From patchwork Tue Oct 13 13:13:48 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pankaj Dubey X-Patchwork-Id: 7385301 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 0DA039F1B9 for ; Tue, 13 Oct 2015 13:22:01 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id F3ED9205FE for ; Tue, 13 Oct 2015 13:21:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 901F6205B3 for ; Tue, 13 Oct 2015 13:21:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932343AbbJMNVp (ORCPT ); Tue, 13 Oct 2015 09:21:45 -0400 Received: from mailout2.samsung.com ([203.254.224.25]:54723 "EHLO mailout2.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932147AbbJMNVl (ORCPT ); Tue, 13 Oct 2015 09:21:41 -0400 Received: from epcpsbgr1.samsung.com (u141.gpu120.samsung.co.kr [203.254.230.141]) by mailout2.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTP id <0NW5030XTUG3PX70@mailout2.samsung.com>; Tue, 13 Oct 2015 22:21:39 +0900 (KST) Received: from epcpsbgm1new.samsung.com ( [172.20.52.123]) by epcpsbgr1.samsung.com (EPCPMTA) with SMTP id 06.4D.05274.3650D165; Tue, 13 Oct 2015 22:21:39 +0900 (KST) X-AuditID: cbfee68d-f79ae6d00000149a-18-561d0563e802 Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm1new.samsung.com (EPCPMTA) with SMTP id D0.D7.23663.3650D165; Tue, 13 Oct 2015 22:21:39 +0900 (KST) Received: from chromebld-server.sisodomain.com ([107.108.73.106]) by mmp1.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTPA id <0NW5005OWU5L0I20@mmp1.samsung.com>; Tue, 13 Oct 2015 22:21:39 +0900 (KST) From: Pankaj Dubey To: linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: kgene.kim@samsung.com, k.kozlowski@samsung.com, p.fedin@samsung.com, thomas.ab@samsung.com, Pankaj Dubey Subject: [PATCH v3 6/8] drivers: soc: add support for exynos SROM driver Date: Tue, 13 Oct 2015 18:43:48 +0530 Message-id: <1444742030-31892-7-git-send-email-pankaj.dubey@samsung.com> X-Mailer: git-send-email 2.4.5 In-reply-to: <1444742030-31892-1-git-send-email-pankaj.dubey@samsung.com> References: <1444742030-31892-1-git-send-email-pankaj.dubey@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrMLMWRmVeSWpSXmKPExsWyRsSkWjeZVTbM4MAGY4vXLwwtehdcZbPY 9Pgaq8XlXXPYLGac38dk8erSKjaLRVu/sFt0LGN04PDYvKTeo2/LKkaPz5vkApijuGxSUnMy y1KL9O0SuDLaj/xgL5hjX3Hr4hGWBsZLJl2MnBwSAiYSj5p2MEPYYhIX7q1n62Lk4hASWMEo cezmE0aYom0/DzNDJJYySqy/8I8VJCEk0MokcfK0GIjNJqAr8eT9XLBJIgLZElca74M1MAt0 Mkps33wTLCEs4CFxpecYWDOLgKrEriU72EBsXqD4ict3geIcQNvkJJY214KEOQU8Jf6+m8YC sctD4kfrXrDrJAQms0tc69nHCDFHQOLb5EMsEL2yEpsOQH0jKXFwxQ2WCYzCCxgZVjGKphYk FxQnpRcZ6hUn5haX5qXrJefnbmIEhvXpf896dzDePmB9iFGAg1GJh/dFpEyYEGtiWXFl7iFG U6ANE5mlRJPzgdGTVxJvaGxmZGFqYmpsZG5ppiTOqyj1M1hIID2xJDU7NbUgtSi+qDQntfgQ IxMHp1QDowPnn1SxNZvbNyepXktcILKWW8PRbc8VVX2XOf9TZsxbpib4ZlfyB/EJX7iYZO9H