mirror of
https://github.com/hardkernel/kernel_common_drivers.git
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qinglin.li
7c6316bebd
PD#SWPL-70486 Problem: use common tag in driver when printf Solution: set common pr_fmt in driver Verify: s4d Signed-off-by: qinglin.li <qinglin.li@amlogic.com> Change-Id: Ieee271d289e4d2f81258875d36288046b996a5d2
96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
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/*
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* Copyright (c) 2019 Amlogic, Inc. All rights reserved.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/amlogic/cpu_version.h>
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#include <linux/printk.h>
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#include <linux/string.h>
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#include <linux/of_address.h>
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#include <linux/io.h>
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#include <linux/regmap.h>
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#include <linux/mfd/syscon.h>
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#define AO_SEC_SD_CFG8 0xe0
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#define AO_SEC_SOCINFO_OFFSET AO_SEC_SD_CFG8
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static unsigned char cpu_version[MESON_CPU_VERSION_LVL_MAX + 1];
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static int init_done;
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static int cpu_id_from_media;
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int get_cpu_type_from_media(void)
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{
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return cpu_id_from_media;
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}
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EXPORT_SYMBOL(get_cpu_type_from_media);
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void set_cpu_type_from_media(int cpu_id)
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{
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if (cpu_id <= 0) {
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pr_err("wrong cpu id from media driver 0x%x.\n", cpu_id);
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return;
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}
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cpu_id_from_media = cpu_id;
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}
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EXPORT_SYMBOL(set_cpu_type_from_media);
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unsigned char get_meson_cpu_version(int level)
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{
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if (!init_done) {
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pr_err("too early call %s\n", __func__);
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dump_stack();
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return -1;
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}
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if (level >= 0 && level <= MESON_CPU_VERSION_LVL_MAX)
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return cpu_version[level];
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return 0;
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}
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EXPORT_SYMBOL(get_meson_cpu_version);
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int __init meson_cpu_version_init(void)
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{
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struct device_node *np;
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unsigned int socinfo;
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struct regmap *regmap;
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int ret;
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/* look up for chipid node */
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np = of_find_compatible_node(NULL, NULL, "amlogic,meson-gx-ao-secure");
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if (!np)
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return -ENODEV;
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/* node should be a syscon */
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regmap = syscon_node_to_regmap(np);
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of_node_put(np);
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if (IS_ERR(regmap)) {
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pr_err("%s: failed to get regmap\n", __func__);
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return -ENODEV;
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}
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ret = regmap_read(regmap, AO_SEC_SOCINFO_OFFSET, &socinfo);
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if (ret < 0)
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return ret;
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if (!socinfo) {
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pr_err("%s: invalid chipid value\n", __func__);
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return -EINVAL;
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}
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cpu_version[MESON_CPU_VERSION_LVL_MAJOR] = (socinfo >> 24) & 0xff;
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cpu_version[MESON_CPU_VERSION_LVL_MINOR] = (socinfo >> 8) & 0xff;
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cpu_version[MESON_CPU_VERSION_LVL_PACK] = (socinfo >> 16) & 0xff;
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cpu_version[MESON_CPU_VERSION_LVL_MISC] = socinfo & 0xff;
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pr_info("chip version = %X:%X - %X:%X\n",
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cpu_version[MESON_CPU_VERSION_LVL_MAJOR],
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cpu_version[MESON_CPU_VERSION_LVL_MINOR],
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cpu_version[MESON_CPU_VERSION_LVL_PACK],
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cpu_version[MESON_CPU_VERSION_LVL_MISC]
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);
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init_done = 1;
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return 0;
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}
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