patch-2.3.49 linux/drivers/block/ide-cs.c

• Lines: 482
• Date: Thu Mar 2 11:32:37 2000
• Orig file: v2.3.48/linux/drivers/block/ide-cs.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.48/linux/drivers/block/ide-cs.c linux/drivers/block/ide-cs.c
@@ -0,0 +1,481 @@
+/*======================================================================
+
+    A driver for PCMCIA IDE/ATA disk cards
+
+    ide_cs.c 1.26 1999/11/16 02:10:49
+
+    The 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
+    <dhinds@pcmcia.sourceforge.org>.  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.
+    
+======================================================================*/
+
+#include <linux/module.h>
+#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/ioport.h>
+#include <linux/hdreg.h>
+#include <linux/major.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 <pcmcia/cisreg.h>
+
+#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 =
+"ide_cs.c 1.26 1999/11/16 02:10:49 (David Hinds)";
+#else
+#define DEBUG(n, args...)
+#endif
+
+/*====================================================================*/
+
+/* Parameters that can be set with 'insmod' */
+
+/* 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 const char ide_major[] = {
+    IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR,
+#ifdef IDE4_MAJOR
+    IDE4_MAJOR, IDE5_MAJOR
+#endif
+};
+
+typedef struct ide_info_t {
+    dev_link_t	link;
+    int		ndev;
+    dev_node_t	node;
+    int		hd;
+} ide_info_t;
+
+static void ide_config(dev_link_t *link);
+static void ide_release(u_long arg);
+static int ide_event(event_t event, int priority,
+		     event_callback_args_t *args);
+
+static dev_info_t dev_info = "ide_cs";
+
+static dev_link_t *ide_attach(void);
+static void ide_detach(dev_link_t *);
+
+static dev_link_t *dev_list = NULL;
+
+/*====================================================================*/
+
+static void cs_error(client_handle_t handle, int func, int ret)
+{
+    error_info_t err = { func, ret };
+    CardServices(ReportError, handle, &err);
+}
+
+/*======================================================================
+
+    ide_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 *ide_attach(void)
+{
+    ide_info_t *info;
+    dev_link_t *link;
+    client_reg_t client_reg;
+    int i, ret;
+    
+    DEBUG(0, "ide_attach()\n");
+
+    /* Create new ide device */
+    info = kmalloc(sizeof(*info), GFP_KERNEL);
+    if (!info) return NULL;
+    memset(info, 0, sizeof(*info));
+    link = &info->link; link->priv = info;
+
+    link->release.function = &ide_release;
+    link->release.data = (u_long)link;
+    link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
+    link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
+    link->io.IOAddrLines = 3;
+    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;
+    
+    /* 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 = &ide_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);
+	ide_detach(link);
+	return NULL;
+    }
+    
+    return link;
+} /* ide_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 ide_detach(dev_link_t *link)
+{
+    dev_link_t **linkp;
+    long flags;
+    int ret;
+
+    DEBUG(0, "ide_detach(0x%p)\n", link);
+    
+    /* Locate device structure */
+    for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
+	if (*linkp == link) break;
+    if (*linkp == NULL)
+	return;
+
+    save_flags(flags);
+    cli();
+    if (link->state & DEV_RELEASE_PENDING) {
+	del_timer(&link->release);
+	link->state &= ~DEV_RELEASE_PENDING;
