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 31 static 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 89 exit: 90 release_firmware(fw); 91 92 return -ENOENT; 93 } 94 95 int rt2x00lib_load_firmware(struct rt2x00_dev *rt2x00dev) 96 { 97 int retval; 98 99 if (!rt2x00_has_cap_flag(rt2x00dev, REQUIRE_FIRMWARE)) 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 } 124 125 void rt2x00lib_free_firmware(struct rt2x00_dev *rt2x00dev) 126 { 127 release_firmware(rt2x00dev->fw); 128 rt2x00dev->fw = NULL; 129 } 130