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linux/drivers/acpi/acpi_pnp.c
Hui Wang b08221c40f ACPI: PNP: compare the string length in the matching_id() 
Recently we met a touchscreen problem on some Thinkpad machines, the
touchscreen driver (i2c-hid) is not loaded and the touchscreen can't
work.

An i2c ACPI device with the name WACF2200 is defined in the BIOS, with
the current rule in matching_id(), this device will be regarded as
a PNP device since there is WACFXXX in the acpi_pnp_device_ids[] and
this PNP device is attached to the acpi device as the 1st
physical_node, this will make the i2c bus match fail when i2c bus
calls acpi_companion_match() to match the acpi_id_table in the i2c-hid
driver.

WACF2200 is an i2c device instead of a PNP device, after adding the
string length comparing, the matching_id() will return false when
matching WACF2200 and WACFXXX, and it is reasonable to compare the
string length when matching two IDs.

Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2020-12-15 19:30:49 +01:00

391 lines
14 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-only
/*
* ACPI support for PNP bus type
*
* Copyright (C) 2014, Intel Corporation
* Authors: Zhang Rui <rui.zhang@intel.com>
* Rafael J. Wysocki <rafael.j.wysocki@intel.com>
*/
#include <linux/acpi.h>
#include <linux/module.h>
#include <linux/ctype.h>
#include "internal.h"
static const struct acpi_device_id acpi_pnp_device_ids[] = {
/* pata_isapnp */
{"PNP0600"}, /* Generic ESDI/IDE/ATA compatible hard disk controller */
/* floppy */
{"PNP0700"},
/* tpm_inf_pnp */
{"IFX0101"}, /* Infineon TPMs */
{"IFX0102"}, /* Infineon TPMs */
/*tpm_tis */
{"PNP0C31"}, /* TPM */
{"ATM1200"}, /* Atmel */
{"IFX0102"}, /* Infineon */
{"BCM0101"}, /* Broadcom */
{"BCM0102"}, /* Broadcom */
{"NSC1200"}, /* National */
{"ICO0102"}, /* Intel */
/* ide */
{"PNP0600"}, /* Generic ESDI/IDE/ATA compatible hard disk controller */
/* ns558 */
{"ASB16fd"}, /* AdLib NSC16 */
{"AZT3001"}, /* AZT1008 */
{"CDC0001"}, /* Opl3-SAx */
{"CSC0001"}, /* CS4232 */
{"CSC000f"}, /* CS4236 */
{"CSC0101"}, /* CS4327 */
{"CTL7001"}, /* SB16 */
{"CTL7002"}, /* AWE64 */
{"CTL7005"}, /* Vibra16 */
{"ENS2020"}, /* SoundscapeVIVO */
{"ESS0001"}, /* ES1869 */
{"ESS0005"}, /* ES1878 */
{"ESS6880"}, /* ES688 */
{"IBM0012"}, /* CS4232 */
{"OPT0001"}, /* OPTi Audio16 */
{"YMH0006"}, /* Opl3-SA */
{"YMH0022"}, /* Opl3-SAx */
{"PNPb02f"}, /* Generic */
/* i8042 kbd */
{"PNP0300"},
{"PNP0301"},
{"PNP0302"},
{"PNP0303"},
{"PNP0304"},
{"PNP0305"},
{"PNP0306"},
{"PNP0309"},
{"PNP030a"},
{"PNP030b"},
{"PNP0320"},
{"PNP0343"},
{"PNP0344"},
{"PNP0345"},
{"CPQA0D7"},
/* i8042 aux */
{"AUI0200"},
{"FJC6000"},
{"FJC6001"},
{"PNP0f03"},
{"PNP0f0b"},
{"PNP0f0e"},
{"PNP0f12"},
{"PNP0f13"},
{"PNP0f19"},
{"PNP0f1c"},
{"SYN0801"},
/* fcpnp */
{"AVM0900"},
/* radio-cadet */
{"MSM0c24"}, /* ADS Cadet AM/FM Radio Card */
