From patchwork Tue Jun 25 14:21:46 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: 2776841 Return-Path: X-Original-To: patchwork-linux-fbdev@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id BCBBA9F755 for ; Tue, 25 Jun 2013 14:22:15 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C79D62026C for ; Tue, 25 Jun 2013 14:22:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DA0942026F for ; Tue, 25 Jun 2013 14:22:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751102Ab3FYOWI (ORCPT ); Tue, 25 Jun 2013 10:22:08 -0400 Received: from mailout2.samsung.com ([203.254.224.25]:49794 "EHLO mailout2.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751059Ab3FYOWG (ORCPT ); Tue, 25 Jun 2013 10:22:06 -0400 Received: from epcpsbgm1.samsung.com (epcpsbgm1 [203.254.230.26]) by mailout2.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0MOY00BBAD8TLH90@mailout2.samsung.com>; Tue, 25 Jun 2013 23:22:05 +0900 (KST) X-AuditID: cbfee61a-b7f3b6d000006edd-b3-51c9a78d2934 Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id F3.10.28381.D87A9C15; Tue, 25 Jun 2013 23:22:05 +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 <0MOY00ISLD8IH350@mmp1.samsung.com>; Tue, 25 Jun 2013 23:22:05 +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 v2 1/5] phy: Add driver for Exynos MIPI CSIS/DSIM DPHYs Date: Tue, 25 Jun 2013 16:21:46 +0200 Message-id: <1372170110-12993-1-git-send-email-s.nawrocki@samsung.com> X-Mailer: git-send-email 1.7.9.5 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrCLMWRmVeSWpSXmKPExsVy+t9jAd3e5ScDDT685LQ4eL/e4sDsh6wW 18/bWUy6P4HF4vLCS6wWvQuusllceNrDZnG26Q27xabH11gtTvR9YLXo2bCV1WLG+X1MFuse vmCyOPymndVi/YzXLA78Hq8u3GHx2Lyk3uP8jIWMHn1bVjF6HL+xncnj8ya5ALYoLpuU1JzM stQifbsErozVU7eyF6ywrWhYOYOtgXGDURcjB4eEgInEyq/JXYycQKaYxIV769m6GLk4hAQW MUp83/OPHcLpYJLYcfg0M0gVm4ChRO/RPkaQZhEBb4nl1xRBapgFLjJJnN77jg2kRljAXaKz rZEJxGYRUJX4sXgbC4jNK+Am8XPCEXaIxQoScybZTGDkXsDIsIpRNLUguaA4KT3XUK84Mbe4 NC9dLzk/dxMjOOyeSe1gXNlgcYhRgINRiYc3cteJQCHWxLLiytxDjBIczEoivIeyTgYK8aYk VlalFuXHF5XmpBYfYpTmYFES5z3Qah0oJJCeWJKanZpakFoEk2Xi4JRqYBS9eFvm5qx1tQu3 X7q3r+lN9LSq5FsrtXcctr8d+/xXnM0UV5kVyjlHfnRMW7W14uzKyEiHU1+d0g577N5avD/w /+WZ35auj/kkcGhW0sRlM9gMlQPyt/r5vDJKE887lM57b69y+IPOqXJMC37NsdDplat/6fHm XVDsnUXVb2y+dQQsOBTCkvBKiaU4I9FQi7moOBEAVmbqqzcCAAA= 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 --- Changes since v1: - enabled build as module and with CONFIG_OF disabled - added phy_id enum, - of_address_to_resource() replaced with platform_get_resource(), - adapted to changes in the PHY API v7, v8 - added phy labels, - added MODULE_DEVICE_TABLE() entry, - driver file renamed to phy-exynos-mipi-video.c, - changed DT compatible string to "samsung,s5pv210-mipi-video-phy", - corrected the compatible property's description. --- .../phy/samsung,s5pv210-mipi-video-phy.txt | 14 ++ drivers/phy/Kconfig | 9 + drivers/phy/Makefile | 3 +- drivers/phy/phy-exynos-mipi-video.c | 173 ++++++++++++++++++++ 4 files changed, 198 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..074a623 --- /dev/null +++ b/drivers/phy/phy-exynos-mipi-video.c @@ -0,0 +1,173 @@ +/* + * 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 phy_id { + PHY_CSIS0, + PHY_DSIM0, + PHY_CSIS1, + PHY_DSIM1, + NUM_PHYS +}; + +struct exynos_video_phy { + spinlock_t slock; + struct phy *phys[NUM_PHYS]; + void __iomem *regs; +}; + +static int __set_phy_state(struct exynos_video_phy *state, + enum phy_id id, unsigned int on) +{ + void __iomem *addr; + unsigned long flags; + u32 reg, reset; + + if (WARN_ON(id > NUM_PHYS)) + return -EINVAL; + + addr = state->regs + EXYNOS_MIPI_PHY_CONTROL(id / 2); + + if (id == PHY_DSIM0 || id == PHY_DSIM1) + 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); + + pr_debug("%s(): id: %d, on: %d, addr: %#x, base: %#x\n", + __func__, id, on, (u32)addr, (u32)state->regs); + + return 0; +} + +static int exynos_video_phy_power_on(struct phy *phy) +{ + struct exynos_video_phy *state = dev_get_drvdata(&phy->dev); + return __set_phy_state(state, phy->id, 1); +} + +static int exynos_video_phy_power_off(struct phy *phy) +{ + struct exynos_video_phy *state = dev_get_drvdata(&phy->dev); + return __set_phy_state(state, phy->id, 0); +} + +static struct phy *exynos_video_phy_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct exynos_video_phy *state = dev_get_drvdata(dev); + + if (WARN_ON(args->args[0] > NUM_PHYS)) + return NULL; + + return state->phys[args->args[0]]; +} + +static struct phy_ops exynos_video_phy_ops = { + .power_on = exynos_video_phy_power_on, + .power_off = exynos_video_phy_power_off, + .owner = THIS_MODULE, +}; + +static int exynos_video_phy_probe(struct platform_device *pdev) +{ + struct exynos_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_video_phy_xlate); + if (IS_ERR(phy_provider)) + return PTR_ERR(phy_provider); + + for (i = 0; i < NUM_PHYS; i++) { + char label[8]; + + snprintf(label, sizeof(label), "%s.%d", + i == PHY_DSIM0 || i == PHY_DSIM1 ? + "dsim" : "csis", i / 2); + + state->phys[i] = devm_phy_create(dev, i, &exynos_video_phy_ops, + label, state); + if (IS_ERR(state->phys[i])) { + dev_err(dev, "failed to create PHY %s\n", label); + return PTR_ERR(state->phys[i]); + } + } + + return 0; +} + +static const struct of_device_id exynos_video_phy_of_match[] = { + { .compatible = "samsung,s5pv210-mipi-video-phy" }, + { }, +}; +MODULE_DEVICE_TABLE(of, exynos_video_phy_of_match); + +static struct platform_driver exynos_video_phy_driver = { + .probe = exynos_video_phy_probe, + .driver = { + .of_match_table = exynos_video_phy_of_match, + .name = "exynos-mipi-video-phy", + .owner = THIS_MODULE, + } +}; +module_platform_driver(exynos_video_phy_driver); + +MODULE_DESCRIPTION("Samsung S5P/EXYNOS SoC MIPI CSI-2/DSI PHY driver"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Sylwester Nawrocki ");