1 /*
2 * IPWireless 3G PCMCIA Network Driver
3 *
4 * Original code
5 * by Stephen Blackheath <stephen@blacksapphire.com>,
6 * Ben Martel <benm@symmetric.co.nz>
7 *
8 * Copyrighted as follows:
9 * Copyright (C) 2004 by Symmetric Systems Ltd (NZ)
10 *
11 * Various driver changes and rewrites, port to new kernels
12 * Copyright (C) 2006-2007 Jiri Kosina
13 *
14 * Misc code cleanups and updates
15 * Copyright (C) 2007 David Sterba
16 */
17
18 #include "hardware.h"
19 #include "network.h"
20 #include "main.h"
21 #include "tty.h"
22
23 #include <linux/delay.h>
24 #include <linux/init.h>
25 #include <linux/io.h>
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/sched.h>
29 #include <linux/slab.h>
30
31 #include <pcmcia/cisreg.h>
32 #include <pcmcia/device_id.h>
33 #include <pcmcia/ss.h>
34 #include <pcmcia/ds.h>
35
36 static const struct pcmcia_device_id ipw_ids[] = {
37 PCMCIA_DEVICE_MANF_CARD(0x02f2, 0x0100),
38 PCMCIA_DEVICE_MANF_CARD(0x02f2, 0x0200),
39 PCMCIA_DEVICE_NULL
40 };
41 MODULE_DEVICE_TABLE(pcmcia, ipw_ids);
42
43 static void ipwireless_detach(struct pcmcia_device *link);
44
45 /*
46 * Module params
47 */
48 /* Debug mode: more verbose, print sent/recv bytes */
49 int ipwireless_debug;
50 int ipwireless_loopback;
51 int ipwireless_out_queue = 10;
52
53 module_param_named(debug, ipwireless_debug, int, 0);
54 module_param_named(loopback, ipwireless_loopback, int, 0);
55 module_param_named(out_queue, ipwireless_out_queue, int, 0);
56 MODULE_PARM_DESC(debug, "switch on debug messages [0]");
57 MODULE_PARM_DESC(loopback,
58 "debug: enable ras_raw channel [0]");
59 MODULE_PARM_DESC(out_queue, "debug: set size of outgoing PPP queue [10]");
60
61 /* Executes in process context. */
signalled_reboot_work(struct work_struct * work_reboot)62 static void signalled_reboot_work(struct work_struct *work_reboot)
63 {
64 struct ipw_dev *ipw = container_of(work_reboot, struct ipw_dev,
65 work_reboot);
66 struct pcmcia_device *link = ipw->link;
67 pcmcia_reset_card(link->socket);
68 }
69
signalled_reboot_callback(void * callback_data)70 static void signalled_reboot_callback(void *callback_data)
71 {
72 struct ipw_dev *ipw = (struct ipw_dev *) callback_data;
73
74 /* Delegate to process context. */
75 schedule_work(&ipw->work_reboot);
76 }
77
ipwireless_probe(struct pcmcia_device * p_dev,void * priv_data)78 static int ipwireless_probe(struct pcmcia_device *p_dev, void *priv_data)
79 {
80 struct ipw_dev *ipw = priv_data;
81 int ret;
82
83 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
84 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
85
86 /* 0x40 causes it to generate level mode interrupts. */
87 /* 0x04 enables IREQ pin. */
88 p_dev->config_index |= 0x44;
89 p_dev->io_lines = 16;
90 ret = pcmcia_request_io(p_dev);
91 if (ret)
92 return ret;
93
94 if (!request_region(p_dev->resource[0]->start,
95 resource_size(p_dev->resource[0]),
96 IPWIRELESS_PCCARD_NAME)) {
97 ret = -EBUSY;
98 goto exit;
99 }
100
101 p_dev->resource[2]->flags |=
102 WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM | WIN_ENABLE;
103
104 ret = pcmcia_request_window(p_dev, p_dev->resource[2], 0);
105 if (ret != 0)
106 goto exit1;
107
