socket_sysfs.c (5773B)
1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * socket_sysfs.c -- most of socket-related sysfs output 4 * 5 * (C) 2003 - 2004 Dominik Brodowski 6 */ 7 8#include <linux/module.h> 9#include <linux/moduleparam.h> 10#include <linux/init.h> 11#include <linux/kernel.h> 12#include <linux/string.h> 13#include <linux/major.h> 14#include <linux/errno.h> 15#include <linux/mm.h> 16#include <linux/interrupt.h> 17#include <linux/timer.h> 18#include <linux/ioport.h> 19#include <linux/delay.h> 20#include <linux/pm.h> 21#include <linux/device.h> 22#include <linux/mutex.h> 23#include <asm/irq.h> 24 25#include <pcmcia/ss.h> 26#include <pcmcia/cistpl.h> 27#include <pcmcia/cisreg.h> 28#include <pcmcia/ds.h> 29#include "cs_internal.h" 30 31#define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev) 32 33static ssize_t pccard_show_type(struct device *dev, struct device_attribute *attr, 34 char *buf) 35{ 36 struct pcmcia_socket *s = to_socket(dev); 37 38 if (!(s->state & SOCKET_PRESENT)) 39 return -ENODEV; 40 if (s->state & SOCKET_CARDBUS) 41 return sysfs_emit(buf, "32-bit\n"); 42 return sysfs_emit(buf, "16-bit\n"); 43} 44static DEVICE_ATTR(card_type, 0444, pccard_show_type, NULL); 45 46static ssize_t pccard_show_voltage(struct device *dev, struct device_attribute *attr, 47 char *buf) 48{ 49 struct pcmcia_socket *s = to_socket(dev); 50 51 if (!(s->state & SOCKET_PRESENT)) 52 return -ENODEV; 53 if (s->socket.Vcc) 54 return sysfs_emit(buf, "%d.%dV\n", s->socket.Vcc / 10, 55 s->socket.Vcc % 10); 56 return sysfs_emit(buf, "X.XV\n"); 57} 58static DEVICE_ATTR(card_voltage, 0444, pccard_show_voltage, NULL); 59 60static ssize_t pccard_show_vpp(struct device *dev, struct device_attribute *attr, 61 char *buf) 62{ 63 struct pcmcia_socket *s = to_socket(dev); 64 if (!(s->state & SOCKET_PRESENT)) 65 return -ENODEV; 66 return sysfs_emit(buf, "%d.%dV\n", s->socket.Vpp / 10, s->socket.Vpp % 10); 67} 68static DEVICE_ATTR(card_vpp, 0444, pccard_show_vpp, NULL); 69 70static ssize_t pccard_show_vcc(struct device *dev, struct device_attribute *attr, 71 char *buf) 72{ 73 struct pcmcia_socket *s = to_socket(dev); 74 if (!(s->state & SOCKET_PRESENT)) 75 return -ENODEV; 76 return sysfs_emit(buf, "%d.%dV\n", s->socket.Vcc / 10, s->socket.Vcc % 10); 77} 78static DEVICE_ATTR(card_vcc, 0444, pccard_show_vcc, NULL); 79 80 81static ssize_t pccard_store_insert(struct device *dev, struct device_attribute *attr, 82 const char *buf, size_t count) 83{ 84 struct pcmcia_socket *s = to_socket(dev); 85 86 if (!count) 87 return -EINVAL; 88 89 pcmcia_parse_uevents(s, PCMCIA_UEVENT_INSERT); 90 91 return count; 92} 93static DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert); 94 95 96static ssize_t pccard_show_card_pm_state(struct device *dev, 97 struct device_attribute *attr, 98 char *buf) 99{ 100 struct pcmcia_socket *s = to_socket(dev); 101 return sysfs_emit(buf, "%s\n", s->state & SOCKET_SUSPEND ? "off" : "on"); 102} 103 104static ssize_t pccard_store_card_pm_state(struct device *dev, 105 struct device_attribute *attr, 106 const char *buf, size_t count) 107{ 108 