From patchwork Fri Nov 11 05:42:00 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinbo Zhu X-Patchwork-Id: 13039690 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8E299C4332F for ; Fri, 11 Nov 2022 05:42:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) id 62590C4347C; Fri, 11 Nov 2022 05:42:16 +0000 (UTC) Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.kernel.org (Postfix) with ESMTP id 6C7C9C433C1; Fri, 11 Nov 2022 05:42:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 smtp.kernel.org 6C7C9C433C1 Authentication-Results: smtp.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [10.180.13.64]) by gateway (Coremail) with SMTP id _____8Dx_Niy4G1jQwUGAA--.18714S3; Fri, 11 Nov 2022 13:42:10 +0800 (CST) Received: from localhost.localdomain (unknown [10.180.13.64]) by localhost.localdomain (Coremail) with SMTP id AQAAf8DxLeCs4G1jrq4QAA--.45491S2; Fri, 11 Nov 2022 13:42:08 +0800 (CST) From: Yinbo Zhu List-Id: To: Rob Herring , Krzysztof Kozlowski , Arnd Bergmann , Hector Martin , Lubomir Rintel , Conor Dooley , Linus Walleij , Hitomi Hasegawa , Heiko Stuebner , Brian Norris , Sven Peter , loongarch@lists.linux.dev, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, soc@kernel.org, Yinbo Zhu Subject: [PATCH v7 1/2] soc: loongson: add GUTS driver for loongson-2 platforms Date: Fri, 11 Nov 2022 13:42:00 +0800 Message-Id: <20221111054201.18528-1-zhuyinbo@loongson.cn> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-CM-TRANSID: AQAAf8DxLeCs4G1jrq4QAA--.45491S2 X-CM-SenderInfo: 52kx5xhqerqz5rrqw2lrqou0/ X-Coremail-Antispam: 1Uk129KBjvJXoWfJFW5tFW5KF4rur1xuryDJrb_yoWDWw15pa 1fCa4rGrWUJF45urs8Ja48WFyY9as7Ca9xZF4Igwn8urykA34UXasrJFyUZrs7AryDA342 qF95C3yjkFWUA3DanT9S1TB71UUUUUDqnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU b7xFc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wAFIxvE14AKwVWUXVWUAwA2ocxC64 kIII0Yj41l84x0c7CEw4AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26r1j6r1xM28E F7xvwVC0I7IYx2IY6xkF7I0E14v26r1j6r4UM28EF7xvwVC2z280aVAFwI0_Gr1j6F4UJw A2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_Gr1j6F4UJwAS0I0E0xvYzxvE52x082IY62kv0487 Mc804VCY07AIYIkI8VC2zVCFFI0UMc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2 IY67AKxVWUXVWUAwAv7VC2z280aVAFwI0_Gr0_Cr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0 Y48IcxkI7VAKI48JMxAIw28IcxkI7VAKI48JMxAIw28IcVCjz48v1sIEY20_WwCFx2IqxV CFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r10 6r1rMI8E67AF67kF1VAFwI0_GFv_WrylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxV WUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Jr0_Gr1lIxAIcVCF04k26cxKx2IYs7xG 6r1j6r1xMIIF0xvEx4A2jsIE14v26r4j6F4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr 1UYxBIdaVFxhVjvjDU0xZFpf9x07j8pnQUUUUU= The global utilities block controls PCIE device enabling, alternate function selection for multiplexed signals, consistency of HDA, USB and PCIE, configuration of memory controller, rtc controller, lio controller, and clock control. This patch adds a driver to manage and access global utilities block for LoongArch architecture Loongson-2 SoCs. Initially only reading SVR and registering soc device are supported. Other guts accesses, such as reading firmware configuration by default, should eventually be added into this driver as well. Signed-off-by: Yinbo Zhu Reviewed-by: Arnd Bergmann --- Change in v7: 1. Replace LA/loongarch with LoongArch. 2. Replace PMON with firmware. 3. Add MODULE_LICENSE and MODULE_DESCRIPTION in driver ending. Change in v6: 1. Add full name spelling about GUTS in Kconfig. 2. Add reviewed-by information. Change in v5: 1. Add all history change log information. Change in v4: 1. Remove menu information in Kconfig. Change in v3: 1. Replace string loongson2/Loongson2 with Loongson-2/loongson-2 in commit message, Kconfig, Makefile file. 2. Replace string LOONGSON2 with LOONGSON-2. Change in v2: 1. Add architecture support commit log description. 2. Add other guts accesses plan commit log description. 3. Add "depends on LOONGARCH || COMPILE_TEST" for LOONGSON2_GUTS in Kconfig. 