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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 | /* * 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); } |