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From: Jiada Wang <jiada_wang@mentor.com>
To: <jikos@kernel.org>, <benjamin.tissoires@redhat.com>,
	<rydberg@bitmath.org>, <dmitry.torokhov@gmail.com>,
	<nick@shmanahar.org>, <bsz@semihalf.com>
Cc: <linux-input@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<erosca@de.adit-jv.com>, <Andrew_Gabbasov@mentor.com>,
	<jiada_wang@mentor.com>
Subject: [PATCH v7 24/48] Input: atmel_mxt_ts - make bootloader interrupt driven
Date: Wed, 12 Feb 2020 00:41:54 -0800
Message-ID: <20200212084218.32344-25-jiada_wang@mentor.com> (raw)
In-Reply-To: <20200212084218.32344-1-jiada_wang@mentor.com>

From: Nick Dyer <nick.dyer@itdev.co.uk>

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
(cherry picked from ndyer/linux/for-upstream commit 67a3eea0cfc724c3c2a7410ac064f74227c7c6ef)
[gdavis: Resolve forward port conflicts due to applying upstream
	 commit 96a938aa214e ("Input: atmel_mxt_ts - remove platform
	 data support").]
Signed-off-by: George G. Davis <george_davis@mentor.com>
[jiada: Replace two use msecs_to_jiffies() instead of HZ,
	remove check of &data->flash->work
	don't poll to call mxt_check_bootloader() in mxt_check_bootloader()]
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
---
 drivers/input/touchscreen/atmel_mxt_ts.c | 127 ++++++++++-------------
 1 file changed, 57 insertions(+), 70 deletions(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 2164da9a160c..07601539ac27 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -27,6 +27,7 @@
 #include <linux/gpio/consumer.h>
 #include <asm/unaligned.h>
 #include <linux/regulator/consumer.h>
+#include <linux/workqueue.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-ioctl.h>
 #include <media/videobuf2-v4l2.h>
@@ -218,6 +219,7 @@ enum t100_type {
 #define MXT_REGULATOR_DELAY	150	/* msec */
 #define MXT_CHG_DELAY	        100	/* msec */
 #define MXT_POWERON_DELAY	150	/* msec */
+#define MXT_BOOTLOADER_WAIT	36E5	/* 1 minute */
 
 /* Command to unlock bootloader */
 #define MXT_UNLOCK_CMD_MSB	0xaa
@@ -299,6 +301,7 @@ struct mxt_fw_frame {
 
 /* Firmware update context */
 struct mxt_flash {
+	struct mxt_data *data;
 	const struct firmware *fw;
 	struct mxt_fw_frame *frame;
 	loff_t pos;
@@ -306,8 +309,8 @@ struct mxt_flash {
 	unsigned int count;
 	unsigned int retry;
 	u8 previous;
-	bool complete;
-	bool wait;
+	struct completion flash_completion;
+	struct delayed_work work;
 };
 
 /* Each client has this additional data */
@@ -356,6 +359,7 @@ struct mxt_data {
 	char *cfg_name;
 	const char *pcfg_name;
 	const char *input_name;
+	struct mxt_flash *flash;
 
 	/* Cached parameters from object table */
 	u16 T5_address;
@@ -600,35 +604,19 @@ static int mxt_write_firmware_frame(struct mxt_data *data, struct mxt_flash *f)
 				   f->frame_size);
 }
 
-static int mxt_check_bootloader(struct mxt_data *data, struct mxt_flash *f)
+static int mxt_check_bootloader(struct mxt_data *data)
 {
 	struct device *dev = &data->client->dev;
+	struct mxt_flash *f = data->flash;
 	u8 state;
 	int ret;
 
-	if (f->wait) {
-		/*
-		 * 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_completion(data, &data->chg_completion,
-					      MXT_FW_CHG_TIMEOUT);
-		if (ret) {
-			/*
-			 * TODO: handle -ERESTARTSYS 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_warn(dev, "Update wait error %d\n", ret);
-			return ret;
-		}
+	/* Handle interrupt after download/flash process */
+	if (f->pos >= f->fw->size) {
+		complete(&f->flash_completion);
+		return 0;
 	}
 
-	f->wait = false;
-
 	ret = mxt_bootloader_read(data, &state, 1);
 	if (ret)
 		return ret;
@@ -643,7 +631,6 @@ static int mxt_check_bootloader(struct mxt_data *data, struct mxt_flash *f)
 		ret = mxt_send_bootloader_cmd(data, true);
 		if (ret)
 			return ret;
-		f->wait = true;
 
 		break;
 
@@ -657,14 +644,11 @@ static int mxt_check_bootloader(struct mxt_data *data, struct mxt_flash *f)
 		if (ret)
 			return ret;
 
