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-rw-r--r--drivers/platform/chrome/Kconfig10
-rw-r--r--drivers/platform/chrome/Makefile1
-rw-r--r--drivers/platform/chrome/cros_ec_dev.c189
-rw-r--r--drivers/platform/chrome/cros_ec_dev.h7
-rw-r--r--drivers/platform/chrome/cros_ec_lightbar.c217
-rw-r--r--drivers/platform/chrome/cros_ec_lpc.c85
-rw-r--r--drivers/platform/chrome/cros_ec_proto.c382
-rw-r--r--drivers/platform/chrome/cros_ec_sysfs.c178
8 files changed, 840 insertions, 229 deletions
diff --git a/drivers/platform/chrome/Kconfig b/drivers/platform/chrome/Kconfig
index 2a6531a5f..3271cd1ab 100644
--- a/drivers/platform/chrome/Kconfig
+++ b/drivers/platform/chrome/Kconfig
@@ -4,7 +4,6 @@
menuconfig CHROME_PLATFORMS
bool "Platform support for Chrome hardware"
- depends on X86 || ARM
---help---
Say Y here to get to see options for platform support for
various Chromebooks and Chromeboxes. This option alone does
@@ -40,7 +39,7 @@ config CHROMEOS_PSTORE
config CROS_EC_CHARDEV
tristate "Chrome OS Embedded Controller userspace device interface"
- depends on MFD_CROS_EC
+ depends on CROS_EC_PROTO
---help---
This driver adds support to talk with the ChromeOS EC from userspace.
@@ -49,7 +48,7 @@ config CROS_EC_CHARDEV
config CROS_EC_LPC
tristate "ChromeOS Embedded Controller (LPC)"
- depends on MFD_CROS_EC && (X86 || COMPILE_TEST)
+ depends on MFD_CROS_EC && CROS_EC_PROTO && (X86 || COMPILE_TEST)
help
If you say Y here, you get support for talking to the ChromeOS EC
over an LPC bus. This uses a simple byte-level protocol with a
@@ -59,4 +58,9 @@ config CROS_EC_LPC
To compile this driver as a module, choose M here: the
module will be called cros_ec_lpc.
+config CROS_EC_PROTO
+ bool
+ help
+ ChromeOS EC communication protocol helpers.
+
endif # CHROMEOS_PLATFORMS
diff --git a/drivers/platform/chrome/Makefile b/drivers/platform/chrome/Makefile
index bd8d8601e..4a11b010f 100644
--- a/drivers/platform/chrome/Makefile
+++ b/drivers/platform/chrome/Makefile
@@ -4,3 +4,4 @@ obj-$(CONFIG_CHROMEOS_PSTORE) += chromeos_pstore.o
cros_ec_devs-objs := cros_ec_dev.o cros_ec_sysfs.o cros_ec_lightbar.o
obj-$(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
diff --git a/drivers/platform/chrome/cros_ec_dev.c b/drivers/platform/chrome/cros_ec_dev.c
index 6090d0b28..e8fcdc237 100644
--- a/drivers/platform/chrome/cros_ec_dev.c
+++ b/drivers/platform/chrome/cros_ec_dev.c
@@ -20,44 +20,59 @@
#include <linux/fs.h>
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/slab.h>
#include <linux/uaccess.h>
#include "cros_ec_dev.h"
/* Device variables */
#define CROS_MAX_DEV 128
-static struct class *cros_class;
static int ec_major;
+static const struct attribute_group *cros_ec_groups[] = {
+ &cros_ec_attr_group,
+ &cros_ec_lightbar_attr_group,
+ NULL,
+};
+
+static struct class cros_class = {
+ .owner = THIS_MODULE,
+ .name = "chromeos",
+ .dev_groups = cros_ec_groups,
+};
+
/* Basic communication */
-static int ec_get_version(struct cros_ec_device *ec, char *str, int maxlen)
+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 = {
- .version = 0,
- .command = EC_CMD_GET_VERSION,
- .outdata = { 0 },
- .outsize = 0,
- .indata = { 0 },
- .insize = sizeof(*resp),
- };
+ struct cros_ec_command *msg;
int ret;
- ret = cros_ec_cmd_xfer(ec, &msg);
+ msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ msg->version = 0;
+ msg->command = EC_CMD_GET_VERSION + ec->cmd_offset;
+ msg->insize = sizeof(*resp);
+ msg->outsize = 0;
+
+ ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
- return ret;
+ goto exit;
- if (msg.result != EC_RES_SUCCESS) {
+ if (msg->result != EC_RES_SUCCESS) {
snprintf(str, maxlen,
"%s\nUnknown EC version: EC returned %d\n",
- CROS_EC_DEV_VERSION, msg.result);
- return 0;
+ CROS_EC_DEV_VERSION, msg->result);
+ ret = -EINVAL;
+ goto exit;
}
- resp = (struct ec_response_get_version *)msg.indata;
+ resp = (struct ec_response_get_version *)msg->data;
if (resp->current_image >= ARRAY_SIZE(current_image_name))
resp->current_image = 3; /* invalid */
@@ -65,14 +80,19 @@ static int ec_get_version(struct cros_ec_device *ec, char *str, int maxlen)
resp->version_string_ro, resp->version_string_rw,
current_image_name[resp->current_image]);
- return 0;
+ ret = 0;
+exit:
+ kfree(msg);
+ return ret;
}
/* Device file ops */
static int ec_device_open(struct inode *inode, struct file *filp)
{
- filp->private_data = container_of(inode->i_cdev,
- struct cros_ec_device, cdev);
+ 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;
}
@@ -84,7 +104,7 @@ static int ec_device_release(struct inode *inode, struct file *filp)
static ssize_t ec_device_read(struct file *filp, char __user *buffer,
size_t length, loff_t *offset)
{
- struct cros_ec_device *ec = filp->private_data;
+ struct cros_ec_dev *ec = filp->private_data;
char msg[sizeof(struct ec_response_get_version) +
sizeof(CROS_EC_DEV_VERSION)];
size_t count;
@@ -107,38 +127,53 @@ static ssize_t ec_device_read(struct file *filp, char __user *buffer,
}
/* Ioctls */
-static long ec_device_ioctl_xcmd(struct cros_ec_device *ec, void __user *arg)
+static long ec_device_ioctl_xcmd(struct cros_ec_dev *ec, void __user *arg)
{
long ret;
- struct cros_ec_command s_cmd = { };
+ struct cros_ec_command u_cmd;
+ struct cros_ec_command *s_cmd;
- if (copy_from_user(&s_cmd, arg, sizeof(s_cmd)))
