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Linux/drivers/usb/dwc2/pci.c

  1 /*
  2  * pci.c - DesignWare HS OTG Controller PCI driver
  3  *
  4  * Copyright (C) 2004-2013 Synopsys, Inc.
  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 /*
 38  * Provides the initialization and cleanup entry points for the DWC_otg PCI
 39  * driver
 40  */
 41 #include <linux/kernel.h>
 42 #include <linux/module.h>
 43 #include <linux/moduleparam.h>
 44 #include <linux/spinlock.h>
 45 #include <linux/interrupt.h>
 46 #include <linux/io.h>
 47 #include <linux/slab.h>
 48 #include <linux/pci.h>
 49 #include <linux/usb.h>
 50 
 51 #include <linux/usb/hcd.h>
 52 #include <linux/usb/ch11.h>
 53 #include <linux/platform_device.h>
 54 #include <linux/usb/usb_phy_generic.h>
 55 
 56 #define PCI_PRODUCT_ID_HAPS_HSOTG       0xabc0
 57 
 58 static const char dwc2_driver_name[] = "dwc2-pci";
 59 
 60 struct dwc2_pci_glue {
 61         struct platform_device *dwc2;
 62         struct platform_device *phy;
 63 };
 64 
 65 static int dwc2_pci_quirks(struct pci_dev *pdev, struct platform_device *dwc2)
 66 {
 67         if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
 68             pdev->device == PCI_PRODUCT_ID_HAPS_HSOTG) {
 69                 struct property_entry properties[] = {
 70                         { },
 71                 };
 72 
 73                 return platform_device_add_properties(dwc2, properties);
 74         }
 75 
 76         return 0;
 77 }
 78 
 79 static void dwc2_pci_remove(struct pci_dev *pci)
 80 {
 81         struct dwc2_pci_glue *glue = pci_get_drvdata(pci);
 82 
 83         platform_device_unregister(glue->dwc2);
 84         usb_phy_generic_unregister(glue->phy);
 85         kfree(glue);
 86         pci_set_drvdata(pci, NULL);
 87 }
 88 
 89 static int dwc2_pci_probe(struct pci_dev *pci,
 90                 const struct pci_device_id *id)
 91 {
 92         struct resource         res[2];
 93         struct platform_device  *dwc2;
 94         struct platform_device  *phy;
 95         int                     ret;
 96         struct device           *dev = &pci->dev;
 97         struct dwc2_pci_glue    *glue;
 98 
 99         ret = pcim_enable_device(pci);
100         if (ret) {
101                 dev_err(dev, "failed to enable pci device\n");
102                 return -ENODEV;
103         }
104 
105         pci_set_master(pci);
106 
107         dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO);
108         if (!dwc2) {
109                 dev_err(dev, "couldn't allocate dwc2 device\n");
110                 return -ENOMEM;
111         }
112 
113         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
114 
115         res[0].start    = pci_resource_start(pci, 0);
116         res[0].end      = pci_resource_end(pci, 0);
117         res[0].name     = "dwc2";
118         res[0].flags    = IORESOURCE_MEM;
119 
120         res[1].start    = pci->irq;
121         res[1].name     = "dwc2";
122         res[1].flags    = IORESOURCE_IRQ;
123 
124         ret = platform_device_add_resources(dwc2, res, ARRAY_SIZE(res));
125         if (ret) {
126                 dev_err(dev, "couldn't add resources to dwc2 device\n");
127                 return ret;
128         }
129 
130         dwc2->dev.parent = dev;
131 
132         phy = usb_phy_generic_register();
133         if (IS_ERR(phy)) {
134                 dev_err(dev, "error registering generic PHY (%ld)\n",
135                         PTR_ERR(phy));
136                 return PTR_ERR(phy);
137         }
138 
139         ret = dwc2_pci_quirks(pci, dwc2);
140         if (ret)
141                 goto err;
142 
143         ret = platform_device_add(dwc2);
144         if (ret) {
145                 dev_err(dev, "failed to register dwc2 device\n");
146                 goto err;
147         }
148 
149         glue = kzalloc(sizeof(*glue), GFP_KERNEL);
150         if (!glue)
151                 return -ENOMEM;
152 
153         glue->phy = phy;
154         glue->dwc2 = dwc2;
155         pci_set_drvdata(pci, glue);
156 
157         return 0;
158 err:
159         usb_phy_generic_unregister(phy);
160         platform_device_put(dwc2);
161         return ret;
162 }
163 
164 static const struct pci_device_id dwc2_pci_ids[] = {
165         {
166                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG),
167         },
168         {
169                 PCI_DEVICE(PCI_VENDOR_ID_STMICRO,
170                            PCI_DEVICE_ID_STMICRO_USB_OTG),
171         },
172         { /* end: all zeroes */ }
173 };
174 MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
175 
176 static struct pci_driver dwc2_pci_driver = {
177         .name = dwc2_driver_name,
178         .id_table = dwc2_pci_ids,
179         .probe = dwc2_pci_probe,
180         .remove = dwc2_pci_remove,
181 };
182 
183 module_pci_driver(dwc2_pci_driver);
184 
185 MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
186 MODULE_AUTHOR("Synopsys, Inc.");
187 MODULE_LICENSE("Dual BSD/GPL");
188 

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