From patchwork Thu Feb 4 11:37:38 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gabriele Paoloni X-Patchwork-Id: 8219831 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 7AFC7BEEE5 for ; Thu, 4 Feb 2016 11:29:02 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4517C20279 for ; Thu, 4 Feb 2016 11:29:01 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0EBC82012E for ; Thu, 4 Feb 2016 11:29:00 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1aRI3L-00075N-RK; Thu, 04 Feb 2016 11:26:23 +0000 Received: from casper.infradead.org ([85.118.1.10]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1aRI2M-0005Hx-5Z for linux-arm-kernel@bombadil.infradead.org; Thu, 04 Feb 2016 11:25:22 +0000 Received: from szxga01-in.huawei.com ([58.251.152.64]) by casper.infradead.org with esmtps (Exim 4.85 #2 (Red Hat Linux)) id 1aRI1I-0005rP-Aw for linux-arm-kernel@lists.infradead.org; Thu, 04 Feb 2016 11:24:18 +0000 Received: from 172.24.1.47 (EHLO szxeml426-hub.china.huawei.com) ([172.24.1.47]) by szxrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id DED57509; Thu, 04 Feb 2016 19:22:55 +0800 (CST) Received: from localhost.localdomain (10.67.212.75) by szxeml426-hub.china.huawei.com (10.82.67.181) with Microsoft SMTP Server id 14.3.235.1; Thu, 4 Feb 2016 19:22:47 +0800 From: Gabriele Paoloni To: , , , , , , , , Subject: [RFC PATCH 2/4] PCI: hisi: re-architect Hip05/Hip06 controllers driver to preapare for ACPI Date: Thu, 4 Feb 2016 19:37:38 +0800 Message-ID: <1454585860-60709-3-git-send-email-gabriele.paoloni@huawei.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1454585860-60709-1-git-send-email-gabriele.paoloni@huawei.com> References: <1454585860-60709-1-git-send-email-gabriele.paoloni@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.67.212.75] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A0B0204.56B33491.0213, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: b7ede55d8f639b2d704ab62a310c8e2b X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160204_112417_585899_BFCEAC3D X-CRM114-Status: GOOD ( 27.32 ) X-Spam-Score: -4.2 (----) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: gabriele.paoloni@huawei.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, xuwei5@hisilicon.com, linux-acpi@vger.kernel.org, jcm@redhat.com, zhangjukuo@huawei.com, liguozhu@hisilicon.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.7 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: gabriele paoloni re-architect the Hip05/Hip06 host controllers driver to prepare for the ACPI based driver. The common functions used also by the ACPI driver have been grouped into a new "common" file Signed-off-by: Gabriele Paoloni --- MAINTAINERS | 2 + drivers/pci/host/Makefile | 2 +- drivers/pci/host/pcie-hisi-common.c | 88 +++++++++++++++++++++++ drivers/pci/host/pcie-hisi.c | 135 ++++++------------------------------ drivers/pci/host/pcie-hisi.h | 44 ++++++++++++ 5 files changed, 157 insertions(+), 114 deletions(-) create mode 100644 drivers/pci/host/pcie-hisi-common.c create mode 100644 drivers/pci/host/pcie-hisi.h diff --git a/MAINTAINERS b/MAINTAINERS index c80d9ff..8d6ec25 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8247,7 +8247,9 @@ M: Gabriele Paoloni L: linux-pci@vger.kernel.org S: Maintained F: Documentation/devicetree/bindings/pci/hisilicon-pcie.txt +F: drivers/pci/host/pcie-hisi.h F: drivers/pci/host/pcie-hisi.c +F: drivers/pci/host/pcie-hisi-common.c PCMCIA SUBSYSTEM P: Linux PCMCIA Team diff --git a/drivers/pci/host/Makefile b/drivers/pci/host/Makefile index 9d4d3c6..6248320 100644 --- a/drivers/pci/host/Makefile +++ b/drivers/pci/host/Makefile @@ -19,4 +19,4 @@ obj-$(CONFIG_PCIE_IPROC_PLATFORM) += pcie-iproc-platform.o