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chrome platform changes for v5.4

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* CrOS EC / MFD Migration
  - Move cros_ec core driver from mfd into chrome platform.
 
 * Wilco EC:
  - Add batt_ppid_info command to Wilco telemetry driver.
 
 * CrOS EC:
  - cros_ec_rpmsg : Add support to inform EC of suspend/resume status
  - cros_ec_rpmsg : Fix race condition on probe failed
  - cros_ec_chardev : Add a poll handler to receive MKBP events
 
 * Misc:
  - bugfixes in cros_usbpd_logger and cros_ec_ishtp
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Merge tag 'tag-chrome-platform-for-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux

Pull chrome platform updates from Benson Leung:
 "CrOS EC / MFD Migration:
    - Move cros_ec core driver from mfd into chrome platform.

  Wilco EC:
    - Add batt_ppid_info command to Wilco telemetry driver.

  CrOS EC:
    - cros_ec_rpmsg : Add support to inform EC of suspend/resume status
    - cros_ec_rpmsg : Fix race condition on probe failed
    - cros_ec_chardev : Add a poll handler to receive MKBP events

  Misc:
    - bugfixes in cros_usbpd_logger and cros_ec_ishtp"

* tag 'tag-chrome-platform-for-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux:
  platform/chrome: cros_usbpd_logger: null check create_singlethread_workqueue
  platform/chrome: cros_ec_chardev: Add a poll handler to receive MKBP events
  platform/chrome: cros_ec_rpmsg: Fix race with host command when probe failed
  platform/chrome: chromeos_tbmc: Report wake events
  mfd: cros_ec: Use mfd_add_hotplug_devices() helper
  mfd: cros_ec: Add convenience struct to define autodetectable CrOS EC subdevices
  mfd: cros_ec: Add convenience struct to define dedicated CrOS EC MCUs
  mfd: cros_ec: Use kzalloc and cros_ec_cmd_xfer_status helper
  mfd / platform: cros_ec: Reorganize platform and mfd includes
  mfd / platform: cros_ec: Rename config to a better name
  mfd: cros_ec: Switch to use the new cros-ec-chardev driver
  mfd / platform: cros_ec: Miscellaneous character device to talk with the EC
  mfd / platform: cros_ec: Move cros-ec core driver out from MFD
  mfd / platform: cros_ec: Handle chained ECs as platform devices
  platform/chrome: cros_ec_rpmsg: Add host command AP sleep state support
  platform/chrome: chromeos_laptop: drop checks of NULL-safe functions
  platform/chrome: wilco_ec: Add batt_ppid_info command to telemetry driver
This commit is contained in:
Linus Torvalds 2019-09-19 14:14:28 -07:00
commit 32b90daf5c
55 changed files with 1164 additions and 776 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/extcon/Kconfig
View File

@ -181,7 +181,7 @@ config EXTCON_USB_GPIO
config EXTCON_USBC_CROS_EC
tristate "ChromeOS Embedded Controller EXTCON support"
depends on MFD_CROS_EC
depends on CROS_EC
help
Say Y here to enable USB Type C cable detection extcon support when
using Chrome OS EC based USB Type-C ports.

3
drivers/extcon/extcon-usbc-cros-ec.c
View File

@ -6,10 +6,11 @@
#include <linux/extcon-provider.h>
#include <linux/kernel.h>
#include <linux/mfd/cros_ec.h>
#include <linux/module.h>
#include <linux/notifier.h>
#include <linux/of.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/sched.h>

2
drivers/hid/Kconfig
View File

@ -376,7 +376,7 @@ config HOLTEK_FF
config HID_GOOGLE_HAMMER
tristate "Google Hammer Keyboard"
depends on USB_HID && LEDS_CLASS && MFD_CROS_EC
depends on USB_HID && LEDS_CLASS && CROS_EC
---help---
Say Y here if you have a Google Hammer device.

4
drivers/hid/hid-google-hammer.c
View File

@ -16,9 +16,9 @@
#include <linux/acpi.h>
#include <linux/hid.h>
#include <linux/leds.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/pm_wakeup.h>
#include <asm/unaligned.h>

2
drivers/i2c/busses/Kconfig
View File

@ -1345,7 +1345,7 @@ config I2C_SIBYTE
config I2C_CROS_EC_TUNNEL
tristate "ChromeOS EC tunnel I2C bus"
depends on MFD_CROS_EC
depends on CROS_EC
help
If you say yes here you get an I2C bus that will tunnel i2c commands
through to the other side of the ChromeOS EC to the i2c bus

4
drivers/i2c/busses/i2c-cros-ec-tunnel.c
View File

@ -5,8 +5,8 @@
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

3
drivers/iio/accel/cros_ec_accel_legacy.c
View File

@ -19,9 +19,10 @@
#include <linux/iio/triggered_buffer.h>
#include <linux/kernel.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#define DRV_NAME "cros-ec-accel-legacy"

2
drivers/iio/common/cros_ec_sensors/Kconfig
View File

@ -4,7 +4,7 @@
#
config IIO_CROS_EC_SENSORS_CORE
tristate "ChromeOS EC Sensors Core"
depends on SYSFS && MFD_CROS_EC
depends on SYSFS && CROS_EC
select IIO_BUFFER
select IIO_TRIGGERED_BUFFER
help

3
drivers/iio/common/cros_ec_sensors/cros_ec_lid_angle.c
View File

@ -20,9 +20,8 @@
#include <linux/iio/triggered_buffer.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/kernel.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

3
drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c
View File

@ -17,8 +17,9 @@
#include <linux/iio/triggered_buffer.h>
#include <linux/kernel.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

3
drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
View File

@ -14,9 +14,10 @@
#include <linux/iio/trigger_consumer.h>
#include <linux/kernel.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
static char *cros_ec_loc[] = {

3
drivers/iio/light/cros_ec_light_prox.c
View File

@ -15,8 +15,9 @@
#include <linux/iio/trigger_consumer.h>
#include <linux/kernel.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

3
drivers/iio/pressure/cros_ec_baro.c
View File

@ -15,9 +15,10 @@
#include <linux/iio/trigger_consumer.h>
#include <linux/kernel.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
/*

2
drivers/input/keyboard/Kconfig
View File

@ -736,7 +736,7 @@ config KEYBOARD_XTKBD
config KEYBOARD_CROS_EC
tristate "ChromeOS EC keyboard"
select INPUT_MATRIXKMAP
depends on MFD_CROS_EC
depends on CROS_EC
help
Say Y here to enable the matrix keyboard used by ChromeOS devices
and implemented on the ChromeOS EC. You must enable one bus option

4
drivers/input/keyboard/cros_ec_keyb.c
View File

@ -22,8 +22,8 @@
#include <linux/slab.h>
#include <linux/sysrq.h>
#include <linux/input/matrix_keypad.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <asm/unaligned.h>

3
drivers/media/platform/Kconfig
View File

@ -547,10 +547,9 @@ if CEC_PLATFORM_DRIVERS
config VIDEO_CROS_EC_CEC
tristate "ChromeOS EC CEC driver"
depends on MFD_CROS_EC
depends on CROS_EC
select CEC_CORE
select CEC_NOTIFIER
select CHROME_PLATFORMS
select CROS_EC_PROTO
help
If you say yes here you will get support for the

5
drivers/media/platform/cros-ec-cec/cros-ec-cec.c
View File

@ -14,10 +14,11 @@
#include <linux/cec.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/mfd/cros_ec.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <media/cec.h>
#include <media/cec-notifier.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#define DRV_NAME "cros-ec-cec"

26
drivers/mfd/Kconfig
View File

@ -211,26 +211,18 @@ config MFD_AXP20X_RSB
components like regulators or the PEK (Power Enable Key) under the
corresponding menus.
config MFD_CROS_EC
tristate "ChromeOS Embedded Controller"
config MFD_CROS_EC_DEV
tristate "ChromeOS Embedded Controller multifunction device"
select MFD_CORE
select CHROME_PLATFORMS
select CROS_EC_PROTO
depends on X86 || ARM || ARM64 || COMPILE_TEST
depends on CROS_EC
default CROS_EC
help
If you say Y here you get support for the ChromeOS Embedded
Controller (EC) providing keyboard, battery and power services.
You also need to enable the driver for the bus you are using. The
protocol for talking to the EC is defined by the bus driver.
Select this to get support for ChromeOS Embedded Controller
sub-devices. This driver will instantiate additional drivers such
as RTC, USBPD, etc. but you have to select the individual drivers.
config MFD_CROS_EC_CHARDEV
tristate "Chrome OS Embedded Controller userspace device interface"
depends on MFD_CROS_EC
---help---
This driver adds support to talk with the ChromeOS EC from userspace.
If you have a supported Chromebook, choose Y or M here.
The module will be called cros_ec_dev.
To compile this driver as a module, choose M here: the module will be
called cros-ec-dev.
config MFD_MADERA
tristate "Cirrus Logic Madera codecs"

4
drivers/mfd/Makefile
View File

@ -13,9 +13,7 @@ obj-$(CONFIG_MFD_ASIC3) += asic3.o tmio_core.o
obj-$(CONFIG_ARCH_BCM2835) += bcm2835-pm.o
obj-$(CONFIG_MFD_BCM590XX) += bcm590xx.o
obj-$(CONFIG_MFD_BD9571MWV) += bd9571mwv.o
cros_ec_core-objs := cros_ec.o
obj-$(CONFIG_MFD_CROS_EC) += cros_ec_core.o
obj-$(CONFIG_MFD_CROS_EC_CHARDEV) += cros_ec_dev.o
obj-$(CONFIG_MFD_CROS_EC_DEV) += cros_ec_dev.o
obj-$(CONFIG_MFD_EXYNOS_LPASS) += exynos-lpass.o
obj-$(CONFIG_HTC_PASIC3) += htc-pasic3.o

