Commit 9b6a5174 authored by Linus Torvalds's avatar Linus Torvalds

Merge branch 'juju' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6

* 'juju' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: (138 commits)
  firewire: Convert OHCI driver to use standard goto unwinding for error handling.
  firewire: Always use parens with sizeof.
  firewire: Drop single buffer request support.
  firewire: Add a comment to describe why we split the sg list.
  firewire: Return SCSI_MLQUEUE_HOST_BUSY for out of memory cases in queuecommand.
  firewire: Handle the last few DMA mapping error cases.
  firewire: Allocate scsi_host up front and allocate the sbp2_device as hostdata.
  firewire: Provide module aliase for backwards compatibility.
  firewire: Add to fw-core-y instead of assigning fw-core-objs in Makefile.
  firewire: Break out shared IEEE1394 constant to separate header file.
  firewire: Use linux/*.h instead of asm/*.h header files.
  firewire: Uppercase most macro names.
  firewire: Coding style cleanup: no spaces after function names.
  firewire: Convert card_rwsem to a regular mutex.
  firewire: Clean up comment style.
  firewire: Use lib/ implementation of CRC ITU-T.
  CRC ITU-T V.41
  firewire: Rename fw-device-cdev.c to fw-cdev.c and move header to include/linux.
  firewire: Future proof the iso ioctls by adding a handle for the iso context.
  firewire: Add read/write and size annotations to IOC numbers.
  ...
Acked-by: default avatarChristoph Hellwig <hch@infradead.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parents fc0b60f1 d79406dd
......@@ -36,6 +36,7 @@ obj-$(CONFIG_FC4) += fc4/
obj-$(CONFIG_SCSI) += scsi/
obj-$(CONFIG_ATA) += ata/
obj-$(CONFIG_FUSION) += message/
obj-$(CONFIG_FIREWIRE) += firewire/
obj-$(CONFIG_IEEE1394) += ieee1394/
obj-y += cdrom/
obj-y += auxdisplay/
......
# -*- shell-script -*-
comment "An alternative FireWire stack is available with EXPERIMENTAL=y"
depends on EXPERIMENTAL=n
config FIREWIRE
tristate "IEEE 1394 (FireWire) support (JUJU alternative stack, experimental)"
depends on EXPERIMENTAL
select CRC_ITU_T
help
IEEE 1394 describes a high performance serial bus, which is also
known as FireWire(tm) or i.Link(tm) and is used for connecting all
sorts of devices (most notably digital video cameras) to your
computer.
If you have FireWire hardware and want to use it, say Y here. This
is the core support only, you will also need to select a driver for
your IEEE 1394 adapter.
To compile this driver as a module, say M here: the module will be
called fw-core.
This is the "JUJU" FireWire stack, an alternative implementation
designed for robustness and simplicity. You can build either this
stack, or the classic stack (the ieee1394 driver, ohci1394 etc.)
or both.
config FIREWIRE_OHCI
tristate "Support for OHCI FireWire host controllers"
depends on PCI && FIREWIRE
help
Enable this driver if you have a FireWire controller based
on the OHCI specification. For all practical purposes, this
is the only chipset in use, so say Y here.
To compile this driver as a module, say M here: The module will be
called fw-ohci.
If you also build ohci1394 of the classic IEEE 1394 driver stack,
blacklist either ohci1394 or fw-ohci to let hotplug load the desired
driver.
config FIREWIRE_SBP2
tristate "Support for storage devices (SBP-2 protocol driver)"
depends on FIREWIRE && SCSI
help
This option enables you to use SBP-2 devices connected to a
FireWire bus. SBP-2 devices include storage devices like
harddisks and DVD drives, also some other FireWire devices
like scanners.
To compile this driver as a module, say M here: The module will be
called fw-sbp2.
You should also enable support for disks, CD-ROMs, etc. in the SCSI
configuration section.
If you also build sbp2 of the classic IEEE 1394 driver stack,
blacklist either sbp2 or fw-sbp2 to let hotplug load the desired
driver.
