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, struct pt_regs *regs)
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, regs);
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 = kmalloc(sizeof(struct pcips2_data), GFP_KERNEL);
144 serio = kmalloc(sizeof(struct serio), GFP_KERNEL);
145 if (!ps2if || !serio) {
150 memset(ps2if, 0, sizeof(struct pcips2_data));
151 memset(serio, 0, sizeof(struct serio));
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;
163 ps2if->base = pci_resource_start(dev, 0);
165 pci_set_drvdata(dev, ps2if);
167 serio_register_port(ps2if->io);
173 pci_release_regions(dev);
175 pci_disable_device(dev);
180 static void __devexit pcips2_remove(struct pci_dev *dev)
182 struct pcips2_data *ps2if = pci_get_drvdata(dev);
184 serio_unregister_port(ps2if->io);
185 pci_set_drvdata(dev, NULL);
187 pci_release_regions(dev);
188 pci_disable_device(dev);
191 static struct pci_device_id pcips2_ids[] = {
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,
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,
211 static struct pci_driver pcips2_driver = {
213 .id_table = pcips2_ids,
214 .probe = pcips2_probe,
215 .remove = __devexit_p(pcips2_remove),
218 static int __init pcips2_init(void)
220 return pci_register_driver(&pcips2_driver);
223 static void __exit pcips2_exit(void)
225 pci_unregister_driver(&pcips2_driver);
228 module_init(pcips2_init);
229 module_exit(pcips2_exit);
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);