459
drivers/mfd/cros_ec_dev.c
View File

@ -5,73 +5,112 @@
* Copyright (C) 2014 Google, Inc.
*/
#include <linux/fs.h>
#include <linux/mfd/core.h>
#include <linux/mfd/cros_ec.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/platform_data/cros_ec_chardev.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include "cros_ec_dev.h"
#define DRV_NAME "cros-ec-dev"
/* Device variables */
#define CROS_MAX_DEV 128
static int ec_major;
static struct class cros_class = {
.owner = THIS_MODULE,
.name = "chromeos",
};
/* Basic communication */
static int ec_get_version(struct cros_ec_dev *ec, char *str, int maxlen)
{
struct ec_response_get_version *resp;
static const char * const current_image_name[] = {
"unknown", "read-only", "read-write", "invalid",
};
struct cros_ec_command *msg;
int ret;
/**
* cros_feature_to_name - CrOS feature id to name/short description.
* @id: The feature identifier.
* @name: Device name associated with the feature id.
* @desc: Short name that will be displayed.
*/
struct cros_feature_to_name {
unsigned int id;
const char *name;
const char *desc;
};
msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
if (!msg)
return -ENOMEM;
/**
* cros_feature_to_cells - CrOS feature id to mfd cells association.
* @id: The feature identifier.
* @mfd_cells: Pointer to the array of mfd cells that needs to be added.
* @num_cells: Number of mfd cells into the array.
*/
struct cros_feature_to_cells {
unsigned int id;
const struct mfd_cell *mfd_cells;
unsigned int num_cells;
};
msg->version = 0;
msg->command = EC_CMD_GET_VERSION + ec->cmd_offset;
msg->insize = sizeof(*resp);
msg->outsize = 0;
static const struct cros_feature_to_name cros_mcu_devices[] = {
{
.id = EC_FEATURE_FINGERPRINT,
.name = CROS_EC_DEV_FP_NAME,
.desc = "Fingerprint",
},
{
.id = EC_FEATURE_ISH,
.name = CROS_EC_DEV_ISH_NAME,
.desc = "Integrated Sensor Hub",
},
{
.id = EC_FEATURE_SCP,
.name = CROS_EC_DEV_SCP_NAME,
.desc = "System Control Processor",
},
{
.id = EC_FEATURE_TOUCHPAD,
.name = CROS_EC_DEV_TP_NAME,
.desc = "Touchpad",
},
};
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
goto exit;
static const struct mfd_cell cros_ec_cec_cells[] = {
{ .name = "cros-ec-cec", },
};
if (msg->result != EC_RES_SUCCESS) {
snprintf(str, maxlen,
"%s\nUnknown EC version: EC returned %d\n",
CROS_EC_DEV_VERSION, msg->result);
ret = -EINVAL;
goto exit;
}
static const struct mfd_cell cros_ec_rtc_cells[] = {
{ .name = "cros-ec-rtc", },
};
resp = (struct ec_response_get_version *)msg->data;
if (resp->current_image >= ARRAY_SIZE(current_image_name))
resp->current_image = 3; /* invalid */
static const struct mfd_cell cros_usbpd_charger_cells[] = {
{ .name = "cros-usbpd-charger", },
{ .name = "cros-usbpd-logger", },
};
snprintf(str, maxlen, "%s\n%s\n%s\n%s\n", CROS_EC_DEV_VERSION,
resp->version_string_ro, resp->version_string_rw,
current_image_name[resp->current_image]);
static const struct cros_feature_to_cells cros_subdevices[] = {
{
.id = EC_FEATURE_CEC,
.mfd_cells = cros_ec_cec_cells,
.num_cells = ARRAY_SIZE(cros_ec_cec_cells),
},
{
.id = EC_FEATURE_RTC,
.mfd_cells = cros_ec_rtc_cells,
.num_cells = ARRAY_SIZE(cros_ec_rtc_cells),
},
{
.id = EC_FEATURE_USB_PD,
.mfd_cells = cros_usbpd_charger_cells,
.num_cells = ARRAY_SIZE(cros_usbpd_charger_cells),
},
};
ret = 0;
exit:
kfree(msg);
return ret;
}
static const struct mfd_cell cros_ec_platform_cells[] = {
{ .name = "cros-ec-chardev", },
{ .name = "cros-ec-debugfs", },
{ .name = "cros-ec-lightbar", },
{ .name = "cros-ec-sysfs", },
};
static const struct mfd_cell cros_ec_vbc_cells[] = {
{ .name = "cros-ec-vbc", }
};
static int cros_ec_check_features(struct cros_ec_dev *ec, int feature)
{
@ -80,18 +119,15 @@ static int cros_ec_check_features(struct cros_ec_dev *ec, int feature)
if (ec->features[0] == -1U && ec->features[1] == -1U) {
/* features bitmap not read yet */
msg = kmalloc(sizeof(*msg) + sizeof(ec->features), GFP_KERNEL);
msg = kzalloc(sizeof(*msg) + sizeof(ec->features), GFP_KERNEL);
if (!msg)
return -ENOMEM;
msg->version = 0;
msg->command = EC_CMD_GET_FEATURES + ec->cmd_offset;
msg->insize = sizeof(ec->features);
msg->outsize = 0;
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0 || msg->result != EC_RES_SUCCESS) {
ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
if (ret < 0) {
dev_warn(ec->dev, "cannot get EC features: %d/%d\n",
ret, msg->result);
memset(ec->features, 0, sizeof(ec->features));
@ -108,142 +144,6 @@ static int cros_ec_check_features(struct cros_ec_dev *ec, int feature)
return ec->features[feature / 32] & EC_FEATURE_MASK_0(feature);
}
/* Device file ops */
static int ec_device_open(struct inode *inode, struct file *filp)
{
struct cros_ec_dev *ec = container_of(inode->i_cdev,
struct cros_ec_dev, cdev);
filp->private_data = ec;
nonseekable_open(inode, filp);
return 0;
}
static int ec_device_release(struct inode *inode, struct file *filp)
{
return 0;
}
static ssize_t ec_device_read(struct file *filp, char __user *buffer,
size_t length, loff_t *offset)
{
struct cros_ec_dev *ec = filp->private_data;
char msg[sizeof(struct ec_response_get_version) +
sizeof(CROS_EC_DEV_VERSION)];
size_t count;
int ret;
if (*offset != 0)
return 0;
ret = ec_get_version(ec, msg, sizeof(msg));
if (ret)
return ret;
count = min(length, strlen(msg));
if (copy_to_user(buffer, msg, count))
return -EFAULT;
*offset = count;
return count;
}
/* Ioctls */
static long ec_device_ioctl_xcmd(struct cros_ec_dev *ec, void __user *arg)
{
long ret;
struct cros_ec_command u_cmd;
struct cros_ec_command *s_cmd;
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)
return -ENOMEM;
if (copy_from_user(s_cmd, arg, sizeof(*s_cmd) + u_cmd.outsize)) {
ret = -EFAULT;
goto exit;
}
if (u_cmd.outsize != s_cmd->outsize ||
u_cmd.insize != s_cmd->insize) {
ret = -EINVAL;
goto exit;
}
s_cmd->command += ec->cmd_offset;
ret = cros_ec_cmd_xfer(ec->ec_dev, s_cmd);
/* Only copy data to userland if data was received. */
if (ret < 0)
goto exit;
if (copy_to_user(arg, s_cmd, sizeof(*s_cmd) + s_cmd->insize))
ret = -EFAULT;
exit:
kfree(s_cmd);
return ret;
}
static long ec_device_ioctl_readmem(struct cros_ec_dev *ec, void __user *arg)
{
struct cros_ec_device *ec_dev = ec->ec_dev;
struct cros_ec_readmem s_mem = { };
long num;
/* Not every platform supports direct reads */
if (!ec_dev->cmd_readmem)
return -ENOTTY;
if (copy_from_user(&s_mem, arg, sizeof(s_mem)))
return -EFAULT;
num = ec_dev->cmd_readmem(ec_dev, s_mem.offset, s_mem.bytes,
s_mem.buffer);
if (num <= 0)
return num;
if (copy_to_user((void __user *)arg, &s_mem, sizeof(s_mem)))
return -EFAULT;
return num;
}
static long ec_device_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
struct cros_ec_dev *ec = filp->private_data;
if (_IOC_TYPE(cmd) != CROS_EC_DEV_IOC)
return -ENOTTY;
switch (cmd) {
case CROS_EC_DEV_IOCXCMD:
return ec_device_ioctl_xcmd(ec, (void __user *)arg);
case CROS_EC_DEV_IOCRDMEM:
return ec_device_ioctl_readmem(ec, (void __user *)arg);
}
return -ENOTTY;
}
/* Module initialization */
static const struct file_operations fops = {
.open = ec_device_open,
.release = ec_device_release,
.read = ec_device_read,
.unlocked_ioctl = ec_device_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = ec_device_ioctl,
#endif
};
static void cros_ec_class_release(struct device *dev)
{
kfree(to_cros_ec_dev(dev));
@ -276,8 +176,8 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)
params = (struct ec_params_motion_sense *)msg->data;
params->cmd = MOTIONSENSE_CMD_DUMP;
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0 || msg->result != EC_RES_SUCCESS) {
ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
if (ret < 0) {
dev_warn(ec->dev, "cannot get EC sensor information: %d/%d\n",
ret, msg->result);
goto error;
@ -304,8 +204,8 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)
for (i = 0; i < sensor_num; i++) {
params->cmd = MOTIONSENSE_CMD_INFO;
params->info.sensor_num = i;
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0 || msg->result != EC_RES_SUCCESS) {
ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
if (ret < 0) {
dev_warn(ec->dev, "no info for EC sensor %d : %d/%d\n",
i, ret, msg->result);
continue;
@ -429,37 +329,12 @@ static void cros_ec_accel_legacy_register(struct cros_ec_dev *ec)
* Register 2 accelerometers, we will fail in the IIO driver if there
* are no sensors.
*/
ret = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
cros_ec_accel_legacy_cells,
ARRAY_SIZE(cros_ec_accel_legacy_cells),
NULL, 0, NULL);
ret = mfd_add_hotplug_devices(ec->dev, cros_ec_accel_legacy_cells,
ARRAY_SIZE(cros_ec_accel_legacy_cells));
if (ret)
dev_err(ec_dev->dev, "failed to add EC sensors\n");
}
static const struct mfd_cell cros_ec_cec_cells[] = {
{ .name = "cros-ec-cec" }
};
static const struct mfd_cell cros_ec_rtc_cells[] = {
{ .name = "cros-ec-rtc" }
};
static const struct mfd_cell cros_usbpd_charger_cells[] = {
{ .name = "cros-usbpd-charger" },
{ .name = "cros-usbpd-logger" },
};
static const struct mfd_cell cros_ec_platform_cells[] = {
{ .name = "cros-ec-debugfs" },
{ .name = "cros-ec-lightbar" },
{ .name = "cros-ec-sysfs" },
};
static const struct mfd_cell cros_ec_vbc_cells[] = {
{ .name = "cros-ec-vbc" }
};
static int ec_device_probe(struct platform_device *pdev)
{
int retval = -ENOMEM;
@ -467,6 +342,7 @@ static int ec_device_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct cros_ec_platform *ec_platform = dev_get_platdata(dev);
struct cros_ec_dev *ec = kzalloc(sizeof(*ec), GFP_KERNEL);
int i;
if (!ec)
return retval;
@ -478,57 +354,27 @@ static int ec_device_probe(struct platform_device *pdev)
ec->features[0] = -1U; /* Not cached yet */
ec->features[1] = -1U; /* Not cached yet */
device_initialize(&ec->class_dev);
cdev_init(&ec->cdev, &fops);
/* Check whether this is actually a Fingerprint MCU rather than an EC */
if (cros_ec_check_features(ec, EC_FEATURE_FINGERPRINT)) {
dev_info(dev, "CrOS Fingerprint MCU detected.\n");
for (i = 0; i < ARRAY_SIZE(cros_mcu_devices); i++) {
/*
* Help userspace differentiating ECs from FP MCU,
* regardless of the probing order.
* Check whether this is actually a dedicated MCU rather
* than an standard EC.
*/
ec_platform->ec_name = CROS_EC_DEV_FP_NAME;
}
/*
* Check whether this is actually an Integrated Sensor Hub (ISH)
* rather than an EC.
*/
if (cros_ec_check_features(ec, EC_FEATURE_ISH)) {
dev_info(dev, "CrOS ISH MCU detected.\n");
/*
* Help userspace differentiating ECs from ISH MCU,
* regardless of the probing order.
*/
ec_platform->ec_name = CROS_EC_DEV_ISH_NAME;
}
/* Check whether this is actually a Touchpad MCU rather than an EC */
if (cros_ec_check_features(ec, EC_FEATURE_TOUCHPAD)) {
dev_info(dev, "CrOS Touchpad MCU detected.\n");
/*
* Help userspace differentiating ECs from TP MCU,
* regardless of the probing order.
*/
ec_platform->ec_name = CROS_EC_DEV_TP_NAME;
}
/* Check whether this is actually a SCP rather than an EC. */
if (cros_ec_check_features(ec, EC_FEATURE_SCP)) {
dev_info(dev, "CrOS SCP MCU detected.\n");
/*
* Help userspace differentiating ECs from SCP,
* regardless of the probing order.
*/
ec_platform->ec_name = CROS_EC_DEV_SCP_NAME;
if (cros_ec_check_features(ec, cros_mcu_devices[i].id)) {
dev_info(dev, "CrOS %s MCU detected\n",
cros_mcu_devices[i].desc);
/*
* Help userspace differentiating ECs from other MCU,
* regardless of the probing order.
*/
ec_platform->ec_name = cros_mcu_devices[i].name;
break;
}
}
/*
* Add the class device
* Link to the character device for creating the /dev entry
* in devtmpfs.
*/
ec->class_dev.devt = MKDEV(ec_major, pdev->id);
ec->class_dev.class = &cros_class;
ec->class_dev.parent = dev;
ec->class_dev.release = cros_ec_class_release;
@ -539,6 +385,10 @@ static int ec_device_probe(struct platform_device *pdev)
goto failed;
}
retval = device_add(&ec->class_dev);
if (retval)
goto failed;
/* check whether this EC is a sensor hub. */
if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE))
cros_ec_sensors_register(ec);
@ -546,53 +396,29 @@ static int ec_device_probe(struct platform_device *pdev)
/* Workaroud for older EC firmware */
cros_ec_accel_legacy_register(ec);
/* Check whether this EC instance has CEC host command support */
if (cros_ec_check_features(ec, EC_FEATURE_CEC)) {
retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
cros_ec_cec_cells,
ARRAY_SIZE(cros_ec_cec_cells),
NULL, 0, NULL);
if (retval)
dev_err(ec->dev,
"failed to add cros-ec-cec device: %d\n",
retval);
/*
* The following subdevices can be detected by sending the
* EC_FEATURE_GET_CMD Embedded Controller device.
*/
for (i = 0; i < ARRAY_SIZE(cros_subdevices); i++) {
if (cros_ec_check_features(ec, cros_subdevices[i].id)) {
retval = mfd_add_hotplug_devices(ec->dev,
cros_subdevices[i].mfd_cells,
cros_subdevices[i].num_cells);
if (retval)
dev_err(ec->dev,
"failed to add %s subdevice: %d\n",
cros_subdevices[i].mfd_cells->name,
retval);
}
}
/* Check whether this EC instance has RTC host command support */
if (cros_ec_check_features(ec, EC_FEATURE_RTC)) {
retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
cros_ec_rtc_cells,
ARRAY_SIZE(cros_ec_rtc_cells),
NULL, 0, NULL);
if (retval)
dev_err(ec->dev,
"failed to add cros-ec-rtc device: %d\n",
retval);
}
/* Check whether this EC instance has the PD charge manager */
if (cros_ec_check_features(ec, EC_FEATURE_USB_PD)) {
retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
cros_usbpd_charger_cells,
ARRAY_SIZE(cros_usbpd_charger_cells),
NULL, 0, NULL);
if (retval)
dev_err(ec->dev,
"failed to add cros-usbpd-charger device: %d\n",
retval);
}
/* We can now add the sysfs class, we know which parameter to show */
retval = cdev_device_add(&ec->cdev, &ec->class_dev);
if (retval) {
dev_err(dev, "cdev_device_add failed => %d\n", retval);
goto failed;
}
retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
cros_ec_platform_cells,
ARRAY_SIZE(cros_ec_platform_cells),
NULL, 0, NULL);
/*
* The following subdevices cannot be detected by sending the
* EC_FEATURE_GET_CMD to the Embedded Controller device.
*/
retval = mfd_add_hotplug_devices(ec->dev, cros_ec_platform_cells,
ARRAY_SIZE(cros_ec_platform_cells));
if (retval)
dev_warn(ec->dev,
"failed to add cros-ec platform devices: %d\n",
@ -601,10 +427,8 @@ static int ec_device_probe(struct platform_device *pdev)
/* Check whether this EC instance has a VBC NVRAM */
node = ec->ec_dev->dev->of_node;
if (of_property_read_bool(node, "google,has-vbc-nvram")) {
retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
cros_ec_vbc_cells,
ARRAY_SIZE(cros_ec_vbc_cells),
NULL, 0, NULL);
retval = mfd_add_hotplug_devices(ec->dev, cros_ec_vbc_cells,
ARRAY_SIZE(cros_ec_vbc_cells));
if (retval)
dev_warn(ec->dev, "failed to add VBC devices: %d\n",
retval);
@ -622,7 +446,6 @@ static int ec_device_remove(struct platform_device *pdev)
struct cros_ec_dev *ec = dev_get_drvdata(&pdev->dev);
mfd_remove_devices(ec->dev);
cdev_del(&ec->cdev);
device_unregister(&ec->class_dev);
return 0;
}
@ -645,7 +468,6 @@ static struct platform_driver cros_ec_dev_driver = {
static int __init cros_ec_dev_init(void)
{
int ret;
dev_t dev = 0;
ret = class_register(&cros_class);
if (ret) {
@ -653,14 +475,6 @@ static int __init cros_ec_dev_init(void)
return ret;
}
/* Get a range of minor numbers (starting with 0) to work with */
ret = alloc_chrdev_region(&dev, 0, CROS_MAX_DEV, CROS_EC_DEV_NAME);
if (ret < 0) {
pr_err(CROS_EC_DEV_NAME ": alloc_chrdev_region() failed\n");
goto failed_chrdevreg;
}
ec_major = MAJOR(dev);
/* Register the driver */
ret = platform_driver_register(&cros_ec_dev_driver);
if (ret < 0) {
@ -670,8 +484,6 @@ static int __init cros_ec_dev_init(void)
return 0;
failed_devreg:
unregister_chrdev_region(MKDEV(ec_major, 0), CROS_MAX_DEV);
failed_chrdevreg:
class_unregister(&cros_class);
return ret;
}
@ -679,7 +491,6 @@ failed_chrdevreg:
static void __exit cros_ec_dev_exit(void)
{
platform_driver_unregister(&cros_ec_dev_driver);
unregister_chrdev(ec_major, CROS_EC_DEV_NAME);
class_unregister(&cros_class);
}

