linux/drivers/pcmcia/pcmcia_resource.c
Dominik Brodowski d3e03f4ea8 pcmcia: use previously assigned IRQ for all card functions
Use a previously assigned IRQ for all card functions, not only if
CONFIG_PCMCIA_PROBE is set.

Reported-by: Alexander Kurz <linux@kbdbabel.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
2010-04-11 14:36:58 +02:00

1175 lines
30 KiB
C

/*
* 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 <pcmcia/cs_types.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);
#ifdef CONFIG_PCMCIA_PROBE
#include <asm/irq.h>
/* mask of IRQs already reserved by other cards, we should avoid using them */
static u8 pcmcia_used_irq[NR_IRQS];
#endif
static int pcmcia_adjust_io_region(struct resource *res, unsigned long start,
unsigned long end, struct pcmcia_socket *s)
{
if (s->resource_ops->adjust_io_region)
return s->resource_ops->adjust_io_region(res, start, end, s);
return -ENOMEM;
}
static struct resource *pcmcia_find_io_region(unsigned long base, int num,
unsigned long align,
struct pcmcia_socket *s)
{
if (s->resource_ops->find_io)
return s->resource_ops->find_io(base, num, align, s);
return NULL;
}
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;
}
/** alloc_io_space
*
* Special stuff for managing IO windows, because they are scarce
*/
static int alloc_io_space(struct pcmcia_socket *s, u_int attr,
unsigned int *base, unsigned int num, u_int lines)
{
int i;
unsigned int try, align;
align = (*base) ? (lines ? 1<<lines : 0) : 1;
if (align && (align < num)) {
if (*base) {
dev_dbg(&s->dev, "odd IO request: num %#x align %#x\n",
num, align);
align = 0;
} else
while (align && (align < num))
align <<= 1;
}
if (*base & ~(align-1)) {
dev_dbg(&s->dev, "odd IO request: base %#x align %#x\n",
*base, align);
align = 0;
}
if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
*base = s->io_offset | (*base & 0x0fff);
return 0;
}
/* Check for an already-allocated window that must conflict with
* what was asked for. It is a hack because it does not catch all
* potential conflicts, just the most obvious ones.
*/
for (i = 0; i < MAX_IO_WIN; i++)
if ((s->io[i].res) && *base &&
((s->io[i].res->start & (align-1)) == *base))
return 1;
for (i = 0; i < MAX_IO_WIN; i++) {
if (!s->io[i].res) {
s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
if (s->io[i].res) {
*base = s->io[i].res->start;
s->io[i].res->flags = (s->io[i].res->flags & ~IORESOURCE_BITS) | (attr & IORESOURCE_BITS);
s->io[i].InUse = num;
break;
} else
return 1;
} else if ((s->io[i].res->flags & IORESOURCE_BITS) != (attr & IORESOURCE_BITS))
continue;
/* Try to extend top of window */
try = s->io[i].res->end + 1;
if ((*base == 0) || (*base == try))
if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
s->io[i].res->end + num, s) == 0) {
*base = try;
s->io[i].InUse += num;
break;
}
/* Try to extend bottom of window */
try = s->io[i].res->start - num;
if ((*base == 0) || (*base == try))
if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
s->io[i].res->end, s) == 0) {
*base = try;
s->io[i].InUse += num;
break;
}
}
return (i == MAX_IO_WIN);
} /* alloc_io_space */
static void release_io_space(struct pcmcia_socket *s, unsigned int base,
unsigned int num)
{
int i;
for (i = 0; i < MAX_IO_WIN; i++) {
if (!s->io[i].res)
continue;
if ((s->io[i].res->start <= base) &&
(s->io[i].res->end >= base+num-1)) {
s->io[i].InUse -= num;
/* 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 */
/** pccard_access_configuration_register
*
* Access_configuration_register() reads and writes configuration
* registers in attribute memory. Memory window 0 is reserved for
* this and the tuple reading services.
