/** * dwc3-omap.c - OMAP Specific Glue layer * * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com * * Authors: Felipe Balbi , * Sebastian Andrzej Siewior * * 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. * * 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. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "core.h" /* * All these registers belong to OMAP's Wrapper around the * DesignWare USB3 Core. */ #define USBOTGSS_REVISION 0x0000 #define USBOTGSS_SYSCONFIG 0x0010 #define USBOTGSS_IRQ_EOI 0x0020 #define USBOTGSS_IRQSTATUS_RAW_0 0x0024 #define USBOTGSS_IRQSTATUS_0 0x0028 #define USBOTGSS_IRQENABLE_SET_0 0x002c #define USBOTGSS_IRQENABLE_CLR_0 0x0030 #define USBOTGSS_IRQSTATUS_RAW_1 0x0034 #define USBOTGSS_IRQSTATUS_1 0x0038 #define USBOTGSS_IRQENABLE_SET_1 0x003c #define USBOTGSS_IRQENABLE_CLR_1 0x0040 #define USBOTGSS_UTMI_OTG_CTRL 0x0080 #define USBOTGSS_UTMI_OTG_STATUS 0x0084 #define USBOTGSS_MMRAM_OFFSET 0x0100 #define USBOTGSS_FLADJ 0x0104 #define USBOTGSS_DEBUG_CFG 0x0108 #define USBOTGSS_DEBUG_DATA 0x010c /* SYSCONFIG REGISTER */ #define USBOTGSS_SYSCONFIG_DMADISABLE (1 << 16) /* IRQ_EOI REGISTER */ #define USBOTGSS_IRQ_EOI_LINE_NUMBER (1 << 0) /* IRQS0 BITS */ #define USBOTGSS_IRQO_COREIRQ_ST (1 << 0) /* IRQ1 BITS */ #define USBOTGSS_IRQ1_DMADISABLECLR (1 << 17) #define USBOTGSS_IRQ1_OEVT (1 << 16) #define USBOTGSS_IRQ1_DRVVBUS_RISE (1 << 13) #define USBOTGSS_IRQ1_CHRGVBUS_RISE (1 << 12) #define USBOTGSS_IRQ1_DISCHRGVBUS_RISE (1 << 11) #define USBOTGSS_IRQ1_IDPULLUP_RISE (1 << 8) #define USBOTGSS_IRQ1_DRVVBUS_FALL (1 << 5) #define USBOTGSS_IRQ1_CHRGVBUS_FALL (1 << 4) #define USBOTGSS_IRQ1_DISCHRGVBUS_FALL (1 << 3) #define USBOTGSS_IRQ1_IDPULLUP_FALL (1 << 0) /* UTMI_OTG_CTRL REGISTER */ #define USBOTGSS_UTMI_OTG_CTRL_DRVVBUS (1 << 5) #define USBOTGSS_UTMI_OTG_CTRL_CHRGVBUS (1 << 4) #define USBOTGSS_UTMI_OTG_CTRL_DISCHRGVBUS (1 << 3) #define USBOTGSS_UTMI_OTG_CTRL_IDPULLUP (1 << 0) /* UTMI_OTG_STATUS REGISTER */ #define USBOTGSS_UTMI_OTG_STATUS_SW_MODE (1 << 31) #define USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT (1 << 9) #define USBOTGSS_UTMI_OTG_STATUS_TXBITSTUFFENABLE (1 << 8) #define USBOTGSS_UTMI_OTG_STATUS_IDDIG (1 << 4) #define USBOTGSS_UTMI_OTG_STATUS_SESSEND (1 << 3) #define USBOTGSS_UTMI_OTG_STATUS_SESSVALID (1 << 2) #define USBOTGSS_UTMI_OTG_STATUS_VBUSVALID (1 << 1) struct dwc3_omap { /* device lock */ spinlock_t lock; struct platform_device *usb2_phy; struct platform_device *usb3_phy; struct device *dev; int irq; void __iomem *base; void *context; u32 resource_size; u32 dma_status:1; }; struct dwc3_omap *_omap; static inline u32 dwc3_omap_readl(void __iomem *base, u32 offset) { return readl(base + offset); } static inline void dwc3_omap_writel(void __iomem *base, u32 offset, u32 value) { writel(value, base + offset); } void dwc3_omap_mailbox(enum omap_dwc3_vbus_id_status status) { u32 val; struct dwc3_omap *omap = _omap; switch (status) { case OMAP_DWC3_ID_GROUND: dev_dbg(omap->dev, "ID GND\n"); val = dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS); val &= ~(USBOTGSS_UTMI_OTG_STATUS_IDDIG | USBOTGSS_UTMI_OTG_STATUS_VBUSVALID | USBOTGSS_UTMI_OTG_STATUS_SESSEND); val |= USBOTGSS_UTMI_OTG_STATUS_SESSVALID | USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT; dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS, val); break; case OMAP_DWC3_VBUS_VALID: dev_dbg(omap->dev, "VBUS Connect\n"); val = dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS); val &= ~USBOTGSS_UTMI_OTG_STATUS_SESSEND; val |= USBOTGSS_UTMI_OTG_STATUS_IDDIG | USBOTGSS_UTMI_OTG_STATUS_VBUSVALID | USBOTGSS_UTMI_OTG_STATUS_SESSVALID | USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT; dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS, val); break; case OMAP_DWC3_ID_FLOAT: case OMAP_DWC3_VBUS_OFF: dev_dbg(omap->dev, "VBUS Disconnect\n"); val = dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS); val &= ~(USBOTGSS_UTMI_OTG_STATUS_SESSVALID | USBOTGSS_UTMI_OTG_STATUS_VBUSVALID | USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT); val |= USBOTGSS_UTMI_OTG_STATUS_SESSEND | USBOTGSS_UTMI_OTG_STATUS_IDDIG; dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS, val); break; default: dev_dbg(omap->dev, "ID float\n"); } return; } EXPORT_SYMBOL_GPL(dwc3_omap_mailbox); static int dwc3_omap_register_phys(struct dwc3_omap *omap) { struct nop_usb_xceiv_platform_data pdata; struct platform_device *pdev; int ret; memset(&pdata, 0x00, sizeof(pdata)); pdev = platform_device_alloc("nop_usb_xceiv", 0); if (!pdev) return -ENOMEM; omap->usb2_phy = pdev; pdata.type = USB_PHY_TYPE_USB2; ret = platform_device_add_data(omap->usb2_phy, &pdata, sizeof(pdata)); if (ret) goto err1; pdev = platform_device_alloc("nop_usb_xceiv", 1); if (!pdev) { ret = -ENOMEM; goto err1; } omap->usb3_phy = pdev; pdata.type = USB_PHY_TYPE_USB3; ret = platform_device_add_data(omap->usb3_phy, &pdata, sizeof(pdata)); if (ret) goto err2; ret = platform_device_add(omap->usb2_phy); if (ret) goto err2; ret = platform_device_add(omap->usb3_phy); if (ret) goto err3; return 0; err3: platform_device_del(omap->usb2_phy); err2: platform_device_put(omap->usb3_phy); err1: platform_device_put(omap->usb2_phy); return ret; } static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap) { struct dwc3_omap *omap = _omap; u32 reg; spin_lock(&omap->lock); reg = dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_1); if (reg & USBOTGSS_IRQ1_DMADISABLECLR) { dev_dbg(omap->dev, "DMA Disable was Cleared\n"); omap->dma_status = false; } if (reg & USBOTGSS_IRQ1_OEVT) dev_dbg(omap->dev, "OTG Event\n"); if (reg & USBOTGSS_IRQ1_DRVVBUS_RISE) dev_dbg(omap->dev, "DRVVBUS Rise\n"); if (reg & USBOTGSS_IRQ1_CHRGVBUS_RISE) dev_dbg(omap->dev, "CHRGVBUS Rise\n"); if (reg & USBOTGSS_IRQ1_DISCHRGVBUS_RISE) dev_dbg(omap->dev, "DISCHRGVBUS Rise\n"); if (reg & USBOTGSS_IRQ1_IDPULLUP_RISE) dev_dbg(omap->dev, "IDPULLUP Rise\n"); if (reg & USBOTGSS_IRQ1_DRVVBUS_FALL) dev_dbg(omap->dev, "DRVVBUS Fall\n"); if (reg & USBOTGSS_IRQ1_CHRGVBUS_FALL) dev_dbg(omap->dev, "CHRGVBUS Fall\n"); if (reg & USBOTGSS_IRQ1_DISCHRGVBUS_FALL) dev_dbg(omap->dev, "DISCHRGVBUS Fall\n"); if (reg & USBOTGSS_IRQ1_IDPULLUP_FALL) dev_dbg(omap->dev, "IDPULLUP Fall\n"); dwc3_omap_writel(omap->base, USBOTGSS_IRQSTATUS_1, reg); reg = dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_0); dwc3_omap_writel(omap->base, USBOTGSS_IRQSTATUS_0, reg); spin_unlock(&omap->lock); return IRQ_HANDLED; } static int dwc3_omap_remove_core(struct device *dev, void *c) { struct platform_device *pdev = to_platform_device(dev); platform_device_unregister(pdev); return 0; } static int dwc3_omap_probe(struct platform_device *pdev) { struct dwc3_omap_data *pdata = pdev->dev.platform_data; struct device_node *node = pdev->dev.of_node; struct dwc3_omap *omap; struct resource *res; struct device *dev = &pdev->dev; int size; int ret = -ENOMEM; int irq; const u32 *utmi_mode; u32 reg; void __iomem *base; void *context; omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL); if (!omap) { dev_err(dev, "not enough memory\n"); return -ENOMEM; } platform_set_drvdata(pdev, omap); irq = platform_get_irq(pdev, 1); if (irq < 0) { dev_err(dev, "missing IRQ resource\n"); return -EINVAL; } res = platform_get_resource(pdev, IORESOURCE_MEM, 1); if (!res) { dev_err(dev, "missing memory base resource\n"); return -EINVAL; } base = devm_ioremap_nocache(dev, res->start, resource_size(res)); if (!base) { dev_err(dev, "ioremap failed\n"); return -ENOMEM; } ret = dwc3_omap_register_phys(omap); if (ret) { dev_err(dev, "couldn't register PHYs\n"); return ret; } context = devm_kzalloc(dev, resource_size(res), GFP_KERNEL); if (!context) { dev_err(dev, "couldn't allocate dwc3 context memory\n"); return -ENOMEM; } spin_lock_init(&omap->lock); omap->resource_size = resource_size(res); omap->context = context; omap->dev = dev; omap->irq = irq; omap->base = base; /* * 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) { dev_err(dev, "get_sync failed with err %d\n", ret); return ret; } reg = dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS); utmi_mode = of_get_property(node, "utmi-mode", &size); if (utmi_mode && size == sizeof(*utmi_mode)) { reg |= *utmi_mode; } else { if (!pdata) { dev_dbg(dev, "missing platform data\n"); } else { switch (pdata->utmi_mode) { case DWC3_OMAP_UTMI_MODE_SW: reg |= USBOTGSS_UTMI_OTG_STATUS_SW_MODE; break; case DWC3_OMAP_UTMI_MODE_HW: reg &= ~USBOTGSS_UTMI_OTG_STATUS_SW_MODE; break; default: dev_dbg(dev, "UNKNOWN utmi mode %d\n", pdata->utmi_mode); } } } dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS, reg); /* check the DMA Status */ reg = dwc3_omap_readl(omap->base, USBOTGSS_SYSCONFIG); omap->dma_status = !!(reg & USBOTGSS_SYSCONFIG_DMADISABLE); ret = devm_request_irq(dev, omap->irq, dwc3_omap_interrupt, 0, "dwc3-omap", omap); if (ret) { dev_err(dev, "failed to request IRQ #%d --> %d\n", omap->irq, ret); return ret; } /* enable all IRQs */ reg = USBOTGSS_IRQO_COREIRQ_ST; dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_0, reg); reg = (USBOTGSS_IRQ1_OEVT | USBOTGSS_IRQ1_DRVVBUS_RISE | USBOTGSS_IRQ1_CHRGVBUS_RISE | USBOTGSS_IRQ1_DISCHRGVBUS_RISE | USBOTGSS_IRQ1_IDPULLUP_RISE | USBOTGSS_IRQ1_DRVVBUS_FALL | USBOTGSS_IRQ1_CHRGVBUS_FALL | USBOTGSS_IRQ1_DISCHRGVBUS_FALL | USBOTGSS_IRQ1_IDPULLUP_FALL); dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_1, reg); if (node) { ret = of_platform_populate(node, NULL, NULL, dev); if (ret) { dev_err(&pdev->dev, "failed to add create dwc3 core\n"); return ret; } } return 0; } static int dwc3_omap_remove(struct platform_device *pdev) { struct dwc3_omap *omap = platform_get_drvdata(pdev); platform_device_unregister(omap->usb2_phy); platform_device_unregister(omap->usb3_phy); pm_runtime_put_sync(&pdev->dev); pm_runtime_disable(&pdev->dev); device_for_each_child(&pdev->dev, NULL, dwc3_omap_remove_core); return 0; } static const struct of_device_id of_dwc3_matach[] = { { "ti,dwc3", }, { }, }; MODULE_DEVICE_TABLE(of, of_dwc3_matach); static struct platform_driver dwc3_omap_driver = { .probe = dwc3_omap_probe, .remove = dwc3_omap_remove, .driver = { .name = "omap-dwc3", .of_match_table = of_dwc3_matach, }, }; module_platform_driver(dwc3_omap_driver); MODULE_ALIAS("platform:omap-dwc3"); MODULE_AUTHOR("Felipe Balbi "); MODULE_LICENSE("Dual BSD/GPL"); MODULE_DESCRIPTION("DesignWare USB3 OMAP Glue Layer");