diff options
Diffstat (limited to 'drivers/usb/dwc3/dwc3-omap.c')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-omap.c | 167 |
1 files changed, 116 insertions, 51 deletions
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c index 077f110bd74..7f7ea62e961 100644 --- a/drivers/usb/dwc3/dwc3-omap.c +++ b/drivers/usb/dwc3/dwc3-omap.c @@ -6,34 +6,14 @@ * Authors: Felipe Balbi <balbi@ti.com>, * Sebastian Andrzej Siewior <bigeasy@linutronix.de> * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions, and the following disclaimer, - * without modification. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. The names of the above-listed copyright holders may not be used - * to endorse or promote products derived from this software without - * specific prior written permission. + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 of + * the License as published by the Free Software Foundation. * - * ALTERNATIVELY, this software may be distributed under the terms of the - * GNU General Public License ("GPL") version 2, as published by the Free - * Software Foundation. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS - * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, - * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * 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> @@ -43,13 +23,15 @@ #include <linux/spinlock.h> #include <linux/platform_device.h> #include <linux/platform_data/dwc3-omap.h> -#include <linux/usb/dwc3-omap.h> #include <linux/pm_runtime.h> #include <linux/dma-mapping.h> #include <linux/ioport.h> #include <linux/io.h> #include <linux/of.h> #include <linux/of_platform.h> +#include <linux/extcon.h> +#include <linux/extcon/of_extcon.h> +#include <linux/regulator/consumer.h> #include <linux/usb/otg.h> @@ -155,9 +137,21 @@ struct dwc3_omap { u32 revision; u32 dma_status:1; + + struct extcon_specific_cable_nb extcon_vbus_dev; + struct extcon_specific_cable_nb extcon_id_dev; + struct notifier_block vbus_nb; + struct notifier_block id_nb; + + struct regulator *vbus_reg; }; -static struct dwc3_omap *_omap; +enum omap_dwc3_vbus_id_status { + OMAP_DWC3_ID_FLOAT, + OMAP_DWC3_ID_GROUND, + OMAP_DWC3_VBUS_OFF, + OMAP_DWC3_VBUS_VALID, +}; static inline u32 dwc3_omap_readl(void __iomem *base, u32 offset) { @@ -221,18 +215,24 @@ static void dwc3_omap_write_irq0_set(struct dwc3_omap *omap, u32 value) omap->irq0_offset, value); } -int dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status) +static void dwc3_omap_set_mailbox(struct dwc3_omap *omap, + enum omap_dwc3_vbus_id_status status) { - u32 val; - struct dwc3_omap *omap = _omap; - - if (!omap) - return -EPROBE_DEFER; + int ret; + u32 val; switch (status) { case OMAP_DWC3_ID_GROUND: dev_dbg(omap->dev, "ID GND\n"); + if (omap->vbus_reg) { + ret = regulator_enable(omap->vbus_reg); + if (ret) { + dev_dbg(omap->dev, "regulator enable failed\n"); + return; + } + } + val = dwc3_omap_read_utmi_status(omap); val &= ~(USBOTGSS_UTMI_OTG_STATUS_IDDIG | USBOTGSS_UTMI_OTG_STATUS_VBUSVALID @@ -255,6 +255,9 @@ int dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status) break; case OMAP_DWC3_ID_FLOAT: + if (omap->vbus_reg) + regulator_disable(omap->vbus_reg); + case OMAP_DWC3_VBUS_OFF: dev_dbg(omap->dev, "VBUS Disconnect\n"); @@ -268,12 +271,9 @@ int dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status) break; default: - dev_dbg(omap->dev, "ID float\n"); + dev_dbg(omap->dev, "invalid state\n"); } - - return 0; } -EXPORT_SYMBOL_GPL(dwc3_omap_mailbox); static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap) { @@ -366,6 +366,32 @@ static void dwc3_omap_disable_irqs(struct dwc3_omap *omap) static u64 dwc3_omap_dma_mask = DMA_BIT_MASK(32); +static int dwc3_omap_id_notifier(struct notifier_block *nb, + unsigned long event, void *ptr) +{ + struct dwc3_omap *omap = container_of(nb, struct dwc3_omap, id_nb); + + if (event) + dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND); + else + dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_FLOAT); + + return NOTIFY_DONE; +} + +static int dwc3_omap_vbus_notifier(struct notifier_block *nb, + unsigned long event, void *ptr) +{ + struct dwc3_omap *omap = container_of(nb, struct dwc3_omap, vbus_nb); + + if (event) + dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID); + else + dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_OFF); + + return NOTIFY_DONE; +} + static int dwc3_omap_probe(struct platform_device *pdev) { struct device_node *node = pdev->dev.of_node; @@ -373,6 +399,8 @@ static int dwc3_omap_probe(struct platform_device *pdev) struct dwc3_omap *omap; struct resource *res; struct device *dev = &pdev->dev; + struct extcon_dev *edev; + struct regulator *vbus_reg = NULL; int ret = -ENOMEM; int irq; @@ -409,10 +437,16 @@ static int dwc3_omap_probe(struct platform_device *pdev) return -EINVAL; } - base = devm_ioremap_nocache(dev, res->start, resource_size(res)); - if (!base) { - dev_err(dev, "ioremap failed\n"); - return -ENOMEM; + base = devm_ioremap_resource(dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + if (of_property_read_bool(node, "vbus-supply")) { + vbus_reg = devm_regulator_get(dev, "vbus"); + if (IS_ERR(vbus_reg)) { + dev_err(dev, "vbus init failed\n"); + return PTR_ERR(vbus_reg); + } } spin_lock_init(&omap->lock); @@ -420,14 +454,9 @@ static int dwc3_omap_probe(struct platform_device *pdev) omap->dev = dev; omap->irq = irq; omap->base = base; + omap->vbus_reg = vbus_reg; dev->dma_mask = &dwc3_omap_dma_mask; - /* - * REVISIT if we ever have two instances of the wrapper, we will be - * in big trouble - */ - _omap = omap; - pm_runtime_enable(dev); ret = pm_runtime_get_sync(dev); if (ret < 0) { @@ -502,14 +531,46 @@ static int dwc3_omap_probe(struct platform_device *pdev) dwc3_omap_enable_irqs(omap); + if (of_property_read_bool(node, "extcon")) { + edev = of_extcon_get_extcon_dev(dev, 0); + if (IS_ERR(edev)) { + dev_vdbg(dev, "couldn't get extcon device\n"); + ret = PTR_ERR(edev); + goto err2; + } + + omap->vbus_nb.notifier_call = dwc3_omap_vbus_notifier; + ret = extcon_register_interest(&omap->extcon_vbus_dev, + edev->name, "USB", &omap->vbus_nb); + if (ret < 0) + dev_vdbg(dev, "failed to register notifier for USB\n"); + omap->id_nb.notifier_call = dwc3_omap_id_notifier; + ret = extcon_register_interest(&omap->extcon_id_dev, edev->name, + "USB-HOST", &omap->id_nb); + if (ret < 0) + dev_vdbg(dev, + "failed to register notifier for USB-HOST\n"); + + if (extcon_get_cable_state(edev, "USB") == true) + dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID); + if (extcon_get_cable_state(edev, "USB-HOST") == true) + dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND); + } + ret = of_platform_populate(node, NULL, NULL, dev); if (ret) { dev_err(&pdev->dev, "failed to create dwc3 core\n"); - goto err2; + goto err3; } return 0; +err3: + if (omap->extcon_vbus_dev.edev) + extcon_unregister_interest(&omap->extcon_vbus_dev); + if (omap->extcon_id_dev.edev) + extcon_unregister_interest(&omap->extcon_id_dev); + err2: dwc3_omap_disable_irqs(omap); @@ -526,6 +587,10 @@ static int dwc3_omap_remove(struct platform_device *pdev) { struct dwc3_omap *omap = platform_get_drvdata(pdev); + if (omap->extcon_vbus_dev.edev) + extcon_unregister_interest(&omap->extcon_vbus_dev); + if (omap->extcon_id_dev.edev) + extcon_unregister_interest(&omap->extcon_id_dev); dwc3_omap_disable_irqs(omap); pm_runtime_put_sync(&pdev->dev); pm_runtime_disable(&pdev->dev); @@ -610,5 +675,5 @@ module_platform_driver(dwc3_omap_driver); MODULE_ALIAS("platform:omap-dwc3"); MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); -MODULE_LICENSE("Dual BSD/GPL"); +MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("DesignWare USB3 OMAP Glue Layer"); 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