drivers/mtd/maps/pcmciamtd.c - pub/scm/linux/kernel/git/mraynal/linux - Git at Google

 /*
  * pcmciamtd.c - MTD driver for PCMCIA flash memory cards
  *
  * Author: Simon Evans <spse@secret.org.uk>
  *
  * Copyright (C) 2002 Simon Evans
  *
  * Licence: GPL
  *
  */

 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/timer.h>
 #include <linux/init.h>
 #include <asm/io.h>

 #include <pcmcia/cistpl.h>
 #include <pcmcia/ds.h>

 #include <linux/mtd/map.h>
 #include <linux/mtd/mtd.h>

 #define info(format, arg...) printk(KERN_INFO "pcmciamtd: " format "\n" , ## arg)

 #define DRIVER_DESC	"PCMCIA Flash memory card driver"

 /* Size of the PCMCIA address space: 26 bits = 64 MB */
 #define MAX_PCMCIA_ADDR	0x4000000

 struct pcmciamtd_dev {
 	struct pcmcia_device	*p_dev;
 	void __iomem	*win_base;	/* ioremapped address of PCMCIA window */
 	unsigned int	win_size;	/* size of window */
 	unsigned int	offset;		/* offset into card the window currently points at */
 	struct map_info	pcmcia_map;
 	struct mtd_info	*mtd_info;
 	int		vpp;
 	char		mtd_name[sizeof(struct cistpl_vers_1_t)];
 };


 /* Module parameters */

 /* 2 = do 16-bit transfers, 1 = do 8-bit transfers */
 static int bankwidth = 2;

 /* Speed of memory accesses, in ns */
 static int mem_speed;

 /* Force the size of an SRAM card */
 static int force_size;

 /* Force Vpp */
 static int vpp;

 /* Set Vpp */
 static int setvpp;

 /* Force card to be treated as FLASH, ROM or RAM */
 static int mem_type;

 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Simon Evans <spse@secret.org.uk>");
 MODULE_DESCRIPTION(DRIVER_DESC);
 module_param(bankwidth, int, 0);
 MODULE_PARM_DESC(bankwidth, "Set bankwidth (1=8 bit, 2=16 bit, default=2)");
 module_param(mem_speed, int, 0);
 MODULE_PARM_DESC(mem_speed, "Set memory access speed in ns");
 module_param(force_size, int, 0);
 MODULE_PARM_DESC(force_size, "Force size of card in MiB (1-64)");
 module_param(setvpp, int, 0);
 MODULE_PARM_DESC(setvpp, "Set Vpp (0=Never, 1=On writes, 2=Always on, default=0)");
 module_param(vpp, int, 0);
 MODULE_PARM_DESC(vpp, "Vpp value in 1/10ths eg 33=3.3V 120=12V (Dangerous)");
 module_param(mem_type, int, 0);
 MODULE_PARM_DESC(mem_type, "Set Memory type (0=Flash, 1=RAM, 2=ROM, default=0)");


 /* read/write{8,16} copy_{from,to} routines with window remapping
  * to access whole card
  */
 static void __iomem *remap_window(struct map_info *map, unsigned long to)
 {
 	struct pcmciamtd_dev *dev = (struct pcmciamtd_dev *)map->map_priv_1;
 	struct resource *win = (struct resource *) map->map_priv_2;
 	unsigned int offset;
 	int ret;

 	if (!pcmcia_dev_present(dev->p_dev)) {
 		pr_debug("device removed\n");
 		return NULL;
 	}

 	offset = to & ~(dev->win_size-1);
 	if (offset != dev->offset) {
 		pr_debug("Remapping window from 0x%8.8x to 0x%8.8x\n",
 		      dev->offset, offset);
 		ret = pcmcia_map_mem_page(dev->p_dev, win, offset);
 		if (ret != 0)
 			return NULL;
 		dev->offset = offset;
 	}
 	return dev->win_base + (to & (dev->win_size-1));
 }


 static map_word pcmcia_read8_remap(struct map_info *map, unsigned long ofs)
 {
 	void __iomem *addr;
 	map_word d = {{0}};

 	addr = remap_window(map, ofs);
 	if(!addr)
 		return d;

 	d.x[0] = readb(addr);
 	pr_debug("ofs = 0x%08lx (%p) data = 0x%02lx\n", ofs, addr, d.x[0]);
 	return d;
 }


 static map_word pcmcia_read16_remap(struct map_info *map, unsigned long ofs)
 {
 	void __iomem *addr;
 	map_word d = {{0}};

 	addr = remap_window(map, ofs);
 	if(!addr)
 		return d;

 	d.x[0] = readw(addr);
 	pr_debug("ofs = 0x%08lx (%p) data = 0x%04lx\n", ofs, addr, d.x[0]);
 	return d;
 }


 static void pcmcia_copy_from_remap(struct map_info *map, void *to, unsigned long from, ssize_t len)
 {
 	struct pcmciamtd_dev *dev = (struct pcmciamtd_dev *)map->map_priv_1;
 	unsigned long win_size = dev->win_size;

 	pr_debug("to = %p from = %lu len = %zd\n", to, from, len);
 	while(len) {
 		int toread = win_size - (from & (win_size-1));
 		void __iomem *addr;

 		if(toread > len)
 			toread = len;

 		addr = remap_window(map, from);
 		if(!addr)
 			return;

 		pr_debug("memcpy from %p to %p len = %d\n", addr, to, toread);
 		memcpy_fromio(to, addr, toread);
 		len -= toread;
 		to += toread;
 		from += toread;
 	}
 }


 static void pcmcia_write8_remap(struct map_info *map, map_word d, unsigned long adr)
 {
 	void __iomem *addr = remap_window(map, adr);

 	if(!addr)
 		return;

 	pr_debug("adr = 0x%08lx (%p)  data = 0x%02lx\n", adr, addr, d.x[0]);
 	writeb(d.x[0], addr);
 }


 static void pcmcia_write16_remap(struct map_info *map, map_word d, unsigned long adr)
 {
 	void __iomem *addr = remap_window(map, adr);
 	if(!addr)
 		return;

 	pr_debug("adr = 0x%08lx (%p)  data = 0x%04lx\n", adr, addr, d.x[0]);
 	writew(d.x[0], addr);
 }


 static void pcmcia_copy_to_remap(struct map_info *map, unsigned long to, const void *from, ssize_t len)
 {
 	struct pcmciamtd_dev *dev = (struct pcmciamtd_dev *)map->map_priv_1;
 	unsigned long win_size = dev->win_size;

 	pr_debug("to = %lu from = %p len = %zd\n", to, from, len);
 	while(len) {
 		int towrite = win_size - (to & (win_size-1));
 		void __iomem *addr;

 		if(towrite > len)
 			towrite = len;

 		addr = remap_window(map, to);
 		if(!addr)
 			return;

 		pr_debug("memcpy from %p to %p len = %d\n", from, addr, towrite);
 		memcpy_toio(addr, from, towrite);
 		len -= towrite;
 		to += towrite;
 		from += towrite;
 	}
 }


