// SPDX-License-Identifier: GPL-2.0-or-later

  /*
   * vrc4171_card.c, NEC VRC4171 Card Controller driver for Socket Services.
   *

   * Copyright (C) 2003-2005  Yoichi Yuasa <yuasa@linux-mips.org>

   */
  #include <linux/init.h>
  #include <linux/ioport.h>
  #include <linux/interrupt.h>
  #include <linux/module.h>
  #include <linux/spinlock.h>

  #include <linux/types.h>

  #include <linux/platform_device.h>

  
  #include <asm/io.h>
  
  #include <pcmcia/ss.h>
  
  #include "i82365.h"
  
  MODULE_DESCRIPTION("NEC VRC4171 Card Controllers driver for Socket Services");

  MODULE_AUTHOR("Yoichi Yuasa <yuasa@linux-mips.org>");

  MODULE_LICENSE("GPL");
  
  #define CARD_MAX_SLOTS		2
  #define CARD_SLOTA		0
  #define CARD_SLOTB		1
  #define CARD_SLOTB_OFFSET	0x40
  
  #define CARD_MEM_START		0x10000000
  #define CARD_MEM_END		0x13ffffff
  #define CARD_MAX_MEM_OFFSET	0x3ffffff
  #define CARD_MAX_MEM_SPEED	1000
  
  #define CARD_CONTROLLER_INDEX	0x03e0
  #define CARD_CONTROLLER_DATA	0x03e1
   /* Power register */
    #define VPP_GET_VCC		0x01
    #define POWER_ENABLE		0x10
   #define CARD_VOLTAGE_SENSE	0x1f
    #define VCC_3VORXV_CAPABLE	0x00
    #define VCC_XV_ONLY		0x01
    #define VCC_3V_CAPABLE	0x02
    #define VCC_5V_ONLY		0x03
   #define CARD_VOLTAGE_SELECT	0x2f
    #define VCC_3V		0x01
    #define VCC_5V		0x00
    #define VCC_XV		0x02
    #define VCC_STATUS_3V		0x02
    #define VCC_STATUS_5V		0x01
    #define VCC_STATUS_XV		0x03
   #define GLOBAL_CONTROL		0x1e
    #define EXWRBK		0x04
    #define IRQPM_EN		0x08
    #define CLRPMIRQ		0x10
  
  #define INTERRUPT_STATUS	0x05fa
   #define IRQ_A			0x02
   #define IRQ_B			0x04
  
  #define CONFIGURATION1		0x05fe
   #define SLOTB_CONFIG		0xc000
   #define SLOTB_NONE		0x0000
   #define SLOTB_PCCARD		0x4000
   #define SLOTB_CF		0x8000
   #define SLOTB_FLASHROM		0xc000
  
  #define CARD_CONTROLLER_START	CARD_CONTROLLER_INDEX
  #define CARD_CONTROLLER_END	CARD_CONTROLLER_DATA
  
  #define IO_MAX_MAPS	2
  #define MEM_MAX_MAPS	5

  enum vrc4171_slot {

  	SLOT_PROBE = 0,
  	SLOT_NOPROBE_IO,
  	SLOT_NOPROBE_MEM,
  	SLOT_NOPROBE_ALL,
  	SLOT_INITIALIZED,

  };

  enum vrc4171_slotb {

  	SLOTB_IS_NONE,
  	SLOTB_IS_PCCARD,
  	SLOTB_IS_CF,
  	SLOTB_IS_FLASHROM,

  };

  struct vrc4171_socket {
  	enum vrc4171_slot slot;

  	struct pcmcia_socket pcmcia_socket;
  	char name[24];
  	int csc_irq;
  	int io_irq;

  	spinlock_t lock;