+    }
+    restore_flags(flags);
+    
+    if (link->state & DEV_CONFIG)
+	ide_release((u_long)link);
+    
+    if (link->handle) {
+	ret = CardServices(DeregisterClient, link->handle);
+	if (ret != CS_SUCCESS)
+	    cs_error(link->handle, DeregisterClient, ret);
+    }
+    
+    /* Unlink, free device structure */
+    *linkp = link->next;
+    kfree(link->priv);
+    
+} /* ide_detach */
+
+/*======================================================================
+
+    ide_config() is scheduled to run after a CARD_INSERTION event
+    is received, to configure the PCMCIA socket, and to make the
+    ide 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
+
+void ide_config(dev_link_t *link)
+{
+    client_handle_t handle = link->handle;
+    ide_info_t *info = link->priv;
+    tuple_t tuple;
+    u_short buf[128];
+    cisparse_t parse;
+    config_info_t conf;
+    cistpl_cftable_entry_t *cfg = &parse.cftable_entry;
+    cistpl_cftable_entry_t dflt = { 0 };
+    int i, pass, last_ret, last_fn, hd, io_base, ctl_base;
+
+    DEBUG(0, "ide_config(0x%p)\n", link);
+    
+    tuple.TupleData = (cisdata_t *)buf;
+    tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
+    tuple.Attributes = 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;
+    link->conf.Present = parse.config.rmask[0];
+    
+    /* Configure card */
+    link->state |= DEV_CONFIG;
+
+    /* Not sure if this is right... look up the current Vcc */
+    CS_CHECK(GetConfigurationInfo, handle, &conf);
+    link->conf.Vcc = conf.Vcc;
+    
+    pass = io_base = ctl_base = 0;
+    tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
+    tuple.Attributes = 0;
+    CS_CHECK(GetFirstTuple, handle, &tuple);
+    while (1) {
+	CFG_CHECK(GetTupleData, handle, &tuple);
+	CFG_CHECK(ParseTuple, handle, &tuple, &parse);
+
+	/* Check for matching Vcc, unless we're desperate */
+	if (!pass) {
+	    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;
+	
+	if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
+	    cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
+	    link->conf.ConfigIndex = cfg->index;
+	    link->io.BasePort1 = io->win[0].base;
+	    link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
+	    if (!(io->flags & CISTPL_IO_16BIT))
+		link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
+	    if (io->nwin == 2) {
+		link->io.NumPorts1 = 8;
+		link->io.BasePort2 = io->win[1].base;
+		link->io.NumPorts2 = 1;
+		CFG_CHECK(RequestIO, link->handle, &link->io);
+		io_base = link->io.BasePort1;
+		ctl_base = link->io.BasePort2;
+	    } else if ((io->nwin == 1) && (io->win[0].len >= 16)) {
+		link->io.NumPorts1 = io->win[0].len;
+		link->io.NumPorts2 = 0;
+		CFG_CHECK(RequestIO, link->handle, &link->io);
+		io_base = link->io.BasePort1;
+		ctl_base = link->io.BasePort1+0x0e;
+	    } else goto next_entry;
+	    /* If we've got this far, we're done */
+	    break;
+	}
+	
+    next_entry:
+	if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg;
+	if (pass) {
+	    CS_CHECK(GetNextTuple, handle, &tuple);
+	} else if (CardServices(GetNextTuple, handle, &tuple) != 0) {
+	    CS_CHECK(GetFirstTuple, handle, &tuple);
+	    memset(&dflt, 0, sizeof(dflt));
+	    pass++;
+	}
+    }
+    
+    CS_CHECK(RequestIRQ, handle, &link->irq);
+    CS_CHECK(RequestConfiguration, handle, &link->conf);
+
+    /* deal with brain dead IDE resource management */
+    release_region(link->io.BasePort1, link->io.NumPorts1);
+    if (link->io.NumPorts2)
+	release_region(link->io.BasePort2, link->io.NumPorts2);
+
