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authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-13 21:53:18 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-13 21:53:18 -0800
commit63f4f7e8df6c504f39c6493799b54775916030d6 (patch)
treeb8dc15df1ae7710bbbb51bd1ef8f1c7011f17fcd /drivers
parent4bfc89d26a0d177a79574fc1b54fc728e3bb8b4e (diff)
parentebaf31c46cce0dc8a6ed690b5456b295aa7586a6 (diff)
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Merge tag 'chrome-platform-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/olof/chrome-platform
Pull chrome platform updates from Olof Johansson: "Here's the branch of chrome platform changes for v4.4. Some have been queued up for the full 4.3 release cycle since I forgot to send them in for that round (rebased early on to deal with fixes conflicts). Most of these enable EC communication stuff -- Pixel 2015 support, enabling building for ARM64 platforms, and a few fixes for memory leaks. There's also a patch in here to allow reading/writing the verified boot context, which depends on a sysfs patch acked by Greg" * tag 'chrome-platform-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/olof/chrome-platform: platform/chrome: Fix i2c-designware adapter name platform/chrome: Support reading/writing the vboot context sysfs: Support is_visible() on binary attributes platform/chrome: cros_ec: Fix possible leak in led_rgb_store() platform/chrome: cros_ec: Fix leak in sequence_store() platform/chrome: Enable Chrome platforms on 64-bit ARM platform/chrome: cros_ec_dev - Add a platform device ID table platform/chrome: cros_ec_lpc - Add support for Google Pixel 2 platform/chrome: cros_ec_lpc - Use existing function to check EC result platform/chrome: Make depends on MFD_CROS_EC instead CROS_EC_PROTO Revert "platform/chrome: Don't make CHROME_PLATFORMS depends on X86 || ARM"
Diffstat (limited to 'drivers')
-rw-r--r--drivers/platform/chrome/Kconfig5
-rw-r--r--drivers/platform/chrome/Makefile3
-rw-r--r--drivers/platform/chrome/chromeos_laptop.c4
-rw-r--r--drivers/platform/chrome/cros_ec_dev.c7
-rw-r--r--drivers/platform/chrome/cros_ec_lightbar.c31
-rw-r--r--drivers/platform/chrome/cros_ec_lpc.c21
-rw-r--r--drivers/platform/chrome/cros_ec_vbc.c137
7 files changed, 177 insertions, 31 deletions
diff --git a/drivers/platform/chrome/Kconfig b/drivers/platform/chrome/Kconfig
index 3271cd1abe7c..d03df4a60d05 100644
--- a/drivers/platform/chrome/Kconfig
+++ b/drivers/platform/chrome/Kconfig
@@ -4,6 +4,7 @@
menuconfig CHROME_PLATFORMS
bool "Platform support for Chrome hardware"
+ depends on X86 || ARM || ARM64 || COMPILE_TEST
---help---
Say Y here to get to see options for platform support for
various Chromebooks and Chromeboxes. This option alone does
@@ -39,7 +40,7 @@ config CHROMEOS_PSTORE
config CROS_EC_CHARDEV
tristate "Chrome OS Embedded Controller userspace device interface"
- depends on CROS_EC_PROTO
+ depends on MFD_CROS_EC
---help---
This driver adds support to talk with the ChromeOS EC from userspace.