108 ret = pcmcia_map_mem_page(p_dev, p_dev->resource[2], p_dev->card_addr);
109 if (ret != 0)
110 goto exit1;
111
112 ipw->is_v2_card = resource_size(p_dev->resource[2]) == 0x100;
113
114 ipw->common_memory = ioremap(p_dev->resource[2]->start,
115 resource_size(p_dev->resource[2]));
116 if (!ipw->common_memory) {
117 ret = -ENOMEM;
118 goto exit1;
119 }
120 if (!request_mem_region(p_dev->resource[2]->start,
121 resource_size(p_dev->resource[2]),
122 IPWIRELESS_PCCARD_NAME)) {
123 ret = -EBUSY;
124 goto exit2;
125 }
126
127 p_dev->resource[3]->flags |= WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_AM |
128 WIN_ENABLE;
129 p_dev->resource[3]->end = 0; /* this used to be 0x1000 */
130 ret = pcmcia_request_window(p_dev, p_dev->resource[3], 0);
131 if (ret != 0)
132 goto exit3;
133
134 ret = pcmcia_map_mem_page(p_dev, p_dev->resource[3], 0);
135 if (ret != 0)
136 goto exit3;
137
138 ipw->attr_memory = ioremap(p_dev->resource[3]->start,
139 resource_size(p_dev->resource[3]));
140 if (!ipw->attr_memory) {
141 ret = -ENOMEM;
142 goto exit3;
143 }
144 if (!request_mem_region(p_dev->resource[3]->start,
145 resource_size(p_dev->resource[3]),
146 IPWIRELESS_PCCARD_NAME)) {
147 ret = -EBUSY;
148 goto exit4;
149 }
150
151 return 0;
152
153 exit4:
154 iounmap(ipw->attr_memory);
155 exit3:
156 release_mem_region(p_dev->resource[2]->start,
157 resource_size(p_dev->resource[2]));
158 exit2:
159 iounmap(ipw->common_memory);
160 exit1:
161 release_region(p_dev->resource[0]->start,
162 resource_size(p_dev->resource[0]));
163 exit:
164 pcmcia_disable_device(p_dev);
165 return ret;
166 }
167
config_ipwireless(struct ipw_dev * ipw)168 static int config_ipwireless(struct ipw_dev *ipw)
169 {
170 struct pcmcia_device *link = ipw->link;
171 int ret = 0;
172
173 ipw->is_v2_card = 0;
174 link->config_flags |= CONF_AUTO_SET_IO | CONF_AUTO_SET_IOMEM |
175 CONF_ENABLE_IRQ;
176
177 ret = pcmcia_loop_config(link, ipwireless_probe, ipw);
178 if (ret != 0)
179 return ret;
180
181 INIT_WORK(&ipw->work_reboot, signalled_reboot_work);
182
183 ipwireless_init_hardware_v1(ipw->hardware, link->resource[0]->start,
184 ipw->attr_memory, ipw->common_memory,
185 ipw->is_v2_card, signalled_reboot_callback,
186 ipw);
187
188 ret = pcmcia_request_irq(link, ipwireless_interrupt);
189 if (ret != 0)
190 goto exit;
191
192 printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": Card type %s\n",
193 ipw->is_v2_card ? "V2/V3" : "V1");
194 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
195 ": I/O ports %pR, irq %d\n", link->resource[0],
196 (unsigned int) link->irq);
197 if (ipw->attr_memory && ipw->common_memory)
198 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
199 ": attr memory %pR, common memory %pR\n",
200 link->resource[3],
201 link->resource[2]);
202
203 ipw->network = ipwireless_network_create(ipw->hardware);
204 if (!ipw->network)
205 goto exit;
206
207 ipw->tty = ipwireless_tty_create(ipw->hardware, ipw->network);
208 if (!ipw->tty)
209 goto exit;
210
211 ipwireless_init_hardware_v2_v3(ipw->hardware);
212
213 /*
214 * Do the RequestConfiguration last, because it enables interrupts.
215 * Then we don't get any interrupts before we're ready for them.
