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/* Copyright (c) 2013-2014,2016,2018, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/cpu.h>
#include <linux/sched.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/export.h>
#include <linux/types.h>
#include <soc/qcom/boot_stats.h>
static void __iomem *mpm_counter_base;
static phys_addr_t mpm_counter_pa;
static uint32_t mpm_counter_freq;
struct boot_stats __iomem *boot_stats;
static int mpm_parse_dt(void)
{
struct device_node *np;
const __be32 *addrp;
u32 freq;
np = of_find_compatible_node(NULL, NULL, "qcom,msm-imem-boot_stats");
if (!np) {
pr_err("can't find qcom,msm-imem node\n");
return -ENODEV;
}
boot_stats = of_iomap(np, 0);
if (!boot_stats) {
pr_err("boot_stats: Can't map imem\n");
return -ENODEV;
}
np = of_find_compatible_node(NULL, NULL, "qcom,mpm2-sleep-counter");
if (!np) {
pr_err("mpm_counter: can't find DT node\n");
return -ENODEV;
}
if (!of_property_read_u32(np, "clock-frequency", &freq))
mpm_counter_freq = freq;
else
return -ENODEV;
addrp = of_get_address(np, 0, NULL, NULL);
if (addrp) {
mpm_counter_base = of_iomap(np, 0);
if (!mpm_counter_base) {
pr_err("mpm_counter: cant map counter base\n");
return -ENODEV;
}
mpm_counter_pa = of_translate_address(np, addrp);
if (mpm_counter_pa == OF_BAD_ADDR) {
pr_err("mpm_counter: failed to get physical address\n");
return -ENODEV;
}
}
return 0;
}
static void print_boot_stats(void)
{
pr_info("KPI: Bootloader start count = %u\n",
readl_relaxed(&boot_stats->bootloader_start));
pr_info("KPI: Bootloader end count = %u\n",
readl_relaxed(&boot_stats->bootloader_end));
pr_info("KPI: Bootloader display count = %u\n",
readl_relaxed(&boot_stats->bootloader_display));
pr_info("KPI: Bootloader load kernel count = %u\n",
readl_relaxed(&boot_stats->bootloader_load_kernel));
pr_info("KPI: Kernel MPM timestamp = %u\n",
readl_relaxed(mpm_counter_base));
pr_info("KPI: Kernel MPM Clock frequency = %u\n",
mpm_counter_freq);
}
unsigned long long int msm_timer_get_sclk_ticks(void)
{
unsigned long long int t1, t2;
int loop_count = 10;
int loop_zero_count = 3;
int tmp = USEC_PER_SEC;
void __iomem *sclk_tick;
do_div(tmp, TIMER_KHZ);
tmp /= (loop_zero_count-1);
sclk_tick = mpm_counter_base;
if (!sclk_tick)
return -EINVAL;
while (loop_zero_count--) {
t1 = __raw_readl_no_log(sclk_tick);
do {
udelay(1);
t2 = t1;
t1 = __raw_readl_no_log(sclk_tick);
} while ((t2 != t1) && --loop_count);
if (!loop_count) {
pr_err("boot_stats: SCLK did not stabilize\n");
return 0;
}
if (t1)
break;
udelay(tmp);
}
if (!loop_zero_count) {
pr_err("boot_stats: SCLK reads zero\n");
return 0;
}
return t1;
}
phys_addr_t msm_timer_get_pa(void)
{
return mpm_counter_pa;
}
int boot_stats_init(void)
{
int ret;
ret = mpm_parse_dt();
if (ret < 0)
return -ENODEV;
print_boot_stats();
if (!(boot_marker_enabled()))
boot_stats_exit();
return 0;
}
int boot_stats_exit(void)
{
iounmap(boot_stats);
iounmap(mpm_counter_base);
return 0;
}
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