From: Nick Dyer <nick.dyer@itdev.co.uk>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Daniel Kurtz <djkurtz@chromium.org>,
Henrik Rydberg <rydberg@euromail.se>,
Joonyoung Shim <jy0922.shim@samsung.com>,
Alan Bowens <Alan.Bowens@atmel.com>,
linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
Peter Meerwald <pmeerw@pmeerw.net>,
Benson Leung <bleung@chromium.org>,
Olof Johansson <olofj@chromium.org>,
Nick Dyer <nick.dyer@itdev.co.uk>
Subject: [PATCH 06/51] Input: atmel_mxt_ts - wait for CHG assert in mxt_check_bootloader
Date: Thu, 27 Jun 2013 13:48:41 +0100 [thread overview]
Message-ID: <1372337366-9286-7-git-send-email-nick.dyer@itdev.co.uk> (raw)
In-Reply-To: <1372337366-9286-1-git-send-email-nick.dyer@itdev.co.uk>
From: Benson Leung <bleung@chromium.org>
The driver should not immediately read bootloader status when
in Application Update Mode. The CHG line will assert when the device
has made a state transition and is ready to report a new status
via i2c.
This change adds a wait for completion in mxt_check_bootloader,
and changes the mxt_interrupt handler to signal the completion.
Signed-off-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
---
drivers/input/touchscreen/atmel_mxt_ts.c | 102 ++++++++++++++++++++++++------
1 file changed, 81 insertions(+), 21 deletions(-)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 7de3b47..3f75e8c 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -15,6 +15,7 @@
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/i2c.h>
@@ -247,16 +248,19 @@ struct mxt_data {
const struct mxt_platform_data *pdata;
struct mxt_object *object_table;
struct mxt_info info;
-
unsigned int irq;
unsigned int max_x;
unsigned int max_y;
+ bool in_bootloader;
/* Cached parameters from object table */
u8 T6_reportid;
u8 T9_reportid_min;
u8 T9_reportid_max;
u8 T19_reportid;
+
+ /* for fw update in bootloader */
+ struct completion bl_completion;
};
static inline size_t mxt_obj_size(const struct mxt_object *obj)
@@ -340,12 +344,51 @@ static void mxt_dump_message(struct device *dev,
message->reportid, 7, message->message);
}
-static int mxt_check_bootloader(struct i2c_client *client,
- unsigned int state)
+static int mxt_wait_for_chg(struct mxt_data *data, unsigned int timeout_ms)
+{
+ struct device *dev = &data->client->dev;
+ struct completion *comp = &data->bl_completion;
+ unsigned long timeout = msecs_to_jiffies(timeout_ms);
+ long ret;
+
+ ret = wait_for_completion_interruptible_timeout(comp, timeout);
+ if (ret < 0) {
+ dev_err(dev, "Wait for completion interrupted.\n");
+ return -EINTR;
+ } else if (ret == 0) {
+ dev_err(dev, "Wait for completion timed out.\n");
+ return -ETIMEDOUT;
+ }
+ return 0;
+}
+
+static int mxt_check_bootloader(struct mxt_data *data, unsigned int state)
{
+ struct i2c_client *client = data->client;
u8 val;
+ int ret;
recheck:
+ if (state != MXT_WAITING_BOOTLOAD_CMD) {
+ /*
+ * In application update mode, the interrupt
+ * line signals state transitions. We must wait for the
+ * CHG assertion before reading the status byte.
+ * Once the status byte has been read, the line is deasserted.
+ */
+ ret = mxt_wait_for_chg(data, 300);
+ if (ret) {
+ /*
+ * TODO: handle -EINTR better by terminating fw update
+ * process before returning to userspace by writing
+ * length 0x000 to device (iff we are in
+ * WAITING_FRAME_DATA state).
