pcmcia_resource.c

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/*
 * PCMCIA 16-bit resource management functions
 *
 * The initial developer of the original code is David A. Hinds
 * <[email protected]>.  Portions created by David A. Hinds
 * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
 *
 * Copyright (C) 1999        David A. Hinds
 * Copyright (C) 2004-2010   Dominik Brodowski
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/device.h>
#include <linux/netdevice.h>
#include <linux/slab.h>

#include <asm/irq.h>

#include <pcmcia/ss.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ds.h>

#include "cs_internal.h"


/* Access speed for IO windows */
static int io_speed;
module_param(io_speed, int, 0444);


int pcmcia_validate_mem(struct pcmcia_socket *s)
{
    if (s->resource_ops->validate_mem)
        return s->resource_ops->validate_mem(s);
    /* if there is no callback, we can assume that everything is OK */
    return 0;
}

struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
                 int low, struct pcmcia_socket *s)
{
    if (s->resource_ops->find_mem)
        return s->resource_ops->find_mem(base, num, align, low, s);
    return NULL;
}


static void release_io_space(struct pcmcia_socket *s, struct resource *res)
{
    resource_size_t num = resource_size(res);
    int i;

    dev_dbg(&s->dev, "release_io_space for %pR\n", res);

    for (i = 0; i < MAX_IO_WIN; i++) {
        if (!s->io[i].res)
            continue;
        if ((s->io[i].res->start <= res->start) &&
            (s->io[i].res->end >= res->end)) {
            s->io[i].InUse -= num;
            if (res->parent)
                release_resource(res);
            res->start = res->end = 0;
            res->flags = IORESOURCE_IO;
            /* Free the window if no one else is using it */
            if (s->io[i].InUse == 0) {
                release_resource(s->io[i].res);
                kfree(s->io[i].res);
                s->io[i].res = NULL;
            }
        }
    }
}


static int alloc_io_space(struct pcmcia_socket *s, struct resource *res,
            unsigned int lines)
{
    unsigned int align;
    unsigned int base = res->start;
    unsigned int num = res->end;
    int ret;

    res->flags |= IORESOURCE_IO;

    dev_dbg(&s->dev, "alloc_io_space request for %pR, %d lines\n",
        res, lines);

    align = base ? (lines ? 1<<lines : 0) : 1;
    if (align && (align < num)) {
        if (base) {
            dev_dbg(&s->dev, "odd IO request\n");
            align = 0;
        } else
            while (align && (align < num))
                align <<= 1;
    }
    if (base & ~(align-1)) {
        dev_dbg(&s->dev, "odd IO request\n");
        align = 0;
    }

    ret = s->resource_ops->find_io(s, res->flags, &base, num, align,
                &res->parent);
    if (ret) {
        dev_dbg(&s->dev, "alloc_io_space request failed (%d)\n", ret);
        return -EINVAL;
    }

    res->start = base;
    res->end = res->start + num - 1;

    if (res->parent) {
        ret = request_resource(res->parent, res);
        if (ret) {
            dev_warn(&s->dev,
                "request_resource %pR failed: %d\n", res, ret);
            res->parent = NULL;
            release_io_space(s, res);
        }
    }
    dev_dbg(&s->dev, "alloc_io_space request result %d: %pR\n", ret, res);
    return ret;
}


static int pcmcia_access_config(struct pcmcia_device *p_dev,
                off_t where, u8 *val,
                int (*accessf) (struct pcmcia_socket *s,
                        int attr, unsigned int addr,
                        unsigned int len, void *ptr))
{
    struct pcmcia_socket *s;
    config_t *c;
    int addr;
    int ret = 0;

    s = p_dev->socket;

    mutex_lock(&s->ops_mutex);
    c = p_dev->function_config;

    if (!(c->state & CONFIG_LOCKED)) {
        dev_dbg(&p_dev->dev, "Configuration isn't locked\n");
        mutex_unlock(&s->ops_mutex);
        return -EACCES;
    }

    addr = (p_dev->config_base + where) >> 1;

    ret = accessf(s, 1, addr, 1, val);

    mutex_unlock(&s->ops_mutex);

