diff options
Diffstat (limited to 'drivers/usb/phy')
| -rw-r--r-- | drivers/usb/phy/Kconfig | 28 | ||||
| -rw-r--r-- | drivers/usb/phy/Makefile | 3 | ||||
| -rw-r--r-- | drivers/usb/phy/omap-control-usb.c | 295 | ||||
| -rw-r--r-- | drivers/usb/phy/omap-usb2.c | 72 | ||||
| -rw-r--r-- | drivers/usb/phy/omap-usb3.c | 355 | ||||
| -rw-r--r-- | drivers/usb/phy/samsung-usbphy.c | 930 |
6 files changed, 1649 insertions, 34 deletions
diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig index 5de6e7f39f9c..65217a590068 100644 --- a/drivers/usb/phy/Kconfig +++ b/drivers/usb/phy/Kconfig @@ -8,12 +8,32 @@ config OMAP_USB2 tristate "OMAP USB2 PHY Driver" depends on ARCH_OMAP2PLUS select USB_OTG_UTILS + select OMAP_CONTROL_USB help Enable this to support the transceiver that is part of SOC. This driver takes care of all the PHY functionality apart from comparator. The USB OTG controller communicates with the comparator using this driver. +config OMAP_USB3 + tristate "OMAP USB3 PHY Driver" + select USB_OTG_UTILS + select OMAP_CONTROL_USB + 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 OMAP_CONTROL_USB + tristate "OMAP CONTROL USB Driver" + help + Enable this to add support for the USB part present in the control + module. This driver has API to power on the USB2 PHY and to write to + the mailbox. The mailbox is present only in omap4 and the register to + power on the USB2 PHY is present in OMAP4 and OMAP5. OMAP5 has an + additional register to power on USB3 PHY. + config USB_ISP1301 tristate "NXP ISP1301 USB transceiver support" depends on USB || USB_GADGET @@ -45,3 +65,11 @@ config USB_RCAR_PHY To compile this driver as a module, choose M here: the module will be called rcar-phy. + +config SAMSUNG_USBPHY + bool "Samsung USB PHY controller Driver" + depends on USB_S3C_HSOTG || USB_EHCI_S5P || USB_OHCI_EXYNOS + select USB_OTG_UTILS + help + Enable this to support Samsung USB phy controller for samsung + SoCs. diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile index 1a579a860a03..b13faa193e0c 100644 --- a/drivers/usb/phy/Makefile +++ b/drivers/usb/phy/Makefile @@ -5,7 +5,10 @@ ccflags-$(CONFIG_USB_DEBUG) := -DDEBUG obj-$(CONFIG_OMAP_USB2) += omap-usb2.o +obj-$(CONFIG_OMAP_USB3) += omap-usb3.o +obj-$(CONFIG_OMAP_CONTROL_USB) += omap-control-usb.o obj-$(CONFIG_USB_ISP1301) += isp1301.o obj-$(CONFIG_MV_U3D_PHY) += mv_u3d_phy.o obj-$(CONFIG_USB_EHCI_TEGRA) += tegra_usb_phy.o obj-$(CONFIG_USB_RCAR_PHY) += rcar-phy.o +obj-$(CONFIG_SAMSUNG_USBPHY) += samsung-usbphy.o diff --git a/drivers/usb/phy/omap-control-usb.c b/drivers/usb/phy/omap-control-usb.c new file mode 100644 index 000000000000..5323b71c3521 --- /dev/null +++ b/drivers/usb/phy/omap-control-usb.c @@ -0,0 +1,295 @@ +/* + * omap-control-usb.c - The USB part of control module. + * + * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Author: Kishon Vijay Abraham I <kishon@ti.com> + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/of.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/usb/omap_control_usb.h> + +static struct omap_control_usb *control_usb; + +/** + * omap_get_control_dev - returns the device pointer for this control device + * + * This API should be called to get the device pointer for this control + * module device. This device pointer should be used for called other + * exported API's in this driver. + * + * To be used by PHY driver and glue driver. + */ +struct device *omap_get_control_dev(void) +{ + if (!control_usb) + return ERR_PTR(-ENODEV); + + return control_usb->dev; +} +EXPORT_SYMBOL_GPL(omap_get_control_dev); + +/** + * omap_control_usb3_phy_power - power on/off the serializer using control + * module + * @dev: the control module device + * @on: 0 to off and 1 to on based on powering on or off the PHY + * + * usb3 PHY driver should call this API to power on or off the PHY. + */ +void omap_control_usb3_phy_power(struct device *dev, bool on) +{ + u32 val; + unsigned long rate; + struct omap_control_usb *control_usb = dev_get_drvdata(dev); + + if (control_usb->type != OMAP_CTRL_DEV_TYPE2) + return; + + rate = clk_get_rate(control_usb->sys_clk); + rate = rate/1000000; + + val = readl(control_usb->phy_power); + + if (on) { + val &= ~(OMAP_CTRL_USB_PWRCTL_CLK_CMD_MASK | + OMAP_CTRL_USB_PWRCTL_CLK_FREQ_MASK); + val |= OMAP_CTRL_USB3_PHY_TX_RX_POWERON << + OMAP_CTRL_USB_PWRCTL_CLK_CMD_SHIFT; + val |= rate << OMAP_CTRL_USB_PWRCTL_CLK_FREQ_SHIFT; + } else { + val &= ~OMAP_CTRL_USB_PWRCTL_CLK_CMD_MASK; + val |= OMAP_CTRL_USB3_PHY_TX_RX_POWEROFF << + OMAP_CTRL_USB_PWRCTL_CLK_CMD_SHIFT; + } + + writel(val, control_usb->phy_power); +} +EXPORT_SYMBOL_GPL(omap_control_usb3_phy_power); + +/** + * omap_control_usb_phy_power - power on/off the phy using control module reg + * @dev: the control module device + * @on: 0 or 1, based on powering on or off the PHY + */ +void omap_control_usb_phy_power(struct device *dev, int on) +{ + u32 val; + struct omap_control_usb *control_usb = dev_get_drvdata(dev); + + val = readl(control_usb->dev_conf); + + if (on) + val &= ~OMAP_CTRL_DEV_PHY_PD; + else + val |= OMAP_CTRL_DEV_PHY_PD; + + writel(val, control_usb->dev_conf); +} +EXPORT_SYMBOL_GPL(omap_control_usb_phy_power); + +/** + * omap_control_usb_host_mode - set AVALID, VBUSVALID and ID pin in grounded + * @ctrl_usb: struct omap_control_usb * + * + * Writes to the mailbox register to notify the usb core that a usb + * device has been connected. + */ +static void omap_control_usb_host_mode(struct omap_control_usb *ctrl_usb) +{ + u32 val; + + val = readl(ctrl_usb->otghs_control); + val &= ~(OMAP_CTRL_DEV_IDDIG | OMAP_CTRL_DEV_SESSEND); + val |= OMAP_CTRL_DEV_AVALID | OMAP_CTRL_DEV_VBUSVALID; + writel(val, ctrl_usb->otghs_control); +} + +/** + * omap_control_usb_device_mode - set AVALID, VBUSVALID and ID pin in high + * impedance + * @ctrl_usb: struct omap_control_usb * + * + * Writes to the mailbox register to notify the usb core that it has been + * connected to a usb host. + */ +static void omap_control_usb_device_mode(struct omap_control_usb *ctrl_usb) +{ + u32 val; + + val = readl(ctrl_usb->otghs_control); + val &= ~OMAP_CTRL_DEV_SESSEND; + val |= OMAP_CTRL_DEV_IDDIG | OMAP_CTRL_DEV_AVALID | + OMAP_CTRL_DEV_VBUSVALID; + writel(val, ctrl_usb->otghs_control); +} + +/** + * omap_control_usb_set_sessionend - Enable SESSIONEND and IDIG to high + * impedance + * @ctrl_usb: struct omap_control_usb * + * + * Writes to the mailbox register to notify the usb core it's now in + * disconnected state. + */ +static void omap_control_usb_set_sessionend(struct omap_control_usb *ctrl_usb) +{ + u32 val; + + val = readl(ctrl_usb->otghs_control); + val &= ~(OMAP_CTRL_DEV_AVALID | OMAP_CTRL_DEV_VBUSVALID); + val |= OMAP_CTRL_DEV_IDDIG | OMAP_CTRL_DEV_SESSEND; + writel(val, ctrl_usb->otghs_control); +} + +/** + * omap_control_usb_set_mode - Calls to functions to set USB in one of host mode + * or device mode or to denote disconnected state + * @dev: the control module device + * @mode: The mode to which usb should be configured + * + * This is an API to write to the mailbox register to notify the usb core that + * a usb device has been connected. + */ +void omap_control_usb_set_mode(struct device *dev, + enum omap_control_usb_mode mode) +{ + struct omap_control_usb *ctrl_usb; + + if (IS_ERR(dev) || control_usb->type != OMAP_CTRL_DEV_TYPE1) + return; + + ctrl_usb = dev_get_drvdata(dev); + + switch (mode) { + case USB_MODE_HOST: + omap_control_usb_host_mode(ctrl_usb); + break; + case USB_MODE_DEVICE: + omap_control_usb_device_mode(ctrl_usb); + break; + case USB_MODE_DISCONNECT: + omap_control_usb_set_sessionend(ctrl_usb); + break; + default: + dev_vdbg(dev, "invalid omap control usb mode\n"); + } +} +EXPORT_SYMBOL_GPL(omap_control_usb_set_mode); + +static int omap_control_usb_probe(struct platform_device *pdev) +{ + struct resource *res; + struct device_node *np = pdev->dev.of_node; + struct omap_control_usb_platform_data *pdata = pdev->dev.platform_data; + + control_usb = devm_kzalloc(&pdev->dev, sizeof(*control_usb), + GFP_KERNEL); + if (!control_usb) { + dev_err(&pdev->dev, "unable to alloc memory for control usb\n"); + return -ENOMEM; + } + + if (np) { + of_property_read_u32(np, "ti,type", &control_usb->type); + } else if (pdata) { + control_usb->type = pdata->type; + } else { + dev_err(&pdev->dev, "no pdata present\n"); + return -EINVAL; + } + + control_usb->dev = &pdev->dev; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "control_dev_conf"); + control_usb->dev_conf = devm_request_and_ioremap(&pdev->dev, res); + if (!control_usb->dev_conf) { + dev_err(&pdev->dev, "Failed to obtain io memory\n"); + return -EADDRNOTAVAIL; + } + + if (control_usb->type == OMAP_CTRL_DEV_TYPE1) { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "otghs_control"); + control_usb->otghs_control = devm_request_and_ioremap( + &pdev->dev, res); + if (!control_usb->otghs_control) { + dev_err(&pdev->dev, "Failed to obtain io memory\n"); + return -EADDRNOTAVAIL; + } + } + + if (control_usb->type == OMAP_CTRL_DEV_TYPE2) { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "phy_power_usb"); + control_usb->phy_power = devm_request_and_ioremap( + &pdev->dev, res); + if (!control_usb->phy_power) { + dev_dbg(&pdev->dev, "Failed to obtain io memory\n"); + return -EADDRNOTAVAIL; + } + + control_usb->sys_clk = devm_clk_get(control_usb->dev, + "sys_clkin"); + if (IS_ERR(control_usb->sys_clk)) { + pr_err("%s: unable to get sys_clkin\n", __func__); + return -EINVAL; + } + } + + + dev_set_drvdata(control_usb->dev, control_usb); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id omap_control_usb_id_table[] = { + { .compatible = "ti,omap-control-usb" }, + {} +}; +MODULE_DEVICE_TABLE(of, omap_control_usb_id_table); +#endif + +static struct platform_driver omap_control_usb_driver = { + .probe = omap_control_usb_probe, + .driver = { + .name = "omap-control-usb", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(omap_control_usb_id_table), + }, +}; + +static int __init omap_control_usb_init(void) +{ + return platform_driver_register(&omap_control_usb_driver); +} +subsys_initcall(omap_control_usb_init); + +static void __exit omap_control_usb_exit(void) +{ + platform_driver_unregister(&omap_control_usb_driver); +} +module_exit(omap_control_usb_exit); + +MODULE_ALIAS("platform: omap_control_usb"); +MODULE_AUTHOR("Texas Instruments Inc."); +MODULE_DESCRIPTION("OMAP Control Module USB Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/usb/phy/omap-usb2.c b/drivers/usb/phy/omap-usb2.c index 2fdb8ede5f1c..844ab68f08d0 100644 --- a/drivers/usb/phy/omap-usb2.c +++ b/drivers/usb/phy/omap-usb2.c @@ -27,6 +27,7 @@ #include <linux/err.h> #include <linux/pm_runtime.h> #include <linux/delay.h> +#include <linux/usb/omap_control_usb.h> /** * omap_usb2_set_comparator - links the comparator present in the sytem with @@ -52,29 +53,6 @@ int omap_usb2_set_comparator(struct phy_companion *comparator) } EXPORT_SYMBOL_GPL(omap_usb2_set_comparator); -/** - * omap_usb_phy_power - power on/off the phy using control module reg - * @phy: struct omap_usb * - * @on: 0 or 1, based on powering on or off the PHY - * - * XXX: Remove this function once control module driver gets merged - */ -static void omap_usb_phy_power(struct omap_usb *phy, int on) -{ - u32 val; - - if (on) { - val = readl(phy->control_dev); - if (val & PHY_PD) { - writel(~PHY_PD, phy->control_dev); - /* XXX: add proper documentation for this delay */ - mdelay(200); - } - } else { - writel(PHY_PD, phy->control_dev); - } -} - static int omap_usb_set_vbus(struct usb_otg *otg, bool enabled) { struct omap_usb *phy = phy_to_omapusb(otg->phy); @@ -124,7 +102,7 @@ static int omap_usb2_suspend(struct usb_phy *x, int suspend) struct omap_usb *phy = phy_to_omapusb(x); if (suspend && !phy->is_suspended) { - omap_usb_phy_power(phy, 0); + omap_control_usb_phy_power(phy->control_dev, 0); pm_runtime_put_sync(phy->dev); phy->is_suspended = 1; } else if (!suspend && phy->is_suspended) { @@ -134,7 +112,7 @@ static int omap_usb2_suspend(struct usb_phy *x, int suspend) ret); return ret; } - omap_usb_phy_power(phy, 1); + omap_control_usb_phy_power(phy->control_dev, 1); phy->is_suspended = 0; } @@ -145,7 +123,6 @@ static int omap_usb2_probe(struct platform_device *pdev) { struct omap_usb *phy; struct usb_otg *otg; - struct resource *res; phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL); if (!phy) { @@ -165,15 +142,16 @@ static int omap_usb2_probe(struct platform_device *pdev) phy->phy.label = "omap-usb2"; phy->phy.set_suspend = omap_usb2_suspend; phy->phy.otg = otg; + phy->phy.type = USB_PHY_TYPE_USB2; - res = platform_get_resource(pdev, IORESOURCE_MEM, 1); - - phy->control_dev = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(phy->control_dev)) - return PTR_ERR(phy->control_dev); + phy->control_dev = omap_get_control_dev(); + if (IS_ERR(phy->control_dev)) { + dev_dbg(&pdev->dev, "Failed to get control device\n"); + return -ENODEV; + } phy->is_suspended = 1; - omap_usb_phy_power(phy, 0); + omap_control_usb_phy_power(phy->control_dev, 0); otg->set_host = omap_usb_set_host; otg->set_peripheral = omap_usb_set_peripheral; @@ -188,7 +166,13 @@ static int omap_usb2_probe(struct platform_device *pdev) } clk_prepare(phy->wkupclk); - usb_add_phy(&phy->phy, USB_PHY_TYPE_USB2); + phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m"); + if (IS_ERR(phy->optclk)) + dev_vdbg(&pdev->dev, "unable to get refclk960m\n"); + else + clk_prepare(phy->optclk); + + usb_add_phy_dev(&phy->phy); platform_set_drvdata(pdev, phy); @@ -202,6 +186,8 @@ static int omap_usb2_remove(struct platform_device *pdev) struct omap_usb *phy = platform_get_drvdata(pdev); clk_unprepare(phy->wkupclk); + if (!IS_ERR(phy->optclk)) + clk_unprepare(phy->optclk); usb_remove_phy(&phy->phy); return 0; @@ -215,6 +201,8 @@ static int omap_usb2_runtime_suspend(struct device *dev) struct omap_usb *phy = platform_get_drvdata(pdev); clk_disable(phy->wkupclk); + if (!IS_ERR(phy->optclk)) + clk_disable(phy->optclk); return 0; } @@ -226,9 +214,25 @@ static int omap_usb2_runtime_resume(struct device *dev) struct omap_usb *phy = platform_get_drvdata(pdev); ret = clk_enable(phy->wkupclk); - if (ret < 0) + if (ret < 0) { dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret); + goto err0; + } + + if (!IS_ERR(phy->optclk)) { + ret = clk_enable(phy->optclk); + if (ret < 0) { + dev_err(phy->dev, "Failed to enable optclk %d\n", ret); + goto err1; + } + } + + return 0; + +err1: + clk_disable(phy->wkupclk); +err0: return ret; } diff --git a/drivers/usb/phy/omap-usb3.c b/drivers/usb/phy/omap-usb3.c new file mode 100644 index 000000000000..fadc0c2b65bb --- /dev/null +++ b/drivers/usb/phy/omap-usb3.c @@ -0,0 +1,355 @@ +/* + * omap-usb3 - USB PHY, talking to dwc3 controller in OMAP. + * + * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Author: Kishon Vijay Abraham I <kishon@ti.com> + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/usb/omap_usb.h> +#include <linux/of.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/pm_runtime.h> +#include <linux/delay.h> +#include <linux/usb/omap_control_usb.h> + +#define NUM_SYS_CLKS 5 +#define PLL_STATUS 0x00000004 +#define PLL_GO 0x00000008 +#define PLL_CONFIGURATION1 0x0000000C +#define PLL_CONFIGURATION2 0x00000010 +#define PLL_CONFIGURATION3 0x00000014 +#define PLL_CONFIGURATION4 0x00000020 + +#define PLL_REGM_MASK 0x001FFE00 +#define PLL_REGM_SHIFT 0x9 +#define PLL_REGM_F_MASK 0x0003FFFF +#define PLL_REGM_F_SHIFT 0x0 +#define PLL_REGN_MASK 0x000001FE +#define PLL_REGN_SHIFT 0x1 +#define PLL_SELFREQDCO_MASK 0x0000000E +#define PLL_SELFREQDCO_SHIFT 0x1 +#define PLL_SD_MASK 0x0003FC00 +#define PLL_SD_SHIFT 0x9 +#define SET_PLL_GO 0x1 +#define PLL_TICOPWDN 0x10000 +#define PLL_LOCK 0x2 +#define PLL_IDLE 0x1 + +/* + * 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. + */ +# define PLL_IDLE_TIME 100; + +enum sys_clk_rate { + CLK_RATE_UNDEFINED = -1, + CLK_RATE_12MHZ, + CLK_RATE_16MHZ, + CLK_RATE_19MHZ, + CLK_RATE_26MHZ, + CLK_RATE_38MHZ +}; + +static struct usb_dpll_params omap_usb3_dpll_params[NUM_SYS_CLKS] = { + {1250, 5, 4, 20, 0}, /* 12 MHz */ + {3125, 20, 4, 20, 0}, /* 16.8 MHz */ + {1172, 8, 4, 20, 65537}, /* 19.2 MHz */ + {1250, 12, 4, 20, 0}, /* 26 MHz */ + {3125, 47, 4, 20, 92843}, /* 38.4 MHz */ +}; + +static int omap_usb3_suspend(struct usb_phy *x, int suspend) +{ + struct omap_usb *phy = phy_to_omapusb(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_usb3_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); + } + + return 0; +} + +static inline enum sys_clk_rate __get_sys_clk_index(unsigned long rate) +{ + switch (rate) { + case 12000000: + return CLK_RATE_12MHZ; + case 16800000: + return CLK_RATE_16MHZ; + case 19200000: + return CLK_RATE_19MHZ; + case 26000000: + return CLK_RATE_26MHZ; + case 38400000: + return CLK_RATE_38MHZ; + default: + return CLK_RATE_UNDEFINED; + } +} + +static void omap_usb_dpll_relock(struct omap_usb *phy) +{ + u32 val; + unsigned long timeout; + + omap_usb_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); + if (val & PLL_LOCK) + break; + } while (!WARN_ON(time_after(jiffies, timeout))); +} + +static int omap_usb_dpll_lock(struct omap_usb *phy) +{ + u32 val; + unsigned long rate; + enum sys_clk_rate clk_index; + + rate = clk_get_rate(phy->sys_clk); + clk_index = __get_sys_clk_index(rate); + + if (clk_index == CLK_RATE_UNDEFINED) { + pr_err("dpll cannot be locked for sys clk freq:%luHz\n", rate); + return -EINVAL; + } + + val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1); + val &= ~PLL_REGN_MASK; + val |= omap_usb3_dpll_params[clk_index].n << PLL_REGN_SHIFT; + omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val); + + val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2); + val &= ~PLL_SELFREQDCO_MASK; + val |= omap_usb3_dpll_params[clk_index].freq << PLL_SELFREQDCO_SHIFT; + omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val); + + val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1); + val &= ~PLL_REGM_MASK; + val |= omap_usb3_dpll_params[clk_index].m << PLL_REGM_SHIFT; + omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val); + + val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION4); + val &= ~PLL_REGM_F_MASK; + val |= omap_usb3_dpll_params[clk_index].mf << PLL_REGM_F_SHIFT; + omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION4, val); + + val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION3); + val &= ~PLL_SD_MASK; + val |= omap_usb3_dpll_params[clk_index].sd << PLL_SD_SHIFT; + omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION3, val); + + omap_usb_dpll_relock(phy); + + return 0; +} + +static int omap_usb3_init(struct usb_phy *x) +{ + struct omap_usb *phy = phy_to_omapusb(x); + + omap_usb_dpll_lock(phy); + omap_control_usb3_phy_power(phy->control_dev, 1); + + return 0; +} + +static int omap_usb3_probe(struct platform_device *pdev) +{ + struct omap_usb *phy; + struct resource *res; + + phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL); + if (!phy) { + dev_err(&pdev->dev, "unable to alloc mem for OMAP USB3 PHY\n"); + return -ENOMEM; + } + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pll_ctrl"); + phy->pll_ctrl_base = devm_request_and_ioremap(&pdev->dev, res); + if (!phy->pll_ctrl_base) { + dev_err(&pdev->dev, "ioremap of pll_ctrl failed\n"); + return -ENOMEM; + } + + 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"); + return PTR_ERR(phy->wkupclk); + } + clk_prepare(phy->wkupclk); + + phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m"); + if (IS_ERR(phy->optclk)) { + dev_err(&pdev->dev, "unable to get usb_otg_ss_refclk960m\n"); + return PTR_ERR(phy->optclk); + } + clk_prepare(phy->optclk); + + phy->sys_clk = devm_clk_get(phy->dev, "sys_clkin"); + if (IS_ERR(phy->sys_clk)) { + pr_err("%s: unable to get sys_clkin\n", __func__); + return -EINVAL; + } + + phy->control_dev = omap_get_control_dev(); + if (IS_ERR(phy->control_dev)) { + dev_dbg(&pdev->dev, "Failed to get control device\n"); + return -ENODEV; + } + + omap_control_usb3_phy_power(phy->control_dev, 0); + usb_add_phy_dev(&phy->phy); + + platform_set_drvdata(pdev, phy); + + pm_runtime_enable(phy->dev); + pm_runtime_get(&pdev->dev); + + return 0; +} + +static int omap_usb3_remove(struct platform_device *pdev) +{ + struct omap_usb *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); + + return 0; +} + +#ifdef CONFIG_PM_RUNTIME + +static int omap_usb3_runtime_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct omap_usb *phy = platform_get_drvdata(pdev); + + clk_disable(phy->wkupclk); + clk_disable(phy->optclk); + + return 0; +} + +static int omap_usb3_runtime_resume(struct device *dev) +{ + u32 ret = 0; + struct platform_device *pdev = to_platform_device(dev); + struct omap_usb *phy = platform_get_drvdata(pdev); + + ret = clk_enable(phy->optclk); + if (ret) { + dev_err(phy->dev, "Failed to enable optclk %d\n", ret); + goto err1; + } + + ret = clk_enable(phy->wkupclk); + if (ret) { + dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret); + goto err2; + } + + return 0; + +err2: + clk_disable(phy->optclk); + +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) +}; + +#define DEV_PM_OPS (&omap_usb3_pm_ops) +#else +#define DEV_PM_OPS NULL +#endif + +#ifdef CONFIG_OF +static const struct of_device_id omap_usb3_id_table[] = { + { .compatible = "ti,omap-usb3" }, + {} +}; +MODULE_DEVICE_TABLE(of, omap_usb3_id_table); +#endif + +static struct platform_driver omap_usb3_driver = { + .probe = omap_usb3_probe, + .remove = omap_usb3_remove, + .driver = { + .name = "omap-usb3", + .owner = THIS_MODULE, + .pm = DEV_PM_OPS, + .of_match_table = of_match_ptr(omap_usb3_id_table), + }, +}; + +module_platform_driver(omap_usb3_driver); + +MODULE_ALIAS("platform: omap_usb3"); +MODULE_AUTHOR("Texas Instruments Inc."); +MODULE_DESCRIPTION("OMAP USB3 phy driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/usb/phy/samsung-usbphy.c b/drivers/usb/phy/samsung-usbphy.c new file mode 100644 index 000000000000..6ea553733832 --- /dev/null +++ b/drivers/usb/phy/samsung-usbphy.c @@ -0,0 +1,930 @@ +/* linux/drivers/usb/phy/samsung-usbphy.c + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * Author: Praveen Paneri <p.paneri@samsung.com> + * + * Samsung USB2.0 PHY transceiver; talks to S3C HS OTG controller, EHCI-S5P and + * OHCI-EXYNOS controllers. + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/usb/otg.h> +#include <linux/usb/samsung_usb_phy.h> +#include <linux/platform_data/samsung-usbphy.h> + +/* Register definitions */ + +#define SAMSUNG_PHYPWR (0x00) + +#define PHYPWR_NORMAL_MASK (0x19 << 0) +#define PHYPWR_OTG_DISABLE (0x1 << 4) +#define PHYPWR_ANALOG_POWERDOWN (0x1 << 3) +#define PHYPWR_FORCE_SUSPEND (0x1 << 1) +/* For Exynos4 */ +#define PHYPWR_NORMAL_MASK_PHY0 (0x39 << 0) +#define PHYPWR_SLEEP_PHY0 (0x1 << 5) + +#define SAMSUNG_PHYCLK (0x04) + +#define PHYCLK_MODE_USB11 (0x1 << 6) +#define