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From: Jiada Wang <jiada_wang@mentor.com>
To: <nick@shmanahar.org>, <dmitry.torokhov@gmail.com>,
	<jikos@kernel.org>, <benjamin.tissoires@redhat.com>,
	<bsz@semihalf.com>, <rydberg@bitmath.org>
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 v8 22/52] Input: atmel_mxt_ts - refactor firmware flash to extract context into struct
Date: Thu, 19 Mar 2020 07:59:46 -0700
Message-ID: <20200319150016.61398-23-jiada_wang@mentor.com> (raw)
In-Reply-To: <20200319150016.61398-1-jiada_wang@mentor.com>

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

Refactor firmware flash to extract context into struct

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
(cherry picked from ndyer/linux/for-upstream commit 1bbe20ff3dcd6612e7942c495929eae5c138ece2)
Signed-off-by: George G. Davis <george_davis@mentor.com>
[jiada: Add commit description]
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
---
 drivers/input/touchscreen/atmel_mxt_ts.c | 59 +++++++++++++++---------
 1 file changed, 36 insertions(+), 23 deletions(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 7441dc71bbab..e5dc554a0845 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -291,6 +291,22 @@ struct mxt_cfg {
 	struct mxt_info info;
 };
 
+/* Firmware frame structure */
+struct mxt_fw_frame {
+	__be16 size;
+	u8 data[];
+};
+
+/* Firmware update context */
+struct mxt_flash {
+	const struct firmware *fw;
+	struct mxt_fw_frame *frame;
+	loff_t pos;
+	size_t frame_size;
+	unsigned int count;
+	unsigned int retry;
+};
+
 /* Each client has this additional data */
 struct mxt_data {
 	struct i2c_client *client;
@@ -3244,21 +3260,17 @@ static int mxt_check_firmware_format(struct device *dev,
 static int mxt_load_fw(struct device *dev)
 {
 	struct mxt_data *data = dev_get_drvdata(dev);
-	const struct firmware *fw = NULL;
-	unsigned int frame_size;
-	unsigned int pos = 0;
-	unsigned int retry = 0;
-	unsigned int frame = 0;
+	struct mxt_flash f = { 0, };
 	int ret;
 
-	ret = request_firmware(&fw, data->fw_name, dev);
+	ret = request_firmware(&f.fw, data->fw_name, dev);
 	if (ret) {
 		dev_err(dev, "Unable to open firmware %s\n", data->fw_name);
 		return ret;
 	}
 
 	/* Check for incorrect enc file */
-	ret = mxt_check_firmware_format(dev, fw);
+	ret = mxt_check_firmware_format(dev, f.fw);
 	if (ret)
 		goto release_firmware;
 
@@ -3312,41 +3324,42 @@ static int mxt_load_fw(struct device *dev)
 			goto disable_irq;
 	}
 
-	while (pos < fw->size) {
+	while (f.pos < f.fw->size) {
+		f.frame = (struct mxt_fw_frame *)(f.fw->data + f.pos);
+
 		ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true);
 		if (ret)
 			goto disable_irq;
 
-		frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
-
 		/* Take account of CRC bytes */
-		frame_size += 2;
+		f.frame_size = __be16_to_cpu(f.frame->size) + 2U;
 
 		/* Write one frame to device */
-		ret = mxt_bootloader_write(data, fw->data + pos, frame_size);
+		ret = mxt_bootloader_write(data, f.fw->data + f.pos,
+					   f.frame_size);
 		if (ret)
 			goto disable_irq;
 
 		ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true);
 		if (ret) {
-			retry++;
+			f.retry++;
 
 			/* Back off by 20ms per retry */
-			msleep(retry * 20);
+			msleep(f.retry * 20);
 
-			if (retry > 20) {
+			if (f.retry > 20) {
 				dev_err(dev, "Retry count exceeded\n");
 				goto disable_irq;
 			}
 		} else {
-			retry = 0;
-			pos += frame_size;
-			frame++;
+			f.retry = 0;
+			f.pos += f.frame_size;
+			f.count++;
 		}
 
-		if (frame % 50 == 0)
-			dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n",
-				frame, pos, fw->size);
+		if (f.count % 50 == 0)
+			dev_dbg(dev, "Sent %u frames, %lld/%zu bytes\n",
+				f.count, f.pos, f.fw->size);
 	}
 