60
drivers/platform/chrome/Kconfig
View File

@ -3,6 +3,16 @@
# Platform support for Chrome OS hardware (Chromebooks and Chromeboxes)
#
config MFD_CROS_EC
tristate "Platform support for Chrome hardware (transitional)"
select CHROME_PLATFORMS
select CROS_EC
select CONFIG_MFD_CROS_EC_DEV
depends on X86 || ARM || ARM64 || COMPILE_TEST
help
This is a transitional Kconfig option and will be removed after
everyone enables the parts individually.
menuconfig CHROME_PLATFORMS
bool "Platform support for Chrome hardware"
depends on X86 || ARM || ARM64 || COMPILE_TEST
@ -50,9 +60,22 @@ config CHROMEOS_TBMC
To compile this driver as a module, choose M here: the
module will be called chromeos_tbmc.
config CROS_EC
tristate "ChromeOS Embedded Controller"
select CROS_EC_PROTO
depends on X86 || ARM || ARM64 || COMPILE_TEST
help
If you say Y here you get support for the ChromeOS Embedded
Controller (EC) providing keyboard, battery and power services.
You also need to enable the driver for the bus you are using. The
protocol for talking to the EC is defined by the bus driver.
To compile this driver as a module, choose M here: the
module will be called cros_ec.
config CROS_EC_I2C
tristate "ChromeOS Embedded Controller (I2C)"
depends on MFD_CROS_EC && I2C
depends on CROS_EC && I2C
help
If you say Y here, you get support for talking to the ChromeOS
@ -62,7 +85,7 @@ config CROS_EC_I2C
config CROS_EC_RPMSG
tristate "ChromeOS Embedded Controller (rpmsg)"
depends on MFD_CROS_EC && RPMSG && OF
depends on CROS_EC && RPMSG && OF
help
If you say Y here, you get support for talking to the ChromeOS EC
through rpmsg. This uses a simple byte-level protocol with a
@ -74,7 +97,7 @@ config CROS_EC_RPMSG
config CROS_EC_ISHTP
tristate "ChromeOS Embedded Controller (ISHTP)"
depends on MFD_CROS_EC
depends on CROS_EC
depends on INTEL_ISH_HID
help
If you say Y here, you get support for talking to the ChromeOS EC
@ -87,7 +110,7 @@ config CROS_EC_ISHTP
config CROS_EC_SPI
tristate "ChromeOS Embedded Controller (SPI)"
depends on MFD_CROS_EC && SPI
depends on CROS_EC && SPI
---help---
If you say Y here, you get support for talking to the ChromeOS EC
@ -97,7 +120,7 @@ config CROS_EC_SPI
config CROS_EC_LPC
tristate "ChromeOS Embedded Controller (LPC)"
depends on MFD_CROS_EC && ACPI && (X86 || COMPILE_TEST)
depends on CROS_EC && ACPI && (X86 || COMPILE_TEST)
help
If you say Y here, you get support for talking to the ChromeOS EC
over an LPC bus, including the LPC Microchip EC (MEC) variant.
@ -123,10 +146,21 @@ config CROS_KBD_LED_BACKLIGHT
To compile this driver as a module, choose M here: the
module will be called cros_kbd_led_backlight.
config CROS_EC_CHARDEV
tristate "ChromeOS EC miscdevice"
depends on MFD_CROS_EC_DEV
default MFD_CROS_EC_DEV
help
This driver adds file operations support to talk with the
ChromeOS EC from userspace via a character device.
To compile this driver as a module, choose M here: the
module will be called cros_ec_chardev.
config CROS_EC_LIGHTBAR
tristate "Chromebook Pixel's lightbar support"
depends on MFD_CROS_EC_CHARDEV
default MFD_CROS_EC_CHARDEV
depends on MFD_CROS_EC_DEV
default MFD_CROS_EC_DEV
help
This option exposes the Chromebook Pixel's lightbar to
userspace.
@ -136,8 +170,8 @@ config CROS_EC_LIGHTBAR
config CROS_EC_VBC
tristate "ChromeOS EC vboot context support"
depends on MFD_CROS_EC_CHARDEV && OF
default MFD_CROS_EC_CHARDEV
depends on MFD_CROS_EC_DEV && OF
default MFD_CROS_EC_DEV
help
This option exposes the ChromeOS EC vboot context nvram to
userspace.
@ -147,8 +181,8 @@ config CROS_EC_VBC
config CROS_EC_DEBUGFS
tristate "Export ChromeOS EC internals in DebugFS"
depends on MFD_CROS_EC_CHARDEV && DEBUG_FS
default MFD_CROS_EC_CHARDEV
depends on MFD_CROS_EC_DEV && DEBUG_FS
default MFD_CROS_EC_DEV
help
This option exposes the ChromeOS EC device internals to
userspace.
@ -158,8 +192,8 @@ config CROS_EC_DEBUGFS
config CROS_EC_SYSFS
tristate "ChromeOS EC control and information through sysfs"
depends on MFD_CROS_EC_CHARDEV && SYSFS
default MFD_CROS_EC_CHARDEV
depends on MFD_CROS_EC_DEV && SYSFS
default MFD_CROS_EC_DEV
help
This option exposes some sysfs attributes to control and get
information from ChromeOS EC.

