The SoC info driver provides information such as Chip ID,
Chip family, serial number and other such details about
Qualcomm SoCs.
Signed-off-by: Imran Khan <kim...@codeaurora.org>
---
v3 --> v4:
- Corrected makefile so that smem and socinfo are treated as one module
- Moved the code snippet to get socinfo smem item into socinfo.c
- Removed redundant use of socinfo major version as it is always zero
- Removed unused enums
- Removed redundant indirections
- Use image_version object to store information about each entry in the
smem image table
- Replaced usage of snprintf with sprintf and scnprintf
- Get the address of image version table at the beginning and setup
image version attributes only if image version table is available
- Do the same for platform_subtype
- Make different type of image version objects read only or readable/
writable depending on their types. For example apps image attributes
can be modified via sysfs but the same can't be done for modem image
- Show PMIC model in a human readable form rather than a numeric number
- Avoid using table in single sysfs entry
- Removed checkpatch warnings about S_IRUGO
v2 --> v3:
- Add support to toss soc information data into entropy pool
- Since socinfo is rolled into smem driver, compile the
relevant portion of socinfo driver with smem driver
v1 --> v2:
- Removed inclusion of system_misc.h
- merged socinfo.h into socinfo.c
- made platform type and subtype arrays static
- replaced uint32_t with u32
- made functions static to avoid exposing vendor specific interface
- Replaced usage of IS_ERR_OR_NULL with IS_ERR.
- Remove raw-id attribute usage as human readable soc-id will suffice here
- Avoid using a separate platform driver for socinfo by rolling it into smem
driver itself.
The sysfs setup is being done in a separate file (socinfo.c)
- Replaced macro BUILD_ID_LENGTH with SMEM_SOCINFO_BUILD_ID_LENGTH.
- For failure cases where socinfo can not be read use a single dummy socinfo
with error values.
- Removed usage of early_machine_is_xxx.
drivers/soc/qcom/Kconfig | 1 +
drivers/soc/qcom/Makefile | 3 +-
drivers/soc/qcom/smem.c | 5 +
drivers/soc/qcom/socinfo.c | 1112 ++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 1120 insertions(+), 1 deletion(-)
create mode 100644 drivers/soc/qcom/socinfo.c
diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
index 461b387..f89d34d 100644
--- a/drivers/soc/qcom/Kconfig
+++ b/drivers/soc/qcom/Kconfig
@@ -24,6 +24,7 @@ config QCOM_SMEM
tristate "Qualcomm Shared Memory Manager (SMEM)"
depends on ARCH_QCOM
depends on HWSPINLOCK
+ select SOC_BUS
help
Say y here to enable support for the Qualcomm Shared Memory Manager.
The driver provides an interface to items in a heap shared among all
diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile
index fdd664e..438efec 100644
--- a/drivers/soc/qcom/Makefile
+++ b/drivers/soc/qcom/Makefile
@@ -2,7 +2,8 @@ obj-$(CONFIG_QCOM_GSBI) += qcom_gsbi.o
obj-$(CONFIG_QCOM_PM) += spm.o
obj-$(CONFIG_QCOM_SMD) += smd.o
obj-$(CONFIG_QCOM_SMD_RPM) += smd-rpm.o
-obj-$(CONFIG_QCOM_SMEM) += smem.o
+obj-$(CONFIG_QCOM_SMEM) += qcom_smem.o
+qcom_smem-y := smem.o socinfo.o
obj-$(CONFIG_QCOM_SMEM_STATE) += smem_state.o
obj-$(CONFIG_QCOM_SMP2P) += smp2p.o
obj-$(CONFIG_QCOM_SMSM) += smsm.o
diff --git a/drivers/soc/qcom/smem.c b/drivers/soc/qcom/smem.c
index 18ec52f..a57acfb0 100644
--- a/drivers/soc/qcom/smem.c
+++ b/drivers/soc/qcom/smem.c
@@ -85,6 +85,9 @@
/* Max number of processors/hosts in a system */
#define SMEM_HOST_COUNT 9
+
+extern int qcom_socinfo_init(struct platform_device *pdev);
+
/**
* struct smem_proc_comm - proc_comm communication struct (legacy)
* @command: current command to be executed
@@ -751,6 +754,8 @@ static int qcom_smem_probe(struct platform_device *pdev)
__smem = smem;
+ qcom_socinfo_init(pdev);
+
return 0;
}
diff --git a/drivers/soc/qcom/socinfo.c b/drivers/soc/qcom/socinfo.c
new file mode 100644
index 0000000..314dbdb
--- /dev/null
+++ b/drivers/soc/qcom/socinfo.c
@@ -0,0 +1,1112 @@
+/*
+ * Copyright (c) 2009-2016, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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/export.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/sys_soc.h>
+#include <linux/slab.h>
+#include <linux/stat.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/random.h>
+#include <linux/soc/qcom/smem.h>
+
+#define PMIC_MODEL_UNKNOWN 0
+#define HW_PLATFORM_QRD 11
+#define PLATFORM_SUBTYPE_QRD_INVALID 6
+#define PLATFORM_SUBTYPE_INVALID 4
+/*
+ * SOC version type with major number in the upper 16 bits and minor
+ * number in the lower 16 bits. For example:
+ * 1.0 -> 0x00010000
+ * 2.3 -> 0x00020003
+ */
+#define SOC_VERSION_MAJOR(ver) (((ver) & 0xffff0000) >> 16)
+#define SOC_VERSION_MINOR(ver) ((ver) & 0x0000ffff)
+#define SOCINFO_FORMAT(x) (x)
+#define SOCINFO_VERSION_MAJOR SOC_VERSION_MAJOR
+#define SOCINFO_VERSION_MINOR SOC_VERSION_MINOR
+
+#define SMEM_SOCINFO_BUILD_ID_LENGTH 32
+#define SMEM_IMAGE_VERSION_BLOCKS_COUNT 32
+#define SMEM_IMAGE_VERSION_SIZE 4096
+#define SMEM_IMAGE_VERSION_NAME_SIZE 75
+#define SMEM_IMAGE_VERSION_VARIANT_SIZE 20
+#define SMEM_IMAGE_VERSION_OEM_SIZE 32
+#define SMEM_IMAGE_VERSION_PARTITION_APPS 10
+
+/*
+ * Shared memory identifiers, used to acquire handles to respective memory
+ * region.
