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1// SPDX-License-Identifier: GPL-2.0+2/************************************************************************3 * Copyright 2003 Digi International (www.digi.com)4 *5 * Copyright (C) 2004 IBM Corporation. All rights reserved.6 *7 * Contact Information:8 * Scott H Kilau <Scott_Kilau@digi.com>9 * Wendy Xiong <wendyx@us.ibm.com>10 *11 *12 ***********************************************************************/13#include <linux/module.h>14#include <linux/pci.h>15#include <linux/slab.h>16 17#include "jsm.h"18 19MODULE_AUTHOR("Digi International, https://www.digi.com");20MODULE_DESCRIPTION("Driver for the Digi International Neo and Classic PCI based product line");21MODULE_LICENSE("GPL");22 23#define JSM_DRIVER_NAME "jsm"24#define NR_PORTS 3225#define JSM_MINOR_START 026 27struct uart_driver jsm_uart_driver = {28 .owner = THIS_MODULE,29 .driver_name = JSM_DRIVER_NAME,30 .dev_name = "ttyn",31 .major = 0,32 .minor = JSM_MINOR_START,33 .nr = NR_PORTS,34};35 36static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev,37 pci_channel_state_t state);38static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev);39static void jsm_io_resume(struct pci_dev *pdev);40 41static const struct pci_error_handlers jsm_err_handler = {42 .error_detected = jsm_io_error_detected,43 .slot_reset = jsm_io_slot_reset,44 .resume = jsm_io_resume,45};46 47int jsm_debug;48module_param(jsm_debug, int, 0);49MODULE_PARM_DESC(jsm_debug, "Driver debugging level");50 51static int jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)52{53 int rc = 0;54 struct jsm_board *brd;55 static int adapter_count;56 57 rc = pci_enable_device(pdev);58 if (rc) {59 dev_err(&pdev->dev, "Device enable FAILED\n");60 goto out;61 }62 63 rc = pci_request_regions(pdev, JSM_DRIVER_NAME);64 if (rc) {65 dev_err(&pdev->dev, "pci_request_region FAILED\n");66 goto out_disable_device;67 }68 69 brd = kzalloc(sizeof(*brd), GFP_KERNEL);70 if (!brd) {71 rc = -ENOMEM;72 goto out_release_regions;73 }74 75 /* store the info for the board we've found */76 brd->boardnum = adapter_count++;77 brd->pci_dev = pdev;78 79 switch (pdev->device) {80 case PCI_DEVICE_ID_NEO_2DB9:81 case PCI_DEVICE_ID_NEO_2DB9PRI:82 case PCI_DEVICE_ID_NEO_2RJ45:83 case PCI_DEVICE_ID_NEO_2RJ45PRI:84 case PCI_DEVICE_ID_NEO_2_422_485:85 brd->maxports = 2;86 break;87 88 case PCI_DEVICE_ID_CLASSIC_4:89 case PCI_DEVICE_ID_CLASSIC_4_422:90 case PCI_DEVICE_ID_NEO_4:91 case PCIE_DEVICE_ID_NEO_4:92 case PCIE_DEVICE_ID_NEO_4RJ45:93 case PCIE_DEVICE_ID_NEO_4_IBM:94 brd->maxports = 4;95 break;96 97 case PCI_DEVICE_ID_CLASSIC_8:98 case PCI_DEVICE_ID_CLASSIC_8_422:99 case PCI_DEVICE_ID_DIGI_NEO_8:100 case PCIE_DEVICE_ID_NEO_8:101 case PCIE_DEVICE_ID_NEO_8RJ45:102 brd->maxports = 8;103 break;104 105 default:106 brd->maxports = 1;107 break;108 }109 110 spin_lock_init(&brd->bd_intr_lock);111 112 /* store which revision we have */113 brd->rev = pdev->revision;114 115 brd->irq = pdev->irq;116 117 switch (pdev->device) {118 case PCI_DEVICE_ID_CLASSIC_4:119 case PCI_DEVICE_ID_CLASSIC_4_422:120 case PCI_DEVICE_ID_CLASSIC_8:121 case PCI_DEVICE_ID_CLASSIC_8_422:122 123 jsm_dbg(INIT, &brd->pci_dev,124 "jsm_found_board - Classic adapter\n");125 126 /*127 * For PCI ClassicBoards128 * PCI Local Address (.i.e. "resource" number) space129 * 0 PLX Memory Mapped Config130 * 1 PLX I/O Mapped Config131 * 2 I/O Mapped UARTs and Status132 * 3 Memory Mapped VPD133 * 4 Memory Mapped UARTs and Status134 */135 136 /* Get the PCI Base Address Registers */137 brd->membase = pci_resource_start(pdev, 4);138 brd->membase_end = pci_resource_end(pdev, 4);139 140 if (brd->membase & 0x1)141 brd->membase &= ~0x3;142 else143 brd->membase &= ~0xF;144 145 brd->iobase = pci_resource_start(pdev, 1);146 brd->iobase_end = pci_resource_end(pdev, 1);147 brd->iobase = ((unsigned int)(brd->iobase)) & 0xFFFE;148 149 /* Assign the board_ops struct */150 brd->bd_ops = &jsm_cls_ops;151 152 brd->bd_uart_offset = 0x8;153 brd->bd_dividend = 921600;154 155 brd->re_map_membase = ioremap(brd->membase,156 pci_resource_len(pdev, 4));157 if (!brd->re_map_membase) {158 dev_err(&pdev->dev,159 "Card has no PCI Memory resources, failing board.\n");160 rc = -ENOMEM;161 goto out_kfree_brd;162 }163 164 /*165 * Enable Local Interrupt 1 (0x1),166 * Local Interrupt 1 Polarity Active high (0x2),167 * Enable PCI interrupt (0x43)168 */169 outb(0x43, brd->iobase + 0x4c);170 171 break;172 173 case PCI_DEVICE_ID_NEO_2DB9:174 case PCI_DEVICE_ID_NEO_2DB9PRI:175 case PCI_DEVICE_ID_NEO_2RJ45:176 case PCI_DEVICE_ID_NEO_2RJ45PRI:177 case PCI_DEVICE_ID_NEO_2_422_485:178 case PCI_DEVICE_ID_NEO_4:179 case PCIE_DEVICE_ID_NEO_4:180 case PCIE_DEVICE_ID_NEO_4RJ45:181 case PCIE_DEVICE_ID_NEO_4_IBM:182 case PCI_DEVICE_ID_DIGI_NEO_8:183 case PCIE_DEVICE_ID_NEO_8:184 case PCIE_DEVICE_ID_NEO_8RJ45:185 186 jsm_dbg(INIT, &brd->pci_dev, "jsm_found_board - NEO adapter\n");187 188 /* get the PCI Base Address Registers */189 brd->membase = pci_resource_start(pdev, 0);190 brd->membase_end = pci_resource_end(pdev, 0);191 192 if (brd->membase & 1)193 brd->membase &= ~0x3;194 else195 brd->membase &= ~0xF;196 197 /* Assign the board_ops struct */198 brd->bd_ops = &jsm_neo_ops;199 200 brd->bd_uart_offset = 0x200;201 brd->bd_dividend = 921600;202 203 brd->re_map_membase = ioremap(brd->membase,204 pci_resource_len(pdev, 0));205 if (!brd->re_map_membase) {206 dev_err(&pdev->dev,207 "Card has no PCI Memory resources, failing board.\n");208 rc = -ENOMEM;209 goto out_kfree_brd;210 }211 212 break;213 default:214 rc = -ENXIO;215 goto out_kfree_brd;216 }217 218 rc = request_irq(brd->irq, brd->bd_ops->intr, IRQF_SHARED, "JSM", brd);219 if (rc) {220 dev_warn(&pdev->dev, "Failed to hook IRQ %d\n", brd->irq);221 goto out_iounmap;222 }223 224 rc = jsm_tty_init(brd);225 if (rc < 0) {226 dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);227 rc = -ENXIO;228 goto out_free_irq;229 }230 231 rc = jsm_uart_port_init(brd);232 if (rc < 0) {233 /* XXX: leaking all resources from jsm_tty_init here! */234 dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);235 rc = -ENXIO;236 goto out_free_irq;237 }238 239 /* Log the information about the board */240 dev_info(&pdev->dev, "board %d: Digi Classic/Neo (rev %d), irq %d\n",241 adapter_count, brd->rev, brd->irq);242 243 pci_set_drvdata(pdev, brd);244 pci_save_state(pdev);245 246 return 0;247 out_free_irq:248 jsm_remove_uart_port(brd);249 free_irq(brd->irq, brd);250 out_iounmap:251 iounmap(brd->re_map_membase);252 out_kfree_brd:253 kfree(brd);254 out_release_regions:255 pci_release_regions(pdev);256 out_disable_device:257 pci_disable_device(pdev);258 out:259 return rc;260}261 262static void jsm_remove_one(struct pci_dev *pdev)263{264 struct jsm_board *brd = pci_get_drvdata(pdev);265 int i = 0;266 267 switch (pdev->device) {268 case