+ */
+ dev_err(&client->dev, "Update wait error %d\n", ret);
+ return ret;
+ }
+ }
+
if (i2c_master_recv(client, &val, 1) != 1) {
dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
return -EIO;
@@ -591,9 +634,8 @@ static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg)
return (id >= data->T9_reportid_min && id <= data->T9_reportid_max);
}
-static irqreturn_t mxt_interrupt(int irq, void *dev_id)
+static irqreturn_t mxt_process_messages_until_invalid(struct mxt_data *data)
{
- struct mxt_data *data = dev_id;
struct mxt_message message;
const u8 *payload = &message.message[0];
struct device *dev = &data->client->dev;
@@ -633,6 +675,19 @@ static irqreturn_t mxt_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
+static irqreturn_t mxt_interrupt(int irq, void *dev_id)
+{
+ struct mxt_data *data = dev_id;
+
+ if (data->in_bootloader) {
+ /* bootloader state transition completion */
+ complete(&data->bl_completion);
+ return IRQ_HANDLED;
+ }
+
+ return mxt_process_messages_until_invalid(data);
+}
+
static int mxt_check_reg_init(struct mxt_data *data)
{
const struct mxt_platform_data *pdata = data->pdata;
@@ -948,6 +1003,8 @@ static int mxt_load_fw(struct device *dev, const char *fn)
}
/* Change to the bootloader mode */
+ data->in_bootloader = true;
+
mxt_write_object(data, MXT_GEN_COMMAND_T6,
MXT_COMMAND_RESET, MXT_BOOT_VALUE);
msleep(MXT_RESET_TIME);
@@ -958,18 +1015,19 @@ static int mxt_load_fw(struct device *dev, const char *fn)
else
client->addr = MXT_BOOT_HIGH;
- ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
+ INIT_COMPLETION(data->bl_completion);
+
+ ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD);
if (ret)
- goto out;
+ goto disable_irq;
/* Unlock bootloader */
mxt_unlock_bootloader(client);
while (pos < fw->size) {
- ret = mxt_check_bootloader(client,
- MXT_WAITING_FRAME_DATA);
+ ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA);
if (ret)
- goto out;
+ goto disable_irq;
frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
@@ -981,17 +1039,19 @@ static int mxt_load_fw(struct device *dev, const char *fn)
/* Write one frame to device */
mxt_fw_write(client, fw->data + pos, frame_size);
- ret = mxt_check_bootloader(client,
- MXT_FRAME_CRC_PASS);
+ ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS);
if (ret)
- goto out;
+ goto disable_irq;
pos += frame_size;
dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
}
-out:
+ data->in_bootloader = false;
+
+disable_irq:
+ disable_irq(data->irq);
release_firmware(fw);
/* Change to slave address of application */
@@ -1010,8 +1070,6 @@ static ssize_t mxt_update_fw_store(struct device *dev,
struct mxt_data *data = dev_get_drvdata(dev);
int error;
- disable_irq(data->irq);
-
error = mxt_load_fw(dev, MXT_FW_NAME);
if (error) {
dev_err(dev, "The firmware update failed(%d)\n", error);
@@ -1025,13 +1083,13 @@ static ssize_t mxt_update_fw_store(struct device *dev,
mxt_free_object_table(data);
mxt_initialize(data);
- }
- enable_irq(data->irq);
+ enable_irq(data->irq);
- error = mxt_make_highchg(data);
- if (error)
- return error;
+ error = mxt_make_highchg(data);
+ if (error)
+ return error;
+ }
return count;
}
@@ -1121,6 +1179,8 @@ static int mxt_probe(struct i2c_client *client,
data->pdata = pdata;
data->irq = client->irq;
+ init_completion(&data->bl_completion);
+
mxt_calc_resolution(data);
error = mxt_initialize(data);
--
