linux/drivers/platform/x86/intel_oaktrail.c
Lv Zheng 8b48463f89 ACPI: Clean up inclusions of ACPI header files
Replace direct inclusions of <acpi/acpi.h>, <acpi/acpi_bus.h> and
<acpi/acpi_drivers.h>, which are incorrect, with <linux/acpi.h>
inclusions and remove some inclusions of those files that aren't
necessary.

First of all, <acpi/acpi.h>, <acpi/acpi_bus.h> and <acpi/acpi_drivers.h>
should not be included directly from any files that are built for
CONFIG_ACPI unset, because that generally leads to build warnings about
undefined symbols in !CONFIG_ACPI builds.  For CONFIG_ACPI set,
<linux/acpi.h> includes those files and for CONFIG_ACPI unset it
provides stub ACPI symbols to be used in that case.

Second, there are ordering dependencies between those files that always
have to be met.  Namely, it is required that <acpi/acpi_bus.h> be included
prior to <acpi/acpi_drivers.h> so that the acpi_pci_root declarations the
latter depends on are always there.  And <acpi/acpi.h> which provides
basic ACPICA type declarations should always be included prior to any other
ACPI headers in CONFIG_ACPI builds.  That also is taken care of including
<linux/acpi.h> as appropriate.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com> (drivers/pci stuff)
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> (Xen stuff)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-12-07 01:03:14 +01:00

395 lines
9.5 KiB
C

/*
* intel_oaktrail.c - Intel OakTrail Platform support.
*
* Copyright (C) 2010-2011 Intel Corporation
* Author: Yin Kangkai (kangkai.yin@intel.com)
*
* based on Compal driver, Copyright (C) 2008 Cezary Jackiewicz
* <cezary.jackiewicz (at) gmail.com>, based on MSI driver
* Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de>
*
* 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, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* This driver does below things:
* 1. registers itself in the Linux backlight control in
* /sys/class/backlight/intel_oaktrail/
*
* 2. registers in the rfkill subsystem here: /sys/class/rfkill/rfkillX/
* for these components: wifi, bluetooth, wwan (3g), gps
*
* This driver might work on other products based on Oaktrail. If you
* want to try it you can pass force=1 as argument to the module which
* will force it to load even when the DMI data doesn't identify the
* product as compatible.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/fb.h>
#include <linux/mutex.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/backlight.h>
#include <linux/platform_device.h>
#include <linux/dmi.h>
#include <linux/rfkill.h>
#define DRIVER_NAME "intel_oaktrail"
#define DRIVER_VERSION "0.4ac1"
/*
* This is the devices status address in EC space, and the control bits
* definition:
*
* (1 << 0): Camera enable/disable, RW.
* (1 << 1): Bluetooth enable/disable, RW.
* (1 << 2): GPS enable/disable, RW.
* (1 << 3): WiFi enable/disable, RW.
* (1 << 4): WWAN (3G) enable/disalbe, RW.
* (1 << 5): Touchscreen enable/disable, Read Only.
*/
#define OT_EC_DEVICE_STATE_ADDRESS 0xD6
#define OT_EC_CAMERA_MASK (1 << 0)
#define OT_EC_BT_MASK (1 << 1)
#define OT_EC_GPS_MASK (1 << 2)
#define OT_EC_WIFI_MASK (1 << 3)
#define OT_EC_WWAN_MASK (1 << 4)
#define OT_EC_TS_MASK (1 << 5)
/*
* This is the address in EC space and commands used to control LCD backlight:
*
* Two steps needed to change the LCD backlight:
* 1. write the backlight percentage into OT_EC_BL_BRIGHTNESS_ADDRESS;
* 2. write OT_EC_BL_CONTROL_ON_DATA into OT_EC_BL_CONTROL_ADDRESS.
*
* To read the LCD back light, just read out the value from
* OT_EC_BL_BRIGHTNESS_ADDRESS.