 	/* Wait for flash. */
@@ -3355,7 +3368,7 @@ static int mxt_load_fw(struct device *dev)
 	if (ret)
 		goto disable_irq;
 
-	dev_dbg(dev, "Sent %d frames, %d bytes\n", frame, pos);
+	dev_dbg(dev, "Sent %u frames, %lld bytes\n", f.count, f.pos);
 
 	/*
 	 * Wait for device to reset. Some bootloader versions do not assert
@@ -3369,7 +3382,7 @@ static int mxt_load_fw(struct device *dev)
 disable_irq:
 	disable_irq(data->irq);
 release_firmware:
-	release_firmware(fw);
+	release_firmware(f.fw);
 	return ret;
 }
 
-- 
2.17.1


  parent reply index

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-19 14:59 [PATCH v8 00/52] atmel_mxt_ts misc Jiada Wang
2020-03-19 14:59 ` [PATCH v8 01/52] Input: introduce input_mt_report_slot_inactive Jiada Wang
2020-03-19 14:59 ` [PATCH v8 02/52] Input: atmel_mxt_ts - rework sysfs init/remove Jiada Wang
2020-03-19 14:59 ` [PATCH v8 03/52] Input: atmel_mxt_ts - only read messages in mxt_acquire_irq() when necessary Jiada Wang
2020-03-19 14:59 ` [PATCH v8 04/52] Input: atmel_mxt_ts - split large i2c transfers into blocks Jiada Wang
2020-03-19 14:59 ` [PATCH v8 05/52] Input: atmel_mxt_ts - output status from T48 Noise Supression Jiada Wang
2020-03-19 14:59 ` [PATCH v8 06/52] Input: atmel_mxt_ts - output status from T42 Touch Suppression Jiada Wang
2020-03-19 14:59 ` [PATCH v8 07/52] Input: atmel_mxt_ts - implement T9 vector/orientation support Jiada Wang
2020-03-19 14:59 ` [PATCH v8 08/52] Input: atmel_mxt_ts - implement T15 Key Array support Jiada Wang
2020-03-19 14:59 ` [PATCH v8 09/52] Input: atmel_mxt_ts - handle reports from T47 Stylus object Jiada Wang
2020-03-19 14:59 ` [PATCH v8 10/52] Input: atmel_mxt_ts - implement support for T107 active stylus Jiada Wang
2020-03-19 14:59 ` [PATCH v8 11/52] Input: atmel_mxt_ts - add debug for T92 gesture and T93 touch seq msgs Jiada Wang
2020-03-19 14:59 ` [PATCH v8 12/52] Input: atmel_mxt_ts - release touch state during suspend Jiada Wang
2020-03-19 14:59 ` [PATCH v8 13/52] Input: atmel_mxt_ts - add regulator control support Jiada Wang
2020-03-19 14:59 ` [PATCH v8 14/52] dt-bindings: input: atmel: add suspend mode support Jiada Wang
2020-03-19 14:59 ` [PATCH v8 15/52] Input: atmel_mxt_ts - report failures in suspend/resume Jiada Wang
2020-03-19 14:59 ` [PATCH v8 16/52] Input: atmel_mxt_ts - allow specification of firmware file name Jiada Wang
2020-03-19 14:59 ` [PATCH v8 17/52] Input: atmel_mxt_ts - handle cfg filename via pdata/sysfs Jiada Wang
2020-03-19 14:59 ` [PATCH v8 18/52] dt-bindings: input: atmel: provide name of configuration file Jiada Wang
2020-03-19 14:59 ` [PATCH v8 19/52] Input: atmel_mxt_ts - allow input name to be specified in platform data Jiada Wang
2020-03-19 14:59 ` [PATCH v8 20/52] dt-bindings: input: atmel: support to specify input name Jiada Wang
2020-03-19 14:59 ` [PATCH v8 21/52] Input: atmel_mxt_ts - add config checksum attribute to sysfs Jiada Wang
2020-03-19 14:59 ` Jiada Wang [this message]
2020-03-19 14:59 ` [PATCH v8 23/52] Input: atmel_mxt_ts - refactor code to enter bootloader into separate func Jiada Wang
2020-03-19 14:59 ` [PATCH v8 24/52] Input: atmel_mxt_ts - combine bootloader version query with probe Jiada Wang