1.7.10.4
next prev parent reply other threads:[~2013-06-27 13:08 UTC|newest]
Thread overview: 87+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-27 12:48 Atmel updates to atmel_mxt_ts touch controller driver - v6 Nick Dyer
2013-06-27 12:48 ` [PATCH 01/51] Input: atmel_mxt_ts - Remove unnecessary platform data Nick Dyer
2013-06-27 12:48 ` [PATCH 02/51] Input: atmel_mxt_ts - Improve T19 GPIO keys handling Nick Dyer
2013-07-18 17:11 ` rydberg
2013-06-27 12:48 ` [PATCH 03/51] Input: atmel_mxt_ts - Return IRQ_NONE when interrupt handler fails Nick Dyer
2013-06-27 12:48 ` [PATCH 04/51] Input: atmel_mxt_ts - define helper functions for size and instances Nick Dyer
2013-06-27 12:48 ` [PATCH 05/51] Input: atmel_mxt_ts - Select FW_LOADER for firmware code Nick Dyer
2013-06-27 12:48 ` Nick Dyer [this message]
2013-06-27 12:48 ` [PATCH 07/51] Input: atmel_mxt_ts - wait for CHG after bootloader resets Nick Dyer
2013-06-27 12:48 ` [PATCH 08/51] Input: atmel_mxt_ts - Initialise IRQ before probing Nick Dyer
2013-07-18 17:13 ` rydberg
2013-06-27 12:48 ` [PATCH 09/51] Input: atmel_mxt_ts - Make wait-after-reset period compatible with all chips Nick Dyer
2013-06-27 12:48 ` [PATCH 10/51] Input: atmel_mxt_ts - Improve error reporting and debug Nick Dyer
2013-06-27 12:48 ` [PATCH 11/51] Input: atmel_mxt_ts - Implement CRC check for configuration data Nick Dyer
2013-09-18 16:59 ` [11/51] " Martin Fuzzey
2013-06-27 12:48 ` [PATCH 12/51] Input: atmel_mxt_ts - Download device config using firmware loader Nick Dyer
2013-09-18 17:08 ` [12/51] " Martin Fuzzey
2013-06-27 12:48 ` [PATCH 13/51] Input: atmel_mxt_ts - Calculate and check CRC in config file Nick Dyer
2013-06-27 12:48 ` [PATCH 14/51] Input: atmel_mxt_ts - Add additional bootloader addresses Nick Dyer
2013-06-27 12:48 ` [PATCH 15/51] Input: atmel_mxt_ts - Read and report bootloader version Nick Dyer
2013-06-27 12:48 ` [PATCH 16/51] Input: atmel_mxt_ts - Implement bootloader frame retries Nick Dyer
2013-06-27 12:48 ` [PATCH 17/51] Input: atmel_mxt_ts - Improve bootloader progress output Nick Dyer
2013-06-27 12:48 ` [PATCH 18/51] Input: atmel_mxt_ts - Add check for incorrect firmware file format Nick Dyer
2013-06-27 12:48 ` [PATCH 19/51] Input: atmel_mxt_ts - Read screen config from chip Nick Dyer
2013-06-27 12:48 ` [PATCH 20/51] Input: atmel_mxt_ts - Set default irqflags when there is no pdata Nick Dyer
2013-07-18 17:17 ` rydberg
2013-09-16 2:25 ` Dmitry Torokhov
2014-05-22 14:29 ` Nick Dyer
2014-05-23 16:37 ` Yufeng Shen
2014-05-24 12:41 ` Nick Dyer
2014-05-26 18:17 ` Yufeng Shen
2014-05-26 5:23 ` Dmitry Torokhov
2014-05-26 18:13 ` Yufeng Shen
2013-06-27 12:48 ` [PATCH 21/51] Input: atmel_mxt_ts - Use deep sleep mode when stopped Nick Dyer
2013-06-27 12:48 ` [PATCH 22/51] Input: atmel_mxt_ts - Add shutdown function Nick Dyer
2013-07-07 5:29 ` Dmitry Torokhov
2013-07-08 9:56 ` Nick Dyer
2013-07-10 16:55 ` Dmitry Torokhov
2013-07-10 18:32 ` Nick Dyer
2013-06-27 12:48 ` [PATCH 23/51] Input: atmel_mxt_ts - Rename pressure to amplitude to match spec Nick Dyer
2013-06-27 12:48 ` [PATCH 24/51] Input: atmel_mxt_ts - Rename touchscreen defines to include T9 Nick Dyer
2013-06-27 12:49 ` [PATCH 25/51] Input: atmel_mxt_ts - Handle multiple input reports in one message Nick Dyer
2013-07-18 17:18 ` rydberg
2013-06-27 12:49 ` [PATCH 26/51] Input: atmel_mxt_ts - Move input device init into separate function Nick Dyer
