diff options
author | Vivek Gautam <vivek.gautam@codeaurora.org> | 2017-05-11 08:47:42 +0200 |
---|---|---|
committer | Kishon Vijay Abraham I <kishon@ti.com> | 2017-06-01 11:58:33 +0200 |
commit | 0b56e9a7e8358e59b21d8a425e463072bfae523c (patch) | |
tree | a1bd94fb04cd66967e7d2a0f620a37c87da61cf9 /drivers/phy/ti | |
parent | phy: Move ULPI phy header out of drivers to include path (diff) | |
download | linux-0b56e9a7e8358e59b21d8a425e463072bfae523c.tar.xz linux-0b56e9a7e8358e59b21d8a425e463072bfae523c.zip |
phy: Group vendor specific phy drivers
Adding vendor specific directories in phy to group
phy drivers under their respective vendor umbrella.
Also updated the MAINTAINERS file to reflect the correct
directory structure for phy drivers.
Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Cc: Stephen Boyd <stephen.boyd@linaro.org>
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-arm-msm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-omap@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org
Cc: linux-rockchip@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-usb@vger.kernel.org
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Diffstat (limited to 'drivers/phy/ti')
-rw-r--r-- | drivers/phy/ti/Kconfig | 78 | ||||
-rw-r--r-- | drivers/phy/ti/Makefile | 7 | ||||
-rw-r--r-- | drivers/phy/ti/phy-da8xx-usb.c | 251 | ||||
-rw-r--r-- | drivers/phy/ti/phy-dm816x-usb.c | 290 | ||||
-rw-r--r-- | drivers/phy/ti/phy-omap-control.c | 360 | ||||
-rw-r--r-- | drivers/phy/ti/phy-omap-usb2.c | 439 | ||||
-rw-r--r-- | drivers/phy/ti/phy-ti-pipe3.c | 697 | ||||
-rw-r--r-- | drivers/phy/ti/phy-tusb1210.c | 146 | ||||
-rw-r--r-- | drivers/phy/ti/phy-twl4030-usb.c | 839 |
9 files changed, 3107 insertions, 0 deletions
diff --git a/drivers/phy/ti/Kconfig b/drivers/phy/ti/Kconfig new file mode 100644 index 000000000000..20503562666c --- /dev/null +++ b/drivers/phy/ti/Kconfig @@ -0,0 +1,78 @@ +# +# Phy drivers for TI platforms +# +config PHY_DA8XX_USB + tristate "TI DA8xx USB PHY Driver" + depends on ARCH_DAVINCI_DA8XX + select GENERIC_PHY + select MFD_SYSCON + help + Enable this to support the USB PHY on DA8xx SoCs. + + This driver controls both the USB 1.1 PHY and the USB 2.0 PHY. + +config PHY_DM816X_USB + tristate "TI dm816x USB PHY driver" + depends on ARCH_OMAP2PLUS + depends on USB_SUPPORT + select GENERIC_PHY + select USB_PHY + help + Enable this for dm816x USB to work. + +config OMAP_CONTROL_PHY + tristate "OMAP CONTROL PHY Driver" + depends on ARCH_OMAP2PLUS || COMPILE_TEST + help + Enable this to add support for the PHY 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/SATA PHY/PCIE PHY + (PIPE3 PHY). + +config OMAP_USB2 + tristate "OMAP USB2 PHY Driver" + depends on ARCH_OMAP2PLUS + depends on USB_SUPPORT + select GENERIC_PHY + select USB_PHY + select OMAP_CONTROL_PHY + depends on OMAP_OCP2SCP + 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 TI_PIPE3 + tristate "TI PIPE3 PHY Driver" + depends on ARCH_OMAP2PLUS || COMPILE_TEST + select GENERIC_PHY + select OMAP_CONTROL_PHY + depends on OMAP_OCP2SCP + 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 PHY_TUSB1210 + tristate "TI TUSB1210 ULPI PHY module" + depends on USB_ULPI_BUS + select GENERIC_PHY + help + Support for TI TUSB1210 USB ULPI PHY. + +config TWL4030_USB + tristate "TWL4030 USB Transceiver Driver" + depends on TWL4030_CORE && REGULATOR_TWL4030 && USB_MUSB_OMAP2PLUS + depends on USB_SUPPORT + depends on USB_GADGET || !USB_GADGET # if USB_GADGET=m, this can't 'y' + select GENERIC_PHY + select USB_PHY + help + Enable this to support the USB OTG transceiver on TWL4030 + family chips (including the TWL5030 and TPS659x0 devices). + This transceiver supports high and full speed devices plus, + in host mode, low speed. diff --git a/drivers/phy/ti/Makefile b/drivers/phy/ti/Makefile new file mode 100644 index 000000000000..0cc3a1a557a3 --- /dev/null +++ b/drivers/phy/ti/Makefile @@ -0,0 +1,7 @@ +obj-$(CONFIG_PHY_DA8XX_USB) += phy-da8xx-usb.o +obj-$(CONFIG_PHY_DM816X_USB) += phy-dm816x-usb.o +obj-$(CONFIG_OMAP_CONTROL_PHY) += phy-omap-control.o +obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o +obj-$(CONFIG_TI_PIPE3) += phy-ti-pipe3.o +obj-$(CONFIG_PHY_TUSB1210) += phy-tusb1210.o +obj-$(CONFIG_TWL4030_USB) += phy-twl4030-usb.o diff --git a/drivers/phy/ti/phy-da8xx-usb.c b/drivers/phy/ti/phy-da8xx-usb.c new file mode 100644 index 000000000000..1b82bff6330f --- /dev/null +++ b/drivers/phy/ti/phy-da8xx-usb.c @@ -0,0 +1,251 @@ +/* + * phy-da8xx-usb - TI DaVinci DA8xx USB PHY driver + * + * Copyright (C) 2016 David Lechner <david@lechnology.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; version 2 of the License. + * + * 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/clk.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/mfd/da8xx-cfgchip.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/phy/phy.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#define PHY_INIT_BITS (CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN) + +struct da8xx_usb_phy { + struct phy_provider *phy_provider; + struct phy *usb11_phy; + struct phy *usb20_phy; + struct clk *usb11_clk; + struct clk *usb20_clk; + struct regmap *regmap; +}; + +static int da8xx_usb11_phy_power_on(struct phy *phy) +{ + struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); + int ret; + + ret = clk_prepare_enable(d_phy->usb11_clk); + if (ret) + return ret; + + regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, + CFGCHIP2_USB1SUSPENDM); + + return 0; +} + +static int da8xx_usb11_phy_power_off(struct phy *phy) +{ + struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); + + regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, 0); + + clk_disable_unprepare(d_phy->usb11_clk); + + return 0; +} + +static const struct phy_ops da8xx_usb11_phy_ops = { + .power_on = da8xx_usb11_phy_power_on, + .power_off = da8xx_usb11_phy_power_off, + .owner = THIS_MODULE, +}; + +static int da8xx_usb20_phy_power_on(struct phy *phy) +{ + struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); + int ret; + + ret = clk_prepare_enable(d_phy->usb20_clk); + if (ret) + return ret; + + regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, 0); + + return 0; +} + +static int da8xx_usb20_phy_power_off(struct phy *phy) +{ + struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); + + regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, + CFGCHIP2_OTGPWRDN); + + clk_disable_unprepare(d_phy->usb20_clk); + + return 0; +} + +static int da8xx_usb20_phy_set_mode(struct phy *phy, enum phy_mode mode) +{ + struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); + u32 val; + + switch (mode) { + case PHY_MODE_USB_HOST: /* Force VBUS valid, ID = 0 */ + val = CFGCHIP2_OTGMODE_FORCE_HOST; + break; + case PHY_MODE_USB_DEVICE: /* Force VBUS valid, ID = 1 */ + val = CFGCHIP2_OTGMODE_FORCE_DEVICE; + break; + case PHY_MODE_USB_OTG: /* Don't override the VBUS/ID comparators */ + val = CFGCHIP2_OTGMODE_NO_OVERRIDE; + break; + default: + return -EINVAL; + } + + regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGMODE_MASK, + val); + + return 0; +} + +static const struct phy_ops da8xx_usb20_phy_ops = { + .power_on = da8xx_usb20_phy_power_on, + .power_off = da8xx_usb20_phy_power_off, + .set_mode = da8xx_usb20_phy_set_mode, + .owner = THIS_MODULE, +}; + +static struct phy *da8xx_usb_phy_of_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct da8xx_usb_phy *d_phy = dev_get_drvdata(dev); + + if (!d_phy) + return ERR_PTR(-ENODEV); + + switch (args->args[0]) { + case 0: + return d_phy->usb20_phy; + case 1: + return d_phy->usb11_phy; + default: + return ERR_PTR(-EINVAL); + } +} + +static int da8xx_usb_phy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *node = dev->of_node; + struct da8xx_usb_phy *d_phy; + + d_phy = devm_kzalloc(dev, sizeof(*d_phy), GFP_KERNEL); + if (!d_phy) + return -ENOMEM; + + if (node) + d_phy->regmap = syscon_regmap_lookup_by_compatible( + "ti,da830-cfgchip"); + else + d_phy->regmap = syscon_regmap_lookup_by_pdevname("syscon"); + if (IS_ERR(d_phy->regmap)) { + dev_err(dev, "Failed to get syscon\n"); + return PTR_ERR(d_phy->regmap); + } + + d_phy->usb11_clk = devm_clk_get(dev, "usb11_phy"); + if (IS_ERR(d_phy->usb11_clk)) { + dev_err(dev, "Failed to get usb11_phy clock\n"); + return PTR_ERR(d_phy->usb11_clk); + } + + d_phy->usb20_clk = devm_clk_get(dev, "usb20_phy"); + if (IS_ERR(d_phy->usb20_clk)) { + dev_err(dev, "Failed to get usb20_phy clock\n"); + return PTR_ERR(d_phy->usb20_clk); + } + + d_phy->usb11_phy = devm_phy_create(dev, node, &da8xx_usb11_phy_ops); + if (IS_ERR(d_phy->usb11_phy)) { + dev_err(dev, "Failed to create usb11 phy\n"); + return PTR_ERR(d_phy->usb11_phy); + } + + d_phy->usb20_phy = devm_phy_create(dev, node, &da8xx_usb20_phy_ops); + if (IS_ERR(d_phy->usb20_phy)) { + dev_err(dev, "Failed to create usb20 phy\n"); + return PTR_ERR(d_phy->usb20_phy); + } + + platform_set_drvdata(pdev, d_phy); + phy_set_drvdata(d_phy->usb11_phy, d_phy); + phy_set_drvdata(d_phy->usb20_phy, d_phy); + + if (node) { + d_phy->phy_provider = devm_of_phy_provider_register(dev, + da8xx_usb_phy_of_xlate); + if (IS_ERR(d_phy->phy_provider)) { + dev_err(dev, "Failed to create phy provider\n"); + return PTR_ERR(d_phy->phy_provider); + } + } else { + int ret; + + ret = phy_create_lookup(d_phy->usb11_phy, "usb-phy", + "ohci-da8xx"); + if (ret) + dev_warn(dev, "Failed to create usb11 phy lookup\n"); + ret = phy_create_lookup(d_phy->usb20_phy, "usb-phy", + "musb-da8xx"); + if (ret) + dev_warn(dev, "Failed to create usb20 phy lookup\n"); + } + + regmap_write_bits(d_phy->regmap, CFGCHIP(2), + PHY_INIT_BITS, PHY_INIT_BITS); + + return 0; +} + +static int da8xx_usb_phy_remove(struct platform_device *pdev) +{ + struct da8xx_usb_phy *d_phy = platform_get_drvdata(pdev); + + if (!pdev->dev.of_node) { + phy_remove_lookup(d_phy->usb20_phy, "usb-phy", "musb-da8xx"); + phy_remove_lookup(d_phy->usb11_phy, "usb-phy", "ohci-da8xx"); + } + + return 0; +} + +static const struct of_device_id da8xx_usb_phy_ids[] = { + { .compatible = "ti,da830-usb-phy" }, + { } +}; +MODULE_DEVICE_TABLE(of, da8xx_usb_phy_ids); + +static struct platform_driver da8xx_usb_phy_driver = { + .probe = da8xx_usb_phy_probe, + .remove = da8xx_usb_phy_remove, + .driver = { + .name = "da8xx-usb-phy", + .of_match_table = da8xx_usb_phy_ids, + }, +}; + +module_platform_driver(da8xx_usb_phy_driver); + +MODULE_ALIAS("platform:da8xx-usb-phy"); +MODULE_AUTHOR("David Lechner <david@lechnology.com>"); +MODULE_DESCRIPTION("TI DA8xx USB PHY driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/phy/ti/phy-dm816x-usb.c b/drivers/phy/ti/phy-dm816x-usb.c new file mode 100644 index 000000000000..cbcce7cf0028 --- /dev/null +++ b/drivers/phy/ti/phy-dm816x-usb.c @@ -0,0 +1,290 @@ +/* + * 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 version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; 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/regmap.h> + +#include <linux/slab.h> +#include <linux/of.h> +#include <linux/io.h> +#include <linux/usb/phy_companion.