From nobody Fri Dec 19 20:54:48 2025 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 9FDA21A23B1 for ; Mon, 30 Dec 2024 09:31:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735551086; cv=none; b=ByFGp+6uUO3Josla7LWXlYUV+upYlSdp1cjhBxlBmj+wTq+Jj159Ct5wu8zX+ppuHREQdcjD81iTqsjICTvgVNZKaj/X9G7s5isWqekoZh8UoMF+miRmSY8jWHzqkau6PHRJo3mvIgpZ1qY9ysQ97eRDhrzgdGWccxedyHSFlb8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735551086; c=relaxed/simple; bh=Q7LzPmcoeSwIbMinzQKXPqJsaFsmJP9+QsXs8KW/x4E=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=kUKtPkYmNKfLqJPqVRXg5iiRNzpmpHxNWTFbCm+hdI407Ovi//HXwwatDKfawi/TXcy0yGqZVyOwb/GAK7n6Lcc8HepsiBxBdlaKWDyTlyXzQoXq+PrCFOfIW92M4YuujsW9Q+FgLezDw55pyvpYD0LTPk0OZB+OAskLf8POHic= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [223.64.68.63]) by gateway (Coremail) with SMTP id _____8CxPuNoaHJnEM9bAA--.48440S3; Mon, 30 Dec 2024 17:31:20 +0800 (CST) Received: from localhost.localdomain (unknown [223.64.68.63]) by front1 (Coremail) with SMTP id qMiowMCxncVkaHJnp74NAA--.4295S3; Mon, 30 Dec 2024 17:31:18 +0800 (CST) From: Binbin Zhou To: Binbin Zhou , Huacai Chen , Lee Jones , Corey Minyard , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter Cc: Huacai Chen , linux-kernel@vger.kernel.org, openipmi-developer@lists.sourceforge.net, dri-devel@lists.freedesktop.org, Xuerui Wang , loongarch@lists.linux.dev, Binbin Zhou , Chong Qiao Subject: [PATCH v1 1/4] mfd: ls2kbmc: Introduce Loongson-2K BMC MFD Core driver Date: Mon, 30 Dec 2024 17:31:08 +0800 Message-ID: <074e91224f0e48861e11954dc80c92de322906a2.1735550269.git.zhoubinbin@loongson.cn> X-Mailer: git-send-email 2.43.5 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowMCxncVkaHJnp74NAA--.4295S3 X-CM-SenderInfo: p2kr3uplqex0o6or00hjvr0hdfq/ X-Coremail-Antispam: 1Uk129KBj93XoW3XrykWrWDAw1kJr4xKFWDJrc_yoW7uw43pF n3Jay5CF4kXF47GrsxWr1UCFsxua9Yya4jqrsrJ34avayay34UZ348tF9xZryDGryq9ry7 tFWYyw1jkFs8JabCm3ZEXasCq-sJn29KB7ZKAUJUUUUD529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUBIb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r126r13M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVCY1x0267AK xVW8Jr0_Cr1UM2kKe7AKxVWUAVWUtwAS0I0E0xvYzxvE52x082IY62kv0487Mc804VCY07 AIYIkI8VC2zVCFFI0UMc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWU tVWrXwAv7VC2z280aVAFwI0_Gr0_Cr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7V AKI48JMxkF7I0En4kS14v26r1q6r43MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY 6r1j6r4UMxCIbckI1I0E14v26r126r1DMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7 xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVW8ZVWrXwCIc40Y0x0EwIxGrwCI42IY6xII jxv20xvE14v26r4j6ryUMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwCI42IY6xAIw2 0EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Gr0_Cr1lIxAIcVC2z280aVCY1x02 67AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7IU8BuWPUUUUU== Content-Type: text/plain; charset="utf-8" The Loongson-2K Board Management Controller provides an PCIe interface to the host to access the feature implemented in the BMC. The BMC is assembled on a server similar to the server machine with Loongson-3C6000 CPUs. It supports multiple sub-devices like DRM. Co-developed-by: Chong Qiao Signed-off-by: Chong Qiao Signed-off-by: Binbin Zhou --- drivers/mfd/Kconfig | 15 ++++ drivers/mfd/Makefile | 2 + drivers/mfd/ls2kbmc-mfd.c | 145 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 162 insertions(+) create mode 100644 drivers/mfd/ls2kbmc-mfd.c diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index ae23b317a64e..97d9d52b7e8a 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -2414,5 +2414,20 @@ config MFD_RSMU_SPI Additional drivers must be enabled in order to use the functionality of the device. =20 +config MFD_LS2K_BMC + tristate "Loongson-2K Board Management Controller Support" + depends on LOONGARCH + select MFD_CORE + help + Say yes here to add support for the Loongson-2K BMC + which is a Board Management Controller connected to the PCIe bus. + The device supports multiple sub-devices like DRM. + This driver provides common support for accessing the devices; + additional drivers must