Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752322Ab3IKL17 (ORCPT ); Wed, 11 Sep 2013 07:27:59 -0400 Received: from mailout1.samsung.com ([203.254.224.24]:9396 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751744Ab3IKL15 (ORCPT ); Wed, 11 Sep 2013 07:27:57 -0400 X-AuditID: cbfee61a-b7f7a6d00000235f-b7-523053bbc657 From: Kamil Debski To: linux-kernel@vger.kernel.org Cc: Kamil Debski , Kyungmin Park , Kishon Vijay Abraham I , Tomasz Figa , Sylwester Nawrocki , Marek Szyprowski Subject: [RFC] [PATCH] phy: Add new Exynos USB PHY driver Date: Wed, 11 Sep 2013 13:27:38 +0200 Message-id: <1378898858-30639-1-git-send-email-k.debski@samsung.com> X-Mailer: git-send-email 1.7.9.5 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrEJMWRmVeSWpSXmKPExsVy+t9jAd3dwQZBBgdeSlj8eH2BzeLC0x42 i7NNb9gtLu+aw2ax9shddovDb9pZLdbPeM3iwO7Rt2UVo8fxG9uZPD5vkgtgjuKySUnNySxL LdK3S+DK+L5oBVPBxgamipPHZzI3MD69yNjFyMkhIWAicXjFIiYIW0ziwr31bF2MXBxCAosY JfZsb2KGcDqYJK6f+grkcHCwCWhKrLrnAdIgIqAgsbn3GStIDbPAP0aJky/fsILUCAtYShzb wwlSwyKgKvHp9muwBbwCLhJbd95gBymRAOqdM8lmAiP3AkaGVYyiqQXJBcVJ6bmGesWJucWl eel6yfm5mxjBIfFMagfjygaLQ4wCHIxKPLw35PSDhFgTy4orcw8xSnAwK4nwPjA1CBLiTUms rEotyo8vKs1JLT7EKM3BoiTOe6DVOlBIID2xJDU7NbUgtQgmy8TBKdXAuH/HbN2VKbvmSry4 vWPz20YBOem3eyaKtNRPbbjwW8boeZX8+YlTs64+/3Y4XXXO26UXLC0ep71uKH1/4WTdpiX3 P/9/2M21uenh8YuMukxtIjIfljzJMH9s+azpyRKpnX6/y+ZPX2F87e+ZOB3Z7dkpV0U2HdX/ f8+vp8E5j3f9p7UyN74e0ZZUYinOSDTUYi4qTgQAwNI0PQUCAAA= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 31895 Lines: 1172 Add a new driver for the Exynos USB PHY. The new driver uses the generic PHY framework. Signed-off-by: Kamil Debski Signed-off-by: Kyungmin Park Cc: Kishon Vijay Abraham I Cc: Tomasz Figa Cc: Sylwester Nawrocki Cc: Marek Szyprowski --- Hi, This patch adds a new drive for USB PHYs for Samsung SoCs. The driver is using the Generic PHY Framework created by Kishon Vijay Abrahan I. It can be found here https://lkml.org/lkml/2013/8/21/29. This patch adds support to Exynos4 family of SoCs. Support for Exynos3 and Exynos5 is planned to be added in the near future. I welcome your comments. Best wishes, Kamil Debski --- .../devicetree/bindings/phy/samsung-usbphy.txt | 48 +++ drivers/phy/Kconfig | 23 ++ drivers/phy/Makefile | 3 + drivers/phy/phy-exynos-usb.c | 245 ++++++++++++++ drivers/phy/phy-exynos-usb.h | 95 ++++++ drivers/phy/phy-exynos4210-usb.c | 315 ++++++++++++++++++ drivers/phy/phy-exynos4212-usb.c | 349 ++++++++++++++++++++ 7 files changed, 1078 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/samsung-usbphy.txt create mode 100644 drivers/phy/phy-exynos-usb.c create mode 100644 drivers/phy/phy-exynos-usb.h create mode 100644 drivers/phy/phy-exynos4210-usb.c create mode 100644 drivers/phy/phy-exynos4212-usb.c diff --git a/Documentation/devicetree/bindings/phy/samsung-usbphy.txt b/Documentation/devicetree/bindings/phy/samsung-usbphy.txt new file mode 100644 index 0000000..f618e8d --- /dev/null +++ b/Documentation/devicetree/bindings/phy/samsung-usbphy.txt @@ -0,0 +1,48 @@ +Samsung S5P/EXYNOS SoC series USB PHY +------------------------------------------------- + +Required properties: +- compatible : should be one of the listed compatibles: + - "samsung,exynos4210-usbphy" + - "samsung,exynos4212-usbphy" +- reg : a list of registers used by phy driver + - first and obligatory is the location of phy modules registers + - second and also required is the location of isolation registers + (isolation registers control the physical connection between the in + SoC modules and outside of the SoC, this also can be called enable + control in the documentation of the SoC) + - third is the location of the mode switch register, this only applies + to SoCs that have such a feature; mode switching enables to have + both host and device used the same SoC pins and is commonly used + when OTG is supported +- #phy-cells : from the generic phy bindings, must be 1; + +The second cell in the PHY specifier identifies the PHY its meaning is SoC +dependent. For the currently supported SoCs (Exynos 4210 and Exynos 4212) it +is as follows: + 0 - USB device, + 1 - USB host, + 2 - HSIC0, + 3 - HSIC1, + +Example: + +For Exynos 4412 (compatible with Exynos 4212): + +exynos_usbphy: exynos-usbphy@125B0000 { + compatible = "samsung,exynos4212-usbphy"; + reg = <0x125B0000 0x100>, <0x10020704 0x0c>, <0x1001021c 0x4>; + clocks = <&clock 305>, <&clock 2>, <&clock 2>, <&clock 2>, + <&clock 2>; + clock-names = "phy", "device", "host", "hsic0", "hsic1"; + status = "okay"; + #phy-cells = <1>; +}; + +Then the PHY can be used in other nodes such as: + +ehci@12580000 { + status = "okay"; + phys = <&exynos_usbphy 2>; + phy-names = "hsic0"; +}; diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 108c5f6..af3c422 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -21,4 +21,27 @@ config PHY_EXYNOS_MIPI_VIDEO Support for MIPI CSI-2 and MIPI DSI DPHY found on Samsung S5P and EXYNOS SoCs. +config PHY_EXYNOS_USB + tristate "Samsung USB PHY driver (using the Generic PHY Framework)" + help + Samsung USB PHY driver + + Enable this to support Samsung USB phy helper driver for Samsung SoCs. + This driver provides common interface to interact, for Samsung + USB 2.0 PHY driver. + +config PHY_EXYNOS4210_USB + bool "Support for Exynos 4210" + depends on PHY_EXYNOS_USB + depends on CPU_EXYNOS4210 + help + Enable USB PHY support for Exynos 4210 + +config PHY_EXYNOS4212_USB + bool "Support for Exynos 4212" + depends on PHY_EXYNOS_USB + depends on (SOC_EXYNOS4212 || SOC_EXYNOS4412) + help + Enable USB PHY support for Exynos 4212 + endmenu diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 71d8841..d75f932 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -4,3 +4,6 @@ obj-$(CONFIG_GENERIC_PHY) += phy-core.o obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o +obj-$(CONFIG_PHY_EXYNOS_USB) += phy-exynos-usb.o +obj-$(CONFIG_PHY_EXYNOS4210_USB) += phy-exynos4210-usb.o +obj-$(CONFIG_PHY_EXYNOS4212_USB) += phy-exynos4212-usb.o diff --git a/drivers/phy/phy-exynos-usb.c b/drivers/phy/phy-exynos-usb.c new file mode 100644 index 0000000..b15a19f --- /dev/null +++ b/drivers/phy/phy-exynos-usb.c @@ -0,0 +1,245 @@ +/* + * Samsung S5P/EXYNOS SoC series USB PHY driver + * + * Copyright (C) 2013 Samsung Electronics Co., Ltd. + * Author: Kamil Debski + * + * 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 +#include +#include "phy-exynos-usb.h" + +static int exynos_uphy_power_on(struct phy *phy) +{ + struct uphy_instance *inst = phy_get_drvdata(phy); + struct uphy_driver *drv = inst->drv; + int ret; + + dev_info(drv->dev, "Request to power_on \"%s\" usb phy\n", + inst->cfg->label); + ret = clk_prepare_enable(drv->clk); + if (ret) + return ret; + if (inst->cfg->power_on) { + spin_lock(&drv->lock); + ret = inst->cfg->power_on(inst); + spin_unlock(&drv->lock); + } + clk_disable_unprepare(drv->clk); + return ret; +} + +static int exynos_uphy_power_off(struct phy *phy) +{ + struct uphy_instance *inst = phy_get_drvdata(phy); + struct uphy_driver *drv = inst->drv; + int ret; + + dev_info(drv->dev, "Request to power_off \"%s\" usb phy\n", + inst->cfg->label); + ret = clk_prepare_enable(drv->clk); + if (ret) + return ret; + if (inst->cfg->power_off) { + spin_lock(&drv->lock); + ret = inst->cfg->power_off(inst); + spin_unlock(&drv->lock); + } + clk_disable_unprepare(drv->clk); + return ret; +} + +static struct phy_ops exynos_uphy_ops = { + .power_on = exynos_uphy_power_on, + .power_off = exynos_uphy_power_off, + .owner = THIS_MODULE, +}; + +static struct phy *exynos_uphy_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct uphy_driver *drv; + + drv = dev_get_drvdata(dev); + if (!drv) + return ERR_PTR(-EINVAL); + + if (WARN_ON(args->args[0] >= drv->cfg->num_phys)) + return ERR_PTR(-ENODEV); + + return drv->uphy_instances[args->args[0]].phy; +} + +static const struct of_device_id exynos_uphy_of_match[]; + +static int exynos_uphy_probe(struct platform_device *pdev) +{ + struct uphy_driver *drv; + struct device *dev = &pdev->dev; + struct resource *mem; + struct phy_provider *phy_provider; + + const struct of_device_id *match; + const struct uphy_config *cfg; + struct clk *clk; + + int i; + + match = of_match_node(exynos_uphy_of_match, pdev->dev.of_node); + if (!match) { + dev_err(dev, "of_match_node() failed\n"); + return -EINVAL; + } + cfg = match->data; + if (!cfg) { + dev_err(dev, "Failed to get configuration\n"); + return -EINVAL; + } + + drv = devm_kzalloc(dev, sizeof(struct uphy_driver) + + cfg->num_phys * sizeof(struct uphy_instance), GFP_KERNEL); + + if (!drv) { + dev_err(dev, "Failed to allocate memory\n"); + return -ENOMEM; + } + + dev_set_drvdata(dev, drv); + spin_lock_init(&drv->lock); + + drv->cfg = cfg; + drv->dev = dev; + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + drv->reg_phy = devm_ioremap_resource(dev, mem); + if (IS_ERR(drv->reg_phy)) { + dev_err(dev, "Failed to map register memory (phy)\n"); + return PTR_ERR(drv->reg_phy); + } + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 1); + drv->reg_isol = devm_ioremap_resource(dev, mem); + if (IS_ERR(drv->reg_isol)) { + dev_err(dev, "Failed to map register memory (isolation)\n"); + return PTR_ERR(drv->reg_isol); + } + + switch (drv->cfg->cpu) { + case TYPE_EXYNOS4210: + case TYPE_EXYNOS4212: + mem = platform_get_resource(pdev, IORESOURCE_MEM, 2); + drv->reg_mode = devm_ioremap_resource(dev, mem); + if (IS_ERR(drv->reg_mode)) { + dev_err(dev, "Failed to map register memory (mode switch)\n"); + return PTR_ERR(drv->reg_mode); + } + break; + default: + break; + } + + phy_provider = devm_of_phy_provider_register(dev, + exynos_uphy_xlate); + if (IS_ERR(phy_provider)) { + dev_err(drv->dev, "Failed to register phy provider\n"); + return PTR_ERR(phy_provider); + } + + drv->clk = devm_clk_get(dev, "phy"); + if (IS_ERR(drv->clk)) { + dev_err(dev, "Failed to get clock of phy controller\n"); + return PTR_ERR(drv->clk); + } + + for (i = 0; i < drv->cfg->num_phys; i++) { + char *label = drv->cfg->phys[i].label; + struct uphy_instance *p = &drv->uphy_instances[i]; + + dev_info(dev, "Creating phy \"%s\"\n", label); + p->phy = devm_phy_create(dev, &exynos_uphy_ops, NULL); + if (IS_ERR(p->phy)) { + dev_err(drv->dev, "Failed to create uphy \"%s\"\n", + label); + return PTR_ERR(p->phy); + } + + p->cfg = &drv->cfg->phys[i]; + p->drv = drv; + phy_set_drvdata(p->phy, p); + + clk = clk_get(dev, p->cfg->label); + if (IS_ERR(clk)) { + dev_err(dev, "Failed to get clock of \"%s\" phy\n", + p->cfg->label); + return PTR_ERR(drv->clk); + } + + p->rate = clk_get_rate(clk); + + if (p->cfg->rate_to_clk) { + p->clk = p->cfg->rate_to_clk(p->rate); + if (p->clk == CLKSEL_ERROR) { + dev_err(dev, "Clock rate (%ld) not supported\n", + p->rate); + clk_put(clk); + return -EINVAL; + } + } + clk_put(clk); + } + + return 0; +} + +#ifdef CONFIG_PHY_EXYNOS4210_USB +extern const struct uphy_config exynos4210_uphy_config; +#endif + +#ifdef CONFIG_PHY_EXYNOS4212_USB +extern const struct uphy_config exynos4212_uphy_config; +#endif + +static const struct of_device_id exynos_uphy_of_match[] = { +#ifdef CONFIG_PHY_EXYNOS4210_USB + { + .compatible = "samsung,exynos4210-usbphy", + .data = &exynos4210_uphy_config, + }, +#endif +#ifdef CONFIG_PHY_EXYNOS4212_USB + { + .compatible = "samsung,exynos4212-usbphy", + .data = &exynos4212_uphy_config, + }, +#endif + { }, +}; + +static struct platform_driver exynos_uphy_driver = { + .probe = exynos_uphy_probe, + .driver = { + .of_match_table = exynos_uphy_of_match, + .name = "exynos-usbphy-new", + .owner = THIS_MODULE, + } +}; + +module_platform_driver(exynos_uphy_driver); +MODULE_DESCRIPTION("Samsung S5P/EXYNOS SoC USB PHY driver"); +MODULE_AUTHOR("Kamil Debski "); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:exynos-uphy-new"); + diff --git a/drivers/phy/phy-exynos-usb.h b/drivers/phy/phy-exynos-usb.h new file mode 100644 index 0000000..597a02e --- /dev/null +++ b/drivers/phy/phy-exynos-usb.h @@ -0,0 +1,95 @@ +/* + * Samsung S5P/EXYNOS SoC series USB PHY driver + * + * Copyright (C) 2013 Samsung Electronics Co., Ltd. + * Author: Kamil Debski + * + * 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 _PHY_SAMSUNG_NEW_H +#define _PHY_SAMSUNG_NEW_H + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define CLKSEL_ERROR -1 + +#ifndef KHZ +#define KHZ 1000 +#endif + +#ifndef MHZ +#define MHZ (KHZ * KHZ) +#endif + +enum phy_type { + PHY_DEVICE, + PHY_HOST, +}; + +enum samsung_cpu_type { + TYPE_S3C64XX, + TYPE_EXYNOS4210, + TYPE_EXYNOS4212, + TYPE_EXYNOS5250, +}; + +enum uphy_state { + STATE_OFF, + STATE_ON, +}; + +struct uphy_driver; +struct uphy_instance; +struct uphy_config; + +struct uphy_instance { + struct uphy_driver *drv; + struct phy *phy; + const struct common_phy *cfg; + enum uphy_state state; + int ref_cnt; + u32 clk; + unsigned long rate; +}; + +struct uphy_driver { + struct device *dev; + spinlock_t lock; + void __iomem *reg_phy; + void __iomem *reg_isol; + void __iomem *reg_mode; + const struct uphy_config *cfg; + struct clk *clk; + struct uphy_instance uphy_instances[0]; +}; + +struct common_phy { + char *label; + enum phy_type type; + unsigned int id; + u32 (*rate_to_clk)(unsigned long); + int (*power_on)(struct uphy_instance *); + int (*power_off)(struct uphy_instance *); +}; + + +struct uphy_config { + enum samsung_cpu_type cpu; + int num_phys; + const struct common_phy *phys; +}; + +#endif + diff --git a/drivers/phy/phy-exynos4210-usb.c b/drivers/phy/phy-exynos4210-usb.c new file mode 100644 index 0000000..4b849e7 --- /dev/null +++ b/drivers/phy/phy-exynos4210-usb.c @@ -0,0 +1,315 @@ +/* + * Samsung S5P/EXYNOS SoC series USB PHY driver + * + * Copyright (C) 2013 Samsung Electronics Co., Ltd. + * Author: Kamil Debski + * + * 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 +#include +#include "phy-exynos-usb.h" + +/* Exynos USB PHY registers */ + +/* PHY power control */ +#define EXYNOS_4210_UPHYPWR 0x0 + +#define EXYNOS_4210_UPHYPWR_PHY0_SUSPEND (1 << 0) +#define EXYNOS_4210_UPHYPWR_PHY0_PWR (1 << 3) +#define EXYNOS_4210_UPHYPWR_PHY0_OTG_PWR (1 << 4) +#define EXYNOS_4210_UPHYPWR_PHY0_SLEEP (1 << 5) +#define EXYNOS_4210_UPHYPWR_PHY0 ( \ + EXYNOS_4210_UPHYPWR_PHY0_SUSPEND | \ + EXYNOS_4210_UPHYPWR_PHY0_PWR | \ + EXYNOS_4210_UPHYPWR_PHY0_OTG_PWR | \ + EXYNOS_4210_UPHYPWR_PHY0_SLEEP) + +#define EXYNOS_4210_UPHYPWR_PHY1_SUSPEND (1 << 6) +#define EXYNOS_4210_UPHYPWR_PHY1_PWR (1 << 7) +#define EXYNOS_4210_UPHYPWR_PHY1_SLEEP (1 << 8) +#define EXYNOS_4210_UPHYPWR_PHY1 ( \ + EXYNOS_4210_UPHYPWR_PHY1_SUSPEND | \ + EXYNOS_4210_UPHYPWR_PHY1_PWR | \ + EXYNOS_4210_UPHYPWR_PHY1_SLEEP) + +#define EXYNOS_4210_UPHYPWR_HSCI0_SUSPEND (1 << 9) +#define EXYNOS_4210_UPHYPWR_HSCI0_SLEEP (1 << 10) +#define EXYNOS_4210_UPHYPWR_HSCI0 ( \ + EXYNOS_4210_UPHYPWR_HSCI0_SUSPEND | \ + EXYNOS_4210_UPHYPWR_HSCI0_SLEEP) + +#define EXYNOS_4210_UPHYPWR_HSCI1_SUSPEND (1 << 11) +#define EXYNOS_4210_UPHYPWR_HSCI1_SLEEP (1 << 12) +#define EXYNOS_4210_UPHYPWR_HSCI1 ( \ + EXYNOS_4210_UPHYPWR_HSCI1_SUSPEND | \ + EXYNOS_4210_UPHYPWR_HSCI1_SLEEP) + +/* PHY clock control */ +#define EXYNOS_4210_UPHYCLK 0x4 + +#define EXYNOS_4210_UPHYCLK_PHYFSEL_MASK (0x3 << 0) +#define EXYNOS_4210_UPHYCLK_PHYFSEL_48MHZ (0x0 << 0) +#define EXYNOS_4210_UPHYCLK_PHYFSEL_24MHZ (0x3 << 0) +#define EXYNOS_4210_UPHYCLK_PHYFSEL_12MHZ (0x2 << 0) + +#define EXYNOS_4210_UPHYCLK_PHY0_ID_PULLUP (0x1 << 2) +#define EXYNOS_4210_UPHYCLK_PHY0_COMMON_ON (0x1 << 4) +#define