summaryrefslogtreecommitdiffstats
path: root/drivers/uwb/i1480/dfu/usb.c
blob: c7080d497311df9b15784ce3108c6e00d6b94d7c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
/*
 * Intel Wireless UWB Link 1480
 * USB SKU firmware upload implementation
 *
 * Copyright (C) 2005-2006 Intel Corporation
 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 *
 *
 * This driver will prepare the i1480 device to behave as a real
 * Wireless USB HWA adaptor by uploading the firmware.
 *
 * When the device is connected or driver is loaded, i1480_usb_probe()
 * is called--this will allocate and initialize the device structure,
 * fill in the pointers to the common functions (read, write,
 * wait_init_done and cmd for HWA command execution) and once that is
 * done, call the common firmware uploading routine. Then clean up and
 * return -ENODEV, as we don't attach to the device.
 *
 * The rest are the basic ops we implement that the fw upload code
 * uses to do its job. All the ops in the common code are i1480->NAME,
 * the functions are i1480_usb_NAME().
 */
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/uwb.h>
#include <linux/usb/wusb.h>
#include <linux/usb/wusb-wa.h>
#include "i1480-dfu.h"

struct i1480_usb {
	struct i1480 i1480;
	struct usb_device *usb_dev;
	struct usb_interface *usb_iface;
	struct urb *neep_urb;	/* URB for reading from EP1 */
};


static
void i1480_usb_init(struct i1480_usb *i1480_usb)
{
	i1480_init(&i1480_usb->i1480);
}


static
int i1480_usb_create(struct i1480_usb *i1480_usb, struct usb_interface *iface)
{
	struct usb_device *usb_dev = interface_to_usbdev(iface);
	int result = -ENOMEM;

	i1480_usb->usb_dev = usb_get_dev(usb_dev);	/* bind the USB device */
	i1480_usb->usb_iface = usb_get_intf(iface);
	usb_set_intfdata(iface, i1480_usb);		/* Bind the driver to iface0 */
	i1480_usb->neep_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (i1480_usb->neep_urb == NULL)
		goto error;
	return 0;

error:
	usb_set_intfdata(iface, NULL);
	usb_put_intf(iface);
	usb_put_dev(usb_dev);
	return result;
}


static
void i1480_usb_destroy(struct i1480_usb *i1480_usb)
{
	usb_kill_urb(i1480_usb->neep_urb);
	usb_free_urb(i1480_usb->neep_urb);
	usb_set_intfdata(i1480_usb->usb_iface, NULL);
	usb_put_intf(i1480_usb->usb_iface);
	usb_put_dev(i1480_usb->usb_dev);
}


/**
 * Write a buffer to a memory address in the i1480 device
 *
 * @i1480:  i1480 instance
 * @memory_address:
 *          Address where to write the data buffer to.
 * @buffer: Buffer to the data
 * @size:   Size of the buffer [has to be < 512].
 * @returns: 0 if ok, < 0 errno code on error.
 *
 * Data buffers to USB cannot be on the stack or in vmalloc'ed areas,
 * so we copy it to the local i1480 buffer before proceeding. In any
 * case, we have a max size we can send, soooo.
 */
static
int i1480_usb_write(struct i1480 *i1480, u32 memory_address,
		    const void *buffer, size_t size)
{
	int result = 0;
	struct i1480_usb *i1480_usb = container_of(i1480, struct i1480_usb, i1480);
	size_t buffer_size, itr = 0;

	BUG_ON(size & 0x3); /* Needs to be a multiple of 4 */
	while (size > 0) {
		buffer_size = size < i1480->buf_size ? size : i1480->buf_size;
		memcpy(i1480->cmd_buf, buffer + itr, buffer_size);
		result = usb_control_msg(
			i1480_usb->usb_dev, usb_sndctrlpipe(i1480_usb->usb_dev, 0),
			0xf0, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			cpu_to_le16(memory_address & 0xffff),
			cpu_to_le16((memory_address >> 16) & 0xffff),
			i1480->cmd_buf, buffer_size, 100 /* FIXME: arbitrary */);
		if (result < 0)
			break;
		itr += result;
		memory_address += result;
		size -= result;
	}
	return result;
}