 /* read/write{8,16} copy_{from,to} routines with direct access */

 #define DEV_REMOVED(x)  (!(pcmcia_dev_present(((struct pcmciamtd_dev *)map->map_priv_1)->p_dev)))

 static map_word pcmcia_read8(struct map_info *map, unsigned long ofs)
 {
 	void __iomem *win_base = (void __iomem *)map->map_priv_2;
 	map_word d = {{0}};

 	if(DEV_REMOVED(map))
 		return d;

 	d.x[0] = readb(win_base + ofs);
 	pr_debug("ofs = 0x%08lx (%p) data = 0x%02lx\n",
 	      ofs, win_base + ofs, d.x[0]);
 	return d;
 }


 static map_word pcmcia_read16(struct map_info *map, unsigned long ofs)
 {
 	void __iomem *win_base = (void __iomem *)map->map_priv_2;
 	map_word d = {{0}};

 	if(DEV_REMOVED(map))
 		return d;

 	d.x[0] = readw(win_base + ofs);
 	pr_debug("ofs = 0x%08lx (%p) data = 0x%04lx\n",
 	      ofs, win_base + ofs, d.x[0]);
 	return d;
 }


 static void pcmcia_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
 {
 	void __iomem *win_base = (void __iomem *)map->map_priv_2;

 	if(DEV_REMOVED(map))
 		return;

 	pr_debug("to = %p from = %lu len = %zd\n", to, from, len);
 	memcpy_fromio(to, win_base + from, len);
 }


 static void pcmcia_write8(struct map_info *map, map_word d, unsigned long adr)
 {
 	void __iomem *win_base = (void __iomem *)map->map_priv_2;

 	if(DEV_REMOVED(map))
 		return;

 	pr_debug("adr = 0x%08lx (%p)  data = 0x%02lx\n",
 	      adr, win_base + adr, d.x[0]);
 	writeb(d.x[0], win_base + adr);
 }


 static void pcmcia_write16(struct map_info *map, map_word d, unsigned long adr)
 {
 	void __iomem *win_base = (void __iomem *)map->map_priv_2;

 	if(DEV_REMOVED(map))
 		return;

 	pr_debug("adr = 0x%08lx (%p)  data = 0x%04lx\n",
 	      adr, win_base + adr, d.x[0]);
 	writew(d.x[0], win_base + adr);
 }


 static void pcmcia_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
 {
 	void __iomem *win_base = (void __iomem *)map->map_priv_2;

 	if(DEV_REMOVED(map))
 		return;

 	pr_debug("to = %lu from = %p len = %zd\n", to, from, len);
 	memcpy_toio(win_base + to, from, len);
 }


 static DEFINE_SPINLOCK(pcmcia_vpp_lock);
 static int pcmcia_vpp_refcnt;
 static void pcmciamtd_set_vpp(struct map_info *map, int on)
 {
 	struct pcmciamtd_dev *dev = (struct pcmciamtd_dev *)map->map_priv_1;
 	struct pcmcia_device *link = dev->p_dev;
 	unsigned long flags;

 	pr_debug("dev = %p on = %d vpp = %d\n\n", dev, on, dev->vpp);
 	spin_lock_irqsave(&pcmcia_vpp_lock, flags);
 	if (on) {
 		if (++pcmcia_vpp_refcnt == 1)   /* first nested 'on' */
 			pcmcia_fixup_vpp(link, dev->vpp);
 	} else {
 		if (--pcmcia_vpp_refcnt == 0)   /* last nested 'off' */
 			pcmcia_fixup_vpp(link, 0);
 	}
 	spin_unlock_irqrestore(&pcmcia_vpp_lock, flags);
 }


 static void pcmciamtd_release(struct pcmcia_device *link)
 {
 	struct pcmciamtd_dev *dev = link->priv;

 	pr_debug("link = 0x%p\n", link);

 	if (link->resource[2]->end) {
 		if(dev->win_base) {
 			iounmap(dev->win_base);
 			dev->win_base = NULL;
 		}
 	}
 	pcmcia_disable_device(link);
 }


 static int pcmciamtd_cistpl_format(struct pcmcia_device *p_dev,
 				tuple_t *tuple,
 				void *priv_data)
 {
 	cisparse_t parse;

 	if (!pcmcia_parse_tuple(tuple, &parse)) {
 		cistpl_format_t *t = &parse.format;
 		(void)t; /* Shut up, gcc */
 		pr_debug("Format type: %u, Error Detection: %u, offset = %u, length =%u\n",
 			t->type, t->edc, t->offset, t->length);
 	}
 	return -ENOSPC;
 }

 static int pcmciamtd_cistpl_jedec(struct pcmcia_device *p_dev,
 				tuple_t *tuple,
 				void *priv_data)
 {
 	cisparse_t parse;
 	int i;

 	if (!pcmcia_parse_tuple(tuple, &parse)) {
 		cistpl_jedec_t *t = &parse.jedec;
 		for (i = 0; i < t->nid; i++)
 			pr_debug("JEDEC: 0x%02x 0x%02x\n",
 			      t->id[i].mfr, t->id[i].info);
 	}
 	return -ENOSPC;
 }

 static int pcmciamtd_cistpl_device(struct pcmcia_device *p_dev,
 				tuple_t *tuple,
 				void *priv_data)
 {
 	struct pcmciamtd_dev *dev = priv_data;
 	cisparse_t parse;
 	cistpl_device_t *t = &parse.device;
 	int i;

 	if (pcmcia_parse_tuple(tuple, &parse))
 		return -EINVAL;

 	pr_debug("Common memory:\n");
 	dev->pcmcia_map.size = t->dev[0].size;
 	/* from here on: DEBUG only */
 	for (i = 0; i < t->ndev; i++) {
 		pr_debug("Region %d, type = %u\n", i, t->dev[i].type);
 		pr_debug("Region %d, wp = %u\n", i, t->dev[i].wp);
 		pr_debug("Region %d, speed = %u ns\n", i, t->dev[i].speed);
 		pr_debug("Region %d, size = %u bytes\n", i, t->dev[i].size);
 	}
 	return 0;
 }

 static int pcmciamtd_cistpl_geo(struct pcmcia_device *p_dev,
 				tuple_t *tuple,
 				void *priv_data)
 {
 	struct pcmciamtd_dev *dev = priv_data;
 	cisparse_t parse;
 	cistpl_device_geo_t *t = &parse.device_geo;
 	int i;

 	if (pcmcia_parse_tuple(tuple, &parse))
 		return -EINVAL;

 	dev->pcmcia_map.bankwidth = t->geo[0].buswidth;
 	/* from here on: DEBUG only */
 	for (i = 0; i < t->ngeo; i++) {
 		pr_debug("region: %d bankwidth = %u\n", i, t->geo[i].buswidth);
 		pr_debug("region: %d erase_block = %u\n", i, t->geo[i].erase_block);
 		pr_debug("region: %d read_block = %u\n", i, t->geo[i].read_block);
 		pr_debug("region: %d write_block = %u\n", i, t->geo[i].write_block);
 		pr_debug("region: %d partition = %u\n", i, t->geo[i].partition);
 		pr_debug("region: %d interleave = %u\n", i, t->geo[i].interleave);
 	}
 	return 0;
 }


 static void card_settings(struct pcmciamtd_dev *dev, struct pcmcia_device *p_dev, int *new_name)
 {
 	int i;

