Initial import

1 files changed, 202 insertions, 0 deletions

diff --git a/drivers/tc/tc.c b/drivers/tc/tc.c
new file mode 100644
index 000000000..3be951965
--- /dev/null
+++ b/drivers/tc/tc.c
@@ -0,0 +1,202 @@
+/*
+ *	TURBOchannel bus services.
+ *
+ *	Copyright (c) Harald Koerfgen, 1998
+ *	Copyright (c) 2001, 2003, 2005, 2006  Maciej W. Rozycki
+ *	Copyright (c) 2005  James Simmons
+ *
+ *	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.
+ */
+#include <linux/compiler.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/tc.h>
+#include <linux/types.h>
+
+#include <asm/io.h>
+
+static struct tc_bus tc_bus = {
+	.name = "TURBOchannel",
+};
+
+/*
+ * Probing for TURBOchannel modules.
+ */
+static void __init tc_bus_add_devices(struct tc_bus *tbus)
+{
+	resource_size_t slotsize = tbus->info.slot_size << 20;
+	resource_size_t extslotsize = tbus->ext_slot_size;
+	resource_size_t slotaddr;
+	resource_size_t extslotaddr;
+	resource_size_t devsize;
+	void __iomem *module;
+	struct tc_dev *tdev;
+	int i, slot, err;
+	u8 pattern[4];
+	long offset;
+
+	for (slot = 0; slot < tbus->num_tcslots; slot++) {
+		slotaddr = tbus->slot_base + slot * slotsize;
+		extslotaddr = tbus->ext_slot_base + slot * extslotsize;
+		module = ioremap_nocache(slotaddr, slotsize);
+		BUG_ON(!module);
+
+		offset = TC_OLDCARD;
+
+		err = 0;
+		err |= tc_preadb(pattern + 0, module + offset + TC_PATTERN0);
+		err |= tc_preadb(pattern + 1, module + offset + TC_PATTERN1);
+		err |= tc_preadb(pattern + 2, module + offset + TC_PATTERN2);
+		err |= tc_preadb(pattern + 3, module + offset + TC_PATTERN3);
+		if (err)
+			goto out_err;
+
+		if (pattern[0] != 0x55 || pattern[1] != 0x00 ||
+		    pattern[2] != 0xaa || pattern[3] != 0xff) {
+			offset = TC_NEWCARD;
+
+			err = 0;
+			err |= tc_preadb(pattern + 0,
+					 module + offset + TC_PATTERN0);
+			err |= tc_preadb(pattern + 1,
+					 module + offset + TC_PATTERN1);
+			err |= tc_preadb(pattern + 2,
+					 module + offset + TC_PATTERN2);
+			err |= tc_preadb(pattern + 3,
+					 module + offset + TC_PATTERN3);
+			if (err)
+				goto out_err;
+		}
+
+		if (pattern[0] != 0x55 || pattern[1] != 0x00 ||
+		    pattern[2] != 0xaa || pattern[3] != 0xff)
+			goto out_err;
+
+		/* Found a board, allocate it an entry in the list */
+		tdev = kzalloc(sizeof(*tdev), GFP_KERNEL);
+		if (!tdev) {
+			pr_err("tc%x: unable to allocate tc_dev\n", slot);
+			goto out_err;
+		}
+		dev_set_name(&tdev->dev, "tc%x", slot);
+		tdev->bus = tbus;
+		tdev->dev.parent = &tbus->dev;
+		tdev->dev.bus = &tc_bus_type;
+		tdev->slot = slot;
+
+		for (i = 0; i < 8; i++) {
+			tdev->firmware[i] =
+				readb(module + offset + TC_FIRM_VER + 4 * i);
+			tdev->vendor[i] =
+				readb(module + offset + TC_VENDOR + 4 * i);
+			tdev->name[i] =
+				readb(module + offset + TC_MODULE + 4 * i);
+		}
+		tdev->firmware[8] = 0;
+		tdev->vendor[8] = 0;
+		tdev->name[8] = 0;
+
+		pr_info("%s: %s %s %s\n", dev_name(&tdev->dev), tdev->vendor,
+			tdev->name, tdev->firmware);
+
+		devsize = readb(module + offset + TC_SLOT_SIZE);
+		devsize <<= 22;
+		if (devsize <= slotsize) {
+			tdev->resource.start = slotaddr;
+			tdev->resource.end = slotaddr + devsize - 1;
+		} else if (devsize <= extslotsize) {
+			tdev->resource.start = extslotaddr;
+			tdev->resource.end = extslotaddr + devsize - 1;
+		} else {
+			pr_err("%s: Cannot provide slot space "
+			       "(%ldMiB required, up to %ldMiB supported)\n",
+			       dev_name(&tdev->dev), (long)(devsize >> 20),
+			       (long)(max(slotsize, extslotsize) >> 20));
+			kfree(tdev);
+			goto out_err;
+		}
+		tdev->resource.name = tdev->name;
+		tdev->resource.flags = IORESOURCE_MEM;
+
+		tc_device_get_irq(tdev);
+
+		if (device_register(&tdev->dev)) {
+			put_device(&tdev->dev);
+			goto out_err;
+		}
+		list_add_tail(&tdev->node, &tbus->devices);
+
+out_err:
+		iounmap(module);
+	}
+}
+
+/*
+ * The main entry.
+ */
+static int __init tc_init(void)
+{
+	/* Initialize the TURBOchannel bus */
+	if (tc_bus_get_info(&tc_bus))
+		goto out_err;
+
+	INIT_LIST_HEAD(&tc_bus.devices);
+	dev_set_name(&tc_bus.dev, "tc");
+	if (device_register(&tc_bus.dev))
+		goto out_err_device;
+
+	if (tc_bus.info.slot_size) {
+		unsigned int tc_clock = tc_get_speed(&tc_bus) / 100000;
+
+		pr_info("tc: TURBOchannel rev. %d at %d.%d MHz "
+			"(with%s parity)\n", tc_bus.info.revision,
+			tc_clock / 10, tc_clock % 10,
+			tc_bus.info.parity ? "" : "out");
+
+		tc_bus.resource[0].start = tc_bus.slot_base;
+		tc_bus.resource[0].end = tc_bus.slot_base +
+					 (tc_bus.info.slot_size << 20) *
+					 tc_bus.num_tcslots - 1;
+		tc_bus.resource[0].name = tc_bus.name;
+		tc_bus.resource[0].flags = IORESOURCE_MEM;
+		if (request_resource(&iomem_resource,
+				     &tc_bus.resource[0]) < 0) {
+			pr_err("tc: Cannot reserve resource\n");
+			goto out_err_device;
+		}
+		if (tc_bus.ext_slot_size) {
+			tc_bus.resource[1].start = tc_bus.ext_slot_base;
+			tc_bus.resource[1].end = tc_bus.ext_slot_base +
+						 tc_bus.ext_slot_size *
+						 tc_bus.num_tcslots - 1;
+			tc_bus.resource[1].name = tc_bus.name;
+			tc_bus.resource[1].flags = IORESOURCE_MEM;
+			if (request_resource(&iomem_resource,
+					     &tc_bus.resource[1]) < 0) {
+				pr_err("tc: Cannot reserve resource\n");
+				goto out_err_resource;
+			}
+		}
+
+		tc_bus_add_devices(&tc_bus);
+	}
+
+	return 0;
+
+out_err_resource:
+	release_resource(&tc_bus.resource[0]);
+out_err_device:
+	put_device(&tc_bus.dev);
+out_err:
+	return 0;
+}
+
+subsys_initcall(tc_init);