+ */
+#define SMEM_IMAGE_VERSION_TABLE 469
+
+/*
+ * Shared memory identifiers, used to acquire handles to respective memory
+ * region.
+ */
+#define SMEM_HW_SW_BUILD_ID 137
+
+/*
+ * SMEM Image table indices
+ */
+enum smem_image_table_index {
+ SMEM_IMAGE_TABLE_BOOT_INDEX = 0,
+ SMEM_IMAGE_TABLE_TZ_INDEX,
+ SMEM_IMAGE_TABLE_RPM_INDEX = 3,
+ SMEM_IMAGE_TABLE_APPS_INDEX = 10,
+ SMEM_IMAGE_TABLE_MPSS_INDEX,
+ SMEM_IMAGE_TABLE_ADSP_INDEX,
+ SMEM_IMAGE_TABLE_CNSS_INDEX,
+ SMEM_IMAGE_TABLE_VIDEO_INDEX
+};
+
+#define SMEM_IMAGE_TABLE_ATTR(type, index) \
+static ssize_t \
+qcom_get_##type##_image_version(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return qcom_get_image_version(index, buf); \
+} \
+static ssize_t \
+qcom_set_##type##_image_version(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, \
+ size_t count) \
+{ \
+ return qcom_set_image_version(index, buf); \
+} \
+static ssize_t \
+qcom_get_##type##_image_variant(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return qcom_get_image_variant(index, buf); \
+} \
+static ssize_t \
+qcom_set_##type##_image_variant(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, \
+ size_t count) \
+{ \
+ return qcom_set_image_variant(index, buf); \
+} \
+static ssize_t \
+qcom_get_##type##_image_crm_version(struct device *dev,
\
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return qcom_get_image_crm_version(index, buf); \
+} \
+static ssize_t \
+qcom_set_##type##_image_crm_version(struct device *dev,
\
+ struct device_attribute *attr, \
+ const char *buf, \
+ size_t count) \
+{ \
+ return qcom_set_image_crm_version(index, buf); \
+} \
+DEVICE_ATTR(type##_image_version, 0644, qcom_get_##type##_image_version,\
+ qcom_set_##type##_image_version); \
+DEVICE_ATTR(type##_image_variant, 0644, qcom_get_##type##_image_variant,\
+ qcom_set_##type##_image_variant); \
+DEVICE_ATTR(type##_image_crm_version, 0644, \
+ qcom_get_##type##_image_crm_version, \
+ qcom_set_##type##_image_crm_version); \
+static struct attribute *type##_image_attrs[] = { \
+ &dev_attr_##type##_image_version.attr, \
+ &dev_attr_##type##_image_variant.attr, \
+ &dev_attr_##type##_image_crm_version.attr, \
+ NULL, \
+}; \
+static struct attribute_group type##_image_attr_group = { \
+ .attrs = type##_image_attrs, \
+}
+
+#define SMEM_IMAGE_TABLE_RO_ATTR(type, index) \
+static ssize_t \
+qcom_get_##type##_image_version(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return qcom_get_image_version(index, buf); \
+} \
+static ssize_t \
+qcom_get_##type##_image_variant(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return qcom_get_image_variant(index, buf); \
+} \
+static ssize_t \
+qcom_get_##type##_image_crm_version(struct device *dev,
\
+ struct device_attribute *attr, \
+ char *buf) \
+{ \
+ return qcom_get_image_crm_version(index, buf); \
+} \
+DEVICE_ATTR(type##_image_version, 0444, qcom_get_##type##_image_version,\
+ NULL); \
+DEVICE_ATTR(type##_image_variant, 0444, qcom_get_##type##_image_variant,\
+ NULL); \
+DEVICE_ATTR(type##_image_crm_version, 0444, \
+ qcom_get_##type##_image_crm_version, \
+ NULL); \
+static struct attribute *type##_image_attrs[] = { \
+ &dev_attr_##type##_image_version.attr, \
+ &dev_attr_##type##_image_variant.attr, \
+ &dev_attr_##type##_image_crm_version.attr, \
+ NULL, \
+ }; \
+static struct attribute_group type##_image_attr_group = { \
+ .attrs = type##_image_attrs, \
+}
+
+/*
+ * Qcom SoC types
+ */
+enum qcom_cpu {
+ MSM_CPU_UNKNOWN = 0,
+ MSM_CPU_8960,
+ MSM_CPU_8960AB,
+ MSM_CPU_8064,
+ MSM_CPU_8974,
+ MSM_CPU_8974PRO_AA,
+ MSM_CPU_8974PRO_AB,
+ MSM_CPU_8974PRO_AC,
+ MSM_CPU_8916,
+ MSM_CPU_8084,
+ MSM_CPU_8996
+};
+
+struct qcom_soc_info {
+ enum qcom_cpu generic_soc_type;
+ char *soc_id_string;
+};
+
+/* Hardware platform types */
+static const char *hw_platform[] = {
+ [0] = "Unknown",
+ [1] = "Surf",
+ [2] = "FFA",
+ [3] = "Fluid",
+ [4] = "SVLTE_FFA",
+ [5] = "SLVTE_SURF",