obj-$(CONFIG_PCIE_IPROC_BCMA) += pcie-iproc-bcma.o obj-$(CONFIG_PCIE_ALTERA) += pcie-altera.o obj-$(CONFIG_PCIE_ALTERA_MSI) += pcie-altera-msi.o -obj-$(CONFIG_PCI_HISI) += pcie-hisi.o +obj-$(CONFIG_PCI_HISI) += pcie-hisi.o pcie-hisi-common.o diff --git a/drivers/pci/host/pcie-hisi-common.c b/drivers/pci/host/pcie-hisi-common.c new file mode 100644 index 0000000..ff93293 --- /dev/null +++ b/drivers/pci/host/pcie-hisi-common.c @@ -0,0 +1,88 @@ +/* + * PCIe host controller common functions for HiSilicon SoCs + * + * Copyright (C) 2015 HiSilicon Co., Ltd. http://www.hisilicon.com + * + * Author: Zhou Wang + * Dacai Zhu + * Gabriele Paoloni + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include + +#include "pcie-designware.h" +#include "pcie-hisi.h" + +/* HipXX PCIe host only supports 32-bit config access */ +static int hisi_pcie_cfg_read(struct pcie_port *pp, int where, int size, + u32 *val) +{ + u32 reg; + u32 reg_val; + struct hisi_pcie *pcie = to_hisi_pcie(pp); + void *walker = ®_val; + + walker += (where & 0x3); + reg = where & ~0x3; + reg_val = hisi_pcie_apb_readl(pcie, reg); + + if (size == 1) + *val = *(u8 __force *) walker; + else if (size == 2) + *val = *(u16 __force *) walker; + else if (size == 4) + *val = reg_val; + else + return PCIBIOS_BAD_REGISTER_NUMBER; + + return PCIBIOS_SUCCESSFUL; +} + +/* HipXX PCIe host only supports 32-bit config access */ +static int hisi_pcie_cfg_write(struct pcie_port *pp, int where, int size, + u32 val) +{ + u32 reg_val; + u32 reg; + struct hisi_pcie *pcie = to_hisi_pcie(pp); + void *walker = ®_val; + + walker += (where & 0x3); + reg = where & ~0x3; + if (size == 4) + hisi_pcie_apb_writel(pcie, val, reg); + else if (size == 2) { + reg_val = hisi_pcie_apb_readl(pcie, reg); + *(u16 __force *) walker = val; + hisi_pcie_apb_writel(pcie, reg_val, reg); + } else if (size == 1) { + reg_val = hisi_pcie_apb_readl(pcie, reg); + *(u8 __force *) walker = val; + hisi_pcie_apb_writel(pcie, reg_val, reg); + } else + return PCIBIOS_BAD_REGISTER_NUMBER; + + return PCIBIOS_SUCCESSFUL; +} + +static int hisi_pcie_link_up(struct pcie_port *pp) +{ + struct hisi_pcie *hisi_pcie = to_hisi_pcie(pp); + + return hisi_pcie->soc_ops->hisi_pcie_link_up(hisi_pcie); +} + +struct pcie_host_ops hisi_pcie_host_ops = { + .rd_own_conf = hisi_pcie_cfg_read, + .wr_own_conf = hisi_pcie_cfg_write, + .link_up = hisi_pcie_link_up, +}; diff --git a/drivers/pci/host/pcie-hisi.c b/drivers/pci/host/pcie-hisi.c index 3e98d4e..552ebfc 100644 --- a/drivers/pci/host/pcie-hisi.c +++ b/drivers/pci/host/pcie-hisi.c @@ -21,124 +21,13 @@ #include #include "pcie-designware.h" +#include "pcie-hisi.h" #define PCIE_LTSSM_LINKUP_STATE 0x11 #define PCIE_LTSSM_STATE_MASK 0x3F #define PCIE_SUBCTRL_SYS_STATE4_REG 0x6818 -#define PCIE_SYS_STATE4 0x31c #define PCIE_HIP06_CTRL_OFF 0x1000 - -#define to_hisi_pcie(x) container_of(x, struct hisi_pcie, pp) - -struct hisi_pcie; - -struct pcie_soc_ops { - int (*hisi_pcie_link_up)(struct hisi_pcie *pcie); -}; - -struct hisi_pcie { - struct regmap *subctrl; - void __iomem *reg_base; - u32 port_id; - struct pcie_port pp; - struct pcie_soc_ops *soc_ops; -}; - -static inline void hisi_pcie_apb_writel(struct hisi_pcie *pcie, - u32 val, u32 reg) -{ - writel(val, pcie->reg_base + reg); -} - -static inline u32 hisi_pcie_apb_readl(struct hisi_pcie *pcie, u32 reg) -{ - return readl(pcie->reg_base + reg); -} - -/* HipXX PCIe host only supports 32-bit config access */ -static int hisi_pcie_cfg_read(struct pcie_port *pp, int where, int size, - u32 *val) -{ - u32 reg; - u32 reg_val; - struct hisi_pcie *pcie = to_hisi_pcie(pp); - void *walker = ®_val; - - walker += (where & 0x3); - reg = where & ~0x3; - reg_val = hisi_pcie_apb_readl(pcie, reg); - - if (size == 1) - *val = *(u8 __force *) walker; - else if (size == 2) - *val = *(u16 __force *) walker; - else if (size == 4) - *val = reg_val; - else - return PCIBIOS_BAD_REGISTER_NUMBER; - - return PCIBIOS_SUCCESSFUL; -} - -/* HipXX PCIe host only supports 32-bit config access */ -static int hisi_pcie_cfg_write(struct pcie_port *pp, int where, int size, - u32 val) -{ - u32 reg_val; - u32 reg; - struct hisi_pcie *pcie = to_hisi_pcie(pp); - void *walker = ®_val; - - walker += (where & 0x3); - reg = where & ~0x3; - if (size == 4) - hisi_pcie_apb_writel(pcie, val, reg); - else if (size == 2) { - reg_val = hisi_pcie_apb_readl(pcie, reg); - *(u16 __force *) walker = val; - hisi_pcie_apb_writel(pcie, reg_val, reg); - } else if (size == 1) { - reg_val = hisi_pcie_apb_readl(pcie, reg); - *(u8 __force *) walker = val; - hisi_pcie_apb_writel(pcie, reg_val, reg); - } else - return PCIBIOS_BAD_REGISTER_NUMBER; - - return PCIBIOS_SUCCESSFUL; -} - -static int hisi_pcie_link_up_hip05(struct hisi_pcie *hisi_pcie) -{ - u32 val; - - regmap_read(hisi_pcie->subctrl, PCIE_SUBCTRL_SYS_STATE4_REG + - 0x100 * hisi_pcie->port_id, &val); - - return ((val & PCIE_LTSSM_STATE_MASK) == PCIE_LTSSM_LINKUP_STATE); -} - -static int hisi_pcie_link_up_hip06(struct hisi_pcie *hisi_pcie) -{ - u32 val; - - val = hisi_pcie_apb_readl(hisi_pcie, PCIE_HIP06_CTRL_OFF + - PCIE_SYS_STATE4); - - return ((val & PCIE_LTSSM_STATE_MASK) == PCIE_LTSSM_LINKUP_STATE); -} - -static int hisi_pcie_link_up(struct pcie_port *pp) -{ - struct hisi_pcie *hisi_pcie = to_hisi_pcie(pp); - - return hisi_pcie->soc_ops->hisi_pcie_link_up(hisi_pcie); -} - -static struct pcie_host_ops hisi_pcie_host_ops = { - .rd_own_conf = hisi_pcie_cfg_read, - .wr_own_conf = hisi_pcie_cfg_write, - .link_up = hisi_pcie_link_up, -}; +#define PCIE_SYS_STATE4 0x31c static int hisi_add_pcie_port(struct pcie_port *pp, struct platform_device *pdev) @@ -215,6 +104,26 @@ static int hisi_pcie_probe(struct platform_device *pdev) return 0; } +static int hisi_pcie_link_up_hip05(struct hisi_pcie *hisi_pcie) +{ + u32 val; + + regmap_read(hisi_pcie->subctrl, PCIE_SUBCTRL_SYS_STATE4_REG + + 0x100 * hisi_pcie->port_id, &val); + + return ((val & PCIE_LTSSM_STATE_MASK) == PCIE_LTSSM_LINKUP_STATE); +} + +static int hisi_pcie_link_up_hip06(struct hisi_pcie *hisi_pcie) +{ + u32 val; + + val = hisi_pcie_apb_readl(hisi_pcie, PCIE_HIP06_CTRL_OFF + + PCIE_SYS_STATE4); + + return ((val & PCIE_LTSSM_STATE_MASK) == PCIE_LTSSM_LINKUP_STATE); +} + static struct pcie_soc_ops hip05_ops = { &hisi_pcie_link_up_hip05 }; diff --git a/drivers/pci/host/pcie-hisi.h b/drivers/pci/host/pcie-hisi.h new file mode 100644 index 0000000..f64249d --- /dev/null +++ b/drivers/pci/host/pcie-hisi.h @@ -0,0 +1,44 @@ +/* + * PCIe host controller driver for HiSilicon SoCs + * + * Copyright (C) 2015 HiSilicon Co., Ltd. http://www.hisilicon.com + * + * Author: Zhou Wang + * Dacai Zhu + * Gabriele Paoloni + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef PCIE_HISI_H_ +#define PCIE_HISI_H_ + +struct hisi_pcie { + struct regmap *subctrl; + void __iomem *reg_base; + u32 port_id; + struct pcie_port pp; + struct pcie_soc_ops *soc_ops; +}; + +struct pcie_soc_ops { + int (*hisi_pcie_link_up)(struct hisi_pcie *pcie); +}; + +static inline void hisi_pcie_apb_writel(struct hisi_pcie *pcie, + u32 val, u32 reg) +{ + writel(val, pcie->reg_base + reg); +} + +static inline u32 hisi_pcie_apb_readl(struct hisi_pcie *pcie, u32 reg) +{ + return readl(pcie->reg_base + reg); +} + +#define to_hisi_pcie(x) container_of(x, struct hisi_pcie, pp) + +extern struct pcie_host_ops hisi_pcie_host_ops; + +#endif /* PCIE_HISI_H_ */