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authorLinus Torvalds <torvalds@linux-foundation.org>2016-05-28 12:32:01 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-05-28 12:32:01 -0700
commita1842b2b6fc011145c24180744d62d88b895f8e3 (patch)
tree5232407e751e0e5209fcb0f62b8032d1bbe75d00
parent0723ab4a97a19bf9da135d68529977aeba17570d (diff)
parent8d057e3a180da16b0d1519056295165e7b8dc8f5 (diff)
Merge tag 'chrome-platform' of git://git.kernel.org/pub/scm/linux/kernel/git/olof/chrome-platform
Pull chrome platform updates from Olof Johansson "A handful of Chrome driver and binding changes this merge window: - a few patches to fix probing and configuration of pstore - a few patches adding Elan touchpad registration on a few devices - EC changes: a security fix dealing with max message sizes and addition of compat_ioctl support. - keyboard backlight control support There was also an accidential duplicate registration of trackpads on 'Leon', which was reverted just recently" * tag 'chrome-platform' of git://git.kernel.org/pub/scm/linux/kernel/git/olof/chrome-platform: Revert "platform/chrome: chromeos_laptop: Add Leon Touch" platform/chrome: chromeos_laptop - Add Elan touchpad for Wolf platform/chrome: chromeos_laptop - Add elan trackpad option for C720 platform/chrome: cros_ec_dev - Populate compat_ioctl platform/chrome: cros_ec_lightbar - use name instead of ID to hide lightbar attributes platform/chrome: cros_ec_dev - Fix security issue platform/chrome: Add Chrome OS keyboard backlight LEDs support platform/chrome: use to_platform_device() platform/chrome: pstore: Move to larger record size. platform/chrome: pstore: probe for ramoops buffer using acpi platform/chrome: chromeos_laptop: Add Leon Touch
-rw-r--r--drivers/platform/chrome/Kconfig10
-rw-r--r--drivers/platform/chrome/Makefile15
-rw-r--r--drivers/platform/chrome/chromeos_laptop.c22
-rw-r--r--drivers/platform/chrome/chromeos_pstore.c55
-rw-r--r--drivers/platform/chrome/cros_ec_dev.c7
-rw-r--r--drivers/platform/chrome/cros_ec_lightbar.c10
-rw-r--r--drivers/platform/chrome/cros_ec_proto.c4
-rw-r--r--drivers/platform/chrome/cros_kbd_led_backlight.c122
-rw-r--r--include/linux/mfd/cros_ec.h6
9 files changed, 234 insertions, 17 deletions
diff --git a/drivers/platform/chrome/Kconfig b/drivers/platform/chrome/Kconfig
index d03df4a60d05..76bdae1a93bb 100644
--- a/drivers/platform/chrome/Kconfig
+++ b/drivers/platform/chrome/Kconfig
@@ -64,4 +64,14 @@ config CROS_EC_PROTO
help
ChromeOS EC communication protocol helpers.
+config CROS_KBD_LED_BACKLIGHT
+ tristate "Backlight LED support for Chrome OS keyboards"
+ depends on LEDS_CLASS && ACPI
+ help
+ This option enables support for the keyboard backlight LEDs on
+ select Chrome OS systems.
+
+ To compile this driver as a module, choose M here: the
+ module will be called cros_kbd_led_backlight.
+
endif # CHROMEOS_PLATFORMS
diff --git a/drivers/platform/chrome/Makefile b/drivers/platform/chrome/Makefile
index bc498bda8211..4f3462783a3c 100644
--- a/drivers/platform/chrome/Makefile
+++ b/drivers/platform/chrome/Makefile
@@ -1,8 +1,9 @@
