628 lines
19 KiB
C
628 lines
19 KiB
C
/* $FreeBSD$ */
|
||
|
||
/*
|
||
* Copyright (c) 2002 M Warner Losh. 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.
|
||
*
|
||
* 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.
|
||
*
|
||
* This software may be derived from NetBSD i82365.c and other files with
|
||
* the following copyright:
|
||
*
|
||
* Copyright (c) 1997 Marc Horowitz. 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. All advertising materials mentioning features or use of this software
|
||
* must display the following acknowledgement:
|
||
* This product includes software developed by Marc Horowitz.
|
||
* 4. 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.
|
||
*/
|
||
|
||
#include <sys/param.h>
|
||
#include <sys/systm.h>
|
||
#include <sys/errno.h>
|
||
#include <sys/kernel.h>
|
||
#include <sys/malloc.h>
|
||
#include <sys/queue.h>
|
||
#include <sys/module.h>
|
||
#include <sys/conf.h>
|
||
|
||
#include <sys/bus.h>
|
||
#include <machine/bus.h>
|
||
#include <sys/rman.h>
|
||
#include <machine/resource.h>
|
||
|
||
#include <dev/pccard/pccardreg.h>
|
||
#include <dev/pccard/pccardvar.h>
|
||
|
||
#include <dev/exca/excareg.h>
|
||
#include <dev/exca/excavar.h>
|
||
|
||
#ifdef EXCA_DEBUG
|
||
#define DEVPRINTF(dev, fmt, args...) device_printf((dev), (fmt), ## args)
|
||
#define DPRINTF(fmt, args...) printf(fmt, ## args)
|
||
#else
|
||
#define DEVPRINTF(dev, fmt, args...)
|
||
#define DPRINTF(fmt, args...)
|
||
#endif
|
||
|
||
/* memory */
|
||
|
||
#define EXCA_MEMINFO(NUM) { \
|
||
EXCA_SYSMEM_ADDR ## NUM ## _START_LSB, \
|
||
EXCA_SYSMEM_ADDR ## NUM ## _START_MSB, \
|
||
EXCA_SYSMEM_ADDR ## NUM ## _STOP_LSB, \
|
||
EXCA_SYSMEM_ADDR ## NUM ## _STOP_MSB, \
|
||
EXCA_SYSMEM_ADDR ## NUM ## _WIN, \
|
||
EXCA_CARDMEM_ADDR ## NUM ## _LSB, \
|
||
EXCA_CARDMEM_ADDR ## NUM ## _MSB, \
|
||
EXCA_ADDRWIN_ENABLE_MEM ## NUM, \
|
||
}
|
||
|
||
static struct mem_map_index_st {
|
||
int sysmem_start_lsb;
|
||
int sysmem_start_msb;
|
||
int sysmem_stop_lsb;
|
||
int sysmem_stop_msb;
|
||
int sysmem_win;
|
||
int cardmem_lsb;
|
||
int cardmem_msb;
|
||
int memenable;
|
||
} mem_map_index[] = {
|
||
EXCA_MEMINFO(0),
|
||
EXCA_MEMINFO(1),
|
||
EXCA_MEMINFO(2),
|
||
EXCA_MEMINFO(3),
|
||
EXCA_MEMINFO(4)
|
||
};
|
||
#undef EXCA_MEMINFO
|
||
|
||
/*
|
||
* Helper function. This will map the requested memory slot. We setup the
|
||
* map before we call this function. This is used to initially force the
|
||
* mapping, as well as later restore the mapping after it has been destroyed
|
||
* in some fashion (due to a power event typically).
