1 /* 2 * Copyright (c) 2015 Michael Neumann 3 * Copyright (c) 2016 François Tigeot 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice unmodified, this list of conditions, and the following 11 * disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef _LINUX_FIRMWARE_H_ 29 #define _LINUX_FIRMWARE_H_ 30 31 #include <sys/bus.h> 32 #include <sys/firmware.h> 33 #include <linux/types.h> 34 #include <linux/compiler.h> 35 #include <linux/gfp.h> 36 #include <linux/device.h> 37 38 static inline int 39 request_firmware(const struct firmware **fw, const char *name, __unused struct device *dev) { 40 *fw = firmware_get(name); 41 if (*fw) { 42 return 0; 43 } 44 return -ENOENT; 45 } 46 47 static inline int 48 request_firmware_nowait(struct module *module, bool uevent, 49 const char *name, struct device *device, gfp_t gfp, void *context, 50 void (*cont)(const struct firmware *fw, void *context)) 51 { 52 const struct firmware *fw; 53 54 fw = firmware_get(name); 55 if (fw == NULL) { 56 return -ENOENT; 57 } 58 59 cont(fw, context); 60 61 return 0; 62 } 63 64 static inline void 65 release_firmware(const struct firmware *fw) { 66 if (fw != NULL) { 67 firmware_put(fw, FIRMWARE_UNLOAD); 68 } 69 } 70 71 #endif /* _LINUX_FIRMWARE_H_ */ 72