/**
 * Read a block [max size 512] of the device's memory to @i1480's buffer.
 *
 * @i1480: i1480 instance
 * @memory_address:
 *         Address where to read from.
 * @size:  Size to read. Smaller than or equal to 512.
 * @returns: >= 0 number of bytes written if ok, < 0 errno code on error.
 *
 * NOTE: if the memory address or block is incorrect, you might get a
 *       stall or a different memory read. Caller has to verify the
 *       memory address and size passed back in the @neh structure.
 */
static
int i1480_usb_read(struct i1480 *i1480, u32 addr, size_t size)
{
	ssize_t result = 0, bytes = 0;
	size_t itr, read_size = i1480->buf_size;
	struct i1480_usb *i1480_usb = container_of(i1480, struct i1480_usb, i1480);

	BUG_ON(size > i1480->buf_size);
	BUG_ON(size & 0x3); /* Needs to be a multiple of 4 */
	BUG_ON(read_size > 512);

	if (addr >= 0x8000d200 && addr < 0x8000d400)	/* Yeah, HW quirk */
		read_size = 4;

	for (itr = 0; itr < size; itr += read_size) {
		size_t itr_addr = addr + itr;
		size_t itr_size = min(read_size, size - itr);
		result = usb_control_msg(
			i1480_usb->usb_dev, usb_rcvctrlpipe(i1480_usb->usb_dev, 0),
			0xf0, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
			cpu_to_le16(itr_addr & 0xffff),
			cpu_to_le16((itr_addr >> 16) & 0xffff),
			i1480->cmd_buf + itr, itr_size,
			100 /* FIXME: arbitrary */);
		if (result < 0) {
			dev_err(i1480->dev, "%s: USB read error: %zd\n",
				__func__, result);
			goto out;
		}
		if (result != itr_size) {
			result = -EIO;
			dev_err(i1480->dev,
				"%s: partial read got only %zu bytes vs %zu expected\n",
				__func__, result, itr_size);
			goto out;
		}
		bytes += result;
	}
	result = bytes;
out:
	return result;
}


/**
 * Callback for reads on the notification/event endpoint
 *
 * Just enables the completion read handler.
 */
static
void i1480_usb_neep_cb(struct urb *urb)
{
	struct i1480 *i1480 = urb->context;
	struct device *dev = i1480->dev;

	switch (urb->status) {
	case 0:
		break;
	case -ECONNRESET:	/* Not an error, but a controlled situation; */
	case -ENOENT:		/* (we killed the URB)...so, no broadcast */
		dev_dbg(dev, "NEEP: reset/noent %d\n", urb->status);
		break;
	case -ESHUTDOWN:	/* going away! */
		dev_dbg(dev, "NEEP: down %d\n", urb->status);
		break;
	default:
		dev_err(dev, "NEEP: unknown status %d\n", urb->status);
		break;
	}
	i1480->evt_result = urb->actual_length;
	complete(&i1480->evt_complete);
	return;
}


/**
 * Wait for the MAC FW to initialize
 *
 * MAC FW sends a 0xfd/0101/00 notification to EP1 when done
 * initializing. Get that notification into i1480->evt_buf; upper layer
 * will verify it.
 *
 * Set i1480->evt_result with the result of getting the event or its
 * size (if succesful).
 *
 * Delivers the data directly to i1480->evt_buf
 */
static
int i1480_usb_wait_init_done(struct i1480 *i1480)
{
	int result;
	struct device *dev = i1480->dev;
	struct i1480_usb *i1480_usb = container_of(i1480, struct i1480_usb, i1480);
	struct usb_endpoint_descriptor *epd;