|
||
*/
|
||
static void
|
||
exca_do_mem_map(struct exca_softc *sc, int win)
|
||
{
|
||
struct mem_map_index_st *map;
|
||
struct pccard_mem_handle *mem;
|
||
|
||
map = &mem_map_index[win];
|
||
mem = &sc->mem[win];
|
||
exca_write(sc, map->sysmem_start_lsb,
|
||
(mem->addr >> EXCA_SYSMEM_ADDRX_SHIFT) & 0xff);
|
||
exca_write(sc, map->sysmem_start_msb,
|
||
((mem->addr >> (EXCA_SYSMEM_ADDRX_SHIFT + 8)) &
|
||
EXCA_SYSMEM_ADDRX_START_MSB_ADDR_MASK) | 0x80);
|
||
|
||
exca_write(sc, map->sysmem_stop_lsb,
|
||
((mem->addr + mem->realsize - 1) >>
|
||
EXCA_SYSMEM_ADDRX_SHIFT) & 0xff);
|
||
exca_write(sc, map->sysmem_stop_msb,
|
||
(((mem->addr + mem->realsize - 1) >>
|
||
(EXCA_SYSMEM_ADDRX_SHIFT + 8)) &
|
||
EXCA_SYSMEM_ADDRX_STOP_MSB_ADDR_MASK) |
|
||
EXCA_SYSMEM_ADDRX_STOP_MSB_WAIT2);
|
||
|
||
exca_write(sc, map->sysmem_win,
|
||
(mem->addr >> EXCA_MEMREG_WIN_SHIFT) & 0xff);
|
||
|
||
exca_write(sc, map->cardmem_lsb,
|
||
(mem->offset >> EXCA_CARDMEM_ADDRX_SHIFT) & 0xff);
|
||
exca_write(sc, map->cardmem_msb,
|
||
((mem->offset >> (EXCA_CARDMEM_ADDRX_SHIFT + 8)) &
|
||
EXCA_CARDMEM_ADDRX_MSB_ADDR_MASK) |
|
||
((mem->kind == PCCARD_MEM_ATTR) ?
|
||
EXCA_CARDMEM_ADDRX_MSB_REGACTIVE_ATTR : 0));
|
||
|
||
exca_setb(sc, EXCA_ADDRWIN_ENABLE, EXCA_ADDRWIN_ENABLE_MEMCS16 |
|
||
map->memenable);
|
||
|
||
DELAY(100);
|
||
#ifdef EXCA_DEBUG
|
||
{
|
||
int r1, r2, r3, r4, r5, r6, r7;
|
||
r1 = exca_read(sc, map->sysmem_start_msb);
|
||
r2 = exca_read(sc, map->sysmem_start_lsb);
|
||
r3 = exca_read(sc, map->sysmem_stop_msb);
|
||
r4 = exca_read(sc, map->sysmem_stop_lsb);
|
||
r5 = exca_read(sc, map->cardmem_msb);
|
||
r6 = exca_read(sc, map->cardmem_lsb);
|
||
r7 = exca_read(sc, map->sysmem_win);
|
||
printf("exca_do_mem_map window %d: %02x%02x %02x%02x "
|
||
"%02x%02x %02x (%08x+%08x.%08x*%08lx)\n",
|
||
win, r1, r2, r3, r4, r5, r6, r7,
|
||
mem->addr, mem->size, mem->realsize,
|
||
mem->offset);
|
||
}
|
||
#endif
|
||
}
|
||
|
||
/*
|
||
* public interface to map a resource. kind is the type of memory to
|
||
* map (either common or attribute). Memory created via this interface
|
||
* starts out at card address 0. Since the only way to set this is
|
||
* to set it on a struct resource after it has been mapped, we're safe
|
||
* in maping this assumption. Note that resources can be remapped using
|
||
* exca_do_mem_map so that's how the card address can be set later.
|
||
*/
|
||
int
|
||
exca_mem_map(struct exca_softc *sc, int kind, struct resource *res)
|
||
{
|
||
int win;
|
||
|
||
for (win = 0; win < EXCA_MEM_WINS; win++) {
|
||
if ((sc->memalloc & (1 << win)) == 0) {
|
||
sc->memalloc |= (1 << win);
|
||
break;
|
||
}
|
||
}
|
||
if (win >= EXCA_MEM_WINS)
|
||
return (1);
|
||
if (((rman_get_start(res) >> EXCA_CARDMEM_ADDRX_SHIFT) & 0xff) != 0 &&
|
||
(sc->flags & EXCA_HAS_MEMREG_WIN) == 0) {
|
||
device_printf(sc->dev, "Does not support mapping above 24M.");
|
||
return (1);
|
||
}
|
||
|
||
sc->mem[win].cardaddr = 0;
|
||
sc->mem[win].memt = rman_get_bustag(res);
|
||
sc->mem[win].memh = rman_get_bushandle(res);
|
||
sc->mem[win].addr = rman_get_start(res);
|
||
sc->mem[win].size = rman_get_end(res) - sc->mem[win].addr + 1;
|
||
sc->mem[win].realsize = sc->mem[win].size + EXCA_MEM_PAGESIZE - 1;
|
||
sc->mem[win].realsize = sc->mem[win].realsize -
|
||
(sc->mem[win].realsize % EXCA_MEM_PAGESIZE);
|
||
sc->mem[win].offset = (long)(sc->mem[win].addr);
|
||
sc->mem[win].kind = kind;
|
||
DPRINTF("exca_mem_map window %d bus %x+%x+%lx card addr %x\n",
|
||
win, sc->mem[win].addr, sc->mem[win].size,
|
||
sc->mem[win].offset, sc->mem[win].cardaddr);
|
||
exca_do_mem_map(sc, win);
|
||
|
||
return (0);
|
||
}
|
||
|
||
/*
|
||
* Private helper function. This turns off a given memory map that is in
|
||
* use. We do this by just clearing the enable bit in the pcic. If we needed
|
||
* to make memory unmapping/mapping pairs faster, we would have to store
|
||
* more state information about the pcic and then use that to intelligently
|
||
* to the map/unmap. However, since we don't do that sort of thing often
|
||
* (generally just at configure time), it isn't a case worth optimizing.