+ [7] = "MDM_MTP_NO_DISPLAY",
+ [8] = "MTP",
+ [9] = "Liquid",
+ [10] = "Dragon",
+ [11] = "QRD",
+ [13] = "HRD",
+ [14] = "DTV",
+ [21] = "RCM",
+ [23] = "STP",
+ [24] = "SBC",
+};
+
+static const char *qrd_hw_platform_subtype[] = {
+ [0] = "QRD",
+ [1] = "SKUAA",
+ [2] = "SKUF",
+ [3] = "SKUAB",
+ [5] = "SKUG",
+ [6] = "INVALID",
+};
+
+static const char *hw_platform_subtype[] = {
+ "Unknown", "charm", "strange", "strange_2a", "Invalid",
+};
+
+static const char *pmic_model[] = {
+ [0] = "Unknown PMIC model",
+ [13] = "PMIC model: PM8058",
+ [14] = "PMIC model: PM8028",
+ [15] = "PMIC model: PM8901",
+ [16] = "PMIC model: PM8027",
+ [17] = "PMIC model: ISL9519",
+ [18] = "PMIC model: PM8921",
+ [19] = "PMIC model: PM8018",
+ [20] = "PMIC model: PM8015",
+ [21] = "PMIC model: PM8014",
+ [22] = "PMIC model: PM8821",
+ [23] = "PMIC model: PM8038",
+ [24] = "PMIC model: PM8922",
+ [25] = "PMIC model: PM8917",
+};
+
+struct smem_image_version {
+ char name[SMEM_IMAGE_VERSION_NAME_SIZE];
+ char variant[SMEM_IMAGE_VERSION_VARIANT_SIZE];
+ char pad;
+ char oem[SMEM_IMAGE_VERSION_OEM_SIZE];
+};
+
+/* Used to parse shared memory. Must match the modem. */
+struct socinfo_v0_1 {
+ u32 format;
+ u32 id;
+ u32 version;
+ char build_id[SMEM_SOCINFO_BUILD_ID_LENGTH];
+};
+
+struct socinfo_v0_2 {
+ struct socinfo_v0_1 v0_1;
+ u32 raw_version;
+};
+
+struct socinfo_v0_3 {
+ struct socinfo_v0_2 v0_2;
+ u32 hw_platform;
+};
+
+struct socinfo_v0_4 {
+ struct socinfo_v0_3 v0_3;
+ u32 platform_version;
+};
+
+struct socinfo_v0_5 {
+ struct socinfo_v0_4 v0_4;
+ u32 accessory_chip;
+};
+
+struct socinfo_v0_6 {
+ struct socinfo_v0_5 v0_5;
+ u32 hw_platform_subtype;
+};
+
+struct socinfo_v0_7 {
+ struct socinfo_v0_6 v0_6;
+ u32 pmic_model;
+ u32 pmic_die_revision;
+};
+
+struct socinfo_v0_8 {
+ struct socinfo_v0_7 v0_7;
+ u32 pmic_model_1;
+ u32 pmic_die_revision_1;
+ u32 pmic_model_2;
+ u32 pmic_die_revision_2;
+};
+
+struct socinfo_v0_9 {
+ struct socinfo_v0_8 v0_8;
+ u32 foundry_id;
+};
+
+struct socinfo_v0_10 {
+ struct socinfo_v0_9 v0_9;
+ u32 serial_number;
+};
+
+struct socinfo_v0_11 {
+ struct socinfo_v0_10 v0_10;
+ u32 num_pmics;
+ u32 pmic_array_offset;
+};
+
+struct socinfo_v0_12 {
+ struct socinfo_v0_11 v0_11;
+ u32 chip_family;
+ u32 raw_device_family;
+ u32 raw_device_number;
+};
+
+static union {
+ struct socinfo_v0_1 v0_1;
+ struct socinfo_v0_2 v0_2;
+ struct socinfo_v0_3 v0_3;
+ struct socinfo_v0_4 v0_4;
+ struct socinfo_v0_5 v0_5;
+ struct socinfo_v0_6 v0_6;
+ struct socinfo_v0_7 v0_7;
+ struct socinfo_v0_8 v0_8;
+ struct socinfo_v0_9 v0_9;
+ struct socinfo_v0_10 v0_10;
+ struct socinfo_v0_11 v0_11;
+ struct socinfo_v0_12 v0_12;
+} *socinfo;
+
+static struct smem_image_version *smem_image_version;
+static bool smem_img_tbl_avlbl = true;
+static bool hw_subtype_valid = true;
+static u32 hw_subtype;
+
+
+/* max socinfo format version supported */
+#define MAX_SOCINFO_FORMAT SOCINFO_FORMAT(12)
+
+static struct qcom_soc_info cpu_of_id[] = {
+
+ [0] = {MSM_CPU_UNKNOWN, "Unknown CPU"},
+
+ /* 8x60 IDs */
+ [87] = {MSM_CPU_8960, "MSM8960"},
+
+ /* 8x64 IDs */
+ [109] = {MSM_CPU_8064, "APQ8064"},
+ [130] = {MSM_CPU_8064, "MPQ8064"},
+
+ /* 8x60A IDs */
+ [122] = {MSM_CPU_8960, "MSM8660A"},
+ [123] = {MSM_CPU_8960, "MSM8260A"},
+ [124] = {MSM_CPU_8960, "APQ8060A"},
+
+ /* 8x74 IDs */
+ [126] = {MSM_CPU_8974, "MSM8974"},
+ [184] = {MSM_CPU_8974, "APQ8074"},
+ [185] = {MSM_CPU_8974, "MSM8274"},
+ [186] = {MSM_CPU_8974, "MSM8674"},
+
+ /* 8x74AA IDs */
+ [208] = {MSM_CPU_8974PRO_AA, "APQ8074-AA"},
+ [211] = {MSM_CPU_8974PRO_AA, "MSM8274-AA"},
+ [214] = {MSM_CPU_8974PRO_AA, "MSM8674-AA"},
+ [217] = {MSM_CPU_8974PRO_AA, "MSM8974-AA"},
+
+ /* 8x74AB IDs */
+ [209] = {MSM_CPU_8974PRO_AB, "APQ8074-AB"},
+ [212] = {MSM_CPU_8974PRO_AB, "MSM8274-AB"},
+ [215] = {MSM_CPU_8974PRO_AB, "MSM8674-AB"},
+ [218] = {MSM_CPU_8974PRO_AB, "MSM8974-AB"},
+
+ /* 8x74AC IDs */