PHYCLK_EXT_OSC (0x1 << 5) +#define PHYCLK_COMMON_ON_N (0x1 << 4) +#define PHYCLK_ID_PULL (0x1 << 2) +#define PHYCLK_CLKSEL_MASK (0x3 << 0) +#define PHYCLK_CLKSEL_48M (0x0 << 0) +#define PHYCLK_CLKSEL_12M (0x2 << 0) +#define PHYCLK_CLKSEL_24M (0x3 << 0) + +#define SAMSUNG_RSTCON (0x08) + +#define RSTCON_PHYLINK_SWRST (0x1 << 2) +#define RSTCON_HLINK_SWRST (0x1 << 1) +#define RSTCON_SWRST (0x1 << 0) + +/* EXYNOS5 */ +#define EXYNOS5_PHY_HOST_CTRL0 (0x00) + +#define HOST_CTRL0_PHYSWRSTALL (0x1 << 31) + +#define HOST_CTRL0_REFCLKSEL_MASK (0x3 << 19) +#define HOST_CTRL0_REFCLKSEL_XTAL (0x0 << 19) +#define HOST_CTRL0_REFCLKSEL_EXTL (0x1 << 19) +#define HOST_CTRL0_REFCLKSEL_CLKCORE (0x2 << 19) + +#define HOST_CTRL0_FSEL_MASK (0x7 << 16) +#define HOST_CTRL0_FSEL(_x) ((_x) << 16) + +#define FSEL_CLKSEL_50M (0x7) +#define FSEL_CLKSEL_24M (0x5) +#define FSEL_CLKSEL_20M (0x4) +#define FSEL_CLKSEL_19200K (0x3) +#define FSEL_CLKSEL_12M (0x2) +#define FSEL_CLKSEL_10M (0x1) +#define FSEL_CLKSEL_9600K (0x0) + +#define HOST_CTRL0_TESTBURNIN (0x1 << 11) +#define HOST_CTRL0_RETENABLE (0x1 << 10) +#define HOST_CTRL0_COMMONON_N (0x1 << 9) +#define HOST_CTRL0_SIDDQ (0x1 << 6) +#define HOST_CTRL0_FORCESLEEP (0x1 << 5) +#define HOST_CTRL0_FORCESUSPEND (0x1 << 4) +#define HOST_CTRL0_WORDINTERFACE (0x1 << 3) +#define HOST_CTRL0_UTMISWRST (0x1 << 2) +#define HOST_CTRL0_LINKSWRST (0x1 << 1) +#define HOST_CTRL0_PHYSWRST (0x1 << 0) + +#define EXYNOS5_PHY_HOST_TUNE0 (0x04) + +#define EXYNOS5_PHY_HSIC_CTRL1 (0x10) + +#define EXYNOS5_PHY_HSIC_TUNE1 (0x14) + +#define EXYNOS5_PHY_HSIC_CTRL2 (0x20) + +#define EXYNOS5_PHY_HSIC_TUNE2 (0x24) + +#define HSIC_CTRL_REFCLKSEL_MASK (0x3 << 23) +#define HSIC_CTRL_REFCLKSEL (0x2 << 23) + +#define HSIC_CTRL_REFCLKDIV_MASK (0x7f << 16) +#define HSIC_CTRL_REFCLKDIV(_x) ((_x) << 16) +#define HSIC_CTRL_REFCLKDIV_12 (0x24 << 16) +#define HSIC_CTRL_REFCLKDIV_15 (0x1c << 16) +#define HSIC_CTRL_REFCLKDIV_16 (0x1a << 16) +#define HSIC_CTRL_REFCLKDIV_19_2 (0x15 << 16) +#define HSIC_CTRL_REFCLKDIV_20 (0x14 << 16) + +#define HSIC_CTRL_SIDDQ (0x1 << 6) +#define HSIC_CTRL_FORCESLEEP (0x1 << 5) +#define HSIC_CTRL_FORCESUSPEND (0x1 << 4) +#define HSIC_CTRL_WORDINTERFACE (0x1 << 3) +#define HSIC_CTRL_UTMISWRST (0x1 << 2) +#define HSIC_CTRL_PHYSWRST (0x1 << 0) + +#define EXYNOS5_PHY_HOST_EHCICTRL (0x30) + +#define HOST_EHCICTRL_ENAINCRXALIGN (0x1 << 29) +#define HOST_EHCICTRL_ENAINCR4 (0x1 << 28) +#define HOST_EHCICTRL_ENAINCR8 (0x1 << 27) +#define HOST_EHCICTRL_ENAINCR16 (0x1 << 26) + +#define EXYNOS5_PHY_HOST_OHCICTRL (0x34) + +#define HOST_OHCICTRL_SUSPLGCY (0x1 << 3) +#define HOST_OHCICTRL_APPSTARTCLK (0x1 << 2) +#define HOST_OHCICTRL_CNTSEL (0x1 << 1) +#define HOST_OHCICTRL_CLKCKTRST (0x1 << 0) + +#define EXYNOS5_PHY_OTG_SYS (0x38) + +#define OTG_SYS_PHYLINK_SWRESET (0x1 << 14) +#define OTG_SYS_LINKSWRST_UOTG (0x1 << 13) +#define OTG_SYS_PHY0_SWRST (0x1 << 12) + +#define OTG_SYS_REFCLKSEL_MASK (0x3 << 9) +#define OTG_SYS_REFCLKSEL_XTAL (0x0 << 9) +#define OTG_SYS_REFCLKSEL_EXTL (0x1 << 9) +#define OTG_SYS_REFCLKSEL_CLKCORE (0x2 << 9) + +#define OTG_SYS_IDPULLUP_UOTG (0x1 << 8) +#define OTG_SYS_COMMON_ON (0x1 << 7) + +#define OTG_SYS_FSEL_MASK (0x7 << 4) +#define OTG_SYS_FSEL(_x) ((_x) << 4) + +#define OTG_SYS_FORCESLEEP (0x1 << 3) +#define OTG_SYS_OTGDISABLE (0x1 << 2) +#define OTG_SYS_SIDDQ_UOTG (0x1 << 1) +#define OTG_SYS_FORCESUSPEND (0x1 << 0) + +#define EXYNOS5_PHY_OTG_TUNE (0x40) + +#ifndef MHZ +#define MHZ (1000*1000) +#endif + +#ifndef KHZ +#define KHZ (1000) +#endif + +#define EXYNOS_USBHOST_PHY_CTRL_OFFSET (0x4) +#define S3C64XX_USBPHY_ENABLE (0x1 << 16) +#define EXYNOS_USBPHY_ENABLE (0x1 << 0) +#define EXYNOS_USB20PHY_CFG_HOST_LINK (0x1 << 0) + +enum samsung_cpu_type { + TYPE_S3C64XX, + TYPE_EXYNOS4210, + TYPE_EXYNOS5250, +}; + +/* + * struct samsung_usbphy_drvdata - driver data for various SoC variants + * @cpu_type: machine identifier + * @devphy_en_mask: device phy enable mask for PHY CONTROL register + * @hostphy_en_mask: host phy enable mask for PHY CONTROL register + * @devphy_reg_offset: offset to DEVICE PHY CONTROL register from + * mapped address of system controller. + * @hostphy_reg_offset: offset to HOST PHY CONTROL register from + * mapped address of system controller. + * + * Here we have a separate mask for device type phy. + * Having different masks for host and device type phy helps + * in setting independent masks in case of SoCs like S5PV210, + * in which PHY0 and PHY1 enable bits belong to same register + * placed at position 0 and 1 respectively. + * Although for newer SoCs like exynos these bits belong to + * different registers altogether placed at position 0. + */ +struct samsung_usbphy_drvdata { + int cpu_type; + int devphy_en_mask; + int hostphy_en_mask; + u32 devphy_reg_offset; + u32 hostphy_reg_offset; +}; + +/* + * struct samsung_usbphy - transceiver driver state + * @phy: transceiver structure + * @plat: platform data + * @dev: The parent device supplied to the probe function + * @clk: usb phy clock + * @regs: usb phy controller registers memory base + * @pmuregs: USB device PHY_CONTROL register memory base + * @sysreg: USB2.0 PHY_CFG register memory base + * @ref_clk_freq: reference clock frequency selection + * @drv_data: driver data available for different SoCs + * @phy_type: Samsung SoCs specific phy types: #HOST + * #DEVICE + * @phy_usage: usage count for phy + * @lock: lock for phy operations + */ +struct samsung_usbphy { + struct usb_phy phy; + struct samsung_usbphy_data *plat; + struct device *dev; + struct clk *clk; + void __iomem *regs; + void __iomem *pmuregs; + void __iomem *sysreg; + int ref_clk_freq; + const struct samsung_usbphy_drvdata *drv_data; + enum samsung_usb_phy_type