1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Procfs interface for the Zorro bus. 4 * 5 * Copyright (C) 1998-2003 Geert Uytterhoeven 6 * 7 * Heavily based on the procfs interface for the PCI bus, which is 8 * 9 * Copyright (C) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz> 10 */ 11 12 #include <linux/types.h> 13 #include <linux/zorro.h> 14 #include <linux/proc_fs.h> 15 #include <linux/seq_file.h> 16 #include <linux/init.h> 17 #include <linux/export.h> 18 19 #include <asm/byteorder.h> 20 #include <linux/uaccess.h> 21 #include <asm/amigahw.h> 22 #include <asm/setup.h> 23 24 static loff_t 25 proc_bus_zorro_lseek(struct file *file, loff_t off, int whence) 26 { 27 return fixed_size_llseek(file, off, whence, sizeof(struct ConfigDev)); 28 } 29 30 static ssize_t 31 proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) 32 { 33 struct zorro_dev *z = PDE_DATA(file_inode(file)); 34 struct ConfigDev cd; 35 loff_t pos = *ppos; 36 37 if (pos >= sizeof(struct ConfigDev)) 38 return 0; 39 if (nbytes >= sizeof(struct ConfigDev)) 40 nbytes = sizeof(struct ConfigDev); 41 if (pos + nbytes > sizeof(struct ConfigDev)) 42 nbytes = sizeof(struct ConfigDev) - pos; 43 44 /* Construct a ConfigDev */ 45 memset(&cd, 0, sizeof(cd)); 46 cd.cd_Rom = z->rom; 47 cd.cd_SlotAddr = cpu_to_be16(z->slotaddr); 48 cd.cd_SlotSize = cpu_to_be16(z->slotsize); 49 cd.cd_BoardAddr = cpu_to_be32(zorro_resource_start(z)); 50 cd.cd_BoardSize = cpu_to_be32(zorro_resource_len(z)); 51 52 if (copy_to_user(buf, (void *)&cd + pos, nbytes)) 53 return -EFAULT; 54 *ppos += nbytes; 55 56 return nbytes; 57 } 58 59 static const struct file_operations proc_bus_zorro_operations = { 60 .owner = THIS_MODULE, 61 .llseek = proc_bus_zorro_lseek, 62 .read = proc_bus_zorro_read, 63 }; 64 65 static void * zorro_seq_start(struct seq_file *m, loff_t *pos) 66 { 67 return (*pos < zorro_num_autocon) ? pos : NULL; 68 } 69 70 static void * zorro_seq_next(struct seq_file *m, void *v, loff_t *pos) 71 { 72 (*pos)++; 73 return (*pos < zorro_num_autocon) ? pos : NULL; 74 } 75 76 static void zorro_seq_stop(struct seq_file *m, void *v) 77 { 78 } 79 80 static int zorro_seq_show(struct seq_file *m, void *v) 81 { 82 unsigned int slot = *(loff_t *)v; 83 struct zorro_dev *z = &zorro_autocon[slot]; 84 85 seq_printf(m, "%02x\t%08x\t%08lx\t%08lx\t%02x\n", slot, z->id, 86 (unsigned long)zorro_resource_start(z), 87 (unsigned long)zorro_resource_len(z), 88 z->rom.er_Type); 89 return 0; 90 } 91 92 static const struct seq_operations zorro_devices_seq_ops = { 93 .start = zorro_seq_start, 94 .next = zorro_seq_next, 95 .stop = zorro_seq_stop, 96 .show = zorro_seq_show, 97 }; 98 99 static struct proc_dir_entry *proc_bus_zorro_dir; 100 101 static int __init zorro_proc_attach_device(unsigned int slot) 102 { 103 struct proc_dir_entry *entry; 104 char name[4]; 105 106 sprintf(name, "%02x", slot); 107 entry = proc_create_data(name, 0, proc_bus_zorro_dir, 108 &proc_bus_zorro_operations, 109 &zorro_autocon[slot]); 110 if (!entry) 111 return -ENOMEM; 112 proc_set_size(entry, sizeof(struct zorro_dev)); 113 return 0; 114 } 115 116 static int __init zorro_proc_init(void) 117 { 118 unsigned int slot; 119 120 if (MACH_IS_AMIGA && AMIGAHW_PRESENT(ZORRO)) { 121 proc_bus_zorro_dir = proc_mkdir("bus/zorro", NULL); 122 proc_create_seq("devices", 0, proc_bus_zorro_dir, 123 &zorro_devices_seq_ops); 124 for (slot = 0; slot < zorro_num_autocon; slot++) 125 zorro_proc_attach_device(slot); 126 } 127 return 0; 128 } 129 130 device_initcall(zorro_proc_init); 131