1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2012 Russell King 4 * Rewritten from the dovefb driver, and Armada510 manuals. 5 */ 6 7 #include <linux/ctype.h> 8 #include <linux/module.h> 9 #include <linux/seq_file.h> 10 #include <linux/uaccess.h> 11 12 #include <drm/drm_debugfs.h> 13 #include <drm/drm_file.h> 14 15 #include "armada_crtc.h" 16 #include "armada_drm.h" 17 18 static int armada_debugfs_gem_linear_show(struct seq_file *m, void *data) 19 { 20 struct drm_info_node *node = m->private; 21 struct drm_device *dev = node->minor->dev; 22 struct armada_private *priv = drm_to_armada_dev(dev); 23 struct drm_printer p = drm_seq_file_printer(m); 24 25 mutex_lock(&priv->linear_lock); 26 drm_mm_print(&priv->linear, &p); 27 mutex_unlock(&priv->linear_lock); 28 29 return 0; 30 } 31 32 static int armada_debugfs_crtc_reg_show(struct seq_file *m, void *data) 33 { 34 struct armada_crtc *dcrtc = m->private; 35 int i; 36 37 for (i = 0x84; i <= 0x1c4; i += 4) { 38 u32 v = readl_relaxed(dcrtc->base + i); 39 seq_printf(m, "0x%04x: 0x%08x\n", i, v); 40 } 41 42 return 0; 43 } 44 45 static int armada_debugfs_crtc_reg_open(struct inode *inode, struct file *file) 46 { 47 return single_open(file, armada_debugfs_crtc_reg_show, 48 inode->i_private); 49 } 50 51 static int armada_debugfs_crtc_reg_write(struct file *file, 52 const char __user *ptr, size_t len, loff_t *off) 53 { 54 struct armada_crtc *dcrtc; 55 unsigned long reg, mask, val; 56 char buf[32]; 57 int ret; 58 u32 v; 59 60 if (*off != 0) 61 return 0; 62 63 if (len > sizeof(buf) - 1) 64 len = sizeof(buf) - 1; 65 66 ret = strncpy_from_user(buf, ptr, len); 67 if (ret < 0) 68 return ret; 69 buf[len] = '\0'; 70 71 if (sscanf(buf, "%lx %lx %lx", ®, &mask, &val) != 3) 72 return -EINVAL; 73 if (reg < 0x84 || reg > 0x1c4 || reg & 3) 74 return -ERANGE; 75 76 dcrtc = ((struct seq_file *)file->private_data)->private; 77 v = readl(dcrtc->base + reg); 78 v &= ~mask; 79 v |= val & mask; 80 writel(v, dcrtc->base + reg); 81 82 return len; 83 } 84 85 static const struct file_operations armada_debugfs_crtc_reg_fops = { 86 .owner = THIS_MODULE, 87 .open = armada_debugfs_crtc_reg_open, 88 .read = seq_read, 89 .write = armada_debugfs_crtc_reg_write, 90 .llseek = seq_lseek, 91 .release = single_release, 92 }; 93 94 void armada_drm_crtc_debugfs_init(struct armada_crtc *dcrtc) 95 { 96 debugfs_create_file("armada-regs", 0600, dcrtc->crtc.debugfs_entry, 97 dcrtc, &armada_debugfs_crtc_reg_fops); 98 } 99 100 static struct drm_info_list armada_debugfs_list[] = { 101 { "gem_linear", armada_debugfs_gem_linear_show, 0 }, 102 }; 103 #define ARMADA_DEBUGFS_ENTRIES ARRAY_SIZE(armada_debugfs_list) 104 105 int armada_drm_debugfs_init(struct drm_minor *minor) 106 { 107 drm_debugfs_create_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES, 108 minor->debugfs_root, minor); 109 110 return 0; 111 } 112