#
# Makefile for the Linux IEEE 1394 implementation
#
fw-core-y += fw-card.o fw-topology.o fw-transaction.o fw-iso.o \
fw-device.o fw-cdev.o
obj-$(CONFIG_FIREWIRE) += fw-core.o
obj-$(CONFIG_FIREWIRE_OHCI) += fw-ohci.o
obj-$(CONFIG_FIREWIRE_SBP2) += fw-sbp2.o
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/*
* 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.
*/
#ifndef __fw_device_h
#define __fw_device_h
#include <linux/fs.h>
#include <linux/cdev.h>
#include <asm/atomic.h>
enum fw_device_state {
FW_DEVICE_INITIALIZING,
FW_DEVICE_RUNNING,
FW_DEVICE_SHUTDOWN,
};
struct fw_attribute_group {
struct attribute_group *groups[2];
struct attribute_group group;
struct attribute *attrs[11];
};
struct fw_device {
atomic_t state;
struct fw_node *node;
int node_id;
int generation;
struct fw_card *card;
struct device device;
struct list_head link;
struct list_head client_list;
u32 *config_rom;
size_t config_rom_length;
int config_rom_retries;
struct delayed_work work;
struct fw_attribute_group attribute_group;
};
static inline struct fw_device *
fw_device(struct device *dev)
{
return container_of(dev, struct fw_device, device);
}
static inline int
fw_device_is_shutdown(struct fw_device *device)
{
return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN;
}
struct fw_device *fw_device_get(struct fw_device *device);
void fw_device_put(struct fw_device *device);
int fw_device_enable_phys_dma(struct fw_device *device);
void fw_device_cdev_update(struct fw_device *device);
void fw_device_cdev_remove(struct fw_device *device);
struct fw_device *fw_device_from_devt(dev_t devt);
extern int fw_cdev_major;
struct fw_unit {
struct device device;
u32 *directory;
struct fw_attribute_group attribute_group;
};
static inline struct fw_unit *
fw_unit(struct device *dev)
{
return container_of(dev, struct fw_unit, device);
}
#define CSR_OFFSET 0x40
#define CSR_LEAF 0x80
#define CSR_DIRECTORY 0xc0
#define CSR_DESCRIPTOR 0x01
#define CSR_VENDOR 0x03
#define CSR_HARDWARE_VERSION 0x04
#define CSR_NODE_CAPABILITIES 0x0c
#define CSR_UNIT 0x11
#define CSR_SPECIFIER_ID 0x12
#define CSR_VERSION 0x13
#define CSR_DEPENDENT_INFO 0x14
#define CSR_MODEL 0x17
#define CSR_INSTANCE 0x18
#define SBP2_COMMAND_SET_SPECIFIER 0x38
#define SBP2_COMMAND_SET 0x39
#define SBP2_COMMAND_SET_REVISION 0x3b
#define SBP2_FIRMWARE_REVISION 0x3c
struct fw_csr_iterator {
u32 *p;
u32 *end;
};
void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 *p);
int fw_csr_iterator_next(struct fw_csr_iterator *ci,
int *key, int *value);
#define FW_MATCH_VENDOR 0x0001
#define FW_MATCH_MODEL 0x0002
#define FW_MATCH_SPECIFIER_ID 0x0004
#define FW_MATCH_VERSION 0x0008
struct fw_device_id {
u32 match_flags;
u32 vendor;
u32 model;
u32 specifier_id;
u32 version;
void *driver_data;
};
struct fw_driver {
struct device_driver driver;
/* Called when the parent device sits through a bus reset. */
void (*update) (struct fw_unit *unit);
const struct fw_device_id *id_table;
};
static inline struct fw_driver *
fw_driver(struct device_driver *drv)
{
return container_of(drv, struct fw_driver, driver);
}
extern const struct file_operations fw_device_ops;
