From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757598Ab3LFKcE (ORCPT ); Fri, 6 Dec 2013 05:32:04 -0500 Received: from mailout1.samsung.com ([203.254.224.24]:54281 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754481Ab3LFKcA (ORCPT ); Fri, 6 Dec 2013 05:32:00 -0500 X-AuditID: cbfee61a-b7f796d000004313-5e-52a1a79e6636 From: Kamil Debski To: linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-usb@vger.kernel.org, devicetree@vger.kernel.org Cc: kyungmin.park@samsung.com, kishon@ti.com, t.figa@samsung.com, s.nawrocki@samsung.com, m.szyprowski@samsung.com, gautam.vivek@samsung.com, mat.krawczuk@gmail.com, yulgon.kim@samsung.com, p.paneri@samsung.com, av.tikhomirov@samsung.com, jg1.han@samsung.com, galak@codeaurora.org, matt.porter@linaro.org, k.debski@samsung.com Subject: [PATCH v4 6/9] phy: Add support for S5PV210 to the Exynos USB PHY driver Date: Fri, 06 Dec 2013 11:31:37 +0100 Message-id: <1386325897-27260-1-git-send-email-k.debski@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1386246579-25141-1-git-send-email-k.debski@samsung.com> References: <1386246579-25141-1-git-send-email-k.debski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrDLMWRmVeSWpSXmKPExsVy+t9jQd35yxcGGbzfwm2xZPcNVov5R86x WvS/Wchq0XblILvF5YWXWC1+vL7AZnHhaQ+bxdmmN0CxXXPYLGac38dksWhZK7PF2iN32S3O 9t9ms5jYNI3d4vyWTiaLw2/aWS3Wz3jNYtFx9iC7g5DH5b5eJo+ds+6ye9y5tofNo2/LKkaP 4ze2M3l83iQXwBbFZZOSmpNZllqkb5fAlfHg5yPmglfuFX8/7WNsYJxt3cXIySEhYCLR3bSN EcIWk7hwbz1bFyMXh5DAdEaJ39vusEM4HUwSiyY9Y+li5OBgE9CUWHXPA6RBRKBGYsqtK+wg NrPAOSaJmwuZQWxhgWCJH087mUBsFgFVicWNbUwgrbwCLhKfnweAmBICChJzJtmAVHAKuEqs nHiYDSQsBFSx5ormBEbeBYwMqxhFUwuSC4qT0nMN9YoTc4tL89L1kvNzNzGCw/iZ1A7GlQ0W hxgFOBiVeHg5Vi0IEmJNLCuuzD3EKMHBrCTC2zNvYZAQb0piZVVqUX58UWlOavEhRmkOFiVx 3gOt1oFCAumJJanZqakFqUUwWSYOTqkGRr/vp35PZ/+76PfHVbMLly3fese4R66as3ThBoUb Jyt2HX/TwGOvmScT+KMq7VCMZcnm5uR7K0P+BKsLCd7g2tXBrr/ba0vdlMp/LAacqxS9Wll2 JstNuB4+zb7j2S+hqUmu8isFRAWqvcLnx30X5lWJ1OV4qzx1/fZg9R0PC8/8NZrIMP28pBJL cUaioRZzUXEiABDUzhRfAgAA Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mateusz Krawczuk Add support for the Samsung's S5PV210 SoC to the Exynos USB PHY driver. Signed-off-by: Mateusz Krawczuk [k.debski@samsung.com: cleanup and commit description] [k.debski@samsung.com: make changes accordingly to the mailing list comments] Signed-off-by: Kamil Debski Signed-off-by: Kyungmin Park --- .../devicetree/bindings/phy/samsung-usbphy.txt | 1 + drivers/phy/Kconfig | 7 + drivers/phy/Makefile | 1 + drivers/phy/phy-s5pv210-usb2.c | 206 ++++++++++++++++++++ drivers/phy/phy-samsung-usb2.c | 6 + drivers/phy/phy-samsung-usb2.h | 1 + 6 files changed, 222 insertions(+) create mode 100644 drivers/phy/phy-s5pv210-usb2.c diff --git a/Documentation/devicetree/bindings/phy/samsung-usbphy.txt b/Documentation/devicetree/bindings/phy/samsung-usbphy.txt index cadbf70..77a8e9c 100644 --- a/Documentation/devicetree/bindings/phy/samsung-usbphy.txt +++ b/Documentation/devicetree/bindings/phy/samsung-usbphy.txt @@ -3,6 +3,7 @@ Samsung S5P/EXYNOS SoC series USB PHY Required properties: - compatible : should be one of the listed compatibles: + - "samsung,s5pv210-usb2-phy" - "samsung,exynos4210-usb2-phy" - "samsung,exynos4212-usb2-phy" - reg : a list of registers used by phy driver diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index b29018f..2e433cd 