Amlogic SoCs have a SoC information secure-monitor call for SoC type, package type, revision information and chipid. This patchs adds support for secure-monitor call decoding and exposing with the SoC bus infrastructure in addition to the previous SoC Information driver. Signed-off-by: Viacheslav Bocharov <adeep@xxxxxxxxx> --- drivers/soc/amlogic/Kconfig | 10 + drivers/soc/amlogic/Makefile | 1 + .../soc/amlogic/meson-gx-socinfo-internal.h | 14 +- drivers/soc/amlogic/meson-gx-socinfo-sm.c | 190 ++++++++++++++++++ 4 files changed, 211 insertions(+), 4 deletions(-) create mode 100644 drivers/soc/amlogic/meson-gx-socinfo-sm.c diff --git a/drivers/soc/amlogic/Kconfig b/drivers/soc/amlogic/Kconfig index d08e398bdad4..82fc77ca3b4b 100644 --- a/drivers/soc/amlogic/Kconfig +++ b/drivers/soc/amlogic/Kconfig @@ -26,6 +26,16 @@ config MESON_GX_SOCINFO Say yes to support decoding of Amlogic Meson GX SoC family information about the type, package and version. +config MESON_GX_SOCINFO_SM + bool "Amlogic Meson GX SoC Information driver via Secure Monitor" + depends on (ARM64 && ARCH_MESON || COMPILE_TEST) && MESON_SM=y + default ARCH_MESON && MESON_SM + select SOC_BUS + help + Say yes to support decoding of Amlogic Meson GX SoC family + information about the type, package and version via secure + monitor call. + config MESON_MX_SOCINFO bool "Amlogic Meson MX SoC Information driver" depends on (ARM && ARCH_MESON) || COMPILE_TEST diff --git a/drivers/soc/amlogic/Makefile b/drivers/soc/amlogic/Makefile index c25f835e6a26..45d9d6f5904c 100644 --- a/drivers/soc/amlogic/Makefile +++ b/drivers/soc/amlogic/Makefile @@ -2,4 +2,5 @@ obj-$(CONFIG_MESON_CANVAS) += meson-canvas.o obj-$(CONFIG_MESON_CLK_MEASURE) += meson-clk-measure.o obj-$(CONFIG_MESON_GX_SOCINFO) += meson-gx-socinfo.o +obj-$(CONFIG_MESON_GX_SOCINFO_SM) += meson-gx-socinfo-sm.o obj-$(CONFIG_MESON_MX_SOCINFO) += meson-mx-socinfo.o diff --git a/drivers/soc/amlogic/meson-gx-socinfo-internal.h b/drivers/soc/amlogic/meson-gx-socinfo-internal.h index 42cd57e67390..5559573c9024 100644 --- a/drivers/soc/amlogic/meson-gx-socinfo-internal.h +++ b/drivers/soc/amlogic/meson-gx-socinfo-internal.h @@ -33,10 +33,16 @@ union meson_cpu_id { u32 raw; }; -struct meson_sm_chip_id { - u32 version; - union meson_cpu_id cpu_id; - u8 serial[12]; +union meson_sm_chip_id { + struct { // cpu_id v2 + u32 version; + union meson_cpu_id cpu_id; + u8 serial[12]; + } v2; + struct { // raw + u32 version; + u8 buf[12 + sizeof(union meson_cpu_id)]; + } raw; }; static const struct meson_gx_soc_id { diff --git a/drivers/soc/amlogic/meson-gx-socinfo-sm.c b/drivers/soc/amlogic/meson-gx-socinfo-sm.c new file mode 100644 index 000000000000..e12f45cd8de2 --- /dev/null +++ b/drivers/soc/amlogic/meson-gx-socinfo-sm.c @@ -0,0 +1,190 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2017 BayLibre, SAS + * Copyright (c) 2024 JetHome + * Author: Neil Armstrong <neil.armstrong@xxxxxxxxxx> + * Author: Viacheslav Bocharov <adeep@xxxxxxxxx> + * + */ + +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/sys_soc.h> +#include <linux/regmap.h> +#include <linux/mfd/syscon.h> + +#include <linux/firmware/meson/meson_sm.h> + +#include "meson-gx-socinfo-internal.h" + +static char *socinfo_get_chipid(struct device *dev, struct meson_sm_firmware *fw, + union meson_cpu_id *socinfo) +{ + char *buf; + union meson_sm_chip_id *id_buf; + int ret; + + id_buf = kzalloc(sizeof(union meson_sm_chip_id)+1, GFP_KERNEL); + if (!id_buf) + return NULL; + + ret = meson_sm_call_read(fw, id_buf, sizeof(union meson_sm_chip_id), SM_GET_CHIP_ID, + 2, 0, 0, 0, 0); + if (ret < 0) { + kfree(id_buf); + return NULL; + } + dev_info(dev, "got sm version call %i\n", id_buf->raw.version); + + if (id_buf->raw.version != 2) { + + u8 tmp; + /** + * Legacy 12-byte chip ID read out, transform data + * to expected order format + */ + memmove((void *)&id_buf->v2.serial, (void *)&id_buf->raw.buf, 12); + for (int i = 0; i < 6; i++) { + tmp = id_buf->v2.serial[i]; + id_buf->v2.serial[i] = id_buf->v2.serial[11 - i]; + id_buf->v2.serial[11 - i] = tmp; + } + id_buf->v2.cpu_id.v2.major_id = socinfo->v1.major_id; + id_buf->v2.cpu_id.v2.pack_id = socinfo->v1.pack_id; + id_buf->v2.cpu_id.v2.chip_rev = socinfo->v1.chip_rev; + id_buf->v2.cpu_id.v2.reserved = socinfo->v1.reserved; + id_buf->v2.cpu_id.v2.layout_ver = socinfo->v1.layout_ver; + } else { + /** + * rewrite socinfo from regmap with value from secure monitor call + */ + socinfo->v1.major_id = id_buf->v2.cpu_id.v2.major_id; + socinfo->v1.pack_id = id_buf->v2.cpu_id.v2.pack_id; + socinfo->v1.chip_rev = id_buf->v2.cpu_id.v2.chip_rev; + socinfo->v1.reserved = id_buf->v2.cpu_id.v2.reserved; + socinfo->v1.layout_ver = id_buf->v2.cpu_id.v2.layout_ver; + } + + buf = devm_kasprintf(dev, GFP_KERNEL, "%4phN%12phN", &(id_buf->v2.cpu_id), + &(id_buf->v2.serial)); + + kfree(id_buf); + + return buf; +} + +static int meson_gx_socinfo_sm_probe(struct platform_device *pdev) +{ + struct soc_device_attribute *soc_dev_attr; + struct soc_device *soc_dev; + struct device_node *sm_np; + struct meson_sm_firmware *fw; + struct regmap *regmap; + union meson_cpu_id socinfo; + struct device *dev; + int ret; + + /* check if chip-id is available */ + if (!of_property_read_bool(pdev->dev.of_node, "amlogic,has-chip-id")) + return -ENODEV; + + /* node should be a syscon */ + regmap = syscon_node_to_regmap(pdev->dev.of_node); + if (IS_ERR(regmap)) + return dev_err_probe(&pdev->dev, PTR_ERR(regmap), "failed to get regmap\n"); + + sm_np = of_parse_phandle(pdev->dev.of_node, "secure-monitor", 0); + if (!sm_np) { + dev_err(&pdev->dev, "no secure-monitor node found\n"); + return -EINVAL; + } + + fw = meson_sm_get(sm_np); + of_node_put(sm_np); + if (!fw) { + dev_dbg(&pdev->dev, "secure-monitor device not ready, probe later\n"); + return -EPROBE_DEFER; + } + + ret = regmap_read(regmap, AO_SEC_SOCINFO_OFFSET, &socinfo.raw); + if (ret < 0) + return ret; + + if (!socinfo.raw) { + dev_err(&pdev->dev, "invalid regmap chipid value\n"); + return -EINVAL; + } + + soc_dev_attr = devm_kzalloc(&pdev->dev, sizeof(*soc_dev_attr), + GFP_KERNEL); + if (!soc_dev_attr) + return -ENOMEM; + + soc_dev_attr->serial_number = socinfo_get_chipid(&pdev->dev, fw, &socinfo); + + soc_dev_attr->family = "Amlogic Meson"; + soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%x:%x - %x:%x", + socinfo.v1.major_id, + socinfo.v1.chip_rev, + socinfo.v1.pack_id, + (socinfo.v1.reserved<<4) + socinfo.v1.layout_ver); + soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%s (%s)", + socinfo_v1_to_soc_id(socinfo), + socinfo_v1_to_package_id(socinfo)); + + soc_dev = soc_device_register(soc_dev_attr); + + + if (IS_ERR(soc_dev)) { + kfree(soc_dev_attr->revision); + kfree_const(soc_dev_attr->soc_id); + return PTR_ERR(soc_dev); + } + + dev = soc_device_to_device(soc_dev); + platform_set_drvdata(pdev, soc_dev); + + dev_info(dev, "Amlogic Meson %s Revision %x:%x (%x:%x) Detected (SM)\n", + soc_dev_attr->soc_id, + socinfo.v1.major_id, + socinfo.v1.chip_rev, + socinfo.v1.pack_id, + (socinfo.v1.reserved<<4) + socinfo.v1.layout_ver); + + return PTR_ERR_OR_ZERO(dev); +} + + +static int meson_gx_socinfo_sm_remove(struct platform_device *pdev) +{ + struct soc_device *soc_dev = platform_get_drvdata(pdev); + + soc_device_unregister(soc_dev); + return 0; +} + +static const struct of_device_id meson_gx_socinfo_match[] = { + { .compatible = "amlogic,meson-gx-ao-secure", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, meson_gx_socinfo_match); + +static struct platform_driver meson_gx_socinfo_driver = { + .probe = meson_gx_socinfo_sm_probe, + .remove = meson_gx_socinfo_sm_remove, + .driver = { + .name = "meson-gx-socinfo-sm", + .of_match_table = meson_gx_socinfo_match, + }, +}; + + +module_platform_driver(meson_gx_socinfo_driver); + +MODULE_AUTHOR("Viacheslav Bocharov <adeep@xxxxxxxxx>"); +MODULE_DESCRIPTION("Amlogic Meson GX SOC SM driver"); +MODULE_LICENSE("GPL"); -- 2.45.2