    return ret;
}


int pcmcia_read_config_byte(struct pcmcia_device *p_dev, off_t where, u8 *val)
{
    return pcmcia_access_config(p_dev, where, val, pcmcia_read_cis_mem);
}
EXPORT_SYMBOL(pcmcia_read_config_byte);


int pcmcia_write_config_byte(struct pcmcia_device *p_dev, off_t where, u8 val)
{
    return pcmcia_access_config(p_dev, where, &val, pcmcia_write_cis_mem);
}
EXPORT_SYMBOL(pcmcia_write_config_byte);


int pcmcia_map_mem_page(struct pcmcia_device *p_dev, struct resource *res,
            unsigned int offset)
{
    struct pcmcia_socket *s = p_dev->socket;
    unsigned int w;
    int ret;

    w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1;
    if (w >= MAX_WIN)
        return -EINVAL;

    mutex_lock(&s->ops_mutex);
    s->win[w].card_start = offset;
    ret = s->ops->set_mem_map(s, &s->win[w]);
    if (ret)
        dev_warn(&p_dev->dev, "failed to set_mem_map\n");
    mutex_unlock(&s->ops_mutex);
    return ret;
}
EXPORT_SYMBOL(pcmcia_map_mem_page);


int pcmcia_fixup_iowidth(struct pcmcia_device *p_dev)
{
    struct pcmcia_socket *s = p_dev->socket;
    pccard_io_map io_off = { 0, 0, 0, 0, 1 };
    pccard_io_map io_on;
    int i, ret = 0;

    mutex_lock(&s->ops_mutex);

    dev_dbg(&p_dev->dev, "fixup iowidth to 8bit\n");

    if (!(s->state & SOCKET_PRESENT) ||
        !(p_dev->function_config->state & CONFIG_LOCKED)) {
        dev_dbg(&p_dev->dev, "No card? Config not locked?\n");
        ret = -EACCES;
        goto unlock;
    }

    io_on.speed = io_speed;
    for (i = 0; i < MAX_IO_WIN; i++) {
        if (!s->io[i].res)
            continue;
        io_off.map = i;
        io_on.map = i;

        io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
        io_on.start = s->io[i].res->start;
        io_on.stop = s->io[i].res->end;

        s->ops->set_io_map(s, &io_off);
        mdelay(40);
        s->ops->set_io_map(s, &io_on);
    }
unlock:
    mutex_unlock(&s->ops_mutex);

    return ret;
}
EXPORT_SYMBOL(pcmcia_fixup_iowidth);


int pcmcia_fixup_vpp(struct pcmcia_device *p_dev, unsigned char new_vpp)
{
    struct pcmcia_socket *s = p_dev->socket;
    int ret = 0;

    mutex_lock(&s->ops_mutex);

    dev_dbg(&p_dev->dev, "fixup Vpp to %d\n", new_vpp);

    if (!(s->state & SOCKET_PRESENT) ||
        !(p_dev->function_config->state & CONFIG_LOCKED)) {
        dev_dbg(&p_dev->dev, "No card? Config not locked?\n");
        ret = -EACCES;
        goto unlock;
    }

    s->socket.Vpp = new_vpp;
    if (s->ops->set_socket(s, &s->socket)) {
        dev_warn(&p_dev->dev, "Unable to set VPP\n");
        ret = -EIO;
        goto unlock;
    }
    p_dev->vpp = new_vpp;

unlock:
    mutex_unlock(&s->ops_mutex);

    return ret;
}
EXPORT_SYMBOL(pcmcia_fixup_vpp);


int pcmcia_release_configuration(struct pcmcia_device *p_dev)
{
    pccard_io_map io = { 0, 0, 0, 0, 1 };
    struct pcmcia_socket *s = p_dev->socket;
    config_t *c;
    int i;

    mutex_lock(&s->ops_mutex);
    c = p_dev->function_config;
    if (p_dev->_locked) {
        p_dev->_locked = 0;
        if (--(s->lock_count) == 0) {
            s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */
            s->socket.Vpp = 0;
            s->socket.io_irq = 0;
            s->ops->set_socket(s, &s->socket);
        }
    }
    if (c->state & CONFIG_LOCKED) {
        c->state &= ~CONFIG_LOCKED;
        if (c->state & CONFIG_IO_REQ)
            for (i = 0; i < MAX_IO_WIN; i++) {
                if (!s->io[i].res)
                    continue;
                s->io[i].Config--;
                if (s->io[i].Config != 0)
                    continue;
                io.map = i;
                s->ops->set_io_map(s, &io);
            }
    }
    mutex_unlock(&s->ops_mutex);

