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/init.h> 17 #include <linux/smp_lock.h> 18 #include <asm/uaccess.h> 19 #include <asm/amigahw.h> 20 #include <asm/setup.h> 21 22 static loff_t 23 proc_bus_zorro_lseek(struct file *file, loff_t off, int whence) 24 { 25 loff_t new = -1; 26 27 lock_kernel(); 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 unlock_kernel(); 41 return -EINVAL; 42 } 43 unlock_kernel(); 44 return (file->f_pos = 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_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, &cd, nbytes)) 72 return -EFAULT; 73 *ppos += nbytes; 74 75 return nbytes; 76 } 77 78 static struct file_operations proc_bus_zorro_operations = { 79 .llseek = proc_bus_zorro_lseek, 80 .read = proc_bus_zorro_read, 81 }; 82 83 static int 84 get_zorro_dev_info(char *buf, char **start, off_t pos, int count) 85 { 86 u_int slot; 87 off_t at = 0; 88 int len, cnt; 89 90 for (slot = cnt = 0; slot < zorro_num_autocon && count > cnt; slot++) { 91 struct zorro_dev *z = &zorro_autocon[slot]; 92 len = sprintf(buf, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot, 93 z->id, zorro_resource_start(z), 94 zorro_resource_len(z), z->rom.er_Type); 95 at += len; 96 if (at >= pos) { 97 if (!*start) { 98 *start = buf + (pos - (at - len)); 99 cnt = at - pos; 100 } else 101 cnt += len; 102 buf += len; 103 } 104 } 105 return (count > cnt) ? cnt : count; 106 } 107 108 static struct proc_dir_entry *proc_bus_zorro_dir; 109 110 static int __init zorro_proc_attach_device(u_int slot) 111 { 112 struct proc_dir_entry *entry; 113 char name[4]; 114 115 sprintf(name, "%02x", slot); 116 entry = create_proc_entry(name, 0, proc_bus_zorro_dir); 117 if (!entry) 118 return -ENOMEM; 119 entry->proc_fops = &proc_bus_zorro_operations; 120 entry->data = &zorro_autocon[slot]; 121 entry->size = sizeof(struct zorro_dev); 122 return 0; 123 } 124 125 static int __init zorro_proc_init(void) 126 { 127 u_int slot; 128 129 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) { 130 proc_bus_zorro_dir = proc_mkdir("zorro", proc_bus); 131 create_proc_info_entry("devices", 0, proc_bus_zorro_dir, 132 get_zorro_dev_info); 133 for (slot = 0; slot < zorro_num_autocon; slot++) 134 zorro_proc_attach_device(slot); 135 } 136 return 0; 137 } 138 139 __initcall(zorro_proc_init); 140