-		f->wait = true;
-
 		break;
 
 	case MXT_FRAME_CRC_CHECK:
 		if (f->previous != MXT_WAITING_FRAME_DATA)
 			goto unexpected;
-		f->wait = true;
 		break;
 
 	case MXT_FRAME_CRC_PASS:
@@ -675,16 +659,13 @@ static int mxt_check_bootloader(struct mxt_data *data, struct mxt_flash *f)
 		f->retry = 0;
 		f->pos += f->frame_size;
 		f->count++;
-		f->wait = true;
 
-		if (f->pos >= f->fw->size) {
-			f->complete = true;
+		if (f->pos >= f->fw->size)
 			dev_info(dev, "Sent %u frames, %zu bytes\n",
 				f->count, f->fw->size);
-		} else if (f->count % 50 == 0) {
+		else if (f->count % 50 == 0)
 			dev_dbg(dev, "Sent %u frames, %lld/%zu bytes\n",
 				f->count, f->pos, f->fw->size);
-		}
 
 		break;
 
@@ -697,7 +678,6 @@ static int mxt_check_bootloader(struct mxt_data *data, struct mxt_flash *f)
 		/* Back off by 20ms per retry */
 		dev_dbg(dev, "Bootloader frame CRC failure\n");
 		f->retry++;
-		f->wait = true;
 		msleep(f->retry * 20);
 		break;
 
@@ -1415,7 +1395,11 @@ static irqreturn_t mxt_interrupt(int irq, void *dev_id)
 
 	if (data->in_bootloader) {
 		complete(&data->chg_completion);
-		return IRQ_HANDLED;
+
+		if (data->flash)
+			cancel_delayed_work_sync(&data->flash->work);
+
+		return IRQ_RETVAL(mxt_check_bootloader(data));
 	}
 
 	if (!data->object_table)
@@ -3316,16 +3300,13 @@ static int mxt_enter_bootloader(struct mxt_data *data)
 		if (data->suspend_mode == MXT_SUSPEND_REGULATOR)
 			mxt_regulator_enable(data);
 
-		if (data->suspend_mode == MXT_SUSPEND_DEEP_SLEEP)
-			enable_irq(data->irq);
-
 		data->suspended = false;
 	}
 
 	if (!data->in_bootloader) {
-		/* Change to the bootloader mode */
-		data->in_bootloader = true;
+		disable_irq(data->irq);
 
+		/* Change to the bootloader mode */
 		ret = mxt_t6_command(data, MXT_COMMAND_RESET,
 				     MXT_BOOT_VALUE, false);
 		if (ret)
@@ -3338,67 +3319,73 @@ static int mxt_enter_bootloader(struct mxt_data *data)
 		if (ret)
 			return ret;
 
+		data->in_bootloader = true;
 		mxt_sysfs_remove(data);
 		mxt_free_input_device(data);
 		mxt_free_object_table(data);
-	} else {
-		enable_irq(data->irq);
 	}
 
-	reinit_completion(&data->chg_completion);
+	dev_dbg(&data->client->dev, "Entered bootloader\n");
 
 	return 0;
 }
 
+static void mxt_fw_work(struct work_struct *work)
+{
+	struct mxt_flash *f =
+		container_of(work, struct mxt_flash, work.work);
+
+	mxt_check_bootloader(f->data);
+}
+
 static int mxt_load_fw(struct device *dev)
 {
 	struct mxt_data *data = dev_get_drvdata(dev);
-	struct mxt_flash f = { 0, };
 	int ret;
 
-	ret = request_firmware(&f.fw, data->fw_name, dev);
+	data->flash = devm_kzalloc(dev, sizeof(struct mxt_flash), GFP_KERNEL);
+	if (!data->flash)
+		return -ENOMEM;
+
+	data->flash->data = data;
+
+	ret = request_firmware(&data->flash->fw, data->fw_name, dev);
 	if (ret) {
 		dev_err(dev, "Unable to open firmware %s\n", data->fw_name);
-		return ret;
+		goto free;
 	}
 
 	/* Check for incorrect enc file */
-	ret = mxt_check_firmware_format(dev, f.fw);
+	ret = mxt_check_firmware_format(dev, data->flash->fw);
 	if (ret)
 		goto release_firmware;
 
-	ret = mxt_enter_bootloader(data);
-	if (ret)
-		goto release_firmware;
+	init_completion(&data->flash->flash_completion);
+	INIT_DELAYED_WORK(&data->flash->work, mxt_fw_work);
+	reinit_completion(&data->flash->flash_completion);
 
