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_inode(file); 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 zorro_dev *z = PDE_DATA(file_inode(file)); 51 struct ConfigDev cd; 52 loff_t pos = *ppos; 53 54 if (pos >= sizeof(struct ConfigDev)) 55 return 0; 56 if (nbytes >= sizeof(struct ConfigDev)) 57 nbytes = sizeof(struct ConfigDev); 58 if (pos + nbytes > sizeof(struct ConfigDev)) 59 nbytes = sizeof(struct ConfigDev) - pos; 60 61 /* Construct a ConfigDev */ 62 memset(&cd, 0, sizeof(cd)); 63 cd.cd_Rom = z->rom; 64 cd.cd_SlotAddr = z->slotaddr; 65 cd.cd_SlotSize = z->slotsize; 66 cd.cd_BoardAddr = (void *)zorro_resource_start(z); 67 cd.cd_BoardSize = zorro_resource_len(z); 68 69 if (copy_to_user(buf, (void *)&cd + pos, nbytes)) 70 return -EFAULT; 71 *ppos += nbytes; 72 73 return nbytes; 74 } 75 76 static const struct file_operations proc_bus_zorro_operations = { 77 .owner = THIS_MODULE, 78 .llseek = proc_bus_zorro_lseek, 79 .read = proc_bus_zorro_read, 80 }; 81 82 static void * zorro_seq_start(struct seq_file *m, loff_t *pos) 83 { 84 return (*pos < zorro_num_autocon) ? pos : NULL; 85 } 86 87 static void * zorro_seq_next(struct seq_file *m, void *v, loff_t *pos) 88 { 89 (*pos)++; 90 return (*pos < zorro_num_autocon) ? pos : NULL; 91 } 92 93 static void zorro_seq_stop(struct seq_file *m, void *v) 94 { 95 } 96 97 static int zorro_seq_show(struct seq_file *m, void *v) 98 { 99 unsigned int slot = *(loff_t *)v; 100 struct zorro_dev *z = &zorro_autocon[slot]; 101 102 seq_printf(m, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot, z->id, 103 (unsigned long)zorro_resource_start(z), 104 (unsigned long)zorro_resource_len(z), 105 z->rom.er_Type); 106 return 0; 107 } 108 109 static const struct seq_operations zorro_devices_seq_ops = { 110 .start = zorro_seq_start, 111 .next = zorro_seq_next, 112 .stop = zorro_seq_stop, 113 .show = zorro_seq_show, 114 }; 115 116 static int zorro_devices_proc_open(struct inode *inode, struct file *file) 117 { 118 return seq_open(file, &zorro_devices_seq_ops); 119 } 120 121 static const struct file_operations zorro_devices_proc_fops = { 122 .owner = THIS_MODULE, 123 .open = zorro_devices_proc_open, 124 .read = seq_read, 125 .llseek = seq_lseek, 126 .release = seq_release, 127 }; 128 129 static struct proc_dir_entry *proc_bus_zorro_dir; 130 131 static int __init zorro_proc_attach_device(unsigned int slot) 132 { 133 struct proc_dir_entry *entry; 134 char name[4]; 135 136 sprintf(name, "%02x", slot); 137 entry = proc_create_data(name, 0, proc_bus_zorro_dir, 138 &proc_bus_zorro_operations, 139 &zorro_autocon[slot]); 140 if (!entry) 141 return -ENOMEM; 142 proc_set_size(entry, sizeof(struct zorro_dev)); 143 return 0; 144 } 145 146 static int __init zorro_proc_init(void) 147 { 148 unsigned int slot; 149 150 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) { 151 proc_bus_zorro_dir = proc_mkdir("bus/zorro", NULL); 152 proc_create("devices", 0, proc_bus_zorro_dir, 153 &zorro_devices_proc_fops); 154 for (slot = 0; slot < zorro_num_autocon; slot++) 155 zorro_proc_attach_device(slot); 156 } 157 return 0; 158 } 159 160 device_initcall(zorro_proc_init); 161