linux-stable/drivers/firewire
Takashi Sakamoto 47dc55181d firewire: core: search descriptor leaf just after vendor directory entry in root directory
It appears that Sony DVMC-DA1 has a quirk that the descriptor leaf entry
locates just after the vendor directory entry in root directory. This is
not conformant to the legacy layout of configuration ROM described in
Configuration ROM for AV/C Devices 1.0 (1394 Trading Association, Dec 2000,
TA Document 1999027).

This commit changes current implementation to parse configuration ROM for
device attributes so that the descriptor leaf entry can be detected for
the vendor name.

$ config-rom-pretty-printer < Sony-DVMC-DA1.img
               ROM header and bus information block
               -----------------------------------------------------------------
1024  041ee7fb  bus_info_length 4, crc_length 30, crc 59387
1028  31333934  bus_name "1394"
1032  e0644000  irmc 1, cmc 1, isc 1, bmc 0, cyc_clk_acc 100, max_rec 4 (32)
1036  08004603  company_id 080046     |
1040  0014193c  device_id 12886219068  | EUI-64 576537731003586876

               root directory
               -----------------------------------------------------------------
1044  0006b681  directory_length 6, crc 46721
1048  03080046  vendor
1052  0c0083c0  node capabilities: per IEEE 1394
1056  8d00000a  --> eui-64 leaf at 1096
1060  d1000003  --> unit directory at 1072
1064  c3000005  --> vendor directory at 1084
1068  8100000a  --> descriptor leaf at 1108

               unit directory at 1072
               -----------------------------------------------------------------
1072  0002cdbf  directory_length 2, crc 52671
1076  1200a02d  specifier id
1080  13010000  version

               vendor directory at 1084
               -----------------------------------------------------------------
1084  00020cfe  directory_length 2, crc 3326
1088  17fa0000  model
1092  81000008  --> descriptor leaf at 1124

               eui-64 leaf at 1096
               -----------------------------------------------------------------
1096  0002c66e  leaf_length 2, crc 50798
1100  08004603  company_id 080046     |
1104  0014193c  device_id 12886219068  | EUI-64 576537731003586876

               descriptor leaf at 1108
               -----------------------------------------------------------------
1108  00039e26  leaf_length 3, crc 40486
1112  00000000  textual descriptor
1116  00000000  minimal ASCII
1120  536f6e79  "Sony"

               descriptor leaf at 1124
               -----------------------------------------------------------------
1124  0005001d  leaf_length 5, crc 29
1128  00000000  textual descriptor
1132  00000000  minimal ASCII
1136  44564d43  "DVMC"
1140  2d444131  "-DA1"
1144  00000000

Suggested-by: Adam Goldman <adamg@pobox.com>
Tested-by: Adam Goldman <adamg@pobox.com>
Link: https://lore.kernel.org/r/20240130100409.30128-3-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
2024-02-01 20:53:18 +09:00
..
.kunitconfig firewire: test: add KUnit test for device attributes 2024-01-08 09:36:56 +09:00
Kconfig firewire: test: add KUnit test for device attributes 2024-01-08 09:36:56 +09:00
Makefile firewire: add KUnit test to check layout of UAPI structures 2023-05-30 08:12:39 +09:00
core-card.c Merge branch 'for-linus' into for-next 2022-05-23 07:48:27 +02:00
core-cdev.c firewire: cdev: implement new event relevant to phy packet with time stamp 2023-05-30 08:12:40 +09:00
core-device.c firewire: core: search descriptor leaf just after vendor directory entry in root directory 2024-02-01 20:53:18 +09:00
core-iso.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
core-topology.c Revert "firewire: core: obsolete usage of GFP_ATOMIC at building node tree" 2023-09-15 18:37:52 +09:00
core-transaction.c firewire: core: implement variations to send request and wait for response with time stamp 2023-05-30 08:12:40 +09:00
core.h firewire: Annotate struct fw_node with __counted_by 2023-11-05 21:15:17 +09:00
device-attribute-test.c firewire: core: fill model field in modalias of unit device for legacy layout of configuration ROM 2024-01-10 18:37:13 +09:00
init_ohci1394_dma.c firewire: init_ohci1394_dma: use correct function names in comments 2023-04-24 09:19:35 +09:00
net.c firewire: net: fix use after free in fwnet_finish_incoming_packet() 2023-06-24 14:03:46 +09:00
nosy-user.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
nosy.c firewire: nosy: switch from 'pci_' to 'dma_' API 2021-07-05 22:23:15 +02:00
nosy.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ohci.c firewire: ohci: suppress unexpected system reboot in AMD Ryzen machines and ASM108x/VT630x PCIe cards 2024-01-05 21:28:08 +09:00
ohci.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sbp2.c scsi: Change SCSI device boolean fields to single bit flags 2023-11-24 20:44:21 -05:00
uapi-test.c firewire: fix build failure due to missing module license 2023-05-30 19:37:29 +09:00