4. Move the scfg_guts to .c file from .h and delete .h. 5. Remove __packed on scfg_guts. MAINTAINERS | 6 + drivers/soc/Kconfig | 1 + drivers/soc/Makefile | 1 + drivers/soc/loongson/Kconfig | 18 +++ drivers/soc/loongson/Makefile | 6 + drivers/soc/loongson/loongson2_guts.c | 192 ++++++++++++++++++++++++++ 6 files changed, 224 insertions(+) create mode 100644 drivers/soc/loongson/Kconfig create mode 100644 drivers/soc/loongson/Makefile create mode 100644 drivers/soc/loongson/loongson2_guts.c diff --git a/MAINTAINERS b/MAINTAINERS index c4fc50eb260b..99aa2cb9c80a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12044,6 +12044,12 @@ S: Maintained F: Documentation/devicetree/bindings/pinctrl/loongson,ls2k-pinctrl.yaml F: drivers/pinctrl/pinctrl-loongson2.c +LOONGSON-2 SOC SERIES GUTS DRIVER +M: Yinbo Zhu +L: loongarch@lists.linux.dev +S: Maintained +F: drivers/soc/loongson/loongson2_guts.c + LSILOGIC MPT FUSION DRIVERS (FC/SAS/SPI) M: Sathya Prakash M: Sreekanth Reddy diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig index e461c071189b..5dbb09f843f7 100644 --- a/drivers/soc/Kconfig +++ b/drivers/soc/Kconfig @@ -13,6 +13,7 @@ source "drivers/soc/fujitsu/Kconfig" source "drivers/soc/imx/Kconfig" source "drivers/soc/ixp4xx/Kconfig" source "drivers/soc/litex/Kconfig" +source "drivers/soc/loongson/Kconfig" source "drivers/soc/mediatek/Kconfig" source "drivers/soc/microchip/Kconfig" source "drivers/soc/pxa/Kconfig" diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile index 69ba6508cf2c..fff513bd522d 100644 --- a/drivers/soc/Makefile +++ b/drivers/soc/Makefile @@ -18,6 +18,7 @@ obj-y += imx/ obj-y += ixp4xx/ obj-$(CONFIG_SOC_XWAY) += lantiq/ obj-$(CONFIG_LITEX_SOC_CONTROLLER) += litex/ +obj-y += loongson/ obj-y += mediatek/ obj-y += microchip/ obj-y += pxa/ diff --git a/drivers/soc/loongson/Kconfig b/drivers/soc/loongson/Kconfig new file mode 100644 index 000000000000..707f56358dc4 --- /dev/null +++ b/drivers/soc/loongson/Kconfig @@ -0,0 +1,18 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# Loongson-2 series SoC drivers +# + +config LOONGSON2_GUTS + tristate "Loongson-2 SoC Global UtiliTieS (GUTS) register block" + depends on LOONGARCH || COMPILE_TEST + select SOC_BUS + help + The global utilities block controls PCIE device enabling, alternate + function selection for multiplexed signals, consistency of HDA, USB + and PCIE, configuration of memory controller, rtc controller, lio + controller, and clock control. This patch adds a driver to manage + and access global utilities block for LoongArch architecture Loongson-2 + SoCs. Initially only reading SVR and registering soc device are + supported. Other guts accesses, such as reading firmware configuration + by default, should eventually be added into this driver as well. diff --git a/drivers/soc/loongson/Makefile b/drivers/soc/loongson/Makefile new file mode 100644 index 000000000000..263c486df638 --- /dev/null +++ b/drivers/soc/loongson/Makefile @@ -0,0 +1,6 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# Makefile for the Linux Kernel SoC Loongson-2 specific device drivers +# + +obj-$(CONFIG_LOONGSON2_GUTS) += loongson2_guts.o diff --git a/drivers/soc/loongson/loongson2_guts.c b/drivers/soc/loongson/loongson2_guts.c new file mode 100644 index 000000000000..bace4bc8e03b --- /dev/null +++ b/drivers/soc/loongson/loongson2_guts.c @@ -0,0 +1,192 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Author: Yinbo Zhu + * Copyright (C) 2022-2023 Loongson Technology Corporation Limited + */ + +#include +#include +#include +#include +#include +#include +#include + +static struct soc_device_attribute soc_dev_attr; +static struct soc_device *soc_dev; + +/* + * Global Utility Registers. + * + * Not all registers defined in this structure are available on all chips, so + * you are expected to know whether a given register actually exists on your + * chip before you access it. + * + * Also, some registers are similar on different chips but have slightly + * different names. In these