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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2012 Russell King
* Rewritten from the dovefb driver, and Armada510 manuals.
*/
#include <linux/ctype.h>
#include <linux/debugfs.h>
#include <linux/module.h>
#include <linux/seq_file.h>
#include <drm/drmP.h>
#include "armada_crtc.h"
#include "armada_drm.h"
static int armada_debugfs_gem_linear_show(struct seq_file *m, void *data)
{
struct drm_info_node *node = m->private;
struct drm_device *dev = node->minor->dev;
struct armada_private *priv = dev->dev_private;
struct drm_printer p = drm_seq_file_printer(m);
mutex_lock(&priv->linear_lock);
drm_mm_print(&priv->linear, &p);
mutex_unlock(&priv->linear_lock);
return 0;
}
static int armada_debugfs_crtc_reg_show(struct seq_file *m, void *data)
{
struct armada_crtc *dcrtc = m->private;
int i;
for (i = 0x84; i <= 0x1c4; i += 4) {
u32 v = readl_relaxed(dcrtc->base + i);
seq_printf(m, "0x%04x: 0x%08x\n", i, v);
}
return 0;
}
static int armada_debugfs_crtc_reg_open(struct inode *inode, struct file *file)
{
return single_open(file, armada_debugfs_crtc_reg_show,
inode->i_private);
}
static int armada_debugfs_crtc_reg_write(struct file *file,
const char __user *ptr, size_t len, loff_t *off)
{
struct armada_crtc *dcrtc;
unsigned long reg, mask, val;
char buf[32];
int ret;
u32 v;
if (*off != 0)
return 0;
if (len > sizeof(buf) - 1)
len = sizeof(buf) - 1;
ret = strncpy_from_user(buf, ptr, len);
if (ret < 0)
return ret;
buf[len] = '\0';
if (sscanf(buf, "%lx %lx %lx", ®, &mask, &val) != 3)
return -EINVAL;
if (reg < 0x84 || reg > 0x1c4 || reg & 3)
return -ERANGE;
dcrtc = ((struct seq_file *)file->private_data)->private;
v = readl(dcrtc->base + reg);
v &= ~mask;
v |= val & mask;
writel(v, dcrtc->base + reg);
return len;
}
static const struct file_operations armada_debugfs_crtc_reg_fops = {
.owner = THIS_MODULE,
.open = armada_debugfs_crtc_reg_open,
.read = seq_read,
.write = armada_debugfs_crtc_reg_write,
.llseek = seq_lseek,
.release = single_release,
};
void armada_drm_crtc_debugfs_init(struct armada_crtc *dcrtc)
{
debugfs_create_file("armada-regs", 0600, dcrtc->crtc.debugfs_entry,
dcrtc, &armada_debugfs_crtc_reg_fops);
}
static struct drm_info_list armada_debugfs_list[] = {
{ "gem_linear", armada_debugfs_gem_linear_show, 0 },
};
#define ARMADA_DEBUGFS_ENTRIES ARRAY_SIZE(armada_debugfs_list)
int armada_drm_debugfs_init(struct drm_minor *minor)
{
drm_debugfs_create_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
minor->debugfs_root, minor);
return 0;
}
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