phy_type; + atomic_t phy_usage; + spinlock_t lock; +}; + +#define phy_to_sphy(x) container_of((x), struct samsung_usbphy, phy) + +int samsung_usbphy_set_host(struct usb_otg *otg, struct usb_bus *host) +{ + if (!otg) + return -ENODEV; + + if (!otg->host) + otg->host = host; + + return 0; +} + +static int samsung_usbphy_parse_dt(struct samsung_usbphy *sphy) +{ + struct device_node *usbphy_sys; + + /* Getting node for system controller interface for usb-phy */ + usbphy_sys = of_get_child_by_name(sphy->dev->of_node, "usbphy-sys"); + if (!usbphy_sys) { + dev_err(sphy->dev, "No sys-controller interface for usb-phy\n"); + return -ENODEV; + } + + sphy->pmuregs = of_iomap(usbphy_sys, 0); + + if (sphy->pmuregs == NULL) { + dev_err(sphy->dev, "Can't get usb-phy pmu control register\n"); + goto err0; + } + + sphy->sysreg = of_iomap(usbphy_sys, 1); + + /* + * Not returning error code here, since this situation is not fatal. + * Few SoCs may not have this switch available + */ + if (sphy->sysreg == NULL) + dev_warn(sphy->dev, "Can't get usb-phy sysreg cfg register\n"); + + of_node_put(usbphy_sys); + + return 0; + +err0: + of_node_put(usbphy_sys); + return -ENXIO; +} + +/* + * Set isolation here for phy. + * Here 'on = true' would mean USB PHY block is isolated, hence + * de-activated and vice-versa. + */ +static void samsung_usbphy_set_isolation(struct samsung_usbphy *sphy, bool on) +{ + void __iomem *reg = NULL; + u32 reg_val; + u32 en_mask = 0; + + if (!sphy->pmuregs) { + dev_warn(sphy->dev, "Can't set pmu isolation\n"); + return; + } + + switch (sphy->drv_data->cpu_type) { + case TYPE_S3C64XX: + /* + * Do nothing: We will add here once S3C64xx goes for DT support + */ + break; + case TYPE_EXYNOS4210: + /* + * Fall through since exynos4210 and exynos5250 have similar + * register architecture: two separate registers for host and + * device phy control with enable bit at position 0. + */ + case TYPE_EXYNOS5250: + if (sphy->phy_type == USB_PHY_TYPE_DEVICE) { + reg = sphy->pmuregs + + sphy->drv_data->devphy_reg_offset; + en_mask = sphy->drv_data->devphy_en_mask; + } else if (sphy->phy_type == USB_PHY_TYPE_HOST) { + reg = sphy->pmuregs + + sphy->drv_data->hostphy_reg_offset; + en_mask = sphy->drv_data->hostphy_en_mask; + } + break; + default: + dev_err(sphy->dev, "Invalid SoC type\n"); + return; + } + + reg_val = readl(reg); + + if (on) + reg_val &= ~en_mask; + else + reg_val |= en_mask; + + writel(reg_val, reg); +} + +/* + * Configure the mode of working of usb-phy here: HOST/DEVICE. + */ +static void samsung_usbphy_cfg_sel(struct samsung_usbphy *sphy) +{ + u32 reg; + + if (!sphy->sysreg) { + dev_warn(sphy->dev, "Can't configure specified phy mode\n"); + return; + } + + reg = readl(sphy->sysreg); + + if (sphy->phy_type == USB_PHY_TYPE_DEVICE) + reg &= ~EXYNOS_USB20PHY_CFG_HOST_LINK; + else if (sphy->phy_type == USB_PHY_TYPE_HOST) + reg |= EXYNOS_USB20PHY_CFG_HOST_LINK; + + writel(reg, sphy->sysreg); +} + +/* + * PHYs are different for USB Device and USB Host. + * This make sure that correct PHY type is selected before + * any operation on PHY. + */ +static int samsung_usbphy_set_type(struct usb_phy *phy, + enum samsung_usb_phy_type phy_type) +{ + struct samsung_usbphy *sphy = phy_to_sphy(phy); + + sphy->phy_type = phy_type; + + return 0; +} + +/* + * Returns reference clock frequency selection value + */ +static int samsung_usbphy_get_refclk_freq(struct samsung_usbphy *sphy) +{ + struct clk *ref_clk; + int refclk_freq = 0; + + /* + * In exynos5250 USB host and device PHY use + * external crystal clock XXTI + */ + if (sphy->drv_data->cpu_type == TYPE_EXYNOS5250) + ref_clk = clk_get(sphy->dev, "ext_xtal"); + else + ref_clk = clk_get(sphy->dev, "xusbxti"); + if (IS_ERR(ref_clk)) { + dev_err(sphy->dev, "Failed to get reference clock\n"); + return PTR_ERR(ref_clk); + } + + if (sphy->drv_data->cpu_type == TYPE_EXYNOS5250) { + /* set clock frequency for PLL */ + switch (clk_get_rate(ref_clk)) { + case 9600 * KHZ: + refclk_freq = FSEL_CLKSEL_9600K; + break; + case 10 * MHZ: + refclk_freq = FSEL_CLKSEL_10M; + break; + case 12 * MHZ: + refclk_freq = FSEL_CLKSEL_12M; + break; + case 19200 * KHZ: + refclk_freq = FSEL_CLKSEL_19200K; + break; + case 20 * MHZ: + refclk_freq = FSEL_CLKSEL_20M; + break; + case 50 * MHZ: + refclk_freq = FSEL_CLKSEL_50M; + break; + case 24 * MHZ: + default: + /* default reference clock */ + refclk_freq = FSEL_CLKSEL_24M; + break; + } + } else { + switch (clk_get_rate(ref_clk)) { + case 12 * MHZ: + refclk_freq = PHYCLK_CLKSEL_12M; + break; + case 24 * MHZ: + refclk_freq = PHYCLK_CLKSEL_24M; + break; + case 48 * MHZ: + refclk_freq = PHYCLK_CLKSEL_48M; + break; + default: + if (sphy->drv_data->cpu_type == TYPE_S3C64XX) + refclk_freq = PHYCLK_CLKSEL_48M; + else + refclk_freq = PHYCLK_CLKSEL_24M; + break; + } + } + clk_put(ref_clk); + + return refclk_freq; +} + +static bool exynos5_phyhost_is_on(void *regs) +{ + u32 reg; + + reg = readl(regs + EXYNOS5_PHY_HOST_CTRL0); + + return !