*/
int pcmcia_access_configuration_register(struct pcmcia_device *p_dev,
conf_reg_t *reg)
{
struct pcmcia_socket *s;
config_t *c;
int addr;
u_char val;
if (!p_dev || !p_dev->function_config)
return -EINVAL;
s = p_dev->socket;
mutex_lock(&s->ops_mutex);
c = p_dev->function_config;
if (!(c->state & CONFIG_LOCKED)) {
dev_dbg(&s->dev, "Configuration isnt't locked\n");
mutex_unlock(&s->ops_mutex);
return -EACCES;
}
addr = (c->ConfigBase + reg->Offset) >> 1;
mutex_unlock(&s->ops_mutex);
switch (reg->Action) {
case CS_READ:
pcmcia_read_cis_mem(s, 1, addr, 1, &val);
reg->Value = val;
break;
case CS_WRITE:
val = reg->Value;
pcmcia_write_cis_mem(s, 1, addr, 1, &val);
break;
default:
dev_dbg(&s->dev, "Invalid conf register request\n");
return -EINVAL;
break;
}
return 0;
} /* pcmcia_access_configuration_register */
EXPORT_SYMBOL(pcmcia_access_configuration_register);
int pcmcia_map_mem_page(struct pcmcia_device *p_dev, window_handle_t wh,
memreq_t *req)
{
struct pcmcia_socket *s = p_dev->socket;
int ret;
wh--;
if (wh >= MAX_WIN)
return -EINVAL;
if (req->Page != 0) {
dev_dbg(&s->dev, "failure: requested page is zero\n");
return -EINVAL;
}
mutex_lock(&s->ops_mutex);
s->win[wh].card_start = req->CardOffset;
ret = s->ops->set_mem_map(s, &s->win[wh]);
if (ret)
dev_warn(&s->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(&s->dev, "No card present\n");
ret = -ENODEV;
goto unlock;
}
if (!(c->state & CONFIG_LOCKED)) {
dev_dbg(&s->dev, "Configuration isnt't locked\n");
ret = -EACCES;
goto unlock;
}
if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
if (mod->Attributes & CONF_ENABLE_IRQ) {
c->Attributes |= CONF_ENABLE_IRQ;
s->socket.io_irq = s->irq.AssignedIRQ;
} else {
c->Attributes &= ~CONF_ENABLE_IRQ;
s->socket.io_irq = 0;
}
s->ops->set_socket(s, &s->socket);
}
if (mod->Attributes & CONF_VCC_CHANGE_VALID) {
dev_dbg(&s->dev, "changing Vcc 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(&s->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, &s->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(&s->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, io_req_t *req)
{
struct pcmcia_socket *s = p_dev->socket;
int ret = -EINVAL;
config_t *c;
mutex_lock(&s->ops_mutex);
c = p_dev->function_config;
if (!p_dev->_io)
goto out;
p_dev->_io = 0;
if ((c->io.BasePort1 != req->BasePort1) ||
(c->io.NumPorts1 != req->NumPorts1) ||
(c->io.BasePort2 != req->BasePort2) ||
(c->io.NumPorts2 != req->NumPorts2))
goto out;
c->state &= ~CONFIG_IO_REQ;
release_io_space(s, req->BasePort1, req->NumPorts1);
if (req->NumPorts2)
release_io_space(s, req->BasePort2, req->NumPorts2);
out:
mutex_unlock(&s->ops_mutex);
return ret;
} /* pcmcia_release_io */
static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
{
struct pcmcia_socket *s = p_dev->socket;
config_t *c;
int ret = -EINVAL;
mutex_lock(&s->ops_mutex);
c = p_dev->function_config;
if (!p_dev->_irq)
goto out;
p_dev->_irq = 0;
if (c->state & CONFIG_LOCKED)
goto out;
if (c->irq.Attributes != req->Attributes) {
dev_dbg(&s->dev, "IRQ attributes must match assigned ones\n");
goto out;
}
if (s->irq.AssignedIRQ != req->AssignedIRQ) {
dev_dbg(&s->dev, "IRQ must match assigned one\n");
goto out;
}
if (--s->irq.Config == 0) {
c->state &= ~CONFIG_IRQ_REQ;
s->irq.AssignedIRQ = 0;
}
if (req->Handler)
free_irq(req->AssignedIRQ, p_dev->priv);
#ifdef CONFIG_PCMCIA_PROBE
pcmcia_used_irq[req->AssignedIRQ]--;
#endif
ret = 0;
out:
mutex_unlock(&s->ops_mutex);
return ret;
} /* pcmcia_release_irq */
int pcmcia_release_window(struct pcmcia_device *p_dev, window_handle_t wh)
{
struct pcmcia_socket *s = p_dev->socket;
pccard_mem_map *win;
wh--;
if (wh >= MAX_WIN)
return -EINVAL;
mutex_lock(&s->ops_mutex);
win = &s->win[wh];
if (!(p_dev->_win & CLIENT_WIN_REQ(wh))) {
dev_dbg(&s->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(wh);
/* Release system memory */
if (win->res) {
release_resource(win->res);
kfree(win->res);
win->res = NULL;
}
p_dev->_win &= ~CLIENT_WIN_REQ(wh);
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(&s->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(&s->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, &s->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->irq.AssignedIRQ;
else
s->socket.io_irq = 0;
s->ops->set_socket(s, &s->socket);
s->lock_count++;
mutex_unlock(&s->ops_mutex);
/* 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 (c->state & CONFIG_IRQ_REQ)
if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
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) {
u_char b = c->io.BasePort1 & 0xff;
pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
b = (c->io.BasePort1 >> 8) & 0xff;
pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
}
if (req->Present & PRESENT_IOSIZE) {
u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
}
/* Configure I/O windows */
if (c->state & CONFIG_IO_REQ) {
mutex_lock(&s->ops_mutex);
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++;
}
mutex_unlock(&s->ops_mutex);
}
c->state |= CONFIG_LOCKED;
p_dev->_locked = 1;
return 0;
} /* pcmcia_request_configuration */
EXPORT_SYMBOL(pcmcia_request_configuration);
/** pcmcia_request_io
*
* Request_io() reserves ranges of port addresses for a socket.