216 */
217 ret = pcmcia_enable_device(link);
218 if (ret != 0)
219 goto exit;
220
221 return 0;
222
223 exit:
224 if (ipw->common_memory) {
225 release_mem_region(link->resource[2]->start,
226 resource_size(link->resource[2]));
227 iounmap(ipw->common_memory);
228 }
229 if (ipw->attr_memory) {
230 release_mem_region(link->resource[3]->start,
231 resource_size(link->resource[3]));
232 iounmap(ipw->attr_memory);
233 }
234 pcmcia_disable_device(link);
235 return -1;
236 }
237
release_ipwireless(struct ipw_dev * ipw)238 static void release_ipwireless(struct ipw_dev *ipw)
239 {
240 release_region(ipw->link->resource[0]->start,
241 resource_size(ipw->link->resource[0]));
242 if (ipw->common_memory) {
243 release_mem_region(ipw->link->resource[2]->start,
244 resource_size(ipw->link->resource[2]));
245 iounmap(ipw->common_memory);
246 }
247 if (ipw->attr_memory) {
248 release_mem_region(ipw->link->resource[3]->start,
249 resource_size(ipw->link->resource[3]));
250 iounmap(ipw->attr_memory);
251 }
252 pcmcia_disable_device(ipw->link);
253 }
254
255 /*
256 * ipwireless_attach() creates an "instance" of the driver, allocating
257 * local data structures for one device (one interface). The device
258 * is registered with Card Services.
259 *
260 * The pcmcia_device structure is initialized, but we don't actually
261 * configure the card at this point -- we wait until we receive a
262 * card insertion event.
263 */
ipwireless_attach(struct pcmcia_device * link)264 static int ipwireless_attach(struct pcmcia_device *link)
265 {
266 struct ipw_dev *ipw;
267 int ret;
268
269 ipw = kzalloc(sizeof(struct ipw_dev), GFP_KERNEL);
270 if (!ipw)
271 return -ENOMEM;
272
273 ipw->link = link;
274 link->priv = ipw;
275
276 ipw->hardware = ipwireless_hardware_create();
277 if (!ipw->hardware) {
278 kfree(ipw);
279 return -ENOMEM;
280 }
281 /* RegisterClient will call config_ipwireless */
282
283 ret = config_ipwireless(ipw);
284
285 if (ret != 0) {
286 ipwireless_detach(link);
287 return ret;
288 }
289
290 return 0;
291 }
292
293 /*
294 * This deletes a driver "instance". The device is de-registered with
295 * Card Services. If it has been released, all local data structures
296 * are freed. Otherwise, the structures will be freed when the device
297 * is released.
298 */
ipwireless_detach(struct pcmcia_device * link)299 static void ipwireless_detach(struct pcmcia_device *link)
300 {
301 struct ipw_dev *ipw = link->priv;
302
303 release_ipwireless(ipw);
304
305 if (ipw->tty != NULL)
306 ipwireless_tty_free(ipw->tty);
307 if (ipw->network != NULL)
308 ipwireless_network_free(ipw->network);
309 if (ipw->hardware != NULL)
310 ipwireless_hardware_free(ipw->hardware);
311 kfree(ipw);
312 }
313
314 static struct pcmcia_driver me = {
315 .owner = THIS_MODULE,
316 .probe = ipwireless_attach,
317 .remove = ipwireless_detach,
318 .name = IPWIRELESS_PCCARD_NAME,
319 .id_table = ipw_ids
320 };
321
322 /*
323 * Module insertion : initialisation of the module.
324 * Register the card with cardmgr...
325 */
init_ipwireless(void)326 static int __init init_ipwireless(void)
327 {
328 int ret;
329
330 ret = ipwireless_tty_init();
331 if (ret != 0)
332 return ret;
333
334 ret = pcmcia_register_driver(&me);
335 if (ret != 0)
336 ipwireless_tty_release();
337
338 return ret;
339 }
340
341 /*
342 * Module removal
343 */
exit_ipwireless(void)344 static void __exit exit_ipwireless(void)
345 {
346 pcmcia_unregister_driver(&me);
347 ipwireless_tty_release();
348 }
349
350 module_init(init_ipwireless);
351 module_exit(exit_ipwireless);
352
353 MODULE_AUTHOR(IPWIRELESS_PCMCIA_AUTHOR);
354 MODULE_DESCRIPTION(IPWIRELESS_PCCARD_NAME " " IPWIRELESS_PCMCIA_VERSION);
355 MODULE_LICENSE("GPL");
356