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xserver/hw/xfree86/os-support/bsd/arm_video.c

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/*
* Copyright 1992 by Rich Murphey <Rich@Rice.edu>
* Copyright 1993 by David Wexelblat <dwex@goblin.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the names of Rich Murphey and David Wexelblat
* not be used in advertising or publicity pertaining to distribution of
* the software without specific, written prior permission. Rich Murphey and
* David Wexelblat make no representations about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* RICH MURPHEY AND DAVID WEXELBLAT DISCLAIM ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL RICH MURPHEY OR DAVID WEXELBLAT BE LIABLE FOR
* ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
/*
* The ARM32 code here carries the following copyright:
*
* Copyright 1997
* Digital Equipment Corporation. All rights reserved.
* This software is furnished under license and may be used and copied only in
* accordance with the following terms and conditions. Subject to these
* conditions, you may download, copy, install, use, modify and distribute
* this software in source and/or binary form. No title or ownership is
* transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce and retain
* this copyright notice and list of conditions as they appear in the
* source file.
*
* 2) No right is granted to use any trade name, trademark, or logo of Digital
* Equipment Corporation. Neither the "Digital Equipment Corporation"
* name nor any trademark or logo of Digital Equipment Corporation may be
* used to endorse or promote products derived from this software without
* the prior written permission of Digital Equipment Corporation.
*
* 3) This software is provided "AS-IS" and any express or implied warranties,
* including but not limited to, any implied warranties of merchantability,
* fitness for a particular purpose, or non-infringement are disclaimed.
* In no event shall DIGITAL be liable for any damages whatsoever, and in
* particular, DIGITAL shall not be liable for special, indirect,
* consequential, or incidental damages or damages for lost profits, loss
* of revenue or loss of use, whether such damages arise in contract,
* negligence, tort, under statute, in equity, at law or otherwise, even
* if advised of the possibility of such damage.
*
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <X11/X.h>
#include "xf86.h"
#include "xf86Priv.h"
#include "xf86_OSlib.h"
#include "xf86OSpriv.h"
#ifdef __arm32__
#include "machine/devmap.h"
struct memAccess {
int ioctl;
struct map_info memInfo;
void *regionVirtBase;
Bool Checked;
Bool OK;
};
static void *xf86MapInfoMap();
static void xf86MapInfoUnmap();
static struct memAccess *checkMapInfo();
extern int vgaPhysLinearBase;
/* A memAccess structure is needed for each possible region */
struct memAccess vgaMemInfo = { CONSOLE_GET_MEM_INFO, NULL, NULL,
FALSE, FALSE
};
struct memAccess linearMemInfo = { CONSOLE_GET_LINEAR_INFO, NULL, NULL,
FALSE, FALSE
};
struct memAccess ioMemInfo = { CONSOLE_GET_IO_INFO, NULL, NULL,
FALSE, FALSE
};
#endif /* __arm32__ */
#if defined(__NetBSD__) && !defined(MAP_FILE)
#define MAP_FLAGS MAP_SHARED
#else
#define MAP_FLAGS (MAP_FILE | MAP_SHARED)
#endif
#define BUS_BASE 0L
#define BUS_BASE_BWX 0L
/***************************************************************************/
/* Video Memory Mapping section */
/***************************************************************************/
static Bool useDevMem = FALSE;
static int devMemFd = -1;
static void *mapVidMem(int, unsigned long, unsigned long, int);
static void unmapVidMem(int, void *, unsigned long);
/*
* Check if /dev/mem can be mmap'd. If it can't print a warning when
* "warn" is TRUE.
*/
static void
checkDevMem(Bool warn)
{
static Bool devMemChecked = FALSE;
int fd;
void *base;
if (devMemChecked)
return;
devMemChecked = TRUE;
if ((fd = open(DEV_MEM, O_RDWR)) >= 0) {
/* Try to map a page at the VGA address */
base = mmap((caddr_t) 0, 4096, PROT_READ | PROT_WRITE,
MAP_FLAGS, fd, (off_t) 0xA0000 + BUS_BASE);
if (base != MAP_FAILED) {
munmap((caddr_t) base, 4096);
devMemFd = fd;
useDevMem = TRUE;
return;
}
else {
/* This should not happen */
if (warn) {
xf86Msg(X_WARNING, "checkDevMem: failed to mmap %s (%s)\n",
DEV_MEM, strerror(errno));
}
useDevMem = FALSE;
return;
}
}
if (warn) {
xf86Msg(X_WARNING, "checkDevMem: failed to open %s (%s)\n",
DEV_MEM, strerror(errno));
}
useDevMem = FALSE;
return;
}
void
xf86OSInitVidMem(VidMemInfoPtr pVidMem)
{
checkDevMem(TRUE);
pVidMem->linearSupported = useDevMem;
pVidMem->mapMem = armMapVidMem;
pVidMem->unmapVidMem = armUnmapVidMem;
pVidMem->initialised = TRUE;
}
static void *
mapVidMem(int ScreenNum, unsigned long Base, unsigned long Size, int flags)
{
void *base;
checkDevMem(FALSE);
if (useDevMem) {
if (devMemFd < 0) {
FatalError("xf86MapVidMem: failed to open %s (%s)\n",
DEV_MEM, strerror(errno));
}
base = mmap((caddr_t) 0, Size,
(flags & VIDMEM_READONLY) ?
