// SPDX-License-Identifier: GPL-2.0-only
/*
* 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 - 2010 Dominik Brodowski
*/
#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;
}
/**
* release_io_space ( ) - release IO ports allocated with alloc_io_space ( )
* @ s : pcmcia socket
* @ res : resource to release
*
*/
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;
}
}
}
}
/**
* alloc_io_space ( ) - allocate IO ports for use by a PCMCIA device
* @ s : pcmcia socket
* @ res : resource to allocate ( begin : begin , end : size )
* @ lines : number of IO lines decoded by the PCMCIA card
*
* 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;
}
/*
* 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 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;
}
/*
* 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);
/**
* pcmcia_map_mem_page ( ) - modify iomem window to point to a different offset
* @ p_dev : pcmcia device
* @ res : iomem resource already enabled by pcmcia_request_window ( )
* @ offset : card_offset to map
*
* pcmcia_map_mem_page ( ) modifies what can be read and written by accessing
* an iomem range previously enabled by pcmcia_request_window ( ) , by setting
* the card_offset value to @ offset .
*/
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);
/**
* pcmcia_fixup_iowidth ( ) - reduce io width to 8 bit
* @ p_dev : pcmcia device
*
* pcmcia_fixup_iowidth ( ) allows a PCMCIA device driver to reduce the
* IO width to 8 bit after having called pcmcia_enable_device ( )
* previously .
*/
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);
msleep(40 );
s->ops->set_io_map(s, &io_on);
}
unlock:
mutex_unlock(&s->ops_mutex);
return ret;
}
EXPORT_SYMBOL(pcmcia_fixup_iowidth);
/**
* pcmcia_fixup_vpp ( ) - set Vpp to a new voltage level
* @ p_dev : pcmcia device
* @ new_vpp : new Vpp voltage
*
* pcmcia_fixup_vpp ( ) allows a PCMCIA device driver to set Vpp to
* a new voltage level between calls to pcmcia_enable_device ( )
* and pcmcia_disable_device ( ) .
*/
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);
/**
* pcmcia_release_configuration ( ) - physically disable a PCMCIA device
* @ p_dev : pcmcia device
*
* pcmcia_release_configuration ( ) is the 1 : 1 counterpart to
* pcmcia_enable_device ( ) : If a PCMCIA device is no longer used by any
* driver , the Vpp voltage is set to 0 , IRQs will no longer be generated ,
* and I / O ranges will be disabled . As pcmcia_release_io ( ) and
* pcmcia_release_window ( ) still need to be called , device drivers are
* expected to call pcmcia_disable_device ( ) instead .
*/
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_io ( ) - release I / O allocated by a PCMCIA device
* @ p_dev : pcmcia device
*
* pcmcia_release_io ( ) releases the I / O ranges allocated by a PCMCIA
* device . 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 void pcmcia_release_io(struct pcmcia_device *p_dev)
{
struct pcmcia_socket *s = p_dev->socket;
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);
} /* pcmcia_release_io */
/**
* pcmcia_release_window ( ) - release reserved iomem for PCMCIA devices
* @ p_dev : pcmcia device
* @ res : iomem resource to release
*
* pcmcia_release_window ( ) releases & struct resource * res which was
* previously reserved by calling pcmcia_request_window ( ) .
*/
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);
/**
* pcmcia_enable_device ( ) - set up and activate a PCMCIA device
* @ p_dev : the associated PCMCIA device
*
* pcmcia_enable_device ( ) physically enables a PCMCIA device . It parses
* the flags passed to in @ flags and stored in @ p_dev - > flags and sets up
* the Vpp voltage , enables the speaker line , I / O ports and store proper
* values to configuration registers .
*/
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_warn(&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);
msleep(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 & 0 xff;
pcmcia_write_cis_mem(s, 1 , (base + CISREG_IOBASE_0)>>1 , 1 , &b);
b = (c->io[0 ].start >> 8 ) & 0 xff;
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);
/**
* pcmcia_request_io ( ) - attempt to reserve port ranges for PCMCIA devices
* @ p_dev : the associated PCMCIA device
*
* pcmcia_request_io ( ) attempts 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
* @ p_dev : the associated PCMCIA device
* @ handler : IRQ handler to register
*
* pcmcia_request_irq ( ) is a wrapper around request_irq ( ) which allows
* 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 ( ) themselves , 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);
#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
* @ type : IRQ type ( flags )
*
* 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 ( ) - attempt to reserve iomem for PCMCIA devices
* @ p_dev : the associated PCMCIA device
* @ res : & struct resource pointing to p_dev - > resource [ 2 . . 5 ]
* @ speed : access speed
*
* pcmcia_request_window ( ) attepts to reserve an iomem ranges specified in
* & struct resource @ res pointing to one of the entries in
* & struct pcmcia_device @ p_dev - > resource [ 2 . . 5 ] . The " start " value is the
* requested start of the IO mem resource ; " end " reflects the size
* requested .
*/
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);
/**
* pcmcia_disable_device ( ) - disable and clean up a PCMCIA device
* @ p_dev : the associated PCMCIA device
*
* pcmcia_disable_device ( ) is the driver - callable counterpart to
* pcmcia_enable_device ( ) : If a PCMCIA device is no longer used ,
* drivers are expected to clean up and disable the device by calling
* this function . Any I / O ranges ( iomem and ioports ) will be released ,
* the Vpp voltage will be set to 0 , and IRQs will no longer be
* generated - - at least if there is no other card function ( of
* multifunction devices ) being used .
*/
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);
Messung V0.5 in Prozent C=95 H=89 G=91
¤ Dauer der Verarbeitung: 0.17 Sekunden
(vorverarbeitet am 2026-09-29)
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