struct pcmcia_socket *s = to_socket(dev); 109 ssize_t ret = count; 110 111 if (!count) 112 return -EINVAL; 113 114 if (!strncmp(buf, "off", 3)) 115 pcmcia_parse_uevents(s, PCMCIA_UEVENT_SUSPEND); 116 else { 117 if (!strncmp(buf, "on", 2)) 118 pcmcia_parse_uevents(s, PCMCIA_UEVENT_RESUME); 119 else 120 ret = -EINVAL; 121 } 122 123 return ret; 124} 125static DEVICE_ATTR(card_pm_state, 0644, pccard_show_card_pm_state, pccard_store_card_pm_state); 126 127static ssize_t pccard_store_eject(struct device *dev, 128 struct device_attribute *attr, 129 const char *buf, size_t count) 130{ 131 struct pcmcia_socket *s = to_socket(dev); 132 133 if (!count) 134 return -EINVAL; 135 136 pcmcia_parse_uevents(s, PCMCIA_UEVENT_EJECT); 137 138 return count; 139} 140static DEVICE_ATTR(card_eject, 0200, NULL, pccard_store_eject); 141 142 143static ssize_t pccard_show_irq_mask(struct device *dev, 144 struct device_attribute *attr, 145 char *buf) 146{ 147 struct pcmcia_socket *s = to_socket(dev); 148 return sysfs_emit(buf, "0x%04x\n", s->irq_mask); 149} 150 151static ssize_t pccard_store_irq_mask(struct device *dev, 152 struct device_attribute *attr, 153 const char *buf, size_t count) 154{ 155 ssize_t ret; 156 struct pcmcia_socket *s = to_socket(dev); 157 u32 mask; 158 159 if (!count) 160 return -EINVAL; 161 162 ret = sscanf(buf, "0x%x\n", &mask); 163 164 if (ret == 1) { 165 mutex_lock(&s->ops_mutex); 166 s->irq_mask &= mask; 167 mutex_unlock(&s->ops_mutex); 168 ret = 0; 169 } 170 171 return ret ? ret : count; 172} 173static DEVICE_ATTR(card_irq_mask, 0600, pccard_show_irq_mask, pccard_store_irq_mask); 174 175 176static ssize_t pccard_show_resource(struct device *dev, 177 struct device_attribute *attr, char *buf) 178{ 179 struct pcmcia_socket *s = to_socket(dev); 180 return sysfs_emit(buf, "%s\n", s->resource_setup_done ? "yes" : "no"); 181} 182 183static ssize_t pccard_store_resource(struct device *dev, 184 struct device_attribute *attr, 185 const char *buf, size_t count) 186{ 187 struct pcmcia_socket *s = to_socket(dev); 188 189 if (!count) 190 return -EINVAL; 191 192 mutex_lock(&s->ops_mutex); 193 if (!s->resource_setup_done) 194 s->resource_setup_done = 1; 195 mutex_unlock(&s->ops_mutex); 196 197 pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY); 198 199 return count; 200} 201static DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource); 202 203static struct attribute *pccard_socket_attributes[] = { 204 &dev_attr_card_type.attr, 205 &dev_attr_card_voltage.attr, 206 &dev_attr_card_vpp.attr, 207 &dev_attr_card_vcc.attr, 208 &dev_attr_card_insert.attr, 209 &dev_attr_card_pm_state.attr, 210 &dev_attr_card_eject.attr, 211 &dev_attr_card_irq_mask.attr, 212 &dev_attr_available_resources_setup_done.attr, 213 NULL, 214}; 215 216static const struct attribute_group socket_attrs = { 217 .attrs = pccard_socket_attributes, 218}; 219 220int pccard_sysfs_add_socket(struct device *dev) 221{ 222 return sysfs_create_group(&dev->kobj, &socket_attrs); 223} 224 225void pccard_sysfs_remove_socket(struct device *dev) 226{ 227 sysfs_remove_group(&dev->kobj, &socket_attrs); 228}