* I have not implemented range sharing or alias addressing.
*/
int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
{
struct pcmcia_socket *s = p_dev->socket;
config_t *c;
int ret = -EINVAL;
mutex_lock(&s->ops_mutex);
if (!(s->state & SOCKET_PRESENT)) {
dev_dbg(&s->dev, "No card present\n");
goto out;
}
if (!req)
goto out;
c = p_dev->function_config;
if (c->state & CONFIG_LOCKED) {
dev_dbg(&s->dev, "Configuration is locked\n");
goto out;
}
if (c->state & CONFIG_IO_REQ) {
dev_dbg(&s->dev, "IO already configured\n");
goto out;
}
if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)) {
dev_dbg(&s->dev, "bad attribute setting for IO region 1\n");
goto out;
}
if ((req->NumPorts2 > 0) &&
(req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))) {
dev_dbg(&s->dev, "bad attribute setting for IO region 2\n");
goto out;
}
dev_dbg(&s->dev, "trying to allocate resource 1\n");
ret = alloc_io_space(s, req->Attributes1, &req->BasePort1,
req->NumPorts1, req->IOAddrLines);
if (ret) {
dev_dbg(&s->dev, "allocation of resource 1 failed\n");
goto out;
}
if (req->NumPorts2) {
dev_dbg(&s->dev, "trying to allocate resource 2\n");
ret = alloc_io_space(s, req->Attributes2, &req->BasePort2,
req->NumPorts2, req->IOAddrLines);
if (ret) {
dev_dbg(&s->dev, "allocation of resource 2 failed\n");
release_io_space(s, req->BasePort1, req->NumPorts1);
goto out;
}
}
c->io = *req;
c->state |= CONFIG_IO_REQ;
p_dev->_io = 1;
dev_dbg(&s->dev, "allocating resources succeeded: %d\n", ret);
out:
mutex_unlock(&s->ops_mutex);
return ret;
} /* pcmcia_request_io */
EXPORT_SYMBOL(pcmcia_request_io);
/** pcmcia_request_irq
*
* Request_irq() reserves an irq for this client.
*
* Also, since Linux only reserves irq's when they are actually
* hooked, we don't guarantee that an irq will still be available
* when the configuration is locked. Now that I think about it,
* there might be a way to fix this using a dummy handler.
