lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Wed, 29 Mar 2017 20:54:53 +0900
From:   Andi Shyti <andi.shyti@...sung.com>
To:     MyungJoo Ham <myungjoo.ham@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Jaewon Kim <jaewon02.kim@...sung.com>
Cc:     Seung-Woo Kim <sw0312.kim@...sung.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-kernel@...r.kernel.org, Andi Shyti <andi.shyti@...sung.com>,
        Andi Shyti <andi@...zian.org>
Subject: [PATCH 2/2] extcon: max77843: support USB accessories as external
 USB hosts

The ADC state defines the resistance that a USB device has in
order to distinguish between devices.

The external accessories (like the Gear VR) are defined as:

MAX77843_MUIC_ADC_RESERVED_ACC_1
MAX77843_MUIC_ADC_RESERVED_ACC_2
MAX77843_MUIC_ADC_RESERVED_ACC_3
MAX77843_MUIC_ADC_RESERVED_ACC_4
MAX77843_MUIC_ADC_RESERVED_ACC_5

and they should be set as such in the extcon driver.

Do not ignore interrupts generated by external accessories by
handling cables of the type from any of the above.

Do not handle any charging related action. This can be
misleading as also external devices might have some power and in
such cases the MUIC might consider them as power providers. In
this case check the value of the adc and if it corresponds to
one or the MAX77843_MUIC_ADC_RESERVED_ACC_*, return a no-action
value (MAX77843_MUIC_CHG_NONE).

Signed-off-by: Andi Shyti <andi.shyti@...sung.com>
---
 drivers/extcon/extcon-max77843.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/extcon/extcon-max77843.c b/drivers/extcon/extcon-max77843.c
index fcdabc4b4025..00795fe9ab60 100644
--- a/drivers/extcon/extcon-max77843.c
+++ b/drivers/extcon/extcon-max77843.c
@@ -271,6 +271,13 @@ static int max77843_muic_get_cable_type(struct max77843_muic_info *info,
 		} else {
 			*attached = true;
 			switch (adc) {
+			case MAX77843_MUIC_ADC_RESERVED_ACC_1:
+			case MAX77843_MUIC_ADC_RESERVED_ACC_2:
+			case MAX77843_MUIC_ADC_RESERVED_ACC_3:
+			case MAX77843_MUIC_ADC_RESERVED_ACC_4:
+			case MAX77843_MUIC_ADC_RESERVED_ACC_5:
+				info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
+				break;
 			case MAX77843_MUIC_ADC_GROUND:
 				info->prev_chg_type = MAX77843_MUIC_CHG_GND;
 				break;
@@ -403,6 +410,11 @@ static int max77843_muic_adc_handler(struct max77843_muic_info *info)
 
 	switch (cable_type) {
 	case MAX77843_MUIC_ADC_GROUND:
+	case MAX77843_MUIC_ADC_RESERVED_ACC_1:
+	case MAX77843_MUIC_ADC_RESERVED_ACC_2:
+	case MAX77843_MUIC_ADC_RESERVED_ACC_3:
+	case MAX77843_MUIC_ADC_RESERVED_ACC_4:
+	case MAX77843_MUIC_ADC_RESERVED_ACC_5:
 		ret = max77843_muic_adc_gnd_handler(info);
 		if (ret < 0)
 			return ret;
@@ -427,11 +439,6 @@ static int max77843_muic_adc_handler(struct max77843_muic_info *info)
 	case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON:
 	case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON:
 	case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON:
-	case MAX77843_MUIC_ADC_RESERVED_ACC_1:
-	case MAX77843_MUIC_ADC_RESERVED_ACC_2:
-	case MAX77843_MUIC_ADC_RESERVED_ACC_3:
-	case MAX77843_MUIC_ADC_RESERVED_ACC_4:
-	case MAX77843_MUIC_ADC_RESERVED_ACC_5:
 	case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2:
 	case MAX77843_MUIC_ADC_PHONE_POWERED_DEV:
 	case MAX77843_MUIC_ADC_TTY_CONVERTER:
-- 
2.11.0

Powered by blists - more mailing lists