// SPDX-License-Identifier: GPL-2.0-only/* * Copyright (C) 2012 Russell King *  Rewritten from the dovefb driver, and Armada510 manuals. */ #include <linux/ctype.h>#include <linux/debugfs.h>#include <linux/module.h>#include <linux/seq_file.h>#include <linux/uaccess.h> #include <drm/drm_debugfs.h>#include <drm/drm_file.h>#include <drm/drm_print.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 = drm_to_armada_dev(dev);	struct drm_printer p = drm_seq_file_printer(m); 	mutex_lock(&priv->linear_lock);	drm_mm_print(&priv->linear, &p);	mutex_unlock(&priv->linear_lock); 	return 0;} static int armada_debugfs_crtc_reg_show(struct seq_file *m, void *data){	struct armada_crtc *dcrtc = m->private;	int i; 	for (i = 0x84; i <= 0x1c4; i += 4) {		u32 v = readl_relaxed(dcrtc->base + i);		seq_printf(m, "0x%04x: 0x%08x\n", i, v);	} 	return 0;} static int armada_debugfs_crtc_reg_open(struct inode *inode, struct file *file){	return single_open(file, armada_debugfs_crtc_reg_show,			   inode->i_private);} static int armada_debugfs_crtc_reg_write(struct file *file,	const char __user *ptr, size_t len, loff_t *off){	struct armada_crtc *dcrtc;	unsigned long reg, mask, val;	char buf[32];	int ret;	u32 v; 	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'; 	if (sscanf(buf, "%lx %lx %lx", &reg, &mask, &val) != 3)		return -EINVAL;	if (reg < 0x84 || reg > 0x1c4 || reg & 3)		return -ERANGE; 	dcrtc = ((struct seq_file *)file->private_data)->private;	v = readl(dcrtc->base + reg);	v &= ~mask;	v |= val & mask;	writel(v, dcrtc->base + reg); 	return len;} static const struct file_operations armada_debugfs_crtc_reg_fops = {	.owner = THIS_MODULE,	.open = armada_debugfs_crtc_reg_open,	.read = seq_read,	.write = armada_debugfs_crtc_reg_write,	.llseek = seq_lseek,	.release = single_release,}; void armada_drm_crtc_debugfs_init(struct armada_crtc *dcrtc){	debugfs_create_file("armada-regs", 0600, dcrtc->crtc.debugfs_entry,			    dcrtc, &armada_debugfs_crtc_reg_fops);} 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) int armada_drm_debugfs_init(struct drm_minor *minor){	drm_debugfs_create_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,				 minor->debugfs_root, minor); 	return 0;}