  };

  static struct vrc4171_socket vrc4171_sockets[CARD_MAX_SLOTS];
  static enum vrc4171_slotb vrc4171_slotb = SLOTB_IS_NONE;

  static char vrc4171_card_name[] = "NEC VRC4171 Card Controller";
  static unsigned int vrc4171_irq;
  static uint16_t vrc4171_irq_mask = 0xdeb8;
  
  static struct resource vrc4171_card_resource[3] = {
  	{	.name		= vrc4171_card_name,
  		.start		= CARD_CONTROLLER_START,
  		.end		= CARD_CONTROLLER_END,
  		.flags		= IORESOURCE_IO,	},
  	{	.name		= vrc4171_card_name,
  		.start		= INTERRUPT_STATUS,
  		.end		= INTERRUPT_STATUS,
  		.flags		= IORESOURCE_IO,	},
  	{	.name		= vrc4171_card_name,
  		.start		= CONFIGURATION1,
  		.end		= CONFIGURATION1,
  		.flags		= IORESOURCE_IO,	},
  };
  
  static struct platform_device vrc4171_card_device = {
  	.name		= vrc4171_card_name,
  	.id		= 0,
  	.num_resources	= 3,
  	.resource	= vrc4171_card_resource,
  };
  
  static inline uint16_t vrc4171_get_irq_status(void)
  {
  	return inw(INTERRUPT_STATUS);
  }

  static inline void vrc4171_set_multifunction_pin(enum vrc4171_slotb config)

  {
  	uint16_t config1;
  
  	config1 = inw(CONFIGURATION1);
  	config1 &= ~SLOTB_CONFIG;
  
  	switch (config) {
  	case SLOTB_IS_NONE:
  		config1 |= SLOTB_NONE;
  		break;
  	case SLOTB_IS_PCCARD:
  		config1 |= SLOTB_PCCARD;
  		break;
  	case SLOTB_IS_CF:
  		config1 |= SLOTB_CF;
  		break;
  	case SLOTB_IS_FLASHROM:
  		config1 |= SLOTB_FLASHROM;
  		break;
  	default:
  		break;
  	}
  
  	outw(config1, CONFIGURATION1);
  }
  
  static inline uint8_t exca_read_byte(int slot, uint8_t index)
  {
  	if (slot == CARD_SLOTB)
  		index += CARD_SLOTB_OFFSET;
  
  	outb(index, CARD_CONTROLLER_INDEX);
  	return inb(CARD_CONTROLLER_DATA);
  }
  
  static inline uint16_t exca_read_word(int slot, uint8_t index)
  {
  	uint16_t data;
  
  	if (slot == CARD_SLOTB)
  		index += CARD_SLOTB_OFFSET;
  
  	outb(index++, CARD_CONTROLLER_INDEX);
  	data = inb(CARD_CONTROLLER_DATA);
  
  	outb(index, CARD_CONTROLLER_INDEX);
  	data |= ((uint16_t)inb(CARD_CONTROLLER_DATA)) << 8;
  
  	return data;
  }
  
  static inline uint8_t exca_write_byte(int slot, uint8_t index, uint8_t data)
  {
  	if (slot == CARD_SLOTB)
  		index += CARD_SLOTB_OFFSET;
  
  	outb(index, CARD_CONTROLLER_INDEX);
  	outb(data, CARD_CONTROLLER_DATA);
  
  	return data;
  }
  
  static inline uint16_t exca_write_word(int slot, uint8_t index, uint16_t data)
  {
  	if (slot == CARD_SLOTB)
  		index += CARD_SLOTB_OFFSET;
  
  	outb(index++, CARD_CONTROLLER_INDEX);
  	outb(data, CARD_CONTROLLER_DATA);
  
  	outb(index, CARD_CONTROLLER_INDEX);
  	outb((uint8_t)(data >> 8), CARD_CONTROLLER_DATA);
  
  	return data;
  }
  
  static inline int search_nonuse_irq(void)
  {
  	int i;
  
  	for (i = 0; i < 16; i++) {
  		if (vrc4171_irq_mask & (1 << i)) {
  			vrc4171_irq_mask &= ~(1 << i);
  			return i;
  		}
  	}
  