2020-03-19 14:59 ` [PATCH v8 25/52] Input: atmel_mxt_ts - improve bootloader state machine handling Jiada Wang
2020-03-19 14:59 ` [PATCH v8 26/52] Input: atmel_mxt_ts - rename bl_completion to chg_completion Jiada Wang
2020-03-19 14:59 ` [PATCH v8 27/52] Input: atmel_mxt_ts - make bootloader interrupt driven Jiada Wang
2020-03-19 14:59 ` [PATCH v8 28/52] Input: atmel_mxt_ts - delay enabling IRQ when not using regulators Jiada Wang
2020-03-19 14:59 ` [PATCH v8 29/52] Input: atmel_mxt_ts - implement I2C retries Jiada Wang
2020-03-19 14:59 ` [PATCH v8 30/52] Input: atmel_mxt_ts - orientation is not present in hover Jiada Wang
2020-03-19 14:59 ` [PATCH v8 31/52] Input: atmel_mxt_ts - implement debug output for messages Jiada Wang
2020-03-19 14:59 ` [PATCH v8 32/52] Input: atmel_mxt_ts - implement improved debug message interface Jiada Wang
2020-03-19 14:59 ` [PATCH v8 33/52] Input: atmel_mxt_ts - eliminate data->raw_info_block Jiada Wang
2020-03-19 14:59 ` [PATCH v8 34/52] Input: atmel_mxt_ts - Change call-points of mxt_free_* functions Jiada Wang
2020-03-19 14:59 ` [PATCH v8 35/52] Input: atmel_mxt_ts - rely on calculated_crc rather than file config_crc Jiada Wang
2020-03-19 15:00 ` [PATCH v8 36/52] input: atmel_mxt_ts: export GPIO reset line via sysfs Jiada Wang
2020-03-19 15:00 ` [PATCH v8 37/52] input: atmel_mxt_ts: Add Missing Delay for reset handling of Atmel touch panel controller in detachable displays Jiada Wang
2020-03-19 15:00 ` [PATCH v8 38/52] Input: atmel_mxt_ts: Add support for run self-test routine Jiada Wang
2020-03-19 15:00 ` [PATCH v8 39/52] Input: atmel_mxt_ts: Limit the max bytes transferred in an i2c transaction Jiada Wang
2020-03-19 15:00 ` [PATCH v8 40/52] dt-bindings: input: atmel: support to set max bytes transferred Jiada Wang
2020-03-19 15:00 ` [PATCH v8 41/52] Input: atmel_mxt_ts: return error from mxt_process_messages_until_invalid() Jiada Wang
2020-03-19 15:00 ` [PATCH v8 42/52] Input: Atmel: improve error handling in mxt_start() Jiada Wang
2020-03-19 15:00 ` [PATCH v8 43/52] Input: Atmel: improve error handling in mxt_initialize() Jiada Wang
2020-03-19 15:00 ` [PATCH v8 44/52] Input: Atmel: improve error handling in mxt_update_cfg() Jiada Wang
2020-03-19 15:00 ` [PATCH v8 45/52] Input: Atmel: Improve error handling in mxt_initialize_input_device() Jiada Wang
2020-03-19 15:00 ` [PATCH v8 46/52] Input: Atmel: handle ReportID "0x00" while processing T5 messages Jiada Wang
2020-03-19 15:00 ` [PATCH v8 47/52] Input: Atmel: use T44 object to process " Jiada Wang
2020-03-19 15:00 ` [PATCH v8 48/52] Input: atmel_mxt_ts: use gpiod_set_value_cansleep for reset pin Jiada Wang
2020-03-19 15:00 ` [PATCH v8 49/52] input: touchscreen: atmel_mxt_ts: Added sysfs entry for touchscreen status Jiada Wang
2020-03-19 15:00 ` [PATCH v8 50/52] input: atmel_mxt_ts: added sysfs interface to update atmel T38 data Jiada Wang
2020-03-19 15:00 ` [PATCH v8 51/52] Input: atmel_mxt_ts: Implement synchronization during various operation Jiada Wang
2020-03-19 15:00 ` [PATCH v8 52/52] Input: atmel_mxt_ts - Fix compilation warning Jiada Wang

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