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -58,6 +58,13 @@ config PHY_SAMSUNG_USB2 This driver provides common interface to interact, for Samsung USB 2.0 PHY driver. +config PHY_S5PV210_USB2 + bool "Support for S5PV210" + depends on PHY_SAMSUNG_USB2 + depends on ARCH_S5PV210 + help + Enable USB PHY support for S5PV210 + config PHY_EXYNOS4210_USB2 bool "Support for Exynos 4210" depends on PHY_SAMSUNG_USB2 diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 9f4befd..fefc6c2 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -8,5 +8,6 @@ obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o obj-$(CONFIG_PHY_SAMSUNG_USB2) += phy-samsung-usb2.o +obj-$(CONFIG_PHY_S5PV210_USB2) += phy-s5pv210-usb2.o obj-$(CONFIG_PHY_EXYNOS4210_USB2) += phy-exynos4210-usb2.o obj-$(CONFIG_PHY_EXYNOS4212_USB2) += phy-exynos4212-usb2.o diff --git a/drivers/phy/phy-s5pv210-usb2.c b/drivers/phy/phy-s5pv210-usb2.c new file mode 100644 index 0000000..528a114 --- /dev/null +++ b/drivers/phy/phy-s5pv210-usb2.c @@ -0,0 +1,206 @@ +/* + * Samsung SoC USB 1.1/2.0 PHY driver - S5PV210 support + * + * Copyright (C) 2013 Samsung Electronics Co., Ltd. + * Authors: 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-samsung-usb2.h" + +/* Exynos USB PHY registers */ + +/* PHY power control */ +#define S5PV210_UPHYPWR 0x0 + +#define S5PV210_UPHYPWR_PHY0_SUSPEND (1 << 0) +#define S5PV210_UPHYPWR_PHY0_PWR (1 << 3) +#define S5PV210_UPHYPWR_PHY0_OTG_PWR (1 << 4) +#define S5PV210_UPHYPWR_PHY0 ( \ + S5PV210_UPHYPWR_PHY0_SUSPEND | \ + S5PV210_UPHYPWR_PHY0_PWR | \ + S5PV210_UPHYPWR_PHY0_OTG_PWR) + +#define S5PV210_UPHYPWR_PHY1_SUSPEND (1 << 6) +#define S5PV210_UPHYPWR_PHY1_PWR (1 << 7) +#define S5PV210_UPHYPWR_PHY1 ( \ + S5PV210_UPHYPWR_PHY1_SUSPEND | \ + S5PV210_UPHYPWR_PHY1_PWR) + +/* PHY clock control */ +#define S5PV210_UPHYCLK 0x4 + +#define S5PV210_UPHYCLK_PHYFSEL_MASK (0x3 << 0) +#define S5PV210_UPHYCLK_PHYFSEL_48MHZ (0x0 << 0) +#define S5PV210_UPHYCLK_PHYFSEL_24MHZ (0x3 << 0) +#define S5PV210_UPHYCLK_PHYFSEL_12MHZ (0x2 << 0) + +#define S5PV210_UPHYCLK_PHY0_ID_PULLUP (0x1 << 2) +#define S5PV210_UPHYCLK_PHY0_COMMON_ON (0x1 << 4) +#define S5PV210_UPHYCLK_PHY1_COMMON_ON (0x1 << 7) + +/* PHY reset control */ +#define S5PV210_UPHYRST 0x8 + +#define S5PV210_URSTCON_PHY0 (1 << 0) +#define S5PV210_URSTCON_OTG_HLINK (1 << 1) +#define S5PV210_URSTCON_OTG_PHYLINK (1 << 2) +#define S5PV210_URSTCON_PHY1_ALL (1 << 3) +#define S5PV210_URSTCON_HOST_LINK_ALL (1 << 4) + +/* Isolation, configured in the power management unit */ +#define S5PV210_USB_ISOL_DEVICE_OFFSET 0x704 +#define S5PV210_USB_ISOL_DEVICE (1 << 0) +#define S5PV210_USB_ISOL_HOST_OFFSET 0x708 +#define S5PV210_USB_ISOL_HOST (1 << 1) + + +enum s5pv210_phy_id { + S5PV210_DEVICE, + S5PV210_HOST, + S5PV210_NUM_PHYS, +}; + +/* + * s5pv210_rate_to_clk() converts the supplied clock rate to the value that + * can be written to the phy register. + */ +static int s5pv210_rate_to_clk(unsigned long rate, u32 *reg) +{ + pr_info("%lu\n", rate); + switch (rate) { + case 12 * MHZ: + *reg = S5PV210_UPHYCLK_PHYFSEL_12MHZ; + break; + case 24 * MHZ: + *reg = S5PV210_UPHYCLK_PHYFSEL_24MHZ; + break; + case 48 * MHZ: + *reg = S5PV210_UPHYCLK_PHYFSEL_48MHZ; + break; + default: + return -EINVAL; + } +} + +static void s5pv210_isol(struct samsung_usb2_phy_instance *inst, bool on) +{ + struct samsung_usb2_phy_driver *drv = inst->drv; + u32 mask; + u32 tmp; + + if (!drv->reg_isol) + return; + + switch (inst->cfg->id) { + case S5PV210_DEVICE: + mask = S5PV210_USB_ISOL_DEVICE; + break; + case S5PV210_HOST: + mask = S5PV210_USB_ISOL_HOST; + break; + default: + return; + }; + + regmap_update_bits(drv->reg_pmu, offset, mask, on ? 