/* radio-gemtek */
{"ADS7183"}, /* AOpen FX-3D/Pro Radio */
/* radio-sf16fmr2 */
{"MFRad13"}, /* tuner subdevice of SF16-FMD2 */
/* ene_ir */
{"ENE0100"},
{"ENE0200"},
{"ENE0201"},
{"ENE0202"},
/* fintek-cir */
{"FIT0002"}, /* CIR */
/* ite-cir */
{"ITE8704"}, /* Default model */
{"ITE8713"}, /* CIR found in EEEBox 1501U */
{"ITE8708"}, /* Bridged IT8512 */
{"ITE8709"}, /* SRAM-Bridged IT8512 */
/* nuvoton-cir */
{"WEC0530"}, /* CIR */
{"NTN0530"}, /* CIR for new chip's pnp id */
/* Winbond CIR */
{"WEC1022"},
/* wbsd */
{"WEC0517"},
{"WEC0518"},
/* Winbond CIR */
{"TCM5090"}, /* 3Com Etherlink III (TP) */
{"TCM5091"}, /* 3Com Etherlink III */
{"TCM5094"}, /* 3Com Etherlink III (combo) */
{"TCM5095"}, /* 3Com Etherlink III (TPO) */
{"TCM5098"}, /* 3Com Etherlink III (TPC) */
{"PNP80f7"}, /* 3Com Etherlink III compatible */
{"PNP80f8"}, /* 3Com Etherlink III compatible */
/* nsc-ircc */
{"NSC6001"},
{"HWPC224"},
{"IBM0071"},
/* smsc-ircc2 */
{"SMCf010"},
/* sb1000 */
{"GIC1000"},
/* parport_pc */
{"PNP0400"}, /* Standard LPT Printer Port */
{"PNP0401"}, /* ECP Printer Port */
/* apple-gmux */
{"APP000B"},
/* system */
{"PNP0c02"}, /* General ID for reserving resources */
{"PNP0c01"}, /* memory controller */
/* rtc_cmos */
{"PNP0b00"},
{"PNP0b01"},
{"PNP0b02"},
/* c6xdigio */
{"PNP0400"}, /* Standard LPT Printer Port */
{"PNP0401"}, /* ECP Printer Port */
/* ni_atmio.c */
{"NIC1900"},
{"NIC2400"},
{"NIC2500"},
{"NIC2600"},
{"NIC2700"},
/* serial */
{"AAC000F"}, /* Archtek America Corp. Archtek SmartLink Modem 3334BT Plug & Play */
{"ADC0001"}, /* Anchor Datacomm BV. SXPro 144 External Data Fax Modem Plug & Play */
{"ADC0002"}, /* SXPro 288 External Data Fax Modem Plug & Play */
{"AEI0250"}, /* PROLiNK 1456VH ISA PnP K56flex Fax Modem */
{"AEI1240"}, /* Actiontec ISA PNP 56K X2 Fax Modem */
{"AKY1021"}, /* Rockwell 56K ACF II Fax+Data+Voice Modem */
{"ALI5123"}, /* ALi Fast Infrared Controller */
{"AZT4001"}, /* AZT3005 PnP SOUND DEVICE */
{"BDP3336"}, /* Best Data Products Inc. Smart One 336F PnP Modem */
{"BRI0A49"}, /* Boca Complete Ofc Communicator 14.4 Data-FAX */
{"BRI1400"}, /* Boca Research 33,600 ACF Modem */
{"BRI3400"}, /* Boca 33.6 Kbps Internal FD34FSVD */
{"BRI0A49"}, /* Boca 33.6 Kbps Internal FD34FSVD */
{"BDP3336"}, /* Best Data Products Inc. Smart One 336F PnP Modem */
{"CPI4050"}, /* Computer Peripherals Inc. EuroViVa CommCenter-33.6 SP PnP */
{"CTL3001"}, /* Creative Labs Phone Blaster 28.8 DSVD PnP Voice */
{"CTL3011"}, /* Creative Labs Modem Blaster 28.8 DSVD PnP Voice */
{"DAV0336"}, /* Davicom ISA 33.6K Modem */
{"DMB1032"}, /* Creative Modem Blaster Flash56 DI5601-1 */
{"DMB2001"}, /* Creative Modem Blaster V.90 DI5660 */
{"ETT0002"}, /* E-Tech CyberBULLET PC56RVP */
{"FUJ0202"}, /* Fujitsu 33600 PnP-I2 R Plug & Play */
{"FUJ0205"}, /* Fujitsu FMV-FX431 Plug & Play */
{"FUJ0206"}, /* Fujitsu 33600 PnP-I4 R Plug & Play */
