From patchwork Mon Dec 9 00:40:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Glass X-Patchwork-Id: 1205810 X-Patchwork-Delegate: bmeng.cn@gmail.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de (client-ip=85.214.62.61; helo=phobos.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=chromium.org header.i=@chromium.org header.b="DLyQ6v1o"; dkim-atps=neutral Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 47WPW06thmz9sPK for ; Mon, 9 Dec 2019 11:40:44 +1100 (AEDT) Received: from phobos.denx.de (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id B79A080661; Mon, 9 Dec 2019 01:40:39 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Authentication-Results: phobos.denx.de; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=chromium.org header.i=@chromium.org header.b="DLyQ6v1o"; dkim-atps=neutral Received: by phobos.denx.de (Postfix, from userid 109) id 80870808E5; Mon, 9 Dec 2019 01:40:38 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on phobos.denx.de X-Spam-Level: X-Spam-Status: No, score=-0.1 required=5.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,SPF_HELO_NONE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.2 Received: from mail-io1-xd43.google.com (mail-io1-xd43.google.com [IPv6:2607:f8b0:4864:20::d43]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id 7E28F80417 for ; Mon, 9 Dec 2019 01:40:35 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=sjg@chromium.org Received: by mail-io1-xd43.google.com with SMTP id i11so12883535ioi.12 for ; Sun, 08 Dec 2019 16:40:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=CqfleGKV0Eeqge/OR5jRNApVQhWaa7mbVQiFVbjQiTY=; b=DLyQ6v1oNmxNEWgqAlFFUbfYcxwABG0f1117Q76X6pErEy6R3cLyvYk4hNc73hnUTy 7jb72Hhj4Yi0X0AMTfKmmsI0RVev1FwMokLhXTJ28Rtoj+TYH8V3GE2Dx5i3WiELscLd E0I4zMFqMbN43z3rW+7VHcQe7by2XRZnX+pkk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=CqfleGKV0Eeqge/OR5jRNApVQhWaa7mbVQiFVbjQiTY=; b=LosX3Oc67nuJ8hJ8Akho714D1iuIiN3buUoVtCA9yZT04OPoZklEfps8XMKxw+hqG+ ZAKxCb5S+v9H/9qLqmOd3uv2jVff+UpWXWg7jPSHuwAXLP6U0ifGAeg2isNDMMGar3MF UNa65MWc6MQToVROAJT58agg9arUheYPbq4Td44leSuCUlH7NnGOXx3lkZp4Lo+xx418 K/PaOINn5bTw0KqwOBYvn3A+sYNJ17yC3lm2vIto8lIYnIrQh0Ol19YBxxHN8dnS/Nzo NuMS0RFV7h7gGsAv+QI+csDlS8xGutRBPm78+vuGwIoNgbJ5XAKhwildFv00Wl9+Z9em aPoA== X-Gm-Message-State: APjAAAVgTGsl/3fF15dx+zijW9kRk86r+/BdIbXGpKG6O/rzedfhPxKM WSsAx1c5ZO1zt4LmJWFKqG/xSUiCYI0= X-Google-Smtp-Source: APXvYqz0vLBnAD/wGhXGxUWnTcP8uNsDhPx55atabyQyA7PHUZ78I4ly5lKeKbhTc5osQKwgJ628jg== X-Received: by 2002:a05:6602:235b:: with SMTP id r27mr19437192iot.51.1575852034053; Sun, 08 Dec 2019 16:40:34 -0800 (PST) Received: from kiwi.bld.corp.google.com ([2620:15c:183:0:8223:87c:a681:66aa]) by smtp.gmail.com with ESMTPSA id n3sm6286212ilm.74.2019.12.08.16.40.