#include <linux/init.h>
#include <linux/serio.h>
#include <linux/interrupt.h>
+#include <linux/err.h>
#include <asm/bitops.h>
#include <asm/io.h>
MODULE_DESCRIPTION("Q40 PS/2 keyboard controller driver");
MODULE_LICENSE("GPL");
-static struct serio q40kbd_port =
-{
- .type = SERIO_8042,
- .name = "Q40 kbd port",
- .phys = "Q40",
- .write = NULL,
-};
-
-static irqreturn_t q40kbd_interrupt(int irq, void *dev_id,
- struct pt_regs *regs)
+spinlock_t q40kbd_lock = SPIN_LOCK_UNLOCKED;
+static struct serio *q40kbd_port;
+static struct platform_device *q40kbd_device;
+
+static irqreturn_t q40kbd_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
+ unsigned long flags;
+
+ spin_lock_irqsave(&q40kbd_lock, flags);
+
if (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG))
- serio_interrupt(&q40kbd_port, master_inb(KEYCODE_REG), 0, regs);
+ serio_interrupt(q40kbd_port, master_inb(KEYCODE_REG), 0, regs);
master_outb(-1, KEYBOARD_UNLOCK_REG);
+
+ spin_unlock_irqrestore(&q40kbd_lock, flags);
+
return IRQ_HANDLED;
}
-static int __init q40kbd_init(void)
+/*
+ * q40kbd_flush() flushes all data that may be in the keyboard buffers
+ */
+
+static void q40kbd_flush(void)
+{
+ int maxread = 100;
+ unsigned long flags;
+
+ spin_lock_irqsave(&q40kbd_lock, flags);
+
+ while (maxread-- && (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG)))
+ master_inb(KEYCODE_REG);
+
+ spin_unlock_irqrestore(&q40kbd_lock, flags);
+}
+
+/*
+ * q40kbd_open() is called when a port is open by the higher layer.
+ * It allocates the interrupt and enables in in the chip.
+ */
+
+static int q40kbd_open(struct serio *port)
{
- int maxread = 100;
+ q40kbd_flush();
+ if (request_irq(Q40_IRQ_KEYBOARD, q40kbd_interrupt, 0, "q40kbd", NULL)) {
+ printk(KERN_ERR "q40kbd.c: Can't get irq %d.\n", Q40_IRQ_KEYBOARD);
+ return -1;
+ }
+
+ /* off we go */
+ master_outb(-1, KEYBOARD_UNLOCK_REG);
+ master_outb(1, KEY_IRQ_ENABLE_REG);
+
+ return 0;
+}
+
+static void q40kbd_close(struct serio *port)
+{
+ master_outb(0, KEY_IRQ_ENABLE_REG);
+ master_outb(-1, KEYBOARD_UNLOCK_REG);
+ free_irq(Q40_IRQ_KEYBOARD, NULL);
+
+ q40kbd_flush();
+}
+
+static struct serio * __init q40kbd_allocate_port(void)
+{
+ struct serio *serio;
+
+ serio = kmalloc(sizeof(struct serio), GFP_KERNEL);
+ if (serio) {
+ memset(serio, 0, sizeof(struct serio));
+ serio->type = SERIO_8042;
+ serio->open = q40kbd_open;
+ serio->close = q40kbd_close;
+ serio->dev.parent = &q40kbd_device->dev;
+ strlcpy(serio->name, "Q40 Kbd Port", sizeof(serio->name));
+ strlcpy(serio->phys, "Q40", sizeof(serio->phys));
+ }
+
+ return serio;
+}
+
+static int __init q40kbd_init(void)
+{
if (!MACH_IS_Q40)
return -EIO;
- /* allocate the IRQ */
- request_irq(Q40_IRQ_KEYBOARD, q40kbd_interrupt, 0, "q40kbd", NULL);
-
- /* flush any pending input */
- while (maxread-- && (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG)))
- master_inb(KEYCODE_REG);
+ q40kbd_device = platform_device_register_simple("q40kbd", -1, NULL, 0);
+ if (IS_ERR(q40kbd_device))
+ return PTR_ERR(q40kbd_device);
- /* off we go */
- master_outb(-1,KEYBOARD_UNLOCK_REG);
- master_outb(1,KEY_IRQ_ENABLE_REG);
+ if (!(q40kbd_port = q40kbd_allocate_port())) {
+ platform_device_unregister(q40kbd_device);
+ return -ENOMEM;
+ }
- serio_register_port(&q40kbd_port);
+ serio_register_port(q40kbd_port);
printk(KERN_INFO "serio: Q40 kbd registered\n");
return 0;
static void __exit q40kbd_exit(void)
{
- master_outb(0,KEY_IRQ_ENABLE_REG);
- master_outb(-1,KEYBOARD_UNLOCK_REG);
-
- serio_unregister_port(&q40kbd_port);
- free_irq(Q40_IRQ_KEYBOARD, NULL);
+ serio_unregister_port(q40kbd_port);
+ platform_device_unregister(q40kbd_device);
}
module_init(q40kbd_init);