 	if (p_dev->prod_id[0]) {
 		dev->mtd_name[0] = '\0';
 		for (i = 0; i < 4; i++) {
 			if (i)
 				strcat(dev->mtd_name, " ");
 			if (p_dev->prod_id[i])
 				strcat(dev->mtd_name, p_dev->prod_id[i]);
 		}
 		pr_debug("Found name: %s\n", dev->mtd_name);
 	}

 	pcmcia_loop_tuple(p_dev, CISTPL_FORMAT, pcmciamtd_cistpl_format, NULL);
 	pcmcia_loop_tuple(p_dev, CISTPL_JEDEC_C, pcmciamtd_cistpl_jedec, NULL);
 	pcmcia_loop_tuple(p_dev, CISTPL_DEVICE, pcmciamtd_cistpl_device, dev);
 	pcmcia_loop_tuple(p_dev, CISTPL_DEVICE_GEO, pcmciamtd_cistpl_geo, dev);

 	if(!dev->pcmcia_map.size)
 		dev->pcmcia_map.size = MAX_PCMCIA_ADDR;

 	if(!dev->pcmcia_map.bankwidth)
 		dev->pcmcia_map.bankwidth = 2;

 	if(force_size) {
 		dev->pcmcia_map.size = force_size << 20;
 		pr_debug("size forced to %dM\n", force_size);
 	}

 	if(bankwidth) {
 		dev->pcmcia_map.bankwidth = bankwidth;
 		pr_debug("bankwidth forced to %d\n", bankwidth);
 	}

 	dev->pcmcia_map.name = dev->mtd_name;
 	if(!dev->mtd_name[0]) {
 		strcpy(dev->mtd_name, "PCMCIA Memory card");
 		*new_name = 1;
 	}

 	pr_debug("Device: Size: %lu Width:%d Name: %s\n",
 	      dev->pcmcia_map.size,
 	      dev->pcmcia_map.bankwidth << 3, dev->mtd_name);
 }


 static int pcmciamtd_config(struct pcmcia_device *link)
 {
 	struct pcmciamtd_dev *dev = link->priv;
 	struct mtd_info *mtd = NULL;
 	int ret;
 	int i, j = 0;
 	static char *probes[] = { "jedec_probe", "cfi_probe" };
 	int new_name = 0;

 	pr_debug("link=0x%p\n", link);

 	card_settings(dev, link, &new_name);

 	dev->pcmcia_map.phys = NO_XIP;
 	dev->pcmcia_map.copy_from = pcmcia_copy_from_remap;
 	dev->pcmcia_map.copy_to = pcmcia_copy_to_remap;
 	if (dev->pcmcia_map.bankwidth == 1) {
 		dev->pcmcia_map.read = pcmcia_read8_remap;
 		dev->pcmcia_map.write = pcmcia_write8_remap;
 	} else {
 		dev->pcmcia_map.read = pcmcia_read16_remap;
 		dev->pcmcia_map.write = pcmcia_write16_remap;
 	}
 	if(setvpp == 1)
 		dev->pcmcia_map.set_vpp = pcmciamtd_set_vpp;

 	/* Request a memory window for PCMCIA. Some architeures can map windows
 	 * up to the maximum that PCMCIA can support (64MiB) - this is ideal and
 	 * we aim for a window the size of the whole card - otherwise we try
 	 * smaller windows until we succeed
 	 */

 	link->resource[2]->flags |=  WIN_MEMORY_TYPE_CM | WIN_ENABLE;
 	link->resource[2]->flags |= (dev->pcmcia_map.bankwidth == 1) ?
 					WIN_DATA_WIDTH_8 : WIN_DATA_WIDTH_16;
 	link->resource[2]->start = 0;
 	link->resource[2]->end = (force_size) ? force_size << 20 :
 					MAX_PCMCIA_ADDR;
 	dev->win_size = 0;

 	do {
 		int ret;
 		pr_debug("requesting window with size = %luKiB memspeed = %d\n",
 			(unsigned long) resource_size(link->resource[2]) >> 10,
 			mem_speed);
 		ret = pcmcia_request_window(link, link->resource[2], mem_speed);
 		pr_debug("ret = %d dev->win_size = %d\n", ret, dev->win_size);
 		if(ret) {
 			j++;
 			link->resource[2]->start = 0;
 			link->resource[2]->end = (force_size) ?
 					force_size << 20 : MAX_PCMCIA_ADDR;
 			link->resource[2]->end >>= j;
 		} else {
 			pr_debug("Got window of size %luKiB\n", (unsigned long)
 				resource_size(link->resource[2]) >> 10);
 			dev->win_size = resource_size(link->resource[2]);
 			break;
 		}
 	} while (link->resource[2]->end >= 0x1000);

 	pr_debug("dev->win_size = %d\n", dev->win_size);

 	if(!dev->win_size) {
 		dev_err(&dev->p_dev->dev, "Cannot allocate memory window\n");
 		pcmciamtd_release(link);
 		return -ENODEV;
 	}
 	pr_debug("Allocated a window of %dKiB\n", dev->win_size >> 10);

 	/* Get write protect status */
 	dev->win_base = ioremap(link->resource[2]->start,
 				resource_size(link->resource[2]));
 	if(!dev->win_base) {
 		dev_err(&dev->p_dev->dev, "ioremap(%pR) failed\n",
 			link->resource[2]);
 		pcmciamtd_release(link);
 		return -ENODEV;
 	}
 	pr_debug("mapped window dev = %p @ %pR, base = %p\n",
 	      dev, link->resource[2], dev->win_base);

 	dev->offset = 0;
 	dev->pcmcia_map.map_priv_1 = (unsigned long)dev;
 	dev->pcmcia_map.map_priv_2 = (unsigned long)link->resource[2];

 	dev->vpp = (vpp) ? vpp : link->socket->socket.Vpp;
 	if(setvpp == 2) {
 		link->vpp = dev->vpp;
 	} else {
 		link->vpp = 0;
 	}

 	link->config_index = 0;
 	pr_debug("Setting Configuration\n");
 	ret = pcmcia_enable_device(link);
 	if (ret != 0) {
 		if (dev->win_base) {
 			iounmap(dev->win_base);
 			dev->win_base = NULL;
 		}
 		return -ENODEV;
 	}

 	if(mem_type == 1) {
 		mtd = do_map_probe("map_ram", &dev->pcmcia_map);
 	} else if(mem_type == 2) {
 		mtd = do_map_probe("map_rom", &dev->pcmcia_map);
 	} else {
 		for(i = 0; i < ARRAY_SIZE(probes); i++) {
 			pr_debug("Trying %s\n", probes[i]);
 			mtd = do_map_probe(probes[i], &dev->pcmcia_map);
 			if(mtd)
 				break;

 			pr_debug("FAILED: %s\n", probes[i]);
 		}
 	}

 	if(!mtd) {
 		pr_debug("Can not find an MTD\n");
 		pcmciamtd_release(link);
 		return -ENODEV;
 	}

 	dev->mtd_info = mtd;
 	mtd->owner = THIS_MODULE;

 	if(new_name) {
 		int size = 0;
 		char unit = ' ';
 		/* Since we are using a default name, make it better by adding
 		 * in the size
 		 */
 		if(mtd->size < 1048576) { /* <1MiB in size, show size in KiB */
 			size = mtd->size >> 10;
 			unit = 'K';
 		} else {
 			size = mtd->size >> 20;
 			unit = 'M';
 		}
 		snprintf(dev->mtd_name, sizeof(dev->mtd_name), "%d%ciB %s", size, unit, "PCMCIA Memory card");
 	}

