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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 #include "platform_data.h"
 29 
 30 /* FIXME define these in <linux/pci_ids.h> */
 31 #define PCI_VENDOR_ID_SYNOPSYS          0x16c3
 32 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
 33 #define PCI_DEVICE_ID_INTEL_BYT         0x0f37
 34 #define PCI_DEVICE_ID_INTEL_MRFLD       0x119e
 35 #define PCI_DEVICE_ID_INTEL_BSW         0x22B7
 36 #define PCI_DEVICE_ID_INTEL_SPTLP       0x9d30
 37 #define PCI_DEVICE_ID_INTEL_SPTH        0xa130
 38 
 39 struct dwc3_pci {
 40         struct device           *dev;
 41         struct platform_device  *dwc3;
 42         struct platform_device  *usb2_phy;
 43         struct platform_device  *usb3_phy;
 44 };
 45 
 46 static int dwc3_pci_register_phys(struct dwc3_pci *glue)
 47 {
 48         struct usb_phy_generic_platform_data pdata;
 49         struct platform_device  *pdev;
 50         int                     ret;
 51 
 52         memset(&pdata, 0x00, sizeof(pdata));
 53 
 54         pdev = platform_device_alloc("usb_phy_generic", 0);
 55         if (!pdev)
 56                 return -ENOMEM;
 57 
 58         glue->usb2_phy = pdev;
 59         pdata.type = USB_PHY_TYPE_USB2;
 60         pdata.gpio_reset = -1;
 61 
 62         ret = platform_device_add_data(glue->usb2_phy, &pdata, sizeof(pdata));
 63         if (ret)
 64                 goto err1;
 65 
 66         pdev = platform_device_alloc("usb_phy_generic", 1);
 67         if (!pdev) {
 68                 ret = -ENOMEM;
 69                 goto err1;
 70         }
 71 
 72         glue->usb3_phy = pdev;
 73         pdata.type = USB_PHY_TYPE_USB3;
 74 
 75         ret = platform_device_add_data(glue->usb3_phy, &pdata, sizeof(pdata));
 76         if (ret)
 77                 goto err2;
 78 
 79         ret = platform_device_add(glue->usb2_phy);
 80         if (ret)
 81                 goto err2;
 82 
 83         ret = platform_device_add(glue->usb3_phy);
 84         if (ret)
 85                 goto err3;
 86 
 87         return 0;
 88 
 89 err3:
 90         platform_device_del(glue->usb2_phy);
 91 
 92 err2:
 93         platform_device_put(glue->usb3_phy);
 94 
 95 err1:
 96         platform_device_put(glue->usb2_phy);
 97 
 98         return ret;
 99 }
100 
101 static int dwc3_pci_probe(struct pci_dev *pci,
102                 const struct pci_device_id *id)
103 {
104         struct resource         res[2];
105         struct platform_device  *dwc3;
106         struct dwc3_pci         *glue;
107         int                     ret;
108         struct device           *dev = &pci->dev;
109         struct dwc3_platform_data dwc3_pdata;
110 
111         memset(&dwc3_pdata, 0x00, sizeof(dwc3_pdata));
112 
113         glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
114         if (!glue)
115                 return -ENOMEM;
116 
117         glue->dev = dev;
118 
119         ret = pcim_enable_device(pci);
120         if (ret) {
121                 dev_err(dev, "failed to enable pci device\n");
122                 return -ENODEV;
123         }
124 
125         pci_set_master(pci);
126 
127         ret = dwc3_pci_register_phys(glue);
128         if (ret) {
129                 dev_err(dev, "couldn't register PHYs\n");
130                 return ret;
131         }
132 
133         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
134         if (!dwc3) {
135                 dev_err(dev, "couldn't allocate dwc3 device\n");
136                 return -ENOMEM;
137         }
138 
139         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
140 
141         res[0].start    = pci_resource_start(pci, 0);
142         res[0].end      = pci_resource_end(pci, 0);
143         res[0].name     = "dwc_usb3";
144         res[0].flags    = IORESOURCE_MEM;
145 
146         res[1].start    = pci->irq;
147         res[1].name     = "dwc_usb3";
148         res[1].flags    = IORESOURCE_IRQ;
149 
150         if (pci->vendor == PCI_VENDOR_ID_AMD &&
151                         pci->device == PCI_DEVICE_ID_AMD_NL_USB) {
152                 dwc3_pdata.has_lpm_erratum = true;
153                 dwc3_pdata.lpm_nyet_threshold = 0xf;
154 
