Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6.git] / drivers / char / pcmcia / ipwireless / main.c
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 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. */
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
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
78 static int ipwireless_probe(struct pcmcia_device *p_dev, void *priv_data)
79 {
80         struct ipw_dev *ipw = priv_data;
81         struct resource *io_resource;
82         int ret;
83
84         p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
85         p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
86
87         /* 0x40 causes it to generate level mode interrupts. */
88         /* 0x04 enables IREQ pin. */
89         p_dev->config_index |= 0x44;
90         p_dev->io_lines = 16;
91         ret = pcmcia_request_io(p_dev);
92         if (ret)
93                 return ret;
94
95         io_resource = request_region(p_dev->resource[0]->start,
96                                 resource_size(p_dev->resource[0]),
97                                 IPWIRELESS_PCCARD_NAME);
98
99         p_dev->resource[2]->flags |=
100                 WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM | WIN_ENABLE;
101
102         ret = pcmcia_request_window(p_dev, p_dev->resource[2], 0);
103         if (ret != 0)
104                 goto exit1;
105
106         ret = pcmcia_map_mem_page(p_dev, p_dev->resource[2], p_dev->card_addr);
107         if (ret != 0)
108                 goto exit2;
109
110         ipw->is_v2_card = resource_size(p_dev->resource[2]) == 0x100;
111
112         ipw->attr_memory = ioremap(p_dev->resource[2]->start,
113                                 resource_size(p_dev->resource[2]));
114         request_mem_region(p_dev->resource[2]->start,
115                         resource_size(p_dev->resource[2]),
116                         IPWIRELESS_PCCARD_NAME);
117
118         p_dev->resource[3]->flags |= WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_AM |
119                                         WIN_ENABLE;
120         p_dev->resource[3]->end = 0; /* this used to be 0x1000 */
121         ret = pcmcia_request_window(p_dev, p_dev->resource[3], 0);
122         if (ret != 0)
123                 goto exit2;
124
125         ret = pcmcia_map_mem_page(p_dev, p_dev->resource[3], 0);
126         if (ret != 0)
127                 goto exit3;
128
129         ipw->attr_memory = ioremap(p_dev->resource[3]->start,
130                                 resource_size(p_dev->resource[3]));
131         request_mem_region(p_dev->resource[3]->start,
132                         resource_size(p_dev->resource[3]),
133                         IPWIRELESS_PCCARD_NAME);
134
135         return 0;
136
137 exit3:
138 exit2:
139         if (ipw->common_memory) {
140                 release_mem_region(p_dev->resource[2]->start,
141                                 resource_size(p_dev->resource[2]));
142                 iounmap(ipw->common_memory);
143         }
144 exit1:
145         release_resource(io_resource);
146         pcmcia_disable_device(p_dev);
147         return -1;
148 }
149
150 static int config_ipwireless(struct ipw_dev *ipw)
151 {
152         struct pcmcia_device *link = ipw->link;
153         int ret = 0;
154
155         ipw->is_v2_card = 0;
156         link->config_flags |= CONF_AUTO_SET_IO | CONF_AUTO_SET_IOMEM |
157                 CONF_ENABLE_IRQ;
158
159         ret = pcmcia_loop_config(link, ipwireless_probe, ipw);
160         if (ret != 0)
161                 return ret;
162
163         INIT_WORK(&ipw->work_reboot, signalled_reboot_work);
164
165         ipwireless_init_hardware_v1(ipw->hardware, link->resource[0]->start,
166                                     ipw->attr_memory, ipw->common_memory,
167                                     ipw->is_v2_card, signalled_reboot_callback,
168                                     ipw);
169
170         ret = pcmcia_request_irq(link, ipwireless_interrupt);
171         if (ret != 0)
172                 goto exit;
173
174         printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": Card type %s\n",
175                         ipw->is_v2_card ? "V2/V3" : "V1");
176         printk(KERN_INFO IPWIRELESS_PCCARD_NAME
177                 ": I/O ports %pR, irq %d\n", link->resource[0],
178                         (unsigned int) link->irq);
179         if (ipw->attr_memory && ipw->common_memory)
180                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
181                         ": attr memory %pR, common memory %pR\n",
182                         link->resource[3],
183                         link->resource[2]);
184
185         ipw->network = ipwireless_network_create(ipw->hardware);
186         if (!ipw->network)
187                 goto exit;
188
189         ipw->tty = ipwireless_tty_create(ipw->hardware, ipw->network);
190         if (!ipw->tty)
191                 goto exit;
192
193         ipwireless_init_hardware_v2_v3(ipw->hardware);
194
195         /*
196          * Do the RequestConfiguration last, because it enables interrupts.
