From patchwork Wed Jun 26 15:02:22 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Sylwester Nawrocki/Kernel \\(PLT\\) /SRPOL/Staff Engineer/Samsung Electronics" X-Patchwork-Id: 2785951 Return-Path: X-Original-To: patchwork-linux-fbdev@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 6976EC0AB1 for ; Wed, 26 Jun 2013 15:04:19 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 029B620597 for ; Wed, 26 Jun 2013 15:04:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 939F82059F for ; Wed, 26 Jun 2013 15:04:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752288Ab3FZPDs (ORCPT ); Wed, 26 Jun 2013 11:03:48 -0400 Received: from mailout3.samsung.com ([203.254.224.33]:26693 "EHLO mailout3.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752365Ab3FZPDq (ORCPT ); Wed, 26 Jun 2013 11:03:46 -0400 Received: from epcpsbgm1.samsung.com (epcpsbgm1 [203.254.230.26]) by mailout3.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0MP0006179U8U130@mailout3.samsung.com>; Thu, 27 Jun 2013 00:03:44 +0900 (KST) X-AuditID: cbfee61a-b7f3b6d000006edd-3a-51cb02d0fe03 Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id 1D.30.28381.0D20BC15; Thu, 27 Jun 2013 00:03:44 +0900 (KST) Received: from amdc1344.digital.local ([106.116.147.32]) by mmp1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0MP000KGO9S4RV50@mmp1.samsung.com>; Thu, 27 Jun 2013 00:03:44 +0900 (KST) From: Sylwester Nawrocki To: linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Cc: kishon@ti.com, linux-media@vger.kernel.org, kyungmin.park@samsung.com, balbi@ti.com, t.figa@samsung.com, devicetree-discuss@lists.ozlabs.org, kgene.kim@samsung.com, dh09.lee@samsung.com, jg1.han@samsung.com, inki.dae@samsung.com, plagnioj@jcrosoft.com, linux-fbdev@vger.kernel.org, Sylwester Nawrocki Subject: [PATCH v3 1/5] phy: Add driver for Exynos MIPI CSIS/DSIM DPHYs Date: Wed, 26 Jun 2013 17:02:22 +0200 Message-id: <1372258946-15607-2-git-send-email-s.nawrocki@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1372258946-15607-1-git-send-email-s.nawrocki@samsung.com> References: <1372258946-15607-1-git-send-email-s.nawrocki@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrFLMWRmVeSWpSXmKPExsVy+t9jAd0LTKcDDX4fU7U4eL/e4sDsh6wW 18/bWUy6P4HF4vLCS6wWvQuusllceNrDZnG26Q27xabH11gtTvR9YLXo2bCV1WLG+X1MFuse vmCyOPymndVi/YzXLA78Hq8u3GHx2Lyk3uP8jIWMHn1bVjF6HL+xncnj8ya5ALYoLpuU1JzM stQifbsErozepU/YCs7ZVsw6/oWpgXGScRcjJ4eEgInEsyctjBC2mMSFe+vZuhi5OIQEFjFK /Jl+jB3C6WCSuHWmjwmkik3AUKL3aB9QBweHiIC3xPJriiA1zAIXmSRO733HBhIXFnCXaNgb BGKyCKhKXHscA2LyCrhJbHinBGJKCChIzJlkAzKPE6j2es9pdhBbCKhiTuNZ5gmMvAsYGVYx iqYWJBcUJ6XnGuoVJ+YWl+al6yXn525iBIfoM6kdjCsbLA4xCnAwKvHwKmw9GSjEmlhWXJl7 iFGCg1lJhPfN/FOBQrwpiZVVqUX58UWlOanFhxilOViUxHkPtFoHCgmkJ5akZqemFqQWwWSZ ODilGhjZ5BRKJWb8Xyd2T2PKkamt5fM3cV9qmLD9MK9vxIG1/X4RZx063p5dqT3f8Pr7CEau VStVnl6+vDxaiaXstkiv4p7L/TKnPiQ2XqxM2Hej2+/h1duLbnaLM0R8v1Mfydt1acH6ChWD lUaB72VOMf1tdT8UcF10r9yvye6VqY81/gXyXdKR1U5TYinOSDTUYi4qTgQA+lMi0k0CAAA= Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Spam-Status: No, score=-8.