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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}