patch-2.3.36 linux/drivers/net/pcmcia/com20020_cs.c

• Lines: 570
• Date: Thu Dec 30 11:51:26 1999
• Orig file: v2.3.35/linux/drivers/net/pcmcia/com20020_cs.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.35/linux/drivers/net/pcmcia/com20020_cs.c linux/drivers/net/pcmcia/com20020_cs.c
@@ -0,0 +1,569 @@
+/*
+ * Linux ARCnet driver - COM20020 PCMCIA support
+ * 
+ * Written 1994-1999 by Avery Pennarun,
+ *    based on an ISA version by David Woodhouse.
+ * Derived from ibmtr_cs.c by Steve Kipisz (pcmcia-cs 3.1.4)
+ *    which was derived from pcnet_cs.c by David Hinds.
+ * Some additional portions derived from skeleton.c by Donald Becker.
+ *
+ * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
+ *  for sponsoring the further development of this driver.
+ *
+ * **********************
+ *
+ * The original copyright of skeleton.c was as follows:
+ *
+ * skeleton.c Written 1993 by Donald Becker.
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency.  This software may only be used
+ * and distributed according to the terms of the GNU Public License as
+ * modified by SRC, incorporated herein by reference.
+ * 
+ * **********************
+ * 
+ * For more details, see drivers/net/arcnet.c
+ *
+ * **********************
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/ptrace.h>
+#include <linux/malloc.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+#include <linux/netdevice.h>
+#include <linux/arcdevice.h>
+#include <linux/com20020.h>
+
+#include <pcmcia/version.h>
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+
+#define VERSION "arcnet: COM20020 PCMCIA support loaded.\n"
+
+#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 void regdump(struct net_device *dev)
+{
+    int ioaddr = dev->base_addr;
+    int count;
+    
+    printk("com20020 register dump:\n");
+    for (count = ioaddr; count < ioaddr + 16; count++)
+    {
+	if (!(count % 16))
+	    printk("\n%04X: ", count);
+	printk("%02X ", inb(count));
+    }
+    printk("\n");
+    
+    printk("buffer0 dump:\n");
+	/* set up the address register */
+        count = 0;
+	outb((count >> 8) | RDDATAflag | AUTOINCflag, _ADDR_HI);
+	outb(count & 0xff, _ADDR_LO);
+    
+    for (count = 0; count < 256+32; count++)
+    {
+	if (!(count % 16))
+	    printk("\n%04X: ", count);
+	
+	/* copy the data */
+	printk("%02X ", inb(_MEMDATA));
+    }
+    printk("\n");
+}
+
+#else
+
+#define DEBUG(n, args...) do { } while (0)
+static inline void regdump(struct net_device *dev) { }
+
+#endif
+
+
+/*====================================================================*/
+
+/* Parameters that can be set with 'insmod' */
+
+static int node = 0;
+static int timeout = 3;
+static int backplane = 0;
+static int clock = 0;
+
+MODULE_PARM(node, "i");
+MODULE_PARM(timeout, "i");
+MODULE_PARM(backplane, "i");
+MODULE_PARM(clock, "i");
+
+/* Bit map of interrupts to choose from */
+static u_int irq_mask = 0xdeb8;
+static int irq_list[4] = { -1 };
+
+MODULE_PARM(irq_mask, "i");
+MODULE_PARM(irq_list, "1-4i");
+
+/*====================================================================*/
+
+static void com20020_config(dev_link_t *link);
+static void com20020_release(u_long arg);
+static int com20020_event(event_t event, int priority,
+                       event_callback_args_t *args);
+
+static dev_info_t dev_info = "com20020_cs";
+
+static dev_link_t *com20020_attach(void);
+static void com20020_detach(dev_link_t *);
+
+static dev_link_t *dev_list = NULL;
+
+/*====================================================================*/
+
+typedef struct com20020_dev_t {
+    struct net_device       *dev;
+    int dev_configured;
+    dev_node_t          node;
+} com20020_dev_t;
+
+/*======================================================================
+
+    This bit of code is used to avoid unregistering network devices
+    at inappropriate times.  2.2 and later kernels are fairly picky
+    about when this can happen.
