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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 3C7CBC47256 for ; Sat, 2 May 2020 04:03:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 25F28208DB for ; Sat, 2 May 2020 04:03:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726787AbgEBED2 (ORCPT ); Sat, 2 May 2020 00:03:28 -0400 Received: from pbmsgap02.intersil.com ([192.157.179.202]:36262 "EHLO pbmsgap02.intersil.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726430AbgEBED2 (ORCPT ); Sat, 2 May 2020 00:03:28 -0400 X-Greylist: delayed 1633 seconds by postgrey-1.27 at vger.kernel.org; Sat, 02 May 2020 00:03:26 EDT Received: from pps.filterd (pbmsgap02.intersil.com [127.0.0.1]) by pbmsgap02.intersil.com (8.16.0.27/8.16.0.27) with SMTP id 0423WTuq012090; Fri, 1 May 2020 23:36:14 -0400 Received: from pbmxdp01.intersil.corp (pbmxdp01.pb.intersil.com [132.158.200.222]) by pbmsgap02.intersil.com with ESMTP id 30mfccke9x-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Fri, 01 May 2020 23:36:13 -0400 Received: from pbmxdp02.intersil.corp (132.158.200.223) by pbmxdp01.intersil.corp (132.158.200.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.1531.3; Fri, 1 May 2020 23:36:12 -0400 Received: from localhost (132.158.202.109) by pbmxdp02.intersil.corp (132.158.200.223) with Microsoft SMTP Server id 15.1.1531.3 via Frontend Transport; Fri, 1 May 2020 23:36:11 -0400 From: To: CC: , , , Vincent Cheng Subject: [PATCH v2 net-next 3/3] ptp: ptp_clockmatrix: Add adjphase() to support PHC write phase mode. Date: Fri, 1 May 2020 23:35:38 -0400 Message-ID: <1588390538-24589-4-git-send-email-vincent.cheng.xh@renesas.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1588390538-24589-1-git-send-email-vincent.cheng.xh@renesas.com> References: <1588390538-24589-1-git-send-email-vincent.cheng.xh@renesas.com> X-TM-AS-MML: disable MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.676 definitions=2020-05-01_18:2020-05-01,2020-05-01 signatures=0 X-Proofpoint-Spam-Details: rule=junk_notspam policy=junk score=0 suspectscore=4 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-2002250000 definitions=main-2005020027 X-Proofpoint-Spam-Reason: mlx Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Vincent Cheng Add idtcm_adjphase() to support PHC write phase mode. Signed-off-by: Vincent Cheng --- drivers/ptp/ptp_clockmatrix.c | 92 +++++++++++++++++++++++++++++++++++++++++++ drivers/ptp/ptp_clockmatrix.h | 8 +++- 2 files changed, 98 insertions(+), 2 deletions(-) diff --git a/drivers/ptp/ptp_clockmatrix.c b/drivers/ptp/ptp_clockmatrix.c index a3f6088..ceb6bc5 100644 --- a/drivers/ptp/ptp_clockmatrix.c +++ b/drivers/ptp/ptp_clockmatrix.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include @@ -24,6 +25,16 @@ MODULE_LICENSE("GPL"); #define SETTIME_CORRECTION (0) +static long set_write_phase_ready(struct ptp_clock_info *ptp) +{ + struct idtcm_channel *channel = + container_of(ptp, struct idtcm_channel, caps); + + channel->write_phase_ready = 1; + + return 0; +} + static int char_array_to_timespec(u8 *buf, u8 count, struct timespec64 *ts) @@ -871,6 +882,64 @@ static int idtcm_set_pll_mode(struct idtcm_channel *channel, /* PTP Hardware Clock interface */ +/** + * @brief Maximum absolute value for write phase offset in picoseconds + * + * Destination signed register is 32-bit register in resolution