/*
* PCMCIA 16-bit resource management functions
*
* The initial developer of the original 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.
*
* Copyright (C) 1999 David A. Hinds
* Copyright (C) 2004-2005 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/cs.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;
}
}
}
} /* release_io_space */
/** alloc_io_space
*
* Special stuff for managing IO windows, because they are scarce
*/
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;
} /* alloc_io_space */
/**
* pcmcia_access_config() - read or write card configuration registers
*
* pcmcia_access_config() reads and writes configuration registers in
* attribute memory. Memory window 0 is reserved for this and the tuple
* reading services. Drivers must use pcmcia_read_config_byte() or
* pcmcia_write_config_byte().
*/
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 isnt't locked\n");
mutex_unlock(&s->ops_mutex);
return -EACCES;
}
addr = (c->ConfigBase + where) >> 1;
ret = accessf(s, 1, addr, 1, val);
mutex_unlock(&s->ops_mutex);
return ret;
} /* pcmcia_access_config */
/**
* pcmcia_read_config_byte() - read a byte from a card configuration register
*
* pcmcia_read_config_byte() reads a byte from a configuration register in
* attribute memory.
*/
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);
/**
* pcmcia_write_config_byte() - write a byte to a card configuration register
*
* pcmcia_write_config_byte() writes a byte to a configuration register in
* attribute memory.
*/
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, window_handle_t wh,
unsigned int offset)
{
struct pcmcia_socket *s = p_dev->socket;
struct resource *res = wh;
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;
} /* pcmcia_map_mem_page */
EXPORT_SYMBOL(pcmcia_map_mem_page);
/** pcmcia_modify_configuration
*
* Modify a locked socket configuration
*/
int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
modconf_t *mod)
{
struct pcmcia_socket *s;
config_t *c;
int ret;
s = p_dev->socket;
mutex_lock(&s->ops_mutex);
c = p_dev->function_config;
if (!(s->state & SOCKET_PRESENT)) {
dev_dbg(&p_dev->dev, "No card present\n");
ret = -ENODEV;
goto unlock;
}
if (!(c->state & CONFIG_LOCKED)) {
dev_dbg(&p_dev->dev, "Configuration isnt't locked\n");
ret = -EACCES;
goto unlock;
}
if (mod->Attributes & (CONF_IRQ_CHANGE_VALID | CONF_VCC_CHANGE_VALID)) {
dev_dbg(&p_dev->dev,
"changing Vcc or IRQ is not allowed at this time\n");
ret = -EINVAL;
goto unlock;
}
/* We only allow changing Vpp1 and Vpp2 to the same value */
if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
(mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
if (mod->Vpp1 != mod->Vpp2) {
dev_dbg(&p_dev->dev,
"Vpp1 and Vpp2 must be the same\n");
ret = -EINVAL;
goto unlock;
}
s->socket.Vpp = mod->Vpp1;
if (s->ops->set_socket(s, &s->socket)) {
dev_printk(KERN_WARNING, &p_dev->dev,
"Unable to set VPP\n");
ret = -EIO;
goto unlock;
}
} else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
(mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
dev_dbg(&p_dev->dev,
"changing Vcc is not allowed at this time\n");
ret = -EINVAL;
goto unlock;
}
if (mod->Attributes & CONF_IO_CHANGE_WIDTH) {
pccard_io_map io_off = { 0, 0, 0, 0, 1 };
pccard_io_map io_on;
int i;
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);
}
}
ret = 0;
unlock:
mutex_unlock(&s->ops_mutex);
return ret;
} /* modify_configuration */
EXPORT_SYMBOL(pcmcia_modify_configuration);
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;
} /* pcmcia_release_configuration */
/** pcmcia_release_io
*
* Release_io() releases the I/O ranges allocated by a client. This
* may be invoked some time after a card ejection has already dumped
* the actual socket configuration, so if the client is "stale", we
* don't bother checking the port ranges against the current socket
* values.
