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path: root/drivers/video/offb.c
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Diffstat (limited to 'drivers/video/offb.c')
-rw-r--r--drivers/video/offb.c307
1 files changed, 161 insertions, 146 deletions
diff --git a/drivers/video/offb.c b/drivers/video/offb.c
index 71ce1fa45cf..faba6722852 100644
--- a/drivers/video/offb.c
+++ b/drivers/video/offb.c
@@ -63,8 +63,6 @@ struct offb_par default_par;
* Interface used by the world
*/
-int offb_init(void);
-
static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info);
static int offb_blank(int blank, struct fb_info *info);
@@ -73,11 +71,6 @@ static int offb_blank(int blank, struct fb_info *info);
extern boot_infos_t *boot_infos;
#endif
-static void offb_init_nodriver(struct device_node *);
-static void offb_init_fb(const char *name, const char *full_name,
- int width, int height, int depth, int pitch,
- unsigned long address, struct device_node *dp);
-
static struct fb_ops offb_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = offb_setcolreg,
@@ -230,123 +223,17 @@ static int offb_blank(int blank, struct fb_info *info)
return 0;
}
- /*
- * Initialisation
- */
-int __init offb_init(void)
+static void __iomem *offb_map_reg(struct device_node *np, int index,
+ unsigned long offset, unsigned long size)
{
- struct device_node *dp = NULL, *boot_disp = NULL;
-
- if (fb_get_options("offb", NULL))
- return -ENODEV;
+ struct resource r;
- for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
- if (get_property(dp, "linux,opened", NULL) &&
- get_property(dp, "linux,boot-display", NULL)) {
- boot_disp = dp;
- offb_init_nodriver(dp);
- }
- }
- for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
- if (get_property(dp, "linux,opened", NULL) &&
- dp != boot_disp)
- offb_init_nodriver(dp);
- }
-
- return 0;
-}
-
-
-static void __init offb_init_nodriver(struct device_node *dp)
-{
- unsigned int len;
- int i, width = 640, height = 480, depth = 8, pitch = 640;
- unsigned int flags, rsize, addr_prop = 0;
- unsigned long max_size = 0;
- u64 rstart, address = OF_BAD_ADDR;
- u32 *pp, *addrp, *up;
- u64 asize;
-
- pp = (u32 *)get_property(dp, "linux,bootx-depth", &len);
- if (pp == NULL)
- pp = (u32 *)get_property(dp, "depth", &len);
- if (pp && len == sizeof(u32))
- depth = *pp;
-
- pp = (u32 *)get_property(dp, "linux,bootx-width", &len);
- if (pp == NULL)
- pp = (u32 *)get_property(dp, "width", &len);
- if (pp && len == sizeof(u32))
- width = *pp;
-
- pp = (u32 *)get_property(dp, "linux,bootx-height", &len);
- if (pp == NULL)
- pp = (u32 *)get_property(dp, "height", &len);
- if (pp && len == sizeof(u32))
- height = *pp;
-
- pp = (u32 *)get_property(dp, "linux,bootx-linebytes", &len);
- if (pp == NULL)
- pp = (u32 *)get_property(dp, "linebytes", &len);
- if (pp && len == sizeof(u32))
- pitch = *pp;
- else
- pitch = width * ((depth + 7) / 8);
-
- rsize = (unsigned long)pitch * (unsigned long)height;
-
- /* Ok, now we try to figure out the address of the framebuffer.