+ if (copy_from_user(&u_cmd, arg, sizeof(u_cmd)))
return -EFAULT;
- ret = cros_ec_cmd_xfer(ec, &s_cmd);
+ 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;
+ }
+
+ 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)
- return ret;
-
- if (copy_to_user(arg, &s_cmd, sizeof(s_cmd)))
- return -EFAULT;
+ goto exit;
- return 0;
+ if (copy_to_user(arg, s_cmd, sizeof(*s_cmd) + u_cmd.insize))
+ ret = -EFAULT;
+exit:
+ kfree(s_cmd);
+ return ret;
}
-static long ec_device_ioctl_readmem(struct cros_ec_device *ec, void __user *arg)
+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->cmd_readmem)
+ if (!ec_dev->cmd_readmem)
return -ENOTTY;
if (copy_from_user(&s_mem, arg, sizeof(s_mem)))
return -EFAULT;
- num = ec->cmd_readmem(ec, s_mem.offset, s_mem.bytes, s_mem.buffer);
+ num = ec_dev->cmd_readmem(ec_dev, s_mem.offset, s_mem.bytes,
+ s_mem.buffer);
if (num <= 0)
return num;
@@ -151,7 +186,7 @@ static long ec_device_ioctl_readmem(struct cros_ec_device *ec, void __user *arg)
static long ec_device_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
- struct cros_ec_device *ec = filp->private_data;
+ struct cros_ec_dev *ec = filp->private_data;
if (_IOC_TYPE(cmd) != CROS_EC_DEV_IOC)
return -ENOTTY;
@@ -174,45 +209,81 @@ static const struct file_operations fops = {
.unlocked_ioctl = ec_device_ioctl,
};
+static void __remove(struct device *dev)
+{
+ struct cros_ec_dev *ec = container_of(dev, struct cros_ec_dev,
+ class_dev);
+ kfree(ec);
+}
+
static int ec_device_probe(struct platform_device *pdev)
{
- struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent);
- int retval = -ENOTTY;
- dev_t devno = MKDEV(ec_major, 0);
+ int retval = -ENOMEM;
+ struct device *dev = &pdev->dev;
+ struct cros_ec_platform *ec_platform = dev_get_platdata(dev);
+ dev_t devno = MKDEV(ec_major, pdev->id);
+ struct cros_ec_dev *ec = kzalloc(sizeof(*ec), GFP_KERNEL);
+
+ if (!ec)
+ return retval;
- /* Instantiate it (and remember the EC) */
+ dev_set_drvdata(dev, ec);
+ ec->ec_dev = dev_get_drvdata(dev->parent);
+ ec->dev = dev;
+ ec->cmd_offset = ec_platform->cmd_offset;
+ device_initialize(&ec->class_dev);
cdev_init(&ec->cdev, &fops);
+ /*
+ * Add the character device
+ * Link cdev to the class device to be sure device is not used
+ * before unbinding it.
+ */
+ ec->cdev.kobj.parent = &ec->class_dev.kobj;
retval = cdev_add(&ec->cdev, devno, 1);
if (retval) {
- dev_err(&pdev->dev, ": failed to add character device\n");
- return retval;
+ dev_err(dev, ": failed to add character device\n");
+ goto cdev_add_failed;
}
- ec->vdev = device_create(cros_class, NULL, devno, ec,
- CROS_EC_DEV_NAME);
- if (IS_ERR(ec->vdev)) {
- retval = PTR_ERR(ec->vdev);
- dev_err(&pdev->dev, ": failed to create device\n");
- cdev_del(&ec->cdev);
- return retval;
+ /*
+ * Add the class device
+ * Link to the character device for creating the /dev entry
+ * in devtmpfs.
+ */
+ ec->class_dev.devt = ec->cdev.dev;
+ ec->class_dev.class = &cros_class;
+ ec->class_dev.parent = dev;
+ ec->class_dev.release = __remove;
+
+ retval = dev_set_name(&ec->class_dev, "%s", ec_platform->ec_name);
+ if (retval) {
+ dev_err(dev, "dev_set_name failed => %d\n", retval);
+ goto set_named_failed;
}
- /* Initialize extra interfaces */
- ec_dev_sysfs_init(ec);
- ec_dev_lightbar_init(ec);
+ retval = device_add(&ec->class_dev);
+ if (retval) {
+ dev_err(dev, "device_register failed => %d\n", retval);
+ goto dev_reg_failed;
+ }
return 0;
+
+dev_reg_failed:
+set_named_failed:
+ dev_set_drvdata(dev, NULL);
+ cdev_del(&ec->cdev);
+cdev_add_failed:
+ kfree(ec);
+ return retval;
}
static int ec_device_remove(struct platform_device *pdev)
{
- struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent);
-
- ec_dev_lightbar_remove(ec);
- ec_dev_sysfs_remove(ec);
- device_destroy(cros_class, MKDEV(ec_major, 0));
+ struct cros_ec_dev *ec = dev_get_drvdata(&pdev->dev);
cdev_del(&ec->cdev);
+ device_unregister(&ec->class_dev);
return 0;
}
@@ -229,10 +300,10 @@ static int __init cros_ec_dev_init(void)
int ret;
dev_t dev = 0;
- cros_class = class_create(THIS_MODULE, "chromeos");
- if (IS_ERR(cros_class)) {
+ ret = class_register(&cros_class);
+ if (ret) {
pr_err(CROS_EC_DEV_NAME ": failed to register device class\n");
- return PTR_ERR(cros_class);
+ return ret;
}
/* Get a range of minor numbers (starting with 0) to work with */
@@ -254,7 +325,7 @@ static int __init cros_ec_dev_init(void)
failed_devreg:
unregister_chrdev_region(MKDEV(ec_major, 0), CROS_MAX_DEV);
failed_chrdevreg:
- class_destroy(cros_class);
+ class_unregister(&cros_class);
return ret;
}
@@ -262,7 +333,7 @@ static void __exit cros_ec_dev_exit(void)
{
platform_driver_unregister(&cros_ec_dev_driver);
unregister_chrdev(ec_major, CROS_EC_DEV_NAME);
- class_destroy(cros_class);
+ class_unregister(&cros_class);
}
module_init(cros_ec_dev_init);
diff --git a/drivers/platform/chrome/cros_ec_dev.h b/drivers/platform/chrome/cros_ec_dev.h
index 45d67f7e5..bfd2c84c3 100644
--- a/drivers/platform/chrome/cros_ec_dev.h
+++ b/drivers/platform/chrome/cros_ec_dev.h
@@ -24,7 +24,6 @@
#include <linux/types.h>
#include <linux/mfd/cros_ec.h>
-#define CROS_EC_DEV_NAME "cros_ec"
#define CROS_EC_DEV_VERSION "1.0.0"
/*
@@ -44,10 +43,4 @@ struct cros_ec_readmem {
#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)
