/* * Device probing and sysfs code. * * Copyright (C) 2005-2006  Kristian Hoegsberg <krh@bitplanet.net> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */#include <linux/module.h>#include <linux/wait.h>#include <linux/errno.h>#include <linux/kthread.h>#include <linux/device.h>#include <linux/delay.h>#include <linux/idr.h>#include <linux/rwsem.h>#include <asm/semaphore.h>#include <linux/ctype.h>#include "fw-transaction.h"#include "fw-topology.h"#include "fw-device.h"void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 * p){	ci->p = p + 1;	ci->end = ci->p + (p[0] >> 16);}EXPORT_SYMBOL(fw_csr_iterator_init);int fw_csr_iterator_next(struct fw_csr_iterator *ci, int *key, int *value){	*key = *ci->p >> 24;	*value = *ci->p & 0xffffff;	return ci->p++ < ci->end;}EXPORT_SYMBOL(fw_csr_iterator_next);static int is_fw_unit(struct device *dev);static int match_unit_directory(u32 * directory, const struct fw_device_id *id){	struct fw_csr_iterator ci;	int key, value, match;	match = 0;	fw_csr_iterator_init(&ci, directory);	while (fw_csr_iterator_next(&ci, &key, &value)) {		if (key == CSR_VENDOR && value == id->vendor)			match |= FW_MATCH_VENDOR;		if (key == CSR_MODEL && value == id->model)			match |= FW_MATCH_MODEL;		if (key == CSR_SPECIFIER_ID && value == id->specifier_id)			match |= FW_MATCH_SPECIFIER_ID;		if (key == CSR_VERSION && value == id->version)			match |= FW_MATCH_VERSION;	}	return (match & id->match_flags) == id->match_flags;}static int fw_unit_match(struct device *dev, struct device_driver *drv){	struct fw_unit *unit = fw_unit(dev);	struct fw_driver *driver = fw_driver(drv);	int i;	/* We only allow binding to fw_units. */	if (!is_fw_unit(dev))		return 0;	for (i = 0; driver->id_table[i].match_flags != 0; i++) {		if (match_unit_directory(unit->directory, &driver->id_table[i]))			return 1;	}	return 0;}static int get_modalias(struct fw_unit *unit, char *buffer, size_t buffer_size){	struct fw_device *device = fw_device(unit->device.parent);	struct fw_csr_iterator ci;	int key, value;	int vendor = 0;	int model = 0;	int specifier_id = 0;	int version = 0;	fw_csr_iterator_init(&ci, &device->config_rom[5]);	while (fw_csr_iterator_next(&ci, &key, &value)) {		switch (key) {		case CSR_VENDOR:			vendor = value;			break;		case CSR_MODEL:			model = value;			break;		}	}	fw_csr_iterator_init(&ci, unit->directory);	while (fw_csr_iterator_next(&ci, &key, &value)) {		switch (key) {		case CSR_SPECIFIER_ID:			specifier_id = value;			break;		case CSR_VERSION:			version = value;			break;		}	}	return snprintf(buffer, buffer_size,			"ieee1394:ven%08Xmo%08Xsp%08Xver%08X",			vendor, model, specifier_id, version);}static intfw_unit_uevent(struct device *dev, struct kobj_uevent_env *env){	struct fw_unit *unit = fw_unit(dev);	char modalias[64];	get_modalias(unit, modalias, sizeof(modalias));	if (add_uevent_var(env, "MODALIAS=%s", modalias))		return -ENOMEM;	return 0;}struct bus_type fw_bus_type = {	.name = "firewire",	.match = fw_unit_match,};EXPORT_SYMBOL(fw_bus_type);struct fw_device *fw_device_get(struct fw_device *device){	get_device(&device->device);	return device;}void fw_device_put(struct fw_device *device){	put_device(&device->device);}static void fw_device_release(struct device *dev){	struct fw_device *device = fw_device(dev);	unsigned long flags;	/*	 * Take the card lock so we don't set this to NULL while a	 * FW_NODE_UPDATED callback is being handled.	 */	spin_lock_irqsave(&device->card->lock, flags);	device->node->data = NULL;	spin_unlock_irqrestore(&device->card->lock, flags);	fw_node_put(device->node);	fw_card_put(device->card);	kfree(device->config_rom);	kfree(device);}int fw_device_enable_phys_dma(struct fw_device *device){	return device->card->driver->enable_phys_dma(device->card,						     device->node_id,						     device->generation);}EXPORT_SYMBOL(fw_device_enable_phys_dma);struct config_rom_attribute {	struct device_attribute attr;	u32 key;};static ssize_tshow_immediate(struct device *dev, struct device_attribute *dattr, char *buf){	struct config_rom_attribute *attr =		container_of(dattr, struct config_rom_attribute, attr);	struct fw_csr_iterator ci;	u32 *dir;	int key, value;	if (is_fw_unit(dev))		dir = fw_unit(dev)->directory;	else		dir = fw_device(dev)->config_rom + 5;	fw_csr_iterator_init(&ci, dir);	while (fw_csr_iterator_next(&ci, &key, &value))		if (attr->key == key)			return snprintf(buf, buf ? PAGE_SIZE : 0,					"0x%06x\n", value);	return -ENOENT;}#define IMMEDIATE_ATTR(name, key)				\	{ __ATTR(name, S_IRUGO, show_immediate, NULL), key }static ssize_tshow_text_leaf(struct device *dev, struct device_attribute *dattr, char *buf){	struct config_rom_attribute *attr =		container_of(dattr, struct config_rom_attribute, attr);	struct fw_csr_iterator ci;	u32 *dir, *block = NULL, *p, *end;	int length, key, value, last_key = 0;	char *b;	if (is_fw_unit(dev))		dir = fw_unit(dev)->directory;	else		dir = fw_device(dev)->config_rom + 5;	fw_csr_iterator_init(&ci, dir);	while (fw_csr_iterator_next(&ci, &key, &value)) {		if (attr->key == last_key &&		    key == (CSR_DESCRIPTOR | CSR_LEAF))			block = ci.p - 1 + value;		last_key = key;	}	if (block == NULL)		return -ENOENT;	length = min(block[0] >> 16, 256U);	if (length < 3)		return -ENOENT;	if (block[1] != 0 || block[2] != 0)		/* Unknown encoding. */		return -ENOENT;	if (buf == NULL)		return length * 4;	b = buf;	end = &block[length + 1];	for (p = &block[3]; p < end; p++, b += 4)		* (u32 *) b = (__force u32) __cpu_to_be32(*p);	/* Strip trailing whitespace and add newline. */	while (b--, (isspace(*b) || *b == '\0') && b > buf);	strcpy(b + 1, "\n");	return b + 2 - buf;}#define TEXT_LEAF_ATTR(name, key)				\	{ __ATTR(name, S_IRUGO, show_text_leaf, NULL), key }static struct config_rom_attribute config_rom_attributes[] = {	IMMEDIATE_ATTR(vendor, CSR_VENDOR),	IMMEDIATE_ATTR(hardware_version, CSR_HARDWARE_VERSION),	IMMEDIATE_ATTR(specifier_id, CSR_SPECIFIER_ID),	IMMEDIATE_ATTR(version, CSR_VERSION),	IMMEDIATE_ATTR(model, CSR_MODEL),	TEXT_LEAF_ATTR(vendor_name, CSR_VENDOR),	TEXT_LEAF_ATTR(model_name, CSR_MODEL),	TEXT_LEAF_ATTR(hardware_version_name, CSR_HARDWARE_VERSION),};static voidinit_fw_attribute_group(struct device *dev,			struct device_attribute *attrs,			struct fw_attribute_group *group){	struct device_attribute *attr;	int i, j;	for (j = 0; attrs[j].attr.name != NULL; j++)		group->attrs[j] = &attrs[j].attr;	for (i = 0; i < ARRAY_SIZE(config_rom_attributes); i++) {		attr = &config_rom_attributes[i].attr;		if (attr->show(dev, attr, NULL) < 0)			continue;		group->attrs[j++] = &attr->attr;	}	BUG_ON(j >= ARRAY_SIZE(group->attrs));	group->attrs[j++] = NULL;	group->groups[0] = &group->group;	group->groups[1] = NULL;	group->group.attrs = group->attrs;	dev->groups = group->groups;}static ssize_tmodalias_show(struct device *dev,	      struct device_attribute *attr, char *buf){	struct fw_unit *unit = fw_unit(dev);	int length;	length = get_modalias(unit, buf, PAGE_SIZE);	strcpy(buf + length, "\n");	return length + 1;}static ssize_trom_index_show(struct device *dev,	       struct device_attribute *attr, char *buf){	struct fw_device *device = fw_device(dev->parent);	struct fw_unit *unit = fw_unit(dev);	return snprintf(buf, PAGE_SIZE, "%d\n",			(int)(unit->directory - device->config_rom));}static struct device_attribute fw_unit_attributes[] = {	__ATTR_RO(modalias),	__ATTR_RO(rom_index),	__ATTR_NULL,};static ssize_tconfig_rom_show(struct device *dev, struct device_attribute *attr, char *buf){	struct fw_device *device = fw_device(dev);	memcpy(buf, device->config_rom, device->config_rom_length * 4);	return device->config_rom_length * 4;}static ssize_tguid_show(struct device *dev, struct device_attribute *attr, char *buf){	struct fw_device *device = fw_device(dev);	u64 guid;	guid = ((u64)device->config_rom[3] << 32) | device->config_rom[4];	return snprintf(buf, PAGE_SIZE, "0x%016llx\n",			(unsigned long long)guid);}static struct device_attribute fw_device_attributes[] = {	__ATTR_RO(config_rom),	__ATTR_RO(guid),	__ATTR_NULL,};struct read_quadlet_callback_data {	struct completion done;	int rcode;	u32 data;};static voidcomplete_transaction(struct fw_card *card, int rcode,		     void *payload, size_t length, void *data){	struct read_quadlet_callback_data *callback_data = data;	if (rcode == RCODE_COMPLETE)		callback_data->data = be32_to_cpu(*(__be32 *)payload);	callback_data->rcode = rcode;	complete(&callback_data->done);}static int read_rom(struct fw_device *device, int index, u32 * data){	struct read_quadlet_callback_data callback_data;	struct fw_transaction t;	u64 offset;	init_completion(&callback_data.done);	offset = 0xfffff0000400ULL + index * 4;	fw_send_request(device->card, &t, TCODE_READ_QUADLET_REQUEST,			device->node_id, device->generation, device->max_speed,			offset, NULL, 4, complete_transaction, &callback_data);	wait_for_completion(&callback_data.done);	*data = callback_data.data;	return callback_data.rcode;}static int read_bus_info_block(struct fw_device *device){	static u32 rom[256];	u32 stack[16], sp, key;	int i, end, length;	device->max_speed = SCODE_100;	/* First read the bus info block. */	for (i = 0; i < 5; i++) {		if (read_rom(device, i, &rom[i]) != RCODE_COMPLETE)			return -1;		/*