Input: Add ACPI-based i8042 keyboard and aux controller enumeration; can be

disabled by passing i8042.noacpi as a boot parameter.

Original code by Bjorn Helgaas <bjorn.helgaas@hp.com>, reworked by
Dmitry Torokhov <dtor@mail.ru>, FixedIO support from Hans-Frieder Vogt
<hfvogt@gmx.net>
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Vojtech Pavlik <vojtech@suse.cz>

Documentation/kernel-parameters.txt

@@ -469,6 +469,8 @@ running once the system is up.
 	i8042.dumbkbd	[HW] Pretend that controlled can only read data from
 			     keyboard and can not control its state
 			     (Don't attempt to blink the leds)
+	i8042.noacpi	[HW] Don't use ACPI to discover KBD/AUX controller
+			     settings
 	i8042.noaux	[HW] Don't check for auxiliary (== mouse) port
 	i8042.nomux	[HW] Don't check presence of an active multiplexing
 			     controller

drivers/input/serio/i8042-io.h

@@ -22,9 +22,6 @@
 #ifdef __alpha__
 # define I8042_KBD_IRQ	1
 # define I8042_AUX_IRQ	(RTC_PORT(0) == 0x170 ? 9 : 12)	/* Jensen is special */
-#elif defined(__ia64__)
-# define I8042_KBD_IRQ isa_irq_to_vector(1)
-# define I8042_AUX_IRQ isa_irq_to_vector(12)
 #elif defined(__arm__)
 /* defined in include/asm-arm/arch-xxx/irqs.h */
 #include <asm/irq.h>
@@ -56,66 +53,32 @@ static inline int i8042_read_status(void)
 static inline void i8042_write_data(int val)
 {
 	outb(val, I8042_DATA_REG);
-	return;
 }
 
 static inline void i8042_write_command(int val)
 {
 	outb(val, I8042_COMMAND_REG);
-	return;
 }
 
-#if defined(__i386__)
-
-#include <linux/dmi.h>
-
-static struct dmi_system_id __initdata i8042_dmi_table[] = {
-	{
-		.ident = "Compaq Proliant 8500",
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
-			DMI_MATCH(DMI_PRODUCT_NAME , "ProLiant"),
-			DMI_MATCH(DMI_PRODUCT_VERSION, "8500"),
-		},
-	},
-	{
-		.ident = "Compaq Proliant DL760",
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
-			DMI_MATCH(DMI_PRODUCT_NAME , "ProLiant"),
-			DMI_MATCH(DMI_PRODUCT_VERSION, "DL760"),
-		},
-	},
-	{ }
-};
-#endif
-
 static inline int i8042_platform_init(void)
 {
 /*
- * On ix86 platforms touching the i8042 data register region can do really
- * bad things. Because of this the region is always reserved on ix86 boxes.
+ * On some platforms touching the i8042 data register region can do really
+ * bad things. Because of this the region is always reserved on such boxes.
  */
-#if !defined(__i386__) && !defined(__sh__) && !defined(__alpha__) && !defined(__x86_64__) && !defined(__mips__)
+#if !defined(__sh__) && !defined(__alpha__) && !defined(__mips__)
 	if (!request_region(I8042_DATA_REG, 16, "i8042"))
 		return -1;
 #endif
 
-#if !defined(__i386__) && !defined(__x86_64__)
         i8042_reset = 1;
-#endif
-
-#if defined(__i386__)
-	if (dmi_check_system(i8042_dmi_table))
-		i8042_noloop = 1;
-#endif
 
 	return 0;
 }
 
 static inline void i8042_platform_exit(void)
 {
-#if !defined(__i386__) && !defined(__sh__) && !defined(__alpha__) && !defined(__x86_64__)
+#if !defined(__sh__) && !defined(__alpha__)
 	release_region(I8042_DATA_REG, 16);
 #endif
 }