-void ec_dev_sysfs_init(struct cros_ec_device *);
-void ec_dev_sysfs_remove(struct cros_ec_device *);
-
-void ec_dev_lightbar_init(struct cros_ec_device *);
-void ec_dev_lightbar_remove(struct cros_ec_device *);
-
#endif /* _CROS_EC_DEV_H_ */
diff --git a/drivers/platform/chrome/cros_ec_lightbar.c b/drivers/platform/chrome/cros_ec_lightbar.c
index b4ff47a90..144e09df9 100644
--- a/drivers/platform/chrome/cros_ec_lightbar.c
+++ b/drivers/platform/chrome/cros_ec_lightbar.c
@@ -31,6 +31,7 @@
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/uaccess.h>
+#include <linux/slab.h>
#include "cros_ec_dev.h"
@@ -91,55 +92,81 @@ out:
return ret;
}
-#define INIT_MSG(P, R) { \
- .command = EC_CMD_LIGHTBAR_CMD, \
- .outsize = sizeof(*P), \
- .insize = sizeof(*R), \
- }
+static struct cros_ec_command *alloc_lightbar_cmd_msg(struct cros_ec_dev *ec)
+{
+ struct cros_ec_command *msg;
+ int len;
+
+ len = max(sizeof(struct ec_params_lightbar),
+ sizeof(struct ec_response_lightbar));
+
+ msg = kmalloc(sizeof(*msg) + len, GFP_KERNEL);
+ if (!msg)
+ return NULL;
+
+ msg->version = 0;
+ msg->command = EC_CMD_LIGHTBAR_CMD + ec->cmd_offset;
+ msg->outsize = sizeof(struct ec_params_lightbar);
+ msg->insize = sizeof(struct ec_response_lightbar);
+
+ return msg;
+}
-static int get_lightbar_version(struct cros_ec_device *ec,
+static int get_lightbar_version(struct cros_ec_dev *ec,
uint32_t *ver_ptr, uint32_t *flg_ptr)
{
struct ec_params_lightbar *param;
struct ec_response_lightbar *resp;
- struct cros_ec_command msg = INIT_MSG(param, resp);
+ struct cros_ec_command *msg;
int ret;
- param = (struct ec_params_lightbar *)msg.outdata;
- param->cmd = LIGHTBAR_CMD_VERSION;
- ret = cros_ec_cmd_xfer(ec, &msg);
- if (ret < 0)
+ msg = alloc_lightbar_cmd_msg(ec);
+ if (!msg)
return 0;
- switch (msg.result) {
+ param = (struct ec_params_lightbar *)msg->data;
+ param->cmd = LIGHTBAR_CMD_VERSION;
+ ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
+ if (ret < 0) {
+ ret = 0;
+ goto exit;
+ }
+
+ switch (msg->result) {
case EC_RES_INVALID_PARAM:
/* Pixel had no version command. */
if (ver_ptr)
*ver_ptr = 0;
if (flg_ptr)
*flg_ptr = 0;
- return 1;
+ ret = 1;
+ goto exit;
case EC_RES_SUCCESS:
- resp = (struct ec_response_lightbar *)msg.indata;
+ resp = (struct ec_response_lightbar *)msg->data;
/* Future devices w/lightbars should implement this command */
if (ver_ptr)
*ver_ptr = resp->version.num;
if (flg_ptr)
*flg_ptr = resp->version.flags;
- return 1;
+ ret = 1;
+ goto exit;
}
/* Anything else (ie, EC_RES_INVALID_COMMAND) - no lightbar */
- return 0;
+ ret = 0;
+exit:
+ kfree(msg);
+ return ret;
}
static ssize_t version_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- uint32_t version, flags;
- struct cros_ec_device *ec = dev_get_drvdata(dev);
+ uint32_t version = 0, flags = 0;
+ struct cros_ec_dev *ec = container_of(dev,
+ struct cros_ec_dev, class_dev);
int ret;
ret = lb_throttle();
@@ -158,30 +185,39 @@ static ssize_t brightness_store(struct device *dev,
const char *buf, size_t count)
{
struct ec_params_lightbar *param;
- struct ec_response_lightbar *resp;
- struct cros_ec_command msg = INIT_MSG(param, resp);
+ struct cros_ec_command *msg;
int ret;
unsigned int val;
- struct cros_ec_device *ec = dev_get_drvdata(dev);
+ struct cros_ec_dev *ec = container_of(dev,
+ struct cros_ec_dev, class_dev);
if (kstrtouint(buf, 0, &val))
return -EINVAL;
- param = (struct ec_params_lightbar *)msg.outdata;
- param->cmd = LIGHTBAR_CMD_BRIGHTNESS;
- param->brightness.num = val;
+ msg = alloc_lightbar_cmd_msg(ec);
+ if (!msg)
+ return -ENOMEM;
+
+ param = (struct ec_params_lightbar *)msg->data;
+ param->cmd = LIGHTBAR_CMD_SET_BRIGHTNESS;
+ param->set_brightness.num = val;
ret = lb_throttle();
if (ret)
- return ret;
+ goto exit;
- ret = cros_ec_cmd_xfer(ec, &msg);
+ ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
- return ret;
+ goto exit;
- if (msg.result != EC_RES_SUCCESS)
- return -EINVAL;
+ if (msg->result != EC_RES_SUCCESS) {
+ ret = -EINVAL;
+ goto exit;
+ }
- return count;
+ ret = count;
+exit:
+ kfree(msg);
+ return ret;
}
@@ -196,12 +232,16 @@ static ssize_t led_rgb_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct ec_params_lightbar *param;
- struct ec_response_lightbar *resp;
- struct cros_ec_command msg = INIT_MSG(param, resp);
- struct cros_ec_device *ec = dev_get_drvdata(dev);
+ struct cros_ec_command *msg;
+ struct cros_ec_dev *ec = container_of(dev,
+ struct cros_ec_dev, class_dev);
unsigned int val[4];
int ret, i = 0, j = 0, ok = 0;
+ msg = alloc_lightbar_cmd_msg(ec);
+ if (!msg)
+ return -ENOMEM;
+
do {
/* Skip any whitespace */
while (*buf && isspace(*buf))
@@ -215,12 +255,12 @@ static ssize_t led_rgb_store(struct device *dev, struct device_attribute *attr,
return -EINVAL;
if (i == 4) {
- param = (struct ec_params_lightbar *)msg.outdata;
- param->cmd = LIGHTBAR_CMD_RGB;
- param->rgb.led = val[0];
- param->rgb.red = val[1];
- param->rgb.green = val[2];
- param->rgb.blue = val[3];
+ param = (struct ec_params_lightbar *)msg->data;
+ param->cmd = LIGHTBAR_CMD_SET_RGB;
+ param->set_rgb.led = val[0];
+ param->set_rgb.red = val[1];
+ param->set_rgb.green = val[2];
+ param->set_rgb.blue = val[3];
/*
* Throttle only the first of every four transactions,
* so that the user can update all four LEDs at once.
