ath9k_hw: Fix power on reset
[linux-2.6.git] / drivers / serial / jsm / jsm_driver.c
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
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 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 __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                 /* XXX: leaking all resources from jsm_tty_init here! */
154                 dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);
155                 rc = -ENXIO;
156                 goto out_free_irq;
157         }
158
159         /* Log the information about the board */
160         dev_info(&pdev->dev, "board %d: Digi Neo (rev %d), irq %d\n",
161                         adapter_count, brd->rev, brd->irq);
162
163         /*
164          * allocate flip buffer for board.
165          *
166          * Okay to malloc with GFP_KERNEL, we are not at interrupt
167          * context, and there are no locks held.
168          */
169         brd->flipbuf = kzalloc(MYFLIPLEN, GFP_KERNEL);
170         if (!brd->flipbuf) {
171                 /* XXX: leaking all resources from jsm_tty_init and
172                         jsm_uart_port_init here! */
173                 dev_err(&pdev->dev, "memory allocation for flipbuf failed\n");
174                 rc = -ENOMEM;
175                 goto out_free_uart;
176         }
177
178         pci_set_drvdata(pdev, brd);
179         pci_save_state(pdev);
180
181         return 0;
182  out_free_uart:
183         jsm_remove_uart_port(brd);
184  out_free_irq:
185         jsm_remove_uart_port(brd);
186         free_irq(brd->irq, brd);
187  out_iounmap:
188         iounmap(brd->re_map_membase);
189  out_kfree_brd:
190         kfree(brd);
191  out_release_regions:
192         pci_release_regions(pdev);
193  out_disable_device:
194         pci_disable_device(pdev);
195  out:
196         return rc;
197 }
198
199 static void __devexit jsm_remove_one(struct pci_dev *pdev)
200 {
201         struct jsm_board *brd = pci_get_drvdata(pdev);
202         int i = 0;
203
204         jsm_remove_uart_port(brd);
205
206         free_irq(brd->irq, brd);
207         iounmap(brd->re_map_membase);
208
209         /* Free all allocated channels structs */
210         for (i = 0; i < brd->maxports; i++) {
211                 if (brd->channels[i]) {
212                         kfree(brd->channels[i]->ch_rqueue);
213                         kfree(brd->channels[i]->ch_equeue);
214                         kfree(brd->channels[i]->ch_wqueue);
215                         kfree(brd->channels[i]);
216                 }
217         }
218
219         pci_release_regions(pdev);
220         pci_disable_device(pdev);
221         kfree(brd->flipbuf);
222         kfree(brd);
223 }
224
225 static struct pci_device_id jsm_pci_tbl[] = {
226         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },
227         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },
228         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },
229         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 },
230         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4_IBM), 0, 0, 4 },
231         { PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_DIGI_NEO_8), 0, 0, 5 },
232         { 0, }
233 };
234 MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);
235
236 static struct pci_driver jsm_driver = {
237         .name           = "jsm",
238         .id_table       = jsm_pci_tbl,
239         .probe          = jsm_probe_one,
240         .remove         = __devexit_p(jsm_remove_one),
241         .err_handler    = &jsm_err_handler,
242 };
243
244 static pci_ers_result_t jsm_io_error_detected(struct pci_dev *pdev,
245                                         pci_channel_state_t state)
246 {
247         struct jsm_board *brd = pci_get_drvdata(pdev);
248
249         jsm_remove_uart_port(brd);
250
251         return PCI_ERS_RESULT_NEED_RESET;
252 }
253
254 static pci_ers_result_t jsm_io_slot_reset(struct pci_dev *pdev)
255 {
256         int rc;
257
258         rc = pci_enable_device(pdev);
259
260         if (rc)
261                 return PCI_ERS_RESULT_DISCONNECT;
262
263         pci_set_master(pdev);
264
265         return PCI_ERS_RESULT_RECOVERED;
266 }
267
268 static void jsm_io_resume(struct pci_dev *pdev)
269 {
270         struct jsm_board *brd = pci_get_drvdata(pdev);
271
272         pci_restore_state(pdev);
273
274         jsm_uart_port_init(brd);
275 }
276
277 static int __init jsm_init_module(void)
278 {
279         int rc;
280
281         rc = uart_register_driver(&jsm_uart_driver);
282         if (!rc) {
283                 rc = pci_register_driver(&jsm_driver);
284                 if (rc)
285                         uart_unregister_driver(&jsm_uart_driver);
286         }
287         return rc;
288 }
289
290 static void __exit jsm_exit_module(void)
291 {
292         pci_unregister_driver(&jsm_driver);
293         uart_unregister_driver(&jsm_uart_driver);
294 }
295
296 module_init(jsm_init_module);
297 module_exit(jsm_exit_module);