From patchwork Tue Dec 10 00:19:18 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= X-Patchwork-Id: 11281103 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 596E9138D for ; Tue, 10 Dec 2019 00:19:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 24DEA20828 for ; Tue, 10 Dec 2019 00:19:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=rere.qmqm.pl header.i=@rere.qmqm.pl header.b="QSGxiLA+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727534AbfLJATW (ORCPT ); Mon, 9 Dec 2019 19:19:22 -0500 Received: from rere.qmqm.pl ([91.227.64.183]:7755 "EHLO rere.qmqm.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727306AbfLJATW (ORCPT ); Mon, 9 Dec 2019 19:19:22 -0500 Received: from remote.user (localhost [127.0.0.1]) by rere.qmqm.pl (Postfix) with ESMTPSA id 47X0wt0mZBzTs; Tue, 10 Dec 2019 01:16:46 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=rere.qmqm.pl; s=1; t=1575937006; bh=C0pMDA+0XkJSsZoVADDmL5DdgomEhABsfYUNpNzl0GI=; h=Date:In-Reply-To:References:From:Subject:To:Cc:From; b=QSGxiLA+L7k8nQ+sURzqVSWRNNL3l9iuW0/cVQ7fondMLfXVkdEZOzic2areW/Dul FAsaEcWhTDymVAuO4kdlTI6WzIcZAiRkngf739FZBdZwj2inopIhHLTe9qDipZDmc6 Y5+lUWQZ+ZN/TEUGiaRA50uGs6FEr4lB4y0tKSnAjpzrMpiU9+0vsrMd9bNyaafnCm GtpSdcze4su3+ldwa3C0qip2by4UctdXeGial4Qq7NulxTjrvufA5Q1t7FZYG4RoUB RiCRunEDlQxjzEAepJ+NlKori0MURfXwU6DBZnnBUMVRD/k4VGTanjt00cB+/2i3Xx zj9kf+YpoDNDA== X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.101.4 at mail Date: Tue, 10 Dec 2019 01:19:18 +0100 Message-Id: In-Reply-To: References: From: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= Subject: [PATCH 5/6] input: elants: refactor elants_i2c_execute_command() MIME-Version: 1.0 To: linux-input@vger.kernel.org Cc: Dmitry Torokhov , linux-kernel@vger.kernel.org, Dmitry Osipenko Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Apply some DRY-ing to elants_i2c_execute_command() callers. Signed-off-by: Michał Mirosław --- drivers/input/touchscreen/elants_i2c.c | 182 +++++++++++++------------ 1 file changed, 93 insertions(+), 89 deletions(-) diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c index 2e6c9aa60496..27aca3971da5 100644 --- a/drivers/input/touchscreen/elants_i2c.c +++ b/drivers/input/touchscreen/elants_i2c.c @@ -201,7 +201,8 @@ static int elants_i2c_read(struct i2c_client *client, void *data, size_t size) static int elants_i2c_execute_command(struct i2c_client *client, const u8 *cmd, size_t cmd_size, - u8 *resp, size_t resp_size) + u8 *resp, size_t resp_size, + int retries, const char *cmd_name) { struct i2c_msg msgs[2]; int ret; @@ -217,30 +218,55 @@ static int elants_i2c_execute_command(struct i2c_client *client, break; default: - dev_err(&client->dev, "%s: invalid command %*ph\n", - __func__, (int)cmd_size, cmd); + dev_err(&client->dev, "(%s): invalid command: %*ph\n", + cmd_name, (int)cmd_size, cmd); return -EINVAL; } - msgs[0].addr = client->addr; - msgs[0].flags = client->flags & I2C_M_TEN; - msgs[0].len = cmd_size; - msgs[0].buf = (u8 *)cmd; + for (;;) { + msgs[0].addr = client->addr; + msgs[0].flags = client->flags & I2C_M_TEN; + msgs[0].len = cmd_size; + msgs[0].buf = (u8 *)cmd; - msgs[1].addr = client->addr; - msgs[1].flags = client->flags & I2C_M_TEN; - msgs[1].flags |= I2C_M_RD; - msgs[1].len = resp_size; - msgs[1].buf = resp; + msgs[1].addr = client->addr; + msgs[1].flags = client->flags & I2C_M_TEN; + msgs[1].flags |= I2C_M_RD; + msgs[1].len = resp_size; + msgs[1].buf = resp; - ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); - if (ret < 0) - return ret; + ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs)); + if (ret < 0) { + if (--retries > 0) { + dev_dbg(&client->dev, + "(%s) I2C transfer failed: %d (retrying)\n", + cmd_name, ret); + continue; + } - if (ret != ARRAY_SIZE(msgs) || resp[FW_HDR_TYPE] != expected_response) - return -EIO; + dev_err(&client->dev, + "(%s) I2C transfer failed: %d\n", + cmd_name, ret); + return ret; + } - return 0; + if (ret != ARRAY_SIZE(msgs) || + resp[FW_HDR_TYPE] != expected_response) { + if (--retries > 0) { + dev_dbg(&client->dev, + "(%s) unexpected response: %*ph (retrying)\n", + cmd_name, ret, resp); + continue; + } + + dev_err(&client->dev, + "(%s) unexpected response: %*ph\n", + cmd_name, ret, resp); + return -EIO; + } + + return --retries; + } } static int elants_i2c_calibrate(struct elants_data *ts) @@ -313,27 +339,20 @@ static u16 elants_i2c_parse_version(u8 *buf) static int elants_i2c_query_hw_version(struct elants_data *ts) { struct i2c_client *client = ts->client; - int error, retry_cnt; + int retry_cnt = MAX_RETRIES; const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_FW_ID, 0x00, 0x01 }; u8 resp[HEADER_SIZE]; - for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) { - error = elants_i2c_execute_command(client, cmd, sizeof(cmd), - resp, sizeof(resp)); - if (!error) { - ts->hw_version = elants_i2c_parse_version(resp); - if (ts->hw_version != 0xffff) - return 0; - } + while (retry_cnt) { + retry_cnt = elants_i2c_execute_command(client, cmd, sizeof(cmd), + resp, sizeof(resp), + retry_cnt, "read fw id"); + if (retry_cnt < 0) + return retry_cnt; - dev_dbg(&client->dev, "read fw id error=%d, buf=%*phC\n", - error, (int)sizeof(resp), resp); - } - - if (error) { - dev_err(&client->dev, - "Failed to read fw id: %d\n", error); - return error; + ts->hw_version = elants_i2c_parse_version(resp); + if (ts->hw_version != 0xffff) + return 0; } dev_err(&client->dev, "Invalid fw id: %#04x\n", ts->hw_version); @@ -344,26 +363,28 @@ static int elants_i2c_query_hw_version(struct elants_data *ts) static int elants_i2c_query_fw_version(struct elants_data *ts) { struct i2c_client *client = ts->client; - int error, retry_cnt; + int retry_cnt = MAX_RETRIES; const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_FW_VER, 0x00, 0x01 }; u8 resp[HEADER_SIZE]; - for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) { - error = elants_i2c_execute_command(client, cmd, sizeof(cmd), - resp, sizeof(resp)); - if (!error) { - ts->fw_version = elants_i2c_parse_version(resp); - if (ts->fw_version != 0x0000 && - ts->fw_version != 0xffff) - return 0; - } + while (retry_cnt) { + retry_cnt = elants_i2c_execute_command(client, cmd, + sizeof(cmd), + resp, sizeof(resp), + retry_cnt, + "read fw version"); + if (retry_cnt < 0) + return retry_cnt; - dev_dbg(&client->dev, "read fw version error=%d, buf=%*phC\n", - error, (int)sizeof(resp), resp); + ts->fw_version = elants_i2c_parse_version(resp); + if (ts->fw_version != 0x0000 && ts->fw_version != 0xffff) + return 