(reg & HOST_CTRL0_SIDDQ); +} + +static void samsung_exynos5_usbphy_enable(struct samsung_usbphy *sphy) +{ + void __iomem *regs = sphy->regs; + u32 phyclk = sphy->ref_clk_freq; + u32 phyhost; + u32 phyotg; + u32 phyhsic; + u32 ehcictrl; + u32 ohcictrl; + + /* + * phy_usage helps in keeping usage count for phy + * so that the first consumer enabling the phy is also + * the last consumer to disable it. + */ + + atomic_inc(&sphy->phy_usage); + + if (exynos5_phyhost_is_on(regs)) { + dev_info(sphy->dev, "Already power on PHY\n"); + return; + } + + /* Host configuration */ + phyhost = readl(regs + EXYNOS5_PHY_HOST_CTRL0); + + /* phy reference clock configuration */ + phyhost &= ~HOST_CTRL0_FSEL_MASK; + phyhost |= HOST_CTRL0_FSEL(phyclk); + + /* host phy reset */ + phyhost &= ~(HOST_CTRL0_PHYSWRST | + HOST_CTRL0_PHYSWRSTALL | + HOST_CTRL0_SIDDQ | + /* Enable normal mode of operation */ + HOST_CTRL0_FORCESUSPEND | + HOST_CTRL0_FORCESLEEP); + + /* Link reset */ + phyhost |= (HOST_CTRL0_LINKSWRST | + HOST_CTRL0_UTMISWRST | + /* COMMON Block configuration during suspend */ + HOST_CTRL0_COMMONON_N); + writel(phyhost, regs + EXYNOS5_PHY_HOST_CTRL0); + udelay(10); + phyhost &= ~(HOST_CTRL0_LINKSWRST | + HOST_CTRL0_UTMISWRST); + writel(phyhost, regs + EXYNOS5_PHY_HOST_CTRL0); + + /* OTG configuration */ + phyotg = readl(regs + EXYNOS5_PHY_OTG_SYS); + + /* phy reference clock configuration */ + phyotg &= ~OTG_SYS_FSEL_MASK; + phyotg |= OTG_SYS_FSEL(phyclk); + + /* Enable normal mode of operation */ + phyotg &= ~(OTG_SYS_FORCESUSPEND | + OTG_SYS_SIDDQ_UOTG | + OTG_SYS_FORCESLEEP | + OTG_SYS_REFCLKSEL_MASK | + /* COMMON Block configuration during suspend */ + OTG_SYS_COMMON_ON); + + /* OTG phy & link reset */ + phyotg |= (OTG_SYS_PHY0_SWRST | + OTG_SYS_LINKSWRST_UOTG | + OTG_SYS_PHYLINK_SWRESET | + OTG_SYS_OTGDISABLE | + /* Set phy refclk */ + OTG_SYS_REFCLKSEL_CLKCORE); + + writel(phyotg, regs + EXYNOS5_PHY_OTG_SYS); + udelay(10); + phyotg &= ~(OTG_SYS_PHY0_SWRST | + OTG_SYS_LINKSWRST_UOTG | + OTG_SYS_PHYLINK_SWRESET); + writel(phyotg, regs + EXYNOS5_PHY_OTG_SYS); + + /* HSIC phy configuration */ + phyhsic = (HSIC_CTRL_REFCLKDIV_12 | + HSIC_CTRL_REFCLKSEL | + HSIC_CTRL_PHYSWRST); + writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL1); + writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL2); + udelay(10); + phyhsic &= ~HSIC_CTRL_PHYSWRST; + writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL1); + writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL2); + + udelay(80); + + /* enable EHCI DMA burst */ + ehcictrl = readl(regs + EXYNOS5_PHY_HOST_EHCICTRL); + ehcictrl |= (HOST_EHCICTRL_ENAINCRXALIGN | + HOST_EHCICTRL_ENAINCR4 | + HOST_EHCICTRL_ENAINCR8 | + HOST_EHCICTRL_ENAINCR16); + writel(ehcictrl, regs + EXYNOS5_PHY_HOST_EHCICTRL); + + /* set ohci_suspend_on_n */ + ohcictrl = readl(regs + EXYNOS5_PHY_HOST_OHCICTRL); + ohcictrl |= HOST_OHCICTRL_SUSPLGCY; + writel(ohcictrl, regs + EXYNOS5_PHY_HOST_OHCICTRL); +} + +static void samsung_usbphy_enable(struct samsung_usbphy *sphy) +{ + void __iomem *regs = sphy->regs; + u32 phypwr; + u32 phyclk; + u32 rstcon; + + /* set clock frequency for PLL */ + phyclk = sphy->ref_clk_freq; + phypwr = readl(regs + SAMSUNG_PHYPWR); + rstcon = readl(regs + SAMSUNG_RSTCON); + + switch (sphy->drv_data->cpu_type) { + case TYPE_S3C64XX: + phyclk &= ~PHYCLK_COMMON_ON_N; + phypwr &= ~PHYPWR_NORMAL_MASK; + rstcon |= RSTCON_SWRST; + break; + case TYPE_EXYNOS4210: + phypwr &= ~PHYPWR_NORMAL_MASK_PHY0; + rstcon |= RSTCON_SWRST; + default: + break; + } + + writel(phyclk, regs + SAMSUNG_PHYCLK); + /* Configure PHY0 for normal operation*/ + writel(phypwr, regs + SAMSUNG_PHYPWR); + /* reset all ports of PHY and Link */ + writel(rstcon, regs + SAMSUNG_RSTCON); + udelay(10); + rstcon &= ~RSTCON_SWRST; + writel(rstcon, regs + SAMSUNG_RSTCON); +} + +static void samsung_exynos5_usbphy_disable(struct samsung_usbphy *sphy) +{ + void __iomem *regs = sphy->regs; + u32 phyhost; + u32 phyotg; + u32 phyhsic; + + if (atomic_dec_return(&sphy->phy_usage) > 0) { + dev_info(sphy->dev, "still being used\n"); + return; + } + + phyhsic = (HSIC_CTRL_REFCLKDIV_12 | + HSIC_CTRL_REFCLKSEL | + HSIC_CTRL_SIDDQ | + HSIC_CTRL_FORCESLEEP | + HSIC_CTRL_FORCESUSPEND); + writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL1); + writel(phyhsic, regs + EXYNOS5_PHY_HSIC_CTRL2); + + phyhost = readl(regs + EXYNOS5_PHY_HOST_CTRL0); + phyhost |= (HOST_CTRL0_SIDDQ | + HOST_CTRL0_FORCESUSPEND | + HOST_CTRL0_FORCESLEEP | + HOST_CTRL0_PHYSWRST | + HOST_CTRL0_PHYSWRSTALL); + writel(phyhost, regs + EXYNOS5_PHY_HOST_CTRL0); + + phyotg = readl(regs + EXYNOS5_PHY_OTG_SYS); + phyotg |= (OTG_SYS_FORCESUSPEND | + OTG_SYS_SIDDQ_UOTG | + OTG_SYS_FORCESLEEP); + writel(phyotg, regs + EXYNOS5_PHY_OTG_SYS); +} + +static void samsung_usbphy_disable(struct samsung_usbphy *sphy) +{ + void __iomem *regs = sphy->regs; + u32 phypwr; + + phypwr = readl(regs + SAMSUNG_PHYPWR); + + switch (sphy->drv_data->cpu_type) { + case TYPE_S3C64XX: + phypwr |= PHYPWR_NORMAL_MASK; + break; + case TYPE_EXYNOS4210: + phypwr |= PHYPWR_NORMAL_MASK_PHY0; + default: + break; + } + + /* Disable analog and otg block power */ + writel(phypwr, regs + SAMSUNG_PHYPWR); +} + +/* + * The function passed to the usb driver for phy initialization + */ +static int samsung_usbphy_init(struct usb_phy *phy) +{ + struct samsung_usbphy *sphy; + struct usb_bus *host = NULL; + unsigned long flags; + int ret = 0; + + sphy = phy_to_sphy(phy); + + host = phy->otg->host; + + /* Enable the phy clock */ + ret = clk_prepare_enable(sphy->clk); + if (ret) { + dev_err(sphy->dev, "%s: clk_prepare_enable failed\n", __func__); + return ret; + } + + spin_lock_irqsave(&sphy->lock, flags); + + if (host) { + /* setting default phy-type for USB 2.0 */ + if (!strstr(dev_name(host->controller), "ehci") || + !strstr(dev_name(host->controller), "ohci")) + samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_HOST); + } else { + samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_DEVICE); + } + + /* Disable phy isolation */ + if (sphy->plat && sphy->plat->pmu_isolation) + sphy->plat->pmu_isolation(false); + else + samsung_usbphy_set_isolation(sphy, false); + + /* Selecting Host/OTG mode; After reset USB2.0PHY_CFG: HOST */ + samsung_usbphy_cfg_sel(sphy); + + /* Initialize usb phy registers */ + if (sphy->drv_data->cpu_type == TYPE_EXYNOS5250) + samsung_exynos5_usbphy_enable(sphy); + else + samsung_usbphy_enable(sphy); + + spin_unlock_irqrestore(&sphy->lock, flags); + + /* Disable the phy clock */ + clk_disable_unprepare(sphy->clk); + + return ret; +} + +/* + * The function passed to the usb driver for phy shutdown + */ +static void samsung_usbphy_shutdown(struct usb_phy *phy) +{ + struct samsung_usbphy *sphy; + struct usb_bus *host = NULL; + unsigned long flags; + + sphy = phy_to_sphy(phy); + + host = phy->otg->host; + + if (clk_prepare_enable(sphy->clk)) { + dev_err(sphy->dev, "%s: clk_prepare_enable failed\n", __func__); + return; + } + + spin_lock_irqsave(&sphy->lock, flags); + + if (host) { + /* setting default phy-type for USB 2.0 */ + if (!strstr(dev_name(host->controller), "ehci") || + !strstr(dev_name(host->controller), "ohci")) + samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_HOST); + } else { + samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_DEVICE); + } + + /* De-initialize usb phy registers */ + if (sphy->drv_data->cpu_type == TYPE_EXYNOS5250) + samsung_exynos5_usbphy_disable(sphy); + else + samsung_usbphy_disable(sphy); + + /* Enable phy isolation */ + if (sphy->plat && sphy->plat->pmu_isolation) + sphy->plat->pmu_isolation(true); + else + samsung_usbphy_set_isolation(sphy, true); + + spin_unlock_irqrestore(&sphy->lock, flags); + + clk_disable_unprepare(sphy->clk); +} + +static const struct of_device_id samsung_usbphy_dt_match[]; + +static inline const struct samsung_usbphy_drvdata +*samsung_usbphy_get_driver_data(struct platform_device *pdev) +{ + if (pdev->dev.of_node) { + const struct of_device_id *match; + match = of_match_node(samsung_usbphy_dt_match, + pdev->dev.of_node); + return match->data; + } + + return (struct samsung_usbphy_drvdata *) + platform_get_device_id(pdev)->driver_data; +} + +static int samsung_usbphy_probe(struct platform_device *pdev) +{ + struct samsung_usbphy *sphy; + struct usb_otg *otg; + struct samsung_usbphy_data *pdata = pdev->dev.platform_data; + const struct samsung_usbphy_drvdata *drv_data; + struct device *dev = &pdev->dev; + struct resource *phy_mem; + void __iomem *phy_base; + struct clk *clk; + int ret; + + phy_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!phy_mem) { + dev_err(dev, "%s: missing mem resource\n", __func__); + return -ENODEV; + } + + phy_base = devm_request_and_ioremap(dev, phy_mem); + if (!phy_base) { + dev_err(dev, "%s: register mapping failed\n", __func__); + return -ENXIO; + } + + sphy = devm_kzalloc(dev, sizeof(*sphy), GFP_KERNEL); + if (!sphy) + return -ENOMEM; + + otg = devm_kzalloc(dev, sizeof(*otg), GFP_KERNEL); + if (!otg) + return -ENOMEM; + + drv_data = samsung_usbphy_get_driver_data(pdev); + + if (drv_data->cpu_type == TYPE_EXYNOS5250) + clk = devm_clk_get(dev, "usbhost"); + else + clk = devm_clk_get(dev, "otg"); + + if (IS_ERR(clk)) { + dev_err(dev, "Failed to get otg clock\n"); + return PTR_ERR(clk); + } + + sphy->dev = dev; + + if (dev->of_node) { + ret = samsung_usbphy_parse_dt(sphy); + if (ret < 0) + return ret; + } else { + if (!pdata) { + dev_err(dev, "no platform data specified\n"); + return -EINVAL; + } + } + + sphy->plat = pdata; + sphy->regs = phy_base; + sphy->clk = clk; + sphy->drv_data = drv_data; + sphy->phy.dev = sphy->dev; + sphy->phy.label = "samsung-usbphy"; + sphy->phy.init = samsung_usbphy_init; + sphy->phy.shutdown = samsung_usbphy_shutdown; + sphy->ref_clk_freq = samsung_usbphy_get_refclk_freq(sphy); + + sphy->phy.otg = otg; + sphy->phy.otg->phy = &sphy->phy; + sphy->phy.otg->set_host = samsung_usbphy_set_host; + + spin_lock_init(&sphy->lock); + + platform_set_drvdata(pdev, sphy); + + return usb_add_phy(&sphy->phy, USB_PHY_TYPE_USB2); +} + +static int samsung_usbphy_remove(struct platform_device *pdev) +{ + struct samsung_usbphy *sphy = platform_get_drvdata(pdev); + + usb_remove_phy(&sphy->phy); + + if (sphy->pmuregs) + iounmap(sphy->pmuregs); + if (sphy->sysreg) + iounmap(sphy->sysreg); + + return 0; +} + +static const struct samsung_usbphy_drvdata usbphy_s3c64xx = { + .cpu_type = TYPE_S3C64XX, + .devphy_en_mask = S3C64XX_USBPHY_ENABLE, +}; + +static const struct samsung_usbphy_drvdata usbphy_exynos4 = { + .cpu_type = TYPE_EXYNOS4210, + .devphy_en_mask = EXYNOS_USBPHY_ENABLE, + .hostphy_en_mask = EXYNOS_USBPHY_ENABLE, +}; + +static struct samsung_usbphy_drvdata usbphy_exynos5 = { + .cpu_type = TYPE_EXYNOS5250, + .hostphy_en_mask = EXYNOS_USBPHY_ENABLE, + .hostphy_reg_offset = EXYNOS_USBHOST_PHY_CTRL_OFFSET, +}; + +#ifdef CONFIG_OF +static const struct of_device_id samsung_usbphy_dt_match[] = { + { + .compatible = "samsung,s3c64xx-usbphy", + .data = &usbphy_s3c64xx, + }, { + .compatible = "samsung,exynos4210-usbphy", + .data = &usbphy_exynos4, + }, { + .compatible = "samsung,exynos5250-usbphy", + .data = &usbphy_exynos5 + }, + {}, +}; +MODULE_DEVICE_TABLE(of, samsung_usbphy_dt_match); +#endif + +static struct platform_device_id samsung_usbphy_driver_ids[] = { + { + .name = "s3c64xx-usbphy", + .driver_data = (unsigned long)&usbphy_s3c64xx, + }, { + .name = "exynos4210-usbphy", + .driver_data = (unsigned long)&usbphy_exynos4, + }, { + .name = "exynos5250-usbphy", + .driver_data = (unsigned long)&usbphy_exynos5, + }, + {}, +}; + +MODULE_DEVICE_TABLE(platform, samsung_usbphy_driver_ids); + +static struct platform_driver samsung_usbphy_driver = { + .probe = samsung_usbphy_probe, + .remove = samsung_usbphy_remove, + .id_table = samsung_usbphy_driver_ids, + .driver = { + .name = "samsung-usbphy", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(samsung_usbphy_dt_match), + }, +}; + +module_platform_driver(samsung_usbphy_driver); + +MODULE_DESCRIPTION("Samsung USB phy controller"); +MODULE_AUTHOR("Praveen Paneri <p.paneri@samsung.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:samsung-usbphy"); |