+    /* retry registration in case device is still spinning up */
+    for (i = 0; i < 10; i++) {
+	hd = ide_register(io_base, ctl_base, link->irq.AssignedIRQ);
+	if (hd >= 0) break;
+	if (link->io.NumPorts1 == 0x20) {
+	    hd = ide_register(io_base+0x10, ctl_base+0x10,
+			      link->irq.AssignedIRQ);
+	    if (hd >= 0) {
+		io_base += 0x10; ctl_base += 0x10;
+		break;
+	    }
+	}
+	__set_current_state(TASK_UNINTERRUPTIBLE);
+	schedule_timeout(HZ/10);
+    }
+    
+    if (hd < 0) {
+	printk(KERN_NOTICE "ide_cs: ide_register() at 0x%3x & 0x%3x"
+	       ", irq %u failed\n", io_base, ctl_base,
+	       link->irq.AssignedIRQ);
+	goto failed;
+    }
+
+    MOD_INC_USE_COUNT;
+    info->ndev = 1;
+    sprintf(info->node.dev_name, "hd%c", 'a'+(hd*2));
+    info->node.major = ide_major[hd];
+    info->node.minor = 0;
+    info->hd = hd;
+    link->dev = &info->node;
+    printk(KERN_INFO "ide_cs: %s: Vcc = %d.%d, Vpp = %d.%d\n",
+	   info->node.dev_name, link->conf.Vcc/10, link->conf.Vcc%10,
+	   link->conf.Vpp1/10, link->conf.Vpp1%10);
+
+    link->state &= ~DEV_CONFIG_PENDING;
+    return;
+    
+cs_failed:
+    cs_error(link->handle, last_fn, last_ret);
+failed:
+    ide_release((u_long)link);
+
+} /* ide_config */
+
+/*======================================================================
+
+    After a card is removed, ide_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.
+    
+======================================================================*/
+
+void ide_release(u_long arg)
+{
+    dev_link_t *link = (dev_link_t *)arg;
+    ide_info_t *info = link->priv;
+    
+    DEBUG(0, "ide_release(0x%p)\n", link);
+
+    if (info->ndev) {
+	ide_unregister(info->hd);
+	MOD_DEC_USE_COUNT;
+    }
+    info->ndev = 0;
+    link->dev = NULL;
+    
+    CardServices(ReleaseConfiguration, link->handle);
+    CardServices(ReleaseIO, link->handle, &link->io);
+    CardServices(ReleaseIRQ, link->handle, &link->irq);
+    
+    link->state &= ~DEV_CONFIG;
+
+} /* ide_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 ide drivers from
+    talking to the ports.
+    
+======================================================================*/
+
+int ide_event(event_t event, int priority,
+	      event_callback_args_t *args)
+{
+    dev_link_t *link = args->client_data;
+
+    DEBUG(1, "ide_event(0x%06x)\n", event);
+    
+    switch (event) {
+    case CS_EVENT_CARD_REMOVAL:
+	link->state &= ~DEV_PRESENT;
+	if (link->state & DEV_CONFIG) {
+	    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 | DEV_CONFIG_PENDING;
+	ide_config(link);
+	break;
+    case CS_EVENT_PM_SUSPEND:
+	link->state |= DEV_SUSPEND;
+	/* Fall through... */
+    case CS_EVENT_RESET_PHYSICAL:
+	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 (DEV_OK(link))
+	    CardServices(RequestConfiguration, link->handle, &link->conf);
+	break;
+    }
+    return 0;
+} /* ide_event */
+
+/*====================================================================*/
+
+static int __init init_ide_cs(void)
+{
+    servinfo_t serv;
+    DEBUG(0, "%s\n", version);
+    CardServices(GetCardServicesInfo, &serv);
+    if (serv.Revision != CS_RELEASE_CODE) {
+	printk(KERN_NOTICE "ide_cs: Card Services release "
+	       "does not match!\n");
+	return -1;
+    }
+    register_pccard_driver(&dev_info, &ide_attach, &ide_detach);
+    return 0;
+}
+
+static void __exit exit_ide_cs(void)
+{
+    DEBUG(0, "ide_cs: unloading\n");
+    unregister_pccard_driver(&dev_info);
+    while (dev_list != NULL)
+	ide_detach(dev_list);
+}
+
+module_init(init_ide_cs);
+module_exit(exit_ide_cs);