197          * Then we don't get any interrupts before we're ready for them.
198          */
199         ret = pcmcia_enable_device(link);
200         if (ret != 0)
201                 goto exit;
202
203         return 0;
204
205 exit:
206         if (ipw->common_memory) {
207                 release_mem_region(link->resource[2]->start,
208                                 resource_size(link->resource[2]));
209                 iounmap(ipw->common_memory);
210         }
211         if (ipw->attr_memory) {
212                 release_mem_region(link->resource[3]->start,
213                                 resource_size(link->resource[3]));
214                 iounmap(ipw->attr_memory);
215         }
216         pcmcia_disable_device(link);
217         return -1;
218 }
219
220 static void release_ipwireless(struct ipw_dev *ipw)
221 {
222         if (ipw->common_memory) {
223                 release_mem_region(ipw->link->resource[2]->start,
224                                 resource_size(ipw->link->resource[2]));
225                 iounmap(ipw->common_memory);
226         }
227         if (ipw->attr_memory) {
228                 release_mem_region(ipw->link->resource[3]->start,
229                                 resource_size(ipw->link->resource[3]));
230                 iounmap(ipw->attr_memory);
231         }
232         pcmcia_disable_device(ipw->link);
233 }
234
235 /*
236  * ipwireless_attach() creates an "instance" of the driver, allocating
237  * local data structures for one device (one interface).  The device
238  * is registered with Card Services.
239  *
240  * The pcmcia_device structure is initialized, but we don't actually
241  * configure the card at this point -- we wait until we receive a
242  * card insertion event.
243  */
244 static int ipwireless_attach(struct pcmcia_device *link)
245 {
246         struct ipw_dev *ipw;
247         int ret;
248
249         ipw = kzalloc(sizeof(struct ipw_dev), GFP_KERNEL);
250         if (!ipw)
251                 return -ENOMEM;
252
253         ipw->link = link;
254         link->priv = ipw;
255
256         ipw->hardware = ipwireless_hardware_create();
257         if (!ipw->hardware) {
258                 kfree(ipw);
259                 return -ENOMEM;
260         }
261         /* RegisterClient will call config_ipwireless */
262
263         ret = config_ipwireless(ipw);
264
265         if (ret != 0) {
266                 ipwireless_detach(link);
267                 return ret;
268         }
269
270         return 0;
271 }
272
273 /*
274  * This deletes a driver "instance".  The device is de-registered with
275  * Card Services.  If it has been released, all local data structures
276  * are freed.  Otherwise, the structures will be freed when the device
277  * is released.
278  */
279 static void ipwireless_detach(struct pcmcia_device *link)
280 {
281         struct ipw_dev *ipw = link->priv;
282
283         release_ipwireless(ipw);
284
285         if (ipw->tty != NULL)
286                 ipwireless_tty_free(ipw->tty);
287         if (ipw->network != NULL)
288                 ipwireless_network_free(ipw->network);
289         if (ipw->hardware != NULL)
290                 ipwireless_hardware_free(ipw->hardware);
291         kfree(ipw);
292 }
293
294 static struct pcmcia_driver me = {
295         .owner          = THIS_MODULE,
296         .probe          = ipwireless_attach,
297         .remove         = ipwireless_detach,
298         .name           = IPWIRELESS_PCCARD_NAME,
299         .id_table       = ipw_ids
300 };
301
302 /*
303  * Module insertion : initialisation of the module.
304  * Register the card with cardmgr...
305  */
306 static int __init init_ipwireless(void)
307 {
308         int ret;
309
310         ret = ipwireless_tty_init();
311         if (ret != 0)
312                 return ret;
313
314         ret = pcmcia_register_driver(&me);
315         if (ret != 0)
316                 ipwireless_tty_release();
317
318         return ret;
319 }
320
321 /*
322  * Module removal
323  */
324 static void __exit exit_ipwireless(void)
325 {
326         pcmcia_unregister_driver(&me);
327         ipwireless_tty_release();
328 }
329
330 module_init(init_ipwireless);
331 module_exit(exit_ipwireless);
332
333 MODULE_AUTHOR(IPWIRELESS_PCMCIA_AUTHOR);
334 MODULE_DESCRIPTION(IPWIRELESS_PCCARD_NAME " " IPWIRELESS_PCMCIA_VERSION);
335 MODULE_LICENSE("GPL");