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 | |
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(f: m); |
24 | |
25 | mutex_lock(&priv->linear_lock); |
26 | drm_mm_print(mm: &priv->linear, p: &p); |
27 | mutex_unlock(lock: &priv->linear_lock); |
28 | |
29 | return 0; |
30 | } |
31 | |
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, fmt: "0x%04x: 0x%08x\n" , i, v); |
40 | } |
41 | |
42 | return 0; |
43 | } |
44 | |
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 | |
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(dst: buf, src: ptr, count: 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(addr: dcrtc->base + reg); |
78 | v &= ~mask; |
79 | v |= val & mask; |
80 | writel(val: v, addr: 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 | |
94 | void armada_drm_crtc_debugfs_init(struct armada_crtc *dcrtc) |
95 | { |
96 | debugfs_create_file(name: "armada-regs" , mode: 0600, parent: dcrtc->crtc.debugfs_entry, |
97 | data: dcrtc, fops: &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 | |
105 | int armada_drm_debugfs_init(struct drm_minor *minor) |
106 | { |
107 | drm_debugfs_create_files(files: armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES, |
108 | root: minor->debugfs_root, minor); |
109 | |
110 | return 0; |
111 | } |
112 | |