/*====================================================================== Quatech DAQP PCMCIA data capture cards COMEDI client driver Copyright (C) 2000 Brent Baccala The DAQP interface code in this file is released into the public domain. COMEDI - Linux Control and Measurement Device Interface Copyright (C) 1998 David A. Schleef daqp_cs.c 1.00 Documentation for the DAQP PCMCIA cards can be found on Quatech's site: ftp://ftp.quatech.com/Manuals/daqp-208.pdf This manual is for both the DAQP-208 and the DAQP-308. This code presently doesn't do D/A conversion; only A/D. Also, I've had problems getting interrupts to work reliably, the driver currently polls the card. Multiple DAPQ cards are handled and can be independently attached by specifying a numeric argument to comedi_config. Cards are numbered sequentially from 0 in the order they are inserted/detected. ======================================================================*/ /* Driver: quatech_daqp_cs.o Description: Quatech DAQP PCMCIA data capture cards Author: Brent Baccala Status: unkown Devices: [Quatech] DAQP-208 (daqp), DAQP-308 */ #include #include #include #include #include #include #include /* All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If you do not define PCMCIA_DEBUG at all, all the debug code will be left out. If you compile with PCMCIA_DEBUG=0, the debug code will be present but disabled -- but it can then be enabled for specific modules at load time with a 'pc_debug=#' option to insmod. */ #ifdef PCMCIA_DEBUG static int pc_debug = PCMCIA_DEBUG; MODULE_PARM(pc_debug, "i"); #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args) static char *version = "daqp_cs.c 1.00 2000/10/02 (Brent Baccala)"; #else #define DEBUG(n, args...) #endif /* Maximum number of separate DAQP devices we'll allow */ #define MAX_DEV 4 /* I can't get my DAQP-308 to reliably generate interrupts, so I poll it */ /* #define USE_INTERRUPTS */ /* A dev_link_t structure has fields for most things that are needed to keep track of a socket, but there will usually be some device specific information that also needs to be kept track of. The 'priv' pointer in a dev_link_t structure can be used to point to a device-specific private data structure, like this. To simplify the data structure handling, we actually include the dev_link_t structure in the device's private data structure. A driver needs to provide a dev_node_t structure for each device on a card. In some cases, there is only one device per card (for example, ethernet cards, modems). In other cases, there may be many actual or logical devices (SCSI adapters, memory cards with multiple partitions). The dev_node_t structures need to be kept in a linked list starting at the 'dev' field of a dev_link_t structure. We allocate them in the card's private data structure, because they generally shouldn't be allocated dynamically. We also provide an index into the dev_table */ typedef struct local_info_t { dev_link_t link; dev_node_t node; int stop; int table_index; wait_queue_head_t endofscan; } local_info_t; /* A list of "instances" of the device. */ static local_info_t *dev_table[MAX_DEV] = { NULL, /* ... */ }; /* this is COMEDI's private data structure unique to this hardware driver. Not to be confused with PCMCIA's local_info_t (above). */ typedef struct { int devnum; } daqp_private; #define devpriv ((daqp_private *)dev->private) /*====================================================================*/ /* Parameters that can be set with 'insmod' */ /* The old way: bit map of interrupts to choose from */ /* This means pick from 15, 14, 12, 11, 10, 9, 