  	return -1;
  }
  
  static int pccard_init(struct pcmcia_socket *sock)
  {

  	struct vrc4171_socket *socket;

  	unsigned int slot;
  
  	sock->features |= SS_CAP_PCCARD | SS_CAP_PAGE_REGS;
  	sock->irq_mask = 0;
  	sock->map_size = 0x1000;
  	sock->pci_irq = vrc4171_irq;
  
  	slot = sock->sock;
  	socket = &vrc4171_sockets[slot];
  	socket->csc_irq = search_nonuse_irq();
  	socket->io_irq = search_nonuse_irq();

  	spin_lock_init(&socket->lock);

  
  	return 0;
  }
  
  static int pccard_get_status(struct pcmcia_socket *sock, u_int *value)
  {
  	unsigned int slot;
  	uint8_t status, sense;
  	u_int val = 0;
  
  	if (sock == NULL || sock->sock >= CARD_MAX_SLOTS || value == NULL)
  		return -EINVAL;
  
  	slot = sock->sock;
  
  	status = exca_read_byte(slot, I365_STATUS);
  	if (exca_read_byte(slot, I365_INTCTL) & I365_PC_IOCARD) {
  		if (status & I365_CS_STSCHG)
  			val |= SS_STSCHG;
  	} else {
  		if (!(status & I365_CS_BVD1))
  			val |= SS_BATDEAD;
  		else if ((status & (I365_CS_BVD1 | I365_CS_BVD2)) == I365_CS_BVD1)
  			val |= SS_BATWARN;
  	}
  	if ((status & I365_CS_DETECT) == I365_CS_DETECT)
  		val |= SS_DETECT;
  	if (status & I365_CS_WRPROT)
  		val |= SS_WRPROT;
  	if (status & I365_CS_READY)
  		val |= SS_READY;
  	if (status & I365_CS_POWERON)
  		val |= SS_POWERON;
  
  	sense = exca_read_byte(slot, CARD_VOLTAGE_SENSE);
  	switch (sense) {
  	case VCC_3VORXV_CAPABLE:
  		val |= SS_3VCARD | SS_XVCARD;
  		break;
  	case VCC_XV_ONLY:
  		val |= SS_XVCARD;
  		break;
  	case VCC_3V_CAPABLE:
  		val |= SS_3VCARD;
  		break;
  	default:
  		/* 5V only */
  		break;
  	}
  
  	*value = val;
  
  	return 0;
  }

  static inline uint8_t set_Vcc_value(u_char Vcc)
  {
  	switch (Vcc) {
  	case 33:
  		return VCC_3V;
  	case 50:
  		return VCC_5V;
  	}
  
  	/* Small voltage is chosen for safety. */
  	return VCC_3V;
  }
  
  static int pccard_set_socket(struct pcmcia_socket *sock, socket_state_t *state)
  {

  	struct vrc4171_socket *socket;

  	unsigned int slot;
  	uint8_t voltage, power, control, cscint;
  
  	if (sock == NULL || sock->sock >= CARD_MAX_SLOTS ||
  	    (state->Vpp != state->Vcc && state->Vpp != 0) ||
  	    (state->Vcc != 50 && state->Vcc != 33 && state->Vcc != 0))
  		return -EINVAL;
  
  	slot = sock->sock;
  	socket = &vrc4171_sockets[slot];

  	spin_lock_irq(&socket->lock);

  
  	voltage = set_Vcc_value(state->Vcc);
  	exca_write_byte(slot, CARD_VOLTAGE_SELECT, voltage);
  
  	power = POWER_ENABLE;
  	if (state->Vpp == state->Vcc)
  		power |= VPP_GET_VCC;
  	if (state->flags & SS_OUTPUT_ENA)
  		power |= I365_PWR_OUT;
  	exca_write_byte(slot, I365_POWER, power);
  
