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Linux/drivers/tty/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 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. */
 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         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 (!request_mem_region(p_dev->resource[2]->start,
117                                 resource_size(p_dev->resource[2]),
118                                 IPWIRELESS_PCCARD_NAME)) {
119                 ret = -EBUSY;
120                 goto exit2;
121         }
122 
123         p_dev->resource[3]->flags |= WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_AM |
124                                         WIN_ENABLE;
125         p_dev->resource[3]->end = 0; /* this used to be 0x1000 */
126         ret = pcmcia_request_window(p_dev, p_dev->resource[3], 0);
127         if (ret != 0)
128                 goto exit3;
129 
130         ret = pcmcia_map_mem_page(p_dev, p_dev->resource[3], 0);
131         if (ret != 0)
132                 goto exit3;
133 
134         ipw->attr_memory = ioremap(p_dev->resource[3]->start,
135                                 resource_size(p_dev->resource[3]));
136         if (!request_mem_region(p_dev->resource[3]->start,
137                                 resource_size(p_dev->resource[3]),
138                                 IPWIRELESS_PCCARD_NAME)) {
139                 ret = -EBUSY;
140                 goto exit4;
141         }
142 
143         return 0;
144 
145 exit4:
146         iounmap(ipw->attr_memory);
147 exit3:
148         release_mem_region(p_dev->resource[2]->start,
149                         resource_size(p_dev->resource[2]));
150 exit2:
151         iounmap(ipw->common_memory);
152 exit1:
153         release_region(p_dev->resource[0]->start,
154                        resource_size(p_dev->resource[0]));
155 exit:
156         pcmcia_disable_device(p_dev);
157         return ret;
158 }
159 
160 static int config_ipwireless(struct ipw_dev *ipw)
161 {
162         struct pcmcia_device *link = ipw->link;
163         int ret = 0;
164 
165         ipw->is_v2_card = 0;
166         link->config_flags |= CONF_AUTO_SET_IO | CONF_AUTO_SET_IOMEM |
167                 CONF_ENABLE_IRQ;
168 
169         ret = pcmcia_loop_config(link, ipwireless_probe, ipw);
170         if (ret != 0)
171                 return ret;
172 
173         INIT_WORK(&ipw->work_reboot, signalled_reboot_work);
174 
175         ipwireless_init_hardware_v1(ipw->hardware, link->resource[0]->start,
176                                     ipw->attr_memory, ipw->common_memory,
177                                     ipw->is_v2_card, signalled_reboot_callback,
178                                     ipw);
179 
180         ret = pcmcia_request_irq(link, ipwireless_interrupt);
181         if (ret != 0)
182                 goto exit;
183 
184         printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": Card type %s\n",
185                         ipw->is_v2_card ? "V2/V3" : "V1");
186         printk(KERN_INFO IPWIRELESS_PCCARD_NAME
187                 ": I/O ports %pR, irq %d\n", link->resource[0],
188                         (unsigned int) link->irq);
189         if (ipw->attr_memory && ipw->common_memory)
190                 printk(KERN_INFO IPWIRELESS_PCCARD_NAME
191                         ": attr memory %pR, common memory %pR\n",
192                         link->resource[3],
193                         link->resource[2]);
194 
195         ipw->network = ipwireless_network_create(ipw->hardware);
196         if (!ipw->network)
197                 goto exit;
198 
199         ipw->tty = ipwireless_tty_create(ipw->hardware, ipw->network);
200         if (!ipw->tty)
201                 goto exit;
202 
203         ipwireless_init_hardware_v2_v3(ipw->hardware);
204 
205         /*
206          * Do the RequestConfiguration last, because it enables interrupts.
207          * Then we don't get any interrupts before we're ready for them.