 	/* If the memory found is fits completely into the mapped PCMCIA window,
 	   use the faster non-remapping read/write functions */
 	if(mtd->size <= dev->win_size) {
 		pr_debug("Using non remapping memory functions\n");
 		dev->pcmcia_map.map_priv_2 = (unsigned long)dev->win_base;
 		if (dev->pcmcia_map.bankwidth == 1) {
 			dev->pcmcia_map.read = pcmcia_read8;
 			dev->pcmcia_map.write = pcmcia_write8;
 		} else {
 			dev->pcmcia_map.read = pcmcia_read16;
 			dev->pcmcia_map.write = pcmcia_write16;
 		}
 		dev->pcmcia_map.copy_from = pcmcia_copy_from;
 		dev->pcmcia_map.copy_to = pcmcia_copy_to;
 	}

 	if (mtd_device_register(mtd, NULL, 0)) {
 		map_destroy(mtd);
 		dev->mtd_info = NULL;
 		dev_err(&dev->p_dev->dev,
 			"Could not register the MTD device\n");
 		pcmciamtd_release(link);
 		return -ENODEV;
 	}
 	dev_info(&dev->p_dev->dev, "mtd%d: %s\n", mtd->index, mtd->name);
 	return 0;
 }


 static int pcmciamtd_suspend(struct pcmcia_device *dev)
 {
 	pr_debug("EVENT_PM_RESUME\n");

 	/* get_lock(link); */

 	return 0;
 }

 static int pcmciamtd_resume(struct pcmcia_device *dev)
 {
 	pr_debug("EVENT_PM_SUSPEND\n");

 	/* free_lock(link); */

 	return 0;
 }


 static void pcmciamtd_detach(struct pcmcia_device *link)
 {
 	struct pcmciamtd_dev *dev = link->priv;

 	pr_debug("link=0x%p\n", link);

 	if(dev->mtd_info) {
 		mtd_device_unregister(dev->mtd_info);
 		dev_info(&dev->p_dev->dev, "mtd%d: Removing\n",
 			 dev->mtd_info->index);
 		map_destroy(dev->mtd_info);
 	}

 	pcmciamtd_release(link);
 }


 static int pcmciamtd_probe(struct pcmcia_device *link)
 {
 	struct pcmciamtd_dev *dev;

 	/* Create new memory card device */
 	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 	if (!dev) return -ENOMEM;
 	pr_debug("dev=0x%p\n", dev);

 	dev->p_dev = link;
 	link->priv = dev;

 	return pcmciamtd_config(link);
 }

 static const struct pcmcia_device_id pcmciamtd_ids[] = {
 	PCMCIA_DEVICE_FUNC_ID(1),
 	PCMCIA_DEVICE_PROD_ID123("IO DATA", "PCS-2M", "2MB SRAM", 0x547e66dc, 0x1fed36cd, 0x36eadd21),
 	PCMCIA_DEVICE_PROD_ID12("IBM", "2MB SRAM", 0xb569a6e5, 0x36eadd21),
 	PCMCIA_DEVICE_PROD_ID12("IBM", "4MB FLASH", 0xb569a6e5, 0x8bc54d2a),
 	PCMCIA_DEVICE_PROD_ID12("IBM", "8MB FLASH", 0xb569a6e5, 0x6df1be3e),
 	PCMCIA_DEVICE_PROD_ID12("Intel", "S2E20SW", 0x816cc815, 0xd14c9dcf),
 	PCMCIA_DEVICE_PROD_ID12("Intel", "S2E8 SW", 0x816cc815, 0xa2d7dedb),
 	PCMCIA_DEVICE_PROD_ID12("intel", "SERIES2-02 ", 0x40ade711, 0x145cea5c),
 	PCMCIA_DEVICE_PROD_ID12("intel", "SERIES2-04 ", 0x40ade711, 0x42064dda),
 	PCMCIA_DEVICE_PROD_ID12("intel", "SERIES2-20 ", 0x40ade711, 0x25ee5cb0),
 	PCMCIA_DEVICE_PROD_ID12("intel", "VALUE SERIES 100 ", 0x40ade711, 0xdf8506d8),
 	PCMCIA_DEVICE_PROD_ID12("KINGMAX TECHNOLOGY INC.", "SRAM 256K Bytes", 0x54d0c69c, 0xad12c29c),
 	PCMCIA_DEVICE_PROD_ID12("Maxtor", "MAXFL MobileMax Flash Memory Card", 0xb68968c8, 0x2dfb47b0),
 	PCMCIA_DEVICE_PROD_ID123("M-Systems", "M-SYS Flash Memory Card", "(c) M-Systems", 0x7ed2ad87, 0x675dc3fb, 0x7aef3965),
 	PCMCIA_DEVICE_PROD_ID12("PRETEC", "  2MB SRAM CARD", 0xebf91155, 0x805360ca),
 	PCMCIA_DEVICE_PROD_ID12("PRETEC", "  4MB SRAM CARD", 0xebf91155, 0x20b6bf17),
 	PCMCIA_DEVICE_PROD_ID12("SEIKO EPSON", "WWB101EN20", 0xf9876baf, 0xad0b207b),
 	PCMCIA_DEVICE_PROD_ID12("SEIKO EPSON", "WWB513EN20", 0xf9876baf, 0xe8d884ad),
 	PCMCIA_DEVICE_PROD_ID12("SMART Modular Technologies", " 4MB FLASH Card", 0x96fd8277, 0x737a5b05),
 	PCMCIA_DEVICE_PROD_ID12("Starfish, Inc.", "REX-3000", 0x05ddca47, 0xe7d67bca),
 	PCMCIA_DEVICE_PROD_ID12("Starfish, Inc.", "REX-4100", 0x05ddca47, 0x7bc32944),
 	/* the following was commented out in pcmcia-cs-3.2.7 */
 	/* PCMCIA_DEVICE_PROD_ID12("RATOC Systems,Inc.", "SmartMedia ADAPTER PC Card", 0xf4a2fefe, 0x5885b2ae), */
 #ifdef CONFIG_MTD_PCMCIA_ANONYMOUS
 	{ .match_flags = PCMCIA_DEV_ID_MATCH_ANONYMOUS, },
 #endif
 	PCMCIA_DEVICE_NULL
 };
 MODULE_DEVICE_TABLE(pcmcia, pcmciamtd_ids);

 static struct pcmcia_driver pcmciamtd_driver = {
 	.name		= "pcmciamtd",
 	.probe		= pcmciamtd_probe,
 	.remove		= pcmciamtd_detach,
 	.owner		= THIS_MODULE,
 	.id_table	= pcmciamtd_ids,
 	.suspend	= pcmciamtd_suspend,
 	.resume		= pcmciamtd_resume,
 };


 static int __init init_pcmciamtd(void)
 {
 	if(bankwidth && bankwidth != 1 && bankwidth != 2) {
 		info("bad bankwidth (%d), using default", bankwidth);
 		bankwidth = 2;
 	}
 	if(force_size && (force_size < 1 || force_size > 64)) {
 		info("bad force_size (%d), using default", force_size);
 		force_size = 0;
 	}
 	if(mem_type && mem_type != 1 && mem_type != 2) {
 		info("bad mem_type (%d), using default", mem_type);
 		mem_type = 0;
 	}
 	return pcmcia_register_driver(&pcmciamtd_driver);
 }


 static void __exit exit_pcmciamtd(void)
 {
 	pr_debug(DRIVER_DESC " unloading");
 	pcmcia_unregister_driver(&pcmciamtd_driver);
 }

 module_init(init_pcmciamtd);
 module_exit(exit_pcmciamtd);
	/*
	* pcmciamtd.c - MTD driver for PCMCIA flash memory cards
	*
	* Author: Simon Evans <spse@secret.org.uk>
	*
	* Copyright (C) 2002 Simon Evans
	*
	* Licence: GPL
	*
	*/

