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soc: qcom: Add socinfo driver

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The Qualcomm socinfo driver exposes information about the SoC, its
version and its serial number to user space.

Tested-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Imran Khan <kimran@codeaurora.org>
[Bjorn: Extract code to platform_driver, split patch in multiple]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
[Vaishali: Simplify declarations, introduce qcom_socinfo struct, Fix
           memory leak, Remove extra code and Misc code refactoring]
Signed-off-by: Vaishali Thakkar <vaishali.thakkar@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
This commit is contained in:
Imran Khan 2019-07-24 04:05:13 +05:30 committed by Bjorn Andersson
parent f7ccc7a397
commit efb448d0a3
4 changed files with 212 additions and 0 deletions
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8
drivers/soc/qcom/Kconfig
View File

@ -175,6 +175,14 @@ config QCOM_SMSM
Say yes here to support the Qualcomm Shared Memory State Machine.
The state machine is represented by bits in shared memory.
config QCOM_SOCINFO
tristate "Qualcomm socinfo driver"
depends on QCOM_SMEM
select SOC_BUS
help
Say yes here to support the Qualcomm socinfo driver, providing
information about the SoC to user space.
config QCOM_WCNSS_CTRL
tristate "Qualcomm WCNSS control driver"
depends on ARCH_QCOM || COMPILE_TEST

1
drivers/soc/qcom/Makefile
View File

@ -18,6 +18,7 @@ obj-$(CONFIG_QCOM_SMEM) += smem.o
obj-$(CONFIG_QCOM_SMEM_STATE) += smem_state.o
obj-$(CONFIG_QCOM_SMP2P) += smp2p.o
obj-$(CONFIG_QCOM_SMSM) += smsm.o
obj-$(CONFIG_QCOM_SOCINFO) += socinfo.o
obj-$(CONFIG_QCOM_WCNSS_CTRL) += wcnss_ctrl.o
obj-$(CONFIG_QCOM_APR) += apr.o
obj-$(CONFIG_QCOM_LLCC) += llcc-slice.o

9
drivers/soc/qcom/smem.c
View File

@ -268,6 +268,7 @@ struct qcom_smem {
struct smem_partition_header *partitions[SMEM_HOST_COUNT];
size_t cacheline[SMEM_HOST_COUNT];
u32 item_count;
struct platform_device *socinfo;
unsigned num_regions;
struct smem_region regions[];
@ -963,11 +964,19 @@ static int qcom_smem_probe(struct platform_device *pdev)
__smem = smem;
smem->socinfo = platform_device_register_data(&pdev->dev, "qcom-socinfo",
PLATFORM_DEVID_NONE, NULL,
0);
if (IS_ERR(smem->socinfo))
dev_dbg(&pdev->dev, "failed to register socinfo device\n");
return 0;
}
static int qcom_smem_remove(struct platform_device *pdev)
{
platform_device_unregister(__smem->socinfo);
hwspin_lock_free(__smem->hwlock);
__smem = NULL;

