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freebsd-dev/sys/pccard/pccard.c
Warner Losh 372458622f A bunch of interrupt related cleanup. 
o Move PIOCSRESOURCE from pccard to pcic so the kernel can give pccardd
  better hints as to what resources to use.
o Implement an undocumented hw.pcic.interrupt_route to allow people that
  need to do so to route their interrupts in a non-standard way.
o Only preallocate a resource in probe if we're routing via pci.
o If we aren't routing via pci, then set the irq to use explicitly
  to defeat the automatic IRQ routing of the pci layer.

This, with the pccardd code should be close to what can be committed
to -stable.
2001-07-31 06:44:37 +00:00

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/*
* pccard.c - Interface code for PC-CARD controllers.
*
* June 1995, Andrew McRae (andrew@mega.com.au)
*-------------------------------------------------------------------------
*
* Copyright (c) 2001 M. Warner Losh. All rights reserved.
* Copyright (c) 1995 Andrew McRae. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#include "opt_pcic.h"
#include <sys/param.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/sysctl.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/poll.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <pccard/cardinfo.h>
#include <pccard/driver.h>
#include <pccard/slot.h>
#include <pccard/pccard_nbk.h>
#include <machine/md_var.h>
SYSCTL_NODE(_machdep, OID_AUTO, pccard, CTLFLAG_RW, 0, "pccard");
/* The following might now be obsolete */
static int pcic_resume_reset = 1;
SYSCTL_INT(_machdep_pccard, OID_AUTO, pcic_resume_reset, CTLFLAG_RW,
&pcic_resume_reset, 0, "");
#define MIN(a,b) ((a)<(b)?(a):(b))
static int allocate_driver(struct slot *, struct dev_desc *);
static void inserted(void *);
static void disable_slot(struct slot *);
static void disable_slot_to(struct slot *);
static void power_off_slot(void *);
/*
* The driver interface for read/write uses a block
* of memory in the ISA I/O memory space allocated via
* an ioctl setting.
*
* Now that we have different bus attachments, we should really
* use a better algorythm to allocate memory.
*/
static unsigned long pccard_mem; /* Physical memory */
static unsigned char *pccard_kmem; /* Kernel virtual address */
static struct resource *pccard_mem_res;
static int pccard_mem_rid;
static d_open_t crdopen;
static d_close_t crdclose;
static d_read_t crdread;
static d_write_t crdwrite;
static d_ioctl_t crdioctl;
static d_poll_t crdpoll;
#define CDEV_MAJOR 50
static struct cdevsw crd_cdevsw = {
/* open */ crdopen,
/* close */ crdclose,
/* read */ crdread,
/* write */ crdwrite,
/* ioctl */ crdioctl,
/* poll */ crdpoll,
/* mmap */ nommap,
/* strategy */ nostrategy,
/* name */ "crd",
/* maj */ CDEV_MAJOR,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ 0,
};
/*
* Power off the slot.
* (doing it immediately makes the removal of some cards unstable)
*/
static void
power_off_slot(void *arg)
{
struct slot *slt = (struct slot *)arg;
int s;
/*
* The following will generate an interrupt. So, to hold off
* the interrupt unitl after disable runs so that we can get rid
* rid of the interrupt before it becomes unsafe to touch the
* device.
*
* XXX In current, the spl stuff is a nop.
*/
s = splhigh();
/* Power off the slot. */
slt->pwr_off_pending = 0;
slt->ctrl->disable(slt);
splx(s);
}
/*
* disable_slot - Disables the slot by removing
* the power and unmapping the I/O
*/
static void
disable_slot(struct slot *slt)
{
device_t pccarddev;
device_t *kids;
int nkids;
int i;
int ret;
/*
* Note that a race condition is possible here; if a
* driver is accessing the device and it is removed, then
* all bets are off...
*/
pccarddev = slt->dev;
device_get_children(pccarddev, &kids, &nkids);
for (i = 0; i < nkids; i++) {
if ((ret = device_delete_child(pccarddev, kids[i])) != 0)
printf("pccard: delete of %s failed: %d\n",
device_get_nameunit(kids[i]), ret);
}
free(kids, M_TEMP);
/* Power off the slot 1/2 second after removal of the card */
slt->poff_ch = timeout(power_off_slot, (caddr_t)slt, hz / 2);
slt->pwr_off_pending = 1;
}
static void
disable_slot_to(struct slot *slt)
{
disable_slot(slt);
if (slt->state == empty)
printf("pccard: card removed, slot %d\n", slt->slotnum);
else
printf("pccard: card deactivated, slot %d\n", slt->slotnum);
pccard_remove_beep();
selwakeup(&slt->selp);
}
/*
* pccard_init_slot - Initialize the slot controller and attach various
* things to it. We also make the device for it. We create the device that
* will be exported to devfs.