	#include <linux/module.h>
	#include <linux/slab.h>
	#include <linux/timer.h>
	#include <linux/init.h>
	#include <asm/io.h>

	#include <pcmcia/cistpl.h>
	#include <pcmcia/ds.h>

	#include <linux/mtd/map.h>
	#include <linux/mtd/mtd.h>

	#define info(format, arg...) printk(KERN_INFO "pcmciamtd: " format "\n" , ## arg)

	#define DRIVER_DESC "PCMCIA Flash memory card driver"

	/* Size of the PCMCIA address space: 26 bits = 64 MB */
	#define MAX_PCMCIA_ADDR 0x4000000

	struct pcmciamtd_dev {
	struct pcmcia_device *p_dev;
	void __iomem win_base; / ioremapped address of PCMCIA window */
	unsigned int win_size; /* size of window */
	unsigned int offset; /* offset into card the window currently points at */
	struct map_info pcmcia_map;
	struct mtd_info *mtd_info;
	int vpp;
	char mtd_name[sizeof(struct cistpl_vers_1_t)];
	};


	/* Module parameters */

	/* 2 = do 16-bit transfers, 1 = do 8-bit transfers */
	static int bankwidth = 2;

	/* Speed of memory accesses, in ns */
	static int mem_speed;

	/* Force the size of an SRAM card */
	static int force_size;

	/* Force Vpp */
	static int vpp;

	/* Set Vpp */
	static int setvpp;

	/* Force card to be treated as FLASH, ROM or RAM */
	static int mem_type;

	MODULE_LICENSE("GPL");
	MODULE_AUTHOR("Simon Evans <spse@secret.org.uk>");
	MODULE_DESCRIPTION(DRIVER_DESC);
	module_param(bankwidth, int, 0);
	MODULE_PARM_DESC(bankwidth, "Set bankwidth (1=8 bit, 2=16 bit, default=2)");
	module_param(mem_speed, int, 0);
	MODULE_PARM_DESC(mem_speed, "Set memory access speed in ns");
	module_param(force_size, int, 0);
	MODULE_PARM_DESC(force_size, "Force size of card in MiB (1-64)");
	module_param(setvpp, int, 0);
	MODULE_PARM_DESC(setvpp, "Set Vpp (0=Never, 1=On writes, 2=Always on, default=0)");
	module_param(vpp, int, 0);
	MODULE_PARM_DESC(vpp, "Vpp value in 1/10ths eg 33=3.3V 120=12V (Dangerous)");
	module_param(mem_type, int, 0);
	MODULE_PARM_DESC(mem_type, "Set Memory type (0=Flash, 1=RAM, 2=ROM, default=0)");


	/* read/write{8,16} copy_{from,to} routines with window remapping
	* to access whole card
	*/
	static void __iomem remap_window(struct map_info map, unsigned long to)
	{
	struct pcmciamtd_dev dev = (struct pcmciamtd_dev )map->map_priv_1;
	struct resource win = (struct resource ) map->map_priv_2;
	unsigned int offset;
	int ret;

	if (!pcmcia_dev_present(dev->p_dev)) {
	pr_debug("device removed\n");
	return NULL;
	}

	offset = to & ~(dev->win_size-1);
	if (offset != dev->offset) {
	pr_debug("Remapping window from 0x%8.8x to 0x%8.8x\n",
	dev->offset, offset);
	ret = pcmcia_map_mem_page(dev->p_dev, win, offset);
	if (ret != 0)
	return NULL;
	dev->offset = offset;
	}
	return dev->win_base + (to & (dev->win_size-1));
	}


	static map_word pcmcia_read8_remap(struct map_info *map, unsigned long ofs)
	{
	void __iomem *addr;
	map_word d = {{0}};

	addr = remap_window(map, ofs);
	if(!addr)
	return d;

	d.x[0] = readb(addr);
	pr_debug("ofs = 0x%08lx (%p) data = 0x%02lx\n", ofs, addr, d.x[0]);
	return d;
	}


	static map_word pcmcia_read16_remap(struct map_info *map, unsigned long ofs)
	{
	void __iomem *addr;
	map_word d = {{0}};

	addr = remap_window(map, ofs);
	if(!addr)
	return d;

	d.x[0] = readw(addr);
	pr_debug("ofs = 0x%08lx (%p) data = 0x%04lx\n", ofs, addr, d.x[0]);
	return d;
	}


	static void pcmcia_copy_from_remap(struct map_info map, void to, unsigned long from, ssize_t len)
	{
	struct pcmciamtd_dev dev = (struct pcmciamtd_dev )map->map_priv_1;
	unsigned long win_size = dev->win_size;

	pr_debug("to = %p from = %lu len = %zd\n", to, from, len);
	while(len) {
	int toread = win_size - (from & (win_size-1));
	void __iomem *addr;

	if(toread > len)
	toread = len;

	addr = remap_window(map, from);
	if(!addr)
	return;

	pr_debug("memcpy from %p to %p len = %d\n", addr, to, toread);
	memcpy_fromio(to, addr, toread);
	len -= toread;
	to += toread;
	from += toread;
	}
	}


	static void pcmcia_write8_remap(struct map_info *map, map_word d, unsigned long adr)
	{
	void __iomem *addr = remap_window(map, adr);

	if(!addr)
	return;

	pr_debug("adr = 0x%08lx (%p) data = 0x%02lx\n", adr, addr, d.x[0]);
	writeb(d.x[0], addr);
	}


	static void pcmcia_write16_remap(struct map_info *map, map_word d, unsigned long adr)
	{
	void __iomem *addr = remap_window(map, adr);
	if(!addr)
	return;

	pr_debug("adr = 0x%08lx (%p) data = 0x%04lx\n", adr, addr, d.x[0]);
	writew(d.x[0], addr);
	}


	static void pcmcia_copy_to_remap(struct map_info map, unsigned long to, const void from, ssize_t len)
	{
	struct pcmciamtd_dev dev = (struct pcmciamtd_dev )map->map_priv_1;
	unsigned long win_size = dev->win_size;

	pr_debug("to = %lu from = %p len = %zd\n", to, from, len);
	while(len) {
	int towrite = win_size - (to & (win_size-1));
	void __iomem *addr;

	if(towrite > len)
	towrite = len;

	addr = remap_window(map, to);
	if(!addr)
	return;

	pr_debug("memcpy from %p to %p len = %d\n", from, addr, towrite);
	memcpy_toio(addr, from, towrite);
	len -= towrite;
	to += towrite;
	from += towrite;
	}
	}


