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