#endif /* __fw_device_h */
/*
* Isochronous IO functionality
*
* Copyright (C) 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/kernel.h>
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/vmalloc.h>
#include <linux/mm.h>
#include "fw-transaction.h"
#include "fw-topology.h"
#include "fw-device.h"
int
fw_iso_buffer_init(struct fw_iso_buffer *buffer, struct fw_card *card,
int page_count, enum dma_data_direction direction)
{
int i, j, retval = -ENOMEM;
dma_addr_t address;
buffer->page_count = page_count;
buffer->direction = direction;
buffer->pages = kmalloc(page_count * sizeof(buffer->pages[0]),
GFP_KERNEL);
if (buffer->pages == NULL)
goto out;
for (i = 0; i < buffer->page_count; i++) {
buffer->pages[i] = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO);
if (buffer->pages[i] == NULL)
goto out_pages;
address = dma_map_page(card->device, buffer->pages[i],
0, PAGE_SIZE, direction);
if (dma_mapping_error(address)) {
__free_page(buffer->pages[i]);
goto out_pages;
}
set_page_private(buffer->pages[i], address);
}
return 0;
out_pages:
for (j = 0; j < i; j++) {
address = page_private(buffer->pages[j]);
dma_unmap_page(card->device, address,
PAGE_SIZE, DMA_TO_DEVICE);
__free_page(buffer->pages[j]);
}
kfree(buffer->pages);
out:
buffer->pages = NULL;
return retval;
}
int fw_iso_buffer_map(struct fw_iso_buffer *buffer, struct vm_area_struct *vma)
{
unsigned long uaddr;
int i, retval;
uaddr = vma->vm_start;
for (i = 0; i < buffer->page_count; i++) {
retval = vm_insert_page(vma, uaddr, buffer->pages[i]);
if (retval)
return retval;
uaddr += PAGE_SIZE;
}
return 0;
}
void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer,
struct fw_card *card)
{
int i;
dma_addr_t address;
for (i = 0; i < buffer->page_count; i++) {
address = page_private(buffer->pages[i]);
dma_unmap_page(card->device, address,
PAGE_SIZE, DMA_TO_DEVICE);
__free_page(buffer->pages[i]);
}
kfree(buffer->pages);
buffer->pages = NULL;
}
struct fw_iso_context *
fw_iso_context_create(struct fw_card *card, int type,
int channel, int speed, size_t header_size,
fw_iso_callback_t callback, void *callback_data)
{
struct fw_iso_context *ctx;
ctx = card->driver->allocate_iso_context(card, type, header_size);
if (IS_ERR(ctx))
return ctx;
ctx->card = card;
ctx->type = type;
ctx->channel = channel;
ctx->speed = speed;
ctx->header_size = header_size;
ctx->callback = callback;
ctx->callback_data = callback_data;
return ctx;
}
EXPORT_SYMBOL(fw_iso_context_create);
void fw_iso_context_destroy(struct fw_iso_context *ctx)
{
struct fw_card *card = ctx->card;
card->driver->free_iso_context(ctx);
}
EXPORT_SYMBOL(fw_iso_context_destroy);
int
fw_iso_context_start(struct fw_iso_context *ctx, int cycle, int sync, int tags)
{
return ctx->card->driver->start_iso(ctx, cycle, sync, tags);
}
EXPORT_SYMBOL(fw_iso_context_start);
int
fw_iso_context_queue(struct fw_iso_context *ctx,
struct fw_iso_packet *packet,
struct fw_iso_buffer *buffer,
unsigned long payload)
{
struct fw_card *card = ctx->card;
return card->driver->queue_iso(ctx, packet, buffer, payload);
}
EXPORT_SYMBOL(fw_iso_context_queue);
int