0; + + dev_dbg(&client->dev, "(read fw version) resp %*phC\n", + (int)sizeof(resp), resp); } - dev_err(&client->dev, - "Failed to read fw version or fw version is invalid\n"); + dev_err(&client->dev, "Invalid fw ver: %#04x\n", ts->fw_version); return -EINVAL; } @@ -371,25 +392,20 @@ static int elants_i2c_query_fw_version(struct elants_data *ts) static int elants_i2c_query_test_version(struct elants_data *ts) { struct i2c_client *client = ts->client; - int error, retry_cnt; + int error; u16 version; const u8 cmd[] = { CMD_HEADER_READ, E_ELAN_INFO_TEST_VER, 0x00, 0x01 }; u8 resp[HEADER_SIZE]; - for (retry_cnt = 0; retry_cnt < MAX_RETRIES; retry_cnt++) { - error = elants_i2c_execute_command(client, cmd, sizeof(cmd), - resp, sizeof(resp)); - if (!error) { - version = elants_i2c_parse_version(resp); - ts->test_version = version >> 8; - ts->solution_version = version & 0xff; + error = elants_i2c_execute_command(client, cmd, sizeof(cmd), + resp, sizeof(resp), MAX_RETRIES, + "read test version"); + if (error >= 0) { + version = elants_i2c_parse_version(resp); + ts->test_version = version >> 8; + ts->solution_version = version & 0xff; - return 0; - } - - dev_dbg(&client->dev, - "read test version error rc=%d, buf=%*phC\n", - error, (int)sizeof(resp), resp); + return 0; } dev_err(&client->dev, "Failed to read test version\n"); @@ -406,13 +422,10 @@ static int elants_i2c_query_bc_version(struct elants_data *ts) int error; error = elants_i2c_execute_command(client, cmd, sizeof(cmd), - resp, sizeof(resp)); - if (error) { - dev_err(&client->dev, - "read BC version error=%d, buf=%*phC\n", - error, (int)sizeof(resp), resp); + resp, sizeof(resp), 1, + "read BC version"); + if (error) return error; - } version = elants_i2c_parse_version(resp); ts->bc_version = version >> 8; @@ -444,12 +457,10 @@ static int elants_i2c_query_ts_info(struct elants_data *ts) error = elants_i2c_execute_command(client, get_resolution_cmd, sizeof(get_resolution_cmd), - resp, sizeof(resp)); - if (error) { - dev_err(&client->dev, "get resolution command failed: %d\n", - error); + resp, sizeof(resp), 1, + "get resolution"); + if (error) return error; - } rows = resp[2] + resp[6] + resp[10]; cols = resp[3] + resp[7] + resp[11]; @@ -457,36 +468,29 @@ static int elants_i2c_query_ts_info(struct elants_data *ts) /* Process mm_to_pixel information */ error = elants_i2c_execute_command(client, get_osr_cmd, sizeof(get_osr_cmd), - resp, sizeof(resp)); - if (error) { - dev_err(&client->dev, "get osr command failed: %d\n", - error); + resp, sizeof(resp), 1, "get osr"); + if (error) return error; - } osr = resp[3]; error = elants_i2c_execute_command(client, get_physical_scan_cmd, sizeof(get_physical_scan_cmd), - resp, sizeof(resp)); - if (error) { - dev_err(&client->dev, "get physical scan command failed: %d\n", - error); + resp, sizeof(resp), 1, + "get physical scan"); + if (error) return error; - } phy_x = get_unaligned_be16(&resp[2]); error = elants_i2c_execute_command(client, get_physical_drive_cmd, sizeof(get_physical_drive_cmd), - resp, sizeof(resp)); - if (error) { - dev_err(&client->dev, "get physical drive command failed: %d\n", - error); + resp, sizeof(resp), 1, + "get physical drive"); + if (error) return error; - } phy_y = get_unaligned_be16(&resp[2]);