    return 0;
}


static int pcmcia_release_io(struct pcmcia_device *p_dev)
{
    struct pcmcia_socket *s = p_dev->socket;
    int ret = -EINVAL;
    config_t *c;

    mutex_lock(&s->ops_mutex);
    if (!p_dev->_io)
        goto out;

    c = p_dev->function_config;

    release_io_space(s, &c->io[0]);

    if (c->io[1].end)
        release_io_space(s, &c->io[1]);

    p_dev->_io = 0;
    c->state &= ~CONFIG_IO_REQ;

out:
    mutex_unlock(&s->ops_mutex);

    return ret;
} /* pcmcia_release_io */


int pcmcia_release_window(struct pcmcia_device *p_dev, struct resource *res)
{
    struct pcmcia_socket *s = p_dev->socket;
    pccard_mem_map *win;
    unsigned int w;

    dev_dbg(&p_dev->dev, "releasing window %pR\n", res);

    w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1;
    if (w >= MAX_WIN)
        return -EINVAL;

    mutex_lock(&s->ops_mutex);
    win = &s->win[w];

    if (!(p_dev->_win & CLIENT_WIN_REQ(w))) {
        dev_dbg(&p_dev->dev, "not releasing unknown window\n");
        mutex_unlock(&s->ops_mutex);
        return -EINVAL;
    }

    /* Shut down memory window */
    win->flags &= ~MAP_ACTIVE;
    s->ops->set_mem_map(s, win);
    s->state &= ~SOCKET_WIN_REQ(w);

    /* Release system memory */
    if (win->res) {
        release_resource(res);
        release_resource(win->res);
        kfree(win->res);
        win->res = NULL;
    }
    res->start = res->end = 0;
    res->flags = IORESOURCE_MEM;
    p_dev->_win &= ~CLIENT_WIN_REQ(w);
    mutex_unlock(&s->ops_mutex);

    return 0;
} /* pcmcia_release_window */
EXPORT_SYMBOL(pcmcia_release_window);


int pcmcia_enable_device(struct pcmcia_device *p_dev)
{
    int i;
    unsigned int base;
    struct pcmcia_socket *s = p_dev->socket;
    config_t *c;
    pccard_io_map iomap;
    unsigned char status = 0;
    unsigned char ext_status = 0;
    unsigned char option = 0;
    unsigned int flags = p_dev->config_flags;

    if (!(s->state & SOCKET_PRESENT))
        return -ENODEV;

    mutex_lock(&s->ops_mutex);
    c = p_dev->function_config;
    if (c->state & CONFIG_LOCKED) {
        mutex_unlock(&s->ops_mutex);
        dev_dbg(&p_dev->dev, "Configuration is locked\n");
        return -EACCES;
    }

    /* Do power control.  We don't allow changes in Vcc. */
    s->socket.Vpp = p_dev->vpp;
    if (s->ops->set_socket(s, &s->socket)) {
        mutex_unlock(&s->ops_mutex);
        dev_printk(KERN_WARNING, &p_dev->dev,
               "Unable to set socket state\n");
        return -EINVAL;
    }

    /* Pick memory or I/O card, DMA mode, interrupt */
    if (p_dev->_io || flags & CONF_ENABLE_IRQ)
        flags |= CONF_ENABLE_IOCARD;
    if (flags & CONF_ENABLE_IOCARD)
        s->socket.flags |= SS_IOCARD;
    if (flags & CONF_ENABLE_ZVCARD)
        s->socket.flags |= SS_ZVCARD | SS_IOCARD;
    if (flags & CONF_ENABLE_SPKR) {
        s->socket.flags |= SS_SPKR_ENA;
        status = CCSR_AUDIO_ENA;
        if (!(p_dev->config_regs & PRESENT_STATUS))
            dev_warn(&p_dev->dev, "speaker requested, but "
                          "PRESENT_STATUS not set!\n");
    }
    if (flags & CONF_ENABLE_IRQ)
        s->socket.io_irq = s->pcmcia_irq;
    else
        s->socket.io_irq = 0;
    if (flags & CONF_ENABLE_ESR) {
        p_dev->config_regs |= PRESENT_EXT_STATUS;
        ext_status = ESR_REQ_ATTN_ENA;
    }
    s->ops->set_socket(s, &s->socket);
    s->lock_count++;

    dev_dbg(&p_dev->dev,
        "enable_device: V %d, flags %x, base %x, regs %x, idx %x\n",
        p_dev->vpp, flags, p_dev->config_base, p_dev->config_regs,
        p_dev->config_index);

