From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.4 required=3.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5427DC06513 for ; Thu, 4 Jul 2019 09:58:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 22C2C21882 for ; Thu, 4 Jul 2019 09:58:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727436AbfGDJ6s (ORCPT ); Thu, 4 Jul 2019 05:58:48 -0400 Received: from ns.iliad.fr ([212.27.33.1]:39500 "EHLO ns.iliad.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727223AbfGDJ6s (ORCPT ); Thu, 4 Jul 2019 05:58:48 -0400 Received: from ns.iliad.fr (localhost [127.0.0.1]) by ns.iliad.fr (Postfix) with ESMTP id BE98820BD5; Thu, 4 Jul 2019 11:58:45 +0200 (CEST) Received: from [192.168.108.49] (freebox.vlq16.iliad.fr [213.36.7.13]) by ns.iliad.fr (Postfix) with ESMTP id A61FC205C8; Thu, 4 Jul 2019 11:58:45 +0200 (CEST) From: Marc Gonzalez Subject: [PATCH v2] media: si2168: Refactor command setup code To: Antti Palosaari , Mauro Carvalho Chehab , =?UTF-8?Q?Jonathan_Neusch=c3=a4fer?= Cc: linux-media , LKML , MSM , Brad Love , Bjorn Andersson Message-ID: Date: Thu, 4 Jul 2019 11:58:45 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV using ClamSMTP ; ns.iliad.fr ; Thu Jul 4 11:58:45 2019 +0200 (CEST) Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org >From ceb5f687f3f7dab2fb9d5b34408d9cf83a0be228 Mon Sep 17 00:00:00 2001 From: Marc Gonzalez Date: Mon, 1 Jul 2019 12:58:31 +0200 Subject: [PATCH v2] media: si2168: Refactor command setup code Refactor the command setup code, and let the compiler determine the size of each command. Signed-off-by: Marc Gonzalez --- Changes from v1: - Use a real function to populate struct si2168_cmd *cmd, and a trivial macro wrapping it (macro because sizeof). --- drivers/media/dvb-frontends/si2168.c | 146 +++++++++------------------ 1 file changed, 45 insertions(+), 101 deletions(-) diff --git a/drivers/media/dvb-frontends/si2168.c b/drivers/media/dvb-frontends/si2168.c index c64b360ce6b5..5e81e076369c 100644 --- a/drivers/media/dvb-frontends/si2168.c +++ b/drivers/media/dvb-frontends/si2168.c @@ -12,6 +12,16 @@ static const struct dvb_frontend_ops si2168_ops; +static void cmd_setup(struct si2168_cmd *cmd, char *args, int wlen, int rlen) +{ + memcpy(cmd->args, args, wlen); + cmd->wlen = wlen; + cmd->rlen = rlen; +} + +#define CMD_SETUP(cmd, args, rlen) \ + cmd_setup(cmd, args, sizeof(args) - 1, rlen) + /* execute firmware command */ static int si2168_cmd_execute(struct i2c_client *client, struct si2168_cmd *cmd) { @@ -84,15 +94,13 @@ static int si2168_ts_bus_ctrl(struct dvb_frontend *fe, int acquire) dev_dbg(&client->dev, "%s acquire: %d\n", __func__, acquire); /* set TS_MODE property */ - memcpy(cmd.args, "\x14\x00\x01\x10\x10\x00", 6); + CMD_SETUP(&cmd, "\x14\x00\x01\x10\x10\x00", 4); if (acquire) cmd.args[4] |= dev->ts_mode; else cmd.args[4] |= SI2168_TS_TRISTATE; if (dev->ts_clock_gapped) cmd.args[4] |= 0x40; - cmd.wlen = 6; - cmd.rlen = 4; ret = si2168_cmd_execute(client, &cmd); return ret; @@ -116,19 +124,13 @@ static int si2168_read_status(struct dvb_frontend *fe, enum fe_status *status) switch (c->delivery_system) { case SYS_DVBT: - memcpy(cmd.args, "\xa0\x01", 2); - cmd.wlen = 2; - cmd.rlen = 13; + CMD_SETUP(&cmd, "\xa0\x01", 13); break; case SYS_DVBC_ANNEX_A: - memcpy(cmd.args, "\x90\x01", 2); - cmd.wlen = 2; - cmd.rlen = 9; + CMD_SETUP(&cmd, "\x90\x01", 9); break; case SYS_DVBT2: - memcpy(cmd.args, "\x50\x01", 2); - cmd.wlen = 2; - cmd.rlen = 14; + CMD_SETUP(&cmd, "\x50\x01", 14); break; default: ret = -EINVAL; @@ -165,9 +167,7 @@ static int si2168_read_status(struct dvb_frontend *fe, enum fe_status *status) /* BER */ if (*status & FE_HAS_VITERBI) { - memcpy(cmd.args, "\x82\x00", 2); - cmd.wlen = 2; - cmd.rlen = 3; + CMD_SETUP(&cmd, "\x82\x00", 3); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; @@ -198,9 +198,7 @@ static int si2168_read_status(struct dvb_frontend *fe, enum fe_status *status) /* UCB */ if (*status & FE_HAS_SYNC) { - memcpy(cmd.args, "\x84\x01", 2); - cmd.wlen = 2; - cmd.rlen = 3; + CMD_SETUP(&cmd, "\x84\x01", 3); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; @@ -286,22 +284,18 @@ static int si2168_set_frontend(struct dvb_frontend *fe) goto err; } - memcpy(cmd.args, "\x88\x02\x02\x02\x02", 5); - cmd.wlen = 5; - cmd.rlen = 5; + CMD_SETUP(&cmd, "\x88\x02\x02\x02\x02", 5); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; /* that has no big effect */ if (c->delivery_system == SYS_DVBT) - memcpy(cmd.args, "\x89\x21\x06\x11\xff\x98", 6); + CMD_SETUP(&cmd, "\x89\x21\x06\x11\xff\x98", 3); else if (c->delivery_system == SYS_DVBC_ANNEX_A) - memcpy(cmd.args, "\x89\x21\x06\x11\x89\xf0", 6); + CMD_SETUP(&cmd, "\x89\x21\x06\x11\x89\xf0", 3); else if (c->delivery_system == SYS_DVBT2) - memcpy(cmd.args, "\x89\x21\x06\x11\x89\x20", 6); - cmd.wlen = 6; - cmd.rlen = 3; + CMD_SETUP(&cmd, "\x89\x21\x06\x11\x89\x20", 3); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; @@ -318,103 +312,77 @@ static int si2168_set_frontend(struct dvb_frontend *fe) goto err; } - memcpy(cmd.args, "\x51\x03", 2); - cmd.wlen = 2; - cmd.rlen = 12; + CMD_SETUP(&cmd, "\x51\x03", 12); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; - memcpy(cmd.args, "\x12\x08\x04", 3); - cmd.wlen = 3; - cmd.rlen = 3; + CMD_SETUP(&cmd, "\x12\x08\x04", 3); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; - memcpy(cmd.args, "\x14\x00\x0c\x10\x12\x00", 6); - cmd.wlen = 6; - cmd.rlen = 4; + CMD_SETUP(&cmd, "\x14\x00\x0c\x10\x12\x00", 4); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; - memcpy(cmd.args, "\x14\x00\x06\x10\x24\x00", 6); - cmd.wlen = 6; - cmd.rlen = 4; + CMD_SETUP(&cmd, "\x14\x00\x06\x10\x24\x00", 4); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; - memcpy(cmd.args, "\x14\x00\x07\x10\x00\x24", 6); - cmd.wlen = 6; - cmd.rlen = 4; + CMD_SETUP(&cmd, "\x14\x00\x07\x10\x00\x24", 4); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; - memcpy(cmd.args, "\x14\x00\x0a\x10\x00\x00", 6); + CMD_SETUP(&cmd, "\x14\x00\x0a\x10\x00\x00", 4); cmd.args[4] = delivery_system | bandwidth; if (dev->spectral_inversion) cmd.args[5] |= 1; - cmd.wlen = 6; - cmd.rlen = 4; ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; /* set DVB-C symbol rate */ if (c->delivery_system == SYS_DVBC_ANNEX_A) { - memcpy(cmd.args, "\x14\x00\x02\x11", 4); + CMD_SETUP(&cmd, "\x14\x00\x02\x11\x00\x00", 4); cmd.args[4] = ((c->symbol_rate / 1000) >> 0) & 0xff; cmd.args[5] = ((c->symbol_rate / 1000) >> 8) & 0xff; - cmd.wlen = 6; - cmd.rlen = 4; ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; } - memcpy(cmd.args, "\x14\x00\x0f\x10\x10\x00", 6); - cmd.wlen = 6; - cmd.rlen = 4; + CMD_SETUP(&cmd, "\x14\x00\x0f\x10\x10\x00", 4); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; - memcpy(cmd.args, "\x14\x00\x09\x10\xe3\x08", 6); + CMD_SETUP(&cmd, "\x14\x00\x09\x10\xe3\x08", 4); cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10; - cmd.wlen = 6; - cmd.rlen = 4; ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; - memcpy(cmd.args, "\x14\x00\x08\x10\xd7\x05", 6); + CMD_SETUP(&cmd, "\x14\x00\x08\x10\xd7\x05", 4); cmd.args[5] |= dev->ts_clock_inv ? 