be enabled in order to use the + functionality of the BMC device. + + This driver can also be built as a module. If so the module + will be called ls2kbmc-mfd. + endmenu endif diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index e057d6d6faef..3faec9638303 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -290,3 +290,5 @@ obj-$(CONFIG_MFD_ATC260X_I2C) +=3D atc260x-i2c.o =20 obj-$(CONFIG_MFD_RSMU_I2C) +=3D rsmu_i2c.o rsmu_core.o obj-$(CONFIG_MFD_RSMU_SPI) +=3D rsmu_spi.o rsmu_core.o + +obj-$(CONFIG_MFD_LS2K_BMC) +=3D ls2kbmc-mfd.o diff --git a/drivers/mfd/ls2kbmc-mfd.c b/drivers/mfd/ls2kbmc-mfd.c new file mode 100644 index 000000000000..2912112c41c8 --- /dev/null +++ b/drivers/mfd/ls2kbmc-mfd.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Loongson-2K Board Management Controller (BMC) MFD Core Driver. + * + * Copyright (C) 2024 Loongson Technology Corporation Limited. + * + * Originally written by Chong Qiao + * Rewritten for mainline by Binbin Zhou + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +static struct resource ls2k_display_resources[] =3D { + { + .name =3D "ls2kbmc-simplebuf-res", + .start =3D SZ_16M + SZ_2M, + .end =3D SZ_16M + SZ_2M + SZ_4M - 1, + .flags =3D IORESOURCE_MEM, + }, +}; + +static struct resource ls2k_ipmi0_resources[] =3D { + { + .name =3D "ipmi-res0", + .start =3D SZ_16M + 0x00f00000, + .end =3D SZ_16M + 0x00f00000 + 0x1c - 1, + .flags =3D IORESOURCE_MEM, + }, +}; + +static struct resource ls2k_ipmi1_resources[] =3D { + { + .name =3D "ipmi-res1", + .start =3D SZ_16M + 0x00f00000 + 0x1c, + .end =3D SZ_16M + 0x00f00000 + 0x1c * 2 - 1, + .flags =3D IORESOURCE_MEM, + }, +}; + +static struct resource ls2k_ipmi2_resources[] =3D { + { + .name =3D "ipmi-res2", + .start =3D SZ_16M + 0x00f00000 + 0x1c * 2, + .end =3D SZ_16M + 0x00f00000 + 0x1c * 3 - 1, + .flags =3D IORESOURCE_MEM, + }, +}; + +static struct resource ls2k_ipmi3_resources[] =3D { + { + .name =3D "ipmi-res3", + .start =3D SZ_16M + 0x00f00000 + 0x1c * 3, + .end =3D SZ_16M + 0x00f00000 + 0x1c * 4 - 1, + .flags =3D IORESOURCE_MEM, + }, +}; + +static struct resource ls2k_ipmi4_resources[] =3D { + { + .name =3D "ipmi-res4", + .start =3D SZ_16M + 0x00f00000 + 0x1c * 4, + .end =3D SZ_16M + 0x00f00000 + 0x1c * 5 - 1, + .flags =3D IORESOURCE_MEM, + }, +}; + +static struct mfd_cell ls2k_bmc_cells[] =3D { + { + .name =3D "ls2kbmc-framebuffer", + .num_resources =3D ARRAY_SIZE(ls2k_display_resources), + .resources =3D ls2k_display_resources, + }, + { + .name =3D "ls2k-ipmi-si", + .num_resources =3D ARRAY_SIZE(ls2k_ipmi0_resources), + .resources =3D ls2k_ipmi0_resources, + }, + { + .name =3D "ls2k-ipmi-si", + .num_resources =3D ARRAY_SIZE(ls2k_ipmi1_resources), + .resources =3D ls2k_ipmi1_resources, + }, + { + .name =3D "ls2k-ipmi-si", + .num_resources =3D ARRAY_SIZE(ls2k_ipmi2_resources), + .resources =3D ls2k_ipmi2_resources, + }, + { + .name =3D "ls2k-ipmi-si", + .num_resources =3D ARRAY_SIZE(ls2k_ipmi3_resources), + .resources =3D ls2k_ipmi3_resources, + }, + { + .name =3D "ls2k-ipmi-si", + .num_resources =3D ARRAY_SIZE(ls2k_ipmi4_resources), + .resources =3D ls2k_ipmi4_resources, + }, +}; + +static int ls2k_bmc_probe(struct pci_dev *dev, const struct pci_device_id = *id) +{ + int ret =3D 0; + + ret =3D pci_enable_device(dev); + if (ret) + return ret; + + ls2k_bmc_cells[0].platform_data =3D &dev; + ls2k_bmc_cells[0].pdata_size =3D sizeof(dev); + + return devm_mfd_add_devices(&dev->dev, PLATFORM_DEVID_AUTO, + ls2k_bmc_cells, ARRAY_SIZE(ls2k_bmc_cells), + &dev->resource[0], 0, NULL); +} + +static void ls2k_bmc_remove(struct pci_dev *dev) +{ + pci_disable_device(dev); +} + +static struct pci_device_id ls2k_bmc_devices[] =3D { + { PCI_DEVICE(PCI_VENDOR_ID_LOONGSON, 0x1a05) }, + { } +}; +MODULE_DEVICE_TABLE(pci, ls2k_bmc_devices); + +static struct pci_driver ls2k_bmc_driver =3D { + .name =3D "ls2k-bmc", + .id_table =3D ls2k_bmc_devices, + .probe =3D ls2k_bmc_probe, + .remove =3D ls2k_bmc_remove, +}; + +module_pci_driver(ls2k_bmc_driver); + +MODULE_DESCRIPTION("Loongson-2K BMC driver"); +MODULE_AUTHOR("Loongson Technology Corporation Limited"); +MODULE_LICENSE("GPL"); --=20 2.43.5