-	while (true) {
-		ret = mxt_check_bootloader(data, &f);
+	if (!data->in_bootloader) {
+		ret = mxt_enter_bootloader(data);
 		if (ret)
-			return ret;
-
-		if (f.complete)
-			break;
+			goto release_firmware;
 	}
 
-	/* Wait for flash. */
-	ret = mxt_wait_for_completion(data, &data->chg_completion,
-				      MXT_FW_RESET_TIME);
-	if (ret)
-		goto disable_irq;
+	enable_irq(data->irq);
 
+	/* Poll after 0.1s if no interrupt received */
+	schedule_delayed_work(&data->flash->work, msecs_to_jiffies(100));
 
-	/*
-	 * Wait for device to reset. Some bootloader versions do not assert
-	 * the CHG line after bootloading has finished, so ignore potential
-	 * errors.
-	 */
-	mxt_wait_for_completion(data, &data->chg_completion, MXT_FW_RESET_TIME);
+	/* Wait for flash. */
+	ret = mxt_wait_for_completion(data, &data->flash->flash_completion,
+				      MXT_BOOTLOADER_WAIT);
 
-	data->in_bootloader = false;
-disable_irq:
 	disable_irq(data->irq);
+	cancel_delayed_work_sync(&data->flash->work);
+	data->in_bootloader = false;
 release_firmware:
-	release_firmware(f.fw);
+	release_firmware(data->flash->fw);
+free:
+	devm_kfree(dev, data->flash);
 	return ret;
 }
 