@@ -231,12 +271,14 @@ static ssize_t led_rgb_store(struct device *dev, struct device_attribute *attr,
return ret;
}
- ret = cros_ec_cmd_xfer(ec, &msg);
+ ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
- return ret;
+ goto exit;
- if (msg.result != EC_RES_SUCCESS)
- return -EINVAL;
+ if (msg->result != EC_RES_SUCCESS) {
+ ret = -EINVAL;
+ goto exit;
+ }
i = 0;
ok = 1;
@@ -248,6 +290,8 @@ static ssize_t led_rgb_store(struct device *dev, struct device_attribute *attr,
} while (*buf);
+exit:
+ kfree(msg);
return (ok && i == 0) ? count : -EINVAL;
}
@@ -261,41 +305,56 @@ static ssize_t sequence_show(struct device *dev,
{
struct ec_params_lightbar *param;
struct ec_response_lightbar *resp;
- struct cros_ec_command msg = INIT_MSG(param, resp);
+ struct cros_ec_command *msg;
int ret;
- struct cros_ec_device *ec = dev_get_drvdata(dev);
+ struct cros_ec_dev *ec = container_of(dev,
+ struct cros_ec_dev, class_dev);
+
+ msg = alloc_lightbar_cmd_msg(ec);
+ if (!msg)
+ return -ENOMEM;
- param = (struct ec_params_lightbar *)msg.outdata;
+ param = (struct ec_params_lightbar *)msg->data;
param->cmd = LIGHTBAR_CMD_GET_SEQ;
ret = lb_throttle();
if (ret)
- return ret;
+ goto exit;
- ret = cros_ec_cmd_xfer(ec, &msg);
+ ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
- return ret;
+ goto exit;
- if (msg.result != EC_RES_SUCCESS)
- return scnprintf(buf, PAGE_SIZE,
- "ERROR: EC returned %d\n", msg.result);
+ if (msg->result != EC_RES_SUCCESS) {
+ ret = scnprintf(buf, PAGE_SIZE,
+ "ERROR: EC returned %d\n", msg->result);
+ goto exit;
+ }
- resp = (struct ec_response_lightbar *)msg.indata;
+ resp = (struct ec_response_lightbar *)msg->data;
if (resp->get_seq.num >= ARRAY_SIZE(seqname))
- return scnprintf(buf, PAGE_SIZE, "%d\n", resp->get_seq.num);
+ ret = scnprintf(buf, PAGE_SIZE, "%d\n", resp->get_seq.num);
else
- return scnprintf(buf, PAGE_SIZE, "%s\n",
- seqname[resp->get_seq.num]);
+ ret = scnprintf(buf, PAGE_SIZE, "%s\n",
+ seqname[resp->get_seq.num]);
+
+exit:
+ kfree(msg);
+ return ret;
}
static ssize_t sequence_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct ec_params_lightbar *param;
- struct ec_response_lightbar *resp;
- struct cros_ec_command msg = INIT_MSG(param, resp);
+ struct cros_ec_command *msg;
unsigned int num;
int ret, len;
- struct cros_ec_device *ec = dev_get_drvdata(dev);
+ struct cros_ec_dev *ec = container_of(dev,
+ struct cros_ec_dev, class_dev);
+
+ msg = alloc_lightbar_cmd_msg(ec);
+ if (!msg)
+ return -ENOMEM;
for (len = 0; len < count; len++)
if (!isalnum(buf[len]))
@@ -311,18 +370,18 @@ static ssize_t sequence_store(struct device *dev, struct device_attribute *attr,
return ret;
}
- param = (struct ec_params_lightbar *)msg.outdata;
+ param = (struct ec_params_lightbar *)msg->data;
param->cmd = LIGHTBAR_CMD_SEQ;
param->seq.num = num;
ret = lb_throttle();
if (ret)
return ret;
- ret = cros_ec_cmd_xfer(ec, &msg);
+ ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
return ret;
- if (msg.result != EC_RES_SUCCESS)
+ if (msg->result != EC_RES_SUCCESS)
return -EINVAL;
return count;
@@ -343,25 +402,27 @@ static struct attribute *__lb_cmds_attrs[] = {
&dev_attr_sequence.attr,
NULL,
};
-static struct attribute_group lb_cmds_attr_group = {
- .name = "lightbar",
- .attrs = __lb_cmds_attrs,
-};
-void ec_dev_lightbar_init(struct cros_ec_device *ec)
+static umode_t cros_ec_lightbar_attrs_are_visible(struct kobject *kobj,
+ struct attribute *a, int n)
{
- int ret = 0;
+ 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)
+ return 0;
/* Only instantiate this stuff if the EC has a lightbar */
- if (!get_lightbar_version(ec, NULL, NULL))
- return;
-
- ret = sysfs_create_group(&ec->vdev->kobj, &lb_cmds_attr_group);
- if (ret)
- pr_warn("sysfs_create_group() failed: %d\n", ret);
+ if (get_lightbar_version(ec, NULL, NULL))
+ return a->mode;
+ else
+ return 0;
}
-void ec_dev_lightbar_remove(struct cros_ec_device *ec)
-{
- sysfs_remove_group(&ec->vdev->kobj, &lb_cmds_attr_group);
-}
+struct attribute_group cros_ec_lightbar_attr_group = {
+ .name = "lightbar",
+ .attrs = __lb_cmds_attrs,
+ .is_visible = cros_ec_lightbar_attrs_are_visible,
+};
diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c
index 8f9ac4d7b..bdd77ce45 100644
--- a/drivers/platform/chrome/cros_ec_lpc.c
+++ b/drivers/platform/chrome/cros_ec_lpc.c
@@ -46,6 +46,77 @@ static int ec_response_timed_out(void)
return 1;
}
+static int cros_ec_pkt_xfer_lpc(struct cros_ec_device *ec,
+ struct cros_ec_command *msg)
+{
+ struct ec_host_request *request;
+ struct ec_host_response response;
+ u8 sum = 0;
+ int i;
+ int ret = 0;
+ u8 *dout;
+
+ ret = cros_ec_prepare_tx(ec, msg);
+
