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Linux/drivers/usb/dwc3/dwc3-pci.c

  1 /**
  2  * dwc3-pci.c - PCI Specific glue layer
  3  *
  4  * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
  5  *
  6  * Authors: Felipe Balbi <balbi@ti.com>,
  7  *          Sebastian Andrzej Siewior <bigeasy@linutronix.de>
  8  *
  9  * This program is free software: you can redistribute it and/or modify
 10  * it under the terms of the GNU General Public License version 2  of
 11  * the License as published by the Free Software Foundation.
 12  *
 13  * This program is distributed in the hope that it will be useful,
 14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 16  * GNU General Public License for more details.
 17  */
 18 
 19 #include <linux/kernel.h>
 20 #include <linux/module.h>
 21 #include <linux/slab.h>
 22 #include <linux/pci.h>
 23 #include <linux/platform_device.h>
 24 
 25 #include <linux/usb/otg.h>
 26 #include <linux/usb/usb_phy_generic.h>
 27 
 28 /* FIXME define these in <linux/pci_ids.h> */
 29 #define PCI_VENDOR_ID_SYNOPSYS          0x16c3
 30 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
 31 #define PCI_DEVICE_ID_INTEL_BYT         0x0f37
 32 #define PCI_DEVICE_ID_INTEL_MRFLD       0x119e
 33 #define PCI_DEVICE_ID_INTEL_BSW         0x22B7
 34 
 35 struct dwc3_pci {
 36         struct device           *dev;
 37         struct platform_device  *dwc3;
 38         struct platform_device  *usb2_phy;
 39         struct platform_device  *usb3_phy;
 40 };
 41 
 42 static int dwc3_pci_register_phys(struct dwc3_pci *glue)
 43 {
 44         struct usb_phy_generic_platform_data pdata;
 45         struct platform_device  *pdev;
 46         int                     ret;
 47 
 48         memset(&pdata, 0x00, sizeof(pdata));
 49 
 50         pdev = platform_device_alloc("usb_phy_generic", 0);
 51         if (!pdev)
 52                 return -ENOMEM;
 53 
 54         glue->usb2_phy = pdev;
 55         pdata.type = USB_PHY_TYPE_USB2;
 56         pdata.gpio_reset = -1;
 57 
 58         ret = platform_device_add_data(glue->usb2_phy, &pdata, sizeof(pdata));
 59         if (ret)
 60                 goto err1;
 61 
 62         pdev = platform_device_alloc("usb_phy_generic", 1);
 63         if (!pdev) {
 64                 ret = -ENOMEM;
 65                 goto err1;
 66         }
 67 
 68         glue->usb3_phy = pdev;
 69         pdata.type = USB_PHY_TYPE_USB3;
 70 
 71         ret = platform_device_add_data(glue->usb3_phy, &pdata, sizeof(pdata));
 72         if (ret)
 73                 goto err2;
 74 
 75         ret = platform_device_add(glue->usb2_phy);
 76         if (ret)
 77                 goto err2;
 78 
 79         ret = platform_device_add(glue->usb3_phy);
 80         if (ret)
 81                 goto err3;
 82 
 83         return 0;
 84 
 85 err3:
 86         platform_device_del(glue->usb2_phy);
 87 
 88 err2:
 89         platform_device_put(glue->usb3_phy);
 90 
 91 err1:
 92         platform_device_put(glue->usb2_phy);
 93 
 94         return ret;
 95 }
 96 
 97 static int dwc3_pci_probe(struct pci_dev *pci,
 98                 const struct pci_device_id *id)
 99 {
100         struct resource         res[2];
101         struct platform_device  *dwc3;
102         struct dwc3_pci         *glue;
103         int                     ret;
104         struct device           *dev = &pci->dev;
105 
106         glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
107         if (!glue)
108                 return -ENOMEM;
109 
110         glue->dev = dev;
111 
112         ret = pcim_enable_device(pci);
113         if (ret) {
114                 dev_err(dev, "failed to enable pci device\n");
115                 return -ENODEV;
116         }
117 
118         pci_set_master(pci);
119 
120         ret = dwc3_pci_register_phys(glue);
121         if (ret) {
122                 dev_err(dev, "couldn't register PHYs\n");
123                 return ret;
124         }
125 
126         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
127         if (!dwc3) {
128                 dev_err(dev, "couldn't allocate dwc3 device\n");
129                 return -ENOMEM;
130         }
131 
132         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
133 
134         res[0].start    = pci_resource_start(pci, 0);
135         res[0].end      = pci_resource_end(pci, 0);
136         res[0].name     = "dwc_usb3";
137         res[0].flags    = IORESOURCE_MEM;
138 
139         res[1].start    = pci->irq;
140         res[1].name     = "dwc_usb3";
141         res[1].flags    = IORESOURCE_IRQ;
142 
143         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
144         if (ret) {
145                 dev_err(dev, "couldn't add resources to dwc3 device\n");
146                 return ret;
147         }
148 
149         pci_set_drvdata(pci, glue);
150 
151         dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
152 
153         dwc3->dev.dma_mask = dev->dma_mask;
154         dwc3->dev.dma_parms = dev->dma_parms;
155         dwc3->dev.parent = dev;
156         glue->dwc3 = dwc3;
157 
158         ret = platform_device_add(dwc3);
159         if (ret) {
160                 dev_err(dev, "failed to register dwc3 device\n");
161                 goto err3;
162         }
163 
164         return 0;
165 
166 err3:
167         platform_device_put(dwc3);
168         return ret;
169 }
170 
171 static void dwc3_pci_remove(struct pci_dev *pci)
172 {
173         struct dwc3_pci *glue = pci_get_drvdata(pci);
174 
175         platform_device_unregister(glue->dwc3);
176         platform_device_unregister(glue->usb2_phy);
177         platform_device_unregister(glue->usb3_phy);
178 }
179 
180 static const struct pci_device_id dwc3_pci_id_table[] = {
181         {
182                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
183                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
184         },
185         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
186         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
187         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
188         {  }    /* Terminating Entry */
189 };
190 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
191 
192 #ifdef CONFIG_PM_SLEEP
193 static int dwc3_pci_suspend(struct device *dev)
194 {
195         struct pci_dev  *pci = to_pci_dev(dev);
196 
197         pci_disable_device(pci);
198 
199         return 0;
200 }
201 
202 static int dwc3_pci_resume(struct device *dev)
203 {
204         struct pci_dev  *pci = to_pci_dev(dev);
205         int             ret;
206 
207         ret = pci_enable_device(pci);
208         if (ret) {
209                 dev_err(dev, "can't re-enable device --> %d\n", ret);
210                 return ret;
211         }
212 
213         pci_set_master(pci);
214 
215         return 0;
216 }
217 #endif /* CONFIG_PM_SLEEP */
218 
219 static const struct dev_pm_ops dwc3_pci_dev_pm_ops = {
220         SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
221 };
222 
223 static struct pci_driver dwc3_pci_driver = {
224         .name           = "dwc3-pci",
225         .id_table       = dwc3_pci_id_table,
226         .probe          = dwc3_pci_probe,
227         .remove         = dwc3_pci_remove,
228         .driver         = {
229                 .pm     = &dwc3_pci_dev_pm_ops,
230         },
231 };
232 
233 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
234 MODULE_LICENSE("GPL v2");
235 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
236 
237 module_pci_driver(dwc3_pci_driver);
238 

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