  	control = 0;
  	if (state->io_irq != 0)
  		control |= socket->io_irq;
  	if (state->flags & SS_IOCARD)
  		control |= I365_PC_IOCARD;
  	if (state->flags & SS_RESET)
  		control	&= ~I365_PC_RESET;
  	else
  		control |= I365_PC_RESET;
  	exca_write_byte(slot, I365_INTCTL, control);
  
          cscint = 0;
          exca_write_byte(slot, I365_CSCINT, cscint);
  	exca_read_byte(slot, I365_CSC);	/* clear CardStatus change */
  	if (state->csc_mask != 0)
  		cscint |= socket->csc_irq << 8;
  	if (state->flags & SS_IOCARD) {
  		if (state->csc_mask & SS_STSCHG)
  			cscint |= I365_CSC_STSCHG;
  	} else {
  		if (state->csc_mask & SS_BATDEAD)
  			cscint |= I365_CSC_BVD1;
  		if (state->csc_mask & SS_BATWARN)
  			cscint |= I365_CSC_BVD2;
  	}
  	if (state->csc_mask & SS_READY)
  		cscint |= I365_CSC_READY;
  	if (state->csc_mask & SS_DETECT)
  		cscint |= I365_CSC_DETECT;
          exca_write_byte(slot, I365_CSCINT, cscint);

  	spin_unlock_irq(&socket->lock);

  
  	return 0;
  }
  
  static int pccard_set_io_map(struct pcmcia_socket *sock, struct pccard_io_map *io)
  {
  	unsigned int slot;
  	uint8_t ioctl, addrwin;
  	u_char map;
  
  	if (sock == NULL || sock->sock >= CARD_MAX_SLOTS ||
  	    io == NULL || io->map >= IO_MAX_MAPS ||
  	    io->start > 0xffff || io->stop > 0xffff || io->start > io->stop)
  		return -EINVAL;
  
  	slot = sock->sock;
  	map = io->map;
  
  	addrwin = exca_read_byte(slot, I365_ADDRWIN);
  	if (addrwin & I365_ENA_IO(map)) {
  		addrwin &= ~I365_ENA_IO(map);
  		exca_write_byte(slot, I365_ADDRWIN, addrwin);
  	}
  
  	exca_write_word(slot, I365_IO(map)+I365_W_START, io->start);
  	exca_write_word(slot, I365_IO(map)+I365_W_STOP, io->stop);
  
  	ioctl = 0;
  	if (io->speed > 0)
  		ioctl |= I365_IOCTL_WAIT(map);
  	if (io->flags & MAP_16BIT)
  		ioctl |= I365_IOCTL_16BIT(map);
  	if (io->flags & MAP_AUTOSZ)
  		ioctl |= I365_IOCTL_IOCS16(map);
  	if (io->flags & MAP_0WS)
  		ioctl |= I365_IOCTL_0WS(map);
  	exca_write_byte(slot, I365_IOCTL, ioctl);
  
  	if (io->flags & MAP_ACTIVE) {
  		addrwin |= I365_ENA_IO(map);
  		exca_write_byte(slot, I365_ADDRWIN, addrwin);
  	}
  
  	return 0;
  }
  
  static int pccard_set_mem_map(struct pcmcia_socket *sock, struct pccard_mem_map *mem)
  {
  	unsigned int slot;
  	uint16_t start, stop, offset;
  	uint8_t addrwin;
  	u_char map;
  
  	if (sock == NULL || sock->sock >= CARD_MAX_SLOTS ||
  	    mem == NULL || mem->map >= MEM_MAX_MAPS ||
  	    mem->res->start < CARD_MEM_START || mem->res->start > CARD_MEM_END ||
  	    mem->res->end < CARD_MEM_START || mem->res->end > CARD_MEM_END ||
  	    mem->res->start > mem->res->end ||
  	    mem->card_start > CARD_MAX_MEM_OFFSET ||
  	    mem->speed > CARD_MAX_MEM_SPEED)
  		return -EINVAL;
  