- *
- * Unfortunately, Open Firmware doesn't provide a standard way to do
- * so. All we can do is a dodgy heuristic that happens to work in
- * practice. On most machines, the "address" property contains what
- * we need, though not on Matrox cards found in IBM machines. What I've
- * found that appears to give good results is to go through the PCI
- * ranges and pick one that is both big enough and if possible encloses
- * the "address" property. If none match, we pick the biggest
- */
- up = (u32 *)get_property(dp, "linux,bootx-addr", &len);
- if (up == NULL)
- up = (u32 *)get_property(dp, "address", &len);
- if (up && len == sizeof(u32))
- addr_prop = *up;
-
- for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags))
- != NULL; i++) {
- int match_addrp = 0;
-
- if (!(flags & IORESOURCE_MEM))
- continue;
- if (asize < rsize)
- continue;
- rstart = of_translate_address(dp, addrp);
- if (rstart == OF_BAD_ADDR)
- continue;
- if (addr_prop && (rstart <= addr_prop) &&
- ((rstart + asize) >= (addr_prop + rsize)))
- match_addrp = 1;
- if (match_addrp) {
- address = addr_prop;
- break;
- }
- if (rsize > max_size) {
- max_size = rsize;
- address = OF_BAD_ADDR;
- }
-
- if (address == OF_BAD_ADDR)
- address = rstart;
- }
- if (address == OF_BAD_ADDR && addr_prop)
- address = (u64)addr_prop;
- if (address != OF_BAD_ADDR) {
- /* kludge for valkyrie */
- if (strcmp(dp->name, "valkyrie") == 0)
- address += 0x1000;
- offb_init_fb(dp->name, dp->full_name, width, height, depth,
- pitch, address, dp);
- }
+ if (of_address_to_resource(np, index, &r))
+ return 0;
+ if ((r.start + offset + size) > r.end)
+ return 0;
+ return ioremap(r.start + offset, size);
}
static void __init offb_init_fb(const char *name, const char *full_name,
@@ -403,45 +290,39 @@ static void __init offb_init_fb(const char *name, const char *full_name,
par->cmap_type = cmap_unknown;
if (depth == 8) {
-
/* Palette hacks disabled for now */
-#if 0
if (dp && !strncmp(name, "ATY,Rage128", 11)) {
- unsigned long regbase = dp->addrs[2].address;
- par->cmap_adr = ioremap(regbase, 0x1FFF);
- par->cmap_type = cmap_r128;
+ par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
+ if (par->cmap_adr)
+ par->cmap_type = cmap_r128;
} else if (dp && (!strncmp(name, "ATY,RageM3pA", 12)
|| !strncmp(name, "ATY,RageM3p12A", 14))) {
- unsigned long regbase =
- dp->parent->addrs[2].address;
- par->cmap_adr = ioremap(regbase, 0x1FFF);
- par->cmap_type = cmap_M3A;
+ par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
+ if (par->cmap_adr)
+ par->cmap_type = cmap_M3A;
} else if (dp && !strncmp(name, "ATY,RageM3pB", 12)) {
- unsigned long regbase =
- dp->parent->addrs[2].address;
- par->cmap_adr = ioremap(regbase, 0x1FFF);
- par->cmap_type = cmap_M3B;
+ par->cmap_adr = offb_map_reg(dp, 2, 0, 0x1fff);
+ if (par->cmap_adr)
+ par->cmap_type = cmap_M3B;
} else if (dp && !strncmp(name, "ATY,Rage6", 9)) {
- unsigned long regbase = dp->addrs[1].address;
- par->cmap_adr = ioremap(regbase, 0x1FFF);
- par->cmap_type = cmap_radeon;
+ par->cmap_adr = offb_map_reg(dp, 1, 0, 0x1fff);
+ if (par->cmap_adr)
+ par->cmap_type = cmap_radeon;
} else if (!strncmp(name, "ATY,", 4)) {
unsigned long base = address & 0xff000000UL;
par->cmap_adr =
ioremap(base + 0x7ff000, 0x1000) + 0xcc0;
par->cmap_data = par->cmap_adr + 1;
par->cmap_type = cmap_m64;
- } else if (device_is_compatible(dp, "pci1014,b7")) {
- unsigned long regbase = dp->addrs[0].address;
- par->cmap_adr = ioremap(regbase + 0x6000, 0x1000);
- par->cmap_type = cmap_gxt2000;
+ } else if (dp && device_is_compatible(dp, "pci1014,b7")) {
+ par->cmap_adr = offb_map_reg(dp, 0, 0x6000, 0x1000);
+ if (par->cmap_adr)
+ par->cmap_type = cmap_gxt2000;
}
-#endif
- fix->visual = par->cmap_adr ? FB_VISUAL_PSEUDOCOLOR
- : FB_VISUAL_STATIC_PSEUDOCOLOR;
+ fix->visual = (par->cmap_type != cmap_unknown) ?
+ FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_STATIC_PSEUDOCOLOR;
} else
- fix->visual = /* par->cmap_adr ? FB_VISUAL_DIRECTCOLOR
- : */ FB_VISUAL_TRUECOLOR;
+ fix->visual = FB_VISUAL_TRUECOLOR;
var->xoffset = var->yoffset = 0;
switch (depth) {
@@ -521,5 +402,139 @@ static void __init offb_init_fb(const char *name, const char *full_name,
info->node, full_name);
}
+
+static void __init offb_init_nodriver(struct device_node *dp, int no_real_node)
+{
+ unsigned int len;
+ int i, width = 640, height = 480, depth = 8, pitch = 640;
+ unsigned int flags, rsize, addr_prop = 0;
+ unsigned long max_size = 0;
+ u64 rstart, address = OF_BAD_ADDR;
+ u32 *pp, *addrp, *up;
+ u64 asize;
+
+ pp = (u32 *)get_property(dp, "linux,bootx-depth", &len);
+ if (pp == NULL)
+ pp = (u32 *)get_property(dp, "depth", &len);
+ if (pp && len == sizeof(u32))
+ depth = *pp;
+
+ pp = (u32 *)get_property(dp, "linux,bootx-width", &len);
+ if (pp == NULL)
+ pp = (u32 *)get_property(dp, "width", &len);
+ if (pp && len == sizeof(u32))
+ width = *pp;
+
+ pp = (u32 *)get_property(dp, "linux,bootx-height", &len);
+ if (pp == NULL)
+ pp = (u32 *)get_property(dp, "height", &len);
+ if (pp && len == sizeof(u32))
+ height = *pp;
+
+ pp = (u32 *)get_property(dp, "linux,bootx-linebytes", &len);
+ if (pp == NULL)
+ pp = (u32 *)get_property(dp, "linebytes", &len);
+ if (pp && len == sizeof(u32))
+ pitch = *pp;
+ else
+ pitch = width * ((depth + 7) / 8);
+
+ rsize = (unsigned long)pitch * (unsigned long)height;
+
+ /* Ok, now we try to figure out the address of the framebuffer.
+ *
+ * Unfortunately, Open Firmware doesn't provide a standard way to do
+ * so. All we can do is a dodgy heuristic that happens to work in
+ * practice. On most machines, the "address" property contains what
+ * we need, though not on Matrox cards found in IBM machines. What I've
+ * found that appears to give good results is to go through the PCI
+ * ranges and pick one that is both big enough and if possible encloses
+ * the "address" property. If none match, we pick the biggest
+ */
+ up = (u32 *)get_property(dp, "linux,bootx-addr", &len);
+ if (up == NULL)
+ up = (u32 *)get_property(dp, "address", &len);
+ if (up && len == sizeof(u32))
+ addr_prop = *up;
+
+ /* Hack for when BootX is passing us */
+ if (no_real_node)
+ goto skip_addr;
+
+ for (i = 0; (addrp = of_get_address(dp, i, &asize, &flags))
+ != NULL; i++) {
+ int match_addrp = 0;
+
+ if (!(flags & IORESOURCE_MEM))
+ continue;
+ if (asize < rsize)
+ continue;
+ rstart = of_translate_address(dp, addrp);
+ if (rstart == OF_BAD_ADDR)
+ continue;
+ if (addr_prop && (rstart <= addr_prop) &&
+ ((rstart + asize) >= (addr_prop + rsize)))
+ match_addrp = 1;
+ if (match_addrp) {
+ address = addr_prop;
+ break;
+ }
+ if (rsize > max_size) {
+ max_size = rsize;
+ address = OF_BAD_ADDR;
+ }
+
+ if (address == OF_BAD_ADDR)
+ address = rstart;
+ }
+ skip_addr:
+ if (address == OF_BAD_ADDR && addr_prop)
+ address = (u64)addr_prop;
+ if (address != OF_BAD_ADDR) {
+ /* kludge for valkyrie */
+ if (strcmp(dp->name, "valkyrie") == 0)
+ address += 0x1000;
+ offb_init_fb(no_real_node ? "bootx" : dp->name,
+ no_real_node ? "display" : dp->full_name,
+ width, height, depth, pitch, address,
+ no_real_node ? dp : NULL);
+ }
+}
+
+static int __init offb_init(void)
+{
+ struct device_node *dp = NULL, *boot_disp = NULL;
+
+ if (fb_get_options("offb", NULL))
+ return -ENODEV;
+
+ /* Check if we have a MacOS display without a node spec */
+ if (get_property(of_chosen, "linux,bootx-noscreen", NULL) != NULL) {
+ /* The old code tried to work out which node was the MacOS
+ * display based on the address. I'm dropping that since the
+ * lack of a node spec only happens with old BootX versions
+ * (users can update) and with this code, they'll still get
+ * a display (just not the palette hacks).
+ */
+ offb_init_nodriver(of_chosen, 1);
+ }
+
+ for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
+ if (get_property(dp, "linux,opened", NULL) &&
+ get_property(dp, "linux,boot-display", NULL)) {
+ boot_disp = dp;
+ offb_init_nodriver(dp, 0);
+ }
+ }
+ for (dp = NULL; (dp = of_find_node_by_type(dp, "display"));) {
+ if (get_property(dp, "linux,opened", NULL) &&
+ dp != boot_disp)
+ offb_init_nodriver(dp, 0);
+ }
+
+ return 0;
+}
+
+
module_init(offb_init);
MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-30 13:01:42 +0000