	/* read/write{8,16} copy_{from,to} routines with direct access */

	#define DEV_REMOVED(x) (!(pcmcia_dev_present(((struct pcmciamtd_dev *)map->map_priv_1)->p_dev)))

	static map_word pcmcia_read8(struct map_info *map, unsigned long ofs)
	{
	void __iomem win_base = (void __iomem )map->map_priv_2;
	map_word d = {{0}};

	if(DEV_REMOVED(map))
	return d;

	d.x[0] = readb(win_base + ofs);
	pr_debug("ofs = 0x%08lx (%p) data = 0x%02lx\n",
	ofs, win_base + ofs, d.x[0]);
	return d;
	}


	static map_word pcmcia_read16(struct map_info *map, unsigned long ofs)
	{
	void __iomem win_base = (void __iomem )map->map_priv_2;
	map_word d = {{0}};

	if(DEV_REMOVED(map))
	return d;

	d.x[0] = readw(win_base + ofs);
	pr_debug("ofs = 0x%08lx (%p) data = 0x%04lx\n",
	ofs, win_base + ofs, d.x[0]);
	return d;
	}


	static void pcmcia_copy_from(struct map_info map, void to, unsigned long from, ssize_t len)
	{
	void __iomem win_base = (void __iomem )map->map_priv_2;

	if(DEV_REMOVED(map))
	return;

	pr_debug("to = %p from = %lu len = %zd\n", to, from, len);
	memcpy_fromio(to, win_base + from, len);
	}


	static void pcmcia_write8(struct map_info *map, map_word d, unsigned long adr)
	{
	void __iomem win_base = (void __iomem )map->map_priv_2;

	if(DEV_REMOVED(map))
	return;

	pr_debug("adr = 0x%08lx (%p) data = 0x%02lx\n",
	adr, win_base + adr, d.x[0]);
	writeb(d.x[0], win_base + adr);
	}


	static void pcmcia_write16(struct map_info *map, map_word d, unsigned long adr)
	{
	void __iomem win_base = (void __iomem )map->map_priv_2;

	if(DEV_REMOVED(map))
	return;

	pr_debug("adr = 0x%08lx (%p) data = 0x%04lx\n",
	adr, win_base + adr, d.x[0]);
	writew(d.x[0], win_base + adr);
	}


	static void pcmcia_copy_to(struct map_info map, unsigned long to, const void from, ssize_t len)
	{
	void __iomem win_base = (void __iomem )map->map_priv_2;

	if(DEV_REMOVED(map))
	return;

	pr_debug("to = %lu from = %p len = %zd\n", to, from, len);
	memcpy_toio(win_base + to, from, len);
	}


	static DEFINE_SPINLOCK(pcmcia_vpp_lock);
	static int pcmcia_vpp_refcnt;
	static void pcmciamtd_set_vpp(struct map_info *map, int on)
	{
	struct pcmciamtd_dev dev = (struct pcmciamtd_dev )map->map_priv_1;
	struct pcmcia_device *link = dev->p_dev;
	unsigned long flags;

	pr_debug("dev = %p on = %d vpp = %d\n\n", dev, on, dev->vpp);
	spin_lock_irqsave(&pcmcia_vpp_lock, flags);
	if (on) {
	if (++pcmcia_vpp_refcnt == 1) /* first nested 'on' */
	pcmcia_fixup_vpp(link, dev->vpp);
	} else {
	if (--pcmcia_vpp_refcnt == 0) /* last nested 'off' */
	pcmcia_fixup_vpp(link, 0);
	}
	spin_unlock_irqrestore(&pcmcia_vpp_lock, flags);
	}


	static void pcmciamtd_release(struct pcmcia_device *link)
	{
	struct pcmciamtd_dev *dev = link->priv;

	pr_debug("link = 0x%p\n", link);

	if (link->resource[2]->end) {
	if(dev->win_base) {
	iounmap(dev->win_base);
	dev->win_base = NULL;
	}
	}
	pcmcia_disable_device(link);
	}


	static int pcmciamtd_cistpl_format(struct pcmcia_device *p_dev,
	tuple_t *tuple,
	void *priv_data)
	{
	cisparse_t parse;

	if (!pcmcia_parse_tuple(tuple, &parse)) {
	cistpl_format_t *t = &parse.format;
	(void)t; /* Shut up, gcc */
	pr_debug("Format type: %u, Error Detection: %u, offset = %u, length =%u\n",
	t->type, t->edc, t->offset, t->length);
	}
	return -ENOSPC;
	}

	static int pcmciamtd_cistpl_jedec(struct pcmcia_device *p_dev,
	tuple_t *tuple,
	void *priv_data)
	{
	cisparse_t parse;
	int i;

	if (!pcmcia_parse_tuple(tuple, &parse)) {
	cistpl_jedec_t *t = &parse.jedec;
	for (i = 0; i < t->nid; i++)
	pr_debug("JEDEC: 0x%02x 0x%02x\n",
	t->id[i].mfr, t->id[i].info);
	}
	return -ENOSPC;
	}

	static int pcmciamtd_cistpl_device(struct pcmcia_device *p_dev,
	tuple_t *tuple,
	void *priv_data)
	{
	struct pcmciamtd_dev *dev = priv_data;
	cisparse_t parse;
	cistpl_device_t *t = &parse.device;
	int i;

	if (pcmcia_parse_tuple(tuple, &parse))
	return -EINVAL;

	pr_debug("Common memory:\n");
	dev->pcmcia_map.size = t->dev[0].size;
	/* from here on: DEBUG only */
	for (i = 0; i < t->ndev; i++) {
	pr_debug("Region %d, type = %u\n", i, t->dev[i].type);
	pr_debug("Region %d, wp = %u\n", i, t->dev[i].wp);
	pr_debug("Region %d, speed = %u ns\n", i, t->dev[i].speed);
	pr_debug("Region %d, size = %u bytes\n", i, t->dev[i].size);
	}
	return 0;
	}

	static int pcmciamtd_cistpl_geo(struct pcmcia_device *p_dev,
	tuple_t *tuple,
	void *priv_data)
	{
	struct pcmciamtd_dev *dev = priv_data;
	cisparse_t parse;
	cistpl_device_geo_t *t = &parse.device_geo;
	int i;

	if (pcmcia_parse_tuple(tuple, &parse))
	return -EINVAL;

	dev->pcmcia_map.bankwidth = t->geo[0].buswidth;
	/* from here on: DEBUG only */
	for (i = 0; i < t->ngeo; i++) {
	pr_debug("region: %d bankwidth = %u\n", i, t->geo[i].buswidth);
	pr_debug("region: %d erase_block = %u\n", i, t->geo[i].erase_block);
	pr_debug("region: %d read_block = %u\n", i, t->geo[i].read_block);
	pr_debug("region: %d write_block = %u\n", i, t->geo[i].write_block);
	pr_debug("region: %d partition = %u\n", i, t->geo[i].partition);
	pr_debug("region: %d interleave = %u\n", i, t->geo[i].interleave);
	}
	return 0;
	}


	static void card_settings(struct pcmciamtd_dev dev, struct pcmcia_device p_dev, int *new_name)
	{
	int i;