{"FUJ0209"}, /* Fujitsu Fax Voice 33600 PNP-I5 R Plug & Play */
{"GVC000F"}, /* Archtek SmartLink Modem 3334BT Plug & Play */
{"GVC0303"}, /* Archtek SmartLink Modem 3334BRV 33.6K Data Fax Voice */
{"HAY0001"}, /* Hayes Optima 288 V.34-V.FC + FAX + Voice Plug & Play */
{"HAY000C"}, /* Hayes Optima 336 V.34 + FAX + Voice PnP */
{"HAY000D"}, /* Hayes Optima 336B V.34 + FAX + Voice PnP */
{"HAY5670"}, /* Hayes Accura 56K Ext Fax Modem PnP */
{"HAY5674"}, /* Hayes Accura 56K Ext Fax Modem PnP */
{"HAY5675"}, /* Hayes Accura 56K Fax Modem PnP */
{"HAYF000"}, /* Hayes 288, V.34 + FAX */
{"HAYF001"}, /* Hayes Optima 288 V.34 + FAX + Voice, Plug & Play */
{"IBM0033"}, /* IBM Thinkpad 701 Internal Modem Voice */
{"PNP4972"}, /* Intermec CV60 touchscreen port */
{"IXDC801"}, /* Intertex 28k8 33k6 Voice EXT PnP */
{"IXDC901"}, /* Intertex 33k6 56k Voice EXT PnP */
{"IXDD801"}, /* Intertex 28k8 33k6 Voice SP EXT PnP */
{"IXDD901"}, /* Intertex 33k6 56k Voice SP EXT PnP */
{"IXDF401"}, /* Intertex 28k8 33k6 Voice SP INT PnP */
{"IXDF801"}, /* Intertex 28k8 33k6 Voice SP EXT PnP */
{"IXDF901"}, /* Intertex 33k6 56k Voice SP EXT PnP */
{"KOR4522"}, /* KORTEX 28800 Externe PnP */
{"KORF661"}, /* KXPro 33.6 Vocal ASVD PnP */
{"LAS4040"}, /* LASAT Internet 33600 PnP */
{"LAS4540"}, /* Lasat Safire 560 PnP */
{"LAS5440"}, /* Lasat Safire 336 PnP */
{"MNP0281"}, /* Microcom TravelPorte FAST V.34 Plug & Play */
{"MNP0336"}, /* Microcom DeskPorte V.34 FAST or FAST+ Plug & Play */
{"MNP0339"}, /* Microcom DeskPorte FAST EP 28.8 Plug & Play */
{"MNP0342"}, /* Microcom DeskPorte 28.8P Plug & Play */
{"MNP0500"}, /* Microcom DeskPorte FAST ES 28.8 Plug & Play */
{"MNP0501"}, /* Microcom DeskPorte FAST ES 28.8 Plug & Play */
{"MNP0502"}, /* Microcom DeskPorte 28.8S Internal Plug & Play */
{"MOT1105"}, /* Motorola BitSURFR Plug & Play */
{"MOT1111"}, /* Motorola TA210 Plug & Play */
{"MOT1114"}, /* Motorola HMTA 200 (ISDN) Plug & Play */
{"MOT1115"}, /* Motorola BitSURFR Plug & Play */
{"MOT1190"}, /* Motorola Lifestyle 28.8 Internal */
{"MOT1501"}, /* Motorola V.3400 Plug & Play */
{"MOT1502"}, /* Motorola Lifestyle 28.8 V.34 Plug & Play */
{"MOT1505"}, /* Motorola Power 28.8 V.34 Plug & Play */
{"MOT1509"}, /* Motorola ModemSURFR External 28.8 Plug & Play */
{"MOT150A"}, /* Motorola Premier 33.6 Desktop Plug & Play */
{"MOT150F"}, /* Motorola VoiceSURFR 56K External PnP */
{"MOT1510"}, /* Motorola ModemSURFR 56K External PnP */
{"MOT1550"}, /* Motorola ModemSURFR 56K Internal PnP */
{"MOT1560"}, /* Motorola ModemSURFR Internal 28.8 Plug & Play */
{"MOT1580"}, /* Motorola Premier 33.6 Internal Plug & Play */
{"MOT15B0"}, /* Motorola OnlineSURFR 28.8 Internal Plug & Play */
{"MOT15F0"}, /* Motorola VoiceSURFR 56K Internal PnP */
{"MVX00A1"}, /* Deskline K56 Phone System PnP */
{"MVX00F2"}, /* PC Rider K56 Phone System PnP */
{"nEC8241"}, /* NEC 98NOTE SPEAKER PHONE FAX MODEM(33600bps) */