drivers/input/serio/i8042-x86ia64io.h

+#ifndef _I8042_X86IA64IO_H
+#define _I8042_X86IA64IO_H
+
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+
+/*
+ * Names.
+ */
+
+#define I8042_KBD_PHYS_DESC "isa0060/serio0"
+#define I8042_AUX_PHYS_DESC "isa0060/serio1"
+#define I8042_MUX_PHYS_DESC "isa0060/serio%d"
+
+/*
+ * IRQs.
+ */
+
+#if defined(__ia64__)
+# define I8042_MAP_IRQ(x)	isa_irq_to_vector((x))
+#else
+# define I8042_MAP_IRQ(x)	(x)
+#endif
+
+#define I8042_KBD_IRQ	i8042_kbd_irq
+#define I8042_AUX_IRQ	i8042_aux_irq
+
+static int i8042_kbd_irq;
+static int i8042_aux_irq;
+
+/*
+ * Register numbers.
+ */
+
+#define I8042_COMMAND_REG	i8042_command_reg
+#define I8042_STATUS_REG	i8042_command_reg
+#define I8042_DATA_REG		i8042_data_reg
+
+static int i8042_command_reg = 0x64;
+static int i8042_data_reg = 0x60;
+
+
+static inline int i8042_read_data(void)
+{
+	return inb(I8042_DATA_REG);
+}
+
+static inline int i8042_read_status(void)
+{
+	return inb(I8042_STATUS_REG);
+}
+
+static inline void i8042_write_data(int val)
+{
+	outb(val, I8042_DATA_REG);
+}
+
+static inline void i8042_write_command(int val)
+{
+	outb(val, I8042_COMMAND_REG);
+}
+
+#if defined(__i386__)
+
+#include <linux/dmi.h>
+
+static struct dmi_system_id __initdata i8042_dmi_table[] = {
+	{
+		.ident = "Compaq Proliant 8500",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
+			DMI_MATCH(DMI_PRODUCT_NAME , "ProLiant"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "8500"),
+		},
+	},
+	{
+		.ident = "Compaq Proliant DL760",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Compaq"),
+			DMI_MATCH(DMI_PRODUCT_NAME , "ProLiant"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "DL760"),
+		},
+	},
+	{ }
+};
+#endif
+
+#ifdef CONFIG_ACPI
+#include <linux/acpi.h>
+#include <acpi/acpi_bus.h>
+
+struct i8042_acpi_resources {
+	unsigned int port1;
+	unsigned int port2;
+	unsigned int irq;
+};
+
+static int i8042_acpi_kbd_registered;
+static int i8042_acpi_aux_registered;
+
+static acpi_status i8042_acpi_parse_resource(struct acpi_resource *res, void *data)
+{
+	struct i8042_acpi_resources *i8042_res = data;
+	struct acpi_resource_io *io;
+	struct acpi_resource_fixed_io *fixed_io;
+	struct acpi_resource_irq *irq;
+	struct acpi_resource_ext_irq *ext_irq;
+
+	switch (res->id) {
+		case ACPI_RSTYPE_IO:
+			io = &res->data.io;
+			if (io->range_length) {
+				if (!i8042_res->port1)
+					i8042_res->port1 = io->min_base_address;
+				else
+					i8042_res->port2 = io->min_base_address;
+			}
+			break;
+
+		case ACPI_RSTYPE_FIXED_IO:
+			fixed_io = &res->data.fixed_io;
+			if (fixed_io->range_length) {
+				if (!i8042_res->port1)
+					i8042_res->port1 = fixed_io->base_address;
+				else
+					i8042_res->port2 = fixed_io->base_address;
+			}
+			break;
+
+		case ACPI_RSTYPE_IRQ:
+			irq = &res->data.irq;
+			if (irq->number_of_interrupts > 0)
+				i8042_res->irq =
+					acpi_register_gsi(irq->interrupts[0],
+							  irq->edge_level,
+							  irq->active_high_low);
+			break;
+
+		case ACPI_RSTYPE_EXT_IRQ:
+			ext_irq = &res->data.extended_irq;
+			if (ext_irq->number_of_interrupts > 0)
+				i8042_res->irq =
+					acpi_register_gsi(ext_irq->interrupts[0],
+							  ext_irq->edge_level,
+							  ext_irq->active_high_low);
+			break;
+	}
+	return AE_OK;
+}
+
+static int i8042_acpi_kbd_add(struct acpi_device *device)
+{
+	struct i8042_acpi_resources kbd_res;
+	acpi_status status;
+
+	memset(&kbd_res, 0, sizeof(kbd_res));
+	status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
+				     i8042_acpi_parse_resource, &kbd_res);
+	if (ACPI_FAILURE(status))
+		return -ENODEV;
+
+	if (kbd_res.port1)
+		i8042_data_reg = kbd_res.port1;
+	else
+		printk(KERN_WARNING "ACPI: [%s] has no data port; default is 0x%x\n",
+			acpi_device_bid(device), i8042_data_reg);
+
+	if (kbd_res.port2)
+		i8042_command_reg = kbd_res.port2;
+	else
