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Diffstat (limited to 'drivers/nubus/nubus.c')
-rw-r--r--drivers/nubus/nubus.c125
1 files changed, 11 insertions, 114 deletions
diff --git a/drivers/nubus/nubus.c b/drivers/nubus/nubus.c
index 77a48a5164ff..df431e8a0631 100644
--- a/drivers/nubus/nubus.c
+++ b/drivers/nubus/nubus.c
@@ -13,7 +13,6 @@
#include <linux/nubus.h>
#include <linux/errno.h>
#include <linux/init.h>
-#include <linux/delay.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <asm/setup.h>
@@ -34,14 +33,6 @@ extern void oss_nubus_init(void);
#define NUBUS_TEST_PATTERN 0x5A932BC7
-/* Define this if you like to live dangerously - it is known not to
- work on pretty much every machine except the Quadra 630 and the LC
- III. */
-#undef I_WANT_TO_PROBE_SLOT_ZERO
-
-/* This sometimes helps combat failure to boot */
-#undef TRY_TO_DODGE_WSOD
-
/* Globals */
struct nubus_dev *nubus_devices;
@@ -101,9 +92,6 @@ static void nubus_rewind(unsigned char **ptr, int len, int map)
{
unsigned char *p = *ptr;
- /* Sanity check */
- if (len > 65536)
- pr_err("rewind of 0x%08x!\n", len);
while (len) {
do {
p--;
@@ -117,8 +105,6 @@ static void nubus_advance(unsigned char **ptr, int len, int map)
{
unsigned char *p = *ptr;
- if (len > 65536)
- pr_err("advance of 0x%08x!\n", len);
while (len) {
while (not_useful(p, map))
p++;
@@ -130,10 +116,15 @@ static void nubus_advance(unsigned char **ptr, int len, int map)
static void nubus_move(unsigned char **ptr, int len, int map)
{
+ unsigned long slot_space = (unsigned long)*ptr & 0xFF000000;
+
if (len > 0)
nubus_advance(ptr, len, map);
else if (len < 0)
nubus_rewind(ptr, -len, map);
+
+ if (((unsigned long)*ptr & 0xFF000000) != slot_space)
+ pr_err("%s: moved out of slot address space!\n", __func__);
}
/* Now, functions to read the sResource tree */
@@ -454,10 +445,6 @@ nubus_get_functional_resource(struct nubus_board *board, int slot,
pr_info(" Function 0x%02x:\n", parent->type);
nubus_get_subdir(parent, &dir);
- /* Apple seems to have botched the ROM on the IIx */
- if (slot == 0 && (unsigned long)dir.base % 2)
- dir.base += 1;
-
pr_debug("%s: parent is 0x%p, dir is 0x%p\n",
__func__, parent->base, dir.base);
@@ -691,83 +678,6 @@ static int __init nubus_get_board_resource(struct nubus_board *board, int slot,
return 0;
}
-/* Attempt to bypass the somewhat non-obvious arrangement of
- sResources in the motherboard ROM */
-static void __init nubus_find_rom_dir(struct nubus_board* board)
-{
- unsigned char *rp;
- unsigned char *romdir;
- struct nubus_dir dir;
- struct nubus_dirent ent;
-
- /* Check for the extra directory just under the format block */
- rp = board->fblock;
- nubus_rewind(&rp, 4, board->lanes);
- if (nubus_get_rom(&rp, 4, board->lanes) != NUBUS_TEST_PATTERN) {
- /* OK, the ROM was telling the truth */
- board->directory = board->fblock;
- nubus_move(&board->directory,
- nubus_expand32(board->doffset),
- board->lanes);
- return;
- }
-
- /* On "slot zero", you have to walk down a few more
- directories to get to the equivalent of a real card's root
- directory. We don't know what they were smoking when they
- came up with this. */
- romdir = nubus_rom_addr(board->slot);
- nubus_rewind(&romdir, ROM_DIR_OFFSET, board->lanes);
- dir.base = dir.ptr = romdir;
- dir.done = 0;
- dir.mask = board->lanes;
-
- /* This one points to an "Unknown Macintosh" directory */
- if (nubus_readdir(&dir, &ent) == -1)
- goto badrom;
-
- if (console_loglevel >= CONSOLE_LOGLEVEL_DEBUG)
- printk(KERN_INFO "nubus_get_rom_dir: entry %02x %06x\n", ent.type, ent.data);
- /* This one takes us to where we want to go. */
- if (nubus_readdir(&dir, &ent) == -1)
- goto badrom;
- if (console_loglevel >= CONSOLE_LOGLEVEL_DEBUG)
- printk(KERN_DEBUG "nubus_get_rom_dir: entry %02x %06x\n", ent.type, ent.data);
- nubus_get_subdir(&ent, &dir);
-
- /* Resource ID 01, also an "Unknown Macintosh" */
- if (nubus_readdir(&dir, &ent) == -1)
- goto badrom;
- if (console_loglevel >= CONSOLE_LOGLEVEL_DEBUG)
- printk(KERN_DEBUG "nubus_get_rom_dir: entry %02x %06x\n", ent.type, ent.data);
-
- /* FIXME: the first one is *not* always the right one. We
- suspect this has something to do with the ROM revision.
