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
36static 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};
41MODULE_DEVICE_TABLE(pcmcia, ipw_ids);
42
43static void ipwireless_detach(struct pcmcia_device *link);
44
45/*
46 * Module params
47 */
48/* Debug mode: more verbose, print sent/recv bytes */
49int ipwireless_debug;
50int ipwireless_loopback;
51int ipwireless_out_queue = 10;
52
53module_param_named(debug, ipwireless_debug, int, 0);
54module_param_named(loopback, ipwireless_loopback, int, 0);
55module_param_named(out_queue, ipwireless_out_queue, int, 0);
56MODULE_PARM_DESC(debug, "switch on debug messages [0]");
57MODULE_PARM_DESC(loopback,
58		"debug: enable ras_raw channel [0]");
59MODULE_PARM_DESC(out_queue, "debug: set size of outgoing PPP queue [10]");
60
61/* Executes in process context. */
62static 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
70static 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
78static 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
145exit4:
146	iounmap(ipw->attr_memory);
147exit3:
148	release_mem_region(p_dev->resource[2]->start,
149			resource_size(p_dev->resource[2]));
150exit2:
151	iounmap(ipw->common_memory);
152exit1:
153	release_region(p_dev->resource[0]->start,
154		       resource_size(p_dev->resource[0]));
155exit:
156	pcmcia_disable_device(p_dev);
157	return ret;
158}
159
160static 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
215exit:
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
230static 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 */
256static 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 */
291static 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
306static 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 */
318static 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 */
336static void __exit exit_ipwireless(void)
337{
338	pcmcia_unregister_driver(&me);
339	ipwireless_tty_release();
340}
341
342module_init(init_ipwireless);
343module_exit(exit_ipwireless);
344
345MODULE_AUTHOR(IPWIRELESS_PCMCIA_AUTHOR);
346MODULE_DESCRIPTION(IPWIRELESS_PCCARD_NAME " " IPWIRELESS_PCMCIA_VERSION);
347MODULE_LICENSE("GPL");
348