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xenocara/xserver/hw/xfree86/common/xf86AutoConfig.c
kettenis 093965b9a6 Add code to choose a video driver based on the wscons(4) display type. Makes 
it possible to run X without a configuration file on (some) sparc64 machines
and perhaps other machines that use wscons(4) frame buffers.

ok matthieu@
2009-02-19 21:53:30 +00:00

509 lines
14 KiB
C
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/*
* Copyright 2003 by David H. Dawes.
* Copyright 2003 by X-Oz Technologies.
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name of the copyright holder(s)
* and author(s) shall not be used in advertising or otherwise to promote
* the sale, use or other dealings in this Software without prior written
* authorization from the copyright holder(s) and author(s).
*
* Author: David Dawes <dawes@XFree86.Org>.
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include "xf86.h"
#include "xf86Parser.h"
#include "xf86tokens.h"
#include "xf86Config.h"
#include "xf86Priv.h"
#include "xf86_OSlib.h"
#include "dirent.h"
/* Sections for the default built-in configuration. */
#define BUILTIN_DEVICE_NAME \
"\"Builtin Default %s Device %d\""
#define BUILTIN_DEVICE_SECTION_PRE \
"Section \"Device\"\n" \
"\tIdentifier\t" BUILTIN_DEVICE_NAME "\n" \
"\tDriver\t\"%s\"\n"
#define BUILTIN_DEVICE_SECTION_POST \
"EndSection\n\n"
#define BUILTIN_DEVICE_SECTION \
BUILTIN_DEVICE_SECTION_PRE \
BUILTIN_DEVICE_SECTION_POST
#define BUILTIN_SCREEN_NAME \
"\"Builtin Default %s Screen %d\""
#define BUILTIN_SCREEN_SECTION \
"Section \"Screen\"\n" \
"\tIdentifier\t" BUILTIN_SCREEN_NAME "\n" \
"\tDevice\t" BUILTIN_DEVICE_NAME "\n" \
"EndSection\n\n"
#define BUILTIN_LAYOUT_SECTION_PRE \
"Section \"ServerLayout\"\n" \
"\tIdentifier\t\"Builtin Default Layout\"\n"
#define BUILTIN_LAYOUT_SCREEN_LINE \
"\tScreen\t" BUILTIN_SCREEN_NAME "\n"
#define BUILTIN_LAYOUT_SECTION_POST \
"EndSection\n\n"
static const char **builtinConfig = NULL;
static int builtinLines = 0;
static const char *deviceList[] = {
"fbdev",
"vesa",
NULL
};
/*
* A built-in config file is stored as an array of strings, with each string
* representing a single line. AppendToConfig() breaks up the string "s"
* into lines, and appends those lines it to builtinConfig.
*/
static void
AppendToList(const char *s, const char ***list, int *lines)
{
char *str, *newstr, *p;
str = xnfstrdup(s);
for (p = strtok(str, "\n"); p; p = strtok(NULL, "\n")) {
(*lines)++;
*list = xnfrealloc(*list, (*lines + 1) * sizeof(**list));
newstr = xnfalloc(strlen(p) + 2);
strcpy(newstr, p);
strcat(newstr, "\n");
(*list)[*lines - 1] = newstr;
(*list)[*lines] = NULL;
}
xfree(str);
}
static void
FreeList(const char ***list, int *lines)
{
int i;
for (i = 0; i < *lines; i++) {
if ((*list)[i])
xfree((*list)[i]);
}
xfree(*list);
*list = NULL;
*lines = 0;
}
static void
FreeConfig(void)
{
FreeList(&builtinConfig, &builtinLines);
}
static void
AppendToConfig(const char *s)
{
AppendToList(s, &builtinConfig, &builtinLines);
}
static const char *
videoPtrToDriverName(struct pci_device *dev)
{
/*
* things not handled yet:
* cyrix/nsc. should be merged into geode anyway.
* xgi.