+ [194] = {MSM_CPU_8974PRO_AC, "MSM8974PRO"},
+ [210] = {MSM_CPU_8974PRO_AC, "APQ8074PRO"},
+ [213] = {MSM_CPU_8974PRO_AC, "MSM8274PRO"},
+ [216] = {MSM_CPU_8974PRO_AC, "MSM8674PRO"},
+
+ /* 8x60AB IDs */
+ [138] = {MSM_CPU_8960AB, "MSM8960AB"},
+ [139] = {MSM_CPU_8960AB, "APQ8060AB"},
+ [140] = {MSM_CPU_8960AB, "MSM8260AB"},
+ [141] = {MSM_CPU_8960AB, "MSM8660AB"},
+
+ /* 8x84 IDs */
+ [178] = {MSM_CPU_8084, "APQ8084"},
+
+ /* 8x16 IDs */
+ [206] = {MSM_CPU_8916, "MSM8916"},
+ [247] = {MSM_CPU_8916, "APQ8016"},
+ [248] = {MSM_CPU_8916, "MSM8216"},
+ [249] = {MSM_CPU_8916, "MSM8116"},
+ [250] = {MSM_CPU_8916, "MSM8616"},
+
+ /* 8x96 IDs */
+ [246] = {MSM_CPU_8996, "MSM8996"},
+ [310] = {MSM_CPU_8996, "MSM8996AU"},
+ [311] = {MSM_CPU_8996, "APQ8096AU"},
+ [291] = {MSM_CPU_8996, "APQ8096"},
+ [305] = {MSM_CPU_8996, "MSM8996SG"},
+ [312] = {MSM_CPU_8996, "APQ8096SG"},
+
+ /*
+ * Uninitialized IDs are not known to run Linux.
+ * MSM_CPU_UNKNOWN is set to 0 to ensure these IDs are
+ * considered as unknown CPU.
+ */
+};
+
+static u32 socinfo_format;
+
+static u32 socinfo_get_id(void);
+
+/* socinfo: sysfs functions */
+
+static char *socinfo_get_id_string(void)
+{
+ return (socinfo) ? cpu_of_id[socinfo->v0_1.id].soc_id_string : NULL;
+}
+
+static char *socinfo_get_image_version_base_address(struct device *dev)
+{
+ size_t size, size_in;
+ void *ptr;
+
+ ptr = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_IMAGE_VERSION_TABLE,
+ &size);
+ if (IS_ERR(ptr))
+ return ptr;
+
+ size_in = SMEM_IMAGE_VERSION_SIZE;
+ if (size_in != size) {
+ dev_err(dev, "Wrong size for smem item\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ return ptr;
+}
+
+
+static u32 socinfo_get_version(void)
+{
+ return (socinfo) ? socinfo->v0_1.version : 0;
+}
+
+static char *socinfo_get_build_id(void)
+{
+ return (socinfo) ? socinfo->v0_1.build_id : NULL;
+}
+
+static u32 socinfo_get_raw_version(void)
+{
+ return socinfo ?
+ (socinfo_format >= SOCINFO_FORMAT(2) ?
+ socinfo->v0_2.raw_version : 0)
+ : 0;
+}
+
+static u32 socinfo_get_platform_type(void)
+{
+ return socinfo ?
+ (socinfo_format >= SOCINFO_FORMAT(3) ?
+ socinfo->v0_3.hw_platform : 0)
+ : 0;
+}
+
+static u32 socinfo_get_platform_version(void)
+{
+ return socinfo ?
+ (socinfo_format >= SOCINFO_FORMAT(4) ?
+ socinfo->v0_4.platform_version : 0)
+ : 0;
+}
+
+static u32 socinfo_get_platform_subtype(void)
+{
+ return socinfo ?
+ (socinfo_format >= SOCINFO_FORMAT(6) ?
+ socinfo->v0_6.hw_platform_subtype : 0)
+ : 0;
+}
+
+static u32 socinfo_get_serial_number(void)
+{
+ return socinfo ?
+ (socinfo_format >= SOCINFO_FORMAT(10) ?
+ socinfo->v0_10.serial_number : 0)
+ : 0;
+}
+
+static u32 socinfo_get_pmic_model(void)
+{
+ return socinfo ?
+ (socinfo_format >= SOCINFO_FORMAT(7) ?
+ socinfo->v0_7.pmic_model : PMIC_MODEL_UNKNOWN)
+ : PMIC_MODEL_UNKNOWN;
+}
+
+static u32 socinfo_get_pmic_die_revision(void)
+{
+ return socinfo ?
+ (socinfo_format >= SOCINFO_FORMAT(7) ?
+ socinfo->v0_7.pmic_die_revision : 0)
+ : 0;
+}
+
+
+static ssize_t
+qcom_get_vendor(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%s", "Qualcomm\n");
+}
+
+static ssize_t
+qcom_get_raw_version(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%u\n",
+ socinfo_get_raw_version());
+}
+
+static ssize_t
+qcom_get_build_id(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return scnprintf(buf, SMEM_SOCINFO_BUILD_ID_LENGTH, "%s\n",
+ socinfo_get_build_id());
+}
+
+static ssize_t
+qcom_get_hw_platform(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ u32 hw_type;
+
+ hw_type = socinfo_get_platform_type();
+
+ return sprintf(buf, "%s\n", hw_platform[hw_type]);
+}
+
+static ssize_t
+qcom_get_platform_version(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%u\n", socinfo_get_platform_version());
+}
+
+static ssize_t
+qcom_get_accessory_chip(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ u32 acc_chip = socinfo ? (socinfo_format >= SOCINFO_FORMAT(5) ?
