable_device(dev); | |
136 | if (ret) | |
137 | goto out; | |
138 | ||
139 | ret = pci_request_regions(dev, "pcips2"); | |
140 | if (ret) | |
141 | goto disable; | |
142 | ||
143 | ps2if = kmalloc(sizeof(struct pcips2_data), GFP_KERNEL); | |
144 | serio = kmalloc(sizeof(struct serio), GFP_KERNEL); | |
145 | if (!ps2if || !serio) { | |
146 | ret = -ENOMEM; | |
147 | goto release; | |
148 | } | |
149 | ||
150 | memset(ps2if, 0, sizeof(struct pcips2_data)); | |
151 | memset(serio, 0, sizeof(struct serio)); | |
152 | ||
153 | serio->id.type = SERIO_8042; | |
154 | serio->write = pcips2_write; | |
155 | serio->open = pcips2_open; | |
156 | serio->close = pcips2_close; | |
157 | strlcpy(serio->name, pci_name(dev), sizeof(serio->name)); | |
158 | strlcpy(serio->phys, dev->dev.bus_id, sizeof(serio->phys)); | |
159 | serio->port_data = ps2if; | |
160 | serio->dev.parent = &dev->dev; | |
161 | ps2if->io = serio; | |
162 | ps2if->dev = dev; | |
163 | ps2if->base = pci_resource_start(dev, 0); | |
164 | ||
165 | pci_set_drvdata(dev, ps2if); | |
166 | ||
167 | serio_register_port(ps2if->io); | |
168 | return 0; | |
169 | ||
170 | release: | |
171 | kfree(ps2if); | |
172 | kfree(serio); | |
173 | pci_release_regions(dev); | |
174 | disable: | |
175 | pci_disable_device(dev); | |
176 | out: | |
177 | return ret; | |
178 | } | |
179 | ||
180 | static void __devexit pcips2_remove(struct pci_dev *dev) | |
181 | { | |
182 | struct pcips2_data *ps2if = pci_get_drvdata(dev); | |
183 | ||
184 | serio_unregister_port(ps2if->io); | |
185 | pci_set_drvdata(dev, NULL); | |
186 | kfree(ps2if); | |
187 | pci_release_regions(dev); | |
188 | pci_disable_device(dev); | |
189 | } | |
190 | ||
191 | static struct pci_device_id pcips2_ids[] = { | |
192 | { | |
193 | .vendor = 0x14f2, /* MOBILITY */ | |
194 | .device = 0x0123, /* Keyboard */ | |
195 | .subvendor = PCI_ANY_ID, | |
196 | .subdevice = PCI_ANY_ID, | |
197 | .class = PCI_CLASS_INPUT_KEYBOARD << 8, | |
198 | .class_mask = 0xffff00, | |
199 | }, | |
200 | { | |
201 | .vendor = 0x14f2, /* MOBILITY */ | |
202 | .device = 0x0124, /* Mouse */ | |
203 | .subvendor = PCI_ANY_ID, | |
204 | .subdevice = PCI_ANY_ID, | |
205 | .class = PCI_CLASS_INPUT_MOUSE << 8, | |
206 | .class_mask = 0xffff00, | |
207 | }, | |
208 | { 0, } | |
209 | }; | |
210 | ||
211 | static struct pci_driver pcips2_driver = { | |
212 | .name = "pcips2", | |
213 | .id_table = pcips2_ids, | |
214 | .probe = pcips2_probe, | |
215 | .remove = __devexit_p(pcips2_remove), | |
216 | }; | |
217 | ||
218 | static int __init pcips2_init(void) | |
219 | { | |
220 | return pci_register_driver(&pcips2_driver); | |
221 | } | |
222 | ||
223 | static void __exit pcips2_exit(void) | |
224 | { | |
225 | pci_unregister_driver(&pcips2_driver); | |
226 | } | |
227 | ||
228 | module_init(pcips2_init); | |
229 | module_exit(pcips2_exit); | |
230 | ||
231 | MODULE_LICENSE("GPL"); | |
232 | MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); | |
233 | MODULE_DESCRIPTION("PCI PS/2 keyboard/mouse driver"); | |
234 | MODULE_DEVICE_TABLE(pci, pcips2_ids); |