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/pm_runtime.h> +#include <linux/delay.h> +#include <linux/phy/phy.h> +#include <linux/of_platform.h> + +#include <linux/mfd/syscon.h> + +/* + * TRM has two sets of USB_CTRL registers.. The correct register bits + * are in TRM section 24.9.8.2 USB_CTRL Register. The TRM documents the + * phy as being SR70LX Synopsys USB 2.0 OTG nanoPHY. It also seems at + * least dm816x rev c ignores writes to USB_CTRL register, but the TI + * kernel is writing to those so it's possible that later revisions + * have worknig USB_CTRL register. + * + * Also note that At least USB_CTRL register seems to be dm816x specific + * according to the TRM. It's possible that USBPHY_CTRL is more generic, + * but that would have to be checked against the SR70LX documentation + * which does not seem to be publicly available. + * + * Finally, the phy on dm814x and am335x is different from dm816x. + */ +#define DM816X_USB_CTRL_PHYCLKSRC BIT(8) /* 1 = PLL ref clock */ +#define DM816X_USB_CTRL_PHYSLEEP1 BIT(1) /* Enable the first phy */ +#define DM816X_USB_CTRL_PHYSLEEP0 BIT(0) /* Enable the second phy */ + +#define DM816X_USBPHY_CTRL_TXRISETUNE 1 +#define DM816X_USBPHY_CTRL_TXVREFTUNE 0xc +#define DM816X_USBPHY_CTRL_TXPREEMTUNE 0x2 + +struct dm816x_usb_phy { + struct regmap *syscon; + struct device *dev; + unsigned int instance; + struct clk *refclk; + struct usb_phy phy; + unsigned int usb_ctrl; /* Shared between phy0 and phy1 */ + unsigned int usbphy_ctrl; +}; + +static int dm816x_usb_phy_set_host(struct usb_otg *otg, struct usb_bus *host) +{ + otg->host = host; + if (!host) + otg->state = OTG_STATE_UNDEFINED; + + return 0; +} + +static int dm816x_usb_phy_set_peripheral(struct usb_otg *otg, + struct usb_gadget *gadget) +{ + otg->gadget = gadget; + if (!gadget) + otg->state = OTG_STATE_UNDEFINED; + + return 0; +} + +static int dm816x_usb_phy_init(struct phy *x) +{ + struct dm816x_usb_phy *phy = phy_get_drvdata(x); + unsigned int val; + int error; + + if (clk_get_rate(phy->refclk) != 24000000) + dev_warn(phy->dev, "nonstandard phy refclk\n"); + + /* Set PLL ref clock and put phys to sleep */ + error = regmap_update_bits(phy->syscon, phy->usb_ctrl, + DM816X_USB_CTRL_PHYCLKSRC | + DM816X_USB_CTRL_PHYSLEEP1 | + DM816X_USB_CTRL_PHYSLEEP0, + 0); + regmap_read(phy->syscon, phy->usb_ctrl, &val); + if ((val & 3) != 0) + dev_info(phy->dev, + "Working dm816x USB_CTRL! (0x%08x)\n", + val); + + /* + * TI kernel sets these values for "symmetrical eye diagram and + * better signal quality" so let's assume somebody checked the + * values with a scope and set them here too. + */ + regmap_read(phy->syscon, phy->usbphy_ctrl, &val); + val |= DM816X_USBPHY_CTRL_TXRISETUNE | + DM816X_USBPHY_CTRL_TXVREFTUNE | + DM816X_USBPHY_CTRL_TXPREEMTUNE; + regmap_write(phy->syscon, phy->usbphy_ctrl, val); + + return 0; +} + +static const struct phy_ops ops = { + .init = dm816x_usb_phy_init, + .owner = THIS_MODULE, +}; + +static int __maybe_unused dm816x_usb_phy_runtime_suspend(struct device *dev) +{ + struct dm816x_usb_phy *phy = dev_get_drvdata(dev); + unsigned int mask, val; + int error = 0; + + mask = BIT(phy->instance); + val = ~BIT(phy->instance); + error = regmap_update_bits(phy->syscon, phy->usb_ctrl, + mask, val); + if (error) + dev_err(phy->dev, "phy%i failed to power off\n", + phy->instance); + clk_disable(phy->refclk); + + return 0; +} + +static int __maybe_unused dm816x_usb_phy_runtime_resume(struct device *dev) +{ + struct dm816x_usb_phy *phy = dev_get_drvdata(dev); + unsigned int mask, val; + int error; + + error = clk_enable(phy->refclk); + if (error) + return error; + + /* + * Note that at least dm816x rev c does not seem to do + * anything with the USB_CTRL register. But let's follow + * what the TI tree is doing in case later revisions use + * USB_CTRL. + */ + mask = BIT(phy->instance); + val = BIT(phy->instance); + error = regmap_update_bits(phy->syscon, phy->usb_ctrl, + mask, val); + if (error) { + dev_err(phy->dev, "phy%i failed to power on\n", + phy->instance); + clk_disable(phy->refclk); + return error; + } + + return 0; +} + +static UNIVERSAL_DEV_PM_OPS(dm816x_usb_phy_pm_ops, + dm816x_usb_phy_runtime_suspend, + dm816x_usb_phy_runtime_resume, + NULL); + +#ifdef CONFIG_OF +static const struct of_device_id dm816x_usb_phy_id_table[] = { + { + .compatible = "ti,dm8168-usb-phy", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, dm816x_usb_phy_id_table); +#endif + +static int dm816x_usb_phy_probe(struct platform_device *pdev) +{ + struct dm816x_usb_phy *phy; + struct resource *res; + struct phy *generic_phy; + struct phy_provider *phy_provider; + struct usb_otg *otg; + const struct of_device_id *of_id; + const struct usb_phy_data *phy_data; + int error; + + of_id = of_match_device(of_match_ptr(dm816x_usb_phy_id_table), + &pdev->dev); + if (!of_id) + return -EINVAL; + + phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL); + if (!phy) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENOENT; + + phy->syscon = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, + "syscon"); + if (IS_ERR(phy->syscon)) + return PTR_ERR(phy->syscon); + + /* + * According to sprs614e.pdf, the first usb_ctrl is shared and + * the second instance for usb_ctrl is reserved.. Also the + * register bits are different from earlier TRMs. + */ + phy->usb_ctrl = 0x20; + phy->usbphy_ctrl = (res->start & 0xff) + 4; + if (phy->usbphy_ctrl == 0x2c) + phy->instance = 1; + + phy_data = of_id->data; + + otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL); + if (!otg) + return -ENOMEM; + + phy->dev = &pdev->dev; + phy->phy.dev = phy->dev; + phy->phy.label = "dm8168_usb_phy"; + phy->phy.otg = otg; + phy->phy.type = USB_PHY_TYPE_USB2; + otg->set_host = dm816x_usb_phy_set_host; + otg->set_peripheral = dm816x_usb_phy_set_peripheral; + otg->usb_phy = &phy->phy; + + platform_set_drvdata(pdev, phy); + + phy->refclk = devm_clk_get(phy->dev, "refclk"); + if (IS_ERR(phy->refclk)) + return PTR_ERR(phy->refclk); + error = clk_prepare(phy->refclk); + if (error) + return error; + + pm_runtime_enable(phy->dev); + generic_phy = devm_phy_create(phy->dev, NULL, &ops); + 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); + + usb_add_phy_dev(&phy->phy); + + return 0; +} + +static int dm816x_usb_phy_remove(struct platform_device *pdev) +{ + struct dm816x_usb_phy *phy = platform_get_drvdata(pdev); + + usb_remove_phy(&phy->phy); + pm_runtime_disable(phy->dev); + clk_unprepare(phy->refclk); + + return 0; +} + +static struct platform_driver dm816x_usb_phy_driver = { + .probe = dm816x_usb_phy_probe, + .remove = dm816x_usb_phy_remove, + .driver = { + .name = "dm816x-usb-phy", + .pm = &dm816x_usb_phy_pm_ops, + .of_match_table = of_match_ptr(dm816x_usb_phy_id_table), + }, +}; + +module_platform_driver(dm816x_usb_phy_driver); + +MODULE_ALIAS("platform:dm816x_usb"); +MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>"); +MODULE_DESCRIPTION("dm816x usb phy driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/phy/ti/phy-omap-control.c b/drivers/phy/ti/phy-omap-control.c new file mode 100644 index 000000000000..e9c41b3fa0ee --- /dev/null +++ b/drivers/phy/ti/phy-omap-control.c @@ -0,0 +1,360 @@ +/* + * omap-control-phy.c - The PHY 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/of_device.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/phy/omap_control_phy.h> + +/** + * omap_control_pcie_pcs - set the PCS delay count + * @dev: the control module device + * @delay: 8 bit delay value + */ +void omap_control_pcie_pcs(struct device *dev, u8 delay) +{ + u32 val; + struct omap_control_phy *control_phy; + + if (IS_ERR(dev) || !dev) { + pr_err("%s: invalid device\n", __func__); + return; + } + + control_phy = dev_get_drvdata(dev); + if (!control_phy) { + dev_err(dev, "%s: invalid control phy device\n", __func__); + return; + } + + if (control_phy->type != OMAP_CTRL_TYPE_PCIE) { + dev_err(dev, "%s: unsupported operation\n", __func__); + return; + } + + val = readl(control_phy->pcie_pcs); + val &= ~(OMAP_CTRL_PCIE_PCS_MASK << + OMAP_CTRL_PCIE_PCS_DELAY_COUNT_SHIFT); + val |= (delay << OMAP_CTRL_PCIE_PCS_DELAY_COUNT_SHIFT); + writel(val, control_phy->pcie_pcs); +} +EXPORT_SYMBOL_GPL(omap_control_pcie_pcs); + +/** + * omap_control_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_phy_power(struct device *dev, int on) +{ + u32 val; + unsigned long rate; + struct omap_control_phy *control_phy; + + if (IS_ERR(dev) || !dev) { + pr_err("%s: invalid device\n", __func__); + return; + } + + control_phy = dev_get_drvdata(dev); + if (!control_phy) { + dev_err(dev, "%s: invalid control phy device\n", __func__); + return; + } + + if (control_phy->type == OMAP_CTRL_TYPE_OTGHS) + return; + + val = readl(control_phy->power); + + switch (control_phy->type) { + case OMAP_CTRL_TYPE_USB2: + if (on) + val &= ~OMAP_CTRL_DEV_PHY_PD; + else + val |= OMAP_CTRL_DEV_PHY_PD; + break; + + case OMAP_CTRL_TYPE_PCIE: + case OMAP_CTRL_TYPE_PIPE3: + rate = clk_get_rate(control_phy->sys_clk); + rate = rate/1000000; + + if (on) { + val &= ~(OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK | + OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_MASK); + val |= OMAP_CTRL_PIPE3_PHY_TX_RX_POWERON << + OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT; + val |= rate << + OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT; + } else { + val &= ~OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK; + val |= OMAP_CTRL_PIPE3_PHY_TX_RX_POWEROFF << + OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT; + } + break; + + case OMAP_CTRL_TYPE_DRA7USB2: + if (on) + val &= ~OMAP_CTRL_USB2_PHY_PD; + else + val |= OMAP_CTRL_USB2_PHY_PD; + break; + + case OMAP_CTRL_TYPE_AM437USB2: + if (on) { + val &= ~(AM437X_CTRL_USB2_PHY_PD | + AM437X_CTRL_USB2_OTG_PD); + val |= (AM437X_CTRL_USB2_OTGVDET_EN | + AM437X_CTRL_USB2_OTGSESSEND_EN); + } else { + val &= ~(AM437X_CTRL_USB2_OTGVDET_EN | + AM437X_CTRL_USB2_OTGSESSEND_EN); + val |= (AM437X_CTRL_USB2_PHY_PD | + AM437X_CTRL_USB2_OTG_PD); + } + break; + default: + dev_err(dev, "%s: type %d not recognized\n", + __func__, control_phy->type); + break; + } + + writel(val, control_phy->power); +} +EXPORT_SYMBOL_GPL(omap_control_phy_power); + +/** + * omap_control_usb_host_mode - set AVALID, VBUSVALID and ID pin in grounded + * @ctrl_phy: struct omap_control_phy * + * + * 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_phy *ctrl_phy) +{ + u32 val; + + val = readl(ctrl_phy->otghs_control); + val &= ~(OMAP_CTRL_DEV_IDDIG | OMAP_CTRL_DEV_SESSEND); + val |= OMAP_CTRL_DEV_AVALID | OMAP_CTRL_DEV_VBUSVALID; + writel(val, ctrl_phy->otghs_control); +} + +/** + * omap_control_usb_device_mode - set AVALID, VBUSVALID and ID pin in high + * impedance + * @ctrl_phy: struct omap_control_phy * + * + * 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_phy *ctrl_phy) +{ + u32 val; + + val = readl(ctrl_phy->otghs_control); + val &= ~OMAP_CTRL_DEV_SESSEND; + val |= OMAP_CTRL_DEV_IDDIG | OMAP_CTRL_DEV_AVALID | + OMAP_CTRL_DEV_VBUSVALID; + writel(val, ctrl_phy->otghs_control); +} + +/** + * omap_control_usb_set_sessionend - Enable SESSIONEND and IDIG to high + * impedance + * @ctrl_phy: struct omap_control_phy * + * + * 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_phy *ctrl_phy) +{ + u32 val; + + val = readl(ctrl_phy->otghs_control); + val &= ~(OMAP_CTRL_DEV_AVALID | OMAP_CTRL_DEV_VBUSVALID); + val |= OMAP_CTRL_DEV_IDDIG | OMAP_CTRL_DEV_SESSEND; + writel(val, ctrl_phy->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_phy *ctrl_phy; + + if (IS_ERR(dev) || !dev) + return; + + ctrl_phy = dev_get_drvdata(dev); + if (!ctrl_phy) { + dev_err(dev, "Invalid control phy device\n"); + return; + } + + if (ctrl_phy->type != OMAP_CTRL_TYPE_OTGHS) + return; + + switch (mode) { + case USB_MODE_HOST: + omap_control_usb_host_mode(ctrl_phy); + break; + case USB_MODE_DEVICE: + omap_control_usb_device_mode(ctrl_phy); + break; + case USB_MODE_DISCONNECT: + omap_control_usb_set_sessionend(ctrl_phy); + break; + default: + dev_vdbg(dev, "invalid omap control usb mode\n"); + } +} +EXPORT_SYMBOL_GPL(omap_control_usb_set_mode); + +static const enum omap_control_phy_type otghs_data = OMAP_CTRL_TYPE_OTGHS; +static const enum omap_control_phy_type usb2_data = OMAP_CTRL_TYPE_USB2; +static const enum omap_control_phy_type pipe3_data = OMAP_CTRL_TYPE_PIPE3; +static const enum omap_control_phy_type pcie_data = OMAP_CTRL_TYPE_PCIE; +static const enum omap_control_phy_type dra7usb2_data = OMAP_CTRL_TYPE_DRA7USB2; +static const enum omap_control_phy_type am437usb2_data = OMAP_CTRL_TYPE_AM437USB2; + +static const struct of_device_id omap_control_phy_id_table[] = { + { + .compatible = "ti,control-phy-otghs", + .data = &otghs_data, + }, + { + .compatible = "ti,control-phy-usb2", + .data = &usb2_data, + }, + { + .compatible = "ti,control-phy-pipe3", + .data = &pipe3_data, + }, + { + .compatible = "ti,control-phy-pcie", + .data = &pcie_data, + }, + { + .compatible = "ti,control-phy-usb2-dra7", + .data = &dra7usb2_data, + }, + { + .compatible = "ti,control-phy-usb2-am437", + .data = &am437usb2_data, + }, + {}, +}; +MODULE_DEVICE_TABLE(of, omap_control_phy_id_table); + +static int omap_control_phy_probe(struct platform_device *pdev) +{ + struct resource *res; + const struct of_device_id *of_id; + struct omap_control_phy *control_phy; + + of_id = of_match_device(omap_control_phy_id_table, &pdev->dev); + if (!of_id) + return -EINVAL; + + control_phy = devm_kzalloc(&pdev->dev, sizeof(*control_phy), + GFP_KERNEL); + if (!control_phy) + return -ENOMEM; + + control_phy->dev = &pdev->dev; + control_phy->type = *(enum omap_control_phy_type *)of_id->data; + + if (control_phy->type == OMAP_CTRL_TYPE_OTGHS) { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "otghs_control"); + control_phy->otghs_control = devm_ioremap_resource( + &pdev->dev, res); + if (IS_ERR(control_phy->otghs_control)) + return PTR_ERR(control_phy->otghs_control); + } else { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "power"); + control_phy->power = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(control_phy->power)) { + dev_err(&pdev->dev, "Couldn't get power register\n"); + return PTR_ERR(control_phy->power); + } + } + + if (control_phy->type == OMAP_CTRL_TYPE_PIPE3 || + control_phy->type == OMAP_CTRL_TYPE_PCIE) { + control_phy->sys_clk = devm_clk_get(control_phy->dev, + "sys_clkin"); + if (IS_ERR(control_phy->sys_clk)) { + pr_err("%s: unable to get sys_clkin\n", __func__); + return -EINVAL; + } + } + + if (control_phy->type == OMAP_CTRL_TYPE_PCIE) { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "pcie_pcs"); + control_phy->pcie_pcs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(control_phy->pcie_pcs)) + return PTR_ERR(control_phy->pcie_pcs); + } + + dev_set_drvdata(control_phy->dev, control_phy); + + return 0; +} + +static struct platform_driver omap_control_phy_driver = { + .probe = omap_control_phy_probe, + .driver = { + .name = "omap-control-phy", + .of_match_table = omap_control_phy_id_table, + }, +}; + +static int __init omap_control_phy_init(void) +{ + return platform_driver_register(&omap_control_phy_driver); +} +subsys_initcall(omap_control_phy_init); + +static void __exit omap_control_phy_exit(void) +{ + platform_driver_unregister(&omap_control_phy_driver); +} +module_exit(omap_control_phy_exit); + +MODULE_ALIAS("platform:omap_control_phy"); +MODULE_AUTHOR("Texas Instruments Inc."); +MODULE_DESCRIPTION("OMAP Control Module PHY Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/phy/ti/phy-omap-usb2.c b/drivers/phy/ti/phy-omap-usb2.c new file mode 100644 index 000000000000..fe909fd8144f --- /dev/null +++ b/drivers/phy/ti/phy-omap-usb2.c @@ -0,0 +1,439 @@ +/* + * omap-usb2.c - USB PHY, talking to musb controller in OMAP. + * + * Copyright (C) 2012 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/io.h> +#include <linux/phy/omap_usb.h> +#include <linux/usb/phy_companion.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/pm_runtime.h> +#include <linux/delay.h> +#include <linux/phy/omap_control_phy.h> +#include <linux/phy/phy.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> +#include <linux/of_platform.h> + +#define USB2PHY_DISCON_BYP_LATCH (1 << 31) +#define USB2PHY_ANA_CONFIG1 0x4c + +/** + * omap_usb2_set_comparator - links the comparator present in the sytem with + * this phy + * @comparator - the companion phy(comparator) for this phy + * + * The phy companion driver should call this API passing the phy_companion + * filled with set_vbus and start_srp to be used by usb phy. + * + * For use by phy companion driver + */ +int omap_usb2_set_comparator(struct phy_companion *comparator) +{ + struct omap_usb *phy; + struct usb_phy *x = usb_get_phy(USB_PHY_TYPE_USB2); + + if (IS_ERR(x)) + return -ENODEV; + + phy = phy_to_omapusb(x); + phy->comparator = comparator; + return 0; +} +EXPORT_SYMBOL_GPL(omap_usb2_set_comparator); + +static int omap_usb_set_vbus(struct usb_otg *otg, bool enabled) +{ + struct omap_usb *phy = phy_to_omapusb(otg->usb_phy); + + if (!phy->comparator) + return -ENODEV; + + return phy->comparator->set_vbus(phy->comparator, enabled); +} + +static int omap_usb_start_srp(struct usb_otg *otg) +{ + struct omap_usb *phy = phy_to_omapusb(otg->usb_phy); + + if (!phy->comparator) + return -ENODEV; + + return phy->comparator->start_srp(phy->comparator); +} + +static int omap_usb_set_host(struct usb_otg *otg, struct usb_bus *host) +{ + otg->host = host; + if (!host) + otg->state = OTG_STATE_UNDEFINED; + + return 0; +} + +static int omap_usb_set_peripheral(struct usb_otg *otg, + struct usb_gadget *gadget) +{ + otg->gadget = gadget; + if (!gadget) + otg->state = OTG_STATE_UNDEFINED; + + return 0; +} + +static int omap_usb_phy_power(struct omap_usb *phy, int on) +{ + u32 val; + int ret; + + if (!phy->syscon_phy_power) { + omap_control_phy_power(phy->control_dev, on); + return 0; + } + + if (on) + val = phy->power_on; + else + val = phy->power_off; + + ret = regmap_update_bits(phy->syscon_phy_power, phy->power_reg, + phy->mask, val); + return ret; +} + +static int omap_usb_power_off(struct phy *x) +{ + struct omap_usb *phy = phy_get_drvdata(x); + + return omap_usb_phy_power(phy, false); +} + +static int omap_usb_power_on(struct phy *x) +{ + struct omap_usb *phy = phy_get_drvdata(x); + + return omap_usb_phy_power(phy, true); +} + +static int omap_usb2_disable_clocks(struct omap_usb *phy) +{ + clk_disable(phy->wkupclk); + if (!IS_ERR(phy->optclk)) + clk_disable(phy->optclk); + + return 0; +} + +static int omap_usb2_enable_clocks(struct omap_usb *phy) +{ + int ret; + + ret = clk_enable(phy->wkupclk); + 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; +} + +static int omap_usb_init(struct phy *x) +{ + struct omap_usb *phy = phy_get_drvdata(x); + u32 val; + + omap_usb2_enable_clocks(phy); + + if (phy->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) { + /* + * + * Reduce the sensitivity of internal PHY by enabling the + * DISCON_BYP_LATCH of the USB2PHY_ANA_CONFIG1 register. This + * resolves issues with certain devices which can otherwise + * be prone to false disconnects. + * + */ + val = omap_usb_readl(phy->phy_base, USB2PHY_ANA_CONFIG1); + val |= USB2PHY_DISCON_BYP_LATCH; + omap_usb_writel(phy->phy_base, USB2PHY_ANA_CONFIG1, val); + } + + return 0; +} + +static int omap_usb_exit(struct phy *x) +{ + struct omap_usb *phy = phy_get_drvdata(x); + + return omap_usb2_disable_clocks(phy); +} + +static const struct phy_ops ops = { + .init = omap_usb_init, + .exit = omap_usb_exit, + .power_on = omap_usb_power_on, + .power_off = omap_usb_power_off, + .owner = THIS_MODULE, +}; + +static const struct usb_phy_data omap_usb2_data = { + .label = "omap_usb2", + .flags = OMAP_USB2_HAS_START_SRP | OMAP_USB2_HAS_SET_VBUS, + .mask = OMAP_DEV_PHY_PD, + .power_off = OMAP_DEV_PHY_PD, +}; + +static const struct usb_phy_data omap5_usb2_data = { + .label = "omap5_usb2", + .flags = 0, + .mask = OMAP_DEV_PHY_PD, + .power_off = OMAP_DEV_PHY_PD, +}; + +static const struct usb_phy_data dra7x_usb2_data = { + .label = "dra7x_usb2", + .flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT, + .mask = OMAP_DEV_PHY_PD, + .power_off = OMAP_DEV_PHY_PD, +}; + +static const struct usb_phy_data dra7x_usb2_phy2_data = { + .label = "dra7x_usb2_phy2", + .flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT, + .mask = OMAP_USB2_PHY_PD, + .power_off = OMAP_USB2_PHY_PD, +}; + +static const struct usb_phy_data am437x_usb2_data = { + .label = "am437x_usb2", + .flags = 0, + .mask = AM437X_USB2_PHY_PD | AM437X_USB2_OTG_PD | + AM437X_USB2_OTGVDET_EN | AM437X_USB2_OTGSESSEND_EN, + .power_on = AM437X_USB2_OTGVDET_EN | AM437X_USB2_OTGSESSEND_EN, + .power_off = AM437X_USB2_PHY_PD | AM437X_USB2_OTG_PD, +}; + +static const struct of_device_id omap_usb2_id_table[] = { + { + .compatible = "ti,omap-usb2", + .data = &omap_usb2_data, + }, + { + .compatible = "ti,omap5-usb2", + .data = &omap5_usb2_data, + }, + { + .compatible = "ti,dra7x-usb2", + .data = &dra7x_usb2_data, + }, + { + .compatible = "ti,dra7x-usb2-phy2", + .data = &dra7x_usb2_phy2_data, + }, + { + .compatible = "ti,am437x-usb2", + .data = &am437x_usb2_data, + }, + {}, +}; +MODULE_DEVICE_TABLE(of, omap_usb2_id_table); + +static int omap_usb2_probe(struct platform_device *pdev) +{ + struct omap_usb *phy; + struct phy *generic_phy; + struct resource *res; + struct phy_provider *phy_provider; + struct usb_otg *otg; + struct device_node *node = pdev->dev.of_node; + struct device_node *control_node; + struct platform_device *control_pdev; + const struct of_device_id *of_id; + struct usb_phy_data *phy_data; + + of_id = of_match_device(omap_usb2_id_table, &pdev->dev); + + if (!of_id) + return -EINVAL; + + phy_data = (struct usb_phy_data *)of_id->data; + + phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL); + if (!phy) + return -ENOMEM; + + otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL); + if (!otg) + return -ENOMEM; + + phy->dev = &pdev->dev; + + phy->phy.dev = phy->dev; + phy->phy.label = phy_data->label; + phy->phy.otg = otg; + phy->phy.type = USB_PHY_TYPE_USB2; + phy->mask = phy_data->mask; + phy->power_on = phy_data->power_on; + phy->power_off = phy_data->power_off; + + if (phy_data->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) { + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + phy->phy_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(phy->phy_base)) + return PTR_ERR(phy->phy_base); + phy->flags |= OMAP_USB2_CALIBRATE_FALSE_DISCONNECT; + } + + phy->syscon_phy_power = syscon_regmap_lookup_by_phandle(node, + "syscon-phy-power"); + if (IS_ERR(phy->syscon_phy_power)) { + dev_dbg(&pdev->dev, + "can't get syscon-phy-power, using control device\n"); + phy->syscon_phy_power = NULL; + + control_node = of_parse_phandle(node, "ctrl-module", 0); + if (!control_node) { + 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"); + return -EINVAL; + } + phy->control_dev = &control_pdev->dev; + } else { + if (of_property_read_u32_index(node, + "syscon-phy-power", 1, + &phy->power_reg)) { + dev_err(&pdev->dev, + "couldn't get power reg. offset\n"); + return -EINVAL; + } + } + + otg->set_host = omap_usb_set_host; + otg->set_peripheral = omap_usb_set_peripheral; + if (phy_data->flags & OMAP_USB2_HAS_SET_VBUS) + otg->set_vbus = omap_usb_set_vbus; + if (phy_data->flags & OMAP_USB2_HAS_START_SRP) + otg->start_srp = omap_usb_start_srp; + otg->usb_phy = &phy->phy; + + platform_set_drvdata(pdev, phy); + pm_runtime_enable(phy->dev); + + generic_phy = devm_phy_create(phy->dev, NULL, &ops); + if (IS_ERR(generic_phy)) { + pm_runtime_disable(phy->dev); + return PTR_ERR(generic_phy); + } + + phy_set_drvdata(generic_phy, phy); + omap_usb_power_off(generic_phy); + + phy_provider = devm_of_phy_provider_register(phy->dev, + of_phy_simple_xlate); + if (IS_ERR(phy_provider)) { + pm_runtime_disable(phy->dev); + return PTR_ERR(phy_provider); + } + + phy->wkupclk = devm_clk_get(phy->dev, "wkupclk"); + if (IS_ERR(phy->wkupclk)) { + dev_warn(&pdev->dev, "unable to get wkupclk, trying old name\n"); + 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"); + pm_runtime_disable(phy->dev); + return PTR_ERR(phy->wkupclk); + } else { + dev_warn(&pdev->dev, + "found usb_phy_cm_clk32k, please fix DTS\n"); + } + } + clk_prepare(phy->wkupclk); + + phy->optclk = devm_clk_get(phy->dev, "refclk"); + if (IS_ERR(phy->optclk)) { + dev_dbg(&pdev->dev, "unable to get refclk, trying old name\n"); + phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m"); + if (IS_ERR(phy->optclk)) { + dev_dbg(&pdev->dev, + "unable to get usb_otg_ss_refclk960m\n"); + } else { + dev_warn(&pdev->dev, + "found usb_otg_ss_refclk960m, please fix DTS\n"); + } + } + + if (!IS_ERR(phy->optclk)) + clk_prepare(phy->optclk); + + usb_add_phy_dev(&phy->phy); + + return 0; +} + +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); + pm_runtime_disable(phy->dev); + + return 0; +} + +static struct platform_driver omap_usb2_driver = { + .probe = omap_usb2_probe, + .remove = omap_usb2_remove, + .driver = { + .name = "omap-usb2", + .of_match_table = omap_usb2_id_table, + }, +}; + +module_platform_driver(omap_usb2_driver); + +MODULE_ALIAS("platform:omap_usb2"); +MODULE_AUTHOR("Texas Instruments Inc."); +MODULE_DESCRIPTION("OMAP USB2 phy driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/phy/ti/phy-ti-pipe3.c b/drivers/phy/ti/phy-ti-pipe3.c new file mode 100644 index 000000000000..9c84d32c6f60 --- /dev/null +++ b/drivers/phy/ti/phy-ti-pipe3.c @@ -0,0 +1,697 @@ +/* + * 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 + * 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/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/phy/omap_control_phy.h> +#include <linux/of_platform.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> + +#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 10 +#define SET_PLL_GO 0x1 +#define PLL_LDOPWDN BIT(15) +#define PLL_TICOPWDN BIT(16) +#define PLL_LOCK 0x2 +#define PLL_IDLE 0x1 + +#define SATA_PLL_SOFT_RESET BIT(18) + +#define PIPE3_PHY_PWRCTL_CLK_CMD_MASK 0x003FC000 +#define PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT 14 + +#define PIPE3_PHY_PWRCTL_CLK_FREQ_MASK 0xFFC00000 +#define PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT 22 + +#define PIPE3_PHY_TX_RX_POWERON 0x3 +#define PIPE3_PHY_TX_RX_POWEROFF 0x0 + +#define PCIE_PCS_MASK 0xFF0000 +#define PCIE_PCS_DELAY_COUNT_SHIFT 0x10 + +/* + * This is an Empirical value that works, need to confirm the actual + * 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 /* in milliseconds */ +#define PLL_LOCK_TIME 100 /* in milliseconds */ + +struct pipe3_dpll_params { + u16 m; + u8 n; + u8 freq:3; + u8 sd; + u32 mf; +}; + +struct pipe3_dpll_map { + unsigned long rate; + struct pipe3_dpll_params params; +}; + +struct ti_pipe3 { + void __iomem *pll_ctrl_base; + struct device *dev; + struct device *control_dev; + struct clk *wkupclk; + struct clk *sys_clk; + struct clk *refclk; + struct clk *div_clk; + struct pipe3_dpll_map *dpll_map; + struct regmap *phy_power_syscon; /* ctrl. reg. acces */ + struct regmap *pcs_syscon; /* ctrl. reg. acces */ + struct regmap *dpll_reset_syscon; /* ctrl. reg. acces */ + unsigned int dpll_reset_reg; /* reg. index within syscon */ + unsigned int power_reg; /* power reg. index within syscon */ + unsigned int pcie_pcs_reg; /* pcs reg. index in syscon */ + bool sata_refclk_enabled; +}; + +static struct pipe3_dpll_map dpll_map_usb[] = { + {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 */ + {20000000, {1000, 7, 4, 10, 0} }, /* 20 MHz */ + {26000000, {1250, 12, 4, 20, 0} }, /* 26 MHz */ + {38400000, {3125, 47, 4, 20, 92843} }, /* 38.4 MHz */ + { }, /* Terminator */ +}; + +static struct pipe3_dpll_map dpll_map_sata[] = { + {12000000, {1000, 7, 4, 6, 0} }, /* 12 MHz */ + {16800000, {714, 7, 4, 6, 0} }, /* 16.8 MHz */ + {19200000, {625, 7, 4, 6, 0} }, /* 19.2 MHz */ + {20000000, {600, 7, 4, 6, 0} }, /* 20 MHz */ + {26000000, {461, 7, 4, 6, 0} }, /* 26 MHz */ + {38400000, {312, 7, 4, 6, 0} }, /* 38.4 MHz */ + { }, /* Terminator */ +}; + +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(struct ti_pipe3 *phy) +{ + unsigned long rate; + struct pipe3_dpll_map *dpll_map = phy->dpll_map; + + rate = clk_get_rate(phy->sys_clk); + + for (; dpll_map->rate; dpll_map++) { + if (rate == dpll_map->rate) + return &dpll_map->params; + } + + dev_err(phy->dev, "No DPLL configuration for %lu Hz SYS CLK\n", rate); + + return NULL; +} + +static int ti_pipe3_enable_clocks(struct ti_pipe3 *phy); +static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy); + +static int ti_pipe3_power_off(struct phy *x) +{ + u32 val; + int ret; + struct ti_pipe3 *phy = phy_get_drvdata(x); + + if (!phy->phy_power_syscon) { + omap_control_phy_power(phy->control_dev, 