cases, one name is chosen to avoid extraneous + * #ifdefs. + */ +struct scfg_guts { + u32 svr; /* Version Register */ + u8 res0[4]; + u16 feature; /* Feature Register */ + u32 vendor; /* Vendor Register */ + u8 res1[6]; + u32 id; + u8 res2[0x3ff8 - 0x18]; + u32 chip; +}; + +static struct guts { + struct scfg_guts __iomem *regs; + bool little_endian; +} *guts; + +struct loongson2_soc_die_attr { + char *die; + u32 svr; + u32 mask; +}; + +/* SoC die attribute definition for Loongson-2 platform */ +static const struct loongson2_soc_die_attr loongson2_soc_die[] = { + + /* + * LoongArch-based SoCs Loongson-2 Series + */ + + /* Die: 2k1000, SoC: 2k1000 */ + { .die = "2K1000", + .svr = 0x00000013, + .mask = 0x000000ff, + }, + { }, +}; + +static const struct loongson2_soc_die_attr *loongson2_soc_die_match( + u32 svr, const struct loongson2_soc_die_attr *matches) +{ + while (matches->svr) { + if (matches->svr == (svr & matches->mask)) + return matches; + matches++; + }; + + return NULL; +} + +static u32 loongson2_guts_get_svr(void) +{ + u32 svr = 0; + + if (!guts || !guts->regs) + return svr; + + if (guts->little_endian) + svr = ioread32(&guts->regs->svr); + else + svr = ioread32be(&guts->regs->svr); + + return svr; +} + +static int loongson2_guts_probe(struct platform_device *pdev) +{ + struct device_node *root, *np = pdev->dev.of_node; + struct device *dev = &pdev->dev; + struct resource *res; + const struct loongson2_soc_die_attr *soc_die; + const char *machine; + u32 svr; + + /* Initialize guts */ + guts = devm_kzalloc(dev, sizeof(*guts), GFP_KERNEL); + if (!guts) + return -ENOMEM; + + guts->little_endian = of_property_read_bool(np, "little-endian"); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + guts->regs = ioremap(res->start, res->end - res->start + 1); + if (IS_ERR(guts->regs)) + return PTR_ERR(guts->regs); + + /* Register soc device */ + root = of_find_node_by_path("/"); + if (of_property_read_string(root, "model", &machine)) + of_property_read_string_index(root, "compatible", 0, &machine); + of_node_put(root); + if (machine) + soc_dev_attr.machine = devm_kstrdup(dev, machine, GFP_KERNEL); + + svr = loongson2_guts_get_svr(); + soc_die = loongson2_soc_die_match(svr, loongson2_soc_die); + if (soc_die) { + soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL, + "Loongson %s", soc_die->die); + } else { + soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL, "Loongson"); + } + if (!soc_dev_attr.family) + return -ENOMEM; + soc_dev_attr.soc_id = devm_kasprintf(dev, GFP_KERNEL, + "svr:0x%08x", svr); + if (!soc_dev_attr.soc_id) + return -ENOMEM; + soc_dev_attr.revision = devm_kasprintf(dev, GFP_KERNEL, "%d.%d", + (svr >> 4) & 0xf, svr & 0xf); + if (!soc_dev_attr.revision) + return -ENOMEM; + + soc_dev = soc_device_register(&soc_dev_attr); + if (IS_ERR(soc_dev)) + return PTR_ERR(soc_dev); + + pr_info("Machine: %s\n", soc_dev_attr.machine); + pr_info("SoC family: %s\n", soc_dev_attr.family); + pr_info("SoC ID: %s, Revision: %s\n", + soc_dev_attr.soc_id, soc_dev_attr.revision); + + return 0; +} + +static int loongson2_guts_remove(struct platform_device *dev) +{ + soc_device_unregister(soc_dev); + + return 0; +} + +/* + * Table for matching compatible strings, for device tree + * guts node, for Loongson-2 SoCs. + */ +static const struct of_device_id loongson2_guts_of_match[] = { + { .compatible = "loongson,ls2k-chipid", }, + {} +}; +MODULE_DEVICE_TABLE(of, loongson2_guts_of_match); + +static struct platform_driver loongson2_guts_driver = { + .driver = { + .name = "loongson2-guts", + .of_match_table = loongson2_guts_of_match, + }, + .probe = loongson2_guts_probe, + .remove = loongson2_guts_remove, +}; + +static int __init loongson2_guts_init(void) +{ + return platform_driver_register(&loongson2_guts_driver); +} +core_initcall(loongson2_guts_init); + +static void __exit loongson2_guts_exit(void) +{ + platform_driver_unregister(&loongson2_guts_driver); +} +module_exit(loongson2_guts_exit); + +MODULE_DESCRIPTION("Loongson2 GUTS driver"); +MODULE_LICENSE("GPL");