| /* |
| * platform.c - DesignWare HS OTG Controller platform driver |
| * |
| * Copyright (C) Matthijs Kooijman <matthijs@stdin.nl> |
| * |
| * 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") as published by the Free Software |
| * Foundation; either version 2 of the License, or (at your option) any |
| * later version. |
| * |
| * 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 <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/device.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/platform_device.h> |
| |
| #include "core.h" |
| #include "hcd.h" |
| |
| static const char dwc2_driver_name[] = "dwc2"; |
| |
| /** |
| * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the |
| * DWC_otg driver |
| * |
| * @dev: Platform device |
| * |
| * This routine is called, for example, when the rmmod command is executed. The |
| * device may or may not be electrically present. If it is present, the driver |
| * stops device processing. Any resources used on behalf of this device are |
| * freed. |
| */ |
| static int dwc2_driver_remove(struct platform_device *dev) |
| { |
| struct dwc2_hsotg *hsotg = platform_get_drvdata(dev); |
| |
| dwc2_hcd_remove(hsotg); |
| |
| return 0; |
| } |
| |
| /** |
| * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg |
| * driver |
| * |
| * @dev: Platform device |
| * |
| * This routine creates the driver components required to control the device |
| * (core, HCD, and PCD) and initializes the device. The driver components are |
| * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved |
| * in the device private data. This allows the driver to access the dwc2_hsotg |
| * structure on subsequent calls to driver methods for this device. |
| */ |
| static int dwc2_driver_probe(struct platform_device *dev) |
| { |
| struct dwc2_hsotg *hsotg; |
| struct resource *res; |
| int retval; |
| int irq; |
| struct dwc2_core_params params; |
| |
| /* Default all params to autodetect */ |
| dwc2_set_all_params(¶ms, -1); |
| |
| hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL); |
| if (!hsotg) |
| return -ENOMEM; |
| |
| hsotg->dev = &dev->dev; |
| |
| /* |
| * Use reasonable defaults so platforms don't have to provide these. |
| */ |
| if (!dev->dev.dma_mask) |
| dev->dev.dma_mask = &dev->dev.coherent_dma_mask; |
| if (!dev->dev.coherent_dma_mask) |
| dev->dev.coherent_dma_mask = DMA_BIT_MASK(32); |
| |
| irq = platform_get_irq(dev, 0); |
| if (irq < 0) { |
| dev_err(&dev->dev, "missing IRQ resource\n"); |
| return -EINVAL; |
| } |
| |
| res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
| hsotg->regs = devm_ioremap_resource(&dev->dev, res); |
| if (IS_ERR(hsotg->regs)) |
| return PTR_ERR(hsotg->regs); |
| |
| dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n", |
| (unsigned long)res->start, hsotg->regs); |
| |
| retval = dwc2_hcd_init(hsotg, irq, ¶ms); |
| if (retval) |
| return retval; |
| |
| platform_set_drvdata(dev, hsotg); |
| |
| return retval; |
| } |
| |
| static const struct of_device_id dwc2_of_match_table[] = { |
| { .compatible = "snps,dwc2" }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(of, dwc2_of_match_table); |
| |
| static struct platform_driver dwc2_platform_driver = { |
| .driver = { |
| .name = (char *)dwc2_driver_name, |
| .of_match_table = dwc2_of_match_table, |
| }, |
| .probe = dwc2_driver_probe, |
| .remove = dwc2_driver_remove, |
| }; |
| |
| module_platform_driver(dwc2_platform_driver); |
| |
| MODULE_DESCRIPTION("DESIGNWARE HS OTG Platform Glue"); |
| MODULE_AUTHOR("Matthijs Kooijman <matthijs@stdin.nl>"); |
| MODULE_LICENSE("Dual BSD/GPL"); |