+ /* Write buffer */
+ for (i = 0; i < ret; i++)
+ outb(ec->dout[i], EC_LPC_ADDR_HOST_PACKET + i);
+
+ request = (struct ec_host_request *)ec->dout;
+
+ /* Here we go */
+ outb(EC_COMMAND_PROTOCOL_3, EC_LPC_ADDR_HOST_CMD);
+
+ if (ec_response_timed_out()) {
+ dev_warn(ec->dev, "EC responsed timed out\n");
+ ret = -EIO;
+ goto done;
+ }
+
+ /* Check result */
+ msg->result = inb(EC_LPC_ADDR_HOST_DATA);
+ ret = cros_ec_check_result(ec, msg);
+ if (ret)
+ goto done;
+
+ /* Read back response */
+ dout = (u8 *)&response;
+ for (i = 0; i < sizeof(response); i++) {
+ dout[i] = inb(EC_LPC_ADDR_HOST_PACKET + i);
+ sum += dout[i];
+ }
+
+ msg->result = response.result;
+
+ if (response.data_len > msg->insize) {
+ dev_err(ec->dev,
+ "packet too long (%d bytes, expected %d)",
+ response.data_len, msg->insize);
+ ret = -EMSGSIZE;
+ goto done;
+ }
+
+ /* Read response and process checksum */
+ for (i = 0; i < response.data_len; i++) {
+ msg->data[i] =
+ inb(EC_LPC_ADDR_HOST_PACKET + sizeof(response) + i);
+ sum += msg->data[i];
+ }
+
+ if (sum) {
+ dev_err(ec->dev,
+ "bad packet checksum %02x\n",
+ response.checksum);
+ ret = -EBADMSG;
+ goto done;
+ }
+
+ /* Return actual amount of data received */
+ ret = response.data_len;
+done:
+ return ret;
+}
+
static int cros_ec_cmd_xfer_lpc(struct cros_ec_device *ec,
struct cros_ec_command *msg)
{
@@ -73,8 +144,8 @@ static int cros_ec_cmd_xfer_lpc(struct cros_ec_device *ec,
/* Copy data and update checksum */
for (i = 0; i < msg->outsize; i++) {
- outb(msg->outdata[i], EC_LPC_ADDR_HOST_PARAM + i);
- csum += msg->outdata[i];
+ outb(msg->data[i], EC_LPC_ADDR_HOST_PARAM + i);
+ csum += msg->data[i];
}
/* Finalize checksum and write args */
@@ -129,8 +200,8 @@ static int cros_ec_cmd_xfer_lpc(struct cros_ec_device *ec,
/* Read response and update checksum */
for (i = 0; i < args.data_size; i++) {
- msg->indata[i] = inb(EC_LPC_ADDR_HOST_PARAM + i);
- csum += msg->indata[i];
+ msg->data[i] = inb(EC_LPC_ADDR_HOST_PARAM + i);
+ csum += msg->data[i];
}
/* Verify checksum */
@@ -212,11 +283,13 @@ static int cros_ec_lpc_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, ec_dev);
ec_dev->dev = dev;
- ec_dev->ec_name = pdev->name;
ec_dev->phys_name = dev_name(dev);
- ec_dev->parent = dev;
ec_dev->cmd_xfer = cros_ec_cmd_xfer_lpc;
+ ec_dev->pkt_xfer = cros_ec_pkt_xfer_lpc;
ec_dev->cmd_readmem = cros_ec_lpc_readmem;
+ ec_dev->din_size = sizeof(struct ec_host_response) +
+ sizeof(struct ec_response_get_protocol_info);
+ ec_dev->dout_size = sizeof(struct ec_host_request);
ret = cros_ec_register(ec_dev);
if (ret) {
diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
new file mode 100644
index 000000000..990308ca3
--- /dev/null
+++ b/drivers/platform/chrome/cros_ec_proto.c
@@ -0,0 +1,382 @@
+/*
+ * ChromeOS EC communication protocol helper functions
+ *
+ * Copyright (C) 2015 Google, Inc
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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/mfd/cros_ec.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#define EC_COMMAND_RETRIES 50
+
+static int prepare_packet(struct cros_ec_device *ec_dev,
+ struct cros_ec_command *msg)
+{
+ struct ec_host_request *request;
+ u8 *out;
+ int i;
+ u8 csum = 0;
+
+ BUG_ON(ec_dev->proto_version != EC_HOST_REQUEST_VERSION);
+ BUG_ON(msg->outsize + sizeof(*request) > ec_dev->dout_size);
+
+ out = ec_dev->dout;
+ request = (struct ec_host_request *)out;
+ request->struct_version = EC_HOST_REQUEST_VERSION;
+ request->checksum = 0;
+ request->command = msg->command;
+ request->command_version = msg->version;
+ request->reserved = 0;
+ request->data_len = msg->outsize;
+
+ for (i = 0; i < sizeof(*request); i++)
+ csum += out[i];
+
+ /* Copy data and update checksum */
+ memcpy(out + sizeof(*request), msg->data, msg->outsize);
+ for (i = 0; i < msg->outsize; i++)
+ csum += msg->data[i];
+
+ request->checksum = -csum;
+
+ return sizeof(*request) + msg->outsize;
+}
+
+static int send_command(struct cros_ec_device *ec_dev,
+ struct cros_ec_command *msg)
+{
+ int ret;
+
+ if (ec_dev->proto_version > 2)
+ ret = ec_dev->pkt_xfer(ec_dev, msg);
+ else
+ ret = ec_dev->cmd_xfer(ec_dev, msg);
+
+ if (msg->result == EC_RES_IN_PROGRESS) {
+ int i;
+ struct cros_ec_command *status_msg;
+ struct ec_response_get_comms_status *status;
+
+ status_msg = kmalloc(sizeof(*status_msg) + sizeof(*status),
+ GFP_KERNEL);
+ if (!status_msg)
+ return -ENOMEM;
+
+ status_msg->version = 0;
+ status_msg->command = EC_CMD_GET_COMMS_STATUS;
+ status_msg->insize = sizeof(*status);
+ status_msg->outsize = 0;
+
+ /*
+ * Query the EC's status until it's no longer busy or
+ * we encounter an error.