+		printk(KERN_WARNING "ACPI: [%s] has no command port; default is 0x%x\n",
+			acpi_device_bid(device), i8042_command_reg);
+
+	if (kbd_res.irq)
+		i8042_kbd_irq = kbd_res.irq;
+	else
+		printk(KERN_WARNING "ACPI: [%s] has no IRQ; default is %d\n",
+			acpi_device_bid(device), i8042_kbd_irq);
+
+	strncpy(acpi_device_name(device), "PS/2 Keyboard Controller",
+		sizeof(acpi_device_name(device)));
+	printk("ACPI: %s [%s] at I/O 0x%x, 0x%x, irq %d\n",
+		acpi_device_name(device), acpi_device_bid(device),
+		i8042_data_reg, i8042_command_reg, i8042_kbd_irq);
+
+	return 0;
+}
+
+static int i8042_acpi_aux_add(struct acpi_device *device)
+{
+	struct i8042_acpi_resources aux_res;
+	acpi_status status;
+
+	memset(&aux_res, 0, sizeof(aux_res));
+	status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
+				     i8042_acpi_parse_resource, &aux_res);
+	if (ACPI_FAILURE(status))
+		return -ENODEV;
+
+	if (aux_res.irq)
+		i8042_aux_irq = aux_res.irq;
+	else
+		printk(KERN_WARNING "ACPI: [%s] has no IRQ; default is %d\n",
+			acpi_device_bid(device), i8042_aux_irq);
+
+	strncpy(acpi_device_name(device), "PS/2 Mouse Controller",
+		sizeof(acpi_device_name(device)));
+	printk("ACPI: %s [%s] at irq %d\n",
+		acpi_device_name(device), acpi_device_bid(device), i8042_aux_irq);
+
+	return 0;
+}
+
+static struct acpi_driver i8042_acpi_kbd_driver = {
+	.name		= "i8042",
+	.ids		= "PNP0303",
+	.ops		= {
+		.add		= i8042_acpi_kbd_add,
+	},
+};
+
+static struct acpi_driver i8042_acpi_aux_driver = {
+	.name		= "i8042",
+	.ids		= "PNP0F13",
+	.ops		= {
+		.add		= i8042_acpi_aux_add,
+	},
+};
+
+static int i8042_acpi_init(void)
+{
+	int result;
+
+	if (acpi_disabled || i8042_noacpi) {
+		printk("i8042: ACPI detection disabled\n");
+		return 0;
+	}
+
+	result = acpi_bus_register_driver(&i8042_acpi_kbd_driver);
+	if (result < 0)
+		return result;
+
+	if (result == 0) {
+		acpi_bus_unregister_driver(&i8042_acpi_kbd_driver);
+		return -ENODEV;
+	}
+	i8042_acpi_kbd_registered = 1;
+
+	result = acpi_bus_register_driver(&i8042_acpi_aux_driver);
+	if (result >= 0)
+		i8042_acpi_aux_registered = 1;
+	if (result == 0)
+		i8042_noaux = 1;
+
+	return 0;
+}
+
+static void i8042_acpi_exit(void)
+{
+	if (i8042_acpi_kbd_registered)
+		acpi_bus_unregister_driver(&i8042_acpi_kbd_driver);
+
+	if (i8042_acpi_aux_registered)
+		acpi_bus_unregister_driver(&i8042_acpi_aux_driver);
+}
+#endif
+
+static inline int i8042_platform_init(void)
+{
+/*
+ * On ix86 platforms touching the i8042 data register region can do really
+ * bad things. Because of this the region is always reserved on ix86 boxes.
+ *
+ *	if (!request_region(I8042_DATA_REG, 16, "i8042"))
+ *		return -1;
+ */
+
+	i8042_kbd_irq = I8042_MAP_IRQ(1);
+	i8042_aux_irq = I8042_MAP_IRQ(12);
+
+#ifdef CONFIG_ACPI
+	if (i8042_acpi_init())
+		return -1;
+#endif
+
+#if defined(__ia64__)
+        i8042_reset = 1;
+#endif
+
+#if defined(__i386__)
+	if (dmi_check_system(i8042_dmi_table))
+		i8042_noloop = 1;
+#endif
+
+	return 0;
+}
+
+static inline void i8042_platform_exit(void)
+{
+#ifdef CONFIG_ACPI
+	i8042_acpi_exit();
+#endif
+}
+
+#endif /* _I8042_X86IA64IO_H */

drivers/input/serio/i8042.c

@@ -57,6 +57,12 @@ static unsigned int i8042_noloop;
 module_param_named(noloop, i8042_noloop, bool, 0);
 MODULE_PARM_DESC(dumbkbd, "Disable the AUX Loopback command while probing for the AUX port");
 
+#ifdef CONFIG_ACPI
+static int i8042_noacpi;
+module_param_named(noacpi, i8042_noacpi, bool, 0);
+MODULE_PARM_DESC(noacpi, "Do not use ACPI to detect controller settings");
+#endif
+
 __obsolete_setup("i8042_noaux");
 __obsolete_setup("i8042_nomux");
 __obsolete_setup("i8042_unlock");

drivers/input/serio/i8042.h

@@ -23,6 +23,8 @@
 #include "i8042-ppcio.h"
 #elif defined(CONFIG_SPARC32) || defined(CONFIG_SPARC64)
 #include "i8042-sparcio.h"
+#elif defined(CONFIG_X86) || defined(CONFIG_IA64)
+#include "i8042-x86ia64io.h"
 #else
 #include "i8042-io.h"
 #endif