	if (p_dev->prod_id[0]) {
	dev->mtd_name[0] = '\0';
	for (i = 0; i < 4; i++) {
	if (i)
	strcat(dev->mtd_name, " ");
	if (p_dev->prod_id[i])
	strcat(dev->mtd_name, p_dev->prod_id[i]);
	}
	pr_debug("Found name: %s\n", dev->mtd_name);
	}

	pcmcia_loop_tuple(p_dev, CISTPL_FORMAT, pcmciamtd_cistpl_format, NULL);
	pcmcia_loop_tuple(p_dev, CISTPL_JEDEC_C, pcmciamtd_cistpl_jedec, NULL);
	pcmcia_loop_tuple(p_dev, CISTPL_DEVICE, pcmciamtd_cistpl_device, dev);
	pcmcia_loop_tuple(p_dev, CISTPL_DEVICE_GEO, pcmciamtd_cistpl_geo, dev);

	if(!dev->pcmcia_map.size)
	dev->pcmcia_map.size = MAX_PCMCIA_ADDR;

	if(!dev->pcmcia_map.bankwidth)
	dev->pcmcia_map.bankwidth = 2;

	if(force_size) {
	dev->pcmcia_map.size = force_size << 20;
	pr_debug("size forced to %dM\n", force_size);
	}

	if(bankwidth) {
	dev->pcmcia_map.bankwidth = bankwidth;
	pr_debug("bankwidth forced to %d\n", bankwidth);
	}

	dev->pcmcia_map.name = dev->mtd_name;
	if(!dev->mtd_name[0]) {
	strcpy(dev->mtd_name, "PCMCIA Memory card");
	*new_name = 1;
	}

	pr_debug("Device: Size: %lu Width:%d Name: %s\n",
	dev->pcmcia_map.size,
	dev->pcmcia_map.bankwidth << 3, dev->mtd_name);
	}


	static int pcmciamtd_config(struct pcmcia_device *link)
	{
	struct pcmciamtd_dev *dev = link->priv;
	struct mtd_info *mtd = NULL;
	int ret;
	int i, j = 0;
	static char *probes[] = { "jedec_probe", "cfi_probe" };
	int new_name = 0;

	pr_debug("link=0x%p\n", link);

	card_settings(dev, link, &new_name);

	dev->pcmcia_map.phys = NO_XIP;
	dev->pcmcia_map.copy_from = pcmcia_copy_from_remap;
	dev->pcmcia_map.copy_to = pcmcia_copy_to_remap;
	if (dev->pcmcia_map.bankwidth == 1) {
	dev->pcmcia_map.read = pcmcia_read8_remap;
	dev->pcmcia_map.write = pcmcia_write8_remap;
	} else {
	dev->pcmcia_map.read = pcmcia_read16_remap;
	dev->pcmcia_map.write = pcmcia_write16_remap;
	}
	if(setvpp == 1)
	dev->pcmcia_map.set_vpp = pcmciamtd_set_vpp;

	/* Request a memory window for PCMCIA. Some architeures can map windows
	* up to the maximum that PCMCIA can support (64MiB) - this is ideal and
	* we aim for a window the size of the whole card - otherwise we try
	* smaller windows until we succeed
	*/

	link->resource[2]->flags \|= WIN_MEMORY_TYPE_CM \| WIN_ENABLE;
	link->resource[2]->flags \|= (dev->pcmcia_map.bankwidth == 1) ?
	WIN_DATA_WIDTH_8 : WIN_DATA_WIDTH_16;
	link->resource[2]->start = 0;
	link->resource[2]->end = (force_size) ? force_size << 20 :
	MAX_PCMCIA_ADDR;
	dev->win_size = 0;

	do {
	int ret;
	pr_debug("requesting window with size = %luKiB memspeed = %d\n",
	(unsigned long) resource_size(link->resource[2]) >> 10,
	mem_speed);
	ret = pcmcia_request_window(link, link->resource[2], mem_speed);
	pr_debug("ret = %d dev->win_size = %d\n", ret, dev->win_size);
	if(ret) {
	j++;
	link->resource[2]->start = 0;
	link->resource[2]->end = (force_size) ?
	force_size << 20 : MAX_PCMCIA_ADDR;
	link->resource[2]->end >>= j;
	} else {
	pr_debug("Got window of size %luKiB\n", (unsigned long)
	resource_size(link->resource[2]) >> 10);
	dev->win_size = resource_size(link->resource[2]);
	break;
	}
	} while (link->resource[2]->end >= 0x1000);

	pr_debug("dev->win_size = %d\n", dev->win_size);

	if(!dev->win_size) {
	dev_err(&dev->p_dev->dev, "Cannot allocate memory window\n");
	pcmciamtd_release(link);
	return -ENODEV;
	}
	pr_debug("Allocated a window of %dKiB\n", dev->win_size >> 10);

	/* Get write protect status */
	dev->win_base = ioremap(link->resource[2]->start,
	resource_size(link->resource[2]));
	if(!dev->win_base) {
	dev_err(&dev->p_dev->dev, "ioremap(%pR) failed\n",
	link->resource[2]);
	pcmciamtd_release(link);
	return -ENODEV;
	}
	pr_debug("mapped window dev = %p @ %pR, base = %p\n",
	dev, link->resource[2], dev->win_base);

	dev->offset = 0;
	dev->pcmcia_map.map_priv_1 = (unsigned long)dev;
	dev->pcmcia_map.map_priv_2 = (unsigned long)link->resource[2];

	dev->vpp = (vpp) ? vpp : link->socket->socket.Vpp;
	if(setvpp == 2) {
	link->vpp = dev->vpp;
	} else {
	link->vpp = 0;
	}

	link->config_index = 0;
	pr_debug("Setting Configuration\n");
	ret = pcmcia_enable_device(link);
	if (ret != 0) {
	if (dev->win_base) {
	iounmap(dev->win_base);
	dev->win_base = NULL;
	}
	return -ENODEV;
	}

	if(mem_type == 1) {
	mtd = do_map_probe("map_ram", &dev->pcmcia_map);
	} else if(mem_type == 2) {
	mtd = do_map_probe("map_rom", &dev->pcmcia_map);
	} else {
	for(i = 0; i < ARRAY_SIZE(probes); i++) {
	pr_debug("Trying %s\n", probes[i]);
	mtd = do_map_probe(probes[i], &dev->pcmcia_map);
	if(mtd)
	break;

	pr_debug("FAILED: %s\n", probes[i]);
	}
	}

	if(!mtd) {
	pr_debug("Can not find an MTD\n");
	pcmciamtd_release(link);
	return -ENODEV;
	}

	dev->mtd_info = mtd;
	mtd->owner = THIS_MODULE;

	if(new_name) {
	int size = 0;
	char unit = ' ';
	/* Since we are using a default name, make it better by adding
	* in the size
	*/
	if(mtd->size < 1048576) { /* <1MiB in size, show size in KiB */
	size = mtd->size >> 10;
	unit = 'K';
	} else {
	size = mtd->size >> 20;
	unit = 'M';
	}
	snprintf(dev->mtd_name, sizeof(dev->mtd_name), "%d%ciB %s", size, unit, "PCMCIA Memory card");
	}

