1 /* 2 * $Id: proc.c,v 1.1.2.1 1998/06/07 23:21:01 geert Exp $ 3 * 4 * Procfs interface for the Zorro bus. 5 * 6 * Copyright (C) 1998-2003 Geert Uytterhoeven 7 * 8 * Heavily based on the procfs interface for the PCI bus, which is 9 * 10 * Copyright (C) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz> 11 */ 12 13 #include <linux/types.h> 14 #include <linux/zorro.h> 15 #include <linux/proc_fs.h> 16 #include <linux/seq_file.h> 17 #include <linux/init.h> 18 #include <linux/smp_lock.h> 19 #include <asm/uaccess.h> 20 #include <asm/amigahw.h> 21 #include <asm/setup.h> 22 23 static loff_t 24 proc_bus_zorro_lseek(struct file *file, loff_t off, int whence) 25 { 26 loff_t new = -1; 27 28 lock_kernel(); 29 switch (whence) { 30 case 0: 31 new = off; 32 break; 33 case 1: 34 new = file->f_pos + off; 35 break; 36 case 2: 37 new = sizeof(struct ConfigDev) + off; 38 break; 39 } 40 if (new < 0 || new > sizeof(struct ConfigDev)) { 41 unlock_kernel(); 42 return -EINVAL; 43 } 44 unlock_kernel(); 45 return (file->f_pos = new); 46 } 47 48 static ssize_t 49 proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) 50 { 51 struct inode *ino = file->f_path.dentry->d_inode; 52 struct proc_dir_entry *dp = PDE(ino); 53 struct zorro_dev *z = dp->data; 54 struct ConfigDev cd; 55 loff_t pos = *ppos; 56 57 if (pos >= sizeof(struct ConfigDev)) 58 return 0; 59 if (nbytes >= sizeof(struct ConfigDev)) 60 nbytes = sizeof(struct ConfigDev); 61 if (pos + nbytes > sizeof(struct ConfigDev)) 62 nbytes = sizeof(struct ConfigDev) - pos; 63 64 /* Construct a ConfigDev */ 65 memset(&cd, 0, sizeof(cd)); 66 cd.cd_Rom = z->rom; 67 cd.cd_SlotAddr = z->slotaddr; 68 cd.cd_SlotSize = z->slotsize; 69 cd.cd_BoardAddr = (void *)zorro_resource_start(z); 70 cd.cd_BoardSize = zorro_resource_len(z); 71 72 if (copy_to_user(buf, &cd, nbytes)) 73 return -EFAULT; 74 *ppos += nbytes; 75 76 return nbytes; 77 } 78 79 static const struct file_operations proc_bus_zorro_operations = { 80 .owner = THIS_MODULE, 81 .llseek = proc_bus_zorro_lseek, 82 .read = proc_bus_zorro_read, 83 }; 84 85 static void * zorro_seq_start(struct seq_file *m, loff_t *pos) 86 { 87 return (*pos < zorro_num_autocon) ? pos : NULL; 88 } 89 90 static void * zorro_seq_next(struct seq_file *m, void *v, loff_t *pos) 91 { 92 (*pos)++; 93 return (*pos < zorro_num_autocon) ? pos : NULL; 94 } 95 96 static void zorro_seq_stop(struct seq_file *m, void *v) 97 { 98 } 99 100 static int zorro_seq_show(struct seq_file *m, void *v) 101 { 102 u_int slot = *(loff_t *)v; 103 struct zorro_dev *z = &zorro_autocon[slot]; 104 105 seq_printf(m, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot, z->id, 106 (unsigned long)zorro_resource_start(z), 107 (unsigned long)zorro_resource_len(z), 108 z->rom.er_Type); 109 return 0; 110 } 111 112 static const struct seq_operations zorro_devices_seq_ops = { 113 .start = zorro_seq_start, 114 .next = zorro_seq_next, 115 .stop = zorro_seq_stop, 116 .show = zorro_seq_show, 117 }; 118 119 static int zorro_devices_proc_open(struct inode *inode, struct file *file) 120 { 121 return seq_open(file, &zorro_devices_seq_ops); 122 } 123 124 static const struct file_operations zorro_devices_proc_fops = { 125 .owner = THIS_MODULE, 126 .open = zorro_devices_proc_open, 127 .read = seq_read, 128 .llseek = seq_lseek, 129 .release = seq_release, 130 }; 131 132 static struct proc_dir_entry *proc_bus_zorro_dir; 133 134 static int __init zorro_proc_attach_device(u_int slot) 135 { 136 struct proc_dir_entry *entry; 137 char name[4]; 138 139 sprintf(name, "%02x", slot); 140 entry = proc_create_data(name, 0, proc_bus_zorro_dir, 141 &proc_bus_zorro_operations, 142 &zorro_autocon[slot]); 143 if (!entry) 144 return -ENOMEM; 145 entry->size = sizeof(struct zorro_dev); 146 return 0; 147 } 148 149 static int __init zorro_proc_init(void) 150 { 151 u_int slot; 152 153 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) { 154 proc_bus_zorro_dir = proc_mkdir("bus/zorro", NULL); 155 proc_create("devices", 0, proc_bus_zorro_dir, 156 &zorro_devices_proc_fops); 157 for (slot = 0; slot < zorro_num_autocon; slot++) 158 zorro_proc_attach_device(slot); 159 } 160 return 0; 161 } 162 163 __initcall(zorro_proc_init); 164