7, 5, 4, and 3 */ static u_int irq_mask = 0xdeb8; /* Newer, simpler way of listing specific interrupts */ static int irq_list[4] = { -1 }; MODULE_PARM(irq_mask, "i"); MODULE_PARM(irq_list, "1-4i"); /*====================================================================*/ /* The DAQP communicates with the system through a 16 byte I/O window. */ #define DAQP_FIFO_SIZE 4096 #define DAQP_FIFO 0 #define DAQP_SCANLIST 1 #define DAQP_CONTROL 2 #define DAQP_STATUS 2 #define DAQP_DIGITAL_IO 3 #define DAQP_PACER_LOW 4 #define DAQP_PACER_MID 5 #define DAQP_PACER_HIGH 6 #define DAQP_COMMAND 7 #define DAQP_DA 8 #define DAQP_TIMER 10 #define DAQP_AUX 15 #define DAQP_SCANLIST_DIFFERENTIAL 0x4000 #define DAQP_SCANLIST_GAIN(x) ((x)<<12) #define DAQP_SCANLIST_CHANNEL(x) ((x)<<8) #define DAQP_SCANLIST_START 0x0080 #define DAQP_SCANLIST_EXT_GAIN(x) ((x)<<4) #define DAQP_SCANLIST_EXT_CHANNEL(x) (x) #define DAQP_CONTROL_PACER_100kHz 0xc0 #define DAQP_CONTROL_PACER_1MHz 0x80 #define DAQP_CONTROL_PACER_5MHz 0x40 #define DAQP_CONTROL_PACER_EXTERNAL 0x00 #define DAQP_CONTORL_EXPANSION 0x20 #define DAQP_CONTROL_EOS_INT_ENABLE 0x10 #define DAQP_CONTROL_FIFO_INT_ENABLE 0x08 #define DAQP_CONTROL_TRIGGER_ONESHOT 0x00 #define DAQP_CONTROL_TRIGGER_CONTINUOUS 0x04 #define DAQP_CONTROL_TRIGGER_INTERNAL 0x00 #define DAQP_CONTROL_TRIGGER_EXTERNAL 0x02 #define DAQP_CONTROL_TRIGGER_RISING 0x00 #define DAQP_CONTROL_TRIGGER_FALLING 0x01 #define DAQP_STATUS_IDLE 0x80 #define DAQP_STATUS_RUNNING 0x40 #define DAQP_STATUS_DATA_LOST 0x20 #define DAQP_STATUS_END_OF_SCAN 0x10 #define DAQP_STATUS_FIFO_THRESHOLD 0x08 #define DAQP_STATUS_FIFO_FULL 0x04 #define DAQP_STATUS_FIFO_NEARFULL 0x02 #define DAQP_STATUS_FIFO_EMPTY 0x01 #define DAQP_COMMAND_ARM 0x80 #define DAQP_COMMAND_RSTF 0x40 #define DAQP_COMMAND_RSTQ 0x20 #define DAQP_COMMAND_STOP 0x10 #define DAQP_COMMAND_LATCH 0x08 #define DAQP_COMMAND_100kHz 0x00 #define DAQP_COMMAND_50kHz 0x02 #define DAQP_COMMAND_25kHz 0x04 #define DAQP_COMMAND_FIFO_DATA 0x01 #define DAQP_COMMAND_FIFO_PROGRAM 0x00 #define DAQP_AUX_TRIGGER_TTL 0x00 #define DAQP_AUX_TRIGGER_ANALOG 0x80 #define DAQP_AUX_TRIGGER_PRETRIGGER 0x40 #define DAQP_AUX_TIMER_INT_ENABLE 0x20 #define DAQP_AUX_TIMER_RELOAD 0x00 #define DAQP_AUX_TIMER_PAUSE 0x08 #define DAQP_AUX_TIMER_GO 0x10 #define DAQP_AUX_TIMER_GO_EXTERNAL 0x18 #define DAQP_AUX_TIMER_EXTERNAL_SRC 0x04 #define DAQP_AUX_TIMER_INTERNAL_SRC 0x00 #define DAQP_AUX_DA_DIRECT 0x00 #define DAQP_AUX_DA_OVERFLOW 0x01 #define DAQP_AUX_DA_EXTERNAL 0x02 #define DAQP_AUX_DA_PACER 0x03 #define DAQP_AUX_RUNNING 0x80 #define DAQP_AUX_TRIGGERED 0x40 #define DAQP_AUX_DA_BUFFER 0x20 #define DAQP_AUX_TIMER_OVERFLOW 0x10 #define DAQP_AUX_CONVERSION 0x08 #define DAQP_AUX_DATA_LOST 0x04 #define DAQP_AUX_FIFO_NEARFULL 0x02 #define DAQP_AUX_FIFO_EMPTY 0x01 static comedi_lrange range_daqp_ai = { 4, { BIP_RANGE( 10 ), BIP_RANGE( 5 ), BIP_RANGE( 2.5 ), BIP_RANGE( 1.25 ) }}; /*====================================================================*/ /* comedi interface code */ static int daqp_attach(comedi_device *dev,comedi_devconfig *it); static int daqp_detach(comedi_device *dev); static comedi_driver driver_daqp={ driver_name: "daqp", module: THIS_MODULE, attach: daqp_attach, detach: daqp_detach, }; static void daqp_dump(comedi_device *dev) { printk("DAQP: status %02x; aux status %02x\n", inb(dev->iobase + DAQP_STATUS), inb(dev->iobase + DAQP_AUX)); } static int daqp_ai_insn_read(comedi_device *dev,comedi_subdevice *s, comedi_insn *insn,lsampl_t *data) { local_info_t *local; int i; int v; int counter=10000; #ifdef USE_INTERRUPTS int threshold; int