*
* LCD backlight brightness range: 0 - 100 (OT_EC_BL_BRIGHTNESS_MAX)
*/
#define OT_EC_BL_BRIGHTNESS_ADDRESS 0x44
#define OT_EC_BL_BRIGHTNESS_MAX 100
#define OT_EC_BL_CONTROL_ADDRESS 0x3A
#define OT_EC_BL_CONTROL_ON_DATA 0x1A
static bool force;
module_param(force, bool, 0);
MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");
static struct platform_device *oaktrail_device;
static struct backlight_device *oaktrail_bl_device;
static struct rfkill *bt_rfkill;
static struct rfkill *gps_rfkill;
static struct rfkill *wifi_rfkill;
static struct rfkill *wwan_rfkill;
/* rfkill */
static int oaktrail_rfkill_set(void *data, bool blocked)
{
u8 value;
u8 result;
unsigned long radio = (unsigned long) data;
ec_read(OT_EC_DEVICE_STATE_ADDRESS, &result);
if (!blocked)
value = (u8) (result | radio);
else
value = (u8) (result & ~radio);
ec_write(OT_EC_DEVICE_STATE_ADDRESS, value);
return 0;
}
static const struct rfkill_ops oaktrail_rfkill_ops = {
.set_block = oaktrail_rfkill_set,
};
static struct rfkill *oaktrail_rfkill_new(char *name, enum rfkill_type type,
unsigned long mask)
{
struct rfkill *rfkill_dev;
u8 value;
int err;
rfkill_dev = rfkill_alloc(name, &oaktrail_device->dev, type,
&oaktrail_rfkill_ops, (void *)mask);
if (!rfkill_dev)
return ERR_PTR(-ENOMEM);
ec_read(OT_EC_DEVICE_STATE_ADDRESS, &value);
rfkill_init_sw_state(rfkill_dev, (value & mask) != 1);
err = rfkill_register(rfkill_dev);
if (err) {
rfkill_destroy(rfkill_dev);
return ERR_PTR(err);
}
return rfkill_dev;
}
static inline void __oaktrail_rfkill_cleanup(struct rfkill *rf)
{
if (rf) {
rfkill_unregister(rf);
rfkill_destroy(rf);
}
}
static void oaktrail_rfkill_cleanup(void)
{
__oaktrail_rfkill_cleanup(wifi_rfkill);
__oaktrail_rfkill_cleanup(bt_rfkill);
__oaktrail_rfkill_cleanup(gps_rfkill);
__oaktrail_rfkill_cleanup(wwan_rfkill);
}
static int oaktrail_rfkill_init(void)
{
int ret;
wifi_rfkill = oaktrail_rfkill_new("oaktrail-wifi",
RFKILL_TYPE_WLAN,
OT_EC_WIFI_MASK);
if (IS_ERR(wifi_rfkill)) {
ret = PTR_ERR(wifi_rfkill);
wifi_rfkill = NULL;
goto cleanup;
}
bt_rfkill = oaktrail_rfkill_new("oaktrail-bluetooth",
RFKILL_TYPE_BLUETOOTH,
OT_EC_BT_MASK);
if (IS_ERR(bt_rfkill)) {
ret = PTR_ERR(bt_rfkill);
bt_rfkill = NULL;
goto cleanup;
}
gps_rfkill = oaktrail_rfkill_new("oaktrail-gps",
RFKILL_TYPE_GPS,
OT_EC_GPS_MASK);
if (IS_ERR(gps_rfkill)) {
ret = PTR_ERR(gps_rfkill);
gps_rfkill = NULL;
goto cleanup;
}
wwan_rfkill = oaktrail_rfkill_new("oaktrail-wwan",
RFKILL_TYPE_WWAN,
OT_EC_WWAN_MASK);
if (IS_ERR(wwan_rfkill)) {
ret = PTR_ERR(wwan_rfkill);
wwan_rfkill = NULL;
goto cleanup;
}
return 0;
cleanup:
oaktrail_rfkill_cleanup();
return ret;
}
/* backlight */
static int get_backlight_brightness(struct backlight_device *b)
{
u8 value;
ec_read(OT_EC_BL_BRIGHTNESS_ADDRESS, &value);
return value;
}
static int set_backlight_brightness(struct backlight_device *b)
{
u8 percent = (u8) b->props.brightness;
if (percent < 0 || percent > OT_EC_BL_BRIGHTNESS_MAX)
return -EINVAL;
ec_write(OT_EC_BL_BRIGHTNESS_ADDRESS, percent);
ec_write(OT_EC_BL_CONTROL_ADDRESS, OT_EC_BL_CONTROL_ON_DATA);
return 0;
}
static const struct backlight_ops oaktrail_bl_ops = {
.get_brightness = get_backlight_brightness,
