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/*
* Copyright (C) 2012 Russell King
* Rewritten from the dovefb driver, and Armada510 manuals.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#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;
int ret;
mutex_lock(&priv->linear_lock);
ret = drm_mm_dump_table(m, &priv->linear);
mutex_unlock(&priv->linear_lock);
return ret;
}
static int armada_debugfs_reg_show(struct seq_file *m, void *data)
{
struct drm_device *dev = m->private;
struct armada_private *priv = dev->dev_private;
int n, i;
if (priv) {
for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
struct armada_crtc *dcrtc = priv->dcrtc[n];
if (!dcrtc)
continue;
for (i = 0x84; i <= 0x1c4; i += 4) {
uint32_t v = readl_relaxed(dcrtc->base + i);
seq_printf(m, "%u: 0x%04x: 0x%08x\n", n, i, v);
}
}
}
return 0;
}
static int armada_debugfs_reg_r_open(struct inode *inode, struct file *file)
{
return single_open(file, armada_debugfs_reg_show, inode->i_private);
}
static const struct file_operations fops_reg_r = {
.owner = THIS_MODULE,
.open = armada_debugfs_reg_r_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int armada_debugfs_write(struct file *file, const char __user *ptr,
size_t len, loff_t *off)
{
struct drm_device *dev = file->private_data;
struct armada_private *priv = dev->dev_private;
struct armada_crtc *dcrtc = priv->dcrtc[0];
char buf[32], *p;
uint32_t reg, val;
int ret;
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';
reg = simple_strtoul(buf, &p, 16);
if (!isspace(*p))
return -EINVAL;
val = simple_strtoul(p + 1, NULL, 16);
if (reg >= 0x84 && reg <= 0x1c4)
writel(val, dcrtc->base + reg);
return len;
}
static const struct file_operations fops_reg_w = {
.owner = THIS_MODULE,
.open = simple_open,
.write = armada_debugfs_write,
.llseek = noop_llseek,
};
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)
static int drm_add_fake_info_node(struct drm_minor *minor, struct dentry *ent,
const void *key)
{
struct drm_info_node *node;
node = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
if (node == NULL) {
debugfs_remove(ent);
return -ENOMEM;
}
node->minor = minor;
node->dent = ent;
node->info_ent = (void *) key;
mutex_lock(&minor->debugfs_lock);
list_add(&node->list, &minor->debugfs_list);
mutex_unlock(&minor->debugfs_lock);
return 0;
}
static int armada_debugfs_create(struct dentry *root, struct drm_minor *minor,
const char *name, umode_t mode, const struct file_operations *fops)
{
struct dentry *de;
de = debugfs_create_file(name, mode, root, minor->dev, fops);
return drm_add_fake_info_node(minor, de, fops);
}
int armada_drm_debugfs_init(struct drm_minor *minor)
{
int ret;
ret = drm_debugfs_create_files(armada_debugfs_list,
ARMADA_DEBUGFS_ENTRIES,
minor->debugfs_root, minor);
if (ret)
return ret;
ret = armada_debugfs_create(minor->debugfs_root, minor,
"reg", S_IFREG | S_IRUSR, &fops_reg_r);
if (ret)
goto err_1;
ret = armada_debugfs_create(minor->debugfs_root, minor,
"reg_wr", S_IFREG | S_IWUSR, &fops_reg_w);
if (ret)
goto err_2;
return ret;
err_2:
drm_debugfs_remove_files((struct drm_info_list *)&fops_reg_r, 1, minor);
err_1:
drm_debugfs_remove_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
minor);
return ret;
}
void armada_drm_debugfs_cleanup(struct drm_minor *minor)
{
drm_debugfs_remove_files((struct drm_info_list *)&fops_reg_w, 1, minor);
drm_debugfs_remove_files((struct drm_info_list *)&fops_reg_r, 1, minor);
drm_debugfs_remove_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
minor);
}
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