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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 0FB56C433B4 for ; Mon, 10 May 2021 06:59:18 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A595D6105A for ; Mon, 10 May 2021 06:59:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A595D6105A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=aj.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=openbmc-bounces+openbmc=archiver.kernel.org@lists.ozlabs.org Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4FdsNh34zcz3c1n for ; Mon, 10 May 2021 16:59:16 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=aj.id.au header.i=@aj.id.au header.a=rsa-sha256 header.s=fm2 header.b=WwLhv/5M; dkim=pass (2048-bit key; unprotected) header.d=messagingengine.com header.i=@messagingengine.com header.a=rsa-sha256 header.s=fm2 header.b=Q2ryXmVm; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=aj.id.au (client-ip=64.147.123.24; helo=wout1-smtp.messagingengine.com; envelope-from=andrew@aj.id.au; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=aj.id.au header.i=@aj.id.au header.a=rsa-sha256 header.s=fm2 header.b=WwLhv/5M; dkim=pass (2048-bit key; unprotected) header.d=messagingengine.com header.i=@messagingengine.com header.a=rsa-sha256 header.s=fm2 header.b=Q2ryXmVm; dkim-atps=neutral Received: from wout1-smtp.messagingengine.com (wout1-smtp.messagingengine.com [64.147.123.24]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4FdsCP2yRDz305q for ; Mon, 10 May 2021 16:51:13 +1000 (AEST) Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.west.internal (Postfix) with ESMTP id 7D9A61466; Mon, 10 May 2021 02:51:11 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute1.internal (MEProxy); Mon, 10 May 2021 02:51:11 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=aj.id.au; h=from :to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=fm2; bh=uEksTww8L4R/u CpAkitIUcTZxKsMTZ5tqxUFkBgs8uQ=; b=WwLhv/5MY8q4P6cm7tTLW/pfCg8rN 2KNKkyARQp0+7keoBJocsJNC3KxzeE2U2CSUFmSKY3jLuHA5OH3y4N9U++IYTcf6 QU9DsAAvS7q/vhVGvUZjEZ6hXJm9bbk6yB1LzLwNtee1bjtiV+VxCVNwU+//LM9R r5MaL9HdOlh0cyQwG256XevmgCZqfBuWk3TIRwyzyf+dX7YEgVrOZvT2pIwMgZ7+ ivKHN65tLCZsp305lYvk0Y1YDGDPBT/wmagb32BVXVfNQSkibRF9+0vnGAfPMY9l fj60TRG67gY3S/qzNx3Z7gDkEvpAMa9cYoJ0q01XCrR5h9kAi8zfj2VdA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:subject:to :x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm2; bh=uEksTww8L4R/uCpAkitIUcTZxKsMTZ5tqxUFkBgs8uQ=; b=Q2ryXmVm 2KtcKB0cYCH7e//E4gw1qz3HS/5v8ZaJkwlaG5t8cj172lmJbQv8iFxpksVNg8ko jZr2BnpHgnK4Y4E5Sad6XbLIB5jEGBqAKOe22IoyVtpx5SWkH+TiUNZjBnKu0GKt TxTXImftOuFAdwqsCqbzs4EgirwPzHRQ9Jq0qwGeV1qY1lFQ/vSMOfGI4qtMK5td V7vP4+nxJi0MF902cWq5nbPFcx5JrbaWbA+Q7VQyV60ayYi2uGC69thDzIQKQPfY XlM3Ne+yifIOyrg20aFQlcuU9anDoonAyfy0eeuxCHPQbAmD5UXkI1RtVG74sZlA O1BYpRTBhWXgGA== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrvdegjedguddtlecutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecunecujfgurhephffvufffkffojghfggfgsedtke ertdertddtnecuhfhrohhmpeetnhgurhgvficulfgvfhhfvghrhicuoegrnhgurhgvfies rghjrdhiugdrrghuqeenucggtffrrghtthgvrhhnpeejgfdvveehteekveeggeellefgle etteejffelffdvudduveeiffegteelvefhteenucfkphepvddtfedrheejrddvudehrdek necuvehluhhsthgvrhfuihiivgepgeenucfrrghrrghmpehmrghilhhfrhhomheprghnug hrvgifsegrjhdrihgurdgruh X-ME-Proxy:

