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Date: Thu, 6 Mar 2014 15:00:06 +0530
From: Kishon Vijay Abraham I <kishon@...com>
To: <bcousson@...libre.com>, <balbi@...com>,
<devicetree@...r.kernel.org>, <linux-doc@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-usb@...r.kernel.org>, <george.cherian@...com>,
<heikki.krogerus@...ux.intel.com>, <rogerq@...com>
CC: <rob.herring@...xeda.com>, <pawel.moll@....com>,
<mark.rutland@....com>, <swarren@...dotorg.org>,
<ijc+devicetree@...lion.org.uk>, <rob@...dley.net>,
<tony@...mide.com>, <linux@....linux.org.uk>,
<gregkh@...uxfoundation.org>, <grant.likely@...aro.org>,
<s.nawrocki@...sung.com>, <galak@...eaurora.org>
Subject: Re: [PATCH v5 3/6] drivers: phy: usb3/pipe3: Adapt pipe3 driver to
Generic PHY Framework
On Monday 03 March 2014 05:08 PM, Kishon Vijay Abraham I wrote:
> Adapted omap-usb3 PHY driver to Generic PHY Framework and moved phy-omap-usb3
> driver in drivers/usb/phy to drivers/phy and also renamed the file to
> phy-ti-pipe3 since this same driver will be used for SATA PHY and
> PCIE PHY.
merged 3rd, 4th and 5th patch of this series to linux-phy next.
Thanks
Kishon
>
> Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
> ---
> drivers/phy/Kconfig | 11 +
> drivers/phy/Makefile | 1 +
> .../phy/phy-omap-usb3.c => phy/phy-ti-pipe3.c} | 240 ++++++++++++--------
> drivers/usb/phy/Kconfig | 11 -
> drivers/usb/phy/Makefile | 1 -
> 5 files changed, 158 insertions(+), 106 deletions(-)
> rename drivers/{usb/phy/phy-omap-usb3.c => phy/phy-ti-pipe3.c} (54%)
>
> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> index c7a551c..e3ec7d1 100644
> --- a/drivers/phy/Kconfig
> +++ b/drivers/phy/Kconfig
> @@ -40,6 +40,17 @@ config OMAP_USB2
> The USB OTG controller communicates with the comparator using this
> driver.
>
> +config TI_PIPE3
> + tristate "TI PIPE3 PHY Driver"
> + depends on ARCH_OMAP2PLUS || COMPILE_TEST
> + select GENERIC_PHY
> + select OMAP_CONTROL_USB
> + help
> + Enable this to support the PIPE3 PHY that is part of TI SOCs. This
> + driver takes care of all the PHY functionality apart from comparator.
> + This driver interacts with the "OMAP Control PHY Driver" to power
> + on/off the PHY.
> +
> config TWL4030_USB
> tristate "TWL4030 USB Transceiver Driver"
> depends on TWL4030_CORE && REGULATOR_TWL4030 && USB_MUSB_OMAP2PLUS
> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
> index b57c253..32e3f94 100644
> --- a/drivers/phy/Makefile
> +++ b/drivers/phy/Makefile
> @@ -8,4 +8,5 @@ obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o
> obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o
> obj-$(CONFIG_PHY_MVEBU_SATA) += phy-mvebu-sata.o
> obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o
> +obj-$(CONFIG_TI_PIPE3) += phy-ti-pipe3.o
> obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o
> diff --git a/drivers/usb/phy/phy-omap-usb3.c b/drivers/phy/phy-ti-pipe3.c
> similarity index 54%
> rename from drivers/usb/phy/phy-omap-usb3.c
> rename to drivers/phy/phy-ti-pipe3.c
> index 0c6ba29..67b189d 100644
> --- a/drivers/usb/phy/phy-omap-usb3.c
> +++ b/drivers/phy/phy-ti-pipe3.c
> @@ -1,5 +1,5 @@
> /*
> - * omap-usb3 - USB PHY, talking to dwc3 controller in OMAP.
> + * phy-ti-pipe3 - PIPE3 PHY driver.
