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linux_old1/drivers/pcmcia/pcmcia_resource.c

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/*
* 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 <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"
#include "ds_internal.h"
/* Access speed for IO windows */
static int io_speed = 0;
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
#ifdef DEBUG
extern int ds_pc_debug;
#define ds_dbg(skt, lvl, fmt, arg...) do { \
if (ds_pc_debug >= lvl) \
printk(KERN_DEBUG "pcmcia_resource: %s: " fmt, \
cs_socket_name(skt) , ## arg); \
} while (0)
#else
#define ds_dbg(lvl, fmt, arg...) do { } while (0)
#endif
/** 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) {
ds_dbg(s, 0, "odd IO request: num %#x align %#x\n",
num, align);
align = 0;
} else
while (align && (align < num)) align <<= 1;
}
if (*base & ~(align-1)) {
ds_dbg(s, 0, "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 CS_NO_CARD;
s = p_dev->socket;
c = p_dev->function_config;
if (!(c->state & CONFIG_LOCKED))
return CS_CONFIGURATION_LOCKED;
addr = (c->ConfigBase + reg->Offset) >> 1;
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:
return CS_BAD_ARGS;
break;
}
return CS_SUCCESS;
} /* pcmcia_access_configuration_register */
EXPORT_SYMBOL(pcmcia_access_configuration_register);
int pccard_get_configuration_info(struct pcmcia_socket *s,
struct pcmcia_device *p_dev,
config_info_t *config)
{
config_t *c;
if (!(s->state & SOCKET_PRESENT))
return CS_NO_CARD;
#ifdef CONFIG_CARDBUS
if (s->state & SOCKET_CARDBUS) {
memset(config, 0, sizeof(config_info_t));
config->Vcc = s->socket.Vcc;
config->Vpp1 = config->Vpp2 = s->socket.Vpp;
config->Option = s->cb_dev->subordinate->number;
if (s->state & SOCKET_CARDBUS_CONFIG) {
config->Attributes = CONF_VALID_CLIENT;
config->IntType = INT_CARDBUS;
config->AssignedIRQ = s->irq.AssignedIRQ;
if (config->AssignedIRQ)
config->Attributes |= CONF_ENABLE_IRQ;
if (s->io[0].res) {
config->BasePort1 = s->io[0].res->start;
config->NumPorts1 = s->io[0].res->end - config->BasePort1 + 1;
}
}
return CS_SUCCESS;
}
#endif
if (p_dev) {
c = p_dev->function_config;
config->Function = p_dev->func;
} else {
c = NULL;
config->Function = 0;
}
if ((c == NULL) || !(c->state & CONFIG_LOCKED)) {
config->Attributes = 0;
config->Vcc = s->socket.Vcc;
config->Vpp1 = config->Vpp2 = s->socket.Vpp;
return CS_SUCCESS;
}
config->Attributes = c->Attributes | CONF_VALID_CLIENT;
config->Vcc = s->socket.Vcc;
config->Vpp1 = config->Vpp2 = s->socket.Vpp;
config->IntType = c->IntType;
config->ConfigBase = c->ConfigBase;
config->Status = c->Status;
config->Pin = c->Pin;
config->Copy = c->Copy;
config->Option = c->Option;
config->ExtStatus = c->ExtStatus;
config->Present = config->CardValues = c->CardValues;
config->IRQAttributes = c->irq.Attributes;
config->AssignedIRQ = s->irq.AssignedIRQ;
config->BasePort1 = c->io.BasePort1;
config->NumPorts1 = c->io.NumPorts1;
config->Attributes1 = c->io.Attributes1;
config->BasePort2 = c->io.BasePort2;
config->NumPorts2 = c->io.NumPorts2;
config->Attributes2 = c->io.Attributes2;
config->IOAddrLines = c->io.IOAddrLines;
return CS_SUCCESS;
} /* pccard_get_configuration_info */
int pcmcia_get_configuration_info(struct pcmcia_device *p_dev,
config_info_t *config)
{
return pccard_get_configuration_info(p_dev->socket, p_dev,
config);
}
EXPORT_SYMBOL(pcmcia_get_configuration_info);
/** pcmcia_get_window
*/
int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle,
int idx, win_req_t *req)
{
window_t *win;
int w;
if (!s || !(s->state & SOCKET_PRESENT))
return CS_NO_CARD;
for (w = idx; w < MAX_WIN; w++)
if (s->state & SOCKET_WIN_REQ(w))
break;
if (w == MAX_WIN)
return CS_NO_MORE_ITEMS;
win = &s->win[w];
req->Base = win->ctl.res->start;
req->Size = win->ctl.res->end - win->ctl.res->start + 1;
req->AccessSpeed = win->ctl.speed;
req->Attributes = 0;
if (win->ctl.flags & MAP_ATTRIB)
req->Attributes |= WIN_MEMORY_TYPE_AM;
if (win->ctl.flags & MAP_ACTIVE)
req->Attributes |= WIN_ENABLE;
if (win->ctl.flags & MAP_16BIT)
req->Attributes |= WIN_DATA_WIDTH_16;
if (win->ctl.flags & MAP_USE_WAIT)
req->Attributes |= WIN_USE_WAIT;
*handle = win;
return CS_SUCCESS;
} /* pcmcia_get_window */
EXPORT_SYMBOL(pcmcia_get_window);
/** pcmcia_get_mem_page
*
* Change the card address of an already open memory window.
