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_PRODUCT_ID_HAPS_HSOTG 0xabc0 58 59 static const char dwc2_driver_name[] = "dwc2"; 60 61 static const struct dwc2_core_params dwc2_module_params = { 62 .otg_cap = -1, 63 .otg_ver = -1, 64 .dma_enable = -1, 65 .dma_desc_enable = 0, 66 .speed = -1, 67 .enable_dynamic_fifo = -1, 68 .en_multiple_tx_fifo = -1, 69 .host_rx_fifo_size = 1024, 70 .host_nperio_tx_fifo_size = 256, 71 .host_perio_tx_fifo_size = 1024, 72 .max_transfer_size = 65535, 73 .max_packet_count = 511, 74 .host_channels = -1, 75 .phy_type = -1, 76 .phy_utmi_width = -1, 77 .phy_ulpi_ddr = -1, 78 .phy_ulpi_ext_vbus = -1, 79 .i2c_enable = -1, 80 .ulpi_fs_ls = -1, 81 .host_support_fs_ls_low_power = -1, 82 .host_ls_low_power_phy_clk = -1, 83 .ts_dline = -1, 84 .reload_ctl = -1, 85 .ahbcfg = -1, 86 .uframe_sched = -1, 87 }; 88 89 /** 90 * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the 91 * DWC_otg driver 92 * 93 * @dev: Bus device 94 * 95 * This routine is called, for example, when the rmmod command is executed. The 96 * device may or may not be electrically present. If it is present, the driver 97 * stops device processing. Any resources used on behalf of this device are 98 * freed. 99 */ 100 static void dwc2_driver_remove(struct pci_dev *dev) 101 { 102 struct dwc2_hsotg *hsotg = pci_get_drvdata(dev); 103 104 dwc2_hcd_remove(hsotg); 105 pci_disable_device(dev); 106 } 107 108 /** 109 * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg 110 * driver 111 * 112 * @dev: Bus device 113 * 114 * This routine creates the driver components required to control the device 115 * (core, HCD, and PCD) and initializes the device. The driver components are 116 * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved 117 * in the device private data. This allows the driver to access the dwc2_hsotg 118 * structure on subsequent calls to driver methods for this device. 119 */ 120 static int dwc2_driver_probe(struct pci_dev *dev, 121 const struct pci_device_id *id) 122 { 123 struct dwc2_hsotg *hsotg; 124 int retval; 125 126 hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL); 127 if (!hsotg) 128 return -ENOMEM; 129 130 hsotg->dev = &dev->dev; 131 hsotg->regs = devm_ioremap_resource(&dev->dev, &dev->resource[0]); 132 if (IS_ERR(hsotg->regs)) 133 return PTR_ERR(hsotg->regs); 134 135 dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n", 136 (unsigned long)pci_resource_start(dev, 0), hsotg->regs); 137 138 if (pci_enable_device(dev) < 0) 139 return -ENODEV; 140 141 pci_set_master(dev); 142 143 retval = devm_request_irq(hsotg->dev, dev->irq, 144 dwc2_handle_common_intr, IRQF_SHARED, 145 dev_name(hsotg->dev), hsotg); 146 if (retval) 147 return retval; 148 149 spin_lock_init(&hsotg->lock); 150 retval = dwc2_hcd_init(hsotg, dev->irq, &dwc2_module_params); 151 if (retval) { 152 pci_disable_device(dev); 153 return retval; 154 } 155 156 pci_set_drvdata(dev, hsotg); 157 158 return retval; 159 } 160 161 static const struct pci_device_id dwc2_pci_ids[] = { 162 { 163 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG), 164 }, 165 { 166 PCI_DEVICE(PCI_VENDOR_ID_STMICRO, 167 PCI_DEVICE_ID_STMICRO_USB_OTG), 168 }, 169 { /* end: all zeroes */ } 170 }; 171 MODULE_DEVICE_TABLE(pci, dwc2_pci_ids); 172 173 static struct pci_driver dwc2_pci_driver = { 174 .name = dwc2_driver_name, 175 .id_table = dwc2_pci_ids, 176 .probe = dwc2_driver_probe, 177 .remove = dwc2_driver_remove, 178 }; 179 180 module_pci_driver(dwc2_pci_driver); 181 182 MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue"); 183 MODULE_AUTHOR("Synopsys, Inc."); 184 MODULE_LICENSE("Dual BSD/GPL"); 185