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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 
 54 #include "core.h"
 55 #include "hcd.h"
 56 
 57 #define PCI_VENDOR_ID_SYNOPSYS          0x16c3
 58 #define PCI_PRODUCT_ID_HAPS_HSOTG       0xabc0
 59 
 60 static const char dwc2_driver_name[] = "dwc2";
 61 
 62 static const struct dwc2_core_params dwc2_module_params = {
 63         .otg_cap                        = -1,
 64         .otg_ver                        = -1,
 65         .dma_enable                     = -1,
 66         .dma_desc_enable                = 0,
 67         .speed                          = -1,
 68         .enable_dynamic_fifo            = -1,
 69         .en_multiple_tx_fifo            = -1,
 70         .host_rx_fifo_size              = 1024,
 71         .host_nperio_tx_fifo_size       = 256,
 72         .host_perio_tx_fifo_size        = 1024,
 73         .max_transfer_size              = 65535,
 74         .max_packet_count               = 511,
 75         .host_channels                  = -1,
 76         .phy_type                       = -1,
 77         .phy_utmi_width                 = -1,
 78         .phy_ulpi_ddr                   = -1,
 79         .phy_ulpi_ext_vbus              = -1,
 80         .i2c_enable                     = -1,
 81         .ulpi_fs_ls                     = -1,
 82         .host_support_fs_ls_low_power   = -1,
 83         .host_ls_low_power_phy_clk      = -1,
 84         .ts_dline                       = -1,
 85         .reload_ctl                     = -1,
 86         .ahbcfg                         = -1,
 87         .uframe_sched                   = -1,
 88 };
 89 
 90 /**
 91  * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
 92  * DWC_otg driver
 93  *
 94  * @dev: Bus device
 95  *
 96  * This routine is called, for example, when the rmmod command is executed. The
 97  * device may or may not be electrically present. If it is present, the driver
 98  * stops device processing. Any resources used on behalf of this device are
 99  * freed.
100  */
101 static void dwc2_driver_remove(struct pci_dev *dev)
102 {
103         struct dwc2_hsotg *hsotg = pci_get_drvdata(dev);
104 
105         dwc2_hcd_remove(hsotg);
106         pci_disable_device(dev);
107 }
108 
109 /**
110  * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
111  * driver
112  *
113  * @dev: Bus device
114  *
115  * This routine creates the driver components required to control the device
116  * (core, HCD, and PCD) and initializes the device. The driver components are
117  * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
118  * in the device private data. This allows the driver to access the dwc2_hsotg
119  * structure on subsequent calls to driver methods for this device.
120  */
121 static int dwc2_driver_probe(struct pci_dev *dev,
122                              const struct pci_device_id *id)
123 {
124         struct dwc2_hsotg *hsotg;
125         int retval;
126 
127         hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
128         if (!hsotg)
129                 return -ENOMEM;
130 
131         hsotg->dev = &dev->dev;
132         hsotg->regs = devm_ioremap_resource(&dev->dev, &dev->resource[0]);
133         if (IS_ERR(hsotg->regs))
134                 return PTR_ERR(hsotg->regs);
135 
136         dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
137                 (unsigned long)pci_resource_start(dev, 0), hsotg->regs);
138 
139         if (pci_enable_device(dev) < 0)
140                 return -ENODEV;
141 
142         pci_set_master(dev);
143 
144         retval = dwc2_hcd_init(hsotg, dev->irq, &dwc2_module_params);
145         if (retval) {
146                 pci_disable_device(dev);
147                 return retval;
148         }
149 
150         pci_set_drvdata(dev, hsotg);
151 
152         return retval;
153 }
154 
155 static const struct pci_device_id dwc2_pci_ids[] = {
156         {
157                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG),
158         },
159         {
160                 PCI_DEVICE(PCI_VENDOR_ID_STMICRO,
161                            PCI_DEVICE_ID_STMICRO_USB_OTG),
162         },
163         { /* end: all zeroes */ }
164 };
165 MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
166 
167 static struct pci_driver dwc2_pci_driver = {
168         .name = dwc2_driver_name,
169         .id_table = dwc2_pci_ids,
170         .probe = dwc2_driver_probe,
171         .remove = dwc2_driver_remove,
172 };
173 
174 module_pci_driver(dwc2_pci_driver);
175 
176 MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
177 MODULE_AUTHOR("Synopsys, Inc.");
178 MODULE_LICENSE("Dual BSD/GPL");
179 

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