    /* Set up CIS configuration registers */
    base = p_dev->config_base;
    if (p_dev->config_regs & PRESENT_COPY) {
        u16 tmp = 0;
        dev_dbg(&p_dev->dev, "clearing CISREG_SCR\n");
        pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &tmp);
    }
    if (p_dev->config_regs & PRESENT_PIN_REPLACE) {
        u16 tmp = 0;
        dev_dbg(&p_dev->dev, "clearing CISREG_PRR\n");
        pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &tmp);
    }
    if (p_dev->config_regs & PRESENT_OPTION) {
        if (s->functions == 1) {
            option = p_dev->config_index & COR_CONFIG_MASK;
        } else {
            option = p_dev->config_index & COR_MFC_CONFIG_MASK;
            option |= COR_FUNC_ENA|COR_IREQ_ENA;
            if (p_dev->config_regs & PRESENT_IOBASE_0)
                option |= COR_ADDR_DECODE;
        }
        if ((flags & CONF_ENABLE_IRQ) &&
            !(flags & CONF_ENABLE_PULSE_IRQ))
            option |= COR_LEVEL_REQ;
        pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &option);
        mdelay(40);
    }
    if (p_dev->config_regs & PRESENT_STATUS)
        pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &status);

    if (p_dev->config_regs & PRESENT_EXT_STATUS)
        pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1,
                    &ext_status);

    if (p_dev->config_regs & PRESENT_IOBASE_0) {
        u8 b = c->io[0].start & 0xff;
        pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
        b = (c->io[0].start >> 8) & 0xff;
        pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
    }
    if (p_dev->config_regs & PRESENT_IOSIZE) {
        u8 b = resource_size(&c->io[0]) + resource_size(&c->io[1]) - 1;
        pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
    }

    /* Configure I/O windows */
    if (c->state & CONFIG_IO_REQ) {
        iomap.speed = io_speed;
        for (i = 0; i < MAX_IO_WIN; i++)
            if (s->io[i].res) {
                iomap.map = i;
                iomap.flags = MAP_ACTIVE;
                switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
                case IO_DATA_PATH_WIDTH_16:
                    iomap.flags |= MAP_16BIT; break;
                case IO_DATA_PATH_WIDTH_AUTO:
                    iomap.flags |= MAP_AUTOSZ; break;
                default:
                    break;
                }
                iomap.start = s->io[i].res->start;
                iomap.stop = s->io[i].res->end;
                s->ops->set_io_map(s, &iomap);
                s->io[i].Config++;
            }
    }

    c->state |= CONFIG_LOCKED;
    p_dev->_locked = 1;
    mutex_unlock(&s->ops_mutex);
    return 0;
} /* pcmcia_enable_device */
EXPORT_SYMBOL(pcmcia_enable_device);


int pcmcia_request_io(struct pcmcia_device *p_dev)
{
    struct pcmcia_socket *s = p_dev->socket;
    config_t *c = p_dev->function_config;
    int ret = -EINVAL;

    mutex_lock(&s->ops_mutex);
    dev_dbg(&p_dev->dev, "pcmcia_request_io: %pR , %pR",
        &c->io[0], &c->io[1]);

    if (!(s->state & SOCKET_PRESENT)) {
        dev_dbg(&p_dev->dev, "pcmcia_request_io: No card present\n");
        goto out;
    }

    if (c->state & CONFIG_LOCKED) {
        dev_dbg(&p_dev->dev, "Configuration is locked\n");
        goto out;
    }
    if (c->state & CONFIG_IO_REQ) {
        dev_dbg(&p_dev->dev, "IO already configured\n");
        goto out;
    }

    ret = alloc_io_space(s, &c->io[0], p_dev->io_lines);
    if (ret)
        goto out;

