1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
4	Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
5	<http://rt2x00.serialmonkey.com>
6
7 */
8
9/*
10	Module: rt2x00lib
11	Abstract: rt2x00 firmware loading routines.
12 */
13
14#include <linux/kernel.h>
15#include <linux/module.h>
16
17#include "rt2x00.h"
18#include "rt2x00lib.h"
19
20static int rt2x00lib_request_firmware(struct rt2x00_dev *rt2x00dev)
21{
22	struct device *device = wiphy_dev(rt2x00dev->hw->wiphy);
23	const struct firmware *fw;
24	char *fw_name;
25	int retval;
26
27	/*
28	 * Read correct firmware from harddisk.
29	 */
30	fw_name = rt2x00dev->ops->lib->get_firmware_name(rt2x00dev);
31	if (!fw_name) {
32		rt2x00_err(rt2x00dev,
33			   "Invalid firmware filename\n"
34			   "Please file bug report to %s\n", DRV_PROJECT);
35		return -EINVAL;
36	}
37
38	rt2x00_info(rt2x00dev, "Loading firmware file '%s'\n", fw_name);
39
40	retval = request_firmware(&fw, fw_name, device);
41	if (retval) {
42		rt2x00_err(rt2x00dev, "Failed to request Firmware\n");
43		return retval;
44	}
45
46	if (!fw || !fw->size || !fw->data) {
47		rt2x00_err(rt2x00dev, "Failed to read Firmware\n");
48		release_firmware(fw);
49		return -ENOENT;
50	}
51
52	rt2x00_info(rt2x00dev, "Firmware detected - version: %d.%d\n",
53		    fw->data[fw->size - 4], fw->data[fw->size - 3]);
54	snprintf(rt2x00dev->hw->wiphy->fw_version,
55			sizeof(rt2x00dev->hw->wiphy->fw_version), "%d.%d",
56			fw->data[fw->size - 4], fw->data[fw->size - 3]);
57
58	retval = rt2x00dev->ops->lib->check_firmware(rt2x00dev, fw->data, fw->size);
59	switch (retval) {
60	case FW_OK:
61		break;
62	case FW_BAD_CRC:
63		rt2x00_err(rt2x00dev, "Firmware checksum error\n");
64		goto exit;
65	case FW_BAD_LENGTH:
66		rt2x00_err(rt2x00dev, "Invalid firmware file length (len=%zu)\n",
67			   fw->size);
68		goto exit;
69	case FW_BAD_VERSION:
70		rt2x00_err(rt2x00dev, "Current firmware does not support detected chipset\n");
71		goto exit;
72	}
73
74	rt2x00dev->fw = fw;
75
76	return 0;
77
78exit:
79	release_firmware(fw);
80
81	return -ENOENT;
82}
83
84int rt2x00lib_load_firmware(struct rt2x00_dev *rt2x00dev)
85{
86	int retval;
87
88	if (!rt2x00_has_cap_flag(rt2x00dev, REQUIRE_FIRMWARE))
89		return 0;
90
91	if (!rt2x00dev->fw) {
92		retval = rt2x00lib_request_firmware(rt2x00dev);
93		if (retval)
94			return retval;
95	}
96
97	/*
98	 * Send firmware to the device.
99	 */
100	retval = rt2x00dev->ops->lib->load_firmware(rt2x00dev,
101						    rt2x00dev->fw->data,
102						    rt2x00dev->fw->size);
103
104	/*
105	 * When the firmware is uploaded to the hardware the LED
106	 * association status might have been triggered, for correct
107	 * LED handling it should now be reset.
108	 */
109	rt2x00leds_led_assoc(rt2x00dev, false);
110
111	return retval;
112}
113
114void rt2x00lib_free_firmware(struct rt2x00_dev *rt2x00dev)
115{
116	release_firmware(rt2x00dev->fw);
117	rt2x00dev->fw = NULL;
118}
119