0); + return 0; + } + + val = PIPE3_PHY_TX_RX_POWEROFF << PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT; + + ret = regmap_update_bits(phy->phy_power_syscon, phy->power_reg, + PIPE3_PHY_PWRCTL_CLK_CMD_MASK, val); + return ret; +} + +static int ti_pipe3_power_on(struct phy *x) +{ + u32 val; + u32 mask; + int ret; + unsigned long rate; + struct ti_pipe3 *phy = phy_get_drvdata(x); + + if (!phy->phy_power_syscon) { + omap_control_phy_power(phy->control_dev, 1); + return 0; + } + + rate = clk_get_rate(phy->sys_clk); + if (!rate) { + dev_err(phy->dev, "Invalid clock rate\n"); + return -EINVAL; + } + rate = rate / 1000000; + mask = OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK | + OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_MASK; + val = PIPE3_PHY_TX_RX_POWERON << PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT; + val |= rate << OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT; + + ret = regmap_update_bits(phy->phy_power_syscon, phy->power_reg, + mask, val); + return ret; +} + +static int ti_pipe3_dpll_wait_lock(struct ti_pipe3 *phy) +{ + u32 val; + unsigned long timeout; + + timeout = jiffies + msecs_to_jiffies(PLL_LOCK_TIME); + do { + cpu_relax(); + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS); + if (val & PLL_LOCK) + return 0; + } while (!time_after(jiffies, timeout)); + + dev_err(phy->dev, "DPLL failed to lock\n"); + return -EBUSY; +} + +static int ti_pipe3_dpll_program(struct ti_pipe3 *phy) +{ + u32 val; + struct pipe3_dpll_params *dpll_params; + + dpll_params = ti_pipe3_get_dpll_params(phy); + if (!dpll_params) + return -EINVAL; + + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1); + val &= ~PLL_REGN_MASK; + val |= dpll_params->n << PLL_REGN_SHIFT; + ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val); + + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2); + val &= ~PLL_SELFREQDCO_MASK; + val |= dpll_params->freq << PLL_SELFREQDCO_SHIFT; + ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val); + + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1); + val &= ~PLL_REGM_MASK; + val |= dpll_params->m << PLL_REGM_SHIFT; + ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val); + + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION4); + val &= ~PLL_REGM_F_MASK; + val |= dpll_params->mf << PLL_REGM_F_SHIFT; + ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION4, val); + + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION3); + val &= ~PLL_SD_MASK; + val |= dpll_params->sd << PLL_SD_SHIFT; + ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION3, val); + + ti_pipe3_writel(phy->pll_ctrl_base, PLL_GO, SET_PLL_GO); + + return ti_pipe3_dpll_wait_lock(phy); +} + +static int ti_pipe3_init(struct phy *x) +{ + struct ti_pipe3 *phy = phy_get_drvdata(x); + u32 val; + int ret = 0; + + ti_pipe3_enable_clocks(phy); + /* + * Set pcie_pcs register to 0x96 for proper functioning of phy + * as recommended in AM572x TRM SPRUHZ6, section 18.5.2.2, table + * 18-1804. + */ + if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-pcie")) { + if (!phy->pcs_syscon) { + omap_control_pcie_pcs(phy->control_dev, 0x96); + return 0; + } + + val = 0x96 << OMAP_CTRL_PCIE_PCS_DELAY_COUNT_SHIFT; + ret = regmap_update_bits(phy->pcs_syscon, phy->pcie_pcs_reg, + PCIE_PCS_MASK, val); + return ret; + } + + /* Bring it out of IDLE if it is IDLE */ + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2); + if (val & PLL_IDLE) { + val &= ~PLL_IDLE; + ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val); + ret = ti_pipe3_dpll_wait_lock(phy); + } + + /* SATA has issues if re-programmed when locked */ + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS); + if ((val & PLL_LOCK) && of_device_is_compatible(phy->dev->of_node, + "ti,phy-pipe3-sata")) + return ret; + + /* Program the DPLL */ + ret = ti_pipe3_dpll_program(phy); + if (ret) { + ti_pipe3_disable_clocks(phy); + return -EINVAL; + } + + return ret; +} + +static int ti_pipe3_exit(struct phy *x) +{ + struct ti_pipe3 *phy = phy_get_drvdata(x); + u32 val; + unsigned long timeout; + + /* If dpll_reset_syscon is not present we wont power down SATA DPLL + * due to Errata i783 + */ + if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-sata") && + !phy->dpll_reset_syscon) + return 0; + + /* PCIe doesn't have internal DPLL */ + if (!of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-pcie")) { + /* Put DPLL in IDLE mode */ + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2); + val |= PLL_IDLE; + ti_pipe3_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val); + + /* wait for LDO and Oscillator to power down */ + timeout = jiffies + msecs_to_jiffies(PLL_IDLE_TIME); + do { + cpu_relax(); + val = ti_pipe3_readl(phy->pll_ctrl_base, PLL_STATUS); + if ((val & PLL_TICOPWDN) && (val & PLL_LDOPWDN)) + break; + } while (!time_after(jiffies, timeout)); + + if (!(val & PLL_TICOPWDN) || !(val & PLL_LDOPWDN)) { + dev_err(phy->dev, "Failed to power down: PLL_STATUS 0x%x\n", + val); + return -EBUSY; + } + } + + /* i783: SATA needs control bit toggle after PLL unlock */ + if (of_device_is_compatible(phy->dev->of_node, "ti,phy-pipe3-sata")) { + regmap_update_bits(phy->dpll_reset_syscon, phy->dpll_reset_reg, + SATA_PLL_SOFT_RESET, SATA_PLL_SOFT_RESET); + regmap_update_bits(phy->dpll_reset_syscon, phy->dpll_reset_reg, + SATA_PLL_SOFT_RESET, 0); + } + + ti_pipe3_disable_clocks(phy); + + return 0; +} +static const struct phy_ops ops = { + .init = ti_pipe3_init, + .exit = ti_pipe3_exit, + .power_on = ti_pipe3_power_on, + .power_off = ti_pipe3_power_off, + .owner = THIS_MODULE, +}; + +static const struct of_device_id ti_pipe3_id_table[]; + +static int ti_pipe3_get_clk(struct ti_pipe3 *phy) +{ + struct clk *clk; + struct device *dev = phy->dev; + struct device_node *node = dev->of_node; + + phy->refclk = devm_clk_get(dev, "refclk"); + if (IS_ERR(phy->refclk)) { + dev_err(dev, "unable to get refclk\n"); + /* older DTBs have missing refclk in SATA PHY + * so don't bail out in case of SATA PHY. + */ + if (!of_device_is_compatible(node, "ti,phy-pipe3-sata")) + return PTR_ERR(phy->refclk); + } + + if (!of_device_is_compatible(node, "ti,phy-pipe3-sata")) { + phy->wkupclk = devm_clk_get(dev, "wkupclk"); + if (IS_ERR(phy->wkupclk)) { + dev_err(dev, "unable to get wkupclk\n"); + return PTR_ERR(phy->wkupclk); + } + } else { + phy->wkupclk = ERR_PTR(-ENODEV); + } + + if (!of_device_is_compatible(node, "ti,phy-pipe3-pcie") || + phy->phy_power_syscon) { + phy->sys_clk = devm_clk_get(dev, "sysclk"); + if (IS_ERR(phy->sys_clk)) { + dev_err(dev, "unable to get sysclk\n"); + return -EINVAL; + } + } + + if (of_device_is_compatible(node, "ti,phy-pipe3-pcie")) { + clk = devm_clk_get(dev, "dpll_ref"); + if (IS_ERR(clk)) { + dev_err(dev, "unable to get dpll ref clk\n"); + return PTR_ERR(clk); + } + clk_set_rate(clk, 1500000000); + + clk = devm_clk_get(dev, "dpll_ref_m2"); + if (IS_ERR(clk)) { + dev_err(dev, "unable to get dpll ref m2 clk\n"); + return PTR_ERR(clk); + } + clk_set_rate(clk, 100000000); + + clk = devm_clk_get(dev, "phy-div"); + if (IS_ERR(clk)) { + dev_err(dev, "unable to get phy-div clk\n"); + return PTR_ERR(clk); + } + clk_set_rate(clk, 100000000); + + phy->div_clk = devm_clk_get(dev, "div-clk"); + if (IS_ERR(phy->div_clk)) { + dev_err(dev, "unable to get div-clk\n"); + return PTR_ERR(phy->div_clk); + } + } else { + phy->div_clk = ERR_PTR(-ENODEV); + } + + return 0; +} + +static int ti_pipe3_get_sysctrl(struct ti_pipe3 *phy) +{ + struct device *dev = phy->dev; + struct device_node *node = dev->of_node; + struct device_node *control_node; + struct platform_device *control_pdev; + + phy->phy_power_syscon = syscon_regmap_lookup_by_phandle(node, + "syscon-phy-power"); + if (IS_ERR(phy->phy_power_syscon)) { + dev_dbg(dev, + "can't get syscon-phy-power, using control device\n"); + phy->phy_power_syscon = NULL; + } else { + if (of_property_read_u32_index(node, + "syscon-phy-power", 1, + &phy->power_reg)) { + dev_err(dev, "couldn't get power reg. offset\n"); + return -EINVAL; + } + } + + if (!phy->phy_power_syscon) { + control_node = of_parse_phandle(node, "ctrl-module", 0); + if (!control_node) { + dev_err(dev, "Failed to get control device phandle\n"); + return -EINVAL; + } + + control_pdev = of_find_device_by_node(control_node); + if (!control_pdev) { + dev_err(dev, "Failed to get control device\n"); + return -EINVAL; + } + + phy->control_dev = &control_pdev->dev; + } + + if (of_device_is_compatible(node, "ti,phy-pipe3-pcie")) { + phy->pcs_syscon = syscon_regmap_lookup_by_phandle(node, + "syscon-pcs"); + if (IS_ERR(phy->pcs_syscon)) { + dev_dbg(dev, + "can't get syscon-pcs, using omap control\n"); + phy->pcs_syscon = NULL; + } else { + if (of_property_read_u32_index(node, + "syscon-pcs", 1, + &phy->pcie_pcs_reg)) { + dev_err(dev, + "couldn't get pcie pcs reg. offset\n"); + return -EINVAL; + } + } + } + + if (of_device_is_compatible(node, "ti,phy-pipe3-sata")) { + phy->dpll_reset_syscon = syscon_regmap_lookup_by_phandle(node, + "syscon-pllreset"); + if (IS_ERR(phy->dpll_reset_syscon)) { + dev_info(dev, + "can't get syscon-pllreset, sata dpll won't idle\n"); + phy->dpll_reset_syscon = NULL; + } else { + if (of_property_read_u32_index(node, + "syscon-pllreset", 1, + &phy->dpll_reset_reg)) { + dev_err(dev, + "couldn't get pllreset reg. offset\n"); + return -EINVAL; + } + } + } + + return 0; +} + +static int ti_pipe3_get_pll_base(struct ti_pipe3 *phy) +{ + struct resource *res; + const struct of_device_id *match; + struct device *dev = phy->dev; + struct device_node *node = dev->of_node; + struct platform_device *pdev = to_platform_device(dev); + + if (of_device_is_compatible(node, "ti,phy-pipe3-pcie")) + return 0; + + match = of_match_device(ti_pipe3_id_table, dev); + if (!match) + return -EINVAL; + + phy->dpll_map = (struct pipe3_dpll_map *)match->data; + if (!phy->dpll_map) { + dev_err(dev, "no DPLL data\n"); + return -EINVAL; + } + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "pll_ctrl"); + phy->pll_ctrl_base = devm_ioremap_resource(dev, res); + return PTR_ERR_OR_ZERO(phy->pll_ctrl_base); +} + +static int ti_pipe3_probe(struct platform_device *pdev) +{ + struct ti_pipe3 *phy; + struct phy *generic_phy; + struct phy_provider *phy_provider; + struct device_node *node = pdev->dev.of_node; + struct device *dev = &pdev->dev; + int ret; + + phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); + if (!phy) + return -ENOMEM; + + phy->dev = dev; + + ret = ti_pipe3_get_pll_base(phy); + if (ret) + return ret; + + ret = ti_pipe3_get_sysctrl(phy); + if (ret) + return ret; + + ret = ti_pipe3_get_clk(phy); + if (ret) + return ret; + + platform_set_drvdata(pdev, phy); + pm_runtime_enable(dev); + + /* + * Prevent auto-disable of refclk for SATA PHY due to Errata i783 + */ + if (of_device_is_compatible(node, "ti,phy-pipe3-sata")) { + if (!IS_ERR(phy->refclk)) { + clk_prepare_enable(phy->refclk); + phy->sata_refclk_enabled = true; + } + } + + generic_phy = devm_phy_create(dev, NULL, &ops); + if (IS_ERR(generic_phy)) + return PTR_ERR(generic_phy); + + phy_set_drvdata(generic_phy, phy); + + ti_pipe3_power_off(generic_phy); + + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + return PTR_ERR_OR_ZERO(phy_provider); +} + +static int ti_pipe3_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); + + return 0; +} + +static int ti_pipe3_enable_clocks(struct ti_pipe3 *phy) +{ + int ret = 0; + + if (!IS_ERR(phy->refclk)) { + ret = clk_prepare_enable(phy->refclk); + if (ret) { + dev_err(phy->dev, "Failed to enable refclk %d\n", ret); + return ret; + } + } + + if (!IS_ERR(phy->wkupclk)) { + ret = clk_prepare_enable(phy->wkupclk); + if (ret) { + dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret); + goto disable_refclk; + } + } + + if (!IS_ERR(phy->div_clk)) { + ret = clk_prepare_enable(phy->div_clk); + if (ret) { + dev_err(phy->dev, "Failed to enable div_clk %d\n", ret); + goto disable_wkupclk; + } + } + + return 0; + +disable_wkupclk: + if (!IS_ERR(phy->wkupclk)) + clk_disable_unprepare(phy->wkupclk); + +disable_refclk: + if (!IS_ERR(phy->refclk)) + clk_disable_unprepare(phy->refclk); + + return ret; +} + +static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy) +{ + if (!IS_ERR(phy->wkupclk)) + clk_disable_unprepare(phy->wkupclk); + if (!IS_ERR(phy->refclk)) { + clk_disable_unprepare(phy->refclk); + /* + * SATA refclk needs an additional disable as we left it + * on in probe to avoid Errata i783 + */ + if (phy->sata_refclk_enabled) { + clk_disable_unprepare(phy->refclk); + phy->sata_refclk_enabled = false; + } + } + + if (!IS_ERR(phy->div_clk)) + clk_disable_unprepare(phy->div_clk); +} + +static const struct of_device_id ti_pipe3_id_table[] = { + { + .compatible = "ti,phy-usb3", + .data = dpll_map_usb, + }, + { + .compatible = "ti,omap-usb3", + .data = dpll_map_usb, + }, + { + .compatible = "ti,phy-pipe3-sata", + .data = dpll_map_sata, + }, + { + .compatible = "ti,phy-pipe3-pcie", + }, + {} +}; +MODULE_DEVICE_TABLE(of, ti_pipe3_id_table); + +static struct platform_driver ti_pipe3_driver = { + .probe = ti_pipe3_probe, + .remove = ti_pipe3_remove, + .driver = { + .name = "ti-pipe3", + .of_match_table = ti_pipe3_id_table, + }, +}; + +module_platform_driver(ti_pipe3_driver); + +MODULE_ALIAS("platform:ti_pipe3"); +MODULE_AUTHOR("Texas Instruments Inc."); +MODULE_DESCRIPTION("TI PIPE3 phy driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/phy/ti/phy-tusb1210.c b/drivers/phy/ti/phy-tusb1210.c new file mode 100644 index 000000000000..bb3fb031c478 --- /dev/null +++ b/drivers/phy/ti/phy-tusb1210.c @@ -0,0 +1,146 @@ +/** + * tusb1210.c - TUSB1210 USB ULPI PHY driver + * + * Copyright (C) 2015 Intel Corporation + * + * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com> + * + * 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 <linux/module.h> +#include <linux/ulpi/driver.h> +#include <linux/gpio/consumer.h> +#include <linux/phy/ulpi_phy.h> + +#define TUSB1210_VENDOR_SPECIFIC2 0x80 +#define TUSB1210_VENDOR_SPECIFIC2_IHSTX_SHIFT 0 +#define TUSB1210_VENDOR_SPECIFIC2_ZHSDRV_SHIFT 4 +#define TUSB1210_VENDOR_SPECIFIC2_DP_SHIFT 6 + +struct tusb1210 { + struct ulpi *ulpi; + struct phy *phy; + struct gpio_desc *gpio_reset; + struct gpio_desc *gpio_cs; + u8 vendor_specific2; +}; + +static int tusb1210_power_on(struct phy *phy) +{ + struct tusb1210 *tusb = phy_get_drvdata(phy); + + gpiod_set_value_cansleep(tusb->gpio_reset, 1); + gpiod_set_value_cansleep(tusb->gpio_cs, 1); + + /* Restore the optional eye diagram optimization value */ + if (tusb->vendor_specific2) + ulpi_write(tusb->ulpi, TUSB1210_VENDOR_SPECIFIC2, + tusb->vendor_specific2); + + return 0; +} + +static int tusb1210_power_off(struct phy *phy) +{ + struct tusb1210 *tusb = phy_get_drvdata(phy); + + gpiod_set_value_cansleep(tusb->gpio_reset, 0); + gpiod_set_value_cansleep(tusb->gpio_cs, 0); + + return 0; +} + +static const struct phy_ops phy_ops = { + .power_on = tusb1210_power_on, + .power_off = tusb1210_power_off, + .owner = THIS_MODULE, +}; + +static int tusb1210_probe(struct ulpi *ulpi) +{ + struct tusb1210 *tusb; + u8 val, reg; + + tusb = devm_kzalloc(&ulpi->dev, sizeof(*tusb), GFP_KERNEL); + if (!tusb) + return -ENOMEM; + + tusb->gpio_reset = devm_gpiod_get_optional(&ulpi->dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(tusb->gpio_reset)) + return PTR_ERR(tusb->gpio_reset); + + gpiod_set_value_cansleep(tusb->gpio_reset, 1); + + tusb->gpio_cs = devm_gpiod_get_optional(&ulpi->dev, "cs", + GPIOD_OUT_LOW); + if (IS_ERR(tusb->gpio_cs)) + return PTR_ERR(tusb->gpio_cs); + + gpiod_set_value_cansleep(tusb->gpio_cs, 1); + + /* + * VENDOR_SPECIFIC2 register in TUSB1210 can be used for configuring eye + * diagram optimization and DP/DM swap. + */ + + /* High speed output drive strength configuration */ + device_property_read_u8(&ulpi->dev, "ihstx", &val); + reg = val << TUSB1210_VENDOR_SPECIFIC2_IHSTX_SHIFT; + + /* High speed output impedance configuration */ + device_property_read_u8(&ulpi->dev, "zhsdrv", &val); + reg |= val << TUSB1210_VENDOR_SPECIFIC2_ZHSDRV_SHIFT; + + /* DP/DM swap control */ + device_property_read_u8(&ulpi->dev, "datapolarity", &val); + reg |= val << TUSB1210_VENDOR_SPECIFIC2_DP_SHIFT; + + if (reg) { + ulpi_write(ulpi, TUSB1210_VENDOR_SPECIFIC2, reg); + tusb->vendor_specific2 = reg; + } + + tusb->phy = ulpi_phy_create(ulpi, &phy_ops); + if (IS_ERR(tusb->phy)) + return PTR_ERR(tusb->phy); + + tusb->ulpi = ulpi; + + phy_set_drvdata(tusb->phy, tusb); + ulpi_set_drvdata(ulpi, tusb); + return 0; +} + +static void tusb1210_remove(struct ulpi *ulpi) +{ + struct tusb1210 *tusb = ulpi_get_drvdata(ulpi); + + ulpi_phy_destroy(ulpi, tusb->phy); +} + +#define TI_VENDOR_ID 0x0451 + +static const struct ulpi_device_id tusb1210_ulpi_id[] = { + { TI_VENDOR_ID, 0x1507, }, + { }, +}; +MODULE_DEVICE_TABLE(ulpi, tusb1210_ulpi_id); + +static struct ulpi_driver tusb1210_driver = { + .id_table = tusb1210_ulpi_id, + .probe = tusb1210_probe, + .remove = tusb1210_remove, + .driver = { + .name = "tusb1210", + .owner = THIS_MODULE, + }, +}; + +module_ulpi_driver(tusb1210_driver); + +MODULE_AUTHOR("Intel Corporation"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("TUSB1210 ULPI PHY driver"); diff --git a/drivers/phy/ti/phy-twl4030-usb.c b/drivers/phy/ti/phy-twl4030-usb.c new file mode 100644 index 000000000000..2990b3965460 --- /dev/null +++ b/drivers/phy/ti/phy-twl4030-usb.c @@ -0,0 +1,839 @@ +/* + * twl4030_usb - TWL4030 USB transceiver, talking to OMAP OTG controller + * + * Copyright (C) 2004-2007 Texas Instruments + * Copyright (C) 2008 Nokia Corporation + * Contact: Felipe Balbi <felipe.balbi@nokia.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. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Current status: + * - HS USB ULPI mode works. + * - 3-pin mode support may be added in future. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/workqueue.h> +#include <linux/io.h> +#include <linux/delay.h> +#include <linux/usb/otg.h> +#include <linux/phy/phy.h> +#include <linux/pm_runtime.h> +#include <linux/usb/musb.h> +#include <linux/usb/ulpi.h> +#include <linux/i2c/twl.h> +#include <linux/regulator/consumer.h> +#include <linux/err.h> +#include <linux/slab.h> + +/* Register defines */ + +#define MCPC_CTRL 0x30 +#define MCPC_CTRL_RTSOL (1 << 7) +#define MCPC_CTRL_EXTSWR (1 << 6) +#define MCPC_CTRL_EXTSWC (1 << 5) +#define MCPC_CTRL_VOICESW (1 << 4) +#define MCPC_CTRL_OUT64K (1 << 3) +#define MCPC_CTRL_RTSCTSSW (1 << 2) +#define MCPC_CTRL_HS_UART (1 << 0) + +#define MCPC_IO_CTRL 0x33 +#define MCPC_IO_CTRL_MICBIASEN (1 << 5) +#define MCPC_IO_CTRL_CTS_NPU (1 << 4) +#define MCPC_IO_CTRL_RXD_PU (1 << 3) +#define MCPC_IO_CTRL_TXDTYP (1 << 2) +#define MCPC_IO_CTRL_CTSTYP (1 << 1) +#define MCPC_IO_CTRL_RTSTYP (1 << 0) + +#define MCPC_CTRL2 0x36 +#define MCPC_CTRL2_MCPC_CK_EN (1 << 0) + +#define OTHER_FUNC_CTRL 0x80 +#define OTHER_FUNC_CTRL_BDIS_ACON_EN (1 << 4) +#define OTHER_FUNC_CTRL_FIVEWIRE_MODE (1 << 2) + +#define OTHER_IFC_CTRL 0x83 +#define OTHER_IFC_CTRL_OE_INT_EN (1 << 6) +#define OTHER_IFC_CTRL_CEA2011_MODE (1 << 5) +#define OTHER_IFC_CTRL_FSLSSERIALMODE_4PIN (1 << 4) +#define OTHER_IFC_CTRL_HIZ_ULPI_60MHZ_OUT (1 << 3) +#define OTHER_IFC_CTRL_HIZ_ULPI (1 << 2) +#define OTHER_IFC_CTRL_ALT_INT_REROUTE (1 << 0) + +#define OTHER_INT_EN_RISE 0x86 +#define OTHER_INT_EN_FALL 0x89 +#define OTHER_INT_STS 0x8C +#define OTHER_INT_LATCH 0x8D +#define OTHER_INT_VB_SESS_VLD (1 << 7) +#define OTHER_INT_DM_HI (1 << 6) /* not valid for "latch" reg */ +#define OTHER_INT_DP_HI (1 << 5) /* not valid for "latch" reg */ +#define OTHER_INT_BDIS_ACON (1 << 3) /* not valid for "fall" regs */ +#define OTHER_INT_MANU (1 << 1) +#define OTHER_INT_ABNORMAL_STRESS (1 << 0) + +#define ID_STATUS 0x96 +#define ID_RES_FLOAT (1 << 4) +#define ID_RES_440K (1 << 3) +#define ID_RES_200K (1 << 2) +#define ID_RES_102K (1 << 1) +#define ID_RES_GND (1 << 0) + +#define POWER_CTRL 0xAC +#define