+    
+======================================================================*/
+
+static void flush_stale_links(void)
+{
+    dev_link_t *link, *next;
+    for (link = dev_list; link; link = next) {
+	next = link->next;
+	if (link->state & DEV_STALE_LINK)
+	    com20020_detach(link);
+    }
+}
+
+/*====================================================================*/
+
+static void cs_error(client_handle_t handle, int func, int ret)
+{
+    error_info_t err = { func, ret };
+    CardServices(ReportError, handle, &err);
+}
+
+/*======================================================================
+
+    com20020_attach() creates an "instance" of the driver, allocating
+    local data structures for one device.  The device is registered
+    with Card Services.
+
+======================================================================*/
+
+static void com20020cs_open_close(struct net_device *dev, bool open)
+{
+    if (open)
+	MOD_INC_USE_COUNT;
+    else
+	MOD_DEC_USE_COUNT;
+}
+
+static dev_link_t *com20020_attach(void)
+{
+    client_reg_t client_reg;
+    dev_link_t *link;
+    com20020_dev_t *info;
+    struct net_device *dev;
+    int i, ret;
+    struct arcnet_local *lp;
+    
+    DEBUG(0, "com20020_attach()\n");
+    flush_stale_links();
+
+    /* Create new network device */
+    link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
+    if (!link)
+	return NULL;
+    memset(link, 0, sizeof(struct dev_link_t));
+    link->release.function = &com20020_release;
+    link->release.data = (u_long)link;
+    link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
+    link->io.NumPorts1 = 16;
+    link->io.IOAddrLines = 16;
+    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->conf.Attributes = CONF_ENABLE_IRQ;
+    link->conf.Vcc = 50;
+    link->conf.IntType = INT_MEMORY_AND_IO;
+    link->conf.Present = PRESENT_OPTION;
+
+    info = kmalloc(sizeof(struct com20020_dev_t), GFP_KERNEL);
+    if (!info)
+	return NULL;
+    memset(info, 0, sizeof(struct com20020_dev_t));
+
+    dev = dev_alloc("arc%d", &ret);
+    if (!dev)
+	return NULL;
+    lp = dev->priv = kmalloc(sizeof(struct arcnet_local), GFP_KERNEL);
+    if (!lp)
+	return NULL;
+    memset(lp, 0, sizeof(struct arcnet_local));
+
+    /* fill in our module parameters as defaults */
+    dev->dev_addr[0] = node;
+    lp->timeout = timeout;
+    lp->backplane = backplane;
+    lp->clock = clock;
+    lp->hw.open_close_ll = com20020cs_open_close;
+
+    link->irq.Instance = info->dev = dev;
+    link->priv = info;
+
+    /* Register with Card Services */
+    link->next = dev_list;
+    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 = &com20020_event;
+    client_reg.Version = 0x0210;
+    client_reg.event_callback_args.client_data = link;
+    ret = CardServices(RegisterClient, &link->handle, &client_reg);
+    if (ret != 0) {
+        cs_error(link->handle, RegisterClient, ret);
+        com20020_detach(link);
+        return NULL;
+    }
+
+    return link;
+} /* com20020_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 com20020_detach(dev_link_t *link)
+{
+    struct com20020_dev_t *info = link->priv;
+    dev_link_t **linkp;
+    struct net_device *dev; 
+    
+    DEBUG(1,"detach...\n");
+
+    DEBUG(0, "com20020_detach(0x%p)\n", link);
+
+    /* Locate device structure */
+    for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
+        if (*linkp == link) break;
+    if (*linkp == NULL)
+        return;
+
+    dev = info->dev;
+
+    if (link->state & DEV_CONFIG) {
+        com20020_release((u_long)link);
+        if (link->state & DEV_STALE_CONFIG) {
+            link->state |= DEV_STALE_LINK;
+            return;
+        }
+    }
+
+    if (link->handle)
+        CardServices(DeregisterClient, link->handle);
+
+    /* Unlink device structure, free bits */
+    DEBUG(1,"unlinking...\n");
+    *linkp = link->next;
+    if (link->priv)
+    {
+	dev = info->dev;
+	if (dev)
+	{
+	    if (info->dev_configured)
+	    {
+		DEBUG(1,"unregister...\n");
+
+		if (dev->start)
+		    dev->stop(dev);
+	    
+		/*
+		 * this is necessary because we register our IRQ separately
+		 * from card services.