	init_completion(&i1480->evt_complete);
	i1480->evt_result = -EINPROGRESS;
	epd = &i1480_usb->usb_iface->cur_altsetting->endpoint[0].desc;
	usb_fill_int_urb(i1480_usb->neep_urb, i1480_usb->usb_dev,
			 usb_rcvintpipe(i1480_usb->usb_dev, epd->bEndpointAddress),
			 i1480->evt_buf, i1480->buf_size,
			 i1480_usb_neep_cb, i1480, epd->bInterval);
	result = usb_submit_urb(i1480_usb->neep_urb, GFP_KERNEL);
	if (result < 0) {
		dev_err(dev, "init done: cannot submit NEEP read: %d\n",
			result);
		goto error_submit;
	}
	/* Wait for the USB callback to get the data */
	result = wait_for_completion_interruptible_timeout(
		&i1480->evt_complete, HZ);
	if (result <= 0) {
		result = result == 0 ? -ETIMEDOUT : result;
		goto error_wait;
	}
	usb_kill_urb(i1480_usb->neep_urb);
	return 0;

error_wait:
	usb_kill_urb(i1480_usb->neep_urb);
error_submit:
	i1480->evt_result = result;
	return result;
}


/**
 * Generic function for issuing commands to the i1480
 *
 * @i1480:      i1480 instance
 * @cmd_name:   Name of the command (for error messages)
 * @cmd:        Pointer to command buffer
 * @cmd_size:   Size of the command buffer
 * @reply:      Buffer for the reply event
 * @reply_size: Expected size back (including RCEB); the reply buffer
 *              is assumed to be as big as this.
 * @returns:    >= 0 size of the returned event data if ok,
 *              < 0 errno code on error.
 *
 * Arms the NE handle, issues the command to the device and checks the
 * basics of the reply event.
 */
static
int i1480_usb_cmd(struct i1480 *i1480, const char *cmd_name, size_t cmd_size)
{
	int result;
	struct device *dev = i1480->dev;
	struct i1480_usb *i1480_usb = container_of(i1480, struct i1480_usb, i1480);
	struct usb_endpoint_descriptor *epd;
	struct uwb_rccb *cmd = i1480->cmd_buf;
	u8 iface_no;

	/* Post a read on the notification & event endpoint */
	iface_no = i1480_usb->usb_iface->cur_altsetting->desc.bInterfaceNumber;
	epd = &i1480_usb->usb_iface->cur_altsetting->endpoint[0].desc;
	usb_fill_int_urb(
		i1480_usb->neep_urb, i1480_usb->usb_dev,
		usb_rcvintpipe(i1480_usb->usb_dev, epd->bEndpointAddress),
		i1480->evt_buf, i1480->buf_size,
		i1480_usb_neep_cb, i1480, epd->bInterval);
	result = usb_submit_urb(i1480_usb->neep_urb, GFP_KERNEL);
	if (result < 0) {
		dev_err(dev, "%s: cannot submit NEEP read: %d\n",
			cmd_name, result);
			goto error_submit_ep1;
	}
	/* Now post the command on EP0 */
	result = usb_control_msg(
		i1480_usb->usb_dev, usb_sndctrlpipe(i1480_usb->usb_dev, 0),
		WA_EXEC_RC_CMD,
		USB_DIR_OUT | USB_RECIP_INTERFACE | USB_TYPE_CLASS,
		0, iface_no,
		cmd, cmd_size,
		100 /* FIXME: this is totally arbitrary */);
	if (result < 0) {
		dev_err(dev, "%s: control request failed: %d\n",
			cmd_name, result);
		goto error_submit_ep0;
	}
	return result;

error_submit_ep0:
	usb_kill_urb(i1480_usb->neep_urb);
error_submit_ep1:
	return result;
}


/*
 * Probe a i1480 device for uploading firmware.
 *
 * We attach only to interface #0, which is the radio control interface.
 */
static
int i1480_usb_probe(struct usb_interface *iface, const struct usb_device_id *id)
{
	struct i1480_usb *i1480_usb;
	struct i1480 *i1480;
	struct device *dev = &iface->dev;
	int result;

	result = -ENODEV;
	if (iface->cur_altsetting->desc.bInterfaceNumber != 0) {
		dev_dbg(dev, "not attaching to iface %d\n",
			iface->cur_altsetting->desc.bInterfaceNumber);
		goto error;
	}
	if (iface->num_altsetting > 1
	    && interface_to_usbdev(iface)->descriptor.idProduct == 0xbabe) {
		/* Need altsetting #1 [HW QUIRK] or EP1 won't work */
		result = usb_set_interface(interface_to_usbdev(iface), 0, 1);
		if (result < 0)
			dev_warn(dev,
				 "can't set altsetting 1 on iface 0: %d\n",
				 result);
	}

