Fixed MTP to work with TWRP

drivers/zorro/zorro.c

@@ -0,0 +1,236 @@
+/*
+ *    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/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[0];
+};
+
+
+    /*
+     *  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(sizeof(*bus) +
+		      zorro_num_autocon * sizeof(bus->devices[0]),
+		      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)
+			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;
+	}
+
+	/* ... 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;
+		}
+		error = zorro_create_sysfs_dev_files(z);
+		if (error)
+			dev_err(&z->dev, "Error creating sysfs files\n");
+	}
+
+	/* 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",
+		.owner	= THIS_MODULE,
+	},
+};
+
+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");