+ */
+ for (i = 0; i < EC_COMMAND_RETRIES; i++) {
+ usleep_range(10000, 11000);
+
+ ret = ec_dev->cmd_xfer(ec_dev, status_msg);
+ if (ret < 0)
+ break;
+
+ msg->result = status_msg->result;
+ if (status_msg->result != EC_RES_SUCCESS)
+ break;
+
+ status = (struct ec_response_get_comms_status *)
+ status_msg->data;
+ if (!(status->flags & EC_COMMS_STATUS_PROCESSING))
+ break;
+ }
+
+ kfree(status_msg);
+ }
+
+ return ret;
+}
+
+int cros_ec_prepare_tx(struct cros_ec_device *ec_dev,
+ struct cros_ec_command *msg)
+{
+ u8 *out;
+ u8 csum;
+ int i;
+
+ if (ec_dev->proto_version > 2)
+ return prepare_packet(ec_dev, msg);
+
+ BUG_ON(msg->outsize > EC_PROTO2_MAX_PARAM_SIZE);
+ out = ec_dev->dout;
+ out[0] = EC_CMD_VERSION0 + msg->version;
+ out[1] = msg->command;
+ out[2] = msg->outsize;
+ csum = out[0] + out[1] + out[2];
+ for (i = 0; i < msg->outsize; i++)
+ csum += out[EC_MSG_TX_HEADER_BYTES + i] = msg->data[i];
+ out[EC_MSG_TX_HEADER_BYTES + msg->outsize] = csum;
+
+ return EC_MSG_TX_PROTO_BYTES + msg->outsize;
+}
+EXPORT_SYMBOL(cros_ec_prepare_tx);
+
+int cros_ec_check_result(struct cros_ec_device *ec_dev,
+ struct cros_ec_command *msg)
+{
+ switch (msg->result) {
+ case EC_RES_SUCCESS:
+ return 0;
+ case EC_RES_IN_PROGRESS:
+ dev_dbg(ec_dev->dev, "command 0x%02x in progress\n",
+ msg->command);
+ return -EAGAIN;
+ default:
+ dev_dbg(ec_dev->dev, "command 0x%02x returned %d\n",
+ msg->command, msg->result);
+ return 0;
+ }
+}
+EXPORT_SYMBOL(cros_ec_check_result);
+
+static int cros_ec_host_command_proto_query(struct cros_ec_device *ec_dev,
+ int devidx,
+ struct cros_ec_command *msg)
+{
+ /*
+ * Try using v3+ to query for supported protocols. If this
+ * command fails, fall back to v2. Returns the highest protocol
+ * supported by the EC.
+ * Also sets the max request/response/passthru size.
+ */
+ int ret;
+
+ if (!ec_dev->pkt_xfer)
+ return -EPROTONOSUPPORT;
+
+ memset(msg, 0, sizeof(*msg));
+ msg->command = EC_CMD_PASSTHRU_OFFSET(devidx) | EC_CMD_GET_PROTOCOL_INFO;
+ msg->insize = sizeof(struct ec_response_get_protocol_info);
+
+ ret = send_command(ec_dev, msg);
+
+ if (ret < 0) {
+ dev_dbg(ec_dev->dev,
+ "failed to check for EC[%d] protocol version: %d\n",
+ devidx, ret);
+ return ret;
+ }
+
+ if (devidx > 0 && msg->result == EC_RES_INVALID_COMMAND)
+ return -ENODEV;
+ else if (msg->result != EC_RES_SUCCESS)
+ return msg->result;
+
+ return 0;
+}
+
+static int cros_ec_host_command_proto_query_v2(struct cros_ec_device *ec_dev)
+{
+ struct cros_ec_command *msg;
+ struct ec_params_hello *hello_params;
+ struct ec_response_hello *hello_response;
+ int ret;
+ int len = max(sizeof(*hello_params), sizeof(*hello_response));
+
+ msg = kmalloc(sizeof(*msg) + len, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ msg->version = 0;
+ msg->command = EC_CMD_HELLO;
+ hello_params = (struct ec_params_hello *)msg->data;
+ msg->outsize = sizeof(*hello_params);
+ hello_response = (struct ec_response_hello *)msg->data;
+ msg->insize = sizeof(*hello_response);
+
+ hello_params->in_data = 0xa0b0c0d0;
+
+ ret = send_command(ec_dev, msg);
+
+ if (ret < 0) {
+ dev_dbg(ec_dev->dev,
+ "EC failed to respond to v2 hello: %d\n",
+ ret);
+ goto exit;
+ } else if (msg->result != EC_RES_SUCCESS) {
+ dev_err(ec_dev->dev,
+ "EC responded to v2 hello with error: %d\n",
+ msg->result);
+ ret = msg->result;
+ goto exit;
+ } else if (hello_response->out_data != 0xa1b2c3d4) {
+ dev_err(ec_dev->dev,
+ "EC responded to v2 hello with bad result: %u\n",
+ hello_response->out_data);
+ ret = -EBADMSG;
+ goto exit;
+ }
+
+ ret = 0;
+
+ exit:
+ kfree(msg);
+ return ret;
+}
+
+int cros_ec_query_all(struct cros_ec_device *ec_dev)
+{
+ struct device *dev = ec_dev->dev;
+ struct cros_ec_command *proto_msg;
+ struct ec_response_get_protocol_info *proto_info;
+ int ret;
+
+ proto_msg = kzalloc(sizeof(*proto_msg) + sizeof(*proto_info),
+ GFP_KERNEL);
+ if (!proto_msg)
+ return -ENOMEM;
+
+ /* First try sending with proto v3. */
+ ec_dev->proto_version = 3;
+ ret = cros_ec_host_command_proto_query(ec_dev, 0, proto_msg);
+
+ if (ret == 0) {
+ proto_info = (struct ec_response_get_protocol_info *)
+ proto_msg->data;
+ ec_dev->max_request = proto_info->max_request_packet_size -
+ sizeof(struct ec_host_request);
+ ec_dev->max_response = proto_info->max_response_packet_size -
+ sizeof(struct ec_host_response);
+ ec_dev->proto_version =
+ min(EC_HOST_REQUEST_VERSION,
+ fls(proto_info->protocol_versions) - 1);
+ dev_dbg(ec_dev->dev,
+ "using proto v%u\n",
+ ec_dev->proto_version);
+
+ ec_dev->din_size = ec_dev->max_response +
+ sizeof(struct ec_host_response) +
+ EC_MAX_RESPONSE_OVERHEAD;
+ ec_dev->dout_size = ec_dev->max_request +
+ sizeof(struct ec_host_request) +
+ EC_MAX_REQUEST_OVERHEAD;
+
+ /*
+ * Check for PD
+ */
+ ret = cros_ec_host_command_proto_query(ec_dev, 1, proto_msg);
+
+ if (ret) {
+ dev_dbg(ec_dev->dev, "no PD chip found: %d\n", ret);
+ ec_dev->max_passthru = 0;
+ } else {
+ dev_dbg(ec_dev->dev, "found PD chip\n");
+ ec_dev->max_passthru =
+ proto_info->max_request_packet_size -
+ sizeof(struct ec_host_request);
+ }
+ } else {
+ /* Try querying with a v2 hello message. */
+ ec_dev->proto_version = 2;
+ ret = cros_ec_host_command_proto_query_v2(ec_dev);
+
+ if (ret == 0) {
+ /* V2 hello succeeded. */
+ dev_dbg(ec_dev->dev, "falling back to proto v2\n");
+
+ ec_dev->max_request = EC_PROTO2_MAX_PARAM_SIZE;
+ 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;
+ } else {
+ /*
+ * It's possible for a test to occur too early when
+ * the EC isn't listening. If this happens, we'll
+ * test later when the first command is run.
