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From: "Philippe Mathieu-Daudé" <f4bug@amsat.org>
To: qemu-devel@nongnu.org
Cc: "Corey Minyard" <cminyard@mvista.com>,
	"Philippe Mathieu-Daudé" <f4bug@amsat.org>,
	"Signed-off-by : Frederic Konrad" <frederic.konrad@adacore.com>,
	qemu-arm@nongnu.org, qemu-ppc@nongnu.org
Subject: [PATCH v3 07/13] hw/misc/auxbus: Fix MOT/classic I2C mode
Date: Wed, 16 Jun 2021 18:14:12 +0200	[thread overview]
Message-ID: <20210616161418.2514095-8-f4bug@amsat.org> (raw)
In-Reply-To: <20210616161418.2514095-1-f4bug@amsat.org>

Since its introduction in commit 6fc7f77fd2 i2c_start_transfer()
uses incorrectly the direction of the transfer (the last argument
is called 'is_recv'). Fix by inverting the argument, we now have
is_recv = !is_write.

Fixes: 6fc7f77fd2 ("introduce aux-bus")
Reported-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/misc/auxbus.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/hw/misc/auxbus.c b/hw/misc/auxbus.c
index 6c099ae2a2d..148b070ce4a 100644
--- a/hw/misc/auxbus.c
+++ b/hw/misc/auxbus.c
@@ -139,7 +139,7 @@ AUXReply aux_request(AUXBus *bus, AUXCommand cmd, uint32_t address,
             i2c_end_transfer(i2c_bus);
         }
 
-        if (i2c_start_transfer(i2c_bus, address, is_write)) {
+        if (i2c_start_transfer(i2c_bus, address, !is_write)) {
             ret = AUX_I2C_NACK;
             break;
         }
@@ -170,7 +170,7 @@ AUXReply aux_request(AUXBus *bus, AUXCommand cmd, uint32_t address,
             /*
              * No transactions started..
              */
-            if (i2c_start_transfer(i2c_bus, address, is_write)) {
+            if (i2c_start_transfer(i2c_bus, address, !is_write)) {
                 break;
             }
         } else if ((address != bus->last_i2c_address) ||
@@ -179,7 +179,7 @@ AUXReply aux_request(AUXBus *bus, AUXCommand cmd, uint32_t address,
              * Transaction started but we need to restart..
              */
             i2c_end_transfer(i2c_bus);
-            if (i2c_start_transfer(i2c_bus, address, is_write)) {
+            if (i2c_start_transfer(i2c_bus, address, !is_write)) {
                 break;
             }
         }
-- 
2.31.1



  parent reply	other threads:[~2021-06-16 16:23 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-16 16:14 [PATCH v3 00/13] hw/i2c: Remove confusing i2c_send_recv() API Philippe Mathieu-Daudé
2021-06-16 16:14 ` [PATCH v3 01/13] hw/input/lm832x: Move lm832x_key_event() declaration to "lm832x.h" Philippe Mathieu-Daudé
2021-06-16 18:38   ` Richard Henderson
2021-06-16 19:23     ` Philippe Mathieu-Daudé
2021-06-16 16:14 ` [PATCH v3 02/13] hw/input/lm832x: Define TYPE_LM8323 in public header Philippe Mathieu-Daudé
2021-06-16 18:39   ` Richard Henderson
2021-06-16 16:14 ` [PATCH v3 03/13] hw/display/sm501: Simplify sm501_i2c_write() logic Philippe Mathieu-Daudé
2021-06-16 18:39   ` Richard Henderson
2021-06-16 16:14 ` [PATCH v3 04/13] hw/display/sm501: Replace i2c_send_recv() by i2c_recv() & i2c_send() Philippe Mathieu-Daudé
2021-06-16 18:40   ` Richard Henderson
2021-06-16 19:14   ` Corey Minyard
2021-06-16 16:14 ` [PATCH v3 05/13] hw/i2c/ppc4xx_i2c: Add reference to datasheet Philippe Mathieu-Daudé
2021-06-16 18:40   ` Richard Henderson
2021-06-16 16:14 ` [PATCH v3 06/13] hw/i2c/ppc4xx_i2c: Replace i2c_send_recv() by i2c_recv() & i2c_send() Philippe Mathieu-Daudé
2021-06-16 18:41   ` Richard Henderson
2021-06-16 19:16   ` Corey Minyard
2021-06-16 19:25     ` Philippe Mathieu-Daudé
2021-06-16 20:01       ` BALATON Zoltan
2021-06-16 20:28         ` Philippe Mathieu-Daudé
2021-06-16 23:09           ` BALATON Zoltan
2021-06-16 23:42             ` Corey Minyard
2021-06-17 23:49           ` BALATON Zoltan
2021-06-18  8:54             ` Philippe Mathieu-Daudé
2021-06-16 16:14 ` Philippe Mathieu-Daudé [this message]
2021-06-16 18:41   ` [PATCH v3 07/13] hw/misc/auxbus: Fix MOT/classic I2C mode Richard Henderson
2021-06-16 16:14 ` [PATCH v3 08/13] hw/misc/auxbus: Explode READ_I2C / WRITE_I2C_MOT cases Philippe Mathieu-Daudé
2021-06-16 18:41   ` Richard Henderson
2021-06-16 16:14 ` [PATCH v3 09/13] hw/misc/auxbus: Replace 'is_write' boolean by its value Philippe Mathieu-Daudé
2021-06-16 18:43   ` Richard Henderson
2021-06-16 16:14 ` [PATCH v3 10/13] hw/misc/auxbus: Replace i2c_send_recv() by i2c_recv() & i2c_send() Philippe Mathieu-Daudé
2021-06-16 18:46   ` Richard Henderson
2021-06-16 19:28     ` Philippe Mathieu-Daudé
2021-06-16 20:06       ` BALATON Zoltan
2021-06-16 16:14 ` [PATCH v3 11/13] hw/i2c: Remove confusing i2c_send_recv() Philippe Mathieu-Daudé
2021-06-16 18:47   ` Richard Henderson
2021-06-16 16:14 ` [PATCH v3 12/13] hw/i2c: Rename i2c_set_slave_address() -> i2c_slave_set_address() Philippe Mathieu-Daudé
2021-06-16 18:50   ` Richard Henderson
2021-06-16 16:14 ` [PATCH v3 13/13] hw/i2c: Make i2c_start_transfer() direction argument a boolean Philippe Mathieu-Daudé
2021-06-16 19:02   ` Richard Henderson
2021-06-16 19:28 ` [PATCH v3 00/13] hw/i2c: Remove confusing i2c_send_recv() API Corey Minyard

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