	/* If the memory found is fits completely into the mapped PCMCIA window,
	use the faster non-remapping read/write functions */
	if(mtd->size <= dev->win_size) {
	pr_debug("Using non remapping memory functions\n");
	dev->pcmcia_map.map_priv_2 = (unsigned long)dev->win_base;
	if (dev->pcmcia_map.bankwidth == 1) {
	dev->pcmcia_map.read = pcmcia_read8;
	dev->pcmcia_map.write = pcmcia_write8;
	} else {
	dev->pcmcia_map.read = pcmcia_read16;
	dev->pcmcia_map.write = pcmcia_write16;
	}
	dev->pcmcia_map.copy_from = pcmcia_copy_from;
	dev->pcmcia_map.copy_to = pcmcia_copy_to;
	}

	if (mtd_device_register(mtd, NULL, 0)) {
	map_destroy(mtd);
	dev->mtd_info = NULL;
	dev_err(&dev->p_dev->dev,
	"Could not register the MTD device\n");
	pcmciamtd_release(link);
	return -ENODEV;
	}
	dev_info(&dev->p_dev->dev, "mtd%d: %s\n", mtd->index, mtd->name);
	return 0;
	}


	static int pcmciamtd_suspend(struct pcmcia_device *dev)
	{
	pr_debug("EVENT_PM_RESUME\n");

	/* get_lock(link); */

	return 0;
	}

	static int pcmciamtd_resume(struct pcmcia_device *dev)
	{
	pr_debug("EVENT_PM_SUSPEND\n");

	/* free_lock(link); */

	return 0;
	}


	static void pcmciamtd_detach(struct pcmcia_device *link)
	{
	struct pcmciamtd_dev *dev = link->priv;

	pr_debug("link=0x%p\n", link);

	if(dev->mtd_info) {
	mtd_device_unregister(dev->mtd_info);
	dev_info(&dev->p_dev->dev, "mtd%d: Removing\n",
	dev->mtd_info->index);
	map_destroy(dev->mtd_info);
	}

	pcmciamtd_release(link);
	}


	static int pcmciamtd_probe(struct pcmcia_device *link)
	{
	struct pcmciamtd_dev *dev;

	/* Create new memory card device */
	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	if (!dev) return -ENOMEM;
	pr_debug("dev=0x%p\n", dev);

	dev->p_dev = link;
	link->priv = dev;

	return pcmciamtd_config(link);
	}

	static const struct pcmcia_device_id pcmciamtd_ids[] = {
	PCMCIA_DEVICE_FUNC_ID(1),
	PCMCIA_DEVICE_PROD_ID123("IO DATA", "PCS-2M", "2MB SRAM", 0x547e66dc, 0x1fed36cd, 0x36eadd21),
	PCMCIA_DEVICE_PROD_ID12("IBM", "2MB SRAM", 0xb569a6e5, 0x36eadd21),
	PCMCIA_DEVICE_PROD_ID12("IBM", "4MB FLASH", 0xb569a6e5, 0x8bc54d2a),
	PCMCIA_DEVICE_PROD_ID12("IBM", "8MB FLASH", 0xb569a6e5, 0x6df1be3e),
	PCMCIA_DEVICE_PROD_ID12("Intel", "S2E20SW", 0x816cc815, 0xd14c9dcf),
	PCMCIA_DEVICE_PROD_ID12("Intel", "S2E8 SW", 0x816cc815, 0xa2d7dedb),
	PCMCIA_DEVICE_PROD_ID12("intel", "SERIES2-02 ", 0x40ade711, 0x145cea5c),
	PCMCIA_DEVICE_PROD_ID12("intel", "SERIES2-04 ", 0x40ade711, 0x42064dda),
	PCMCIA_DEVICE_PROD_ID12("intel", "SERIES2-20 ", 0x40ade711, 0x25ee5cb0),
	PCMCIA_DEVICE_PROD_ID12("intel", "VALUE SERIES 100 ", 0x40ade711, 0xdf8506d8),
	PCMCIA_DEVICE_PROD_ID12("KINGMAX TECHNOLOGY INC.", "SRAM 256K Bytes", 0x54d0c69c, 0xad12c29c),
	PCMCIA_DEVICE_PROD_ID12("Maxtor", "MAXFL MobileMax Flash Memory Card", 0xb68968c8, 0x2dfb47b0),
	PCMCIA_DEVICE_PROD_ID123("M-Systems", "M-SYS Flash Memory Card", "(c) M-Systems", 0x7ed2ad87, 0x675dc3fb, 0x7aef3965),
	PCMCIA_DEVICE_PROD_ID12("PRETEC", " 2MB SRAM CARD", 0xebf91155, 0x805360ca),
	PCMCIA_DEVICE_PROD_ID12("PRETEC", " 4MB SRAM CARD", 0xebf91155, 0x20b6bf17),
	PCMCIA_DEVICE_PROD_ID12("SEIKO EPSON", "WWB101EN20", 0xf9876baf, 0xad0b207b),
	PCMCIA_DEVICE_PROD_ID12("SEIKO EPSON", "WWB513EN20", 0xf9876baf, 0xe8d884ad),
	PCMCIA_DEVICE_PROD_ID12("SMART Modular Technologies", " 4MB FLASH Card", 0x96fd8277, 0x737a5b05),
	PCMCIA_DEVICE_PROD_ID12("Starfish, Inc.", "REX-3000", 0x05ddca47, 0xe7d67bca),
	PCMCIA_DEVICE_PROD_ID12("Starfish, Inc.", "REX-4100", 0x05ddca47, 0x7bc32944),
	/* the following was commented out in pcmcia-cs-3.2.7 */
	/* PCMCIA_DEVICE_PROD_ID12("RATOC Systems,Inc.", "SmartMedia ADAPTER PC Card", 0xf4a2fefe, 0x5885b2ae), */
	#ifdef CONFIG_MTD_PCMCIA_ANONYMOUS
	{ .match_flags = PCMCIA_DEV_ID_MATCH_ANONYMOUS, },
	#endif
	PCMCIA_DEVICE_NULL
	};
	MODULE_DEVICE_TABLE(pcmcia, pcmciamtd_ids);

	static struct pcmcia_driver pcmciamtd_driver = {
	.name = "pcmciamtd",
	.probe = pcmciamtd_probe,
	.remove = pcmciamtd_detach,
	.owner = THIS_MODULE,
	.id_table = pcmciamtd_ids,
	.suspend = pcmciamtd_suspend,
	.resume = pcmciamtd_resume,
	};


	static int __init init_pcmciamtd(void)
	{
	if(bankwidth && bankwidth != 1 && bankwidth != 2) {
	info("bad bankwidth (%d), using default", bankwidth);
	bankwidth = 2;
	}
	if(force_size && (force_size < 1 \|\| force_size > 64)) {
	info("bad force_size (%d), using default", force_size);
	force_size = 0;
	}
	if(mem_type && mem_type != 1 && mem_type != 2) {
	info("bad mem_type (%d), using default", mem_type);
	mem_type = 0;
	}
	return pcmcia_register_driver(&pcmciamtd_driver);
	}


	static void __exit exit_pcmciamtd(void)
	{
	pr_debug(DRIVER_DESC " unloading");
	pcmcia_unregister_driver(&pcmciamtd_driver);
	}

	module_init(init_pcmciamtd);
	module_exit(exit_pcmciamtd);