*/
#ifdef CONFIG_PCMCIA_PROBE
static irqreturn_t test_action(int cpl, void *dev_id)
{
return IRQ_NONE;
}
#endif
int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
{
struct pcmcia_socket *s = p_dev->socket;
config_t *c;
int ret = -EINVAL, irq = 0;
int type;
mutex_lock(&s->ops_mutex);
if (!(s->state & SOCKET_PRESENT)) {
dev_dbg(&s->dev, "No card present\n");
goto out;
}
c = p_dev->function_config;
if (c->state & CONFIG_LOCKED) {
dev_dbg(&s->dev, "Configuration is locked\n");
goto out;
}
if (c->state & CONFIG_IRQ_REQ) {
dev_dbg(&s->dev, "IRQ already configured\n");
goto out;
}
/* Decide what type of interrupt we are registering */
type = 0;
if (s->functions > 1) /* All of this ought to be handled higher up */
type = IRQF_SHARED;
else if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)
type = IRQF_SHARED;
else
printk(KERN_WARNING "pcmcia: Driver needs updating to support IRQ sharing.\n");
/* If the interrupt is already assigned, it must be the same */
if (s->irq.AssignedIRQ != 0)
irq = s->irq.AssignedIRQ;
#ifdef CONFIG_PCMCIA_PROBE
if (!irq) {
int try;
u32 mask = s->irq_mask;
void *data = p_dev; /* something unique to this device */
for (try = 0; try < 64; try++) {
irq = try % 32;
/* marked as available by driver, and not blocked by userspace? */
if (!((mask >> irq) & 1))
continue;
/* avoid an IRQ which is already used by a PCMCIA card */
if ((try < 32) && pcmcia_used_irq[irq])
continue;
/* register the correct driver, if possible, of 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,
(req->Handler) ? req->Handler : test_action,
type,
p_dev->devname,
(req->Handler) ? p_dev->priv : data);
if (!ret) {
if (!req->Handler)
free_irq(irq, data);
break;
}
}
}
#endif
/* only assign PCI irq if no IRQ already assigned */
if (ret && !s->irq.AssignedIRQ) {
if (!s->pci_irq) {
dev_printk(KERN_INFO, &s->dev, "no IRQ found\n");
goto out;
}
type = IRQF_SHARED;
irq = s->pci_irq;
}
if (ret && req->Handler) {
ret = request_irq(irq, req->Handler, type,
p_dev->devname, p_dev->priv);
if (ret) {
dev_printk(KERN_INFO, &s->dev,
"request_irq() failed\n");
goto out;
}
}
/* Make sure the fact the request type was overridden is passed back */
if (type == IRQF_SHARED && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) {
req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING;
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");
}
c->irq.Attributes = req->Attributes;
s->irq.AssignedIRQ = req->AssignedIRQ = irq;
s->irq.Config++;
c->state |= CONFIG_IRQ_REQ;
p_dev->_irq = 1;
#ifdef CONFIG_PCMCIA_PROBE
pcmcia_used_irq[irq]++;
#endif
ret = 0;
out:
mutex_unlock(&s->ops_mutex);
return ret;
} /* pcmcia_request_irq */
EXPORT_SYMBOL(pcmcia_request_irq);
/** 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;
int w;
if (!(s->state & SOCKET_PRESENT)) {
dev_dbg(&s->dev, "No card present\n");
return -ENODEV;
}
if (req->Attributes & (WIN_PAGED | WIN_SHARED)) {
dev_dbg(&s->dev, "bad attribute setting for iomem region\n");
return -EINVAL;
}
/* Window size defaults to smallest available */
if (req->Size == 0)
req->Size = s->map_size;
align = (((s->features & SS_CAP_MEM_ALIGN) ||
(req->Attributes & WIN_STRICT_ALIGN)) ?
req->Size : s->map_size);
if (req->Size & (s->map_size-1)) {
dev_dbg(&s->dev, "invalid map size\n");
return -EINVAL;
}
if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
(req->Base & (align-1))) {
dev_dbg(&s->dev, "invalid base address\n");
return -EINVAL;
}
if (req->Base)
align = 0;
/* Allocate system memory window */
for (w = 0; w < MAX_WIN; w++)
if (!(s->state & SOCKET_WIN_REQ(w)))
break;
if (w == MAX_WIN) {
dev_dbg(&s->dev, "all windows are used already\n");
return -EINVAL;
}
mutex_lock(&s->ops_mutex);
win = &s->win[w];
if (!(s->features & SS_CAP_STATIC_MAP)) {
win->res = pcmcia_find_mem_region(req->Base, req->Size, align,
(req->Attributes & WIN_MAP_BELOW_1MB), s);
if (!win->res) {
dev_dbg(&s->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 = 0;
win->speed = req->AccessSpeed;
if (req->Attributes & WIN_MEMORY_TYPE)
win->flags |= MAP_ATTRIB;
if (req->Attributes & WIN_ENABLE)
win->flags |= MAP_ACTIVE;
if (req->Attributes & WIN_DATA_WIDTH_16)
win->flags |= MAP_16BIT;
if (req->Attributes & WIN_USE_WAIT)
win->flags |= MAP_USE_WAIT;
win->card_start = 0;
if (s->ops->set_mem_map(s, win) != 0) {
dev_dbg(&s->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;
mutex_unlock(&s->ops_mutex);
*wh = w + 1;
return 0;
} /* pcmcia_request_window */
EXPORT_SYMBOL(pcmcia_request_window);
void pcmcia_disable_device(struct pcmcia_device *p_dev)
{
pcmcia_release_configuration(p_dev);
pcmcia_release_io(p_dev, &p_dev->io);
pcmcia_release_irq(p_dev, &p_dev->irq);
if (p_dev->win)
pcmcia_release_window(p_dev, p_dev->win);
}
EXPORT_SYMBOL(pcmcia_disable_device);
struct pcmcia_cfg_mem {
struct pcmcia_device *p_dev;
void *priv_data;
int (*conf_check) (struct pcmcia_device *p_dev,
cistpl_cftable_entry_t *cfg,
cistpl_cftable_entry_t *dflt,
unsigned int vcc,
void *priv_data);
cisparse_t parse;
cistpl_cftable_entry_t dflt;
};
/**
* pcmcia_do_loop_config() - internal helper for pcmcia_loop_config()
*
* pcmcia_do_loop_config() is the internal callback for the call from
* pcmcia_loop_config() to pccard_loop_tuple(). Data is transferred
* by a struct pcmcia_cfg_mem.
