module_param_named(notimeout, i8042_notimeout, bool, 0);
MODULE_PARM_DESC(notimeout, "Ignore timeouts signalled by i8042");
+static bool i8042_kbdreset;
+module_param_named(kbdreset, i8042_kbdreset, bool, 0);
+MODULE_PARM_DESC(kbdreset, "Reset device connected to KBD port");
+
#ifdef CONFIG_X86
static bool i8042_dritek;
module_param_named(dritek, i8042_dritek, bool, 0);
{
struct i8042_port *port = serio->port_data;
+ spin_lock_irq(&i8042_lock);
port->exists = true;
- mb();
+ spin_unlock_irq(&i8042_lock);
+
return 0;
}
{
struct i8042_port *port = serio->port_data;
+ spin_lock_irq(&i8042_lock);
port->exists = false;
+ port->serio = NULL;
+ spin_unlock_irq(&i8042_lock);
/*
+ * We need to make sure that interrupt handler finishes using
+ * our serio port before we return from this function.
* We synchronize with both AUX and KBD IRQs because there is
* a (very unlikely) chance that AUX IRQ is raised for KBD port
* and vice versa.
*/
synchronize_irq(I8042_AUX_IRQ);
synchronize_irq(I8042_KBD_IRQ);
- port->serio = NULL;
}
/*
spin_unlock_irqrestore(&i8042_lock, flags);
- if (likely(port->exists && !filtered))
+ if (likely(serio && !filtered))
serio_interrupt(serio, data, dfl);
out:
if (i8042_toggle_aux(true))
return -1;
+/*
+ * Reset keyboard (needed on some laptops to successfully detect
+ * touchpad, e.g., some Gigabyte laptop models with Elantech
+ * touchpads).
+ */
+ if (i8042_kbdreset) {
+ pr_warn("Attempting to reset device connected to KBD port\n");
+ i8042_kbd_write(NULL, (unsigned char) 0xff);
+ }
+
/*
* Test AUX IRQ delivery to make sure BIOS did not grab the IRQ and
* used it for a PCI card or somethig else.
* Reset the controller and reset CRT to the original value set by BIOS.
*/
-static void i8042_controller_reset(void)
+static void i8042_controller_reset(bool force_reset)
{
i8042_flush();
* Reset the controller if requested.
*/
- if (i8042_reset)
+ if (i8042_reset || force_reset)
i8042_controller_selftest();
/*
* upsetting it.
*/
-static int i8042_pm_reset(struct device *dev)
+static int i8042_pm_suspend(struct device *dev)
{
- i8042_controller_reset();
+ i8042_controller_reset(true);
return 0;
}
return 0;
}
+static int i8042_pm_reset(struct device *dev)
+{
+ i8042_controller_reset(false);
+
+ return 0;
+}
+
static int i8042_pm_restore(struct device *dev)
{
return i8042_controller_resume(false);
}
static const struct dev_pm_ops i8042_pm_ops = {
- .suspend = i8042_pm_reset,
+ .suspend = i8042_pm_suspend,
.resume = i8042_pm_resume,
.thaw = i8042_pm_thaw,
.poweroff = i8042_pm_reset,
static void i8042_shutdown(struct platform_device *dev)
{
- i8042_controller_reset();
+ i8042_controller_reset(false);
}
static int __init i8042_create_kbd_port(void)
serio->start = i8042_start;
serio->stop = i8042_stop;
serio->close = i8042_port_close;
+ serio->ps2_cmd_mutex = &i8042_mutex;
serio->port_data = port;
serio->dev.parent = &i8042_platform_device->dev;
strlcpy(serio->name, "i8042 KBD port", sizeof(serio->name));
serio->write = i8042_aux_write;
serio->start = i8042_start;
serio->stop = i8042_stop;
+ serio->ps2_cmd_mutex = &i8042_mutex;
serio->port_data = port;
serio->dev.parent = &i8042_platform_device->dev;
if (idx < 0) {
}
}
-/*
- * Checks whether port belongs to i8042 controller.
- */
-bool i8042_check_port_owner(const struct serio *port)
-{
- int i;
-
- for (i = 0; i < I8042_NUM_PORTS; i++)
- if (i8042_ports[i].serio == port)
- return true;
-
- return false;
-}
-EXPORT_SYMBOL(i8042_check_port_owner);
-
static void i8042_free_irqs(void)
{
if (i8042_aux_irq_registered)
out_fail:
i8042_free_aux_ports(); /* in case KBD failed but AUX not */
i8042_free_irqs();
- i8042_controller_reset();
+ i8042_controller_reset(false);
i8042_platform_device = NULL;
return error;
{
i8042_unregister_ports();
i8042_free_irqs();
- i8042_controller_reset();
+ i8042_controller_reset(false);
i8042_platform_device = NULL;
return 0;