+ */
+ ec_dev->proto_version = EC_PROTO_VERSION_UNKNOWN;
+ dev_dbg(ec_dev->dev, "EC query failed: %d\n", ret);
+ goto exit;
+ }
+ }
+
+ devm_kfree(dev, ec_dev->din);
+ devm_kfree(dev, ec_dev->dout);
+
+ ec_dev->din = devm_kzalloc(dev, ec_dev->din_size, GFP_KERNEL);
+ if (!ec_dev->din) {
+ ret = -ENOMEM;
+ goto exit;
+ }
+
+ ec_dev->dout = devm_kzalloc(dev, ec_dev->dout_size, GFP_KERNEL);
+ if (!ec_dev->dout) {
+ devm_kfree(dev, ec_dev->din);
+ ret = -ENOMEM;
+ goto exit;
+ }
+
+exit:
+ kfree(proto_msg);
+ return ret;
+}
+EXPORT_SYMBOL(cros_ec_query_all);
+
+int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev,
+ struct cros_ec_command *msg)
+{
+ int ret;
+
+ mutex_lock(&ec_dev->lock);
+ if (ec_dev->proto_version == EC_PROTO_VERSION_UNKNOWN) {
+ ret = cros_ec_query_all(ec_dev);
+ if (ret) {
+ dev_err(ec_dev->dev,
+ "EC version unknown and query failed; aborting command\n");
+ mutex_unlock(&ec_dev->lock);
+ return ret;
+ }
+ }
+
+ if (msg->insize > ec_dev->max_response) {
+ dev_dbg(ec_dev->dev, "clamping message receive buffer\n");
+ msg->insize = ec_dev->max_response;
+ }
+
+ if (msg->command < EC_CMD_PASSTHRU_OFFSET(1)) {
+ if (msg->outsize > ec_dev->max_request) {
+ dev_err(ec_dev->dev,
+ "request of size %u is too big (max: %u)\n",
+ msg->outsize,
+ ec_dev->max_request);
+ mutex_unlock(&ec_dev->lock);
+ return -EMSGSIZE;
+ }
+ } else {
+ if (msg->outsize > ec_dev->max_passthru) {
+ dev_err(ec_dev->dev,
+ "passthru rq of size %u is too big (max: %u)\n",
+ msg->outsize,
+ ec_dev->max_passthru);
+ mutex_unlock(&ec_dev->lock);
+ return -EMSGSIZE;
+ }
+ }
+ ret = send_command(ec_dev, msg);
+ mutex_unlock(&ec_dev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL(cros_ec_cmd_xfer);
diff --git a/drivers/platform/chrome/cros_ec_sysfs.c b/drivers/platform/chrome/cros_ec_sysfs.c
index fb62ab6cc..f3baf9973 100644
--- a/drivers/platform/chrome/cros_ec_sysfs.c
+++ b/drivers/platform/chrome/cros_ec_sysfs.c
@@ -29,6 +29,7 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/printk.h>
+#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/types.h>
#include <linux/uaccess.h>
@@ -66,13 +67,19 @@ static ssize_t store_ec_reboot(struct device *dev,
{"hibernate", EC_REBOOT_HIBERNATE, 0},
{"at-shutdown", -1, EC_REBOOT_FLAG_ON_AP_SHUTDOWN},
};
- struct cros_ec_command msg = { 0 };
- struct ec_params_reboot_ec *param =
- (struct ec_params_reboot_ec *)msg.outdata;
+ struct cros_ec_command *msg;
+ struct ec_params_reboot_ec *param;
int got_cmd = 0, offset = 0;
int i;
int ret;
- struct cros_ec_device *ec = dev_get_drvdata(dev);
+ struct cros_ec_dev *ec = container_of(dev,
+ struct cros_ec_dev, class_dev);
+
+ msg = kmalloc(sizeof(*msg) + sizeof(*param), GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ param = (struct ec_params_reboot_ec *)msg->data;
param->flags = 0;
while (1) {
@@ -100,19 +107,26 @@ static ssize_t store_ec_reboot(struct device *dev,
offset++;
}
- if (!got_cmd)
- return -EINVAL;
-
- msg.command = EC_CMD_REBOOT_EC;
- msg.outsize = sizeof(param);
- ret = cros_ec_cmd_xfer(ec, &msg);
- if (ret < 0)
- return ret;
- if (msg.result != EC_RES_SUCCESS) {
- dev_dbg(ec->dev, "EC result %d\n", msg.result);
- return -EINVAL;
+ if (!got_cmd) {
+ count = -EINVAL;
+ goto exit;
}
+ msg->version = 0;
+ msg->command = EC_CMD_REBOOT_EC + ec->cmd_offset;
+ msg->outsize = sizeof(*param);
+ msg->insize = 0;
+ ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
+ if (ret < 0) {
+ count = ret;
+ goto exit;
+ }
+ if (msg->result != EC_RES_SUCCESS) {
+ dev_dbg(ec->dev, "EC result %d\n", msg->result);
+ count = -EINVAL;
+ }
+exit:
+ kfree(msg);
return count;
}
@@ -123,22 +137,33 @@ static ssize_t show_ec_version(struct device *dev,
struct ec_response_get_version *r_ver;
struct ec_response_get_chip_info *r_chip;
struct ec_response_board_version *r_board;
- struct cros_ec_command msg = { 0 };
+ struct cros_ec_command *msg;
int ret;
int count = 0;
- struct cros_ec_device *ec = dev_get_drvdata(dev);
+ struct cros_ec_dev *ec = container_of(dev,
+ struct cros_ec_dev, class_dev);
+
+ msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
/* Get versions. RW may change. */
- msg.command = EC_CMD_GET_VERSION;
- msg.insize = sizeof(*r_ver);
- ret = cros_ec_cmd_xfer(ec, &msg);
- if (ret < 0)
- return ret;
- if (msg.result != EC_RES_SUCCESS)
- return scnprintf(buf, PAGE_SIZE,
- "ERROR: EC returned %d\n", msg.result);
+ msg->version = 0;
+ msg->command = EC_CMD_GET_VERSION + ec->cmd_offset;
+ msg->insize = sizeof(*r_ver);
+ msg->outsize = 0;
+ ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
+ if (ret < 0) {
+ count = ret;
+ goto exit;
+ }
+ if (msg->result != EC_RES_SUCCESS) {
+ count = scnprintf(buf, PAGE_SIZE,
+ "ERROR: EC returned %d\n", msg->result);
+ goto exit;
+ }
- r_ver = (struct ec_response_get_version *)msg.indata;
+ r_ver = (struct ec_response_get_version *)msg->data;