0x00 : 0x10; - cmd.wlen = 6; - cmd.rlen = 4; ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; - memcpy(cmd.args, "\x14\x00\x01\x12\x00\x00", 6); - cmd.wlen = 6; - cmd.rlen = 4; + CMD_SETUP(&cmd, "\x14\x00\x01\x12\x00\x00", 4); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; - memcpy(cmd.args, "\x14\x00\x01\x03\x0c\x00", 6); - cmd.wlen = 6; - cmd.rlen = 4; + CMD_SETUP(&cmd, "\x14\x00\x01\x03\x0c\x00", 4); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; - memcpy(cmd.args, "\x85", 1); - cmd.wlen = 1; - cmd.rlen = 1; + CMD_SETUP(&cmd, "\x85", 1); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; @@ -444,26 +412,20 @@ static int si2168_init(struct dvb_frontend *fe) dev_dbg(&client->dev, "\n"); /* initialize */ - memcpy(cmd.args, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 13); - cmd.wlen = 13; - cmd.rlen = 0; + CMD_SETUP(&cmd, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 0); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; if (dev->warm) { /* resume */ - memcpy(cmd.args, "\xc0\x06\x08\x0f\x00\x20\x21\x01", 8); - cmd.wlen = 8; - cmd.rlen = 1; + CMD_SETUP(&cmd, "\xc0\x06\x08\x0f\x00\x20\x21\x01", 1); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; udelay(100); - memcpy(cmd.args, "\x85", 1); - cmd.wlen = 1; - cmd.rlen = 1; + CMD_SETUP(&cmd, "\x85", 1); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; @@ -472,9 +434,7 @@ static int si2168_init(struct dvb_frontend *fe) } /* power up */ - memcpy(cmd.args, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8); - cmd.wlen = 8; - cmd.rlen = 1; + CMD_SETUP(&cmd, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 1); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; @@ -542,17 +502,13 @@ static int si2168_init(struct dvb_frontend *fe) release_firmware(fw); - memcpy(cmd.args, "\x01\x01", 2); - cmd.wlen = 2; - cmd.rlen = 1; + CMD_SETUP(&cmd, "\x01\x01", 1); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; /* query firmware version */ - memcpy(cmd.args, "\x11", 1); - cmd.wlen = 1; - cmd.rlen = 10; + CMD_SETUP(&cmd, "\x11", 10); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; @@ -610,9 +566,7 @@ static int si2168_sleep(struct dvb_frontend *fe) if (dev->version > ('B' << 24 | 4 << 16 | 0 << 8 | 11 << 0)) dev->warm = false; - memcpy(cmd.args, "\x13", 1); - cmd.wlen = 1; - cmd.rlen = 0; + CMD_SETUP(&cmd, "\x13", 0); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; @@ -638,9 +592,7 @@ static int si2168_select(struct i2c_mux_core *muxc, u32 chan) struct si2168_cmd cmd; /* open I2C gate */ - memcpy(cmd.args, "\xc0\x0d\x01", 3); - cmd.wlen = 3; - cmd.rlen = 0; + CMD_SETUP(&cmd, "\xc0\x0d\x01", 0); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; @@ -658,9 +610,7 @@ static int si2168_deselect(struct i2c_mux_core *muxc, u32 chan) struct si2168_cmd cmd; /* close I2C gate */ - memcpy(cmd.args, "\xc0\x0d\x00", 3); - cmd.wlen = 3; - cmd.rlen = 0; + CMD_SETUP(&cmd, "\xc0\x0d\x00", 0); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err; @@ -753,25 +703,19 @@ static int si2168_probe(struct i2c_client *client, mutex_init(&dev->i2c_mutex); /* Initialize */ - memcpy(cmd.args, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 13); - cmd.wlen = 13; - cmd.rlen = 0; + CMD_SETUP(&cmd, "\xc0\x12\x00\x0c\x00\x0d\x16\x00\x00\x00\x00\x00\x00", 0); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err_kfree; /* Power up */ - memcpy(cmd.args, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 8); - cmd.wlen = 8; - cmd.rlen = 1; + CMD_SETUP(&cmd, "\xc0\x06\x01\x0f\x00\x20\x20\x01", 1); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err_kfree; /* Query chip revision */ - memcpy(cmd.args, "\x02", 1); - cmd.wlen = 1; - cmd.rlen = 13; + CMD_SETUP(&cmd, "\x02", 13); ret = si2168_cmd_execute(client, &cmd); if (ret) goto err_kfree; -- 2.17.1