208          */
209         ret = pcmcia_enable_device(link);
210         if (ret != 0)
211                 goto exit;
212 
213         return 0;
214 
215 exit:
216         if (ipw->common_memory) {
217                 release_mem_region(link->resource[2]->start,
218                                 resource_size(link->resource[2]));
219                 iounmap(ipw->common_memory);
220         }
221         if (ipw->attr_memory) {
222                 release_mem_region(link->resource[3]->start,
223                                 resource_size(link->resource[3]));
224                 iounmap(ipw->attr_memory);
225         }
226         pcmcia_disable_device(link);
227         return -1;
228 }
229 
230 static void release_ipwireless(struct ipw_dev *ipw)
231 {
232         release_region(ipw->link->resource[0]->start,
233                        resource_size(ipw->link->resource[0]));
234         if (ipw->common_memory) {
235                 release_mem_region(ipw->link->resource[2]->start,
236                                 resource_size(ipw->link->resource[2]));
237                 iounmap(ipw->common_memory);
238         }
239         if (ipw->attr_memory) {
240                 release_mem_region(ipw->link->resource[3]->start,
241                                 resource_size(ipw->link->resource[3]));
242                 iounmap(ipw->attr_memory);
243         }
244         pcmcia_disable_device(ipw->link);
245 }
246 
247 /*
248  * ipwireless_attach() creates an "instance" of the driver, allocating
249  * local data structures for one device (one interface).  The device
250  * is registered with Card Services.
251  *
252  * The pcmcia_device structure is initialized, but we don't actually
253  * configure the card at this point -- we wait until we receive a
254  * card insertion event.
255  */
256 static int ipwireless_attach(struct pcmcia_device *link)
257 {
258         struct ipw_dev *ipw;
259         int ret;
260 
261         ipw = kzalloc(sizeof(struct ipw_dev), GFP_KERNEL);
262         if (!ipw)
263                 return -ENOMEM;
264 
265         ipw->link = link;
266         link->priv = ipw;
267 
268         ipw->hardware = ipwireless_hardware_create();
269         if (!ipw->hardware) {
270                 kfree(ipw);
271                 return -ENOMEM;
272         }
273         /* RegisterClient will call config_ipwireless */
274 
275         ret = config_ipwireless(ipw);
276 
277         if (ret != 0) {
278                 ipwireless_detach(link);
279                 return ret;
280         }
281 
282         return 0;
283 }
284 
285 /*
286  * This deletes a driver "instance".  The device is de-registered with
287  * Card Services.  If it has been released, all local data structures
288  * are freed.  Otherwise, the structures will be freed when the device
289  * is released.
290  */
291 static void ipwireless_detach(struct pcmcia_device *link)
292 {
293         struct ipw_dev *ipw = link->priv;
294 
295         release_ipwireless(ipw);
296 
297         if (ipw->tty != NULL)
298                 ipwireless_tty_free(ipw->tty);
299         if (ipw->network != NULL)
300                 ipwireless_network_free(ipw->network);
301         if (ipw->hardware != NULL)
302                 ipwireless_hardware_free(ipw->hardware);
303         kfree(ipw);
304 }
305 
306 static struct pcmcia_driver me = {
307         .owner          = THIS_MODULE,
308         .probe          = ipwireless_attach,
309         .remove         = ipwireless_detach,
310         .name           = IPWIRELESS_PCCARD_NAME,
311         .id_table       = ipw_ids
312 };
313 
314 /*
315  * Module insertion : initialisation of the module.
316  * Register the card with cardmgr...
317  */
318 static int __init init_ipwireless(void)
319 {
320         int ret;
321 
322         ret = ipwireless_tty_init();
323         if (ret != 0)
324                 return ret;
325 
326         ret = pcmcia_register_driver(&me);
327         if (ret != 0)
328                 ipwireless_tty_release();
329 
330         return ret;
331 }
332 
333 /*
334  * Module removal
335  */
336 static void __exit exit_ipwireless(void)
337 {
338         pcmcia_unregister_driver(&me);
339         ipwireless_tty_release();
340 }
341 
342 module_init(init_ipwireless);
343 module_exit(exit_ipwireless);
344 
345 MODULE_AUTHOR(IPWIRELESS_PCMCIA_AUTHOR);
346 MODULE_DESCRIPTION(IPWIRELESS_PCCARD_NAME " " IPWIRELESS_PCMCIA_VERSION);
347 MODULE_LICENSE("GPL");
348 

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