155                 dwc3_pdata.u2exit_lfps_quirk = true;
156                 dwc3_pdata.u2ss_inp3_quirk = true;
157                 dwc3_pdata.req_p1p2p3_quirk = true;
158                 dwc3_pdata.del_p1p2p3_quirk = true;
159                 dwc3_pdata.del_phy_power_chg_quirk = true;
160                 dwc3_pdata.lfps_filter_quirk = true;
161                 dwc3_pdata.rx_detect_poll_quirk = true;
162 
163                 dwc3_pdata.tx_de_emphasis_quirk = true;
164                 dwc3_pdata.tx_de_emphasis = 1;
165 
166                 /*
167                  * FIXME these quirks should be removed when AMD NL
168                  * taps out
169                  */
170                 dwc3_pdata.disable_scramble_quirk = true;
171                 dwc3_pdata.dis_u3_susphy_quirk = true;
172                 dwc3_pdata.dis_u2_susphy_quirk = true;
173         }
174 
175         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
176         if (ret) {
177                 dev_err(dev, "couldn't add resources to dwc3 device\n");
178                 return ret;
179         }
180 
181         pci_set_drvdata(pci, glue);
182 
183         ret = platform_device_add_data(dwc3, &dwc3_pdata, sizeof(dwc3_pdata));
184         if (ret)
185                 goto err3;
186 
187         dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
188 
189         dwc3->dev.dma_mask = dev->dma_mask;
190         dwc3->dev.dma_parms = dev->dma_parms;
191         dwc3->dev.parent = dev;
192         glue->dwc3 = dwc3;
193 
194         ret = platform_device_add(dwc3);
195         if (ret) {
196                 dev_err(dev, "failed to register dwc3 device\n");
197                 goto err3;
198         }
199 
200         return 0;
201 
202 err3:
203         platform_device_put(dwc3);
204         return ret;
205 }
206 
207 static void dwc3_pci_remove(struct pci_dev *pci)
208 {
209         struct dwc3_pci *glue = pci_get_drvdata(pci);
210 
211         platform_device_unregister(glue->dwc3);
212         platform_device_unregister(glue->usb2_phy);
213         platform_device_unregister(glue->usb3_phy);
214 }
215 
216 static const struct pci_device_id dwc3_pci_id_table[] = {
217         {
218                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
219                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
220         },
221         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
222         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
223         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
224         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
225         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
226         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
227         {  }    /* Terminating Entry */
228 };
229 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
230 
231 #ifdef CONFIG_PM_SLEEP
232 static int dwc3_pci_suspend(struct device *dev)
233 {
234         struct pci_dev  *pci = to_pci_dev(dev);
235 
236         pci_disable_device(pci);
237 
238         return 0;
239 }
240 
241 static int dwc3_pci_resume(struct device *dev)
242 {
243         struct pci_dev  *pci = to_pci_dev(dev);
244         int             ret;
245 
246         ret = pci_enable_device(pci);
247         if (ret) {
248                 dev_err(dev, "can't re-enable device --> %d\n", ret);
249                 return ret;
250         }
251 
252         pci_set_master(pci);
253 
254         return 0;
255 }
256 #endif /* CONFIG_PM_SLEEP */
257 
258 static const struct dev_pm_ops dwc3_pci_dev_pm_ops = {
259         SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
260 };
261 
262 static struct pci_driver dwc3_pci_driver = {
263         .name           = "dwc3-pci",
264         .id_table       = dwc3_pci_id_table,
265         .probe          = dwc3_pci_probe,
266         .remove         = dwc3_pci_remove,
267         .driver         = {
268                 .pm     = &dwc3_pci_dev_pm_ops,
269         },
270 };
271 
272 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
273 MODULE_LICENSE("GPL v2");
274 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
275 
276 module_pci_driver(dwc3_pci_driver);
277 

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