    if (c->io[1].end) {
        ret = alloc_io_space(s, &c->io[1], p_dev->io_lines);
        if (ret) {
            struct resource tmp = c->io[0];
            /* release the previously allocated resource */
            release_io_space(s, &c->io[0]);
            /* but preserve the settings, for they worked... */
            c->io[0].end = resource_size(&tmp);
            c->io[0].start = tmp.start;
            c->io[0].flags = tmp.flags;
            goto out;
        }
    } else
        c->io[1].start = 0;

    c->state |= CONFIG_IO_REQ;
    p_dev->_io = 1;

    dev_dbg(&p_dev->dev, "pcmcia_request_io succeeded: %pR , %pR",
        &c->io[0], &c->io[1]);
out:
    mutex_unlock(&s->ops_mutex);

    return ret;
} /* pcmcia_request_io */
EXPORT_SYMBOL(pcmcia_request_io);


int __must_check pcmcia_request_irq(struct pcmcia_device *p_dev,
                    irq_handler_t handler)
{
    int ret;

    if (!p_dev->irq)
        return -EINVAL;

    ret = request_irq(p_dev->irq, handler, IRQF_SHARED,
            p_dev->devname, p_dev->priv);
    if (!ret)
        p_dev->_irq = 1;

    return ret;
}
EXPORT_SYMBOL(pcmcia_request_irq);


int __must_check
__pcmcia_request_exclusive_irq(struct pcmcia_device *p_dev,
            irq_handler_t handler)
{
    int ret;

    if (!p_dev->irq)
        return -EINVAL;

    ret = request_irq(p_dev->irq, handler, 0, p_dev->devname, p_dev->priv);
    if (ret) {
        ret = pcmcia_request_irq(p_dev, handler);
        dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: "
            "request for exclusive IRQ could not be fulfilled.\n");
        dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver "
            "needs updating to supported shared IRQ lines.\n");
    }
    if (ret)
        dev_printk(KERN_INFO, &p_dev->dev, "request_irq() failed\n");
    else
        p_dev->_irq = 1;

    return ret;
} /* pcmcia_request_exclusive_irq */
EXPORT_SYMBOL(__pcmcia_request_exclusive_irq);


#ifdef CONFIG_PCMCIA_PROBE

/* mask of IRQs already reserved by other cards, we should avoid using them */
static u8 pcmcia_used_irq[32];

static irqreturn_t test_action(int cpl, void *dev_id)
{
    return IRQ_NONE;
}

static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type)
{
    struct pcmcia_socket *s = p_dev->socket;
    unsigned int try, irq;
    u32 mask = s->irq_mask;
    int ret = -ENODEV;

    for (try = 0; try < 64; try++) {
        irq = try % 32;

        if (irq > NR_IRQS)
            continue;

        /* marked as available by driver, not blocked by userspace? */
        if (!((mask >> irq) & 1))
            continue;

        /* avoid an IRQ which is already used by another PCMCIA card */
        if ((try < 32) && pcmcia_used_irq[irq])
            continue;

        /* register the correct driver, if possible, to check whether
         * registering a dummy handle works, i.e. if the IRQ isn't
         * marked as used by the kernel resource management core */
        ret = request_irq(irq, test_action, type, p_dev->devname,
                  p_dev);
        if (!ret) {
            free_irq(irq, p_dev);
            p_dev->irq = s->pcmcia_irq = irq;
            pcmcia_used_irq[irq]++;
            break;
        }
    }

    return ret;
}

void pcmcia_cleanup_irq(struct pcmcia_socket *s)
{
    pcmcia_used_irq[s->pcmcia_irq]--;
    s->pcmcia_irq = 0;
}

#else /* CONFIG_PCMCIA_PROBE */

static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type)
{
    return -EINVAL;
}

void pcmcia_cleanup_irq(struct pcmcia_socket *s)
{
    s->pcmcia_irq = 0;
    return;
}

#endif  /* CONFIG_PCMCIA_PROBE */


int pcmcia_setup_irq(struct pcmcia_device *p_dev)
{
    struct pcmcia_socket *s = p_dev->socket;

    if (p_dev->irq)
        return 0;

    /* already assigned? */
    if (s->pcmcia_irq) {
        p_dev->irq = s->pcmcia_irq;
        return 0;
    }

