Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/tc/tc.c b/drivers/tc/tc.c
new file mode 100644
index 0000000..a89ef4d
--- /dev/null
+++ b/drivers/tc/tc.c
@@ -0,0 +1,260 @@
+/*
+ * tc-init: We assume the TURBOchannel to be up and running so
+ * just probe for Modules and fill in the global data structure
+ * tc_bus.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (c) Harald Koerfgen, 1998
+ * Copyright (c) 2001, 2003 Maciej W. Rozycki
+ */
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include <asm/addrspace.h>
+#include <asm/errno.h>
+#include <asm/dec/machtype.h>
+#include <asm/dec/prom.h>
+#include <asm/dec/tcinfo.h>
+#include <asm/dec/tcmodule.h>
+#include <asm/dec/interrupts.h>
+#include <asm/paccess.h>
+#include <asm/ptrace.h>
+
+#define TC_DEBUG
+
+MODULE_LICENSE("GPL");
+slot_info tc_bus[MAX_SLOT];
+static int num_tcslots;
+static tcinfo *info;
+
+unsigned long system_base;
+
+/*
+ * Interface to the world. Read comment in include/asm-mips/tc.h.
+ */
+
+int search_tc_card(const char *name)
+{
+ int slot;
+ slot_info *sip;
+
+ for (slot = 0; slot < num_tcslots; slot++) {
+ sip = &tc_bus[slot];
+ if ((sip->flags & FREE) &&
+ (strncmp(sip->name, name, strlen(name)) == 0)) {
+ return slot;
+ }
+ }
+
+ return -ENODEV;
+}
+
+void claim_tc_card(int slot)
+{
+ if (tc_bus[slot].flags & IN_USE) {
+ printk("claim_tc_card: attempting to claim a card already in use\n");
+ return;
+ }
+ tc_bus[slot].flags &= ~FREE;
+ tc_bus[slot].flags |= IN_USE;
+}
+
+void release_tc_card(int slot)
+{
+ if (tc_bus[slot].flags & FREE) {
+ printk("release_tc_card: "
+ "attempting to release a card already free\n");
+ return;
+ }
+ tc_bus[slot].flags &= ~IN_USE;
+ tc_bus[slot].flags |= FREE;
+}
+
+unsigned long get_tc_base_addr(int slot)
+{
+ return tc_bus[slot].base_addr;
+}
+
+unsigned long get_tc_irq_nr(int slot)
+{
+ return tc_bus[slot].interrupt;
+}
+
+unsigned long get_tc_speed(void)
+{
+ return 100000 * (10000 / (unsigned long)info->clk_period);
+}
+
+/*
+ * Probing for TURBOchannel modules
+ */
+static void __init tc_probe(unsigned long startaddr, unsigned long size,
+ int slots)
+{
+ int i, slot, err;
+ long offset;
+ unsigned char pattern[4];
+ unsigned char *module;
+
+ for (slot = 0; slot < slots; slot++) {
+ module = (char *)(startaddr + slot * size);
+
+ offset = OLDCARD;
+
+ err = 0;
+ err |= get_dbe(pattern[0], module + OLDCARD + TC_PATTERN0);
+ err |= get_dbe(pattern[1], module + OLDCARD + TC_PATTERN1);
+ err |= get_dbe(pattern[2], module + OLDCARD + TC_PATTERN2);
+ err |= get_dbe(pattern[3], module + OLDCARD + TC_PATTERN3);
+ if (err)
+ continue;
+
+ if (pattern[0] != 0x55 || pattern[1] != 0x00 ||
+ pattern[2] != 0xaa || pattern[3] != 0xff) {
+ offset = NEWCARD;
+
+ err = 0;
+ err |= get_dbe(pattern[0], module + TC_PATTERN0);
+ err |= get_dbe(pattern[1], module + TC_PATTERN1);
+ err |= get_dbe(pattern[2], module + TC_PATTERN2);
+ err |= get_dbe(pattern[3], module + TC_PATTERN3);