*/
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;
}
p_dev->_win &= ~CLIENT_WIN_REQ(w);
mutex_unlock(&s->ops_mutex);
return 0;
} /* pcmcia_release_window */
EXPORT_SYMBOL(pcmcia_release_window);
int pcmcia_request_configuration(struct pcmcia_device *p_dev,
config_req_t *req)
{
int i;
u_int base;
struct pcmcia_socket *s = p_dev->socket;
config_t *c;
pccard_io_map iomap;
if (!(s->state & SOCKET_PRESENT))
return -ENODEV;
if (req->IntType & INT_CARDBUS) {
dev_dbg(&p_dev->dev, "IntType may not be INT_CARDBUS\n");
return -EINVAL;
}
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 = req->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 */
c->IntType = req->IntType;
c->Attributes = req->Attributes;
if (req->IntType & INT_MEMORY_AND_IO)
s->socket.flags |= SS_IOCARD;
if (req->IntType & INT_ZOOMED_VIDEO)
s->socket.flags |= SS_ZVCARD | SS_IOCARD;
if (req->Attributes & CONF_ENABLE_DMA)
s->socket.flags |= SS_DMA_MODE;
if (req->Attributes & CONF_ENABLE_SPKR)
s->socket.flags |= SS_SPKR_ENA;
if (req->Attributes & CONF_ENABLE_IRQ)
s->socket.io_irq = s->pcmcia_irq;
else
s->socket.io_irq = 0;
s->ops->set_socket(s, &s->socket);
s->lock_count++;
/* Set up CIS configuration registers */
base = c->ConfigBase = req->ConfigBase;
c->CardValues = req->Present;
if (req->Present & PRESENT_COPY) {
c->Copy = req->Copy;
pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
}
if (req->Present & PRESENT_OPTION) {
if (s->functions == 1) {
c->Option = req->ConfigIndex & COR_CONFIG_MASK;
} else {
c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
if (req->Present & PRESENT_IOBASE_0)
c->Option |= COR_ADDR_DECODE;
}
if ((req->Attributes & CONF_ENABLE_IRQ) &&
!(req->Attributes & CONF_ENABLE_PULSE_IRQ))
c->Option |= COR_LEVEL_REQ;
pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
mdelay(40);
}
if (req->Present & PRESENT_STATUS) {
c->Status = req->Status;
pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
}
if (req->Present & PRESENT_PIN_REPLACE) {
c->Pin = req->Pin;
pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
}
if (req->Present & PRESENT_EXT_STATUS) {
c->ExtStatus = req->ExtStatus;
pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
}
if (req->Present & 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 (req->Present & 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_request_configuration */
EXPORT_SYMBOL(pcmcia_request_configuration);
/**
* pcmcia_request_io() - attempt to reserve port ranges for PCMCIA devices
*
* pcmcia_request_io() attepts to reserve the IO port ranges specified in
* &struct pcmcia_device @p_dev->resource[0] and @p_dev->resource[1]. The
* "start" value is the requested start of the IO port resource; "end"
* reflects the number of ports requested. The number of IO lines requested
* is specified in &struct pcmcia_device @p_dev->io_lines.
*/
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);
/**
* pcmcia_request_irq() - attempt to request a IRQ for a PCMCIA device
*
* pcmcia_request_irq() is a wrapper around request_irq which will allow
* the PCMCIA core to clean up the registration in pcmcia_disable_device().
* Drivers are free to use request_irq() directly, but then they need to
* call free_irq themselfves, too. Also, only IRQF_SHARED capable IRQ
* handlers are allowed.
*/
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);
/**
* pcmcia_request_exclusive_irq() - attempt to request an exclusive IRQ first
*
* pcmcia_request_exclusive_irq() is a wrapper around request_irq which
* attempts first to request an exclusive IRQ. If it fails, it also accepts
* a shared IRQ, but prints out a warning. PCMCIA drivers should allow for
* IRQ sharing and either use request_irq directly (then they need to call
* free_irq themselves, too), or the pcmcia_request_irq() function.
*/
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;
}
/**
* pcmcia_setup_isa_irq() - determine whether an ISA IRQ can be used
* @p_dev - the associated PCMCIA device
*
* locking note: must be called with ops_mutex locked.
*/
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 */
/**
* pcmcia_setup_irq() - determine IRQ to be used for device
* @p_dev - the associated PCMCIA device
*
* locking note: must be called with ops_mutex locked.
*/
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;
}
/** pcmcia_request_window
*
* Request_window() establishes a mapping between card memory space
* and system memory space.
*/
int pcmcia_request_window(struct pcmcia_device *p_dev, win_req_t *req, window_handle_t *wh)
{
struct pcmcia_socket *s = p_dev->socket;
pccard_mem_map *win;
u_long align;
struct resource *res;
int w;
if (!(s->state & SOCKET_PRESENT)) {
dev_dbg(&p_dev->dev, "No card present\n");
return -ENODEV;
}
/* Window size defaults to smallest available */
if (req->Size == 0)
req->Size = s->map_size;
align = (s->features & SS_CAP_MEM_ALIGN) ? req->Size : s->map_size;
if (req->Size & (s->map_size-1)) {
dev_dbg(&p_dev->dev, "invalid map size\n");
return -EINVAL;
}
if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
(req->Base & (align-1))) {
dev_dbg(&p_dev->dev, "invalid base address\n");
return -EINVAL;
}
if (req->Base)
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(req->Base, req->Size, 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 = req->Attributes;
win->speed = req->AccessSpeed;
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)
req->Base = win->static_start;
else
req->Base = win->res->start;
/* convert to new-style resources */
res = p_dev->resource[w + MAX_IO_WIN];
res->start = req->Base;
res->end = req->Base + req->Size - 1;
res->flags &= ~IORESOURCE_BITS;
res->flags |= (req->Attributes & WIN_FLAGS_MAP) | (win->map << 2);
res->flags |= 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);
*wh = res;
return 0;
} /* pcmcia_request_window */
EXPORT_SYMBOL(pcmcia_request_window);
void pcmcia_disable_device(struct pcmcia_device *p_dev)
{
int i;
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);
