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->driver;
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->driver;
107 outb(PS2_CTRL_ENABLE, ps2if->base);
108 pcips2_flush_input(ps2if);
110 ret = request_irq(ps2if->dev->irq, pcips2_interrupt, SA_SHIRQ,
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->driver;
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;
134 ret = pci_enable_device(dev);
138 if (!request_region(pci_resource_start(dev, 0),
139 pci_resource_len(dev, 0), "pcips2")) {
144 ps2if = kmalloc(sizeof(struct pcips2_data), GFP_KERNEL);
150 memset(ps2if, 0, sizeof(struct pcips2_data));
152 ps2if->io.type = SERIO_8042;
153 ps2if->io.write = pcips2_write;
154 ps2if->io.open = pcips2_open;
155 ps2if->io.close = pcips2_close;
156 ps2if->io.name = pci_name(dev);
157 ps2if->io.phys = dev->dev.bus_id;
158 ps2if->io.driver = ps2if;
160 ps2if->base = pci_resource_start(dev, 0);
162 pci_set_drvdata(dev, ps2if);
164 serio_register_port(&ps2if->io);
168 release_region(pci_resource_start(dev, 0),
169 pci_resource_len(dev, 0));
171 pci_disable_device(dev);
175 static void __devexit pcips2_remove(struct pci_dev *dev)
177 struct pcips2_data *ps2if = pci_get_drvdata(dev);
179 serio_unregister_port(&ps2if->io);
180 release_region(pci_resource_start(dev, 0),
181 pci_resource_len(dev, 0));
182 pci_set_drvdata(dev, NULL);
184 pci_disable_device(dev);
187 static struct pci_device_id pcips2_ids[] = {
189 .vendor = 0x14f2, /* MOBILITY */
190 .device = 0x0123, /* Keyboard */
191 .subvendor = PCI_ANY_ID,
192 .subdevice = PCI_ANY_ID,
193 .class = PCI_CLASS_INPUT_KEYBOARD << 8,
194 .class_mask = 0xffff00,
197 .vendor = 0x14f2, /* MOBILITY */
198 .device = 0x0124, /* Mouse */
199 .subvendor = PCI_ANY_ID,
200 .subdevice = PCI_ANY_ID,
201 .class = PCI_CLASS_INPUT_MOUSE << 8,
202 .class_mask = 0xffff00,
207 static struct pci_driver pcips2_driver = {
209 .id_table = pcips2_ids,
210 .probe = pcips2_probe,
211 .remove = __devexit_p(pcips2_remove),
214 static int __init pcips2_init(void)
216 return pci_module_init(&pcips2_driver);
219 static void __exit pcips2_exit(void)
221 pci_unregister_driver(&pcips2_driver);
224 module_init(pcips2_init);
225 module_exit(pcips2_exit);
227 MODULE_LICENSE("GPL");
228 MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
229 MODULE_DESCRIPTION("PCI PS/2 keyboard/mouse driver");
230 MODULE_DEVICE_TABLE(pci, pcips2_ids);