|
||
*/
|
||
static void
|
||
exca_mem_unmap(struct exca_softc *sc, int window)
|
||
{
|
||
if (window < 0 || window >= EXCA_MEM_WINS)
|
||
panic("exca_mem_unmap: window out of range");
|
||
|
||
exca_clrb(sc, EXCA_ADDRWIN_ENABLE, mem_map_index[window].memenable);
|
||
sc->memalloc &= ~(1 << window);
|
||
}
|
||
|
||
/*
|
||
* Find the map that we're using to hold the resoruce. This works well
|
||
* so long as the client drivers don't do silly things like map the same
|
||
* area mutliple times, or map both common and attribute memory at the
|
||
* same time. This latter restriction is a bug. We likely should just
|
||
* store a pointer to the res in the mem[x] data structure.
|
||
*/
|
||
static int
|
||
exca_mem_findmap(struct exca_softc *sc, struct resource *res)
|
||
{
|
||
int win;
|
||
|
||
for (win = 0; win < EXCA_MEM_WINS; win++) {
|
||
if (sc->mem[win].memt == rman_get_bustag(res) &&
|
||
sc->mem[win].addr == rman_get_start(res) &&
|
||
sc->mem[win].size == rman_get_size(res))
|
||
return (win);
|
||
}
|
||
return (-1);
|
||
}
|
||
|
||
/*
|
||
* Set the memory flag. This means that we are setting if the memory
|
||
* is coming from attribute memory or from common memory on the card.
|
||
* CIS entries are generally in attribute memory (although they can
|
||
* reside in common memory). Generally, this is the only use for attribute
|
||
* memory. However, some cards require their drivers to dance in both
|
||
* common and/or attribute memory and this interface (and setting the
|
||
* offset interface) exist for such cards.
|
||
*/
|
||
int
|
||
exca_mem_set_flags(struct exca_softc *sc, struct resource *res, uint32_t flags)
|
||
{
|
||
int win;
|
||
|
||
win = exca_mem_findmap(sc, res);
|
||
if (win < 0) {
|
||
device_printf(sc->dev,
|
||
"set_res_flags: specified resource not active\n");
|
||
return (ENOENT);
|
||
}
|
||
|
||
sc->mem[win].kind = flags;
|
||
exca_do_mem_map(sc, win);
|
||
return (0);
|
||
}
|
||
|
||
/*
|
||
* Given a resource, go ahead and unmap it if we can find it in the
|
||
* resrouce list that's used.
|
||
*/
|
||
int
|
||
exca_mem_unmap_res(struct exca_softc *sc, struct resource *res)
|
||
{
|
||
int win;
|
||
|
||
win = exca_mem_findmap(sc, res);
|
||
if (win < 0)
|
||
return (ENOENT);
|
||
exca_mem_unmap(sc, win);
|
||
return (0);
|
||
}
|
||
|
||
/*
|
||
* Set the offset of the memory. We use this for reading the CIS and
|
||
* frobbing the pccard's pccard registers (POR, etc). Some drivers
|
||
* need to access this functionality as well, since they have receive
|
||
* buffers defined in the attribute memory. Thankfully, these cards
|
||
* are few and fare between. Some cards also have common memory that
|
||
* is large and only map a small portion of it at a time (but these cards
|
||
* are rare, the more common case being to have just a small amount
|
||
* of common memory that the driver needs to bcopy data from in order to
|
||
* get at it.