+ socinfo->v0_5.accessory_chip : 0) : 0;
+ return sprintf(buf, "%u\n", acc_chip);
+}
+
+static ssize_t
+qcom_get_platform_subtype(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ if (socinfo_get_platform_type() == HW_PLATFORM_QRD) {
+ return sprintf(buf, "%s\n",
+ qrd_hw_platform_subtype[hw_subtype]);
+ } else {
+ return sprintf(buf, "%s\n",
+ hw_platform_subtype[hw_subtype]);
+ }
+}
+
+static ssize_t
+qcom_get_platform_subtype_id(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%u\n", socinfo_get_platform_subtype());
+}
+
+static ssize_t
+qcom_get_foundry_id(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ u32 foundry_id = socinfo ? (socinfo_format >= SOCINFO_FORMAT(9) ?
+ socinfo->v0_9.foundry_id : 0) : 0;
+ return sprintf(buf, "%u\n", foundry_id);
+}
+
+static ssize_t
+qcom_get_serial_number(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%u\n", socinfo_get_serial_number());
+}
+
+static ssize_t
+qcom_get_chip_family(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ u32 chip_family = socinfo ? (socinfo_format >= SOCINFO_FORMAT(12) ?
+ socinfo->v0_12.chip_family : 0) : 0;
+ return sprintf(buf, "0x%x\n", chip_family);
+}
+
+static ssize_t
+qcom_get_raw_device_family(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ u32 raw_dev_fam = socinfo ? (socinfo_format >= SOCINFO_FORMAT(12) ?
+ socinfo->v0_12.raw_device_family : 0) : 0;
+ return sprintf(buf, "0x%x\n", raw_dev_fam);
+}
+
+static ssize_t
+qcom_get_raw_device_number(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ u32 raw_dev_num = socinfo ? (socinfo_format >= SOCINFO_FORMAT(12) ?
+ socinfo->v0_12.raw_device_number : 0) : 0;
+ return sprintf(buf, "0x%x\n", raw_dev_num);
+}
+
+static ssize_t
+qcom_get_pmic_model(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ u32 pmic_id = socinfo_get_pmic_model();
+
+ return sprintf(buf, "%s\n", pmic_model[pmic_id]);
+}
+
+static ssize_t
+qcom_get_pmic_die_revision(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return sprintf(buf, "%u\n", socinfo_get_pmic_die_revision());
+}
+
+static ssize_t
+qcom_get_image_version(int index, char *buf)
+{
+ return scnprintf(buf, SMEM_IMAGE_VERSION_NAME_SIZE, "%s\n",
+ smem_image_version[index].name);
+}
+
+static ssize_t
+qcom_set_image_version(int index, const char *buf)
+{
+ return strlcpy(smem_image_version[index].name, buf,
+ SMEM_IMAGE_VERSION_NAME_SIZE);
+}
+
+static ssize_t
+qcom_get_image_variant(int index, char *buf)
+{
+ return scnprintf(buf, SMEM_IMAGE_VERSION_VARIANT_SIZE, "%s\n",
+ smem_image_version[index].variant);
+}
+
+static ssize_t
+qcom_set_image_variant(int index, const char *buf)
+{
+ return strlcpy(smem_image_version[index].variant, buf,
+ SMEM_IMAGE_VERSION_VARIANT_SIZE);
+}
+
+static ssize_t
+qcom_get_image_crm_version(int index, char *buf)
+{
+ return scnprintf(buf, SMEM_IMAGE_VERSION_OEM_SIZE, "%s\n",
+ smem_image_version[index].oem);
+}
+
+static ssize_t
+qcom_set_image_crm_version(int index, const char *buf)
+{
+ return strlcpy(smem_image_version[index].oem, buf,
+ SMEM_IMAGE_VERSION_OEM_SIZE);
+}
+
+static struct device_attribute qcom_soc_attr_raw_version =
+ __ATTR(raw_version, 0444, qcom_get_raw_version, NULL);
+
+static struct device_attribute qcom_soc_attr_vendor =
+ __ATTR(vendor, 0444, qcom_get_vendor, NULL);
+
+static struct device_attribute qcom_soc_attr_build_id =
+ __ATTR(build_id, 0444, qcom_get_build_id, NULL);
+
+static struct device_attribute qcom_soc_attr_hw_platform =
+ __ATTR(hw_platform, 0444, qcom_get_hw_platform, NULL);
+
+
+static struct device_attribute qcom_soc_attr_platform_version =
+ __ATTR(platform_version, 0444,
+ qcom_get_platform_version, NULL);
+
+static struct device_attribute qcom_soc_attr_accessory_chip =
+ __ATTR(accessory_chip, 0444,
+ qcom_get_accessory_chip, NULL);
+
+static struct device_attribute qcom_soc_attr_platform_subtype =
+ __ATTR(platform_subtype, 0444,
+ qcom_get_platform_subtype, NULL);
+
+static struct device_attribute qcom_soc_attr_platform_subtype_id =
+ __ATTR(platform_subtype_id, 0444,
+ qcom_get_platform_subtype_id, NULL);
+
+static struct device_attribute qcom_soc_attr_foundry_id =
+ __ATTR(foundry_id, 0444,