POWER_CTRL_OTG_ENAB (1 << 5) + +#define OTHER_IFC_CTRL2 0xAF +#define OTHER_IFC_CTRL2_ULPI_STP_LOW (1 << 4) +#define OTHER_IFC_CTRL2_ULPI_TXEN_POL (1 << 3) +#define OTHER_IFC_CTRL2_ULPI_4PIN_2430 (1 << 2) +#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_MASK (3 << 0) /* bits 0 and 1 */ +#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT1N (0 << 0) +#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT2N (1 << 0) + +#define REG_CTRL_EN 0xB2 +#define REG_CTRL_ERROR 0xB5 +#define ULPI_I2C_CONFLICT_INTEN (1 << 0) + +#define OTHER_FUNC_CTRL2 0xB8 +#define OTHER_FUNC_CTRL2_VBAT_TIMER_EN (1 << 0) + +/* following registers do not have separate _clr and _set registers */ +#define VBUS_DEBOUNCE 0xC0 +#define ID_DEBOUNCE 0xC1 +#define VBAT_TIMER 0xD3 +#define PHY_PWR_CTRL 0xFD +#define PHY_PWR_PHYPWD (1 << 0) +#define PHY_CLK_CTRL 0xFE +#define PHY_CLK_CTRL_CLOCKGATING_EN (1 << 2) +#define PHY_CLK_CTRL_CLK32K_EN (1 << 1) +#define REQ_PHY_DPLL_CLK (1 << 0) +#define PHY_CLK_CTRL_STS 0xFF +#define PHY_DPLL_CLK (1 << 0) + +/* In module TWL_MODULE_PM_MASTER */ +#define STS_HW_CONDITIONS 0x0F + +/* In module TWL_MODULE_PM_RECEIVER */ +#define VUSB_DEDICATED1 0x7D +#define VUSB_DEDICATED2 0x7E +#define VUSB1V5_DEV_GRP 0x71 +#define VUSB1V5_TYPE 0x72 +#define VUSB1V5_REMAP 0x73 +#define VUSB1V8_DEV_GRP 0x74 +#define VUSB1V8_TYPE 0x75 +#define VUSB1V8_REMAP 0x76 +#define VUSB3V1_DEV_GRP 0x77 +#define VUSB3V1_TYPE 0x78 +#define VUSB3V1_REMAP 0x79 + +/* In module TWL4030_MODULE_INTBR */ +#define PMBR1 0x0D +#define GPIO_USB_4PIN_ULPI_2430C (3 << 0) + +/* + * If VBUS is valid or ID is ground, then we know a + * cable is present and we need to be runtime-enabled + */ +static inline bool cable_present(enum musb_vbus_id_status stat) +{ + return stat == MUSB_VBUS_VALID || + stat == MUSB_ID_GROUND; +} + +struct twl4030_usb { + struct usb_phy phy; + struct device *dev; + + /* TWL4030 internal USB regulator supplies */ + struct regulator *usb1v5; + struct regulator *usb1v8; + struct regulator *usb3v1; + + /* for vbus reporting with irqs disabled */ + struct mutex lock; + + /* pin configuration */ + enum twl4030_usb_mode usb_mode; + + int irq; + enum musb_vbus_id_status linkstat; + bool vbus_supplied; + bool musb_mailbox_pending; + + struct delayed_work id_workaround_work; +}; + +/* internal define on top of container_of */ +#define phy_to_twl(x) container_of((x), struct twl4030_usb, phy) + +/*-------------------------------------------------------------------------*/ + +static int twl4030_i2c_write_u8_verify(struct twl4030_usb *twl, + u8 module, u8 data, u8 address) +{ + u8 check; + + if ((twl_i2c_write_u8(module, data, address) >= 0) && + (twl_i2c_read_u8(module, &check, address) >= 0) && + (check == data)) + return 0; + dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n", + 1, module, address, check, data); + + /* Failed once: Try again */ + if ((twl_i2c_write_u8(module, data, address) >= 0) && + (twl_i2c_read_u8(module, &check, address) >= 0) && + (check == data)) + return 0; + dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n", + 2, module, address, check, data); + + /* Failed again: Return error */ + return -EBUSY; +} + +#define twl4030_usb_write_verify(twl, address, data) \ + twl4030_i2c_write_u8_verify(twl, TWL_MODULE_USB, (data), (address)) + +static inline int twl4030_usb_write(struct twl4030_usb *twl, + u8 address, u8 data) +{ + int ret = 0; + + ret = twl_i2c_write_u8(TWL_MODULE_USB, data, address); + if (ret < 0) + dev_dbg(twl->dev, + "TWL4030:USB:Write[0x%x] Error %d\n", address, ret); + return ret; +} + +static inline int twl4030_readb(struct twl4030_usb *twl, u8 module, u8 address) +{ + u8 data; + int ret = 0; + + ret = twl_i2c_read_u8(module, &data, address); + if (ret >= 0) + ret = data; + else + dev_dbg(twl->dev, + "TWL4030:readb[0x%x,0x%x] Error %d\n", + module, address, ret); + + return ret; +} + +static inline int twl4030_usb_read(struct twl4030_usb *twl, u8 address) +{ + return twl4030_readb(twl, TWL_MODULE_USB, address); +} + +/*-------------------------------------------------------------------------*/ + +static inline int +twl4030_usb_set_bits(struct twl4030_usb *twl, u8 reg, u8 bits) +{ + return twl4030_usb_write(twl, ULPI_SET(reg), bits); +} + +static inline int +twl4030_usb_clear_bits(struct twl4030_usb *twl, u8 reg, u8 bits) +{ + return twl4030_usb_write(twl, ULPI_CLR(reg), bits); +} + +/*-------------------------------------------------------------------------*/ + +static bool twl4030_is_driving_vbus(struct twl4030_usb *twl) +{ + int ret; + + ret = twl4030_usb_read(twl, PHY_CLK_CTRL_STS); + if (ret < 0 || !(ret & PHY_DPLL_CLK)) + /* + * if clocks are off, registers are not updated, + * but we can assume we don't drive VBUS in this case + */ + return false; + + ret = twl4030_usb_read(twl, ULPI_OTG_CTRL); + if (ret < 0) + return false; + + return (ret & (ULPI_OTG_DRVVBUS | ULPI_OTG_CHRGVBUS)) ? true : false; +} + +static enum musb_vbus_id_status + twl4030_usb_linkstat(struct twl4030_usb *twl) +{ + int status; + enum musb_vbus_id_status linkstat = MUSB_UNKNOWN; + + twl->vbus_supplied = false; + + /* + * For ID/VBUS sensing, see manual section 15.4.8 ... + * except when using only battery backup power, two + * comparators produce VBUS_PRES and ID_PRES signals, + * which don't match docs elsewhere. But ... BIT(7) + * and BIT(2) of STS_HW_CONDITIONS, respectively, do + * seem to match up. If either is true the USB_PRES + * signal is active, the OTG module is activated, and + * its interrupt may be raised (may wake the system). + */ + status = twl4030_readb(twl, TWL_MODULE_PM_MASTER, STS_HW_CONDITIONS); + if (status < 0) + dev_err(twl->dev, "USB link status err %d\n", status); + else if (status & (BIT(7) | BIT(2))) { + if (status & BIT(7)) { + if (twl4030_is_driving_vbus(twl)) + status &= ~BIT(7); + else + twl->vbus_supplied = true; + } + + if (status & BIT(2)) + linkstat = MUSB_ID_GROUND; + else if (status & BIT(7)) + linkstat = MUSB_VBUS_VALID; + else + linkstat = MUSB_VBUS_OFF; + } else { + if (twl->linkstat != MUSB_UNKNOWN) + linkstat = MUSB_VBUS_OFF; + } + + kobject_uevent(&twl->dev->kobj, linkstat == MUSB_VBUS_VALID + ? KOBJ_ONLINE : KOBJ_OFFLINE); + + dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n", + status, status, linkstat); + + /* REVISIT this assumes host and peripheral controllers + * are registered, and that both are active... + */ + + return linkstat; +} + +static void twl4030_usb_set_mode(struct twl4030_usb *twl, int mode) +{ + twl->usb_mode = mode; + + switch (mode) { + case T2_USB_MODE_ULPI: + twl4030_usb_clear_bits(twl, ULPI_IFC_CTRL, + ULPI_IFC_CTRL_CARKITMODE); + twl4030_usb_set_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB); + twl4030_usb_clear_bits(twl, ULPI_FUNC_CTRL, + ULPI_FUNC_CTRL_XCVRSEL_MASK | + ULPI_FUNC_CTRL_OPMODE_MASK); + break; + case -1: + /* FIXME: power on defaults */ + break; + default: + dev_err(twl->dev, "unsupported T2 transceiver mode %d\n", + mode); + break; + } +} + +static void twl4030_i2c_access(struct twl4030_usb *twl, int on) +{ + unsigned long timeout; + int val = twl4030_usb_read(twl, PHY_CLK_CTRL); + + if (val >= 0) { + if (on) { + /* enable DPLL to access PHY registers over I2C */ + val |= REQ_PHY_DPLL_CLK; + WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL, + (u8)val) < 0); + + timeout = jiffies + HZ; + while (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) & + PHY_DPLL_CLK) + && time_before(jiffies, timeout)) + udelay(10); + if (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) & + PHY_DPLL_CLK)) + dev_err(twl->dev, "Timeout setting T2 HSUSB " + "PHY DPLL clock\n"); + } else { + /* let ULPI control the DPLL clock */ + val &= ~REQ_PHY_DPLL_CLK; + WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL, + (u8)val) < 0); + } + } +} + +static void __twl4030_phy_power(struct twl4030_usb *twl, int on) +{ + u8 pwr = twl4030_usb_read(twl, PHY_PWR_CTRL); + + if (on) + pwr &= ~PHY_PWR_PHYPWD; + else + pwr |= PHY_PWR_PHYPWD; + + WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0); +} + +static int __maybe_unused twl4030_usb_runtime_suspend(struct device *dev) +{ + struct twl4030_usb *twl = dev_get_drvdata(dev); + + dev_dbg(twl->dev, "%s\n", __func__); + + __twl4030_phy_power(twl, 0); + regulator_disable(twl->usb1v5); + regulator_disable(twl->usb1v8); + regulator_disable(twl->usb3v1); + + return 0; +} + +static int __maybe_unused twl4030_usb_runtime_resume(struct device *dev) +{ + struct twl4030_usb *twl = dev_get_drvdata(dev); + int res; + + dev_dbg(twl->dev, "%s\n", __func__); + + res = regulator_enable(twl->usb3v1); + if (res) + dev_err(twl->dev, "Failed to enable usb3v1\n"); + + res = regulator_enable(twl->usb1v8); + if (res) + dev_err(twl->dev, "Failed to enable usb1v8\n"); + + /* + * Disabling usb3v1 regulator (= writing 0 to VUSB3V1_DEV_GRP + * in twl4030) resets the VUSB_DEDICATED2 register. This reset + * enables VUSB3V1_SLEEP bit that remaps usb3v1 ACTIVE state to + * SLEEP. We work around this by clearing the bit after usv3v1 + * is re-activated. This ensures that VUSB3V1 is really active. + */ + twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2); + + res = regulator_enable(twl->usb1v5); + if (res) + dev_err(twl->dev, "Failed to enable usb1v5\n"); + + __twl4030_phy_power(twl, 1); + twl4030_usb_write(twl, PHY_CLK_CTRL, + twl4030_usb_read(twl, PHY_CLK_CTRL) | + (PHY_CLK_CTRL_CLOCKGATING_EN | + PHY_CLK_CTRL_CLK32K_EN)); + + twl4030_i2c_access(twl, 1); + twl4030_usb_set_mode(twl, twl->usb_mode); + if (twl->usb_mode == T2_USB_MODE_ULPI) + twl4030_i2c_access(twl, 0); + /* + * According to the TPS65950 TRM, there has to be at least 50ms + * delay between setting POWER_CTRL_OTG_ENAB and enabling charging + * so wait here so that a fully enabled phy can be expected after + * resume + */ + msleep(50); + return 0; +} + +static int twl4030_phy_power_off(struct phy *phy) +{ + struct twl4030_usb *twl = phy_get_drvdata(phy); + + dev_dbg(twl->dev, "%s\n", __func__); + + return 