soc: qcom: Add socinfo driver
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>
alistair/sunxi64-5.4-dsi
Imran Khan
Bjorn Andersson
parent
f7ccc7a397
commit
efb448d0a3
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@ -175,6 +175,14 @@ config QCOM_SMSM
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Say yes here to support the Qualcomm Shared Memory State Machine.
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The state machine is represented by bits in shared memory.
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config QCOM_SOCINFO
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tristate "Qualcomm socinfo driver"
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depends on QCOM_SMEM
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select SOC_BUS
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help
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Say yes here to support the Qualcomm socinfo driver, providing
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information about the SoC to user space.
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config QCOM_WCNSS_CTRL
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tristate "Qualcomm WCNSS control driver"
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depends on ARCH_QCOM || COMPILE_TEST
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@ -18,6 +18,7 @@ obj-$(CONFIG_QCOM_SMEM) += smem.o
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obj-$(CONFIG_QCOM_SMEM_STATE) += smem_state.o
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obj-$(CONFIG_QCOM_SMP2P) += smp2p.o
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obj-$(CONFIG_QCOM_SMSM) += smsm.o
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obj-$(CONFIG_QCOM_SOCINFO) += socinfo.o
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obj-$(CONFIG_QCOM_WCNSS_CTRL) += wcnss_ctrl.o
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obj-$(CONFIG_QCOM_APR) += apr.o
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obj-$(CONFIG_QCOM_LLCC) += llcc-slice.o
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@ -268,6 +268,7 @@ struct qcom_smem {
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struct smem_partition_header *partitions[SMEM_HOST_COUNT];
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size_t cacheline[SMEM_HOST_COUNT];
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u32 item_count;
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struct platform_device *socinfo;
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unsigned num_regions;
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struct smem_region regions[];
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@ -963,11 +964,19 @@ static int qcom_smem_probe(struct platform_device *pdev)
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__smem = smem;
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smem->socinfo = platform_device_register_data(&pdev->dev, "qcom-socinfo",
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PLATFORM_DEVID_NONE, NULL,
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0);
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if (IS_ERR(smem->socinfo))
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dev_dbg(&pdev->dev, "failed to register socinfo device\n");
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return 0;
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}
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static int qcom_smem_remove(struct platform_device *pdev)
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{
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platform_device_unregister(__smem->socinfo);
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hwspin_lock_free(__smem->hwlock);
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__smem = NULL;
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@ -0,0 +1,194 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2009-2017, The Linux Foundation. All rights reserved.
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* Copyright (c) 2017-2019, Linaro Ltd.
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*/
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/random.h>
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#include <linux/slab.h>
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#include <linux/soc/qcom/smem.h>
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#include <linux/string.h>
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#include <linux/sys_soc.h>
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#include <linux/types.h>
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/*
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* SoC version type with major number in the upper 16 bits and minor
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* number in the lower 16 bits.
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*/
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#define SOCINFO_MAJOR(ver) (((ver) >> 16) & 0xffff)
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#define SOCINFO_MINOR(ver) ((ver) & 0xffff)
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#define SMEM_SOCINFO_BUILD_ID_LENGTH 32
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/*
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* SMEM item id, used to acquire handles to respective
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* SMEM region.
