1 /************************************************************************ 2 * Copyright 2003 Digi International (www.digi.com) 3 * 4 * Copyright (C) 2004 IBM Corporation. All rights reserved. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2, or (at your option) 9 * any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the 13 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 14 * PURPOSE. See the GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 * Temple Place - Suite 330, Boston, 19 * MA 02111-1307, USA. 20 * 21 * Contact Information: 22 * Scott H Kilau <Scott_Kilau@digi.com> 23 * Wendy Xiong <wendyx@us.ibm.com> 24 * 25 * 26 ***********************************************************************/ 27 #include <linux/module.h> 28 #include <linux/pci.h> 29 #include <linux/slab.h> 30 31 #include "jsm.h" 32 33 MODULE_AUTHOR("Digi International, http://www.digi.com"); 34 MODULE_DESCRIPTION("Driver for the Digi International " 35 "Neo PCI based product line"); 36 MODULE_LICENSE("GPL"); 37 MODULE_SUPPORTED_DEVICE("jsm"); 38 39 #define JSM_DRIVER_NAME "jsm" 40 #define NR_PORTS 32 41 #define JSM_MINOR_START 0 42 43 struct uart_driver jsm_uart_driver = { 44 .owner = THIS_MODULE, 45 .driver_name = JSM_DRIVER_NAME, 46 .dev_name = "ttyn", 47 .major = 0, 48 .minor = JSM_MINOR_START, 49 .nr = NR_PORTS, 50 }; 51 52 static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev, 53 pci_channel_state_t state); 54 static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev); 55 static void jsm_io_resume(struct pci_dev *pdev); 56 57 static const struct pci_error_handlers jsm_err_handler = { 58 .error_detected = jsm_io_error_detected, 59 .slot_reset = jsm_io_slot_reset, 60 .resume = jsm_io_resume, 61 }; 62 63 int jsm_debug; 64 module_param(jsm_debug, int, 0); 65 MODULE_PARM_DESC(jsm_debug, "Driver debugging level"); 66 67 static int jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent) 68 { 69 int rc = 0; 70 struct jsm_board *brd; 71 static int adapter_count = 0; 72 73 rc = pci_enable_device(pdev); 74 if (rc) { 75 dev_err(&pdev->dev, "Device enable FAILED\n"); 76 goto out; 77 } 78 79 rc = pci_request_regions(pdev, "jsm"); 80 if (rc) { 81 dev_err(&pdev->dev, "pci_request_region FAILED\n"); 82 goto out_disable_device; 83 } 84 85 brd = kzalloc(sizeof(struct jsm_board), GFP_KERNEL); 86 if (!brd) { 87 dev_err(&pdev->dev, 88 "memory allocation for board structure failed\n"); 89 rc = -ENOMEM; 90 goto out_release_regions; 91 } 92 93 /* store the info for the board we've found */ 94 brd->boardnum = adapter_count++; 95 brd->pci_dev = pdev; 96 if (pdev->device == PCIE_DEVICE_ID_NEO_4_IBM) 97 brd->maxports = 4; 98 else if (pdev->device == PCI_DEVICE_ID_DIGI_NEO_8) 99 brd->maxports = 8; 100 else 101 brd->maxports = 2; 102 103 spin_lock_init(&brd->bd_intr_lock); 104 105 /* store which revision we have */ 106 brd->rev = pdev->revision; 107 108 brd->irq = pdev->irq; 109 110 jsm_dbg(INIT, &brd->pci_dev, "jsm_found_board - NEO adapter\n"); 111 112 /* get the PCI Base Address Registers */ 113 brd->membase = pci_resource_start(pdev, 0); 114 brd->membase_end = pci_resource_end(pdev, 0); 115 116 if (brd->membase & 1) 117 brd->membase &= ~3; 118 else 119 brd->membase &= ~15; 120 121 /* Assign the board_ops struct */ 122 brd->bd_ops = &jsm_neo_ops; 123 124 brd->bd_uart_offset = 0x200; 125 brd->bd_dividend = 921600; 126 127 brd->re_map_membase = ioremap(brd->membase, pci_resource_len(pdev, 0)); 128 if (!brd->re_map_membase) { 129 dev_err(&pdev->dev, 130 "card has no PCI Memory resources, " 131 "failing board.