Received: from localhost.localdomain (203-57-215-8.dyn.iinet.net.au [203.57.215.8]) by mail.messagingengine.com (Postfix) with ESMTPA; Mon, 10 May 2021 02:51:09 -0400 (EDT) From: Andrew Jeffery To: joel@jms.id.au Subject: [PATCH linux dev-5.10 v3 16/18] ipmi: kcs_bmc_aspeed: Optionally apply status address Date: Mon, 10 May 2021 16:19:53 +0930 Message-Id: <20210510064955.1704652-17-andrew@aj.id.au> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210510064955.1704652-1-andrew@aj.id.au> References: <20210510064955.1704652-1-andrew@aj.id.au> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: openbmc@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development list for OpenBMC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: openbmc@lists.ozlabs.org Errors-To: openbmc-bounces+openbmc=archiver.kernel.org@lists.ozlabs.org Sender: "openbmc" Some Aspeed KCS devices can derive the status register address from the address of the data register. As such, the address of the status register can be implicit in the configuration if desired. On the other hand, sometimes address schemes might be requested that are incompatible with the default addressing scheme. Allow these requests where possible if the devicetree specifies the status register address. Signed-off-by: Andrew Jeffery Reviewed-by: Chia-Wei Wang --- drivers/char/ipmi/kcs_bmc_aspeed.c | 110 ++++++++++++++++++++--------- 1 file changed, 78 insertions(+), 32 deletions(-) diff --git a/drivers/char/ipmi/kcs_bmc_aspeed.c b/drivers/char/ipmi/kcs_bmc_aspeed.c index 18ebdcac61f3..57f11f23bd98 100644 --- a/drivers/char/ipmi/kcs_bmc_aspeed.c +++ b/drivers/char/ipmi/kcs_bmc_aspeed.c @@ -83,6 +83,8 @@ #define LPC_STR2 0x040 #define LPC_STR3 0x044 #define LPC_HICRB 0x100 +#define LPC_HICRB_EN16LADR2 BIT(5) +#define LPC_HICRB_EN16LADR1 BIT(4) #define LPC_HICRB_IBFIE4 BIT(1) #define LPC_HICRB_LPC4E BIT(0) #define LPC_HICRC 0x104 @@ -96,6 +98,11 @@ #define LPC_IDR4 0x114 #define LPC_ODR4 0x118 #define LPC_STR4 0x11C +#define LPC_LSADR12 0x120 +#define LPC_LSADR12_LSADR2_MASK GENMASK(31, 16) +#define LPC_LSADR12_LSADR2_SHIFT 16 +#define LPC_LSADR12_LSADR1_MASK GENMASK(15, 0) +#define LPC_LSADR12_LSADR1_SHIFT 0 #define OBE_POLL_PERIOD (HZ / 2) @@ -123,7 +130,7 @@ struct aspeed_kcs_bmc { struct aspeed_kcs_of_ops { int (*get_channel)(struct platform_device *pdev); - int (*get_io_address)(struct platform_device *pdev); + int (*get_io_address)(struct platform_device *pdev, u32 addrs[2]); }; static inline struct aspeed_kcs_bmc *to_aspeed_kcs_bmc(struct kcs_bmc_device *kcs_bmc) @@ -217,38 +224,64 @@ static void aspeed_kcs_updateb(struct kcs_bmc_device *kcs_bmc, u32 reg, u8 mask, * C. KCS4 * D / C : CA4h / CA5h */ -static void aspeed_kcs_set_address(struct kcs_bmc_device *kcs_bmc, u16 addr) +static int aspeed_kcs_set_address(struct kcs_bmc_device *kcs_bmc, u32 addrs[2], int nr_addrs) { struct aspeed_kcs_bmc *priv = to_aspeed_kcs_bmc(kcs_bmc); - switch (kcs_bmc->channel) { + if (WARN_ON(nr_addrs < 1 || nr_addrs > 2)) + return -EINVAL; + + switch (priv->kcs_bmc.channel) { case 1: - regmap_update_bits(priv->map, LPC_HICR4, - LPC_HICR4_LADR12AS, 0); - regmap_write(priv->map, LPC_LADR12H, addr >> 8); - regmap_write(priv->map, LPC_LADR12L, addr & 0xFF); + regmap_update_bits(priv->map, LPC_HICR4, LPC_HICR4_LADR12AS, 0); + regmap_write(priv->map, LPC_LADR12H, addrs[0] >> 8); + regmap_write(priv->map, LPC_LADR12L, addrs[0] & 0xFF); + if (nr_addrs == 2) { + regmap_update_bits(priv->map, LPC_LSADR12, LPC_LSADR12_LSADR1_MASK, + addrs[1] << LPC_LSADR12_LSADR1_SHIFT); + + regmap_update_bits(priv->map, LPC_HICRB, LPC_HICRB_EN16LADR1, + LPC_HICRB_EN16LADR1); + } break; case 2: - regmap_update_bits(priv->map, LPC_HICR4, - LPC_HICR4_LADR12AS, LPC_HICR4_LADR12AS); - regmap_write(priv->map, LPC_LADR12H, addr >> 8); - regmap_write(priv->map, LPC_LADR12L, addr & 0xFF); + regmap_update_bits(priv->map, LPC_HICR4, LPC_HICR4_LADR12AS, LPC_HICR4_LADR12AS); + regmap_write(priv->map, LPC_LADR12H, addrs[0] >> 8); + regmap_write(priv->map, LPC_LADR12L, addrs[0] & 0xFF); + if (nr_addrs == 