> *
> * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
> * This program is free software; you can redistribute it and/or modify
> @@ -19,10 +19,11 @@
> #include <linux/module.h>
> #include <linux/platform_device.h>
> #include <linux/slab.h>
> -#include <linux/usb/omap_usb.h>
> +#include <linux/phy/phy.h>
> #include <linux/of.h>
> #include <linux/clk.h>
> #include <linux/err.h>
> +#include <linux/io.h>
> #include <linux/pm_runtime.h>
> #include <linux/delay.h>
> #include <linux/usb/omap_control_usb.h>
> @@ -52,17 +53,34 @@
>
> /*
> * This is an Empirical value that works, need to confirm the actual
> - * value required for the USB3PHY_PLL_CONFIGURATION2.PLL_IDLE status
> - * to be correctly reflected in the USB3PHY_PLL_STATUS register.
> + * value required for the PIPE3PHY_PLL_CONFIGURATION2.PLL_IDLE status
> + * to be correctly reflected in the PIPE3PHY_PLL_STATUS register.
> */
> # define PLL_IDLE_TIME 100;
>
> -struct usb_dpll_map {
> +struct pipe3_dpll_params {
> + u16 m;
> + u8 n;
> + u8 freq:3;
> + u8 sd;
> + u32 mf;
> +};
> +
> +struct ti_pipe3 {
> + void __iomem *pll_ctrl_base;
> + struct device *dev;
> + struct device *control_dev;
> + struct clk *wkupclk;
> + struct clk *sys_clk;
> + struct clk *optclk;
> +};
> +
> +struct pipe3_dpll_map {
> unsigned long rate;
> - struct usb_dpll_params params;
> + struct pipe3_dpll_params params;
> };
>
> -static struct usb_dpll_map dpll_map[] = {
> +static struct pipe3_dpll_map dpll_map[] = {
> {12000000, {1250, 5, 4, 20, 0} }, /* 12 MHz */
> {16800000, {3125, 20, 4, 20, 0} }, /* 16.8 MHz */
> {19200000, {1172, 8, 4, 20, 65537} }, /* 19.2 MHz */
> @@ -71,7 +89,18 @@ static struct usb_dpll_map dpll_map[] = {
> {38400000, {3125, 47, 4, 20, 92843} }, /* 38.4 MHz */
> };
>
> -static struct usb_dpll_params *omap_usb3_get_dpll_params(unsigned long rate)
> +static inline u32 ti_pipe3_readl(void __iomem *addr, unsigned offset)
> +{
> + return __raw_readl(addr + offset);
> +}
> +
> +static inline void ti_pipe3_writel(void __iomem *addr, unsigned offset,
> + u32 data)
> +{
> + __raw_writel(data, addr + offset);
> +}
> +
> +static struct pipe3_dpll_params *ti_pipe3_get_dpll_params(unsigned long rate)
> {
> int i;
>
> @@ -83,110 +112,123 @@ static struct usb_dpll_params *omap_usb3_get_dpll_params(unsigned long rate)
> return NULL;
> }
>
> -static int omap_usb3_suspend(struct usb_phy *x, int suspend)
> +static int ti_pipe3_power_off(struct phy *x)
> +{
> + struct ti_pipe3 *phy = phy_get_drvdata(x);
> + int val;
> + int timeout = PLL_IDLE_TIME;
> +
> + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
> + val |= PLL_IDLE;
> + ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
> +
> + do {
> + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS);
> + if (val & PLL_TICOPWDN)
> + break;
> + udelay(5);
> + } while (--timeout);
> +
> + if (!timeout) {
> + dev_err(phy->dev, "power off failed\n");
> + return -EBUSY;
> + }
> +
> + omap_control_usb_phy_power(phy->control_dev, 0);
> +
> + return 0;
> +}
> +
> +static int ti_pipe3_power_on(struct phy *x)
> {
> - struct omap_usb *phy = phy_to_omapusb(x);
> - int val;
> + struct ti_pipe3 *phy = phy_get_drvdata(x);
> + int val;
> int timeout = PLL_IDLE_TIME;
>
> - if (suspend && !phy->is_suspended) {
> - val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
> - val |= PLL_IDLE;
> - omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
> -
> - do {
> - val = omap_usb_readl(phy->pll_ctrl_base, PLL_STATUS);
> - if (val & PLL_TICOPWDN)
> - break;
> - udelay(1);
> - } while (--timeout);
