From patchwork Sun May 7 20:51:49 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Jasmin J." X-Patchwork-Id: 9715527 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9087660380 for ; Sun, 7 May 2017 22:05:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 81D47200F5 for ; Sun, 7 May 2017 22:05:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7683226C9B; Sun, 7 May 2017 22:05:19 +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=-6.9 required=2.0 tests=BAYES_00,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 D5691265B9 for ; Sun, 7 May 2017 22:05:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756703AbdEGWFQ (ORCPT ); Sun, 7 May 2017 18:05:16 -0400 Received: from mail.anw.at ([195.234.101.228]:35906 "EHLO mail.anw.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756498AbdEGWFO (ORCPT ); Sun, 7 May 2017 18:05:14 -0400 X-Greylist: delayed 595 seconds by postgrey-1.27 at vger.kernel.org; Sun, 07 May 2017 18:04:26 EDT Received: from hoppel.217.196.72.190 (anwhome.anw.at [195.234.103.23]) by mail.anw.at (8.14.4/8.14.4/Debian-4.1ubuntu1) with ESMTP id v47KpxAo023688; Sun, 7 May 2017 22:51:59 +0200 From: "Jasmin J." To: linux-media@vger.kernel.org Cc: mchehab@s-opensource.com, max.kellermann@gmail.com, rjkm@metzlerbros.de, d.scheller@gmx.net, jasmin@anw.at Subject: [PATCH 3/7] [media] dvb-core/dvb_ca_en50221.c: Add block read/write functions Date: Sun, 7 May 2017 22:51:49 +0200 Message-Id: <1494190313-18557-4-git-send-email-jasmin@anw.at> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1494190313-18557-1-git-send-email-jasmin@anw.at> References: <1494190313-18557-1-git-send-email-jasmin@anw.at> X-Antivirus: checked in 0.032sec at mail.anw.at ([195.234.102.72]) by smf-clamd v1.2.1 - http://smfs.sf.net/ 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 From: Jasmin Jessich Some lower level drivers may work better when sending blocks of data instead byte per byte. For this we need new function pointers in the dvb_ca_en50221 protocol structure (read_data, write_data) and the protocol needs to execute them, if they are defined. Block data transmission is done in all states expect LINKINIT. Signed-off-by: Ralph Metzler Signed-off-by: Daniel Scheller Signed-off-by: Jasmin Jessich --- drivers/media/dvb-core/dvb_ca_en50221.c | 117 ++++++++++++++++++-------------- drivers/media/dvb-core/dvb_ca_en50221.h | 7 ++ 2 files changed, 73 insertions(+), 51 deletions(-) diff --git a/drivers/media/dvb-core/dvb_ca_en50221.c b/drivers/media/dvb-core/dvb_ca_en50221.c index 1cdd80a..cc709c9 100644 --- a/drivers/media/dvb-core/dvb_ca_en50221.c +++ b/drivers/media/dvb-core/dvb_ca_en50221.c @@ -646,66 +646,78 @@ static int dvb_ca_en50221_read_data(struct dvb_ca_private *ca, int slot, u8 * eb } } - /* check if there is data available */ - if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) - goto exit; - if (!(status & STATUSREG_DA)) { - /* no data */ - status = 0; - goto exit; - } - - /* read the amount of data */ - if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH)) < 0) - goto exit; - bytes_read = status << 8; - if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW)) < 0) - goto exit; - bytes_read |= status; + if (ca->pub->read_data && (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_LINKINIT)) { + if (ebuf == NULL) + status = ca->pub->read_data(ca->pub, slot, buf, sizeof(buf)); + else + status = ca->pub->read_data(ca->pub, slot, buf, ecount); + if (status < 0) + return status; + bytes_read = status; + if (status == 0) + goto exit; + } else { - /* check it will fit */ - if (ebuf == NULL) { - if (bytes_read > ca->slot_info[slot].link_buf_size) { - pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the link buffer size (%i > %i)!\n", - ca->dvbdev->adapter->num, bytes_read, - ca->slot_info[slot].link_buf_size); - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; - status = -EIO; + /* check if there is data available */ + if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) goto exit; - } - if (bytes_read < 2) { - pr_err("dvb_ca adapter %d: CAM sent a buffer that was less than 2 bytes!