*/
static int pcmcia_do_loop_config(tuple_t *tuple, cisparse_t *parse, void *priv)
{
cistpl_cftable_entry_t *cfg = &parse->cftable_entry;
struct pcmcia_cfg_mem *cfg_mem = priv;
/* default values */
cfg_mem->p_dev->conf.ConfigIndex = cfg->index;
if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
cfg_mem->dflt = *cfg;
return cfg_mem->conf_check(cfg_mem->p_dev, cfg, &cfg_mem->dflt,
cfg_mem->p_dev->socket->socket.Vcc,
cfg_mem->priv_data);
}
/**
* pcmcia_loop_config() - loop over configuration options
* @p_dev: the struct pcmcia_device which we need to loop for.
* @conf_check: function to call for each configuration option.
* It gets passed the struct pcmcia_device, the CIS data
* describing the configuration option, and private data
* being passed to pcmcia_loop_config()
* @priv_data: private data to be passed to the conf_check function.
*
* pcmcia_loop_config() loops over all configuration options, and calls
* the driver-specific conf_check() for each one, checking whether
* it is a valid one. Returns 0 on success or errorcode otherwise.
*/
int pcmcia_loop_config(struct pcmcia_device *p_dev,
int (*conf_check) (struct pcmcia_device *p_dev,
cistpl_cftable_entry_t *cfg,
cistpl_cftable_entry_t *dflt,
unsigned int vcc,
void *priv_data),
void *priv_data)
{
struct pcmcia_cfg_mem *cfg_mem;
int ret;
cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL);
if (cfg_mem == NULL)
return -ENOMEM;
cfg_mem->p_dev = p_dev;
cfg_mem->conf_check = conf_check;
cfg_mem->priv_data = priv_data;
ret = pccard_loop_tuple(p_dev->socket, p_dev->func,
CISTPL_CFTABLE_ENTRY, &cfg_mem->parse,
cfg_mem, pcmcia_do_loop_config);
kfree(cfg_mem);
return ret;
}
EXPORT_SYMBOL(pcmcia_loop_config);
struct pcmcia_loop_mem {
struct pcmcia_device *p_dev;
void *priv_data;
int (*loop_tuple) (struct pcmcia_device *p_dev,
tuple_t *tuple,
void *priv_data);
};
/**
* pcmcia_do_loop_tuple() - internal helper for pcmcia_loop_config()
*
* pcmcia_do_loop_tuple() is the internal callback for the call from
* pcmcia_loop_tuple() to pccard_loop_tuple(). Data is transferred
* by a struct pcmcia_cfg_mem.
*/
static int pcmcia_do_loop_tuple(tuple_t *tuple, cisparse_t *parse, void *priv)
{
struct pcmcia_loop_mem *loop = priv;
return loop->loop_tuple(loop->p_dev, tuple, loop->priv_data);
};
/**
* pcmcia_loop_tuple() - loop over tuples in the CIS
* @p_dev: the struct pcmcia_device which we need to loop for.
* @code: which CIS code shall we look for?
* @priv_data: private data to be passed to the loop_tuple function.
* @loop_tuple: function to call for each CIS entry of type @function. IT
* gets passed the raw tuple and @priv_data.
*
* pcmcia_loop_tuple() loops over all CIS entries of type @function, and
* calls the @loop_tuple function for each entry. If the call to @loop_tuple
* returns 0, the loop exits. Returns 0 on success or errorcode otherwise.