  	slot = sock->sock;
  	map = mem->map;
  
  	addrwin = exca_read_byte(slot, I365_ADDRWIN);
  	if (addrwin & I365_ENA_MEM(map)) {
  		addrwin &= ~I365_ENA_MEM(map);
  		exca_write_byte(slot, I365_ADDRWIN, addrwin);
  	}
  
  	start = (mem->res->start >> 12) & 0x3fff;
  	if (mem->flags & MAP_16BIT)
  		start |= I365_MEM_16BIT;
  	exca_write_word(slot, I365_MEM(map)+I365_W_START, start);
  
  	stop = (mem->res->end >> 12) & 0x3fff;
  	switch (mem->speed) {
  	case 0:
  		break;
  	case 1:
  		stop |= I365_MEM_WS0;
  		break;
  	case 2:
  		stop |= I365_MEM_WS1;
  		break;
  	default:
  		stop |= I365_MEM_WS0 | I365_MEM_WS1;
  		break;
  	}
  	exca_write_word(slot, I365_MEM(map)+I365_W_STOP, stop);
  
  	offset = (mem->card_start >> 12) & 0x3fff;
  	if (mem->flags & MAP_ATTRIB)
  		offset |= I365_MEM_REG;
  	if (mem->flags & MAP_WRPROT)
  		offset |= I365_MEM_WRPROT;
  	exca_write_word(slot, I365_MEM(map)+I365_W_OFF, offset);
  
  	if (mem->flags & MAP_ACTIVE) {
  		addrwin |= I365_ENA_MEM(map);
  		exca_write_byte(slot, I365_ADDRWIN, addrwin);
  	}
  
  	return 0;
  }
  
  static struct pccard_operations vrc4171_pccard_operations = {
  	.init			= pccard_init,
  	.get_status		= pccard_get_status,

  	.set_socket		= pccard_set_socket,
  	.set_io_map		= pccard_set_io_map,
  	.set_mem_map		= pccard_set_mem_map,
  };
  
  static inline unsigned int get_events(int slot)
  {
  	unsigned int events = 0;
  	uint8_t status, csc;
  
  	status = exca_read_byte(slot, I365_STATUS);
  	csc = exca_read_byte(slot, I365_CSC);
  
  	if (exca_read_byte(slot, I365_INTCTL) & I365_PC_IOCARD) {
  		if ((csc & I365_CSC_STSCHG) && (status & I365_CS_STSCHG))
  			events |= SS_STSCHG;
  	} else {
  		if (csc & (I365_CSC_BVD1 | I365_CSC_BVD2)) {
  			if (!(status & I365_CS_BVD1))
  				events |= SS_BATDEAD;
  			else if ((status & (I365_CS_BVD1 | I365_CS_BVD2)) == I365_CS_BVD1)
  				events |= SS_BATWARN;
  		}
  	}
  	if ((csc & I365_CSC_READY) && (status & I365_CS_READY))
  		events |= SS_READY;
  	if ((csc & I365_CSC_DETECT) && ((status & I365_CS_DETECT) == I365_CS_DETECT))
  		events |= SS_DETECT;
  
  	return events;
  }

  static irqreturn_t pccard_interrupt(int irq, void *dev_id)

