1/*
2	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
3	Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
4	<http://rt2x00.serialmonkey.com>
5
6	This program is free software; you can redistribute it and/or modify
7	it under the terms of the GNU General Public License as published by
8	the Free Software Foundation; either version 2 of the License, or
9	(at your option) any later version.
10
11	This program is distributed in the hope that it will be useful,
12	but WITHOUT ANY WARRANTY; without even the implied warranty of
13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	GNU General Public License for more details.
15
16	You should have received a copy of the GNU General Public License
17	along with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20/*
21	Module: rt2x00lib
22	Abstract: rt2x00 firmware loading routines.
23 */
24
25#include <linux/kernel.h>
26#include <linux/module.h>
27
28#include "rt2x00.h"
29#include "rt2x00lib.h"
30
31static int rt2x00lib_request_firmware(struct rt2x00_dev *rt2x00dev)
32{
33	struct device *device = wiphy_dev(rt2x00dev->hw->wiphy);
34	const struct firmware *fw;
35	char *fw_name;
36	int retval;
37
38	/*
39	 * Read correct firmware from harddisk.
40	 */
41	fw_name = rt2x00dev->ops->lib->get_firmware_name(rt2x00dev);
42	if (!fw_name) {
43		rt2x00_err(rt2x00dev,
44			   "Invalid firmware filename\n"
45			   "Please file bug report to %s\n", DRV_PROJECT);
46		return -EINVAL;
47	}
48
49	rt2x00_info(rt2x00dev, "Loading firmware file '%s'\n", fw_name);
50
51	retval = request_firmware(&fw, fw_name, device);
52	if (retval) {
53		rt2x00_err(rt2x00dev, "Failed to request Firmware\n");
54		return retval;
55	}
56
57	if (!fw || !fw->size || !fw->data) {
58		rt2x00_err(rt2x00dev, "Failed to read Firmware\n");
59		release_firmware(fw);
60		return -ENOENT;
61	}
62
63	rt2x00_info(rt2x00dev, "Firmware detected - version: %d.%d\n",
64		    fw->data[fw->size - 4], fw->data[fw->size - 3]);
65	snprintf(rt2x00dev->hw->wiphy->fw_version,
66			sizeof(rt2x00dev->hw->wiphy->fw_version), "%d.%d",
67			fw->data[fw->size - 4], fw->data[fw->size - 3]);
68
69	retval = rt2x00dev->ops->lib->check_firmware(rt2x00dev, fw->data, fw->size);
70	switch (retval) {
71	case FW_OK:
72		break;
73	case FW_BAD_CRC:
74		rt2x00_err(rt2x00dev, "Firmware checksum error\n");
75		goto exit;
76	case FW_BAD_LENGTH:
77		rt2x00_err(rt2x00dev, "Invalid firmware file length (len=%zu)\n",
78			   fw->size);
79		goto exit;
80	case FW_BAD_VERSION:
81		rt2x00_err(rt2x00dev, "Current firmware does not support detected chipset\n");
82		goto exit;
83	}
84
85	rt2x00dev->fw = fw;
86
87	return 0;
88
89exit:
90	release_firmware(fw);
91
92	return -ENOENT;
93}
94
95int rt2x00lib_load_firmware(struct rt2x00_dev *rt2x00dev)
96{
97	int retval;
98
99	if (!test_bit(REQUIRE_FIRMWARE, &rt2x00dev->cap_flags))
100		return 0;
101
102	if (!rt2x00dev->fw) {
103		retval = rt2x00lib_request_firmware(rt2x00dev);
104		if (retval)
105			return retval;
106	}
107
108	/*
109	 * Send firmware to the device.
110	 */
111	retval = rt2x00dev->ops->lib->load_firmware(rt2x00dev,
112						    rt2x00dev->fw->data,
113						    rt2x00dev->fw->size);
114
115	/*
116	 * When the firmware is uploaded to the hardware the LED
117	 * association status might have been triggered, for correct
118	 * LED handling it should now be reset.
119	 */
120	rt2x00leds_led_assoc(rt2x00dev, false);
121
122	return retval;
123}
124
125void rt2x00lib_free_firmware(struct rt2x00_dev *rt2x00dev)
126{
127	release_firmware(rt2x00dev->fw);
128	rt2x00dev->fw = NULL;
129}
130