2
drivers/platform/chrome/Makefile
View File

@ -6,6 +6,7 @@ CFLAGS_cros_ec_trace.o:= -I$(src)
obj-$(CONFIG_CHROMEOS_LAPTOP) += chromeos_laptop.o
obj-$(CONFIG_CHROMEOS_PSTORE) += chromeos_pstore.o
obj-$(CONFIG_CHROMEOS_TBMC) += chromeos_tbmc.o
obj-$(CONFIG_CROS_EC) += cros_ec.o
obj-$(CONFIG_CROS_EC_I2C) += cros_ec_i2c.o
obj-$(CONFIG_CROS_EC_ISHTP) += cros_ec_ishtp.o
obj-$(CONFIG_CROS_EC_RPMSG) += cros_ec_rpmsg.o
@ -14,6 +15,7 @@ cros_ec_lpcs-objs := cros_ec_lpc.o cros_ec_lpc_mec.o
obj-$(CONFIG_CROS_EC_LPC) += cros_ec_lpcs.o
obj-$(CONFIG_CROS_EC_PROTO) += cros_ec_proto.o cros_ec_trace.o
obj-$(CONFIG_CROS_KBD_LED_BACKLIGHT) += cros_kbd_led_backlight.o
obj-$(CONFIG_CROS_EC_CHARDEV) += cros_ec_chardev.o
obj-$(CONFIG_CROS_EC_LIGHTBAR) += cros_ec_lightbar.o
obj-$(CONFIG_CROS_EC_VBC) += cros_ec_vbc.o
obj-$(CONFIG_CROS_EC_DEBUGFS) += cros_ec_debugfs.o

10
drivers/platform/chrome/chromeos_laptop.c
View File

@ -838,18 +838,14 @@ static void chromeos_laptop_destroy(const struct chromeos_laptop *cros_laptop)
i2c_dev = &cros_laptop->i2c_peripherals[i];
info = &i2c_dev->board_info;
if (i2c_dev->client)
i2c_unregister_device(i2c_dev->client);
if (info->properties)
property_entries_free(info->properties);
i2c_unregister_device(i2c_dev->client);
property_entries_free(info->properties);
}
for (i = 0; i < cros_laptop->num_acpi_peripherals; i++) {
acpi_dev = &cros_laptop->acpi_peripherals[i];
if (acpi_dev->properties)
property_entries_free(acpi_dev->properties);
property_entries_free(acpi_dev->properties);
}
kfree(cros_laptop->i2c_peripherals);

2
drivers/platform/chrome/chromeos_tbmc.c
View File

@ -47,6 +47,7 @@ static __maybe_unused int chromeos_tbmc_resume(struct device *dev)
static void chromeos_tbmc_notify(struct acpi_device *adev, u32 event)
{
acpi_pm_wakeup_event(&adev->dev);
switch (event) {
case 0x80:
chromeos_tbmc_query_switch(adev, adev->driver_data);
@ -90,6 +91,7 @@ static int chromeos_tbmc_add(struct acpi_device *adev)
dev_err(dev, "cannot register input device\n");
return ret;
}
device_init_wakeup(dev, true);
return 0;
}

64
drivers/mfd/cros_ec.c → drivers/platform/chrome/cros_ec.c
View File

@ -13,8 +13,8 @@
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/mfd/core.h>
#include <linux/mfd/cros_ec.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/suspend.h>
#include <asm/unaligned.h>
@ -31,18 +31,6 @@ static struct cros_ec_platform pd_p = {
.cmd_offset = EC_CMD_PASSTHRU_OFFSET(CROS_EC_DEV_PD_INDEX),
};
static const struct mfd_cell ec_cell = {
.name = "cros-ec-dev",
.platform_data = &ec_p,
.pdata_size = sizeof(ec_p),
};
static const struct mfd_cell ec_pd_cell = {
.name = "cros-ec-dev",
.platform_data = &pd_p,
.pdata_size = sizeof(pd_p),
};
static irqreturn_t ec_irq_thread(int irq, void *data)
{
struct cros_ec_device *ec_dev = data;
@ -154,38 +142,42 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
}
}
err = devm_mfd_add_devices(ec_dev->dev, PLATFORM_DEVID_AUTO, &ec_cell,
1, NULL, ec_dev->irq, NULL);
if (err) {
dev_err(dev,
"Failed to register Embedded Controller subdevice %d\n",
err);
return err;
/* Register a platform device for the main EC instance */
ec_dev->ec = platform_device_register_data(ec_dev->dev, "cros-ec-dev",
PLATFORM_DEVID_AUTO, &ec_p,
sizeof(struct cros_ec_platform));
if (IS_ERR(ec_dev->ec)) {
dev_err(ec_dev->dev,
"Failed to create CrOS EC platform device\n");
return PTR_ERR(ec_dev->ec);
}
if (ec_dev->max_passthru) {
/*
* Register a PD device as well on top of this device.
* Register a platform device for the PD behind the main EC.
* We make the following assumptions:
* - behind an EC, we have a pd
* - only one device added.
* - the EC is responsive at init time (it is not true for a
* sensor hub.
* sensor hub).
*/
err = devm_mfd_add_devices(ec_dev->dev, PLATFORM_DEVID_AUTO,
&ec_pd_cell, 1, NULL, ec_dev->irq, NULL);
if (err) {
dev_err(dev,
"Failed to register Power Delivery subdevice %d\n",
err);
return err;
ec_dev->pd = platform_device_register_data(ec_dev->dev,
"cros-ec-dev",
PLATFORM_DEVID_AUTO, &pd_p,
sizeof(struct cros_ec_platform));
if (IS_ERR(ec_dev->pd)) {
dev_err(ec_dev->dev,
"Failed to create CrOS PD platform device\n");
platform_device_unregister(ec_dev->ec);
return PTR_ERR(ec_dev->pd);
}
}
if (IS_ENABLED(CONFIG_OF) && dev->of_node) {
err = devm_of_platform_populate(dev);
if (err) {
mfd_remove_devices(dev);
platform_device_unregister(ec_dev->pd);
platform_device_unregister(ec_dev->ec);
dev_err(dev, "Failed to register sub-devices\n");
return err;
}
@ -206,6 +198,16 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
}
EXPORT_SYMBOL(cros_ec_register);
int cros_ec_unregister(struct cros_ec_device *ec_dev)
{
if (ec_dev->pd)
platform_device_unregister(ec_dev->pd);
platform_device_unregister(ec_dev->ec);
return 0;
}
EXPORT_SYMBOL(cros_ec_unregister);
#ifdef CONFIG_PM_SLEEP
int cros_ec_suspend(struct cros_ec_device *ec_dev)
{

419
drivers/platform/chrome/cros_ec_chardev.c Normal file
View File

@ -0,0 +1,419 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Miscellaneous character driver for ChromeOS Embedded Controller
*
* Copyright 2014 Google, Inc.
* Copyright 2019 Google LLC
*
* This file is a rework and part of the code is ported from
* drivers/mfd/cros_ec_dev.c that was originally written by
* Bill Richardson.
*/
#include <linux/init.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/mfd/cros_ec.h>
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/notifier.h>
#include <linux/platform_data/cros_ec_chardev.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/poll.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/uaccess.h>
#define DRV_NAME "cros-ec-chardev"
/* Arbitrary bounded size for the event queue */
#define CROS_MAX_EVENT_LEN PAGE_SIZE
struct chardev_data {
struct cros_ec_dev *ec_dev;
struct miscdevice misc;
};
struct chardev_priv {
struct cros_ec_dev *ec_dev;
struct notifier_block notifier;
wait_queue_head_t wait_event;
unsigned long event_mask;
struct list_head events;
size_t event_len;
};
struct ec_event {
struct list_head node;
size_t size;
u8 event_type;
u8 data[0];
};
static int ec_get_version(struct cros_ec_dev *ec, char *str, int maxlen)
{
static const char * const current_image_name[] = {
"unknown", "read-only", "read-write", "invalid",
};
struct ec_response_get_version *resp;
struct cros_ec_command *msg;
int ret;
msg = kzalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
if (!msg)
return -ENOMEM;
msg->command = EC_CMD_GET_VERSION + ec->cmd_offset;
msg->insize = sizeof(*resp);
ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
if (ret < 0) {
snprintf(str, maxlen,
"Unknown EC version, returned error: %d\n",
msg->result);
goto exit;
}
resp = (struct ec_response_get_version *)msg->data;
if (resp->current_image >= ARRAY_SIZE(current_image_name))
resp->current_image = 3; /* invalid */
snprintf(str, maxlen, "%s\n%s\n%s\n%s\n", CROS_EC_DEV_VERSION,
resp->version_string_ro, resp->version_string_rw,
current_image_name[resp->current_image]);
ret = 0;
exit:
kfree(msg);
return ret;
}
static int cros_ec_chardev_mkbp_event(struct notifier_block *nb,
unsigned long queued_during_suspend,
void *_notify)
{
struct chardev_priv *priv = container_of(nb, struct chardev_priv,
notifier);
struct cros_ec_device *ec_dev = priv->ec_dev->ec_dev;
struct ec_event *event;
unsigned long event_bit = 1 << ec_dev->event_data.event_type;
int total_size = sizeof(*event) + ec_dev->event_size;
if (!(event_bit & priv->event_mask) ||
(priv->event_len + total_size) > CROS_MAX_EVENT_LEN)
return NOTIFY_DONE;
event = kzalloc(total_size, GFP_KERNEL);
if (!event)
return NOTIFY_DONE;
event->size = ec_dev->event_size;
event->event_type = ec_dev->event_data.event_type;
memcpy(event->data, &ec_dev->event_data.data, ec_dev->event_size);
spin_lock(&priv->wait_event.lock);
list_add_tail(&event->node, &priv->events);
priv->event_len += total_size;
wake_up_locked(&priv->wait_event);
spin_unlock(&priv->wait_event.lock);
return NOTIFY_OK;
}
static struct ec_event *cros_ec_chardev_fetch_event(struct chardev_priv *priv,
bool fetch, bool block)
{
struct ec_event *event;
int err;
spin_lock(&priv->wait_event.lock);
if (!block && list_empty(&priv->events)) {
event = ERR_PTR(-EWOULDBLOCK);
goto out;
}
if (!fetch) {
event = NULL;
goto out;
}
err = wait_event_interruptible_locked(priv->wait_event,
!list_empty(&priv->events));
if (err) {
event = ERR_PTR(err);
goto out;
}
event = list_first_entry(&priv->events, struct ec_event, node);
list_del(&event->node);
priv->event_len -= sizeof(*event) + event->size;
out:
spin_unlock(&priv->wait_event.lock);
return event;
}
/*
* Device file ops
*/
static int cros_ec_chardev_open(struct inode *inode, struct file *filp)
{
struct miscdevice *mdev = filp->private_data;
struct cros_ec_dev *ec_dev = dev_get_drvdata(mdev->parent);
struct chardev_priv *priv;
int ret;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->ec_dev = ec_dev;
filp->private_data = priv;
INIT_LIST_HEAD(&priv->events);
init_waitqueue_head(&priv->wait_event);
nonseekable_open(inode, filp);
priv->notifier.notifier_call = cros_ec_chardev_mkbp_event;
ret = blocking_notifier_chain_register(&ec_dev->ec_dev->event_notifier,
&priv->notifier);
if (ret) {
dev_err(ec_dev->dev, "failed to register event notifier\n");
kfree(priv);
}
return ret;
}
static __poll_t cros_ec_chardev_poll(struct file *filp, poll_table *wait)
{
struct chardev_priv *priv = filp->private_data;
poll_wait(filp, &priv->wait_event, wait);
if (list_empty(&priv->events))
return 0;
return EPOLLIN | EPOLLRDNORM;
}
static ssize_t cros_ec_chardev_read(struct file *filp, char __user *buffer,
size_t length, loff_t *offset)
{
char msg[sizeof(struct ec_response_get_version) +
sizeof(CROS_EC_DEV_VERSION)];
struct chardev_priv *priv = filp->private_data;
struct cros_ec_dev *ec_dev = priv->ec_dev;
size_t count;
int ret;
if (priv->event_mask) { /* queued MKBP event */
struct ec_event *event;
event = cros_ec_chardev_fetch_event(priv, length != 0,
!(filp->f_flags & O_NONBLOCK));
if (IS_ERR(event))
return PTR_ERR(event);
/*
* length == 0 is special - no IO is done but we check
* for error conditions.
*/
if (length == 0)
return 0;
/* The event is 1 byte of type plus the payload */
count = min(length, event->size + 1);
ret = copy_to_user(buffer, &event->event_type, count);
kfree(event);
if (ret) /* the copy failed */
return -EFAULT;
*offset = count;
return count;
}
/*
* Legacy behavior if no event mask is defined
*/
if (*offset != 0)
return 0;
ret = ec_get_version(ec_dev, msg, sizeof(msg));
if (ret)
return ret;
count = min(length, strlen(msg));
if (copy_to_user(buffer, msg, count))
return -EFAULT;
*offset = count;
return count;
}
static int cros_ec_chardev_release(struct inode *inode, struct file *filp)
{
struct chardev_priv *priv = filp->private_data;
struct cros_ec_dev *ec_dev = priv->ec_dev;
struct ec_event *event, *e;
blocking_notifier_chain_unregister(&ec_dev->ec_dev->event_notifier,
&priv->notifier);
list_for_each_entry_safe(event, e, &priv->events, node) {
list_del(&event->node);
kfree(event);
}
kfree(priv);
return 0;
}
/*
* Ioctls
*/
static long cros_ec_chardev_ioctl_xcmd(struct cros_ec_dev *ec, void __user *arg)
{
struct cros_ec_command *s_cmd;
struct cros_ec_command u_cmd;
long ret;
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)
return -ENOMEM;
if (copy_from_user(s_cmd, arg, sizeof(*s_cmd) + u_cmd.outsize)) {
ret = -EFAULT;
goto exit;
}
if (u_cmd.outsize != s_cmd->outsize ||
u_cmd.insize != s_cmd->insize) {
ret = -EINVAL;
goto exit;
}
s_cmd->command += ec->cmd_offset;
ret = cros_ec_cmd_xfer(ec->ec_dev, s_cmd);
/* Only copy data to userland if data was received. */
if (ret < 0)
goto exit;
if (copy_to_user(arg, s_cmd, sizeof(*s_cmd) + s_cmd->insize))
ret = -EFAULT;
exit:
kfree(s_cmd);
return ret;
}
static long cros_ec_chardev_ioctl_readmem(struct cros_ec_dev *ec,
void __user *arg)
{
struct cros_ec_device *ec_dev = ec->ec_dev;
struct cros_ec_readmem s_mem = { };
long num;
/* Not every platform supports direct reads */
if (!ec_dev->cmd_readmem)
return -ENOTTY;
if (copy_from_user(&s_mem, arg, sizeof(s_mem)))
return -EFAULT;
num = ec_dev->cmd_readmem(ec_dev, s_mem.offset, s_mem.bytes,
s_mem.buffer);
if (num <= 0)
return num;
if (copy_to_user((void __user *)arg, &s_mem, sizeof(s_mem)))
return -EFAULT;
return num;
}
static long cros_ec_chardev_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
struct chardev_priv *priv = filp->private_data;
struct cros_ec_dev *ec = priv->ec_dev;
if (_IOC_TYPE(cmd) != CROS_EC_DEV_IOC)
return -ENOTTY;
switch (cmd) {
case CROS_EC_DEV_IOCXCMD:
return cros_ec_chardev_ioctl_xcmd(ec, (void __user *)arg);
case CROS_EC_DEV_IOCRDMEM:
return cros_ec_chardev_ioctl_readmem(ec, (void __user *)arg);
case CROS_EC_DEV_IOCEVENTMASK:
priv->event_mask = arg;
return 0;
}
return -ENOTTY;
}
static const struct file_operations chardev_fops = {
.open = cros_ec_chardev_open,
.poll = cros_ec_chardev_poll,
.read = cros_ec_chardev_read,
.release = cros_ec_chardev_release,
.unlocked_ioctl = cros_ec_chardev_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = cros_ec_chardev_ioctl,
#endif
};
static int cros_ec_chardev_probe(struct platform_device *pdev)
{
struct cros_ec_dev *ec_dev = dev_get_drvdata(pdev->dev.parent);
struct cros_ec_platform *ec_platform = dev_get_platdata(ec_dev->dev);
struct chardev_data *data;
/* Create a char device: we want to create it anew */
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->ec_dev = ec_dev;
data->misc.minor = MISC_DYNAMIC_MINOR;
data->misc.fops = &chardev_fops;
data->misc.name = ec_platform->ec_name;
data->misc.parent = pdev->dev.parent;
dev_set_drvdata(&pdev->dev, data);
return misc_register(&data->misc);
}
static int cros_ec_chardev_remove(struct platform_device *pdev)
{
struct chardev_data *data = dev_get_drvdata(&pdev->dev);
misc_deregister(&data->misc);
return 0;
}
static struct platform_driver cros_ec_chardev_driver = {
.driver = {
.name = DRV_NAME,
},
.probe = cros_ec_chardev_probe,
.remove = cros_ec_chardev_remove,
};
module_platform_driver(cros_ec_chardev_driver);
MODULE_ALIAS("platform:" DRV_NAME);
MODULE_AUTHOR("Enric Balletbo i Serra <enric.balletbo@collabora.com>");
MODULE_DESCRIPTION("ChromeOS EC Miscellaneous Character Driver");
MODULE_LICENSE("GPL");