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 08 Dec 2019 16:40:33 -0800 (PST) From: Simon Glass To: U-Boot Mailing List Subject: [PATCH v7 04/17] x86: apl: Add hostbridge driver Date: Sun, 8 Dec 2019 17:40:07 -0700 Message-Id: <20191208173929.v7.4.I5ba86662e42269ac50c05b6db34832a966dad79a@changeid> X-Mailer: git-send-email 2.24.0.393.g34dc348eaf-goog MIME-Version: 1.0 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.26 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.101.4 at phobos.denx.de X-Virus-Status: Clean This driver models the hostbridge as a northbridge. It simply sets up the graphics BAR. It supports of-platdata. Signed-off-by: Simon Glass Reviewed-by: Bin Meng --- Changes in v7: None Changes in v6: - Fix comments for struct apl_hostbridge_platdata Changes in v5: None Changes in v4: - Avoid needing to know internals of pinctrl in this driver - Move code to pinctrl driver - Switch over to use pinctrl for pad init/config Changes in v3: - Move pad programming into the hostbridge to reduce TPL device-tree size - Use pci_get_devfn() Changes in v2: None arch/x86/cpu/apollolake/Makefile | 1 + arch/x86/cpu/apollolake/hostbridge.c | 179 +++++++++++++++++++++++++++ 2 files changed, 180 insertions(+) create mode 100644 arch/x86/cpu/apollolake/hostbridge.c diff --git a/arch/x86/cpu/apollolake/Makefile b/arch/x86/cpu/apollolake/Makefile index 3a8c2f66a3..4d3c08f84e 100644 --- a/arch/x86/cpu/apollolake/Makefile +++ b/arch/x86/cpu/apollolake/Makefile @@ -4,5 +4,6 @@ obj-$(CONFIG_SPL_BUILD) += systemagent.o +obj-y += hostbridge.o obj-y += pmc.o obj-y += uart.o diff --git a/arch/x86/cpu/apollolake/hostbridge.c b/arch/x86/cpu/apollolake/hostbridge.c new file mode 100644 index 0000000000..793853d5b5 --- /dev/null +++ b/arch/x86/cpu/apollolake/hostbridge.c @@ -0,0 +1,179 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 Google LLC + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +/** + * struct apl_hostbridge_platdata - platform data for hostbridge + * + * @dtplat: Platform data for of-platdata + * @early_pads: Early pad data to set up, each (pad, cfg0, cfg1) + * @early_pads_count: Number of pads to process + * @pciex_region_size: BAR length in bytes + * @bdf: Bus/device/function of hostbridge + */ +struct apl_hostbridge_platdata { +#if CONFIG_IS_ENABLED(OF_PLATDATA) + struct dtd_intel_apl_hostbridge dtplat; +#endif + u32 *early_pads; + int early_pads_count; + uint pciex_region_size; + pci_dev_t bdf; +}; + +enum { + PCIEXBAR = 0x60, + PCIEXBAR_LENGTH_256MB = 0, + PCIEXBAR_LENGTH_128MB, + PCIEXBAR_LENGTH_64MB, + + PCIEXBAR_PCIEXBAREN = 1 << 0, + + TSEG = 0xb8, /* TSEG base */ +}; + +static int apl_hostbridge_early_init_pinctrl(struct udevice *dev) +{ + struct apl_hostbridge_platdata *plat = dev_get_platdata(dev); + struct udevice *pinctrl; + int ret; + + ret = uclass_first_device_err(UCLASS_PINCTRL, &pinctrl); + if (ret) + return log_msg_ret("no hostbridge pinctrl", ret); + + return pinctrl_config_pads(pinctrl, plat->early_pads, + plat->early_pads_count); +} + +static int apl_hostbridge_early_init(struct udevice *dev) +{ + struct apl_hostbridge_platdata *plat = dev_get_platdata(dev); + u32 region_size; + ulong base; + u32 reg; + int ret; + + /* Set up the MCHBAR */ + pci_x86_read_config(plat->bdf, MCHBAR, &base, PCI_SIZE_32); + base = MCH_BASE_ADDRESS; + pci_x86_write_config(plat->bdf, MCHBAR, base | 1, PCI_SIZE_32); + + /* + * The PCIEXBAR is assumed to live in the memory mapped IO space under + * 4GiB + */ + pci_x86_write_config(plat->bdf, PCIEXBAR + 4, 0, PCI_SIZE_32); + + switch (plat->pciex_region_size >> 20) { + default: + case 256: + region_size = PCIEXBAR_LENGTH_256MB; + break; + case 128: + region_size = PCIEXBAR_LENGTH_128MB; + break; + case 64: + region_size = PCIEXBAR_LENGTH_64MB; + break; + } + + reg = CONFIG_MMCONF_BASE_ADDRESS | (region_size << 1) + | PCIEXBAR_PCIEXBAREN; + pci_x86_write_config(plat->bdf, PCIEXBAR, reg, PCI_SIZE_32); + + /* + * TSEG defines the base of SMM range. BIOS determines the base + * of TSEG memory which must be at or below Graphics base of GTT + * Stolen memory, hence its better to clear TSEG register early + * to avoid power on default non-zero value (if any). + */ + pci_x86_write_config(plat->bdf, TSEG, 0, PCI_SIZE_32); + + ret = apl_hostbridge_early_init_pinctrl(dev); + if (ret) + return log_msg_ret("pinctrl", ret); + + return 0; +} + +static int apl_hostbridge_ofdata_to_platdata(struct udevice *dev) +{ + struct apl_hostbridge_platdata *plat = dev_get_platdata(dev); + struct udevice *pinctrl; + int ret; + + /* + * The host bridge holds the early pad data needed to get through TPL. + * This is a small amount of data, enough to fit in TPL, so we keep it + * separate from the full pad data, stored in the fsp-s subnode. That + * subnode is not present in TPL, to save space. + */ + ret = uclass_first_device_err(UCLASS_PINCTRL, &pinctrl); + if (ret) + return log_msg_ret("no hostbridge PINCTRL", ret); +#if !CONFIG_IS_ENABLED(OF_PLATDATA) + int root; + + /* Get length of PCI Express Region */ + plat->pciex_region_size = dev_read_u32_default(dev, "pciex-region-size", + 256 << 20); + + root = pci_get_devfn(dev); + if (root < 0) + return log_msg_ret("Cannot get host-bridge PCI address", root); + plat->bdf = root; + + ret = pinctrl_read_pads(pinctrl, dev_ofnode(dev), "early-pads", + &plat->early_pads, &plat->early_pads_count); + if (ret) + return log_msg_ret("early-pads", ret); +#else + struct dtd_intel_apl_hostbridge *dtplat = &plat->dtplat; + int size; + + plat->pciex_region_size = dtplat->pciex_region_size; + plat->bdf = pci_ofplat_get_devfn(dtplat->reg[0]); + + /* Assume that if everything is 0, it is empty */ + plat->early_pads = dtplat->early_pads; + size = ARRAY_SIZE(dtplat->early_pads); + plat->early_pads_count = pinctrl_count_pads(pinctrl, plat->early_pads, + size); + +#endif + + return 0; +} + +static int apl_hostbridge_probe(struct udevice *dev) +{ + if (spl_phase() == PHASE_TPL) + return apl_hostbridge_early_init(dev); + + return 0; +} + +static const struct udevice_id apl_hostbridge_ids[] = { + { .compatible = "intel,apl-hostbridge" }, + { } +}; + +U_BOOT_DRIVER(apl_hostbridge_drv) = { + .name = "intel_apl_hostbridge", + .id = UCLASS_NORTHBRIDGE, + .of_match = apl_hostbridge_ids, + .ofdata_to_platdata = apl_hostbridge_ofdata_to_platdata, + .probe = apl_hostbridge_probe, + .platdata_auto_alloc_size = sizeof(struct apl_hostbridge_platdata), +};