flags; int timeout; #endif if (!dev_table[devpriv->devnum] || dev_table[devpriv->devnum]->stop) { return -EIO; } else { local = dev_table[devpriv->devnum]; } /* Stop any running conversion */ outb(DAQP_COMMAND_STOP, dev->iobase+DAQP_COMMAND); outb(0, dev->iobase+DAQP_AUX); /* Reset scan list queue */ outb(DAQP_COMMAND_RSTQ, dev->iobase+DAQP_COMMAND); /* Program one scan list entry */ v = DAQP_SCANLIST_CHANNEL(CR_CHAN(insn->chanspec)) | DAQP_SCANLIST_GAIN(CR_RANGE(insn->chanspec)); if (CR_AREF(insn->chanspec) == AREF_DIFF) { v |= DAQP_SCANLIST_DIFFERENTIAL; } v |= DAQP_SCANLIST_START; outb(v & 0xff, dev->iobase + DAQP_SCANLIST); outb(v >> 8, dev->iobase + DAQP_SCANLIST); /* Reset data FIFO (see page 28 of DAQP User's Manual) */ outb(DAQP_COMMAND_RSTF, dev->iobase + DAQP_COMMAND); #ifdef USE_INTERRUPTS /* Set FIFO threshold */ // threshold = DAQP_FIFO_SIZE - 2*it->n_chan; threshold = DAQP_FIFO_SIZE - 1; outb(0, dev->iobase + DAQP_FIFO); outb(0, dev->iobase + DAQP_FIFO); outb(threshold & 0xff, dev->iobase + DAQP_FIFO); outb(threshold >> 8, dev->iobase + DAQP_FIFO); #endif /* Set trigger */ v = DAQP_CONTROL_TRIGGER_ONESHOT | DAQP_CONTROL_TRIGGER_INTERNAL | DAQP_CONTROL_PACER_100kHz; #ifdef USE_INTERRUPTS v |= DAQP_CONTROL_FIFO_INT_ENABLE; #endif outb(v, dev->iobase + DAQP_CONTROL); #ifdef USE_INTERRUPTS save_flags(flags); cli(); #endif /* Start conversion */ outb(DAQP_COMMAND_ARM | DAQP_COMMAND_FIFO_DATA, dev->iobase + DAQP_COMMAND); #ifdef USE_INTERRUPTS timeout = sleep_on_timeout(&local->endofscan, 1*HZ); restore_flags(flags); printk("timeout: %d\n", timeout); #endif i=0; /* Wait for data in FIFO */ while (--counter && (inb(dev->iobase + DAQP_STATUS) & DAQP_STATUS_FIFO_EMPTY)); if (!counter) { printk("DAQP FIFO never got data!\n"); daqp_dump(dev); return -EIO; } else { data[i] = inb(dev->iobase + DAQP_FIFO); data[i] |= inb(dev->iobase + DAQP_FIFO) << 8; data[i] ^= 0x8000; } /* XXX wrong, but I don't know how to fix it --ds */ return 1; } static void daqp_interrupt(int irq, void * dev_id, struct pt_regs *regs) { local_info_t *local = (local_info_t *)dev_id; if (local == NULL) { printk(KERN_WARNING "daqp_interrupt(): irq %d for unknown device.\n", irq); return; } wake_up(&local->endofscan); printk("daqp_interrupt()\n"); } /* daqp_attach is called via comedi_config to attach a comedi device * to a /dev/comedi*. Note that this is different from daqp_cs_attach() * which is called by the pcmcia subsystem to attach the PCMCIA card * when it is inserted. */ static int daqp_attach(comedi_device *dev, comedi_devconfig *it) { int ret; comedi_subdevice *s; if (it->options[0] < 0 || it->options[0] >= MAX_DEV || ! dev_table[it->options[0]]) { printk("comedi%d: No such daqp device %d\n", dev->minor, it->options[0]); return -EIO; } /* Probably should pull this out of PCMCIA CIS tuples */ dev->board_name = "Quatech DAQP"; dev->iobase=dev_table[it->options[0]]->link.io.BasePort1; if((ret=alloc_private(dev,sizeof(daqp_private))) < 0) return ret; devpriv->devnum = it->options[0]; dev->n_subdevices=1; if((ret=alloc_subdevices(dev))<0) return ret; printk("comedi%d: attaching daqp%d (io 0x%04x)\n", dev->minor, it->options[0], dev->iobase); s=dev->subdevices+0; s->type=COMEDI_SUBD_AI; s->subdev_flags=SDF_READABLE|AREF_GROUND|AREF_DIFF; s->n_chan=8; s->maxdata=0xffff; s->range_table=&range_daqp_ai; s->insn_read=daqp_ai_insn_read; return 1; } /* daqp_detach (called from comedi_comdig) does nothing. If the PCMCIA * card is removed, daqp_cs_detach() is called by the pcmcia subsystem. */ static int daqp_detach(comedi_device *dev) { printk("comedi%d: detaching daqp\n",dev->minor); return 