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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2012 Russell King4 * Rewritten from the dovefb driver, and Armada510 manuals.5 */6 7#include <linux/ctype.h>8#include <linux/debugfs.h>9#include <linux/module.h>10#include <linux/seq_file.h>11#include <linux/uaccess.h>12 13#include <drm/drm_debugfs.h>14#include <drm/drm_file.h>15 16#include "armada_crtc.h"17#include "armada_drm.h"18 19static int armada_debugfs_gem_linear_show(struct seq_file *m, void *data)20{21 struct drm_info_node *node = m->private;22 struct drm_device *dev = node->minor->dev;23 struct armada_private *priv = drm_to_armada_dev(dev);24 struct drm_printer p = drm_seq_file_printer(m);25 26 mutex_lock(&priv->linear_lock);27 drm_mm_print(&priv->linear, &p);28 mutex_unlock(&priv->linear_lock);29 30 return 0;31}32 33static int armada_debugfs_crtc_reg_show(struct seq_file *m, void *data)34{35 struct armada_crtc *dcrtc = m->private;36 int i;37 38 for (i = 0x84; i <= 0x1c4; i += 4) {39 u32 v = readl_relaxed(dcrtc->base + i);40 seq_printf(m, "0x%04x: 0x%08x\n", i, v);41 }42 43 return 0;44}45 46static int armada_debugfs_crtc_reg_open(struct inode *inode, struct file *file)47{48 return single_open(file, armada_debugfs_crtc_reg_show,49 inode->i_private);50}51 52static int armada_debugfs_crtc_reg_write(struct file *file,53 const char __user *ptr, size_t len, loff_t *off)54{55 struct armada_crtc *dcrtc;56 unsigned long reg, mask, val;57 char buf[32];58 int ret;59 u32 v;60 61 if (*off != 0)62 return 0;63 64 if (len > sizeof(buf) - 1)65 len = sizeof(buf) - 1;66 67 ret = strncpy_from_user(buf, ptr, len);68 if (ret < 0)69 return ret;70 buf[len] = '\0';71 72 if (sscanf(buf, "%lx %lx %lx", ®, &mask, &val) != 3)73 return -EINVAL;74 if (reg < 0x84 || reg > 0x1c4 || reg & 3)75 return -ERANGE;76 77 dcrtc = ((struct seq_file *)file->private_data)->private;78 v = readl(dcrtc->base + reg);79 v &= ~mask;80 v |= val & mask;81 writel(v, dcrtc->base + reg);82 83 return len;84}85 86static const struct file_operations armada_debugfs_crtc_reg_fops = {87 .owner = THIS_MODULE,88 .open = armada_debugfs_crtc_reg_open,89 .read = seq_read,90 .write = armada_debugfs_crtc_reg_write,91 .llseek = seq_lseek,92 .release = single_release,93};94 95void armada_drm_crtc_debugfs_init(struct armada_crtc *dcrtc)96{97 debugfs_create_file("armada-regs", 0600, dcrtc->crtc.debugfs_entry,98 dcrtc, &armada_debugfs_crtc_reg_fops);99}100 101static struct drm_info_list armada_debugfs_list[] = {102 { "gem_linear", armada_debugfs_gem_linear_show, 0 },103};104#define ARMADA_DEBUGFS_ENTRIES ARRAY_SIZE(armada_debugfs_list)105 106int armada_drm_debugfs_init(struct drm_minor *minor)107{108 drm_debugfs_create_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,109 minor->debugfs_root, minor);110 111 return 0;112}113