PCI_DEVICE_ID_CLASSIC_4:269 case PCI_DEVICE_ID_CLASSIC_4_422:270 case PCI_DEVICE_ID_CLASSIC_8:271 case PCI_DEVICE_ID_CLASSIC_8_422:272 /* Tell card not to interrupt anymore. */273 outb(0x0, brd->iobase + 0x4c);274 break;275 default:276 break;277 }278 279 jsm_remove_uart_port(brd);280 281 free_irq(brd->irq, brd);282 iounmap(brd->re_map_membase);283 284 /* Free all allocated channels structs */285 for (i = 0; i < brd->maxports; i++) {286 if (brd->channels[i]) {287 kfree(brd->channels[i]->ch_rqueue);288 kfree(brd->channels[i]->ch_equeue);289 kfree(brd->channels[i]);290 }291 }292 293 pci_release_regions(pdev);294 pci_disable_device(pdev);295 kfree(brd);296}297 298static const struct pci_device_id jsm_pci_tbl[] = {299 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },300 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },301 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },302 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 },303 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4_IBM), 0, 0, 4 },304 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_NEO_8), 0, 0, 5 },305 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_4), 0, 0, 6 },306 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_1_422), 0, 0, 7 },307 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_1_422_485), 0, 0, 8 },308 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2_422_485), 0, 0, 9 },309 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_8), 0, 0, 10 },310 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4), 0, 0, 11 },311 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4RJ45), 0, 0, 12 },312 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_8RJ45), 0, 0, 13 },313 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_4), 0, 0, 14 },314 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_4_422), 0, 0, 15 },315 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_8), 0, 0, 16 },316 { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_CLASSIC_8_422), 0, 0, 17 },317 { 0, }318};319MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);320 321static struct pci_driver jsm_driver = {322 .name = JSM_DRIVER_NAME,323 .id_table = jsm_pci_tbl,324 .probe = jsm_probe_one,325 .remove = jsm_remove_one,326 .err_handler = &jsm_err_handler,327};328 329static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev,330 pci_channel_state_t state)331{332 struct jsm_board *brd = pci_get_drvdata(pdev);333 334 jsm_remove_uart_port(brd);335 336 return PCI_ERS_RESULT_NEED_RESET;337}338 339static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev)340{341 int rc;342 343 rc = pci_enable_device(pdev);344 345 if (rc)346 return PCI_ERS_RESULT_DISCONNECT;347 348 pci_set_master(pdev);349 350 return PCI_ERS_RESULT_RECOVERED;351}352 353static void jsm_io_resume(struct pci_dev *pdev)354{355 struct jsm_board *brd = pci_get_drvdata(pdev);356 357 pci_restore_state(pdev);358 pci_save_state(pdev);359 360 jsm_uart_port_init(brd);361}362 363static int __init jsm_init_module(void)364{365 int rc;366 367 rc = uart_register_driver(&jsm_uart_driver);368 if (!rc) {369 rc = pci_register_driver(&jsm_driver);370 if (rc)371 uart_unregister_driver(&jsm_uart_driver);372 }373 return rc;374}375 376static void __exit jsm_exit_module(void)377{378 pci_unregister_driver(&jsm_driver);379 uart_unregister_driver(&jsm_uart_driver);380}381 382module_init(jsm_init_module);383module_exit(jsm_exit_module);384