0; } /*==================================================================== PCMCIA interface code The rest of the code in this file is based on dummy_cs.c v1.24 from the Linux pcmcia_cs distribution v3.1.8 and is subject to the following license agreement. The remaining contents of this file are subject to the Mozilla Public License Version 1.1 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.mozilla.org/MPL/ Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. The initial developer of the original code is David A. Hinds . Portions created by David A. Hinds are Copyright (C) 1999 David A. Hinds. All Rights Reserved. Alternatively, the contents of this file may be used under the terms of the GNU Public License version 2 (the "GPL"), in which case the provisions of the GPL are applicable instead of the above. If you wish to allow the use of your version of this file only under the terms of the GPL and not to allow others to use your version of this file under the MPL, indicate your decision by deleting the provisions above and replace them with the notice and other provisions required by the GPL. If you do not delete the provisions above, a recipient may use your version of this file under either the MPL or the GPL. ======================================================================*/ /* The event() function is this driver's Card Services event handler. It will be called by Card Services when an appropriate card status event is received. The config() and release() entry points are used to configure or release a socket, in response to card insertion and ejection events. */ static void daqp_cs_config(dev_link_t *link); static void daqp_cs_release(u_long arg); static int daqp_cs_event(event_t event, int priority, event_callback_args_t *args); /* The attach() and detach() entry points are used to create and destroy "instances" of the driver, where each instance represents everything needed to manage one actual PCMCIA card. */ static dev_link_t *daqp_cs_attach(void); static void daqp_cs_detach(dev_link_t *); /* The dev_info variable is the "key" that is used to match up this device driver with appropriate cards, through the card configuration database. */ static dev_info_t dev_info = "daqp_cs"; /*====================================================================*/ static void cs_error(client_handle_t handle, int func, int ret) { error_info_t err = { func, ret }; CardServices(ReportError, handle, &err); } /*====================================================================== daqp_cs_attach() creates an "instance" of the driver, allocating local data structures for one device. The device is registered with Card Services. The dev_link structure is initialized, but we don't actually configure the card at this point -- we wait until we receive a card insertion event. ======================================================================*/ static dev_link_t *daqp_cs_attach(void) { local_info_t *local; dev_link_t *link; client_reg_t client_reg; int ret, i; DEBUG(0, "daqp_cs_attach()\n"); for (i = 0; i < MAX_DEV; i++) if (dev_table[i] == NULL) break; if (i == MAX_DEV) { printk(KERN_NOTICE "daqp_cs: no devices available\n"); return NULL; } /* Allocate space for private device-specific data */ local = kmalloc(sizeof(local_info_t), GFP_KERNEL); if (!local) return NULL; memset(local, 0, sizeof(local_info_t)); local->table_index = i; dev_table[i] = local; link = &local->link; link->priv = local; init_waitqueue_head(&local->endofscan); /* Initialize the dev_link_t structure */ link->release.function = &daqp_cs_release; link->release.data = (u_long)link; /* Interrupt setup */ link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT; link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID; if (irq_list[0] == -1) link->irq.IRQInfo2 = irq_mask; else for (i = 0; i < 4; i++) link->irq.IRQInfo2 |= 1 << irq_list[i]; link->irq.Handler = daqp_interrupt; link->irq.Instance = local; /* General socket configuration defaults can go here. In this client, we assume very little, and rely on the CIS for almost everything. In most clients, many details (i.e., number, sizes, and attributes of IO windows) are fixed by the nature of the device, and can be hard-wired here. */ link->conf.Attributes = 0; link->conf.Vcc = 50; link->conf.IntType = INT_MEMORY_AND_IO; /* Register with Card Services */ client_reg.dev_info = &dev_info; client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE; client_reg.EventMask = CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL | CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET | CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME; client_reg.event_handler = &daqp_cs_event; client_reg.Version = 0x0210; client_reg.event_callback_args.client_data = link; ret = CardServices(RegisterClient, &link->handle, &client_reg); if (ret != CS_SUCCESS) { cs_error(link->handle, RegisterClient, ret); daqp_cs_detach(link); return NULL; } return link; } /* daqp_cs_attach */ /*====================================================================== 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 daqp_cs_detach(dev_link_t *link) { local_info_t *dev = link->priv; DEBUG(0, "daqp_cs_detach(0x%p)\n", link); /* If the device is currently configured and active, we won't actually delete it yet. Instead, it is marked so that when the release() function is called, that will trigger a proper detach(). */ if (link->state & DEV_CONFIG) { #ifdef PCMCIA_DEBUG printk(KERN_DEBUG "daqp_cs: detach postponed, '%s' " "still locked\n", link->dev->dev_name); #endif link->state |= DEV_STALE_LINK; return; } /* Break the link with Card Services */ if (link->handle) CardServices(DeregisterClient, link->handle); /* Unlink device structure, and free it */ dev_table[dev->table_index] = NULL; kfree(dev); } /* daqp_cs_detach */ /*====================================================================== daqp_cs_config() is scheduled to run after a CARD_INSERTION event is received, to configure the PCMCIA socket, and to make the device available to the system. ======================================================================*/ #define CS_CHECK(fn, args...) \ while ((last_ret=CardServices(last_fn=(fn),args))!=0) goto cs_failed #define CFG_CHECK(fn, args...) \ if (CardServices(fn, args) != 0) goto next_entry static void daqp_cs_config(dev_link_t *link) { client_handle_t handle = link->handle; local_info_t *dev = link->priv; tuple_t tuple; cisparse_t parse; int last_fn, last_ret; u_char buf[64]; config_info_t conf; DEBUG(0, "daqp_cs_config(0x%p)\n", link); /* This reads the card's CONFIG tuple to find its configuration registers. */ tuple.DesiredTuple = CISTPL_CONFIG; tuple.Attributes = 0; tuple.TupleData = buf; tuple.TupleDataMax = sizeof(buf); tuple.TupleOffset = 0; CS_CHECK(GetFirstTuple, handle, &tuple); CS_CHECK(GetTupleData, handle, &tuple); CS_CHECK(ParseTuple, handle, &tuple, &parse); link->conf.ConfigBase = parse.config.base; link->conf.Present = parse.config.rmask[0]; /* Configure card */ link->state |= DEV_CONFIG; /* Look up the current Vcc */ CS_CHECK(GetConfigurationInfo, handle, &conf); link->conf.Vcc = conf.Vcc; /* In this loop, we scan the CIS for configuration table entries, each