of 50ps + * + * 0x7fffffff * 50 = 2147483647 * 50 = 107374182350 + */ +static int _idtcm_adjphase(struct idtcm_channel *channel, s32 delta_ns) +{ + struct idtcm *idtcm = channel->idtcm; + + int err; + u8 i; + u8 buf[4] = {0}; + s32 phase_50ps; + s64 offset_ps; + + if (channel->pll_mode != PLL_MODE_WRITE_PHASE) { + + err = idtcm_set_pll_mode(channel, PLL_MODE_WRITE_PHASE); + + if (err) + return err; + + channel->write_phase_ready = 0; + + ptp_schedule_worker(channel->ptp_clock, + msecs_to_jiffies(WR_PHASE_SETUP_MS)); + } + + if (!channel->write_phase_ready) + delta_ns = 0; + + offset_ps = (s64)delta_ns * 1000; + + /* + * Check for 32-bit signed max * 50: + * + * 0x7fffffff * 50 = 2147483647 * 50 = 107374182350 + */ + if (offset_ps > MAX_ABS_WRITE_PHASE_PICOSECONDS) + offset_ps = MAX_ABS_WRITE_PHASE_PICOSECONDS; + else if (offset_ps < -MAX_ABS_WRITE_PHASE_PICOSECONDS) + offset_ps = -MAX_ABS_WRITE_PHASE_PICOSECONDS; + + phase_50ps = DIV_ROUND_CLOSEST(div64_s64(offset_ps, 50), 1); + + for (i = 0; i < 4; i++) { + buf[i] = phase_50ps & 0xff; + phase_50ps >>= 8; + } + + err = idtcm_write(idtcm, channel->dpll_phase, DPLL_WR_PHASE, + buf, sizeof(buf)); + + return err; +} + static int idtcm_adjfreq(struct ptp_clock_info *ptp, s32 ppb) { struct idtcm_channel *channel = @@ -977,6 +1046,24 @@ static int idtcm_adjtime(struct ptp_clock_info *ptp, s64 delta) return err; } +static int idtcm_adjphase(struct ptp_clock_info *ptp, s32 delta) +{ + struct idtcm_channel *channel = + container_of(ptp, struct idtcm_channel, caps); + + struct idtcm *idtcm = channel->idtcm; + + int err; + + mutex_lock(&idtcm->reg_lock); + + err = _idtcm_adjphase(channel, delta); + + mutex_unlock(&idtcm->reg_lock); + + return err; +} + static int idtcm_enable(struct ptp_clock_info *ptp, struct ptp_clock_request *rq, int on) { @@ -1055,13 +1142,16 @@ static const struct ptp_clock_info idtcm_caps = { .owner = THIS_MODULE, .max_adj = 244000, .n_per_out = 1, + .adjphase = &idtcm_adjphase, .adjfreq = &idtcm_adjfreq, .adjtime = &idtcm_adjtime, .gettime64 = &idtcm_gettime, .settime64 = &idtcm_settime, .enable = &idtcm_enable, + .do_aux_work = &set_write_phase_ready, }; + static int idtcm_enable_channel(struct idtcm *idtcm, u32 index) { struct idtcm_channel *channel; @@ -1146,6 +1236,8 @@ static int idtcm_enable_channel(struct idtcm *idtcm, u32 index) if (!channel->ptp_clock) return -ENOTSUPP; + channel->write_phase_ready = 0; + dev_info(&idtcm->client->dev, "PLL%d registered as ptp%d\n", index, channel->ptp_clock->index); diff --git a/drivers/ptp/ptp_clockmatrix.h b/drivers/ptp/ptp_clockmatrix.h index 6c1f93a..3de0eb7 100644 --- a/drivers/ptp/ptp_clockmatrix.h +++ b/drivers/ptp/ptp_clockmatrix.h @@ -15,6 +15,8 @@ #define FW_FILENAME "idtcm.bin" #define MAX_PHC_PLL 4 +#define MAX_ABS_WRITE_PHASE_PICOSECONDS (107374182350LL) + #define PLL_MASK_ADDR (0xFFA5) #define DEFAULT_PLL_MASK (0x04) @@ -33,8 +35,9 @@ #define POST_SM_RESET_DELAY_MS (3000) #define PHASE_PULL_IN_THRESHOLD_NS (150000) -#define TOD_WRITE_OVERHEAD_COUNT_MAX (5) -#define TOD_BYTE_COUNT (11) +#define TOD_WRITE_OVERHEAD_COUNT_MAX (5) +#define TOD_BYTE_COUNT (11) +#define WR_PHASE_SETUP_MS (5000) /* Values of DPLL_N.DPLL_MODE.PLL_MODE */ enum pll_mode { @@ -77,6 +80,7 @@ struct idtcm_channel { u16 hw_dpll_n; enum pll_mode pll_mode; u16 output_mask; + int write_phase_ready; }; struct idtcm { -- 2.7.4