@@ -48,7 +49,7 @@ config CROS_EC_CHARDEV
config CROS_EC_LPC
tristate "ChromeOS Embedded Controller (LPC)"
- depends on MFD_CROS_EC && CROS_EC_PROTO && (X86 || COMPILE_TEST)
+ depends on MFD_CROS_EC && (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
diff --git a/drivers/platform/chrome/Makefile b/drivers/platform/chrome/Makefile
index 4a11b010f5d8..bc498bda8211 100644
--- a/drivers/platform/chrome/Makefile
+++ b/drivers/platform/chrome/Makefile
@@ -1,7 +1,8 @@
obj-$(CONFIG_CHROMEOS_LAPTOP) += chromeos_laptop.o
obj-$(CONFIG_CHROMEOS_PSTORE) += chromeos_pstore.o
-cros_ec_devs-objs := cros_ec_dev.o cros_ec_sysfs.o cros_ec_lightbar.o
+cros_ec_devs-objs := cros_ec_dev.o cros_ec_sysfs.o \
+ cros_ec_lightbar.o cros_ec_vbc.o
obj-$(CONFIG_CROS_EC_CHARDEV) += cros_ec_devs.o
obj-$(CONFIG_CROS_EC_LPC) += cros_ec_lpc.o
obj-$(CONFIG_CROS_EC_PROTO) += cros_ec_proto.o
diff --git a/drivers/platform/chrome/chromeos_laptop.c b/drivers/platform/chrome/chromeos_laptop.c
index 02072749fff3..2b441e9ae593 100644
--- a/drivers/platform/chrome/chromeos_laptop.c
+++ b/drivers/platform/chrome/chromeos_laptop.c
@@ -47,8 +47,8 @@ static const char *i2c_adapter_names[] = {
"SMBus I801 adapter",
"i915 gmbus vga",
"i915 gmbus panel",
- "i2c-designware-pci",
- "i2c-designware-pci",
+ "Synopsys DesignWare I2C adapter",
+ "Synopsys DesignWare I2C adapter",
};
/* Keep this enum consistent with i2c_adapter_names */
diff --git a/drivers/platform/chrome/cros_ec_dev.c b/drivers/platform/chrome/cros_ec_dev.c
index e8fcdc237029..d45cd254ed1c 100644
--- a/drivers/platform/chrome/cros_ec_dev.c
+++ b/drivers/platform/chrome/cros_ec_dev.c
@@ -32,6 +32,7 @@ static int ec_major;
static const struct attribute_group *cros_ec_groups[] = {
&cros_ec_attr_group,
&cros_ec_lightbar_attr_group,
+ &cros_ec_vbc_attr_group,
NULL,
};
@@ -287,6 +288,12 @@ static int ec_device_remove(struct platform_device *pdev)
return 0;
}
+static const struct platform_device_id cros_ec_id[] = {
+ { "cros-ec-ctl", 0 },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(platform, cros_ec_id);
+
static struct platform_driver cros_ec_dev_driver = {
.driver = {
.name = "cros-ec-ctl",
diff --git a/drivers/platform/chrome/cros_ec_lightbar.c b/drivers/platform/chrome/cros_ec_lightbar.c
index 144e09df9b84..ff7640575c75 100644
--- a/drivers/platform/chrome/cros_ec_lightbar.c
+++ b/drivers/platform/chrome/cros_ec_lightbar.c
@@ -252,7 +252,7 @@ static ssize_t led_rgb_store(struct device *dev, struct device_attribute *attr,
ret = sscanf(buf, "%i", &val[i++]);
if (ret == 0)
- return -EINVAL;
+ goto exit;
if (i == 4) {
param = (struct ec_params_lightbar *)msg->data;
@@ -268,17 +268,15 @@ static ssize_t led_rgb_store(struct device *dev, struct device_attribute *attr,
if ((j++ % 4) == 0) {
ret = lb_throttle();
if (ret)
- return ret;
+ goto exit;
}
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
goto exit;
- if (msg->result != EC_RES_SUCCESS) {
- ret = -EINVAL;
+ if (msg->result != EC_RES_SUCCESS)
goto exit;
- }
i = 0;
ok = 1;
@@ -352,10 +350,6 @@ static ssize_t sequence_store(struct device *dev, struct device_attribute *attr,
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]))
break;
@@ -370,21 +364,30 @@ static ssize_t sequence_store(struct device *dev, struct device_attribute *attr,
return ret;
}
+ msg = alloc_lightbar_cmd_msg(ec);
+ if (!msg)
+ return -ENOMEM;
+
param = (struct ec_params_lightbar *)msg->data;
param->cmd = LIGHTBAR_CMD_SEQ;
param->seq.num = num;
ret = lb_throttle();
if (ret)
- return ret;
+ goto exit;
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;
}
/* Module initialization */
diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c
index bdd77ce45f05..f9a245465fd0 100644
--- a/drivers/platform/chrome/cros_ec_lpc.c
+++ b/drivers/platform/chrome/cros_ec_lpc.c
@@ -166,19 +166,9 @@ static int cros_ec_cmd_xfer_lpc(struct cros_ec_device *ec,
/* Check result */
msg->result = inb(EC_LPC_ADDR_HOST_DATA);
-
- switch (msg->result) {
- case EC_RES_SUCCESS:
- break;
- case EC_RES_IN_PROGRESS:
- ret = -EAGAIN;
- dev_dbg(ec->dev, "command 0x%02x in progress\n",
- msg->command);
+ ret = cros_ec_check_result(ec, msg);
+ if (ret)
goto done;
- default:
- dev_dbg(ec->dev, "command 0x%02x returned %d\n",
- msg->command, msg->result);
- }
/* Read back args */
args.flags = inb(EC_LPC_ADDR_HOST_ARGS);
@@ -330,6 +320,13 @@ static struct dmi_system_id cros_ec_lpc_dmi_table[] __initdata = {
},
},
{
+ /* x86-samus, the Chromebook Pixel 2. */
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Samus"),
+ },
+ },
+ {
/* x86-peppy, the Acer C720 Chromebook. */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
diff --git a/drivers/platform/chrome/cros_ec_vbc.c b/drivers/platform/chrome/cros_ec_vbc.c
new file mode 100644
index 000000000000..564a0d08c8bf
--- /dev/null
+++ b/drivers/platform/chrome/cros_ec_vbc.c
@@ -0,0 +1,137 @@
+/*
+ * cros_ec_vbc - Expose the vboot context nvram to userspace
+ *
+ * Copyright (C) 2015 Collabora Ltd.