|
||
*/
|
||
int
|
||
exca_mem_set_offset(struct exca_softc *sc, struct resource *res,
|
||
uint32_t cardaddr, uint32_t *deltap)
|
||
{
|
||
int win;
|
||
uint32_t delta;
|
||
|
||
win = exca_mem_findmap(sc, res);
|
||
if (win < 0) {
|
||
device_printf(sc->dev,
|
||
"set_memory_offset: specified resource not active\n");
|
||
return (ENOENT);
|
||
}
|
||
sc->mem[win].cardaddr = cardaddr;
|
||
delta = cardaddr % EXCA_MEM_PAGESIZE;
|
||
if (deltap)
|
||
*deltap = delta;
|
||
cardaddr -= delta;
|
||
sc->mem[win].realsize = sc->mem[win].size + delta +
|
||
EXCA_MEM_PAGESIZE - 1;
|
||
sc->mem[win].realsize = sc->mem[win].realsize -
|
||
(sc->mem[win].realsize % EXCA_MEM_PAGESIZE);
|
||
sc->mem[win].offset = cardaddr - sc->mem[win].addr;
|
||
exca_do_mem_map(sc, win);
|
||
return (0);
|
||
}
|
||
|
||
|
||
/* I/O */
|
||
|
||
#define EXCA_IOINFO(NUM) { \
|
||
EXCA_IOADDR ## NUM ## _START_LSB, \
|
||
EXCA_IOADDR ## NUM ## _START_MSB, \
|
||
EXCA_IOADDR ## NUM ## _STOP_LSB, \
|
||
EXCA_IOADDR ## NUM ## _STOP_MSB, \
|
||
EXCA_ADDRWIN_ENABLE_IO ## NUM, \
|
||
EXCA_IOCTL_IO ## NUM ## _WAITSTATE \
|
||
| EXCA_IOCTL_IO ## NUM ## _ZEROWAIT \
|
||
| EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_MASK \
|
||
| EXCA_IOCTL_IO ## NUM ## _DATASIZE_MASK, \
|
||
{ \
|
||
EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_CARD, \
|
||
EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_DATASIZE \
|
||
| EXCA_IOCTL_IO ## NUM ## _DATASIZE_8BIT, \
|
||
EXCA_IOCTL_IO ## NUM ## _IOCS16SRC_DATASIZE \
|
||
| EXCA_IOCTL_IO ## NUM ## _DATASIZE_16BIT, \
|
||
} \
|
||
}
|
||
|
||
static struct io_map_index_st {
|
||
int start_lsb;
|
||
int start_msb;
|
||
int stop_lsb;
|
||
int stop_msb;
|
||
int ioenable;
|
||
int ioctlmask;
|
||
int ioctlbits[3]; /* indexed by PCCARD_WIDTH_* */
|
||
} io_map_index[] = {
|
||
EXCA_IOINFO(0),
|
||
EXCA_IOINFO(1),
|
||
};
|
||
#undef EXCA_IOINFO
|
||
|
||
static void
|
||
exca_do_io_map(struct exca_softc *sc, int win)
|
||
{
|
||
struct io_map_index_st *map;
|
||
|
||
struct pccard_io_handle *io;
|
||
|
||
map = &io_map_index[win];
|
||
io = &sc->io[win];
|
||
exca_write(sc, map->start_lsb, io->addr & 0xff);
|
||
exca_write(sc, map->start_msb, (io->addr >> 8) & 0xff);
|
||
|
||
exca_write(sc, map->stop_lsb, (io->addr + io->size - 1) & 0xff);
|
||
exca_write(sc, map->stop_msb, ((io->addr + io->size - 1) >> 8) & 0xff);
|
||
|
||
exca_clrb(sc, EXCA_IOCTL, map->ioctlmask);
|
||
exca_setb(sc, EXCA_IOCTL, map->ioctlbits[io->width]);
|
||
|
||
exca_setb(sc, EXCA_ADDRWIN_ENABLE, map->ioenable);
|
||
#ifdef EXCA_DEBUG
|
||
{
|
||
int r1, r2, r3, r4;
|
||
r1 = exca_read(sc, map->start_msb);
|
||
r2 = exca_read(sc, map->start_lsb);
|
||
r3 = exca_read(sc, map->stop_msb);
|
||
r4 = exca_read(sc, map->stop_lsb);
|
||
DPRINTF("exca_do_io_map window %d: %02x%02x %02x%02x "
|
||
"(%08x+%08x)\n", win, r1, r2, r3, r4,
|
||
io->addr, io->size);
|
||
}
|
||
#endif
|
||
}
|
||
|
||
int
|
||
exca_io_map(struct exca_softc *sc, int width, struct resource *r)
|
||
{
|
||
int win;
|
||
#ifdef EXCA_DEBUG
|
||
static char *width_names[] = { "auto", "io8", "io16"};