+ qcom_get_foundry_id, NULL);
+
+static struct device_attribute qcom_soc_attr_serial_number =
+ __ATTR(serial_number, 0444,
+ qcom_get_serial_number, NULL);
+
+static struct device_attribute qcom_soc_attr_chip_family =
+ __ATTR(chip_family, 0444,
+ qcom_get_chip_family, NULL);
+
+static struct device_attribute qcom_soc_attr_raw_device_family =
+ __ATTR(raw_device_family, 0444,
+ qcom_get_raw_device_family, NULL);
+
+static struct device_attribute qcom_soc_attr_raw_device_number =
+ __ATTR(raw_device_number, 0444,
+ qcom_get_raw_device_number, NULL);
+
+static struct device_attribute qcom_soc_attr_pmic_model =
+ __ATTR(pmic_model, 0444,
+ qcom_get_pmic_model, NULL);
+
+static struct device_attribute qcom_soc_attr_pmic_die_revision =
+ __ATTR(pmic_die_revision, 0444,
+ qcom_get_pmic_die_revision, NULL);
+
+SMEM_IMAGE_TABLE_RO_ATTR(boot, SMEM_IMAGE_TABLE_BOOT_INDEX);
+SMEM_IMAGE_TABLE_RO_ATTR(tz, SMEM_IMAGE_TABLE_TZ_INDEX);
+SMEM_IMAGE_TABLE_RO_ATTR(rpm, SMEM_IMAGE_TABLE_RPM_INDEX);
+SMEM_IMAGE_TABLE_ATTR(apps, SMEM_IMAGE_TABLE_APPS_INDEX);
+SMEM_IMAGE_TABLE_RO_ATTR(mpss, SMEM_IMAGE_TABLE_MPSS_INDEX);
+SMEM_IMAGE_TABLE_RO_ATTR(adsp, SMEM_IMAGE_TABLE_ADSP_INDEX);
+SMEM_IMAGE_TABLE_RO_ATTR(cnss, SMEM_IMAGE_TABLE_CNSS_INDEX);
+SMEM_IMAGE_TABLE_RO_ATTR(video, SMEM_IMAGE_TABLE_VIDEO_INDEX);
+
+static struct attribute_group
+ *smem_image_table[SMEM_IMAGE_VERSION_BLOCKS_COUNT] = {
+ [SMEM_IMAGE_TABLE_BOOT_INDEX] = &boot_image_attr_group,
+ [SMEM_IMAGE_TABLE_TZ_INDEX] = &tz_image_attr_group,
+ [SMEM_IMAGE_TABLE_RPM_INDEX] = &rpm_image_attr_group,
+ [SMEM_IMAGE_TABLE_APPS_INDEX] = &apps_image_attr_group,
+ [SMEM_IMAGE_TABLE_MPSS_INDEX] = &mpss_image_attr_group,
+ [SMEM_IMAGE_TABLE_ADSP_INDEX] = &adsp_image_attr_group,
+ [SMEM_IMAGE_TABLE_CNSS_INDEX] = &cnss_image_attr_group,
+ [SMEM_IMAGE_TABLE_VIDEO_INDEX] = &video_image_attr_group,
+};
+
+static int socinfo_populate_sysfs_files(struct device *qcom_soc_device)
+{
+ int err, img_idx;
+
+ /*
+ * Expose SMEM_IMAGE_TABLE to sysfs only when we have IMAGE_TABLE
+ * available in SMEM. As IMAGE_TABLE and SOCINFO are two separate
+ * items within SMEM, we expose the remaining soc information(i.e
+ * only the SOCINFO item available in SMEM) to sysfs even in the
+ * absence of an IMAGE_TABLE.
+ */
+ if (smem_img_tbl_avlbl) {
+ for (img_idx = 0; img_idx < SMEM_IMAGE_VERSION_BLOCKS_COUNT;
+ img_idx++) {
+ if (smem_image_table[img_idx]) {
+ err = sysfs_create_group(&qcom_soc_device->kobj,
+ smem_image_table[img_idx]);
+ if (err)
+ break;
+ }
+ }
+ }
+ err = device_create_file(qcom_soc_device, &qcom_soc_attr_vendor);
+ if (!err) {
+ switch (socinfo_format) {
+ case SOCINFO_FORMAT(12):
+ err = device_create_file(qcom_soc_device,
+ &qcom_soc_attr_chip_family);
+ if (!err)
+ err = device_create_file(qcom_soc_device,
+ &qcom_soc_attr_raw_device_family);
+ if (!err)
+ err = device_create_file(qcom_soc_device,
+ &qcom_soc_attr_raw_device_number);
+ case SOCINFO_FORMAT(11):
+ case SOCINFO_FORMAT(10):
+ if (!err)
+ err = device_create_file(qcom_soc_device,
+ &qcom_soc_attr_serial_number);
+ case SOCINFO_FORMAT(9):
+ if (!err)
+ err = device_create_file(qcom_soc_device,
+ &qcom_soc_attr_foundry_id);
+ case SOCINFO_FORMAT(8):
+ case SOCINFO_FORMAT(7):
+ if (!err)
+ err = device_create_file(qcom_soc_device,
+ &qcom_soc_attr_pmic_model);
+ if (!err)
+ err = device_create_file(qcom_soc_device,
+ &qcom_soc_attr_pmic_die_revision);
+ case SOCINFO_FORMAT(6):
+ if (hw_subtype_valid)
+ if (!err)
+ err = device_create_file(
+ qcom_soc_device,
+ &qcom_soc_attr_platform_subtype);
+ if (!err)
+ err = device_create_file(qcom_soc_device,
+ &qcom_soc_attr_platform_subtype_id);
+ case SOCINFO_FORMAT(5):
+ if (!err)
+ err = device_create_file(qcom_soc_device,
+ &qcom_soc_attr_accessory_chip);
+ case SOCINFO_FORMAT(4):
+ if (!err)
+ err = device_create_file(qcom_soc_device,
+ &qcom_soc_attr_platform_version);
+ case SOCINFO_FORMAT(3):
+ if (!err)
+ err = device_create_file(qcom_soc_device,
+ &qcom_soc_attr_hw_platform);
+ case SOCINFO_FORMAT(2):
+ if (!err)
+ err = device_create_file(qcom_soc_device,
+ &qcom_soc_attr_raw_version);
+ case SOCINFO_FORMAT(1):
