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

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