*/
int pcmcia_get_mem_page(window_handle_t win, memreq_t *req)
{
if ((win == NULL) || (win->magic != WINDOW_MAGIC))
return CS_BAD_HANDLE;
req->Page = 0;
req->CardOffset = win->ctl.card_start;
return CS_SUCCESS;
} /* pcmcia_get_mem_page */
EXPORT_SYMBOL(pcmcia_get_mem_page);
int pcmcia_map_mem_page(window_handle_t win, memreq_t *req)
{
struct pcmcia_socket *s;
if ((win == NULL) || (win->magic != WINDOW_MAGIC))
return CS_BAD_HANDLE;
if (req->Page != 0)
return CS_BAD_PAGE;
s = win->sock;
win->ctl.card_start = req->CardOffset;
if (s->ops->set_mem_map(s, &win->ctl) != 0)
return CS_BAD_OFFSET;
return CS_SUCCESS;
} /* 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;
s = p_dev->socket;
c = p_dev->function_config;
if (!(s->state & SOCKET_PRESENT))
return CS_NO_CARD;
if (!(c->state & CONFIG_LOCKED))
return CS_CONFIGURATION_LOCKED;
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)
return CS_BAD_VCC;
/* 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)
return CS_BAD_VPP;
s->socket.Vpp = mod->Vpp1;
if (s->ops->set_socket(s, &s->socket))
return CS_BAD_VPP;
} else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
(mod->Attributes & CONF_VPP2_CHANGE_VALID))
return CS_BAD_VPP;
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);
}
}
return CS_SUCCESS;
} /* 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 = p_dev->function_config;
int i;
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);
}
}
return CS_SUCCESS;
} /* 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;
config_t *c = p_dev->function_config;
if (!p_dev->_io )
return CS_BAD_HANDLE;
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))
return CS_BAD_ARGS;
c->state &= ~CONFIG_IO_REQ;
release_io_space(s, req->BasePort1, req->NumPorts1);
if (req->NumPorts2)
release_io_space(s, req->BasePort2, req->NumPorts2);
return CS_SUCCESS;
} /* 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= p_dev->function_config;
if (!p_dev->_irq)
return CS_BAD_HANDLE;
p_dev->_irq = 0;
if (c->state & CONFIG_LOCKED)
return CS_CONFIGURATION_LOCKED;
if (c->irq.Attributes != req->Attributes)
return CS_BAD_ATTRIBUTE;
if (s->irq.AssignedIRQ != req->AssignedIRQ)
return CS_BAD_IRQ;
if (--s->irq.Config == 0) {
c->state &= ~CONFIG_IRQ_REQ;
s->irq.AssignedIRQ = 0;
}
if (req->Attributes & IRQ_HANDLE_PRESENT) {
free_irq(req->AssignedIRQ, req->Instance);
}
#ifdef CONFIG_PCMCIA_PROBE
pcmcia_used_irq[req->AssignedIRQ]--;
#endif
return CS_SUCCESS;
} /* pcmcia_release_irq */
int pcmcia_release_window(window_handle_t win)
{
struct pcmcia_socket *s;
if ((win == NULL) || (win->magic != WINDOW_MAGIC))
return CS_BAD_HANDLE;
s = win->sock;
if (!(win->handle->_win & CLIENT_WIN_REQ(win->index)))
return CS_BAD_HANDLE;
/* Shut down memory window */
win->ctl.flags &= ~MAP_ACTIVE;
s->ops->set_mem_map(s, &win->ctl);
s->state &= ~SOCKET_WIN_REQ(win->index);
/* Release system memory */
if (win->ctl.res) {
release_resource(win->ctl.res);
kfree(win->ctl.res);
win->ctl.res = NULL;
}
win->handle->_win &= ~CLIENT_WIN_REQ(win->index);
win->magic = 0;
return CS_SUCCESS;
} /* 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 CS_NO_CARD;
if (req->IntType & INT_CARDBUS)
return CS_UNSUPPORTED_MODE;
c = p_dev->function_config;
if (c->state & CONFIG_LOCKED)
return CS_CONFIGURATION_LOCKED;
/* Do power control. We don't allow changes in Vcc. */
s->socket.Vpp = req->Vpp;
if (s->ops->set_socket(s, &s->socket))
return CS_BAD_VPP;
/* 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++;
/* 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) {
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;
return CS_SUCCESS;
} /* 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;
if (!(s->state & SOCKET_PRESENT))
return CS_NO_CARD;
if (!req)
return CS_UNSUPPORTED_MODE;
c = p_dev->function_config;
if (c->state & CONFIG_LOCKED)
return CS_CONFIGURATION_LOCKED;
if (c->state & CONFIG_IO_REQ)
return CS_IN_USE;
