Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752943AbaA2Raw (ORCPT ); Wed, 29 Jan 2014 12:30:52 -0500 Received: from mailout4.samsung.com ([203.254.224.34]:33416 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752632AbaA2Ra3 (ORCPT ); Wed, 29 Jan 2014 12:30:29 -0500 X-AuditID: cbfee61b-b7f456d000006dfd-83-52e93ab43d9d 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, tjakobi@math.uni-bielefeld.de, stern@rowland.harvard.edu Subject: [PATCH v6 6/8] phy: Add support for S5PV210 to the Exynos USB PHY driver Date: Wed, 29 Jan 2014 18:29:32 +0100 Message-id: <1391016574-25237-7-git-send-email-k.debski@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1391016574-25237-1-git-send-email-k.debski@samsung.com> References: <1391016574-25237-1-git-send-email-k.debski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrILMWRmVeSWpSXmKPExsVy+t9jAd0tVi+DDL5917JYsvsGq8X8I+dY LfrfLGS1aLtykN3i8sJLrBY/Xl9gs7jwtIfN4mzTG6DYrjlsFjPO72OyWLSsldli7ZG77BZn +2+zWUxsmsZucX5LJ5PF4TftrBYTfgO1rZ/xmsWibfUHVouOswfZHUQ8Lvf1MnnsnHWX3ePO tT1sHv+OsXvMvvuD0aNvyypGj+M3tjN5fN4kF8ARxWWTkpqTWZZapG+XwJXR1PGBseCpe8WF D6cYGxj7rbsYOTkkBEwkfp37wAhhi0lcuLeerYuRi0NIYBGjxON9L9khnA4miVWHDrN2MXJw sAloSqy65wHSICJQIzHl1hWwGmaBLmaJCdtOs4HUCAsES7w5ZQZSwyKgKvFo4yY2EJtXwEXi 083/LCAlEgIKEnMm2YCEOQVcJTpmXAQrEQIqWd2zhm0CI+8CRoZVjKKpBckFxUnpuUZ6xYm5 xaV56XrJ+bmbGMEB/0x6B+OqBotDjAIcjEo8vCsuPg8SYk0sK67MPcQowcGsJMIbZfgySIg3 JbGyKrUoP76oNCe1+BCjNAeLkjjvwVbrQCGB9MSS1OzU1ILUIpgsEwenVANj8smlXFMXaHhP KykTSwyMytZ8O9fVw996ZaPtKX2xB4FbRA9tZepyE7cu6dP0KXnWvWp3TkLrludns3d5cU1Q uyd849W2wzs+HDCsD5sccF/UxOCH0aLYwAk2Tn4X63pq30TGTXELC3xfXrhH0iduccAapjaO /ofNxxYwOvqsztSqEi/4+02JpTgj0VCLuag4EQCbEYIvdAIAAA== 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] [k.debski@samsung.com: fix bug with setting of clk register] Signed-off-by: Kamil Debski --- .../devicetree/bindings/phy/samsung-phy.txt | 1 + drivers/phy/Kconfig | 10 + drivers/phy/Makefile | 1 + drivers/phy/phy-s5pv210-usb2.c | 199 ++++++++++++++++++++ drivers/phy/phy-samsung-usb2.c | 6 + drivers/phy/phy-samsung-usb2.h | 1 + 6 files changed, 218 insertions(+) create mode 100644 drivers/phy/phy-s5pv210-usb2.c diff --git a/Documentation/devicetree/bindings/phy/samsung-phy.txt b/Documentation/devicetree/bindings/phy/samsung-phy.txt index 6668c41..710d41f 100644 --- a/Documentation/devicetree/bindings/phy/samsung-phy.txt +++ b/Documentation/devicetree/bindings/phy/samsung-phy.txt @@ -26,6 +26,7 @@ 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,exynos4x12-usb2-phy" - reg : a list of registers used by phy driver diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 3691d24..a5554b5 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -73,6 +73,16 @@ config PHY_SAMSUNG_USB2 particular SoCs has to be enabled in addition to this driver. Number and type of supported phys depends on the SoC. +config PHY_S5PV210_USB2 + bool "Support for S5PV210" + depends on PHY_SAMSUNG_USB2 + depends on ARCH_S5PV210 + help + Enable USB PHY support for S5PV210. This option requires that Samsung + USB 2.0 PHY driver is enabled and means that support for this + particular SoC is compiled in the driver. In case of S5PV210 two phys + are available - device and host. + 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 69d0b3f2..d738f65 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -10,5 +10,6 @@ obj-$(CONFIG_PHY_MVEBU_SATA) += phy-mvebu-sata.o obj-$(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_EXYNOS4X12_USB2) += phy-exynos4x12-usb2.o diff --git a/drivers/phy/phy-s5pv210-usb2.c b/drivers/phy/phy-s5pv210-usb2.c new file mode 100644 index 0000000..08e5094 --- /dev/null +++ b/drivers/phy/phy-s5pv210-usb2.c @@ -0,0 +1,199 @@ +/* + * 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 "phy-samsung-usb2.h" + +/* Exynos USB PHY registers */ + +/* PHY power control */ +#define S5PV210_UPHYPWR 0x0 + +#define S5PV210_UPHYPWR_PHY0_SUSPEND BIT(0) +#define S5PV210_UPHYPWR_PHY0_PWR BIT(3) +#define S5PV210_UPHYPWR_PHY0_OTG_PWR BIT(4) +#define S5PV210_UPHYPWR_PHY0 ( \ + S5PV210_UPHYPWR_PHY0_SUSPEND | \ + S5PV210_UPHYPWR_PHY0_PWR | \ + S5PV210_UPHYPWR_PHY0_OTG_PWR) + +#define S5PV210_UPHYPWR_PHY1_SUSPEND BIT(6) +#define S5PV210_UPHYPWR_PHY1_PWR BIT(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 BIT(2) +#define S5PV210_UPHYCLK_PHY0_COMMON_ON BIT(4) +#define S5PV210_UPHYCLK_PHY1_COMMON_ON BIT(7) + +/* PHY reset control */ +#define S5PV210_UPHYRST 0x8 + +#define S5PV210_URSTCON_PHY0 BIT(0) +#define S5PV210_URSTCON_OTG_HLINK BIT(1) +#define S5PV210_URSTCON_OTG_PHYLINK BIT(2) +#define S5PV210_URSTCON_PHY1_ALL BIT(3) +#define S5PV210_URSTCON_HOST_LINK_ALL BIT(4) + +/* Isolation, configured in the power management unit */ +#define S5PV210_USB_ISOL_DEVICE_OFFSET 0x704 +#define S5PV210_USB_ISOL_DEVICE BIT(0) +#define S5PV210_USB_ISOL_HOST_OFFSET 0x708 +#define S5PV210_USB_ISOL_HOST BIT(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_reg_val, 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 c1b0fd5..3e48f17 100644 --- a/drivers/phy/phy-samsung-usb2.c +++ b/drivers/phy/phy-samsung-usb2.c @@ -95,6 +95,12 @@ 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 868dd33..ae41d0f 100644 --- a/drivers/phy/phy-samsung-usb2.h +++ b/drivers/phy/phy-samsung-usb2.h @@ -61,6 +61,7 @@ struct samsung_usb2_phy_config { bool 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 exynos4x12_usb2_phy_config; #endif -- 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/