Message ID | 20240813-i3c_fix-v2-7-68fe4a050188@nxp.com (mailing list archive) |
---|---|
State | Superseded |
Headers | show
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Received: from PAXPR04MB9642.eurprd04.prod.outlook.com (2603:10a6:102:240::14) by AS8PR04MB8404.eurprd04.prod.outlook.com (2603:10a6:20b:3f8::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7849.22; Tue, 13 Aug 2024 15:15:42 +0000 Received: from PAXPR04MB9642.eurprd04.prod.outlook.com ([fe80::9126:a61e:341d:4b06]) by PAXPR04MB9642.eurprd04.prod.outlook.com ([fe80::9126:a61e:341d:4b06%3]) with mapi id 15.20.7849.019; Tue, 13 Aug 2024 15:15:42 +0000 From: Frank Li <Frank.Li@nxp.com> Date: Tue, 13 Aug 2024 11:15:05 -0400 Subject: [PATCH v2 07/11] i3c: master: svc: manually emit NACK/ACK for hotjoin Message-Id: <20240813-i3c_fix-v2-7-68fe4a050188@nxp.com> References: <20240813-i3c_fix-v2-0-68fe4a050188@nxp.com> In-Reply-To: <20240813-i3c_fix-v2-0-68fe4a050188@nxp.com> To: Alexandre Belloni <alexandre.belloni@bootlin.com>, Boris Brezillon <boris.brezillon@collabora.com>, Parshuram Thombare <pthombar@cadence.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Boris Brezillon <bbrezillon@kernel.org>, Arnd Bergmann <arnd@arndb.de>, Miquel Raynal <miquel.raynal@bootlin.com>, Conor Culhane <conor.culhane@silvaco.com> Cc: linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, Frank Li <Frank.Li@nxp.com> X-Mailer: b4 0.13-dev-e586c X-Developer-Signature: v=1; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-i3c" <linux-i3c-bounces@lists.infradead.org> Errors-To: linux-i3c-bounces+linux-i3c=archiver.kernel.org@lists.infradead.org |
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i3c: master: some fix and improvemnt for hotjoin
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diff --git a/drivers/i3c/master/svc-i3c-master.c b/drivers/i3c/master/svc-i3c-master.c index 5d19251238ff8..d665639523e3c 100644 --- a/drivers/i3c/master/svc-i3c-master.c +++ b/drivers/i3c/master/svc-i3c-master.c @@ -405,6 +405,24 @@ static void svc_i3c_master_nack_ibi(struct svc_i3c_master *master) master->regs + SVC_I3C_MCTRL); } +static int svc_i3c_master_handle_ibi_won(struct svc_i3c_master *master, u32 mstatus) +{ + u32 ibitype; + + ibitype = SVC_I3C_MSTATUS_IBITYPE(mstatus); + + writel(SVC_I3C_MINT_IBIWON, master->regs + SVC_I3C_MSTATUS); + + /* Hardware can't auto emit NACK for hot join and master request */ + switch (ibitype) { + case SVC_I3C_MSTATUS_IBITYPE_HOT_JOIN: + case SVC_I3C_MSTATUS_IBITYPE_MASTER_REQUEST: + svc_i3c_master_nack_ibi(master); + } + + return 0; +} + static void svc_i3c_master_ibi_work(struct work_struct *work) { struct svc_i3c_master *master = container_of(work, struct svc_i3c_master, ibi_work); @@ -1113,7 +1131,7 @@ static int svc_i3c_master_xfer(struct svc_i3c_master *master, * start. */ if (SVC_I3C_MSTATUS_IBIWON(reg)) { - writel(SVC_I3C_MINT_IBIWON, master->regs + SVC_I3C_MSTATUS); + svc_i3c_master_handle_ibi_won(master, reg); continue; }
When the address is arbitrated at send address, the hardware can auto-send NACK if it is an IBI. However, manual emission of NACK/ACK is needed for hot join or controller request events. Add help function svc_i3c_master_handle_ibi_won() to check event type and send out NACK if the event is not an IBI. Signed-off-by: Frank Li <Frank.Li@nxp.com> --- drivers/i3c/master/svc-i3c-master.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-)