> -
> - omap_control_usb_phy_power(phy->control_dev, 0);
> -
> - phy->is_suspended = 1;
> - } else if (!suspend && phy->is_suspended) {
> - phy->is_suspended = 0;
> -
> - val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
> - val &= ~PLL_IDLE;
> - omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
> -
> - do {
> - val = omap_usb_readl(phy->pll_ctrl_base, PLL_STATUS);
> - if (!(val & PLL_TICOPWDN))
> - break;
> - udelay(1);
> - } while (--timeout);
> + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
> + val &= ~PLL_IDLE;
> + ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
> +
> + do {
> + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS);
> + if (!(val & PLL_TICOPWDN))
> + break;
> + udelay(5);
> + } while (--timeout);
> +
> + if (!timeout) {
> + dev_err(phy->dev, "power on failed\n");
> + return -EBUSY;
> }
>
> return 0;
> }
>
> -static void omap_usb_dpll_relock(struct omap_usb *phy)
> +static void ti_pipe3_dpll_relock(struct ti_pipe3 *phy)
> {
> u32 val;
> unsigned long timeout;
>
> - omap_usb_writel(phy->pll_ctrl_base, PLL_GO, SET_PLL_GO);
> + ti_pipe3_writel(phy->pll_ctrl_base, PLL_GO, SET_PLL_GO);
>
> timeout = jiffies + msecs_to_jiffies(20);
> do {
> - val = omap_usb_readl(phy->pll_ctrl_base, PLL_STATUS);
> + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS);
> if (val & PLL_LOCK)
> break;
> } while (!WARN_ON(time_after(jiffies, timeout)));
> }
>
> -static int omap_usb_dpll_lock(struct omap_usb *phy)
> +static int ti_pipe3_dpll_lock(struct ti_pipe3 *phy)
> {
> u32 val;
> unsigned long rate;
> - struct usb_dpll_params *dpll_params;
> + struct pipe3_dpll_params *dpll_params;
>
> rate = clk_get_rate(phy->sys_clk);
> - dpll_params = omap_usb3_get_dpll_params(rate);
> + dpll_params = ti_pipe3_get_dpll_params(rate);
> if (!dpll_params) {
> dev_err(phy->dev,
> "No DPLL configuration for %lu Hz SYS CLK\n", rate);
> return -EINVAL;
> }
>
> - val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1);
> + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1);
> val &= ~PLL_REGN_MASK;
> val |= dpll_params->n << PLL_REGN_SHIFT;
> - omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val);
> + ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val);
>
> - val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
> + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
> val &= ~PLL_SELFREQDCO_MASK;
> val |= dpll_params->freq << PLL_SELFREQDCO_SHIFT;
> - omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
> + ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
>
> - val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1);
> + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1);
> val &= ~PLL_REGM_MASK;
> val |= dpll_params->m << PLL_REGM_SHIFT;
> - omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val);
> + ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val);
>
> - val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION4);
> + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION4);
> val &= ~PLL_REGM_F_MASK;
> val |= dpll_params->mf << PLL_REGM_F_SHIFT;
> - omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION4, val);
> + ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION4, val);
>
> - val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION3);
> + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION3);
> val &= ~PLL_SD_MASK;
> val |= dpll_params->sd << PLL_SD_SHIFT;
> - omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION3, val);
> + ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION3, val);
