From patchwork Mon Jul 1 11:44:09 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Gonzalez X-Patchwork-Id: 11025735 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1602F138D for ; Mon, 1 Jul 2019 11:44:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 052BC284E8 for ; Mon, 1 Jul 2019 11:44:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id ECC122866C; Mon, 1 Jul 2019 11:44:19 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,FREEMAIL_FROM, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DA173284E8 for ; Mon, 1 Jul 2019 11:44:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728649AbfGALoO (ORCPT ); Mon, 1 Jul 2019 07:44:14 -0400 Received: from ns.iliad.fr ([212.27.33.1]:35882 "EHLO ns.iliad.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727128AbfGALoN (ORCPT ); Mon, 1 Jul 2019 07:44:13 -0400 Received: from ns.iliad.fr (localhost [127.0.0.1]) by ns.iliad.fr (Postfix) with ESMTP id 4D56320A7E; Mon, 1 Jul 2019 13:44:10 +0200 (CEST) Received: from [192.168.108.49] (freebox.vlq16.iliad.fr [213.36.7.13]) by ns.iliad.fr (Postfix) with ESMTP id 36725204CE; Mon, 1 Jul 2019 13:44:10 +0200 (CEST) To: Antti Palosaari , Mauro Carvalho Chehab Cc: linux-media , LKML , =?utf-8?q?Jonathan_Neusch=C3=A4fer?= , Bjorn Andersson , Brad Love From: Marc Gonzalez Subject: [PATCH v1] media: si2168: Refactor command setup code Message-ID: <6a8f9a5b-2e88-8c26-440b-76af0d91eda6@free.fr> Date: Mon, 1 Jul 2019 13:44:09 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 Content-Language: en-US X-Virus-Scanned: ClamAV using ClamSMTP ; ns.iliad.fr ; Mon Jul 1 13:44:10 2019 +0200 (CEST) Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP By refactoring the command setup code, we can let the compiler determine the size of each command. Signed-off-by: Marc Gonzalez --- drivers/media/dvb-frontends/si2168.c | 142 ++++++++------------------- 1 file changed, 41 insertions(+), 101 deletions(-) diff --git a/drivers/media/dvb-frontends/si2168.c b/drivers/media/dvb-frontends/si2168.c index 168c503e9154..19398f041c79 100644 --- a/drivers/media/dvb-frontends/si2168.c +++ b/drivers/media/dvb-frontends/si2168.c @@ -11,6 +11,12 @@ static const struct dvb_frontend_ops si2168_ops; +#define CMD_SETUP(cmd, __args, __rlen) do { \ + int wlen = sizeof(__args) - 1; \ + memcpy(cmd.args, __args, wlen); \ + cmd.wlen = wlen; cmd.rlen = __rlen; \ +} while (0) + /* execute firmware command */ static int si2168_cmd_execute(struct i2c_client *client, struct si2168_cmd *cmd) { @@ -83,15 +89,13 @@ 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; @@ -115,19 +119,13 @@ 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; @@ -164,9 +162,7 @@ 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; @@ -197,9 +193,7 @@ 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; @@ -285,22 +279,18 @@ 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; @@ -317,103 +307,77 @@ 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; @@ -443,26 +407,20 @@ 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; @@ -471,9 +429,7 @@ 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; @@ -541,17 +497,13 @@ 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; @@ -609,9 +561,7 @@ 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; @@ -637,9 +587,7 @@ 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; @@ -657,9 +605,7 @@ 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; @@ -730,25 +676,19 @@ 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;