ni_labpc.c driver for National Instruments Lab-PC series boards and compatibles
Copyright (C) 2001 Frank Mori Hess <fmhess@users.sourceforge.net>
+ PCMCIA crap at end of file is adapted from dummy_cs.c 1.31 2001/08/24 12:13:13
+ from the pcmcia package.
+ The initial developer of the pcmcia dummy_cs.c code is David A. Hinds
+ <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
+ are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
#include "8255.h"
#include "mite.h"
+#ifdef CONFIG_PCMCIA
+
+//#include <pcmcia/config.h>
+//#include <pcmcia/k_compat.h>
+
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <asm/system.h>
+
+#include <pcmcia/version.h>
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/ds.h>
+#include <pcmcia/bus_ops.h>
+
+/*
+ A linked list of "instances" of the dummy device. Each actual
+ PCMCIA card corresponds to one device instance, and is described
+ by one dev_link_t structure (defined in ds.h).
+
+ You may not want to use a linked list for this -- for example, the
+ memory card driver uses an array of dev_link_t pointers, where minor
+ device numbers are used to derive the corresponding array index.
+*/
+
+static dev_link_t *pcmcia_dev_list = NULL;
+
+#endif // CONFIG_PCMCIA
+
#define LABPC_SIZE 32 // size of io region used by board
#define LABPC_TIMER_BASE 500 // 2 MHz master clock
#define EEPROM_SIZE 256 // 256 byte eeprom
#define DIO_BASE_REG 0x10
#define COUNTER_A_BASE_REG 0x14
#define COUNTER_A_CONTROL_REG (COUNTER_A_BASE_REG + 0x3)
-#define INIT_A0_BITS 0x14 // check modes put conversion pacer output in harmless state (a0 mode 2)\r
+#define INIT_A0_BITS 0x14 // check modes put conversion pacer output in harmless state (a0 mode 2)
#define INIT_A1_BITS 0x70 // put hardware conversion counter output in harmless state (a1 mode 0)
#define COUNTER_B_BASE_REG 0x18
static labpc_board labpc_boards[] =
{
+#ifdef CONFIG_PCMCIA
{
name: "daqcard-1200",
device_id: 0x103, // 0x10b is manufacturer id, 0x103 is device id
ai_range_code: labpc_1200_ai_gain_bits,
ai_range_is_unipolar: labpc_1200_is_unipolar,
},
+#endif // CONFIG_PCMCIA
{
name: "lab-pc-1200",
ai_speed: 10000,
};
MODULE_DEVICE_TABLE(pci, labpc_pci_table);
-/*
- * A convenient macro that defines init_module() and cleanup_module(),
- * as necessary.
- */
-COMEDI_INITCLEANUP(driver_labpc);
-
static int labpc_attach(comedi_device *dev, comedi_devconfig *it)
{
comedi_subdevice *s;
int lsb, msb;
int i;
unsigned long flags, isr_flags;
+#ifdef CONFIG_PCMCIA
+ dev_link_t *link;
+#endif
/* allocate and initialize dev->private */
if(alloc_private(dev, sizeof(labpc_private)) < 0)
irq = mite_irq(devpriv->mite);
break;
case pcmcia_bustype:
- // XXX
- printk("TODO: support pcmicia cards\n");
+#ifdef CONFIG_PCMCIA
+ link = pcmcia_dev_list; /* XXX hack */
+ if(!link) return -EIO;
+ iobase = link->io.BasePort1;
+ irq = link->irq.AssignedIRQ;
+#else
+ printk(" driver was not compiled with pcmcia support\n");
return -EINVAL;
+#endif // CONFIG_PCMCIA
break;
default:
printk("bug! couldn't determine board type\n");\
request_region(iobase, LABPC_SIZE, driver_labpc.driver_name);
}
dev->iobase = iobase;
-\r
- // initialize board's command registers\r
- thisboard->write_byte(devpriv->command1_bits, dev->iobase + COMMAND1_REG);\r
- thisboard->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG);\r
- thisboard->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG);\r
- thisboard->write_byte(devpriv->command4_bits, dev->iobase + COMMAND4_REG);\r
- if(thisboard->register_layout == labpc_1200_layout)\r
- {
- thisboard->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG);\r
- thisboard->write_byte(devpriv->command6_bits, dev->iobase + COMMAND6_REG);\r
- }\r
+
+ // initialize board's command registers
+ thisboard->write_byte(devpriv->command1_bits, dev->iobase + COMMAND1_REG);
+ thisboard->write_byte(devpriv->command2_bits, dev->iobase + COMMAND2_REG);
+ thisboard->write_byte(devpriv->command3_bits, dev->iobase + COMMAND3_REG);
+ thisboard->write_byte(devpriv->command4_bits, dev->iobase + COMMAND4_REG);
+ if(thisboard->register_layout == labpc_1200_layout)
+ {
+ thisboard->write_byte(devpriv->command5_bits, dev->iobase + COMMAND5_REG);
+ thisboard->write_byte(devpriv->command6_bits, dev->iobase + COMMAND6_REG);
+ }
/* grab our IRQ */
if(irq < 0)
s->range_table = &range_labpc_ao;
s->insn_read = labpc_ao_rinsn;
s->insn_write = labpc_ao_winsn;
- /* initialize analog outputs to a known value */\r
+ /* initialize analog outputs to a known value */
for(i = 0; i < s->n_chan; i++)
{
devpriv->ao_value[i] = s->maxdata / 2;
kfree(devpriv->dma_buffer);
if(devpriv->dma_chan)
free_dma(devpriv->dma_chan);
- if(dev->iobase)
+ if(thisboard->bustype != pcmcia_bustype &&
+ dev->iobase)
release_region(dev->iobase, LABPC_SIZE);
if(dev->irq)
comedi_free_irq(dev->irq, dev);
devpriv->command4_bits |= ADC_DIFF_BIT;
thisboard->write_byte(devpriv->command4_bits, dev->iobase + COMMAND4_REG);
- // initialize pacer counter output to make sure it doesn't cause any problems\r
- thisboard->write_byte(INIT_A0_BITS, dev->iobase + COUNTER_A_CONTROL_REG);\r
+ // initialize pacer counter output to make sure it doesn't cause any problems
