summaryrefslogtreecommitdiffstats
path: root/drivers/uwb/i1480/dfu/dfu.c
blob: 9097b3b303856b8aa4cbb1b52eacff4216661e8a (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
/*
 * Intel Wireless UWB Link 1480
 * Main driver
 *
 * 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.
 *
 *
 * Common code for firmware upload used by the USB and PCI version;
 * i1480_fw_upload() takes a device descriptor and uses the function
 * pointers it provides to upload firmware and prepare the PHY.
 *
 * As well, provides common functions used by the rest of the code.
 */
#include "i1480-dfu.h"
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/device.h>
#include <linux/uwb.h>
#include <linux/random.h>

#define D_LOCAL 0
#include <linux/uwb/debug.h>

/**
 * i1480_rceb_check - Check RCEB for expected field values
 * @i1480: pointer to device for which RCEB is being checked
 * @rceb: RCEB being checked
 * @cmd: which command the RCEB is related to
 * @context: expected context
 * @expected_type: expected event type
 * @expected_event: expected event
 *
 * If @cmd is NULL, do not print error messages, but still return an error
 * code.
 *
 * Return 0 if @rceb matches the expected values, -EINVAL otherwise.
 */
int i1480_rceb_check(const struct i1480 *i1480, const struct uwb_rceb *rceb,
		     const char *cmd, u8 context, u8 expected_type,
		     unsigned expected_event)
{
	int result = 0;
	struct device *dev = i1480->dev;
	if (rceb->bEventContext != context) {
		if (cmd)
			dev_err(dev, "%s: unexpected context id 0x%02x "
				"(expected 0x%02x)\n", cmd,
				rceb->bEventContext, context);
		result = -EINVAL;
	}
	if (rceb->bEventType != expected_type) {
		if (cmd)
			dev_err(dev, "%s: unexpected event type 0x%02x "
				"(expected 0x%02x)\n", cmd,
				rceb->bEventType, expected_type);
		result = -EINVAL;
	}
	if (le16_to_cpu(rceb->wEvent) != expected_event) {
		if (cmd)
			dev_err(dev, "%s: unexpected event 0x%04x "
				"(expected 0x%04x)\n", cmd,
				le16_to_cpu(rceb->wEvent), expected_event);
		result = -EINVAL;
	}
	return result;
}
EXPORT_SYMBOL_GPL(i1480_rceb_check);


/**
 * Execute a Radio Control Command
 *
 * Command data has to be in i1480->cmd_buf.
 *
 * @returns size of the reply data filled in i1480->evt_buf or < 0 errno
 *          code on error.
 */
ssize_t i1480_cmd(struct i1480 *i1480, const char *cmd_name, size_t cmd_size,
		  size_t reply_size)
{
	ssize_t result;
	struct uwb_rceb *reply = i1480->evt_buf;
	struct uwb_rccb *cmd = i1480->cmd_buf;
	u16 expected_event = reply->wEvent;
	u8 expected_type = reply->bEventType;
	u8 context;

	d_fnstart(3, i1480->dev, "(%p, %s, %zu)\n", i1480, cmd_name, cmd_size);
	init_completion(&i1480->evt_complete);
	i1480->evt_result = -EINPROGRESS;
	do {
		get_random_bytes(&context, 1);
	} while (context == 0x00 || context == 0xff);
	cmd->bCommandContext = context;
	result = i1480->cmd(i1480, cmd_name, cmd_size);
	if (result < 0)
		goto error;
	/* wait for the callback to report a event was received */
	result = wait_for_completion_interruptible_timeout(
		&i1480->evt_complete, HZ);
	if (result == 0) {
		result = -ETIMEDOUT;
		goto error;
	}
	if (result < 0)
		goto error;
	result = i1480->evt_result;
	if (result < 0) {
		dev_err(i1480->dev, "%s: command reply reception failed: %zd\n",
			cmd_name, result);
		goto error;
	}
	/*
	 * Firmware versions >= 1.4.12224 for IOGear GUWA100U generate a
	 * spurious notification after firmware is downloaded. So check whether
	 * the receibed RCEB is such notification before assuming that the
	 * command has failed.
	 */
	if (i1480_rceb_check(i1480, i1480->evt_buf, NULL,
			     0, 0xfd, 0x0022) == 0) {
		/* Now wait for the actual RCEB for this command. */
		result = i1480->wait_init_done(i1480);
		if (result < 0)
			goto error;
		result = i1480->evt_result;
	}
	if (result != reply_size) {
		dev_err(i1480->dev, "%s returned only %zu bytes, %zu expected\n",
			cmd_name, result, reply_size);
		result = -EINVAL;
		goto error;
	}
	/* Verify we got the right event in response */
	result = i1480_rceb_check(i1480, i1480->evt_buf, cmd_name, context,
				  expected_type, expected_event);
error:
	d_fnend(3, i1480->dev, "(%p, %s, %zu) = %zd\n",
		i1480, cmd_name, cmd_size, result);
	return result;
}
EXPORT_SYMBOL_GPL(i1480_cmd);


static
int i1480_print_state(struct i1480 *i1480)
{
	int result;
	u32 *buf = (u32 *) i1480->cmd_buf;

	result = i1480->read(i1480, 0x80080000, 2 * sizeof(*buf));
	if (result < 0) {
		dev_err(i1480->dev, "cannot read U & L states: %d\n", result);
		goto error;
	}
	dev_info(i1480->dev, "state U 0x%08x, L 0x%08x\n", buf[0], buf[1]);
error:
	return result;
}


/*
 * PCI probe, firmware uploader
 *
 * _mac_fw_upload() will call rc_setup(), which needs an rc_release().
 */
int i1480_fw_upload(struct i1480 *i1480)
{
	int result;

	result = i1480_pre_fw_upload(i1480);	/* PHY pre fw */
	if (result < 0 && result != -ENOENT) {
		i1480_print_state(i1480);
		goto error;
	}
	result = i1480_mac_fw_upload(i1480);	/* MAC fw */
	if (result < 0) {
		if (result == -ENOENT)
			dev_err(i1480->dev, "Cannot locate MAC FW file '%s'\n",
				i1480->mac_fw_name);
		else
			i1480_print_state(i1480);
		goto error;
	}
	result = i1480_phy_fw_upload(i1480);	/* PHY fw */
	if (result < 0 && result != -ENOENT) {
		i1480_print_state(i1480);
		goto error_rc_release;
	}
	/*
	 * FIXME: find some reliable way to check whether firmware is running
	 * properly. Maybe use some standard request that has no side effects?
	 */
	dev_info(i1480->dev, "firmware uploaded successfully\n");
error_rc_release:
	if (i1480->rc_release)
		i1480->rc_release(i1480);
	result = 0;
error:
	return result;
}
EXPORT_SYMBOL_GPL(i1480_fw_upload);
OpenPOWER on IntegriCloud