|
||
#endif
|
||
for (win=0; win < EXCA_IO_WINS; win++) {
|
||
if ((sc->ioalloc & (1 << win)) == 0) {
|
||
sc->ioalloc |= (1 << win);
|
||
break;
|
||
}
|
||
}
|
||
if (win >= EXCA_IO_WINS)
|
||
return (1);
|
||
|
||
sc->io[win].iot = rman_get_bustag(r);
|
||
sc->io[win].ioh = rman_get_bushandle(r);
|
||
sc->io[win].addr = rman_get_start(r);
|
||
sc->io[win].size = rman_get_end(r) - sc->io[win].addr + 1;
|
||
sc->io[win].flags = 0;
|
||
sc->io[win].width = width;
|
||
DPRINTF("exca_io_map window %d %s port %x+%x\n",
|
||
win, width_names[width], sc->io[win].addr,
|
||
sc->io[win].size);
|
||
exca_do_io_map(sc, win);
|
||
|
||
return (0);
|
||
}
|
||
|
||
static void
|
||
exca_io_unmap(struct exca_softc *sc, int window)
|
||
{
|
||
if (window >= EXCA_IO_WINS)
|
||
panic("exca_io_unmap: window out of range");
|
||
|
||
exca_clrb(sc, EXCA_ADDRWIN_ENABLE, io_map_index[window].ioenable);
|
||
|
||
sc->ioalloc &= ~(1 << window);
|
||
|
||
sc->io[window].iot = 0;
|
||
sc->io[window].ioh = 0;
|
||
sc->io[window].addr = 0;
|
||
sc->io[window].size = 0;
|
||
sc->io[window].flags = 0;
|
||
sc->io[window].width = 0;
|
||
}
|
||
|
||
static int
|
||
exca_io_findmap(struct exca_softc *sc, struct resource *res)
|
||
{
|
||
int win;
|
||
|
||
for (win = 0; win < EXCA_IO_WINS; win++) {
|
||
if (sc->io[win].iot == rman_get_bustag(res) &&
|
||
sc->io[win].addr == rman_get_start(res) &&
|
||
sc->io[win].size == rman_get_size(res))
|
||
return (win);
|
||
}
|
||
return (-1);
|
||
}
|
||
|
||
|
||
int
|
||
exca_io_unmap_res(struct exca_softc *sc, struct resource *res)
|
||
{
|
||
int win;
|
||
|
||
win = exca_io_findmap(sc, res);
|
||
if (win < 0)
|
||
return (ENOENT);
|
||
exca_io_unmap(sc, win);
|
||
return (0);
|
||
}
|
||
|
||
/* Misc */
|
||
|
||
/*
|
||
* If interrupts are enabled, then we should be able to just wait for
|
||
* an interrupt routine to wake us up. Busy waiting shouldn't be
|
||
* necessary. Sadly, not all legacy ISA cards support an interrupt
|
||
* for the busy state transitions, at least according to their datasheets,
|
||
* so we busy wait a while here..
|
||
*/
|
||
static void
|
||
exca_wait_ready(struct exca_softc *sc)
|
||
{
|
||
int i;
|
||
DEVPRINTF(sc->dev, "exca_wait_ready: status 0x%02x\n",
|
||
exca_read(sc, EXCA_IF_STATUS));
|
||
for (i = 0; i < 10000; i++) {
|
||
if (exca_read(sc, EXCA_IF_STATUS) & EXCA_IF_STATUS_READY)
|
||
return;
|
||
DELAY(500);
|
||
}
|
||
device_printf(sc->dev, "ready never happened, status = %02x\n",
|
||
exca_read(sc, EXCA_IF_STATUS));
|
||
}
|
||
|
||
/*
|
||
* Reset the card. Ideally, we'd do a lot of this via interrupts.
|
||
* However, many PC Cards will deassert the ready signal. This means
|
||
* that they are asserting an interrupt. This makes it hard to
|
||
* do anything but a busy wait here. One could argue that these
|
||
* such cards are broken, or that the bridge that allows this sort
|
||
* of interrupt through isn't quite what you'd want (and may be a standards
|
||
* violation). However, such arguing would leave a huge class of pc cards
|
||
* and bridges out of reach for use in the system.
