diff options
Diffstat (limited to 'drivers/net/wimax_cmc/firmware.c')
| -rw-r--r-- | drivers/net/wimax_cmc/firmware.c | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/drivers/net/wimax_cmc/firmware.c b/drivers/net/wimax_cmc/firmware.c new file mode 100644 index 0000000..d31eb8c --- /dev/null +++ b/drivers/net/wimax_cmc/firmware.c @@ -0,0 +1,247 @@ +/* + * firmware.c + * + * functions for Linux filesystem access + * Firmware binary file is on the filesystem, read fild and send it through SDIO + */ +#include "firmware.h" +#include <linux/wimax/samsung/wimax732.h> + +#define SEEK_SET 0 +#define SEEK_CUR 1 +#define SEEK_END 2 +#define WIMAX_BAT_SYSPATH \ + "/sys/devices/platform/sec-battery/power_supply/battery/wimax" + +/****************************************************************************** + * Library Functions + ******************************************************************************/ + +/*! + ************************************************************************* + * \brief file open. + * + * user context. + * + * \return file pointer, if error, return NULL. + *************************************************************************/ +struct file *klib_fopen( + const char *filename, /*!< filename to open */ + /*!< O_RDONLY, O_WRONLY, O_RDWR, O_CREAT, + O_EXCL, O_TRUNC, O_APPEND, O_NONBLOCK, O_SYNC,...*/ + int flags, + /*!< file creation permisstion. S_IRxxx + S_IWxxx S_IXxxx (xxx=USR,GRP,OTH), S_IRWXx(x=U,G,O)*/ + int mode + ) +{ + struct file *filp = filp_open(filename, flags, mode); + return (IS_ERR(filp)) ? NULL : filp; +} + +/*! + ************************************************************************* + * \brief file close. + * + * user context. + * + * \return none. + *************************************************************************/ +void klib_fclose( + struct file *filp /*!< file pointer */ + ) +{ + if (filp) + fput(filp); +} + +/*! + ************************************************************************* + * \brief move file pointer to the request. + * + * user context + * do not support SEEK_END + * no boundary check (file position may exceed file size). + * + * \return . + *************************************************************************/ +int klib_fseek( + struct file *filp, /*!< file pointer */ + int offset, /*!< */ + int whence /*!< SEEK_SET, SEEK_CUR */ + ) +{ + int pos = filp->f_pos; + + if (filp) { + if (whence == SEEK_SET) + pos = offset; + + else if (whence == SEEK_CUR) + pos += offset; + + if (pos < 0) + pos = 0; + + filp->f_pos = pos; + return pos; + } else + return -ENOENT; +} + + + +/*! + ************************************************************************* + * \brief file read function. + * + * user context. + * + * \return actually read number, 0 = EOF, negative = error. + *************************************************************************/ +int +klib_fread( + char *buf, /*!< buffer to read into */ + int len, /*!< number of bytes to read */ + struct file *filp /*!< file pointer */ + ) +{ + int readlen; + mm_segment_t oldfs; + + if (filp == NULL) { + printk(KERN_INFO "filp == NULL\n"); + return -ENOENT; + } + + if (filp->f_op->read == NULL) { + printk(KERN_INFO "filp->f_op->read == NULL\n"); + return -ENOSYS; + } + + if (((filp->f_flags & O_ACCMODE) & O_RDONLY) != 0) { + printk(KERN_INFO "((filp->f_flags & O_ACCMODE) & O_RDONLY) != 0\n"); + return -EACCES; + } + + oldfs = get_fs(); + set_fs(KERNEL_DS); + readlen = filp->f_op->read(filp, buf, len, &filp->f_pos); + set_fs(oldfs); + + return readlen; +} + +int klib_flen_fcopy(char *buf, int len, struct file *filp) +{ + int readlen; + mm_segment_t oldfs; + + oldfs = get_fs(); + set_fs(KERNEL_DS); + readlen = filp->f_op->read(filp, buf, len, &filp->f_pos); + set_fs(oldfs); + + return readlen; +} + +/*! + ************************************************************************* + * \brief . + * + * user context. + * + * \return read character, EOF if end of file. + *************************************************************************/ +int klib_fgetc( + struct file *filp /*!< file pointer */ + ) +{ + int len; + u_char buf[4]; + + len = klib_fread((char *)buf, 1, filp); + if (len > 0) + return buf[0]; + else if (len == 0) + return -1; + else + return len; +} + +/*! + ************************************************************************* + * \brief to get the length of file. + * + * detailed decrtiption. + * + * \return . + *************************************************************************/ +int klib_flength( + struct file *filp /*!< file pointer */ + ) +{ + int total_len = 0; + int buf; + + do { + buf = klib_fgetc(filp); + if (buf == -1) + break; + total_len++; + } while (1); + + klib_fseek(filp, 0, SEEK_SET); + + return total_len; +} + +/*! + ************************************************************************* + * \brief file write function. + * + * user context. + * + * \return actually write number, 0 = EOF, negative = error. + *************************************************************************/ +int klib_fwrite( + char *buf, /*!< buffer to write into */ + int len, /*!< number of bytes to write */ + struct file *filp /*!< file pointer */ + ) +{ + int writelen; + mm_segment_t oldfs; + + if (filp == NULL) { + printk(KERN_INFO "filp == NULL\n"); + return -ENOENT; + } + + if (filp->f_op->write == NULL) { + printk(KERN_INFO "filp->f_op->write == NULL\n"); + return -ENOSYS; + } + + oldfs = get_fs(); + set_fs(KERNEL_DS); + writelen = filp->f_op->write(filp, buf, len, &filp->f_pos); + set_fs(oldfs); + + return writelen; +} + +void s3c_bat_use_wimax(int onoff) +{ + struct file *fp; + fp = klib_fopen(WIMAX_BAT_SYSPATH, O_RDWR, 0); + + if (!fp) + pr_err("open fail"); + if (onoff) + klib_fwrite("1", 1, fp); + else + klib_fwrite("0", 1, fp); + klib_fclose(fp); +} +EXPORT_SYMBOL(s3c_bat_use_wimax); |