0; +} + +static int twl4030_phy_power_on(struct phy *phy) +{ + struct twl4030_usb *twl = phy_get_drvdata(phy); + + dev_dbg(twl->dev, "%s\n", __func__); + pm_runtime_get_sync(twl->dev); + schedule_delayed_work(&twl->id_workaround_work, HZ); + pm_runtime_mark_last_busy(twl->dev); + pm_runtime_put_autosuspend(twl->dev); + + return 0; +} + +static int twl4030_usb_ldo_init(struct twl4030_usb *twl) +{ + /* Enable writing to power configuration registers */ + twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1, + TWL4030_PM_MASTER_PROTECT_KEY); + + twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2, + TWL4030_PM_MASTER_PROTECT_KEY); + + /* Keep VUSB3V1 LDO in sleep state until VBUS/ID change detected*/ + /*twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);*/ + + /* input to VUSB3V1 LDO is from VBAT, not VBUS */ + twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1); + + /* Initialize 3.1V regulator */ + twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB3V1_DEV_GRP); + + twl->usb3v1 = devm_regulator_get(twl->dev, "usb3v1"); + if (IS_ERR(twl->usb3v1)) + return -ENODEV; + + twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE); + + /* Initialize 1.5V regulator */ + twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V5_DEV_GRP); + + twl->usb1v5 = devm_regulator_get(twl->dev, "usb1v5"); + if (IS_ERR(twl->usb1v5)) + return -ENODEV; + + twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE); + + /* Initialize 1.8V regulator */ + twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V8_DEV_GRP); + + twl->usb1v8 = devm_regulator_get(twl->dev, "usb1v8"); + if (IS_ERR(twl->usb1v8)) + return -ENODEV; + + twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE); + + /* disable access to power configuration registers */ + twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0, + TWL4030_PM_MASTER_PROTECT_KEY); + + return 0; +} + +static ssize_t twl4030_usb_vbus_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct twl4030_usb *twl = dev_get_drvdata(dev); + int ret = -EINVAL; + + mutex_lock(&twl->lock); + ret = sprintf(buf, "%s\n", + twl->vbus_supplied ? "on" : "off"); + mutex_unlock(&twl->lock); + + return ret; +} +static DEVICE_ATTR(vbus, 0444, twl4030_usb_vbus_show, NULL); + +static irqreturn_t twl4030_usb_irq(int irq, void *_twl) +{ + struct twl4030_usb *twl = _twl; + enum musb_vbus_id_status status; + bool status_changed = false; + int err; + + status = twl4030_usb_linkstat(twl); + + mutex_lock(&twl->lock); + if (status >= 0 && status != twl->linkstat) { + status_changed = + cable_present(twl->linkstat) != + cable_present(status); + twl->linkstat = status; + } + mutex_unlock(&twl->lock); + + if (status_changed) { + /* FIXME add a set_power() method so that B-devices can + * configure the charger appropriately. It's not always + * correct to consume VBUS power, and how much current to + * consume is a function of the USB configuration chosen + * by the host. + * + * REVISIT usb_gadget_vbus_connect(...) as needed, ditto + * its disconnect() sibling, when changing to/from the + * USB_LINK_VBUS state. musb_hdrc won't care until it + * starts to handle softconnect right. + */ + if (cable_present(status)) { + pm_runtime_get_sync(twl->dev); + } else { + pm_runtime_mark_last_busy(twl->dev); + pm_runtime_put_autosuspend(twl->dev); + } + twl->musb_mailbox_pending = true; + } + if (twl->musb_mailbox_pending) { + err = musb_mailbox(status); + if (!err) + twl->musb_mailbox_pending = false; + } + + /* don't schedule during sleep - irq works right then */ + if (status == MUSB_ID_GROUND && pm_runtime_active(twl->dev)) { + cancel_delayed_work(&twl->id_workaround_work); + schedule_delayed_work(&twl->id_workaround_work, HZ); + } + + if (irq) + sysfs_notify(&twl->dev->kobj, NULL, "vbus"); + + return IRQ_HANDLED; +} + +static void twl4030_id_workaround_work(struct work_struct *work) +{ + struct twl4030_usb *twl = container_of(work, struct twl4030_usb, + id_workaround_work.work); + + twl4030_usb_irq(0, twl); +} + +static int twl4030_phy_init(struct phy *phy) +{ + struct twl4030_usb *twl = phy_get_drvdata(phy); + + pm_runtime_get_sync(twl->dev); + twl->linkstat = MUSB_UNKNOWN; + schedule_delayed_work(&twl->id_workaround_work, HZ); + pm_runtime_mark_last_busy(twl->dev); + pm_runtime_put_autosuspend(twl->dev); + + return 0; +} + +static int twl4030_set_peripheral(struct usb_otg *otg, + struct usb_gadget *gadget) +{ + if (!otg) + return -ENODEV; + + otg->gadget = gadget; + if (!gadget) + otg->state = OTG_STATE_UNDEFINED; + + return 0; +} + +static int twl4030_set_host(struct usb_otg *otg, struct usb_bus *host) +{ + if (!otg) + return -ENODEV; + + otg->host = host; + if (!host) + otg->state = OTG_STATE_UNDEFINED; + + return 0; +} + +static const struct phy_ops ops = { + .init = twl4030_phy_init, + .power_on = twl4030_phy_power_on, + .power_off = twl4030_phy_power_off, + .owner = THIS_MODULE, +}; + +static const struct dev_pm_ops twl4030_usb_pm_ops = { + SET_RUNTIME_PM_OPS(twl4030_usb_runtime_suspend, + twl4030_usb_runtime_resume, NULL) +}; + +static int twl4030_usb_probe(struct platform_device *pdev) +{ + struct twl4030_usb_data *pdata = dev_get_platdata(&pdev->dev); + struct twl4030_usb *twl; + struct phy *phy; + int status, err; + struct usb_otg *otg; + struct device_node *np = pdev->dev.of_node; + struct phy_provider *phy_provider; + + twl = devm_kzalloc(&pdev->dev, sizeof(*twl), GFP_KERNEL); + if (!twl) + return -ENOMEM; + + if (np) + of_property_read_u32(np, "usb_mode", + (enum twl4030_usb_mode *)&twl->usb_mode); + else if (pdata) { + twl->usb_mode = pdata->usb_mode; + } else { + dev_err(&pdev->dev, "twl4030 initialized without pdata\n"); + return -EINVAL; + } + + otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL); + if (!otg) + return -ENOMEM; + + twl->dev = &pdev->dev; + twl->irq = platform_get_irq(pdev, 0); + twl->vbus_supplied = false; + twl->linkstat = MUSB_UNKNOWN; + twl->musb_mailbox_pending = false; + + twl->phy.dev = twl->dev; + twl->phy.label = "twl4030"; + twl->phy.otg = otg; + twl->phy.type = USB_PHY_TYPE_USB2; + + otg->usb_phy = &twl->phy; + otg->set_host = twl4030_set_host; + otg->set_peripheral = twl4030_set_peripheral; + + phy = devm_phy_create(twl->dev, NULL, &ops); + if (IS_ERR(phy)) { + dev_dbg(&pdev->dev, "Failed to create PHY\n"); + return PTR_ERR(phy); + } + + phy_set_drvdata(phy, twl); + + phy_provider = devm_of_phy_provider_register(twl->dev, + of_phy_simple_xlate); + if (IS_ERR(phy_provider)) + return PTR_ERR(phy_provider); + + /* init mutex for workqueue */ + mutex_init(&twl->lock); + + INIT_DELAYED_WORK(&twl->id_workaround_work, twl4030_id_workaround_work); + + err = twl4030_usb_ldo_init(twl); + if (err) { + dev_err(&pdev->dev, "ldo init failed\n"); + return err; + } + usb_add_phy_dev(&twl->phy); + + platform_set_drvdata(pdev, twl); + if (device_create_file(&pdev->dev, &dev_attr_vbus)) + dev_warn(&pdev->dev, "could not create sysfs file\n"); + + ATOMIC_INIT_NOTIFIER_HEAD(&twl->phy.notifier); + + pm_runtime_use_autosuspend(&pdev->dev); + pm_runtime_set_autosuspend_delay(&pdev->dev, 2000); + pm_runtime_enable(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); + + /* Our job is to use irqs and status from the power module + * to keep the transceiver disabled when nothing's connected. + * + * FIXME we actually shouldn't start enabling it until the + * USB controller drivers have said they're ready, by calling + * set_host() and/or set_peripheral() ... OTG_capable boards + * need both handles, otherwise just one suffices. + */ + status = devm_request_threaded_irq(twl->dev, twl->irq, NULL, + twl4030_usb_irq, IRQF_TRIGGER_FALLING | + IRQF_TRIGGER_RISING | IRQF_ONESHOT, "twl4030_usb", twl); + if (status < 0) { + dev_dbg(&pdev->dev, "can't get IRQ %d, err %d\n", + twl->irq, status); + return status; + } + + if (pdata) + err = phy_create_lookup(phy, "usb", "musb-hdrc.0"); + if (err) + return err; + + pm_runtime_mark_last_busy(&pdev->dev); + pm_runtime_put_autosuspend(twl->dev); + + dev_info(&pdev->dev, "Initialized TWL4030 USB module\n"); + return 0; +} + +static int twl4030_usb_remove(struct platform_device *pdev) +{ + struct twl4030_usb *twl = platform_get_drvdata(pdev); + int val; + + usb_remove_phy(&twl->phy); + pm_runtime_get_sync(twl->dev); + cancel_delayed_work(&twl->id_workaround_work); + device_remove_file(twl->dev, &dev_attr_vbus); + + /* set transceiver mode to power on defaults */ + twl4030_usb_set_mode(twl, -1); + + /* idle ulpi before powering off */ + if (cable_present(twl->linkstat)) + pm_runtime_put_noidle(twl->dev); + pm_runtime_mark_last_busy(twl->dev); + pm_runtime_dont_use_autosuspend(&pdev->dev); + pm_runtime_put_sync(twl->dev); + pm_runtime_disable(twl->dev); + + /* autogate 60MHz ULPI clock, + * clear dpll clock request for i2c access, + * disable 32KHz + */ + val = twl4030_usb_read(twl, PHY_CLK_CTRL); + if (val >= 0) { + val |= PHY_CLK_CTRL_CLOCKGATING_EN; + val &= ~(PHY_CLK_CTRL_CLK32K_EN | REQ_PHY_DPLL_CLK); + twl4030_usb_write(twl, PHY_CLK_CTRL, (u8)val); + } + + /* disable complete OTG block */ + twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id twl4030_usb_id_table[] = { + { .compatible = "ti,twl4030-usb" }, + {} +}; +MODULE_DEVICE_TABLE(of, twl4030_usb_id_table); +#endif + +static struct platform_driver twl4030_usb_driver = { + .probe = twl4030_usb_probe, + .remove = twl4030_usb_remove, + .driver = { + .name = "twl4030_usb", + .pm = &twl4030_usb_pm_ops, + .of_match_table = of_match_ptr(twl4030_usb_id_table), + }, +}; + +static int __init twl4030_usb_init(void) +{ + return platform_driver_register(&twl4030_usb_driver); +} +subsys_initcall(twl4030_usb_init); + +static void __exit twl4030_usb_exit(void) +{ + platform_driver_unregister(&twl4030_usb_driver); +} +module_exit(twl4030_usb_exit); + +MODULE_ALIAS("platform:twl4030_usb"); +MODULE_AUTHOR("Texas Instruments, Inc, Nokia Corporation"); +MODULE_DESCRIPTION("TWL4030 USB transceiver driver"); +MODULE_LICENSE("GPL"); |