3
drivers/platform/chrome/cros_ec_debugfs.c
View File

@ -8,9 +8,10 @@
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/poll.h>
#include <linux/sched.h>

12
drivers/platform/chrome/cros_ec_i2c.c
View File

@ -9,8 +9,8 @@
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
@ -307,6 +307,13 @@ static int cros_ec_i2c_probe(struct i2c_client *client,
return 0;
}
static int cros_ec_i2c_remove(struct i2c_client *client)
{
struct cros_ec_device *ec_dev = i2c_get_clientdata(client);
return cros_ec_unregister(ec_dev);
}
#ifdef CONFIG_PM_SLEEP
static int cros_ec_i2c_suspend(struct device *dev)
{
@ -357,6 +364,7 @@ static struct i2c_driver cros_ec_driver = {
.pm = &cros_ec_i2c_pm_ops,
},
.probe = cros_ec_i2c_probe,
.remove = cros_ec_i2c_remove,
.id_table = cros_ec_i2c_id,
};

5
drivers/platform/chrome/cros_ec_ishtp.c
View File

@ -8,11 +8,10 @@
// (ISH-TP).
#include <linux/delay.h>
#include <linux/mfd/core.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/intel-ish-client-if.h>
/*

3
drivers/platform/chrome/cros_ec_lightbar.c
View File

@ -9,8 +9,9 @@
#include <linux/fs.h>
#include <linux/kobject.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/sched.h>
#include <linux/types.h>

7
drivers/platform/chrome/cros_ec_lpc.c
View File

@ -16,9 +16,9 @@
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/printk.h>
#include <linux/suspend.h>
@ -421,6 +421,7 @@ static int cros_ec_lpc_probe(struct platform_device *pdev)
static int cros_ec_lpc_remove(struct platform_device *pdev)
{
struct cros_ec_device *ec_dev = platform_get_drvdata(pdev);
struct acpi_device *adev;
adev = ACPI_COMPANION(&pdev->dev);
@ -428,7 +429,7 @@ static int cros_ec_lpc_remove(struct platform_device *pdev)
acpi_remove_notify_handler(adev->handle, ACPI_ALL_NOTIFY,
cros_ec_lpc_acpi_notify);
return 0;
return cros_ec_unregister(ec_dev);
}
static const struct acpi_device_id cros_ec_lpc_acpi_device_ids[] = {

3
drivers/platform/chrome/cros_ec_proto.c
View File

@ -3,10 +3,11 @@
//
// Copyright (C) 2015 Google, Inc
#include <linux/mfd/cros_ec.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/slab.h>
#include <asm/unaligned.h>

57
drivers/platform/chrome/cros_ec_rpmsg.c
View File

@ -6,9 +6,9 @@
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/of.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/rpmsg.h>
#include <linux/slab.h>
@ -41,6 +41,7 @@ struct cros_ec_rpmsg {
struct rpmsg_device *rpdev;
struct completion xfer_ack;
struct work_struct host_event_work;
struct rpmsg_endpoint *ept;
};
/**
@ -72,7 +73,6 @@ static int cros_ec_pkt_xfer_rpmsg(struct cros_ec_device *ec_dev,
struct cros_ec_command *ec_msg)
{
struct cros_ec_rpmsg *ec_rpmsg = ec_dev->priv;
struct rpmsg_device *rpdev = ec_rpmsg->rpdev;
struct ec_host_response *response;
unsigned long timeout;
int len;
@ -85,7 +85,7 @@ static int cros_ec_pkt_xfer_rpmsg(struct cros_ec_device *ec_dev,
dev_dbg(ec_dev->dev, "prepared, len=%d\n", len);
reinit_completion(&ec_rpmsg->xfer_ack);
ret = rpmsg_send(rpdev->ept, ec_dev->dout, len);
ret = rpmsg_send(ec_rpmsg->ept, ec_dev->dout, len);
if (ret) {
dev_err(ec_dev->dev, "rpmsg send failed\n");
return ret;
@ -196,11 +196,24 @@ static int cros_ec_rpmsg_callback(struct rpmsg_device *rpdev, void *data,
return 0;
}
static struct rpmsg_endpoint *
cros_ec_rpmsg_create_ept(struct rpmsg_device *rpdev)
{
struct rpmsg_channel_info chinfo = {};
strscpy(chinfo.name, rpdev->id.name, RPMSG_NAME_SIZE);
chinfo.src = rpdev->src;
chinfo.dst = RPMSG_ADDR_ANY;
return rpmsg_create_ept(rpdev, cros_ec_rpmsg_callback, NULL, chinfo);
}
static int cros_ec_rpmsg_probe(struct rpmsg_device *rpdev)
{
struct device *dev = &rpdev->dev;
struct cros_ec_rpmsg *ec_rpmsg;
struct cros_ec_device *ec_dev;
int ret;
ec_dev = devm_kzalloc(dev, sizeof(*ec_dev), GFP_KERNEL);
if (!ec_dev)
@ -225,7 +238,18 @@ static int cros_ec_rpmsg_probe(struct rpmsg_device *rpdev)
INIT_WORK(&ec_rpmsg->host_event_work,
cros_ec_rpmsg_host_event_function);
return cros_ec_register(ec_dev);
ec_rpmsg->ept = cros_ec_rpmsg_create_ept(rpdev);
if (!ec_rpmsg->ept)
return -ENOMEM;
ret = cros_ec_register(ec_dev);
if (ret < 0) {
rpmsg_destroy_ept(ec_rpmsg->ept);
cancel_work_sync(&ec_rpmsg->host_event_work);
return ret;
}
return 0;
}
static void cros_ec_rpmsg_remove(struct rpmsg_device *rpdev)
@ -233,9 +257,30 @@ static void cros_ec_rpmsg_remove(struct rpmsg_device *rpdev)
struct cros_ec_device *ec_dev = dev_get_drvdata(&rpdev->dev);
struct cros_ec_rpmsg *ec_rpmsg = ec_dev->priv;
cros_ec_unregister(ec_dev);
rpmsg_destroy_ept(ec_rpmsg->ept);
cancel_work_sync(&ec_rpmsg->host_event_work);
}
#ifdef CONFIG_PM_SLEEP
static int cros_ec_rpmsg_suspend(struct device *dev)
{
struct cros_ec_device *ec_dev = dev_get_drvdata(dev);
return cros_ec_suspend(ec_dev);
}
static int cros_ec_rpmsg_resume(struct device *dev)
{
struct cros_ec_device *ec_dev = dev_get_drvdata(dev);
return cros_ec_resume(ec_dev);
}
#endif
static SIMPLE_DEV_PM_OPS(cros_ec_rpmsg_pm_ops, cros_ec_rpmsg_suspend,
cros_ec_rpmsg_resume);
static const struct of_device_id cros_ec_rpmsg_of_match[] = {
{ .compatible = "google,cros-ec-rpmsg", },
{ }
@ -246,10 +291,10 @@ static struct rpmsg_driver cros_ec_driver_rpmsg = {
.drv = {
.name = "cros-ec-rpmsg",
.of_match_table = cros_ec_rpmsg_of_match,
.pm = &cros_ec_rpmsg_pm_ops,
},
.probe = cros_ec_rpmsg_probe,
.remove = cros_ec_rpmsg_remove,
.callback = cros_ec_rpmsg_callback,
};
module_rpmsg_driver(cros_ec_driver_rpmsg);