EXYNOS_4210_UPHYCLK_PHY1_COMMON_ON (0x1 << 7) + +/* PHY reset control */ +#define EXYNOS_4210_UPHYRST 0x8 + +#define EXYNOS_4210_URSTCON_PHY0 (1 << 0) +#define EXYNOS_4210_URSTCON_OTG_HLINK (1 << 1) +#define EXYNOS_4210_URSTCON_OTG_PHYLINK (1 << 2) +#define EXYNOS_4210_URSTCON_PHY1_ALL (1 << 3) +#define EXYNOS_4210_URSTCON_PHY1_P0 (1 << 4) +#define EXYNOS_4210_URSTCON_PHY1_P1P2 (1 << 5) +#define EXYNOS_4210_URSTCON_HOST_LINK_ALL (1 << 6) +#define EXYNOS_4210_URSTCON_HOST_LINK_P0 (1 << 7) +#define EXYNOS_4210_URSTCON_HOST_LINK_P1 (1 << 8) +#define EXYNOS_4210_URSTCON_HOST_LINK_P2 (1 << 9) + +/* Isolation, configured in the power management unit */ +#define EXYNOS_4210_USB_ISOL_DEVICE_OFFSET 0x0 +#define EXYNOS_4210_USB_ISOL_DEVICE (1 << 0) +#define EXYNOS_4210_USB_ISOL_HOST_OFFSET 0x4 +#define EXYNOS_4210_USB_ISOL_HOST (1 << 0) + +/* USBYPHY1 Floating prevention */ +#define EXYNOS_4210_UPHY1CON 0x34 +#define EXYNOS_4210_UPHY1CON_FLOAT_PREVENTION 0x1 + +enum exynos4210_phy_id { + EXYNOS4210_DEVICE, + EXYNOS4210_HOST, + EXYNOS4210_HSIC0, + EXYNOS4210_HSIC1, + EXYNOS4210_NUM_PHYS, +}; + +/* exynos4210_rate_to_clk() converts the supplied clock rate to the value that + * can be written to the phy register. */ +static u32 exynos4210_rate_to_clk(unsigned long rate) +{ + unsigned int clksel; + + switch (rate) { + case 12 * MHZ: + clksel = EXYNOS_4210_UPHYCLK_PHYFSEL_12MHZ; + break; + case 24 * MHZ: + clksel = EXYNOS_4210_UPHYCLK_PHYFSEL_24MHZ; + break; + case 48 * MHZ: + clksel = EXYNOS_4210_UPHYCLK_PHYFSEL_48MHZ; + break; + default: + clksel = CLKSEL_ERROR; + } + + return clksel; +} + +static void exynos4210_isol(struct uphy_instance *inst, bool on) +{ + struct uphy_driver *drv = inst->drv; + u32 offset; + u32 mask; + u32 tmp; + + if (!drv->reg_isol) + return; + + switch (inst->cfg->id) { + case EXYNOS4210_DEVICE: + offset = EXYNOS_4210_USB_ISOL_DEVICE_OFFSET; + mask = EXYNOS_4210_USB_ISOL_DEVICE; + break; + case EXYNOS4210_HOST: + offset = EXYNOS_4210_USB_ISOL_HOST_OFFSET; + mask = EXYNOS_4210_USB_ISOL_HOST; + break; + default: + return; + }; + + tmp = readl(drv->reg_isol + offset); + if (on) + tmp &= ~mask; + else + tmp |= mask; + writel(tmp, drv->reg_isol + offset); +} + +static void exynos4210_phy_pwr(struct uphy_instance *inst, bool on) +{ + struct uphy_driver *drv = inst->drv; + u32 rstbits = 0; + u32 phypwr = 0; + u32 rst; + u32 pwr; + + switch (inst->cfg->id) { + case EXYNOS4210_DEVICE: + phypwr = EXYNOS_4210_UPHYPWR_PHY0; + rstbits = EXYNOS_4210_URSTCON_PHY0; + break; + case EXYNOS4210_HOST: + phypwr = EXYNOS_4210_UPHYPWR_PHY1; + rstbits = EXYNOS_4210_URSTCON_PHY1_ALL | + EXYNOS_4210_URSTCON_PHY1_P0 | + EXYNOS_4210_URSTCON_PHY1_P1P2 | + EXYNOS_4210_URSTCON_HOST_LINK_ALL | + EXYNOS_4210_URSTCON_HOST_LINK_P0; + writel(on, drv->reg_phy + EXYNOS_4210_UPHY1CON); + break; + case EXYNOS4210_HSIC0: + phypwr = EXYNOS_4210_UPHYPWR_HSCI0; + rstbits = EXYNOS_4210_URSTCON_PHY1_P1P2 | + EXYNOS_4210_URSTCON_HOST_LINK_P1; + break; + case EXYNOS4210_HSIC1: + phypwr = EXYNOS_4210_UPHYPWR_HSCI1; + rstbits = EXYNOS_4210_URSTCON_PHY1_P1P2 | + EXYNOS_4210_URSTCON_HOST_LINK_P2; + break; + }; + + if (on) { + writel(inst->clk, drv->reg_phy + EXYNOS_4210_UPHYCLK); + + pwr = readl(drv->reg_phy + EXYNOS_4210_UPHYPWR); + pwr &= ~phypwr; + writel(pwr, drv->reg_phy + EXYNOS_4210_UPHYPWR); + + rst = readl(drv->reg_phy + EXYNOS_4210_UPHYRST); + rst |= rstbits; + writel(rst, drv->reg_phy + EXYNOS_4210_UPHYRST); + udelay(10); + rst &= ~rstbits; + writel(rst, drv->reg_phy + EXYNOS_4210_UPHYRST); + } else { + pwr = readl(drv->reg_phy + EXYNOS_4210_UPHYPWR); + pwr |= phypwr; + writel(pwr, drv->reg_phy + EXYNOS_4210_UPHYPWR); + } +} + +static int exynos4210_power_on(struct uphy_instance *inst) +{ + struct uphy_driver *drv = inst->drv; + + if (inst->state == STATE_ON) { + dev_err(drv->dev, "usb phy \"%s\" already