1 /* 2 * Procfs interface for the Zorro bus. 3 * 4 * Copyright (C) 1998-2003 Geert Uytterhoeven 5 * 6 * Heavily based on the procfs interface for the PCI bus, which is 7 * 8 * Copyright (C) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz> 9 */ 10 11 #include <linux/types.h> 12 #include <linux/zorro.h> 13 #include <linux/proc_fs.h> 14 #include <linux/seq_file.h> 15 #include <linux/init.h> 16 #include <linux/export.h> 17 #include <asm/uaccess.h> 18 #include <asm/amigahw.h> 19 #include <asm/setup.h> 20 21 static loff_t 22 proc_bus_zorro_lseek(struct file *file, loff_t off, int whence) 23 { 24 loff_t new = -1; 25 struct inode *inode = file->f_path.dentry->d_inode; 26 27 mutex_lock(&inode->i_mutex); 28 switch (whence) { 29 case 0: 30 new = off; 31 break; 32 case 1: 33 new = file->f_pos + off; 34 break; 35 case 2: 36 new = sizeof(struct ConfigDev) + off; 37 break; 38 } 39 if (new < 0 || new > sizeof(struct ConfigDev)) 40 new = -EINVAL; 41 else 42 file->f_pos = new; 43 mutex_unlock(&inode->i_mutex); 44 return new; 45 } 46 47 static ssize_t 48 proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) 49 { 50 struct inode *ino = file->f_path.dentry->d_inode; 51 struct proc_dir_entry *dp = PDE(ino); 52 struct zorro_dev *z = dp->data; 53 struct ConfigDev cd; 54 loff_t pos = *ppos; 55 56 if (pos >= sizeof(struct ConfigDev)) 57 return 0; 58 if (nbytes >= sizeof(struct ConfigDev)) 59 nbytes = sizeof(struct ConfigDev); 60 if (pos + nbytes > sizeof(struct ConfigDev)) 61 nbytes = sizeof(struct ConfigDev) - pos; 62 63 /* Construct a ConfigDev */ 64 memset(&cd, 0, sizeof(cd)); 65 cd.cd_Rom = z->rom; 66 cd.cd_SlotAddr = z->slotaddr; 67 cd.cd_SlotSize = z->slotsize; 68 cd.cd_BoardAddr = (void *)zorro_resource_start(z); 69 cd.cd_BoardSize = zorro_resource_len(z); 70 71 if (copy_to_user(buf, (void *)&cd + pos, nbytes)) 72 return -EFAULT; 73 *ppos += nbytes; 74 75 return nbytes; 76 } 77 78 static const struct file_operations proc_bus_zorro_operations = { 79 .owner = THIS_MODULE, 80 .llseek = proc_bus_zorro_lseek, 81 .read = proc_bus_zorro_read, 82 }; 83 84 static void * zorro_seq_start(struct seq_file *m, loff_t *pos) 85 { 86 return (*pos < zorro_num_autocon) ? pos : NULL; 87 } 88 89 static void * zorro_seq_next(struct seq_file *m, void *v, loff_t *pos) 90 { 91 (*pos)++; 92 return (*pos < zorro_num_autocon) ? pos : NULL; 93 } 94 95 static void zorro_seq_stop(struct seq_file *m, void *v) 96 { 97 } 98 99 static int zorro_seq_show(struct seq_file *m, void *v) 100 { 101 unsigned int slot = *(loff_t *)v; 102 struct zorro_dev *z = &zorro_autocon[slot]; 103 104 seq_printf(m, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot, z->id, 105 (unsigned long)zorro_resource_start(z), 106 (unsigned long)zorro_resource_len(z), 107 z->rom.er_Type); 108 return 0; 109 } 110 111 static const struct seq_operations zorro_devices_seq_ops = { 112 .start = zorro_seq_start, 113 .next = zorro_seq_next, 114 .stop = zorro_seq_stop, 115 .show = zorro_seq_show, 116 }; 117 118 static int zorro_devices_proc_open(struct inode *inode, struct file *file) 119 { 120 return seq_open(file, &zorro_devices_seq_ops); 121 } 122 123 static const struct file_operations zorro_devices_proc_fops = { 124 .owner = THIS_MODULE, 125 .open = zorro_devices_proc_open, 126 .read = seq_read, 127 .llseek = seq_lseek, 128 .release = seq_release, 129 }; 130 131 static struct proc_dir_entry *proc_bus_zorro_dir; 132 133 static int __init zorro_proc_attach_device(unsigned int slot) 134 { 135 struct proc_dir_entry *entry; 136 char name[4]; 137 138 sprintf(name, "%02x", slot); 139 entry = proc_create_data(name, 0, proc_bus_zorro_dir, 140 &proc_bus_zorro_operations, 141 &zorro_autocon[slot]); 142 if (!entry) 143 return -ENOMEM; 144 entry->size = sizeof(struct zorro_dev); 145 return 0; 146 } 147 148 static int __init zorro_proc_init(void) 149 { 150 unsigned int slot; 151 152 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) { 153 proc_bus_zorro_dir = proc_mkdir("bus/zorro", NULL); 154 proc_create("devices", 0, proc_bus_zorro_dir, 155 &zorro_devices_proc_fops); 156 for (slot = 0; slot < zorro_num_autocon; slot++) 157 zorro_proc_attach_device(slot); 158 } 159 return 0; 160 } 161 162 device_initcall(zorro_proc_init); 163