fw_iso_context_stop(struct fw_iso_context *ctx)
{
return ctx->card->driver->stop_iso(ctx);
}
EXPORT_SYMBOL(fw_iso_context_stop);
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#ifndef __fw_ohci_h
#define __fw_ohci_h
/* OHCI register map */
#define OHCI1394_Version 0x000
#define OHCI1394_GUID_ROM 0x004
#define OHCI1394_ATRetries 0x008
#define OHCI1394_CSRData 0x00C
#define OHCI1394_CSRCompareData 0x010
#define OHCI1394_CSRControl 0x014
#define OHCI1394_ConfigROMhdr 0x018
#define OHCI1394_BusID 0x01C
#define OHCI1394_BusOptions 0x020
#define OHCI1394_GUIDHi 0x024
#define OHCI1394_GUIDLo 0x028
#define OHCI1394_ConfigROMmap 0x034
#define OHCI1394_PostedWriteAddressLo 0x038
#define OHCI1394_PostedWriteAddressHi 0x03C
#define OHCI1394_VendorID 0x040
#define OHCI1394_HCControlSet 0x050
#define OHCI1394_HCControlClear 0x054
#define OHCI1394_HCControl_BIBimageValid 0x80000000
#define OHCI1394_HCControl_noByteSwapData 0x40000000
#define OHCI1394_HCControl_programPhyEnable 0x00800000
#define OHCI1394_HCControl_aPhyEnhanceEnable 0x00400000
#define OHCI1394_HCControl_LPS 0x00080000
#define OHCI1394_HCControl_postedWriteEnable 0x00040000
#define OHCI1394_HCControl_linkEnable 0x00020000
#define OHCI1394_HCControl_softReset 0x00010000
#define OHCI1394_SelfIDBuffer 0x064
#define OHCI1394_SelfIDCount 0x068
#define OHCI1394_IRMultiChanMaskHiSet 0x070
#define OHCI1394_IRMultiChanMaskHiClear 0x074
#define OHCI1394_IRMultiChanMaskLoSet 0x078
#define OHCI1394_IRMultiChanMaskLoClear 0x07C
#define OHCI1394_IntEventSet 0x080
#define OHCI1394_IntEventClear 0x084
#define OHCI1394_IntMaskSet 0x088
#define OHCI1394_IntMaskClear 0x08C
#define OHCI1394_IsoXmitIntEventSet 0x090
#define OHCI1394_IsoXmitIntEventClear 0x094
#define OHCI1394_IsoXmitIntMaskSet 0x098
#define OHCI1394_IsoXmitIntMaskClear 0x09C
#define OHCI1394_IsoRecvIntEventSet 0x0A0
#define OHCI1394_IsoRecvIntEventClear 0x0A4
#define OHCI1394_IsoRecvIntMaskSet 0x0A8
#define OHCI1394_IsoRecvIntMaskClear 0x0AC
#define OHCI1394_InitialBandwidthAvailable 0x0B0
#define OHCI1394_InitialChannelsAvailableHi 0x0B4
#define OHCI1394_InitialChannelsAvailableLo 0x0B8
#define OHCI1394_FairnessControl 0x0DC
#define OHCI1394_LinkControlSet 0x0E0
#define OHCI1394_LinkControlClear 0x0E4
#define OHCI1394_LinkControl_rcvSelfID (1 << 9)
#define OHCI1394_LinkControl_rcvPhyPkt (1 << 10)
#define OHCI1394_LinkControl_cycleTimerEnable (1 << 20)
#define OHCI1394_LinkControl_cycleMaster (1 << 21)
#define OHCI1394_LinkControl_cycleSource (1 << 22)
#define OHCI1394_NodeID 0x0E8
#define OHCI1394_NodeID_idValid 0x80000000
#define OHCI1394_PhyControl 0x0EC
#define OHCI1394_PhyControl_Read(addr) (((addr) << 8) | 0x00008000)
#define OHCI1394_PhyControl_ReadDone 0x80000000
#define OHCI1394_PhyControl_ReadData(r) (((r) & 0x00ff0000) >> 16)
#define OHCI1394_PhyControl_Write(addr, data) (((addr) << 8) | (data) | 0x00004000)
#define OHCI1394_PhyControl_WriteDone 0x00004000
#define OHCI1394_IsochronousCycleTimer 0x0F0
#define OHCI1394_AsReqFilterHiSet 0x100
#define OHCI1394_AsReqFilterHiClear 0x104
#define OHCI1394_AsReqFilterLoSet 0x108
#define OHCI1394_AsReqFilterLoClear 0x10C