+		 */
+		if (dev->irq)
+		    free_irq(dev->irq, dev);
+		
+		/* ...but I/O ports are done automatically by card services */
+		
+		unregister_netdev(dev);
+		MOD_DEC_USE_COUNT;
+	    }
+	    
+	    DEBUG(1,"kfree...\n");
+	    kfree(dev->priv);
+	    kfree(dev);
+	}
+	DEBUG(1,"kfree2...\n");
+	kfree_s(info, sizeof(struct com20020_dev_t));
+    }
+    DEBUG(1,"kfree3...\n");
+    kfree_s(link, sizeof(struct dev_link_t));
+
+} /* com20020_detach */
+
+/*======================================================================
+
+    com20020_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
+
+static void com20020_config(dev_link_t *link)
+{
+    client_handle_t handle;
+    tuple_t tuple;
+    cisparse_t parse;
+    com20020_dev_t *info;
+    struct net_device *dev;
+    int i, last_ret, last_fn;
+    u_char buf[64];
+    int ioaddr;
+
+    handle = link->handle;
+    info = link->priv;
+    dev = info->dev;
+
+    DEBUG(1,"config...\n");
+
+    DEBUG(0, "com20020_config(0x%p)\n", link);
+
+    tuple.Attributes = 0;
+    tuple.TupleData = buf;
+    tuple.TupleDataMax = 64;
+    tuple.TupleOffset = 0;
+    tuple.DesiredTuple = CISTPL_CONFIG;
+    CS_CHECK(GetFirstTuple, handle, &tuple);
+    CS_CHECK(GetTupleData, handle, &tuple);
+    CS_CHECK(ParseTuple, handle, &tuple, &parse);
+    link->conf.ConfigBase = parse.config.base;
+
+    /* Configure card */
+    link->state |= DEV_CONFIG;
+    strcpy(info->node.dev_name, dev->name);
+
+    DEBUG(1,"arcnet: baseport1 is %Xh\n", link->io.BasePort1);
+    i = !CS_SUCCESS;
+    if (!link->io.BasePort1)
+    {
+	for (ioaddr = 0x100; ioaddr < 0x400; ioaddr += 0x10)
+	{
+	    link->io.BasePort1 = ioaddr;
+	    i = CardServices(RequestIO, link->handle, &link->io);
+	    if (i == CS_SUCCESS)
+		break;
+	}
+    }
+    else
+	i = CardServices(RequestIO, link->handle, &link->io);
+    
+    if (i != CS_SUCCESS)
+    {
+	DEBUG(1,"arcnet: requestIO failed totally!\n");
+	goto failed;
+    }
+	
+    ioaddr = dev->base_addr = link->io.BasePort1;
+    DEBUG(1,"arcnet: got ioaddr %Xh\n", ioaddr);
+
+    DEBUG(1,"arcnet: request IRQ %d (%Xh/%Xh)\n",
+	   link->irq.AssignedIRQ,
+	   link->irq.IRQInfo1, link->irq.IRQInfo2);
+    i = CardServices(RequestIRQ, link->handle, &link->irq);
+    if (i != CS_SUCCESS)
+    {
+	DEBUG(1,"arcnet: requestIRQ failed totally!\n");
+	goto failed;
+    }
+
+    dev->irq = link->irq.AssignedIRQ;
+
+    CS_CHECK(RequestConfiguration, link->handle, &link->conf);
+
+    if (com20020_check(dev))
+    {
+	regdump(dev);
+	goto failed;
+    }
+    
+    MOD_INC_USE_COUNT;
+    i = com20020_found(dev, 0);
+    
+    if (i != 0) {
+	DEBUG(1,KERN_NOTICE "com20020_cs: com20020_found() failed\n");
+	goto failed;
+    }
+
+    info->dev_configured = 1;
+    link->dev = &info->node;
+    link->state &= ~DEV_CONFIG_PENDING;
+
+    DEBUG(1,KERN_INFO "%s: port %#3lx, irq %d\n",
+           dev->name, dev->base_addr, dev->irq);
+    return;
+
+cs_failed:
+    cs_error(link->handle, last_fn, last_ret);
+failed:
+    DEBUG(1,"com20020_config failed...\n");
+    com20020_release((u_long)link);
+} /* com20020_config */
+
+/*======================================================================
+
+    After a card is removed, com20020_release() will unregister the net
+    device, and release the PCMCIA configuration.  If the device is
+    still open, this will be postponed until it is closed.