12
drivers/platform/chrome/cros_ec_spi.c
View File

@ -6,9 +6,9 @@
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/of.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>
@ -785,6 +785,13 @@ static int cros_ec_spi_probe(struct spi_device *spi)
return 0;
}
static int cros_ec_spi_remove(struct spi_device *spi)
{
struct cros_ec_device *ec_dev = spi_get_drvdata(spi);
return cros_ec_unregister(ec_dev);
}
#ifdef CONFIG_PM_SLEEP
static int cros_ec_spi_suspend(struct device *dev)
{
@ -823,6 +830,7 @@ static struct spi_driver cros_ec_driver_spi = {
.pm = &cros_ec_spi_pm_ops,
},
.probe = cros_ec_spi_probe,
.remove = cros_ec_spi_remove,
.id_table = cros_ec_spi_id,
};

3
drivers/platform/chrome/cros_ec_sysfs.c
View File

@ -9,8 +9,9 @@
#include <linux/fs.h>
#include <linux/kobject.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/printk.h>
#include <linux/slab.h>

2
drivers/platform/chrome/cros_ec_trace.c
View File

@ -6,7 +6,7 @@
#define TRACE_SYMBOL(a) {a, #a}
// Generate the list using the following script:
// sed -n 's/^#define \(EC_CMD_[[:alnum:]_]*\)\s.*/\tTRACE_SYMBOL(\1), \\/p' include/linux/mfd/cros_ec_commands.h
// sed -n 's/^#define \(EC_CMD_[[:alnum:]_]*\)\s.*/\tTRACE_SYMBOL(\1), \\/p' include/linux/platform_data/cros_ec_commands.h
#define EC_CMDS \
TRACE_SYMBOL(EC_CMD_PROTO_VERSION), \
TRACE_SYMBOL(EC_CMD_HELLO), \

4
drivers/platform/chrome/cros_ec_trace.h
View File

@ -11,8 +11,10 @@
#if !defined(_CROS_EC_TRACE_H_) || defined(TRACE_HEADER_MULTI_READ)
#define _CROS_EC_TRACE_H_
#include <linux/bits.h>
#include <linux/types.h>
#include <linux/mfd/cros_ec.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/tracepoint.h>

3
drivers/platform/chrome/cros_ec_vbc.c
View File

@ -7,8 +7,9 @@
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/slab.h>
#define DRV_NAME "cros-ec-vbc"

8
drivers/platform/chrome/cros_usbpd_logger.c
View File

@ -6,10 +6,11 @@
*/
#include <linux/ktime.h>
#include <linux/math64.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/math64.h>
#include <linux/module.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/rtc.h>
@ -209,6 +210,9 @@ static int cros_usbpd_logger_probe(struct platform_device *pd)
/* Retrieve PD event logs periodically */
INIT_DELAYED_WORK(&logger->log_work, cros_usbpd_log_check);
logger->log_workqueue = create_singlethread_workqueue("cros_usbpd_log");
if (!logger->log_workqueue)
return -ENOMEM;
queue_delayed_work(logger->log_workqueue, &logger->log_work,
CROS_USBPD_LOG_UPDATE_DELAY);

64
drivers/platform/chrome/wilco_ec/telemetry.c
View File

@ -9,7 +9,7 @@
* the OS sends a command to the EC via a write() to a char device,
* and can read the response with a read(). The write() request is
* verified by the driver to ensure that it is performing only one
* of the whitelisted commands, and that no extraneous data is
* of the allowlisted commands, and that no extraneous data is
* being transmitted to the EC. The response is passed directly
* back to the reader with no modification.
*
@ -59,21 +59,10 @@ static DEFINE_IDA(telem_ida);
#define WILCO_EC_TELEM_GET_TEMP_INFO 0x95
#define WILCO_EC_TELEM_GET_TEMP_READ 0x2C
#define WILCO_EC_TELEM_GET_BATT_EXT_INFO 0x07
#define WILCO_EC_TELEM_GET_BATT_PPID_INFO 0x8A
#define TELEM_ARGS_SIZE_MAX 30
/**
* struct wilco_ec_telem_request - Telemetry command and arguments sent to EC.
* @command: One of WILCO_EC_TELEM_GET_* command codes.
* @reserved: Must be 0.
* @args: The first N bytes are one of telem_args_get_* structs, the rest is 0.
*/
struct wilco_ec_telem_request {
u8 command;
u8 reserved;
u8 args[TELEM_ARGS_SIZE_MAX];
} __packed;
/*
* The following telem_args_get_* structs are embedded within the |args| field
* of wilco_ec_telem_request.
@ -122,6 +111,32 @@ struct telem_args_get_batt_ext_info {
u8 var_args[5];
} __packed;
struct telem_args_get_batt_ppid_info {
u8 always1; /* Should always be 1 */
} __packed;
/**
* struct wilco_ec_telem_request - Telemetry command and arguments sent to EC.
* @command: One of WILCO_EC_TELEM_GET_* command codes.
* @reserved: Must be 0.
* @args: The first N bytes are one of telem_args_get_* structs, the rest is 0.
*/
struct wilco_ec_telem_request {
u8 command;
u8 reserved;
union {
u8 buf[TELEM_ARGS_SIZE_MAX];
struct telem_args_get_log get_log;
struct telem_args_get_version get_version;
struct telem_args_get_fan_info get_fan_info;
struct telem_args_get_diag_info get_diag_info;
struct telem_args_get_temp_info get_temp_info;
struct telem_args_get_temp_read get_temp_read;
struct telem_args_get_batt_ext_info get_batt_ext_info;
struct telem_args_get_batt_ppid_info get_batt_ppid_info;
} args;
} __packed;
/**
* check_telem_request() - Ensure that a request from userspace is valid.
* @rq: Request buffer copied from userspace.
@ -133,7 +148,7 @@ struct telem_args_get_batt_ext_info {
* We do not want to allow userspace to send arbitrary telemetry commands to
* the EC. Therefore we check to ensure that
* 1. The request follows the format of struct wilco_ec_telem_request.
* 2. The supplied command code is one of the whitelisted commands.
* 2. The supplied command code is one of the allowlisted commands.
* 3. The request only contains the necessary data for the header and arguments.
*/
static int check_telem_request(struct wilco_ec_telem_request *rq,
@ -146,25 +161,31 @@ static int check_telem_request(struct wilco_ec_telem_request *rq,
switch (rq->command) {
case WILCO_EC_TELEM_GET_LOG:
max_size += sizeof(struct telem_args_get_log);
max_size += sizeof(rq->args.get_log);
break;
case WILCO_EC_TELEM_GET_VERSION:
max_size += sizeof(struct telem_args_get_version);
max_size += sizeof(rq->args.get_version);
break;
case WILCO_EC_TELEM_GET_FAN_INFO:
max_size += sizeof(struct telem_args_get_fan_info);
max_size += sizeof(rq->args.get_fan_info);
break;
case WILCO_EC_TELEM_GET_DIAG_INFO:
max_size += sizeof(struct telem_args_get_diag_info);
max_size += sizeof(rq->args.get_diag_info);
break;
case WILCO_EC_TELEM_GET_TEMP_INFO:
max_size += sizeof(struct telem_args_get_temp_info);
max_size += sizeof(rq->args.get_temp_info);
break;
case WILCO_EC_TELEM_GET_TEMP_READ:
max_size += sizeof(struct telem_args_get_temp_read);
max_size += sizeof(rq->args.get_temp_read);
break;
case WILCO_EC_TELEM_GET_BATT_EXT_INFO:
max_size += sizeof(struct telem_args_get_batt_ext_info);
max_size += sizeof(rq->args.get_batt_ext_info);
break;
case WILCO_EC_TELEM_GET_BATT_PPID_INFO:
if (rq->args.get_batt_ppid_info.always1 != 1)
return -EINVAL;
max_size += sizeof(rq->args.get_batt_ppid_info);
break;
default:
return -EINVAL;
@ -250,6 +271,7 @@ static ssize_t telem_write(struct file *filp, const char __user *buf,
if (count > sizeof(sess_data->request))
return -EMSGSIZE;
memset(&sess_data->request, 0, sizeof(sess_data->request));
if (copy_from_user(&sess_data->request, buf, count))
return -EFAULT;
ret = check_telem_request(&sess_data->request, count);

2
drivers/power/supply/Kconfig
View File

@ -670,7 +670,7 @@ config CHARGER_RT9455
config CHARGER_CROS_USBPD
tristate "ChromeOS EC based USBPD charger"
depends on MFD_CROS_EC
depends on CROS_EC
default n
help
Say Y here to enable ChromeOS EC based USBPD charger

5
drivers/power/supply/cros_usbpd-charger.c
View File

@ -5,9 +5,10 @@
* Copyright (c) 2014 - 2018 Google, Inc
*/
#include <linux/module.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/slab.h>

2
drivers/pwm/Kconfig
View File

@ -145,7 +145,7 @@ config PWM_CRC
config PWM_CROS_EC
tristate "ChromeOS EC PWM driver"
depends on MFD_CROS_EC
depends on CROS_EC
help
PWM driver for exposing a PWM attached to the ChromeOS Embedded
Controller.

4
drivers/pwm/pwm-cros-ec.c
View File

@ -6,8 +6,8 @@
*/
#include <linux/module.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/pwm.h>
#include <linux/slab.h>

2
drivers/rtc/Kconfig
View File

@ -1274,7 +1274,7 @@ config RTC_DRV_ZYNQMP
config RTC_DRV_CROS_EC
tristate "Chrome OS EC RTC driver"
depends on MFD_CROS_EC
depends on CROS_EC
help
If you say yes here you will get support for the
Chrome OS Embedded Controller's RTC.

3
drivers/rtc/rtc-cros-ec.c
View File

@ -6,8 +6,9 @@
#include <linux/kernel.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/rtc.h>
#include <linux/slab.h>

2
include/Kbuild
View File

@ -310,7 +310,6 @@ header-test- += linux/mfd/adp5520.h
header-test- += linux/mfd/arizona/pdata.h
header-test- += linux/mfd/as3711.h
header-test- += linux/mfd/as3722.h
header-test- += linux/mfd/cros_ec_commands.h
header-test- += linux/mfd/da903x.h
header-test- += linux/mfd/da9055/pdata.h
header-test- += linux/mfd/da9063/pdata.h
@ -455,6 +454,7 @@ header-test- += linux/platform_data/ata-pxa.h
header-test- += linux/platform_data/atmel.h
header-test- += linux/platform_data/bh1770glc.h
header-test- += linux/platform_data/brcmfmac.h
header-test- += linux/platform_data/cros_ec_commands.h
header-test- += linux/platform_data/clk-u300.h
header-test- += linux/platform_data/cyttsp4.h
header-test- += linux/platform_data/dma-coh901318.h

3
include/linux/iio/common/cros_ec_sensors_core.h
View File

@ -10,7 +10,8 @@
#include <linux/iio/iio.h>
#include <linux/irqreturn.h>
#include <linux/mfd/cros_ec.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
enum {
CROS_EC_SENSOR_X,