+ thisboard->write_byte(INIT_A0_BITS, dev->iobase + COUNTER_A_CONTROL_REG);
// clear adc fifo
thisboard->write_byte(0x1, dev->iobase + ADC_CLEAR_REG);
if(channel == 7)
__write_caldac(dev, 13, value);
}
+
+// PCMCIA crap
+#ifdef CONFIG_PCMCIA
+
+/*
+ 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 =
+"ni_labpc.c, based on dummy_cs.c 1.31 2001/08/24 12:13:13";
+#else
+#define DEBUG(n, args...)
+#endif
+
+/*====================================================================*/
+
+/* 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 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. They are invoked from the dummy
+ event handler.
+*/
+
+static void labpc_config(dev_link_t *link);
+static void labpc_release(u_long arg);
+static int labpc_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 *labpc_cs_attach(void);
+static void labpc_cs_detach(dev_link_t *);
+
+/*
+ You'll also need to prototype all the functions that will actually
+ be used to talk to your device. See 'memory_cs' for a good example
+ of a fully self-sufficient driver; the other drivers rely more or
+ less on other parts of the kernel.
+*/
+
+/*
+ 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 = "ni_labpc";
+
+/*
+ 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.
+
+ In this case, we also provide a flag to indicate if a device is
+ "stopped" due to a power management event, or card ejection. The
+ device IO routines can use a flag like this to throttle IO to a
+ card that is not ready to accept it.
+
+ The bus_operations pointer is used on platforms for which we need
+ to use special socket-specific versions of normal IO primitives
+ (inb, outb, readb, writeb, etc) for card IO.
+*/
+
+typedef struct local_info_t {
+ dev_link_t link;
+ dev_node_t node;
+ int stop;
+ struct bus_operations *bus;
+} local_info_t;
+
+/*====================================================================*/
+
+static void cs_error(client_handle_t handle, int func, int ret)
+{
+ error_info_t err = { func, ret };
+ CardServices(ReportError, handle, &err);
+}
+
+/*======================================================================
+
+ labpc_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 *labpc_cs_attach(void)
+{
+ local_info_t *local;
+ dev_link_t *link;
+ client_reg_t client_reg;
+ int ret, i;
+
+ DEBUG(0, "labpc_cs_attach()\n");
+
+ /* 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));
+ link = &local->link; link->priv = local;
+
+ /* Initialize the dev_link_t structure */
+ link->release.function = &labpc_release;
+ link->release.data = (u_long)link;
+
+ /* Interrupt setup */
+ link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
+ 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 = NULL;
+
+ /*
+ 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 */
+ link->next = pcmcia_dev_list;
+ pcmcia_dev_list = link;
+ 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 = &labpc_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);
+ labpc_cs_detach(link);
+ return NULL;
+ }
+
+ return link;
+} /* labpc_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 labpc_cs_detach(dev_link_t *link)
+{
+ dev_link_t **linkp;
+
+ DEBUG(0, "labpc_cs_detach(0x%p)\n", link);
+
+ /* Locate device structure */
+ for (linkp = &pcmcia_dev_list; *linkp; linkp = &(*linkp)->next)
+ if (*linkp == link) break;
+ if (*linkp == NULL)
+ return;
+
+ /*
+ 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 "ni_labpc: 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 */
+ *linkp = link->next;
+ /* This points to the parent local_info_t struct */
+ kfree(link->priv);
+
+} /* labpc_cs_detach */
+
+/*======================================================================
+
+ labpc_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 labpc_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;
+ win_req_t req;
+ memreq_t map;
+ cistpl_cftable_entry_t dflt = { 0 };
+
+ DEBUG(0, "labpc_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 *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;
+
+ /* Does this card need audio output? */
+ if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
+ link->conf.Attributes |= CONF_ENABLE_SPKR;
+ link->conf.Status = CCSR_AUDIO_ENA;
+ }
+
+ /* Use power settings for Vcc and Vpp if present */
+ /* Note that the CIS values need to be rescaled */
+ if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM)) {
+ if (conf.Vcc != cfg->vcc.param[CISTPL_POWER_VNOM]/10000)
+ goto next_entry;
+ } else if (dflt.vcc.present & (1<<CISTPL_POWER_VNOM)) {
+ if (conf.Vcc != dflt.vcc.param[CISTPL_POWER_VNOM]/10000)
+ goto next_entry;
+ }
+
+ if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
+ link->conf.Vpp1 = link->conf.Vpp2 =
+ cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
+ else if (dflt.vpp1.present & (1<<CISTPL_POWER_VNOM))
+ link->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);
+ }
+
+ /*
+ Now set up a common memory window, if needed. There is room
+ in the dev_link_t structure for one memory window handle,
+ but if the base addresses need to be saved, or if multiple
+ windows are needed, the info should go in the private data
+ structure for this device.
