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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2021-2022, NVIDIA CORPORATION. All rights reserved
*/
#include <linux/clk.h>
#include <linux/cpufeature.h>
#include <linux/debugfs.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <soc/tegra/fuse.h>
#include <soc/tegra/tegra-cbb.h>
void tegra_cbb_print_err(struct seq_file *file, const char *fmt, ...)
{
struct va_format vaf;
va_list args;
va_start(args, fmt);
if (file) {
seq_vprintf(file, fmt, args);
} else {
vaf.fmt = fmt;
vaf.va = &args;
pr_crit("%pV", &vaf);
}
va_end(args);
}
void tegra_cbb_print_cache(struct seq_file *file, u32 cache)
{
const char *buff_str, *mod_str, *rd_str, *wr_str;
buff_str = (cache & BIT(0)) ? "Bufferable " : "";
mod_str = (cache & BIT(1)) ? "Modifiable " : "";
rd_str = (cache & BIT(2)) ? "Read-Allocate " : "";
wr_str = (cache & BIT(3)) ? "Write-Allocate" : "";
if (cache == 0x0)
buff_str = "Device Non-Bufferable";
tegra_cbb_print_err(file, "\t Cache\t\t\t: 0x%x -- %s%s%s%s\n",
cache, buff_str, mod_str, rd_str, wr_str);
}
void tegra_cbb_print_prot(struct seq_file *file, u32 prot)
{
const char *data_str, *secure_str, *priv_str;
data_str = (prot & 0x4) ? "Instruction" : "Data";
secure_str = (prot & 0x2) ? "Non-Secure" : "Secure";
priv_str = (prot & 0x1) ? "Privileged" : "Unprivileged";
tegra_cbb_print_err(file, "\t Protection\t\t: 0x%x -- %s, %s, %s Access\n",
prot, priv_str, secure_str, data_str);
}
static int tegra_cbb_err_show(struct seq_file *file, void *data)
{
struct tegra_cbb *cbb = file->private;
return cbb->ops->debugfs_show(cbb, file, data);
}
DEFINE_SHOW_ATTRIBUTE(tegra_cbb_err);
static int tegra_cbb_err_debugfs_init(struct tegra_cbb *cbb)
{
static struct dentry *root;
if (!root) {
root = debugfs_create_file("tegra_cbb_err", 0444, NULL, cbb, &tegra_cbb_err_fops);
if (IS_ERR_OR_NULL(root)) {
pr_err("%s(): could not create debugfs node\n", __func__);
return PTR_ERR(root);
}
}
return 0;
}
void tegra_cbb_stall_enable(struct tegra_cbb *cbb)
{
if (cbb->ops->stall_enable)
cbb->ops->stall_enable(cbb);
}
void tegra_cbb_fault_enable(struct tegra_cbb *cbb)
{
if (cbb->ops->fault_enable)
cbb->ops->fault_enable(cbb);
}
void tegra_cbb_error_clear(struct tegra_cbb *cbb)
{
if (cbb->ops->error_clear)
cbb->ops->error_clear(cbb);
}
u32 tegra_cbb_get_status(struct tegra_cbb *cbb)
{
if (cbb->ops->get_status)
return cbb->ops->get_status(cbb);
return 0;
}
int tegra_cbb_get_irq(struct platform_device *pdev, unsigned int *nonsec_irq,
unsigned int *sec_irq)
{
unsigned int index = 0;
int num_intr = 0, irq;
num_intr = platform_irq_count(pdev);
if (!num_intr)
return -EINVAL;
if (num_intr == 2) {
irq = platform_get_irq(pdev, index);
if (irq <= 0) {
dev_err(&pdev->dev, "failed to get non-secure IRQ: %d\n", irq);
return -ENOENT;
}
*nonsec_irq = irq;
index++;
}
irq = platform_get_irq(pdev, index);
if (irq <= 0) {
dev_err(&pdev->dev, "failed to get secure IRQ: %d\n", irq);
return -ENOENT;
}
*sec_irq = irq;
if (num_intr == 1)
dev_dbg(&pdev->dev, "secure IRQ: %u\n", *sec_irq);
if (num_intr == 2)
dev_dbg(&pdev->dev, "secure IRQ: %u, non-secure IRQ: %u\n", *sec_irq, *nonsec_irq);
return 0;
}
int tegra_cbb_register(struct tegra_cbb *cbb)
{
int ret;
if (IS_ENABLED(CONFIG_DEBUG_FS)) {
ret = tegra_cbb_err_debugfs_init(cbb);
if (ret) {
dev_err(cbb->dev, "failed to create debugfs\n");
return ret;
}
}
/* register interrupt handler for errors due to different initiators */
ret = cbb->ops->interrupt_enable(cbb);
if (ret < 0) {
dev_err(cbb->dev, "Failed to register CBB Interrupt ISR");
return ret;
}
cbb->ops->error_enable(cbb);
dsb(sy);
return 0;
}
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