292
include/linux/mfd/cros_ec.h
View File

@ -8,183 +8,11 @@
#ifndef __LINUX_MFD_CROS_EC_H
#define __LINUX_MFD_CROS_EC_H
#include <linux/cdev.h>
#include <linux/device.h>
#include <linux/notifier.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/mutex.h>
#define CROS_EC_DEV_NAME "cros_ec"
#define CROS_EC_DEV_FP_NAME "cros_fp"
#define CROS_EC_DEV_PD_NAME "cros_pd"
#define CROS_EC_DEV_TP_NAME "cros_tp"
#define CROS_EC_DEV_ISH_NAME "cros_ish"
#define CROS_EC_DEV_SCP_NAME "cros_scp"
/*
* The EC is unresponsive for a time after a reboot command. Add a
* simple delay to make sure that the bus stays locked.
*/
#define EC_REBOOT_DELAY_MS 50
/*
* Max bus-specific overhead incurred by request/responses.
* I2C requires 1 additional byte for requests.
* I2C requires 2 additional bytes for responses.
* SPI requires up to 32 additional bytes for responses.
*/
#define EC_PROTO_VERSION_UNKNOWN 0
#define EC_MAX_REQUEST_OVERHEAD 1
#define EC_MAX_RESPONSE_OVERHEAD 32
/*
* Command interface between EC and AP, for LPC, I2C and SPI interfaces.
*/
enum {
EC_MSG_TX_HEADER_BYTES = 3,
EC_MSG_TX_TRAILER_BYTES = 1,
EC_MSG_TX_PROTO_BYTES = EC_MSG_TX_HEADER_BYTES +
EC_MSG_TX_TRAILER_BYTES,
EC_MSG_RX_PROTO_BYTES = 3,
/* 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,
};
/**
* struct cros_ec_command - Information about a ChromeOS EC command.
* @version: Command version number (often 0).
* @command: Command to send (EC_CMD_...).
* @outsize: Outgoing length in bytes.
* @insize: Max number of bytes to accept from the EC.
* @result: EC's response to the command (separate from communication failure).
* @data: Where to put the incoming data from EC and outgoing data to EC.
*/
struct cros_ec_command {
uint32_t version;
uint32_t command;
uint32_t outsize;
uint32_t insize;
uint32_t result;
uint8_t data[0];
};
/**
* struct cros_ec_device - Information about a ChromeOS EC device.
* @phys_name: Name of physical comms layer (e.g. 'i2c-4').
* @dev: Device pointer for physical comms device
* @was_wake_device: True if this device was set to wake the system from
* sleep at the last suspend.
* @cros_class: The class structure for this device.
* @cmd_readmem: Direct read of the EC memory-mapped region, if supported.
* @offset: Is within EC_LPC_ADDR_MEMMAP region.
* @bytes: Number of bytes to read. zero means "read a string" (including
* the trailing '\0'). At most only EC_MEMMAP_SIZE bytes can be
* read. Caller must ensure that the buffer is large enough for the
* result when reading a string.
* @max_request: Max size of message requested.
* @max_response: Max size of message response.
* @max_passthru: Max sice of passthru message.
* @proto_version: The protocol version used for this device.
* @priv: Private data.
* @irq: Interrupt to use.
* @id: Device id.
* @din: Input buffer (for data from EC). This buffer will always be
* dword-aligned and include enough space for up to 7 word-alignment
* bytes also, so we can ensure that the body of the message is always
* dword-aligned (64-bit). We use this alignment to keep ARM and x86
* happy. Probably word alignment would be OK, there might be a small
* performance advantage to using dword.
* @dout: Output buffer (for data to EC). This buffer will always be
* dword-aligned and include enough space for up to 7 word-alignment
* bytes also, so we can ensure that the body of the message is always
* dword-aligned (64-bit). We use this alignment to keep ARM and x86
* happy. Probably word alignment would be OK, there might be a small
* performance advantage to using dword.
* @din_size: Size of din buffer to allocate (zero to use static din).
* @dout_size: Size of dout buffer to allocate (zero to use static dout).
* @wake_enabled: True if this device can wake the system from sleep.
* @suspended: True if this device had been suspended.
* @cmd_xfer: Send command to EC and get response.
* Returns the number of bytes received if the communication
* succeeded, but that doesn't mean the EC was happy with the
* command. The caller should check msg.result for the EC's result
* code.
* @pkt_xfer: Send packet to EC and get response.
* @lock: One transaction at a time.
* @mkbp_event_supported: True if this EC supports the MKBP event protocol.
* @host_sleep_v1: True if this EC supports the sleep v1 command.
* @event_notifier: Interrupt event notifier for transport devices.
* @event_data: Raw payload transferred with the MKBP event.
* @event_size: Size in bytes of the event data.
* @host_event_wake_mask: Mask of host events that cause wake from suspend.
*/
struct cros_ec_device {
/* These are used by other drivers that want to talk to the EC */
const char *phys_name;
struct device *dev;
bool was_wake_device;
struct class *cros_class;
int (*cmd_readmem)(struct cros_ec_device *ec, unsigned int offset,
unsigned int bytes, void *dest);
/* These are used to implement the platform-specific interface */
u16 max_request;
u16 max_response;
u16 max_passthru;
u16 proto_version;
void *priv;
int irq;
u8 *din;
u8 *dout;
int din_size;
int dout_size;
bool wake_enabled;
bool suspended;
int (*cmd_xfer)(struct cros_ec_device *ec,
struct cros_ec_command *msg);
int (*pkt_xfer)(struct cros_ec_device *ec,
struct cros_ec_command *msg);
struct mutex lock;
bool mkbp_event_supported;
bool host_sleep_v1;
struct blocking_notifier_head event_notifier;
struct ec_response_get_next_event_v1 event_data;
int event_size;
u32 host_event_wake_mask;
u32 last_resume_result;
};
/**
* struct cros_ec_sensor_platform - ChromeOS EC sensor platform information.
* @sensor_num: Id of the sensor, as reported by the EC.
*/
struct cros_ec_sensor_platform {
u8 sensor_num;
};
/**
* struct cros_ec_platform - ChromeOS EC platform information.
* @ec_name: Name of EC device (e.g. 'cros-ec', 'cros-pd', ...)
* used in /dev/ and sysfs.
* @cmd_offset: Offset to apply for each command. Set when
* registering a device behind another one.
*/
struct cros_ec_platform {
const char *ec_name;
u16 cmd_offset;
};
struct cros_ec_debugfs;
/**
* struct cros_ec_dev - ChromeOS EC device entry point.
* @class_dev: Device structure used in sysfs.
* @cdev: Character device structure in /dev.
* @ec_dev: cros_ec_device structure to talk to the physical device.
* @dev: Pointer to the platform device.
* @debug_info: cros_ec_debugfs structure for debugging information.
@ -194,7 +22,6 @@ struct cros_ec_debugfs;
*/
struct cros_ec_dev {
struct device class_dev;
struct cdev cdev;
struct cros_ec_device *ec_dev;
struct device *dev;
struct cros_ec_debugfs *debug_info;
@ -205,123 +32,4 @@ struct cros_ec_dev {
#define to_cros_ec_dev(dev) container_of(dev, struct cros_ec_dev, class_dev)
/**
* cros_ec_suspend() - Handle a suspend operation for the ChromeOS EC device.
* @ec_dev: Device to suspend.
*
* This can be called by drivers to handle a suspend event.
*
* Return: 0 on success or negative error code.
*/
int cros_ec_suspend(struct cros_ec_device *ec_dev);
/**
* cros_ec_resume() - Handle a resume operation for the ChromeOS EC device.
* @ec_dev: Device to resume.
*
* This can be called by drivers to handle a resume event.
*
* Return: 0 on success or negative error code.
*/
int cros_ec_resume(struct cros_ec_device *ec_dev);
/**
* cros_ec_prepare_tx() - Prepare an outgoing message in the output buffer.
* @ec_dev: Device to register.
* @msg: Message to write.
*
* This is intended to be used by all ChromeOS EC drivers, but at present
* only SPI uses it. Once LPC uses the same protocol it can start using it.
* I2C could use it now, with a refactor of the existing code.
*
* Return: 0 on success or negative error code.
*/
int cros_ec_prepare_tx(struct cros_ec_device *ec_dev,
struct cros_ec_command *msg);
/**
* cros_ec_check_result() - Check ec_msg->result.
* @ec_dev: EC device.
* @msg: Message to check.
*
* This is used by ChromeOS EC drivers to check the ec_msg->result for
* errors and to warn about them.
*
* Return: 0 on success or negative error code.
*/
int cros_ec_check_result(struct cros_ec_device *ec_dev,
struct cros_ec_command *msg);
/**
* cros_ec_cmd_xfer() - Send a command to the ChromeOS EC.
* @ec_dev: EC device.
* @msg: Message to write.
*
* Call this to send a command to the ChromeOS EC. This should be used
* instead of calling the EC's cmd_xfer() callback directly.
*
* Return: 0 on success or negative error code.
*/
int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev,
struct cros_ec_command *msg);
/**
* cros_ec_cmd_xfer_status() - Send a command to the ChromeOS EC.
* @ec_dev: EC device.
* @msg: Message to write.
*
* This function is identical to cros_ec_cmd_xfer, except it returns success
* status only if both the command was transmitted successfully and the EC
* replied with success status. It's not necessary to check msg->result when
* using this function.
*
* Return: The number of bytes transferred on success or negative error code.
*/
int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
struct cros_ec_command *msg);
/**
* cros_ec_register() - Register a new ChromeOS EC, using the provided info.
* @ec_dev: Device to register.
*
* Before calling this, allocate a pointer to a new device and then fill
* in all the fields up to the --private-- marker.
*
* Return: 0 on success or negative error code.
*/
int cros_ec_register(struct cros_ec_device *ec_dev);
/**
* cros_ec_query_all() - Query the protocol version supported by the
* ChromeOS EC.
* @ec_dev: Device to register.
*
* Return: 0 on success or negative error code.
*/
int cros_ec_query_all(struct cros_ec_device *ec_dev);
/**
* cros_ec_get_next_event() - Fetch next event from the ChromeOS EC.
* @ec_dev: Device to fetch event from.
* @wake_event: Pointer to a bool set to true upon return if the event might be
* treated as a wake event. Ignored if null.
*
* Return: negative error code on errors; 0 for no data; or else number of
* bytes received (i.e., an event was retrieved successfully). Event types are
* written out to @ec_dev->event_data.event_type on success.
*/
int cros_ec_get_next_event(struct cros_ec_device *ec_dev, bool *wake_event);
/**
* cros_ec_get_host_event() - Return a mask of event set by the ChromeOS EC.
* @ec_dev: Device to fetch event from.
*
* When MKBP is supported, when the EC raises an interrupt, we collect the
* events raised and call the functions in the ec notifier. This function
* is a helper to know which events are raised.
*
* Return: 0 on error or non-zero bitmask of one or more EC_HOST_EVENT_*.
*/
u32 cros_ec_get_host_event(struct cros_ec_device *ec_dev);
#endif /* __LINUX_MFD_CROS_EC_H */

13
drivers/mfd/cros_ec_dev.h → include/linux/platform_data/cros_ec_chardev.h
View File

@ -1,16 +1,18 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
/* SPDX-License-Identifier: GPL-2.0 */
/*
* cros_ec_dev - expose the Chrome OS Embedded Controller to userspace
* ChromeOS EC device interface.
*
* Copyright (C) 2014 Google, Inc.
*/
#ifndef _CROS_EC_DEV_H_
#define _CROS_EC_DEV_H_
#ifndef _UAPI_LINUX_CROS_EC_DEV_H_
#define _UAPI_LINUX_CROS_EC_DEV_H_
#include <linux/bits.h>
#include <linux/ioctl.h>
#include <linux/types.h>
#include <linux/mfd/cros_ec.h>
#include <linux/platform_data/cros_ec_commands.h>
#define CROS_EC_DEV_VERSION "1.0.0"
@ -31,5 +33,6 @@ struct cros_ec_readmem {
#define CROS_EC_DEV_IOC 0xEC
#define CROS_EC_DEV_IOCXCMD _IOWR(CROS_EC_DEV_IOC, 0, struct cros_ec_command)
#define CROS_EC_DEV_IOCRDMEM _IOWR(CROS_EC_DEV_IOC, 1, struct cros_ec_readmem)
#define CROS_EC_DEV_IOCEVENTMASK _IO(CROS_EC_DEV_IOC, 2)
#endif /* _CROS_EC_DEV_H_ */

0
include/linux/mfd/cros_ec_commands.h → include/linux/platform_data/cros_ec_commands.h
View File