.update_status = set_backlight_brightness,
};
static int oaktrail_backlight_init(void)
{
struct backlight_device *bd;
struct backlight_properties props;
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_PLATFORM;
props.max_brightness = OT_EC_BL_BRIGHTNESS_MAX;
bd = backlight_device_register(DRIVER_NAME,
&oaktrail_device->dev, NULL,
&oaktrail_bl_ops,
&props);
if (IS_ERR(bd)) {
oaktrail_bl_device = NULL;
pr_warning("Unable to register backlight device\n");
return PTR_ERR(bd);
}
oaktrail_bl_device = bd;
bd->props.brightness = get_backlight_brightness(bd);
bd->props.power = FB_BLANK_UNBLANK;
backlight_update_status(bd);
return 0;
}
static void oaktrail_backlight_exit(void)
{
if (oaktrail_bl_device)
backlight_device_unregister(oaktrail_bl_device);
}
static int oaktrail_probe(struct platform_device *pdev)
{
return 0;
}
static int oaktrail_remove(struct platform_device *pdev)
{
return 0;
}
static struct platform_driver oaktrail_driver = {
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
},
.probe = oaktrail_probe,
.remove = oaktrail_remove,
};
static int dmi_check_cb(const struct dmi_system_id *id)
{
pr_info("Identified model '%s'\n", id->ident);
return 0;
}
static struct dmi_system_id __initdata oaktrail_dmi_table[] = {
{
.ident = "OakTrail platform",
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "OakTrail platform"),
},
.callback = dmi_check_cb
},
{ }
};
MODULE_DEVICE_TABLE(dmi, oaktrail_dmi_table);
static int __init oaktrail_init(void)
{
int ret;
if (acpi_disabled) {
pr_err("ACPI needs to be enabled for this driver to work!\n");
return -ENODEV;
}
if (!force && !dmi_check_system(oaktrail_dmi_table)) {
pr_err("Platform not recognized (You could try the module's force-parameter)");
return -ENODEV;
}
ret = platform_driver_register(&oaktrail_driver);
if (ret) {
pr_warning("Unable to register platform driver\n");
goto err_driver_reg;
}
oaktrail_device = platform_device_alloc(DRIVER_NAME, -1);
if (!oaktrail_device) {
pr_warning("Unable to allocate platform device\n");
ret = -ENOMEM;
goto err_device_alloc;
}
ret = platform_device_add(oaktrail_device);
if (ret) {
pr_warning("Unable to add platform device\n");
goto err_device_add;
}
if (!acpi_video_backlight_support()) {
ret = oaktrail_backlight_init();
if (ret)
goto err_backlight;
} else
pr_info("Backlight controlled by ACPI video driver\n");
ret = oaktrail_rfkill_init();
if (ret) {
pr_warning("Setup rfkill failed\n");
goto err_rfkill;
}
pr_info("Driver "DRIVER_VERSION" successfully loaded\n");
return 0;
err_rfkill:
oaktrail_backlight_exit();
err_backlight:
platform_device_del(oaktrail_device);
err_device_add:
platform_device_put(oaktrail_device);
err_device_alloc:
platform_driver_unregister(&oaktrail_driver);
err_driver_reg:
return ret;
}
static void __exit oaktrail_cleanup(void)
{
oaktrail_backlight_exit();
oaktrail_rfkill_cleanup();
platform_device_unregister(oaktrail_device);
platform_driver_unregister(&oaktrail_driver);
pr_info("Driver unloaded\n");
}
module_init(oaktrail_init);
module_exit(oaktrail_cleanup);
MODULE_AUTHOR("Yin Kangkai (kangkai.yin@intel.com)");
MODULE_DESCRIPTION("Intel Oaktrail Platform ACPI Extras");
MODULE_VERSION(DRIVER_VERSION);
MODULE_LICENSE("GPL");