From patchwork Wed Jun 5 17:37:27 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nick Dyer X-Patchwork-Id: 2672111 Return-Path: X-Original-To: patchwork-linux-input@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id A46993FD4F for ; Wed, 5 Jun 2013 17:51:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757254Ab3FERvZ (ORCPT ); Wed, 5 Jun 2013 13:51:25 -0400 Received: from kdh-gw.itdev.co.uk ([89.21.227.133]:44043 "EHLO hermes.kdh.itdev.co.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1757180Ab3FERsS (ORCPT ); Wed, 5 Jun 2013 13:48:18 -0400 Received: from juno.kdh.itdev.co.uk (juno.kdh.itdev.co.uk [192.168.1.125]) by hermes.kdh.itdev.co.uk (Postfix) with ESMTP id 765CA84E19; Wed, 5 Jun 2013 18:37:56 +0100 (BST) From: Nick Dyer To: Dmitry Torokhov , Daniel Kurtz , Henrik Rydberg , Joonyoung Shim , Alan.Bowens@atmel.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, pmeerw@pmeerw.net, bleung@chromium.org, olofj@chromium.org Cc: Nick Dyer Subject: [PATCH 34/53] Input: atmel_mxt_ts - Decode T6 status messages Date: Wed, 5 Jun 2013 18:37:27 +0100 Message-Id: <1370453866-16534-35-git-send-email-nick.dyer@itdev.co.uk> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1370453866-16534-1-git-send-email-nick.dyer@itdev.co.uk> References: <1370453866-16534-1-git-send-email-nick.dyer@itdev.co.uk> Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org By storing the previous T6 status byte we can detect reset completion more correctly, and multiple debug output of the same status can be suppressed (for example CFGERR). Signed-off-by: Nick Dyer Acked-by: Benson Leung --- drivers/input/touchscreen/atmel_mxt_ts.c | 60 ++++++++++++++++++++---------- 1 file changed, 40 insertions(+), 20 deletions(-) diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index 76ad308..39a20fd 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -91,6 +91,11 @@ /* Define for T6 status byte */ #define MXT_T6_STATUS_RESET (1 << 7) +#define MXT_T6_STATUS_OFL (1 << 6) +#define MXT_T6_STATUS_SIGERR (1 << 5) +#define MXT_T6_STATUS_CAL (1 << 4) +#define MXT_T6_STATUS_CFGERR (1 << 3) +#define MXT_T6_STATUS_COMSERR (1 << 2) /* MXT_GEN_POWER_T7 field */ struct t7_config { @@ -248,6 +253,7 @@ struct mxt_data { u8 bootloader_addr; struct t7_config t7_cfg; u8 *msg_buf; + u8 t6_status; /* Cached parameters from object table */ u8 T5_msg_size; @@ -631,6 +637,39 @@ mxt_get_object(struct mxt_data *data, u8 type) return NULL; } +static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg) +{ + struct device *dev = &data->client->dev; + u8 status = msg[1]; + u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16); + + if (crc != data->config_crc) { + data->config_crc = crc; + dev_dbg(dev, "T6 Config Checksum: 0x%06X\n", crc); + complete(&data->crc_completion); + } + + /* Detect transition out of reset */ + if ((data->t6_status & MXT_T6_STATUS_RESET) && + !(status & MXT_T6_STATUS_RESET)) + complete(&data->reset_completion); + + /* Output debug if status has changed */ + if (status != data->t6_status) + dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n", + status, + (status == 0) ? " OK" : "", + (status & MXT_T6_STATUS_RESET) ? " RESET" : "", + (status & MXT_T6_STATUS_OFL) ? " OFL" : "", + (status & MXT_T6_STATUS_SIGERR) ? " SIGERR" : "", + (status & MXT_T6_STATUS_CAL) ? " CAL" : "", + (status & MXT_T6_STATUS_CFGERR) ? " CFGERR" : "", + (status & MXT_T6_STATUS_COMSERR) ? " COMSERR" : ""); + + /* Save current status */ + data->t6_status = status; +} + static int mxt_read_message(struct mxt_data *data, u8 *message) { struct mxt_object *object; @@ -737,11 +776,6 @@ static void mxt_input_touchevent(struct mxt_data *data, u8 *message) } } -static u16 mxt_extract_T6_csum(const u8 *csum) -{ - return csum[0] | (csum[1] << 8) | (csum[2] << 16); -} - static bool mxt_is_T9_message(struct mxt_data *data, u8 *msg) { u8 id = msg[0]; @@ -751,12 +785,10 @@ static bool mxt_is_T9_message(struct mxt_data *data, u8 *msg) static irqreturn_t mxt_process_messages_until_invalid(struct mxt_data *data) { u8 *message = &data->msg_buf[0]; - const u8 *payload = &data->msg_buf[1]; struct device *dev = &data->client->dev; u8 reportid; bool update_input = false; bool dump; - u32 crc; do { if (mxt_read_message(data, message)) { @@ -768,19 +800,7 @@ static irqreturn_t mxt_process_messages_until_invalid(struct mxt_data *data) dump = data->debug_enabled; if (reportid == data->T6_reportid) { - u8 status = payload[0]; - - crc = mxt_extract_T6_csum(&payload[1]); - if (crc != data->config_crc) { - data->config_crc = crc; - complete(&data->crc_completion); - } - - dev_dbg(dev, "Status: %02x Config Checksum: %06x\n", - status, data->config_crc); - - if (status & MXT_T6_STATUS_RESET) - complete(&data->reset_completion); + mxt_proc_t6_messages(data, message); } else if (mxt_is_T9_message(data, message)) { mxt_input_touchevent(data, message); update_input = true;