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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(&dev->struct_mutex);
- ret = drm_mm_dump_table(m, &priv->linear);
- mutex_unlock(&dev->struct_mutex);
- 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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