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!

1 files changed, 260 insertions, 0 deletions

diff --git a/drivers/tc/tc.c b/drivers/tc/tc.c
new file mode 100644
index 00000000000..a89ef4df80c
--- /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);