1 /* 2 * Copyright (C) 2012 Russell King 3 * Rewritten from the dovefb driver, and Armada510 manuals. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 */ 9 #include <linux/ctype.h> 10 #include <linux/debugfs.h> 11 #include <linux/module.h> 12 #include <linux/seq_file.h> 13 #include <drm/drmP.h> 14 #include "armada_crtc.h" 15 #include "armada_drm.h" 16 17 static int armada_debugfs_gem_linear_show(struct seq_file *m, void *data) 18 { 19 struct drm_info_node *node = m->private; 20 struct drm_device *dev = node->minor->dev; 21 struct armada_private *priv = dev->dev_private; 22 struct drm_printer p = drm_seq_file_printer(m); 23 24 mutex_lock(&priv->linear_lock); 25 drm_mm_print(&priv->linear, &p); 26 mutex_unlock(&priv->linear_lock); 27 28 return 0; 29 } 30 31 static int armada_debugfs_reg_show(struct seq_file *m, void *data) 32 { 33 struct drm_device *dev = m->private; 34 struct armada_private *priv = dev->dev_private; 35 int n, i; 36 37 if (priv) { 38 for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) { 39 struct armada_crtc *dcrtc = priv->dcrtc[n]; 40 if (!dcrtc) 41 continue; 42 43 for (i = 0x84; i <= 0x1c4; i += 4) { 44 uint32_t v = readl_relaxed(dcrtc->base + i); 45 seq_printf(m, "%u: 0x%04x: 0x%08x\n", n, i, v); 46 } 47 } 48 } 49 50 return 0; 51 } 52 53 static int armada_debugfs_reg_r_open(struct inode *inode, struct file *file) 54 { 55 return single_open(file, armada_debugfs_reg_show, inode->i_private); 56 } 57 58 static const struct file_operations fops_reg_r = { 59 .owner = THIS_MODULE, 60 .open = armada_debugfs_reg_r_open, 61 .read = seq_read, 62 .llseek = seq_lseek, 63 .release = single_release, 64 }; 65 66 static int armada_debugfs_write(struct file *file, const char __user *ptr, 67 size_t len, loff_t *off) 68 { 69 struct drm_device *dev = file->private_data; 70 struct armada_private *priv = dev->dev_private; 71 struct armada_crtc *dcrtc = priv->dcrtc[0]; 72 char buf[32], *p; 73 uint32_t reg, val; 74 int ret; 75 76 if (*off != 0) 77 return 0; 78 79 if (len > sizeof(buf) - 1) 80 len = sizeof(buf) - 1; 81 82 ret = strncpy_from_user(buf, ptr, len); 83 if (ret < 0) 84 return ret; 85 buf[len] = '\0'; 86 87 reg = simple_strtoul(buf, &p, 16); 88 if (!isspace(*p)) 89 return -EINVAL; 90 val = simple_strtoul(p + 1, NULL, 16); 91 92 if (reg >= 0x84 && reg <= 0x1c4) 93 writel(val, dcrtc->base + reg); 94 95 return len; 96 } 97 98 static const struct file_operations fops_reg_w = { 99 .owner = THIS_MODULE, 100 .open = simple_open, 101 .write = armada_debugfs_write, 102 .llseek = noop_llseek, 103 }; 104 105 static struct drm_info_list armada_debugfs_list[] = { 106 { "gem_linear", armada_debugfs_gem_linear_show, 0 }, 107 }; 108 #define ARMADA_DEBUGFS_ENTRIES ARRAY_SIZE(armada_debugfs_list) 109 110 int armada_drm_debugfs_init(struct drm_minor *minor) 111 { 112 struct dentry *de; 113 int ret; 114 115 ret = drm_debugfs_create_files(armada_debugfs_list, 116 ARMADA_DEBUGFS_ENTRIES, 117 minor->debugfs_root, minor); 118 if (ret) 119 return ret; 120 121 de = debugfs_create_file("reg", S_IFREG | S_IRUSR, 122 minor->debugfs_root, minor->dev, &fops_reg_r); 123 if (!de) 124 return -ENOMEM; 125 126 de = debugfs_create_file("reg_wr", S_IFREG | S_IWUSR, 127 minor->debugfs_root, minor->dev, &fops_reg_w); 128 if (!de) 129 return -ENOMEM; 130 131 return 0; 132 } 133