#define OHCI1394_PhyReqFilterHiSet 0x110
#define OHCI1394_PhyReqFilterHiClear 0x114
#define OHCI1394_PhyReqFilterLoSet 0x118
#define OHCI1394_PhyReqFilterLoClear 0x11C
#define OHCI1394_PhyUpperBound 0x120
#define OHCI1394_AsReqTrContextBase 0x180
#define OHCI1394_AsReqTrContextControlSet 0x180
#define OHCI1394_AsReqTrContextControlClear 0x184
#define OHCI1394_AsReqTrCommandPtr 0x18C
#define OHCI1394_AsRspTrContextBase 0x1A0
#define OHCI1394_AsRspTrContextControlSet 0x1A0
#define OHCI1394_AsRspTrContextControlClear 0x1A4
#define OHCI1394_AsRspTrCommandPtr 0x1AC
#define OHCI1394_AsReqRcvContextBase 0x1C0
#define OHCI1394_AsReqRcvContextControlSet 0x1C0
#define OHCI1394_AsReqRcvContextControlClear 0x1C4
#define OHCI1394_AsReqRcvCommandPtr 0x1CC
#define OHCI1394_AsRspRcvContextBase 0x1E0
#define OHCI1394_AsRspRcvContextControlSet 0x1E0
#define OHCI1394_AsRspRcvContextControlClear 0x1E4
#define OHCI1394_AsRspRcvCommandPtr 0x1EC
/* Isochronous transmit registers */
#define OHCI1394_IsoXmitContextBase(n) (0x200 + 16 * (n))
#define OHCI1394_IsoXmitContextControlSet(n) (0x200 + 16 * (n))
#define OHCI1394_IsoXmitContextControlClear(n) (0x204 + 16 * (n))
#define OHCI1394_IsoXmitCommandPtr(n) (0x20C + 16 * (n))
/* Isochronous receive registers */
#define OHCI1394_IsoRcvContextBase(n) (0x400 + 32 * (n))
#define OHCI1394_IsoRcvContextControlSet(n) (0x400 + 32 * (n))
#define OHCI1394_IsoRcvContextControlClear(n) (0x404 + 32 * (n))
#define OHCI1394_IsoRcvCommandPtr(n) (0x40C + 32 * (n))
#define OHCI1394_IsoRcvContextMatch(n) (0x410 + 32 * (n))
/* Interrupts Mask/Events */
#define OHCI1394_reqTxComplete 0x00000001
#define OHCI1394_respTxComplete 0x00000002
#define OHCI1394_ARRQ 0x00000004
#define OHCI1394_ARRS 0x00000008
#define OHCI1394_RQPkt 0x00000010
#define OHCI1394_RSPkt 0x00000020
#define OHCI1394_isochTx 0x00000040
#define OHCI1394_isochRx 0x00000080
#define OHCI1394_postedWriteErr 0x00000100
#define OHCI1394_lockRespErr 0x00000200
#define OHCI1394_selfIDComplete 0x00010000
#define OHCI1394_busReset 0x00020000
#define OHCI1394_phy 0x00080000
#define OHCI1394_cycleSynch 0x00100000
#define OHCI1394_cycle64Seconds 0x00200000
#define OHCI1394_cycleLost 0x00400000
#define OHCI1394_cycleInconsistent 0x00800000
#define OHCI1394_unrecoverableError 0x01000000
#define OHCI1394_cycleTooLong 0x02000000
#define OHCI1394_phyRegRcvd 0x04000000
#define OHCI1394_masterIntEnable 0x80000000
#define OHCI1394_evt_no_status 0x0
#define OHCI1394_evt_long_packet 0x2
#define OHCI1394_evt_missing_ack 0x3
#define OHCI1394_evt_underrun 0x4
#define OHCI1394_evt_overrun 0x5
#define OHCI1394_evt_descriptor_read 0x6
#define OHCI1394_evt_data_read 0x7
#define OHCI1394_evt_data_write 0x8
#define OHCI1394_evt_bus_reset 0x9
#define OHCI1394_evt_timeout 0xa
#define OHCI1394_evt_tcode_err 0xb
#define OHCI1394_evt_reserved_b 0xc
#define OHCI1394_evt_reserved_c 0xd
#define OHCI1394_evt_unknown 0xe
#define OHCI1394_evt_flushed 0xf
#define OHCI1394_phy_tcode 0xe
#endif /* __fw_ohci_h */
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/*
* Copyright (C) 2003-2006 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.
