#ifndef __DT_COMMON_H #define __DT_COMMON_H #include <errno.h> #include <fcntl.h> #include <stdbool.h> #include <stdint.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/ioctl.h> #include <sys/stat.h> #include <mtd/mtd-abi.h> /** * container_of - cast a member of a structure out to the containing structure * @ptr: the pointer to the member. * @type: the type of the container struct this is embedded in. * @member: the name of the member within the struct. * */ #define container_of(ptr, type, member) ({ \ const typeof( ((type *)0)->member ) *__mptr = (ptr); \ (type *)( (char *)__mptr - offsetof(type,member) );}) #undef offsetof #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) #ifdef DEBUG #define pr_debug(fmt, arg...) fprintf(stderr, fmt, ##arg) #else #define pr_debug(fmt, arg...) #endif #define pr_err(fmt, arg...) fprintf(stderr, fmt, ##arg) #define dev_err(dev, fmt, arg...) pr_err(fmt, ##arg) #define dev_warn(dev, fmt, arg...) pr_err(fmt, ##arg) #define dev_info(dev, fmt, arg...) pr_err(fmt, ##arg) #define dev_dbg(dev, fmt, arg...) pr_debug(fmt, ##arg) static inline void *xzalloc(size_t size) { return calloc(1, size); } /* * Kernel pointers have redundant information, so we can use a * scheme where we can return either an error code or a dentry * pointer with the same return value. * * This should be a per-architecture thing, to allow different * error and pointer decisions. */ #define MAX_ERRNO 4095 #ifndef __ASSEMBLY__ #define IS_ERR_VALUE(x) ((x) >= (unsigned long)-MAX_ERRNO) static inline void *ERR_PTR(long error) { return (void *) error; } static inline long PTR_ERR(const void *ptr) { return (long) ptr; } static inline long IS_ERR(const void *ptr) { return IS_ERR_VALUE((unsigned long)ptr); } static inline long IS_ERR_OR_NULL(const void *ptr) { return !ptr || IS_ERR_VALUE((unsigned long)ptr); } /** * ERR_CAST - Explicitly cast an error-valued pointer to another pointer type * @ptr: The pointer to cast. * * Explicitly cast an error-valued pointer to another pointer type in such a * way as to make it clear that's what's going on. */ static inline void *ERR_CAST(const void *ptr) { /* cast away the const */ return (void *) ptr; } /** * strlcpy - Copy a %NUL terminated string into a sized buffer * @dest: Where to copy the string to * @src: Where to copy the string from * @size: size of destination buffer * * Compatible with *BSD: the result is always a valid * NUL-terminated string that fits in the buffer (unless, * of course, the buffer size is zero). It does not pad * out the result like strncpy() does. */ static inline size_t strlcpy(char *dest, const char *src, size_t size) { size_t ret = strlen(src); if (size) { size_t len = (ret >= size) ? size - 1 : ret; memcpy(dest, src, len); dest[len] = '\0'; } return ret; } /* Like strncpy but make sure the resulting string is always 0 terminated. */ static inline char * safe_strncpy(char *dst, const char *src, size_t size) { if (!size) return dst; dst[--size] = '\0'; return strncpy(dst, src, size); } static inline char *xstrdup(const char *s) { char *p = strdup(s); if (!p) exit(EXIT_FAILURE); return p; } static inline int erase(int fd, size_t count, loff_t offset) { struct erase_info_user erase = { .start = offset, .length = count, }; return ioctl(fd, MEMERASE, &erase); } /* * read_full - read from filedescriptor * * Like read, but this function only returns less bytes than * requested when the end of file is reached. */ static inline int read_full(int fd, void *buf, size_t size) { size_t insize = size; int now; int total = 0; while (size) { now = read(fd, buf, size); if (now == 0) return total; if (now < 0) return now; total += now; size -= now; buf += now; } return insize; } static inline void *read_file(const char *filename, size_t *size) { int fd; struct stat s; void *buf = NULL; int ret; if (stat(filename, &s)) return NULL; buf = xzalloc(s.st_size + 1); fd = open(filename, O_RDONLY); if (fd < 0) goto err_out; if (read_full(fd, buf, s.st_size) < s.st_size) goto err_out1; close(fd); if (size) *size = s.st_size; return buf; err_out1: close(fd); err_out: free(buf); return NULL; } /* * write_full - write to filedescriptor * * Like write, but guarantees to write the full buffer out, else * it returns with an error. */ static inline int write_full(int fd, void *buf, size_t size) { size_t insize = size; int now; while (size) { now = write(fd, buf, size); if (now <= 0) return now; size -= now; buf += now; } return insize; } #define MAX_DRIVER_NAME 32 #define DEVICE_ID_SINGLE -1 struct device_d { char name[MAX_DRIVER_NAME]; int id; struct device_node *device_node; }; static inline struct param_d *dev_add_param_int(struct device_d *dev, const char *name, int (*set)(struct param_d *p, void *priv), int (*get)(struct param_d *p, void *priv), int *value, const char *format, void *priv) { return NULL; } static inline struct param_d *dev_add_param_enum(struct device_d *dev, const char *name, int (*set)(struct param_d *p, void *priv), int (*get)(struct param_d *p, void *priv), int *value, const char **names, int max, void *priv) { return NULL; } static inline struct param_d *dev_add_param_bool(struct device_d *dev, const char *name, int (*set)(struct param_d *p, void *priv), int (*get)(struct param_d *p, void *priv), int *value, void *priv) { return NULL; } static inline struct param_d *dev_add_param_mac(struct device_d *dev, const char *name, int (*set)(struct param_d *p, void *priv), int (*get)(struct param_d *p, void *priv), uint8_t *mac, void *priv) { return NULL; } struct driver_d; static inline int register_driver(struct driver_d *d) { return 0; } static inline int register_device(struct device_d *d) { return 0; } static inline int unregister_device(struct device_d *d) { return 0; } #define cpu_to_be32 __cpu_to_be32 #define be32_to_cpu __be32_to_cpu #define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a) - 1) #define __ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask)) #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) #define __maybe_unused __attribute__((unused)) #endif uint32_t crc32(uint32_t crc, const void *_buf, unsigned int len); uint32_t crc32_no_comp(uint32_t crc, const void *_buf, unsigned int len); #endif /* __DT_COMMON_H */