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Subject[patch] input: Add PCI PS/2 controller support [5/13]

You can pull this changeset from:
bk://kernel.bkbits.net/vojtech/input

===================================================================
ChangeSet@1.1215.104.22, 2003-06-09 14:02:05+02:00, rmk@arm.linux.org.uk
input: PCI PS/2 keyboard and mouse controller (Mobility Docking station)


Kconfig | 11 +++
Makefile | 1
pcips2.c | 230 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 242 insertions(+)
===================================================================
diff -Nru a/drivers/input/serio/Kconfig b/drivers/input/serio/Kconfig
--- a/drivers/input/serio/Kconfig Sat Jun 14 22:22:39 2003
+++ b/drivers/input/serio/Kconfig Sat Jun 14 22:22:39 2003
@@ -119,3 +119,14 @@
The module will be called rpckbd.o. If you want to compile it as a
module, say M here and read <file:Documentation/modules.txt>.

+config SERIO_PCIPS2
+ tristate "PCI PS/2 keyboard and PS/2 mouse controller"
+ depends on PCI && SERIO
+ help
+ Say Y here if you have a Mobility Docking station with PS/2
+ keyboard and mice ports.
+
+ This driver is also available as a module ( = code which can be
+ inserted in and removed from the running kernel whenever you want).
+ The module will be called rpckbd. If you want to compile it as a
+ module, say M here and read <file:Documentation/modules.txt>.
diff -Nru a/drivers/input/serio/Makefile b/drivers/input/serio/Makefile
--- a/drivers/input/serio/Makefile Sat Jun 14 22:22:39 2003
+++ b/drivers/input/serio/Makefile Sat Jun 14 22:22:39 2003
@@ -14,3 +14,4 @@
obj-$(CONFIG_SERIO_AMBAKMI) += ambakmi.o
obj-$(CONFIG_SERIO_Q40KBD) += q40kbd.o
obj-$(CONFIG_SERIO_98KBD) += 98kbd-io.o
+obj-$(CONFIG_SERIO_PCIPS2) += pcips2.o
diff -Nru a/drivers/input/serio/pcips2.c b/drivers/input/serio/pcips2.c
--- /dev/null Wed Dec 31 16:00:00 1969
+++ b/drivers/input/serio/pcips2.c Sat Jun 14 22:22:39 2003
@@ -0,0 +1,230 @@
+/*
+ * linux/drivers/input/serio/pcips2.c
+ *
+ * Copyright (C) 2003 Russell King, All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License.
+ *
+ * I'm not sure if this is a generic PS/2 PCI interface or specific to
+ * the Mobility Electronics docking station.
+ */
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/input.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/serio.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+
+#define PS2_CTRL (0)
+#define PS2_STATUS (1)
+#define PS2_DATA (2)
+
+#define PS2_CTRL_CLK (1<<0)
+#define PS2_CTRL_DAT (1<<1)
+#define PS2_CTRL_TXIRQ (1<<2)
+#define PS2_CTRL_ENABLE (1<<3)
+#define PS2_CTRL_RXIRQ (1<<4)
+
+#define PS2_STAT_CLK (1<<0)
+#define PS2_STAT_DAT (1<<1)
+#define PS2_STAT_PARITY (1<<2)
+#define PS2_STAT_RXFULL (1<<5)
+#define PS2_STAT_TXBUSY (1<<6)
+#define PS2_STAT_TXEMPTY (1<<7)
+
+struct pcips2_data {
+ struct serio io;
+ unsigned int base;
+ struct pci_dev *dev;
+};
+
+static int pcips2_write(struct serio *io, unsigned char val)
+{
+ struct pcips2_data *ps2if = io->driver;
+ unsigned int stat;
+
+ do {
+ stat = inb(ps2if->base + PS2_STATUS);
+ cpu_relax();
+ } while (!(stat & PS2_STAT_TXEMPTY));
+
+ outb(val, ps2if->base + PS2_DATA);
+
+ return 0;
+}
+
+static void pcips2_interrupt(int irq, void *devid, struct pt_regs *regs)
+{
+ struct pcips2_data *ps2if = devid;
+ unsigned char status, scancode;
+
+ do {
+ unsigned int flag;
+
+ status = inb(ps2if->base + PS2_STATUS);
+ if (!(status & PS2_STAT_RXFULL))
+ break;
