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kernel_optimize_test/drivers/pcmcia/pcmcia_resource.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

974 lines
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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>
#define IN_CARD_SERVICES
#include <pcmcia/cs_types.h>
#include <pcmcia/ss.h>
#include <pcmcia/cs.h>
#include <pcmcia/bulkmem.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 cs_socket_name(skt) ((skt)->dev.class_id)
#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, ioaddr_t *base,
ioaddr_t num, u_int lines)
{
int i;
kio_addr_t 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 %#lx\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 %#lx\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) &&
((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, ioaddr_t base,
ioaddr_t 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);
/** pccard_get_status
*
* Get the current socket state bits. We don't support the latched
* SocketState yet: I haven't seen any point for it.
*/
int pccard_get_status(struct pcmcia_socket *s, struct pcmcia_device *p_dev,
cs_status_t *status)
{
config_t *c;
int val;
s->ops->get_status(s, &val);
status->CardState = status->SocketState = 0;
status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0;
status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0;
status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0;
status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0;
if (s->state & SOCKET_SUSPEND)
status->CardState |= CS_EVENT_PM_SUSPEND;
if (!(s->state & SOCKET_PRESENT))
return CS_NO_CARD;
c = (p_dev) ? p_dev->function_config : NULL;
if ((c != NULL) && (c->state & CONFIG_LOCKED) &&
(c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) {
u_char reg;
if (c->CardValues & PRESENT_PIN_REPLACE) {
pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, &reg);
status->CardState |=
(reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0;
status->CardState |=
(reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0;
status->CardState |=
(reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0;
status->CardState |=
(reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0;
} else {
/* No PRR? Then assume we're always ready */
status->CardState |= CS_EVENT_READY_CHANGE;
}
if (c->CardValues & PRESENT_EXT_STATUS) {
pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, &reg);
status->CardState |=
(reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0;
}
return CS_SUCCESS;
}
status->CardState |=
(val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0;
status->CardState |=
(val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0;
status->CardState |=
(val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0;
status->CardState |=
(val & SS_READY) ? CS_EVENT_READY_CHANGE : 0;
return CS_SUCCESS;
} /* pccard_get_status */
int pcmcia_get_status(struct pcmcia_device *p_dev, cs_status_t *status)
{
return pccard_get_status(p_dev->socket, p_dev, status);
}
EXPORT_SYMBOL(pcmcia_get_status);
/** 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
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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