0 : mask); +} + +static void s5pv210_phy_pwr(struct samsung_usb2_phy_instance *inst, bool on) +{ + struct samsung_usb2_phy_driver *drv = inst->drv; + u32 rstbits = 0; + u32 phypwr = 0; + u32 rst; + u32 pwr; + + switch (inst->cfg->id) { + case S5PV210_DEVICE: + phypwr = S5PV210_UPHYPWR_PHY0; + rstbits = S5PV210_URSTCON_PHY0; + break; + case S5PV210_HOST: + phypwr = S5PV210_UPHYPWR_PHY1; + rstbits = S5PV210_URSTCON_PHY1_ALL | + S5PV210_URSTCON_HOST_LINK_ALL; + break; + }; + + if (on) { + writel(inst->clk, drv->reg_phy + S5PV210_UPHYCLK); + + pwr = readl(drv->reg_phy + S5PV210_UPHYPWR); + pwr &= ~phypwr; + writel(pwr, drv->reg_phy + S5PV210_UPHYPWR); + + rst = readl(drv->reg_phy + S5PV210_UPHYRST); + rst |= rstbits; + writel(rst, drv->reg_phy + S5PV210_UPHYRST); + udelay(10); + rst &= ~rstbits; + writel(rst, drv->reg_phy + S5PV210_UPHYRST); + } else { + pwr = readl(drv->reg_phy + S5PV210_UPHYPWR); + pwr |= phypwr; + writel(pwr, drv->reg_phy + S5PV210_UPHYPWR); + } +} + +static int s5pv210_power_on(struct samsung_usb2_phy_instance *inst) +{ + struct samsung_usb2_phy_driver *drv = inst->drv; + + s5pv210_isol(inst, 0); + s5pv210_phy_pwr(inst, 1); + + return 0; +} + +static int s5pv210_power_off(struct samsung_usb2_phy_instance *inst) +{ + struct samsung_usb2_phy_driver *drv = inst->drv; + + s5pv210_phy_pwr(inst, 0); + s5pv210_isol(inst, 1); + + return 0; +} + + +static const struct samsung_usb2_common_phy s5pv210_phys[] = { + { + .label = "device", + .id = S5PV210_DEVICE, + .rate_to_clk = s5pv210_rate_to_clk, + .power_on = s5pv210_power_on, + .power_off = s5pv210_power_off, + }, + { + .label = "host", + .id = S5PV210_HOST, + .rate_to_clk = s5pv210_rate_to_clk, + .power_on = s5pv210_power_on, + .power_off = s5pv210_power_off, + }, + {}, +}; + +const struct samsung_usb2_phy_config s5pv210_usb2_phy_config = { + .cpu = TYPE_S5PV210, + .num_phys = S5PV210_NUM_PHYS, + .phys = s5pv210_phys, +}; + diff --git a/drivers/phy/phy-samsung-usb2.c b/drivers/phy/phy-samsung-usb2.c index 804ec77..ef93fd3 100644 --- a/drivers/phy/phy-samsung-usb2.c +++ b/drivers/phy/phy-samsung-usb2.c @@ -98,6 +98,12 @@ static struct phy *samsung_usb2_phy_xlate(struct device *dev, } static const struct of_device_id samsung_usb2_phy_of_match[] = { +#ifdef CONFIG_PHY_S5PV210_USB2 + { + .compatible = "samsung,s5pv210-usb2-phy", + .data = &s5pv210_usb2_phy_config, + }, +#endif #ifdef CONFIG_PHY_EXYNOS4210_USB2 { .compatible = "samsung,exynos4210-usb2-phy", diff --git a/drivers/phy/phy-samsung-usb2.h b/drivers/phy/phy-samsung-usb2.h index cd12477..0f51dbb 100644 --- a/drivers/phy/phy-samsung-usb2.h +++ b/drivers/phy/phy-samsung-usb2.h @@ -66,6 +66,7 @@ struct samsung_usb2_phy_config { char has_mode_switch; }; +extern const struct samsung_usb2_phy_config s5pv210_usb2_phy_config; extern const struct samsung_usb2_phy_config exynos4210_usb2_phy_config; extern const struct samsung_usb2_phy_config exynos4212_usb2_phy_config; #endif -- 1.7.9.5