2013-07-07 5:34 ` Dmitry Torokhov
2013-07-08 9:41 ` Nick Dyer
2013-07-10 16:53 ` Dmitry Torokhov
2013-07-18 17:20 ` rydberg
2013-06-27 12:49 ` [PATCH 27/51] Input: atmel_mxt_ts - Handle APP_CRC_FAIL on startup Nick Dyer
2013-06-27 12:49 ` [PATCH 28/51] Input: atmel_mxt_ts - Handle bootloader previously unlocked Nick Dyer
2013-06-27 12:49 ` [PATCH 29/51] Input: atmel_mxt_ts - Add bootloader addresses for new chips Nick Dyer
2013-06-27 12:49 ` [PATCH 30/51] Input: atmel_mxt_ts - Recover from bootloader on probe Nick Dyer
2013-06-27 12:49 ` [PATCH 31/51] Input: atmel_mxt_ts - Add support for dynamic message size Nick Dyer
2013-06-27 12:49 ` [PATCH 32/51] Input: atmel_mxt_ts - Decode T6 status messages Nick Dyer
2013-06-27 12:49 ` [PATCH 33/51] Input: atmel_mxt_ts - Split message handler into separate functions Nick Dyer
2013-06-27 12:49 ` [PATCH 34/51] Input: atmel_mxt_ts - Implement T44 message handling Nick Dyer
2013-06-27 12:49 ` [PATCH 35/51] Input: atmel_mxt_ts - Output status from T48 Noise Supression Nick Dyer
2013-06-27 12:49 ` [PATCH 36/51] Input: atmel_mxt_ts - Output status from T42 Touch Suppression Nick Dyer
2013-06-27 12:49 ` [PATCH 37/51] Input: atmel_mxt_ts - Implement vector/orientation support Nick Dyer
2013-07-18 17:20 ` rydberg
2013-08-15 16:18 ` Nick Dyer
2013-06-27 12:49 ` [PATCH 38/51] Input: atmel_mxt_ts - implement I2C retries Nick Dyer
2013-06-27 12:49 ` [PATCH 39/51] Input: atmel_mxt_ts - Implement T63 Active Stylus support Nick Dyer
2013-07-18 17:21 ` rydberg
2013-06-27 12:49 ` [PATCH 40/51] Input: atmel_mxt_ts - Implement support for T15 Key Array Nick Dyer
2013-06-27 12:49 ` [PATCH 41/51] Input: atmel_mxt_ts - Remove unused defines Nick Dyer
2013-06-27 12:49 ` [PATCH 42/51] Input: atmel_mxt_ts - Verify Information Block checksum on probe Nick Dyer
2013-06-27 12:49 ` [PATCH 43/51] Input: atmel_mxt_ts - Use T18 RETRIGEN to handle IRQF_TRIGGER_LOW Nick Dyer
2013-06-27 12:49 ` [PATCH 44/51] Input: atmel_mxt_ts - Handle reports from T47 Stylus object Nick Dyer
2013-07-18 17:23 ` rydberg
2013-06-27 12:49 ` [PATCH 45/51] Input: atmel_mxt_ts - Release touch state during suspend Nick Dyer
2013-07-18 17:29 ` rydberg
2013-08-15 15:52 ` Nick Dyer
2013-06-27 12:49 ` [PATCH 46/51] Input: atmel_mxt_ts - Initialize power config before and after downloading cfg Nick Dyer
2013-06-27 12:49 ` [PATCH 47/51] Input: atmel_mxt_ts - Add regulator control support Nick Dyer
2013-06-27 12:49 ` [PATCH 48/51] Input: atmel_mxt_ts - Implement support for T100 touch object Nick Dyer
2013-06-27 12:49 ` [PATCH 49/51] Input: atmel_mxt_ts - Allow specification of firmware file name Nick Dyer
2013-06-27 12:49 ` [PATCH 50/51] Input: atmel_mxt_ts - Handle cfg filename via pdata/sysfs Nick Dyer
2013-06-27 12:49 ` [PATCH 51/51] Input: atmel_mxt_ts - Only use first T9 instance Nick Dyer
2013-06-27 15:17 ` Atmel updates to atmel_mxt_ts touch controller driver - v6 Nick Dyer
2013-07-18 19:47 ` rydberg
2013-08-15 15:55 ` Nick Dyer
2013-08-15 16:07 ` Dmitry Torokhov
2013-08-19 14:24 ` Nick Dyer
2013-09-10 13:58 ` Nick Dyer
[not found] ` <CAPDwgkOo7FYLujk16kJM=BqmXRKvZ2S_LOYURW0cXT5t=cmi6w@mail.gmail.com>
2014-01-15 10:44 ` Nick Dyer
[not found] ` <CAPDwgkOsP4K7r0-Mo-U52X9knRbGgbuD4dGptmj3x-LMTN75BA@mail.gmail.com>
2014-01-17 20:01 ` Nick Dyer
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