*/
switch (dev->vendor_id)
{
case 0x1022:
if (dev->device_id == 0x2081)
return "geode";
else
return NULL;
case 0x1142: return "apm";
case 0xedd8: return "ark";
case 0x1a03: return "ast";
case 0x1002: return "ati";
case 0x102c: return "chips";
case 0x1013: return "cirrus";
case 0x8086:
if ((dev->device_id == 0x00d1) || (dev->device_id == 0x7800))
return "i740";
else return "intel";
case 0x102b: return "mga";
case 0x10c8: return "neomagic";
case 0x105d: return "i128";
case 0x10de: case 0x12d2: return "nv";
case 0x1163: return "rendition";
case 0x5333:
switch (dev->device_id)
{
case 0x88d0: case 0x88d1: case 0x88f0: case 0x8811:
case 0x8812: case 0x8814: case 0x8901:
return "s3";
case 0x5631: case 0x883d: case 0x8a01: case 0x8a10:
case 0x8c01: case 0x8c03: case 0x8904: case 0x8a13:
return "s3virge";
default:
return "savage";
}
case 0x1039: return "sis";
case 0x126f: return "siliconmotion";
case 0x121a:
if (dev->device_id < 0x0003)
return "voodoo";
else
return "tdfx";
case 0x3d3d: return "glint";
case 0x1023: return "trident";
case 0x100c: return "tseng";
case 0x1106: return "openchrome";
case 0x15ad: return "vmware";
default: break;
}
return NULL;
}
Bool
xf86AutoConfig(void)
{
const char **p;
char buf[1024];
const char *driver = NULL;
ConfigStatus ret;
driver = chooseVideoDriver();
if (driver) {
snprintf(buf, sizeof(buf), BUILTIN_DEVICE_SECTION_PRE,
driver, 0, driver);
AppendToConfig(buf);
ErrorF("New driver is \"%s\"\n", driver);
buf[0] = '\t';
AppendToConfig(BUILTIN_DEVICE_SECTION_POST);
snprintf(buf, sizeof(buf), BUILTIN_SCREEN_SECTION,
driver, 0, driver, 0);
AppendToConfig(buf);
}
for (p = deviceList; *p; p++) {
snprintf(buf, sizeof(buf), BUILTIN_DEVICE_SECTION, *p, 0, *p);
AppendToConfig(buf);
snprintf(buf, sizeof(buf), BUILTIN_SCREEN_SECTION, *p, 0, *p, 0);
AppendToConfig(buf);
}
AppendToConfig(BUILTIN_LAYOUT_SECTION_PRE);
if (driver) {
snprintf(buf, sizeof(buf), BUILTIN_LAYOUT_SCREEN_LINE, driver, 0);
AppendToConfig(buf);
}
for (p = deviceList; *p; p++) {
snprintf(buf, sizeof(buf), BUILTIN_LAYOUT_SCREEN_LINE, *p, 0);
AppendToConfig(buf);
}
AppendToConfig(BUILTIN_LAYOUT_SECTION_POST);
xf86MsgVerb(X_DEFAULT, 0,
"Using default built-in configuration (%d lines)\n",
builtinLines);
xf86MsgVerb(X_DEFAULT, 3, "--- Start of built-in configuration ---\n");
for (p = builtinConfig; *p; p++)
xf86ErrorFVerb(3, "\t%s", *p);
xf86MsgVerb(X_DEFAULT, 3, "--- End of built-in configuration ---\n");
xf86setBuiltinConfig(builtinConfig);
ret = xf86HandleConfigFile(TRUE);
FreeConfig();
if (ret != CONFIG_OK)
xf86Msg(X_ERROR, "Error parsing the built-in default configuration.\n");
return (ret == CONFIG_OK);
}
int
xchomp(char *line)
{
size_t len = 0;
if (!line) {
return 1;
}
len = strlen(line);
if (line[len - 1] == '\n' && len > 0) {
line[len - 1] = '\0';
}
return 0;
}
GDevPtr
autoConfigDevice(GDevPtr preconf_device)
{
GDevPtr ptr = NULL;
if (!xf86configptr) {
return NULL;
}
/* If there's a configured section with no driver chosen, use it */
if (preconf_device) {
ptr = preconf_device;
} else {
ptr = (GDevPtr)xalloc(sizeof(GDevRec));
if (!ptr) {
return NULL;
}
memset((GDevPtr)ptr, 0, sizeof(GDevRec));
ptr->chipID = -1;
ptr->chipRev = -1;
ptr->irq = -1;
ptr->active = TRUE;
ptr->claimed = FALSE;
ptr->identifier = "Autoconfigured Video Device";
ptr->driver = NULL;
}
if (!ptr->driver) {
ptr->driver = chooseVideoDriver();
}
/* TODO Handle multiple screen sections */
if (xf86ConfigLayout.screens && !xf86ConfigLayout.screens->screen->device) {
xf86ConfigLayout.screens->screen->device = ptr;
ptr->myScreenSection = xf86ConfigLayout.screens->screen;
}
xf86Msg(X_DEFAULT, "Assigned the driver to the xf86ConfigLayout\n");
return ptr;
}
#ifdef __linux__
/* This function is used to provide a workaround for binary drivers that
* don't export their PCI ID's properly. If distros don't end up using this
* feature it can and should be removed because the symbol-based resolution
* scheme should be the primary one */
static void
matchDriverFromFiles (char** matches, uint16_t match_vendor, uint16_t match_chip)
{
DIR *idsdir;
FILE *fp;
struct dirent *direntry;
char *line = NULL;