+ scancode = inb(ps2if->base + PS2_DATA);
+ if (status == 0xff && scancode == 0xff)
+ break;
+
+ flag = (status & PS2_STAT_PARITY) ? 0 : SERIO_PARITY;
+
+ if (hweight8(scancode) & 1)
+ flag ^= SERIO_PARITY;
+
+ serio_interrupt(&ps2if->io, scancode, flag, regs);
+ } while (1);
+}
+
+static void pcips2_flush_input(struct pcips2_data *ps2if)
+{
+ unsigned char status, scancode;
+
+ do {
+ status = inb(ps2if->base + PS2_STATUS);
+ if (!(status & PS2_STAT_RXFULL))
+ break;
+ scancode = inb(ps2if->base + PS2_DATA);
+ if (status == 0xff && scancode == 0xff)
+ break;
+ } while (1);
+}
+
+static int pcips2_open(struct serio *io)
+{
+ struct pcips2_data *ps2if = io->driver;
+ int ret, val = 0;
+
+ outb(PS2_CTRL_ENABLE, ps2if->base);
+ pcips2_flush_input(ps2if);
+
+ ret = request_irq(ps2if->dev->irq, pcips2_interrupt, SA_SHIRQ,
+ "pcips2", ps2if);
+ if (ret == 0)
+ val = PS2_CTRL_ENABLE | PS2_CTRL_RXIRQ;
+
+ outb(val, ps2if->base);
+
+ return ret;
+}
+
+static void pcips2_close(struct serio *io)
+{
+ struct pcips2_data *ps2if = io->driver;
+
+ outb(0, ps2if->base);
+
+ free_irq(ps2if->dev->irq, ps2if);
+}
+
+static int __devinit pcips2_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ struct pcips2_data *ps2if;
+ int ret;
+
+ ret = pci_enable_device(dev);
+ if (ret)
+ return ret;
+
+ if (!request_region(pci_resource_start(dev, 0),
+ pci_resource_len(dev, 0), "pcips2")) {
+ ret = -EBUSY;
+ goto disable;
+ }
+
+ ps2if = kmalloc(sizeof(struct pcips2_data), GFP_KERNEL);
+ if (!ps2if) {
+ ret = -ENOMEM;
+ goto release;
+ }
+
+ memset(ps2if, 0, sizeof(struct pcips2_data));
+
+ ps2if->io.type = SERIO_8042;
+ ps2if->io.write = pcips2_write;
+ ps2if->io.open = pcips2_open;
+ ps2if->io.close = pcips2_close;
+ ps2if->io.name = dev->dev.name;
+ ps2if->io.phys = dev->dev.bus_id;
+ ps2if->io.driver = ps2if;
+ ps2if->dev = dev;
+ ps2if->base = pci_resource_start(dev, 0);
+
+ pci_set_drvdata(dev, ps2if);
+
+ serio_register_port(&ps2if->io);
+ return 0;
+
+ release:
+ release_region(pci_resource_start(dev, 0),
+ pci_resource_len(dev, 0));
+ disable:
+ pci_disable_device(dev);
+ return ret;
+}
+
+static void __devexit pcips2_remove(struct pci_dev *dev)
+{
+ struct pcips2_data *ps2if = pci_get_drvdata(dev);
+
+ serio_unregister_port(&ps2if->io);
+ release_region(pci_resource_start(dev, 0),
+ pci_resource_len(dev, 0));
+ pci_set_drvdata(dev, NULL);
+ kfree(ps2if);
+ pci_disable_device(dev);
+}
+
+static struct pci_device_id pcips2_ids[] = {
+ {
+ .vendor = 0x14f2, /* MOBILITY */
+ .device = 0x0123, /* Keyboard */
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .class = PCI_CLASS_INPUT_KEYBOARD << 8,
+ .class_mask = 0xffff00,
+ },
+ {
+ .vendor = 0x14f2, /* MOBILITY */
+ .device = 0x0124, /* Mouse */
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .class = PCI_CLASS_INPUT_MOUSE << 8,
+ .class_mask = 0xffff00,
+ },
+ { 0, }
+};
+
+static struct pci_driver pcips2_driver = {
+ .name = "pcips2",
+ .id_table = pcips2_ids,
+ .probe = pcips2_probe,
+ .remove = __devexit_p(pcips2_remove),
+ .driver = {
+ .devclass = &input_devclass,
+ },
+};
+
+static int __init pcips2_init(void)
+{
+ return pci_module_init(&pcips2_driver);
+}
+
+static void __exit pcips2_exit(void)
+{
+ pci_unregister_driver(&pcips2_driver);
+}
+
+module_init(pcips2_init);
+module_exit(pcips2_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
+MODULE_DESCRIPTION("PCI PS/2 keyboard/mouse driver");
+MODULE_DEVICE_TABLE(pci, pcips2_ids);
-
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