2) { + regmap_update_bits(priv->map, LPC_LSADR12, LPC_LSADR12_LSADR2_MASK, + addrs[1] << LPC_LSADR12_LSADR2_SHIFT); + + regmap_update_bits(priv->map, LPC_HICRB, LPC_HICRB_EN16LADR2, + LPC_HICRB_EN16LADR2); + } break; case 3: - regmap_write(priv->map, LPC_LADR3H, addr >> 8); - regmap_write(priv->map, LPC_LADR3L, addr & 0xFF); + if (nr_addrs == 2) { + dev_err(priv->kcs_bmc.dev, + "Channel 3 only supports inferred status IO address\n"); + return -EINVAL; + } + + regmap_write(priv->map, LPC_LADR3H, addrs[0] >> 8); + regmap_write(priv->map, LPC_LADR3L, addrs[0] & 0xFF); break; case 4: - regmap_write(priv->map, LPC_LADR4, ((addr + 1) << 16) | - addr); + if (nr_addrs == 1) + regmap_write(priv->map, LPC_LADR4, ((addrs[0] + 1) << 16) | addrs[0]); + else + regmap_write(priv->map, LPC_LADR4, (addrs[1] << 16) | addrs[0]); + break; default: - break; + return -EINVAL; } + + return 0; } static inline int aspeed_kcs_map_serirq_type(u32 dt_type) @@ -457,18 +490,18 @@ static int aspeed_kcs_of_v1_get_channel(struct platform_device *pdev) return channel; } -static int aspeed_kcs_of_v1_get_io_address(struct platform_device *pdev) +static int +aspeed_kcs_of_v1_get_io_address(struct platform_device *pdev, u32 addrs[2]) { - u32 slave; int rc; - rc = of_property_read_u32(pdev->dev.of_node, "kcs_addr", &slave); - if (rc || slave > 0xffff) { + rc = of_property_read_u32(pdev->dev.of_node, "kcs_addr", addrs); + if (rc || addrs[0] > 0xffff) { dev_err(&pdev->dev, "no valid 'kcs_addr' configured\n"); return -EINVAL; } - return slave; + return 1; } static int aspeed_kcs_of_v2_get_channel(struct platform_device *pdev) @@ -504,16 +537,24 @@ static int aspeed_kcs_of_v2_get_channel(struct platform_device *pdev) return -EINVAL; } -static int aspeed_kcs_of_v2_get_io_address(struct platform_device *pdev) +static int +aspeed_kcs_of_v2_get_io_address(struct platform_device *pdev, u32 addrs[2]) { - uint32_t slave; int rc; - rc = of_property_read_u32(pdev->dev.of_node, "aspeed,lpc-io-reg", &slave); - if (rc || slave > 0xffff) + rc = of_property_read_variable_u32_array(pdev->dev.of_node, + "aspeed,lpc-io-reg", + addrs, 1, 2); + if (rc < 0) + return rc; + + if (addrs[0] > 0xffff) + return -EINVAL; + + if (rc == 2 && addrs[1] > 0xffff) return -EINVAL; - return slave; + return rc; } static int aspeed_kcs_probe(struct platform_device *pdev) @@ -522,9 +563,11 @@ static int aspeed_kcs_probe(struct platform_device *pdev) struct kcs_bmc_device *kcs_bmc; struct aspeed_kcs_bmc *priv; struct device_node *np; - int rc, channel, addr; bool have_upstream_irq; u32 upstream_irq[2]; + int rc, channel; + int nr_addrs; + u32 addrs[2]; np = pdev->dev.of_node->parent; if (!of_device_is_compatible(np, "aspeed,ast2400-lpc-v2") && @@ -542,9 +585,9 @@ static int aspeed_kcs_probe(struct platform_device *pdev) if (channel < 0) return channel; - addr = ops->get_io_address(pdev); - if (addr < 0) - return addr; + nr_addrs = ops->get_io_address(pdev, addrs); + if (nr_addrs < 0) + return nr_addrs; np = pdev->dev.of_node; rc = of_property_read_u32_array(np, "aspeed,lpc-interrupts", upstream_irq, 2); @@ -573,7 +616,9 @@ static int aspeed_kcs_probe(struct platform_device *pdev) priv->obe.remove = false; timer_setup(&priv->obe.timer, aspeed_kcs_check_obe, 0); - aspeed_kcs_set_address(kcs_bmc, addr); + rc = aspeed_kcs_set_address(kcs_bmc, addrs, nr_addrs); + if (rc) + return rc; /* Host to BMC IRQ */ rc = aspeed_kcs_config_downstream_irq(kcs_bmc, pdev); @@ -596,7 +641,8 @@ static int aspeed_kcs_probe(struct platform_device *pdev) kcs_bmc_add_device(&priv->kcs_bmc); - dev_info(&pdev->dev, "Initialised channel %d at 0x%x\n", kcs_bmc->channel, addr); + dev_info(&pdev->dev, "Initialised channel %d at 0x%x\n", + kcs_bmc->channel, addrs[0]); return 0; } -- 2.27.0