{"PMC2430"}, /* Pace 56 Voice Internal Plug & Play Modem */
{"PNP0500"}, /* Generic standard PC COM port */
{"PNP0501"}, /* Generic 16550A-compatible COM port */
{"PNPC000"}, /* Compaq 14400 Modem */
{"PNPC001"}, /* Compaq 2400/9600 Modem */
{"PNPC031"}, /* Dial-Up Networking Serial Cable between 2 PCs */
{"PNPC032"}, /* Dial-Up Networking Parallel Cable between 2 PCs */
{"PNPC100"}, /* Standard 9600 bps Modem */
{"PNPC101"}, /* Standard 14400 bps Modem */
{"PNPC102"}, /* Standard 28800 bps Modem */
{"PNPC103"}, /* Standard Modem */
{"PNPC104"}, /* Standard 9600 bps Modem */
{"PNPC105"}, /* Standard 14400 bps Modem */
{"PNPC106"}, /* Standard 28800 bps Modem */
{"PNPC107"}, /* Standard Modem */
{"PNPC108"}, /* Standard 9600 bps Modem */
{"PNPC109"}, /* Standard 14400 bps Modem */
{"PNPC10A"}, /* Standard 28800 bps Modem */
{"PNPC10B"}, /* Standard Modem */
{"PNPC10C"}, /* Standard 9600 bps Modem */
{"PNPC10D"}, /* Standard 14400 bps Modem */
{"PNPC10E"}, /* Standard 28800 bps Modem */
{"PNPC10F"}, /* Standard Modem */
{"PNP2000"}, /* Standard PCMCIA Card Modem */
{"ROK0030"}, /* Rockwell 33.6 DPF Internal PnP, Modular Technology 33.6 Internal PnP */
{"ROK0100"}, /* KORTEX 14400 Externe PnP */
{"ROK4120"}, /* Rockwell 28.8 */
{"ROK4920"}, /* Viking 28.8 INTERNAL Fax+Data+Voice PnP */
{"RSS00A0"}, /* Rockwell 33.6 DPF External PnP, BT Prologue 33.6 External PnP, Modular Technology 33.6 External PnP */
{"RSS0262"}, /* Viking 56K FAX INT */
{"RSS0250"}, /* K56 par,VV,Voice,Speakphone,AudioSpan,PnP */
{"SUP1310"}, /* SupraExpress 28.8 Data/Fax PnP modem */
{"SUP1381"}, /* SupraExpress 336i PnP Voice Modem */
{"SUP1421"}, /* SupraExpress 33.6 Data/Fax PnP modem */
{"SUP1590"}, /* SupraExpress 33.6 Data/Fax PnP modem */
{"SUP1620"}, /* SupraExpress 336i Sp ASVD */
{"SUP1760"}, /* SupraExpress 33.6 Data/Fax PnP modem */
{"SUP2171"}, /* SupraExpress 56i Sp Intl */
{"TEX0011"}, /* Phoebe Micro 33.6 Data Fax 1433VQH Plug & Play */
{"UAC000F"}, /* Archtek SmartLink Modem 3334BT Plug & Play */
{"USR0000"}, /* 3Com Corp. Gateway Telepath IIvi 33.6 */
{"USR0002"}, /* U.S. Robotics Sporster 33.6K Fax INT PnP */
{"USR0004"}, /* Sportster Vi 14.4 PnP FAX Voicemail */
{"USR0006"}, /* U.S. Robotics 33.6K Voice INT PnP */
{"USR0007"}, /* U.S. Robotics 33.6K Voice EXT PnP */
{"USR0009"}, /* U.S. Robotics Courier V.Everything INT PnP */
{"USR2002"}, /* U.S. Robotics 33.6K Voice INT PnP */
{"USR2070"}, /* U.S. Robotics 56K Voice INT PnP */
{"USR2080"}, /* U.S. Robotics 56K Voice EXT PnP */
{"USR3031"}, /* U.S. Robotics 56K FAX INT */
{"USR3050"}, /* U.S. Robotics 56K FAX INT */
{"USR3070"}, /* U.S. Robotics 56K Voice INT PnP */
{"USR3080"}, /* U.S. Robotics 56K Voice EXT PnP */
{"USR3090"}, /* U.S. Robotics 56K Voice INT PnP */
{"USR9100"}, /* U.S. Robotics 56K Message */
{"USR9160"}, /* U.S. Robotics 56K FAX EXT PnP */
{"USR9170"}, /* U.S. Robotics 56K FAX INT PnP */