on", + inst->cfg->label); + return -ENODEV; + } + inst->state = STATE_ON; + inst->ref_cnt++; + if (inst->ref_cnt > 1) + return 0; + + exynos4210_isol(inst, 0); + exynos4210_phy_pwr(inst, 1); + + /* Power on the device, as it is necessary for HSIC to work */ + if (inst->cfg->id == EXYNOS4210_HOST) { + struct uphy_instance *device = + &drv->uphy_instances[EXYNOS4210_DEVICE]; + device->ref_cnt++; + if (device->ref_cnt > 1) + return 0; + exynos4210_phy_pwr(device, 1); + exynos4210_isol(device, 0); + } + + return 0; +} + +static int exynos4210_power_off(struct uphy_instance *inst) +{ + struct uphy_driver *drv = inst->drv; + + if (inst->state == STATE_OFF) { + dev_err(drv->dev, "usb phy \"%s\" already off", + inst->cfg->label); + return -EINVAL; + } + + inst->state = STATE_OFF; + inst->ref_cnt++; + if (inst->ref_cnt > 0) + return 0; + + exynos4210_phy_pwr(inst, 0); + exynos4210_isol(inst, 1); + + if (inst->cfg->id == EXYNOS4210_HOST) { + struct uphy_instance *device = + &drv->uphy_instances[EXYNOS4210_DEVICE]; + device->ref_cnt--; + if (device->ref_cnt > 0) + return 0; + exynos4210_phy_pwr(device, 0); + exynos4210_isol(device, 1); + } + + return 0; +} + + +static const struct common_phy exynos4210_phys[] = { + { + .label = "device", + .type = PHY_DEVICE, + .id = EXYNOS4210_DEVICE, + .rate_to_clk = exynos4210_rate_to_clk, + .power_on = exynos4210_power_on, + .power_off = exynos4210_power_off, + }, + { + .label = "host", + .type = PHY_HOST, + .id = EXYNOS4210_HOST, + .rate_to_clk = exynos4210_rate_to_clk, + .power_on = exynos4210_power_on, + .power_off = exynos4210_power_off, + }, + { + .label = "hsic0", + .type = PHY_HOST, + .id = EXYNOS4210_HSIC0, + .rate_to_clk = exynos4210_rate_to_clk, + .power_on = exynos4210_power_on, + .power_off = exynos4210_power_off, + }, + { + .label = "hsic1", + .type = PHY_HOST, + .id = EXYNOS4210_HSIC1, + .rate_to_clk = exynos4210_rate_to_clk, + .power_on = exynos4210_power_on, + .power_off = exynos4210_power_off, + }, + {}, +}; + +const struct uphy_config exynos4210_uphy_config = { + .cpu = TYPE_EXYNOS4210, + .num_phys = EXYNOS4210_NUM_PHYS, + .phys = exynos4210_phys, +}; + diff --git a/drivers/phy/phy-exynos4212-usb.c b/drivers/phy/phy-exynos4212-usb.c new file mode 100644 index 0000000..80480a4 --- /dev/null +++ b/drivers/phy/phy-exynos4212-usb.c @@ -0,0 +1,349 @@ +/* + * Samsung S5P/EXYNOS SoC series USB PHY driver + * + * Copyright (C) 2013 Samsung Electronics Co., Ltd. + * Author: Kamil Debski + * + * 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 +#include +#include "phy-exynos-usb.h" + +/* Exynos USB PHY registers */ + +/* PHY power control */ +#define EXYNOS_4212_UPHYPWR 0x0 + +#define EXYNOS_4212_UPHYPWR_DEV_SUSPEND (1 << 0) +#define EXYNOS_4212_UPHYPWR_DEV_PWR (1 << 3) +#define EXYNOS_4212_UPHYPWR_DEV_OTG_PWR (1 << 4) +#define EXYNOS_4212_UPHYPWR_DEV_SLEEP (1 << 5) +#define EXYNOS_4212_UPHYPWR_DEV ( \ + EXYNOS_4212_UPHYPWR_DEV_SUSPEND | \ + EXYNOS_4212_UPHYPWR_DEV_PWR | \ + EXYNOS_4212_UPHYPWR_DEV_OTG_PWR | \ + EXYNOS_4212_UPHYPWR_DEV_SLEEP) + +#define EXYNOS_4212_UPHYPWR_HOST_SUSPEND (1 << 6) +#define EXYNOS_4212_UPHYPWR_HOST_PWR (1 << 7) +#define EXYNOS_4212_UPHYPWR_HOST_SLEEP (1 << 8) +#define EXYNOS_4212_UPHYPWR_HOST ( \ + EXYNOS_4212_UPHYPWR_HOST_SUSPEND | \ + EXYNOS_4212_UPHYPWR_HOST_PWR | \ + EXYNOS_4212_UPHYPWR_HOST_SLEEP) + +#define EXYNOS_4212_UPHYPWR_HSCI0_SUSPEND (1 << 9) +#define EXYNOS_4212_UPHYPWR_HSCI0_PWR (1 << 10) +#define EXYNOS_4212_UPHYPWR_HSCI0_SLEEP (1 << 11) +#define EXYNOS_4212_UPHYPWR_HSCI0 ( \ + EXYNOS_4212_UPHYPWR_HSCI0_SUSPEND | \ + EXYNOS_4212_UPHYPWR_HSCI0_PWR | \ + EXYNOS_4212_UPHYPWR_HSCI0_SLEEP) + +#define EXYNOS_4212_UPHYPWR_HSCI1_SUSPEND (1 << 12) +#define EXYNOS_4212_UPHYPWR_HSCI1_PWR (1 << 13) +#define EXYNOS_4212_UPHYPWR_HSCI1_SLEEP (1 << 14) +#define EXYNOS_4212_UPHYPWR_HSCI1 ( \ + EXYNOS_4212_UPHYPWR_HSCI1_SUSPEND | \ + EXYNOS_4212_UPHYPWR_HSCI1_PWR | \ + EXYNOS_4212_UPHYPWR_HSCI1_SLEEP) + +/* PHY clock control */ +#define EXYNOS_4212_UPHYCLK 0x4 + +#define EXYNOS_4212_UPHYCLK_PHYFSEL_MASK (0x7 << 0) +#define EXYNOS_4212_UPHYCLK_PHYFSEL_9MHZ6 (0x0 << 0) +#define EXYNOS_4212_UPHYCLK_PHYFSEL_10MHZ (0x1 << 0) +#define EXYNOS_4212_UPHYCLK_PHYFSEL_12MHZ (0x2 << 0) +#define EXYNOS_4212_UPHYCLK_PHYFSEL_19MHZ2 (0x3 << 0) +#define EXYNOS_4212_UPHYCLK_PHYFSEL_20MHZ (0x4 << 0) +#define EXYNOS_4212_UPHYCLK_PHYFSEL_24MHZ (0x5 << 0) +#define EXYNOS_4212_UPHYCLK_PHYFSEL_50MHZ (0x7 << 0) + +#define EXYNOS_4212_UPHYCLK_PHY0_ID_PULLUP (0x1 << 3) +#define EXYNOS_4212_UPHYCLK_PHY0_COMMON_ON (0x1 << 4) +#define EXYNOS_4212_UPHYCLK_PHY1_COMMON_ON (0x1 << 7) + +#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_MASK (0x7f << 10) +#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_12MHZ (0x24 << 10) +#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_15MHZ (0x1c << 10) +#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_16MHZ (0x1a << 10) +#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_19MHZ2 (0x15 << 10) +#define EXYNOS_4212_UPHYCLK_HSIC_REFCLK_20MHZ (0x14 << 10) + +/* PHY reset control */ +#define EXYNOS_4212_UPHYRST 0x8 + +#define EXYNOS_4212_URSTCON_DEVICE (1 << 0) +#define EXYNOS_4212_URSTCON_OTG_HLINK (1 << 1) +#define EXYNOS_4212_URSTCON_OTG_PHYLINK (1 << 2) +#define EXYNOS_4212_URSTCON_HOST_PHY (1 << 3) +#define EXYNOS_4212_URSTCON_PHY1 (1 << 4) +#define EXYNOS_4212_URSTCON_HSIC0 (1 << 5) +#define EXYNOS_4212_URSTCON_HSIC1 (1 << 6) +#define EXYNOS_4212_URSTCON_HOST_LINK_ALL (1 << 7) +#define EXYNOS_4212_URSTCON_HOST_LINK_P0 (1 << 8) +#define EXYNOS_4212_URSTCON_HOST_LINK_P1 (1 << 9) +#define EXYNOS_4212_URSTCON_HOST_LINK_P2 (1 << 10) + +/* Isolation, configured in the power management unit */ +#define EXYNOS_4212_USB_ISOL_OFFSET 0x0 +#define EXYNOS_4212_USB_ISOL_OTG (1 << 0) +#define EXYNOS_4212_USB_ISOL_HSIC0_OFFSET 0x4 +#define EXYNOS_4212_USB_ISOL_HSIC0 (1 << 0) +#define EXYNOS_4212_USB_ISOL_HSIC1_OFFSET 0x8 +#define EXYNOS_4212_USB_ISOL_HSIC1 (1 << 0) + +enum exynos4x12_phy_id { + EXYNOS4212_DEVICE, + EXYNOS4212_HOST, + EXYNOS4212_HSIC0, + EXYNOS4212_HSIC1, + EXYNOS4212_NUM_PHYS, +}; + +/* exynos4212_rate_to_clk() converts the supplied clock rate to the value that + * can be written to the phy register. */ +static u32 exynos4212_rate_to_clk(unsigned long rate) +{ + unsigned int clksel; + + /* EXYNOS_4212_UPHYCLK_PHYFSEL_MASK */ + + switch (rate) { + case 9600 * KHZ: + clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_9MHZ6; + break; + case 10 * MHZ: + clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_10MHZ; + break; + case 12 * MHZ: + clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_12MHZ; + break; + case 19200 * KHZ: + clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_19MHZ2; + break; + case 20 * MHZ: + clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_20MHZ; + break; + case 24 * MHZ: + clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_24MHZ; + break; + case 50 * MHZ: + clksel = EXYNOS_4212_UPHYCLK_PHYFSEL_50MHZ; + break; + default: + clksel = CLKSEL_ERROR; + } + + return clksel; +} + +static void exynos4212_isol(struct uphy_instance *inst, bool on) +{ + struct uphy_driver *drv = inst->drv; + u32 offset; + u32 mask; + u32 tmp; + + if (!drv->reg_isol) + return; + + switch (inst->cfg->id) { + case EXYNOS4212_DEVICE: + offset = EXYNOS_4212_USB_ISOL_OFFSET; + mask = EXYNOS_4212_USB_ISOL_OTG; + break; + case EXYNOS4212_HOST: + offset = EXYNOS_4212_USB_ISOL_OFFSET; + mask = EXYNOS_4212_USB_ISOL_OTG; + break; + case EXYNOS4212_HSIC0: + offset = EXYNOS_4212_USB_ISOL_HSIC0_OFFSET; + mask = EXYNOS_4212_USB_ISOL_HSIC0; + break; + case EXYNOS4212_HSIC1: + offset = EXYNOS_4212_USB_ISOL_HSIC1_OFFSET; + mask = EXYNOS_4212_USB_ISOL_HSIC1; + break; + default: + return; + }; + + tmp = readl(drv->reg_isol + offset); + if (on) + tmp &= ~mask; + else + tmp |= mask; + writel(tmp, drv->reg_isol + offset); +} + +static void exynos4212_phy_pwr(struct uphy_instance *inst, bool on) +{ + struct uphy_driver *drv = inst->drv; + u32 rstbits = 0; + u32 phypwr = 0; + u32 rst; + u32 pwr; + + switch (inst->cfg->id) { + case EXYNOS4212_DEVICE: + phypwr = EXYNOS_4212_UPHYPWR_DEV; + rstbits = EXYNOS_4212_URSTCON_DEVICE; + break; + case EXYNOS4212_HOST: + phypwr = EXYNOS_4212_UPHYPWR_HOST; + rstbits = EXYNOS_4212_URSTCON_HOST_PHY; + break; + case EXYNOS4212_HSIC0: + phypwr = EXYNOS_4212_UPHYPWR_HSCI0; + rstbits = EXYNOS_4212_URSTCON_HSIC1 | + EXYNOS_4212_URSTCON_HOST_LINK_P0 | + EXYNOS_4212_URSTCON_HOST_PHY; + break; + case EXYNOS4212_HSIC1: + phypwr = EXYNOS_4212_UPHYPWR_HSCI1; + rstbits = EXYNOS_4212_URSTCON_HSIC1 | + EXYNOS_4212_URSTCON_HOST_LINK_P1; + break; + }; + + if (on) { + writel(inst->clk, drv->reg_phy + EXYNOS_4212_UPHYCLK); + + pwr = readl(drv->reg_phy + EXYNOS_4212_UPHYPWR); + pwr &= ~phypwr; + writel(pwr, drv->reg_phy + EXYNOS_4212_UPHYPWR); + + rst = readl(drv->reg_phy + EXYNOS_4212_UPHYRST); + rst |= rstbits; + writel(rst, drv->reg_phy + EXYNOS_4212_UPHYRST); + udelay(10); + rst &= ~rstbits; + writel(rst, drv->reg_phy + EXYNOS_4212_UPHYRST); + } else { + pwr = readl(drv->reg_phy + EXYNOS_4212_UPHYPWR); + pwr |= phypwr; + writel(pwr, drv->reg_phy + EXYNOS_4212_UPHYPWR); + } +} + +static int exynos4212_power_on(struct uphy_instance *inst) +{ + struct uphy_driver *drv = inst->drv; + + if (inst->state == STATE_ON) { + dev_err(drv->dev, "usb phy \"%s\" already on", + inst->cfg->label); + return -ENODEV; + } + + inst->state = STATE_ON; + inst->ref_cnt++; + if (inst->ref_cnt > 1) + return 0; + + exynos4212_isol(inst, 0); + exynos4212_phy_pwr(inst, 1); + + /* Power on the device, as it is necessary for HSIC to work */ + if (inst->cfg->id == EXYNOS4212_HSIC0) { + struct uphy_instance *device = + &drv->uphy_instances[EXYNOS4212_DEVICE]; + device->ref_cnt++; + if (device->ref_cnt > 1) + return 0; + exynos4212_phy_pwr(device, 1); + exynos4212_isol(device, 0); + } + + return 0; +} + +static int exynos4212_power_off(struct uphy_instance *inst) +{ + struct uphy_driver *drv = inst->drv; + + if (inst->state == STATE_OFF) { + dev_err(drv->dev, "usb phy \"%s\" already off", + inst->cfg->label); + return -EINVAL; + } + + inst->state = STATE_OFF; + inst->ref_cnt--; + + if (inst->ref_cnt > 0) + return 0; + + exynos4212_phy_pwr(inst, 0); + exynos4212_isol(inst, 1); + + if (inst->cfg->id == EXYNOS4212_HSIC0) { + struct uphy_instance *device = + &drv->uphy_instances[EXYNOS4212_DEVICE]; + device->ref_cnt--; + if (device->ref_cnt > 0) + return 0; + exynos4212_phy_pwr(device, 0); + exynos4212_isol(device, 1); + } + + return 0; +} + + +static const struct common_phy exynos4212_phys[] = { + { + .label = "device", + .type = PHY_DEVICE, + .id = EXYNOS4212_DEVICE, + .rate_to_clk = exynos4212_rate_to_clk, + .power_on = exynos4212_power_on, + .power_off = exynos4212_power_off, + }, + { + .label = "host", + .type = PHY_HOST, + .id = EXYNOS4212_HOST, + .rate_to_clk = exynos4212_rate_to_clk, + .power_on = exynos4212_power_on, + .power_off = exynos4212_power_off, + }, + { + .label = "hsic0", + .type = PHY_HOST, + .id = EXYNOS4212_HSIC0, + .rate_to_clk = exynos4212_rate_to_clk, + .power_on = exynos4212_power_on, + .power_off = exynos4212_power_off, + }, + { + .label = "hsic1", + .type = PHY_HOST, + .id = EXYNOS4212_HSIC1, + .rate_to_clk = exynos4212_rate_to_clk, + .power_on = exynos4212_power_on, + .power_off = exynos4212_power_off, + }, + {}, +}; + +const struct uphy_config exynos4212_uphy_config = { + .cpu = TYPE_EXYNOS4212, + .num_phys = EXYNOS4212_NUM_PHYS, + .phys = exynos4212_phys, +}; + -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/