PROT_READ : (PROT_READ | PROT_WRITE),
MAP_FLAGS, devMemFd, (off_t) Base + BUS_BASE_BWX);
if (base == MAP_FAILED) {
FatalError("%s: could not mmap %s [s=%x,a=%x] (%s)\n",
"xf86MapVidMem", DEV_MEM, Size, Base, strerror(errno));
}
return base;
}
/* else, mmap /dev/vga */
if ((unsigned long) Base < 0xA0000 || (unsigned long) Base >= 0xC0000) {
FatalError("%s: Address 0x%x outside allowable range\n",
"xf86MapVidMem", Base);
}
base = mmap(0, Size,
(flags & VIDMEM_READONLY) ?
PROT_READ : (PROT_READ | PROT_WRITE),
MAP_FLAGS, xf86Info.consoleFd, (unsigned long) Base - 0xA0000);
if (base == MAP_FAILED) {
FatalError("xf86MapVidMem: Could not mmap /dev/vga (%s)\n",
strerror(errno));
}
return base;
}
static void
unmapVidMem(int ScreenNum, void *Base, unsigned long Size)
{
munmap((caddr_t) Base, Size);
}
/*
* Read BIOS via mmap()ing DEV_MEM
*/
int
xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf,
int Len)
{
unsigned char *ptr;
int psize;
int mlen;
checkDevMem(TRUE);
if (devMemFd == -1) {
return -1;
}
psize = getpagesize();
Offset += Base & (psize - 1);
Base &= ~(psize - 1);
mlen = (Offset + Len + psize - 1) & ~(psize - 1);
ptr = (unsigned char *) mmap((caddr_t) 0, mlen, PROT_READ,
MAP_SHARED, devMemFd, (off_t) Base + BUS_BASE);
if ((long) ptr == -1) {
xf86Msg(X_WARNING,
"xf86ReadBIOS: %s mmap[s=%x,a=%x,o=%x] failed (%s)\n",
DEV_MEM, Len, Base, Offset, strerror(errno));
return -1;
}
#ifdef DEBUG
ErrorF("xf86ReadBIOS: BIOS at 0x%08x has signature 0x%04x\n",
Base, ptr[0] | (ptr[1] << 8));
#endif
(void) memcpy(Buf, (void *) (ptr + Offset), Len);
(void) munmap((caddr_t) ptr, mlen);
#ifdef DEBUG
xf86MsgVerb(X_INFO, 3, "xf86ReadBIOS(%x, %x, Buf, %x)"
"-> %02x %02x %02x %02x...\n",
Base, Offset, Len, Buf[0], Buf[1], Buf[2], Buf[3]);
#endif
return Len;