- "The HORROR ROM" (LC-series) uses 0x7e, while "The HORROR
- Continues" (Q630) uses 0x7b. The DAFB Macs evidently use
- something else. Please run "Slots" on your Mac (see
- include/linux/nubus.h for where to get this program) and
- tell us where the 'SiDirPtr' for Slot 0 is. If you feel
- brave, you should also use MacsBug to walk down the ROM
- directories like this function does and try to find the
- path to that address... */
- if (nubus_readdir(&dir, &ent) == -1)
- goto badrom;
- if (console_loglevel >= CONSOLE_LOGLEVEL_DEBUG)
- printk(KERN_DEBUG "nubus_get_rom_dir: entry %02x %06x\n", ent.type, ent.data);
-
- /* Bwahahahaha... */
- nubus_get_subdir(&ent, &dir);
- board->directory = dir.base;
- return;
-
- /* Even more evil laughter... */
- badrom:
- board->directory = board->fblock;
- nubus_move(&board->directory, nubus_expand32(board->doffset), board->lanes);
- printk(KERN_ERR "nubus_get_rom_dir: ROM weirdness! Notify the developers...\n");
-}
-
/* Add a board (might be many devices) to the list */
static struct nubus_board * __init nubus_add_board(int slot, int bytelanes)
{
@@ -828,8 +738,11 @@ static struct nubus_board * __init nubus_add_board(int slot, int bytelanes)
* since the initial Macintosh ROM releases skipped the check.
*/
- /* Attempt to work around slot zero weirdness */
- nubus_find_rom_dir(board);
+ /* Set up the directory pointer */
+ board->directory = board->fblock;
+ nubus_move(&board->directory, nubus_expand32(board->doffset),
+ board->lanes);
+
nubus_get_root_dir(board, &dir);
/* We're ready to rock */
@@ -849,9 +762,6 @@ static struct nubus_board * __init nubus_add_board(int slot, int bytelanes)
nubus_get_board_resource(board, slot, &ent);
}
- /* Aaaarrrrgghh! The LC III motherboard has *two* board
- resources. I have no idea WTF to do about this. */
-
while (nubus_readdir(&dir, &ent) != -1) {
struct nubus_dev *dev;
struct nubus_dev **devp;
@@ -898,8 +808,6 @@ void __init nubus_probe_slot(int slot)
continue;
dp = *rp;
- if(dp == 0)
- continue;
/* The last byte of the format block consists of two
nybbles which are "mirror images" of each other.
@@ -908,7 +816,7 @@ void __init nubus_probe_slot(int slot)
continue;
/* Check that this value is actually *on* one of the
bytelanes it claims are valid! */
- if ((dp & 0x0F) >= (1 << i))
+ if (not_useful(rp, dp))
continue;
/* Looks promising. Let's put it on the list. */
@@ -922,10 +830,6 @@ void __init nubus_scan_bus(void)
{
int slot;
- /* This might not work on your machine */
-#ifdef I_WANT_TO_PROBE_SLOT_ZERO
- nubus_probe_slot(0);
-#endif
for (slot = 9; slot < 15; slot++) {
nubus_probe_slot(slot);
}
@@ -943,13 +847,6 @@ static int __init nubus_init(void)
via_nubus_init();
}
-#ifdef TRY_TO_DODGE_WSOD
- /* Rogue Ethernet interrupts can kill the machine if we don't
- do this. Obviously this is bogus. Hopefully the local VIA
- gurus can fix the real cause of the problem. */
- mdelay(1000);
-#endif
-
/* And probe */
pr_info("NuBus: Scanning NuBus slots.\n");
nubus_devices = NULL;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 15:00:22 +0100