+ if (!err)
+ err = device_create_file(qcom_soc_device,
+ &qcom_soc_attr_build_id);
+ if (err) {
+ dev_err(qcom_soc_device,
+ "Could not create sysfs entry\n");
+ return err;
+ }
+ return 0;
+ default:
+ dev_err(qcom_soc_device, "Unknown socinfo format:
v0.%u\n",
+ SOCINFO_VERSION_MINOR(socinfo_format));
+ return -EINVAL;
+ }
+ } else {
+ dev_err(qcom_soc_device, "Could not create sysfs entry\n");
+ return err;
+ }
+}
+
+static int socinfo_init_sysfs(struct device *dev)
+{
+ struct device *qcom_soc_device;
+ struct soc_device *soc_dev;
+ struct soc_device_attribute *soc_dev_attr;
+ u32 soc_version;
+
+ soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
+ if (!soc_dev_attr)
+ return -ENOMEM;
+
+ soc_version = socinfo_get_version();
+
+ soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%d", socinfo_get_id());
+ soc_dev_attr->family = "Snapdragon";
+ soc_dev_attr->machine = socinfo_get_id_string();
+ soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%u.%u",
+ SOC_VERSION_MAJOR(soc_version),
+ SOC_VERSION_MINOR(soc_version));
+
+ soc_dev = soc_device_register(soc_dev_attr);
+ if (IS_ERR(soc_dev)) {
+ kfree(soc_dev_attr);
+ return PTR_ERR(soc_dev);
+ }
+
+ qcom_soc_device = soc_device_to_device(soc_dev);
+ socinfo_populate_sysfs_files(qcom_soc_device);
+ return 0;
+}
+
+static u32 socinfo_get_id(void)
+{
+ return (socinfo) ? socinfo->v0_1.id : 0;
+}
+
+static void socinfo_print(struct device *dev)
+{
+ u32 f_min = SOCINFO_VERSION_MINOR(socinfo_format);
+ u32 v_maj = SOC_VERSION_MAJOR(socinfo->v0_1.version);
+ u32 v_min = SOC_VERSION_MINOR(socinfo->v0_1.version);
+
+ switch (socinfo_format) {
+ case SOCINFO_FORMAT(1):
+ dev_info(dev, "socinfo: v0.%u, id=%u, ver=%u.%u\n",
+ f_min, socinfo->v0_1.id, v_maj, v_min);
+ break;
+ case SOCINFO_FORMAT(2):
+ dev_info(dev, "socinfo: v0.%u, id=%u, ver=%u.%u, raw_ver=%u\n",
+ f_min, socinfo->v0_1.id, v_maj, v_min,
+ socinfo->v0_2.raw_version);
+ break;
+ case SOCINFO_FORMAT(3):
+ dev_info(dev, "socinfo: v0.%u, id=%u, ver=%u.%u, raw_ver=%u,
hw_plat=%u\n",
+ f_min, socinfo->v0_1.id,
+ v_maj, v_min, socinfo->v0_2.raw_version,
+ socinfo->v0_3.hw_platform);
+ break;
+ case SOCINFO_FORMAT(4):
+ dev_info(dev, "socinfo: v0.%u, id=%u, ver=%u.%u, raw_ver=%u,
hw_plat=%u, hw_plat_ver=%u\n",
+ f_min, socinfo->v0_1.id, v_maj, v_min,
+ socinfo->v0_2.raw_version,
+ socinfo->v0_3.hw_platform,
+ socinfo->v0_4.platform_version);
+ break;
+ case SOCINFO_FORMAT(5):
+ dev_info(dev, "socinfo: v0.%u, id=%u, ver=%u.%u, raw_ver=%u,
hw_plat=%u, hw_plat_ver=%u accessory_chip=%u\n",
+ f_min, socinfo->v0_1.id, v_maj, v_min,
+ socinfo->v0_2.raw_version,
+ socinfo->v0_3.hw_platform,
+ socinfo->v0_4.platform_version,
+ socinfo->v0_5.accessory_chip);
+ break;
+ case SOCINFO_FORMAT(6):
+ dev_info(dev, "socinfo: v0.%u, id=%u, ver=%u.%u, raw_ver=%u,
hw_plat=%u, hw_plat_ver=%u accessory_chip=%u, hw_plat_subtype=%u\n",
+ f_min, socinfo->v0_1.id,
+ v_maj, v_min, socinfo->v0_2.raw_version,
+ socinfo->v0_3.hw_platform,
+ socinfo->v0_4.platform_version,
+ socinfo->v0_5.accessory_chip,
+ socinfo->v0_6.hw_platform_subtype);
+ break;
+ case SOCINFO_FORMAT(7):
+ case SOCINFO_FORMAT(8):
+ dev_info(dev, "socinfo: v0.%u, id=%u, ver=%u.%u, raw_ver=%u,
hw_plat=%u, hw_plat_ver=%u accessory_chip=%u, hw_plat_subtype=%u,
pmic_model=%u, pmic_die_revision=%u\n",
+ f_min, socinfo->v0_1.id, v_maj, v_min,
+ socinfo->v0_2.raw_version,
+ socinfo->v0_3.hw_platform,
+ socinfo->v0_4.platform_version,
+ socinfo->v0_5.accessory_chip,
+ socinfo->v0_6.hw_platform_subtype,
+ socinfo->v0_7.pmic_model,
+ socinfo->v0_7.pmic_die_revision);
+ break;
+ case SOCINFO_FORMAT(9):
+ dev_info(dev, "socinfo: v0.%u, id=%u, ver=%u.%u, raw_ver=%u,
hw_plat=%u, hw_plat_ver=%u accessory_chip=%u, hw_plat_subtype=%u,
pmic_model=%u, pmic_die_revision=%u foundry_id=%u\n",
+ f_min, socinfo->v0_1.id, v_maj, v_min,
+ socinfo->v0_2.raw_version,
+ socinfo->v0_3.hw_platform,
+ socinfo->v0_4.platform_version,
+ socinfo->v0_5.accessory_chip,
+ socinfo->v0_6.hw_platform_subtype,
+ socinfo->v0_7.pmic_model,
+ socinfo->v0_7.pmic_die_revision,
+ socinfo->v0_9.foundry_id);
+ break;
+ case SOCINFO_FORMAT(10):