}
/* XXX This needs to be updated for the ND */
/*
** Find out whether the console driver provides memory mapping information
** for the specified region and return the map_info pointer. Print a warning if required.
*/
static struct memAccess *
checkMapInfo(Bool warn, int Region)
{
struct memAccess *memAccP;
switch (Region) {
case VGA_REGION:
memAccP = &vgaMemInfo;
break;
case LINEAR_REGION:
memAccP = &linearMemInfo;
break;
case MMIO_REGION:
memAccP = &ioMemInfo;
break;
default:
return NULL;
break;
}
if (!memAccP->Checked) {
if (ioctl(xf86Info.consoleFd, memAccP->ioctl, &(memAccP->memInfo)) ==
-1) {
if (warn) {
xf86Msg(X_WARNING,
"checkMapInfo: failed to get map info for region %d\n\t(%s)\n",
Region, strerror(errno));
}
}
else {
if (memAccP->memInfo.u.map_info_mmap.map_offset != MAP_INFO_UNKNOWN)
memAccP->OK = TRUE;
}
memAccP->Checked = TRUE;
}
if (memAccP->OK) {
return memAccP;
}
else {
return NULL;
}
}
static void *
xf86MapInfoMap(struct memAccess *memInfoP, void *Base, unsigned long Size)
{
struct map_info *mapInfoP = &(memInfoP->memInfo);
if (mapInfoP->u.map_info_mmap.map_size == MAP_INFO_UNKNOWN) {
Size = (unsigned long) Base + Size;
}
else {
Size = mapInfoP->u.map_info_mmap.map_size;
}
switch (mapInfoP->method) {
case MAP_MMAP:
/* Need to remap if size is unknown because we may not have
mapped the whole region initially */
if (memInfoP->regionVirtBase == NULL ||
mapInfoP->u.map_info_mmap.map_size == MAP_INFO_UNKNOWN) {
if ((memInfoP->regionVirtBase =
mmap((caddr_t) 0,
Size,
PROT_READ | PROT_WRITE,
MAP_SHARED,
xf86Info.consoleFd,
(unsigned long) mapInfoP->u.map_info_mmap.map_offset))
== (void *) -1) {
FatalError
("xf86MapInfoMap: Failed to map memory at 0x%x\n\t%s\n",
mapInfoP->u.map_info_mmap.map_offset, strerror(errno));
}
if (mapInfoP->u.map_info_mmap.internal_offset > 0)
memInfoP->regionVirtBase +=
mapInfoP->u.map_info_mmap.internal_offset;
}
break;
default:
FatalError("xf86MapInfoMap: Unsuported mapping method\n");
break;
}
return (void *) ((int) memInfoP->regionVirtBase + (int) Base);
}
static void
xf86MapInfoUnmap(struct memAccess *memInfoP, unsigned long Size)
{
struct map_info *mapInfoP = &(memInfoP->memInfo);
switch (mapInfoP->method) {
case MAP_MMAP:
if (memInfoP->regionVirtBase != NULL) {
if (mapInfoP->u.map_info_mmap.map_size != MAP_INFO_UNKNOWN)
Size = mapInfoP->u.map_info_mmap.map_size;
munmap((caddr_t) memInfoP->regionVirtBase, Size);
memInfoP->regionVirtBase = NULL;
}
break;
default:
FatalError("xf86MapInfoMap: Unsuported mapping method\n");
break;
}
}
static void *
armMapVidMem(int ScreenNum, unsigned long Base, unsigned long Size, int flags)
{
struct memAccess *memInfoP;
if ((memInfoP = checkMapInfo(FALSE, Region)) != NULL) {
/*
** xf86 passes in a physical address offset from the start
** of physical memory, but xf86MapInfoMap expects an
** offset from the start of the specified region - it gets
** the physical address of the region from the display driver.
*/
switch (Region) {
case LINEAR_REGION:
if (vgaPhysLinearBase) {
Base -= vgaPhysLinearBase;
}
break;
case VGA_REGION:
Base -= 0xA0000;
break;
}
base = xf86MapInfoMap(memInfoP, Base, Size);
return base;
}
return mapVidMem(ScreenNum, Base, Size, flags);
}
static void
armUnmapVidMem(int ScreenNum, void *Base, unsigned long Size)
{
struct memAccess *memInfoP;
if ((memInfoP = checkMapInfo(FALSE, Region)) != NULL) {
xf86MapInfoUnmap(memInfoP, Base, Size);
}
unmapVidMem(ScreenNum, Base, Size);
}
#ifdef USE_DEV_IO
static int IoFd = -1;
Bool
xf86EnableIO()
{
if (IoFd >= 0)
return TRUE;
if ((IoFd = open("/dev/io", O_RDWR)) == -1) {
xf86Msg(X_WARNING, "xf86EnableIO: "
"Failed to open /dev/io for extended I/O\n");
return FALSE;
}
return TRUE;
}
void
xf86DisableIO()
{
if (IoFd < 0)
return;
close(IoFd);
IoFd = -1;
return;
}
#endif
#if defined(USE_ARC_MMAP) || defined(__arm32__)
Bool
xf86EnableIO()
{
int fd;
void *base;
if (ExtendedEnabled)
return TRUE;
if ((fd = open("/dev/ttyC0", O_RDWR)) >= 0) {
/* Try to map a page at the pccons I/O space */
base = (void *) mmap((caddr_t) 0, 65536, PROT_READ | PROT_WRITE,
MAP_FLAGS, fd, (off_t) 0x0000);
if (base != (void *) -1) {
IOPortBase = base;
}
else {
xf86Msg(X_WARNING, "EnableIO: failed to mmap %s (%s)\n",
"/dev/ttyC0", strerror(errno));
return FALSE;
}
}
else {
xf86Msg("EnableIO: failed to open %s (%s)\n",
"/dev/ttyC0", strerror(errno));
return FALSE;
}
ExtendedEnabled = TRUE;
return TRUE;
}
void
xf86DisableIO()
{
return;
}
#endif /* USE_ARC_MMAP */
#if 0
/*
* XXX This is here for reference. It needs to be handled differently for the
* ND.
