From patchwork Fri Jun 28 13:43:08 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: 2799331 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 [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id B291ABF4A1 for ; Fri, 28 Jun 2013 13:46:38 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 566B1200FA for ; Fri, 28 Jun 2013 13:46:37 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C02C4200F4 for ; Fri, 28 Jun 2013 13:46:35 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UsYzP-0004ba-Sp; Fri, 28 Jun 2013 13:45:28 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UsYz8-0005cz-Mh; Fri, 28 Jun 2013 13:45:10 +0000 Received: from mailout3.samsung.com ([203.254.224.33]) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UsYyz-0005ae-0h for linux-arm-kernel@lists.infradead.org; Fri, 28 Jun 2013 13:45:04 +0000 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 <0MP300BS7VIDYXK0@mailout3.samsung.com> for linux-arm-kernel@lists.infradead.org; Fri, 28 Jun 2013 22:44:38 +0900 (KST) X-AuditID: cbfee61a-b7f3b6d000006edd-7d-51cd9345dd6c Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id 82.C7.28381.5439DC15; Fri, 28 Jun 2013 22:44:37 +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 <0MP300GFHVG1GY60@mmp1.samsung.com>; Fri, 28 Jun 2013 22:44:37 +0900 (KST) From: Sylwester Nawrocki To: linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Subject: [PATCH v4 2/5] phy: Add driver for Exynos MIPI CSIS/DSIM DPHYs Date: Fri, 28 Jun 2013 15:43:08 +0200 Message-id: <1372426991-2482-3-git-send-email-s.nawrocki@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1372426991-2482-1-git-send-email-s.nawrocki@samsung.com> References: <1372426991-2482-1-git-send-email-s.nawrocki@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrDLMWRmVeSWpSXmKPExsVy+t9jAV3XyWcDDb6sNrM4eL/e4sDsh6wW 18/bWUy6P4HFYsbSR6wWlxdeYrXoXXCVzeLC0x42i7NNb9gtNj2+xmpxou8Dq0XPhq2sFjPO 72OyWPfwBZPF4TftrBbrZ7xmsVg//xabg6DHzll32T1eXbjD4rF5Sb3H+RkLGT36tqxi9Dh+ YzuTx+dNcgHsUVw2Kak5mWWpRfp2CVwZp7atYix4Y1NxY+JsxgbGbUZdjJwcEgImEr8erWSB sMUkLtxbz9bFyMUhJLCIUWL9kwtQTgeTxNneg0wgVWwChhK9R/sYuxg5OEQEvCWWX1MEqWEW aGKWaJ29jBWkRljAXeLxi2lg9SwCqhKrd/1gA7F5BVwltu55zA7SKyGgIDFnkg1ImFPATeLV g152EFsIqGTxkydMExh5FzAyrGIUTS1ILihOSs811CtOzC0uzUvXS87P3cQIDuNnUjsYVzZY HGIU4GBU4uFtTDwTKMSaWFZcmXuIUYKDWUmE9/CEs4FCvCmJlVWpRfnxRaU5qcWHGKU5WJTE eQ+0WgcKCaQnlqRmp6YWpBbBZJk4OKUaGAsPfeDfzntcZ9Lt/gKGxC2N3x2urPjN3NpvJ250 8/SP6t2+6w5Ol1r8jE3wUKLhkgyhlX+v/dS8L9DgIpSvsMbQkbnh3d3DNZP+7u20ixcpFN73 iSf7/5JZHB8NVdu3TfA3iItdV1r4etmM1Upud/dxnnvzfMa7m739J4SjlJXqmHfevnj272Ml luKMREMt5qLiRAAC2nW+XwIAAA== X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130628_094501_570634_B0E31B46 X-CRM114-Status: GOOD ( 21.61 ) X-Spam-Score: -8.2 (--------) Cc: jason77.wang@gmail.com, kgene.kim@samsung.com, devicetree-discuss@lists.ozlabs.org, jg1.han@samsung.com, dh09.lee@samsung.com, linux-fbdev@vger.kernel.org, balbi@ti.com, kishon@ti.com, inki.dae@samsung.com, kyungmin.park@samsung.com, tomi.valkeinen@ti.com, Sylwester Nawrocki , plagnioj@jcrosoft.com, t.figa@samsung.com, linux-media@vger.kernel.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.5 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 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 v3: - replaced spin_(un)lock_irq_{save,restore} with spin_{lock,unlock}. - DT binding file renamed to samsung-phy.txt, so it can be used for other PHYs as well, - removed inclusion, - added missing spin_lock_init(). --- .../devicetree/bindings/phy/samsung-phy.txt | 14 ++ drivers/phy/Kconfig | 9 ++ drivers/phy/Makefile | 3 +- drivers/phy/phy-exynos-mipi-video.c | 169 ++++++++++++++++++++ 4 files changed, 194 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/phy/samsung-phy.txt create mode 100644 drivers/phy/phy-exynos-mipi-video.c diff --git a/Documentation/devicetree/bindings/phy/samsung-phy.txt b/Documentation/devicetree/bindings/phy/samsung-phy.txt new file mode 100644 index 0000000..5ff208c --- /dev/null +++ b/Documentation/devicetree/bindings/phy/samsung-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..7e7fcd7 --- /dev/null +++ b/drivers/phy/phy-exynos-mipi-video.c @@ -0,0 +1,169 @@ +/* + * 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 + +/* 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; + 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(&state->slock); + 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(&state->slock); + 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); + spin_lock_init(&state->slock); + + 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 ");