194
drivers/soc/qcom/socinfo.c Normal file
View File

@ -0,0 +1,194 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2009-2017, The Linux Foundation. All rights reserved.
* Copyright (c) 2017-2019, Linaro Ltd.
*/
#include <linux/err.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/soc/qcom/smem.h>
#include <linux/string.h>
#include <linux/sys_soc.h>
#include <linux/types.h>
/*
* SoC version type with major number in the upper 16 bits and minor
* number in the lower 16 bits.
*/
#define SOCINFO_MAJOR(ver) (((ver) >> 16) & 0xffff)
#define SOCINFO_MINOR(ver) ((ver) & 0xffff)
#define SMEM_SOCINFO_BUILD_ID_LENGTH 32
/*
* SMEM item id, used to acquire handles to respective
* SMEM region.
*/
#define SMEM_HW_SW_BUILD_ID 137
/* Socinfo SMEM item structure */
struct socinfo {
__le32 fmt;
__le32 id;
__le32 ver;
char build_id[SMEM_SOCINFO_BUILD_ID_LENGTH];
/* Version 2 */
__le32 raw_id;
__le32 raw_ver;
/* Version 3 */
__le32 hw_plat;
/* Version 4 */
__le32 plat_ver;
/* Version 5 */
__le32 accessory_chip;
/* Version 6 */
__le32 hw_plat_subtype;
/* Version 7 */
__le32 pmic_model;
__le32 pmic_die_rev;
/* Version 8 */
__le32 pmic_model_1;
__le32 pmic_die_rev_1;
__le32 pmic_model_2;
__le32 pmic_die_rev_2;
/* Version 9 */
__le32 foundry_id;
/* Version 10 */
__le32 serial_num;
/* Version 11 */
__le32 num_pmics;
__le32 pmic_array_offset;
/* Version 12 */
__le32 chip_family;
__le32 raw_device_family;
__le32 raw_device_num;
};
struct qcom_socinfo {
struct soc_device *soc_dev;
struct soc_device_attribute attr;
};
struct soc_id {
unsigned int id;
const char *name;
};
static const struct soc_id soc_id[] = {
{ 87, "MSM8960" },
{ 109, "APQ8064" },
{ 122, "MSM8660A" },
{ 123, "MSM8260A" },
{ 124, "APQ8060A" },
{ 126, "MSM8974" },
{ 130, "MPQ8064" },
{ 138, "MSM8960AB" },
{ 139, "APQ8060AB" },
{ 140, "MSM8260AB" },
{ 141, "MSM8660AB" },
{ 178, "APQ8084" },
{ 184, "APQ8074" },
{ 185, "MSM8274" },
{ 186, "MSM8674" },
{ 194, "MSM8974PRO" },
{ 206, "MSM8916" },
{ 208, "APQ8074-AA" },
{ 209, "APQ8074-AB" },
{ 210, "APQ8074PRO" },
{ 211, "MSM8274-AA" },
{ 212, "MSM8274-AB" },
{ 213, "MSM8274PRO" },
{ 214, "MSM8674-AA" },
{ 215, "MSM8674-AB" },
{ 216, "MSM8674PRO" },
{ 217, "MSM8974-AA" },
{ 218, "MSM8974-AB" },
{ 246, "MSM8996" },
{ 247, "APQ8016" },
{ 248, "MSM8216" },
{ 249, "MSM8116" },
{ 250, "MSM8616" },
{ 291, "APQ8096" },
{ 305, "MSM8996SG" },
{ 310, "MSM8996AU" },
{ 311, "APQ8096AU" },
{ 312, "APQ8096SG" },
};
static const char *socinfo_machine(struct device *dev, unsigned int id)
{
int idx;
for (idx = 0; idx < ARRAY_SIZE(soc_id); idx++) {
if (soc_id[idx].id == id)
return soc_id[idx].name;
}
return NULL;
}
static int qcom_socinfo_probe(struct platform_device *pdev)
{
struct qcom_socinfo *qs;
struct socinfo *info;
size_t item_size;
info = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_HW_SW_BUILD_ID,
&item_size);
if (IS_ERR(info)) {
dev_err(&pdev->dev, "Couldn't find socinfo\n");
return PTR_ERR(info);
}
qs = devm_kzalloc(&pdev->dev, sizeof(*qs), GFP_KERNEL);
if (!qs)
return -ENOMEM;
qs->attr.family = "Snapdragon";
qs->attr.machine = socinfo_machine(&pdev->dev,
le32_to_cpu(info->id));
qs->attr.revision = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%u.%u",
SOCINFO_MAJOR(le32_to_cpu(info->ver)),
SOCINFO_MINOR(le32_to_cpu(info->ver)));
if (offsetof(struct socinfo, serial_num) <= item_size)
qs->attr.serial_number = devm_kasprintf(&pdev->dev, GFP_KERNEL,
"%u",
le32_to_cpu(info->serial_num));
qs->soc_dev = soc_device_register(&qs->attr);
if (IS_ERR(qs->soc_dev))
return PTR_ERR(qs->soc_dev);
/* Feed the soc specific unique data into entropy pool */
add_device_randomness(info, item_size);
platform_set_drvdata(pdev, qs->soc_dev);
return 0;
}
static int qcom_socinfo_remove(struct platform_device *pdev)
{
struct qcom_socinfo *qs = platform_get_drvdata(pdev);
soc_device_unregister(qs->soc_dev);
return 0;
}
static struct platform_driver qcom_socinfo_driver = {
.probe = qcom_socinfo_probe,
.remove = qcom_socinfo_remove,
.driver = {
.name = "qcom-socinfo",
},
};
module_platform_driver(qcom_socinfo_driver);
MODULE_DESCRIPTION("Qualcomm SoCinfo driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:qcom-socinfo");