Matthijs Kooijman | 5b9974b | 2013-04-22 14:00:19 -0700 | [diff] [blame] | 1 | /* |
| 2 | * platform.c - DesignWare HS OTG Controller platform driver |
| 3 | * |
| 4 | * Copyright (C) Matthijs Kooijman <matthijs@stdin.nl> |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions, and the following disclaimer, |
| 11 | * without modification. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. The names of the above-listed copyright holders may not be used |
| 16 | * to endorse or promote products derived from this software without |
| 17 | * specific prior written permission. |
| 18 | * |
| 19 | * ALTERNATIVELY, this software may be distributed under the terms of the |
| 20 | * GNU General Public License ("GPL") as published by the Free Software |
| 21 | * Foundation; either version 2 of the License, or (at your option) any |
| 22 | * later version. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| 25 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 26 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 27 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 28 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 29 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 30 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 31 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 32 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 33 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 34 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 35 | */ |
| 36 | |
| 37 | #include <linux/kernel.h> |
| 38 | #include <linux/module.h> |
| 39 | #include <linux/slab.h> |
| 40 | #include <linux/device.h> |
| 41 | #include <linux/dma-mapping.h> |
| 42 | #include <linux/platform_device.h> |
| 43 | |
| 44 | #include "core.h" |
| 45 | #include "hcd.h" |
| 46 | |
| 47 | static const char dwc2_driver_name[] = "dwc2"; |
| 48 | |
| 49 | /** |
| 50 | * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the |
| 51 | * DWC_otg driver |
| 52 | * |
| 53 | * @dev: Platform device |
| 54 | * |
| 55 | * This routine is called, for example, when the rmmod command is executed. The |
| 56 | * device may or may not be electrically present. If it is present, the driver |
| 57 | * stops device processing. Any resources used on behalf of this device are |
| 58 | * freed. |
| 59 | */ |
| 60 | static int dwc2_driver_remove(struct platform_device *dev) |
| 61 | { |
| 62 | struct dwc2_hsotg *hsotg = platform_get_drvdata(dev); |
| 63 | |
| 64 | dwc2_hcd_remove(hsotg); |
| 65 | |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg |
| 71 | * driver |
| 72 | * |
| 73 | * @dev: Platform device |
| 74 | * |
| 75 | * This routine creates the driver components required to control the device |
| 76 | * (core, HCD, and PCD) and initializes the device. The driver components are |
| 77 | * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved |
| 78 | * in the device private data. This allows the driver to access the dwc2_hsotg |
| 79 | * structure on subsequent calls to driver methods for this device. |
| 80 | */ |
| 81 | static int dwc2_driver_probe(struct platform_device *dev) |
| 82 | { |
| 83 | struct dwc2_hsotg *hsotg; |
| 84 | struct resource *res; |
| 85 | int retval; |
| 86 | int irq; |
| 87 | struct dwc2_core_params params; |
| 88 | |
| 89 | /* Default all params to autodetect */ |
| 90 | dwc2_set_all_params(¶ms, -1); |
| 91 | |
| 92 | hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL); |
| 93 | if (!hsotg) |
| 94 | return -ENOMEM; |
| 95 | |
| 96 | hsotg->dev = &dev->dev; |
| 97 | |
Matthijs Kooijman | 642f2ec | 2013-05-17 10:52:55 +0200 | [diff] [blame] | 98 | /* |
| 99 | * Use reasonable defaults so platforms don't have to provide these. |
| 100 | */ |
| 101 | if (!dev->dev.dma_mask) |
| 102 | dev->dev.dma_mask = &dev->dev.coherent_dma_mask; |
| 103 | if (!dev->dev.coherent_dma_mask) |
| 104 | dev->dev.coherent_dma_mask = DMA_BIT_MASK(32); |
| 105 | |
Matthijs Kooijman | 5b9974b | 2013-04-22 14:00:19 -0700 | [diff] [blame] | 106 | irq = platform_get_irq(dev, 0); |
| 107 | if (irq < 0) { |
| 108 | dev_err(&dev->dev, "missing IRQ resource\n"); |
Rashika Kheria | 097f261 | 2013-10-26 23:12:19 +0530 | [diff] [blame] | 109 | return irq; |
Matthijs Kooijman | 5b9974b | 2013-04-22 14:00:19 -0700 | [diff] [blame] | 110 | } |
| 111 | |
| 112 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
Matthijs Kooijman | 5b9974b | 2013-04-22 14:00:19 -0700 | [diff] [blame] | 113 | hsotg->regs = devm_ioremap_resource(&dev->dev, res); |
| 114 | if (IS_ERR(hsotg->regs)) |
| 115 | return PTR_ERR(hsotg->regs); |
| 116 | |
| 117 | dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n", |
| 118 | (unsigned long)res->start, hsotg->regs); |
| 119 | |
| 120 | retval = dwc2_hcd_init(hsotg, irq, ¶ms); |
| 121 | if (retval) |
| 122 | return retval; |
| 123 | |
| 124 | platform_set_drvdata(dev, hsotg); |
| 125 | |
| 126 | return retval; |
| 127 | } |
| 128 | |
| 129 | static const struct of_device_id dwc2_of_match_table[] = { |
| 130 | { .compatible = "snps,dwc2" }, |
| 131 | {}, |
| 132 | }; |
| 133 | MODULE_DEVICE_TABLE(of, dwc2_of_match_table); |
| 134 | |
| 135 | static struct platform_driver dwc2_platform_driver = { |
| 136 | .driver = { |
Geert Uytterhoeven | 1c126bc | 2013-11-12 20:07:19 +0100 | [diff] [blame^] | 137 | .name = dwc2_driver_name, |
Matthijs Kooijman | 5b9974b | 2013-04-22 14:00:19 -0700 | [diff] [blame] | 138 | .of_match_table = dwc2_of_match_table, |
| 139 | }, |
| 140 | .probe = dwc2_driver_probe, |
| 141 | .remove = dwc2_driver_remove, |
| 142 | }; |
| 143 | |
| 144 | module_platform_driver(dwc2_platform_driver); |
| 145 | |
| 146 | MODULE_DESCRIPTION("DESIGNWARE HS OTG Platform Glue"); |
| 147 | MODULE_AUTHOR("Matthijs Kooijman <matthijs@stdin.nl>"); |
| 148 | MODULE_LICENSE("Dual BSD/GPL"); |