80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
/*
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* Copyright (c) 2016-2019, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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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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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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if (MIDR_IMPLEMENTOR(midr) == ARM_CPU_IMP_NVIDIA) {
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printed = snprintf(v, size, "CPU%d: %u(0x%x) ",
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i, cpuinfo->reg_aidr, cpuinfo->reg_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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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_LICENSE("GPL");
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MODULE_AUTHOR("dmitry pervushin <dpervushin@nvidia.com>");
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