*/
struct slot *
pccard_init_slot(device_t dev, struct slot_ctrl *ctrl)
{
int slotno;
struct slot *slt;
slt = PCCARD_DEVICE2SOFTC(dev);
slotno = device_get_unit(dev);
slt->dev = dev;
slt->d = make_dev(&crd_cdevsw, slotno, 0, 0, 0600, "card%d", slotno);
slt->d->si_drv1 = slt;
slt->ctrl = ctrl;
slt->slotnum = slotno;
callout_handle_init(&slt->insert_ch);
callout_handle_init(&slt->poff_ch);
return (slt);
}
/*
* allocate_driver - Create a new device entry for this
* slot, and attach a driver to it.
*/
static int
allocate_driver(struct slot *slt, struct dev_desc *desc)
{
struct pccard_devinfo *devi;
device_t pccarddev;
int err, irq = 0;
device_t child;
pccarddev = slt->dev;
irq = ffs(desc->irqmask) - 1;
MALLOC(devi, struct pccard_devinfo *, sizeof(*devi), M_DEVBUF,
M_WAITOK | M_ZERO);
strcpy(devi->name, desc->name);
/*
* Create an entry for the device under this slot.
*/
devi->running = 1;
devi->slt = slt;
bcopy(desc->misc, devi->misc, sizeof(desc->misc));
resource_list_init(&devi->resources);
child = device_add_child(pccarddev, devi->name, desc->unit);
device_set_flags(child, desc->flags);
device_set_ivars(child, devi);
if (bootverbose) {
device_printf(pccarddev,
"Assigning %s: io 0x%x-0x%x irq %d mem 0x%lx-0x%lx\n",
device_get_nameunit(child),
desc->iobase, desc->iobase + desc->iosize - 1,
irq, desc->mem, desc->mem + desc->memsize - 1);
}
err = bus_set_resource(child, SYS_RES_IOPORT, 0, desc->iobase,
desc->iosize);
if (err)
goto err;
if (irq)
err = bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1);
if (err)
goto err;
if (desc->memsize) {
err = bus_set_resource(child, SYS_RES_MEMORY, 0, desc->mem,
desc->memsize);
if (err)
goto err;
}
err = device_probe_and_attach(child);
/*
* XXX We unwisely assume that the detach code won't run while the
* XXX the attach code is attaching. Someone should put some
* XXX interlock code. This can happen if probe/attach takes a while
* XXX and the user ejects the card, which causes the detach
* XXX function to be called.
*/
strncpy(desc->name, device_get_nameunit(child), sizeof(desc->name));
desc->name[sizeof(desc->name) - 1] = '\0';
err:
if (err)
device_delete_child(pccarddev, child);
return (err);
}
/*
* card insert routine - Called from a timeout to debounce
* insertion events.
*/
static void
inserted(void *arg)
{
struct slot *slt = arg;
slt->state = filled;
/*
* Enable 5V to the card so that the CIS can be read.
*/
slt->pwr.vcc = 50;
slt->pwr.vpp = 50;
/*
* Disable any pending timeouts for this slot, and explicitly
* power it off right now. Then, re-enable the power using
* the (possibly new) power settings.
*/
untimeout(power_off_slot, (caddr_t)slt, slt->poff_ch);
power_off_slot(slt);
slt->ctrl->power(slt);
printf("pccard: card inserted, slot %d\n", slt->slotnum);
pccard_insert_beep();
/*
* Now start resetting the card.
*/
slt->ctrl->reset(slt);
}
/*
* Card event callback. Called at splhigh to prevent
* device interrupts from interceding.
*/
void
pccard_event(struct slot *slt, enum card_event event)
{
if (slt->insert_seq) {
slt->insert_seq = 0;
untimeout(inserted, (void *)slt, slt->insert_ch);
}
switch(event) {
case card_removed:
case card_deactivated:
if (slt->state == filled || slt->state == inactive) {
if (event == card_removed)
slt->state = empty;
else
slt->state = inactive;
disable_slot_to(slt);
}
break;
case card_inserted:
slt->insert_seq = 1;
slt->insert_ch = timeout(inserted, (void *)slt, hz/4);
break;
}
}
/*
* Device driver interface.
*/
static int
crdopen(dev_t dev, int oflags, int devtype, struct proc *p)
{
struct slot *slt = PCCARD_DEV2SOFTC(dev);
if (slt == NULL)
return (ENXIO);
if (slt->rwmem == 0)
slt->rwmem = MDF_ATTR;
return (0);
}
/*
* Close doesn't de-allocate any resources, since
* slots may be assigned to drivers already.
*/
static int
crdclose(dev_t dev, int fflag, int devtype, struct proc *p)
{
return (0);
}
/*
* read interface. Map memory at lseek offset,
* then transfer to user space.