\n"); 132 rc = -ENOMEM; 133 goto out_kfree_brd; 134 } 135 136 rc = request_irq(brd->irq, brd->bd_ops->intr, 137 IRQF_SHARED, "JSM", brd); 138 if (rc) { 139 printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq); 140 goto out_iounmap; 141 } 142 143 rc = jsm_tty_init(brd); 144 if (rc < 0) { 145 dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc); 146 rc = -ENXIO; 147 goto out_free_irq; 148 } 149 150 rc = jsm_uart_port_init(brd); 151 if (rc < 0) { 152 /* XXX: leaking all resources from jsm_tty_init here! */ 153 dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc); 154 rc = -ENXIO; 155 goto out_free_irq; 156 } 157 158 /* Log the information about the board */ 159 dev_info(&pdev->dev, "board %d: Digi Neo (rev %d), irq %d\n", 160 adapter_count, brd->rev, brd->irq); 161 162 pci_set_drvdata(pdev, brd); 163 pci_save_state(pdev); 164 165 return 0; 166 out_free_irq: 167 jsm_remove_uart_port(brd); 168 free_irq(brd->irq, brd); 169 out_iounmap: 170 iounmap(brd->re_map_membase); 171 out_kfree_brd: 172 kfree(brd); 173 out_release_regions: 174 pci_release_regions(pdev); 175 out_disable_device: 176 pci_disable_device(pdev); 177 out: 178 return rc; 179 } 180 181 static void jsm_remove_one(struct pci_dev *pdev) 182 { 183 struct jsm_board *brd = pci_get_drvdata(pdev); 184 int i = 0; 185 186 jsm_remove_uart_port(brd); 187 188 free_irq(brd->irq, brd); 189 iounmap(brd->re_map_membase); 190 191 /* Free all allocated channels structs */ 192 for (i = 0; i < brd->maxports; i++) { 193 if (brd->channels[i]) { 194 kfree(brd->channels[i]->ch_rqueue); 195 kfree(brd->channels[i]->ch_equeue); 196 kfree(brd->channels[i]); 197 } 198 } 199 200 pci_release_regions(pdev); 201 pci_disable_device(pdev); 202 kfree(brd); 203 } 204 205 static struct pci_device_id jsm_pci_tbl[] = { 206 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 }, 207 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 }, 208 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 }, 209 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 }, 210 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4_IBM), 0, 0, 4 }, 211 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_NEO_8), 0, 0, 5 }, 212 { 0, } 213 }; 214 MODULE_DEVICE_TABLE(pci, jsm_pci_tbl); 215 216 static struct pci_driver jsm_driver = { 217 .name = "jsm", 218 .id_table = jsm_pci_tbl, 219 .probe = jsm_probe_one, 220 .remove = jsm_remove_one, 221 .err_handler = &jsm_err_handler, 222 }; 223 224 static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev, 225 pci_channel_state_t state) 226 { 227 struct jsm_board *brd = pci_get_drvdata(pdev); 228 229 jsm_remove_uart_port(brd); 230 231 return PCI_ERS_RESULT_NEED_RESET; 232 } 233 234 static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev) 235 { 236 int rc; 237 238 rc = pci_enable_device(pdev); 239 240 if (rc) 241 return PCI_ERS_RESULT_DISCONNECT; 242 243 pci_set_master(pdev); 244 245 return PCI_ERS_RESULT_RECOVERED; 246 } 247 248 static void jsm_io_resume(struct pci_dev *pdev) 249 { 250 struct jsm_board *brd = pci_get_drvdata(pdev); 251 252 pci_restore_state(pdev); 253 pci_save_state(pdev); 254 255 jsm_uart_port_init(brd); 256 } 257 258 static int __init jsm_init_module(void) 259 { 260 int rc; 261 262 rc = uart_register_driver(&jsm_uart_driver); 263 if (!rc) { 264 rc = pci_register_driver(&jsm_driver); 265 if (rc) 266 uart_unregister_driver(&jsm_uart_driver); 267 } 268 return rc; 269 } 270 271 static void __exit jsm_exit_module(void) 272 { 273 pci_unregister_driver(&jsm_driver); 274 uart_unregister_driver(&jsm_uart_driver); 275 } 276 277 module_init(jsm_init_module); 278 module_exit(jsm_exit_module); 279