2 * linux/drivers/input/serio/pcips2.c
4 * Copyright (C) 2003 Russell King, All Rights Reserved.
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.
10 * I'm not sure if this is a generic PS/2 PCI interface or specific to
11 * the Mobility Electronics docking station.
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>
24 #define PS2_STATUS (1)
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)
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)
46 static int pcips2_write(struct serio *io, unsigned char val)
48 struct pcips2_data *ps2if = io->port_data;
52 stat = inb(ps2if->base + PS2_STATUS);
54 } while (!(stat & PS2_STAT_TXEMPTY));
56 outb(val, ps2if->base + PS2_DATA);
61 static irqreturn_t pcips2_interrupt(int irq, void *devid)
63 struct pcips2_data *ps2if = devid;
64 unsigned char status, scancode;
70 status = inb(ps2if->base + PS2_STATUS);
71 if (!(status & PS2_STAT_RXFULL))
74 scancode = inb(ps2if->base + PS2_DATA);
75 if (status == 0xff && scancode == 0xff)
78 flag = (status & PS2_STAT_PARITY) ? 0 : SERIO_PARITY;
80 if (hweight8(scancode) & 1)
83 serio_interrupt(ps2if->io, scancode, flag);
85 return IRQ_RETVAL(handled);
88 static void pcips2_flush_input(struct pcips2_data *ps2if)
90 unsigned char status, scancode;
93 status = inb(ps2if->base + PS2_STATUS);
94 if (!(status & PS2_STAT_RXFULL))
96 scancode = inb(ps2if->base + PS2_DATA);
97 if (status == 0xff && scancode == 0xff)
102 static int pcips2_open(struct serio *io)
104 struct pcips2_data *ps2if = io->port_data;
107 outb(PS2_CTRL_ENABLE, ps2if->base);
108 pcips2_flush_input(ps2if);
110 ret = request_irq(ps2if->dev->irq, pcips2_interrupt, IRQF_SHARED,
113 val = PS2_CTRL_ENABLE | PS2_CTRL_RXIRQ;
115 outb(val, ps2if->base);
120 static void pcips2_close(struct serio *io)
122 struct pcips2_data *ps2if = io->port_data;
124 outb(0, ps2if->base);
126 free_irq(ps2if->dev->irq, ps2if);
129 static int __devinit pcips2_probe(struct pci_dev *dev, const struct pci_device_id *id)
131 struct pcips2_data *ps2if;
135 ret = pci_enable_device(dev);
139 ret = pci_request_regions(dev, "pcips2");
143 ps2if = kzalloc(sizeof(struct pcips2_data), GFP_KERNEL);
144 serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
145 if (!ps2if || !serio) {
151 serio->id.type = SERIO_8042;
152 serio->write = pcips2_write;
153 serio->open = pcips2_open;
154 serio->close = pcips2_close;
155 strlcpy(serio->name, pci_name(dev), sizeof(serio->name));
156 strlcpy(serio->phys, dev->dev.bus_id, sizeof(serio->phys));
157 serio->port_data = ps2if;
158 serio->dev.parent = &dev->dev;
161 ps2if->base = pci_resource_start(dev, 0);
163 pci_set_drvdata(dev, ps2if);
165 serio_register_port(ps2if->io);
171 pci_release_regions(dev);
173 pci_disable_device(dev);
178 static void __devexit pcips2_remove(struct pci_dev *dev)
180 struct pcips2_data *ps2if = pci_get_drvdata(dev);
182 serio_unregister_port(ps2if->io);
183 pci_set_drvdata(dev, NULL);
185 pci_release_regions(dev);
186 pci_disable_device(dev);
189 static struct pci_device_id pcips2_ids[] = {
191 .vendor = 0x14f2, /* MOBILITY */
192 .device = 0x0123, /* Keyboard */
193 .subvendor = PCI_ANY_ID,
194 .subdevice = PCI_ANY_ID,
195 .class = PCI_CLASS_INPUT_KEYBOARD << 8,
196 .class_mask = 0xffff00,
199 .vendor = 0x14f2, /* MOBILITY */
200 .device = 0x0124, /* Mouse */
201 .subvendor = PCI_ANY_ID,
202 .subdevice = PCI_ANY_ID,
203 .class = PCI_CLASS_INPUT_MOUSE << 8,
204 .class_mask = 0xffff00,
209 static struct pci_driver pcips2_driver = {
211 .id_table = pcips2_ids,
212 .probe = pcips2_probe,
213 .remove = __devexit_p(pcips2_remove),
216 static int __init pcips2_init(void)
218 return pci_register_driver(&pcips2_driver);
221 static void __exit pcips2_exit(void)
223 pci_unregister_driver(&pcips2_driver);
226 module_init(pcips2_init);
227 module_exit(pcips2_exit);
229 MODULE_LICENSE("GPL");
230 MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
231 MODULE_DESCRIPTION("PCI PS/2 keyboard/mouse driver");
232 MODULE_DEVICE_TABLE(pci, pcips2_ids);