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a01851131c
Add driver for common utility API for firmware class and dumping the inventory for all firmware. Bug 3583607 Change-Id: I259bc7f80b8842cea090f67b067f63e5f85cb79c Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2708890 GVS: Gerrit_Virtual_Submit
113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2022, NVIDIA CORPORATION, All rights reserved.
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/slab.h>
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#include <linux/of_platform.h>
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#include <linux/tegra-firmwares.h>
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#include <linux/cpu.h>
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#include <asm/cpu.h>
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#if IS_ENABLED(CONFIG_TRUSTY)
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#include <linux/trusty/trusty.h>
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static ssize_t tegrafw_read_trusty(struct device *dev,
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char *data, size_t size)
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{
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const struct of_device_id trusty_of_match[] = {
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{.compatible = "android,trusty-smc-v1", },
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{},
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};
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struct device_node *dn;
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struct platform_device *pdev;
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for_each_matching_node(dn, trusty_of_match) {
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pdev = of_find_device_by_node(dn);
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if (pdev == NULL)
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continue;
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return snprintf(data, size, "%s",
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trusty_version_str_get(&pdev->dev));
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}
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snprintf(data, size, "NULL");
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return 0;
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}
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#endif
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/* TBD: cpu_data is define in arch/arm64/kernel/cpuinfo.c
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* It is not exported and hence defining locally for the
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* build success.
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* Denver FW need to be deprecated.
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*/
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DEFINE_PER_CPU(struct cpuinfo_arm64, cpu_data);
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static ssize_t tegrafw_read_denver(struct device *dev,
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char *version, size_t size)
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{
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char *v = version;
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int i;
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size_t printed = 0;
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for_each_online_cpu(i) {
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struct cpuinfo_arm64 *cpuinfo = &per_cpu(cpu_data, i);
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u32 midr = cpuinfo->reg_midr;
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u32 aidr;
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if (MIDR_IMPLEMENTOR(midr) == ARM_CPU_IMP_NVIDIA) {
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asm volatile("mrs %0, AIDR_EL1" : "=r" (aidr) : );
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printed = snprintf(v, size, "CPU%d: %u(0x%x) ",
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i, aidr, aidr);
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size -= printed;
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v += printed;
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}
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}
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return v - version;
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}
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#define FIRMWARES_SIZE 10
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static struct device *firmwares[FIRMWARES_SIZE];
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#define check_out_of_bounds(dev, err) \
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if ((dev) - firmwares >= ARRAY_SIZE(firmwares)) { \
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pr_err("Cannot register 'legacy' firmware info: increase " \
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"firmwares array size"); \
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return (err); \
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}
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static int __init tegra_firmwares_init(void)
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{
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struct device **dev = firmwares;
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char *versions[] = { "mb1", "mb2", "mb1-bct", "qb", "osl" };
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int v;
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check_out_of_bounds(dev, 0);
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*dev++ = tegrafw_register("MTS", TFW_NORMAL, tegrafw_read_denver, NULL);
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#if IS_ENABLED(CONFIG_TRUSTY)
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check_out_of_bounds(dev, 0);
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*dev++ = tegrafw_register("trusty", TFW_DONT_CACHE,
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tegrafw_read_trusty, NULL);
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#endif
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for (v = 0; v < ARRAY_SIZE(versions); v++) {
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check_out_of_bounds(dev, 0);
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*dev++ = tegrafw_register_dt_string(versions[v],
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"/tegra-firmwares", versions[v]);
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}
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return 0;
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}
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static void __exit tegra_firmwares_exit(void)
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{
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struct device **dev = firmwares;
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while (dev - firmwares < ARRAY_SIZE(firmwares))
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tegrafw_unregister(*dev++);
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}
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module_init(tegra_firmwares_init);
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module_exit(tegra_firmwares_exit);
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MODULE_DESCRIPTION("Firmware info drivers");
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MODULE_AUTHOR("dmitry pervushin <dpervushin@nvidia.com>");
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MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
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MODULE_LICENSE("GPL v2");
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