Qual a versão do kernel? Qual erro? 2011/8/27 Jorge Barros de Abreu <[email protected]>
> Olá. > > Preciso de ajuda com esse tutorial. O título é: > > Writing device drivers in Linux: A brief tutorial > > O link é: > > http://www.freesoftwaremagazine.com/node/1238/pdf > > Não consegui fazer a compilação do memory.c e nem do paralelport.c > > nem com gcc nem com makefile. > > memory.c > ################### > /* Necessary includes for device drivers */ > #include <linux/init.h> > #include <linux/config.h> > #include <linux/module.h> > #include <linux/kernel.h> /* printk() */ > #include <linux/slab.h> /* kmalloc() */ > #include <linux/fs.h> /* everything... */ > #include <linux/errno.h> /* error codes */ > #include <linux/types.h> /* size_t */ > #include <linux/proc_fs.h> > #include <linux/fcntl.h> /* O_ACCMODE */ > #include <asm/system.h> /* cli(), *_flags */ > #include <asm/uaccess.h> /* copy_from/to_user */ > > MODULE_LICENSE("Dual BSD/GPL"); > > /* Declaration of memory.c functions */ > int memory_open(struct inode *inode, struct file *filp); > int memory_release(struct inode *inode, struct file *filp); > ssize_t memory_read(struct file *filp, char *buf, size_t count, loff_t > *f_pos); > ssize_t memory_write(struct file *filp, char *buf, size_t count, loff_t > *f_pos); > void memory_exit(void); > int memory_init(void); > > /* Structure that declares the usual file */ > /* access functions */ > struct file_operations memory_fops = { > read: memory_read, > write: memory_write, > open: memory_open, > release: memory_release > }; > > /* Declaration of the init and exit functions */ > module_init(memory_init); > module_exit(memory_exit); > > /* Global variables of the driver */ > /* Major number */ > int memory_major = 60; > /* Buffer to store data */ > char *memory_buffer; > > > > > > > int memory_init(void) { > int result; > > /* Registering device */ > result = register_chrdev(memory_major, "memory", &memory_fops); > if (result < 0) { > printk( > "<1>memory: cannot obtain major number %d\n", memory_major); > return result; > } > > /* Allocating memory for the buffer */ > memory_buffer = kmalloc(1, GFP_KERNEL); > if (!memory_buffer) { > result = -ENOMEM; > goto fail; > } > memset(memory_buffer, 0, 1); > > printk("<1>Inserting memory module\n"); > return 0; > > fail: > memory_exit(); > return result; > } > > > > > > > void memory_exit(void) { > /* Freeing the major number */ > unregister_chrdev(memory_major, "memory"); > > /* Freeing buffer memory */ > if (memory_buffer) { > kfree(memory_buffer); > } > > printk("<1>Removing memory module\n"); > > } > > > > > > > int memory_open(struct inode *inode, struct file *filp) { > > /* Success */ > return 0; > } > > > > > > > ssize_t memory_read(struct file *filp, char *buf, > size_t count, loff_t *f_pos) { > > /* Transfering data to user space */ > copy_to_user(buf,memory_buffer,1); > > /* Changing reading position as best suits */ > if (*f_pos == 0) { > *f_pos+=1; > return 1; > } else { > return 0; > } > } > > > > > > ssize_t memory_write( struct file *filp, char *buf, > size_t count, loff_t *f_pos) { > > char *tmp; > > tmp=buf+count-1; > copy_from_user(memory_buffer,tmp,1); > return 1; > } > > > > Paralelport.c > ################# > /* Necessary includes for drivers */ > #include <linux/init.h> > #include <linux/config.h> > #include <linux/module.h> > #include <linux/kernel.h> /* printk() */ > #include <linux/slab.h> /* kmalloc() */ > #include <linux/fs.h> /* everything... */ > #include <linux/errno.h> /* error codes */ > #include <linux/types.h> /* size_t */ > #include <linux/proc_fs.h> > #include <linux/fcntl.h> /* O_ACCMODE */ > #include <linux/ioport.h> > #include <asm/system.h> /* cli(), *_flags */ > #include <asm/uaccess.h> /* copy_from/to_user */ > #include <asm/io.h> /* inb, outb */ > > MODULE_LICENSE("Dual BSD/GPL"); > > /* Function declaration of parlelport.c */ > int parlelport_open(struct inode *inode, struct file *filp); > int parlelport_release(struct inode *inode, struct file *filp); > ssize_t parlelport_read(struct file *filp, char *buf, > size_t count, loff_t *f_pos); > ssize_t parlelport_write(struct file *filp, char *buf, > size_t count, loff_t *f_pos); > void parlelport_exit(void); > int parlelport_init(void); > > /* Structure that declares the common */ > /* file access fcuntions */ > struct file_operations parlelport_fops = { > read: parlelport_read, > write: parlelport_write, > open: parlelport_open, > release: parlelport_release > }; > > /* Driver global variables */ > /* Major number */ > int parlelport_major = 61; > > /* Control variable for memory */ > /* reservation of the parallel port*/ > int port; > > module_init(parlelport_init); > module_exit(parlelport_exit); > > > > > int parlelport_init(void) { > int result; > /* Registering device */ > result = register_chrdev(parlelport_major, "parlelport", > &parlelport_fops); > if (result < 0) { > printk( > "<1>parlelport: cannot obtain major number %d\n", > parlelport_major); > return result; > } > <parlelport modified init module> > printk("<1>Inserting parlelport module\n"); > return 0; > fail: > parlelport_exit(); > return result; > } > > > > > > void parlelport_exit(void) { > /* Make major number free! */ > unregister_chrdev(parlelport_major, "parlelport"); > <parlelport modified exit module> > printk("<1>Removing parlelport module\n"); > } > > > > > > > int parlelport_open(struct inode *inode, struct file *filp) { > /* Success */ > return 0; > } > > > > > > int parlelport_release(struct inode *inode, struct file *filp) { > /* Success */ > return 0; > } > > > > > > ssize_t parlelport_read(struct file *filp, char *buf, > size_t count, loff_t *f_pos) { > /* Buffer to read the device */ > char parlelport_buffer; > <parlelport inport> > /* We transfer data to user space */ > copy_to_user(buf,&parlelport_buffer,1); > /* We change the reading position as best suits */ > if (*f_pos == 0) { > *f_pos+=1; > return 1; > } else { > return 0; > } > } > > > > > > > ssize_t parlelport_write( struct file *filp, char *buf, > size_t count, loff_t *f_pos) { > char *tmp; > /* Buffer writing to the device */ > char parlelport_buffer; > } > > > > > > tmp=buf+count-1; > copy_from_user(&parlelport_buffer,tmp,1); > <parlelport outport> > return 1; > } > > > > -- > Data Estelar 2455801,305336 > http://sites.google.com/site/ficmatinf > Desejo-lhe Paz, Vida Longa e Prosperidade. > São Bem Vindas Mensagens no Formato texto UTF-8 com Acentos. > > -- > GUS-BR - Grupo de Usuários de Slackware Brasil > http://www.slackwarebrasil.org/ > http://groups.google.com/group/slack-users-br > > Antes de perguntar: > http://www.istf.com.br/perguntas/ > > Para sair da lista envie um e-mail para: > [email protected] -- GUS-BR - Grupo de Usuários de Slackware Brasil http://www.slackwarebrasil.org/ http://groups.google.com/group/slack-users-br Antes de perguntar: http://www.istf.com.br/perguntas/ Para sair da lista envie um e-mail para: [email protected]