    /* prefer an exclusive ISA irq */
    if (!pcmcia_setup_isa_irq(p_dev, 0))
        return 0;

    /* but accept a shared ISA irq */
    if (!pcmcia_setup_isa_irq(p_dev, IRQF_SHARED))
        return 0;

    /* but use the PCI irq otherwise */
    if (s->pci_irq) {
        p_dev->irq = s->pcmcia_irq = s->pci_irq;
        return 0;
    }

    return -EINVAL;
}


int pcmcia_request_window(struct pcmcia_device *p_dev, struct resource *res,
            unsigned int speed)
{
    struct pcmcia_socket *s = p_dev->socket;
    pccard_mem_map *win;
    u_long align;
    int w;

    dev_dbg(&p_dev->dev, "request_window %pR %d\n", res, speed);

    if (!(s->state & SOCKET_PRESENT)) {
        dev_dbg(&p_dev->dev, "No card present\n");
        return -ENODEV;
    }

    /* Window size defaults to smallest available */
    if (res->end == 0)
        res->end = s->map_size;
    align = (s->features & SS_CAP_MEM_ALIGN) ? res->end : s->map_size;
    if (res->end & (s->map_size-1)) {
        dev_dbg(&p_dev->dev, "invalid map size\n");
        return -EINVAL;
    }
    if ((res->start && (s->features & SS_CAP_STATIC_MAP)) ||
        (res->start & (align-1))) {
        dev_dbg(&p_dev->dev, "invalid base address\n");
        return -EINVAL;
    }
    if (res->start)
        align = 0;

    /* Allocate system memory window */
    mutex_lock(&s->ops_mutex);
    for (w = 0; w < MAX_WIN; w++)
        if (!(s->state & SOCKET_WIN_REQ(w)))
            break;
    if (w == MAX_WIN) {
        dev_dbg(&p_dev->dev, "all windows are used already\n");
        mutex_unlock(&s->ops_mutex);
        return -EINVAL;
    }

    win = &s->win[w];

    if (!(s->features & SS_CAP_STATIC_MAP)) {
        win->res = pcmcia_find_mem_region(res->start, res->end, align,
                        0, s);
        if (!win->res) {
            dev_dbg(&p_dev->dev, "allocating mem region failed\n");
            mutex_unlock(&s->ops_mutex);
            return -EINVAL;
        }
    }
    p_dev->_win |= CLIENT_WIN_REQ(w);

    /* Configure the socket controller */
    win->map = w+1;
    win->flags = res->flags & WIN_FLAGS_MAP;
    win->speed = speed;
    win->card_start = 0;

    if (s->ops->set_mem_map(s, win) != 0) {
        dev_dbg(&p_dev->dev, "failed to set memory mapping\n");
        mutex_unlock(&s->ops_mutex);
        return -EIO;
    }
    s->state |= SOCKET_WIN_REQ(w);

    /* Return window handle */
    if (s->features & SS_CAP_STATIC_MAP)
        res->start = win->static_start;
    else
        res->start = win->res->start;

    /* convert to new-style resources */
    res->end += res->start - 1;
    res->flags &= ~WIN_FLAGS_REQ;
    res->flags |= (win->map << 2) | IORESOURCE_MEM;
    res->parent = win->res;
    if (win->res)
        request_resource(&iomem_resource, res);

    dev_dbg(&p_dev->dev, "request_window results in %pR\n", res);

    mutex_unlock(&s->ops_mutex);

    return 0;
} /* pcmcia_request_window */
EXPORT_SYMBOL(pcmcia_request_window);


void pcmcia_disable_device(struct pcmcia_device *p_dev)
{
    int i;

    dev_dbg(&p_dev->dev, "disabling device\n");

    for (i = 0; i < MAX_WIN; i++) {
        struct resource *res = p_dev->resource[MAX_IO_WIN + i];
        if (res->flags & WIN_FLAGS_REQ)
            pcmcia_release_window(p_dev, res);
    }

    pcmcia_release_configuration(p_dev);
    pcmcia_release_io(p_dev);
    if (p_dev->_irq) {
        free_irq(p_dev->irq, p_dev->priv);
        p_dev->_irq = 0;
    }
}
EXPORT_SYMBOL(pcmcia_disable_device);