\n", - ca->dvbdev->adapter->num); - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; - status = -EIO; + if (!(status & STATUSREG_DA)) { + /* no data */ + status = 0; goto exit; } - } else { - if (bytes_read > ecount) { - pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the ecount size!\n", - ca->dvbdev->adapter->num); - status = -EIO; + + /* read the amount of data */ + if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_SIZE_HIGH)) < 0) + goto exit; + bytes_read = status << 8; + if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_SIZE_LOW)) < 0) goto exit; + bytes_read |= status; + + /* check it will fit */ + if (ebuf == NULL) { + if (bytes_read > ca->slot_info[slot].link_buf_size) { + pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the link buffer size (%i > %i)!\n", + ca->dvbdev->adapter->num, bytes_read, ca->slot_info[slot].link_buf_size); + ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; + status = -EIO; + goto exit; + } + if (bytes_read < 2) { + pr_err("dvb_ca adapter %d: CAM sent a buffer that was less than 2 bytes!\n", + ca->dvbdev->adapter->num); + ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; + status = -EIO; + goto exit; + } + } else { + if (bytes_read > ecount) { + pr_err("dvb_ca adapter %d: CAM tried to send a buffer larger than the ecount size!\n", + ca->dvbdev->adapter->num); + status = -EIO; + goto exit; + } } - } - /* fill the buffer */ - for (i = 0; i < bytes_read; i++) { - /* read byte and check */ - if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_DATA)) < 0) - goto exit; + /* fill the buffer */ + for (i = 0; i < bytes_read; i++) { + /* read byte and check */ + if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_DATA)) < 0) + goto exit; - /* OK, store it in the buffer */ - buf[i] = status; - } + /* OK, store it in the buffer */ + buf[i] = status; + } - /* check for read error (RE should now be 0) */ - if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) - goto exit; - if (status & STATUSREG_RE) { - ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; - status = -EIO; - goto exit; + /* check for read error (RE should now be 0) */ + if ((status = ca->pub->read_cam_control(ca->pub, slot, CTRLIF_STATUS)) < 0) + goto exit; + if (status & STATUSREG_RE) { + ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_LINKINIT; + status = -EIO; + goto exit; + } } /* OK, add it to the receive buffer, or copy into external buffer if supplied */ @@ -757,6 +769,9 @@ static int dvb_ca_en50221_write_data(struct dvb_ca_private *ca, int slot, u8 * b if (bytes_write > ca->slot_info[slot].link_buf_size) return -EINVAL; + if (ca->pub->write_data && (ca->slot_info[slot].slot_state != DVB_CA_SLOTSTATE_LINKINIT)) + return ca->pub->write_data(ca->pub, slot, buf, bytes_write); + /* it is possible we are dealing with a single buffer implementation, thus if there is data available for read or if there is even a read already in progress, we do nothing but awake the kernel thread to diff --git a/drivers/media/dvb-core/dvb_ca_en50221.h b/drivers/media/dvb-core/dvb_ca_en50221.h index 1e4bbbd..82617ba 100644 --- a/drivers/media/dvb-core/dvb_ca_en50221.h +++ b/drivers/media/dvb-core/dvb_ca_en50221.h @@ -41,6 +41,8 @@ * @write_attribute_mem: function for writing attribute memory on the CAM * @read_cam_control: function for reading the control interface on the CAM * @write_cam_control: function for reading the control interface on the CAM + * @read_data: function for reading data (block mode) + * @write_data: function for writing data (block mode) * @slot_reset: function to reset the CAM slot * @slot_shutdown: function to shutdown a CAM slot * @slot_ts_enable: function to enable the Transport Stream on a CAM slot @@ -66,6 +68,11 @@ struct dvb_ca_en50221 { int (*write_cam_control)(struct dvb_ca_en50221 *ca, int slot, u8 address, u8 value); + int (*read_data)(struct dvb_ca_en50221 *ca, + int slot, u8 *ebuf, int ecount); + int (*write_data)(struct dvb_ca_en50221 *ca, + int slot, u8 *ebuf, int ecount); + int (*slot_reset)(struct dvb_ca_en50221 *ca, int slot); int (*slot_shutdown)(struct dvb_ca_en50221 *ca, int slot); int (*slot_ts_enable)(struct dvb_ca_en50221 *ca, int slot);