-obj-$(CONFIG_CHROMEOS_LAPTOP) += chromeos_laptop.o
-obj-$(CONFIG_CHROMEOS_PSTORE) += chromeos_pstore.o
-cros_ec_devs-objs := cros_ec_dev.o cros_ec_sysfs.o \
- cros_ec_lightbar.o cros_ec_vbc.o
-obj-$(CONFIG_CROS_EC_CHARDEV) += cros_ec_devs.o
-obj-$(CONFIG_CROS_EC_LPC) += cros_ec_lpc.o
-obj-$(CONFIG_CROS_EC_PROTO) += cros_ec_proto.o
+obj-$(CONFIG_CHROMEOS_LAPTOP) += chromeos_laptop.o
+obj-$(CONFIG_CHROMEOS_PSTORE) += chromeos_pstore.o
+cros_ec_devs-objs := cros_ec_dev.o cros_ec_sysfs.o \
+ cros_ec_lightbar.o cros_ec_vbc.o
+obj-$(CONFIG_CROS_EC_CHARDEV) += cros_ec_devs.o
+obj-$(CONFIG_CROS_EC_LPC) += cros_ec_lpc.o
+obj-$(CONFIG_CROS_EC_PROTO) += cros_ec_proto.o
+obj-$(CONFIG_CROS_KBD_LED_BACKLIGHT) += cros_kbd_led_backlight.o
diff --git a/drivers/platform/chrome/chromeos_laptop.c b/drivers/platform/chrome/chromeos_laptop.c
index 2b441e9ae593..e8a44a9bc916 100644
--- a/drivers/platform/chrome/chromeos_laptop.c
+++ b/drivers/platform/chrome/chromeos_laptop.c
@@ -34,6 +34,7 @@
#define ATMEL_TS_I2C_ADDR 0x4a
#define ATMEL_TS_I2C_BL_ADDR 0x26
#define CYAPA_TP_I2C_ADDR 0x67
+#define ELAN_TP_I2C_ADDR 0x15
#define ISL_ALS_I2C_ADDR 0x44
#define TAOS_ALS_I2C_ADDR 0x29
@@ -73,7 +74,7 @@ struct i2c_peripheral {
int tries;
};
-#define MAX_I2C_PERIPHERALS 3
+#define MAX_I2C_PERIPHERALS 4
struct chromeos_laptop {
struct i2c_peripheral i2c_peripherals[MAX_I2C_PERIPHERALS];
@@ -86,6 +87,11 @@ static struct i2c_board_info cyapa_device = {
.flags = I2C_CLIENT_WAKE,
};
+static struct i2c_board_info elantech_device = {
+ I2C_BOARD_INFO("elan_i2c", ELAN_TP_I2C_ADDR),
+ .flags = I2C_CLIENT_WAKE,
+};
+
static struct i2c_board_info isl_als_device = {
I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR),
};
@@ -306,6 +312,16 @@ static int setup_atmel_224s_tp(enum i2c_adapter_type type)
return (!tp) ? -EAGAIN : 0;
}
+static int setup_elantech_tp(enum i2c_adapter_type type)
+{
+ if (tp)
+ return 0;
+
+ /* add elantech touchpad */
+ tp = add_i2c_device("trackpad", type, &elantech_device);
+ return (!tp) ? -EAGAIN : 0;
+}
+
static int setup_atmel_1664s_ts(enum i2c_adapter_type type)
{
const unsigned short addr_list[] = { ATMEL_TS_I2C_BL_ADDR,
@@ -445,6 +461,8 @@ static struct chromeos_laptop dell_chromebook_11 = {
.i2c_peripherals = {
/* Touchpad. */
{ .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
+ /* Elan Touchpad option. */
+ { .add = setup_elantech_tp, I2C_ADAPTER_DESIGNWARE_0 },
},
};
@@ -475,6 +493,8 @@ static struct chromeos_laptop acer_c720 = {
{ .add = setup_atmel_1664s_ts, I2C_ADAPTER_DESIGNWARE_1 },
/* Touchpad. */
{ .add = setup_cyapa_tp, I2C_ADAPTER_DESIGNWARE_0 },
+ /* Elan Touchpad option. */
+ { .add = setup_elantech_tp, I2C_ADAPTER_DESIGNWARE_0 },
/* Light Sensor. */
{ .add = setup_isl29018_als, I2C_ADAPTER_DESIGNWARE_1 },
},
diff --git a/drivers/platform/chrome/chromeos_pstore.c b/drivers/platform/chrome/chromeos_pstore.c
index 34749200e4ab..308a853ac4f1 100644
--- a/drivers/platform/chrome/chromeos_pstore.c
+++ b/drivers/platform/chrome/chromeos_pstore.c
@@ -8,6 +8,7 @@
* the Free Software Foundation, version 2 of the License.