*/
static int
crdread(dev_t dev, struct uio *uio, int ioflag)
{
struct slot *slt = PCCARD_DEV2SOFTC(dev);
struct mem_desc *mp, oldmap;
unsigned char *p;
unsigned int offs;
int error = 0, win, count;
if (slt == 0 || slt->state != filled)
return (ENXIO);
if (pccard_mem == 0)
return (ENOMEM);
for (win = 0; win < slt->ctrl->maxmem; win++)
if ((slt->mem[win].flags & MDF_ACTIVE) == 0)
break;
if (win >= slt->ctrl->maxmem)
return (EBUSY);
mp = &slt->mem[win];
oldmap = *mp;
mp->flags = slt->rwmem | MDF_ACTIVE;
while (uio->uio_resid && error == 0) {
mp->card = uio->uio_offset;
mp->size = PCCARD_MEMSIZE;
mp->start = (caddr_t)(void *)(uintptr_t)pccard_mem;
if ((error = slt->ctrl->mapmem(slt, win)) != 0)
break;
offs = (unsigned int)uio->uio_offset & (PCCARD_MEMSIZE - 1);
p = pccard_kmem + offs;
count = MIN(PCCARD_MEMSIZE - offs, uio->uio_resid);
error = uiomove(p, count, uio);
}
/*
* Restore original map.
*/
*mp = oldmap;
slt->ctrl->mapmem(slt, win);
return (error);
}
/*
* crdwrite - Write data to card memory.
* Handles wrap around so that only one memory
* window is used.
*/
static int
crdwrite(dev_t dev, struct uio *uio, int ioflag)
{
struct slot *slt = PCCARD_DEV2SOFTC(dev);
struct mem_desc *mp, oldmap;
unsigned char *p;
unsigned int offs;
int error = 0, win, count;
if (slt == 0 || slt->state != filled)
return (ENXIO);
if (pccard_mem == 0)
return (ENOMEM);
for (win = 0; win < slt->ctrl->maxmem; win++)
if ((slt->mem[win].flags & MDF_ACTIVE) == 0)
break;
if (win >= slt->ctrl->maxmem)
return (EBUSY);
mp = &slt->mem[win];
oldmap = *mp;
mp->flags = slt->rwmem | MDF_ACTIVE;
while (uio->uio_resid && error == 0) {
mp->card = uio->uio_offset;
mp->size = PCCARD_MEMSIZE;
mp->start = (caddr_t)(void *)(uintptr_t)pccard_mem;
if ((error = slt->ctrl->mapmem(slt, win)) != 0)
break;
offs = (unsigned int)uio->uio_offset & (PCCARD_MEMSIZE - 1);
p = pccard_kmem + offs;
count = MIN(PCCARD_MEMSIZE - offs, uio->uio_resid);
error = uiomove(p, count, uio);
}
/*
* Restore original map.
*/
*mp = oldmap;
slt->ctrl->mapmem(slt, win);
return (error);
}
/*
* ioctl calls - allows setting/getting of memory and I/O
* descriptors, and assignment of drivers.
*/
static int
crdioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct proc *p)
{
u_int32_t addr;
int err;
struct io_desc *ip;
struct mem_desc *mp;
device_t pccarddev;
int pwval;
int s;
struct slot *slt = PCCARD_DEV2SOFTC(dev);
if (slt == 0 && cmd != PIOCRWMEM)
return (ENXIO);
switch(cmd) {
default:
if (slt->ctrl->ioctl)
return (slt->ctrl->ioctl(slt, cmd, data));
return (ENOTTY);
/*
* Get slot state.
*/
case PIOCGSTATE:
s = splhigh();
((struct slotstate *)data)->state = slt->state;
((struct slotstate *)data)->laststate = slt->laststate;
slt->laststate = slt->state;
splx(s);
((struct slotstate *)data)->maxmem = slt->ctrl->maxmem;
((struct slotstate *)data)->maxio = slt->ctrl->maxio;
((struct slotstate *)data)->irqs = 0;
break;
/*
* Get memory context.
*/
case PIOCGMEM:
s = ((struct mem_desc *)data)->window;
if (s < 0 || s >= slt->ctrl->maxmem)
return (EINVAL);
mp = &slt->mem[s];
((struct mem_desc *)data)->flags = mp->flags;
((struct mem_desc *)data)->start = mp->start;
((struct mem_desc *)data)->size = mp->size;
((struct mem_desc *)data)->card = mp->card;
break;
/*
* Set memory context. If context already active, then unmap it.
* It is hard to see how the parameters can be checked.
* At the very least, we only allow root to set the context.
*/
case PIOCSMEM:
if (suser(p))
return (EPERM);
if (slt->state != filled)
return (ENXIO);
s = ((struct mem_desc *)data)->window;
if (s < 0 || s >= slt->ctrl->maxmem)
return (EINVAL);
slt->mem[s] = *((struct mem_desc *)data);
return (slt->ctrl->mapmem(slt, s));
/*
* Get I/O port context.