size_t len;
ssize_t read;
char path_name[256], vendor_str[5], chip_str[5];
uint16_t vendor, chip;
int i, j;
idsdir = opendir(PCI_TXT_IDS_PATH);
if (!idsdir)
return;
xf86Msg(X_INFO, "Scanning %s directory for additional PCI ID's supported by the drivers\n", PCI_TXT_IDS_PATH);
direntry = readdir(idsdir);
/* Read the directory */
while (direntry) {
if (direntry->d_name[0] == '.') {
direntry = readdir(idsdir);
continue;
}
len = strlen(direntry->d_name);
/* A tiny bit of sanity checking. We should probably do better */
if (strncmp(&(direntry->d_name[len-4]), ".ids", 4) == 0) {
/* We need the full path name to open the file */
strncpy(path_name, PCI_TXT_IDS_PATH, 256);
strncat(path_name, "/", 1);
strncat(path_name, direntry->d_name, (256 - strlen(path_name) - 1));
fp = fopen(path_name, "r");
if (fp == NULL) {
xf86Msg(X_ERROR, "Could not open %s for reading. Exiting.\n", path_name);
goto end;
}
/* Read the file */
#ifdef __GLIBC__
while ((read = getline(&line, &len, fp)) != -1) {
#else
while ((line = fgetln(fp, &len)) != (char *)NULL) {
#endif /* __GLIBC __ */
xchomp(line);
if (isdigit(line[0])) {
strncpy(vendor_str, line, 4);
vendor_str[4] = '\0';
vendor = (int)strtol(vendor_str, NULL, 16);
if ((strlen(&line[4])) == 0) {
chip_str[0] = '\0';
chip = -1;
} else {
/* Handle trailing whitespace */
if (isspace(line[4])) {
chip_str[0] = '\0';
chip = -1;
} else {
/* Ok, it's a real ID */
strncpy(chip_str, &line[4], 4);
chip_str[4] = '\0';
chip = (int)strtol(chip_str, NULL, 16);
}
}
if (vendor == match_vendor && chip == match_chip ) {
i = 0;
while (matches[i]) {
i++;
}
matches[i] = (char*)xalloc(sizeof(char) * strlen(direntry->d_name) - 3);
if (!matches[i]) {
xf86Msg(X_ERROR, "Could not allocate space for the module name. Exiting.\n");
goto end;
}
/* hack off the .ids suffix. This should guard
* against other problems, but it will end up
* taking off anything after the first '.' */
for (j = 0; j < (strlen(direntry->d_name) - 3) ; j++) {
if (direntry->d_name[j] == '.') {
matches[i][j] = '\0';
break;
} else {
matches[i][j] = direntry->d_name[j];
}
}
xf86Msg(X_INFO, "Matched %s from file name %s\n", matches[i], direntry->d_name);
}
} else {
/* TODO Handle driver overrides here */
}
}
fclose(fp);
}
direntry = readdir(idsdir);
}
end:
xfree(line);
closedir(idsdir);
}
#endif /* __linux__ */
char*
chooseVideoDriver(void)
{
struct pci_device * info = NULL;
struct pci_device_iterator *iter;
char *chosen_driver = NULL;
int i;
char *matches[20]; /* If we have more than 20 drivers we're in trouble */
for (i=0 ; i<20 ; i++)
matches[i] = NULL;
/* Find the primary device, and get some information about it. */
iter = pci_slot_match_iterator_create(NULL);
while ((info = pci_device_next(iter)) != NULL) {
if (xf86IsPrimaryPci(info)) {
break;
}
}
pci_iterator_destroy(iter);
if (!info) {
ErrorF("Primary device is not PCI\n");
}
#ifdef __linux__
else {
matchDriverFromFiles(matches, info->vendor_id, info->device_id);
}
#endif /* __linux__ */
/* TODO Handle multiple drivers claiming to support the same PCI ID */
if (matches[0]) {
chosen_driver = matches[0];
} else {
if (info != NULL)
chosen_driver = videoPtrToDriverName(info);
#ifdef __OpenBSD__
if (chosen_driver == NULL) {
int fd = xf86Info.screenFd;
int type;
if (ioctl(fd, WSDISPLAYIO_GTYPE, &type) != -1) {
switch (type) {
case WSDISPLAY_TYPE_SUNFFB:
chosen_driver = "sunffb";
break;
#ifdef notyet
case WSDISPLAY_TYPE_SUNCG6:
chosen_driver = "suncg6";
break;
#endif
case WSDISPLAY_TYPE_IFB:
chosen_driver = "wildcatfb";
break;
default:
#if defined(__i386__) || defined(__amd64__)
chosen_driver = "vesa";
#else
chosen_driver = "wsfb";
#endif
break;
}
}
}
#endif
if (chosen_driver == NULL) {
#if defined __i386__ || defined __amd64__ || defined __x86_64__ || defined __hurd__
chosen_driver = "vesa";
#elif defined __sparc__
chosen_driver = "sunffb";
#else
chosen_driver = "fbdev";
#endif
}
}
xf86Msg(X_DEFAULT, "Matched %s for the autoconfigured driver\n", chosen_driver);
i = 0;
while (matches[i]) {
if (matches[i] != chosen_driver) {
xfree(matches[i]);
}
i++;
}
return chosen_driver;
}
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