| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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 | |
| 20 | static 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 | |
| 78 | exit: |
| 79 | release_firmware(fw); |
| 80 | |
| 81 | return -ENOENT; |
| 82 | } |
| 83 | |
| 84 | int 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 | |
| 114 | void rt2x00lib_free_firmware(struct rt2x00_dev *rt2x00dev) |
| 115 | { |
| 116 | release_firmware(rt2x00dev->fw); |
| 117 | rt2x00dev->fw = NULL; |
| 118 | } |