-- 
2.17.1


  parent reply index

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-12  8:41 [PATCH v7 00/48] atmel_mxt_ts misc Jiada Wang
2020-02-12  8:41 ` [PATCH v7 01/48] Input: introduce input_mt_report_slot_inactive Jiada Wang
2020-02-12  8:41 ` [PATCH v7 02/48] Input: atmel_mxt_ts - rework sysfs init/remove Jiada Wang
2020-02-12  8:41 ` [PATCH v7 03/48] Input: atmel_mxt_ts - only read messages in mxt_acquire_irq() when necessary Jiada Wang
2020-03-17 22:44   ` Dmitry Osipenko
2020-03-18 13:02     ` Wang, Jiada
2020-02-12  8:41 ` [PATCH v7 04/48] Input: atmel_mxt_ts - split large i2c transfers into blocks Jiada Wang
2020-02-12  8:41 ` [PATCH v7 05/48] Input: atmel_mxt_ts - output status from T48 Noise Supression Jiada Wang
2020-02-12  8:41 ` [PATCH v7 06/48] Input: atmel_mxt_ts - output status from T42 Touch Suppression Jiada Wang
2020-02-12  8:41 ` [PATCH v7 07/48] Input: atmel_mxt_ts - implement T9 vector/orientation support Jiada Wang
2020-02-12  8:41 ` [PATCH v7 08/48] Input: atmel_mxt_ts - implement T15 Key Array support Jiada Wang
2020-02-12  8:41 ` [PATCH v7 09/48] Input: atmel_mxt_ts - handle reports from T47 Stylus object Jiada Wang
2020-02-12  8:41 ` [PATCH v7 10/48] Input: atmel_mxt_ts - implement support for T107 active stylus Jiada Wang
2020-02-12  8:41 ` [PATCH v7 11/48] Input: atmel_mxt_ts - add debug for T92 gesture and T93 touch seq msgs Jiada Wang
2020-02-12  8:41 ` [PATCH v7 12/48] Input: atmel_mxt_ts - release touch state during suspend Jiada Wang
2020-02-12  8:41 ` [PATCH v7 13/48] Input: atmel_mxt_ts - add regulator control support Jiada Wang
2020-03-12 15:26   ` Dmitry Osipenko
2020-02-12  8:41 ` [PATCH v7 14/48] Input: atmel_mxt_ts - report failures in suspend/resume Jiada Wang
2020-02-12  8:41 ` [PATCH v7 15/48] Input: atmel_mxt_ts - allow specification of firmware file name Jiada Wang
2020-02-12  8:41 ` [PATCH v7 16/48] Input: atmel_mxt_ts - handle cfg filename via pdata/sysfs Jiada Wang
2020-02-12  8:41 ` [PATCH v7 17/48] Input: atmel_mxt_ts - allow input name to be specified in platform data Jiada Wang
2020-02-12  8:41 ` [PATCH v7 18/48] Input: atmel_mxt_ts - add config checksum attribute to sysfs Jiada Wang
2020-02-12  8:41 ` [PATCH v7 19/48] Input: atmel_mxt_ts - refactor firmware flash to extract context into struct Jiada Wang
2020-02-12  8:41 ` [PATCH v7 20/48] Input: atmel_mxt_ts - refactor code to enter bootloader into separate func Jiada Wang
2020-02-12  8:41 ` [PATCH v7 21/48] Input: atmel_mxt_ts - combine bootloader version query with probe Jiada Wang
2020-02-12  8:41 ` [PATCH v7 22/48] Input: atmel_mxt_ts - improve bootloader state machine handling Jiada Wang
2020-03-12 15:28   ` Dmitry Osipenko
2020-02-12  8:41 ` [PATCH v7 23/48] Input: atmel_mxt_ts - rename bl_completion to chg_completion Jiada Wang
2020-02-12  8:41 ` Jiada Wang [this message]
2020-02-12  8:41 ` [PATCH v7 25/48] Input: atmel_mxt_ts - delay enabling IRQ when not using regulators Jiada Wang
2020-02-12  8:41 ` [PATCH v7 26/48] Input: atmel_mxt_ts - implement I2C retries Jiada Wang
2020-02-12  8:41 ` [PATCH v7 27/48] Input: atmel_mxt_ts - orientation is not present in hover Jiada Wang
2020-02-12  8:41 ` [PATCH v7 28/48] Input: atmel_mxt_ts - implement debug output for messages Jiada Wang
2020-02-12  8:41 ` [PATCH v7 29/48] Input: atmel_mxt_ts - implement improved debug message interface Jiada Wang
2020-02-12  8:42 ` [PATCH v7 30/48] Input: atmel_mxt_ts - eliminate data->raw_info_block Jiada Wang
2020-02-12  8:42 ` [PATCH v7 31/48] Input: atmel_mxt_ts - Change call-points of mxt_free_* functions Jiada Wang
2020-02-12  8:42 ` [PATCH v7 32/48] Input: atmel_mxt_ts - rely on calculated_crc rather than file config_crc Jiada Wang
2020-02-12  8:42 ` [PATCH v7 33/48] input: atmel_mxt_ts: export GPIO reset line via sysfs Jiada Wang
2020-02-12  8:42 ` [PATCH v7 34/48] input: atmel_mxt_ts: Add Missing Delay for reset handling of Atmel touch panel controller in detachable displays Jiada Wang
2020-02-12  8:42 ` [PATCH v7 35/48] Input: atmel_mxt_ts: Add support for run self-test routine Jiada Wang
2020-02-12  8:42 ` [PATCH v7 36/48] Input: atmel_mxt_ts: Limit the max bytes transferred in an i2c transaction Jiada Wang
2020-02-12  8:42 ` [PATCH v7 37/48] Input: atmel_mxt_ts: return error from mxt_process_messages_until_invalid() Jiada Wang
2020-02-12  8:42 ` [PATCH v7 38/48] Input: Atmel: improve error handling in mxt_start() Jiada Wang
2020-02-12  8:42 ` [PATCH v7 39/48] Input: Atmel: improve error handling in mxt_initialize() Jiada Wang
2020-02-12  8:42 ` [PATCH v7 40/48] Input: Atmel: improve error handling in mxt_update_cfg() Jiada Wang
2020-02-12  8:42 ` [PATCH v7 41/48] Input: Atmel: Improve error handling in mxt_initialize_input_device() Jiada Wang
2020-02-12  8:42 ` [PATCH v7 42/48] Input: Atmel: handle ReportID "0x00" while processing T5 messages Jiada Wang
2020-02-12  8:42 ` [PATCH v7 43/48] Input: Atmel: use T44 object to process " Jiada Wang
2020-02-12  8:42 ` [PATCH v7 44/48] Input: atmel_mxt_ts: use gpiod_set_value_cansleep for reset pin Jiada Wang
2020-02-12  8:42 ` [PATCH v7 45/48] input: touchscreen: atmel_mxt_ts: Added sysfs entry for touchscreen status Jiada Wang
2020-02-12  8:42 ` [PATCH v7 46/48] input: atmel_mxt_ts: added sysfs interface to update atmel T38 data Jiada Wang
2020-02-12  8:42 ` [PATCH v7 47/48] Input: atmel_mxt_ts: Implement synchronization during various operation Jiada Wang
2020-02-12  8:42 ` [PATCH v7 48/48] Input: atmel_mxt_ts - Fix compilation warning Jiada Wang
2020-03-11  1:09 ` [PATCH v7 00/48] atmel_mxt_ts misc Wang, Jiada
2020-03-12 15:21 ` Dmitry Osipenko
2020-03-16  6:50   ` Wang, Jiada
2020-03-20  3:37   ` Wang, Jiada
2020-03-20 15:53     ` Dmitry Osipenko
2020-03-23  2:25       ` Wang, Jiada
2020-03-24 14:54         ` Dmitry Osipenko
2020-03-24 15:03           ` Dmitry Osipenko
2020-03-25 12:13           ` Wang, Jiada

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