of which describes a valid card configuration, including voltage, IO window, memory window, and interrupt settings. We make no assumptions about the card to be configured: we use just the information available in the CIS. In an ideal world, this would work for any PCMCIA card, but it requires a complete and accurate CIS. In practice, a driver usually "knows" most of these things without consulting the CIS, and most client drivers will only use the CIS to fill in implementation-defined details. */ tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY; CS_CHECK(GetFirstTuple, handle, &tuple); while (1) { cistpl_cftable_entry_t dflt = { 0 }; cistpl_cftable_entry_t *cfg = &(parse.cftable_entry); CFG_CHECK(GetTupleData, handle, &tuple); CFG_CHECK(ParseTuple, handle, &tuple, &parse); if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg; if (cfg->index == 0) goto next_entry; link->conf.ConfigIndex = cfg->index; /* Use power settings for Vcc and Vpp if present */ /* Note that the CIS values need to be rescaled */ if (cfg->vcc.present & (1<vcc.param[CISTPL_POWER_VNOM]/10000) goto next_entry; } else if (dflt.vcc.present & (1<vpp1.present & (1<conf.Vpp1 = link->conf.Vpp2 = cfg->vpp1.param[CISTPL_POWER_VNOM]/10000; else if (dflt.vpp1.present & (1<conf.Vpp1 = link->conf.Vpp2 = dflt.vpp1.param[CISTPL_POWER_VNOM]/10000; /* Do we need to allocate an interrupt? */ if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1) link->conf.Attributes |= CONF_ENABLE_IRQ; /* IO window settings */ link->io.NumPorts1 = link->io.NumPorts2 = 0; if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) { cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io; link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO; if (!(io->flags & CISTPL_IO_8BIT)) link->io.Attributes1 = IO_DATA_PATH_WIDTH_16; if (!(io->flags & CISTPL_IO_16BIT)) link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK; link->io.BasePort1 = io->win[0].base; link->io.NumPorts1 = io->win[0].len; if (io->nwin > 1) { link->io.Attributes2 = link->io.Attributes1; link->io.BasePort2 = io->win[1].base; link->io.NumPorts2 = io->win[1].len; } } /* This reserves IO space but doesn't actually enable it */ CFG_CHECK(RequestIO, link->handle, &link->io); /* If we got this far, we're cool! */ break; next_entry: CS_CHECK(GetNextTuple, handle, &tuple); } /* Allocate an interrupt line. Note that this does not assign a handler to the interrupt, unless the 'Handler' member of the irq structure is initialized. */ if (link->conf.Attributes & CONF_ENABLE_IRQ) CS_CHECK(RequestIRQ, link->handle, &link->irq); /* This actually configures the PCMCIA socket -- setting up the I/O windows and the interrupt mapping, and putting the card and host interface into "Memory and IO" mode. */ CS_CHECK(RequestConfiguration, link->handle, &link->conf); /* At this point, the dev_node_t structure(s) need to be initialized and arranged in a linked list at link->dev. */ sprintf(dev->node.dev_name, "daqp%d", dev->table_index); dev->node.major = dev->node.minor = 0; link->dev = &dev->node; /* Finally, report what we've done */ printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d", dev->node.dev_name, link->conf.ConfigIndex, link->conf.Vcc/10, link->conf.Vcc%10); if (link->conf.Vpp1) printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10); if (link->conf.Attributes & CONF_ENABLE_IRQ) printk(", irq %d", link->irq.AssignedIRQ); if (link->io.NumPorts1) printk(", io 0x%04x-0x%04x", link->io.BasePort1, link->io.BasePort1+link->io.NumPorts1-1); if (link->io.NumPorts2) printk(" & 0x%04x-0x%04x", link->io.BasePort2, link->io.BasePort2+link->io.NumPorts2-1); printk("\n"); link->state &= ~DEV_CONFIG_PENDING; return; cs_failed: cs_error(link->handle, last_fn, last_ret); daqp_cs_release((u_long)link); } /* daqp_cs_config */ /*====================================================================== After a card is removed, daqp_cs_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 daqp_cs_release(u_long arg) { dev_link_t *link = (dev_link_t *)arg; DEBUG(0, "daqp_cs_release(0x%p)\n", link); /* If the device is currently in use, we won't release until it is actually closed, because until then, we can't be sure that no one will try to access the device or its data structures. */ if (link->open) { DEBUG(1, "daqp_cs: release postponed, '%s' still open\n", link->dev->dev_name); link->state |= DEV_STALE_CONFIG; return; } /* Unlink the device chain */ link->dev = NULL; /* In a normal driver, additional code may be needed to release other kernel data structures associated with this device. */ /* Don't bother checking to see if these succeed or not */ CardServices(ReleaseConfiguration, link->handle); if (link->io.NumPorts1) CardServices(ReleaseIO, link->handle, &link->io); if (link->irq.AssignedIRQ) CardServices(ReleaseIRQ, link->handle, &link->irq); link->state &= ~DEV_CONFIG; if (link->state & DEV_STALE_LINK) daqp_cs_detach(link); } /* daqp_cs_release */ /*====================================================================== The card status event handler. Mostly, this schedules other stuff to run after an event is received. When a CARD_REMOVAL event is received, we immediately set a private flag to block future accesses to this device. All the functions that actually access the device should check this flag to make sure the card is still present. ======================================================================*/ static int daqp_cs_event(event_t event, int priority, event_callback_args_t *args) { dev_link_t *link = args->client_data; local_info_t *dev = link->priv; DEBUG(1, "daqp_cs_event(0x%06x)\n", event); switch (event) { case CS_EVENT_CARD_REMOVAL: link->state &= ~DEV_PRESENT; if (link->state & DEV_CONFIG) { dev->stop = 1; link->release.expires = jiffies + HZ/20; add_timer(&link->release); } break; case CS_EVENT_CARD_INSERTION: link->state |= DEV_PRESENT | DEV_CONFIG_PENDING; daqp_cs_config(link); break; case CS_EVENT_PM_SUSPEND: link->state |= DEV_SUSPEND; /* Fall through... */ case CS_EVENT_RESET_PHYSICAL: /* Mark the device as stopped, to block IO until later */ dev->stop = 1; if (link->state & DEV_CONFIG) CardServices(ReleaseConfiguration, link->handle); break; case CS_EVENT_PM_RESUME: link->state &= ~DEV_SUSPEND; /* Fall through... */ case CS_EVENT_CARD_RESET: if (link->state & DEV_CONFIG) CardServices(RequestConfiguration, link->handle, &link->conf); dev->stop = 0; break; } return 0; } /* daqp_cs_event */ /*====================================================================*/ #ifdef MODULE int init_module(void) { servinfo_t serv; DEBUG(0, "%s\n", version); CardServices(GetCardServicesInfo, &serv); if (serv.Revision != CS_RELEASE_CODE) { printk(KERN_NOTICE "daqp_cs: Card Services release " "does not match!\n"); return -1; } register_pccard_driver(&dev_info, &daqp_cs_attach, &daqp_cs_detach); comedi_driver_register(&driver_daqp); return 0; } void cleanup_module(void) { int i; DEBUG(0, "daqp_cs: unloading\n"); comedi_driver_unregister(&driver_daqp); unregister_pccard_driver(&dev_info); for (i=0; i < MAX_DEV; i++) { if (dev_table[i]) { if (dev_table[i]->link.state & DEV_CONFIG) { daqp_cs_release((u_long)(&dev_table[i]->link)); } daqp_cs_detach(&dev_table[i]->link); } } } #endif