  {

  	struct vrc4171_socket *socket;

  	unsigned int events;
  	irqreturn_t retval = IRQ_NONE;
  	uint16_t status;
  
  	status = vrc4171_get_irq_status();
  	if (status & IRQ_A) {
  		socket = &vrc4171_sockets[CARD_SLOTA];
  		if (socket->slot == SLOT_INITIALIZED) {
  			if (status & (1 << socket->csc_irq)) {
  				events = get_events(CARD_SLOTA);
  				if (events != 0) {
  					pcmcia_parse_events(&socket->pcmcia_socket, events);
  					retval = IRQ_HANDLED;
  				}
  			}
  		}
  	}
  
  	if (status & IRQ_B) {
  		socket = &vrc4171_sockets[CARD_SLOTB];
  		if (socket->slot == SLOT_INITIALIZED) {
  			if (status & (1 << socket->csc_irq)) {
  				events = get_events(CARD_SLOTB);
  				if (events != 0) {
  					pcmcia_parse_events(&socket->pcmcia_socket, events);
  					retval = IRQ_HANDLED;
  				}
  			}
  		}
  	}
  
  	return retval;
  }
  
  static inline void reserve_using_irq(int slot)
  {
  	unsigned int irq;
  
  	irq = exca_read_byte(slot, I365_INTCTL);
  	irq &= 0x0f;
  	vrc4171_irq_mask &= ~(1 << irq);
  
  	irq = exca_read_byte(slot, I365_CSCINT);
  	irq = (irq & 0xf0) >> 4;
  	vrc4171_irq_mask &= ~(1 << irq);
  }

  static int vrc4171_add_sockets(void)

  {

  	struct vrc4171_socket *socket;

  	int slot, retval;
  
  	for (slot = 0; slot < CARD_MAX_SLOTS; slot++) {
  		if (slot == CARD_SLOTB && vrc4171_slotb == SLOTB_IS_NONE)
  			continue;
  
  		socket = &vrc4171_sockets[slot];
  		if (socket->slot != SLOT_PROBE) {
  			uint8_t addrwin;
  
  			switch (socket->slot) {
  			case SLOT_NOPROBE_MEM:
  				addrwin = exca_read_byte(slot, I365_ADDRWIN);
  				addrwin &= 0x1f;
  				exca_write_byte(slot, I365_ADDRWIN, addrwin);
  				break;
  			case SLOT_NOPROBE_IO:
  				addrwin = exca_read_byte(slot, I365_ADDRWIN);
  				addrwin &= 0xc0;
  				exca_write_byte(slot, I365_ADDRWIN, addrwin);
  				break;
  			default:
  				break;
  			}
  
  			reserve_using_irq(slot);
  			continue;
  		}
  
  		sprintf(socket->name, "NEC VRC4171 Card Slot %1c", 'A' + slot);

  		socket->pcmcia_socket.dev.parent = &vrc4171_card_device.dev;

  		socket->pcmcia_socket.ops = &vrc4171_pccard_operations;
  		socket->pcmcia_socket.owner = THIS_MODULE;
  
  		retval = pcmcia_register_socket(&socket->pcmcia_socket);
  		if (retval < 0)
  			return retval;
  
  		exca_write_byte(slot, I365_ADDRWIN, 0);
  		exca_write_byte(slot, GLOBAL_CONTROL, 0);
  
  		socket->slot = SLOT_INITIALIZED;
  	}
  
  	return 0;
  }
  
  static void vrc4171_remove_sockets(void)
  {

  	struct vrc4171_socket *socket;

  	int slot;
  
  	for (slot = 0; slot < CARD_MAX_SLOTS; slot++) {
  		if (slot == CARD_SLOTB && vrc4171_slotb == SLOTB_IS_NONE)
  			continue;
  
  		socket = &vrc4171_sockets[slot];
  		if (socket->slot == SLOT_INITIALIZED)
  			pcmcia_unregister_socket(&socket->pcmcia_socket);
  
  		socket->slot = SLOT_PROBE;
  	}
  }

  static int vrc4171_card_setup(char *options)