+
+ Note that the memory window base is a physical address, and
+ needs to be mapped to virtual space with ioremap() before it
+ is used.
+ */
+ if ((cfg->mem.nwin > 0) || (dflt.mem.nwin > 0)) {
+ cistpl_mem_t *mem =
+ (cfg->mem.nwin) ? &cfg->mem : &dflt.mem;
+ req.Attributes = WIN_DATA_WIDTH_16|WIN_MEMORY_TYPE_CM;
+ req.Attributes |= WIN_ENABLE;
+ req.Base = mem->win[0].host_addr;
+ req.Size = mem->win[0].len;
+ if (req.Size < 0x1000)
+ req.Size = 0x1000;
+ req.AccessSpeed = 0;
+ link->win = (window_handle_t)link->handle;
+ CFG_CHECK(RequestWindow, &link->win, &req);
+ map.Page = 0; map.CardOffset = mem->win[0].card_addr;
+ CFG_CHECK(MapMemPage, link->win, &map);
+ }
+ /* If we got this far, we're cool! */
+ break;
+
+ next_entry:
+ if (link->io.NumPorts1)
+ CardServices(ReleaseIO, link->handle, &link->io);
+ 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, "skel0");
+ 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);
+ if (link->win)
+ printk(", mem 0x%06lx-0x%06lx", req.Base,
+ req.Base+req.Size-1);
+ printk("\n");
+
+ link->state &= ~DEV_CONFIG_PENDING;
+ return;
+
+cs_failed:
+ cs_error(link->handle, last_fn, last_ret);
+ labpc_release((u_long)link);
+
+} /* labpc_config */
+
+/*======================================================================
+
+ After a card is removed, labpc_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 labpc_release(u_long arg)
+{
+ dev_link_t *link = (dev_link_t *)arg;
+
+ DEBUG(0, "labpc_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, "ni_labpc: 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 */
+ if (link->win)
+ CardServices(ReleaseWindow, link->win);
+ 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)
+ labpc_cs_detach(link);
+
+} /* labpc_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 labpc_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, "labpc_event(0x%06x)\n", event);
+
+ switch (event) {
+ case CS_EVENT_CARD_REMOVAL:
+ link->state &= ~DEV_PRESENT;
+ if (link->state & DEV_CONFIG) {
+ ((local_info_t *)link->priv)->stop = 1;
+ mod_timer(&link->release, jiffies + HZ/20);
+ }
+ break;
+ case CS_EVENT_CARD_INSERTION:
+ link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
+ dev->bus = args->bus;
+ labpc_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;
+ /*
+ In a normal driver, additional code may go here to restore
+ the device state and restart IO.
+ */
+ break;
+ }
+ return 0;
+} /* labpc_event */
+
+/*====================================================================*/
+
+static int __init init_labpc_cs(void)
+{
+ servinfo_t serv;
+ DEBUG(0, "%s\n", version);
+ CardServices(GetCardServicesInfo, &serv);
+ if (serv.Revision != CS_RELEASE_CODE) {
+ printk(KERN_NOTICE "ni_labpc: Card Services release "
+ "does not match!\n");
+ return -1;
+ }
+ register_pccard_driver(&dev_info, &labpc_cs_attach, &labpc_cs_detach);
+ return 0;
+}
+
+static void __exit exit_labpc_cs(void)
+{
+ DEBUG(0, "ni_labpc: unloading\n");
+ unregister_pccard_driver(&dev_info);
+ while (pcmcia_dev_list != NULL) {
+ del_timer(&pcmcia_dev_list->release);
+ if (pcmcia_dev_list->state & DEV_CONFIG)
+ labpc_release((u_long)pcmcia_dev_list);
+ labpc_cs_detach(pcmcia_dev_list);
+ }
+}
+
+int init_module(void)
+{
+ int ret;
+
+ ret = init_labpc_cs();
+ if(ret < 0)
+ return ret;
+
+ return comedi_driver_register(&driver_labpc);
+}
+
+void cleanup_module(void)
+{
+ exit_labpc_cs();
+ comedi_driver_unregister(&driver_labpc);
+}
+
+#else
+COMEDI_INITCLEANUP(driver_labpc);
+
+#endif // CONFIG_PCMCIA
projects / comedi.git / commitdiff