aboutsummaryrefslogtreecommitdiff
path: root/drivers/zorro/zorro.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/zorro/zorro.c
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
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!
Diffstat (limited to 'drivers/zorro/zorro.c')
-rw-r--r--drivers/zorro/zorro.c193
1 files changed, 193 insertions, 0 deletions
diff --git a/drivers/zorro/zorro.c b/drivers/zorro/zorro.c
new file mode 100644
index 000000000000..d3c05dfe20d2
--- /dev/null
+++ b/drivers/zorro/zorro.c
@@ -0,0 +1,193 @@
+/*
+ * $Id: zorro.c,v 1.1.2.1 1998/06/07 23:21:02 geert Exp $
+ *
+ * Zorro Bus Services
+ *
+ * Copyright (C) 1995-2003 Geert Uytterhoeven
+ *
+ * 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/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/zorro.h>
+#include <linux/bitops.h>
+#include <asm/setup.h>
+#include <asm/amigahw.h>
+
+#include "zorro.h"
+
+
+ /*
+ * Zorro Expansion Devices
+ */
+
+u_int zorro_num_autocon = 0;
+struct zorro_dev zorro_autocon[ZORRO_NUM_AUTO];
+
+
+ /*
+ * Single Zorro bus
+ */
+
+struct zorro_bus zorro_bus = {\
+ .resources = {
+ /* Zorro II regions (on Zorro II/III) */
+ { .name = "Zorro II exp", .start = 0x00e80000, .end = 0x00efffff },
+ { .name = "Zorro II mem", .start = 0x00200000, .end = 0x009fffff },
+ /* Zorro III regions (on Zorro III only) */
+ { .name = "Zorro III exp", .start = 0xff000000, .end = 0xffffffff },
+ { .name = "Zorro III cfg", .start = 0x40000000, .end = 0x7fffffff }
+ },
+ .name = "Zorro bus"
+};
+
+
+ /*
+ * Find Zorro Devices
+ */
+
+struct zorro_dev *zorro_find_device(zorro_id id, struct zorro_dev *from)
+{
+ struct zorro_dev *z;
+
+ if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(ZORRO))
+ return NULL;
+
+ for (z = from ? from+1 : &zorro_autocon[0];
+ z < zorro_autocon+zorro_num_autocon;
+ z++)
+ if (id == ZORRO_WILDCARD || id == z->id)
+ return z;
+ return NULL;
+}
+
+
+ /*
+ * Bitmask indicating portions of available Zorro II RAM that are unused
+ * by the system. Every bit represents a 64K chunk, for a maximum of 8MB
+ * (128 chunks, physical 0x00200000-0x009fffff).
+ *
+ * If you want to use (= allocate) portions of this RAM, you should clear
+ * the corresponding bits.
+ *
+ * Possible uses:
+ * - z2ram device
+ * - SCSI DMA bounce buffers
+ *
+ * FIXME: use the normal resource management
+ */
+
+DECLARE_BITMAP(zorro_unused_z2ram, 128);
+
+
+static void __init mark_region(unsigned long start, unsigned long end,
+ int flag)
+{
+ if (flag)
+ start += Z2RAM_CHUNKMASK;
+ else
+ end += Z2RAM_CHUNKMASK;
+ start &= ~Z2RAM_CHUNKMASK;
+ end &= ~Z2RAM_CHUNKMASK;
+
+ if (end <= Z2RAM_START || start >= Z2RAM_END)
+ return;
+ start = start < Z2RAM_START ? 0x00000000 : start-Z2RAM_START;
+ end = end > Z2RAM_END ? Z2RAM_SIZE : end-Z2RAM_START;
+ while (start < end) {
+ u32 chunk = start>>Z2RAM_CHUNKSHIFT;
+ if (flag)
+ set_bit(chunk, zorro_unused_z2ram);
+ else
+ clear_bit(chunk, zorro_unused_z2ram);
+ start += Z2RAM_CHUNKSIZE;
+ }
+}
+
+
+static struct resource __init *zorro_find_parent_resource(struct zorro_dev *z)
+{
+ int i;
+
+ for (i = 0; i < zorro_bus.num_resources; i++)
+ if (zorro_resource_start(z) >= zorro_bus.resources[i].start &&
+ zorro_resource_end(z) <= zorro_bus.resources[i].end)
+ return &zorro_bus.resources[i];
+ return &iomem_resource;
+}
+
+
+ /*
+ * Initialization
+ */
+
+static int __init zorro_init(void)
+{
+ struct zorro_dev *z;
+ unsigned int i;
+
+ if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(ZORRO))
+ return 0;
+
+ pr_info("Zorro: Probing AutoConfig expansion devices: %d device%s\n",
+ zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s");
+
+ /* Initialize the Zorro bus */
+ INIT_LIST_HEAD(&zorro_bus.devices);
+ strcpy(zorro_bus.dev.bus_id, "zorro");
+ device_register(&zorro_bus.dev);
+
+ /* Request the resources */
+ zorro_bus.num_resources = AMIGAHW_PRESENT(ZORRO3) ? 4 : 2;
+ for (i = 0; i < zorro_bus.num_resources; i++)
+ request_resource(&iomem_resource, &zorro_bus.resources[i]);
+
+ /* Register all devices */
+ for (i = 0; i < zorro_num_autocon; i++) {
+ z = &zorro_autocon[i];
+ z->id = (z->rom.er_Manufacturer<<16) | (z->rom.er_Product<<8);
+ if (z->id == ZORRO_PROD_GVP_EPC_BASE) {
+ /* GVP quirk */
+ unsigned long magic = zorro_resource_start(z)+0x8000;
+ z->id |= *(u16 *)ZTWO_VADDR(magic) & GVP_PRODMASK;
+ }
+ sprintf(z->name, "Zorro device %08x", z->id);
+ zorro_name_device(z);
+ z->resource.name = z->name;
+ if (request_resource(zorro_find_parent_resource(z), &z->resource))
+ printk(KERN_ERR "Zorro: Address space collision on device %s "
+ "[%lx:%lx]\n",
+ z->name, zorro_resource_start(z), zorro_resource_end(z));
+ sprintf(z->dev.bus_id, "%02x", i);
+ z->dev.parent = &zorro_bus.dev;
+ z->dev.bus = &zorro_bus_type;
+ device_register(&z->dev);
+ zorro_create_sysfs_dev_files(z);
+ }
+
+ /* Mark all available Zorro II memory */
+ zorro_for_each_dev(z) {
+ if (z->rom.er_Type & ERTF_MEMLIST)
+ mark_region(zorro_resource_start(z), zorro_resource_end(z)+1, 1);
+ }
+
+ /* Unmark all used Zorro II memory */
+ for (i = 0; i < m68k_num_memory; i++)
+ if (m68k_memory[i].addr < 16*1024*1024)
+ mark_region(m68k_memory[i].addr,
+ m68k_memory[i].addr+m68k_memory[i].size, 0);
+
+ return 0;
+}
+
+subsys_initcall(zorro_init);
+
+EXPORT_SYMBOL(zorro_find_device);
+EXPORT_SYMBOL(zorro_unused_z2ram);
+
+MODULE_LICENSE("GPL");