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1// SPDX-License-Identifier: GPL-2.0-or-later2/*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: rt2x00lib11 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 LED106 * association status might have been triggered, for correct107 * 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