1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
296f60e37SRussell King /*
396f60e37SRussell King * Copyright (C) 2012 Russell King
496f60e37SRussell King * Rewritten from the dovefb driver, and Armada510 manuals.
596f60e37SRussell King */
625e28ef2SSam Ravnborg
796f60e37SRussell King #include <linux/ctype.h>
896f60e37SRussell King #include <linux/module.h>
996f60e37SRussell King #include <linux/seq_file.h>
1025e28ef2SSam Ravnborg #include <linux/uaccess.h>
1125e28ef2SSam Ravnborg
1225e28ef2SSam Ravnborg #include <drm/drm_debugfs.h>
1325e28ef2SSam Ravnborg #include <drm/drm_file.h>
1425e28ef2SSam Ravnborg
1596f60e37SRussell King #include "armada_crtc.h"
1696f60e37SRussell King #include "armada_drm.h"
1796f60e37SRussell King
armada_debugfs_gem_linear_show(struct seq_file * m,void * data)1896f60e37SRussell King static int armada_debugfs_gem_linear_show(struct seq_file *m, void *data)
1996f60e37SRussell King {
2096f60e37SRussell King struct drm_info_node *node = m->private;
2196f60e37SRussell King struct drm_device *dev = node->minor->dev;
22dad75a52SDaniel Vetter struct armada_private *priv = drm_to_armada_dev(dev);
23b5c3714fSDaniel Vetter struct drm_printer p = drm_seq_file_printer(m);
2496f60e37SRussell King
250b8ebeacSDaniel Vetter mutex_lock(&priv->linear_lock);
26433e404fSChris Wilson drm_mm_print(&priv->linear, &p);
270b8ebeacSDaniel Vetter mutex_unlock(&priv->linear_lock);
2896f60e37SRussell King
29b5c3714fSDaniel Vetter return 0;
3096f60e37SRussell King }
3196f60e37SRussell King
armada_debugfs_crtc_reg_show(struct seq_file * m,void * data)3206734cb0SRussell King static int armada_debugfs_crtc_reg_show(struct seq_file *m, void *data)
3396f60e37SRussell King {
3406734cb0SRussell King struct armada_crtc *dcrtc = m->private;
3506734cb0SRussell King int i;
3696f60e37SRussell King
3796f60e37SRussell King for (i = 0x84; i <= 0x1c4; i += 4) {
3806734cb0SRussell King u32 v = readl_relaxed(dcrtc->base + i);
3906734cb0SRussell King seq_printf(m, "0x%04x: 0x%08x\n", i, v);
4096f60e37SRussell King }
4196f60e37SRussell King
4296f60e37SRussell King return 0;
4396f60e37SRussell King }
4496f60e37SRussell King
armada_debugfs_crtc_reg_open(struct inode * inode,struct file * file)4506734cb0SRussell King static int armada_debugfs_crtc_reg_open(struct inode *inode, struct file *file)
4696f60e37SRussell King {
4706734cb0SRussell King return single_open(file, armada_debugfs_crtc_reg_show,
4806734cb0SRussell King inode->i_private);
4996f60e37SRussell King }
5096f60e37SRussell King
armada_debugfs_crtc_reg_write(struct file * file,const char __user * ptr,size_t len,loff_t * off)5106734cb0SRussell King static int armada_debugfs_crtc_reg_write(struct file *file,
5206734cb0SRussell King const char __user *ptr, size_t len, loff_t *off)
5396f60e37SRussell King {
5406734cb0SRussell King struct armada_crtc *dcrtc;
5506734cb0SRussell King unsigned long reg, mask, val;
5606734cb0SRussell King char buf[32];
5796f60e37SRussell King int ret;
5806734cb0SRussell King u32 v;
5996f60e37SRussell King
6096f60e37SRussell King if (*off != 0)
6196f60e37SRussell King return 0;
6296f60e37SRussell King
6396f60e37SRussell King if (len > sizeof(buf) - 1)
6496f60e37SRussell King len = sizeof(buf) - 1;
6596f60e37SRussell King
6696f60e37SRussell King ret = strncpy_from_user(buf, ptr, len);
6796f60e37SRussell King if (ret < 0)
6896f60e37SRussell King return ret;
6996f60e37SRussell King buf[len] = '\0';
7096f60e37SRussell King
7106734cb0SRussell King if (sscanf(buf, "%lx %lx %lx", ®, &mask, &val) != 3)
7296f60e37SRussell King return -EINVAL;
7306734cb0SRussell King if (reg < 0x84 || reg > 0x1c4 || reg & 3)
7406734cb0SRussell King return -ERANGE;
7596f60e37SRussell King
7606734cb0SRussell King dcrtc = ((struct seq_file *)file->private_data)->private;
7706734cb0SRussell King v = readl(dcrtc->base + reg);
7806734cb0SRussell King v &= ~mask;
7906734cb0SRussell King v |= val & mask;
8006734cb0SRussell King writel(v, dcrtc->base + reg);
8196f60e37SRussell King
8296f60e37SRussell King return len;
8396f60e37SRussell King }
8496f60e37SRussell King
8506734cb0SRussell King static const struct file_operations armada_debugfs_crtc_reg_fops = {
8696f60e37SRussell King .owner = THIS_MODULE,
8706734cb0SRussell King .open = armada_debugfs_crtc_reg_open,
8806734cb0SRussell King .read = seq_read,
8906734cb0SRussell King .write = armada_debugfs_crtc_reg_write,
9006734cb0SRussell King .llseek = seq_lseek,
9106734cb0SRussell King .release = single_release,
9296f60e37SRussell King };
9396f60e37SRussell King
armada_drm_crtc_debugfs_init(struct armada_crtc * dcrtc)9406734cb0SRussell King void armada_drm_crtc_debugfs_init(struct armada_crtc *dcrtc)
9506734cb0SRussell King {
9606734cb0SRussell King debugfs_create_file("armada-regs", 0600, dcrtc->crtc.debugfs_entry,
9706734cb0SRussell King dcrtc, &armada_debugfs_crtc_reg_fops);
9806734cb0SRussell King }
9906734cb0SRussell King
10096f60e37SRussell King static struct drm_info_list armada_debugfs_list[] = {
10196f60e37SRussell King { "gem_linear", armada_debugfs_gem_linear_show, 0 },
10296f60e37SRussell King };
10396f60e37SRussell King #define ARMADA_DEBUGFS_ENTRIES ARRAY_SIZE(armada_debugfs_list)
10496f60e37SRussell King
armada_drm_debugfs_init(struct drm_minor * minor)10596f60e37SRussell King int armada_drm_debugfs_init(struct drm_minor *minor)
10696f60e37SRussell King {
10706734cb0SRussell King drm_debugfs_create_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
10896f60e37SRussell King minor->debugfs_root, minor);
10996f60e37SRussell King
110b516a6c9SNoralf Trønnes return 0;
11196f60e37SRussell King }
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