319
include/linux/platform_data/cros_ec_proto.h Normal file
View File

@ -0,0 +1,319 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* ChromeOS Embedded Controller protocol interface.
*
* Copyright (C) 2012 Google, Inc
*/
#ifndef __LINUX_CROS_EC_PROTO_H
#define __LINUX_CROS_EC_PROTO_H
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/notifier.h>
#include <linux/platform_data/cros_ec_commands.h>
#define CROS_EC_DEV_NAME "cros_ec"
#define CROS_EC_DEV_FP_NAME "cros_fp"
#define CROS_EC_DEV_ISH_NAME "cros_ish"
#define CROS_EC_DEV_PD_NAME "cros_pd"
#define CROS_EC_DEV_SCP_NAME "cros_scp"
#define CROS_EC_DEV_TP_NAME "cros_tp"
/*
* The EC is unresponsive for a time after a reboot command. Add a
* simple delay to make sure that the bus stays locked.
*/
#define EC_REBOOT_DELAY_MS 50
/*
* Max bus-specific overhead incurred by request/responses.
* I2C requires 1 additional byte for requests.
* I2C requires 2 additional bytes for responses.
* SPI requires up to 32 additional bytes for responses.
*/
#define EC_PROTO_VERSION_UNKNOWN 0
#define EC_MAX_REQUEST_OVERHEAD 1
#define EC_MAX_RESPONSE_OVERHEAD 32
/*
* Command interface between EC and AP, for LPC, I2C and SPI interfaces.
*/
enum {
EC_MSG_TX_HEADER_BYTES = 3,
EC_MSG_TX_TRAILER_BYTES = 1,
EC_MSG_TX_PROTO_BYTES = EC_MSG_TX_HEADER_BYTES +
EC_MSG_TX_TRAILER_BYTES,
EC_MSG_RX_PROTO_BYTES = 3,
/* 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,
};
/**
* struct cros_ec_command - Information about a ChromeOS EC command.
* @version: Command version number (often 0).
* @command: Command to send (EC_CMD_...).
* @outsize: Outgoing length in bytes.
* @insize: Max number of bytes to accept from the EC.
* @result: EC's response to the command (separate from communication failure).
* @data: Where to put the incoming data from EC and outgoing data to EC.
*/
struct cros_ec_command {
uint32_t version;
uint32_t command;
uint32_t outsize;
uint32_t insize;
uint32_t result;
uint8_t data[0];
};
/**
* struct cros_ec_device - Information about a ChromeOS EC device.
* @phys_name: Name of physical comms layer (e.g. 'i2c-4').
* @dev: Device pointer for physical comms device
* @was_wake_device: True if this device was set to wake the system from
* sleep at the last suspend.
* @cros_class: The class structure for this device.
* @cmd_readmem: Direct read of the EC memory-mapped region, if supported.
* @offset: Is within EC_LPC_ADDR_MEMMAP region.
* @bytes: Number of bytes to read. zero means "read a string" (including
* the trailing '\0'). At most only EC_MEMMAP_SIZE bytes can be
* read. Caller must ensure that the buffer is large enough for the
* result when reading a string.
* @max_request: Max size of message requested.
* @max_response: Max size of message response.
* @max_passthru: Max sice of passthru message.
* @proto_version: The protocol version used for this device.
* @priv: Private data.
* @irq: Interrupt to use.
* @id: Device id.
* @din: Input buffer (for data from EC). This buffer will always be
* dword-aligned and include enough space for up to 7 word-alignment
* bytes also, so we can ensure that the body of the message is always
* dword-aligned (64-bit). We use this alignment to keep ARM and x86
* happy. Probably word alignment would be OK, there might be a small
* performance advantage to using dword.
* @dout: Output buffer (for data to EC). This buffer will always be
* dword-aligned and include enough space for up to 7 word-alignment
* bytes also, so we can ensure that the body of the message is always
* dword-aligned (64-bit). We use this alignment to keep ARM and x86
* happy. Probably word alignment would be OK, there might be a small
* performance advantage to using dword.
* @din_size: Size of din buffer to allocate (zero to use static din).
* @dout_size: Size of dout buffer to allocate (zero to use static dout).
* @wake_enabled: True if this device can wake the system from sleep.
* @suspended: True if this device had been suspended.
* @cmd_xfer: Send command to EC and get response.
* Returns the number of bytes received if the communication
* succeeded, but that doesn't mean the EC was happy with the
* command. The caller should check msg.result for the EC's result
* code.
* @pkt_xfer: Send packet to EC and get response.
* @lock: One transaction at a time.
* @mkbp_event_supported: True if this EC supports the MKBP event protocol.
* @host_sleep_v1: True if this EC supports the sleep v1 command.
* @event_notifier: Interrupt event notifier for transport devices.
* @event_data: Raw payload transferred with the MKBP event.
* @event_size: Size in bytes of the event data.
* @host_event_wake_mask: Mask of host events that cause wake from suspend.
* @ec: The platform_device used by the mfd driver to interface with the
* main EC.
* @pd: The platform_device used by the mfd driver to interface with the
* PD behind an EC.
*/
struct cros_ec_device {
/* These are used by other drivers that want to talk to the EC */
const char *phys_name;
struct device *dev;
bool was_wake_device;
struct class *cros_class;
int (*cmd_readmem)(struct cros_ec_device *ec, unsigned int offset,
unsigned int bytes, void *dest);
/* These are used to implement the platform-specific interface */
u16 max_request;
u16 max_response;
u16 max_passthru;
u16 proto_version;
void *priv;
int irq;
u8 *din;
u8 *dout;
int din_size;
int dout_size;
bool wake_enabled;
bool suspended;
int (*cmd_xfer)(struct cros_ec_device *ec,
struct cros_ec_command *msg);
int (*pkt_xfer)(struct cros_ec_device *ec,
struct cros_ec_command *msg);
struct mutex lock;
bool mkbp_event_supported;
bool host_sleep_v1;
struct blocking_notifier_head event_notifier;
struct ec_response_get_next_event_v1 event_data;
int event_size;
u32 host_event_wake_mask;
u32 last_resume_result;
/* The platform devices used by the mfd driver */
struct platform_device *ec;
struct platform_device *pd;
};
/**
* struct cros_ec_sensor_platform - ChromeOS EC sensor platform information.
* @sensor_num: Id of the sensor, as reported by the EC.
*/
struct cros_ec_sensor_platform {
u8 sensor_num;
};
/**
* struct cros_ec_platform - ChromeOS EC platform information.
* @ec_name: Name of EC device (e.g. 'cros-ec', 'cros-pd', ...)
* used in /dev/ and sysfs.
* @cmd_offset: Offset to apply for each command. Set when
* registering a device behind another one.
*/
struct cros_ec_platform {
const char *ec_name;
u16 cmd_offset;
};
/**
* cros_ec_suspend() - Handle a suspend operation for the ChromeOS EC device.
* @ec_dev: Device to suspend.
*
* This can be called by drivers to handle a suspend event.
*
* Return: 0 on success or negative error code.
*/
int cros_ec_suspend(struct cros_ec_device *ec_dev);
/**
* cros_ec_resume() - Handle a resume operation for the ChromeOS EC device.
* @ec_dev: Device to resume.
*
* This can be called by drivers to handle a resume event.
*
* Return: 0 on success or negative error code.
*/
int cros_ec_resume(struct cros_ec_device *ec_dev);
/**
* cros_ec_prepare_tx() - Prepare an outgoing message in the output buffer.
* @ec_dev: Device to register.
* @msg: Message to write.
*
* This is intended to be used by all ChromeOS EC drivers, but at present
* only SPI uses it. Once LPC uses the same protocol it can start using it.
* I2C could use it now, with a refactor of the existing code.
*
* Return: 0 on success or negative error code.
*/
int cros_ec_prepare_tx(struct cros_ec_device *ec_dev,
struct cros_ec_command *msg);
/**
* cros_ec_check_result() - Check ec_msg->result.
* @ec_dev: EC device.
* @msg: Message to check.
*
* This is used by ChromeOS EC drivers to check the ec_msg->result for
* errors and to warn about them.
*
* Return: 0 on success or negative error code.
*/
int cros_ec_check_result(struct cros_ec_device *ec_dev,
struct cros_ec_command *msg);
/**
* cros_ec_cmd_xfer() - Send a command to the ChromeOS EC.
* @ec_dev: EC device.
* @msg: Message to write.
*
* Call this to send a command to the ChromeOS EC. This should be used
* instead of calling the EC's cmd_xfer() callback directly.
*
* Return: 0 on success or negative error code.
*/
int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev,
struct cros_ec_command *msg);
/**
* cros_ec_cmd_xfer_status() - Send a command to the ChromeOS EC.
* @ec_dev: EC device.
* @msg: Message to write.
*
* This function is identical to cros_ec_cmd_xfer, except it returns success
* status only if both the command was transmitted successfully and the EC
* replied with success status. It's not necessary to check msg->result when
* using this function.
*
* Return: The number of bytes transferred on success or negative error code.
*/
int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
struct cros_ec_command *msg);
/**
* cros_ec_register() - Register a new ChromeOS EC, using the provided info.
* @ec_dev: Device to register.
*
* Before calling this, allocate a pointer to a new device and then fill
* in all the fields up to the --private-- marker.
*
* Return: 0 on success or negative error code.
*/
int cros_ec_register(struct cros_ec_device *ec_dev);
/**
* cros_ec_unregister() - Remove a ChromeOS EC.
* @ec_dev: Device to unregister.
*
* Call this to deregister a ChromeOS EC, then clean up any private data.
*
* Return: 0 on success or negative error code.
*/
int cros_ec_unregister(struct cros_ec_device *ec_dev);
/**
* cros_ec_query_all() - Query the protocol version supported by the
* ChromeOS EC.
* @ec_dev: Device to register.
*
* Return: 0 on success or negative error code.
*/
int cros_ec_query_all(struct cros_ec_device *ec_dev);
/**
* cros_ec_get_next_event() - Fetch next event from the ChromeOS EC.
* @ec_dev: Device to fetch event from.
* @wake_event: Pointer to a bool set to true upon return if the event might be
* treated as a wake event. Ignored if null.
*
* Return: negative error code on errors; 0 for no data; or else number of
* bytes received (i.e., an event was retrieved successfully). Event types are
* written out to @ec_dev->event_data.event_type on success.
*/
int cros_ec_get_next_event(struct cros_ec_device *ec_dev, bool *wake_event);
/**
* cros_ec_get_host_event() - Return a mask of event set by the ChromeOS EC.
* @ec_dev: Device to fetch event from.
*
* When MKBP is supported, when the EC raises an interrupt, we collect the
* events raised and call the functions in the ec notifier. This function
* is a helper to know which events are raised.
*
* Return: 0 on error or non-zero bitmask of one or more EC_HOST_EVENT_*.
*/
u32 cros_ec_get_host_event(struct cros_ec_device *ec_dev);
#endif /* __LINUX_CROS_EC_PROTO_H */

4
sound/soc/codecs/Kconfig
View File

@ -51,7 +51,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_BT_SCO
select SND_SOC_BD28623
select SND_SOC_CQ0093VC
select SND_SOC_CROS_EC_CODEC if MFD_CROS_EC
select SND_SOC_CROS_EC_CODEC if CROS_EC
select SND_SOC_CS35L32 if I2C
select SND_SOC_CS35L33 if I2C
select SND_SOC_CS35L34 if I2C
@ -477,7 +477,7 @@ config SND_SOC_CQ0093VC
config SND_SOC_CROS_EC_CODEC
tristate "codec driver for ChromeOS EC"
depends on MFD_CROS_EC
depends on CROS_EC
help
If you say yes here you will get support for the
ChromeOS Embedded Controller's Audio Codec.

4
sound/soc/codecs/cros_ec_codec.c
View File

@ -9,9 +9,9 @@
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/mfd/cros_ec.h>
#include <linux/mfd/cros_ec_commands.h>
#include <linux/module.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>

2
sound/soc/qcom/Kconfig
View File

@ -99,7 +99,7 @@ config SND_SOC_MSM8996
config SND_SOC_SDM845
tristate "SoC Machine driver for SDM845 boards"
depends on QCOM_APR && MFD_CROS_EC && I2C
depends on QCOM_APR && CROS_EC && I2C
select SND_SOC_QDSP6
select SND_SOC_QCOM_COMMON
select SND_SOC_RT5663