>
> - omap_usb_dpll_relock(phy);
> + ti_pipe3_dpll_relock(phy);
>
> return 0;
> }
>
> -static int omap_usb3_init(struct usb_phy *x)
> +static int ti_pipe3_init(struct phy *x)
> {
> - struct omap_usb *phy = phy_to_omapusb(x);
> + struct ti_pipe3 *phy = phy_get_drvdata(x);
> int ret;
>
> - ret = omap_usb_dpll_lock(phy);
> + ret = ti_pipe3_dpll_lock(phy);
> if (ret)
> return ret;
>
> @@ -195,9 +237,18 @@ static int omap_usb3_init(struct usb_phy *x)
> return 0;
> }
>
> -static int omap_usb3_probe(struct platform_device *pdev)
> +static struct phy_ops ops = {
> + .init = ti_pipe3_init,
> + .power_on = ti_pipe3_power_on,
> + .power_off = ti_pipe3_power_off,
> + .owner = THIS_MODULE,
> +};
> +
> +static int ti_pipe3_probe(struct platform_device *pdev)
> {
> - struct omap_usb *phy;
> + struct ti_pipe3 *phy;
> + struct phy *generic_phy;
> + struct phy_provider *phy_provider;
> struct resource *res;
> struct device_node *node = pdev->dev.of_node;
> struct device_node *control_node;
> @@ -208,7 +259,7 @@ static int omap_usb3_probe(struct platform_device *pdev)
>
> phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
> if (!phy) {
> - dev_err(&pdev->dev, "unable to alloc mem for OMAP USB3 PHY\n");
> + dev_err(&pdev->dev, "unable to alloc mem for TI PIPE3 PHY\n");
> return -ENOMEM;
> }
>
> @@ -219,13 +270,6 @@ static int omap_usb3_probe(struct platform_device *pdev)
>
> phy->dev = &pdev->dev;
>
> - phy->phy.dev = phy->dev;
> - phy->phy.label = "omap-usb3";
> - phy->phy.init = omap_usb3_init;
> - phy->phy.set_suspend = omap_usb3_suspend;
> - phy->phy.type = USB_PHY_TYPE_USB3;
> -
> - phy->is_suspended = 1;
> phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");
> if (IS_ERR(phy->wkupclk)) {
> dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n");
> @@ -251,6 +295,7 @@ static int omap_usb3_probe(struct platform_device *pdev)
> dev_err(&pdev->dev, "Failed to get control device phandle\n");
> return -EINVAL;
> }
> +
> control_pdev = of_find_device_by_node(control_node);
> if (!control_pdev) {
> dev_err(&pdev->dev, "Failed to get control device\n");
> @@ -260,23 +305,31 @@ static int omap_usb3_probe(struct platform_device *pdev)
> phy->control_dev = &control_pdev->dev;
>
> omap_control_usb_phy_power(phy->control_dev, 0);
> - usb_add_phy_dev(&phy->phy);
>
> platform_set_drvdata(pdev, phy);
> -
> pm_runtime_enable(phy->dev);
> +
> + generic_phy = devm_phy_create(phy->dev, &ops, NULL);
> + if (IS_ERR(generic_phy))
> + return PTR_ERR(generic_phy);
> +
> + phy_set_drvdata(generic_phy, phy);
> + phy_provider = devm_of_phy_provider_register(phy->dev,
> + of_phy_simple_xlate);
> + if (IS_ERR(phy_provider))
> + return PTR_ERR(phy_provider);
> +
> pm_runtime_get(&pdev->dev);
>
> return 0;
> }
>
> -static int omap_usb3_remove(struct platform_device *pdev)
> +static int ti_pipe3_remove(struct platform_device *pdev)
> {
> - struct omap_usb *phy = platform_get_drvdata(pdev);
> + struct ti_pipe3 *phy = platform_get_drvdata(pdev);
>
> clk_unprepare(phy->wkupclk);
> clk_unprepare(phy->optclk);
> - usb_remove_phy(&phy->phy);
> if (!pm_runtime_suspended(&pdev->dev))
> pm_runtime_put(&pdev->dev);
> pm_runtime_disable(&pdev->dev);
> @@ -286,10 +339,9 @@ static int omap_usb3_remove(struct platform_device *pdev)
>
> #ifdef CONFIG_PM_RUNTIME
>
> -static int omap_usb3_runtime_suspend(struct device *dev)
> +static int ti_pipe3_runtime_suspend(struct device *dev)
> {
> - struct platform_device *pdev = to_platform_device(dev);
> - struct omap_usb *phy = platform_get_drvdata(pdev);