+ dev_info(dev, "socinfo: v0.%u, id=%u, ver=%u.%u, raw_ver=%u,
hw_plat=%u, hw_plat_ver=%u accessory_chip=%u, hw_plat_subtype=%u,
pmic_model=%u, pmic_die_revision=%u, foundry_id=%u, serial_number=%u\n",
+ f_min, socinfo->v0_1.id, v_maj, v_min,
+ socinfo->v0_2.raw_version,
+ socinfo->v0_3.hw_platform,
+ socinfo->v0_4.platform_version,
+ socinfo->v0_5.accessory_chip,
+ socinfo->v0_6.hw_platform_subtype,
+ socinfo->v0_7.pmic_model,
+ socinfo->v0_7.pmic_die_revision,
+ socinfo->v0_9.foundry_id,
+ socinfo->v0_10.serial_number);
+ break;
+ case SOCINFO_FORMAT(11):
+ dev_info(dev, "socinfo: v0.%u, id=%u, ver=%u.%u, raw_ver=%u,
hw_plat=%u, hw_plat_ver=%u, accessory_chip=%u, hw_plat_subtype=%u,
pmic_model=%u, pmic_die_revision=%u, foundry_id=%u, serial_number=%u
num_pmics=%u\n",
+ f_min, socinfo->v0_1.id, v_maj, v_min,
+ socinfo->v0_2.raw_version,
+ socinfo->v0_3.hw_platform,
+ socinfo->v0_4.platform_version,
+ socinfo->v0_5.accessory_chip,
+ socinfo->v0_6.hw_platform_subtype,
+ socinfo->v0_7.pmic_model,
+ socinfo->v0_7.pmic_die_revision,
+ socinfo->v0_9.foundry_id,
+ socinfo->v0_10.serial_number,
+ socinfo->v0_11.num_pmics);
+ break;
+ case SOCINFO_FORMAT(12):
+ dev_info(dev, "socinfo: v0.%u, id=%u, ver=%u.%u, raw_ver=%u,
hw_plat=%u, hw_plat_ver=%u accessory_chip=%u, hw_plat_subtype=%u,
pmic_model=%u, pmic_die_revision=%u, foundry_id=%u, serial_number=%u,
num_pmics=%u, chip_family=0x%x, raw_device_family=0x%x,
raw_device_number=0x%x\n",
+ f_min, socinfo->v0_1.id, v_maj, v_min,
+ socinfo->v0_2.raw_version,
+ socinfo->v0_3.hw_platform,
+ socinfo->v0_4.platform_version,
+ socinfo->v0_5.accessory_chip,
+ socinfo->v0_6.hw_platform_subtype,
+ socinfo->v0_7.pmic_model,
+ socinfo->v0_7.pmic_die_revision,
+ socinfo->v0_9.foundry_id,
+ socinfo->v0_10.serial_number,
+ socinfo->v0_11.num_pmics,
+ socinfo->v0_12.chip_family,
+ socinfo->v0_12.raw_device_family,
+ socinfo->v0_12.raw_device_number);
+ break;
+
+ default:
+ dev_err(dev, "socinfo: Unknown format found: v0.%u\n", f_min);
+ break;
+ }
+}
+
+static int socinfo_select_format(struct device *dev)
+{
+ u32 f_maj = SOCINFO_VERSION_MAJOR(socinfo->v0_1.format);
+ u32 f_min = SOCINFO_VERSION_MINOR(socinfo->v0_1.format);
+
+ if (f_maj != 0) {
+ dev_err(dev, "Unsupported format v%u.%u.\n",
+ f_maj, f_min);
+ return -EINVAL;
+ }
+
+ if (socinfo->v0_1.format > MAX_SOCINFO_FORMAT) {
+ dev_warn(dev, "Unsupported format v%u.%u. Falling back to
v%u.%u.\n",
+ f_maj, f_min, SOCINFO_VERSION_MAJOR(MAX_SOCINFO_FORMAT),
+ SOCINFO_VERSION_MINOR(MAX_SOCINFO_FORMAT));
+ socinfo_format = MAX_SOCINFO_FORMAT;
+ } else {
+ socinfo_format = socinfo->v0_1.format;
+ }
+ return 0;
+}
+
+int qcom_socinfo_init(struct platform_device *pdev)
+{
+ size_t size;
+
+ socinfo = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_HW_SW_BUILD_ID,
+ &size);
+ if (IS_ERR(socinfo) || (socinfo_select_format(&pdev->dev) < 0)) {
+ dev_warn(&pdev->dev,
+ "Coudn't find soc information; Unable to setup
socinfo.\n");
+ return -ENOMEM;
+ }
+
+ if (!socinfo_get_id()) {
+ dev_err(&pdev->dev, "socinfo: Unknown SoC ID!\n");
+ return -EINVAL;
+ }
+
+ WARN(socinfo_get_id() >= ARRAY_SIZE(cpu_of_id),
+ "New IDs added! ID => CPU mapping needs an update.\n");
+
+ socinfo_print(&pdev->dev);
+
+ smem_image_version = (struct smem_image_version *)
+ socinfo_get_image_version_base_address(&pdev->dev);
+ if (IS_ERR(smem_image_version)) {
+ dev_warn(&pdev->dev, "Unable to get address for image version
table.\n");
+ smem_img_tbl_avlbl = false;
+ }
+
+ hw_subtype = socinfo_get_platform_subtype();
+ if (socinfo_get_platform_type() == HW_PLATFORM_QRD) {
+ if (hw_subtype >= PLATFORM_SUBTYPE_QRD_INVALID) {
+ dev_err(&pdev->dev, "Invalid hardware platform sub type
for qrd found\n");
+ hw_subtype_valid = false;
+ }
+ } else {
+ if (hw_subtype >= PLATFORM_SUBTYPE_INVALID) {
+ dev_err(&pdev->dev, "Invalid hardware platform
subtype\n");
+ hw_subtype_valid = false;
+ }
+ }
+
+ socinfo_init_sysfs(&pdev->dev);
+
+ /* Feed the soc specific unique data into entropy pool */
+ add_device_randomness(socinfo, size);
+
+ return 0;
+}
+EXPORT_SYMBOL(qcom_socinfo_init);
+
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
