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1/*
2 * Copyright (C) 2012 Russell King
3 * Rewritten from the dovefb driver, and Armada510 manuals.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9#include <linux/ctype.h>
10#include <linux/debugfs.h>
11#include <linux/module.h>
12#include <linux/seq_file.h>
13#include <drm/drmP.h>
14#include "armada_crtc.h"
15#include "armada_drm.h"
16
17static int armada_debugfs_gem_linear_show(struct seq_file *m, void *data)
18{
19 struct drm_info_node *node = m->private;
20 struct drm_device *dev = node->minor->dev;
21 struct armada_private *priv = dev->dev_private;
22 int ret;
23
24 mutex_lock(&priv->linear_lock);
25 ret = drm_mm_dump_table(m, &priv->linear);
26 mutex_unlock(&priv->linear_lock);
27
28 return ret;
29}
30
31static int armada_debugfs_reg_show(struct seq_file *m, void *data)
32{
33 struct drm_device *dev = m->private;
34 struct armada_private *priv = dev->dev_private;
35 int n, i;
36
37 if (priv) {
38 for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
39 struct armada_crtc *dcrtc = priv->dcrtc[n];
40 if (!dcrtc)
41 continue;
42
43 for (i = 0x84; i <= 0x1c4; i += 4) {
44 uint32_t v = readl_relaxed(dcrtc->base + i);
45 seq_printf(m, "%u: 0x%04x: 0x%08x\n", n, i, v);
46 }
47 }
48 }
49
50 return 0;
51}
52
53static int armada_debugfs_reg_r_open(struct inode *inode, struct file *file)
54{
55 return single_open(file, armada_debugfs_reg_show, inode->i_private);
56}
57
58static const struct file_operations fops_reg_r = {
59 .owner = THIS_MODULE,
60 .open = armada_debugfs_reg_r_open,
61 .read = seq_read,
62 .llseek = seq_lseek,
63 .release = single_release,
64};
65
66static int armada_debugfs_write(struct file *file, const char __user *ptr,
67 size_t len, loff_t *off)
68{
69 struct drm_device *dev = file->private_data;
70 struct armada_private *priv = dev->dev_private;
71 struct armada_crtc *dcrtc = priv->dcrtc[0];
72 char buf[32], *p;
73 uint32_t reg, val;
74 int ret;
75
76 if (*off != 0)
77 return 0;
78
79 if (len > sizeof(buf) - 1)
80 len = sizeof(buf) - 1;
81
82 ret = strncpy_from_user(buf, ptr, len);
83 if (ret < 0)
84 return ret;
85 buf[len] = '\0';
86
87 reg = simple_strtoul(buf, &p, 16);
88 if (!isspace(*p))
89 return -EINVAL;
90 val = simple_strtoul(p + 1, NULL, 16);
91
92 if (reg >= 0x84 && reg <= 0x1c4)
93 writel(val, dcrtc->base + reg);
94
95 return len;
96}
97
98static const struct file_operations fops_reg_w = {
99 .owner = THIS_MODULE,
100 .open = simple_open,
101 .write = armada_debugfs_write,
102 .llseek = noop_llseek,
103};
104
105static struct drm_info_list armada_debugfs_list[] = {
106 { "gem_linear", armada_debugfs_gem_linear_show, 0 },
107};
108#define ARMADA_DEBUGFS_ENTRIES ARRAY_SIZE(armada_debugfs_list)
109
110static int drm_add_fake_info_node(struct drm_minor *minor, struct dentry *ent,
111 const void *key)
112{
113 struct drm_info_node *node;
114
115 node = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
116 if (node == NULL) {
117 debugfs_remove(ent);
118 return -ENOMEM;
119 }
120
121 node->minor = minor;
122 node->dent = ent;
123 node->info_ent = (void *) key;
124
125 mutex_lock(&minor->debugfs_lock);
126 list_add(&node->list, &minor->debugfs_list);
127 mutex_unlock(&minor->debugfs_lock);
128
129 return 0;
130}
131
132static int armada_debugfs_create(struct dentry *root, struct drm_minor *minor,
133 const char *name, umode_t mode, const struct file_operations *fops)
134{
135 struct dentry *de;
136
137 de = debugfs_create_file(name, mode, root, minor->dev, fops);
138
139 return drm_add_fake_info_node(minor, de, fops);
140}
141
142int armada_drm_debugfs_init(struct drm_minor *minor)
143{
144 int ret;
145
146 ret = drm_debugfs_create_files(armada_debugfs_list,
147 ARMADA_DEBUGFS_ENTRIES,
148 minor->debugfs_root, minor);
149 if (ret)
150 return ret;
151
152 ret = armada_debugfs_create(minor->debugfs_root, minor,
153 "reg", S_IFREG | S_IRUSR, &fops_reg_r);
154 if (ret)
155 goto err_1;
156
157 ret = armada_debugfs_create(minor->debugfs_root, minor,
158 "reg_wr", S_IFREG | S_IWUSR, &fops_reg_w);
159 if (ret)
160 goto err_2;
161 return ret;
162
163 err_2:
164 drm_debugfs_remove_files((struct drm_info_list *)&fops_reg_r, 1, minor);
165 err_1:
166 drm_debugfs_remove_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
167 minor);
168 return ret;
169}
170
171void armada_drm_debugfs_cleanup(struct drm_minor *minor)
172{
173 drm_debugfs_remove_files((struct drm_info_list *)&fops_reg_w, 1, minor);
174 drm_debugfs_remove_files((struct drm_info_list *)&fops_reg_r, 1, minor);
175 drm_debugfs_remove_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
176 minor);
177}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Russell King
4 * Rewritten from the dovefb driver, and Armada510 manuals.
