diff options
Diffstat (limited to 'drivers/mtd/maps/pcmciamtd.c')
| -rw-r--r-- | drivers/mtd/maps/pcmciamtd.c | 860 |
1 files changed, 860 insertions, 0 deletions
diff --git a/drivers/mtd/maps/pcmciamtd.c b/drivers/mtd/maps/pcmciamtd.c new file mode 100644 index 00000000000..e37b4c1976e --- /dev/null +++ b/drivers/mtd/maps/pcmciamtd.c @@ -0,0 +1,860 @@ +/* + * $Id: pcmciamtd.c,v 1.51 2004/07/12 22:38:29 dwmw2 Exp $ + * + * 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 <asm/system.h> + +#include <pcmcia/version.h> +#include <pcmcia/cs_types.h> +#include <pcmcia/cs.h> +#include <pcmcia/cistpl.h> +#include <pcmcia/ds.h> + +#include <linux/mtd/map.h> +#include <linux/mtd/mtd.h> + +#ifdef CONFIG_MTD_DEBUG +static int debug = CONFIG_MTD_DEBUG_VERBOSE; +MODULE_PARM(debug, "i"); +MODULE_PARM_DESC(debug, "Set Debug Level 0=quiet, 5=noisy"); +#undef DEBUG +#define DEBUG(n, format, arg...) \ + if (n <= debug) { \ + printk(KERN_DEBUG __FILE__ ":%s(): " format "\n", __FUNCTION__ , ## arg); \ + } + +#else +#undef DEBUG +#define DEBUG(n, arg...) +static const int debug = 0; +#endif + +#define err(format, arg...) printk(KERN_ERR "pcmciamtd: " format "\n" , ## arg) +#define info(format, arg...) printk(KERN_INFO "pcmciamtd: " format "\n" , ## arg) +#define warn(format, arg...) printk(KERN_WARNING "pcmciamtd: " format "\n" , ## arg) + + +#define DRIVER_DESC "PCMCIA Flash memory card driver" +#define DRIVER_VERSION "$Revision: 1.51 $" + +/* Size of the PCMCIA address space: 26 bits = 64 MB */ +#define MAX_PCMCIA_ADDR 0x4000000 + +struct pcmciamtd_dev { + dev_link_t link; /* PCMCIA link */ + dev_node_t node; /* device node */ + caddr_t 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)]; +}; + + +static dev_info_t dev_info = "pcmciamtd"; +static dev_link_t *dev_list; + +/* 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_PARM(bankwidth, "i"); +MODULE_PARM_DESC(bankwidth, "Set bankwidth (1=8 bit, 2=16 bit, default=2)"); +MODULE_PARM(mem_speed, "i"); +MODULE_PARM_DESC(mem_speed, "Set memory access speed in ns"); +MODULE_PARM(force_size, "i"); +MODULE_PARM_DESC(force_size, "Force size of card in MiB (1-64)"); +MODULE_PARM(setvpp, "i"); +MODULE_PARM_DESC(setvpp, "Set Vpp (0=Never, 1=On writes, 2=Always on, default=0)"); +MODULE_PARM(vpp, "i"); +MODULE_PARM_DESC(vpp, "Vpp value in 1/10ths eg 33=3.3V 120=12V (Dangerous)"); +MODULE_PARM(mem_type, "i"); +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 caddr_t remap_window(struct map_info *map, unsigned long to) +{ + struct pcmciamtd_dev *dev = (struct pcmciamtd_dev *)map->map_priv_1; + window_handle_t win = (window_handle_t)map->map_priv_2; + memreq_t mrq; + int ret; + + if(!(dev->link.state & DEV_PRESENT)) { + DEBUG(1, "device removed state = 0x%4.4X", dev->link.state); + return 0; + } + + mrq.CardOffset = to & ~(dev->win_size-1); + if(mrq.CardOffset != dev->offset) { + DEBUG(2, "Remapping window from 0x%8.8x to 0x%8.8x", + dev->offset, mrq.CardOffset); + mrq.Page = 0; + if( (ret = pcmcia_map_mem_page(win, &mrq)) != CS_SUCCESS) { + cs_error(dev->link.handle, MapMemPage, ret); + return NULL; + } + dev->offset = mrq.CardOffset; + } + return dev->win_base + (to & (dev->win_size-1)); +} + + +static map_word pcmcia_read8_remap(struct map_info *map, unsigned long ofs) +{ + caddr_t addr; + map_word d = {{0}}; + + addr = remap_window(map, ofs); + if(!addr) + return d; + + d.x[0] = readb(addr); + DEBUG(3, "ofs = 0x%08lx (%p) data = 0x%02x", ofs, addr, d.x[0]); + return d; +} + + +static map_word pcmcia_read16_remap(struct map_info *map, unsigned long ofs) +{ + caddr_t addr; + map_word d = {{0}}; + + addr = remap_window(map, ofs); + if(!addr) + return d; + + d.x[0] = readw(addr); + DEBUG(3, "ofs = 0x%08lx (%p) data = 0x%04x", 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; + + DEBUG(3, "to = %p from = %lu len = %u", to, from, len); + while(len) { + int toread = win_size - (from & (win_size-1)); + caddr_t addr; + + if(toread > len) + toread = len; + + addr = remap_window(map, from); + if(!addr) + return; + + DEBUG(4, "memcpy from %p to %p len = %d", 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) +{ + caddr_t addr = remap_window(map, adr); + + if(!addr) + return; + + DEBUG(3, "adr = 0x%08lx (%p) data = 0x%02x", 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) +{ + caddr_t addr = remap_window(map, adr); + if(!addr) + return; + + DEBUG(3, "adr = 0x%08lx (%p) data = 0x%04x", 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; + + DEBUG(3, "to = %lu from = %p len = %u", to, from, len); + while(len) { + int towrite = win_size - (to & (win_size-1)); + caddr_t addr; + + if(towrite > len) + towrite = len; + + addr = remap_window(map, to); + if(!addr) + return; + + DEBUG(4, "memcpy from %p to %p len = %d", 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) (!(*(u_int *)x->map_priv_1 & DEV_PRESENT)) + +static map_word pcmcia_read8(struct map_info *map, unsigned long ofs) +{ + caddr_t win_base = (caddr_t)map->map_priv_2; + map_word d = {{0}}; + + if(DEV_REMOVED(map)) + return d; + + d.x[0] = readb(win_base + ofs); + DEBUG(3, "ofs = 0x%08lx (%p) data = 0x%02x", ofs, win_base + ofs, d.x[0]); + return d; +} + + +static map_word pcmcia_read16(struct map_info *map, unsigned long ofs) +{ + caddr_t win_base = (caddr_t)map->map_priv_2; + map_word d = {{0}}; + + if(DEV_REMOVED(map)) + return d; + + d.x[0] = readw(win_base + ofs); + DEBUG(3, "ofs = 0x%08lx (%p) data = 0x%04x", 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) +{ + caddr_t win_base = (caddr_t)map->map_priv_2; + + if(DEV_REMOVED(map)) + return; + + DEBUG(3, "to = %p from = %lu len = %u", to, from, len); + memcpy_fromio(to, win_base + from, len); +} + + +static void pcmcia_write8(struct map_info *map, u8 d, unsigned long adr) +{ + caddr_t win_base = (caddr_t)map->map_priv_2; + + if(DEV_REMOVED(map)) + return; + + DEBUG(3, "adr = 0x%08lx (%p) data = 0x%02x", adr, win_base + adr, d); + writeb(d, win_base + adr); +} + + +static void pcmcia_write16(struct map_info *map, u16 d, unsigned long adr) +{ + caddr_t win_base = (caddr_t)map->map_priv_2; + + if(DEV_REMOVED(map)) + return; + + DEBUG(3, "adr = 0x%08lx (%p) data = 0x%04x", adr, win_base + adr, d); + writew(d, win_base + adr); +} + + +static void pcmcia_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len) +{ + caddr_t win_base = (caddr_t)map->map_priv_2; + + if(DEV_REMOVED(map)) + return; + + DEBUG(3, "to = %lu from = %p len = %u", to, from, len); + memcpy_toio(win_base + to, from, len); +} + + +static void pcmciamtd_set_vpp(struct map_info *map, int on) +{ + struct pcmciamtd_dev *dev = (struct pcmciamtd_dev *)map->map_priv_1; + dev_link_t *link = &dev->link; + modconf_t mod; + int ret; + + mod.Attributes = CONF_VPP1_CHANGE_VALID | CONF_VPP2_CHANGE_VALID; + mod.Vcc = 0; + mod.Vpp1 = mod.Vpp2 = on ? dev->vpp : 0; + + DEBUG(2, "dev = %p on = %d vpp = %d\n", dev, on, dev->vpp); + ret = pcmcia_modify_configuration(link->handle, &mod); + if(ret != CS_SUCCESS) { + cs_error(link->handle, ModifyConfiguration, ret); + } +} + + +/* After a card is removed, pcmciamtd_release() will unregister the + * device, and release the PCMCIA configuration. If the device is + * still open, this will be postponed until it is closed. + */ + +static void pcmciamtd_release(dev_link_t *link) +{ + struct pcmciamtd_dev *dev = link->priv; + + DEBUG(3, "link = 0x%p", link); + + if (link->win) { + if(dev->win_base) { + iounmap(dev->win_base); + dev->win_base = NULL; + } + pcmcia_release_window(link->win); + } + pcmcia_release_configuration(link->handle); + link->state &= ~DEV_CONFIG; +} + + +static void card_settings(struct pcmciamtd_dev *dev, dev_link_t *link, int *new_name) +{ + int rc; + tuple_t tuple; + cisparse_t parse; + u_char buf[64]; + + tuple.Attributes = 0; + tuple.TupleData = (cisdata_t *)buf; + tuple.TupleDataMax = sizeof(buf); + tuple.TupleOffset = 0; + tuple.DesiredTuple = RETURN_FIRST_TUPLE; + + rc = pcmcia_get_first_tuple(link->handle, &tuple); + while(rc == CS_SUCCESS) { + rc = pcmcia_get_tuple_data(link->handle, &tuple); + if(rc != CS_SUCCESS) { + cs_error(link->handle, GetTupleData, rc); + break; + } + rc = pcmcia_parse_tuple(link->handle, &tuple, &parse); + if(rc != CS_SUCCESS) { + cs_error(link->handle, ParseTuple, rc); + break; + } + + switch(tuple.TupleCode) { + case CISTPL_FORMAT: { + cistpl_format_t *t = &parse.format; + (void)t; /* Shut up, gcc */ + DEBUG(2, "Format type: %u, Error Detection: %u, offset = %u, length =%u", + t->type, t->edc, t->offset, t->length); + break; + + } + + case CISTPL_DEVICE: { + cistpl_device_t *t = &parse.device; + int i; + DEBUG(2, "Common memory:"); + dev->pcmcia_map.size = t->dev[0].size; + for(i = 0; i < t->ndev; i++) { + DEBUG(2, "Region %d, type = %u", i, t->dev[i].type); + DEBUG(2, "Region %d, wp = %u", i, t->dev[i].wp); + DEBUG(2, "Region %d, speed = %u ns", i, t->dev[i].speed); + DEBUG(2, "Region %d, size = %u bytes", i, t->dev[i].size); + } + break; + } + + case CISTPL_VERS_1: { + cistpl_vers_1_t *t = &parse.version_1; + int i; + if(t->ns) { + dev->mtd_name[0] = '\0'; + for(i = 0; i < t->ns; i++) { + if(i) + strcat(dev->mtd_name, " "); + strcat(dev->mtd_name, t->str+t->ofs[i]); + } + } + DEBUG(2, "Found name: %s", dev->mtd_name); + break; + } + + case CISTPL_JEDEC_C: { + cistpl_jedec_t *t = &parse.jedec; + int i; + for(i = 0; i < t->nid; i++) { + DEBUG(2, "JEDEC: 0x%02x 0x%02x", t->id[i].mfr, t->id[i].info); + } + break; + } + + case CISTPL_DEVICE_GEO: { + cistpl_device_geo_t *t = &parse.device_geo; + int