*/
+#include <linux/acpi.h>
#include <linux/dmi.h>
#include <linux/module.h>
#include <linux/platform_device.h>
@@ -58,7 +59,7 @@ MODULE_DEVICE_TABLE(dmi, chromeos_pstore_dmi_table);
static struct ramoops_platform_data chromeos_ramoops_data = {
.mem_size = 0x100000,
.mem_address = 0xf00000,
- .record_size = 0x20000,
+ .record_size = 0x40000,
.console_size = 0x20000,
.ftrace_size = 0x20000,
.dump_oops = 1,
@@ -71,9 +72,59 @@ static struct platform_device chromeos_ramoops = {
},
};
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id cros_ramoops_acpi_match[] = {
+ { "GOOG9999", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, cros_ramoops_acpi_match);
+
+static struct platform_driver chromeos_ramoops_acpi = {
+ .driver = {
+ .name = "chromeos_pstore",
+ .acpi_match_table = ACPI_PTR(cros_ramoops_acpi_match),
+ },
+};
+
+static int __init chromeos_probe_acpi(struct platform_device *pdev)
+{
+ struct resource *res;
+ resource_size_t len;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENOMEM;
+
+ len = resource_size(res);
+ if (!res->start || !len)
+ return -ENOMEM;
+
+ pr_info("chromeos ramoops using acpi device.\n");
+
+ chromeos_ramoops_data.mem_size = len;
+ chromeos_ramoops_data.mem_address = res->start;
+
+ return 0;
+}
+
+static bool __init chromeos_check_acpi(void)
+{
+ if (!platform_driver_probe(&chromeos_ramoops_acpi, chromeos_probe_acpi))
+ return true;
+ return false;
+}
+#else
+static inline bool chromeos_check_acpi(void) { return false; }
+#endif
+
static int __init chromeos_pstore_init(void)
{
- if (dmi_check_system(chromeos_pstore_dmi_table))
+ bool acpi_dev_found;
+
+ /* First check ACPI for non-hardcoded values from firmware. */
+ acpi_dev_found = chromeos_check_acpi();
+
+ if (acpi_dev_found || dmi_check_system(chromeos_pstore_dmi_table))
return platform_device_register(&chromeos_ramoops);
return -ENODEV;
diff --git a/drivers/platform/chrome/cros_ec_dev.c b/drivers/platform/chrome/cros_ec_dev.c
index d45cd254ed1c..6d8ee3b15872 100644
--- a/drivers/platform/chrome/cros_ec_dev.c
+++ b/drivers/platform/chrome/cros_ec_dev.c
@@ -137,6 +137,10 @@ static long ec_device_ioctl_xcmd(struct cros_ec_dev *ec, void __user *arg)
if (copy_from_user(&u_cmd, arg, sizeof(u_cmd)))
return -EFAULT;
+ if ((u_cmd.outsize > EC_MAX_MSG_BYTES) ||
+ (u_cmd.insize > EC_MAX_MSG_BYTES))
+ return -EINVAL;
+
s_cmd = kmalloc(sizeof(*s_cmd) + max(u_cmd.outsize, u_cmd.insize),
GFP_KERNEL);
if (!s_cmd)
@@ -208,6 +212,9 @@ static const struct file_operations fops = {
.release = ec_device_release,
.read = ec_device_read,
.unlocked_ioctl = ec_device_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = ec_device_ioctl,
+#endif
};
static void __remove(struct device *dev)
diff --git a/drivers/platform/chrome/cros_ec_lightbar.c b/drivers/platform/chrome/cros_ec_lightbar.c
index ff7640575c75..8df3d447cacf 100644
--- a/drivers/platform/chrome/cros_ec_lightbar.c
+++ b/drivers/platform/chrome/cros_ec_lightbar.c
@@ -412,9 +412,13 @@ static umode_t cros_ec_lightbar_attrs_are_visible(struct kobject *kobj,
struct device *dev = container_of(kobj, struct device, kobj);
struct cros_ec_dev *ec = container_of(dev,
struct cros_ec_dev, class_dev);
- struct platform_device *pdev = container_of(ec->dev,
- struct platform_device, dev);
- if (pdev->id != 0)
+ struct platform_device *pdev = to_platform_device(ec->dev);
+ struct cros_ec_platform *pdata = pdev->dev.platform_data;
+ int is_cros_ec;
+
+ is_cros_ec = strcmp(pdata->ec_name, CROS_EC_DEV_NAME);
+
+ if (is_cros_ec != 0)
return 0;
/* Only instantiate this stuff if the EC has a lightbar */
diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
index 990308ca384f..b6e161f71b26 100644
--- a/drivers/platform/chrome/cros_ec_proto.c
+++ b/drivers/platform/chrome/cros_ec_proto.c
@@ -298,8 +298,8 @@ int cros_ec_query_all(struct cros_ec_device *ec_dev)
ec_dev->max_response = EC_PROTO2_MAX_PARAM_SIZE;
ec_dev->max_passthru = 0;
ec_dev->pkt_xfer = NULL;
- ec_dev->din_size = EC_MSG_BYTES;
- ec_dev->dout_size = EC_MSG_BYTES;
+ ec_dev->din_size = EC_PROTO2_MSG_BYTES;
+ ec_dev->dout_size = EC_PROTO2_MSG_BYTES;
} else {
/*
* It's possible for a test to occur too early when
diff --git a/drivers/platform/chrome/cros_kbd_led_backlight.c b/drivers/platform/chrome/cros_kbd_led_backlight.c
new file mode 100644
index 000000000000..ca3e4da852b4
--- /dev/null
+++ b/drivers/platform/chrome/cros_kbd_led_backlight.c
@@ -0,0 +1,122 @@
+/*
+ * Keyboard backlight LED driver for Chrome OS.
