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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 "platform_data.h"
 26 
 27 /* FIXME define these in <linux/pci_ids.h> */
 28 #define PCI_VENDOR_ID_SYNOPSYS          0x16c3
 29 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
 30 #define PCI_DEVICE_ID_INTEL_BYT         0x0f37
 31 #define PCI_DEVICE_ID_INTEL_MRFLD       0x119e
 32 #define PCI_DEVICE_ID_INTEL_BSW         0x22B7
 33 #define PCI_DEVICE_ID_INTEL_SPTLP       0x9d30
 34 #define PCI_DEVICE_ID_INTEL_SPTH        0xa130
 35 
 36 static int dwc3_pci_quirks(struct pci_dev *pdev)
 37 {
 38         if (pdev->vendor == PCI_VENDOR_ID_AMD &&
 39             pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
 40                 struct dwc3_platform_data pdata;
 41 
 42                 memset(&pdata, 0, sizeof(pdata));
 43 
 44                 pdata.has_lpm_erratum = true;
 45                 pdata.lpm_nyet_threshold = 0xf;
 46 
 47                 pdata.u2exit_lfps_quirk = true;
 48                 pdata.u2ss_inp3_quirk = true;
 49                 pdata.req_p1p2p3_quirk = true;
 50                 pdata.del_p1p2p3_quirk = true;
 51                 pdata.del_phy_power_chg_quirk = true;
 52                 pdata.lfps_filter_quirk = true;
 53                 pdata.rx_detect_poll_quirk = true;
 54 
 55                 pdata.tx_de_emphasis_quirk = true;
 56                 pdata.tx_de_emphasis = 1;
 57 
 58                 /*
 59                  * FIXME these quirks should be removed when AMD NL
 60                  * taps out
 61                  */
 62                 pdata.disable_scramble_quirk = true;
 63                 pdata.dis_u3_susphy_quirk = true;
 64                 pdata.dis_u2_susphy_quirk = true;
 65 
 66                 return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
 67                                                 sizeof(pdata));
 68         }
 69 
 70         return 0;
 71 }
 72 
 73 static int dwc3_pci_probe(struct pci_dev *pci,
 74                 const struct pci_device_id *id)
 75 {
 76         struct resource         res[2];
 77         struct platform_device  *dwc3;
 78         int                     ret;
 79         struct device           *dev = &pci->dev;
 80 
 81         ret = pcim_enable_device(pci);
 82         if (ret) {
 83                 dev_err(dev, "failed to enable pci device\n");
 84                 return -ENODEV;
 85         }
 86 
 87         pci_set_master(pci);
 88 
 89         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
 90         if (!dwc3) {
 91                 dev_err(dev, "couldn't allocate dwc3 device\n");
 92                 return -ENOMEM;
 93         }
 94 
 95         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 96 
 97         res[0].start    = pci_resource_start(pci, 0);
 98         res[0].end      = pci_resource_end(pci, 0);
 99         res[0].name     = "dwc_usb3";
100         res[0].flags    = IORESOURCE_MEM;
101 
102         res[1].start    = pci->irq;
103         res[1].name     = "dwc_usb3";
104         res[1].flags    = IORESOURCE_IRQ;
105 
106         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
107         if (ret) {
108                 dev_err(dev, "couldn't add resources to dwc3 device\n");
109                 return ret;
110         }
111 
112         pci_set_drvdata(pci, dwc3);
113         ret = dwc3_pci_quirks(pci);
114         if (ret)
115                 goto err;
116 
117         dwc3->dev.parent = dev;
118 
119         ret = platform_device_add(dwc3);
120         if (ret) {
121                 dev_err(dev, "failed to register dwc3 device\n");
122                 goto err;
123         }
124 
125         return 0;
126 err:
127         platform_device_put(dwc3);
128         return ret;
129 }
130 
131 static void dwc3_pci_remove(struct pci_dev *pci)
132 {
133         platform_device_unregister(pci_get_drvdata(pci));
134 }
135 
136 static const struct pci_device_id dwc3_pci_id_table[] = {
137         {
138                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
139                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
140         },
141         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
142         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
143         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
144         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
145         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
146         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
147         {  }    /* Terminating Entry */
148 };
149 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
150 
151 static struct pci_driver dwc3_pci_driver = {
152         .name           = "dwc3-pci",
153         .id_table       = dwc3_pci_id_table,
154         .probe          = dwc3_pci_probe,
155         .remove         = dwc3_pci_remove,
156 };
157 
158 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
159 MODULE_LICENSE("GPL v2");
160 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
161 
162 module_pci_driver(dwc3_pci_driver);
163 

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