*/
case PIOCGIO:
s = ((struct io_desc *)data)->window;
if (s < 0 || s >= slt->ctrl->maxio)
return (EINVAL);
ip = &slt->io[s];
((struct io_desc *)data)->flags = ip->flags;
((struct io_desc *)data)->start = ip->start;
((struct io_desc *)data)->size = ip->size;
break;
/*
* Set I/O port context.
*/
case PIOCSIO:
if (suser(p))
return (EPERM);
if (slt->state != filled)
return (ENXIO);
s = ((struct io_desc *)data)->window;
if (s < 0 || s >= slt->ctrl->maxio)
return (EINVAL);
slt->io[s] = *((struct io_desc *)data);
/* XXX Don't actually map */
return (0);
break;
/*
* Set memory window flags for read/write interface.
*/
case PIOCRWFLAG:
slt->rwmem = *(int *)data;
break;
/*
* Set the memory window to be used for the read/write interface.
* Not available on the alpha.
*/
case PIOCRWMEM:
if (*(unsigned long *)data == 0) {
*(unsigned long *)data = pccard_mem;
break;
}
if (suser(p))
return (EPERM);
/*
* Validate the memory by checking it against the I/O
* memory range. It must also start on an aligned block size.
*/
if (*(unsigned long *)data & (PCCARD_MEMSIZE-1))
return (EINVAL);
pccarddev = PCCARD_DEV2SOFTC(dev)->dev;
pccard_mem_rid = 0;
addr = *(unsigned long *)data;
if (pccard_mem_res)
bus_release_resource(pccarddev, SYS_RES_MEMORY,
pccard_mem_rid, pccard_mem_res);
pccard_mem_res = bus_alloc_resource(pccarddev, SYS_RES_MEMORY,
&pccard_mem_rid, addr, addr, PCCARD_MEMSIZE,
RF_ACTIVE | rman_make_alignment_flags(PCCARD_MEMSIZE));
if (pccard_mem_res == NULL)
return (EINVAL);
pccard_mem = rman_get_start(pccard_mem_res);
pccard_kmem = rman_get_virtual(pccard_mem_res);
break;
/*
* Set power values.
*/
case PIOCSPOW:
slt->pwr = *(struct power *)data;
return (slt->ctrl->power(slt));
/*
* Allocate a driver to this slot.
*/
case PIOCSDRV:
if (suser(p))
return (EPERM);
err = allocate_driver(slt, (struct dev_desc *)data);
if (!err)
pccard_success_beep();
else
pccard_failure_beep();
return (err);
/*
* Virtual removal/insertion
*/
case PIOCSVIR:
pwval = *(int *)data;
if (!pwval) {
if (slt->state != filled)
return (EINVAL);
pccard_event(slt, card_deactivated);
} else {
if (slt->state != empty && slt->state != inactive)
return (EINVAL);
pccard_event(slt, card_inserted);
}
break;
case PIOCSBEEP:
if (pccard_beep_select(*(int *)data)) {
return (EINVAL);
}
break;
}
return (0);
}
/*
* poll - Poll on exceptions will return true
* when a change in card status occurs.
*/
static int
crdpoll(dev_t dev, int events, struct proc *p)
{
int revents = 0;
int s;
struct slot *slt = PCCARD_DEV2SOFTC(dev);
if (events & (POLLIN | POLLRDNORM))
revents |= events & (POLLIN | POLLRDNORM);
if (events & (POLLOUT | POLLWRNORM))
revents |= events & (POLLIN | POLLRDNORM);
s = splhigh();
/*
* select for exception - card event.
*/
if (events & POLLRDBAND)
if (slt == 0 || slt->laststate != slt->state)
revents |= POLLRDBAND;
if (revents == 0)
selrecord(p, &slt->selp);
splx(s);
return (revents);
}
/*
* APM hooks for suspending and resuming.
*/
int
pccard_suspend(device_t dev)
{
struct slot *slt = PCCARD_DEVICE2SOFTC(dev);
/* This code stolen from pccard_event:card_removed */
if (slt->state == filled) {
int s = splhigh(); /* nop on current */
disable_slot(slt);
slt->laststate = suspend; /* for pccardd */
slt->state = empty;
splx(s);
printf("pccard: card disabled, slot %d\n", slt->slotnum);
}
/*
* Disable any pending timeouts for this slot since we're
* powering it down/disabling now.
*/
untimeout(power_off_slot, (caddr_t)slt, slt->poff_ch);
slt->ctrl->disable(slt);
return (0);
}
int
pccard_resume(device_t dev)
{
struct slot *slt = PCCARD_DEVICE2SOFTC(dev);
slt->ctrl->resume(slt);
return (0);
}
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