*/
#ifndef __fw_topology_h
#define __fw_topology_h
enum {
FW_TOPOLOGY_A = 0x01,
FW_TOPOLOGY_B = 0x02,
FW_TOPOLOGY_MIXED = 0x03,
};
enum {
FW_NODE_CREATED = 0x00,
FW_NODE_UPDATED = 0x01,
FW_NODE_DESTROYED = 0x02,
FW_NODE_LINK_ON = 0x03,
FW_NODE_LINK_OFF = 0x04,
};
struct fw_port {
struct fw_node *node;
unsigned speed : 3; /* S100, S200, ... S3200 */
};
struct fw_node {
u16 node_id;
u8 color;
u8 port_count;
unsigned link_on : 1;
unsigned initiated_reset : 1;
unsigned b_path : 1;
u8 phy_speed : 3; /* As in the self ID packet. */
u8 max_speed : 5; /* Minimum of all phy-speeds and port speeds on
* the path from the local node to this node. */
u8 max_depth : 4; /* Maximum depth to any leaf node */
u8 max_hops : 4; /* Max hops in this sub tree */
atomic_t ref_count;
/* For serializing node topology into a list. */
struct list_head link;
/* Upper layer specific data. */
void *data;
struct fw_port ports[0];
};
static inline struct fw_node *
fw_node(struct list_head *l)
{
return list_entry(l, struct fw_node, link);
}
static inline struct fw_node *
fw_node_get(struct fw_node *node)
{
atomic_inc(&node->ref_count);
return node;
}
static inline void
fw_node_put(struct fw_node *node)
{
if (atomic_dec_and_test(&node->ref_count))
kfree(node);
}
void
fw_destroy_nodes(struct fw_card *card);
int
fw_compute_block_crc(u32 *block);
#endif /* __fw_topology_h */
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menu "IEEE 1394 (FireWire) support"
depends on PCI || BROKEN
source "drivers/firewire/Kconfig"
config IEEE1394
tristate "IEEE 1394 (FireWire) support"
depends on PCI || BROKEN
......
/*
* crc-itu-t.h - CRC ITU-T V.41 routine
*
* Implements the standard CRC ITU-T V.41:
* Width 16
* Poly 0x0x1021 (x^16 + x^12 + x^15 + 1)
* Init 0
*
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
*/
#ifndef CRC_ITU_T_H
#define CRC_ITU_T_H
#include <linux/types.h>
extern u16 const crc_itu_t_table[256];
extern u16 crc_itu_t(u16 crc, const u8 *buffer, size_t len);
static inline u16 crc_itu_t_byte(u16 crc, const u8 data)
{
return (crc << 8) ^ crc_itu_t_table[((crc >> 8) ^ data) & 0xff];
}
#endif /* CRC_ITU_T_H */
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......@@ -23,6 +23,14 @@ config CRC16
the kernel tree does. Such modules that use library CRC16
functions require M here.
config CRC_ITU_T
tristate "CRC ITU-T V.41 functions"
help
This option is provided for the case where no in-kernel-tree
modules require CRC ITU-T V.41 functions, but a module built outside
the kernel tree does. Such modules that use library CRC ITU-T V.41
functions require M here.
config CRC32
tristate "CRC32 functions"
default y
......
......@@ -41,6 +41,7 @@ endif
obj-$(CONFIG_BITREVERSE) += bitrev.o
obj-$(CONFIG_CRC_CCITT) += crc-ccitt.o
obj-$(CONFIG_CRC16) += crc16.o
obj-$(CONFIG_CRC_ITU_T) += crc-itu-t.o
obj-$(CONFIG_CRC32) += crc32.o
obj-$(CONFIG_LIBCRC32C) += libcrc32c.o
obj-$(CONFIG_GENERIC_ALLOCATOR) += genalloc.o
......
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