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 Add a PHY provider driver for the Samsung S5P/Exynos SoC MIPI CSI-2 receiver and MIPI DSI transmitter DPHYs. Signed-off-by: Sylwester Nawrocki Signed-off-by: Kyungmin Park Acked-by: Felipe Balbi --- Changes since v2: - adapted to the generic PHY API v9: use phy_set/get_drvdata(), - fixed of_xlate callback to return ERR_PTR() instead of NULL, - namespace cleanup, put "GPL v2" as MODULE_LICENSE, removed pr_debug, - removed phy id check in __set_phy_state(). --- .../phy/samsung,s5pv210-mipi-video-phy.txt | 14 ++ drivers/phy/Kconfig | 9 ++ drivers/phy/Makefile | 3 +- drivers/phy/phy-exynos-mipi-video.c | 170 ++++++++++++++++++++ 4 files changed, 195 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/phy/samsung,s5pv210-mipi-video-phy.txt create mode 100644 drivers/phy/phy-exynos-mipi-video.c diff --git a/Documentation/devicetree/bindings/phy/samsung,s5pv210-mipi-video-phy.txt b/Documentation/devicetree/bindings/phy/samsung,s5pv210-mipi-video-phy.txt new file mode 100644 index 0000000..5ff208c --- /dev/null +++ b/Documentation/devicetree/bindings/phy/samsung,s5pv210-mipi-video-phy.txt @@ -0,0 +1,14 @@ +Samsung S5P/EXYNOS SoC series MIPI CSIS/DSIM DPHY +------------------------------------------------- + +Required properties: +- compatible : should be "samsung,s5pv210-mipi-video-phy"; +- reg : offset and length of the MIPI DPHY register set; +- #phy-cells : from the generic phy bindings, must be 1; + +For "samsung,s5pv210-mipi-video-phy" compatible PHYs the second cell in +the PHY specifier identifies the PHY and its meaning is as follows: + 0 - MIPI CSIS 0, + 1 - MIPI DSIM 0, + 2 - MIPI CSIS 1, + 3 - MIPI DSIM 1. diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 5f85909..6f446d0 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -11,3 +11,12 @@ menuconfig GENERIC_PHY devices present in the kernel. This layer will have the generic API by which phy drivers can create PHY using the phy framework and phy users can obtain reference to the PHY. + +if GENERIC_PHY + +config PHY_EXYNOS_MIPI_VIDEO + tristate "S5P/EXYNOS SoC series MIPI CSI-2/DSI PHY driver" + help + Support for MIPI CSI-2 and MIPI DSI DPHY found on Samsung + S5P and EXYNOS SoCs. +endif diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 9e9560f..71d8841 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -2,4 +2,5 @@ # Makefile for the phy drivers. # -obj-$(CONFIG_GENERIC_PHY) += phy-core.o +obj-$(CONFIG_GENERIC_PHY) += phy-core.o +obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o diff --git a/drivers/phy/phy-exynos-mipi-video.c b/drivers/phy/phy-exynos-mipi-video.c new file mode 100644 index 0000000..d0cd048 --- /dev/null +++ b/drivers/phy/phy-exynos-mipi-video.c @@ -0,0 +1,170 @@ +/* + * Samsung S5P/EXYNOS SoC series MIPI CSIS/DSIM DPHY driver + * + * Copyright (C) 2013 Samsung Electronics Co., Ltd. + * Author: Sylwester Nawrocki + * + * 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 +#include + +/* MIPI_PHYn_CONTROL register offset: n = 0..1 */ +#define EXYNOS_MIPI_PHY_CONTROL(n) ((n) * 4) +#define EXYNOS_MIPI_PHY_ENABLE (1 << 0) +#define EXYNOS_MIPI_PHY_SRESETN (1 << 1) +#define EXYNOS_MIPI_PHY_MRESETN (1 << 2) +#define EXYNOS_MIPI_PHY_RESET_MASK (3 << 1) + +enum exynos_mipi_phy_id { + EXYNOS_MIPI_PHY_ID_CSIS0, + EXYNOS_MIPI_PHY_ID_DSIM0, + EXYNOS_MIPI_PHY_ID_CSIS1, + EXYNOS_MIPI_PHY_ID_DSIM1, + EXYNOS_MIPI_PHYS_NUM +}; + +#define IS_EXYNOS_MIPI_DSIM_PHY_ID(id) \ + ((id) == EXYNOS_MIPI_PHY_ID_DSIM0 || (id) == EXYNOS_MIPI_PHY_ID_DSIM0) + +struct exynos_mipi_video_phy { + spinlock_t slock; + struct phy *phys[EXYNOS_MIPI_PHYS_NUM]; + void __iomem *regs; +}; + +static int __set_phy_state(struct exynos_mipi_video_phy *state, + enum exynos_mipi_phy_id id, unsigned int on) +{ + void __iomem *addr; + unsigned long flags; + u32 reg, reset; + + addr = state->regs + EXYNOS_MIPI_PHY_CONTROL(id / 2); + + if (IS_EXYNOS_MIPI_DSIM_PHY_ID(id)) + reset = EXYNOS_MIPI_PHY_MRESETN; + else + reset = EXYNOS_MIPI_PHY_SRESETN; + + spin_lock_irqsave(&state->slock, flags); + reg = readl(addr); + if (on) + reg |= reset; + else + reg &= ~reset; + writel(reg, addr); + + /* Clear ENABLE bit only if MRESETN, SRESETN bits are not set. */ + if (on) + reg |= EXYNOS_MIPI_PHY_ENABLE; + else if (!(reg & EXYNOS_MIPI_PHY_RESET_MASK)) + reg &= ~EXYNOS_MIPI_PHY_ENABLE; + + writel(reg, addr); + spin_unlock_irqrestore(&state->slock, flags); + return 0; +} + +static int exynos_mipi_video_phy_power_on(struct phy *phy) +{ + struct exynos_mipi_video_phy *state = phy_get_drvdata(phy); + return __set_phy_state(state, phy->id, 1); +} + +static int exynos_mipi_video_phy_power_off(struct phy *phy) +{ + struct exynos_mipi_video_phy *state = phy_get_drvdata(phy); + return __set_phy_state(state, phy->id, 0); +} + +static struct phy *exynos_mipi_video_phy_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct exynos_mipi_video_phy *state = dev_get_drvdata(dev); + + if (WARN_ON(args->args[0] > EXYNOS_MIPI_PHYS_NUM)) + return ERR_PTR(-ENODEV); + + return state->phys[args->args[0]]; +} + +static struct phy_ops exynos_mipi_video_phy_ops = { + .power_on = exynos_mipi_video_phy_power_on, + .power_off = exynos_mipi_video_phy_power_off, + .owner = THIS_MODULE, +}; + +static int exynos_mipi_video_phy_probe(struct platform_device *pdev) +{ + struct exynos_mipi_video_phy *state; + struct device *dev = &pdev->dev; + struct resource *res; + struct phy_provider *phy_provider; + int i; + + state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL); + if (!state) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + state->regs = devm_ioremap_resource(dev, res); + if (IS_ERR(state->regs)) + return PTR_ERR(state->regs); + + dev_set_drvdata(dev, state); + + phy_provider = devm_of_phy_provider_register(dev, + exynos_mipi_video_phy_xlate); + if (IS_ERR(phy_provider)) + return PTR_ERR(phy_provider); + + for (i = 0; i < EXYNOS_MIPI_PHYS_NUM; i++) { + char label[8]; + + snprintf(label, sizeof(label), "%s.%d", + IS_EXYNOS_MIPI_DSIM_PHY_ID(i) ? + "dsim" : "csis", i / 2); + + state->phys[i] = devm_phy_create(dev, i, + &exynos_mipi_video_phy_ops, label); + if (IS_ERR(state->phys[i])) { + dev_err(dev, "failed to create PHY %s\n", label); + return PTR_ERR(state->phys[i]); + } + phy_set_drvdata(state->phys[i], state); + } + + return 0; +} + +static const struct of_device_id exynos_mipi_video_phy_of_match[] = { + { .compatible = "samsung,s5pv210-mipi-video-phy" }, + { }, +}; +MODULE_DEVICE_TABLE(of, exynos_mipi_video_phy_of_match); + +static struct platform_driver exynos_mipi_video_phy_driver = { + .probe = exynos_mipi_video_phy_probe, + .driver = { + .of_match_table = exynos_mipi_video_phy_of_match, + .name = "exynos-mipi-video-phy", + .owner = THIS_MODULE, + } +}; +module_platform_driver(exynos_mipi_video_phy_driver); + +MODULE_DESCRIPTION("Samsung S5P/EXYNOS SoC MIPI CSI-2/DSI PHY driver"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Sylwester Nawrocki ");