*/
#if defined(USE_ARC_MMAP) || defined(__arm32__)
#ifdef USE_ARM32_MMAP
#define DEV_MEM_IOBASE 0x43000000
#endif
static Bool ScreenEnabled[MAXSCREENS];
static Bool ExtendedEnabled = FALSE;
static Bool InitDone = FALSE;
Bool
xf86EnableIOPorts(ScreenNum)
int ScreenNum;
{
int i;
int fd;
void *base;
#ifdef __arm32__
struct memAccess *memInfoP;
int *Size;
#endif
ScreenEnabled[ScreenNum] = TRUE;
if (ExtendedEnabled)
return TRUE;
#ifdef USE_ARC_MMAP
if ((fd = open("/dev/ttyC0", O_RDWR)) >= 0) {
/* Try to map a page at the pccons I/O space */
base = (void *) mmap((caddr_t) 0, 65536, PROT_READ | PROT_WRITE,
MAP_FLAGS, fd, (off_t) 0x0000);
if (base != (void *) -1) {
IOPortBase = base;
}
else {
xf86Msg(X_ERROR,
"EnableIOPorts: failed to mmap %s (%s)\n",
"/dev/ttyC0", strerror(errno));
}
}
else {
xf86Msg(X_ERROR, "EnableIOPorts: failed to open %s (%s)\n",
"/dev/ttyC0", strerror(errno));
}
#endif
#ifdef __arm32__
IOPortBase = (unsigned int) -1;
if ((memInfoP = checkMapInfo(TRUE, MMIO_REGION)) != NULL) {
/*
* xf86MapInfoMap maps an offset from the start of video IO
* space (e.g. 0x3B0), but IOPortBase is expected to map to
* physical address 0x000, so subtract the start of video I/O
* space from the result. This is safe for now becase we
* actually mmap the start of the page, then the start of video
* I/O space is added as an internal offset.
*/
IOPortBase = (unsigned int) xf86MapInfoMap(memInfoP, (caddr_t) 0x0, 0L)
- memInfoP->memInfo.u.map_info_mmap.internal_offset;
ExtendedEnabled = TRUE;
return TRUE;
}
#ifdef USE_ARM32_MMAP
checkDevMem(TRUE);
if (devMemFd >= 0 && useDevMem) {
base = (void *) mmap((caddr_t) 0, 0x400, PROT_READ | PROT_WRITE,
MAP_FLAGS, devMemFd, (off_t) DEV_MEM_IOBASE);
if (base != (void *) -1)
IOPortBase = (unsigned int) base;
}
if (IOPortBase == (unsigned int) -1) {
xf86Msg(X_WARNING,
"xf86EnableIOPorts: failed to open mem device or map IO base. \n\
Make sure you have the Aperture Driver installed, or a kernel built with the INSECURE option\n");
return FALSE;
}
#else
/* We don't have the IOBASE, so we can't map the address */
xf86Msg(X_WARNING,
"xf86EnableIOPorts: failed to open mem device or map IO base. \n\
Try building the server with USE_ARM32_MMAP defined\n");
return FALSE;
#endif
#endif
ExtendedEnabled = TRUE;
return TRUE;
}
void
xf86DisableIOPorts(ScreenNum)
int ScreenNum;
{
int i;
#ifdef __arm32__
struct memAccess *memInfoP;
#endif
ScreenEnabled[ScreenNum] = FALSE;
#ifdef __arm32__
if ((memInfoP = checkMapInfo(FALSE, MMIO_REGION)) != NULL) {
xf86MapInfoUnmap(memInfoP, 0);
}
#endif
#ifdef USE_ARM32_MMAP
if (!ExtendedEnabled)
return;
for (i = 0; i < MAXSCREENS; i++)
if (ScreenEnabled[i])
return;
munmap((caddr_t) IOPortBase, 0x400);
IOPortBase = (unsigned int) -1;
ExtendedEnabled = FALSE;
#endif
return;
}
#endif /* USE_ARC_MMAP || USE_ARM32_MMAP */
#endif
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