if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))
return CS_BAD_ATTRIBUTE;
if ((req->NumPorts2 > 0) &&
(req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)))
return CS_BAD_ATTRIBUTE;
if (alloc_io_space(s, req->Attributes1, &req->BasePort1,
req->NumPorts1, req->IOAddrLines))
return CS_IN_USE;
if (req->NumPorts2) {
if (alloc_io_space(s, req->Attributes2, &req->BasePort2,
req->NumPorts2, req->IOAddrLines)) {
release_io_space(s, req->BasePort1, req->NumPorts1);
return CS_IN_USE;
}
}
c->io = *req;
c->state |= CONFIG_IO_REQ;
p_dev->_io = 1;
return CS_SUCCESS;
} /* 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 = CS_IN_USE, irq = 0;
int type;
if (!(s->state & SOCKET_PRESENT))
return CS_NO_CARD;
c = p_dev->function_config;
if (c->state & CONFIG_LOCKED)
return CS_CONFIGURATION_LOCKED;
if (c->state & CONFIG_IRQ_REQ)
return CS_IN_USE;
/* 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;
if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)
type = IRQF_SHARED;
#ifdef CONFIG_PCMCIA_PROBE
#ifdef IRQ_NOAUTOEN
/* if the underlying IRQ infrastructure allows for it, only allocate
* the IRQ, but do not enable it
*/
if (!(req->Attributes & IRQ_HANDLE_PRESENT))
type |= IRQ_NOAUTOEN;
#endif /* IRQ_NOAUTOEN */
if (s->irq.AssignedIRQ != 0) {
/* If the interrupt is already assigned, it must be the same */
irq = s->irq.AssignedIRQ;
} else {
int try;
u32 mask = s->irq_mask;
void *data = &p_dev->dev.driver; /* 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->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action,
type,
p_dev->devname,
(req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data);
if (!ret) {
if (!(req->Attributes & IRQ_HANDLE_PRESENT))
free_irq(irq, data);
break;
}
}
}
#endif
/* only assign PCI irq if no IRQ already assigned */
if (ret && !s->irq.AssignedIRQ) {
if (!s->pci_irq)
return ret;
type = IRQF_SHARED;
irq = s->pci_irq;
}
if (ret && (req->Attributes & IRQ_HANDLE_PRESENT)) {
if (request_irq(irq, req->Handler, type, p_dev->devname, req->Instance))
return CS_IN_USE;
}
/* 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;
printk(KERN_WARNING "pcmcia: request for exclusive IRQ could not be fulfilled.\n");
printk(KERN_WARNING "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
return CS_SUCCESS;
} /* 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;
window_t *win;
u_long align;
int w;
if (!(s->state & SOCKET_PRESENT))
return CS_NO_CARD;
if (req->Attributes & (WIN_PAGED | WIN_SHARED))
return CS_BAD_ATTRIBUTE;
/* 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))
return CS_BAD_SIZE;
if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
(req->Base & (align-1)))
return CS_BAD_BASE;
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)
return CS_OUT_OF_RESOURCE;
win = &s->win[w];
win->magic = WINDOW_MAGIC;
win->index = w;
win->handle = *p_dev;
win->sock = s;
if (!(s->features & SS_CAP_STATIC_MAP)) {
win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align,
(req->Attributes & WIN_MAP_BELOW_1MB), s);
if (!win->ctl.res)
return CS_IN_USE;
}
(*p_dev)->_win |= CLIENT_WIN_REQ(w);
/* Configure the socket controller */
win->ctl.map = w+1;
win->ctl.flags = 0;
win->ctl.speed = req->AccessSpeed;
if (req->Attributes & WIN_MEMORY_TYPE)
win->ctl.flags |= MAP_ATTRIB;
if (req->Attributes & WIN_ENABLE)
win->ctl.flags |= MAP_ACTIVE;
if (req->Attributes & WIN_DATA_WIDTH_16)
win->ctl.flags |= MAP_16BIT;
if (req->Attributes & WIN_USE_WAIT)
win->ctl.flags |= MAP_USE_WAIT;
win->ctl.card_start = 0;
if (s->ops->set_mem_map(s, &win->ctl) != 0)
return CS_BAD_ARGS;
s->state |= SOCKET_WIN_REQ(w);
/* Return window handle */
if (s->features & SS_CAP_STATIC_MAP) {
req->Base = win->ctl.static_start;
} else {
req->Base = win->ctl.res->start;
}
*wh = win;
return CS_SUCCESS;
} /* 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->win);
}
EXPORT_SYMBOL(pcmcia_disable_device);
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