+ *
+ * based on vendor driver,
+ *
+ * Copyright (C) 2012 The Chromium OS Authors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/cros_ec.h>
+#include <linux/mfd/cros_ec_commands.h>
+#include <linux/slab.h>
+
+static ssize_t vboot_context_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *att, char *buf,
+ loff_t pos, size_t count)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct cros_ec_dev *ec = container_of(dev, struct cros_ec_dev,
+ class_dev);
+ struct cros_ec_device *ecdev = ec->ec_dev;
+ struct ec_params_vbnvcontext *params;
+ struct cros_ec_command *msg;
+ int err;
+ const size_t para_sz = sizeof(params->op);
+ const size_t resp_sz = sizeof(struct ec_response_vbnvcontext);
+ const size_t payload = max(para_sz, resp_sz);
+
+ msg = kmalloc(sizeof(*msg) + payload, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ /* NB: we only kmalloc()ated enough space for the op field */
+ params = (struct ec_params_vbnvcontext *)msg->data;
+ params->op = EC_VBNV_CONTEXT_OP_READ;
+
+ msg->version = EC_VER_VBNV_CONTEXT;
+ msg->command = EC_CMD_VBNV_CONTEXT;
+ msg->outsize = para_sz;
+ msg->insize = resp_sz;
+
+ err = cros_ec_cmd_xfer(ecdev, msg);
+ if (err < 0) {
+ dev_err(dev, "Error sending read request: %d\n", err);
+ kfree(msg);
+ return err;
+ }
+
+ memcpy(buf, msg->data, resp_sz);
+
+ kfree(msg);
+ return resp_sz;
+}
+
+static ssize_t vboot_context_write(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t pos, size_t count)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct cros_ec_dev *ec = container_of(dev, struct cros_ec_dev,
+ class_dev);
+ struct cros_ec_device *ecdev = ec->ec_dev;
+ struct ec_params_vbnvcontext *params;
+ struct cros_ec_command *msg;
+ int err;
+ const size_t para_sz = sizeof(*params);
+ const size_t data_sz = sizeof(params->block);
+
+ /* Only write full values */
+ if (count != data_sz)
+ return -EINVAL;
+
+ msg = kmalloc(sizeof(*msg) + para_sz, GFP_KERNEL);
+ if (!msg)
+ return -ENOMEM;
+
+ params = (struct ec_params_vbnvcontext *)msg->data;
+ params->op = EC_VBNV_CONTEXT_OP_WRITE;
+ memcpy(params->block, buf, data_sz);
+
+ msg->version = EC_VER_VBNV_CONTEXT;
+ msg->command = EC_CMD_VBNV_CONTEXT;
+ msg->outsize = para_sz;
+ msg->insize = 0;
+
+ err = cros_ec_cmd_xfer(ecdev, msg);
+ if (err < 0) {
+ dev_err(dev, "Error sending write request: %d\n", err);
+ kfree(msg);
+ return err;
+ }
+
+ kfree(msg);
+ return data_sz;
+}
+
+static umode_t cros_ec_vbc_is_visible(struct kobject *kobj,
+ struct bin_attribute *a, int n)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct cros_ec_dev *ec = container_of(dev, struct cros_ec_dev,
+ class_dev);
+ struct device_node *np = ec->ec_dev->dev->of_node;
+
+ if (IS_ENABLED(CONFIG_OF) && np) {
+ if (of_property_read_bool(np, "google,has-vbc-nvram"))
+ return a->attr.mode;
+ }
+
+ return 0;
+}
+
+static BIN_ATTR_RW(vboot_context, 16);
+
+static struct bin_attribute *cros_ec_vbc_bin_attrs[] = {
+ &bin_attr_vboot_context,
+ NULL
+};
+
+struct attribute_group cros_ec_vbc_attr_group = {
+ .name = "vbc",
+ .bin_attrs = cros_ec_vbc_bin_attrs,
+ .is_bin_visible = cros_ec_vbc_is_visible,
+};