|
||
*
|
||
* Maybe I should reevaluate the above based on the power bug I fixed
|
||
* in OLDCARD.
|
||
*/
|
||
void
|
||
exca_reset(struct exca_softc *sc, device_t child)
|
||
{
|
||
int cardtype;
|
||
int win;
|
||
|
||
/* enable socket i/o */
|
||
exca_setb(sc, EXCA_PWRCTL, EXCA_PWRCTL_OE);
|
||
|
||
exca_write(sc, EXCA_INTR, EXCA_INTR_ENABLE);
|
||
/* hold reset for 30ms */
|
||
DELAY(30*1000);
|
||
/* clear the reset flag */
|
||
exca_setb(sc, EXCA_INTR, EXCA_INTR_RESET);
|
||
/* wait 20ms as per pc card standard (r2.01) section 4.3.6 */
|
||
DELAY(20*1000);
|
||
|
||
exca_wait_ready(sc);
|
||
|
||
/* disable all address windows */
|
||
exca_write(sc, EXCA_ADDRWIN_ENABLE, 0);
|
||
|
||
CARD_GET_TYPE(child, &cardtype);
|
||
exca_setb(sc, EXCA_INTR, (cardtype == PCCARD_IFTYPE_IO) ?
|
||
EXCA_INTR_CARDTYPE_IO : EXCA_INTR_CARDTYPE_MEM);
|
||
DEVPRINTF(sc->dev, "card type is %s\n",
|
||
(cardtype == PCCARD_IFTYPE_IO) ? "io" : "mem");
|
||
|
||
/* reinstall all the memory and io mappings */
|
||
for (win = 0; win < EXCA_MEM_WINS; ++win)
|
||
if (sc->memalloc & (1 << win))
|
||
exca_do_mem_map(sc, win);
|
||
for (win = 0; win < EXCA_IO_WINS; ++win)
|
||
if (sc->ioalloc & (1 << win))
|
||
exca_do_io_map(sc, win);
|
||
}
|
||
|
||
/*
|
||
* Initialize the exca_softc data structure for the first time.
|
||
*/
|
||
void
|
||
exca_init(struct exca_softc *sc, device_t dev,
|
||
bus_space_tag_t bst, bus_space_handle_t bsh, uint32_t offset)
|
||
{
|
||
sc->dev = dev;
|
||
sc->memalloc = 0;
|
||
sc->ioalloc = 0;
|
||
sc->bst = bst;
|
||
sc->bsh = bsh;
|
||
sc->offset = offset;
|
||
sc->flags = 0;
|
||
}
|
||
|
||
/*
|
||
* Probe the expected slots. We maybe should set the ID for each of these
|
||
* slots too while we're at it. But maybe that belongs to a separate
|
||
* function.
|
||
*
|
||
* Callers must charantee that there are at least EXCA_NSLOTS (4) in
|
||
* the array that they pass the address of the first element in the
|
||
* "exca" parameter.
|
||
*/
|
||
int
|
||
exca_probe_slots(device_t dev, struct exca_softc *exca)
|
||
{
|
||
int rid;
|
||
struct resource *res;
|
||
int err;
|
||
bus_space_tag_t iot;
|
||
bus_space_handle_t ioh;
|
||
int i;
|
||
|
||
err = ENXIO;
|
||
rid = 0;
|
||
res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, EXCA_IOSIZE,
|
||
RF_ACTIVE);
|
||
if (res == NULL)
|
||
return (ENXIO);
|
||
iot = rman_get_bustag(res);
|
||
ioh = rman_get_bushandle(res);
|
||
for (i = 0; i < EXCA_NSLOTS; i++) {
|
||
exca_init(&exca[i], dev, iot, ioh, i * EXCA_SOCKET_SIZE);
|
||
if (exca_is_pcic(&exca[i])) {
|
||
err = 0;
|
||
exca[i].flags |= EXCA_SOCKET_PRESENT;
|
||
}
|
||
}
|
||
bus_release_resource(dev, SYS_RES_IOPORT, rid, res);
|
||
return (err);
|
||
}
|
||
|
||
int
|
||
exca_is_pcic(struct exca_softc *sc)
|
||
{
|
||
/* XXX */
|
||
return (0);
|
||
}
|
||
|
||
static int exca_modevent(module_t mod, int cmd, void *arg)
|
||
{
|
||
return 0;
|
||
}
|
||
DEV_MODULE(exca, exca_modevent, NULL);
|
||
MODULE_VERSION(exca, 1);
|