From patchwork Fri Mar 19 06:27:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Jeffery X-Patchwork-Id: 404956 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, URIBL_BLOCKED, 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 4C6F8C433E9 for ; Fri, 19 Mar 2021 06:31:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1948064F70 for ; Fri, 19 Mar 2021 06:31:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233997AbhCSGas (ORCPT ); Fri, 19 Mar 2021 02:30:48 -0400 Received: from new4-smtp.messagingengine.com ([66.111.4.230]:39585 "EHLO new4-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234186AbhCSGaZ (ORCPT ); Fri, 19 Mar 2021 02:30:25 -0400 Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailnew.nyi.internal (Postfix) with ESMTP id E73E9580A7D; Fri, 19 Mar 2021 02:30:24 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute3.internal (MEProxy); Fri, 19 Mar 2021 02:30:24 -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=LKmXDb+OBH8vc rQsLHQ/uqSreIyyMcXsaq0h99thI6g=; b=G8nK0j7Uqwpon5XvV7Npcqiz3GTWF uAzeceU/Xe8OQod1XLyx/1wZAOFmXZstWmzmPWKHj7AZVKBFh1XpEacubbbf4Nwp Wuu6JeP3vvWbibyUPh5dF0+YhErZSCmqjEloTdv1hN4mrmuEZQsVlBZitXqXIX3d /5A0gpa94j9IjFopZQo7jh0AIiPckvjIqqrMYA2UPVGOH38AcknNLHWeX0IVTKbh kWknSrqT72M/Rcll+J/BuQpDaZuhPLoilb9QoYvVs+8uMbrHTxcQZtZSMxFGgoOA tKczu4nPFzTSIcbUUhXWxMgIeELNy8IN0W8dYRXLru+FFYz1WjcTW0LkA== 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=LKmXDb+OBH8vcrQsLHQ/uqSreIyyMcXsaq0h99thI6g=; b=EXHv05Ur MamlBSitCbHu1FVmgDkgath0o0S7qIHesS4QPcVr1Zj7LC5hu4xKlicy6mUVgKsg Xq8qEW1b0XwGbxKAvY0XIsU3uWvdXaZBnu54QMhSG7Co8xczxo0eAkBR9wY9PN1M NzgcgrF1xAfr/lo3hup0zci4pQroWcoWM92sFzptRHW3HQdnsFfJGUYm0JZ0J9+x 99sh0qyN8Fm2W7Yf2UjwySdhWttumOsxWJfr/YNhQR2StMikhE8QNm9+x8M/guRa EStr05v3LdBQ0i5LPu40X/xnQimciaJpPd1cP6Swjc9zQg7aijXwNDy5X0ektT7x M0+c+KCGpDiFww== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrudefjedgleeiucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucenucfjughrpefhvffufffkofgjfhgggfestdekre dtredttdenucfhrhhomheptehnughrvgifucflvghffhgvrhihuceorghnughrvgifsegr jhdrihgurdgruheqnecuggftrfgrthhtvghrnhepjefgvdevheetkeevgeegleelgfelte etjeffleffvdduudevieffgeetleevhfetnecukfhppeduudekrddvuddtrddukedurdeh heenucevlhhushhtvghrufhiiigvpeelnecurfgrrhgrmhepmhgrihhlfhhrohhmpegrnh gurhgvfiesrghjrdhiugdrrghu X-ME-Proxy: Received: from localhost.localdomain (ppp118-210-181-55.adl-adc-lon-bras34.tpg.internode.on.net [118.210.181.55]) by mail.messagingengine.com (Postfix) with ESMTPA id 5A119240057; Fri, 19 Mar 2021 02:30:19 -0400 (EDT) From: Andrew Jeffery To: openipmi-developer@lists.sourceforge.net, openbmc@lists.ozlabs.org, minyard@acm.org Cc: joel@jms.id.au, ryan_chen@aspeedtech.com, devicetree@vger.kernel.org, tmaimon77@gmail.com, linux-aspeed@lists.ozlabs.org, linux-gpio@vger.kernel.org, avifishman70@gmail.com, venture@google.com, linus.walleij@linaro.org, linux-kernel@vger.kernel.org, tali.perry1@gmail.com, robh+dt@kernel.org, lee.jones@linaro.org, chiawei_wang@aspeedtech.com, linux-arm-kernel@lists.infradead.org, benjaminfair@google.com Subject: [PATCH v2 21/21] ipmi: kcs_bmc_aspeed: Optionally apply status address Date: Fri, 19 Mar 2021 16:57:52 +1030 Message-Id: <20210319062752.145730-21-andrew@aj.id.au> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210319062752.145730-1-andrew@aj.id.au> References: <20210319062752.145730-1-andrew@aj.id.au> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org 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 | 113 +++++++++++++++++++++-------- 1 file changed, 81 insertions(+), 32 deletions(-) diff --git a/drivers/char/ipmi/kcs_bmc_aspeed.c b/drivers/char/ipmi/kcs_bmc_aspeed.c index 7334b1f51dcc..98789b837690 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) @@ -462,18 +495,18 @@ 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) @@ -509,16 +542,27 @@ 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 (WARN_ON(rc == 0)) + return -EINVAL; + + 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) @@ -527,9 +571,11 @@ 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") && @@ -547,9 +593,9 @@ 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); @@ -578,7 +624,9 @@ 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); @@ -600,7 +648,8 @@ static int aspeed_kcs_probe(struct platform_device *pdev) if (rc < 0) return rc; - 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; }