+ *
+ * Copyright (C) 2012 Google, Inc.
+ *
+ * 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.
+ */
+
+#include <linux/acpi.h>
+#include <linux/leds.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+/* Keyboard LED ACPI Device must be defined in firmware */
+#define ACPI_KEYBOARD_BACKLIGHT_DEVICE "\\_SB.KBLT"
+#define ACPI_KEYBOARD_BACKLIGHT_READ ACPI_KEYBOARD_BACKLIGHT_DEVICE ".KBQC"
+#define ACPI_KEYBOARD_BACKLIGHT_WRITE ACPI_KEYBOARD_BACKLIGHT_DEVICE ".KBCM"
+
+#define ACPI_KEYBOARD_BACKLIGHT_MAX 100
+
+static void keyboard_led_set_brightness(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ union acpi_object param;
+ struct acpi_object_list input;
+ acpi_status status;
+
+ param.type = ACPI_TYPE_INTEGER;
+ param.integer.value = brightness;
+ input.count = 1;
+ input.pointer = &param;
+
+ status = acpi_evaluate_object(NULL, ACPI_KEYBOARD_BACKLIGHT_WRITE,
+ &input, NULL);
+ if (ACPI_FAILURE(status))
+ dev_err(cdev->dev, "Error setting keyboard LED value: %d\n",
+ status);
+}
+
+static enum led_brightness
+keyboard_led_get_brightness(struct led_classdev *cdev)
+{
+ unsigned long long brightness;
+ acpi_status status;
+
+ status = acpi_evaluate_integer(NULL, ACPI_KEYBOARD_BACKLIGHT_READ,
+ NULL, &brightness);
+ if (ACPI_FAILURE(status)) {
+ dev_err(cdev->dev, "Error getting keyboard LED value: %d\n",
+ status);
+ return -EIO;
+ }
+
+ return brightness;
+}
+
+static int keyboard_led_probe(struct platform_device *pdev)
+{
+ struct led_classdev *cdev;
+ acpi_handle handle;
+ acpi_status status;
+ int error;
+
+ /* Look for the keyboard LED ACPI Device */
+ status = acpi_get_handle(ACPI_ROOT_OBJECT,
+ ACPI_KEYBOARD_BACKLIGHT_DEVICE,
+ &handle);
+ if (ACPI_FAILURE(status)) {
+ dev_err(&pdev->dev, "Unable to find ACPI device %s: %d\n",
+ ACPI_KEYBOARD_BACKLIGHT_DEVICE, status);
+ return -ENXIO;
+ }
+
+ cdev = devm_kzalloc(&pdev->dev, sizeof(*cdev), GFP_KERNEL);
+ if (!cdev)
+ return -ENOMEM;
+
+ cdev->name = "chromeos::kbd_backlight";
+ cdev->max_brightness = ACPI_KEYBOARD_BACKLIGHT_MAX;
+ cdev->flags |= LED_CORE_SUSPENDRESUME;
+ cdev->brightness_set = keyboard_led_set_brightness;
+ cdev->brightness_get = keyboard_led_get_brightness;
+
+ error = devm_led_classdev_register(&pdev->dev, cdev);
+ if (error)
+ return error;
+
+ return 0;
+}
+
+static const struct acpi_device_id keyboard_led_id[] = {
+ { "GOOG0002", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, keyboard_led_id);
+
+static struct platform_driver keyboard_led_driver = {
+ .driver = {
+ .name = "chromeos-keyboard-leds",
+ .acpi_match_table = ACPI_PTR(keyboard_led_id),
+ },
+ .probe = keyboard_led_probe,
+};
+module_platform_driver(keyboard_led_driver);
+
+MODULE_AUTHOR("Simon Que <sque@chromium.org>");
+MODULE_DESCRIPTION("ChromeOS Keyboard backlight LED Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:chromeos-keyboard-leds");
diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h
index a677c2bd485c..64184d27e3cd 100644
--- a/include/linux/mfd/cros_ec.h
+++ b/include/linux/mfd/cros_ec.h
@@ -50,9 +50,11 @@ enum {
EC_MSG_TX_TRAILER_BYTES,
EC_MSG_RX_PROTO_BYTES = 3,
- /* Max length of messages */
- EC_MSG_BYTES = EC_PROTO2_MAX_PARAM_SIZE +
+ /* Max length of messages for proto 2*/
+ EC_PROTO2_MSG_BYTES = EC_PROTO2_MAX_PARAM_SIZE +
EC_MSG_TX_PROTO_BYTES,
+
+ EC_MAX_MSG_BYTES = 64 * 1024,
};
/*

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