+
+======================================================================*/
+
+static void com20020_release(u_long arg)
+{
+    dev_link_t *link = (dev_link_t *)arg;
+
+    DEBUG(1,"release...\n");
+
+    DEBUG(0, "com20020_release(0x%p)\n", link);
+
+    if (link->open) {
+	DEBUG(1,"postpone...\n");
+	DEBUG(1, "com20020_cs: release postponed, device stll open\n");
+        link->state |= DEV_STALE_CONFIG;
+        return;
+    }
+
+    CardServices(ReleaseConfiguration, link->handle);
+    CardServices(ReleaseIO, link->handle, &link->io);
+    CardServices(ReleaseIRQ, link->handle, &link->irq);
+
+    link->state &= ~(DEV_CONFIG | DEV_RELEASE_PENDING);
+
+} /* com20020_release */
+
+/*======================================================================
+
+    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 net drivers from trying
+    to talk to the card any more.
+
+======================================================================*/
+
+static int com20020_event(event_t event, int priority,
+			  event_callback_args_t *args)
+{
+    dev_link_t *link = args->client_data;
+    com20020_dev_t *info = link->priv;
+    struct net_device *dev = info->dev;
+
+    DEBUG(1, "com20020_event(0x%06x)\n", event);
+    
+    switch (event) {
+    case CS_EVENT_CARD_REMOVAL:
+        link->state &= ~DEV_PRESENT;
+        if (link->state & DEV_CONFIG) {
+            dev->tbusy = 1; dev->start = 0;
+            link->release.expires = jiffies + HZ/20;
+            link->state |= DEV_RELEASE_PENDING;
+            add_timer(&link->release);
+        }
+        break;
+    case CS_EVENT_CARD_INSERTION:
+        link->state |= DEV_PRESENT;
+	com20020_config(link); 
+	break;
+    case CS_EVENT_PM_SUSPEND:
+        link->state |= DEV_SUSPEND;
+        /* Fall through... */
+    case CS_EVENT_RESET_PHYSICAL:
+        if (link->state & DEV_CONFIG) {
+            if (link->open) {
+                dev->tbusy = 1; dev->start = 0;
+            }
+            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);
+            if (link->open) {
+		int ioaddr = dev->base_addr;
+		struct arcnet_local *lp = (struct arcnet_local *)dev->priv;
+		ARCRESET;
+            }
+        }
+        break;
+    }
+    return 0;
+} /* com20020_event */
+
+
+/*====================================================================*/
+
+static int __init init_com20020_cs(void)
+{
+    servinfo_t serv;
+
+    DEBUG(0, "%s\n", VERSION);
+    CardServices(GetCardServicesInfo, &serv);
+    if (serv.Revision != CS_RELEASE_CODE) {
+	printk(KERN_NOTICE "com20020_cs: Card Services release "
+	       "does not match!\n");
+        return -1;
+    }
+    register_pccard_driver(&dev_info, &com20020_attach, &com20020_detach);
+    return 0;
+}
+
+static void __exit exit_com20020_cs(void)
+{
+    DEBUG(0, "com20020_cs: unloading\n");
+    unregister_pccard_driver(&dev_info);
+    while (dev_list != NULL)
+        com20020_detach(dev_list);
+}
+
+module_init(init_com20020_cs);
+module_exit(exit_com20020_cs);