> + struct ti_pipe3 *phy = dev_get_drvdata(dev);
>
> clk_disable(phy->wkupclk);
> clk_disable(phy->optclk);
> @@ -297,11 +349,10 @@ static int omap_usb3_runtime_suspend(struct device *dev)
> return 0;
> }
>
> -static int omap_usb3_runtime_resume(struct device *dev)
> +static int ti_pipe3_runtime_resume(struct device *dev)
> {
> u32 ret = 0;
> - struct platform_device *pdev = to_platform_device(dev);
> - struct omap_usb *phy = platform_get_drvdata(pdev);
> + struct ti_pipe3 *phy = dev_get_drvdata(dev);
>
> ret = clk_enable(phy->optclk);
> if (ret) {
> @@ -324,38 +375,39 @@ err1:
> return ret;
> }
>
> -static const struct dev_pm_ops omap_usb3_pm_ops = {
> - SET_RUNTIME_PM_OPS(omap_usb3_runtime_suspend, omap_usb3_runtime_resume,
> - NULL)
> +static const struct dev_pm_ops ti_pipe3_pm_ops = {
> + SET_RUNTIME_PM_OPS(ti_pipe3_runtime_suspend,
> + ti_pipe3_runtime_resume, NULL)
> };
>
> -#define DEV_PM_OPS (&omap_usb3_pm_ops)
> +#define DEV_PM_OPS (&ti_pipe3_pm_ops)
> #else
> #define DEV_PM_OPS NULL
> #endif
>
> #ifdef CONFIG_OF
> -static const struct of_device_id omap_usb3_id_table[] = {
> +static const struct of_device_id ti_pipe3_id_table[] = {
> + { .compatible = "ti,phy-usb3" },
> { .compatible = "ti,omap-usb3" },
> {}
> };
> -MODULE_DEVICE_TABLE(of, omap_usb3_id_table);
> +MODULE_DEVICE_TABLE(of, ti_pipe3_id_table);
> #endif
>
> -static struct platform_driver omap_usb3_driver = {
> - .probe = omap_usb3_probe,
> - .remove = omap_usb3_remove,
> +static struct platform_driver ti_pipe3_driver = {
> + .probe = ti_pipe3_probe,
> + .remove = ti_pipe3_remove,
> .driver = {
> - .name = "omap-usb3",
> + .name = "ti-pipe3",
> .owner = THIS_MODULE,
> .pm = DEV_PM_OPS,
> - .of_match_table = of_match_ptr(omap_usb3_id_table),
> + .of_match_table = of_match_ptr(ti_pipe3_id_table),
> },
> };
>
> -module_platform_driver(omap_usb3_driver);
> +module_platform_driver(ti_pipe3_driver);
>
> -MODULE_ALIAS("platform: omap_usb3");
> +MODULE_ALIAS("platform: ti_pipe3");
> MODULE_AUTHOR("Texas Instruments Inc.");
> -MODULE_DESCRIPTION("OMAP USB3 phy driver");
> +MODULE_DESCRIPTION("TI PIPE3 phy driver");
> MODULE_LICENSE("GPL v2");
> diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
> index 7d1451d..c337ba2 100644
> --- a/drivers/usb/phy/Kconfig
> +++ b/drivers/usb/phy/Kconfig
> @@ -85,17 +85,6 @@ config OMAP_CONTROL_USB
> power on the USB2 PHY is present in OMAP4 and OMAP5. OMAP5 has an
> additional register to power on USB3 PHY.
>
> -config OMAP_USB3
> - tristate "OMAP USB3 PHY Driver"
> - depends on ARCH_OMAP2PLUS || COMPILE_TEST
> - select OMAP_CONTROL_USB
> - select USB_PHY
> - help
> - Enable this to support the USB3 PHY that is part of SOC. This
> - driver takes care of all the PHY functionality apart from comparator.
> - This driver interacts with the "OMAP Control USB Driver" to power
> - on/off the PHY.
> -
> config AM335X_CONTROL_USB
> tristate
>
> diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
> index be58ada..15f1878 100644
> --- a/drivers/usb/phy/Makefile
> +++ b/drivers/usb/phy/Makefile
> @@ -17,7 +17,6 @@ obj-$(CONFIG_OMAP_CONTROL_USB) += phy-omap-control.o
> obj-$(CONFIG_AM335X_CONTROL_USB) += phy-am335x-control.o
> obj-$(CONFIG_AM335X_PHY_USB) += phy-am335x.o
> obj-$(CONFIG_OMAP_OTG) += phy-omap-otg.o
> -obj-$(CONFIG_OMAP_USB3) += phy-omap-usb3.o
> obj-$(CONFIG_SAMSUNG_USBPHY) += phy-samsung-usb.o
> obj-$(CONFIG_SAMSUNG_USB2PHY) += phy-samsung-usb2.o
> obj-$(CONFIG_SAMSUNG_USB3PHY) += phy-samsung-usb3.o
>
--
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