  {
  	if (options == NULL || *options == '\0')

  		return 1;

  
  	if (strncmp(options, "irq:", 4) == 0) {
  		int irq;
  		options += 4;
  		irq = simple_strtoul(options, &options, 0);

  		if (irq >= 0 && irq < nr_irqs)

  			vrc4171_irq = irq;
  
  		if (*options != ',')

  			return 1;

  		options++;
  	}
  
  	if (strncmp(options, "slota:", 6) == 0) {
  		options += 6;
  		if (*options != '\0') {
  			if (strncmp(options, "memnoprobe", 10) == 0) {
  				vrc4171_sockets[CARD_SLOTA].slot = SLOT_NOPROBE_MEM;
  				options += 10;
  			} else if (strncmp(options, "ionoprobe", 9) == 0) {
  				vrc4171_sockets[CARD_SLOTA].slot = SLOT_NOPROBE_IO;
  				options += 9;
  			} else if ( strncmp(options, "noprobe", 7) == 0) {
  				vrc4171_sockets[CARD_SLOTA].slot = SLOT_NOPROBE_ALL;
  				options += 7;
  			}
  
  			if (*options != ',')

  				return 1;

  			options++;
  		} else

  			return 1;

  
  	}
  
  	if (strncmp(options, "slotb:", 6) == 0) {
  		options += 6;
  		if (*options != '\0') {
  			if (strncmp(options, "pccard", 6) == 0) {
  				vrc4171_slotb = SLOTB_IS_PCCARD;
  				options += 6;
  			} else if (strncmp(options, "cf", 2) == 0) {
  				vrc4171_slotb = SLOTB_IS_CF;
  				options += 2;
  			} else if (strncmp(options, "flashrom", 8) == 0) {
  				vrc4171_slotb = SLOTB_IS_FLASHROM;
  				options += 8;
  			} else if (strncmp(options, "none", 4) == 0) {
  				vrc4171_slotb = SLOTB_IS_NONE;
  				options += 4;
  			}
  
  			if (*options != ',')

  				return 1;

  			options++;
  
  			if (strncmp(options, "memnoprobe", 10) == 0)
  				vrc4171_sockets[CARD_SLOTB].slot = SLOT_NOPROBE_MEM;
  			if (strncmp(options, "ionoprobe", 9) == 0)
  				vrc4171_sockets[CARD_SLOTB].slot = SLOT_NOPROBE_IO;
  			if (strncmp(options, "noprobe", 7) == 0)
  				vrc4171_sockets[CARD_SLOTB].slot = SLOT_NOPROBE_ALL;
  		}
  	}

  	return 1;

  }
  
  __setup("vrc4171_card=", vrc4171_card_setup);

  static struct platform_driver vrc4171_card_driver = {
  	.driver = {
  		.name		= vrc4171_card_name,

  	},

  };

  static int vrc4171_card_init(void)

  {
  	int retval;

  	retval = platform_driver_register(&vrc4171_card_driver);

  	if (retval < 0)
  		return retval;
  
  	retval = platform_device_register(&vrc4171_card_device);
  	if (retval < 0) {

  		platform_driver_unregister(&vrc4171_card_driver);

  		return retval;
  	}
  
  	vrc4171_set_multifunction_pin(vrc4171_slotb);
  
  	retval = vrc4171_add_sockets();
  	if (retval == 0)

  		retval = request_irq(vrc4171_irq, pccard_interrupt, IRQF_SHARED,

  		                     vrc4171_card_name, vrc4171_sockets);
  
  	if (retval < 0) {
  		vrc4171_remove_sockets();
  		platform_device_unregister(&vrc4171_card_device);

  		platform_driver_unregister(&vrc4171_card_driver);

  		return retval;
  	}

  	printk(KERN_INFO "%s, connected to IRQ %d
  ",
  		vrc4171_card_driver.driver.name, vrc4171_irq);

  
  	return 0;
  }

  static void vrc4171_card_exit(void)

  {
  	free_irq(vrc4171_irq, vrc4171_sockets);
  	vrc4171_remove_sockets();
  	platform_device_unregister(&vrc4171_card_device);

  	platform_driver_unregister(&vrc4171_card_driver);

  }
  
  module_init(vrc4171_card_init);
  module_exit(vrc4171_card_exit);