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, write to the 18 Free Software Foundation, Inc., 19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 20 */ 21 22/* 23 Module: rt2x00lib 24 Abstract: rt2x00 firmware loading routines. 25 */ 26 27#include <linux/kernel.h> 28#include <linux/module.h> 29 30#include "rt2x00.h" 31#include "rt2x00lib.h" 32 33static int rt2x00lib_request_firmware(struct rt2x00_dev *rt2x00dev) 34{ 35 struct device *device = wiphy_dev(rt2x00dev->hw->wiphy); 36 const struct firmware *fw; 37 char *fw_name; 38 int retval; 39 40 /* 41 * Read correct firmware from harddisk. 42 */ 43 fw_name = rt2x00dev->ops->lib->get_firmware_name(rt2x00dev); 44 if (!fw_name) { 45 ERROR(rt2x00dev, 46 "Invalid firmware filename.\n" 47 "Please file bug report to %s.\n", DRV_PROJECT); 48 return -EINVAL; 49 } 50 51 INFO(rt2x00dev, "Loading firmware file '%s'.\n", fw_name); 52 53 retval = request_firmware(&fw, fw_name, device); 54 if (retval) { 55 ERROR(rt2x00dev, "Failed to request Firmware.\n"); 56 return retval; 57 } 58 59 if (!fw || !fw->size || !fw->data) { 60 ERROR(rt2x00dev, "Failed to read Firmware.\n"); 61 return -ENOENT; 62 } 63 64 INFO(rt2x00dev, "Firmware detected - version: %d.%d.\n", 65 fw->data[fw->size - 4], fw->data[fw->size - 3]); 66 67 retval = rt2x00dev->ops->lib->check_firmware(rt2x00dev, fw->data, fw->size); 68 switch (retval) { 69 case FW_OK: 70 break; 71 case FW_BAD_CRC: 72 ERROR(rt2x00dev, "Firmware checksum error.\n"); 73 goto exit; 74 case FW_BAD_LENGTH: 75 ERROR(rt2x00dev, 76 "Invalid firmware file length (len=%zu)\n", fw->size); 77 goto exit; 78 case FW_BAD_VERSION: 79 ERROR(rt2x00dev, 80 "Current firmware does not support detected chipset.\n"); 81 goto exit; 82 } 83 84 rt2x00dev->fw = fw; 85 86 return 0; 87 88exit: 89 release_firmware(fw); 90 91 return -ENOENT; 92} 93 94int rt2x00lib_load_firmware(struct rt2x00_dev *rt2x00dev) 95{ 96 int retval; 97 98 if (!test_bit(DRIVER_REQUIRE_FIRMWARE, &rt2x00dev->flags)) 99 return 0; 100 101 if (!rt2x00dev->fw) { 102 retval = rt2x00lib_request_firmware(rt2x00dev); 103 if (retval) 104 return retval; 105 } 106 107 /* 108 * Send firmware to the device. 109 */ 110 retval = rt2x00dev->ops->lib->load_firmware(rt2x00dev, 111 rt2x00dev->fw->data, 112 rt2x00dev->fw->size); 113 114 /* 115 * When the firmware is uploaded to the hardware the LED 116 * association status might have been triggered, for correct 117 * LED handling it should now be reset. 118 */ 119 rt2x00leds_led_assoc(rt2x00dev, false); 120 121 return retval; 122} 123 124void rt2x00lib_free_firmware(struct rt2x00_dev *rt2x00dev) 125{ 126 release_firmware(rt2x00dev->fw); 127 rt2x00dev->fw = NULL; 128} 129