From patchwork Fri May 8 05:56:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Jiada" X-Patchwork-Id: 11535577 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 41B67159A for ; Fri, 8 May 2020 05:58:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3327821582 for ; Fri, 8 May 2020 05:58:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727995AbgEHF6q (ORCPT ); Fri, 8 May 2020 01:58:46 -0400 Received: from esa1.mentor.iphmx.com ([68.232.129.153]:38715 "EHLO esa1.mentor.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728025AbgEHF6p (ORCPT ); Fri, 8 May 2020 01:58:45 -0400 IronPort-SDR: HmIP7Nv1cFb6mB1nPz9E2pcK+TFTaEyROys2FWtAHsbogEKM/e7nzPw6j8OyZ3BZ2/ddfkYefw GYtAJ1tMqRKEp6YQTWhmhANrssJVpuUywsNESr9XjPMmziir0bL/We3ZHUqhXXm8eCxL37bjHB 7FL/pNJ6z7w8myfC8VLHwsExGGln0N5gazf96+W1T/khn3KnHF+1HuA+M8S4CYzbWpuwFDvFwo wQj6/2+58GxLD5Od5Ik1vyYTcSMMwOYBX65FX6nAmkTe+ov4vUhG1hrGRoCB1Dh+s159X2cC2/ oBE= X-IronPort-AV: E=Sophos;i="5.73,366,1583222400"; d="scan'208";a="50670102" Received: from orw-gwy-02-in.mentorg.com ([192.94.38.167]) by esa1.mentor.iphmx.com with ESMTP; 07 May 2020 21:58:42 -0800 IronPort-SDR: Dovf0Zltps35i24+B4fT2Hb0aNvonZO0OQFkaUR1Pf8vexF/yHxpJHvOaVvfsDA3L5rSjBhFdx Q1NdD3PVi3gHWL2DqIpCHlDMuj8FT+ZI5cHLz6tieNhbyOVEEaGoYWh5MDW8n7gsJSpLLZwJm5 TrGvmw0nd5UoeZTOqvSm2VfaSCKsCc2JKwBt5rOJ9H6niPIkxgBTm/tm8b7psZEtplXY2GCURv Rwy6H2NO2wb+GJbpzYIV1XE/UbvbO/ikTkg2MKbVmHHsV4bPLYDSvGLl20hL1FBUP8Bq84sg2Y IiQ= From: Jiada Wang To: , , , , CC: , , , , Subject: [PATCH v11 27/56] Input: atmel_mxt_ts - refactor firmware flash to extract context into struct Date: Thu, 7 May 2020 22:56:27 -0700 Message-ID: <20200508055656.96389-28-jiada_wang@mentor.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200508055656.96389-1-jiada_wang@mentor.com> References: <20200508055656.96389-1-jiada_wang@mentor.com> MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org From: Nick Dyer Refactor firmware flash to extract context into struct Signed-off-by: Nick Dyer (cherry picked from ndyer/linux/for-upstream commit 1bbe20ff3dcd6612e7942c495929eae5c138ece2) Signed-off-by: George G. Davis [jiada: Add commit description] Signed-off-by: Jiada Wang --- 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 c3dd6c486c12..bb4fc13defea 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -292,6 +292,22 @@ 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; @@ -3240,21 +3256,17 @@ 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; @@ -3308,41 +3320,42 @@ 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. */ @@ -3351,7 +3364,7 @@ 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 @@ -3365,7 +3378,7 @@ 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; }