+ if (err)
+ continue;
+ }
+
+ if (pattern[0] != 0x55 || pattern[1] != 0x00 ||
+ pattern[2] != 0xaa || pattern[3] != 0xff)
+ continue;
+
+ tc_bus[slot].base_addr = (unsigned long)module;
+ for(i = 0; i < 8; i++) {
+ tc_bus[slot].firmware[i] =
+ module[TC_FIRM_VER + offset + 4 * i];
+ tc_bus[slot].vendor[i] =
+ module[TC_VENDOR + offset + 4 * i];
+ tc_bus[slot].name[i] =
+ module[TC_MODULE + offset + 4 * i];
+ }
+ tc_bus[slot].firmware[8] = 0;
+ tc_bus[slot].vendor[8] = 0;
+ tc_bus[slot].name[8] = 0;
+ /*
+ * Looks unneccesary, but we may change
+ * TC? in the future
+ */
+ switch (slot) {
+ case 0:
+ tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC0];
+ break;
+ case 1:
+ tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC1];
+ break;
+ case 2:
+ tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC2];
+ break;
+ /*
+ * Yuck! DS5000/200 onboard devices
+ */
+ case 5:
+ tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC5];
+ break;
+ case 6:
+ tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC6];
+ break;
+ default:
+ tc_bus[slot].interrupt = -1;
+ break;
+ }
+ }
+}
+
+/*
+ * the main entry
+ */
+void __init tc_init(void)
+{
+ int tc_clock;
+ int i;
+ unsigned long slot0addr;
+ unsigned long slot_size;
+
+ if (!TURBOCHANNEL)
+ return;
+
+ for (i = 0; i < MAX_SLOT; i++) {
+ tc_bus[i].base_addr = 0;
+ tc_bus[i].name[0] = 0;
+ tc_bus[i].vendor[0] = 0;
+ tc_bus[i].firmware[0] = 0;
+ tc_bus[i].interrupt = -1;
+ tc_bus[i].flags = FREE;
+ }
+
+ info = (tcinfo *) rex_gettcinfo();
+ slot0addr = (unsigned long)KSEG1ADDR(rex_slot_address(0));
+
+ switch (mips_machtype) {
+ case MACH_DS5000_200:
+ num_tcslots = 7;
+ break;
+ case MACH_DS5000_1XX:
+ case MACH_DS5000_2X0:
+ case MACH_DS5900:
+ num_tcslots = 3;
+ break;
+ case MACH_DS5000_XX:
+ default:
+ num_tcslots = 2;
+ break;
+ }
+
+ tc_clock = 10000 / info->clk_period;
+
+ if (TURBOCHANNEL && info->slot_size && slot0addr) {
+ printk("TURBOchannel rev. %1d at %2d.%1d MHz ", info->revision,
+ tc_clock / 10, tc_clock % 10);
+ printk("(with%s parity)\n", info->parity ? "" : "out");
+
+ slot_size = info->slot_size << 20;
+
+ tc_probe(slot0addr, slot_size, num_tcslots);
+
+ /*
+ * All TURBOchannel DECstations have the onboard devices
+ * where the (num_tcslots + 0 or 1 on DS5k/xx) Option Module
+ * would be.
+ */
+ if(mips_machtype == MACH_DS5000_XX)
+ i = 1;
+ else
+ i = 0;
+
+ system_base = slot0addr + slot_size * (num_tcslots + i);
+
+#ifdef TC_DEBUG
+ for (i = 0; i < num_tcslots; i++)
+ if (tc_bus[i].base_addr) {
+ printk(" slot %d: ", i);
+ printk("%s %s %s\n", tc_bus[i].vendor,
+ tc_bus[i].name, tc_bus[i].firmware);
+ }
+#endif
+ ioport_resource.end = KSEG2 - 1;
+ }
+}
+
+subsys_initcall(tc_init);
+
+EXPORT_SYMBOL(search_tc_card);
+EXPORT_SYMBOL(claim_tc_card);
+EXPORT_SYMBOL(release_tc_card);
+EXPORT_SYMBOL(get_tc_base_addr);
+EXPORT_SYMBOL(get_tc_irq_nr);
+EXPORT_SYMBOL(get_tc_speed);
+EXPORT_SYMBOL(system_base);