Hf3nMLssnL3j+KT7IUsVN00oy2dZd8i19G2l8XTtVENjw73SGwxyb7ybG8t1m0dy4clJtq7S y4+39kfoqaz5O3n128JVU7J/zkt8wnzx7JWOdU0H09q+71diKc5INNRiLipOBAAGWMBnZgIA AA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrAIsWRmVeSWpSXmKPExsVy+t9jAd1kVtkwg7vLDCxevzC06F1wlc1i 0+NrrBaXd81hs5hxfh+TxatLq9gsFm39wm7RsYzRgcNj85J6j74tqxg9Pm+SC2COamC0yUhN TEktUkjNS85PycxLt1XyDo53jjc1MzDUNbS0MFdSyEvMTbVVcvEJ0HXLzAHar6RQlphTChQK SCwuVtK3wzQhNMRN1wKmMULXNyQIrsfIAA0krGHMaD/yg71gjn3FrYtHWBoYL5l0MXJySAiY SGz7eZgZwhaTuHBvPVsXIxeHkMBSRon1F/6xgiSEBFqZJE6eFgOx2QR0JZ68nwvWICKQLXGl 8T4zSAOzQCejxPbNN8ESwgIeEld6joE1swioSuxasoMNxOYFip+4fBcozgG0TU5iaXMtSJhT wFPi77tpLBC7PCR+tO5lm8DIu4CRYRWjRGpBckFxUnquYV5quV5xYm5xaV66XnJ+7iZGcOw8 k9rBeHCX+yFGAQ5GJR7eF5EyYUKsiWXFlbmHGCU4mJVEeJNagEK8KYmVValF+fFFpTmpxYcY TYHumsgsJZqcD4zrvJJ4Q2MTc1NjU0sTCxMzSyVx3huHGMKEBNITS1KzU1MLUotg+pg4OKUa GM8GL3ktPd837pzw40X9D05u+HmV+Y4sL7/t280J0lPNngu5LTf4UvFm1Q1VIcNnzx6KFzAz xSV6JPBuEH8U/nf1AtEZ2hl8JRcOV4eKf3MWWDC19965wPYf5ss+S6i4RDtOYjFgnbmprXm+ 6Y2vu68lCk/TzfmwyH52Z/OK884rl6XJnbrXb67EUpyRaKjFXFScCAAsGPtzswIAAA== DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_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 This patch adds Exynos SROM controller driver which will handle save restore of SROM registers during S2R. Signed-off-by: Pankaj Dubey --- drivers/soc/Kconfig | 1 + drivers/soc/Makefile | 1 + drivers/soc/samsung/Kconfig | 13 ++++ drivers/soc/samsung/Makefile | 1 + drivers/soc/samsung/exynos-srom.c | 153 ++++++++++++++++++++++++++++++++++++++ drivers/soc/samsung/exynos-srom.h | 51 +++++++++++++ 6 files changed, 220 insertions(+) create mode 100644 drivers/soc/samsung/Kconfig create mode 100644 drivers/soc/samsung/Makefile create mode 100644 drivers/soc/samsung/exynos-srom.c create mode 100644 drivers/soc/samsung/exynos-srom.h diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig index 96ddecb..69107c9 100644 --- a/drivers/soc/Kconfig +++ b/drivers/soc/Kconfig @@ -2,6 +2,7 @@ menu "SOC (System On Chip) specific Drivers" source "drivers/soc/mediatek/Kconfig" source "drivers/soc/qcom/Kconfig" +source "drivers/soc/samsung/Kconfig" source "drivers/soc/sunxi/Kconfig" source "drivers/soc/ti/Kconfig" source "drivers/soc/versatile/Kconfig" diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile index 0b12d77..a623616 100644 --- a/drivers/soc/Makefile +++ b/drivers/soc/Makefile @@ -5,6 +5,7 @@ obj-$(CONFIG_MACH_DOVE) += dove/ obj-$(CONFIG_ARCH_MEDIATEK) += mediatek/ obj-$(CONFIG_ARCH_QCOM) += qcom/ +obj-$(CONFIG_SOC_SAMSUNG) += samsung/ obj-$(CONFIG_ARCH_SUNXI) += sunxi/ obj-$(CONFIG_ARCH_TEGRA) += tegra/ obj-$(CONFIG_SOC_TI) += ti/ diff --git a/drivers/soc/samsung/Kconfig b/drivers/soc/samsung/Kconfig new file mode 100644 index 0000000..ea4bc2a --- /dev/null +++ b/drivers/soc/samsung/Kconfig @@ -0,0 +1,13 @@ +# +# SAMSUNG SoC drivers +# +menu "Samsung SOC driver support" + +config SOC_SAMSUNG + bool + +config EXYNOS_SROM + bool + depends on ARM && ARCH_EXYNOS + +endmenu diff --git a/drivers/soc/samsung/Makefile b/drivers/soc/samsung/Makefile new file mode 100644 index 0000000..9c554d5 --- /dev/null +++ b/drivers/soc/samsung/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_EXYNOS_SROM) += exynos-srom.o diff --git a/drivers/soc/samsung/exynos-srom.c b/drivers/soc/samsung/exynos-srom.c new file mode 100644 index 0000000..87bba19 --- /dev/null +++ b/drivers/soc/samsung/exynos-srom.c @@ -0,0 +1,153 @@ +/* + * Copyright (c) 2015 Samsung Electronics Co., Ltd. + * http://www.samsung.com/ + * + * EXYNOS - SROM Controller support + * Author: Pankaj Dubey + * + * 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 +#include "exynos-srom.h" + +static void __iomem *exynos_srom_base; + +static const unsigned long exynos_srom_offsets[] = { + /* SROM side */ + EXYNOS_SROM_BW, + EXYNOS_SROM_BC0, + EXYNOS_SROM_BC1, + EXYNOS_SROM_BC2, + EXYNOS_SROM_BC3, +}; + +/** + * struct exynos_srom_reg_dump: register dump of SROM Controller registers. + * @offset: srom register offset from the controller base address. + * @value: the value of register under the offset. + */ +struct exynos_srom_reg_dump { + u32 offset; + u32 value; +}; + +static struct exynos_srom_reg_dump *exynos_srom_regs; + +static struct exynos_srom_reg_dump *exynos_srom_alloc_reg_dump( + const unsigned long *rdump, + unsigned long nr_rdump) +{ + struct exynos_srom_reg_dump *rd; + unsigned int i; + + rd = kcalloc(nr_rdump, sizeof(*rd), GFP_KERNEL); + if (!rd) + return NULL; + + for (i = 0; i < nr_rdump; ++i) + rd[i].offset = rdump[i]; + + return rd; +} + +static int exynos_srom_probe(struct platform_device *pdev) +{ + struct device_node *np; + struct device *dev = &pdev->dev; + + np = dev->of_node; + exynos_srom_base = of_iomap(np, 0); + + if (!exynos_srom_base) { + pr_err("iomap of exynos srom controller failed\n"); + return -ENOMEM; + } + + exynos_srom_regs = exynos_srom_alloc_reg_dump(exynos_srom_offsets, + sizeof(exynos_srom_offsets)); + + if (!exynos_srom_regs) { + iounmap(exynos_srom_regs); + return -ENOMEM; + } + + return 0; +} + +static int exynos_srom_remove(struct platform_device *pdev) +{ + iounmap(exynos_srom_base); + exynos_srom_base = NULL; + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static void exynos_srom_save(void __iomem *base, + struct exynos_srom_reg_dump *rd, + unsigned int num_regs) +{ + for (; num_regs > 0; --num_regs, ++rd) + rd->value = readl(base + rd->offset); + +} + +static void exynos_srom_restore(void __iomem *base, + const struct exynos_srom_reg_dump *rd, + unsigned int num_regs) +{ + for (; num_regs > 0; --num_regs, ++rd) + writel(rd->value, base + rd->offset); + +} + +static int exynos_srom_suspend(struct device *dev) +{ + exynos_srom_save(exynos_srom_base, exynos_srom_regs, + ARRAY_SIZE(exynos_srom_offsets)); + + return 0; +} + +static int exynos_srom_resume(struct device *dev) +{ + exynos_srom_restore(exynos_srom_base, exynos_srom_regs, + ARRAY_SIZE(exynos_srom_offsets)); + + return 0; +} +#endif + +static const struct of_device_id of_exynos_srom_ids[] = { + { + .compatible = "samsung,exynos-srom", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, of_exynos_srom_ids); + +static SIMPLE_DEV_PM_OPS(exynos_srom_pm_ops, exynos_srom_suspend, exynos_srom_resume); + +static struct platform_driver exynos_srom_driver = { + .probe = exynos_srom_probe, + .remove = exynos_srom_remove, + .driver = { + .name = "exynos-srom", + .of_match_table = of_exynos_srom_ids, + .pm = &exynos_srom_pm_ops, + }, +}; +module_platform_driver(exynos_srom_driver); + +MODULE_AUTHOR("Pankaj Dubey "); +MODULE_DESCRIPTION("Exynos SROM Controller Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/soc/samsung/exynos-srom.h b/drivers/soc/samsung/exynos-srom.h new file mode 100644 index 0000000..34660c6 --- /dev/null +++ b/drivers/soc/samsung/exynos-srom.h @@ -0,0 +1,51 @@ +/* + * Copyright (c) 2015 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * Exynos SROMC register definitions + * + * 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 __EXYNOS_SROM_H +#define __EXYNOS_SROM_H __FILE__ + +#define EXYNOS_SROMREG(x) (x) + +#define EXYNOS_SROM_BW EXYNOS_SROMREG(0x0) +#define EXYNOS_SROM_BC0 EXYNOS_SROMREG(0x4) +#define EXYNOS_SROM_BC1 EXYNOS_SROMREG(0x8) +#define EXYNOS_SROM_BC2 EXYNOS_SROMREG(0xc) +#define EXYNOS_SROM_BC3 EXYNOS_SROMREG(0x10) +#define EXYNOS_SROM_BC4 EXYNOS_SROMREG(0x14) +#define EXYNOS_SROM_BC5 EXYNOS_SROMREG(0x18) + +/* one register BW holds 4 x 4-bit packed settings for NCS0 - NCS3 */ + +#define EXYNOS_SROM_BW__DATAWIDTH__SHIFT 0 +#define EXYNOS_SROM_BW__ADDRMODE__SHIFT 1 +#define EXYNOS_SROM_BW__WAITENABLE__SHIFT 2 +#define EXYNOS_SROM_BW__BYTEENABLE__SHIFT 3 + +#define EXYNOS_SROM_BW__CS_MASK 0xf + +#define EXYNOS_SROM_BW__NCS0__SHIFT 0 +#define EXYNOS_SROM_BW__NCS1__SHIFT 4 +#define EXYNOS_SROM_BW__NCS2__SHIFT 8 +#define EXYNOS_SROM_BW__NCS3__SHIFT 12 +#define EXYNOS_SROM_BW__NCS4__SHIFT 16 +#define EXYNOS_SROM_BW__NCS5__SHIFT 20 + +/* applies to same to BCS0 - BCS3 */ + +#define EXYNOS_SROM_BCX__PMC__SHIFT 0 +#define EXYNOS_SROM_BCX__TACP__SHIFT 4 +#define EXYNOS_SROM_BCX__TCAH__SHIFT 8 +#define EXYNOS_SROM_BCX__TCOH__SHIFT 12 +#define EXYNOS_SROM_BCX__TACC__SHIFT 16 +#define EXYNOS_SROM_BCX__TCOS__SHIFT 24 +#define EXYNOS_SROM_BCX__TACS__SHIFT 28 + +#endif /* __EXYNOS_SROM_H */