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-rw-r--r--drivers/zorro/zorro.c246
1 files changed, 246 insertions, 0 deletions
diff --git a/drivers/zorro/zorro.c b/drivers/zorro/zorro.c
new file mode 100644
index 000000000..1b9928648
--- /dev/null
+++ b/drivers/zorro/zorro.c
@@ -0,0 +1,246 @@
+/*
+ * 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 <linux/string.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/slab.h>
+
+#include <asm/byteorder.h>
+#include <asm/setup.h>
+#include <asm/amigahw.h>
+
+#include "zorro.h"
+
+
+ /*
+ * Zorro Expansion Devices
+ */
+
+unsigned int zorro_num_autocon;
+struct zorro_dev_init zorro_autocon_init[ZORRO_NUM_AUTO] __initdata;
+struct zorro_dev *zorro_autocon;
+
+
+ /*
+ * Zorro bus
+ */
+
+struct zorro_bus {
+ struct device dev;
+ struct zorro_dev devices[];
+};
+
+
+ /*
+ * Find Zorro Devices
+ */
+
+struct zorro_dev *zorro_find_device(zorro_id id, struct zorro_dev *from)
+{
+ struct zorro_dev *z;
+
+ if (!zorro_num_autocon)
+ 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;
+}
+EXPORT_SYMBOL(zorro_find_device);
+
+
+ /*
+ * 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);
+EXPORT_SYMBOL(zorro_unused_z2ram);
+
+
+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 platform_device *bridge, struct zorro_dev *z)
+{
+ int i;
+
+ for (i = 0; i < bridge->num_resources; i++) {
+ struct resource *r = &bridge->resource[i];
+
+ if (zorro_resource_start(z) >= r->start &&
+ zorro_resource_end(z) <= r->end)
+ return r;
+ }
+ return &iomem_resource;
+}
+
+
+
+static int __init amiga_zorro_probe(struct platform_device *pdev)
+{
+ struct zorro_bus *bus;
+ struct zorro_dev_init *zi;
+ struct zorro_dev *z;
+ struct resource *r;
+ unsigned int i;
+ int error;
+
+ /* Initialize the Zorro bus */
+ bus = kzalloc(struct_size(bus, devices, zorro_num_autocon),
+ GFP_KERNEL);
+ if (!bus)
+ return -ENOMEM;
+
+ zorro_autocon = bus->devices;
+ bus->dev.parent = &pdev->dev;
+ dev_set_name(&bus->dev, zorro_bus_type.name);
+ error = device_register(&bus->dev);
+ if (error) {
+ pr_err("Zorro: Error registering zorro_bus\n");
+ put_device(&bus->dev);
+ kfree(bus);
+ return error;
+ }
+ platform_set_drvdata(pdev, bus);
+
+ pr_info("Zorro: Probing AutoConfig expansion devices: %u device%s\n",
+ zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s");
+
+ /* First identify all devices ... */
+ for (i = 0; i < zorro_num_autocon; i++) {
+ zi = &zorro_autocon_init[i];
+ z = &zorro_autocon[i];
+
+ z->rom = zi->rom;
+ z->id = (be16_to_cpu(z->rom.er_Manufacturer) << 16) |
+ (z->rom.er_Product << 8);
+ if (z->id == ZORRO_PROD_GVP_EPC_BASE) {
+ /* GVP quirk */
+ unsigned long magic = zi->boardaddr + 0x8000;
+
+ z->id |= *(u16 *)ZTWO_VADDR(magic) & GVP_PRODMASK;
+ }
+ z->slotaddr = zi->slotaddr;
+ z->slotsize = zi->slotsize;
+ sprintf(z->name, "Zorro device %08x", z->id);
+ zorro_name_device(z);
+ z->resource.start = zi->boardaddr;
+ z->resource.end = zi->boardaddr + zi->boardsize - 1;
+ z->resource.name = z->name;
+ r = zorro_find_parent_resource(pdev, z);
+ error = request_resource(r, &z->resource);
+ if (error && !(z->rom.er_Type & ERTF_MEMLIST))
+ dev_err(&bus->dev,
+ "Address space collision on device %s %pR\n",
+ z->name, &z->resource);
+ z->dev.parent = &bus->dev;
+ z->dev.bus = &zorro_bus_type;
+ z->dev.id = i;
+ switch (z->rom.er_Type & ERT_TYPEMASK) {
+ case ERT_ZORROIII:
+ z->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+ break;
+
+ case ERT_ZORROII:
+ default:
+ z->dev.coherent_dma_mask = DMA_BIT_MASK(24);
+ break;
+ }
+ z->dev.dma_mask = &z->dev.coherent_dma_mask;
+ }
+
+ /* ... then register them */
+ for (i = 0; i < zorro_num_autocon; i++) {
+ z = &zorro_autocon[i];
+ error = device_register(&z->dev);
+ if (error) {
+ dev_err(&bus->dev, "Error registering device %s\n",
+ z->name);
+ put_device(&z->dev);
+ continue;
+ }
+ }
+
+ /* 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;
+}
+
+static struct platform_driver amiga_zorro_driver = {
+ .driver = {
+ .name = "amiga-zorro",
+ },
+};
+
+static int __init amiga_zorro_init(void)
+{
+ return platform_driver_probe(&amiga_zorro_driver, amiga_zorro_probe);
+}
+
+module_init(amiga_zorro_init);
+
+MODULE_LICENSE("GPL");