i; + dev->pcmcia_map.bankwidth = t->geo[0].buswidth; + for(i = 0; i < t->ngeo; i++) { + DEBUG(2, "region: %d bankwidth = %u", i, t->geo[i].buswidth); + DEBUG(2, "region: %d erase_block = %u", i, t->geo[i].erase_block); + DEBUG(2, "region: %d read_block = %u", i, t->geo[i].read_block); + DEBUG(2, "region: %d write_block = %u", i, t->geo[i].write_block); + DEBUG(2, "region: %d partition = %u", i, t->geo[i].partition); + DEBUG(2, "region: %d interleave = %u", i, t->geo[i].interleave); + } + break; + } + + default: + DEBUG(2, "Unknown tuple code %d", tuple.TupleCode); + } + + rc = pcmcia_get_next_tuple(link->handle, &tuple); + } + 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; + DEBUG(2, "size forced to %dM", force_size); + } + + if(bankwidth) { + dev->pcmcia_map.bankwidth = bankwidth; + DEBUG(2, "bankwidth forced to %d", bankwidth); + } + + dev->pcmcia_map.name = dev->mtd_name; + if(!dev->mtd_name[0]) { + strcpy(dev->mtd_name, "PCMCIA Memory card"); + *new_name = 1; + } + + DEBUG(1, "Device: Size: %lu Width:%d Name: %s", + dev->pcmcia_map.size, dev->pcmcia_map.bankwidth << 3, dev->mtd_name); +} + + +/* pcmciamtd_config() is scheduled to run after a CARD_INSERTION event + * is received, to configure the PCMCIA socket, and to make the + * MTD device available to the system. + */ + +#define CS_CHECK(fn, ret) \ +do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0) + +static void pcmciamtd_config(dev_link_t *link) +{ + struct pcmciamtd_dev *dev = link->priv; + struct mtd_info *mtd = NULL; + cs_status_t status; + win_req_t req; + int last_ret = 0, last_fn = 0; + int ret; + int i; + config_info_t t; + static char *probes[] = { "jedec_probe", "cfi_probe" }; + cisinfo_t cisinfo; + int new_name = 0; + + DEBUG(3, "link=0x%p", link); + + /* Configure card */ + link->state |= DEV_CONFIG; + + DEBUG(2, "Validating CIS"); + ret = pcmcia_validate_cis(link->handle, &cisinfo); + if(ret != CS_SUCCESS) { + cs_error(link->handle, GetTupleData, ret); + } else { + DEBUG(2, "ValidateCIS found %d chains", cisinfo.Chains); + } + + 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 upto 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 */ + + req.Attributes = WIN_MEMORY_TYPE_CM | WIN_ENABLE; + req.Attributes |= (dev->pcmcia_map.bankwidth == 1) ? WIN_DATA_WIDTH_8 : WIN_DATA_WIDTH_16; + req.Base = 0; + req.AccessSpeed = mem_speed; + link->win = (window_handle_t)link->handle; + req.Size = (force_size) ? force_size << 20 : MAX_PCMCIA_ADDR; + dev->win_size = 0; + + do { + int ret; + DEBUG(2, "requesting window with size = %dKiB memspeed = %d", + req.Size >> 10, req.AccessSpeed); + ret = pcmcia_request_window(&link->handle, &req, &link->win); + DEBUG(2, "ret = %d dev->win_size = %d", ret, dev->win_size); + if(ret) { + req.Size >>= 1; + } else { + DEBUG(2, "Got window of size %dKiB", req.Size >> 10); + dev->win_size = req.Size; + break; + } + } while(req.Size >= 0x1000); + + DEBUG(2, "dev->win_size = %d", dev->win_size); + + if(!dev->win_size) { + err("Cant allocate memory window"); + pcmciamtd_release(link); + return; + } + DEBUG(1, "Allocated a window of %dKiB", dev->win_size >> 10); + + /* Get write protect status */ + CS_CHECK(GetStatus, pcmcia_get_status(link->handle, &status)); + DEBUG(2, "status value: 0x%x window handle = 0x%8.8lx", + status.CardState, (unsigned long)link->win); + dev->win_base = ioremap(req.Base, req.Size); + if(!dev->win_base) { + err("ioremap(%lu, %u) failed", req.Base, req.Size); + pcmciamtd_release(link); + return; + } + DEBUG(1, "mapped window dev = %p req.base = 0x%lx base = %p size = 0x%x", + dev, req.Base, dev->win_base, req.Size); + + dev->offset = 0; + dev->pcmcia_map.map_priv_1 = (unsigned long)dev; + dev->pcmcia_map.map_priv_2 = (unsigned long)link->win; + + DEBUG(2, "Getting configuration"); + CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(link->handle, &t)); + DEBUG(2, "Vcc = %d Vpp1 = %d Vpp2 = %d", t.Vcc, t.Vpp1, t.Vpp2); + dev->vpp = (vpp) ? vpp : t.Vpp1; + link->conf.Attributes = 0; + link->conf.Vcc = t.Vcc; + if(setvpp == 2) { + link->conf.Vpp1 = dev->vpp; + link->conf.Vpp2 = dev->vpp; + } else { + link->conf.Vpp1 = 0; + link->conf.Vpp2 = 0; + } + + link->conf.IntType = INT_MEMORY; + link->conf.ConfigBase = t.ConfigBase; + link->conf.Status = t.Status; + link->conf.Pin = t.Pin; + link->conf.Copy = t.Copy; + link->conf.ExtStatus = t.ExtStatus; + link->conf.ConfigIndex = 0; + link->conf.Present = t.Present; + DEBUG(2, "Setting Configuration"); + ret = pcmcia_request_configuration(link->handle, &link->conf); + if(ret != CS_SUCCESS) { + cs_error(link->handle, RequestConfiguration, ret); + } + + 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 < sizeof(probes) / sizeof(char *); i++) { + DEBUG(1, "Trying %s", probes[i]); + mtd = do_map_probe(probes[i], &dev->pcmcia_map); + if(mtd) + break; + + DEBUG(1, "FAILED: %s", probes[i]); + } + } + + if(!mtd) { + DEBUG(1, "Cant find an MTD"); + pcmciamtd_release(link); + return; + } + + 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) { + DEBUG(1, "Using non remapping memory functions"); + dev->pcmcia_map.map_priv_1 = (unsigned long)&(dev->link.state); + 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(add_mtd_device(mtd)) { + map_destroy(mtd); + dev->mtd_info = NULL; + err("Couldnt register MTD device"); + pcmciamtd_release(link); + return; + } + snprintf(dev->node.dev_name, sizeof(dev->node.dev_name), "mtd%d", mtd->index); + info("mtd%d: %s", mtd->index, mtd->name); + link->state &= ~DEV_CONFIG_PENDING; + link->dev = &dev->node; + return; + + cs_failed: + cs_error(link->handle, last_fn, last_ret); + err("CS Error, exiting"); + pcmciamtd_release(link); + return; +} + + +/* The card status event handler. Mostly, this schedules other + * stuff to run after an event is received. A CARD_REMOVAL event + * also sets some flags to discourage the driver from trying + * to talk to the card any more. + */ + +static int pcmciamtd_event(event_t event, int priority, + event_callback_args_t *args) +{ + dev_link_t *link = args->client_data; + + DEBUG(1, "event=0x%06x", event); + switch (event) { + case CS_EVENT_CARD_REMOVAL: + DEBUG(2, "EVENT_CARD_REMOVAL"); + link->state &= ~DEV_PRESENT; + if (link->state & DEV_CONFIG) { + struct pcmciamtd_dev *dev = link->priv; + if(dev->mtd_info) { + del_mtd_device(dev->mtd_info); + info("mtd%d: Removed", dev->mtd_info->index); + } + pcmciamtd_release(link); + } + break; + case CS_EVENT_CARD_INSERTION: + DEBUG(2, "EVENT_CARD_INSERTION"); + link->state |= DEV_PRESENT | DEV_CONFIG_PENDING; + pcmciamtd_config(link); + break; + case CS_EVENT_PM_SUSPEND: + DEBUG(2, "EVENT_PM_SUSPEND"); + link->state |= DEV_SUSPEND; + /* Fall through... */ + case CS_EVENT_RESET_PHYSICAL: + DEBUG(2, "EVENT_RESET_PHYSICAL"); + /* get_lock(link); */ + break; + case CS_EVENT_PM_RESUME: + DEBUG(2, "EVENT_PM_RESUME"); + link->state &= ~DEV_SUSPEND; + /* Fall through... */ + case CS_EVENT_CARD_RESET: + DEBUG(2, "EVENT_CARD_RESET"); + /* free_lock(link); */ + break; + default: + DEBUG(2, "Unknown event %d", event); + } + return 0; +} + + +/* This deletes a driver "instance". The device is de-registered + * with Card Services. If it has been released, all local data + * structures are freed. Otherwise, the structures will be freed + * when the device is released. + */ + +static void pcmciamtd_detach(dev_link_t *link) +{ + DEBUG(3, "link=0x%p", link); + + if(link->state & DEV_CONFIG) { + pcmciamtd_release(link); + } + + if (link->handle) { + int ret; + DEBUG(2, "Deregistering with card services"); + ret = pcmcia_deregister_client(link->handle); + if (ret != CS_SUCCESS) + cs_error(link->handle, DeregisterClient, ret); + } + + link->state |= DEV_STALE_LINK; +} + + +/* pcmciamtd_attach() creates an "instance" of the driver, allocating + * local data structures for one device. The device is registered + * with Card Services. + */ + +static dev_link_t *pcmciamtd_attach(void) +{ + struct pcmciamtd_dev *dev; + dev_link_t *link; + client_reg_t client_reg; + int ret; + + /* Create new memory card device */ + dev = kmalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) return NULL; + DEBUG(1, "dev=0x%p", dev); + + memset(dev, 0, sizeof(*dev)); + link = &dev->link; + link->priv = dev; + + link->conf.Attributes = 0; + link->conf.IntType = INT_MEMORY; + + link->next = dev_list; + dev_list = link; + + /* Register with Card Services */ + client_reg.dev_info = &dev_info; + client_reg.EventMask = + CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET | + CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL | + CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME; + client_reg.event_handler = &pcmciamtd_event; + client_reg.Version = 0x0210; + client_reg.event_callback_args.client_data = link; + DEBUG(2, "Calling RegisterClient"); + ret = pcmcia_register_client(&link->handle, &client_reg); + if (ret != 0) { + cs_error(link->handle, RegisterClient, ret); + pcmciamtd_detach(link); + return NULL; + } + DEBUG(2, "link = %p", link); + return link; +} + + +static struct pcmcia_driver pcmciamtd_driver = { + .drv = { + .name = "pcmciamtd" + }, + .attach = pcmciamtd_attach, + .detach = pcmciamtd_detach, + .owner = THIS_MODULE +}; + + +static int __init init_pcmciamtd(void) +{ + info(DRIVER_DESC " " DRIVER_VERSION); + + 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) +{ + DEBUG(1, DRIVER_DESC " unloading"); + pcmcia_unregister_driver(&pcmciamtd_driver); + BUG_ON(dev_list != NULL); +} + +module_init(init_pcmciamtd); +module_exit(exit_pcmciamtd); |