{"USR9180"}, /* U.S. Robotics 56K Voice EXT PnP */
{"USR9190"}, /* U.S. Robotics 56K Voice INT PnP */
{"WACFXXX"}, /* Wacom tablets */
{"FPI2002"}, /* Compaq touchscreen */
{"FUJ02B2"}, /* Fujitsu Stylistic touchscreens */
{"FUJ02B3"},
{"FUJ02B4"}, /* Fujitsu Stylistic LT touchscreens */
{"FUJ02B6"}, /* Passive Fujitsu Stylistic touchscreens */
{"FUJ02B7"},
{"FUJ02B8"},
{"FUJ02B9"},
{"FUJ02BC"},
{"FUJ02E5"}, /* Fujitsu Wacom Tablet PC device */
{"FUJ02E6"}, /* Fujitsu P-series tablet PC device */
{"FUJ02E7"}, /* Fujitsu Wacom 2FGT Tablet PC device */
{"FUJ02E9"}, /* Fujitsu Wacom 1FGT Tablet PC device */
{"LTS0001"}, /* LG C1 EXPRESS DUAL (C1-PB11A3) touch screen (actually a FUJ02E6 in disguise) */
{"WCI0003"}, /* Rockwell's (PORALiNK) 33600 INT PNP */
{"WEC1022"}, /* Winbond CIR port, should not be probed. We should keep track of it to prevent the legacy serial driver from probing it */
/* scl200wdt */
{"NSC0800"}, /* National Semiconductor PC87307/PC97307 watchdog component */
/* mpu401 */
{"PNPb006"},
/* cs423x-pnpbios */
{"CSC0100"},
{"CSC0103"},
{"CSC0110"},
{"CSC0000"},
{"GIM0100"}, /* Guillemot Turtlebeach something appears to be cs4232 compatible */
/* es18xx-pnpbios */
{"ESS1869"},
{"ESS1879"},
/* snd-opl3sa2-pnpbios */
{"YMH0021"},
{"NMX2210"}, /* Gateway Solo 2500 */
{""},
};
static bool matching_id(const char *idstr, const char *list_id)
{
int i;
if (strlen(idstr) != strlen(list_id))
return false;
if (memcmp(idstr, list_id, 3))
return false;
for (i = 3; i < 7; i++) {
char c = toupper(idstr[i]);
if (!isxdigit(c)
|| (list_id[i] != 'X' && c != toupper(list_id[i])))
return false;
}
return true;
}
static bool acpi_pnp_match(const char *idstr, const struct acpi_device_id **matchid)
{
const struct acpi_device_id *devid;
for (devid = acpi_pnp_device_ids; devid->id[0]; devid++)
if (matching_id(idstr, (char *)devid->id)) {
if (matchid)
*matchid = devid;
return true;
}
return false;
}
static int acpi_pnp_attach(struct acpi_device *adev,
const struct acpi_device_id *id)
{
return 1;
}
static struct acpi_scan_handler acpi_pnp_handler = {
.ids = acpi_pnp_device_ids,
.match = acpi_pnp_match,
.attach = acpi_pnp_attach,
};
/*
* For CMOS RTC devices, the PNP ACPI scan handler does not work, because
* there is a CMOS RTC ACPI scan handler installed already, so we need to
* check those devices and enumerate them to the PNP bus directly.
*/
static int is_cmos_rtc_device(struct acpi_device *adev)
{
static const struct acpi_device_id ids[] = {
{ "PNP0B00" },
{ "PNP0B01" },
{ "PNP0B02" },
{""},
};
return !acpi_match_device_ids(adev, ids);
}
bool acpi_is_pnp_device(struct acpi_device *adev)
{
return adev->handler == &acpi_pnp_handler || is_cmos_rtc_device(adev);
}
EXPORT_SYMBOL_GPL(acpi_is_pnp_device);
void __init acpi_pnp_init(void)
{
acpi_scan_add_handler(&acpi_pnp_handler);
}
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