	result = -ENOMEM;
	i1480_usb = kzalloc(sizeof(*i1480_usb), GFP_KERNEL);
	if (i1480_usb == NULL) {
		dev_err(dev, "Unable to allocate instance\n");
		goto error;
	}
	i1480_usb_init(i1480_usb);

	i1480 = &i1480_usb->i1480;
	i1480->buf_size = 512;
	i1480->cmd_buf = kmalloc(2 * i1480->buf_size, GFP_KERNEL);
	if (i1480->cmd_buf == NULL) {
		dev_err(dev, "Cannot allocate transfer buffers\n");
		result = -ENOMEM;
		goto error_buf_alloc;
	}
	i1480->evt_buf = i1480->cmd_buf + i1480->buf_size;

	result = i1480_usb_create(i1480_usb, iface);
	if (result < 0) {
		dev_err(dev, "Cannot create instance: %d\n", result);
		goto error_create;
	}

	/* setup the fops and upload the firmware */
	i1480->pre_fw_name = "i1480-pre-phy-0.0.bin";
	i1480->mac_fw_name = "i1480-usb-0.0.bin";
	i1480->mac_fw_name_deprecate = "ptc-0.0.bin";
	i1480->phy_fw_name = "i1480-phy-0.0.bin";
	i1480->dev = &iface->dev;
	i1480->write = i1480_usb_write;
	i1480->read = i1480_usb_read;
	i1480->rc_setup = NULL;
	i1480->wait_init_done = i1480_usb_wait_init_done;
	i1480->cmd = i1480_usb_cmd;

	result = i1480_fw_upload(&i1480_usb->i1480);	/* the real thing */
	if (result >= 0) {
		usb_reset_device(i1480_usb->usb_dev);
		result = -ENODEV;	/* we don't want to bind to the iface */
	}
	i1480_usb_destroy(i1480_usb);
error_create:
	kfree(i1480->cmd_buf);
error_buf_alloc:
	kfree(i1480_usb);
error:
	return result;
}

#define i1480_USB_DEV(v, p)				\
{							\
	.match_flags = USB_DEVICE_ID_MATCH_DEVICE	\
		 | USB_DEVICE_ID_MATCH_DEV_INFO		\
		 | USB_DEVICE_ID_MATCH_INT_INFO,	\
	.idVendor = (v),				\
	.idProduct = (p),				\
	.bDeviceClass = 0xff,				\
	.bDeviceSubClass = 0xff,			\
	.bDeviceProtocol = 0xff,			\
	.bInterfaceClass = 0xff,			\
	.bInterfaceSubClass = 0xff,			\
	.bInterfaceProtocol = 0xff,			\
}


/** USB device ID's that we handle */
static struct usb_device_id i1480_usb_id_table[] = {
	i1480_USB_DEV(0x8086, 0xdf3b),
	i1480_USB_DEV(0x15a9, 0x0005),
	i1480_USB_DEV(0x07d1, 0x3802),
	i1480_USB_DEV(0x050d, 0x305a),
	i1480_USB_DEV(0x3495, 0x3007),
	{},
};
MODULE_DEVICE_TABLE(usb, i1480_usb_id_table);


static struct usb_driver i1480_dfu_driver = {
	.name =		"i1480-dfu-usb",
	.id_table =	i1480_usb_id_table,
	.probe =	i1480_usb_probe,
	.disconnect =	NULL,
};


/*
 * Initialize the i1480 DFU driver.
 *
 * We also need to register our function for guessing event sizes.
 */
static int __init i1480_dfu_driver_init(void)
{
	return usb_register(&i1480_dfu_driver);
}
module_init(i1480_dfu_driver_init);


static void __exit i1480_dfu_driver_exit(void)
{
	usb_deregister(&i1480_dfu_driver);
}
module_exit(i1480_dfu_driver_exit);


MODULE_AUTHOR("Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>");
MODULE_DESCRIPTION("Intel Wireless UWB Link 1480 firmware uploader for USB");
MODULE_LICENSE("GPL");
OpenPOWER on IntegriCloud