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*/
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#define SMEM_HW_SW_BUILD_ID 137
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/* Socinfo SMEM item structure */
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struct socinfo {
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__le32 fmt;
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__le32 id;
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__le32 ver;
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char build_id[SMEM_SOCINFO_BUILD_ID_LENGTH];
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/* Version 2 */
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__le32 raw_id;
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__le32 raw_ver;
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/* Version 3 */
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__le32 hw_plat;
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/* Version 4 */
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__le32 plat_ver;
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/* Version 5 */
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__le32 accessory_chip;
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/* Version 6 */
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__le32 hw_plat_subtype;
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/* Version 7 */
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__le32 pmic_model;
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__le32 pmic_die_rev;
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/* Version 8 */
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__le32 pmic_model_1;
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__le32 pmic_die_rev_1;
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__le32 pmic_model_2;
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__le32 pmic_die_rev_2;
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/* Version 9 */
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__le32 foundry_id;
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/* Version 10 */
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__le32 serial_num;
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/* Version 11 */
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__le32 num_pmics;
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__le32 pmic_array_offset;
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/* Version 12 */
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__le32 chip_family;
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__le32 raw_device_family;
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__le32 raw_device_num;
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};
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struct qcom_socinfo {
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struct soc_device *soc_dev;
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struct soc_device_attribute attr;
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};
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struct soc_id {
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unsigned int id;
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const char *name;
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};
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static const struct soc_id soc_id[] = {
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{ 87, "MSM8960" },
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{ 109, "APQ8064" },
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{ 122, "MSM8660A" },
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{ 123, "MSM8260A" },
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{ 124, "APQ8060A" },
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{ 126, "MSM8974" },
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{ 130, "MPQ8064" },
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{ 138, "MSM8960AB" },
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{ 139, "APQ8060AB" },
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{ 140, "MSM8260AB" },
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{ 141, "MSM8660AB" },
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{ 178, "APQ8084" },
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{ 184, "APQ8074" },
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{ 185, "MSM8274" },
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{ 186, "MSM8674" },
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{ 194, "MSM8974PRO" },
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{ 206, "MSM8916" },
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{ 208, "APQ8074-AA" },
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{ 209, "APQ8074-AB" },
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{ 210, "APQ8074PRO" },
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{ 211, "MSM8274-AA" },
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{ 212, "MSM8274-AB" },
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{ 213, "MSM8274PRO" },
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{ 214, "MSM8674-AA" },
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{ 215, "MSM8674-AB" },
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{ 216, "MSM8674PRO" },
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{ 217, "MSM8974-AA" },
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{ 218, "MSM8974-AB" },
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{ 246, "MSM8996" },
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{ 247, "APQ8016" },
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{ 248, "MSM8216" },
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{ 249, "MSM8116" },
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{ 250, "MSM8616" },
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{ 291, "APQ8096" },
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{ 305, "MSM8996SG" },
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{ 310, "MSM8996AU" },
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{ 311, "APQ8096AU" },
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{ 312, "APQ8096SG" },
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};
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static const char *socinfo_machine(struct device *dev, unsigned int id)
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{
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int idx;
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for (idx = 0; idx < ARRAY_SIZE(soc_id); idx++) {
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if (soc_id[idx].id == id)
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return soc_id[idx].name;
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}
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return NULL;
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}
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static int qcom_socinfo_probe(struct platform_device *pdev)
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{
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struct qcom_socinfo *qs;
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struct socinfo *info;
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size_t item_size;
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info = qcom_smem_get(QCOM_SMEM_HOST_ANY, SMEM_HW_SW_BUILD_ID,
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&item_size);
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if (IS_ERR(info)) {
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dev_err(&pdev->dev, "Couldn't find socinfo\n");
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return PTR_ERR(info);
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}
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qs = devm_kzalloc(&pdev->dev, sizeof(*qs), GFP_KERNEL);
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if (!qs)
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return -ENOMEM;
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qs->attr.family = "Snapdragon";
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qs->attr.machine = socinfo_machine(&pdev->dev,
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le32_to_cpu(info->id));
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qs->attr.revision = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%u.%u",
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SOCINFO_MAJOR(le32_to_cpu(info->ver)),
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SOCINFO_MINOR(le32_to_cpu(info->ver)));
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if (offsetof(struct socinfo, serial_num) <= item_size)
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qs->attr.serial_number = devm_kasprintf(&pdev->dev, GFP_KERNEL,
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"%u",
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le32_to_cpu(info->serial_num));
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qs->soc_dev = soc_device_register(&qs->attr);
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if (IS_ERR(qs->soc_dev))
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return PTR_ERR(qs->soc_dev);
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/* Feed the soc specific unique data into entropy pool */
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add_device_randomness(info, item_size);
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platform_set_drvdata(pdev, qs->soc_dev);
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return 0;
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}
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static int qcom_socinfo_remove(struct platform_device *pdev)
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{
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struct qcom_socinfo *qs = platform_get_drvdata(pdev);
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soc_device_unregister(qs->soc_dev);
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return 0;
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}
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static struct platform_driver qcom_socinfo_driver = {
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.probe = qcom_socinfo_probe,
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.remove = qcom_socinfo_remove,
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.driver = {
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.name = "qcom-socinfo",
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},
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};
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module_platform_driver(qcom_socinfo_driver);
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MODULE_DESCRIPTION("Qualcomm SoCinfo driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:qcom-socinfo");
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