text: // SPDX-License-Identifier: GPL-2.0-only
  /*
   * socket_sysfs.c -- most of socket-related sysfs output
   *
   * (C) 2003 - 2004		Dominik Brodowski
   */
  
  #include <linux/module.h>
  #include <linux/moduleparam.h>
  #include <linux/init.h>
  #include <linux/kernel.h>
  #include <linux/string.h>
  #include <linux/major.h>
  #include <linux/errno.h>
  #include <linux/mm.h>
  #include <linux/interrupt.h>
  #include <linux/timer.h>
  #include <linux/ioport.h>
  #include <linux/delay.h>
  #include <linux/pm.h>
  #include <linux/device.h>
  #include <linux/mutex.h>
  #include <asm/irq.h>
  
  #include <pcmcia/ss.h>
  #include <pcmcia/cistpl.h>
  #include <pcmcia/cisreg.h>
  #include <pcmcia/ds.h>
  #include "cs_internal.h"
  
  #define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev)
  
  static ssize_t pccard_show_type(struct device *dev, struct device_attribute *attr,
  				char *buf)
  {
  	struct pcmcia_socket *s = to_socket(dev);
  
  	if (!(s->state & SOCKET_PRESENT))
  		return -ENODEV;
  	if (s->state & SOCKET_CARDBUS)
  		return sprintf(buf, "32-bit\n");
  	return sprintf(buf, "16-bit\n");
  }
  static DEVICE_ATTR(card_type, 0444, pccard_show_type, NULL);
  
  static ssize_t pccard_show_voltage(struct device *dev, struct device_attribute *attr,
  				   char *buf)
  {
  	struct pcmcia_socket *s = to_socket(dev);
  
  	if (!(s->state & SOCKET_PRESENT))
  		return -ENODEV;
  	if (s->socket.Vcc)
  		return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10,
  			       s->socket.Vcc % 10);
  	return sprintf(buf, "X.XV\n");
  }
  static DEVICE_ATTR(card_voltage, 0444, pccard_show_voltage, NULL);
  
  static ssize_t pccard_show_vpp(struct device *dev, struct device_attribute *attr,
  			       char *buf)
  {
  	struct pcmcia_socket *s = to_socket(dev);
  	if (!(s->state & SOCKET_PRESENT))
  		return -ENODEV;
  	return sprintf(buf, "%d.%dV\n", s->socket.Vpp / 10, s->socket.Vpp % 10);
  }
  static DEVICE_ATTR(card_vpp, 0444, pccard_show_vpp, NULL);
  
  static ssize_t pccard_show_vcc(struct device *dev, struct device_attribute *attr,
  			       char *buf)
  {
  	struct pcmcia_socket *s = to_socket(dev);
  	if (!(s->state & SOCKET_PRESENT))
  		return -ENODEV;
  	return sprintf(buf, "%d.%dV\n", s->socket.Vcc / 10, s->socket.Vcc % 10);
  }
  static DEVICE_ATTR(card_vcc, 0444, pccard_show_vcc, NULL);
  
  
  static ssize_t pccard_store_insert(struct device *dev, struct device_attribute *attr,
  				   const char *buf, size_t count)
  {
  	struct pcmcia_socket *s = to_socket(dev);
  
  	if (!count)
  		return -EINVAL;
  
  	pcmcia_parse_uevents(s, PCMCIA_UEVENT_INSERT);
  
  	return count;
  }
  static DEVICE_ATTR(card_insert, 0200, NULL, pccard_store_insert);
  
  
  static ssize_t pccard_show_card_pm_state(struct device *dev,
  					 struct device_attribute *attr,
  					 char *buf)
  {
  	struct pcmcia_socket *s = to_socket(dev);
  	return sprintf(buf, "%s\n", s->state & SOCKET_SUSPEND ? "off" : "on");
  }
  
  static ssize_t pccard_store_card_pm_state(struct device *dev,
  					  struct device_attribute *attr,
  					  const char *buf, size_t count)
  {
  	struct pcmcia_socket *s = to_socket(dev);
  	ssize_t ret = count;
  
