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
armada_debugfs_gem_linear_show(struct seq_file * m,void * data)18 static 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
armada_debugfs_crtc_reg_show(struct seq_file * m,void * data)32 static 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
armada_debugfs_crtc_reg_open(struct inode * inode,struct file * file)45 static 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
armada_debugfs_crtc_reg_write(struct file * file,const char __user * ptr,size_t len,loff_t * off)51 static 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
85 static 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
armada_drm_crtc_debugfs_init(struct armada_crtc * dcrtc)94 void 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
100 static 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
armada_drm_debugfs_init(struct drm_minor * minor)105 int 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 }
112