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/moduleparam.h> 28#include <linux/pci.h> 29#include <linux/slab.h> 30 31#include "jsm.h" 32 33MODULE_AUTHOR("Digi International, http://www.digi.com"); 34MODULE_DESCRIPTION("Driver for the Digi International " 35 "Neo PCI based product line"); 36MODULE_LICENSE("GPL"); 37MODULE_SUPPORTED_DEVICE("jsm"); 38 39#define JSM_DRIVER_NAME "jsm" 40#define NR_PORTS 32 41#define JSM_MINOR_START 0 42 43struct 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 52static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev, 53 pci_channel_state_t state); 54static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev); 55static void jsm_io_resume(struct pci_dev *pdev); 56 57static 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 63int jsm_debug; 64module_param(jsm_debug, int, 0); 65MODULE_PARM_DESC(jsm_debug, "Driver debugging level"); 66 67static int __devinit 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_printk(INIT, INFO, &brd->pci_dev, 111 "jsm_found_board - NEO adapter\n"); 112 113 /* get the PCI Base Address Registers */ 114 brd->membase = pci_resource_start(pdev, 0); 115 brd->membase_end = pci_resource_end(pdev, 0); 116 117 if (brd->membase & 1) 118 brd->membase &= ~3; 119 else 120 brd->membase &= ~15; 121 122 /* Assign the board_ops struct */ 123 brd->bd_ops = &jsm_neo_ops; 124 125 brd->bd_uart_offset = 0x200; 126 brd->bd_dividend = 921600; 127 128 brd->re_map_membase = ioremap(brd->membase, 0x1000); 129 if (!brd->re_map_membase) { 130 dev_err(&pdev->dev, 131 "card has no PCI Memory resources, " 132 "failing board.\n"); 133 rc = -ENOMEM; 134 goto out_kfree_brd; 135 } 136 137 rc = request_irq(brd->irq, brd->bd_ops->intr, 138 IRQF_SHARED, "JSM", brd); 139 if (rc) { 140 printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq); 141 goto out_iounmap; 142 } 143 144 rc = jsm_tty_init(brd); 145 if (rc < 0) { 146 dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc); 147 rc = -ENXIO; 148 goto out_free_irq; 149 } 150 151 rc = jsm_uart_port_init(brd); 152 if (rc < 0) { 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 /* 163 * allocate flip buffer for board. 164 * 165 * Okay to malloc with GFP_KERNEL, we are not at interrupt 166 * context, and there are no locks held. 167 */ 168 brd->flipbuf = kzalloc(MYFLIPLEN, GFP_KERNEL); 169 if (!brd->flipbuf) { 170 dev_err(&pdev->dev, "memory allocation for flipbuf failed\n"); 171 rc = -ENOMEM; 172 goto out_free_irq; 173 } 174 175 pci_set_drvdata(pdev, brd); 176 pci_save_state(pdev); 177 178 return 0; 179 out_free_irq: 180 jsm_remove_uart_port(brd); 181 free_irq(brd->irq, brd); 182 out_iounmap: 183 iounmap(brd->re_map_membase); 184 out_kfree_brd: 185 kfree(brd); 186 out_release_regions: 187 pci_release_regions(pdev); 188 out_disable_device: 189 pci_disable_device(pdev); 190 out: 191 return rc; 192} 193 194static void __devexit jsm_remove_one(struct pci_dev *pdev) 195{ 196 struct jsm_board *brd = pci_get_drvdata(pdev); 197 int i = 0; 198 199 jsm_remove_uart_port(brd); 200 201 free_irq(brd->irq, brd); 202 iounmap(brd->re_map_membase); 203 204 /* Free all allocated channels structs */ 205 for (i = 0; i < brd->maxports; i++) { 206 if (brd->channels[i]) { 207 kfree(brd->channels[i]->ch_rqueue); 208 kfree(brd->channels[i]->ch_equeue); 209 kfree(brd->channels[i]->ch_wqueue); 210 kfree(brd->channels[i]); 211 } 212 } 213 214 pci_release_regions(pdev); 215 pci_disable_device(pdev); 216 kfree(brd->flipbuf); 217 kfree(brd); 218} 219 220static struct pci_device_id jsm_pci_tbl[] = { 221 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 }, 222 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 }, 223 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 }, 224 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 }, 225 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4_IBM), 0, 0, 4 }, 226 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_NEO_8), 0, 0, 5 }, 227 { 0, } 228}; 229MODULE_DEVICE_TABLE(pci, jsm_pci_tbl); 230 231static struct pci_driver jsm_driver = { 232 .name = "jsm", 233 .id_table = jsm_pci_tbl, 234 .probe = jsm_probe_one, 235 .remove = __devexit_p(jsm_remove_one), 236 .err_handler = &jsm_err_handler, 237}; 238 239static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev, 240 pci_channel_state_t state) 241{ 242 struct jsm_board *brd = pci_get_drvdata(pdev); 243 244 jsm_remove_uart_port(brd); 245 246 return PCI_ERS_RESULT_NEED_RESET; 247} 248 249static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev) 250{ 251 int rc; 252 253 rc = pci_enable_device(pdev); 254 255 if (rc) 256 return PCI_ERS_RESULT_DISCONNECT; 257 258 pci_set_master(pdev); 259 260 return PCI_ERS_RESULT_RECOVERED; 261} 262 263static void jsm_io_resume(struct pci_dev *pdev) 264{ 265 struct jsm_board *brd = pci_get_drvdata(pdev); 266 267 pci_restore_state(pdev); 268 269 jsm_uart_port_init(brd); 270} 271 272static int __init jsm_init_module(void) 273{ 274 int rc; 275 276 rc = uart_register_driver(&jsm_uart_driver); 277 if (!rc) { 278 rc = pci_register_driver(&jsm_driver); 279 if (rc) 280 uart_unregister_driver(&jsm_uart_driver); 281 } 282 return rc; 283} 284 285static void __exit jsm_exit_module(void) 286{ 287 pci_unregister_driver(&jsm_driver); 288 uart_unregister_driver(&jsm_uart_driver); 289} 290 291module_init(jsm_init_module); 292module_exit(jsm_exit_module); 293