  	if (!count)
  		return -EINVAL;
  
  	if (!strncmp(buf, "off", 3))
  		pcmcia_parse_uevents(s, PCMCIA_UEVENT_SUSPEND);
  	else {
  		if (!strncmp(buf, "on", 2))
  			pcmcia_parse_uevents(s, PCMCIA_UEVENT_RESUME);
  		else
  			ret = -EINVAL;
  	}
  
  	return ret;
  }
  static DEVICE_ATTR(card_pm_state, 0644, pccard_show_card_pm_state, pccard_store_card_pm_state);
  
  static ssize_t pccard_store_eject(struct device *dev,
  				  struct device_attribute *attr,
  				  const char *buf, size_t count)
  {
  	struct pcmcia_socket *s = to_socket(dev);
  
  	if (!count)
  		return -EINVAL;
  
  	pcmcia_parse_uevents(s, PCMCIA_UEVENT_EJECT);
  
  	return count;
  }
  static DEVICE_ATTR(card_eject, 0200, NULL, pccard_store_eject);
  
  
  static ssize_t pccard_show_irq_mask(struct device *dev,
  				    struct device_attribute *attr,
  				    char *buf)
  {
  	struct pcmcia_socket *s = to_socket(dev);
  	return sprintf(buf, "0x%04x\n", s->irq_mask);
  }
  
  static ssize_t pccard_store_irq_mask(struct device *dev,
  				     struct device_attribute *attr,
  				     const char *buf, size_t count)
  {
  	ssize_t ret;
  	struct pcmcia_socket *s = to_socket(dev);
  	u32 mask;
  
  	if (!count)
  		return -EINVAL;
  
  	ret = sscanf(buf, "0x%x\n", &mask);
  
  	if (ret == 1) {
  		mutex_lock(&s->ops_mutex);
  		s->irq_mask &= mask;
  		mutex_unlock(&s->ops_mutex);
  		ret = 0;
  	}
  
  	return ret ? ret : count;
  }
  static DEVICE_ATTR(card_irq_mask, 0600, pccard_show_irq_mask, pccard_store_irq_mask);
  
  
  static ssize_t pccard_show_resource(struct device *dev,
  				    struct device_attribute *attr, char *buf)
  {
  	struct pcmcia_socket *s = to_socket(dev);
  	return sprintf(buf, "%s\n", s->resource_setup_done ? "yes" : "no");
  }
  
  static ssize_t pccard_store_resource(struct device *dev,
  				     struct device_attribute *attr,
  				     const char *buf, size_t count)
  {
  	struct pcmcia_socket *s = to_socket(dev);
  
  	if (!count)
  		return -EINVAL;
  
  	mutex_lock(&s->ops_mutex);
  	if (!s->resource_setup_done)
  		s->resource_setup_done = 1;
  	mutex_unlock(&s->ops_mutex);
  
  	pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
  
  	return count;
  }
  static DEVICE_ATTR(available_resources_setup_done, 0600, pccard_show_resource, pccard_store_resource);
  
  static struct attribute *pccard_socket_attributes[] = {
  	&dev_attr_card_type.attr,
  	&dev_attr_card_voltage.attr,
  	&dev_attr_card_vpp.attr,
  	&dev_attr_card_vcc.attr,
  	&dev_attr_card_insert.attr,
  	&dev_attr_card_pm_state.attr,
  	&dev_attr_card_eject.attr,
  	&dev_attr_card_irq_mask.attr,
  	&dev_attr_available_resources_setup_done.attr,
  	NULL,
  };
  
  static const struct attribute_group socket_attrs = {
  	.attrs = pccard_socket_attributes,
  };
  
  int pccard_sysfs_add_socket(struct device *dev)
  {
  	return sysfs_create_group(&dev->kobj, &socket_attrs);
  }
  
  void pccard_sysfs_remove_socket(struct device *dev)
  {
  	sysfs_remove_group(&dev->kobj, &socket_attrs);
  }
  