*/
int pcmcia_loop_tuple(struct pcmcia_device *p_dev, cisdata_t code,
int (*loop_tuple) (struct pcmcia_device *p_dev,
tuple_t *tuple,
void *priv_data),
void *priv_data)
{
struct pcmcia_loop_mem loop = {
.p_dev = p_dev,
.loop_tuple = loop_tuple,
.priv_data = priv_data};
return pccard_loop_tuple(p_dev->socket, p_dev->func, code, NULL,
&loop, pcmcia_do_loop_tuple);
}
EXPORT_SYMBOL(pcmcia_loop_tuple);
struct pcmcia_loop_get {
size_t len;
cisdata_t **buf;
};
/**
* pcmcia_do_get_tuple() - internal helper for pcmcia_get_tuple()
*
* pcmcia_do_get_tuple() is the internal callback for the call from
* pcmcia_get_tuple() to pcmcia_loop_tuple(). As we're only interested in
* the first tuple, return 0 unconditionally. Create a memory buffer large
* enough to hold the content of the tuple, and fill it with the tuple data.
* The caller is responsible to free the buffer.
*/
static int pcmcia_do_get_tuple(struct pcmcia_device *p_dev, tuple_t *tuple,
void *priv)
{
struct pcmcia_loop_get *get = priv;
*get->buf = kzalloc(tuple->TupleDataLen, GFP_KERNEL);
if (*get->buf) {
get->len = tuple->TupleDataLen;
memcpy(*get->buf, tuple->TupleData, tuple->TupleDataLen);
} else
dev_dbg(&p_dev->dev, "do_get_tuple: out of memory\n");
return 0;
}
/**
* pcmcia_get_tuple() - get first tuple from CIS
* @p_dev: the struct pcmcia_device which we need to loop for.
* @code: which CIS code shall we look for?
* @buf: pointer to store the buffer to.
*
* pcmcia_get_tuple() gets the content of the first CIS entry of type @code.
* It returns the buffer length (or zero). The caller is responsible to free
* the buffer passed in @buf.
*/
size_t pcmcia_get_tuple(struct pcmcia_device *p_dev, cisdata_t code,
unsigned char **buf)
{
struct pcmcia_loop_get get = {
.len = 0,
.buf = buf,
};
*get.buf = NULL;
pcmcia_loop_tuple(p_dev, code, pcmcia_do_get_tuple, &get);
return get.len;
}
EXPORT_SYMBOL(pcmcia_get_tuple);
/**
* pcmcia_do_get_mac() - internal helper for pcmcia_get_mac_from_cis()
*
* pcmcia_do_get_mac() is the internal callback for the call from
* pcmcia_get_mac_from_cis() to pcmcia_loop_tuple(). We check whether the
* tuple contains a proper LAN_NODE_ID of length 6, and copy the data
* to struct net_device->dev_addr[i].
*/
static int pcmcia_do_get_mac(struct pcmcia_device *p_dev, tuple_t *tuple,
void *priv)
{
struct net_device *dev = priv;
int i;
if (tuple->TupleData[0] != CISTPL_FUNCE_LAN_NODE_ID)
return -EINVAL;
if (tuple->TupleDataLen < ETH_ALEN + 2) {
dev_warn(&p_dev->dev, "Invalid CIS tuple length for "
"LAN_NODE_ID\n");
return -EINVAL;
}
if (tuple->TupleData[1] != ETH_ALEN) {
dev_warn(&p_dev->dev, "Invalid header for LAN_NODE_ID\n");
return -EINVAL;
}
for (i = 0; i < 6; i++)
dev->dev_addr[i] = tuple->TupleData[i+2];
return 0;
}
/**
* pcmcia_get_mac_from_cis() - read out MAC address from CISTPL_FUNCE
* @p_dev: the struct pcmcia_device for which we want the address.
* @dev: a properly prepared struct net_device to store the info to.
*
* pcmcia_get_mac_from_cis() reads out the hardware MAC address from
* CISTPL_FUNCE and stores it into struct net_device *dev->dev_addr which
* must be set up properly by the driver (see examples!).
*/
int pcmcia_get_mac_from_cis(struct pcmcia_device *p_dev, struct net_device *dev)
{
return pcmcia_loop_tuple(p_dev, CISTPL_FUNCE, pcmcia_do_get_mac, dev);
}
EXPORT_SYMBOL(pcmcia_get_mac_from_cis);