5 */
6
7#include <linux/ctype.h>
8#include <linux/module.h>
9#include <linux/seq_file.h>
10#include <linux/uaccess.h>
11
12#include <drm/drm_debugfs.h>
13#include <drm/drm_file.h>
14
15#include "armada_crtc.h"
16#include "armada_drm.h"
17
18static int armada_debugfs_gem_linear_show(struct seq_file *m, void *data)
19{
20 struct drm_info_node *node = m->private;
21 struct drm_device *dev = node->minor->dev;
22 struct armada_private *priv = drm_to_armada_dev(dev);
23 struct drm_printer p = drm_seq_file_printer(m);
24
25 mutex_lock(&priv->linear_lock);
26 drm_mm_print(&priv->linear, &p);
27 mutex_unlock(&priv->linear_lock);
28
29 return 0;
30}
31
32static int armada_debugfs_crtc_reg_show(struct seq_file *m, void *data)
33{
34 struct armada_crtc *dcrtc = m->private;
35 int i;
36
37 for (i = 0x84; i <= 0x1c4; i += 4) {
38 u32 v = readl_relaxed(dcrtc->base + i);
39 seq_printf(m, "0x%04x: 0x%08x\n", i, v);
40 }
41
42 return 0;
43}
44
45static int armada_debugfs_crtc_reg_open(struct inode *inode, struct file *file)
46{
47 return single_open(file, armada_debugfs_crtc_reg_show,
48 inode->i_private);
49}
50
51static int armada_debugfs_crtc_reg_write(struct file *file,
52 const char __user *ptr, size_t len, loff_t *off)
53{
54 struct armada_crtc *dcrtc;
55 unsigned long reg, mask, val;
56 char buf[32];
57 int ret;
58 u32 v;
59
60 if (*off != 0)
61 return 0;
62
63 if (len > sizeof(buf) - 1)
64 len = sizeof(buf) - 1;
65
66 ret = strncpy_from_user(buf, ptr, len);
67 if (ret < 0)
68 return ret;
69 buf[len] = '\0';
70
71 if (sscanf(buf, "%lx %lx %lx", ®, &mask, &val) != 3)
72 return -EINVAL;
73 if (reg < 0x84 || reg > 0x1c4 || reg & 3)
74 return -ERANGE;
75
76 dcrtc = ((struct seq_file *)file->private_data)->private;
77 v = readl(dcrtc->base + reg);
78 v &= ~mask;
79 v |= val & mask;
80 writel(v, dcrtc->base + reg);
81
82 return len;
83}
84
85static const struct file_operations armada_debugfs_crtc_reg_fops = {
86 .owner = THIS_MODULE,
87 .open = armada_debugfs_crtc_reg_open,
88 .read = seq_read,
89 .write = armada_debugfs_crtc_reg_write,
90 .llseek = seq_lseek,
91 .release = single_release,
92};
93
94void armada_drm_crtc_debugfs_init(struct armada_crtc *dcrtc)
95{
96 debugfs_create_file("armada-regs", 0600, dcrtc->crtc.debugfs_entry,
97 dcrtc, &armada_debugfs_crtc_reg_fops);
98}
99
100static struct drm_info_list armada_debugfs_list[] = {
101 { "gem_linear", armada_debugfs_gem_linear_show, 0 },
102};
103#define ARMADA_DEBUGFS_ENTRIES ARRAY_SIZE(armada_debugfs_list)
104
105int armada_drm_debugfs_init(struct drm_minor *minor)
106{
107 drm_debugfs_create_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
108 minor->debugfs_root, minor);
109
110 return 0;
111}