/* Strings should be null-terminated, but let's be sure. */
r_ver->version_string_ro[sizeof(r_ver->version_string_ro) - 1] = '\0';
r_ver->version_string_rw[sizeof(r_ver->version_string_rw) - 1] = '\0';
@@ -152,33 +177,33 @@ static ssize_t show_ec_version(struct device *dev,
image_names[r_ver->current_image] : "?"));
/* Get build info. */
- msg.command = EC_CMD_GET_BUILD_INFO;
- msg.insize = sizeof(msg.indata);
- ret = cros_ec_cmd_xfer(ec, &msg);
+ msg->command = EC_CMD_GET_BUILD_INFO + ec->cmd_offset;
+ msg->insize = EC_HOST_PARAM_SIZE;
+ ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Build info: XFER ERROR %d\n", ret);
- else if (msg.result != EC_RES_SUCCESS)
+ else if (msg->result != EC_RES_SUCCESS)
count += scnprintf(buf + count, PAGE_SIZE - count,
- "Build info: EC error %d\n", msg.result);
+ "Build info: EC error %d\n", msg->result);
else {
- msg.indata[sizeof(msg.indata) - 1] = '\0';
+ msg->data[sizeof(msg->data) - 1] = '\0';
count += scnprintf(buf + count, PAGE_SIZE - count,
- "Build info: %s\n", msg.indata);
+ "Build info: %s\n", msg->data);
}
/* Get chip info. */
- msg.command = EC_CMD_GET_CHIP_INFO;
- msg.insize = sizeof(*r_chip);
- ret = cros_ec_cmd_xfer(ec, &msg);
+ msg->command = EC_CMD_GET_CHIP_INFO + ec->cmd_offset;
+ msg->insize = sizeof(*r_chip);
+ ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip info: XFER ERROR %d\n", ret);
- else if (msg.result != EC_RES_SUCCESS)
+ else if (msg->result != EC_RES_SUCCESS)
count += scnprintf(buf + count, PAGE_SIZE - count,
- "Chip info: EC error %d\n", msg.result);
+ "Chip info: EC error %d\n", msg->result);
else {
- r_chip = (struct ec_response_get_chip_info *)msg.indata;
+ r_chip = (struct ec_response_get_chip_info *)msg->data;
r_chip->vendor[sizeof(r_chip->vendor) - 1] = '\0';
r_chip->name[sizeof(r_chip->name) - 1] = '\0';
@@ -192,23 +217,25 @@ static ssize_t show_ec_version(struct device *dev,
}
/* Get board version */
- msg.command = EC_CMD_GET_BOARD_VERSION;
- msg.insize = sizeof(*r_board);
- ret = cros_ec_cmd_xfer(ec, &msg);
+ msg->command = EC_CMD_GET_BOARD_VERSION + ec->cmd_offset;
+ msg->insize = sizeof(*r_board);
+ ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Board version: XFER ERROR %d\n", ret);
- else if (msg.result != EC_RES_SUCCESS)
+ else if (msg->result != EC_RES_SUCCESS)
count += scnprintf(buf + count, PAGE_SIZE - count,
- "Board version: EC error %d\n", msg.result);
+ "Board version: EC error %d\n", msg->result);
else {
- r_board = (struct ec_response_board_version *)msg.indata;
+ r_board = (struct ec_response_board_version *)msg->data;
count += scnprintf(buf + count, PAGE_SIZE - count,
"Board version: %d\n",
r_board->board_version);
}
+exit:
+ kfree(msg);
return count;
}
@@ -216,27 +243,39 @@ static ssize_t show_ec_flashinfo(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ec_response_flash_info *resp;
- struct cros_ec_command msg = { 0 };
+ struct cros_ec_command *msg;
int ret;
- struct cros_ec_device *ec = dev_get_drvdata(dev);
+ struct cros_ec_dev *ec = container_of(dev,
+ struct cros_ec_dev, class_dev);
+
+ msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
/* The flash info shouldn't ever change, but ask each time anyway. */
- msg.command = EC_CMD_FLASH_INFO;
- msg.insize = sizeof(*resp);
- ret = cros_ec_cmd_xfer(ec, &msg);
+ msg->version = 0;
+ msg->command = EC_CMD_FLASH_INFO + ec->cmd_offset;
+ msg->insize = sizeof(*resp);
+ msg->outsize = 0;
+ ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
- return ret;
- if (msg.result != EC_RES_SUCCESS)
- return scnprintf(buf, PAGE_SIZE,
- "ERROR: EC returned %d\n", msg.result);
-
- resp = (struct ec_response_flash_info *)msg.indata;
-
- return scnprintf(buf, PAGE_SIZE,
- "FlashSize %d\nWriteSize %d\n"
- "EraseSize %d\nProtectSize %d\n",
- resp->flash_size, resp->write_block_size,
- resp->erase_block_size, resp->protect_block_size);
+ goto exit;
+ if (msg->result != EC_RES_SUCCESS) {
+ ret = scnprintf(buf, PAGE_SIZE,
+ "ERROR: EC returned %d\n", msg->result);
+ goto exit;
+ }
+
+ resp = (struct ec_response_flash_info *)msg->data;
+
+ ret = scnprintf(buf, PAGE_SIZE,
+ "FlashSize %d\nWriteSize %d\n"
+ "EraseSize %d\nProtectSize %d\n",
+ resp->flash_size, resp->write_block_size,
+ resp->erase_block_size, resp->protect_block_size);
+exit:
+ kfree(msg);
+ return ret;
}
/* Module initialization */
@@ -252,20 +291,7 @@ static struct attribute *__ec_attrs[] = {
NULL,
};
-static struct attribute_group ec_attr_group = {
+struct attribute_group cros_ec_attr_group = {
.attrs = __ec_attrs,
};
-void ec_dev_sysfs_init(struct cros_ec_device *ec)
-{
- int error;
-
- error = sysfs_create_group(&ec->vdev->kobj, &ec_attr_group);
- if (error)
- pr_warn("failed to create group: %d\n", error);
-}
-
-void ec_dev_sysfs_remove(struct cros_ec_device *ec)
-{
- sysfs_remove_group(&ec->vdev->kobj, &ec_attr_group);
-}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-19 22:02:28 +0000